Sökresultat:
175 Uppsatser om Velocity zones - Sida 7 av 12
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.
En jämförande studie av fluiddynamiken för olika fluidiseringsmedium i en kallmodell av en 100 kW-anläggning för kemcyklisk förbränning
To reduce emissions of carbon dioxide (CO2) Carbon Capture and Storage (CCS) technologieshave been developed. Chemical Looping Combustion (CLC) is a CO2 capture technologywith the CCS framework, and at Chalmers University of Technology in Gothenburg,Sweden, a 100 kW chemical looping combustor has been built.This project aimed to investigate to what degree air can replace helium as the uidizinggas for uid dynamical studies in a CLC cold ow model of the above mentioned 100 kWfacility. Experiments were performed using air and helium separately as uidizing gas andpressure data were obtained, which formed the basis for the comparison. The project alsoaimed to investigate uid dynamics in the uidized bed and study when the risk of sluggingoccuring was greatest. The results were presented in the form of figures and tables dividedinto pressure, concentration and standard deviation of the pressure.The results obtained showed that air as uidizing gas did not create the same uid dynamicsas helium over the entire fuel reactor.
EGEN ZON - Rumsgestaltning för barn nio till tolv år på Stadsbiblioteket i Halmstad
Spatial design for children nine to twelve years old at the Halmstad City Library. An investigation about the specific needs of the target group and how the child department can be designed to stimulate their experience of visiting the library. The aim was to create a spatial concept from the children?s ideas that inspires to playfulness and lust to read at the library. A more personal goal was to collaborate with an external part to prepare for my future role as a designer within child culture.
Avvikelser i energiprestanda
Calculated and measured energy in residential buildings is going to differ. The reason to this may be due to many factors. In this study there is a study on how these factors affect the energy use in a building. To get an insight in what defines energy, there is first a description of energy supply both worldwide and used in Sweden, followed by a description of the energy balance. In this study energy will be studied in residential buildings only.
Svensk Affärsetablering i Kina -en fallstudie av Shanghai Waigaoqiao Free Trade Zone
Shanghai Waigaoqiao Free Trade Zone är geografiskt utmärkt placerad vid bedrivande av handel och utgör idag en internationell hub. Området har också tillgång till en god infrastruktur som ständigt förbättras. Waigaoqiao erbjuder sakkunniga konsulter och har ett starkt styrelsestöd. I framtiden då Free Trade Zones inte kommer att vara det enda valet för svenska företag som vill etablera sig i Kina, utan att behöva ingå joint ventures eller liknande avtal, kommer Waigaoqiaos handelsbefrämjande miljö att vara avgörande vid ett etableringsval i just det området. De skattefördelar och tullfördelar som idag existerar i Waigaoqiao kommer att försvinna när Kinas WTO-avtal i sin helhet träder i kraft.
Översyn av vattenskyddsföreskrifter med tillhörande vattenskyddsområde i Hallstahammars kommun. : Vilka revideringsbehov finns?
Water is an important food and an important natural resource. In order to protect these are the Environmental Code and the EU directive given to water protection and related water protection regulations will be established for all water sources until 2010. Those who will prepare a water protection and related water protection regulations is the municipality or person responsible for water supply. The person then decides and declares the area as water protection and related water protection regulations are municipal or provincial government. The idea of creating a water protection is to protect the water supply and the body of water against pollution caused by point sources, diffuse sources and accidents combined.
Förståelsen av interkulturell pedagogik : En studie om förståelsen före detta Södertörnstudenter har gällande den interkulturella pedagogiken och om de använder den i arbetslivet
The purpose of this study is through a teacher perspective gain insight to the knowledge former Sodertorn teacher students possess of intercultural pedagogy and if they use it at work. The studies main perspective is the intercultural perspective, which has been the study's lead perspective. This study also made use out of a sociocultural perspective as it fits with the intercultural perspective and puts its mark in the study.This study has used interviews for data collection. Five former Sodertorn teacher students were interviewed, the interview participants work as teachers. These five teachers? experiences and statements were the focus of this study, the teachers had to demonstrate their intercultural skills and how they use these skills in their classroom.
