Saturday, August 31, 2019
The Purpose Of Barium Swallow Health And Social Care Essay
The most common positive or radiopaque, contrast medium used to visualise the GI system in Ba sulfate which normally merely referred as Ba merely. There is contraindication to barium sulfate. These mixtures are contraindicated and might hold possible opportunity to get away into the peritoneal pit. If big sum of Ba sulphate flight into the peritoneal pit, this can take to enteric infarcts or peritoneal inflammation. This flight may happen through a pierced syrupy or during surgery that follow the radiographic process. Pathologic indicant for Ba sups This process is done to bespeak when the patient have anemia, mechanical hurting on swallowing, reflux, Preoperative anatomical presentation, appraisal of trachea-esophageal fistulous withers and besides the appraisal of the side of perforation and besides indigestion. The diseased indicant for the Ba swallow scrutiny is achalasia, anatomic anomalousnesss, barrette ââ¬Ës gorge, carcinoma gorge, dyspigia and esophageal varices. Achalasia is a motor upset of the gorge in which vermiculation is reduced along the gorge. Next is anatomic anomalousnesss which caused by disease, such as malignant neoplastic disease of the gorge or possibly. Patients who suffer a shot frequently develop impaired get downing mechanism. Certain nutrients and contrast agents are administrated during the scrutiny for rating of the swelling forms. Dysphagia is trouble in get downing this may due to a congenital or acquired status, a at bay bolus of nutrient or redness. Narrowing and enlarged, flaccid visual aspect of the gorge may be seen during the Ba sup, depending on the cause of the dysphagia. The other indicant for Ba sup is, to bespeak carcinoma of the gorge includes one of the most common malignant of the gorge is ardeno carcinoma. The one of the symptoms of this pathology include dysphagia ( trouble in get downing ) . Last, foreign organic structure are besides can be detect by utilizing this process to the patient that ingest assortment of nutrient including a bolus of nutrient, metallic object and other stuff that will lodge the gorge. Contraindications Nonspecific, nevertheless low solar H2O soluble contrast agents are best used in probes where aspiration may happen. Preparation Patient readying.Before Patient readyingNo readying for Ba swallow scrutiny needed because gorge is empty most of the clip unless an upper GI series is to follow. If the patient is have oning anything metallic from the most to the waist must be removed. Ask the patient to alter to hospital gown. Before the fluoroscopic process is perform, a patients history should be taken and the scrutiny carefully explained to the patient.After readyingWhen the process is done, the patient can go on their regular diet as usual. Take orally administered medicines unless the physician asks non to make so. In 48 to 72 hours after the process, patient stool possibly in grey or white coloring material. Patient may see irregularity and normally been treated by eating laxative. Ask the patient to imbibe a batch of H2O for several yearss to avoid irregularity excessively. If the patient experienced any unable intestine motion or undergo important alterations after the process, inquire them to reach their d octor. Equipment readying Before making this process, the radiographer should fix some equipment such as fluoroscopy table with 90/20 jousts, rapid consecutive skiagraphy ( to border per second ) or video entering possibly required for appraisal if the laryngopharynx and upper gorge during swallow. Some extra equipment besides should necessitate such as disposable cup, little cup for sparkling agent, tissue and besides a straw possibly required for consumption of Ba when the tabular array is horizontal and besides injection disposal equipment. Contrast agent readying In this process, 250 % w/v Ba sulfate suspensions of 100 milliliters are required. Gastrografin ( should non be used for the probe of a trachea-esophageal fistulous withers or when aspiration is possible ) . An sparkling agent will be required for illustration a combination of Na hydrogen carbonate and citric acid, to bring forth C dioxide to dilate the tummy. This will besides move as dual contrast agent against the Ba to heighten the visual image of the mucous membrane. Last, LOCM for about around 350mg I/ml is besides required in this process. Procedure The patient will be place behind the roentgenoscope equipment for the x beam exposure. The process begins with the patient in the vertical or vertical place and the cup of thin Ba is placed in the patients left manus closed to the left shoulder. Then, the patient is asked to get down the liquid in the cup utilizing a straw. The patient is so inquiring to take the effervescent granules ( either dry or assorted with a little sum of H2O if dry granule is excessively hard ) or other effervescent assistance, followed by citric acid. It is of import to affect on the patient that this will bring forth gas in the tummy and may give them the make fulling that they need to burp. To avoid this, the best manner is to state them to maintain swallowing. The enteric piece of land of the next gorge, tummy and duodenum are seeable when the Ba fills and coated it. The radiotherapist observes the flow of the Ba with the roentgenoscope. Swallowing of the thin Ba is observed with the patients in assorted places. The patient will inquire to revolve true 360o at their ain topographic point. This will guarantee all the surfacing facet of the stomachic mucous membrane is ready for the appraisal of the tummy. The patient is inquiring to turn to their left ( LPO ) where a topographic point image is taken. Then, patient will turn their organic structure back to the supine ( AP ) place and bend to their right ( RPO ) . Last, the patient is return to the vertical place, turn somewhat to their left and erect ( LPO ) . Film is taken to demo the distal gorge and the fundus of the tummy. The similar place will be used when the patient get down the thick Ba. The used of the thick Ba allows better visual image of mucosal forms and any lesions within the gorge. The type of Ba used is determined by the radiotherapist. After the vertical survey has been complete, horizontal and trendeleburg places with midst and thin Ba may follow. The x beam radiation is directing by the ten beam machine ( fluoroscopy ) through the patient ââ¬Ës tissue organic structure and to a movie on the opposite side of the patient ââ¬Ës organic structure. Different organic structure tissue will absorbed different sum of radiation that penetrates the organic structure tissue. The abnormalcies, different organ, and some conditions all become seeable on the x beam movie due to difference in the composing since the incursion of the x beam beam is block by them. Radiation Protection Radiation protection is used to except clinically unhelpful scrutinies. They are many ways to cut down unserviceable radiation like minimise the fluoroscopy clip and current so that merely the exact radiation is given to the patient. Use collimation during the process to minimise the field size. Give screening to the sensitive organ of the patient when possible. Introduce QA coder to optimise staff and equipment public presentation and to do regular cheques on. Use video recording equipment alternatively of utilizing cine camera during fluoroscopy. Install modern image intensives with digital image processing possible and sensitive ( e.g. CsI ) photocathodes. Use modern image intensive and topographic point movie photofluoroscopy with 100mm camera alternatively of skiagraphy whenever appropriate. Benefit Upper GI piece of land scrutiny is really safe and noninvasive process. This scrutiny besides leads to an accurate analysis of the gorge, tummy and duodenum. This is because, Ba is non absorbed by the blood the organic structure and allergic reaction due this scrutiny is really rare. No radiation will stay in patient ââ¬Ës organic structure after the process is done n X beam has really less side consequence in the diagnostic scope. Hazards Some patient may see allergic to the flavorer that is added in the Ba. The patient must state the physician if they are allergic to chocolate, citrus fruit or certain berries before the process. There is merely little opportunity that some Ba will stay in the organic structure, taking to a obstruction of the digestive system. So, patient who have an obstructor in the GI piece of land they are non allow undergoing this scrutiny. The effectual radiation dosage for this process is 6mSv which is the same as the mean individual receives from the background radiation in two old ages. Precaution Barium is non be used if perforation is suspected. Pregnant adult females are advised to avoid this process because the radiation exposure may impact the foetus. Role of radiographer Before Arrange the assignment and state the patient about the clip, the day of the month and the topographic point where the scrutiny will be held. As the radiographer, gave the radiation protection to the patient is really of import. Give the patient a shielding to protect them from the radiation that can harm them. The room must be set up decently before the scrutiny took topographic point. Make certain the room is clean and ready to be used. All the equipment ââ¬Ës like cassette 24Ãâ"30 centimeter, little cup and straw and contrast media ( Ba sulfate/gastrografi ) must be prepared before the scrutiny started. Make certain that fluoroscopy unit is in good status. State the patient what they should make and do certain they are all prepared. When the radiographer fix the list for the scrutiny, do certain that the diabetic patient is on the first list. This is because, they have to take their medicine on clip and if the diabetic patient are being ignored, this will do injury to them. During Patient placement Focus oning Collimation Radiologists penchant Adequate supply of cassettes Identity of exposed and unexposed cassettes Exposure factor choice Table position- patient comfort and safety Hand clasps, pes remainder, pillow, reassuarance Drip if any Drumhead
Friday, August 30, 2019
Charles Beard Essay
Charles Beardââ¬â¢s An Economic Interpretation of the U.S Constitution Charles Beardââ¬â¢s book, An Economic Interpretation of the U.S. Constitution, was published in 1913 and soon became one of the most controversial literary works of its time. Beardââ¬â¢s main thesis in this book is essentially that the Founding Fathers chose the specific format of the Constitution of the United States to protect their personal financial interests. Beard then goes on to argue that the Constitution was written by an ââ¬Å"eliteâ⬠attempting to safeguard their own assets and financial status. Beard was expanding on Carl L. Beckerââ¬â¢s thesis of class conflict. In the eyes of Beard, the Constitution was created by the Founding Fathers as a ââ¬Å"counter revolutionâ⬠that ran against the wishes of farmers and laborers. Beardââ¬â¢s theory and his publication of this book were so controversial because it seemed to demean the Constitution and everything it stood for, which angered politicians and most of the legal community, at least those who didnââ¬â¢t ignore it completely. However, many historians and history professors seemed to recognize it and accept it. Many people were angered by Beardââ¬â¢s theory because, since it disparaged the Constitution and Founding Fathers, it seemed to put down almost everything our country stands for. Taking a sacred piece of history that started our nation and trampling on it by saying that it was nothing more than rich men trying to save their bank accounts and put down the common man is bound to upset more than just a few people. One of Beardââ¬â¢s main critics of the 20th century is a man named Forrest McDonald. McDonald uses his study of the voting habits and financial and economic concerns of the delegates at the Constitutional Convention in Philadelphia to prove that their motives were not financial-based. He asserts that the majority of the delegates who had public securities were Antifederalists. He concludes his study by saying, ââ¬Å"Anyone wishing to rewrite the history of those proceedings largely or exclusively in terms of the economic interests represented there would find the facts to be insurmountable obstaclesâ⬠. What McDonald means by this is that Beard, who was attempting to ââ¬Å"rewrite the historyâ⬠of the proceedings of the Constitutional Convention, was doing so without any actual evidence and therefore had an empty argument. I believe that Beardââ¬â¢s thesis, although an interesting notion, was not necessarily a valid argument and did nothing except anger most people in the political community. Even though many people in the late 20th century accepted his thesis, I disagree with it. My reasoning for this is that, although the Founding Fathers were economically prosperous, I believe that their status made them the only ones that could be able to write the Constitution and who were in a position to make the most crucial moves in establishing the United States. I do not believe that the Founding Fathers created the Constitution simply protect their financial status, I believe their status was the reason they could write the Constitution.
