sh.sePublications
Change search
Refine search result
45464748 2351 - 2366 of 2366
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • harvard-anglia-ruskin-university
  • apa-old-doi-prefix.csl
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 2351. Zillén, Lovisa
    et al.
    Conley, Daniel J.
    Andrén, Thomas
    Södertörn University, School of Life Sciences.
    Andrén, Elinor
    Södertörn University, School of Life Sciences.
    Björck, Svante
    Past occurrences of hypoxia in the Baltic Sea and the role of climate variability, environmental change and human impact2008In: Earth-Science Reviews, ISSN 0012-8252, E-ISSN 1872-6828, Vol. 91, p. 77-92Article in journal (Refereed)
    Abstract [en]

    The hypoxic zone in the Baltic Sea has increased in area about four times since 1960 and widespread oxygen deficiency has severely reduced macro benthic communities below the halocline in the Baltic Proper and the Gulf of Finland, which in turn has affected food chain dynamics, fish habitats and fisheries in the entire Baltic Sea. The cause of increased hypoxia is believed to be enhanced eutrophication through increased anthropogenic input of nutrients, such as nitrogen and phosphorus. However, the spatial variability of hypoxia on long time-scales is poorly known: and so are the driving mechanisms. We review the occurrence of hypoxia in modern time (last c. 50ᅵyears), modern historical time (AD 1950-1800) and during the more distant past (the last c. 10ᅵ000ᅵyears) and explore the role of climate variability, environmental change and human impact. We present a compilation of proxy records of hypoxia (laminated sediments) based on long sediment cores from the Baltic Sea. The cumulated results show that the deeper depressions of the Baltic Sea have experienced intermittent hypoxia during most of the Holocene and that regular laminations started to form c. 8500-7800ᅵcal. yr BP ago, in association with the formation of a permanent halocline at the transition between the Early Littorina Sea and the Littorina Sea s. str. Laminated sediments were deposited during three main periods (i.e. between c. 8000-4000, 2000-800ᅵcal. yr BP and subsequent to AD 1800) which overlap the Holocene Thermal Maximum (c. 9000-5000ᅵcal. yr BP), the Medieval Warm Period (c. AD 750-1200) and the modern historical period (AD 1800 to present) and coincide with intervals of high surface salinity (at least during the Littorina s. str.) and high total organic carbon content. This study implies that there may be a correlation between climate variability in the past and the state of the marine environment, where milder and dryer periods with less freshwater run-off correspond to increased salinities and higher accumulation of organic carbon resulting in amplified hypoxia and enlarged distribution of laminated sediments. We suggest that hydrology changes in the drainage area on long time-scales have, as well as the inflow of saltier North Sea waters, controlled the deep oxic conditions in the Baltic Sea and that such changes have followed the general Holocene climate development in Northwest Europe. Increased hypoxia during the Medieval Warm Period also correlates with large-scale changes in land use that occurred in much of the Baltic Sea watershed during the early-medieval expansion. We suggest that hypoxia during this period in the Baltic Sea was not only caused by climate, but increased human impact was most likely an additional trigger. Large areas of the Baltic Sea have experienced intermittent hypoxic from at least AD 1900 with laminated sediments present in the Gotland Basin in the Baltic Proper since then and up to present time. This period coincides with the industrial revolution in Northwestern Europe which started around AD 1850, when population grew, cutting of drainage ditches intensified, and agricultural and forest industry expanded extensively.

