| 21. |
- Karlsson, Lennart, et al.
(author)
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Editorial
- 2013
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In: International Journal of Product Development. - Bucks, United Kingdom : InderScience Publishers. - 1477-9056 .- 1741-8178. ; 18:1, s. 1-2
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Journal article (peer-reviewed)
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| 22. |
- Karlsson, Lennart, et al.
(author)
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Mechanics of materials and structures: a simulation-driven design approach
- 2011
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In: Journal of Mechanics of Materials and Structures. - Berkeley, USA : Mathematical Sciences Publishers. - 1559-3959 .- 2157-5428. ; 6:1-4, s. 277-301
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Journal article (peer-reviewed)abstract
- Engineering product development has developed considerably over the past decade. In order for industry to keep up with continuously changing requirements, it is necessary to develop new and innovative simulation methods. However, few tools and methods for simulation-driven design have been applied in industrial settings and proven to actually drive the development and selection of the ideal solution. Such tools, based on fundamental equations, are the focus of this paper. In this paper the work is based on two cases of mechanics of materials and structures: welding and rotor dynamical simulations. These two examples of simulation-driven design indicate that a larger design space can be explored and that more possible solutions can be evaluated. Therefore, the approach improves the probability of innovations and finding optimal solutions. A calibrated block dumping approach can be used to increase the efficiency of welding simulations when many simulations are required.
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| 23. |
- Karlsson, Magnus, et al.
(author)
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Dipole antenna with integrated balun for ultra-wideband radio 6-9 GHz
- 2011
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In: Microwave and optical technology letters (Print). - : Wiley. - 0895-2477 .- 1098-2760. ; 53:1, s. 180-184
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Journal article (peer-reviewed)abstract
- A fully integrated dipole antenna with a balun fot ulna wideband (UWB) radio in the band 6-9 GHz utilizing a flexible and rigid printed count board is presented in this at tide The balun utilizes broadside coupled microstrips and is integrated in the rigid part of the printed coma boat d whereas the radiator is placed in the flexible pat! The antenna with the balun covets the frequency band 6 0-8 5 GHz at voltage standing mate ratio (VSWR) <2 0 and 55-110 GHz at VSWR < 2 5 Moreover simulated and measured radiation patterns and antenna efficiency above 860% are observed.
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| 24. |
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| 25. |
- Karlsson, Magnus, et al.
(author)
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International and ethnic variability of falls in older men
- 2014
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In: Scandinavian journal of public health. - : SAGE Publications. - 1651-1905 .- 1403-4948. ; 42:2, s. 194-200
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Journal article (peer-reviewed)abstract
- Aims: Fallers and especially recurrent fallers are at high risk for injuries. The aim of this study was to evaluate fall epidemiology in older men with special attention to the influence of age, ethnicity and country of residence. Methods: 10,998 men aged 65 years or above recruited in Hong Kong, the United States (US) and Sweden were evaluated in a cross-sectional retrospective study design. Self-reported falls and fractures for the preceding 12 months were registered through questionnaires. Group comparisons were done by chi-square test or logistic regression. Results: The proportion of fallers among the total population was 16.5% in ages 65-69, 24.8% in ages 80-84 and 43.2% in ages above 90 (P <0.001). The corresponding proportions of recurrent fallers in the same age groups were 6.3%, 10.1% and 18.2%, respectively (P <0.001), and fallers with fractures 1.0%, 2.3% and 9.1%, respectively (P <0.001). The proportion of fallers was highest in the US, intermediate in Sweden and lowest in Hong Kong (in most age groups P <0.05). The proportion of fallers among white men in the US was higher than in white men in Sweden (all comparable age groups P <0.01) but there were no differences in the proportion of fallers in US men with different ethnicity. Conclusions: The proportion of fallers in older men is different in different countries, and data in this study corroborate with the view that society of residence influences fall prevalence more than ethnicity.
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| 26. |
- Karlsson, Magnus K., et al.