Changes And Urban Expansion In Greater Dhaka Environmental Sciences Essay
This survey evaluates old termland usage alterations and urban enlargement in Greater Dhaka, Bangladesh, between 1975 and 2003 utilizing satellite images and socio-economic informations. Spatial and temporal kineticss of old termlandnext term use/cover old termchangesnext term were quantified utilizing three Landsat images, a supervised categorization algorithm and the post-classification old termchangenext term sensing technique in GIS. Accuracy of the Landsat-derived old termlandnext term use/cover maps ranged from 85 to 90 % . The analysis revealed that significant growing of built-up countries in Greater Dhaka over the survey period resulted important lessening in the country of H2O organic structures, cultivated old termland, following term flora and wetlands. old termUrban land expansionnext term has been mostly driven by lift, population growing and economic development. Rapid old termurban expansionnext term through infilling of low-lying countries and glade of flora resulted in a broad scope of environmental impacts, including habitat quality. As dependable and current informations are missing for Bangladesh, the old termlandnext term usage maps produced in this survey will lend to both the development of sustainable old termurban landnext term usage planning determinations and besides for calculating possible hereafter old termchangesnext term in growing forms. Urbanization is one the most widespread anthropogenetic causes of the loss of cultivable old termlandnext term ( Lopez, Bocco, Mendoza, & A ; Duhau, 2001 ) , habitat devastation ( Alphan, 2003 ) , and the diminution in natural flora screen. The transition of rural countries into old termurbannext term countries through development is presently happening at an unprecedented rate in recent human history and is holding a pronounced consequence on the natural operation of ecosystems ( Turner, 1994 ) . Although old termurbannext term countries presently cover merely 3 % of the Earth ââ¬Ës old termlandnext term surface, they have marked effects on environmental conditions at both local and planetary graduated tables ( [ Herold etA al. , 2003 ] and [ Liu and Lathrop, 2002 ] ) , including clime old termchangenext term ( Grimm, Grove, Pickett, & A ; Redman, 2000 ) . Since ecosystems in old termurbannext term countries are strongly influenced by anthropogenetic activities, well more attendi ng is presently being directed towards supervising old termchangesnext term in old termurban landnext term usage and old termlandnext term screen ( LULC ) ( Stow & A ; Chen, 2002 ) . Such surveies are peculiarly of import because the spacial features of LULC are utile for understanding the assorted impacts of human activity on the overall ecological status of the old termurbannext term environment ( Yeh & A ; Li, 1999 ) . LULC old termchangenext term due to human activities is presently continuing more rapidly in developing states than in the developed universe, and it has been projected that by the twelvemonth 2020, most of the universe ââ¬Ës mega metropoliss will be in developing states ( World Bank, 2007 ) . Increasing population in developing metropoliss has caused rapid old termchangesnext term in LULC and increased environmental debasement ( Holdgate, 1993 ) . The consequence of population is peculiarly relevant given that the planetary old termurbannext term population is projected to about duplicate by 2050 ( UN, 2008 ) . In order to extenuate the damaging effects associated with old termurbannext term growing on the environment and to keep optimum ecosystem operation ( Fang, Gertner, Sun, & A ; Anderson, 2005 ) , spacial and temporal LULC forms, and the factors impacting these old termchangesnext term ( Serra, Pons, & A ; Sauri , 2008 ) , are well of import in developing rational economic, societal and environmental policies ( Long, Tang, Li, & A ; Heilig, 2007 ) . Bangladesh has experienced rapid old termurbannext term population growing in recent decennaries ; the population numbered 14.1 million in 1981, 22.5 million in 1991, 31.1 million in 2001 ( BBS, 2001 ) and 35 million in 2005 ( CUS, NIPORT, & A ; MEASURE, 2006 ) . Rapid urbanisation has led to the transmutation of rural countries into developed countries, and it has been estimated that more than 809A km2 of agricultural old termlandnext term is converted to metropoliss, roads and substructure yearly ( BBS, 1996 ) . The lessening in agricultural activities, the largest sector of the Bangladeshi economic system, and the attendant loss of cultivated old termlandnext term is likely to lend to landlessness, nutrient deficits and endanger the economic system ( Ahmad, 2005 ) . Dhaka, the capital of Bangladesh, is expected to be the 3rd largest metropolis in the universe by 2020 ( World Bank, 2007 ) and the rapid old termurbannext term growing experienced by the metropolis in recent decennaries is one of the highest in the universe ( [ Islam, 1999 ] and [ Islam, 2005 ] ) . old termUrban expansionnext term of Dhaka was slow in the 1950s, but strong growing followed the independency of Bangladesh in 1971 ( Chowdhury & A ; Faruqui, 1989 ) . The considerable growing observed in the population of Dhaka is thought to hold occurred in response to large-scale rural-previous termurbannext term migration, which has contributed, significantly to the increased rate of urbanisation ( Islam, 1996 ) . To day of the month, the environmental and socio-economic sustainability of Dhaka, which is indispensable for development planning, has received comparatively small attending. This has resulted in widespread environmental jobs across the metropolis, mostly stemming from unpl anned urbanisation, extensive old termurbannext term poorness, perennial episodes of implosion therapy, significant growing of slums, development of resources, and the misdirection of limited old termlandnext term resources ( Hasan & A ; Mulamoottil, 1994 ) . Geographic Information Systems ( GIS ) and distant detection ( RS ) are powerful and cost-efficient tools for measuring the spacial and temporal kineticss of LULC ( [ Hathout, 2002 ] , [ Herold etA al. , 2003 ] , [ Lambin etA al. , 2003 ] and [ Serra etA al. , 2008 ] ) . Distant feeling informations provide valuable multi-temporal informations on the procedures and forms of LULC old termchange, following term and GIS is utile for function and analysing these forms ( Zhang etA al. , 2002 ) . In add-on, retrospective and consistent synoptic coverage from orbiters is peculiarly utile in countries where old termchangesnext term have been rapid ( Blodget, Taylor, & A ; Roark, 1991 ) . Furthermore, since digital archives of remotely sensed informations provide the chance to analyze historical LULC old termchanges, following term the geographic form of such old termchangesnext term in relation to other environmental and human factors can be evaluated. Numerous old termchangenext term sensing methods have been developed to measure fluctuations in LULC utilizing satellite informations ( [ Coppin etA al. , 2004 ] , [ Lu etA al. , 2004 ] and [ Singh, 1989 ] ) . Of these techniques, the pre- and post-classification comparings have been extensively used ( [ Coppin etA al. , 2004 ] and [ Singh, 1989 ] ) . In the pre-classification attack, processs such as image differencing ( Toll, Royal, & A ; Davis, 1980 ) , band rationing ( Nelson, 1983 ) , old termchangenext term vector analysis ( Johnson & A ; Kasischke, 1998 ) , direct multi-date categorization ( Li & A ; Yeh, 1998 ) , flora index differencing ( Townshend & A ; Justice, 1995 ) and principle constituent analysis ( Fung & A ; LeDrew, 1987 ; Hartter, Lucas, Gaughan, & A ; Aranda, 2008 ) have been developed ( [ Hardin etA al. , 2007 ] , [ Jensen, 1996 ] and [ Singh, 1989 ] ) . The basic premiss of these processs is that old termchangesnext term in LULC consequence in differences in the pel coefficient of reflection values between the day of the months of involvement. However, while these techniques are effectual for turn uping old termchange, following term they can non place the nature of old termchangenext term ( Ridd & A ; Liu, 1998 ) . Conversely, post-classification comparings examine old termchangesnext term over clip between independently classified old termlandnext term screen informations. Despite the troubles associated with post-classification comparings ( [ Coppin etA al. , 2004 ] and [ Singh, 1989 ] ) , this technique is the most widely used for placing LULC old termchangesnext term ( [ Jensen, 1996 ] and [ Lu etA al. , 2004 ] ) , peculiarly in old termurbannext term environments ( Hardin etA al. , 2007 ) . However, one of the disadvantages associated with this attack is that the truth of the end point LULC old termchangenext term maps depends on the truth of the single categorization, intending that such techniques are capable to error extension ( Y uan, Sawaya, Loeffelholz, & A ; Bauer, 2005 ) . However, such post-classification techniques are peculiarly utile for bring forthing ââ¬Ëfrom-to ââ¬Ë maps ( Jensen, 1996 ) , which can be used to clear up the magnitude, location and nature of the old termchangesnext term shown ( Howarth & A ; Wickware, 1981 ) . In add-on, the technique can be employed utilizing informations acquired from detectors with different spatial, temporal and spectral declarations ( [ Alphan, 2003 ] and [ Coppin etA al. , 2004 ] ) . RS is really effectual for exemplifying the interactions between people and the old termurbannext term environments in which they live ( Gatrell & A ; Jensen, 2008 ) . Space-borne orbiter informations are peculiarly utile for developing states due to the cost and clip associated with traditional study methods ( Dong, Forster, & A ; Ticehurst, 1997 ) , and these techniques have become feasible options to conventional study and ground-based old termurbannext term mapping methods ( Jensen, Hodgson, Tullis, & A ; Raber, 2004 ) . Several surveies have demonstrated the pertinence of RS to developing sourcing information and for back uping decision-making activities in a broad scope of old termurbannext term applications ( [ Gatrell and Jensen, 2008 ] , [ Jensen and Cowen, 1999 ] and [ Zeilhofer and Topanotti, 2008 ] ) . In the country of old termurbannext term planning, of import RS research has been conducted to day of the month, peculiarly in old termurban changenext term analysis and th e mold of growing ( [ Bahr, 2004 ] , [ Hardin etA al. , 2007 ] , [ Hathout, 2002 ] , [ Herold etA al. , 2003 ] , [ Jat etA al. , 2008 ] , [ Jensen and Im, 2007 ] , [ Liu and Lathrop, 2002 ] , [ Maktav and Erbek, 2005 ] , [ Ridd and Liu, 1998 ] , [ Yang, 2002 ] and [ Yuan, 2008 ] ) , LULC rating ( [ Alphan, 2003 ] , [ Lopez etA al. , 2001 ] , [ Xiao etA al. , 2006 ] , [ Yang and Lo, 2002 ] and [ Yuan etA al. , 2005 ] ) , and old termurbannext term heat-island research ( [ Kato and Yamaguchi, 2005 ] and [ Weng, 2001 ] ) . In peculiar, RS-based multi-temporal old termlandnext term use old termchangenext term informations provide information that can be used for measuring the structural fluctuation of LULC forms ( Liu, Gao, & A ; Yang, 2003 ) , which can be applied to avoiding irreversible and cumulative effects of old termurbannext term growing ( Yuan, 2008 ) and are of import to optimise the allotment of old termurbannext term services ( Barnsley & A ; Barr, 1996 ) . In add-on, accura te and comprehensive old termlandnext term use old termchangenext term statistics are utile for inventing sustainable old termurbannext term and environmental planning schemes ( [ Alphan, 2003 ] and [ Jensen and Im, 2007 ] ) . It is hence really of import to gauge the rate, form and type of LULC old termchangesnext term in order to foretell future old termchangesnext term in old termurbannext term development. Small is known about the spacial and temporal dimensions of the LULC old termchangesnext term that have shaped the old termurban expansionnext term of Greater Dhaka. Although most developed states have both recent and extended LULC information, the comparative deficiency of