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7936 Uppsatser om Environmental studies - Sida 54 av 530
Miljöredovisning : En studie kring varför börsnoterade företag som associeras med en betydande miljöpåverkan väljer att redovisa på ett visst sätt
Bakgrund:Miljöredovisningen är ett sätt för företagen att beskriva sitt miljöarbete. Den har fått allt större betydelse för företagen i takt med att miljöfrågorna blivit allt viktigare hos intressenter och allmänheten. Det gäller för företagen att visa att man tar ett miljö- och samhällsansvar för att skapa trovärdighet och förtroende i samhället. Syfte: Att ge läsaren en bild över hur och varför miljöredovisningen ser ut som den gör och vad företagen, som associeras med betydande miljöpåverkan, väljer att fokusera på i sina miljöredovisningar. Metod: En kvalitativ studie som grundar sig i legitimitetsteorin och institutionell teori har utförts. Vi har undersökt litteratur, vetenskapliga artiklar, miljöredovisningar samt fört intervjuer med personer som har behörig kompetens. Slutsats: Studien visar på hur viktig miljöredovisningen är för företagen som associeras med betydande miljöpåverkan.
Tetratermmodellering och regressionsanalyser mellan topografi, tetraterm och tillväxt hos sitkagran och lärk : en studie i norra Island
This study was made in an attempt to give the forest research centre Mógilsá a producedtetratherm map and a better understanding of how topography and temperature influencethe growth of two tree species. The digital tetratherm map model, covering the northernpart of Iceland, was developed to investigate the correlation between tetratherm and thegrowth of Picea sitchensis and Larix (sukaczewii + sibirica). The study confirms theusefulness of digital terrain models in providing data for a lot of different factors and forthe tetratherm model. Hopefully will this tetratherm map be used in future studies.Secondly, investigations were made correlating the growth of the two species againsttopographic factors representing height above sea level, distance to the sea, slope andtopex. Thirdly, investigations were made comparing the aspect and the ground shape tothe growth.The growth rate of Larix had strong significant correlations to the tetratherm and thedistance to the sea- factors.
Ärtrev som substrat för biogasproduktion : En litteraturstudie och rötning i labbskala
Until 2020, 49% of Sweden's use of energy must derive from renewable sources. Greenhouse gases must as well decline with 40% compared to 1990 as a part of Sweden's 16 environmental objectives. Biogas is part of the effort to achieve these objectives, but as the demand for biogas increases, more substrates are needed to meet the demand. The purpose is to investigate the conditions for pea residue as substrate by performing lab-scale mesophilic digestion with different fractions and notch lengths and then to summarize pea residue as a substrate for biogas production. During anaerobic digestion, 1000 ml bottles were used as reactors for digestion.
Verktygsanvändning som miljöberikning för gulbröstad kapucin (Cebus xanthosternos)
That animals should be able to express their natural behaviours, even in captivity, has become a more important issue lately. Nowadays Zoos work much more with educating people and helping conservation projects for endangered species. This is two important reasons for making the environment as natural as possible for zoo animals. Both in captivity and in the wild capuchin monkeys have been seen to use tools such as stones and sticks to get food and are therefore seen as a natural and important behaviour for them.
This study was carried out to evaluate a specific sort of environmental enrichment where a group of three capuchins had to use sticks to get different kinds of food out of bottles.
SAMMANS?TTNING AV MAKROALGER I SVENSKA ?LGR?S?NGAR eDNA sp?rning och klimatf?r?ndringar
The aim of my bachelor?s thesis is to investigate, through a literature review, changes in the
distribution of filamentous algae as well as the general species composition of macroalgae
and diatoms in Swedish eelgrass meadows. I have also studied the possibility of tracking
these algae and diatoms in eelgrass meadows using eDNA methodology. The focus has been
on linking these changes to climate change factors such as eutrophication, temperature
increase, and anthropogenic emissions, and how these affect the health of eelgrass meadows
and their ecosystem services, such as a carbon sink and biodiversity support.
The results show that filamentous algae have increased markedly in coverage in Swedish
coastal areas between 1980 and 2021, especially in sheltered bays, indicating that altered
environmental conditions favor these fast-growing species. Genetic tracking using eDNA
demonstrated that there are functional primers for many species, particularly among brown
algae and red algae, whereas green algae require more specific primers due to greater genetic
variation.
