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  • 51.
    Norell, Lina
    et al.
    Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för bygg- energi- och miljöteknik.
    Sundqvist, Josefine
    Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för bygg- energi- och miljöteknik, Miljöteknik.
    Granulat på konstgräsplaner i Gävle kommun: Miljöpåverkan vid spridning via dagvattensystem2018Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Konstgräsplaner kan beaktas som en betydande utsläppskälla av mikroplaster. Fyllnadsmaterialet som används på konstgräsplaner kallas granulat och går under definitionen mikroplast. De som används främst på den svenska marknaden är SBR, TPE, EPDM och R-EPDM. Granulatet sprids främst via dagvattnet från konstgräsplaner som då riskerar att hamna i närliggande vattendrag. Tidigare studier har påvisat att granulatet kan urlaka toxiska ämnen som riskerar att förorena vattendragen. Vattenlevande organismer kan misstolka små partiklar som föda, vilket kan ge konsekvenser som bland annat förstoppning och svält. Ämnena som kan urlaka tillhör samlingsnamnet miljögifter och är stabila, toxiska, reproduktionsstörande och ackumulerande.

    Syftet med denna studie är att ge en beskrivning av vilka fyllnadsmaterial som används på konstgräsplaner i Gävle och undersöka hur dessa partiklar kan spridas samt identifiera åtgärdsförslag för att minska spridningen. Syftet är också att redovisa konstgräsplanernas dagvattenutlopp och vattendragens status för att redogöra för den potentiella miljöpåverkan som granulatet kan ge upphov till. Metoderna som använts i arbetet är litteraturstudie, personlig kommunikation, fältobservationer, kartsystem och figurer samt vattenprov.

     

    Gavlefastigheter äger fem konstgräsplaner i Gävle kommun, vilka är Träffen IP, Gavlevallen, Nynäs IP, Sörby IP och Andersberg. På dessa planer används SBR- TPE- och R-EPDM-granulat. På planområdet förekommer dagvattenbrunnar och granulatet kan spridas till dessa genom ytavrinning vid höga regnflöden, snöplogning och smältvatten samt att spelarna får med sig partiklarna från planen. De flesta planer har dräneringssystem kopplat till dagvattenledningar som kan sprida urlakande ämnen till vattendrag. Dagvattenledningarna har utlopp i Testeboån, Bäckebrobäcken, Gavleån och Hemlingbybäcken. Granulatets fysikaliska egenskaper är en betydande roll om partikeln sedimenterar till botten eller om den kan transporteras med vattendraget. De konstgräsplaner som främst är i behov av åtgärder för att minska spridningen av granulat är Sörby, Anderberg och Nynäs.

     

    Vattendragens statusklassning uppnår ej god kemisk status och ämnen som förekommer i förhöjda halter varierar beroende på vattendrag. Enligt tidigare studier kan flera av dessa ämnen urlaka från granulatet, vilket innebär att det finns en risk för ett tillskott av dessa ämnen om spridning sker.

  • 52.
    Olsson, Simon
    et al.
    Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för Industriell utveckling, IT och Samhällsbyggnad.
    Pettersson, Jacob
    Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för Industriell utveckling, IT och Samhällsbyggnad.
    Case Pöyry Sweden AB: Miljöprestandaindikatorer för ett tjänsteföretag2013Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    The world's natural resources are constantly being reduced, which increases the pressure on companies to actively engage themselves in environmental activities. Meanwhile, stakeholders focus is being broadened and it is now important not only to supply a particular product or service but also show that they are actively pursuing an environmental agenda. Companies can use various tools to aid in environmental efforts, but also to demonstrate to the world that the company is actively engaged in environmental activities. One such tool is the environmental standard ISO14001 which provides the company with guidance and support on how the business must manage its environmental efforts. To show a business' progress in environmental performance, it is advantageous to use environmental performance indicators as they enable stakeholders to easily understand how the business works with environmental issues.

