The Swedish processor Findus contracts approximately 500 pea producers annually to secure the company?s supply of green peas for human consumption. A production contract, which has had roughly the same design for decades, regulates the relation between Findus and the pea producers. Agriculture is typically a risky business. The main sources of risk in agricultural production are production risk and price risk.

This work deals with mathematics teaching in preschool classes. The purpose of my study is to investigate the preschool classes? teachers' aspirations for the children learning mathematics in two different preschools. To achieve my goal, I formulated the following questions to be explored and answered through interviews with five teachers.  Does mathematics in preschool classes have a prominent role in educators' planning? What perception do the educators in the field have about the learning and teaching of mathematics in the preschool classes? How do the teachers understand their own work with mathematics in preschool classes in relation to multilingual students?                                A qualitative interview method was applied.

A debate in finance is whether a random investment gives the same return as carefully choose and valuing an amount of shares to invest in. Stock valuating Stock valuation is often done by fundamental valuation models, based on the company's underlying character, which tries to put a correct price on the stock. Today there are several different valuation models that can be used for this purpose. Since valuation models are only mathematical, equity research is underpinned by more subjective assessments about the company and its future.The purpose with this thesis is to describe which valuation models that are used by professional stock analysts, but also to see if the reliability on the equity research is affected by the used model to valuing the company. Furthermore, we want to see if the job that?s been done to understand the company, measured by the equity research quality, impact the reliability on the equity research.In this thesis, we have, to achieve our purpose, conducted a quantitative content analysis of 164 equity research done by professional analysts at firms listed on the Stockholm Stock Exchange. With basis in previous research, we have developed a method for determining the valuation model that is used in the equity research, the reliability on the equity research and a framework for assessing the quality of the equity research.In the theoretical framework the valuation models involved in our study are described, previous research on the reliability on the equity research and their practical use.

This Master Thesis is a product development project that has been carried out in cooperation with Scania CV AB. The purpose has been to find the relationship between geometric parameters and the swirl number for an XPI- cylinder head in order to improve the design specification.The increased focus on environmental issues from society leads to tighter emission legislations for the truck manufactures. In order to drive the development forward considerable resources are spent on research and development on diesel engines and its combustion process. The inlet air has a significant impact on the formation of emissions and the flow that is desired is called swirl. Swirl is achieved by making the air rotate around the vertical axis of the cylinder.Earlier cylinder heads that has been developed at Scania CV AB have shown clear relationships between geometric parameters of the cylinder head and the swirl number.

Ocean Thermal Energy Conversion, OTEC, a technology using the temperature difference between cold deep seawater and warm surface water, can extract the work in the form of electricity. OTEC gives also synergies of drinkable fresh water. The temperature difference has an impact on the efficiency of the technology, which means that the feasibility of OTEC is geographically limited. The project intends to explore the possibility of replacing the atoll Tarawa?s present electricity generation with an OTEC plant and to explore synergies. In the present situation all of Tarawa?s electricity is generated by fossil fuels.

Ocean Thermal Energy Conversion, OTEC, a technology using the temperature difference between cold deep seawater and warm surface water, can extract the work in the form of electricity. OTEC gives also synergies of drinkable fresh water. The temperature difference has an impact on the efficiency of the technology, which means that the feasibility of OTEC is geographically limited. The project intends to explore the possibility of replacing the atoll Tarawa?s present electricity generation with an OTEC plant and to explore synergies. In the present situation all of Tarawa?s electricity is generated by fossil fuels.

In this report the two authors, and project contributors alike, describe their work withdeveloping a solar cooker intended for usage in the developing countries of the world.Specifically, the work aims at developing a new, solar heat driven cooking device, possiblybased upon the current product. This should, in comparison to the current product, be lighter,easier to transport and to produce. Also, the new product?s production mustn?t be more costlythan today and the included materials and components must be obtainable from within theBolivian national borders where the product is currently produced. During the project, certainadvantages with a more efficient, and, above all, a more moderately priced product, werediscovered.

