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399 Uppsatser om Mathematical optimization - Sida 20 av 27

Matematikverkstad : -ett förhållningssätt

SammanfattningDenna uppsats har sin bakgrund i fem ord som kan ses som en kort sammanfattning kring vad matematikundervisningen bör innehålla enligt Lpo94 och kursplanen för matematik. Där står att matematik bör pratas, undersökas, upplevas, skapas och utforskas. Om dessa ord får finnas med i undervisningen så bör man kunna göra matematiken roligare och mer intressant. Att finna glädje och lust till matematiken är väldigt viktigt för att fånga barnens uppmärksamhet och rapporten Lusten att lära?med fokus på matematik diskuterar just vikten av lusten till matematik.  Baserat på vad som står skrivet kring matematikverkstäder så borde pedagoger kunna jobba i enlighet med vad Lpo94 och kursplanen i matematik förespråkar.

Utveckling av en ytmonterad fördelningsmätare som underlag för individuell debitering av vattenförbrukning i fastigheter

The master thesis, conducted at Metrima AB, concerns the development of a non-intrusivedistribution meter as a basis for individual tap water billing in apartments.The project is conducted in response to the market interest in individual tap water billing inapartments as an answer to environmental concerns regarding water consumption. Due to thehigh installation cost of traditional water meters, a new method of determining waterconsumption, without having to cut water pipes, is proposed.The proposed method distributes the total water consumption for an apartment complex toindividual apartments according to distribution meters, measuring water run-time, in eachapartment. The water run-time is estimated by measuring the water pipe?s outward vibrationsand temperature changes.A test environment was established and a prototype built, using a tilt- and vibration sensor forvibration sensing and a precision temperature sensor to measure temperature changes. As bothsensors work well in the test environment, further testing was done in 3 apartments for aduration of 5 days.

Reglering av matarsystem vid höghastighetskapning

Today small metal parts are mass-produced as for example rollers in cylinder bearings. At high velocity cutting the metal is cut with a great force in a scissor-like device. Both precision and repeatability is important to be able to guarantee good quality, but from an economical point of view it is also important to keep a great manufacturing capacity. The part of the process that is most time consuming is when the metal bar, that is about to be cut, is fed to the right position. Therefore it is interesting to examine if the time used for positioning can be reduced.

Projektrisk : en studie av svenska bygg- och anläggningsföretag

Background: Today businesses are largely structured in projects and temporary organizations. In many companies, the ability to pursue projects is decisive for the business efficiency and competitiveness. The risk literature do not discuss identification and handling ofproject risk in building- and construction companies to a large extent, which has led us to investigate how project risk can be treated and handled in Swedish building- and construction companies. Purpose: The purpose of this thesis is to cover and describe business risk in Swedish building- and construction projects with focus on different risks and risk tools, and also to modify a model for evaluating the business risk maturity. Realization: This thesis has both traces of a case study and a cross-section study and examines eight different companies that are active in the building- and construction business.

Optimering av smidesgeometri för P-fläns på bakre turbinstativ (TEC)

This thesis work has been performed at Volvo Aero Corporation in Trollhättan, at the department of ?hot structures? involving aircraft engine GP7000. The purpose with the study was to investigate the possibility to reduce size of the forging of flanges on the rear turbine frame when purchasing. Thereto examine the parameters that affect the flanges motion during the manufacturing process. The goal was to provide Volvo Aero with foundation to later bring in slimmed forgings.

Modellering och simulering av det evaporativa bränslesystemet i en personbil

This thesis work has been performed at the department of diagnosis and dependability at Volvo Car Company, Torslanda. The background of this project is based on interest in ascertaining how different factors possibly can affect a diagnosis method, which has been developed to find leaks in the fuel tank and evaporation system. According to the OBD II requirements leaks with an orifice diameter larger or equal to 0,5 mm, must be detected. The idea of the diagnosis method is to create an over pressure in the system with an air-pump. The current through the pump is measured and correlates to the power consumed by the pump.

