Objective: The aim of the study is to describe pupils' understanding of the mathematical concept of function. How do pupils define the concept of function? What images of the concept of function evoke when they solve tasks, which involve identifying and constructing functions?Theory: A student's thinking about a mathematical concept depends on more than just the formal definition of the concept; therefore Tall and Vinner introduce the term concept image to describe the role cognitive structures play when students learn about concepts. The cognitive structure includes all mental images, associated properties and processes that an individual associates with a given concept. According to Sfard, an individual's understanding of mathematical concepts may have different character: an operational conception, where a concept is conceived as a process and a structural conception, where the given concept is conceived as an object, that is, as a whole.Method: 16 pupils at the Science Program at two different upper secondary schools inSweden answered a questionnaire on the mathematical concept of function.

This master thesis examines the development of the two earlier independent IR protocols Z39.50 and SR (Search and Retrieve, ISO 10162/10163), now Z39.50/SR, from the beginning of the 80s to 1996 and their functionality in the client/server environment.Z39.50 applications in library systems will allow easy access to information regardless of platform or location. The use of Z39.50 will create a new user environment. Almost all the library systems of the market support the Z39.50 and surprisingly the use of it in Sweden lied on a very low leve! in 1996. This thesis was followed-up by an interview and a questioner among the Swedish Z39.50 users. They could see a huge potential of development concerning the future IR process.

Sweden has a natural gas grid extending along the west coast, from Trelleborg to Stenungsund. There are also several smaller local networks where a planned natural gas pipeline from Skutskär to Hofors prompted the need for a comprehensive study. This study examines the linkages that exist in terms of technology and market of natural gas and biogas in Sweden. Sweden has set high targets for the future with ambition to become independent of coal and oil as energy sources. Since 1985, a part of the solution has been import of Danish natural gas.

This thesis investigates how a developer can move a desktop application to the web environment. The investigation also includes finding out what are the limitations of a web application and what is not possible to move to the web from the desktop. The question is whether there is any functionality that is gained or lost in the web application after the move.A survey has been conducted to find out what types of problems occur when moving an application from desktop to the web. The authors of this thesis have developed two prototypes for a company who wants to move a limited part of their current desktop application to the web in the future. The prototypes have been developed in Silverlight and ASP.NET.The survey has revealed that one of the disadvantages of web applications is the difficulty in working with local files and hardware on the computer.

To automate software testing is an investment, and that makes it important to have good knowledge about automation before an implementation is made. In this master thesis a study about automated testing is carried out. The study also includes a closer look at the testing tool TestComplete. TestComplete is one out of many tools on the market that is developed for automated GUI testing and the goal is to get a picture of how well the tool can adjust to CC Systems own applications. Studies show that it is hard to write lasting test scripts.

Resultatet av vår undersökning visar att föräldrar med en högre utbildning i större utsträckning deltog mer aktivt i valet samt i högre grad påverkade sina barn i deras val än föräldrar med en lägre utbildning. En tendens som vi kan se är att en majoritet av barnen själva letade upp den skola som de ville gå på. Det som var viktigast i valet till gymnasieskola var att skolan hade det önskade programmet och en speciell profil som bidrog till barnets utveckling. Att gymnasiet var centralt beläget och att det var en mindre skola med god skolmiljö upplevdes även det som viktigt..

Today, the TV vignette is considered an embellishment to a TV program, despite its broad audiences and unique appearance. We wanted to find out if the television vignette has some common features and conventions but also find out how it relates to genre.We used a case study where we analyzed ten vignettes that we chose from certain criteria. We used a model based on image analysis that we modified to fit our needs. The main parts of each model consisted semiotics, imagery, dramaturgy and sound.We also made a couple of interviews with people who are active or used to work with vignettes. As a result we discovered that the television vignettes consist of certain conventions and that the vignette will not be considered as an independent genre, until the public has accepted it.

This essay studies stylistic differences as well as homage?s between four films produced in two different contexts, New Hollywood and alternative aesthetics today in America. This is done in order to answer the question how alternative Hollywood works against or with Classical Hollywood Cinema in cases like style and narrative. The Work is done by a theory of neoformalism and the definition made by them of Classical Hollywood Cinema. The essay finds small changes, although kind of important witch are mainly shown in editing and causal motivation.