  • 2352. Zinovyev, Pavel V.
    et al.
    Karlsson, Natalia
    The constructing of difference schemes of calculations in dynamic of elastic medium with use of radial front asymptotics2002In: Advanced Problems in Mechanics 2002.: Proceedings, St.Petersburg: Russian Academy of Sciences, 2002, p. 672-677Conference paper (Refereed)
  • 2353. Zuckerman, Oren
    et al.
    Ullmer, Brygg
    Holmquist, Lars Erik
    Ishii, Hiroshi
    Fitzmaurice, George
    Rogers, Yvonne
    Mackay, Wendy
    Rodden, Tom
    The state of tangible interfaces: projects, studies, and open issues2006In: CHI ’06 extended abstracts on Human factors in computing systems, New York: ACM , 2006, p. 61-64Conference paper (Refereed)
  • 2354.
    Zurek, Karolina
    Södertörn University, Centre for Baltic and East European Studies (CBEES).
    Regulating Food Trade in the Enlarged European Union2013In: Balancing between Trade and Risk: Integrating Legal and Social Science Perspectives / [ed] Marjolein B. A. van Asselt, Esther Versluis, Ellen Vos, London: Routledge, 2013, p. 15-32Chapter in book (Other academic)
  • 2355.
    Åberg, Dagny
    Södertörn University, Teacher Education.
    Den som leker med elden kan bli bränd: Rimlighetsbedömning i årskurserna 1 och 32019Independent thesis Advanced level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This paper investigates the theoretical meaning of plausibility in mathematics from a teacher’s perspective. The study applies a phenomenographic research approach and uses empirical content analysis. The theory used comes from the writings on plausibility assessment from McIntosh (2008). Furthermore, Karlsson & Kilborn’s (2015) and Kilpatrick, Swafford & Findell’s (2001) writings on mathematical modeling has been applied. The data gathered in this study comes from interviewing 6 teachers. The results show that teachers in the study do not work explicitly but rather work implicitly with assessment in plausibility as a complement to their general teaching of mathematics. The results further show that the teachers have the mathematical knowledge and competence to educate in plausibility but that they lack the theoretical- and didactic knowledge to apply it in their teaching. There is also very little research, if any, in this area which is a concern for the development of teaching plausibility assessment.

    Download full text (pdf)
    fulltext
  • 2356. Åqvist Almlöv, Maria
    et al.
    Hammer, Monica
    Södertörn University, School of Life Sciences.
    Changing Use Patterns, Changing Feedback Links: implications for Reorganization of Coastal Fisheries Management in the Stockholm Archipelago, Sweden2006In: Ecology & society, ISSN 1708-3087, E-ISSN 1708-3087, Vol. 11, no 2, p. -24, article id 3Article in journal (Refereed)
    Abstract [en]

    Property rights are important institutions for regulating the use of valuable natural resources from coastal ecosystems. In this case study, we identify and analyze property rights and user patterns related to small-scale coastal fisheries in the Stockholm Archipelago, Sweden. User patterns and user groups have changed significantly over the last century, as commercial fishing has been increasingly replaced by recreational activities. Interviews with local resource users and owners of water properties in two different areas, Möja and Ornö parishes within the Stockholm Archipelago, revealed a very diverse pattern of property and user rights, with a large number of water and fishing rights owners. Recreational fisheries, including both sport and household fishing, seem to predominate in both areas, but ownership differs. In Möja, most waters are collectively owned, whereas in Ornö, individual ownership predominates. Very few examples of local influence on fisheries management were found in either area, although the social structure for joint management does exist in Möja. Instead, larger-scale institutions at the regional, national, or international level regulate fisheries, often not addressing local conditions and fish populations. The ongoing shift in resource use has created a heterogeneous user group, and the limitations of centralized management authorities in dealing with the diversity in the coastal ecosystem have created mismatches within the social–ecological system. Combined with a large-scale decline in coastal fish stocks, these mismatches challenge the existing local property rights arrangements as well as the more centralized regulatory management structure. A key issue for fisheries management is how to develop and stimulate appropriate distribution of management functions at different geographical scales and organizational levels. The complexity and diversity in archipelago fisheries call for multilevel arrangements and cross-scale coordination, and initiatives have been taken by both central governmental authorities and local user groups to collaborate concerning habitat restoration and protection of important spawning grounds.

  • 2357.
    Årnell, Tobias
    et al.
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Media Technology.
    Stojanovic, Nikola
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Media Technology.
    Horror game design – what instills fear in the player?: A study on the effects of horror game design theories and level design patterns on player behaviour in a horror environment.2020Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This research paper aimed to study how to make a scary horror game and what in turn makes these games scary. This study utilizes an original game called The House specifically designed and created by us. This is done in order to study the effects of implementing level design and navigation patterns and horror game design theories in an original horror game on player behaviour and reaction in relation to these theories. The study was done with the use of 10 participants, who each took part in a 15 minute play session, and were later interviewed using the data gathering method stimulated recall. The result of the study shows that level design had no significant effect on the amount of fear that the participants expressed. The implementation of proven horror game design theories proved successful at contributing to the general horror experience, and combining elements of level design and horror game theories in horror game design proved successful at scaring the participants.

