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4934 Uppsatser om Soil science - Sida 16 av 329
Den tredje vägens ufologi : En studie av vetenskapligt gränsdragningsarbete inom Riksorganisationen UFO-Sverige
The following essay or thesis is a study over scientific endeavors in the fringe. It is a study of Riksorganisationen UFO-Sverige, whose proponents aim to make the UFO phenomenon (or phenomena) a subject of scientific scrutiny. To achieve this, the ufologists first have to redefine common concepts of ufology as pseudo science or religion, mainly by challenging definitions given by scientific sceptics on the one hand, and proponents of conspiracy theories or the new age environment on the other. Thus UFO-Sverige seeks to construct an alternative scientific identity in contrast to adversaries on both sides, each unwilling to give the UFO phenomenon any further examination. Following the work of Tomas Gieryn's sociological grip on questions of epistemology, especially concerning the social boundaries of science from other cultural categories through what has been labelled as epistemic boundary work, during which proponents of a particular field aim to achieve epistemic authority and thus the legitimate right to define what is and what is not science, I seek to analyze how questions of science and legitimacy are actualized in an intellectual environment or culture not broadly accepted as scientific.
Visioner och emfaser i naturvetenskaplig undervisning : En kvalitativ studie om hur en lärare uttrycker ambitioner kring naturvetenskaplig undervisnig och hur dessa tar sig uttryck i praktiken
This study examines a primary school teacher?s ambitions within science education and how those ambitions manifest in the classroom. This is being examined by interview with the mentioned teacher and by observations as a participant within four of the teacher?s science classes. The results of this study is categorized and analyzed with assistance of scientific literacy, vision I and vision II, fundamental scientific literacy and Roberts? curriculum emphases.
Laktester för riskbedömning av förorenad mark :
Using leaching test is a way to get a picture of pollutants retention and leaching in a risk assessment on contaminated land. There are several different types of standardised leaching tests today, where the natural leaching processes are speeded up to make it possible to predict the leaching of pollutants. These leaching tests have been developed for waste and there are no specific guidelines on how to judge the results from the tests, when making a risk assessment on contaminated land. This work is an investigation on how to use leaching test in this type of risk assessments. The strengths and weaknesses of the different types of tests are discussed.
Depending on what type of information you want from your leaching test, different types of tests are suitable.
Utvärdering av koldioxidmätaren Vaisala GMP343 samt sambandet mellan grundvattennivå och koldioxidavgång från torvjordar
The research group Soil and Water Management at the department of Soil and Environment at theSwedish University of Agricultural Sciences in Uppsala are studying greenhouse gas emissions fromcultivated peat soils. To measure carbon dioxide emissions from peat soils in the field the researchgroup are now using two portable carbon dioxide meters (Vaisala GMP343). For practical reasons,they plan to acquire a new type of automated field meter. The aim of this study is to evaluate thepresent meters to see how environmental conditions and instrument settings affect the results,which is meant to facilitate the introduction of the new field meter when the meters needs to becompared. As a part of the study the relationship between groundwater level and carbon dioxideemissions from peat soils will be investigated.The evaluation of the two carbon dioxide meters was made by connecting them to one single airtightsystem, with the aim of creating identical measurement environments.
Bättre åtkomst till avverkningstrakter med anpassat marktryck från avverkningsmaskinerna
The global climate-change means increasing mean-temperature and higher precipitation in Sweden, which leads to shorter periods of frozen ground in the forest. At the same time the harvesting machines are getting bigger and more powerful. The forest industry aim at an even wood flow, and the ground damage has to be as low as possible. The two biggest causes for ground-damage is the bearing capacity of the forest ground and the ground-pressure of the harvesting machines. The aim of this study was to find out some rules for the machine choice considering ground pressure, when harvesting on ground with low bearing capacity.A field study, using a Valmet 890.3 forwarder, was carried out where different ground pressures and their effect on the ground were tested on two different types of ground.Additionally, an inventory of damaged harvesting grounds was made.
Var en sovjetisk rättskultur en del av en europeisk rättskultur?
En sovjetisk rättskultur var delvis i teorin en del av en europeisk rättskultur men i praktisk tillämpning fanns det stora skillnader..
Den statsvetenskapliga diskursen : En innehållsanalys av statsvetenskapliga doktorsavhandlingar 2000-2013
A possible "discursive turn" is believed to have been observed within Swedish political science in later years. The purpose of this study is to examine whether or not such a turn has actually taken place, in order to further determine if a resulting theoretical homogeneity poses a risk to the ability of Swedish political science to identify and respond to its full width of possible research problems, and to determine its perspectives on both these problems and the results that are later communicated to the general society. To do so, the study poses the following primary research question:"Has a discursive turn occurred within Swedish political science?"This question is then broken down into two specified research questions."Has discourse analysis become a more common approach for doctoral dissertations in political science during the period of 2000-2013?""Have ideas corresponding with discourse theory become more common within doctoral dissertations in political science that are not pure discourse analyses during the period of 2000-2013?"These questions are then answered by examining all known 406 doctoral dissertations in political science published in Sweden during the 21st century up until (and including) the year of 2013, using two forms of content analysis, one manual and one computer-assisted. The study finds no clear evidence of a discursive turn in Swedish political science since the turn of the century.
