
Sökresultat:
2050 Uppsatser om Soil types - Sida 22 av 137
Promotionsarbete med unga i förorten : - En kvalitativ fallstudie av RGRA, Rörelsen gatans röst & ansikte
This studie explores how a promotive youth movement that aims to activate adolescents in economically and socially exposed areas, can affect the youth?s participation in society and oppose their experience of stigmatization. The youth movement, whom is being studied, uses urban art expressions as a mean to engage and motivate the adolescents. The empirism has mostly been collected by a limited participatory observation, and through qualitative interviews with staff and adolescents in the movement. The result has been analyzed through Pierre Bourdieus field theory.
Short-term responses of the field layer vegetation in a south Swedish deciduous forest after establishment of wild boars (Sus scrofa)
Inside the south Swedish national park Dalby Söderskog, wild boars (Sus scrofa L.) have been visiting since 2010. The presence of wild boars has earlier been proven to
impact both soil and vegetation characteristics, both positively and negatively. Still, there is a lack of knowledge regarding the rooting effect on the vegetation in
deciduous forest within the native range. In this study, I have compared the field vegetation collected before and after the invasion of wild boars in 74 permanent experimental plots. More specifically, the study aimed to qualify the effect of wild boar rooting on cover ratio, species richness and species composition in a temperate
deciduous forest.
Historiska emissioner av bly och arsenik till luft från Åfors Glasbruk och deras konsekvenser för miljön.
Åfors glasswork was a company which started in 1876 and closed in 2012 due to the bad economical situation in the company. After its closure, the glasswork left behind contaminated soil with different concentrations of heavy metals such as, arsenic from arsenic trioxide, a chemical used to remove bubbles during the melting of glass, and lead oxide, a chemical used in the production of crystal glass. Crystal glass?s production occurred under 1921-1971, but emissions of lead into the air from Åfors glasswork continued until 2011, because of the artist Bertil Valliens? artglas was made in Åfors glasswork from 1970?s and onwards.The aim of this study was to estimate how much lead (Pb) and arsenic (As) that were released by Åfors Glasswork into the atmosphere during the operational period of the glasswork in comparison with how much of lead and arsenic were purchased for the company. Added to the assistance of the data from National Archives the variations in the activities of Åfors glasswork could be shown.
Folkbibliotekets nya roll i det digitala bibliotekets epok: : om e-böcker, Internetbaserade ljud- och talböcker och förbättrad tillgänglighet till folkbiblioteken i Stockholms län
The digital era has led to technical advances that have transformed the role of the public library from being a place that is used only through physical visits and material, into also being a virtual space that can be accessed by users from outside the library through Internet-based access to e-media such as e-books and streamed or downloadable audiobooks.The aim of this study is to examine how the role of public libraries in Stockholm County has changed in the process of developing into digital libraries: how this has affected their organisation, work methods and strate- gies, as well as their accessibility. The theoretical framework of the study draws on Michael K. Bucklands theory of information accessibility, which is based on six factors of access that are determined by different types of barriers. The methodology is based on a combination of quantitative and qualitative methods. Primary data was gathered through an empirical survey, which consisted of a structured questionnaire distributed to most of the public libraries in Stockholm County and semi-structured interviews with selected librarians and experts for further in-depth understanding.
Förstudie till våtmark i Rimbo : Design för optimal hydrologi och kväverening
The euthropthication of the Baltic Sea is a threat that is beginning to be taken seriously by the governments concerned. In Sweden, regulations concerning the allowed nitrogen (N) concentration in the effluent water from wastewater treatment plants are being tightened up. The Rimbo wastewater treatment plant has been imposed to reduce the annual mean concentration of total N in the effluent water to levels below 15 mg l-1. A more and more common way to reduce the nitrogen level in wastewater is to let the water pass through a wetland. This study investigates the possibility to build this kind of wetland at the outlet of the Rimbo wastewater treatment plant.A prestudy of the topography, soil characteristics and groundwater flow indicates that the land area in question is well suited for the construction of a wetland.
Kvalitetssäkring av markberednings- och planteringsuppföljning hos SCA Skog AB Jämtlands skogsförvaltning :
Quality assurance means to systematically work for better understanding of the customers needs, demands and expectations. The goal for this study was to investigate how quality can be assured in the job follow up that is made by forestry contractors after soil scarification and planting. The study consisted of a description over the current follow up process at SCA forest AB Jämtlands forest administration, analysis of current follow up situation and an investigation of follow up process made by contractors in other line of business.
The first step was a statistical comparison where the own follow up made by contractors were compared with follow up made by SCA them selves over 100 stands. Two soil scarification contractors and two planting contractors carried out the silvicultural measures. The results showed that significant differences between a number of quality factors measured, for example number of approved plants or approved scarification points, average score on stand and number of totally planted plants.
Anlockning och gnag av snytbaggar (Hylobius sp.) : effekt av plantstorlek och behandling med metyljasmonat
Two field experiments were conducted in central Sweden in order to: 1) Determine a relationship between the number of approaching pine weevils (Hylobius sp.) and the number of attacks by pine weevils, in relation to the size of seedlings of Scots pine (Pinus sylvestris). 2) Determine if application of methyljasmonate (MJ) on seedlings of Scots pine will result in higher resistance towards attacks by pine weevils and/or have any effect on the number of approaching pine weevils. The field experiments were designed with two separate parts in close vicinity on the same clear cuttings: a) pitfall traps placed in patches of scarified soil that caught approaching pine weevils at 2.5 cm from the bait, which consisted of different sized seedlings of Scots pine some of which were subjected to application of MJ and b) the same type of seedlings planted out in patches of scarified soil.
