| 1. |
- Eman, Josefin, 1983-
(författare)
-
The complexity of physical capital : How old male athletes relate to body and health
- 2013
-
Ingår i: International Journal of Men's Health. - : Men's Studies Press. - 1532-6306 .- 1933-0278. ; 12:1, s. 29-41
-
Tidskriftsartikel (refereegranskat)abstract
- The aim of the present article was to explore how a relatively privileged group of old men, e.g. old athletes, relate to their bodies and health in the process of growing old. Ten male athletes from 68 to 90 years of age were interviewed in this grounded theory study. The findings suggest that the old male athletes controlled their bodies in order to gain physical capital, but that different ways of employing the body were valued in different contexts. Three such contexts were identified: the aging, athletic and masculine context. In an aging context, the men emphasized the importance of caring for one’s body and health, but in an athletic and masculine context, they expressed both a caring and a non-caring approach to body and health. In other words, on the whole the men displayed a contradictious way of relating to their bodies and health. However, they could to some extent reconcile the tensions between the different norms of body and health by emphasizing the need to preserve physical autonomy, an ideal that appeared to be valid in all three contexts.
|
|
| 2. |
|
|
| 3. |
- Månsson, Kristofer, 1983-
(författare)
-
A Wavelet-Based Approach of Testing for Granger Causality in the Presence of GARCH Effects
- 2012
-
Ingår i: Communications in Statistics - Theory and Methods. - : Taylor & Francis. - 0361-0926 .- 1532-415X. ; 41:4, s. 717-728
-
Tidskriftsartikel (refereegranskat)abstract
- The size and power of the most commonly used tests and a new wavelet-based approach of testing for Granger causality is evaluated in this paper by means of a Monte Carlo study in which the error term follows a generalized autoregressive conditional heteroscedasticity consistent (GARCH) process. In the simulation study it is shown that the commonly used causality tests tends to over-reject the true null hypothesis in the presence of GARCH errors and that the new wavelet-based approach improves the size properties of the Granger causality test for all of the different situations evaluated.
|
|
| 4. |
- Östh, Jonas, 1983, et al.
(författare)
-
Driver Kinematic and Muscle Responses in Braking Events with Standard and Reversible Pre-tensioned Restraints: Validation Data for Human Models
- 2013
-
Ingår i: Stapp car crash journal. - 400 Commonwealth Drive, Warrendale, PA, United States : SAE International. - 1532-8546. ; 57, s. 1-41
-
Tidskriftsartikel (refereegranskat)abstract
- The objectives of this study are to generate validation data for human models intended for simulation of occupant kinematics in a pre-crash phase, and to evaluate the effect of an integrated safety system on driver kinematics and muscle responses. Eleven male and nine female volunteers, driving a passenger car on ordinary roads, performed maximum voluntary braking; they were also subjected to autonomous braking events with both standard and reversible pre-tensioned restraints. Kinematic data was acquired through film analysis, and surface electromyography (EMG) was recorded bilaterally for muscles in the neck, the upper extremities, and lumbar region. Maximum voluntary contractions (MVCs) were carried out in a driving posture for normalization of the EMG. Seat belt positions, interaction forces, and seat indentions were measured.During normal driving, all muscle activity was below 5% of MVC for females and 9% for males. The range of activity during steady state braking for males and females was 13–44% in the cervical and lumbar extensors, while antagonistic muscles showed a co-contraction of 2.3–19%. Seat belt pre-tension affects both the kinematic and muscle responses of drivers. In autonomous braking with standard restraints, muscle activation occurred in response to the inertial load. With pre-tensioned seat belts, EMG onset occurred earlier; between 71 ms and 176 ms after belt pre-tension. The EMG onset times decreased with repeated trials and were shorter for females than for males. With the results from this study, further improvement and validation of human models that incorporate active musculature will be made possible.
|
|
| 5. |
- Löfström Engdahl, Elin, 1983, et al.
(författare)
-
Comparison of the Extraction as a Function of Time in two GANEX solvents -Influence of Metal Loading, Interfacial Tension and Density
- 2013
-
Ingår i: Solvent Extraction and Ion Exchange. - : Informa UK Limited. - 0736-6299 .- 1532-2262. ; 31:6, s. 604-616
-
Tidskriftsartikel (refereegranskat)abstract
- Two Group ActiNide EXtraction solvents for the extraction of actinides from used nuclear fuel for transmutation purpose have been compared. The solvent studied more precisely comprises cyclohexanone, tributylphosphate and a molecule from the bis-triazine bi-pyridine family, whilethe alternative utilizes di-ethyl-hexyl butyramide instead of tributylphospate. The focus of the comparison has been on the kinetics of the extraction of americium and europium, and the influence of an increased metal content on their separation factor. Both systems showed to maintain the equilibrium separation factor up to an europium concentration of 1 mM and their SFAm/Eu is decreased with a prolonged phase contact.
|
|
| 6. |
- Kinzer, M., et al.