    Download full text (pdf)
    fulltext
  • 2358.
    Åslin, Evelina
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies.
    Förvaltning av biodiversitet: En studie om natur- och parkområdet Tantolunden i Stockholm2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    My study addresses how the park Tantolunden in Södermalm, Stockholm, is administrated from a perspective directly concerning biodiversity. The purpose of my research is to understand how the Stockholm Municipal District administration handels the green area and the ways in which the stewardship and enviromental arrangements of the area relate to its genral biodiversity and environmental status. I conducted field research in which three inventory spaces, 100 squared metres each, were examined in an attempt to discern the amount of plant species within the area and in connection to the larger area in which the search for four chosen biodiversity indicators were also done. These three areas were given the names Rocky area, Traditionally managed park area, and Gardening area, after the way they’re administrated. According to the results of this study the Rocky area has the richest biodiversity in regards to the chosen biodiversity indicators, but not the amount of plant species. The Gardering area had the most plant species but not many biodiversity indicators. The Traditionally managed park area had a lower biodiversity than the other two areas and also the lowest amount of species, which indicates that this part is administrated without significant deference to biodiversity. The results are connected to the theories accosiated with the Administration’s rationality and the two swedish environmental objectives A rich plant and animal life and A good building  environment. My study indicates that the Stockholm Municipal District administration do not fully uphold Sweden’s greater environmental objectives.

    Download full text (pdf)
    Förvaltning av biodiversitet
  • 2359. Åslund, F.
    et al.
    Berndt, Kurt D
    Karolinska Institutet.
    Holmgren, A.
    Redox potentials of glutaredoxins and other thiol-disulfide oxidoreductases of the thioredoxin superfamily determined by direct protein-protein redox equilibria1997In: Journal of Biological Chemistry, ISSN 0021-9258, E-ISSN 1083-351X, Vol. 272, no 49, p. 30780-30786Article in journal (Refereed)
    Abstract [en]

    Glutaredoxins belong to the thioredoxin superfamily of structurally similar thiol-disulfide oxidoreductases catalyzing thiol-disulfide exchange reactions via reversible oxidation of two active-site cysteine residues separated by two amino acids (CX1X2C). Standard state redox potential (E degrees ') values for glutaredoxins are presently unknown, and use of glutathione/glutathione disulfide (GSH/GSSG) redox buffers for determining E degrees ' resulted in variable levels of GSH-mixed disulfides. To overcome this complication, we have used reverse-phase high performance liquid chromatography to separate and quantify the oxidized and reduced forms present in the thiol-disulfide exchange reaction at equilibrium after mixing one oxidized and one reduced protein. This allowed for direct and quantitative pair-wise comparisons of the reducing capacities of the proteins and mutant forms. Equilibrium constants from pair-wise reaction with thioredoxin or its P34H mutant, which have accurately determined E degrees ' values from their redox equilibrium with NADPH catalyzed by thioredoxin reductase, allowed for transformation into standard state values. Using this new procedure, the standard state redox potentials for the Escherichia coli glutaredoxins 1 and 3, which contain identical active site sequences CPYC, were found to be E degrees ' = -233 and -198 mV, respectively. These values were confirmed independently by using the thermodynamic linkage between the stability of the disulfide bond and the stability of the protein to denaturation. Comparison of calculated E degrees ' values from a number of proteins ranging from -270 mV for E. coli Trx to -124 mV for DsbA obtained using this method with those determined using glutathione redox buffers provides independent confirmation of the standard state redox potential of glutathione as -240 mV. Determining redox potentials through direct protein-protein equilibria is of general interest as it overcomes errors in determining redox potentials calculated from large equilibrium constants with the strongly reducing NADPH or by accumulating mixed disulfides with GSH.

  • 2360. Åslund, F
    et al.
    Nordstrand, K
    Berndt, Kurt D
    Karolinska Institutet.
    Nikkola, M
    Bergman, T
    Ponstingl, H
    Jornvall, H
    Otting, G
    Holmgren, A
    Glutaredoxin-3 from Escherichia coli: Amino acid sequence, H-1 and N-15 NMR assignments, and structural analysis1996In: Journal of Biological Chemistry, ISSN 0021-9258, E-ISSN 1083-351X, Vol. 271, no 12, p. 6736-6745Article in journal (Refereed)
    Abstract [en]