Hur uppnår vi god inomhusmiljö i förskolan idag?

Abstract:This thesis work has been conducted at the Real Estate Department in Halmstad.The department consists of a construction/project management-unit and an operation/management-unit.Like many other towns in Sweden, Halmstad has had a long lasting problem with indoor environment. Not at least at their preschools.Today they are constructing from current building regulations. They have learned from negative experiences which have occurred in the indoor environment in older buildings.Focus is now on healthy materials, like low emission value, energy efficiency and optimization of the building, but still with soft parameters such as cleaning, interior and choice of materials.The fixtures is provides by the real estate department and the furnishings are provides by the children and youth administration. Together they are trying to provide a great indoor environment.I have, together with the real estate department and the children and youth administration of Halmstad, investigated how to provide a good indoor environment in the preschools with small funds.In my thesis there is one theoretical part with a questionnaire survey of how the preschool staff is experiencing their indoor environment to determine where the problems often start. And a practical part with measurements to try and come down to a result that analysis the cause of the problems and also to make sure that the ventilation systems are fulfilling projected values.The measurements and the questionnaire surveys was made at Lokes preschool in Frösakull, Askens preschool in Oskarström and Gullbrandstorps preschool.There were some differences between the staff-responses at the three different preschools.At Askens preschool they feel that the premises are cleaned poorly.At Gullbrandstorps preschool they feel that the indoor-air is bad because they can´t open the windows.

Matematik 1 ur ett kompetensperspektiv : Hur innehållet i kursplanerna och ämnesplanen för matematik 1 går att tolka ur ett kompetensperspektiv

Syftet med denna studie var att undersöka i vilken utsträckning de tre kursplanerna för matematik 1 (1a, 1b och 1c) samt den tillhörande ämnesplanen gick att tolka i form av kompetenser. Vidare jämfördes även kompetensfördelningen mellan matematik 1 och matematik A. Studien grundade sig främst i ramverket MCRF (Mathematical Competency Research Framework) som presenterar sex matematiska kompetenser, men vi tog även hänsyn till ytterligare sex kompetenser som återfinns i NCTM (The National Council of Teachers of Mathematics), KOM-projektet (Competencies and the Learning of Mathematics project) samt Adding It Up. Kursplanerna och ämnesplanen har granskats med hjälp av en kvantitativ textanalys där innehållet delats upp och kategoriserats till de olika kompetenserna enligt kompetensernas definitioner. Utifrån resultaten kan man säga att förekomsten av de totalt tolv kompetenserna är relativt jämnt fördelade inom matematik 1a, 1b och 1c.

PARAMETRISERAD DESIGN APPLICERAD PÅ EN MOTORSÅGSKEDJA

The main objective of this thesis was to develop appropriate strategies and find factors that affect the usability of parameterized designs. This was accomplished by investigate the user-interface and how it is designed to meet the user's information needs. The thesis also embraces the basic theories in terms of investigation, cognitive design principles and human behavior patterns in the interaction with the machine. The approach has led to an explorative investigation in this subject area.The thesis also had the purpose to achieve more efficient ways for development of motor chainsaws at Husqvarna AB's department Global Cutting Equipment. That can be achieved through reduce costs of development per sold unit.

Att arbeta med elever i matematiksvårigheter : Fyra speciallärares berättelser

Syftet med denna studie är att få ta del av speciallärares erfarenheter kring sitt arbete med elever i matematiksvårigheter. Jag valt att göra en livsberättelsestudie, där fyra speciallärares berättelser kring sitt arbete med elever i matematiksvårigheter är i fokus. Genom deras egna berättelser om sitt liv som speciallärare vill jag komma åt hur de jobbar med sina elever och varför de väljer att jobba på just de sätten de gör. Jag vill få fram speciallärarens tankar kring varför dessa elever hamnar i matematiksvårigheter och vad det kan bero på.Resultatet visar att de speciallärare som deltagit i studien är ganska samstämmiga i hur de idag jobbar med sina elever och varför de gör som de gör. Resultatet visar att det är en komplex fråga hur man får dessa elever inkluderade i den ordinarie undervisningen.

