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2427 Uppsatser om Population models - Sida 32 av 162

Behovsstudie av ett energibutikskoncept för energiförsörjning utanför elnät : ? En småskalig fältstudie i Namibia

The amount of electricity is limited in Namibia and the large distance between towns andvillages complicates the energy supply in the country. Therefore an alternative way to provideaccess to appropriate energy technologies is needed. The Government of the Republic ofNamibia (GRN) has adopted an approach of helping off-grid households by establishing EnergyShops in each region in Namibia and these shops are going to sell basic renewable energy andenergy efficient products. The Renewable Energy Efficiency Institute in Namibia (REEEI), theinitiator of this thesis, is coordinating the establishment of these Energy Shops.The main purpose of this thesis was to examine the needs of energy products for the Namibianpopulation and develop an assessment method for the Energy Shop in how to select appropriateenergy products already on the world market. The purpose was also to develop a method forchoosing an Energy Shop.

Klassiska populationsmodeller kontra stokastiska : En simuleringsstudie ur matematiskt och datalogiskt perspektiv

I detta tvärvetenskapliga arbete studeras från den matematiska sidan tre klassiska populationsmodeller: Malthus tillväxtmodell, Verhulsts logistiska modell och Lotka-Volterras jägarebytesmodell. De klassiska modellerna jämförs med stokastiska. De stokastiska modeller som studeras är födelsedödsprocesser och deras diffusionsapproximation. Jämförelse görs med medelvärdesbildade simuleringar.Det krävs många simuleringar för att kunna genomföra jämförelserna. Dessa simuleringar måste utföras i datormiljö och det är här den datalogiska aspekten av arbetet kommer in.

Population i isolering : en inventeringsutvärdering

Under 2005 och 2008 inventerades förekomsten av större vattensalamander(Triturus cristatus) i Gävleborgs län. Ett till synes isolerat fynd gjordes väster om Hofors. Inventeringarna utfördes med flaskfällor och visuell observation och lokaler valdes via kartblad enligt kriterier på vattenytans areal, rörelse och distans till väg. Syftet med detta arbete var att undersöka huruvida den observerade isoleringen var faktisk eller endast ett resultat av den använda inventeringsmetodiken. Detta arbete baserades på en radie kring en känd population där radien baserades på spridningsdistans, mognadsålder samt tid sedan den förra studien. Lokaler valdes sedan ut inom radien med krav på areal vattenyta och förekomsten av stillastående vatten varpå inventeringar utfördes med flaskfällor.

Bilfri stadskärna i Borås - Utopi eller framtid?

The purpose of this study is to examine the view of Swedish language teachers on the role of fiction and of school libraries within the compulsory school?s teaching of Swedish of form 6-9. The questions to be answered are:? What part do Swedish language teachers (hereafter called teachers) think fiction is playing regarding the pupils inclination to read and reading promotion?? What is the attitude of teachers regarding the function of fiction in the Swedish subject?? What do teachers consider being the role of the school library in education, and can this be related to the local school library resources?To answer the questions a questionnaire was sent out to thirty-five teachers. Four qualitative interviews were also carried out among the fourteen teachers that answered the questionnaire.

Utveckling av mobiltelefonapplikation för kommunikation i ad-hoc nätverk med Bluetoothteknik

The purpose of this thesis is to develop an application for mobile phones that simplifies communication. The company Doberman wanted to look at possibilities to develop such an application that uses Bluetooth? technol-ogy to communicate in ad-hoc networks. The aim has been an application to run on mobile phones in which you can send messages and files to other devices and also add a user profile with personal information to share with others. The communication will take place in temporary networks created when Bluetooth enabled devices is in range of each other.The market for mobile phones has grown rapidly over the past years and is still growing.

"Säg mig vad du äter och jag ska säga vem du är" : En kvantitativ studie om efterfrågan av hälsosamma livsmedel

Obesity and overweight are today classified as one of the largest epidemics in the Western world and is threaten a large part of the population. As a reaction to this a major health trend has emerged in recent decades. Every day consumers are exposed to information from the media about what is healthy or unhealthy to eat and the recommendations change frequently.There is great interest in healthy food on the Swedish food market, but still healthy foods only represents a small proportion of the total food sales. The essay examines the gap between the current and potential demand for healthy food and if it can be explained by any of the following factors: lack of information, price, taste or cognitive behavioral.To study these questions a quantitative method have been used and 213 questionnaires were collected. The intention is to draw general conclusions about the entire population.

På tu man hand : Pedagogers uppfattningar kring arbetet med elever i behov av särskilt stöd

The purpose of this essay is to describe the organization of the Swedish Animal WelfareAgency during the time it was in operation. The Swedish Animal Welfare Agency was established in 2005 by the government who saw it as necessary in order to strengthen the protection of cruelty to animals in Sweden. However, the agency was shut down already in2007 and its responsibilities as an agency was moved back to the government and the department of agriculture. During its time in operation, the Swedish Animal Welfare Agency, received much criticism, among other things because of its interpretations of the law which were seen as too focused on details and thus ?bureaucratic?.