Syftet med detta examensarbete är att fördjupa vår förståelse kring matematikspråk och kommunikation som verktyg i matematikundervisningen. Detta har sökts svar på genom att observera och intervjua tre stycken matematiklärare i grundskolans lägre åldrar. Vi har undersökt hur dessa lärare använder och ser på muntlig kommunikation samt infor-mellt och formellt matematikspråk. Vi redogör för tidigare forskning kring språk och kommunikation i matematikundervis-ningen. Studiens utgångspunkt är Vygotskijs syn på språk och kommunikation i ett so-ciokulturellt perspektiv.

Syftet med detta arbete är att undersöka pedagogers och barns samspel i relation med matematiska begrepp och ta reda på vilka matematiska begrepp som blir synliga vid aktiviteter inomhus i en förskoleklass. Arbetet är både en kvantitativ och en kvalitativ undersökning. Strukturerade observationer och intervjuer används som undersökningsmetoder. Intervjuerna kompletterar observationerna för att ta reda på pedagogers syfte med aktiviteterna och hur medvetna pedagoger arbetar. Dessutom jämförs observationerna och intervjuerna i analysen. Studien visar att pedagogerna har en stor betydelse i barnens matematiska begreppsutveckling. Språket är hjälpmedel för att kunna påverka barnens tankar mot utveckling och barnens användning av matematiska begrepp är beroende av hur ofta pedagogerna uttrycker sig med hjälp av matematiska begrepp.

Syftet med studien var att ta reda på vilka strategier elever väljer när de ska lösaett matematiskt problem. Vi genomförde en observation och nio individuellaintervjuer med elever i årskurs 3. De fick lösa ett matematiskt problem somobserverades. Utifrån elevernas lösningar genomförde vi sedan intervjuer för attta reda på vilka strategier de valt att använda för att lösa problemet. Resultatet avelevernas lösningar visade på flera olika lösningsstrategier.

Stage-discharge equations for lakes without disharge measurementsSimon AnderssonIn 2015 all lakes, rivers, coastal water and groundwater should be of good ecological statusaccording to the water framework directive from the European Union. In the process ofimproving the quality of Swedish water bodies, knowledge of where problems occur isneeded in order to utilize the resources optimally. The ability of lakes to store water is animportant factor since it controls the flow of water through the country. A stage-dischargeequation is a mathematical relation between discharge from a lake and its water level. Bybetter understanding of stage-discharge equations for lakes, their storage capacity can bedescribed better in hydrological models.This master thesis aims to evaluate methods for determining stage-discharge equations forlakes where a variable amount of field measurements is available.

Nynas produces bitumen at two refineries in Sweden. The bitumen is shipped to seven depots along the swedish coast line, and from the depots special trucks handle the transportation to customers. Recently Nynas has transformed its supply chain and closed down a few depots. At the moment the company is considering a further reduction of the number of depots. In connection to these discussions an analyse of the companys distributionsystem and of possible changes is required.

This study analyses the economic consequences due to ethanol production in Eastern Sweden. The analyses consider the cooperative and the farmers as one vertically integrated company. The area that found the market in this study is illustrated in figure 1. The analyses assume that all members act jointly with the objective of maximizing joint profits at the farm level as well as at the cooperative firm. A mathematical model is created to calculate the optimal use of arable land.

Både från politiskt och akademiskt håll betonas betydelsen av matematiskt partikulärspråk för barnsmatematiska kunskapsutveckling. Syftet med föreliggande studie är att studera hur förskolelärare och barn konstruerar matematiska begrepp i en förskolekontext. Arbetet tar avstamp i sociokulturellt och kulturanalytisk teori. Data har konstruerat genom att jag som forskare har följt och samtala med en lärare i förskolans verksamhet. Det empiriska materialet har dokumenterats med fältanteckningar och filminspelningar, totalt omfattar filmmaterialet ca 8 timmar.

Background: Investors have several options to choose from when the goal is to achieve the highest yield at the lowest cost and risk. Stocks are a common investment options, but is also associated with risks. Portfolios are usually constructed with several different assets to reduce the unsystematic risk of investment. Funds are similar to composite stock portfolios, the big difference is that they dealt with in their entirety and investors may not affect the fund's content. The problem remains that whether you choose stocks or mutual funds there is still uncertainty as to how the future will unfold.