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1دورية أكاديمية
المساهمون: The Pennsylvania State University CiteSeerX Archives
مصطلحات موضوعية: treadmill training, stroke, vascular endothelial growth factor, matrix metalloproteinase 2, bevacizumabInt. J. Mol. Sci. 2013, 14 8571
الوصف: The induction of angiogenesis will stimulate endogenous recovery mechanisms, which are involved in the long-term repair and restoration process of the brain after an ischemic event. Here, we tested whether exercise influences the pro-angiogenic factors and outcomes after cerebral infarction in rats. Wistar rats were exposed to two hours of middle-cerebral artery occlusion and reperfusion. Different durations of treadmill training were performed on the rats. The expression of matrix metalloproteinase 2 (MMP2) and vascular endothelial growth factor (VEGF)-related genes and proteins were higher over time post-ischemia, and exercise enhanced their expression. Sixteen days post-ischemia, the regional cerebral blood flow in the ischemic striatum was significantly increased in the running group over the sedentary. Although no difference was seen in infarct size between the running and sedentary groups, running evidently improved the neurobehavioral score. The effects of running on MMP2 expression, regional cerebral blood flow and outcome were abolished when animals were treated with bevacizumab (BEV), a VEGF-targeting antibody. Exercise therapy improves long-term stroke outcome by MMP2-VEGF-dependent mechanisms related to improved cerebral blood flow.
العلاقة: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.298.1421; http://www.mdpi.com/1422-0067/14/4/8570/pdfTest/
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2دورية أكاديمية
المؤلفون: Patrick A. Willems, Thierry P. Gosseye
المساهمون: The Pennsylvania State University CiteSeerX Archives
مصطلحات موضوعية: Key words, Locomotion, Instrumented treadmill, Ground reaction
الوصف: an instrumented treadmill correctly measure the
وصف الملف: application/pdf
العلاقة: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.692.569; http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3863428/pdf/bio-02-12-1421.pdfTest
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3دورية أكاديمية
المؤلفون: April Ash, Stephen Palmisano, Deborah Apthorp, Robert S Allison
المساهمون: The Pennsylvania State University CiteSeerX Archives
مصطلحات موضوعية: vection, locomotion, treadmill, optic flow, multisensory
الوصف: Vection has typically been induced in stationary observers (ie conditions providing visual-only information about self-motion). Two recent studies have examined vection during active treadmill walking—one reported that treadmill walking in the same direction as the visually simulated self-motion impaired vection (Onimaru et al, 2010 Journal of Vision 10(7):860), the other reported that it enhanced vection (Seno et al, 2011 Perception 40 747–750; Seno et al, 2011 Attention, Perception, & Psychophysics 73 1467–1476). Our study expands on these earlier investigations of vection during observer active movement. In experiment 1 we presented radially expanding optic flow and compared the vection produced in stationary observers with that produced during walking forward on a treadmill at a ‘matched ’ speed. Experiment 2 compared the vection induced by forward treadmill walking while viewing expanding or contracting optic flow with that induced by viewing playbacks of these same displays while stationary. In both experiments subjects ’ tracked head movements were either incorporated into the self-motion displays (as simulated viewpoint jitter) or simply ignored. We found that treadmill walking always reduced vection (compared with stationary viewing conditions) and that simulated viewpoint jitter always increased vection (compared with constant velocity displays). These findings suggest that while consistent visual–vestibular information about self-acceleration increases vection, biomechanical self-motion information reduces this experience (irrespective of whether it is consistent or not with the visual input).