    The primary and secondary structure of glutaredoxin-3 (Grx3), a glutathione-disulfide oxidoreductase from Escherichia coli, has been determined. The amino acid sequence of Grx3 consists of 82 residues and contains a redox-active motif, Cys-Pro-Tyr-Cys, typical of the glutaredoxin family. Sequence comparison reveals a homology (33% identity) to that of glutaredoxin-1 (Grx1) from E. coli as well as to other members of the thioredoxin superfamily. in addition to the active site cysteine residues, Grx3 contains one additional cysteine (Cys(65)) corresponding to one of the two non-active site (or structural) cysteine residues present in mammalian glutaredoxins. The sequence-specific H-1 and N-15 nuclear magnetic resonance assignments of reduced Grx3 have been obtained. From a combined analysis of chemical shifts, (3)J(HN alpha) coupling constants, sequential and medium range NOEs, and amide proton exchange rates, the secondary structure of reduced Grx3 was determined and found to be very similar to that inferred from amino acid sequence comparison to homologous proteins. The consequences of the proposed structural similarity to Grx1 are that Grx3, while possessing a largely intact GSH binding cleft, would have a very different spatial distribution of charged residues, most notably surrounding the active site cysteine residues and occurring in the proposed hydrophobic protein-protein interaction area. These differences may contribute to the observed very low K-cat of Grx3 as a reductant of insulin disulfides or as a hydrogen donor for ribonucleotide reductase. Thus, despite an identical active site disulfide motif and a similar secondary structure and tertiary fold, Grx3 and Grxl display large functional differences in in vitro protein disulfide oxide-reduction reactions.

  • 2361.
    Öberg, Martina
    Södertörn University College, School of Life Sciences.
    Dricksvatten som handelsvara med Sverige som exportör?2006Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    The drinking water in the global world today are not equally divided over continents or

    smaller geographical units. It depends both on the waters natural cycle and other factors, such

    as human reach and technical range. The human reach is symbolised by laws, ownership,

    attitudes, and economics in this assignment and the technical range is a factor that drives

    development forward in purifying and transport of drinking water. This paper also discuss

    sustainable development as a concept and how it can be related to drinking water. The paper

    also discuss other ways to view water as both a vital resource and a merchandise.

    The purpose of this paper is to survey Sweden’s possibility to export drinking water to other

    countries on the basis of these questions:

    1. Is it possible to own water?

    2. What does sustainability mean in a relation to drinking water and is an export of

    drinking water a sustainable solution to drinking water problems?

    3. Which are the possibilities to export water from Sweden to other countries and where

    should the withdrawal take place?

    To get an answer to this question, the freshwater supply in Sweden is described in this paper,

    and also the rules that affect it, such as laws, ownership and withdrawal. To create an image

    of Sweden’s supply of drinking water the investigation includes both secondary and primary

    data. The primary data are built upon interviews with seven persons which in different ways

    are working with drinking water questions. The interviews includes questions about

    ownership and water, price and water, laws and technique regarding water and also more

    direct questions about the possibilities for Sweden to export drinking water to other countries

    and the positive and negative aspects that comes up with this kind of export.

    The data that is secondary is based on reports from Naturvårdsverket and Sweden’s

    Geological investigation (SGU) in Sweden. These reports describes Swedens supply of

    surface water and groundwater.

    The result of this paper is that you can’t own water, but one can use it in different ways whit

    some limitations. Sustainability is an uncertain concept in a relation to drinking water,

    because economics, environment and social aspects are not always compatible in the

    sustainable thought. Drinking water and the problems around it therefore includes a big

    measure of insecurity. The majority of the interviewed therefore saw an export of drinking

    water as an untenable, short-term solution of drinking water problems. If Sweden can export

    water or not is still unclear, because the persons interviewed has different answers to this

    question. Besides, ownership of a resource is a basic condition for one to export and sale it

    and no one owns the water in Sweden, according to the persons that was interviewed.

    Sweden’s strength is, according to the persons interviewed, the state’s big surplus of water,

    and the weakness depends on the big distance between Sweden and the water market.

    If Sweden should decide to export drinking water the best alternative of withdrawal would be

    in the north part of the country. This because the surplus is big there and in the future

    pollution on water expects be low in this area, according to Naurvårdsverket and Sweden’s

    geological institution.

