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- Aid, Graham, 1980-, et al.
(författare)
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Action Research In Waste Management
- 2010
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Ingår i: Linnaeus ECO-TECH ´10. - Linnaeus University. ; s. 1009-1019
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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.
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| 2. |
- Andersson, Ing-Marie, et al.
(författare)
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A study visit to a vitual company
- 2012
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Ingår i: NGL 2012 Next Generation Learning Conference : Conference proceedings. - Falun : Högskolan Dalarna. - 978-91-85941-47-6 ; s. 69-74
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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.
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| 3. |
- Arnkil, Harald, et al.
(författare)
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PERCIFAL: Visual analysis of space, light and colour
- 2011
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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
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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.
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| 6. |
- Boman, Christoffer, et al.
(författare)
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Stove performance and emission characteristics in residential wood log and pellet combustion Part 2: Wood stove
- 2011
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Ingår i: Energy & Fuels. - American Chemical Society. - 0887-0624. ; 25:1
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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.
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| 7. |
- Brorsson, Sofia, et al.
(författare)
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Unilateral Strength Training With Maximal Velocity Improves Lower Body Power Outcome And Movement Velocity
- 2012
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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 (>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<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<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<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.
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| 9. |
- Cannon, Barbara, et al.
(författare)
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Yes, even human brown fat is on fire!
- 2012
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Ingår i: Journal of Clinical Investigation. - 0021-9738. ; 122:2, s. 486-489
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Tidskriftsartikel (refereegranskat)abstract
- That adult humans possess brown fat is now accepted - but is the brown fat metabolically active? Does human brown fat actually combust fat to release heat? In this issue of the JCI, Ouellet et al. demonstrate that metabolism in brown fat really is increased when adult humans are exposed to cold. This boosts the possibility that calorie combustion in brown fat may be of significance for our metabolism and, correspondingly, that the absence of brown fat may increase our proneness to obesity - provided that brown fat becomes activated not only by cold but also through food-related stimuli.
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| 10. |
- Dahlström, Christina, 1977-, et al.
(författare)
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Coating Microstructures : Binder Distributions
- 2012
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Ingår i: 12th TAPPI Advanced Coating Fundamentals Symposium Proceedings, Co-located with the 16th International Coating Science and Technology Symposium, ISCST 2012. - Tappi. - 978-159510220-1 ; s. 250-257
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Konferensbidrag (övrigt vetenskapligt)abstract
- Non-uniformities within the coating layer, such as porosity variations and binder distributions, are known to affect print uniformity and barrier properties. However, in the literature the results on coating microstructures are rather limited or sometimes conflicting.We obtained high quality images of coated paper cross sections using field emission scanning electron microscopy in combination with a new argon ion beam milling technique to directly observe and analyse the binder and pore distribution. This technique produces high quality images that allow microstructure characterisation of the coating layer.The binder distribution measurements showed that the binder is almost exclusively filling up the small pores, whereas the larger pores are mainly empty and depleted of binder.
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