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572 Uppsatser om Mathematical contents - Sida 35 av 39

Beräkningsmodul för ett förbättrat offertförfarande och minskad icke-värdeskapande tid

In early January 2010 the authors participated in a meeting with the chief engineer for a company in which a central part is manufacturing of printed circuit boards (PCB). At this meeting it emerged that the machinery and production methods have changed substantially since the early 1990's. The spreadsheet for preliminary production time calculations by the company is today based on conditions from almost 20 years ago. The company has over the years been trying to adjust the spreadsheet template. The result of these adjustments has filled it with historical residue, something which makes the template difficult and time consuming when the primary user tries to handle it.The purpose of this study was to help the company increase its accuracy in the representation of the production times for the different PCB-based products by developing a new costing model based on an already existing but inadequate spreadsheet template. The company also expressed the wish that the new costing model would be less time consuming to work with.The methods used to achieve the goal are interviewing, participatory observations and meetings with relevant persons. The data obtained were analyzed using the theory on PCB production and visualization of data.

Påsköns stenstatyer, moai : Vilket genus representerar de?

Abstract.The question in this analysis is which gender moai, the big statues on Rapa Nui, represent. My hypothesis is that they have developed from visual symbols to metaphores in mythologies from an polynesian context. That these statues were symbols for human origin and creation of ancestors ideological power, and gods in consideration male gender. In the long isolation, in both time and space, the mytologies in Rapa Nui was changed, and the pictures got a new meaning. These changes depended on clearing of wood and big trees and the following difficult situation in farming.

Svinnoptimering VTIS1

The goals of this Bachelors? Thesis were to establish the production loss through the VTIS1 Pasteur at Arla Foods Linköping dairy and then suggest simple but effective solutions to minimize the losses for each production run. If the timeframe allowed it, some of the solutions would be implemented and tested in full production to determine their impact on economic and environmental savings.The very first step of this project was to establish the statistics over what losses there is in the production pipeline through VTIS1, from milk and powders in mixer tanks to finished and packed products in cold storage. Then, when knowing how much product was actually lost and where, those bottlenecks could be pinpointed and examined more closely. At this stage the focus was switched, from the otherwise complicated and broad manufacturing process, to the VTIS1-aggregate, since early data indicated there were quite substantial losses there.In conjunction with this project Arla Foods purchased an absorption photometer-measuring device (OPTEK AS16) that could be inserted straight into the product stream out of VTIS1, allowing real time measurements of its optical density.

Hållfasthetsegenskaper i gjutjärn : tensile properties of cast iron

In the last few years people have become more and more aware of how humanity is affecting the climate. In the direction of reducing the greenhouse gases is to design engines with higher tensile properties and reduced weight, in order to achieve lower fuel consumption and cleaner fuel incineration in today's truck engines.In order to achieve these requirements it?s necessary to increase the combustion pressure in the engine. This requires higher tensile properties and high thermal conductivity of the engine material. The department of Component Technology at the University of Jönköping in collaboration with Volvo Powertrain AB, Scania CV AB and DAROS Piston Rings AB has been commissioned to develop this material and to find knowledge of material properties used in truck engines and piston rings used for marine applications.The purpose with this work is to analyze the tensile properties of a series of cast iron, cast under different metallurgical conditions.Four different series of cast irons have been analyzed from four points of view, carbon concentration, nodularity, amount inoculation and cooling rate.After the tensile test all specimen data was analyzed in a mathematic calculation program called Matlab 2006a.

Latent värmelagring i vattenburet uppvärmningssystem med elpanna för byggnadsapplikationer

Latent heat storage is a way to store thermal energy when a phase change material undergoes a phase change. The advantage of latent heat storage is the capability to store more energy per mass unit than other heat storage methods. The most commonly used phase change in latent heat storage is the transition between solid and liquid. Phase change materials can be divided into organics, inorganics and eutectics.In the Nordic electricity market the price of electricity is set every hour by Nordpool spot, which leads to price fluctuations because of changes in demand. The main goal of this report is to create a latent heat storage system in a single-family home and investigate the possibility to save money by charging the latent heat storage system when the price of electricity is low, and discharge when the price is high.The thermodynamic model consisted of a ?tube-in-tube? heat exchanger with phase change material in the outer tube and water as the heat transfer fluid in the inner tube.

Användandet av revisionsberättelsen utifrån revisorernas perspektiv

Revisionsberättelsen är ett viktigt verktygför kommunikationen mellan revisorerna och in­tressenterna. Dagensrevisionsberättelse är väldigt standardiserad och i samtliga delar finns detförslag till exakta formuleringar. Enligt tidigare forskning finns det enintressekonflikt mellan intressenterna och revisorerna. Denna konflikt handlarom att intressenterna vill ut­vidga informationsinnehållet irevisionsberättelsen vilket revisorerna är kritiska till eftersom detta skulleinnebära mer ansvar och mer att stå till svars för. För att lösa denna konflikthar revisionsberättelsen debatterats flitigt och i en debatt diskuteras om mankan göra revisions­berättelsen intressantare genom att betygsätta företag iexempelvis intern kontroll och bolagsstyrning.