geospatial informations or entree thereto, is prevailing in developing states, peculiarly in Bangladesh. For case, aerial exposure are classified for the populace. The metropolis does non hold any official statistics on old termlandnext term usage forms, and the Master Plans do non incorporate either a map or quantitative information on the bing forms of old termlandnext term usage in the metropolis ( [ Islam, 1996 ] and [ Islam, 2005 ] ) . The old termlandnext term usage forms of Greater Dhaka were officially categorized in 1991 utilizing land observation informations ( Flood Action Plan ( FAP ) 8A, 1991 and [ Islam, 2005 ] ) . Due to the easiness of entree and recent nature of nose count records, the local autho ritiess of Dhaka often use nose count informations to construe old termlandnext term use old termchanges.next term As a consequence, the kineticss of development are non clear and frequently deceptive ( Talukder, 2008 ) . Numerous factors, including fiscal restraints, restricted entree to informations, bureaucratism and deficiency of geospatial expertness in the planning bureaus account for the absence of historical and current old termlandnext term usage informations. Furthermore, every bit many as 18 ministries are involved in the development and planning of Dhaka, and there is a general deficiency of coordination between these organic structures ( Mohit, 1991 ) . This empirical survey will try to place the spatio-temporal form of LULC old termchangesnext term for Greater Dhaka utilizing geospatial informations so that both the scientific community and determination shapers can measure the assorted kineticss impacting LULC old termchangesnext term in this old termurbannext term en vironment. The aims of this survey were therefore to research the features of LULC old termchangesnext term and qualify the underlying drive forces in the Greater Dhaka country by doing usage of remotely sensed informations and socio-economic information. Specifically, the aims are: ( a ) to clarify and measure the LULC old termchangesnext term between 1975 and 2003 ; ( B ) to research the spacial and temporal features of old termurban expansionnext term in this period ; and ( degree Celsius ) to analyse the drive forces of old termlandnext term use old termchange and urban expansion.next termStudy countryAs shown in Fig.A 1, the survey country of Greater Dhaka is located in the centre of Bangladesh between 23Aà °68aÃâ ?N ( BTM 533233.91A m ) , 90Aà °33aÃâ ? E ( BTM 619052.83A m ) and 23Aà °90aÃâ ?N ( BTM 550,952.57A m ) , 90Aà °50aÃâ ? E ( BTM 642511.56A m ) , severally. Topographically, the country is level with a surface lift runing from 1 to 14A m ( Fig.A 1 ) , with most old ter murbannext term countries located at lifts runing from 6 to 8A m ( FAP 8A, 1991 ) . The metropolis is situated chiefly on an alluvial patio, popularly known as the Modhupur patio dating from the Pleistocene period. The survey country is surrounded by four major river systems: the Buriganga, Turag, Tongi and the Balu, which flow to the South, west, north and east, severally. These rivers are chiefly fed by local rainfall and besides receive overflow from the well larger Ganges, Brahmaputra and Meghna rivers. The metropolis has a humid sub-tropical monsoon clime and receives about 2000A millimeters of rainfall yearly, more than 80 % of which falls during the monsoon season from June to September. Life-size image ( 137K ) ââ¬â Opens new window Life-size image ( 137K ) Fig.A 1.A Location of survey country. River webs, embankment and administrative units are draped over a digital lift theoretical account. Brightest countries represent higher lift ; bright grey represents average lift while dark pels show the lowest lift.Position Within ArticleThe happening of heavy monsoon rainfall combined with floodwater overflow from the rivers environing the metropolis mean that Dhaka is really prone to monsoon implosion therapy. The metropolis has experienced a figure of lay waste toing inundations in recent times, with the inundations in 1988, 1998 and 2004 being the most terrible ( Alam & A ; Rabbani, 2007 ) . Quantitative appraisals of the countries inundated by these flood events revealed that in 1988, 47.1 % of greater Dhaka were flooded, while in 1998 and 2004, about 53 % and 43 % countries were inundated ( [ Dewan etA al. , 2007 ] , [ Dewan and Yamaguchi, 2008 ] and [ Dewan etA al. , 2006 ] ) . The inundations caused harm to lodging and substructure amou nting to US $ 2.2A m in 1988, 4.4A m in 1998 and 5.6A m in 2004 ( Ahmed, Gotoh, & A ; Hossain, 2006 ) . The badness of inundation harm was considerable, even in 2004, which was considered more moderate of the three inundations, and which was believed to be the consequence of hapless old termurbannext term planning and renewal and development of natural countries, such as wetlands and low-lying countries, that would otherwise hold attenuated the implosion therapy. A survey utilizing hydrological record and RS-based LULC information has shown that inundation continuance and extent has increased well as a consequence of the extended old termurbannext term development on Lowlandss and flood plains of natural river channels ( Dewan & A ; Yamaguchi, 2008 ) . It has been suggested that the exposure of Dhaka to deluge harm will increase due to continued unplanned old termurban expansionnext term ( Faisal, Kabir, & A ; Nishat, 1999 ) and the consequence of clime old termchangenext term ( Ala m & A ; Rabbani, 2007 ) , and that these in bend will increase the agony to the dwellers of Dhaka and do extended harm to belongings in the part.Data and methodological analysisData acquisition and readyingLandsat informations ( MSS, TM and ETM+ ) were acquired and used to measure LULC old termchanges and urban expansionnext term in Dhaka. Geometric rectification was performed on all the images utilizing a Landsat TM image of the same country from 1997 as mention. At least 45 land control points ( GCPs ) were used to register the images to the Bangladesh Transverse Mercator ( BTM ) system. GCPs were dispersed throughout the scene, giving a RMS mistake of less than 0.5 pels. A first order multinomial tantrum was applied and images were resampled to 30A m end product pels utilizing the nearest neighbour method. All brooding sets were used in image categorization and the thermic set was excluded. In add-on, geospatial informations including municipal boundaries, route webs, geomorphic units and lift units were used to bring forth GIS beds from beginnings such as Survey of Bangladesh ( SOB ) topographical maps ( sheet no. 79 I 5 & A ; 6 ) , municipal boundary map and geomorphic map ( Asaduzzaman, Nasreen, & A ; Olsen, 1999 ) . Multi-year socio-economic informations were obtained from Bangladesh Bureau of Statistics ( BBS ) and published literature ( [ Islam, 1996 ] , [ Islam, 2005 ] and [ Siddiqui etA al. , 2000 ] ) . Reference informations, which varied given the retrospective nature of the survey ( Table 1 ) , were used for both developing country choice and for the rating of map truth. In add-on to utilizing high-resolution imagination, intensive fieldwork was conducted in the survey country from 6 February to 22 March 2003 to roll up land truth information for the analysis of the 2003 image. A hardcopy false colour composite ETM+ ( RGB 432 ) image picturing different LULC types was used in the field to place bing old termlandnext term screen characteristics, with particular attending given to spectrally similar characteristics. Based on this fieldwork, a land truth map was prepared for turn uping preparation pels on the image and 200 mention informations points were collected utilizing a planetary placement system ( GPS ) . This GPS information was so overlaid with the image in GIS to choose developing countries and for accuracy appraisal ; 100 of the GPS points were used for trying and the ot her 100 were used for measuring the truth of the categorization. Table 1. Different informations types used in this survey.Sl. No.Type of informations usedScale/resolutionYear1 Survey of Bangladesh topo-sheets 1: 50,000 1973, 1991 2 CUS old termlandnext term usage map 1: 10,000 1975 3 FAP 8A old termlandnext term usage map 1: 10,000 1991 4 Landsat MSS image 79A m 1975 5 SPOT Pan image 10A m 1989/90 6 Landsat TM image 28.5A m 1992 7 Landsat ETM+ image 28.5A m 2003 8 IKONOS Pan image 1A m 2003 9 Municipal boundary informations 1: 50,000 2001 10 Geomorphic map 1: 25,000 1999 11 Drain map 1: 25,000 2000 12 City Guide Maps 1: 20,000 1991, 2002 13 Socio-economic informations Annually and decadala 1973-2005 Full-size tabular array aA Census records.Position Within ArticleImage categorizationA alteration of the Anderson Scheme Level I method was used to measure LULC old termchangesnext term in this survey ( Anderson, Hardy, Roach, & A ; Witmer, 1976 ) . Specifically, extra factors such as the major old termlandnext term usage classs within the survey country and differences in the spacial declaration of the images, which varied from 30 to 79A m, were considered in planing the categorization strategy. Six separate LULC types were identified: H2O organic structures, wetlands/lowlands, built-up countries, cultivated old termland, following term flora and bare soil/landfill ( Table 2 ) . Table 2. old termLandnext term use/cover categorization strategy. old termLandnext term use/Cover TypesDescriptionBuilt-up Residential, commercial and services, industrial, transit, roads, assorted old termurban, following term and other old termurbannext term Bare soil/landfill sites Exposed dirts, landfill sites, and countries of active digging Cultivated old termlandnext term Agricultural country, harvest Fieldss, fallow old termlandsnext term and vegetable old termlandsnext term Vegetation Deciduous forest, assorted forest old termlands, following term thenars, conifer, chaparral and others Water organic structures River, lasting unfastened H2O, lakes, pools and reservoirs Wetland/lowlands Permanent and seasonal wetlands, low-lying countries, marshy old termland, following term rivulets and gully, swamps Full-size tabular arrayPosition Within ArticleAll orbiter informations were studied utilizing spectral and spacial profiles to determine the digital Numberss ( DNs ) of different LULC classs prior to categorization. Training samples were selected from the mention informations and accessory information ( Table 1 ) . Sixty to seventy preparation sites, runing in size from 286 to 7800 pels, were used to develop the images. Training samples included 5-10 subclasses for each category except for bare soil/landfill. The preparation samples were so refined, renamed, merged, and deleted after rating of the category histogram and statistical parametric quantities. A supervised upper limit likeliness categorization ( MLC ) algorithm, antecedently demonstrated to obtain the best consequences from remotely sensed informations if each category has a Gaussian distribution ( Bolstad & A ; Lillesand, 1991 ) , was so applied to each image. However, several of the categories were falsely classified in the supervised categorization of LULC, with certain old termurbannext term colonies being misclassified as landfill sites due to their holding similar spectral features. Similarly, the wetland category was merged with the lowland category as it was non possible to divide them due to similar spectral belongingss, and the wetland/lowland class and cultivated old termlandnext term were besides falsely classified. Post-classification polish was hence used to better the truth of the categorization as it is a simple and effectual method ( Harris & A ; Ventura, 1995 ) . In add-on, since the old termurbannext term surface is heterogenous and composed of a complex combination of characteristics ( e.g. edifices, roads, grass, trees, dirt, H2O ) ( Jensen, 2007 ) , assorted pels are a common job when utilizing medium-spatial declaration informations such as Landsat ( Lu & A ; Weng, 2005 ) . The job of assorted pels was addressed in several ways. For illustration, thematic information ( e.g. H2O organic