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1694 Uppsatser om Natural frequency - Sida 18 av 113

Wobblerpump

The task was to design and manufacture a submersible displacement pump working with the wobble plate principle. The main task for the Wobble plate pump is to be used as a sewage pump for smaller households or dewatering pump in environments where small flows and high pressures are acquired. For these purposes ITT Flygt sell a screw pump, PC-Grinder 3068. The hydraulic part of the PC-Grinder is manufactured by a subcontractor. Therefore ITT Flygt wants to evaluate an alternative to their screwpump PC-Grinder, which can be entirely manufactured by them self.

Upplevda oönskade beteenden hos katt : förekomst och orsaker till dessa

The objective was to examine the frequency of unwanted behaviors in the Swedish feline population and what factors in the environment, inheritance and past life that have an influence on the frequency. SLU?s web poll generator was used to create a web poll which insinuated that it was a poll with objective to make an inventory of the Swedish feline population. I wanted to avoid that only owners to cats with unwanted behaviors answered the poll. The web link to the poll was sent to SLUs students and posted on Internet forums for people interested in cats.

Paul Tillich och Verkligheten : Är Bibelberättelserna "bara" symboler

In this essay I have aimed to examine how the theology of Paul Tillich relate to modern views of reality, both the way it was expressed in his contemporary time and the way I see it today. Reality I have defined as an entirety of the physic- and metaphysic reality. A so called panentism where God is reality and the world is a part of this reality.With Tillichs Systematic Theology as my principal material, I have first made a brief presentation of his theology, of its construction and main concepts. Then I have chosen to further examine the way he describes being, reason and revelation to see how this particular concepts of Tillich agree with my definition of reality. In this I have consulted the books Tillich in Dialogue by Mackenzie-Brown and Natural Theology Versus Theology of Nature, a book edited after the forth international Tillich symposium 1992, which had "Tillichs thinking as impetus for a discourse among theology, philosophy and natural sciences" as a theme.I have tried to point out the possibilities opened up by the ontology and epistemology of Tillich for the dialogue between theology and natural sciences.

Mätning av partikelmassa i avgaser från en dieselmotor

This master thesis was a continuation of a previous study in the diesel exhaust characterization, which is part of the academical work embedded in the EMIR-1 project. The main objective of this thesis work was to finish the installation and make the proper modifications of the particulate mass measuring system located in one of the engine test cells at KTH, in order to be able to measure the mass of the particles from the exhaust of diesel engines.This experiment requires a diluted flow sample from the exhaust that should be sent to the device that makes possible the measurement of particle mass, called TEOM. In the first stage of this project, the objective was to study and make the proper modifications in the existing KTH diluter because there were several problems to obtain a constant dilution ratio from it during tests.This modifications were made and it resulted in a great improvement in the maximum inlet and outlet flow that this diluter can handle. Therefore another modification is proposed for controlling the inlet exhaust flow so it will be possible to regulate the dilution ratio and make it constant along a wide range of engine loads and speeds.The second and most important stage was to make particulate mass measurements possible by analyzing the frequency signal from the TEOM device. The idea was to obtain the frequency of oscillation from the tapered element in the TEOM, and therefore with the proper correlations, be able to predict the particulate mass concentration in the exhaust flow from the engine.An electrical problem in the TEOM circuit was detected and corrected, so the signal that carries the frequency from the TEOM can be analyzed properly.

En kartläggning av den globala handeln med Liquefied Natural Gas, LNG

Det här arbetet handlar om den globala handeln med Liquefied Natural Gas, LNG.LNG är naturgas som har gjorts flytande och består till mer än 90 % av metan. Sedanden första kommersiella transporten ägde rum år 1959 har den globala handeln avLNG ökat. Mellan 1980-2011 ökade den globala handeln av LNG med nära 1000 %.Under samma tidsperiod har den globala kända naturgasreserven ökat med mer än150 %. Antalet exportörer och importörer av LNG förutspås att öka i framtiden ochunder 2010 kondenserades ca 10 % av världens totala utvinning av naturgas för attexporteras i form av LNG. Focus i det här arbetet har lagts på att kartläggaimporterande och exporterande länder samt rederier som sköter själva sjötransportenav LNG.En kartläggning har gjorts med syfte att beskriva samt förklara den globala handelnmed LNG.