العلاقة: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.456.7458
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4دورية أكاديمية
المؤلفون: Florian Larrue, Fabien Lotte, Hélène Sauzeon, Martin Hachet, Lioubov Aguilova
المساهمون: The Pennsylvania State University CiteSeerX Archives
مصطلحات موضوعية: H.1.2 [Information Systems, Models and Principles, User/Machine Systems- Human factors, Human information processing, Software psychology, H.5.2 [Information Systems, User interfaces – Ergonomics, Evaluation/methodology, Theory and method, User-centered design. General Terms Human Factors, Measurement, Performance, Experimentation. Keywords Interfaces, Navigation, Virtual Reality, Spatial Cognition, Treadmill, Brain Computer Interface, User Study
الوصف: The goal of this study is to explore new navigation methods in Virtual Reality (VR) and to understand the impact of motor activity on spatial cognition, and more precisely the question of the spatial learning transfer. We present a user study comparing two interfaces with different motor activities: the first one, a walking interface (a treadmill with rotation) gives the user a high level of sensorimotor activity (especially body-based and vestibular information). The second one, a brain computer interface (BCI), enables the user to navigate in a virtual environment (VE) without any motor activity, by using brain activity only. The task consisted in learning a path in a virtual city built from a 3D model of a real city with either one of these two interfaces (named treadmill condition and BCI condition), or in the real city directly (the real condition). Then, participants had to
وصف الملف: application/pdf
العلاقة: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.393.1584; http://hal.inria.fr/docs/00/74/35/22/PDF/larrue_et_al._2012.pdfTest
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5دورية أكاديمية
المؤلفون: Christopher James Tyler, Caroline Sunderland
المساهمون: The Pennsylvania State University CiteSeerX Archives
المصدر: http://www.setantacollege.com/wp-content/uploads/Journal_db/NeckTest Cooling and Running Performance in.pdf.
مصطلحات موضوعية: Key Words, HYPERTHERMIA, THERMOREGULATION, TREADMILL, EXHAUSTION, FATIGUE, PACING I
الوصف: during time trial running in a hot environment.Methods: Seven nonacclimated, familiarized males completed three experimental 90-min preloaded time trials in the heat (30.4-C T 0.1-C and 53 % T 2 % relative humidity). During one of the trials, the, participants wore a cooling collar from the start (CC); in another, they wore a collar from the start which was replaced at 30-min intervals (CCreplaced); and in the last trial, they wore no collar (NC). Participants ran for 75 min at 60 % V̇O2max and then performed a 15-min time trial blinded from the distance ran. Distance ran, rectal temperature, neck skin temperature, HR, fluid loss and consumption, peripheral lactate, glucose, dopamine, serotonin and cortisol, RPE, thermal sensation, and feeling scales were recorded. Significance was set a priori at the P G 0.05 level. Results: Participants ran further in CC (2779 T 299 m) compared with NC (2597 T 291 m, P = 0.007; d = 0.67) and in CCreplaced (2776 T 331 m) compared with NC (P = 0.008; d = 0.62). There was no difference in the distance covered in CC compared with that in CCreplaced (P = 0.998). The collar lowered neck temperature (P G 0.001) and the thermal sensation of the neck region (P G 0.001) but had no effect on any of the other physiological, endocrinological, or perceptual variables. Conclusions: Cooling the surface of the neck improves time trial performance in a hot environment without altering physiological or neuroendocrinological responses. Maintenance of a lower neck temperature via the replacement of a CC has no additional benefit to an acute cooling intervention.