Lodgepole pine - stability after thinning
SCA has today almost 300 000 hectares of their forest land planted with lodgepole pine(Pinus contorta var. latifolia). Due to initial extensive planting in the 1970ies the area oflodgepole pine forests in the thinning age has grown rapidly from the end of the 1990ies.During the years 1996-2005 first commercial thinning of lodgepole pine at SCA took place.The goal of the hereby presented study was to investigate the growth and stability in thosefirstly-thinned lodgepole pine stands a few years after thinning. Furthermore, the objectivewas to investigate the relationship between stand stability and different stand parameters.Additionally, lodgepole pine stem quality was estimated.The study is mainly based on the data collected during an inventory project carried out atSCA in 2008. Altogether 91 lodgepole pine stands in northern Sweden were measured afterthe first thinning.
Naturlig nedbrytning av klorerade lösningsmedel i grundvatten
Chlorinated solvents are common contaminants in soil and water. Under anaerobic conditions microbes are capable of transforming chlorinated solvents into ethylene which would result in a remediation of the contaminated area. In order to use natural attenuation as a remediation method evidence of continuous degradation is required. Furthermore, the degradation must occur at a sufficient rate and continuous monitoring of the site is needed until the demanded levels are achieved. A field study was performed on the basis of data from a dry-cleaning facility contaminated mainly by perchloroethylene.
Om konstruktionen av vetenskap i kriminalserier på TV : En kritisk diskursanalys av CSI och Bones
AbstractTitle: The Construction of Science in Television Crime Shows ? a Critical Discourse Analysis of CSI and Bones (Om konstruktionen av vetenskap i kriminalserier på TV ? en kritisk diskursanalys av CSI och Bones).Number of pages: 45 (50 including enclosures)Author: Lovisa SandbergTutor: Amelie HössjerCourse: Media and Communications Studies DPeriod: Spring 2006University: Division of Media and Communication, Department of Information Science, Uppsala UniversityPurpose/Aim: The aim was to explore the construction of science in the television crime shows CSI and Bones.Material/Method: The method used is critical discourse analysis based on the thoughts of Norman Fairclough. The analysis includes three episodes of CSI and three episodes of Bones,broadcast from between the 10th and 25th of April, in 2006 on Swedish television.Main results: The scientists in CSI and Bones are constructed as rational and calm; they are mainly concerned with finding the truth. On the surface, the truth is objective and reachable, although, in these TV-shows all observations are theory laden.Keywords: CSI, Bones, crime shows, television, science, discourse analysis..
Fodder to ruminants within agroforestry systems in Rwanda - species and management
Rwanda is one of the poorest countries in the world and about 70-80 % of the population lives in rural areas. The land is strongly affected by land erosion which makes it difficult for the agriculture and food production. Agroforestry is a system where tree plantation is combined with livestock- and crop production. The system provides soil fertilization and binds the soil together. Some of the trees used in agroforestry systems are also used as fodder.
"Det är roligt!" : En studie om hur pedagoger använder estetiska lärprocesser i arbetet med naturvetenskap i förskolan
The purpose of this thesis is to investigate how teachers perceive that they work with science in preschool through aesthetic learning processes as tools both in the indoor and outdoor environment and make visible what the educators' underlying beliefs are that affect how they perceive aesthetic learning processes as tools used to deepen children's understanding of different scientific phenomena.This is an interview study using the phenomenographic approach as a means and method to make visible and report on teachers' views on how aesthetic learning processes can be used to extend preschool children's learning about science. The results are analyzed and discussed based on John Dewey's theoretical ideas about children's learning, aesthetics and science.The study clearly shows that teachers' views on aesthetic learning processes and how they can be used in the work whit science is very divided and in some cases unreflective. The most striking results are that teachers often are unaware that they make use of aesthetic learning processes because they have a more limited view of what it is than we have in the paper. All informants have science as a core subject. Their focus of the activity is located at the showing and visualizeing of scientific phenomena and some of them express that they submit the aesthetic learning processes to their colleagues or that they collaborate with someone who has training in some art form.
Katalogisering och presentation av film på bibliotek
The aim of this thesis is to discuss selected parts of cataloguing both from a practical and a theoretical viewpoint. It presents the basic grounds for cataloguing of printed as well as non-printed materials. The focus lies on the main entry heading and its author/title problem concerning film. The thesis theoretical part consists of an analysis of central documents dealing with the author concept from both a library- and information science perspective and a film science perspective. The practical part consists of interviews from two Swedish public libraries, which have different approaches on presenting films.
Universeum är mer än ett komplement till den vanliga undervisningen
Science center har visat sig vara en utmärkt plats för undervisning. Detta är en studie av på vilket sätt ett skolbesök på ett science center kan bidra till att målen för år 9 uppnås och om ett besök på ett science center kan utgöra ett komplement till den vanliga skolundervisningen. Särskilt studeras ämnesområdet astronomi och kosmologi (universum och vårt solsystem) i ämnet fysik. Undersökningen är gjord på Universeum i Göteborg. Metoden i undersökningen är intervjuer och observationer.
Artbrott -en institutionell bastard i gränsskiktet mellan statsvetenskap och juridik?
This paper deals with a partly new development in the Swedish law system, somewhere in the boundary between political science and jurisprudence. A new instrument -artbrott- has successively become more popular among lawyers and politicians. The new instrument -here translated to classified crimes- signifies that the perpetrator is sentenced to prison even though the seriousness of the crime committed is not in itself serious enough for such a consequence. The reason for this policy stance is to create a prevention against crime of that specific character among the public. The use of this instrument has grown considerably both concerning types of crimes as well as in application.