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  • Aid, Graham, 1980-, et al. (författare)
  • Action Research In Waste Management
  • 2010
  • Ingår i: Linnaeus ECO-TECH ´10. - Linnaeus University. ; s. 1009-1019
  • Konferensbidrag (refereegranskat)abstract
    • The action research methodology and several of its methods have previously been highlighted and described by the authors as a fitting and rigorous framework approach for complex waste management systems.  This was in response to criticism of the ex ante selection of traditional empiric systems analysis tools to provide decision support and ‘sustainable improvement’ in such complex systems which often involve strong human and political factors.   Several of the action research methods described have recently been utilized in a case study around mineral (aggregate) construction and demolition waste in the Stockholm region.  These methods were integrated through a series of workshops and work areas undergone together with project members from several private and public sectors.  Leaving the problem fuzzy (loosely defined) in the beginning; utilizing convergent interviewing, rich pictures and focus groups allowed the researchers and partner stakeholders to identify not one but several problem areas within the system of focus.  Indicator creation and a dialectic processes were then used to identify qualitative and quantitative aspects of salience around these problem areas.  These resulting indicators were strengthened through a process of verification.  Each indicator was then analyzed by what was deemed to be appropriate and transparent means.  It is argued that this approach may create better communication, transparency, and understanding by the stakeholders.  These factors in turn allowing stronger stakeholder ownership of the process and assisting in more informed decisions and help to provide stability for desired change. However the process was not without its drawbacks such as intense communication and time requirements.
  • Allan, Ian J., et al. (författare)
  • Mobile passive samplers: : Concept for a novel mode of exposure
  • 2011
  • Ingår i: envrionmental pollution. - 0269-7491. ; 159:10, s. 2393-2397
  • Tidskriftsartikel (refereegranskat)abstract
    • Integrative passive sampling with devices such as semipermeable membrane devices generally relies on rigs for month-long static exposures in water. We evaluate here whether mobile exposures of passive samplers can provide reliable estimates of dissolved contaminant concentrations. Mobile exposures were obtained by towing samplers fastened to the end of a benthic trawl net. Significant and reproducible absorption of polycyclic aromatic hydrocarbons during 5 h-long deployments was made possible by high sampling rates resulting from high water turbulences during towing at 1.2–1.5 knots. Sampling rates (72–215 L d−1) estimated from the dissipation of performance reference compounds were supported by in situcalibration with samplers exposed for a 30 days in the vicinity of the test site. Higher fluoranthene and pyrene absorption in samplers exposed to the trawling-induced sediment plume could be attributed to desorption from re-suspended sediments. This mode of exposure has the potential to be used in monitoring programmes.
  • Andersson, Ing-Marie, et al. (författare)
  • A study visit to a vitual company
  • 2012
  • Ingår i: NGL 2012  Next Generation Learning Conference : Conference proceedings. - Falun : Högskolan Dalarna. - 978-91-85941-47-6 ; s. 69-74
  • Konferensbidrag (övrigt vetenskapligt)abstract
    • To integrate study visits to different workplaces in higher education implies important benefits for the course quality. The study visit gives the students a better understanding for the real situations they will meet in working life. However for practical and economical reasons is that not always possible. The purpose of this project is to create a virtual company that shall replace the real one for study visits. The goal is to create a realistic picture and that intended use of it can come as close as possible to a real study visit. It is also important to facilitate linking theory and practice. The virtual company is built up by pictures, videos and text. All material is made available on a web page and when entering the students will meet a layout of the company. From that position is it possible to walk around and look at videos from different workstations. Besides that can they also listen to interviews with managers and representatives of staff as well as reading reports concerning productivity and the work environment. The focus of the study visit is work sciences, therefore the material also include some visualized information about work hazards. On the web page there are also a number of tasks for the students to carry out. Until the autumn 2011, 132 students at Dalarna University have visited and produced reports from the virtual company. They were studying in programs for mechanical engineering, production technicians and human resource management. An evaluation among some ten students showed that the study visit to the virtual company is flexible in time and effective, but that students wish to have even more detailed information about the company. Experiences from four years of use in a number of classes show that the concept is worth further development. Furthermore with production of new material the concept is likely to be applicable for other purposes.