    Authors in the field explain that the environmental management system propagation is limited in service organizations. It is known that also a service organization contributes to environmental impact in some way. Therefore, it is interesting to examine a service organization's direct environmental impact and to create environmental performance indicators to the organization.

    This case study has been carried out on a case-company that has the intention to implement an environmental management system. The case-company needs help to identify its environmental aspects, formulate environmental performance indicators and environmental goals and therefore the study's purpose is: to identify a service organizations environmental impact and to develop environmental indicators. This is going to be applied to a technology consulting company. And also identify and set the environmental goals to use in the environmental management system.  To identify the case-company’s environmental impact interviews have been conducted.

    Study results show that transports are judged to be the case- company's most significant environmental aspect. The conclusion from this study is that it is difficult to prove that a given model, a certain environmental impact or a certain aspect excels at technical consulting.

  • 53.
    Peng, Tao
    et al.
    Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för Industriell utveckling, IT och Samhällsbyggnad.
    Wang, Xiaowen
    Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för Industriell utveckling, IT och Samhällsbyggnad.
    A Mobile-based Navigation Web Application: Finding the Shortest-time Path based on Factor Analysis2012Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    With the economic growth, the number of motor vehicles has increased rapidly for the last decades, especially in developing countries like China and India. Availability of more vehicles makes it more convenient for people to travel and merchandise transport. The increase of the number of vehicles also brings stresses to public traffic and pollution to the environment. When the number of vehicles on the road is over the available space, it results in traffic congestion. The problem is being studied and there are several solutions to it, like building more roads, rebuilding the existing streets and enlarging the cities. Based on the traffic reason and the environment reason, the government and the institute of environmental protection appeal to the public to take public transport means instead of private cars. But the measure affects the utilization ofmotor vehicles.

    Global Positioning System (GPS) provides autonomous geo-spatial positioningand navigation service. Once the user enters the destination, the navigation service will show the shortest path from the location of the user to the destination. Following the guide makes the vehicles running purposively, and it is also favorable for traffic control and management.

    Theoretically, if the diver keeps the same driving mode, the shortest path will cost the shortest time, but in reality, the traffic environment is complex and the driving speed is variable thus the shortest path is probably not the fastest path. In this study, the hinder factors of the speed and traffic are fixed constructions on the road, like: turnings, hospitals, schools, residential areas, traffic lights and the user-controlled factor (sites of traffic jams, accidents, and temporary construction on the road). We take the hinderfactors of traffic and driving speed into consideration while providing the route plan, finding the shortest-time path, and showing the result as an online map via the web Geographic Information System (GIS) application. We show that reducing the travelling time of motor vehicles, makes the traffic flow more rapid and efficient. Alsoreducing the emission time of motor vehicles, diminishes the greenhouse effect.

    Beside these, the achievement of our study also shows that the public can take advantage of open source tools and data to build their GIS application to do spatial and data analysis.

  • 54.
    Rosales, Oscar
    Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för bygg- energi- och miljöteknik, Miljöteknik.
    Characterization of microbial growth in lignin-based residues and biodegradation of vanillin:: Optimizing factors for maximizing the extraction of a biodegradation compound of vanillin and investigating the potential for lipid accumulation.2017Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [en]