?Thy sanningen bliwfer ändånäst Gudz hielp alltid ochallena bestående.? : Naturrättsliga influenser i några karolinskakrigares källor kring 1700.

This study aims to describe the influence of natural law on the common concept of justiceamongst Swedish officers around 1700. Through this study I intend to establish that therewere discrepancies and expressions of other norms in 17th and 18th century military culture.Both from natural law but also from Christian belief. A secondary aim is to establish howsuch variances were manifested and how they can be explained.A few theoretical starting-points have been used as a guide in developing the purpose andrelevant questions for this study. I intend to describe the key features of the concept of naturallaw as thoroughly as needed, through relevant legal literature. The next step will be to mapthese outlines against texts from the time, through a qualitative close reading.This study has investigated, at least, seven diaries from the time.

Studie av materialhantering på Proton Finishing i Forsheda

The aim with this report was to exam and surveys the internal logistics of Proton Finishing?s production. The basic data should give the company suggestions of more efficient and improved internal logistics. We will also give from our perspective suggestions of improvement, which the company will be able to evaluate.To evaluate these problems we used different kinds of methods. A frequency study was made on the internal forklift.

Grundläggande läs- och skrivinlärning : Är stavelsen en gynnsam arbetseneht?

The aim of this study is to contribute to a better understanding of the syllable as an alternative to the phoneme at the basic reading and writing. This report is based on a qualitative analysis of Håkanstorp school´s approach to the basic reading and writing in class. Their approach to reading and writing is controversial, as it is based on the syllable instead of the phoneme, as usual in the traditional reading and writing. The education result, I have found, is that the syllable leads to a very clear and structured working procedure, which ultimately leads to class teachers being able to work from a diagnostic approach. This structure, with many parts of the course helps educators to clearly follow what level students are at.

Röst och hörselnedsättning : Akustisk analys av röst hos sju hörapparatsanvändare

A number of studies have been made to examine several aspects of voice production in individuals with different types of hearing impairments. Most of the studies were made to explore the impact that hearing aids have for people with severe or congenital hearing impairment. So far it has been confirmed that there are changes regarding voice production in these individuals. A group that has not been investigated regarding voice production to a larger extent are hearing aid users with an acquired hearing impairment. In the present study the voice production of seven individuals, four men and three women, with a moderate acquired hearing impairment is examined.

Välfärd hos växande nötkreatur ? finns den?

During an investigation of animal welfare in animal production, the focus has for a long time been focused on the absence of stress, suffering and injuries, and positive emotions have not been prioritized. However, in recent years that has been drastically changed. The public interest have increased for buying animal products from animals that have had a decent life, which have led to that play, exploratory behavior and other positive behaviours has come to play a significant role in welfare assessment. The welfare of cattle is difficult to assess since there is currently no ancestors to study, it is thus difficult to determine which behaviors can be regarded as natural and thus positively related, acordingly the welfare of cattle have been forgotten and research on positive emotions of cattle have not been prioritized. The aim of this study was to observe which behavior growing cattle performe, and if there was any differences of which kind of behavior that was observed, if the cattle is keept on slatted floor or on a deep straw bedding. Furthermore, antoher purpose was to investigate if the observed behaviours indicate a positive, negative or natural welfare, and if it is possible to use the observed behaviours in a welfare assessment.

