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- Andersson, Eleonor I., et al.
(författare)
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Performance Tests in People With Chronic Low Back Pain Responsiveness and Minimal Clinically Important Change
- 2010
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Ingår i: Spine. - : J B Lippincott Co. - 0362-2436 .- 1528-1159. ; 35:26, s. E1559-E1563
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Tidskriftsartikel (refereegranskat)abstract
- Study Design. Cohort study. Objective. To assess the responsiveness and minimal clinically important change (MCIC) of 6 commonly-used performance tests (5-minute walking, 50-ft walking, sit-to-stand, 1 minute stair climbing, loaded forward reach, Progressive Isoinertial Lifting Evaluation). Summary of Background Data. Performance tests are used to evaluate physical function in people with low back pain. Little is known about their clinimetric properties. Methods. Performance tests were administered in people with chronic nonspecific low back pain (n = 198) before and after 10 weeks of treatment. At 10 weeks, the global perceived effect scale was used to determine if participants judged themselves as worsened, unchanged, or improved. The mean change scores for each performance test were calculated. A performance test was considered responsive if the area under the receiver operating characteristic curve (AUC) was equal to or greater than 0.70. We used 2 methods to evaluate MCIC: the optimal cut-off point based on the receiver operating characteristic curve, which takes into account both sensitivity and specificity, and the minimal detectable change for improvement, which considers test specificity only. Results. In general, the mean change scores were the smallest in participants who judged themselves worsened and largest in those reporting to be improved. Sit-to-stand (AUC = 0.75) and stair climbing (AUC = 0.72) were the only performance tests that showed adequate responsiveness. For sit-to-stand, the MCIC ranged from 4.1 to 9.8 seconds (19%-45% of the mean baseline score). For stair climbing, the MCIC ranged from 14.5 to 23.9 steps (19%-31% of the mean baseline score). Conclusion. Only 2 of the 6 performance tests were responsive. Both had acceptable MCIC values. Developing individualized performance tests might partly overcome the general lack of responsiveness of performance tests. Future research should focus on the clinimetric testing of performance tests in subgroups.
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- Boyer, E, et al.
(författare)
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SHREC 2011: Robust Feature Detection and Description Benchmark
- 2011
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Konferensbidrag (refereegranskat)abstract
- Feature-based approaches have recently become very popular in computer vision and image analysis applications, and are becoming a promising direction in shape retrieval. SHREC’11 robust feature detection and description benchmark simulates the feature detection and description stages of feature-based shape retrieval algorithms. The benchmark tests the performance of shape feature detectors and descriptors under a wide variety of transformations. The benchmark allows evaluating how algorithms cope with certain classes of transformations and strength of the transformations that can be dealt with. The present paper is a report of the SHREC’11 robust feature detection and description benchmark results.
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- Dees, M., et al.
(författare)
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Status and Future of Biomass Assessment for Energetic Use in Europe
- 2012
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Ingår i: 20th European Biomass Conference and Exhibition. - 9788889407547 ; , s. 23-24
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Konferensbidrag (refereegranskat)abstract
- Results from biomass potential assessments vary considerably, both on global and European level. On the other hand reliable figures on biomass potentials are an important basis for energy policy and for strategies that aim at an increase of use of biomass for energy both on EU-Level as well as e. g. on national level in the National Renewable Energy Action Plans (NREAPs) by the 27 member states. This paper is based on the findings of two projects, BEE and CEUBIOM. It presents an overview of the findings of these projects and includes an analysis of biomass potential aspects within the NREAPs. It presents how, based on an analysis of the status quo of potential studies, the projects developed proposals for a harmonisation of the methodologies and it presents the key areas they identified for future work in the field.
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- Smeets, Stef, et al.
(författare)
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High-Silica Zeolite SSZ-61 with Dumbbell-Shaped Extra-Large-Pore Channels
- 2014
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Ingår i: Angewandte Chemie International Edition. - : Wiley. - 1433-7851 .- 1521-3773. ; 53:39, s. 10398-10402
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Tidskriftsartikel (refereegranskat)abstract
- The synthesis of the high-silica zeolite SSZ-61 using a particularly bulky polycyclic structure-directing agent and the subsequent elucidation of its unusual framework structure with extra-large dumbbell-shaped pore openings are described. By using information derived from a variety of X-ray powder diffraction and electron microscopy techniques, the complex framework structure, with 20 Si atoms in the asymmetric unit, could be determined and the full structure refined. The Si atoms at the waist of the dumbbell are only three-connected and are bonded to terminal O atoms pointing into the channel. Unlike the six previously reported extra-large-pore zeolites, SSZ-61 contains no heteroatoms in the framework and can be calcined easily. This, coupled with the possibility of inserting a catalytically active center in the channel between the terminal O atoms in place of H+, afford SSZ-61 intriguing potential for catalytic applications.
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