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694 Uppsatser om Snow properties - Sida 30 av 47
Scenerier i glas - ett projekt om mönstermoduler
The present project was initiated with the aim to create pattern modules for use in public environments. My intention was to let the properties, of the specific materials used, have a marked influence on the realisation of the final form. I also wanted to find a material, which is suitable from the perspective of sustainabilityand possibilities to create modules from it. The work was initiated with a study of some candidate materials and many sketches before I finally made my choice. My decision was clear after a visit to the company Glasfabriken inKalmar.
Implementering av en PSS i Trängslets kraftstation
The purpose of this master thesis is to implement and validate a Power System Stabilizer (PSS) to a generator at Trängslet hydropower station in Dalarna, Sweden. Problems with local rotor oscillations can occur at the hydropower station when power is transferred on a new power line (130 kV) from Northern to Southern part of Dalarna. To ensure good operation properties on this power line Fortum Generation AB and Fortum Distribution AB wants to activate a PSS on a generator.There have been investigations in which situations and what equipment that contributes to rotor oscillations. When this is known the PSS is tuned to damp these oscillations by choosing a good set of parameters. The most important parameters for good performance are to choose amount of gain and phase compensation.
Klimatologisk studie av cyklonbanor över Europa med koppling till snöförhållanden i norra Sverige
ReferatKlimatologisk studie av cyklonbanor över Europa med koppling till snöförhållanden i norra SverigeJakob InghammarUnder de senaste decennierna har temperaturen i atmosfären ökat. En sannolik effekt av detta är en förändring av förekomst och styrka för de utomtropiska cyklonerna. Deras uppträdande spelar en betydande roll för väder och klimat över de områden där de förekommer, därför är det relevant att undersöka om samvariationer för dem existerar med till exempel snöförhållanden och temperaturer. För att utforska detta har lågtryck över norra Atlanten och Europa identifierats ur återanalysdata (ERA-40) under månaderna oktober-mars för åren 1960-1999.Denna studie visar på en signifikant ökning av lågtrycksförekomst norr om 60°N och ett signifikant avtagande söder om 60°N. För lågtryckens styrka påvisas en signifikant positiv trend för båda dessa områden.
Olika källor, samma islam? : En innehållsanalys av porträtteringen av islam och muslimer i läromedel och tidningsartiklar.
The purpose of this study was to investigate how Islam and Muslims are portrayed a) in results from studies on Swedish teaching materials, and b) in articles in Swedish media newspapers. The study was conducted through two separate studies. In the first study, five previous research reports on how Islam and Muslims are portrayed in Swedish teaching materials were analysed in order to discern the main results regarding the portrayal of Islam and Muslims. In the second study, newspaper articles from 11 Swedish newspapers were analysed in order to discern which central themes emerge in the description of Muslims and Islam in said newspaper articles, as well as which properties and features are attributed to Muslims and Islam in the articles studied. In both studies, the data was analysed inductively through a qualitative content analysis.
Genetic diversity of Roseroot (Rhodiola rosea L.) from Sweden, Greenland and Faroe Islands
Roseroot (R. rosea L.) has gained more attention the last years, mainly because of its phy-topharmacologic properties. Even though many reports in roseroot have been published, only a few articles are dealt with the genetic diversity. The Nordic Genetic Resource Center has collected Roseroot material from Sweden, Greenland and Faroe Islands under different expeditions. The samples were analysed to study the genetic diversity study.
Composition of fractions from air-classified wheat flour
The unique ability of wheat to produce leavened bread is mainly due to the gluten proteins present. As consumers are more and more attracted to bread with high fibre content the use of wheat gluten will also increase in order to obtain bread with good volume and appetizing characteristics. Air-classification is a technological method used to separate particles by size and shape by means of air-streams into two fractions, fine and coarse. When used on wheat flour it is known to alter the flour composition in the fractions obtained compared to the original flour. This method is not widely used in the milling industry but could possibly be of interest if protein rich fractions with favorable protein quality can be produced.
Utveckling av Pappersmassestol
The author contacted designers Claesson Koivisto Rune Arkitektkontor in August 2007regarding his Master thesis at KTH. The company had discussed the possibility of creating achair made from molded pulp. The author was taken on as a manager for the project. Theobjective was to produce design documentation for a paper pulp chair which was to belaunched at the in 2008 Milan Furniture Fair. The purpose of the thesis was to develop aproduct with scientific methods as well as to investigate how to make collaboration betweendesigners and engineers easier through communication.The project went through four basic stages: Information, Analysis, Synthesis and Evaluation.Information on paper pulp, molded pulp, chair design, sitting postures and the existingmarket of molded pulp furniture.
Självskattning av depression hos patienter med hjärtsjukdom : Validering av självskattningsformuläret ?Känsloläge?
AbstractObjective: The aim of this study was to investigate the statistical properties of a self-assessment instrument for depression, Känsloläge, with regard to validity, reliability and factor structure. Method: The data collection method used for the study was mail questionnaires. The sample consisted of patients who had received treatment for heart failure, arrhythmic disorders or coronary heart disease at a hospital in Uppsala, Sweden. The study population consisted of 53 patients. The self assessment form?s validity was analyzed by measuring the criterion validity.
