Differences between the sexes in the three-dimensional angular rotations of the lumbo-pelvic-hip complex during treadmill running     

Schache AG  Blanch P  Rath D  Wrigley T  Bennell K 《Journal of sports sciences》2003,21(2):105-118

The aims of this experiment were to determine whether there are differences between the sexes in the three-dimensional angular rotations of the lumbo-pelvic-hip complex during running and, if such differences exist, to establish whether factors other than sex can explain the observed differences. A cohort of 44 non-injured runners (22 males, 22 females) who usually ran more than 20 km per week were voluntarily recruited. All trials were conducted on a treadmill at a running speed of 4.0 m x s(-1). Reflective markers were placed over specific anatomical landmarks of the thoraco-lumbar spine, pelvis and femur. Data were captured using a VICON motion analysis system. Females tended to display a greater peak-to-peak oscillation for most of the angular rotations. An offset was the main difference between the male and female group mean waveforms for pelvis anterior-posterior tilt. Forward stepwise regression analysis revealed that sex was the most common variable related to the amplitudes of the angular rotations. Given these results, sport scientists conducting future biomechanical studies using angular data to test hypotheses are advised to be extremely cautious about averaging across male and female participants.  相似文献   

Planning a master’s program in publishing     

Rowland Lorimer 《Publishing Research Quarterly》1990,6(1):38-47

The Canadian Centre for Studies in Publishing at Simon Fraser University is about to admit its first students. This article describes the founding of the Centre and the evolution of its curriculum. In its present form, the curriculum combines advice from the industry and the academic requirements of the university. Rowland Lorimer is professor of communication at Simon Fraser University. He is director of the Centre for Canadian Studies and co-director (Research and Credit Curriculum), Canadian Centre for Studies in Publishing. He is active in research in publishing policy and mass communications.  相似文献   

Australia     

Tim Coronel 《Publishing Research Quarterly》2008,24(3):147-148

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Editorial     

Bob Bibby  Tim Noble 《English in Education》1987,21(3):1-2

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Access management: the overlooked but critical enabler          下载免费PDF全文

Tim LLOYD 《Learned Publishing》2015,28(4):292-297

• Access management (AM) is a critical, but often overlooked, enabler for publishers looking to expand the appeal of their online resources.
• This article examines why publishers underinvest in AM, and provides practical examples of how this impacts productivity and growth across the organization.
• Three AM trends that offer new growth opportunities are also explored: (i) enabling a wider range of customer types and business models, (ii) supporting a more diverse range of access scenarios, and (iii) facilitating greater personalization through identity management.
• Publishers need to review their AM strategy in light of these opportunities. In particular, publishers that currently support AM in‐house should outsource to specialist vendors if they are not fully committed to investing the expertise and time needed to support this increasing sophistication.

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Evolution of the Transfer Code of Practice          下载免费PDF全文

James PHILLPOTTS  Tim DEVENPORT  Alison MITCHELL 《Learned Publishing》2015,28(1):75-79

The Transfer Code of Practice was launched in 2008 as a set of best‐practice guidelines to be followed when a journal changes publisher, with the aim of ensuring uninterrupted access to content for subscribers. The Code has now been updated to reflect the continued evolution of the academic publishing process driven by new technologies, policies, and publishing practices.  相似文献   

Knowledge of bout duration influences pacing strategies during small-sided games     

John Andrew Sampson  Hugh Head Kelsham Fullagar  Tim Gabbett 《Journal of sports sciences》2015,33(1):85-98

This investigation examines pacing during intermittent team sports. Sixteen junior Rugby League players participated in eight different small-sided offside touch games. All games were 24 min, but bout durations differed in continuous (1 × 24 min) or repeated (2 × 12, 3 × 8, 4 × 6, 6 × 4, 8 × 3, 12 × 2 or 24 × 1 min) formats. Repeat bouts were interspersed by 2 min of passive rest, and participants were informed of the bout duration immediately prior to the game. Heart rates, ratings of perceived exertion and data gathered from global positioning system devices were used to investigate the pacing strategies employed within each game. No significant (P > 0.05) between-game differences were observed in total distance; however, during the 1-min bouts, high-speed movement was significantly (P < 0.05) increased, during the first and second quarters of the 24 × 1-min game compared to all other formats (effect size range: 0.75 ± 0.61–1.38 ± 0.47). Furthermore, the rate of decline in high-speed movement over-time was greatest during the 24 × 1-min game with large differences observed between the first and third quarters (effect size: 0.90 ± 0.58). Greater moderate-speed (effect size range: 0.62 ± 0.63–1.56 ± 0.40) and less low-speed (effect size range: 0.69 ± 0.62–1.54 ± 0.40) distances were also observed during the 1-min bouts, yet heart rates were higher during the continuous 1 × 24-min game. Pacing strategies during intermittent activities are influenced by the number and duration of exercise bouts. Practitioners should consider within-game bout durations when prescribing game-based activities to improve aerobic capacity.  相似文献   

Cytotoxicity and effect of extraction methods on the chemical composition of essential oils of Moringa oleifera seeds     

Rowland Monday Ojo Kayode  Anthony Jide Afolayan 《Journal of Zhejiang University. Science. B》2015,16(8):680-689

Renewed interest in natural materials as food flavors and preservatives has led to the search for suitable essential oils. Moringa oleifera seed essential oil was extracted by solvent-free microwave and hydrodistillation. This study assessed its chemical constituents. Cytotoxicity of the oils was investigated using hatchability and lethality tests on brine shrimps. A total of 16 and 26 compounds were isolated from the hydrodistillation extraction (HDE) and solvent-free microwave extraction (SME) oils, respectively, which accounted for 97.515% and 97.816% of total identifiable constituents, respectively. At 24 h when the most eggs had hatched, values of the SME (56.7%) and HDE (60.0%) oils were significantly different (P<0.05) from those of sea water (63.3%) and chloramphenicol (15.0%). Larva lethality was different significantly (P<0.05) between HDE and SME oils at different concentrations and incubation periods. The median lethal concentration (LC₅₀) of the oils was >1000 mg/ml recommended as an index for non-toxicity, which gives the oil advantage over some antioxidant, antimicrobial, therapeutic, and preservative chemicals.  相似文献   

Characterizing instructor gestures in a lecture in a proof-based mathematics class     

Aaron Weinberg  Tim Fukawa-Connelly  Emilie Wiesner 《Educational Studies in Mathematics》2015,90(3):233-258

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Between education and psychology: school staff perspectives     

Tim Corcoran  Dave Finney 《Emotional and Behavioural Difficulties》2015,20(1):98-113

When discussing contributions from psychology in/to educational practices like school-based mental health promotion, it is peculiar that psychologists (of an educational or clinical kind) or education-oriented sociologists, both not often based in schools or classrooms, dominate the topic. It has been acknowledged that school staff have been over looked and underutilised in contributing to the discussion, particularly as this pertains to sharing perspectives on how they experience their role in relationship to education policy and practice. The study presented here looked to address this situation by seeking the perspectives of school staff on a range of concerns situated at the nexus between education and psychology. Contrary to the type of displaced assessment intimated above, this group of school staff generally accepts they perform a crucial task in supporting students, their main concern being to incisively question how they might negotiate existing role-related pressures to better current school-based practice.  相似文献