structures, flora, and bare dirt ) was foremost extracted from the Landsat informations utilizing the V-S-W index ( Yamagata, Sugita, & A ; Yasuoka, 1997 ) , before a rule-based technique utilizing thematic information and GIS informations ( e.g. DEM, municipal maps and H2O organic structures, etc. ) was employed in ERDAS spacial modeller to rectify antecedently misclassified old termlandnext term scree n classs. Although this rule-based technique greatly improved the MLC categorization, some misclassification between wetland and cultivated old termlandsnext term was still observed, chiefly because of the geographical adjacency of these classs. GIS tools, such as Area of Interest ( AOI ) were so applied to the informations utilizing ocular analysis, mention informations, every bit good as local cognition, to divide and recode these screens so that they more closely reflected their true categories. By using these techniques, the consequence obtained utilizing the supervised algorithm could be well improved. Finally, to cut down the salt-and-pepper consequence, a 3A A-A 3 bulk filter was applied to the classified old termlandnext term screens ( Lillesand & A ; Kiefer, 1999 ) .Accuracy appraisalBy and large, categorization truth refers to the extent of correspondence between the remotely sensed informations and mention information ( Congalton, 1991 ) . In order to measure the truth of old termlandnext term screen maps extracted from Landsat informations, a sum of 125 graded random pels were generated for the 1975 and 1992 informations and 100 pels for the 2003 old termlandnext term screen map. Accuracy appraisal of the LULC maps was so performed utilizing field informations and the geographical characteristics on old termlandnext term usage maps, high-resolution images, and SOB topographic maps, and the consequences were recorded in a confusion matrix. A non-parametric Kappa trial was besides used to mensurate the categorization truth as it accounts for all the elements in the confusion matrix instead than merely the diagonal elements ( Rosenfield & A ; Fitzpatirck-Lins, 1986 ) . The entire truth of the Landsat-derived LULC information was 85.6, 89.6 and 90 % with matching Kappa statistics of 82.7, 87.5 and 87.9 % for MSS, TM and ETM+ , severally, confirming the standard truth of 85-90 % for LULC mapping surveies as recommended by Anderson etA Al. ( 1976 ) . The application of rule-based post-classification polish was found to be effectual and improved truth by 10-12 % . The MSS image had the lowest overall truth, which may be due to its harsh spacial declaration ( Haack, 1987 ) . Yang and Lo ( 2002 ) besides noted that the jobs associated with right sorting assorted pels additions with diminishing image declaration, ensuing in spectral confusion. In this survey, spectral confusion was higher in the MSS image than in the TM/ETM+ images. old termChangenext term sensing This survey employed the post-classification old termchangenext term sensing technique, which is efficient in observing the nature, rate and location of old termchanges, following term and has been successfully used by a figure of research workers in the old termurbannext term environment ( Hardin etA al. , 2007 ) . An overlay process utilizing the GIS was adopted in order to obtain the spacial old termchangesnext term in LULC during three intervals: 1975-1992, 1992-2003 and 1975-2003. Application of this technique resulted in a bipartisan cross-matrix, depicting the chief types of old termchangenext term in the survey country. Cross tabular matter analysis on a pixel-by-pixel footing facilitated the finding of theA measure of transitions from a peculiar old termlandnext term screen category to other old termlandnext term usage classs and their corresponding country over the period evaluated. A new thematic bed incorporating different combinations of ââ¬Å" from-to â⬠old termc hangenext term categories was besides produced for each of the three six-class maps. LULC old termchangesnext term and kineticss of old termurban expansionnext term Spatial forms of LULC old termchangesnext term in the Greater Dhaka country for 1975, 1992 and 2003 are shown in Fig.A 2. In 1975, lowlands, cultivated countries and H2O organic structures were the dominant old termlandnext term usage types, and the way of old termurban expansionnext term ( herein referred to as the built-up class ) was northerly. In 1992, the built-up class replaced most of the H2O organic structures and depressions within the metropolis every bit good as the cultivated old termlandnext term along the peripheral zone. Surveies of historical maps and the available literature suggest that the depressions and H2O organic structures within the metropolis disappeared comparatively rapidly after independency as countries were developed for residential, commercial, academic and concern intents ( Siddiqui etA al. , 2000 ) . Between 1975 and 1992, when route transit from Dhaka to the backwoods was improved by the building of Bridgess over the rivers ( Islam, 1996 ) , old ter murban expansionnext term extended further to the North, north-west and to the West. Consequently, the country of cultivated old termlandnext term and H2O organic structures declined markedly during the period 1975-1992 ( Louis Berger & A ; BCL, 2005 ) . In 2003, the forms of LULC old termchangenext term revealed that Dhaka started to spread out in all waies, chiefly at the disbursal of vegetated and wetland/lowland countries. The rate of old termurbannext term invasion ( Fig.A 2 ) on other old termlandnext term utilizations increased significantly following the readying of a new Master Plan in 1995 and the development of substructure ( Siddiqui etA al. , 2000 ) . The building of a span over the Buriganga River accelerated old termurban expansionnext term in the southern and northwesterly waies. The spacial distribution of the exposed soil/landfill class is besides seeable in the maps produced ( Fig.A 2 ) , clearly exemplifying the transmutation of lowland countries to landfills on the outskirts of Dhaka. Life-size image ( 292K ) ââ¬â Opens new window Life-size image ( 292K ) Fig.A 2.A Classified old termlandnext term use/cover maps of Greater Dhaka in 1975, 1992 and 2003.Position Within ArticleThree sectors, viz. the populace, private, and individual-household sectors, are responsible for all of the old termlandnext term developments in Dhaka. Most of the old development undertakings were undertaken on an ad hoc footing by the populace sector, chiefly in countries that were antecedently used for agribusiness and that were free from flood ; illustrations of such developments include Gulshan Model Town, Banani, Uttara Model Town and Dhanmondi ( Chowdhury, 2003 ) . In recent old ages, belongings development has proliferated in Dhaka, and belongings developers have developed both wetlands and agricultural countries without any consideration of the attendant environmental costs. In add-on, single families have started to develop the peripheral countries ( Islam, 1996 ) . In the fieldwork conducted in this survey, old termlandnext term guess was observed to ho ld had a pronounced influence on the development of suburban countries. In response to increasing old termlandnext term monetary values and turning demand for lodging, Lowlandss and agricultural countries in the periphery zone are quickly going built-up by the person and belongings developers. While suburban development is a really complex procedure that is known to be influenced by a assortment of factors, including guess and old termlandnext term monetary values, these factors may non adequately explicate the procedure of suburban development in the survey country. A more elaborate survey is hence required in order to understand the assorted factors act uponing suburban development in the greater Dhaka country. Furthermore, hapless coordination among executive bureaus is besides responsible for the decrease observed in natural resources in the survey country. For illustration, in the Dhaka-Narayangonj-Demra ( DND ) undertaking, despite about 6000A hour angles being set aside for a gricultural production in the 1960s, the country has been used by local and migratory people for residential intents since 1990s without any blessing from the governments concerned. Cases such as this illustrate the deficiency of effectual coordination among the organisations involved in the planning and development of Dhaka. Analysis of the LULC old termchangesnext term in Dhaka over clip revealed a considerable addition in the built-up countries over the survey period ; built-up countries increased by 6132A hour angle between 1975 and 1992, which is an norm of more than 360A haA yra?ââ¬â¢1. Similarly, built-up countries increased in size by 4422A hour angle from 1992 to 2003, more than 400A haA yra?ââ¬â¢1, and the net addition of old termurbannext term countries over the survey period was 10554A hour angle ( Table 3 ) . When compared with other metropoliss in the part, such as Ajmer City in India, the rate of the old termurban expansionnext term in Ajmer City was 29.2A haA yra?ââ¬â¢1 over the period 1977-1989 and 32.4A haA yra?ââ¬â¢1 from 1989 to 2002 ( Jat, Garg, & A ; Khare, 2008 ) . Although urbanisation is by and large related to demographic old termchangenext term and economic growing ( Li, Sato, & A ; Zhu, 2003 ) , the nature of old termurban expansionnext term in the survey country ma y besides be associated with other factors such as topography, old termlandnext term usage, and transit. Close scrutiny of the old termchangenext term sensing statistics revealed that about 6132A hour angle of the urbanised country in Dhaka were antecedently either agricultural countries or H2O organic structures between 1975 and 1992. Conversely, 4422A hour angle of the freshly urbanized countries were antecedently flora or wetlands during the same period. By and large, two factors were observed to hold promoted old termurbannext term growing: ( 1 ) increased economic activity associated with the constitution of economic zones ( e.g. export treating zone ) and ( 2 ) redefinition of the metropolitan country. Between 1975 and 1992, reclassification of old termurbannext term countries every bit good as infrastructural development played a important function in the old termexpansion of urbannext term countries. For case, the nor'-west and southerly old termexpansionnext term of the met ropolis occurred in response to building of a inundation embankment in 1992 ( Fig.A 1 ) and a span on the Buriganga River in 2001. The spacial features of built-up countries have besides been shaped by the building of a figure of transit paths in the same period, as understood from historical map analysis and field visit. The old termexpansionnext term to the E and nor'-east led to the development of unplanned suburbs in the Lowlandss and agricultural countries that were antecedently located in those countries. Table 3. Consequences of old termlandnext term use/previous termlandnext term screen categorization for 1975, 1992 and 2003 images demoing country of each class, category per centum and country changed. old termLandnext term use/cover types197519921975-1992 country changed ( hour angle )20031992-2003 Area changed ( hour angle )Area ( hour angle )%Area ( hour angle )%Area ( hour angle )%Water organic structures 2976.1 7.2 2492.8 6.0 a?ââ¬â¢483.3 2050.9 4.9 a?ââ¬â¢441.9 Wetland/lowlands 13155.1 31.7 11646.8 28.0 a?ââ¬â¢1508.3 9124.0 22.0 a?ââ¬â¢2522.8 Cultivated old termlandnext term 12040.8 29.0 7934.3 19.1 a?ââ¬â¢4106.5 8466.6 20.4 532.3 Vegetation 6585.2 15.8 5686.7 13.7 a?ââ¬â¢898.6 3992.2 9.6 a?ââ¬â¢1694.4 Built-up 5550.5 13.4 11682.4 28.1 6131.9 16104.6 38.7 4422.2 Bare soil/landfill 1256.2 3.0 2121.0 5.1 864.8 1825.7 4.4 a?