Komjölk och kronisk förstoppning hos barn - En systematisk översiktsartikel

Sahlgrenska Academyat University of GothenburgDepartment of Internal Medicine and Clinical NutritionAbstractTitle: Cow?s milk and chronic constipation in children ? A systematic reviewAuthor: Sara Palm & Anna SvenssonSupervisor: Frode SlindeExaminer: Anna WinkvistProgramme: Dietician study programme, 180/240 ECTSType of paper: Examination paper, 15 hpDate: May 27, 2014Background: Chronic functional constipation is common among children. Up to a third of all who seek a paediatrician suffer from constipation and it is a widespread problem for children in many countries. Lately it has been discussed if cow?s milk can be a cause of the constipation and if it should be considered a delayed hypersensitivity.Objective: The aim of this systematic review is to examine whether there is scientific evidence to recommend a cow?s milk-free diet as a potential treatment in chronically constipated children.Search strategy: The literature searches were performed in the databases Pubmed, Scopus and the Cochrane library, using the search terms cow?s milk, constipation, milk proteins, dairy products, milk hypersensitivity, cow milk and cows milk between March 17th and April 4th 2014.Selection criteria: Randomized controlled trials measuring stool frequency in chronically constipated children on a cow?s milk-free diet were included.

Självläkning från ett alkoholmissbruk : En kunskapsöversikt

Syftet med studien var att studera hur fenomenet självläkning framställdes i nationell och internationell forskning. Studien omfattar tre frågeställningar: (1) Hur definieras alkoholmissbruk i artiklarna? (2) Hur definieras självläkning i artiklarna? (3) Hur framställs självläkningsprocessen i artiklarna? För att besvara dessa frågeställningar gjordes en selektiv kunskapsöversikt och en kvalitativ innehållsanalys användes som metod. Kunskapsöversikten utgjordes av tio forskningsdokument vilka omfattades av kvalitativa och kvantitativa undersökningar mellan åren 1996-2007. Studiens position är postmodern.

Spelutveckling och lansering av applikation till Android

For several years Uppsala University together with several companies has been involved in a WISENET project aimed at improving railway transport security. By placing a sensor system near the wheels of each wagon, the temperature of the bearings can be measured and transmitted to a collector placed centrally on the wagon. This in turn transmits the collected data to RFID receivers placed intermittently along the railway.As the signals are transmitted wirelessly, problems may occur as the antennas get dirty or coated with ice and snow. To determine the effects of these coatings, several tests were performed examining the reflection coefficient S11, the impedance Z11 and the efficiency eta of an antenna, and how they varied when various coatings were placed over the antenna. Examined coatings were ice, snow and water to determine the effects of weather, and various metal-based coatings: powdered iron both pure and partially oxidized, and iron ore granules.

Optimering av sotningsfrekvens i biobränsleeldad CFB-panna : panna 5, Mälarenergi AB, Västerås

During the past 30 years the fuels for energy production in heating and power plants have changed. Fossil fuels have decreased in usage whereas bio fuels in Sweden have increased with 60% since the 1970's. Different fuels affects combustion and the release of various substances and particles into the flue gas. This is caused by the diverse components and chemical structures of fossil fuels and bio fuels. When the flue gas leave the combustion chamber and enters the path to the chimney particles in the gas are being transported out of the combustion chamber.

Elanslutning av fartyg i hamn : en studie om förutsättningar och konsekvenser för Köpings och Västerås hamn

The purpose of this thesis is to investigate the possibilities for shore side electricity in the ports of Västerås and Köping. A technical solution to connect the vessels to the local grid is suggested and the investigation is also aiming at an understanding of how the environment is affected by the use of shore side electricity. Furthermore, the costs of shore side electricity are considered.The maximum power demand of a vessel visiting the ports today is relatively small, but the ships visiting the ports in the future might have a larger power demand. The suggested dimension for the system is 5 MW and the result shows that the shore side electricity requires the power distribution to the ports to be expanded. The most useful solution in the ports is to connect the ships with 12 kV from a connection box in a pit at the quay.The investigation of the costs shows that it is cheaper for the ships to use electricity compared to the marine fuel.

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