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2129 Uppsatser om Mechanical construction - Sida 48 av 142

Hörselnedsättning hos för tidigt födda barn ? En litteraturstudie

A stay in the neonatal intensive care unit of greater than 5 days is one of the identified risks ofa sensorineural hearing loss. Preterm infants usually have at least one risk factor for hearingimpairment. The period from 25 weeks' gestation to 5 to 6 months of age is most critical tothe development of the auditory system. We think it is important to investigate hearingimpariment among infants born preterm, degree and type of hearing loss, risk factorsassociated with hearing loss and how the auditory system may be affected by preterm birth.ObjectiveA critical review of the current literature including studies of preterm infants born betweengestonal age 25-37. Our aim is to identify the most common type and degree of hearing lossamong infants born preterm and if there is an association between hearing loss and pretermbirth.MethodA literature search of Scopus and Pubmed resulted in 16 articles from 2000-2015ResultsMost of the infants in this study had a severe to profound sensorineural hearing loss.

Elever med autism och asperger i en liten undervisningsklass : En alternativ skolform för elever med neurologiska funktionshinder

Background:Life-cycle costing (LCC) is an investment calculation that takes intoaccount operating costs throughout the investee lifecycle. LCC calculations are mainly usedto evaluate investments that have no revenue side. Attempts to apply the LCC calculations forbuilding-related investments have occurred since the 1980s. Despite the advantages ofusing LCC calculations, use has not passed through in full. The main obstacles have beenidentified as a lack of relevant input data, and insufficient experience of workingwith LCC calculations.

3D-modellering i AutoCAD -att skapa en digital huskonstruktion

3D-modelling in AutoCAD This thesis is done in cooperation with LB-Hus in Bromölla, and have aimed to establish a digital AutoCAD model of one of the company?s house types and to find out what opportunities there are to do visualisations in the form of images directly from the programme. Modeling has been carried out so that the very construction of the house is included. Interiors and installations, with the exception of the ventilation system, have been left out in the model. The model has been created with solid models after a comparative study made between solid models and surface models to find out which option in this case was the easiest to handle and took up the least space.

Varför svänger stenen? : En studie i curlingens komplexa tribosystem

The tribo system ice-curling stone was investigated in order to understand the mechanisms behind the stones' behavior on the ice sheet. The problem with non-identical stones should also be addressed.The stone curls, that is, its sliding path deviates from a straight line to the right for a clock-wise rotation and to the left for a anti-clock-wise rotation. Several mechanisms to explain this behavior have been proposed over the years but none has been successful.By carrying out experiments at the local curling rink and studying silicon castings of ice- and stone-surfaces with scanning electron microscopy and vertical scanning interferometry, it has been decided that the curl is not due to dry friction, ice-debris or the difference in friction on the left and right side of the stone. The side force comes from the fact that the friction is higher at the back of the stone than at the front.The contact between stone and ice is never completely dry, nor in the hydrodynamic lubrication regime. It is probably a combination of hydrodynamic lubrication and a contribution from mechanical scratching of the ice.

Gaffeltruckfri produktion : En studie genomförd vid Volvo Construction Equipment

Volvo Construction Equipment är en del i koncernen Volvo Group. Volvo Group som är en av de ledande aktörerna i världen på transportlösningar. Volvo Construction Equipment utvecklar och tillverkar anläggningsmaskiner i samtliga världsdelar utom Afrika och Oceanien och levererar produkter till kunder över hela världen. I Braås i Småland finns Volvo Construction Equipments huvudanläggning för utveckling och tillverkning av ramstyrda dumprar, inom vilket segment de är världsledande.Gaffeltrucken är den maskin som orsakar flest anmälda arbetsplatsolyckor i Sverige och i snitt anmäls cirka 750 olyckor per år. Företag har med anledning av denna säkerhetsrisk och produktivitetsbegränsningar i allt större utsträckning börjat studera alternativa lösningar för den interna materialhanteringen.

Optimering av Kettlebellstativ : Har ingen...

I got a request from Eleiko Sport AB regarding them needing help with trying to improve one of their products. The following examination project includes the principal- and primary construction reports within trying to make some improvements and optimizations on a stand for Kettle bells. I have in this project both made my own proposals to the stands legs, proposals on how to strengthen the shelf and also made an optimization of the original Kettle bell-stand. In this report, the project goes from idea to being built and analyzed in Catia, including the creation of drawings and material definition..

Form, funktion & frihet - utveckling av längdskidåkningsjackor med fokus på mönsterkonstruktion

Bakgrunden till denna rapport är att det sportvarumärke jag samarbetat med ville utveckla en modell av längdskidåkningsjacka som fanns i deras sortiment. Undersökningen gällde att identifiera förbättringspunkter på en dam- och herrvariant av denna jacka. Avsikten var att bevara plaggens design och genom förändringar i mönstrens konstruktion förbättra passform och rörelsefrihet, och därigenom plaggets funktion. Genom att konstruera, sy toiler och prova av dessa på provmodeller, har rörelsefrihet och passform kunnat utvärderas. Resultatet visade att viktiga punkter var raglanärmens konstruktion, böjningen av ärmen, kragens form, ärmhålsdjup och placering av skärlinjer.