The first field experiment was conducted on a 1-year old clear cutting outside Uppsala in east central Sweden and the trapping part of the experiment consisted of 8 blocks with 6 treatments: 1) control, 2) small over-wintered seedling, 3) medium sized seedling, 4) medium sized seedling treated with 0.5 ml 100 mmol MJ 4 days prior to start of experiment, 5) large seedling, 6) vial with 9.5 ml of ?-pinene. The trapping experiment lasted for 6 weeks in the early summer.
Föroreningstransport i grundvatten : En modelljämförelse
This thesis compares different methods for risk assessment of a creosote contaminated site in Vansbro, Dalarna. In a complementary study the importance of using representative data for calibration and validation of stationary groundwater models is discussed. The time dependency between surface water levels and groundwater levels on the site in Vansbro is evaluated by step response analysis. The results show that the groundwater levels reflect only long-term variation in the surface water levels. Hence the use of such long-term means for calibration and validation of the stationary groundwater models is the only theoretically defendable alternative.As a first step in the comparison of risk assessment methods the degree of contamination is evaluated on the basis of generic guideline values for contaminated soils, developed by the Swedish Environmental Protection Agency.
Lärarens ledarroll i klassrummet och vilka faktorer som påverkar : En studie i två högstadieskolor, årskurs 7, 8 och 9
This exam work project strives to investigate different roles a teacher can adapt to in classroom situations. The focus is on three different types, gained from a dissertation made by Evelyn Säll where she has investigated teacher students? opinions about the teacher?s role. These types are:the Dramatist, the Director and the Illuminator, and five teachers are defined accordingly. Questionnaires and observations are used as a tool in order to come to a conclusion.
Barns delaktighet och inflytande : i arbetet med hållbar utveckling i förskolan
The purpose of this study is to compare the conditions for teaching and learning Sami at primary level in three different types of schools. The study focuses on teachers' views on multilingualism and characteristics of good mother tongue education as well as factors inside and outside school affecting teaching. The classroom environment is also discussed. Six qualitative interviews with practicing teachers in the three school forms were carried out: Sami school, integrated teaching and mother-tongue education. The results showed that the teachers are in favour of multilingualism and feel a responsibility to help more children develop their ability to speak Sami.
Att börja från noll. En studie i storstadssatsningens försök att öka det politiska deltagandet hos Malmös invandrare
This thesis title starting from zero alludes to storstadssatsningen's democratic work being accomplished among immigrants in Malmö. My thesis examines which types of political participation storstadssatsningen were trying to increase. The goal was to turn the immigrants into political participants, but in many of the projects the democratic work had to focus on building a ground for democratic participation by bringing isolation to an end and teaching the Swedish language. This may have been the reason that there were not extensive forms of resources to put into projects actually raising the political awareness. Some of the projects can however be said to increase a very large number of types of political participation, both temporary and every day participation.
En studie av zero knowledge-identifikationsprotokoll för smarta kort
Zero knowledge protocols is a lesser known type of protocol that can be used for identification. These protocols are especially designed not to reveal any information during an identification process that can be misused later on, neither by the one who should be convinced of the identity of the user, nor by anyone else that is eavesdropping. Many of these protocols are also especially designed for implementation in smart cards. The more common type of card with a magnetic stripe has during the last few years become more susceptible to attacks since they are easily copied. Smart cards combined with a secure identification protocol has been predicted to be the solution to this problem.
Att expandera sökfrågor i en elektronisk bibliotekskatalog: En jämförelse av återvinningseffektiviteten för fyra olika sökfrågetyper
This Masters thesis deals with query expansion in an online library catalogue. The aim of the study was to compare the retrieval effectiveness of four different query types when applied to the online library catalogue of the University College of Borås. The query types were: an initial query, the initial query with right hand truncation, the initial query expanded with synonyms and finally the initial query expanded with synonyms and right hand truncation. 24 topics were formulated, and four queries for each topic were constructed. The records retrieved by the searches were judged with regard to topicality, and were judged to be non-relevant, partially relevant or relevant.
Hur används vetenskap och forskning i den politiska debatten? : Idéanalys av debatten kring försäkringsmedicinskt beslutsstöd
How is research and science being used in political debate? An idea analysis of the debate about försäkringsmedicinskt beslutsstöd (decision tool in healthcare security)This is a case study on different types of research use (utilization) The aim of this paper is to examine how the politicians make use of expertise and research in the parliamentary debate surrounding the decision tool in healthcare security (försäkringsmedicinskt beslutsstöd). The aim is also to find out to what extent different types of research use are present in this debate. In this case study the qualitative method of idea analysis is being used on the empirical material. The tool of analysis is based upon the theories of research use by Amara et al.
"The Machine Made Me Do It!" : An Exploration of Ascribing Agency and Responsibility to Decision Support Systems
Are agency and responsibility solely ascribable to humans? The advent of artificial intelligence (AI), including the development of so-called ?affective computing,? appears to be chipping away at the traditional building blocks of moral agency and responsibility. Spurred by the realization that fully autonomous, self-aware, even rational and emotionally-intelligent computer systems may emerge in the future, professionals in engineering and computer science have historically been the most vocal to warn of the ways in which such systems may alter our understanding of computer ethics. Despite the increasing attention of many philosophers and ethicists to the development of AI, there continues to exist a fair amount of conceptual muddiness on the conditions for assigning agency and responsibility to such systems, from both an ethical and a legal perspective. Moral and legal philosophies may overlap to a high degree, but are neither interchangeable nor identical.