En studie om miljöklassningssystemet CEEQUAL : Civil Engineering Environmental Quality Assessment and Award Scheme
Syftet med examensarbetet är att främja den hållbara utvecklingen i anläggningssektorn. Målet med rapporten är att visa hur miljöklassningssystemet CEEQUAL kan förbättras samt hur användningen kan främja hållbar utveckling i mark och anläggningsprojekt i Sverige. CEEQUAL är ett miljöklassningssystem inom infrastruktur och anläggning som har utvecklats i Storbritannien av Institution of Civil Engineers. I examensarbetet har följande frågeställningar undersökts: Hur fungerar CEEQUAL i praktiken? Vad är den svenska erfarenheten från användningen av CEEQUAL? Hur kan anläggningssektorn förbättra miljö/hållbarhetsarbetet genom miljöklassning med CEEQUAL? Hur kan man förbättra miljöklassningssystemet CEEQUAL? Frågorna har besvarats genom metoderna litteraturstudie och dokumentanalys men även genom intervjuer med olika aktörer inom anläggningsbranschen. Denna rapport innehåller en kort sammanfattning av vad hållbar utveckling betyder och en fördjupning inom miljöklasscertifieringssystemet CEEQUAL samt dess användning inom anläggnings- och infrastrukturprojekt. En jämförelse mellan CEEQUAL, de 16 nationella miljömålen och Kretsloppsrådets mål har också utförts för att se om de behandlar samma miljöområden. En certifiering sker i flera olika steg. En certifiering genomförs av en utbildad assessor som bedömer och ger poäng på svaren av frågorna som återfinns i CEEQUAL:s manual.
Lantbruket som energiproducent : tekniska, ekonomiska och miljömässiga förutsättningar för fjärrvärmeproduktion med lokalt skogsbränsle
A third party access to district heating networks has been proposed in Sweden, to increase the competition
on the district heating market. Such third party access could create opportunities for the agricultural sector
as an energy producer. This study describes the technical, economical and environmental prerequisites for a farmer cluster to build and run a heating plant, fueled with local wood fuel.
The heating plant in the described scenario is 8 MW and will supply a village of 1000 houses, and is fueled with wood chips exclusively. Supplying a heating plant with fuel puts high demands on the logistics, since there need to be a continuous flow of fuel. In the scenario, wood residues from felling and thinning is stored in stacks in the forest, and a few times a year chipped and transported to a storage area at the heating plant.
In the study, an estimation of the profitability has been made by estimating the cost of the investment,
personnel, operating and maintenance costs and costs for the fuel and ash handling.
Småhuset ? val av bergvärme, fjärrvärme eller pellets
This thesis describes the new construction of a small house and it includes studies of three heating systems: geothermal heating, district heating and pellet. The purpose of this thesis is to project a small house which can manage Building Regulations, BBR conditions and then examine three possible heating systems for the small house. This thesis is a literature study which gives an understanding of the heating systems technical structure, properties and costs. An empirical study completes the literature study by giving a deeper understanding of district heating costs and pellet costs. The empirical study contains two interviews, one of which was conducted in a district heating corporation and the other interview was conducted in a pellet corporation.
Gjutfel och dålig ornamentik - Om bronsgjutares hantverksskicklighet under skandinavisk bronsålder.
The purpose of this essay is to investigate whether bronze workers during the Bronze Age were exclusively specialized, or there actually existed amateur craftsmen. Through archaeological experiments and artefact studies I intend to investigate if it has been at all possible for a less experienced bronze caster to produce usable objects. The purpose is also to investigate and put to the test the casting methods used during the Bronze Age in an attempt to find out which steps of the craft are the difficult and crucial ones, and try to determine if it has been possible to manufacture bronze objects on an industrial level..
Vattenapeteorin: Paradigmskifte eller pseudovetenskap?
The Aquatic Ape theory was first formulated by Alister Hardy in year 1960. All from the beginning the theory has been criticized, ridiculed, ignored and a source to strong feelings in the anthropological community. The purpose of this essay is to investigate why the Aquatic Ape theory is so controversial and why it is understood so differently by scientists. After interviews with Swedish scientists and the general community, and after reading of anthropological books, I have tried to show that the aquatic ape-coldness depends on it challenging nature against the anthropological paradigm, which describes human beings as strong, hunting creatures who can live in any environment. The Aquatic Ape theory - on the other hand - picks out one of all these environments and says: "here has our evolution occurred: we have been aquatic apes".