Utvärdering av Hultdins prototyp för portabel bro (drivningsbro) :
Stronger demand has been put on forestry to show environmental considerations during harvesting. This is especially for crossings of brooks with sensitive elements and great care should be observed when they are to be crossed during harvesting by logging machines. For that reason Hultdins has constructed a portable bridge that can be used for those occasions. The bridge has been developed in accordance with wishes from SCA forest, since they have a great deal of brooks in their forests and in private forests from where they buy part of their wood supply.
The aim for this report is to investigate if this portable bridge can be of interest for the forestry market. The research has been made at SCA skog in Medelpad and Norrskog in Medelpad.
Platsrelaterat själv och autobiografiska minnnen hos svenskar boende i Schweiz
The aim of this essay is to examine three separate Swedish public libraries and their respective websites on the grounds of the usability sciences. I firstly had to summarize the main properties of the usability-field in order to gain an extended knowledge of its purposes and possible usage for today?s library systems. I was then able to apply the extended knowledge in the examination of the three library websites and the purpose of determining whether or not they were designed according to the standards set by the usability-sciences.Usability is a rather new science that deals with the dissection and examination of computer-based systems, in order to find the key components that make systems user-friendlier. With user needs being the main focus of its research, usability tries to meet all the different needs of the modern user and construct systems that are less system-centered and more user-centered.
Den ena boplatsvallen är den andra lik? : Miljöarkeologisk intra-site studie av boplatsvallar vid Lillsjön, Anundsjö sn., Ångermanland
Boplatsvallar, often translated as semi-subterranean settlements, is an ancient monument with a diffuse definition. Defined as ?embankments that partially or completely surround a often lowered/dug down surface- this category of ancient monuments is also made up of a former category which traditionally was interpreted as winter settlements from the late Stone age in Sweden. This view of the ancient monuments carried over, to a certain extent, to this new definition. Should this be the case, that this category of ancient monuments are remains of winter settlements, used recurringly over an extended period of time, then they should exhibit similar signals in regards to the distribution of the anthropogenically altered soil chemical and soil physical properties at the sites.The area around Lillsjön, Anundsjö parish in Ångermanland, have four boplatsvallar located separately in the regional area.
Solceller pa? Uppsalahems fastigheter : Ekonomisk potential fram till 2030
Uppsalahem is the leading housing corporation in Uppsala with its over 160 real estate properties. Uppsalahem is owned by the municipality of Uppsala, which has a climate and energy goal that aims for 100 MW of solar energy to be installed in Uppsala by 2030. The 100 MW goal, combined with Uppsalahem?s environmental policy, is a strong incentive to investigate the possibility of installing PV modules on the many available roof areas that Uppsalahem possesses. The objective of this thesis is to create a foundation for future decisions regarding PV systems for Uppsalahem.
Ytans djup : Visuell ikonicitet i den grafiska konstformen lyrik
This thesis revolves around an obvious fact: printed (or otherwise two- or three-dimensional) poetry is always and inevitably visual. By analysing a representative selection of poems, including conspicuously experimental and image-like poems as well as examples of more conventional poetry, the thesis points out that visual iconicity is an equally inevitable consequence of the visuality of printed poetry. The analysis applies terminology relating to iconicity and intermediality (presented by Lars Elleström, whose theoretical basis is the semiotics of Charles Sanders Peirce) to the selected poems, while avoiding making too specific interpretations, in order to maintain a discussion of the ever-present phenomenon of visual iconicity as such, and not just the individual examples.Rather than introducing visual iconicity specifically to confirm more or less specific interpretations of poetic texts, this method of approaching poems as two-dimensional works of art is what this paper mainly aims to propose, as a productive starting point for literary analyses in general; as is concluded in the theoretical framework by Elleström, the actual modal and iconic properties of printed poetry contradict mutually exclusive dichotomies such as verbal/visual and text/image. While indirectly visually iconic poems tend to have a wider range of possible interpretations at the outset, the existence of iconic potential, however, does not depend on any specific interpretation..
Sticklingsetablering av Sedum spp. för gröna tak : biokol som organiskt material i substrat
The popularity of vegetated, or green roofs, has grown over the past years due to their potential
function of maintaining urban environment quality. The aim of this study was to investigate if
substrates with different organic material, peat and charcoal, with two contents (3 or 6 weight%)
influenced the growth of the cuttings during the first critical period of the establishment. Biochar is
used as amendment to agricultural soils and has, theoretically, many of the properties suitable as
organic content in green roof-substrates. Peat is one of the materials that is commercially used in
green roof industry. The substrate has been treated with different amounts of water.
Usability för svenska folkbibliotek : En undersökning av svenska folkbiblioteks datorsystem med hänsyn till användarvänlighet.
The aim of this essay is to examine three separate Swedish public libraries and their respective websites on the grounds of the usability sciences. I firstly had to summarize the main properties of the usability-field in order to gain an extended knowledge of its purposes and possible usage for today?s library systems. I was then able to apply the extended knowledge in the examination of the three library websites and the purpose of determining whether or not they were designed according to the standards set by the usability-sciences.Usability is a rather new science that deals with the dissection and examination of computer-based systems, in order to find the key components that make systems user-friendlier. With user needs being the main focus of its research, usability tries to meet all the different needs of the modern user and construct systems that are less system-centered and more user-centered.