ââ¬â¢295.4 Entire 41564 100 41564 100 41564 100 Full-size tabular arrayPosition Within ArticleThe GIS analysis besides revealed that the country occupied by H2O organic structures decreased by 16.2 % , wetlands by 11.5 % , cultivated old termlandnext term by 34.1 % , and flora by 13.6 % between 1975 and 1992. Another important old termchangenext term was the diminution in wetlands and flora from 1992 to 2003. In 1992, wetlands and flora occupied 28 % and 13.7 % of the entire survey country, but by 2003, these countries had declined to 21.7 % and 5.5 % , severally. Conversely, built-up countries increased in size by 37.9 % in the period from 1992 to 2003. A little addition in cultivated old termlandnext term ( 6.7 % ) was besides observed in this period. The diminution of flora and wetlands was clearly due to intensification of old termurbannext term development in the greater Dhaka country, peculiarly through the procedure of suburban development. As shown in Table 4, there has been a pronounced old termchangenext term in LULC ove r the 28-year survey period. Table 4. Major old termlandnext term use/cover transitions from 1975 to 2003.ââ¬ËFrom category ââ¬Ëââ¬ËTo category ââ¬Ë1975-1992 Area ( hour angle )1992-2003 Area ( hour angle )Water organic structures Built-up 655.7 269.5 Bare soil/landfill 71.4 82.7 Wetland/lowland Built-up 660.0 1414.7 Cultivated old termlandnext term 2007.8 2743.6 Bare soil/landfill 416.8 492.5 Cultivated old termlandnext term Built-up 3944.3 2309.0 Bare soil/landfill 794.7 391.8 Vegetation Built-up 1725.1 1069.1 Cultivated old termlandnext term 932.4 1387.5 Bare soil/landfill 333.7 287.3 Bare soil/landfill Built-up 453.8 1047.4 Full-size tabular arrayPosition Within ArticleThe post-classification comparing of old termchangenext term sensing was carried out utilizing GIS, bring forthing old termchangenext term maps for understanding the spacial form of old termchangenext term between old ages ( Fig.A 3 ) . Table 4 shows a sum-up of the major LULC transitions, viz. ââ¬Ëfrom-to ââ¬Ë information, which occurred during the survey period. As indicated, the bulk of old termurban landnext term was acquired by change overing countries that were antecedently agricultural old termland, following term flora, H2O organic structures or low-lying countries, proposing the being of increased force per unit area on natural resources in Greater Dhaka to run into the increasing demand for old termurban land.next term Life-size image ( 247K ) ââ¬â Opens new window Life-size image ( 247K ) Fig.A 3.A Major old termlandnext term use/conversions in Greater Dhaka ( a ) 1975-1992 ( B ) 1992-2003.Position Within ArticleThe survey revealed that the old termurban expansionnext term in Dhaka has been comparatively rapid and has resulted in widespread environmental debasement. The procedure of old termurban expansionnext term in Dhaka was observed to change markedly over the old ages examined in this survey ; specifically, the metropolis expanded by 6131.9A hour angle during the 17-year period from 1975 to 1992 and 4422.2A hour angle in the 11-year period from 1992 to 2003. Landsat images revealed that old termurban expansionnext term in two periods examined in this survey did non happen equally in all waies ; new developments were observed along the fringe of old termurbannext term countries every bit good as in the countries that had already been urbanized. The rapid gait of urbanisation in Dhaka means that it has non been possible for the municipal authorities to supply basic old termurbannext term comfortss to the population, which has led to a broad scope of environmental jobs. For illustration, old termurbannext term development facilitated by old termlandnext term filling has been shown to hold a negative impact on natural home ground and biodiversity ( [ Alphan, 2003 ] and [ Dewidar, 2002 ] ) . Vulnerability to temblor related jeopardies has besides increased since a major part of Dhaka ââ¬Ës recent development has taken topographic point in landfill sites ( Kamal & A ; Midorikawa, 2004 ) . In southern Dhaka, landfills have contributed to dir ty pollution, ensuing in reduced flora ( Khatun & A ; Hoque, 1994 ) . Uncoordinated urbanisation and the creative activity of landfill sites have intensified the extent of flood in the metropolis during the moisture season ( Alam & A ; Rabbani, 2007 ) , which is peculiarly critical in the western parts of Dhaka ( Maathuis, Mannaerts, & A ; Khan, 1999 ) . Flood hazard potency has been elevated due to continued infilling of H2O organic structures, wetlands and low-lying countries ( Dewan & A ; Yamaguchi, 2008 ) . In add-on, the speed uping growing of slums is impacting the metropolis ââ¬Ës physical and human environment. Harmonizing to CUS etA Al. ( 2006 ) , the slum population of Dhaka ( about 37 % of the metropolis ââ¬Ës population ) has doubled in a decennary, to make 3.4 million in 2006 from 1.5 million in 1996. The environment of these informal colonies is highly unhygienic as they are in close propinquity to solid waste mopess, unfastened drains and cloacas, embankments, a nd along railroad lines ( Islam, 1999 ) . Consequently, the people populating in slums are highly vulnerable to inundations ( Rashid, 2000 ) and they besides suffer from an acute deficit of drinkable H2O ( Akbar, Minnery, Horen, & A ; Smith, 2007 ) .Driving forces analysisLULC old termchanges and urban expansionnext term of Greater Dhaka is governed by a combination of geographical, environmental and socio-economic factors. Although population growing is the primary cause for rapid urbanisation, the part of other causes such as economic development and physical factors besides needs to be assessed. To measure the mechanisms underlying the old termchangesnext term in LULC and subsequent old termurban enlargement, following term we performed a arrested development analysis of built-up countries utilizing selected physical and socio-economic variables ( lift, incline, population and GDP ) , and presented the consequences in Table 5. old termUrbannext term country informations were extr acted from one-year BBS statistics since RS informations merely cover three old ages. To analyze the effects of incline and lift on old termurban enlargement, following term average values of incline, and lift of both developed and developing countries in the metropolis were calculated from a digital lift theoretical account. Socio-economic informations, such as population and GDP values were obtained from the decadal and annually one-year tabular arraies of the Bangladesh Bureau of Statistics ( Table 1 ) . Table 5. Regression analysis of factors underlying old termurban expansion.next termDriving factorsCoefficientsRobust criterion mistakeTpA & gt ; A |t|Population 1.776 0.633 2.808 0.019 GDP 0.0001 0.000 4.730 0.001 Elevation 0.549 0.295 1.861 0.092 Slope 0.028 0.057 0.494 0.404 Changeless a?ââ¬â¢5.058 5.811 a?ââ¬â¢0.870 0.404 Full-size tabular array R2A =A 0.947 ; ( ProbA & gt ; A FA =A 0.000 ) ; Dependent variable: Built-up country.Position Within ArticleCensus informations indicate that the old termurbannext term population of Dhaka was merely 0.34 million in 1951, increasing to 2.6 million in 1974 with an one-year growing rate of 9.32 % during 1961-1974 ( Islam, 1999 ) . By 1981, the population had reached 3.44 million. The population reached 6.92 million in 1991 and 10.7 million by 2001 ( BBS, 2001 ) . Presently, the population of Dhaka is more than 12 million with an one-year mean growing of 5 % , compared to the national growing of 2.1 % ( Bangladesh Bureau of Statistics ( BBS ) , 2005 and [ The World Bank, 2007 ] ) . The rapid growing of the old termurbannext term population has chiefly resulted from rural-previous termurbannext term migration and estimates show that more than 60 % of people in Dhaka have migrated from rural countries ( Islam, 1991 ) . Intelligibly, this addition in the population had the consequence of i ncreasing force per unit area on the limited resource-base, and significantly contributed to the old termexpansion of urbannext term countries by glade of natural flora and infilling of low-lying countries. Table 5 clearly shows that old termurban expansionnext term is positively related to population growing. Dhaka ââ¬Ës economic development is another factor that has contributed to rapid urbanisation. For illustration, Dhaka ââ¬Ës gross domestic merchandise ( GDP ) was about 11,312 million Taka1 in 1976, 129,665 million Taka in 1992 and 162,490 million Taka in 1995. Presently, the GDP of Dhaka is 354,240 million Taka and the metropolis ââ¬Ës portion of the national economic system is 19 % ( BBS, 2005 ) . The economic development associated with the roar in ready-made garments since the 1980s has had a important impact on old termexpansionnext term of the metropolis country. This economic activity has besides resulted in a big inflow of rural-previous termurbannext term migrators in the same period ( Islam, 1996 ) . In add-on, Dhaka supports more than 40 % of Bangladesh ââ¬Ës industry, farther suggesting that the economic development and industrialisation has led to a higher rate of old termurban expansion.next term The arrested development analysis revealed that GDP exercised positive effects on old termurban land expansionnext term ( Table 5 ) . As in other old termurbannext term centres, the way of old termurban expansionnext term in Dhaka has been extremely influenced by its physical scene, peculiarly its topography. The four major rivers, swamps and depressions within and around the metropolis have ever played a polar function in the development of built-up countries in the metropolis. Urbanization ab initio occurred in the elevated countries that were non affected by inundation. Once all the elevated places had been developed, the lifting demand of old termurban landnext term has been met by the transmutation of low-lying countries, vegetated countries and wetlands. The development of wetlands, for case, has led to a significant loss of natural resources and an addition in habitat debasement. The growing of belongings developers has accelerated invasion of old termurbannext term countries on wetlands and threatens biodiversity. Two geophysical indexs were used in the arrested development analysis ( Table 5 ) and found th at lift has major influence on old termurban expansionnext term while incline has non passed the important trial.DecisionsThis survey has assessed LULC old termchangesnext term and the kineticss of old termurban expansionnext term in Greater Dhaka, Bangladesh utilizing RS informations in concurrence with socio-economic variables. old termUrban expansionnext term was quantified for the last 28 old ages utilizing the post-classification comparing technique. Greater Dhaka was found to hold experienced rapid old termchangesnext term in LULC, peculiarly in built-up/previous termurbannext term countries. Analysis revealed that old termurbannext term countries increased by 6131A hour angle during 1975-1992 and 4422A hour angle from 1992 to 2003, which resulted in a significant decrease in the country of H2O organic structures, flora, cultivated countries and wetlands/lowland. The dramatic old termexpansion of the urbannext term countries of Dhaka exhibited clear spatio-temporal differences . The transition of H2O organic structures, flora and low-lying countries to old termurban landnext term has caused extended and varied environmental debasement in the survey country, and the exposure to implosion therapy and the growing of slums have been the chief negative results associated with the rapid old termurbannext term development. old termUrban land expansionnext term has been mostly driven by lift, population growing and economic development. Integrated usage of GIS, RS and socio-economic informations could therefore be efficaciously used to understand the spatial and temporal kineticss of LULC old termchanges.next term The reading and categorization of RS informations were utile for gauging the rate and spacial form of the old termurban expansionnext term in Greater Dhaka of Bangladesh. As dependable and current informations are missing for Bangladesh, the old termlandnext term usage maps produced in this survey will lend to both the development of sustainable old termurban landnext term usage planning determinations and besides for calculating possible hereafter old termchangesnext term in growing forms.
