The concept of function represents a major part of mathematics and becomes more significant in school during high school. Throughout history, it has been a difficult concept to define and may create challenges for contemporary students. This literature study aims to identify students' difficulties with the concept of function, as well as to account for how the definition of a function has evolved historically. The literature study has been conducted through database searches in ERIC, Education Research Complete and MathSciNet via EBSCOhost, as well as through chain searching. The study results in identifying that students' difficulties with the concept of function primarily include the graphical and algebraic forms of representation.

The thesis examines the view of reality as expressed in the subject structure of the web directory Open Directory Project. This is analyzed in comparison with library classification systems, regarded as products of the modern library movement. The question is raised whether the world view of the directory, in contrast to the modern classification systems, can be seen as an expression of postmodernity. Postmodernity is then understood as a radical critique of the modern belief in neutral science and technology as ways of objectively describing the universe of knowledge. The theoretical and methodological approach adopted is borrowed from a poststructuralist reading of Michel Foucault's archaeology and sociologically coloured classification research.

Immersion is a construct that measures how deeply engrossed a user is with any mediated situation. In the field of game design, immersion is a significant aspect of what makes a game enticing, and as such it is of pivotal importance to create and maintain it to keep the player's mind off the real world while inside the confines of a game framework. According to the GameFlow theory, it is one of seven key tenets of evaluating and implementing a successful game design. Yet, certain multiplayer online games are designed in a fashion that in some cases seem to break immersion, where the player is frequently put out of action, sometimes for minutes on end. In this study, using online questionnaires, we discover that players, despite claims otherwise, seem to be in several ways affected negatively by this breaking of immersion.

Energy issues are constantly increasing attention in today's society. People's impact on Earth isentered in more contexts. Many discussions are about how the entire social structure needs to bestreamlined in order to achieve sustainability. The residential and service sector accounts for 39 % oftoday's total energy consumption in Sweden and the increasing electricity prices have made buyersmore interested in energy issues.There are many buildings in need of refurbishment today, including all the apartments that werebuilt in the 1970s to reduce the housing shortage at the time. 650 000 apartments of one millionapartments were built during the so-called the one million program and is currently in need ofrefurbishment.

This project is about investigation and improvement of a V-plow for the company Swekip. A V- plow is used for snow removal but this product has been found to have deficiencies in its construction, breaking down and not living up to the desired objectives. This is because the product is ordered from a company in China where they have some problems with understanding the purpose of the plow.Initially the existing plow is investigated, all the shortcomings set out and examined, what is wrong and what needs improvement?When the solutions were done they were evaluated and examined that they actually live up to the desired requirements.This assignment is a pure construction project where the majority is implemented in CAD, where models are developed and FE analyses are carried out. But the project also includes a feasibility study, idea study and hydraulic design.The results are presented in the form of a CAD model and associated drawings that will serve as the manufacturing basis for the new V-plow.

The subject of this thesis is the history of the library at The Göteborg Museum of Art. The aim of the thesis is to depict and analyze the emergence and the expansion of the library?s holdings until 1939. To fulfill the aim, two questions are asked. The first question is: Is it possible to argue that the library?s holdings were collected to document the entire world of art? The question is formulated in relation to a comment by Susan Wyngaard.

This Degree Project is carried through in association with Fototext in Guthenburg. The firmsees benefits using?Soft Proof? technology for both economic and time-saving. The reasonfor ?Soft Proofing? for internal/ external production is to estimate and controll documentswithout using digital or chemical printing output.The different technical solutions to ?Soft Proof?, knowledges and facts aboutColorManagement together with PDF-workflow is going to pattern for a correct succesfull?Soft Proofing? on the monitor.Acrobat 5 in association with Photoshop 6 are effectively used in ?Soft Proofing? technic.The advance and capacity of the graphical softwares which are explained in this reporthelps the users to begin to experiment with ?Soft Proof?.

This essay is a product of the author?s interest in silent films from Soviet, especially, documentary films. Before the 1920?s documentary filmmaking had mostly been limited to newsreels and short scenes. Only occasional feature-length documentaries had been made.

