| 1. |
- Bengtsson, Peter, et al.
(författare)
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Computer-Aided Planning of Production, Working and Residential Environments
- 1996
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Ingår i: International Journal of Industrial Ergonomics. - : Elsevier BV. - 0169-8141 .- 1872-8219. ; 17:1, s. 59-68
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Tidskriftsartikel (refereegranskat)abstract
- This paper discusses a computer-aided planning methodology and its applicability for planning of industrial production and working environments as well as for planning of residential and working environments for the differently abled. The methodology has been developed and evaluated in six case studies in mechanical industries and in six case studies related to adaptations for the differently abled. The results from the case studies indicate that computer-supported modelling and visualisation may serve as a common and efficient language facilitating communication about multifaceted environmental planning issues. The methodology is a cost-effective way of demonstrating layout ideas and testing dynamic activities like manufacturing and transportation. Corporate groups comprising people involved in, or affected by, development work seem to be a fruitful approach for cooperation, one which enhances learning and creativity. Such groups may be a proper forum for the dissemination of information, exchange of opinions, utilisation of both expert and lay experiences, and for public testing of current reality or future plans in such a way that mutual understanding between different professional categories is increased, hence promoting internal commitment.
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| 2. |
- Johansson, Jonas, et al.
(författare)
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Fluorescence imaging of light absorption for axial-beam geometry in capillary electrophoresis
- 1998
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Ingår i: Electrophoresis. - : Wiley. - 0173-0835 .- 1522-2683. ; 19:12, s. 2233-2238
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Tidskriftsartikel (refereegranskat)abstract
- A new method for investigation of axial-beam absorption detection for improved detection limits in microcolumn separations is reported. The method is based on fluorescence imaging of light absorption along a separation capillary. The probing UV light is introduced at one end of the capillary and shows an exponential fall-off along the capillary. As the UV light propagates through the sample peaks, an additional loss in intensity will be observed. In order to view the absorption profile along the capillary, a background fluorophore is added to the buffer. A charge-coupled device (CCD) detector and imaging optics are placed beside the capillary to view the capillary in a direction perpendicular to the capillary. Signal integration is employed for consecutive exposures as well as for neighboring detector pixels in order to increase the signal-to-noise ratio. Measurements for stilbene 3 with sulforhodamine B as a background fluorophore are presented. The characteristics of the detection method and potential improvements are discussed.
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| 3. |
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| 4. |
- Johansson, T, et al.
(författare)
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Real-time imaging through optical fiber array-assisted laser-induced fluorescence of capillary electrophoretic enantiomer separations
- 1999
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Ingår i: Analytical Chemistry. - : American Chemical Society (ACS). - 1520-6882 .- 0003-2700. ; 71:19, s. 4190-4197
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Tidskriftsartikel (refereegranskat)abstract
- An advanced detection system based on laser-induced fluorescence imaging for capillary electrophoresis (CE) is presented. An optical fiber array was constructed for collection and transportation of the emitted fluorescent light to the charge-coupled device (CCD) camera. The fiber array makes the setup compact compared with a setup where the capillary is imaged through a camera objective. The imaging detector captures the sample zones in motion during the migration through the capillary. This allows unique studies on dynamic events otherwise unrevealed. During the study, unexplained nonlinear migration behavior was revealed. Enantiomer separations of dansylated amino acids using cyclodextrins, imaged between 1.5 and 12 cm of a 28-cm-long 50-mu m i.d. capillary, were used for evaluation of the system. Comparing the optical fiber array with a camera lens system, the signal-to-noise-ratio (S/N) was 10 times higher. This is due to a combination of both higher signal and lower noise levels. To improve the S/N ratio further, a computer program for signal processing was designed. Using dichlorofluorescein, a concentration limit of detection (CLOD) of 350 pM was achieved and improved 10 times to 35 pM with computer postprocessing using 79 images. This is equal to 400 zeptomole for a 3-mm-long sample zone in a 50-mu m i.d. capillary.
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| 7. |
- Bengtsson, Peter, et al.
(författare)
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Cooperation in Planning of Production and Working Environments Supported by Computer Graphics
- 1996
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Ingår i: The International Journal of Human Factors in Manufacturing. - 1045-2699. ; 6:2, s. 101-130
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Tidskriftsartikel (refereegranskat)abstract
- A methodology for studying change processes in working life combining computer-aided planning and cooperation in project groups is evaluated. The methodology is applied and studied in a planning workshop with representatives from manufacturing industries—managers, production engineers, supervisors as well as shop floor workers—and from health-and-safety agencies utilizing the methodology for planning of production, layout, and working environment. The results are presented and discussed with respect to cooperation in project groups, outline of proposals, topics of discussion, and pictures as planning tools.
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