Thursday, August 29, 2019
Price Floors and Ceilings in the Dairy Industry Research Paper
Price Floors and Ceilings in the Dairy Industry - Research Paper Example Whereas it may be convenient to assume that perfect competition exists within many markets around the world, the fact of the matter is that governments often provide subsidies and encourage price floors and/or ceilings as a manner of ensuring the domestic production capability of a given industry or enterprise. Oftentimes, this is done as a means of ensuring that the domestic production capability will remain constant; regardless of the shifts and changes in supply and demand that are evidenced as a function of a true capital market. For purposes of this brief analysis, the author will focus upon the dairy industry in the existence up price floors and ceilings that are represented throughout. Through such an examination, it is the hope of this author that the reader will come to a more full and complete understanding of the means by which these price floors and ceilings work to keep something of a static market and prices resiliently unchanged; seemingly regardless of how the market might move at any given time. The obvious rationale for these price floors and ceilings is with respect to the fact that individuals within society, oftentimes the most vulnerable, will not be in danger of being unable to afford many of the common nutritional components of a healthy lifestyle. Conversely, these price floors and ceilings exist as a way of ensuring that producers will not choose to leave the market and a relatively static level of production capability will be exhibited; due to the fact that producers are assured the fact that they will not make below a given level of profit upon each gallon of milk produced. Firstly, with regards to the social welfare theory that is aptly represented within this particular case, the price ceiling that exists denotes the fact that the individual consumer within the economy will not be expected to pay more than a given amount for a gallon of milk. This has a powerful impact upon the way in which the domestic economy operates due to the fact that a litany of different products derive their ultimate price based upon the dairy market. Whereas milk itself is the primary complement, cheese, butter, protein, way, and a litany of other substances and food products are all derived from the primary milk that exists within the dairy market itself. As such, by creating a price ceiling, secondary and tertiary producers are also given a level of assurance that the cost of production for their individual commodities will not fluctuate greatly from one period of time to the next (Dairy Industry, 2004). This ultimately serves as a type of insurance through which different food producers can rely upon the fact that even though demand for products might change, the supply and price of the compound and goods which are required to produce a given food substance are likely to remain close to if not exactly the same price as they are within the current market. Comparatively, the existence of a price ceiling within the dairy industry d enotes a level of social welfare with regards to the consumer; however, a level of subsidization and ultimate benefit also exists within this same market when one considers the price floors that exist. The price floors that exists within the dairy market are ultimately a means of assuring the producer that regardless of what shifts market takes, the producer will still be guaranteed a minimum price for each gallon of milk that they produce. This assurance allows the producers to differentiate their industry and develop in a way that they might otherwise not; if they were more concerned with the continual shifts and
Wednesday, August 28, 2019
The Strategy that The Chronicle Gazette Must Implement to Further Essay
The Strategy that The Chronicle Gazette Must Implement to Further Penetrate and Maintain Its Market - Essay Example This research will begin with the statement that one among the leading newspaper in a major metropolitan area in the United States, The Chronicle Gazette, has a paid circulation of 225 customers. It is one among the highest rated newspaper in America. In fact, its writers have been recognized and awarded for their excellent works. Despite this fact, the Chronicle Gazette is challenged by a steady decline in its customer base subscription as well as its advertising revenues. It has been observed in the past 8 years that there has been a drop of a total of 35 percent among the customer base subscription to Chronicle Gazette. As a result, its advertising revenues have also deteriorated by a total of 28 percent. This is not only true for the case of Chronicle Gazette but also valid for the cases of other huge newspapers like New York Times and Wall Street Journal. Meanwhile, this continuous decline in subscription and advertising revenues to Chronicle Gazette and the whole newspaper publ ishing industry in the United States are largely caused by the increasing dominance of the Internet. This is because the Internet has largely become todayââ¬â¢s means of news and information dissemination. Unlike newspapers, access to news to the Internet is for free. Aside from the free subscription, news accounts are indeed up ââ¬â to ââ¬â the ââ¬â minute. The Internet is certainly more advantageous than a newspaper for having also video recordings on hot topics that can be played and watched. The Internet is very fast, up ââ¬â to ââ¬â the ââ¬â minute, and has different features, unlike newspapers. Moreover, videos can be watched and more topics can be further explored by just a click on the Internet. According to Hooverââ¬â¢s Inc., there are approximately 2,000 companies that comprise the newspaper publishing industry in America today. The total annual revenues of the newspaper industry in America amount to approximately $30 billion in which majority of this earning come from the advertising revenues followed by customer base subscriptions. On the one hand, the circulation of the newspaper industry in America sums to an almost $50 million daily. Nonetheless, a constant decline in the circulation, as well as advertising in newspapers, has been observed over the past few years. This is because of the technological advancement of the Internet. People can readily access news and information any time they want for free. Internet news is up ââ¬â to ââ¬â the ââ¬â minute and can be accompanied by videos and other details with just a click on the internet. 2.1 Data on the Declining Circulation and Revenue According to the Newspaper Association of America, there is an observed decline in the circulation of newspaper copies in the United States over a ten ââ¬â year period. From the total number of 115,194,000circulated newspaper copies in 2000, it has significantly reduced to 97,712,000 in 2008.
Tuesday, August 27, 2019
European Union Law - Institutional Balance Essay
European Union Law - Institutional Balance - Essay Example Initially, the crusade was focused on centralizing the coal and steel industries of Europe for better control and protection. It was thus evident at the start that the reason for the amalgamation was economics which explains why the group was earlier created as the European Economic Community.1 Since the interrelations and interactions among the members of the community were embodied in treaties or equivalent covenants, there was a need for an adjudicatory body to ensure that the provisions and terms of those agreements between and among independent territories or jurisdictions were religiously kept and to see to it that the institutions and agencies under the Union formulate and execute acts and deeds which are legally in pursuance of those treaties and covenants. This led to the establishment of the Court of Justice of the European Union in the year 1952. The tribunal is now one of the seven pillars of the European Union and its judicial authority cooperating with the courts of the member states.2 The coordination includes matters of interpretation of the relevant laws and rules. The most important sources of law are legislation and jurisprudence, also called case law or common law. In the case of the European Union, it key institutions have legislative powers. ... even without these law-making bodies, there are already several treaties between and among member states which have been in force and effect and which necessarily become components of European Union Law. Most of these legal agreements are now incorporated in the European Union Consolidated Versions of the Treaty on European Union and of the Treaty Establish the European Community. The European Council Treaty and Protocols which was amended by the Treaties: Merger Treaty, the several Acts of Accession, the Budgetary Treaties and others also form part of the European Union Law. Secondary legislations in the nature of regulations, directives and decisions issued and adopted by the European Council, as well as international agreements for and in behalf of the Union, are also included in the whole legal framework. It is worth to note that the European Council, known today as the Council of the European Union, is composed of the representatives of the Member States who hold ministerial lev el positions. While there is only one Council, it is not a fixed institution and its designation and membership depend on the subject matter then at hand. Hence, if the issue then prevailing is about agriculture, the respective agriculture ministers will be the participants and the body will then be called the Agricultural Council.3 There can therefore also be a Council of Foreign Affairs, or of Finance, or of Home Affairs, etc. It is likewise important to observe that institutional balance is of fundamental significance in the political sphere of the European Union. No less than the key institutions of the union zealously advocate this kind of neutralization in order to conserve and maintain order, working harmony and decorum among all the branches and instrumentalities of the
Monday, August 26, 2019
Applying theories to the novel The Spirit Catches You And You Fall Essay
Applying theories to the novel The Spirit Catches You And You Fall Down - Essay Example The author dexterously manoeuvres the plot of the book so that the readers can identify with the more complex socio-psychological paradigms of the multicultural societies and the challenges that the medical fraternity has to meet to overcome the prejudices of the Hmong family. The book is fascinating in its treatment of the seemingly mundane but highly relevant issues of the different cultures and the modern society that heavily relies on science. The story of Lia Lee, a small girl who is diagnosed with epilepsy by the medical fraternity in Merced, California but which is differently interpreted by the Hmong family as ââ¬Ëqaug dab pegââ¬â¢. The intense conflict in the treatment of the little girl and the frustrations of both the girlââ¬â¢s family and the healthcare system is brilliantly captured by the author. The book throws great insight into the differing views and perspectives of the cultures that clash with the value system of the healthcare practitioners. The institutional indifference to the cross cultural values and the trials and tribulations of the immigrant family that finds itself strangely vulnerable in the alien surrounding is the highlight of the narration. The socio-psychological imperatives found in the book are of great relevance to the contemporary environment of globalization. The behavioral and cognitive theory can explain the ongoing struggle of the Hmong family that tries to work along with healthcare system towards the common goal of saving their daughterââ¬â¢s life. Cognitive science is basically an amalgamation of philosophical thoughts and scientific theories that try to rationalize the working of conscious and unconscious thoughts of a man and co-relate them with his subsequent actions and reactions. The theory of cognition, thereby, tries to explain why and how the events take place and subsequent pattern of behavior of man under certain condition involving emotional
Sunday, August 25, 2019
Judge Sotomayor and the Constitution Essay Example | Topics and Well Written Essays - 500 words
Judge Sotomayor and the Constitution - Essay Example Sotomayor is no stranger to delivering such ill conceived decisions. As such, several of her judgments have been reversed by the Supreme Court. For instance, the ruling in the Riverkeepers case depicted the extreme views that she subscribes to. Her decidedly defective decision was set aside by the Supreme Court. According to Jeffrey Rosen, Judge Sotomayor is neither a capable judge, nor is she sufficiently intelligent to function as a judge (The Judicial Confirmation Network, 2009). According to Dr. Charmaine Yoest, President & CEO of Americans United for Life, the nomination of Sonia Sotomayor to the US Supreme Court by President Obama is in accordance with the latterââ¬â¢s predilections regarding Justices of the Supreme Court. This nomination is consistent with his perception that any ruling should be based on personal feelings and political agenda; rather than the rule of law (The Judicial Confirmation Network, 2009). President Obama has dispensed with all pretence of being a post ââ¬â partisan president, with the nomination of Sotomayor. She is notorious for her innumerable failures and the patent absence of judicial restraint in her decisions. Judicial activism is essential for dispensing justice, in instances wherein the extant legislation fails to provide justice. However, it has to be borne in mind that judicial activism, per se, pays scant regard for the Constitution (The Washington Times, 2009). The principal drawback with judicial activism is that it emasculates the Constitution and supplants democratic decision making with a judgeââ¬â¢s personal penchant. Thus an unelected judge, who is not accountable to anyone, can emerge as a dangerous and powerful despot. This extremely adverse scenario is exemplified by Sotomayor and her ilk. Judge Sotomayor opines that racial and sexual disparities are not genetic anomalies, and that these differences render some people superior to others (The Washington Times,