Utvärdering av kalkstens egenskaper med laboratorie- och fältmetoder.

A pavement construction designed to cope with the different type of traffic loads; it is exposed to and at the same time it can resist the effect of the climate. A road structure consists of sub- and superstructure which is divided by a boundary known as terrace. During the construction of unbound layers (base course and sub-base course) in the superstructure, it is always ensured that the material meet the requirements for bearing capacity and the degree of compaction. These parameters are controlled by various laboratory tests and control methods. To obtain increased knowledge of the material and improve the quality of the compaction in the field, it is necessary to perform laboratory tests in order to determine material properties.A base course material 0/ 32 mm limestone from Gotland (Hejdeby) was investigated in this study.

Anonymous ansikten : En undersökningar av några svenska dagstidningars konstruktioner av hackernätverket Anonymous

This study examines how a couple of Swedish daily newspapers construct the hacker network Anonymous, with an aim to discuss its possible effects. The question was: In which ways is the network Anonymous constructed in a few Swedish newspapers?                      26 articles from four chosen newspaper were analysed, but because of many similarities in content, only 10 were chosen for deep analysis. With Fairclough's model of critical discourse analysis as chosen method, constructions varying from the images of heroes to villains were found as a result. The most common construction was that of Anonymous as a threat, which was most often exaggerated compared to what actions were actually described in the texts.

Dimensionering av grundläggning med hjälp av Eurokod

AbstractWork to develop the Eurocodes started in 1975 by the European Commission adopted a program to eliminate trade barriers within the construction area. The goal was to create common European design standards that would replace the member countries' own rules. Eurocodes will replace The National Board of Housing Building and Planning, National Rail, The National Road Administration and other agencies' calculation rules for the buildings structures. The transition to the use of Eurocodes looks like this:Eurocodes set to Swedish standards  between 2002 ? 2007They can be used parallel with national standards 2006 - 2009 The total transition is at the end of 2010/2011.Right now is going on a lot of work for replacement of the existing standards to Eurocodes.  The transition to the new calculations` standards, many construction companies and consulting firms facing a big changes and competitions.

Utvecklingsprojekt av förpackning inom livsmedelsindustrin

This report covers the thesis done by mechanical engineering at the engineering program at the University of Halmstad. Student Work Development of packaging in the food industry includes 15 credits and has performed over 20 weeks in spring 2009. The thesis work is a compulsory part of education and aimed at the student must apply the knowledge it has given during training in a project related to reality. Student work has been carried out in cooperation with Hanson & Möhringen AB and the project's main objective was to develop an environmentally friendly packaging to their brand Falk Salt. When salt is one of the world's cheapest commodity was packing all the costs have to be as low as possible.

En bostadsmarknad på svaj med lyxboenden på kaj : En studie av fenomenet bostadsbrist på hyresmarknaden och dess problem ur aktörernas perspektiv

70 percent of Sweden´s municipalities say they do not have vacant rental flats and a shortage is emerging, during the same time are 1.1 million young people ready to enter the housing market. In order to curb the housing shortage, have the Swedish politicians since the postwar period chosen to stimulate the market with subsidies to increase new production and to control that what is built is in the right direction. The construction industry is perceived as conservative, and many argue that the state keeps it under their wings, which has led to that the development not has progressed in the same way as other, non-subsidy regulated industries.The purpose of ours bachelor thesis is to provide an overall picture and describe the underlying problems of the housing shortage at the rental market. In addition, we want to present theories about where possible actions could take place in the market, by illuminate the problem from the differente actors perspective.To fulfill our purpose and provide a deeper understanding of the problem we have chosen a qualitative approach. We interviewed nine different actors on the Swedish housing market, two managers, two to representatives of Halmstad Municipality, a representative for the construction operators and four different interest groups.

Mjölkkyl till espressomaskin : Impressive cooler

The project was made in cooperation with Coffee Queen AB, Arvika. The task was to develop and design a new cooler for the milk to Jura Impressa X9, an espresso machine. The good assistance with staff at Coffee Queen and engineers in China and at KPA in Karlstad led to a solution to the problem. It was a long road to get there, many different concepts was developed. When the day came to decide which concept to work with, the choice stood between two different technical solutions.

Translokation av större vattensalamander : -bevarandestrategi eller riskåtgärd?

This study evaluates the retention of nitrogen and phosphorus in four newly constructed wetlands in the municipality of Falkenberg, Sweden. The four wetlands have been selected because they have been specifically constructed with the aim to reduce nitrogen and phosphorus in farming areas. The process of selecting the specific wetlands has been done in collaboration with the county administration in Halland. Through field studies in collaboration with the landowners where the wetlands are sited, the areas that provide the wetlands with water were determined. The size of these drainage areas were determined in a GIS computer program. The type of land use within the drainage areas was also determined.

MPD-vågformer för helikopterradar

A helicopter based system equipped with a millimetre-wave fire control radar is studied for improvement of the detection probability for moving ground targets. The system is a pulse doppler radar that sends out the electromagnetic wave in repetitive pulses. The frequency in which radar sends this pulse is called Pulse Repetition Frequency (PRF). The velocity of the moving targets is measured by spectral analysis of the pulses received. With this sort of system some targets will not be possible to detect.

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