Skräckens politik : Hedersrelaterat våld i den svenska demokratin

The purpose of this paper was to carry out and evaluate a pedagogic ICT-project, where the computer was implemented in art class. Focus was on the consequences of collaboration and also on the students? understanding of their own performance, compared to techniques in traditional art class.The study was qualitative and began with studies in literature. The contents of the literature are the foundation of the discussion, especially theories concerning the learning process, IT and computer-based learning. In the project, three different groups of students from upper secondary school attended and they where given tasks to solve in the image editing program Paint Shop Pro.

Vitamin A och E i relation till hästutfodring :

The purpose of this study was to examine vitamin A and E in equine nutrition and especially in relation to forages. A literature review was conducted to examine factors that influence the level of vitamins present in forage, the vitamin A and E requirement of horses, and the absorption of vitamin A and E in horses. The influence of DM level on alpha-tocopherol and beta-carotene content in ensiled forage was investigated in a controlled ensiling study using baled silage and haylage. The results from the ensiling study were combined with data of vitamin A and E concentrations collected from literature. Calculations were done to theoretically establish how well the vitamin content in ensiled forage can cover the maintenance requirements of vitamin A and E in horses.

Samspel mellan amerikansk blomtrips, Frankliniella occidentalis,och kruk-gerbera, Gerbera jamesonii :

Gerbera jamesonii is a plant with a large amount of pollen and various flower colours and a favourite host plant for Frankliniella occidentalis. The best growing temperature for gerbera is approximately 20°C. Frankliniella occidentalis or the Western Flower Thrips is a small insect that has become an important pest in greenhouse cultivation all over the world. The high temperatures in the greenhouse are favourable for F. occidentalis.

Datorn i bildundervisning : En studie på tre elevgrupper med fokus på samarbetet

The purpose of this paper was to carry out and evaluate a pedagogic ICT-project, where the computer was implemented in art class. Focus was on the consequences of collaboration and also on the students? understanding of their own performance, compared to techniques in traditional art class.The study was qualitative and began with studies in literature. The contents of the literature are the foundation of the discussion, especially theories concerning the learning process, IT and computer-based learning. In the project, three different groups of students from upper secondary school attended and they where given tasks to solve in the image editing program Paint Shop Pro.

Uppstart av Totalt Produktivt Underhåll på Tour & Andersson AB

In order to continue to be competitive in the current industrial climate, producers must increase efficiency at their plants. Several Swedish companies choose to utilise the principles of Lean production. Tour & Andersson AB (TA) has elected to create their own model using Toyota?s productions system which has been named TAPS (Tour & Andersson Production System). Following two years of working with TAPS the company has decided to introduce Total Productive Maintenance (TPM). Most of the work carried out in the maintenance department today is in form of repairs to already faulty equipment.

Barriers to convert to organic farming and the role of risk : an empirical application on Swedish data

To understand the motives, and perhaps more importantly the barriers, for farmers to convert from conventional to organic farming is of great interest for policy makers as well as for academics. In Sweden and in other EU countries, proposed targets of the area in organic farmland have failed to be reached in spite of different kinds of policy measures. Most studies agree that the average profitability seems to be comparable to or better in organic than in conventional farming. This would indicate that there must be other factors of importance which can explain the low particiapation rate. A higher perceived risk in organic farming with respect to yield and price is frequently brought up as a potential explanation within a qualitative framework.

Utrikesbevakning : ? påverkar media agerandet i internationella kriser?

AbstractTitle: Foreign news coverage. Does the media influence the action in international crises? (Utrikesbevakning. Påverkar media agerandet i internationella kriser?)Number of pages: 39Author: Charlotta AndréssonTutor: Professor Lowe HedmanCourse: Media and Communication Studies CUniversity: Division of Media and Communication, Department of Information Science, Uppsala University.Date of submission: 2007-01-03, autumn term of 2006Purpose/AimThe purpose of the essay is partly to examine if foreign news coverage influence the political agenda setting and the incentives of the public?s willingness to give charity for humanitarian crises.

Majsensilage - partikelstorleksfördelning och hygienisk kvalité :

Fieldstudys on 22 farms (23 silos) to study relationships between the actual particle size of the maize silage and the theoretical length of cut. The measure of theoretical length of cut were stated by the farmers and not measured by us. Particle size of maize silage was determined using the New Penn State Forage Particle Separator. SLU Skara made a special sieve for us, that had larger holes than de original sieves. The samples were shaken after instructions and then the material was weighted. We have also been taking out samples for microbiological analyses from the silos on 13 of the farms.

Miljöbedömning av mark- och vattenresurser i kommunal översiktsplanering : en fallstudie av en del av planprocessen i Tierps kommun

This paper describes the integration of environmental assessment in Swedish municipality comprehensive planning through a chosen case study. The implementation of a new EGdirective in Swedish law, concerning Assessment of the effects of certain plans and programmes on the environment, should lead to some changes in the way Swedish municipalities' deals with environmental issues in their comprehensive plans. This could later on lead to new preconditions for municipality comprehensive planning. The purpose of this study was to investigate how the planning organisation in the municipality adapts to new regulations for impact assessment of comprehensive plans required by the Planning and Building act. Secondly the purpose was to partly participate in the early stages of the planning process and thereby indicate and identify possible environmental impacts regarding the aspects of land and water. This was done as a case study in a well defined part of the process.

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