Saturday, August 24, 2019
Global Studies Research Paper Example | Topics and Well Written Essays - 1000 words
Global Studies - Research Paper Example The imposition fact is ascertained through the investigation and study of politics in different parts of the world. While bulk of the African continent is characterized by impoverished state of existence, there are exceptions that invoke serious thinking beyond a pre conceived mind set. One of the examples given by James Robinson and Daron Acemoglu is that of Botswana- a minnow state in continent, yet its standing compared to the neighboring region is far more different in terms of the social and economic level of prosperity. Its standing in terms of the per capita income allows it a seat amongst the likes of Costa Rica, Argentina and Russia. The very near neighboring zone comprising of the likes of Congo and other names of destitute depict a sorry tale of affairs in political and economic domain. Hence it is the doing of local brain, internal assessment and administration that determine the overall outlook of a nation in terms of its success or failure. Other similar example present ed by the author is that of the Korean Peninsula. The two adjoining neighbors (South Korea and North Korea) enjoy a different level of social standing, prosperity, GDP, per capita income). The demographics of the two countries are as identical as the biological twins, yet it is the policies, maneuvering of the economic and political activity that leads to either prosperity of poverty. The same stands true on the GDP per capita income of the two nations with South Korea ranked at a position of 48 (World bank Indicators) while North Korea at the rock bottom of the list, all to the internal policies and priorities. The former adopted a policy that was people friendly, ushered economic activity, provided freedom on business fronts, incorporated businesses locally and abroad. It is the mindset within that restricts prosperity. Number of events and traces can be extracted from the era of Industrial revolution. Industrial revolution was one event in the modern history that significantly ch anged the outlook of businesses, economy and countries standing among others. However despite the effective presence of such a vibrant force of industrial revolution certain societies failed to attain the goals and fruit from the potential of industrial revolution. One of the country that stands at the top of this list is Russia. Driven by a Tsarist ruler, Peter The Great, the fear of peopleââ¬â¢s empowerment led to the distancing of technology, advancements from people. The ruling elite feared that the weapon of progress and prosperity via Industrial revolution would give people more power to act, think and respond accordingly. His power, authority, resources, brainstorming, think tank, all were vested around the strengthening of the political grip rather than cashing in on the valuable gem that had been gifted to the entire Europe in form of industrial revolution. Hence the maintenance of status quo demanded keeping the effective tool of industrial revolution from the people. T he decay process was not just limited to internal hatchery of unjust acts, rather the process of stagnation, isolation and exploitation was accomplished and aided by the external force in the form of Colonial powers intrusion into different societies. The colonial trends resulted in a visible gulf between the locals and the usurpers who had forcefully handicapped the culture and society of the locals therein. Adam Smith has invested his thoughts and research in determining the
Friday, August 23, 2019
Eat at my restaurant cash flow Essay Example | Topics and Well Written Essays - 750 words
Eat at my restaurant cash flow - Essay Example Net income values are a good indicator of the business progress. Obtained via accrual accounting, net income value shows the net profits or losses that the company achieves in the specified period. Moreover, net income values can easily be obtained from the income statement and represents the difference between all accounting revenues both direct and indirect and all accounting expenses. As matter of fact, many investors depend on net income figures to make investment decisions. Perceptibly, dividends are always proportional to net income. Therefore, if the trend of net income figure is increasing then the company can attracts investors due to expected rise of the shares. The implication is that, the firm can easily access capital, and to be precise equity, hence stands a better chance to expand. However, profitability and insolvency is not always guaranteed by positive net income figures. Note that, allow net income values could be as a result of a high expenses figure which might h ave originated from high depreciation of assets. If the value of these expenses is one time, or rather does not influence s operational saes, then the net income figure falsely predicts the firmââ¬â¢s financial status. Itââ¬â¢s to the opinion of many scholars that cash dictates financial position and thus, cash flow predicts long term profitability. Literary a positive net cash flow from operating activities implies that the business is collecting more cash that itââ¬â¢s spending and positive trend predicts a bright future.
Thursday, August 22, 2019
That which can be asserted without evidence can be dismissed without Essay
That which can be asserted without evidence can be dismissed without evidence (Christopher Hitchens). Do you agree - Essay Example They tried to prove that the correspondence truth is unknowable or unthinkable as it would call for comparison between cognition with its uncognized object which would be impossible (Net Industries, 2012). Moreover, Peire, the American Pragmatist proposed that the only way a concept can be indentified is from its practical effects of its objects. This implies that when this proposal is applied to definition of truth, a belief can only be true so far as it satisfies practicality of its objects. The fact that truth can only be sustained through inquiry implies that for truth to be indentified there has to be evidence to support such truth, which has to be practical and verifiable. However, knowledge can be attributed as evidence: to the extent that such known concept is true, inconsistency with the knowledge of an individual would amount to inconsistencies with some form of truth (Kelly, 2006). This applies to both normative and indicative evidence. Stating that smoke is the evidence o f fire implies that whenever smoke is sighted there must be presence of fire. Therefore, Hirtchens assertion ââ¬Å"that which can be asserted without evidence can be dismissed without evidenceâ⬠is true in justifying the truth. Kelly (2006) defines evidence to be the kind of thing which makes a difference in what one has justifications in believing, or what is perceived to be reasonable for one to believe. Therefore, oneââ¬â¢s justification in believing is barely a matter which can be traced to oneââ¬â¢s evidence (Kelly, 2006). This implies that two individuals with the same types of evidence would be exactly the same according to what they are justified in believing regarding a particular issue. Therefore, the main question is if believing requires evidence, and whether the object believed can be proved beyond any doubt regarding its identity and hence truth. According to Dunwoody (2009), belief is matter of judgment and decision making. Evidence is more related to fact s; evidence leads to justification in believing something as the truth. However, a fact is by itself subjective in nature as one has individual evidence to believe in a particular object, which to them represents the truth. Schmitt (2004) explains that to apprehend a fact by itself is an act of judgment and perception; this is directly related to the belief held by a particular individual. Therefore, facts which would amount to evidence that can sustain inquiry is also a belief as nothing is knowable in the world; everything is mediated by an individualââ¬â¢s senses and it is only a representation of objects in the world. Therefore beliefs are constructions of individualââ¬â¢s evidence and lead to construction of truth through consistency of these beliefs (Schmitt, 2004). Therefore, to establish the truth there are definite evidences required to support such beliefs, implying that evidence is critical in attaining any truth. According to James (1907) the truth of an idea is fa r from the stagnant property inherent within the idea, but truth happens to an idea. In other words, and idea is made true by events through a process which an idea verifies itself. The process of making an idea to be true is composed of a series of evidences, which justifies the truth in such an idea. Therefore, the fact that people seek evidence to believe or to assert the truth of a specific idea is thus correct; truth is verified through a process and by events, which constitutes a series of evide
Loneliness of Curleys wife Essay Example for Free
Loneliness of Curleys wife Essay The author never tells us the name of Curleys wife in the novel, which could be for many reasons. E. g. she wasnt important enough or even because she was a woman. But I think it was because she was regarded as one of Curleys possessions, and because of this everyone approached her with haste. They were all afraid of Curley and didnt want any bother from him so they left her alone. They didnt speak to her and ignored her most of the time which could after a while make a person very lonely and feel unwanted. She didnt like this so she tried to do something about it. She put on attractive clothes, and was heavily made up with full rouged lips and widely spaced eyes. Fingernails painted red and hair in little clusters like sausages. Obviously she wanted to attract some attention from the workers on the ranch, she just wanted somebody to notice her. But as in doing this she is labelled a tart and jailbait. George doesnt see past the outer cover when she comes back and sees a woman trying to get someone arrested or killed, so he strictly warns Lenny to keep away from her. Another reason for Curleys wifes loneliness could have been that she was the only woman on the ranch so she has no other female to gossip to, and all the men are ignoring her so she has absolutely nobody on the ranch to chat with except Curley. Curley isnt a good husband as he regards her mainly as a possession and not his wife, and therefore doesnt treat her all that well. He is one of the main reasons that she feels so unhappy. He forces his wife to stay at home alone every day as he forbids her to leave the house in fear that she might go and stray off with one of the ranch workers. He himself is not all that loyal either as he visits brothels with the other men at the end of the month even though he is married. She admits to us when chatting with Lenny that she doesnt love Curley. She only married him because of her mother. She had met a film producer that had said he was going to put her in the movies, and when the letter didnt come from him she thought her mother had stolen it. So she moved of and married Curley maybe as a way to get revenge on her mother. Whereas it is more likely that the man wasnt a film producer and probably wanted just to get her to sleep with him. When talking with Lenny she also tells him all the things she wanted in her life. She wanted to wear nice clothes, stay in big hotels, have pictures taken of her and to be an actress. She even hinted that she was going to leave Curley someday by saying maybe I will someday when talking about an acting career. Curleys wife seems awfully lonely and gets great pleasure out of talking with Lenny in the barn. She even lets him stroke her hair causing a great ruckus and eventually leading to her violent death. But it was instantaneous and when Candy looked at her body he saw that her face was sweet and young. She hadnt a care in the world. All the ache for attention and discontent were gone from her face and she was finally at peace. I personally dont think she is the cause of all the trouble because she was only seeking a bit of company. She hardly talked to anyone on the ranch for ages and when she finally gets the chance, you cant blame her for wanting to take it. It maybe is a bit her fault as she let Lenny stroke her hair, but she didnt know what he was going to do when he wouldnt let go and started to panic. She did initially get Lenny killed but I dont think she did it intentionally as she speaks no desire to get herself killed. It is a bit of everybodys fault, if the men had spoken to her she may not have wanted to go into the barn with Lenny and therefore not have been killed. Lenny and Georges dream may have came true if Curleys wife had not been killed so in a way this major event changed all of their lives forever. 30/04/2007 Simon Gurney Show preview only The above preview is unformatted text This student written piece of work is one of many that can be found in our GCSE John Steinbeck section.