Kultur och ekologi i Amazonas: GIS-bearbetning av historiska data om indianfolkens utbredning
This study deals with some contested issues regarding prehistoric cultural development in Amazonia and the colonial impact on the native inhabitants of the area. It focuses on the relation between groups belonging the language families of Tupí and Gê, on one hand, and the different ecological zones that they inhabit, on the other. GIS mapping is used to visualise the distribution and movements of these groups in relation to ecology and the impact of European colonization. GIS is shown to be a useful methodology for analysing historical data derived from written sources and maps. The results of these analyses are discussed in the light of different theoretical perspectives.
Comparative analysis of Thermal Barrier Coatings produced using Suspension and Solution Precursor Feedstock
The research work performed in this thesis has been carried out at the Production Tech-nology Centre where the Thermal Spray research group of University West has its work-shop and labs.This research work has been performed in collaboration with the International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Hyderabad, India.First of all, I would like to express my sincere thanks and gratitude to my supervisors Dr. Nicolaie Markocsan and Dr. Nicholas Curry for their guidance, great support and valuable suggestions without which this work could not have been possible. I would also like to thanks Prof. Per Nylén for keeping faith in me and providing me an opportunity to work at PTC, which is a great place to perform research.
Fosforläckage från växtodling - orsaker och ågärder :
Phosphorus is essential to all plants and is taken up from the soil as the ion H2PO4 - (and to some extent HPO42-). Plant availability depends on, among other factors, the soil pH. In order to provide for plant available phosphorus, it is applied as mineral fertilizers and farmyard manure. However, that causes phosphorus leaching from arable land to surrounding surface waters and lakes and contributes to the eutrofication. There are three types of soils in Sweden that are at higher risk of contributing to phosphorus leakage.
Häckar för Norrland
I have observed that hedges are not as prevalent in gardens in the north of Sweden as in the south despite a number of beneficial qualities attached to their use. Consequently, the primary purpose of this essay is to examine the potential for the use of ligneous or woody plants as hedges in a cold climate. The aim of this study is to provide information about the various varieties of ligneous plants that can be used for both pruned and unclipped hedges in the north of Sweden. Because the hardiness of the ligneous plants is a vital factor here, only plants that are hardy enough to survive in the Swedish hardiness zones V to VIII are included in this study. Roses, dwarf shrubs, conifers, bushes with a final height of less than 1 metre and plants that ?bleed? have been excluded.
Doing Business in China - A Best-practice Model for Foreign Invested Small and Medium-sized Enterprises (SMEs)
Foreign invested SMEs have recently become increasingly interested in China. The enterprises are in this report categorized as second wave companies since they follow the footsteps of previous pioneers, of which mostly were larger companies. The ambitions of the SMEs are either to sell products on the ever expanding Chinese market or to utilize the potential of low cost production for global markets. The existing literature is fragmented and solely based on the experience of larger companies. We believe that SMEs are facing new and different challenges, and thus a new generic theoretical frame work is desirable.
The dynamics behind Consistency: Case study on NTT Group and Deutsche Telecom
The main aim of this thesis is to investigate the implications and dynamics behind consistency between individual resource allocation decisions and corporate strategy concept. The telecom industry, a high-velocity environment going through an extensive deregulation process, is put under the magnifying glass. Japanese telecom giant NTT Group is compared to its German counterpart Deutsche Telekom. Potential antecedent factors in the strategic decision-making process to consistency are studied. It is also examined whether there is a direct interplay between consistency and economic performance.
Doing Business in China - A Best-practice Model for Foreign Invested Small and Medium-sized Enterprises (SMEs)
Foreign invested SMEs have recently become increasingly interested in China. The enterprises are in this report categorized as second wave companies since they follow the footsteps of previous pioneers, of which mostly were larger companies. The ambitions of the SMEs are either to sell products on the ever expanding Chinese market or to utilize the potential of low cost production for global markets. The existing literature is fragmented and solely based on the experience of larger companies. We believe that SMEs are facing new and different challenges, and thus a new generic theoretical frame work is desirable.
Hägnutnyttjande hos Aldabrasköldpaddor (Geochelone gigantea) på Parken Zoo
Reptiles are animals than have been neglected in the research for all times. Some people have the opinion that these animals have fewer needs and demand less from their caretakers. The Aldabra Giant Tortoise lives on the Aldabra atoll outside the coast of Tanzania. The Aldabra tortoise population has varied throughout the years, but today the population is around 100.000 animals.
The purpose of this study was to analyze the enclosure utilization of two Aldabra tortoises, a male and a female, at Parken Zoo in Eskilstuna, Sweden.