| 1. |
- Andersson, Roger, et al.
(författare)
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Large Housing Estates in Sweden. Overview of developments and problems in Jönköping and Stockholm
- 2003
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- All over Europe massive numbers of people live in large-scale housing estates built after the Second World War. The estates were carefully planned, but now often manifest a mulitude af problems. They house large numbers of low-income households, the unemployment rates are above average and in some countries they have become concentration areas for ethnic minorities. Many estates are becoming increasingly associated with crime and social exclusion. The circumstances on the estates and policy initiatives associated with these are focus of the RESTATE-project. RESTATE is the acronym for Restructuring Large-scale Housing Estates in European Cities: Good Practices and New Visions for Sustainable Neighbourhoods and Cities. The study draws on estates in ten European countries: France, Germany, Hungary, Italy, the Netherlands, Poland, Slovenia, Spain, Sweden and the United Kingdom. The present report deals specifically with large housing estates in two cities in Sweden: Jönköping och Stockholm. The basic questions are about physical structure, demographic-, economic- and socio-cultural developments. The same kind of information for estates in other countries in the RESTATE-project can be found in the parallel reports
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| 2. |
- Andrén, Linus, et al.
(författare)
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Active Control of Boring Bar Vibrations Using the Leaky Feedback Filtered X-LMS
- 2003
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Konferensbidrag (refereegranskat)abstract
- The boring operation is a cumbersome manufacturing process marred by noise and vibration related problems. The manufacturing industry is having trouble with these kinds of metal cutting operations. There exist several approaches to reduce the vibrations in cutting operations in general. Passive tuned dampers in boring bars have been commercially available for some time. An active solution is likely to be more robust to changes in the spectral content, where the passive counterpart have a small operable area, the active solution is able to adapt to these kinds of changes. Active vibration control in boring operations has been proven to be feasible. The algorithm used in the successful experiments was the feedback filtered X-LMS algorithm. This algorithm does however not guarantee a stable behavior, but incorporating a leakage factor will make the algorithm more robust. Power spectral density of boring bar vibration of real cutting experiments show that the leaky filtered X-LMS algorithm is a possible candidate to be a suitable control algorithm. Nyquist diagrams of the controller during operation show that the stability is increased significantly.
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| 3. |
- Andrén, Linus, et al.
(författare)
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Active Control of Machine Tool Vibrations in External Turning Operations
- 2003
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Ingår i: Proceedings of the Institution of mechanical engineers. Part B, journal of engineering manufacture. - 0954-4054 .- 2041-2975. ; 217:6, s. 869-872
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Tidskriftsartikel (refereegranskat)abstract
- Vibration and noise in metal cutting are ubiquitous problems in the workshop. The external turning operation is one kind of metal cutting that exhibits vibration related problems. Severe noise is also a problem growing in proportion due to regulations in preventing hearing loss. Active vibration control is a potential solution to such problems. With the piezo ceramic actuator technology of today, the size of the actuator can be kept small and still be able to produce a sufficient amount of force for the anti vibrations. Results from several continuous cutting experiments show a 40 dB reduction of the cutting tool vibration level. The design of the active technique enables this technology to be applicable to a general lathe provided the mounting arrangement is fairly similar.
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| 4. |
- Andrén, Linus, et al.
(författare)
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Performance Evaluation of Active Vibration Control of Boring Operations Using Different Active Boring Bars
- 2003
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Konferensbidrag (refereegranskat)abstract
- Vibration and noise in boring operations are ubiquitous problems in the workshop. In boring operations, the boring bar is subjected to forces from both the cutting speed and the cutting depth direction. To solve the vibration problem using active techniques would normally require two actuators in order to enable the control of both directions. By mounting one actuator in between the cutting speed and the cutting depth direction it is possible to achieve an active control solution with one actuator. Using only one actuator not only simplifies the control algorithm and saves extra equipment but is also favourable in terms of modifications of the boring bar. The harsh environment in a lathe more or less requires that both sensors and actuators are embedded and sealed into the boring bar. Since the forces that are to be controlled are large, the space needed for the actuator is substantial. Thus using only one actuator will keep the modified boring bar stiffer than a two actuator design. Three boring bars with the actuator mounted at different angles between the cutting speed and the cutting depth directions have been tested. Results from cutting experiments show that the one actuator solution has good potentials to the vibration problem in boring operations.
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| 5. |
- Appelquist, Joakim, et al.
(författare)
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SMILE Revisited
- 2003
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- The mobile service "SMILE" supporting care of the elderly is evaluated from an economic as well as an work practice perspective.
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| 6. |
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Arkiven i forskningens tjänst
- 2003
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Samlingsverk (redaktörskap) (övrigt vetenskapligt/konstnärligt)abstract
- Begreppet "forskande lärande" ges en innebörd så som det utvecklades i skolprojektet MIS (Människan i samhällsomvandlingen).
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| 7. |
- Arman, Maria, et al.
(författare)
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The hidden suffering among breast cancer patients : A qualitative metasynthesis
- 2003
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Ingår i: Qualitative Health Research. - THOUSAND OAKS : SAGE PUBLICATIONS INC. - 1049-7323 .- 1552-7557. ; , s. 510-527
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to review literature on how the lived experience of breast cancer and suffering was described in nursing/caring literature between 1990 and 2000, and to interpret and discuss the result from the perspective of suffering. The frequent reports of changing courses, called by various names, such as transition, transformation, transcendence, and finding meaning, werefound as paths whereby the person regained integrity, balance, and wholeness. When findings were interpreted from the perspective of suffering and an ontological health model, actions, values, and existential concerns were understood as both expedients for alleviating suffering and a sign of the patient's inner struggle.
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| 8. |
- Aurum, Aybüke, et al.
(författare)
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The Fundamental Nature of Requirements Engineering Activities as a Decision-Making Process
- 2003
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Ingår i: Information and Software Technology. - : Elsevier. - 0950-5849 .- 1873-6025. ; 45:14, s. 945-954
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Tidskriftsartikel (refereegranskat)abstract
- The requirements engineering (RE) process is a decision-rich complex problem solving activity. This paper examines the elements of organization-oriented macro decisions as well as process-oriented micro decisions in the RE process and illustrates how to integrate classical decision-making models with RE process models. This integration helps in formulating a common vocabulary and model to improve the manageability of the RE process, and contributes towards the learning process by validating and verifying the consistency of decision-making in RE activities.
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| 10. |
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