Passivhus, detaljutformning och dess köldbryggor
Along with rising energy prices and increasing awareness of environmental issues, the criteria for buildings energy performance have been sharpened through the years. Today, ?passive house? and ?low energy house? are commonly used phrases in the construction industry and is expected to become increasingly common in the future.For houses with well-insulated building envelope the importance of well constructed details increases when minimizing the heat losses. Examples of these details are floor-wall junction and window openings in the wall. In such connections thermal bridges occur, which means that heat more easily is transported out of the building, compared to the rest of the building envelope.This report deals with detail solutions around windows and a comparison between a traditional slab and a foundation from Koljern consisting of foam glass.
?Det a?r inte viktigt att jag ska vara absolut ba?st, men jag vill vara ba?ttre a?n de flesta? : En kvalitativ studie om juriststudenters subjektiva upplevelser av krav och stress
AbstractTitle: It is not necessary to be the best, but I don?t want to be average Author: Maja Benca & Emma Ender Tutor: Hedvig EkerwaldPurpose: The purpose of this thesis was to identify the subjective experiences of stressors and demands of law students of Uppsala University. Beyond these problems, this thesis was also identifying if there was a balance or conflict between social life and studies from a social psychological perspective. This essay is based on five key questions: How does the subjective experience of stress and demands affect the interviewed law students? How do the interviewed law students handle the stress and demands in their studies and in everyday life? Do the interviewed law students consider there is a balance between social life and studies? How do the law students want to present themselves in front of classmates and teachers? What do the interviewed law students consider to be the main goal in life? Method/Material: The material used in this thesis consists of a total of ten interviews with law students of Uppsala University, five women and five men in the ages of 20 - 32.
En studie av hållbara alternativ till odlingstorv : - vid jordförbättring inom trädgård
Pharmaceuticals are environmental pollutants that are a major threat to aquatic ecosystems and very little is known about their ecological consequences. In this study growth, survival and behaviour (sociability, activity and boldness) of perch fry (Perca fluviatilis) were examined in order to study the possible effects of exposure to a benzodiazepine anxiolytic drug, Oxazepam, during embryonic development. The study tested following hypotheses: (1) perch growth is affected positively by exposure during embryonic development; (2) early perch survival is affected positively by exposure during embryonic development; and (3) boldness and activity increases while sociability decreases in perch fry exposed during embryonic development. Embryos of naturally spawned perch were exposed to water with two different concentrations of Oxazepam. The embryos were exposed during different parts (24-hour periods) of the embryonic development, because embryos may be more vulnerable at certain times during embryonic development and/or because the exposure at different times can produce different effects.
Multimedia eller inte multimedia, det är frågan.
Is it possible, and suitable, to use multimedia in classic literature studies at Swedish upper secondary school? What alternatives are there? Is there any foundation in the curriculum for an expanded conception of text as in multimedia? Will the conception literacy support use of multimedia in classic literature studies, and in what ways? How do we generally look upon the definition text, is it only printed letters, or something more? To get an answer to the questions we decided to examine a number of theories, Gardner?s theory about the different intelligences, the conception literacy and the expanded text concept. In these three theories we took our starting-point for the following work. The main subjects became two interactive sights on Internet and one CD-ROM, all containing classic literature. Our previous knowledge in this subject field was very meager. This work has given us an opportunity to discover some of the multimedia that is available, and the result we have come to is that multimedia absolutely belongs in studies of classic literature as well as in other subjects.
Kvinnlig Könsstympning : Litteraturstudie om praktisk handläggning och komplikationsrisker vid förlossning
Today around 28 000 women originally from countries where FGM is practised, are living in Sweden. Many of them are at childbearing age which means that knowledge about FGM and its consequences is of outmost importance during delivery. The aim of this study is to describe current research on how to manage the delivery, regarding deinfibulation and the following stitching as well as the risk of complications when the labouring woman is mutilated. This review of literature is based on 12 scientific articles published between years 1989 ? 2005.