This thesis has been carried out in collaboration with LEDtec International AB. LEDtec focuses on innovative solutions in LED screens. Everything from large advertising signs to welcome signs in cities, to screens indicating speeds or warning of heavy traffic. The task was to was to help them develop a new version of the control board that is used in some of their products. The reason for this is that their old control board is obsolete and the components that are on it, is no longer manufactured or in need to be renewed.

Background: Goodwill has been a hot and debated topic for a longer period of time. Researchers have debated how goodwill should be accounted for and have not come to a solution. In 2005 IFRS standards came which meant that goodwill no longer will be amortized according to plan, but to be put through a yearly impairment test.Problem: A number of disclosure requirements in the financial reports have been made in an effort to avoid companies to account for goodwill differently. Apparently there still is a problem of how companies account for goodwill and there are several studies in the subject. But no one has studied how it is between two different industries, which make this study interesting to execute.Purpose/questions: This study have the purpose to investigate how the industries day to day wares and health care regards the disclosure requirements for goodwill by the impairment tests.

How can a vacuum cleaner motivate you to use it? From a sustainability perspective,the author asked the question of how such a solution would looklike? These where issues that the project tackled and devised solutions for. Theproject wanted to explore the physical modeling and a large part of the finalresult consisted of a full scale model. The project found that the problem ofvacuuming largely consisted of the problem of storage the product. The projectfound that the motivation for the job, therefore, could be resolved by a betterdesigned vacuum cleaner with a built-in hose, folding handles, which couldbe stored integrated within the vacuum cleaner.

A favourable economic situation in Sweden has lead to a very good market for agricultural real estates. The estate agents? ads in the daily newspapers, where they actively are seeking assignments, give a hint that the supply is smaller than the demand for agricultural real estates. This situation ends up in a competition between real estate agents to get as many assignments as possible to meet the demand from the market. Describing and explaining the sellers? decision process may give a specific agent an advantage towards other agents.

Problem: How does project managing appear in small IT-consulting companies and how does the project manager carry out their projects to create successful solutions for their customers?Purpose: The research has the purpose to analyze and review how IT-consults in small companies work and lead their projects to create profitability for the company, which leads to a good development for the company.  Methodology: The research is made on eight research objects in IT-consulting business and the sizes of them are between 1-49 employees. The research is made with a qualitative method to get closer to the research objects. Therefore the research is made in forms of interviews. The analysis is grounded on a comparison between the research data and the theories that are used in the research.Theoretical perspectives: The theories which have been used in the research are Involvement theory (Fill, 1999), PAFF-metoden (Marcusson & Ahlin, 2002), Projektledning (Tonnquist, 2006), Jakten på det effektiva projektet (Engwall, 1999) och Mervärde (Grönroos, 2002)Empirical foundation: The research data are founded from the interviews of the eight research objects, they have the fictive names: Gondor, Minas Morgul, Minas Tirith, Mordor, Osgiliath, Rivendell, Rohan and The Shire. Analysis/Result: Each study object starts their projects with a pre-study phase, as the PAFF-method describes it.

Denna rapport utgör det avslutande momentet på programmet Produktutveckling 180hp vid Blekinge Tekniska Höskola. Rapporten kommer behandla framtagning av en nykonstruktion för fixturering av propellerblad i en bearbetningsmaskin. Arbetet hart gjorts i samarbete med företaget Xylem Water Solutions Manufacturing AB i Lindås. Arbetet har mynnat ut i ett konceptförslag och en rapport som projektgruppen för inköp och uppstart av den nya maskinen kommer kunna ta del av och använda som underlag vid detaljkonstruktionen av den faktiska fixturen som kommer tillverkas. Den största delen i detta arbetet har lagts på alla de steg som har varit nödvändiga att göra för att kunna komma fram till slutresultatet.

Making the work in the public sector more efficient is something that has been seen as necessary during the later years. One way to do this on municipal level has been to apply solutions former used mostly by private companies. The organisational parts have also been adjusted to existing conditions in this work of change. For example more and more municipalities have come to use the purchaser-supplier model since the beginning of the 1990's. Norrköping, Linköping and Motala have been chosen in this essay for a closer study of the effects of the changes of the 90's, from an efficiency point of view.