    Vanillin (4-hydroxy-3methoxybenzaldehyde) is one of the most employed aromatic and flavoring additives in food and cosmetic industry. The industrial interest in vanillin could also apply to its biodegradation products. The microbial transformation of vanillin can open the possibility of new products with new areas of application for products related to vanillin. For example, vanillyl alcohol, vanillic acid and ferulic acid are currently used in the pharmaceutical or food industry. Some species reported to biodegrade vanillin into the related products vanillyl alcohol and vanillic acid, are: Brettanomyces anomalus and Saccharomyces cerevisiae. Moreover, certain microorganisms possess the ability to accumulate lipids when cultivated on different carbon sources, opening the possibility of microbial lipid production as another industrial application. The present investigation focuses on the optimization of extraction methods for vanillin biodegradation products, as well as identifying the isolates of a collection of microorganisms originating from the Faroe Islands that are amenable to being cultivated on a lignin-based media. Finally, the potential for microbial lipid accumulation was also studied. Two analytical methods, Thin-Layer Chromatography (TLC) and Gas Chromatography (GC) were employed for characterizing the biodegradation products obtained after 24 hours and 72 hours of culture in growth medium supplemented with 1 mM of vanillin. The results showed that after 24 hours of incubation, the model microorganism, strain FMYD002, had consumed some of the vanillin and transformed it into biodegradation products. TLC retention factors and GC chromatograms revealed that the main biodegradation product after 24 hours - when compared to a standard – is likely to be to vanillyl alcohol. Furthermore, vanillin and its biodegradation products were relatively temperature-stable based on a temperature test of supernatant from a 24-hour culture, however, when the 72-hour culture had been subjected to the highest temperature (60 °C) some spontaneous decomposition occurred. The biodegradation pattern of the 72-hour culture evidenced by TLC revealed two additional biodegradation products, one of which migrates in a similar fashion to vanillic acid. After 72 hours of incubation, the biodegradation product presumed to be vanillyl alcohol was no longer observed. Acidification tests showed that the best route for extraction of the product believed to be vanillyl alcohol is to adjust the extracted sample to a pH of 9. The cultivation test of the isolates in media prepared from different lignin-based residual products showed that 26 out of 60 initial strains grew regardless of the concentration of lignosulfonates and vanillin. Moreover, 17 strains grew in nitrogen-limited medium. Eight of the strains accumulated lipids. A preliminary categorization of isolates based on their colony morphology and capacity of growth on different substrates showed that to some extent, their morphology can predict the ability to grow on lignin- and vanillin-based media. This could help future scientists to easily screen for and select isolates with interesting activity for the ligno-cellulose industry.

  • 55.
    Samuelsson, Karl
    et al.
    Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för bygg- energi- och miljöteknik, Miljöteknik.
    Giusti, Matteo
    Stockholm Resilience Centre, Stockholm University, Sweden.
    Peterson, Garry D.
    Stockholm Resilience Centre, Stockholm University, Sweden.
    Legeby, Ann
    School of Architecture, KTH Royal Institute of Technology, Sweden.
    Brandt, S. Anders
    Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för Industriell utveckling, IT och Samhällsbyggnad, Samhällsbyggnad, GIS.
    Barthel, Stephan
    Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för bygg- energi- och miljöteknik, Miljöteknik. Stockholm Resilience Centre, Stockholm University, Sweden.
    Impact of environment on people’s everyday experiences in Stockholm2018Inngår i: Landscape and Urban Planning, ISSN 0169-2046, E-ISSN 1872-6062, Vol. 171, s. 7-17Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In order to construct urban environments that limit negative impacts for global sustainability while supporting human wellbeing, there is a need to better understand how features of the environment influence people’s everyday experiences. We present a novel method for studying this combining accessibility analysis and public participatory GIS (PPGIS). Seven environment features are defined and accessibility to them analysed across Stockholm municipality. We estimate the probabilities of positive and negative experiences in places based on these environment features, by using spatial regression to extrapolate from the results of an online PPGIS survey (1784 experiences of 1032 respondents). Six of the seven studied environment features have significant impact on experiential outcome, after accounting for spatial autocorrelation among the data. The results show that number of residents and proximity of nature environments and water, all common quality indicators in urban planning and research, have weak statistically significant effects on people’s experiences. However, areas dominated by large working populations or proximity to major roads have very low rates of positive experiences, while areas with high natural temperature regulating capacities have very high rates, showing that there are considerable qualitative differences within urban environments as well as nature environments. Current urban planning practices need to acknowledge these differences to limit impacts on the biosphere while promoting human wellbeing. We suggest that a good way to start addressing this is through transformation of negatively experienced urban areas through designs that integrate closeness to urbanity with possibilities to have nature experiences on a daily basis. 

