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( Matthew Sharp ),( Jacob Wilson ),( Matthew Stefan ),( Raad Gheith ),( Ryan Lowery ),( Charlie Ottinger ),( Dallen Reber ),( Cemal Orhan ),( Nurhan Sahin ),( Mehmet Tuzcu ),( Shane Durkee ),( Zainula 한국운동영양학회 2021 Physical Activity and Nutrition (Phys Act Nutr) Vol.25 No.1
[Purpose] This study investigated the effects of marine phytoplankton supplementation (Oceanix®, Tetraselmis chuii ) on 1) maximal isometric strength and immune function in healthy humans following a one-week high-intensity resistance-training program and 2) the proinflammatory cytokine response to exercise in a rat model. [Methods] In the human trial, 22 healthy male and female participants were randomly divided into marine phytoplankton and placebo groups. Following baseline testing, participants underwent a 14-day supplement loading phase before completing five consecutive days of intense resistance training. In the rat model, rats were randomly divided into four groups (n=7 per condition): (i) control, (ii) exercise, (iii) exercise + marine phytoplankton (2.55 mg/kg/day), or (iv) exercise + marine phytoplankton (5.1 mg/kg/day). Rats in the exercising groups performed treadmill exercise 5 days per week for 6 weeks. [Results] In the human model, marine phytoplankton prevented significant declines in the isometric peak rate of force development compared to placebo. Additionally, salivary immunoglobulin A concentration was significantly lower following the resistance training protocol in the placebo group but not in the marine phytoplankton group. Marine phytoplankton in exercising rats decreased intramuscular levels and serum concentrations of tumor necrosis factor-alpha (TNF-α) and interleukin-1 beta (IL-1β) and intramuscular concentrations of malondialdehyde. [Conclusion] Marine phytoplankton prevented decrements in indices of functional exercise recovery and immune function. Mechanistically, these outcomes could be prompted by modulating the oxidative stress and proinflammatory cytokine response to exercise.
Stirling Sharpe 글로벌지식마케팅경영학회 2018 Journal of Global Sport Management Vol. No.
The increasing commercialism of sport has been accompanied by pressure for sport organizations to become (more) professional. The kitchen table or boardroom approaches that may be ingrained in accepted values within organizations are being challenged by contemporary business principles of sport organization governance. While considerable work has been conducted under the banner of the professionalization of sport, there has been limited research addressing the ongoing professionalization of organizations which have already moved away from being volunteer based and are operating in a business-like manner. This research provides a case study of the ACT Brumbies rugby union club in Australia addressing this issue with interviews conducted within three key stakeholder groups of this organization: Board members, operations staff, and players. Semi-structured interviews were conducted with a purposive sample of twelve stakeholders. Results indicated that the ongoing professionalization process had differing impacts on operations for various employees.
Neural network-based build time estimation for additive manufacturing: a performance comparison
Oh Yosep,Sharp Michael,Sprock Timothy,권순조 한국CDE학회 2021 Journal of computational design and engineering Vol.8 No.5
Additive manufacturing (AM) has brought positive opportunities with phenomenal changes to traditional manufacturing. Consistent efforts and novel studies into AM use have resolved critical issues in manufacturing and broadened technical boundaries. Build time estimation is one of the critical issues in AM that still needs attention. Accurate build time estimation is key for feasibility studies, preliminary design, and process/production planning. Recent studies have provided the possibility of neural network (NN)-based build time estimation. In particular, traditional artificial NN (ANN)- and convolutional NN (CNN)-based methods have been demonstrated. However, very little has been done on the performance comparison for build time estimation among the different types of NNs. This study is aimed at filling this gap by designing various NNs for build time estimation and comparing them. Two types of features are prepared as inputs for the NNs by processing three-dimensional (3D) models: (1) representative features (RFs) including dimensions, part volume, and support volume; and (2) the set of voxels generated from designating the cells occupied by the workpiece in a mesh grid. With the combination of NN types and input feature types, we design three NNs: (1) ANN with RFs; (2) ANN with voxels; and (3) CNN with voxels. To obtain large enough label data for reliable training, we consider simulation build time from commercial slicing applications rather than actual build time. The simulation build time is calculated based on a material extrusion process. To address various cases for input models, two design factors (scale and rotation) are considered by controlling the size and build orientation of 3D models. In computational experiments, we reveal that the CNN-based estimation is often more accurate than others. Furthermore, the design factors affect the performance of build time estimation. In particular, the CNN-based estimation is strongly influenced by changing the size of 3D models.
스포츠교육학 : 체육 및 스포츠 교육에서 연속적 행동분석의 방법과 적용
( So Ho-sung ),( Tom Sharpe ) 한국체육학회 2000 한국체육학회지 Vol.39 No.2
본 연구의 목적은 교사 및 코우치 양성 교육과정에서 이루어지는 피드백 및 목표설정과 관련된 제반 문제를 연구하기 위한 유망한 방법을 제시하는데 있다. 행동분석 관련 문헌에서 '연속적 행동분석'이라 명명되는 이 연구방법은, 본 연구에서 체육 및 교육분야에서 주로 사용되어 온 전통적 형태의 체계적 관찰방법과 비교·분석되었다. 아울러, 연속적 행동분석 방법이 교사 및 코우치 양성교육에 대한 연구분야에 효과적인 대안적 방법으로 채택될 수 있다는 전제하에 다양한 향후 연구 방향이 제시되고 있다. 마지막으로, 효과적인 교사 및 코우치 양성 교육과정에서 간과되어 온 문제를 규명하고, 대안적 측면으로 기대되어지는 본 연구 방법의 독특한 강점이 요약되어 있다. This article summarizes an appealing method for the study of teaching and coaching practice, and for the feedback and goal-setting experiences that take place in practice teaching and coaching certification settings. Termed sequential behavior analysis (SBA) and founded in the behavior analysis literature, methodological illustrations from education are provided in the context of comparisons with more traditional forms of systematic observation which have frequented the physical education and larger education literatures. Recommended future directions are also provided with respect to teacher and coach training and with respect to research and development applications in the hope of guiding the profession toward the use of alternative SBA-based tools in their scholarly work. The unique appeal of SBA is last smnmarized with emphasis on the need for alternative lenses with which to uncover here-to-fore overlooked characteristics of effective teaching and coaching practice. Emphasis throughout is placed on encouraging greater emphasis on direct observation applications to the science of education.