    Download full text (pdf)
    FULLTEXT01
  • 2362.
    Öhlund, Erika
    et al.
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science. Södertörn University, Centre for Baltic and East European Studies (CBEES), Baltic & East European Graduate School (BEEGS).
    Hammer, Monica
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    Björklund, J.
    Örebro University.
    Managing conflicting goals in pig farming: farmers’ strategies and perspectives on sustainable pig farming in Sweden2017In: International Journal of Agricultural Sustainability, ISSN 1473-5903, E-ISSN 1747-762X, Vol. 5, no 6, p. 693-707Article in journal (Refereed)
    Abstract [en]

    Industrial meat production has several negative environmental effects. Governments’ agricultural policies aim for cost efficiency combined with high environmental and animal welfare, which puts farmers in a difficult situation trying to navigate between sometimes contradictory requirements. This paper studies how Swedish pig farmers resolve or cope with conflicting goals in pig farming. We have analysed the regulations governing EU and Swedish pig farming. We have also interviewed five Swedish pig farmers about their views of the different goals of pig farming and strategies for resolving conflicts between the goals of low environmental impact, high animal welfare and enough profitability to continue farming. The greatest divide was between the conventional farmers, who emphasized natural resource efficiency, and the organic farmers who stressed animal welfare, multifunctionality and ecosystem service delivery. We suggest four strategies to contribute to resolving some of the conflicting goals: improve communication about different types of pig farming; use public procurement as a driver towards more sustainable pork production; work towards improving the Common Agricultural Policy, perhaps by implementing payments for ecosystem services or multifunctionality; and finally, decrease the total production of pork to lower the emissions per land unit.

  • 2363.
    Öhlund, Erika
    et al.
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science. Södertörn University, Centre for Baltic and East European Studies (CBEES), Baltic & East European Graduate School (BEEGS).
    Zurek, Karolina
    Stockholm University / Swedish Institute for European Policy Studies.
    Hammer, Monica
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.
    Towards Sustainable Agriculture?: The EU framework and local adaptation in Sweden and Poland2015In: Environmental Policy and Governance, ISSN 1756-932X, E-ISSN 1756-9338, Vol. 25, no 4, p. 270-287Article in journal (Refereed)
    Abstract [en]

    Agricultural systems can be seen as nested social-ecological systems. European Union (EU) Member States vary considerably in terms of their agricultural, socio-economic and environmental circumstances. Yet, as participants in the common agricultural market, they are subject to a uniform Common Agricultural Policy (CAP). An important question is whether there is enough room for flexibility to sustain diverse agricultural systems and facilitate national targeting of sustainability-promoting measures. This article analyses the institutional arrangements concerning cross-scale interactions and interdependencies at national and regional (EU) levels, focusing on how Poland and Sweden implement CAP funds in relation to sustainable agriculture, in particular the agri-environmental schemes, for the period 2007-2013. What room is there in practice for accommodating national differences and sustainability priorities offered by the EU agricultural policy, and how are the existing opportunities used by the two countries? It is shown that agri-environmental funds are too small to prevent transition towards large-scale farming in new Member States and CAP does not effectively promote transformation towards sustainable practices in the EU.

  • 2364.
    Österlund, Ida
    Södertörn University College, School of Life Sciences.
    Samhällsnyttan av vattenverksamheter: Hur tillämpas samhällsnyttokravet i 11 kap. 6 § miljöbalken vid tillståndsprövning av vattenverksamheter?2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The subject matter of this Bachelor’s thesis is the special permit condition applying to water operations in accordance with chapter 11 section 6 of the Swedish Environmental Code. The article states that water operations may only be undertaken if the benefits, from the point of view of public and private interests, are greater than the costs and damages associated with them. The purpose of the regulation is to prevent water operations that are not socially efficient and to provide an additional protection for the environment, in excess of the general rules of consideration in the Code.

    The purpose of this study is to look into how this particular article is applied in practice. This is done by analysing the legal usage as practiced by the court as well as by the applicants. The general rule is that the applicant has to show that the operation, for which the permit is being sought, is in compliance with the obligations associated with the activity. The study shows that it is very difficult to find guidance from case law on how an assessment of the social efficiency is to be carried out. Court practice indicates that circumstances such as whether the operation is in compliance with certain environmental objectives can be used to weight different aspects in the social efficiency assessment. However, the assessments carried out by the applicants are in general focused on the economic benefits for the applicant. This practice might entail a risk for environmental values not being properly valued when weighted against more tangible monetary benefits. A broader perspective is therefore called for. Potential improvements on the practice of the article are discussed against different valuation methods.