(författare)
-
Mesenchymal stromal cells from the human placenta promote neovascularization in a mouse model in vivo.
- 2014
-
Ingår i: Placenta. - London : W. B. Saunders Co Ltd. - 0143-4004 .- 1532-3102. ; 35:7, s. 517-519
-
Tidskriftsartikel (refereegranskat)abstract
- Cell transplantation is a promising strategy in regenerative medicine for revascularization of ischemic tissues. Based on our observation that placental mesenchymal stromal cells (PMSC) enhance endothelial cell viability in vitro via secretion of angiogenic factors, we asked whether PMSC support vascular growth in vivo. PMSC were isolated from amnion and placental endothelial cells (PLEC) from chorion and either separately or co-transplanted subcutaneously into immune-deficient mice. Co-transplantation resulted in a higher number of perfused human vessels (CD31+/vimentin+) containing mouse glycophorin A+ erythrocytes. Results indicate positive effects of PMSC on neovascularization in vivo, making them attractive candidates to create autologous PMSC/PLEC pairs for research and transplantation.
|
|
| 7. |
- Nordstierna, Lars, 1976, et al.
(författare)
-
New Route for Microcapsule Synthesis
- 2011
-
Ingår i: Journal of Dispersion Science and Technology. - : Informa UK Limited. - 1532-2351 .- 0193-2691. ; 32:3, s. 310-311
-
Tidskriftsartikel (refereegranskat)abstract
- Studies on the growth of microorganisms on painted surfaces and other coatings has increased during the last decades as many antigrowth agents have gradually been prohibited due to toxicity. Current applications using biocides lose the protection quite rapidly as small molecular size renders a fast diffusional biocide leakage. A promising improvement of antigrowth protection can be achieved by the use of encapsulated biocides in the paint. The candidate method to produce microcapsules has dichloromethane as a key constituent in the synthesis step.[3] Dichloromethane is hazardous and thereby often not allowed to be used at industrial scale. In this article, we show that ethyl acetate has equivalent physiochemical properties as dichloromethane in the production of microcapsules and thus can be used in order to fulfill legislative criteria.
|
|
| 8. |
|
|
| 9. |
- Retegan Vollmer, Teodora, 1979, et al.
(författare)
-
Synthesis and Screening of t-Bu-CyMe4-BTBP, and Comparison with CyMe4-BTBP
- 2014
-
Ingår i: Solvent Extraction and Ion Exchange. - : Informa UK Limited. - 0736-6299 .- 1532-2262. ; 32:7, s. 720-736
-
Tidskriftsartikel (refereegranskat)abstract
- The effect of adding a t-butyl group to the core molecule of CyMe4-BTBP, with the aim of improving solubility in organic diluents, has been studied with regard to the extraction of Am(III) and Eu(III) from HNO3. Synthesis of t-Bu-CyMe4-BTBP is described in detail. Metal nitrates are extracted from nitric acid in the form of 1:2 complexes, M(NO3)(3)(BTBP)(2). Whether in 1-octanol, kerosene, or cyclohexanone diluents, t-Bu-CyMe4-BTBP extracts with larger distribution ratios but with slower kinetics than CyMe4-BTBP. The general trends previously observed for CyMe4-BTBP regarding the diluent and modifier influence were also found for t-Bu-CyMe4-BTBP.
|
|
| 10. |
- Shukur, Ghazi, 1955-, et al.
(författare)
-
A Simulation Study of Some Ridge Regression Estimators under Different Distributional Assumptions
- 2010
-
Ingår i: Communications in statistics. Simulation and computation. - : Taylor & Francis. - 0361-0918 .- 1532-4141. ; 39:8, s. 1639-1670
-
Tidskriftsartikel (refereegranskat)abstract
- Based on the work of Khalaf and Shukur (2005), Alkhamisi et al. (2006), and Muniz et al. (2010), this article considers several estimators for estimating the ridge parameter k. This article differs from aforementioned articles in three ways: (1) Data are generated from Normal, Student's t, and F distributions with appropriate degrees of freedom; (2) The number of regressors considered are from 4-12 instead of 2-4, which are the usual practice; (3) Both mean square error (MSE) and prediction sum of square (PRESS) are considered as the performance criterion. A simulation study has been conducted to compare the performance of the estimators. Based on the simulation study we found that, increasing the correlation between the independent variables has negative effect on the MSE and PRESS. However, increasing the number of regressors has positive effect on MSE and PRESS. When the sample size increases the MSE decreases even when the correlation between the independent variables is large. It is interesting to note that the dominance pictures of the estimators are remained the same under both the MSE and PRESS criterion. However, the performance of the estimators depends on the choice of the assumption of the error distribution of the regression model.
|
|