وصف الملف: application/pdf
العلاقة: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.452.5203; http://www.setantacollege.com/wp-content/uploads/Journal_db/NeckTest Cooling and Running Performance in.pdf
الإتاحة: http://www.setantacollege.com/wp-content/uploads/Journal_db/NeckTest Cooling and Running Performance in.pdf
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6دورية أكاديمية
المؤلفون: Society O F, Falko Frese, Susanne Hupfer, Birgit Friedmann-bette
المساهمون: The Pennsylvania State University CiteSeerX Archives
مصطلحات موضوعية: rehabilitation, training, treadmill protocol
الوصف: Insufficient control of exercise intensity by heart rate monitoring in cardiac patients
وصف الملف: application/pdf
العلاقة: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1029.4326; http://cpr.sagepub.com/content/early/2011/04/02/1741826711406832.full.pdfTest
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7دورية أكاديمية
المؤلفون: Society O F, Falko Frese, Susanne Hupfer, Birgit Friedmann-bette
المساهمون: The Pennsylvania State University CiteSeerX Archives
مصطلحات موضوعية: rehabilitation, training, treadmill protocol
الوصف: Insufficient control of exercise intensity by heart rate monitoring in cardiac patients
وصف الملف: application/pdf
العلاقة: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1025.7412; http://cpr.sagepub.com/content/19/3/436.full.pdfTest
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8دورية أكاديمية
المؤلفون: Betsey Stevenson, Justin Wolfers
المساهمون: The Pennsylvania State University CiteSeerX Archives
مصطلحات موضوعية: Happiness, subjective well-being, Easterlin Paradox, life satisfaction, economic growth, well-being-income gradient, hedonic treadmill JEL codes
الوصف: www.nber.org/~jwolfers The “Easterlin Paradox ” suggests that there is no link between the level of economic development of a society and average levels of happiness. We return to Easterlin’s question: “Will raising the incomes of all increase the happiness of all? ” and analyze multiple rich datasets spanning recent decades and a broader array of countries. We establish a clear positive link between GDP and average levels of subjective well-being across countries with no evidence of a satiation point beyond which wealthier countries have no further increases in subjective well-being. Moreover, we show that this relationship is consistent with the relationship between income and happiness within countries, suggesting a minimal role for relative income comparisons as drivers of happiness. Finally, we examine the relationship between changes in subjective well-being and income over time within countries, finding that economic growth has been associated with rising happiness.
العلاقة: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.337.7843
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9دورية أكاديمية
المؤلفون: Hyun Gu Kang, Jonathan B. Dingwell
المساهمون: The Pennsylvania State University CiteSeerX Archives
مصطلحات موضوعية: Reliability, Gait stability, Local dynamic stability, Walking, Treadmill
الوصف: While local dynamic stability measures have been successfully used to characterize walking stability, they require long continuous walking data, which may be difficult to obtain from a clinical population. We investigated the amount of walking data necessary to obtain reliable measures of local dynamic stability. Twenty healthy adults walked on a motorized treadmill at their self-selected speed for three trials of 5 min each. Trunk motion was used to construct a 12-dimensional state space comprised of the linear and angular positions and velocities. Mean divergence of locally perturbed trajectories was calculated as a measure of local dynamic stability using the first 1–5 min of data from each trial. Exponential divergence rates were quantified. Divergence was also parameterized using a double-exponential function. Intra-class correlation coefficients ICC(2,1) were calculated for each divergence measure for each trial length. ICC(2, 1) values increased with trial length, and reached 0.5–0.9. Good reliability was obtained for short-term measures for trial lengths of 2 and 3 min, but 5 min was not adequate to estimate the long-term coefficients based on a single trial.
وصف الملف: application/pdf
العلاقة: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.391.607; http://www.edb.utexas.edu/faculty/dingwell/files/Kang_Dingwell_06b.pdfTest
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10دورية أكاديمية
المؤلفون: Ji Soo Yi, Young Sang Choi, Julie A. Jacko, Andrew Sears
المساهمون: The Pennsylvania State University CiteSeerX Archives
مصطلحات موضوعية: General Terms Measurement, Experimentation, Human Factors Keywords Context-awareness, Accelerometer, Mobile computing, Pen-based handheld device, Sitting, Treadmill, Walking, Gait
الوصف: Interest in context-aware computing has expanded the use of sensing technologies. The accelerometer is one of the most widely used sensors for capturing context because it is small, inexpensive, lightweight, and self-operable. In efforts to obtain behavioral patterns, many studies have reported the use of multiple accelerometers attached to the human body. However, this is difficult to implement in real-life situations and may not fully address the context of user interaction. In contrast, the present study employed a single tri-axial accelerometer attached to a handheld computing device instead of to a user. The objective was to determine what contextual information could be obtained from this more feasible, albeit limited, source of acceleration data. Data analyses confirmed that changes in both mobility and lighting conditions induced statistically significant differences in the output of the accelerometer. Categories and Subject Descriptors H.5.2 [User Interfaces]: Interaction styles (e.g., commands, menus, forms, direct manipulation)
وصف الملف: application/pdf
العلاقة: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.461.5608; http://pdf.aminer.org/000/495/481/context_awareness_via_a_single_device_attached_accelerometer_during_mobile.pdfTest