I detta exjobb har en testplattform skapats för att kunna testa, utvärdera och jämföra olika pumpstyrningar i torr miljö. Testplattformen består av en simulerad pumpstation till vilken befintliga pumpstyrningar av valfri modell kan kopplas, det vill säga ett Hardware-In-the-Loop-system. De främsta fördelarna med en sådan plattform är flexibilitet, snabb feedback samt möjligheten att återskapa exakt samma förutsättningar för olika pumpstyrningar.Testplattformen har implementerats i LabVIEW på en PC som kommunicerar med pumpstyrningshårdvara via ett I/O-kort för analoga och digitala signaler.Det simulerade systemet konfigureras genom val av bland annat pumpar, pumpsump, inflöde och rörsystem. Utifrån de inmatade värdena och styrsignaler från pumpstyrningen simuleras sedan bland annat systemets flöden, energier och temperaturer. Nivån i sumpen, och övriga insignaler till pumpstyrningen, återkopplas från simuleringen.

The usage possibilities of mobile platforms and smart phones are increasing rapidly as they provide support for better processors, sensors and communications capabilities. This has for many companies resulted in an increased interest to explore the possibilities of mobile platforms and how they can be integrated in various business areas. As the usage of mobile platforms in industrial applications is a new area, it is difficult for companies to estimate their potential, and what contributions the different platforms can give.This master thesis investigates the possibilities and limitations for the consultant firm Combitech when integrating mobile platforms and handheld devices in industrial applications. This is accomplished through a comparison between the platforms and by considering the possible areas of use for the mobile platforms based on experiences from companies and research in the area.For a company with the intent to deliver services that use mobile platforms, it is important to be able to combine expertise and resources to effectively attract customers. The mobile platforms will, if applied right, give great possibilities in industrial applications as a cost-effective alternative for both hardware and software solutions for businesses, which provides an opportunity to sell services to both established and new clients.

The usage possibilities of mobile platforms and smart phones are increasing rapidly as they provide support for better processors, sensors and communications capabilities. This has for many companies resulted in an increased interest to explore the possibilities of mobile platforms and how they can be integrated in various business areas. As the usage of mobile platforms in industrial applications is a new area, it is difficult for companies to estimate their potential, and what contributions the different platforms can give.This master thesis investigates the possibilities and limitations for the consultant firm Combitech when integrating mobile platforms and handheld devices in industrial applications. This is accomplished through a comparison between the platforms and by considering the possible areas of use for the mobile platforms based on experiences from companies and research in the area.For a company with the intent to deliver services that use mobile platforms, it is important to be able to combine expertise and resources to effectively attract customers. The mobile platforms will, if applied right, give great possibilities in industrial applications as a cost-effective alternative for both hardware and software solutions for businesses, which provides an opportunity to sell services to both established and new clients.

The purpose of this essay is to test for significance between TED- spread and four different macrovariables, housing prices, Federal funds rate, Asset Backes Securities and mortgage volume. Multiple regression has been used to search for significance between the dependent and the four independent variables. Our data consist of quarterly reports from January 1998 to June 2008. Our conclusion is that all of the four variables show a significant relation with TED- spread. The model explains 76 percent of the variation in TED- spread..

The main purpose of a Flight Data Recorder (FDR) is to facilitate the investigation of incidents. In order to interpret the data that has been recorded in the FDR the data has to be visualized in some way. This can be done with software on a computer or with hardware that is specific for the model of aircraft that the data originates from.The aim of this project is to visualize data for six parameters from the FDR of Saab 2000 in an avionics rig. The avionics rig resembles the cockpit of Saab 2000 and the displays in it are identical to the ones found in the plane. All six parameters are shown on the same display.Due to safety regulation vital systems in aircraft are doubled, with one system on the left side and one on the right.

The report describes a measuring method for analysis of energy consumption measurement in microwave ovens. Concurrently that the awareness of the environment evolves the demands are growing for more power saving products. This is also counting within the Home Appliance business, which is Whirlpools business area. Whirlpool is therefore interested of launching microwave ovens with documented low power consumption. To be able to implement this, both asserted measuring equipment, that fulfils all demands, and a standard procedure is required.

The purpose of this thesis is to analyze the variation in the maximal discrimination of the interaction between cognate and a non-cognate codon and anti-codon (also called the d-value). The variation was analyzed with a multiple regression model with the d-value as the dependent variable and with the codon position and the different mRNA and tRNA bases as independent variables. The result of the analysis not only confirmed earlier studies that the maximal accuracy was highest in the second codon position and lowest in the third codon position but we also found significant relationships and interaction effects..