Det ligger i människans natur att berätta historier : Hur corporate storytelling på intranätet kan öka personalens tillfredsställelse

Titel:                                   Det ligger i människans natur att berätta historier - Hur corporate storytelling på intranätet kan öka personalens tillfredsställelseFörfattare:                         Maria Karlsson & Cecilia LindbergHandledare:                      Kent SahlgrenNivå:                                  Kandidat i marknadsföring, (15 högskolepoäng), Våren 2010 Nyckelord:                         Corporate Storytelling, Intern marknadsföring, Kommunikationsföringsverktyg, Shannon & Weaver modell, Intranätet, tillfredsställelseFråga:                                Hur kan stora svenska banker använda intern Corporate Storytelling på sitt intranät för att öka personalens tillfredsställelse på arbetsplatsen?Purpose:                            Denna uppsats avser beskriva och förklara hur stora svenska banker i praktiken kan använda intern storytelling som ett verktyg på företagets intranät för att öka personalens tillfredställelse på arbetsplatsen.Method:                            En kvalitativ forskningssats har används på ett fallföretag, Swedbank. Teoretiskt perspektiv:     Vi börjar det teoretiska avsnittet med att implementera corporate storytelling till kommunikationsprocessen mellan ett företag och dess personal, för att sedan presentera våran omarbetade version av Shannon och Weavers modell ?the mathematical theory of communication? model.  Det teoretiska avsnittet analyserar hur corporate storytelling kan användas för att öka personalens tillfredsställelse på arbetsplatsen.Empiriskt perspektiv:      Det empiriska avsnittet presenterar resultatet av intervjuerna med de tre respondenterna på vårt fallföretag, Swedbank. Slutsats:                            Studien visar att corporate storytelling kan användas för att öka personalen tillfredsställelse på arbetsplatsen. Denna tillfredsställelse är dock beroende av att företaget anpassar storytellingen efter personalens vardag på arbetsplatsen. ?.

Att tala är silver, att tiga är guld? : - En kvalitativ studie om interaktion i samband med talad engelska under engelsklektionerna

Since the 1990?s the Swedish school system has undergone major and recurring structural reforms. Two of the most comprehensive changes has been the shift of primary schools as an integral part of the welfare state to the responsibility of the municipalities as well as the introduction of free school choice for the students. Through two months of participant observations and semi-structured interviews this thesis seeks to answer the question of how these reforms has come to effect the work of teachers in a medium sized public school in a small municipality in the outskirts of Stockholm. Earlier research has shown that public schools in socio-economically vulnerable areas are disadvantaged due to the reformation of the school system (Beach & Sernhede, 2011; Östh, Andersson, & Malmberg, 2013).

?Leka matematik och få roliga läxor!? : En undersökning av några pedagogers ambitioner för matematiklärande i förskoleklassen

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.

Kommunfullmäktigeledamöters sociala representation -en fallstudie i tre svenska kommuner av kön, ålder och etnicitet

The purpose of the thesis has been to explore the use of hedge fund styles when constructing portfolios of hedge funds (i.e. funds of hedge funds). The central question is if the use of hedge fund styles can significantly explain and improve risk adjusted returns (characterized by Sharpe ratios). The study has been done in collaboration with Optimized Portfolio Management AB who desire further knowledge and evaluation of hedge fund styles for their fund of hedge funds.To be able to create successful ex ante portfolios we have explored various prediction models for both risk and return. Our findings indicate that return prediction is problematic using simple models such as regression since the risk exposure of the indices appear to change significantly over time.

Vad påverkar en aktieanalystillförlitlighet? : En kvantitativ studie om relationen mellan tillförlitligheteni en aktieanalys och dess innehåll.

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.

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