  • Arnkil, Harald, et al. (författare)
  • PERCIFAL: Visual analysis of space, light and colour
  • 2011
  • Ingår i: AIC 2011, Interaction of Colour & Light in the Arts and Sciences, Midterm Meeting of the International Colour Association, Zurich, Switzerland, 7–10 June 2011: Conference Proceedings, CD. - Zurich : pro/colore, 2011. ; s. 229-232
  • Konferensbidrag (refereegranskat)abstract
    • This paper addresses the need for better and more accurate methods of recording and analyzing the visual experience of architectural space. PERCIFAL (Perceptive Spatial Analysis of Colour and Light) is an ongoing project that aims at developing a method of analysis that can capture coherent spatial experiences of colour and light. The starting point for PERCIFAL is a method of visual evaluation of space and light, developed by Professor Anders Liljefors at the former department of architectural lighting at KTH Architecture. PERCIFAL is based on direct visual observations and the recording of these observations by verbal-semantic descriptions using a questionnaire. It has been developed primarily as an educational tool, but we see in it potential for a design tool for professionals as well as for an analytical method for research. The first test results, conducted in Sweden, Norway and Finland, show that the method has significant pedagogical merits and that it allows interesting comparisons between physical measurements and visual experiences of space, light and colour. 
  • Boman, Christoffer, 1970-, et al. (författare)
  • Effects of increased small-scale biomass pellet combustion on ambient air quality in residential areas : A parametric dispersion modeling study
  • 2003
  • Ingår i: Biomass and Bioenergy. - Elsevier. - 0961-9534. ; 24:6, s. 465-474
  • Tidskriftsartikel (refereegranskat)abstract
    • Sweden's goals of contemporaneously reducing CO2 emissions and phasing out nuclear power will require a maximum utilization of biomass fuels. This would imply a significant shift from electricity and fuel oil to biomass generated heat, but must also be accomplished without a deterioration of the local air quality. The most suitable energy carrier seems to be pelletized biomass fuels with their associated low emissions and considerable residential conversion potential. Using an underlying statistical design, a parametric dispersion modeling study was performed to estimate and illustrate the combined effects of source-specific, meteorological and modeling variables on the ambient air quality in a typical residential area for different conversion scenarios. The work nicely illustrated the benefits of combining statistical designs with model calculations. It further showed that the concentration of combustion related ambient THC was strongly related to conditions affecting the source strength, but only weakly to the dispersion conditions and model variables. Time of year (summer or winter); specific emission performance; extent of conversion from electricity; conversion from wood log combustion; and specific efficiency of the pellet appliances showed significant effects in descending order. The effects of local settings and model variables were relatively small, making the results more generally applicable. To accomplish the desired conversion to renewable energy in an ecologically and sustainable way, the emissions would have to be reduced to a maximum advisable limit of <img src="http://ars.els-cdn.com/content/image/1-s2.0-S0961953402001460-si7.gif" data-inlimgeid="1-s2.0-S0961953402001460-si7.gif" data-loaded="true" /> (given as CH4). Further, the results showed the potential positive influence by conversion from wood log to low emission pellet combustion.
  • Boman, Christoffer, et al. (författare)
  • Stove performance and emission characteristics in residential wood log and pellet combustion Part 2: Wood stove
  • 2011
  • Ingår i: Energy & Fuels. - American Chemical Society. - 0887-0624. ; 25:1
  • Tidskriftsartikel (övrigt vetenskapligt)abstract
    • The characteristics and quantities of a large number of gaseous and particulate emission components during combustion in a residential wood log stove with variations in fuel, appliance and operational conditions were determined experimentally. The measurement campaign included CO, NOx, organic gaseous carbon (OGC), volatile organic compounds (VOCs), polycyclic aromatic hydrocarbons (PAHs), total particulate matter (PMtot) as well as particle mass and number concentrations, size distributions and inorganic composition. CO varied in the range of 1100 to 7200 mg/MJfuel, while OGC varied from 210 to 3300 mg/MJfuel. Dominating VOCs were methane, followed by ethene, acetylene and benzene. Methane varied from 9 to 1600 mg/MJfuel. The non-methane volatile organic compound (NMVOC) emissions were in the range of 20-2300 mg/MJfuel. The PAHtot emissions varied from 0.8 to 220 mg/MJfuel, in most cases dominated by phenantrene, fluoranthene and pyrene. PMtot were in all cases dominated by fine particles and varied in the range 38-350 mg/MJfuel. The mass median particle diameters and the peak mobility diameters of the fine particles varied in the range 200-320 nm and 220-330 nm respectively and number concentrations in the range of 1-4×1013 particles/MJfuel. Air starved conditions, at high firing intensity, gave the highest emissions, especially for hydrocarbons. This type of conditions is seldom considered, though it may occur occasionally. The emissions from Swedish wood stoves, comparing a Swedish field study, are covered fairly well with the applied methodology, but other field studies reports considerably higher emissions especially for diluted particle sampling.