Wednesday, August 21, 2019
The Benefits Of A Multi Sensory Approach
The Benefits Of A Multi Sensory Approach R. Q. 3: What will be the views of the three teachers with respect to the practicality or continued use of the multi-sensory approach based on the results of the test scores after the completion of this study? Teachers views on the benefits of a multi-sensory Approach to that of a traditional Approach. The researcher first starts with the perspectives of the three teachers who states that by tapping into the different senses, educators can create a more concrete and complete learning experience for all learners. Teaching learning concepts using two or more of modalities or learning styles at the same time, means that teachers are delivering a multisensory approach to all students in their classrooms. It is the observation of these teachers that as educators some of us may think or feel that multisensory methods or approaches are only useful for students with special needs, however, research has shown that almost all students and teachers can gain great benefits from a multisensory approach in the teaching and learning process. Whats more is that research has also shown that once teachers are using a multisensory approach to learning they are ensuring and addressing all learning styles and needs of their students. Thus one can be sure that every student in his or her classroom is specifically catered for or to. It is also the view of both the researcher and teachers in this study that all students benefit from a multisensory approach to learning, not just special education students. Every child processes information differently, and this teaching method allows for each child to use a variety of their senses to understand and process information. The three Teachers also stated that by providing classroom activities that utilize various senses, they have notice that their students learning attention increases which makes and caters for an optimal learning environment. Research shows that by using varying teaching strategies teachers can address all sensory preference and increases learning regardless of the individual students primary preference (Thomas, Cox Kojima, 2000). Another research also shows that by using multisensory strategies, teachers can engage and sustain the attention of all students. By employing a variety of strategies the teacher may address the mixed efficiencies of those students as well as the dominant and secondary preferences of others. Thus, they reinforce strong preferences and strengthen weaker ones (Silver et al., 2000;Haggart 2003). Key benefits of the multisensory approach are noted by the three teachers and researcher: Increased learner engagement Generating a greater capacity for learning Encouraging a greater knowledge transfer Improved attitudes towards learning Greater student achievement One of the teachers in this study said to me during the interview and I quote I had a great feeling of relief when I began to understand that a youngster (student) needs more than just subject matter. Oh, I know mathematics well and I teach it well. I used to think that was all I needed to do. Now I teach the students, not math. The researcher notes that as teachers, we should know that students learn differently. Some prefer to learn by doing. Others like to watch a demonstration of what they need to do. Some wants to listen to what is expected. Most students appreciate a combination of methods: a little bit of doing it, a little bit of seeing it and a little bit of hearing it. When teachers teach using a combination of methods that appeal to different learning styles (Kinesthetic, tactual, auditory and visual) they are using a multisensory approach which benefits all students involved by equipping them with different learning styles and catering to their development needs. Effective teachers make a conscious effort to design instruction that incorporates a broad variety of learning preferences beyond their own (Doolan Honigfeld, 2000; Sadler-Smith Smith, 2004) Varying teaching strategies to address all sensory preferences increases learning, regardless of the individual students primary preference (Thomas, Cox, Kojima, 2000)Using multisensory strategies, teachers can engage and sustain the attention of all students. However, it is important to note that like most students remember 20% of what we read, 30% of what we hear, 40% 0f what we see, 50% of what we say, 60% of what we do and 90% of what we see, hear, say and do. Therefore, it is not always possible to provide all four elements but it would be useful to audit teaching approaches and consider how many elements are present all three teachers noted. Maria Montessori was the pioneered of this approach (multisensory approach) in the early twentieth century with young children, who naturally learn by seeing, hearing, touching/feeling, tasting, and smelling. The researcher and teachers feel that multisensory teaching is effective and useful at any age. However, age-appropriate resources for secondary students and adult learners have been almost impossible to source. Until now. We really do believe that multisensory teaching techniques coupled with the use of Axis Hands On resources offers all students a Better Ways to Learn. In concluding, the researcher and teachers have also noted that more recent research has shown that the more senses (multisensory approach) we incorporate into the learning process the more efficient learning becomes for all types of learners. Rhonda Farkus (2003, The Journal of Educational Research, Vol 97, No. 1) states, The power of evidence supporting the benefits of (multisensory approach) learning-style methodology is compelling. Teachers have also noted that achievement test scores of students taught using their preferred modalities in this study are statistically higher (multisensory approach) than of students who were not taught using their favored learning modalities (traditional approach). Moreover, when students are taught with multi-sensory approach instructional resources, (although initially through their most preferred modality), scores further increased. Therefore, teachers in this study have also observer that a multi-sensory approach is a powerful tool for reinforcing language Arts teaching in three important ways. First, it helps get the information across. Second, it helps the students process the information. And, third, it helps students more easily retrieve information already learned. Using a variety of senses simply opens up more doorways into the brain. Teachers views on the challenges of Multisensory Approaches As educators we spend a great deal of our time thinking, talking, and learning about how to best teach our students essential spelling, writing and reading skills. You can be sure the conversation between two or more educators will eventually include the topics of learning styles, multi-sensory teaching, hands-on activities and even traditional approaches. Unfortunately, confusion (and sometimes conflict) can occur when these terms are used because they have multiple and overlapping definitions. The main problem teachers may encounter is that there are too many meanings in common use for the term learning style. The original use of this term refers to the sensory pathway or modality through which students find it easiest to learn. There are four generally recognized sensory modalities: visual (sight); auditory (hearing); tactile (touch); and kinesthetic (movement). It is the belief of all three teachers interviewed that it is very vital for teachers to understand that different learning style encompasses a much broader look at how our students approaches learning situations and tasks and this must often include a complete profile of how our students functions as a learner. In addition to preferred modality, some of the areas profiled must be optimal learning environment (such as best time of day, lighting, temperature and noise level), how his/her personality effects his motivation (such as the need for or avoidance of competition), his/her natural areas of competencies or i ntelligence and so on. The teachers who are part of this study feels that by tracing a word with the tip of ones (students) fingers or feeling the shape of the word is vital to helping the tactile learner master his/her writing, reading skills and spelling words. In this regard, adding pleasant textures or sensations creates a stronger neural impression of the words. Thus in the past, (a traditional approach) tactile and kinesthetic learners were often lumped together. However, some of the most current research on how the brain functions shows that two distinct and separate areas of the brain are responsible for storing these two types of sensory input. The researcher strongly believes that armed with such information listed above, it may be tempting to assume that teachers should determine their students favored learning mode and then teach him/her accordingly. This would be a mistake. Teaching using only one learning modality (traditional approach) could result in the neglect of important reading, writing and spelling skills. Proofreading is an example of an essential reading, spelling and writing skill that is primarily visual. It is a skill that does not come naturally to a non-visual learner. It is the teachers view in this study that is for students to become competent and excellent proofreader, we as teachers must help them to develop excellent visual discrimination skills (multisensory approach). Students must be taught to look at the whole word in isolation, with special attention to its shape or the outline of the word. He/she must also look carefully at the word syllable by syllable to see if there are any peculiar combin ations of letters, unexpected spellings or any silent letters used to spell the word. Finally, students must be given a systematic approach to proofreading his own and others writing. It is therefore, the researchers and teachers view in this study that the use of a multisensory approach and not a traditional approach will best assist and develop our students early and latent language Arts abilities which will prepare them adequately for life and the future. The teachers in this study also feel that our students dominant learning modality may also have developmental implications if not deal with in a holistic way more so in a multisensory approach. For example, very young children are known to learn mainly through auditory modalities; early school-aged students (kindergarteners) tend to use more kinesthetic and concrete avenues; and as a student nears adolescence, they tends to rely more and more on the abstract and analytical reasoning along with their visual recall. Skills taught using only one learning modality ( as that in the traditional approach)may need to be retaught using another modality as students enters each new developmental level and begins to depend more on other learning modality (multisensory approach) to store and retrieve information. Teaching using (a multisensory approach) allows for multiple learning modalities which in turn eliminate inefficiency. For this reason a multisensory approach and not a traditional appro ach is the best technique and strategy for teaching phonic and the alphabet awareness skills to kindergarten students. Therefore it is this researchers view that research has consistently shown that use of a multisensory approach to the teaching and learning processes are critical for all students and students more peculiar those who have moderate to severe learning disabilities. In the mid-1920s, Dr. Samuel T. Orton and his colleagues Anna Gillingham and Bessie Stillman, first began using multi-sensory approaches with his dyslexic students. Orton was influenced by Grace Fernald and Helen Kellers descriptions of the kinesthetic methods used by Dr. Maria Montessori at the 1915 Panama-Pacific Exposition at San Francisco. Orton correctly theorized that Montessoris use of kinesthetic reinforcement of visual and auditory associations would correct the tendency to reverse letters and transpose the sequence of letters his dyslexic students made while reading and writing. Their programme, which includes multi-sensory learning as well as other important concepts, is commonly called the Orton-Gillingham approa ch. Teachers view on the actual implementation of Multisensory approach. In light of the positive results that this programme had produced in terms of students alphabet and phonemic awareness skills when taught using a multisensory approach in comparison to a non-multisensory approach. As a result all three teachers expressed their interest in continuing the use of the Multisensory Approach. Summary The focus of this chapter was the presentation of data collected in this study. The quantitative, qualitative and quasi-experimental data were present using narratives, graphs tables and charts. The data revealed that the reactions to a multisensory approach from both students and teachers were generally positive.
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