Folkbibliotek som mötesplats för flyktingar : En undersökning av två folkbibliotek och deras potential att öka socialt kapital i samhället

This essay points at the importance of public libraries as arenas of meetings between refugees and the local population, and by this - creating social kapital in the society as a whole. The researchers Aabø, Audunson and Vårheim have created theories about low-intensive meeting places, that means ? neutral, public places where accidential meetings with different strangers can happen, which can create social capital and trust among each other. To complement these theories I also use Vårheim who have implementet social capital-theories to the sphere of public libraries. These two theories complement each other and can help me investigate two public libraries in a rural area in Sweden.

Flodpärlmusslans status i Laxtjärnbäcken : Effekter på flodpärlmusslan av sedimentbelastning och förekomst av bäckröding

The aim of this present study was to determine and evaluate whether the presence of brooktrout (Salvelinus fontinalis) and sediment load may be a threat against the reproduction anddistribution of freshwater pearl mussel (Margaritifera margaritifera) in a creek located innorthern Sweden. Freshwater pearl mussel is an endangered species and is dependent ofbrown trout (Salmo trutta) to reproduce. Therefore there are concerns of indirect effects onthe population of pearl mussel by competition between brown trout and brook trout. Ditchesfrom a nearby gravel road have been fixed to lower the sediment load into the creek. I tried toevaluate this action plan.

Grey-sided vole and bank vole abundance in old-growth forest patches of different size and connectivity

Vole populations in northern Scandinavia vary in cycles with peaks every third or fourth year as described by the National Environmental Monitoring Programme of small mammals (NEMP). Some vole species have declined in population numbers since the NEMP started in 1971, especially the grey-sided vole (Myodes rufocanus) which is nearly extinct in the forested region. Since small mammals are an important food source for several avian and mammalian predators, the decline in vole numbers is expected to have consequences for the whole food chain, especially if other vole species start to decline in numbers. This study tried to test the hypothesis that presence and abundance of M. rufocanus (a specialist species) and Myodes glareolus (a generalist species) can be predicted by patch size and connectivity of forest patches >60 years old with a minimum of 15% pine >100years old.

Small-worlds och rich-clubs bland bloggar : En nätverksanalys av den svenska bloggosfären under FRA-debatten 2008

Purpose/Aim: To find power structures within the blog network.Material/Method: Using keywords to find all available blog posts about the National Defence Radio Establishment from the blog search engine Twingly, and thereafter using the same blog search engine to find inlinks from other blogs, to those posts. The data is set into the context of the small-world networks models of Duncan J. Watts and rich-club models of Sergi Valverde och Ricard V. Sole.Main results: 5183 unique blogs have written about the subject in 22779 blog posts to which 28128 inlinks from other blogposts are made. Just over one fifth of the blogs are linkted to each other in one big network, where the remaining blogs stand without any ingoing or outgoing links.

Mobilannonsering: Hur ett värdenätverk formas kring en ny mediekanal

Mobile telecom and the Internet are converging, which opens new possibilities for market actors to create business through the mobile handset. At the same time market experts are predicting that mobile operator?s existing dominance in the telecom market will in the future decline as new technology such as VoIP and services will erode the operator?s traditional revenue model. This implies that mobile operators will need to rethink their dominant business logic to create new value for their customers. Mobile operators are aiming to expand their existing revenue model through advertising in the mobile handset and are searching to create new business models that evolve advertising sales.

Integrationen av etniska minoriteter i de tre Baltiska staterna

This essay is a comparative empirical study of ethnic integration mainly of the Russian-speaking minorities in the three Baltic states (Estonia, Latvia and Lithuania) in a post-communism setting. As Lithuania has a Polish minority that is as large as the Russian-speaking, they too shall be included in the study but not as thoroughly as the Russian-speaking minority. Thus the problem is: to what degree are the ethnic minorities integrated with the titular nations in Estonia, Latvia and Lithuania? In order to study ethnic integration I have set up a theoretical framework largely based on Weiner?s theory of integration. The theoretical framework focuses on three dimensions: Citizenship, Identity and Segregation.

Den svenska lapphunden - en ras i behov av förändring?

Many pedigree dogs are suffering from inherited diseases or personality disorders caused by selective breeding. The Swedish lapphund is a breed that has been suffering from some loss of genetic variation due to the heavy use of only a few males. Concerns have arisen and crossbreeding has been discussed as a way to manage gene loss. Four breeds has been taken into consideration for this purpose; schipperke, finish lapphund, Norwegian buhund and Norwegian elkhound, black. These breeds has been tested theoretical by a comparison of mentality and health.

Upplevelser av att arbeta med djur på daglig verksamhet : En kvalitativ intervjustudie bland personer med funktionsnedsättning

The central part in all public health work is health promotion and disease preventing actions among the population. Since all public health work includes the whole population, the work has to embrace disabled people as well. Within the disability policies, participation and equality are important goals, which illustrate the importance of a job. In previous studies the positive effects of animal have been detected among persons with disabilities, by better balance, better mobility, larger social network, new knowledge and most of all happiness. The aim of this study was to investigate how people with disabilities experience their health when they are working with animal husbandry at daily activities.

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