  • Brorsson, Sofia, et al. (författare)
  • Unilateral Strength Training With Maximal Velocity Improves Lower Body Power Outcome And Movement Velocity
  • 2012
  • Konferensbidrag (refereegranskat)abstract
    • In many sports development of power is considered to be one of the most important physiological qualities for success. Despite many studies in the area, research investigating unilateral power training methods for elite athletes is lacking.PurPose: The purpose of this study was to examine the effects of unilateral explosive strength training on lower body power output and movement velocity after six weeks of training.Methods: 17 elite male handball players (age 22±4), experienced in resistance training, participated in a six week intervention study. The players were divided into a training group (TR) n=11, and control group (CTL) n=6. The TR group performed 15 supervised training sessions during six weeks, involving ballistic weightlifting exercises performed unilateral with heavy loads (&gt;80% 1RM) and maximal intended movement velocity in both the concentric and eccentric phases of the lifts. The CTL group performed bilateral strength training with heavy loads without movement velocity consideration. Loaded vertical squat jumps with absolute loads of 20, 40, 60, 80 and 100 kg were made before and after the training period. A linear encoder attached to the barbell measured average concentric power (APc), average eccentric power (APe), peak velocity and time to peak velocity (tpV) to evaluate power output and movement velocity. To keep results brief but clear, average load was calculated as the mean change of all five loads from pre- to post intervention. T-tests were used to analyze differences between the two groups.Results: The unilateral power training improved APc (p&lt;0,05) on average with 3±1 W/kg (18%) in TR vs. -1±2 W/kg (-3%) in CTL. Similarly, for APe, average load increased significantly (p&lt;0,05) in TR 3±2 W/kg (36%) compared to -1±1 W/kg (-1%)in CTL. Moreover, TR decreased their tpV with -0,18±0,08 ms (-40%), compared to CTL 0,01±0,06 ms (2%: p&lt;0,05).Conclusion: The TR group showed improvements after only a short period of structured unilateral maximal velocity training which indicates that unilateral training principles could be effective for improving lower body power output in elite athletes involved in sports where unilateral movements predominate. Longer studies are needed to evaluate further potential benefits of unilateral strength training.
  • Buckland, Philip I., 1973- (författare)
  • The BugsCEP database -1000 sites and half a million fossils later.
  • 2014
  • Ingår i: Quaternary International. - Elsevier. - 1040-6182.
  • Tidskriftsartikel (refereegranskat)abstract
    • The Bugs database project started in the late 1980s as what would now be considered a relatively simple system, albeit advanced for its time, linking fossil beetle species lists to modern habitat and distribution information. Since then, Bugs has grown into a complex database of fossils records, habitat and distribution data, dating and climate reference data wrapped into an advanced software analysis package. At the time of writing, the database contains raw data and metadata for 1124 sites, and Russell Coope directly contributed to the analysis of over 154 (14%) of them, some 98790 identifications published in 231 publications. Such quantifications are infeasible without databases, and the analytical power of combining a database of modern and fossil insects with analysis tools is potentially immense for numerous areas of science ranging from conservation to Quaternary geology.BugsCEP, The Bugs Coleopteran Ecology Package, is the latest incarnation of the Bugs database project. Released in 2007, the database is continually added too and is available for free download from http://www.bugscep.com. The software tools include quantitative habitat reconstruction and visualisation, correlation matrices, MCR climate reconstruction, searching by habitat and retrieving, among other things, a list of taxa known from the selected habitat types. It also provides a system for entering, storing and managing palaeoentomological data as well as a number of expert system like reporting facilities.Work is underway to create an online version of BugsCEP, implemented through the Strategic Environmental Archaeology Database (SEAD) project (http://www.sead.se). The aim is to provide more direct access to the latest data, a community orientated updating system, and integration with other proxy data. Eventually, the tools available in the offline BugsCEP will be duplicated and Bugs will be entirely in the web.This paper summarises aspects of the current scope, capabilities and applications of the BugsCEP database and software, with special reference to and quantifications of the contributions of Russell Coope to the field of palaeoentomology as represented in the database. The paper also serves to illustrate the potential for the use of BugsCEP in biographical studies, and discusses some of the issues relating to the use of large scale sources of quantitative data.All datasets used in this article are available through the current version of BugsCEP available at http://www.bugscep.com.
  • Bylund Melin, Charlotte, et al. (författare)
  • Quantification, the link to relate climate-induced damage to indoor environments in historic buildings
  • 2013
  • Ingår i: Climate for collections: Standards and uncertainties : Postprints of the Munich Climate Conference 7 to 9 November 2012. - 978-3-00-042252-2 - 978-1-909492-00-4 ; s. 311-323
  • Konferensbidrag (refereegranskat)abstract
    • This paper describes and applies a method to quantify and related damage of painted wooden pulpits in 16 churches in Gotland, Sweden, to both the current and the historical indoor climate of the twentieth century. In addition, it demonstrates that the energy used to heat a church in the past can be measured and the study alsopoints towards a relationship between damage and heat output. The results suggest that more damage is present in churches with a higher heat output and there is increased damage in churches using background heating compared to churches that do not. However, the method needs to be improved and a larger population is required to validate these results.
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