(author)
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Prevention of falls in old people-a review
- 2013
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In: Reviews in Clinical Gerontology. - 0959-2598. ; 23:3, s. 206-222
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Research review (peer-reviewed)abstract
- Physical training, if including specific different training modalities, reduces the fall risk in healthy community-dwelling older people, as does a home hazards modification programme. Vitamin D supplementation in older individuals with low levels of vitamin D, adjustment of psychotropic medication, and structured modification of multi-pharmacy are all drug-focused programmes that reduce the number of falls. Anti-slip shoe devices during icy conditions for older people who walk outdoors and multifaceted podiatry in patients with specific foot disability reduce the fall risk. First eye cataract surgery and pacemakers in patients with cardio-inhibitory carotid sinus hypersensitivity are surgical interventions that reduce the fall risk. Multi-factorial preventive programmes that include training, both individually designed and generally prescribed, also reduce the fall frequency. With this in mind, we ought to initiate fall preventive programmes in older people, especially in high-risk groups, to reduce the number of falls and fallers in society.
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| 27. |
- Karlsson, Magnus, et al.
(author)
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Patients With Hip Osteoarthritis Have a Phenotype With High Bone Mass and Low Lean Body Mass.
- 2014
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In: Clinical Orthopaedics and Related Research. - : Ovid Technologies (Wolters Kluwer Health). - 0009-921X. ; 472:4, s. 1224-1229
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Journal article (peer-reviewed)abstract
- Although hip osteoarthritis (OA) is common, its etiology is poorly understood. Specifically, it is not known whether hip OA is associated with abnormal relationships among the anthropometric and musculoskeletal characteristics that are associated with OA in general.
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| 28. |
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| 29. |
- Karlsson, Magnus, et al.
(author)
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Prevention of falls in the elderly: A review.
- 2013
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In: Scandinavian Journal of Public Health. - : SAGE Publications. - 1651-1905 .- 1403-4948. ; 41:5, s. 442-454
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Research review (peer-reviewed)abstract
- Aims: Falls often result in soft tissue injuries, dislocations, fractures, longstanding pain and reduced quality of life. Therefore, fall preventive programmes have been developed. Methods: In this review, we evaluate programmes that in randomized controlled trials (RCT) have been shown with fall reducing effect. Results: Physical exercise that includes several training modalities, especially balance and strength training, is the only intervention programme that reduces both the number of fallers and the number of falls in community dwellers. Home hazards modification reduces the fall risk in community-living elderly but has the best effects in high risk groups when the programme is led by occupational therapists. Vitamin D supplement in those with low levels of vitamin D, adjustment of psychotropic medication and modification of multi-pharmacy are drug-related programmes that reduce the fall risk. Anti-slip shoe devices in elderly who walk outdoors during icy conditions and multifaceted podiatry to patients with specific foot disability are interventions targeted at the lower extremities with a fall-reducing effect. First eye cataract surgery and pacemakers in patients with cardio-inhibitory carotid sinus hypersensitivity are surgical procedures with fall-reducing effect. Multifactorial standardized preventive programmes that include an exercise component and individually-designed subject-specific programmes also reduce the number of falls. Conclusions: Fall preventive interventions should be provided to elderly by a structured approach, especially to high risk groups, as to reduce the number of falls and fallers.
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| 30. |
- Kullander, Sven, 1952-, et al.
(author)
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Chalinochromis cyanophleps, a new species of cichlid fish (Teleostei: Cichlidae) from Lake Tanganyika
- 2014
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In: Zootaxa. - : Magnolia Press. - 1175-5326 .- 1175-5334. ; 3790:3, s. 425-438
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Journal article (peer-reviewed)abstract
- Chalinochromis cyanophleps is described from nine specimens, the largest 129 mm SL, from Namansi. It differs fromother species of Chalinochromis in plain trunk colouration, absence of black stripes on the head, relatively narrow lips, presence of tricuspid jaw teeth, and presence of five rather than four dentary lateralis foramina. The blue iridescent stripe below the eye is shared with other lamprologin cichlids, but is broader and more conspicuous in C. cyanophleps. Chalinochromis cyanophleps occurs at depths between 6 and 45 m in rocky habitats along the Tanzanian coast of Lake Tanganyika,from Mvuna Island south to Kalala Island, a stretch of about 90 km. Field observations were made of specimens up to 18 cm total length. The COI DNA barcode sequence differs by 1.8% from that of C. popelini.
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