  • 56.
    Schewenius, Maria
    et al.
    Stockholm Resilience Centre.
    Colding, Johan
    Stockholm Resilience Centre; The Beijer Institute, Royal Swedish Academy of Sciences.
    Barthel, Stephan
    Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för bygg- energi- och miljöteknik, Miljöteknik. Stockholm Resilience Centre.
    Social-Ecological Integrated Planning and Design2017Inngår i: Dreams and Seeds: The role of campuses in sustainable urban development / [ed] Schewenius, M., Keränen, P., al Rawaf, R., Stockholm: Stockholm Resilience Centre; Metropolia University of Applied Sciences , 2017, 1, s. 47-49Kapittel i bok, del av antologi (Annet vitenskapelig)
  • 57.
    Twumasi, Ebenezer
    et al.
    Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för bygg- energi- och miljöteknik, Byggvetenskap - byggnadsmateriallära.
    Norberg, Peter
    Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för bygg- energi- och miljöteknik, Byggvetenskap - byggnadsmateriallära.
    Sjöström, Christer
    Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för bygg- energi- och miljöteknik, Byggvetenskap - byggnadsmateriallära.
    Tailored Precipitated Silica Adsorbents for the Built Environment2011Inngår i: XII DBMC: 12th International Conference on Durability of Building Materials and Components (Vol. 4): Michael A. Lacasse, Vasco Peixoto de Freitas, Helena Corvacho, Porto: FEUP Edições , 2011, , s. 8Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The paper provides a review of the synthesis and adsorptive properties of a novel class of precipitated silica materials. To enhance or tailor the adsorption efficiency, various trapping chemicals (potassium hydroxide, potassium permanganate) or co-adsorbents (coconut activated carbon) are incorporated in the structure of the substrate material. Further, it discusses the applicability and performance over time of the material as adsorbents for removal of hydrogen sulphide, sulphur dioxide and toluene contaminants which are potentially hazardous to sensitive equipment and more importantly, human health. Chemical substances in the air are an unavoidable by-product of most human endeavours within industry and transportation. The need for adsorbents to combat Airborne Molecular Contamination (AMC) follows from the continued intensification of the global environmental movement as well as the rapid industrialisation of developing countries. The removal performance of modified precipitated silica adsorbent shows that the new adsorbent can be tailored to remove low concentrations of sulphur dioxide, hydrogen sulphide and toluene contaminants at indoor environment conditions. The results further shows that the new precipitated silica adsorbent impregnated with 8 wt% KOH shows better performance than commercial alumina impregnated with 8 wt% KMnO4.The adsorbent material may find interesting and efficient uses as passive sinks for pollutants incorporated into more traditional building products such as acoustic baffles or as ingredients in various coatings. The filter material is environmentally friendly and consists of benign chemicals that are abundant worldwide. Performance over time aspects, re-use and recycling of exhausted filter materials are key issues addressed.

  • 58.
    Yang, Frank
    et al.
    Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för bygg- energi- och miljöteknik, Miljöteknik.
    Goldman, Mattias
    Forum for reforms, entrepreneurship and sustainability (Fores), Stockholm, Sweden.
    Lagercrantz, Jakob
    The 2030 secretariat, Stockholm, Sweden.
    Sustainable Mobility the Chinese Way: Opportunities for European cooperation and inspiration2018 (oppl. 1)Bok (Fagfellevurdert)
    Abstract [en]

    The book introduces China's endeavours in sustainable mobility to combat climate change and ease air pollution, including electric vehicles, high-speed rail, shared bikes and cars, etc. Suggestions are given on how Europe and China can learn from each other for a more sustainable world.

  • 59.
    Åsén Ekstrand, Eva
    et al.
    Högskolan i Gävle, Akademin för utbildning och ekonomi, Avdelningen för humaniora, Media- och kommunikationsvetenskap.
    Findahl, OlleHögskolan i Gävle, Akademin för utbildning och ekonomi, Avdelningen för humaniora, Media- och kommunikationsvetenskap.
    Consuming the Environment 2017: Multidisciplinary approaches to urbanization and vulnerability2018Konferanseproceedings (Annet vitenskapelig)
12 51 - 59 of 59
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