    Download full text (pdf)
    FULLTEXT03
  • 2365.
    Östlund, Simon
    Södertörn University, School of Natural Sciences, Technology and Environmental Studies.
    Många bäckar små, blir det bättre då?: En studie om den småskaliga vattenkraftens för- och nackdelar ur ett miljöperspektiv2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Today we face many environmental problems such as climate change and biodiversity loss. Hydropower is a renewable energy source that can produce electricity with low greenhouse gas emissions. Sweden has a long tradition of using water as an energy source and has during the past century built hydropower in a majority of the Swedish rivers. Today, hydropower accounts for nearly half of Sweden's electricity production and contributes to Sweden's low greenhouse gas emissions. But hydropower also affects biodiversity and water bodies negatively. Of the approximately 2100 hydropower plants in Sweden, 200 accounts for over 90% of the electricity production. Thus there are a large number of small-scale hydropower plants that contribute to a small portion of the electricity while they are liable to affect streams negative. The purpose of this study was to investigate whether electricity from small-scale hydropower is justifiable in terms of its environmental impact. The study used a qualitative method based on semi-structured interviews with the following stakeholders: Swedenergy, Swedish Hydropower Association, Swedish Energy Agency, Swedish Agency for Marine and Water Management, Swedish Society for Nature Conservation, Swedish Anglers’ Association and River Savers Association Sweden.

    The results showed that small-scale hydropower is a cheap and established energy source, it can also contribute with cultural values, it is locally produced and consumed that can give greater stability to the electricity grid and reduce distribution losses. The disadvantages show that small-scale hydropower lacks some of the key features that large-scale hydropower can provide: the regulation of the electricity grid and the ability to store water that can be used if necessary. Furthermore, small-scale hydropower is considered to have a major negative impact on streams and biodiversity. The potential for small-scale hydropower could also be considered lower than for other renewable energy while developing more slowly. Legislation, permits and electricity certificate system has also been identified as factors that do not help the environmental situation in streams.

    The need to produce renewable electricity from small-scale hydropower can be considered lower than the need to protect streams and biodiversity to reach Swedish environmental quality objectives and the Water Framework Directive. There is scope for reducing electricity production from small-scale hydropower and still achieve environmental policy objectives on renewable energy and streams and biodiversity. The conclusion is that electricity production from small-scale hydropower cannot be justified in terms of its environmental impact and that there is a need to examine the possibility of removing the smallest hydropower plants with the greatest environmental impact. It is also stressed that there is a lack of proper incentives to promote biodiversity and aquatic environments and that the view of small-scale hydropower as environmentally friendly should be questioned.

    Download full text (pdf)
    Många bäckar små, blir det bättre då?
  • 2366.
    Özkeskin, Narin
    et al.
    Södertörn University, School of Communication, Media and it.
    Duran, Jiyan
    Södertörn University, School of Communication, Media and it.
    Sociala nätverkssajter: En studie om vad som utmärker relationer på Facebook, Google+ och LinkedIn.2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    More and more people today manage their social relationships through social networking sites. A social networking site is a virtual place where people can meet and interact with each other. On such sites, one can use the various features and attributes to present ourselves to the friends we have online. The central question of this report is what characteristics of relationships show on social networking sites. With the features and attributes that are represented and whether the architect for a social networking site affects the relationship between friends. To investigate the issue we have interviewed users of three different social networking sites: Facebook, Google + and LinkedIn. In addition we have also done an inventory analysis of these sites. Our study shows that there are both similarities and differences between these three sites in terms of architecture in which attributes and functions are included. The key areas in which a friend can present themselves on Facebook, Google + and LinkedIn are: home, profile, status updates, messaging, profile picture, friends, adding friends and friend requests. The attribute that most characterise a friend and a user according to our results are profile photo, mutual friends, status updates, recommendations, information page and photo updates. The interviews showed that tagging, categorization of friends, photos, friends and status updates are the attributes that can affect a relationship between friends in that it affects the user's opinion of the friend, in both a positive and a negative direction.

    Download full text (pdf)
    fulltext
45464748 2351 - 2366 of 2366
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • harvard-anglia-ruskin-university
  • apa-old-doi-prefix.csl
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf