Article
Business, Finance
Joseph Gerakos, Juhani T. Linnainmaa, Adair Morse
Summary: Research shows that actively managed institutional accounts outperformed strategy benchmarks from 2000 to 2012; asset managers' outperformance came from factor exposures; implementing mean-variance efficient portfolios using index and institutional mutual funds would not have led to higher Sharpe ratios.
JOURNAL OF FINANCE
(2021)
Article
Engineering, Electrical & Electronic
Junseo Lee, Jihwan Park, Seokhun Kim, Hanwool Jeong
Summary: This paper presents a SRAM design methodology using Bayesian optimization to minimize power consumption and/or maximize performance. The methodology utilizes sigmoid utility functions and linear regression prediction models, as well as Gaussian process model accumulation for efficient optimization of SRAMs with arbitrary capacity. Simulation results show significant reductions in power and access time compared to designs generated by a commercial compiler.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2023)
Article
Multidisciplinary Sciences
Ingo Sandau, Urs Granacher
Summary: This study aimed to establish a biomechanical model to calculate the optimal force-velocity relationship (FvR) profile and determine its influence on snatch performance. The results showed that snatch performance is maximized at an optimal FvR profile, with higher maximal barbell power output (P-max) and lower vertical barbell threshold velocity (v(thres)) leading to a more force-dominated FvR profile. However, sensitivity analysis revealed that v(thres) and P-max have a greater impact on snatch performance than the optimal FvR profile. Therefore, training protocols should focus on improving P-max and reducing v(thres) to enhance snatch performance.
Article
Computer Science, Artificial Intelligence
Zhuang Yang
Summary: This paper studies the performance of momentum in variance reduced stochastic gradient algorithms and proposes SARAH-M and AdaSARAH-M algorithms. Theoretical and empirical analyses are conducted to validate the effectiveness of momentum in variance reduced stochastic gradient algorithms.
EXPERT SYSTEMS WITH APPLICATIONS
(2024)
Article
Biology
Aryanne Hydeko Fukuoka, Nubia Maria de Oliveira, Catarina N. Matias, Filipe J. Teixeira, Cristina P. Monteiro, Maria J. Valamatos, Joana F. Reis, Ezequiel Moreira Goncalves
Summary: This study compared muscle strength and power indicators in resistance-trained men and found that participants with higher phase angle displayed superior muscle strength of the upper limbs and greater muscle power of the lower limbs. Phase angle showed moderate associations with performance in countermovement jump and bench press, even after controlling for body composition. However, lean soft tissue was found to be the most important predictor of muscle strength and power.
Article
Biology
Heidi D. Horrell, Anika Lindeque, Anthony P. Farrell, Roger S. Seymour, Craig R. White, Kayla M. Kruger, Edward P. Snelling
Summary: This meta-study found that cardiac capillary numerical density and mitochondrial volume density decrease with increasing body mass. The scaling trajectories suggest quantitative matching between the supply and consumption of oxygen in the heart, supporting the economic design at the cellular level. However, the exponent for the maximum external mechanical power of the cardiac tissue decreases at a slower rate, implying a declining external mechanical efficiency of the heart with increasing body mass.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2022)
Article
Geriatrics & Gerontology
Dmitriy Bondarev, Taija Finni, Katja Kokko, Urho M. Kujala, Pauliina Aukee, Vuokko Kovanen, Eija K. Laakkonen, Sarianna Sipila
Summary: The study examined longitudinal changes in physical performance during the menopausal transition, finding declines in muscle strength and power but an increase in walking distance. High levels of physical activity were associated with greater increases in grip strength but greater declines in vertical jumping height among women in perimenopause.
JOURNALS OF GERONTOLOGY SERIES A-BIOLOGICAL SCIENCES AND MEDICAL SCIENCES
(2021)
Article
Computer Science, Artificial Intelligence
Henglin Shi, Wei Peng, Haoyu Chen, Xin Liu, Guoying Zhao
Summary: This paper proposes a method for emotion recognition from body gestures, which improves the effectiveness of emotion recognition through global feature extraction and multiscale modeling.
IEEE INTELLIGENT SYSTEMS
(2022)
Article
Multidisciplinary Sciences
Frederique Dupuis, Gisela Sole, Catherine Mercier, Jean-Sebastien Roy
Summary: This study found that fatigue in the dominant shoulder affects movement in the contralateral upper limb, which may increase the risk of shoulder pain.
Review
Sport Sciences
Julen Fernandez-Landa, Asier Santibanez-Gutierrez, Nikola Todorovic, Valdemar Stajer, Sergej M. Ostojic
Summary: Creatine monohydrate supplementation does not have a significant effect on endurance performance in a trained population.
Article
Sport Sciences
Yi-Chung Lin, Marcus G. Pandy
Summary: This study combined a full-body musculoskeletal model with dynamic optimization theory to predict the biomechanics of maximum-speed sprinting and evaluate the effects of changes in muscle-tendon properties on sprint performance. The results showed that sprint performance was most sensitive to changes in muscle strength and least affected by changes in tendon compliance. Additionally, muscle fascicle length had a greater impact on sprint performance compared to muscle intrinsic maximum shortening velocity.
MEDICINE & SCIENCE IN SPORTS & EXERCISE
(2022)
Article
Sport Sciences
Alexander T. Carswell, Sarah Jackson, Paul Swinton, Thomas J. O'Leary, Jonathan C. Y. Tang, Samuel J. Oliver, Craig Sale, Rachel M. Izard, Neil P. Walsh, William D. Fraser, Julie P. Greeves
Summary: This study found that there are associations between serum vitamin D metabolites and physical performance. 25-hydroxyvitamin D (25(OH)D) is negatively correlated with 2.4-km run time and positively correlated with muscle power, while 1,25-dihydroxyvitamin D (1,25(OH)(2)D) is positively correlated with run time and negatively correlated with strength and muscle power. 24,25-dihydroxyvitamin D (24,25(OH)(2)D) is negatively correlated with run time. The vitamin D metabolites together explain a small portion of variance in physical performance. VDR SNPs are not associated with physical performance.
MEDICINE & SCIENCE IN SPORTS & EXERCISE
(2022)
Article
Multidisciplinary Sciences
Saeed Jamalzadeh, Kash Barker, Andres D. Gonzalez, Sridhar Radhakrishnan
Summary: Disinformation campaigns have significant impacts on vaccination coverage, election results, and supply chains. To address these issues, a hybrid approach combining an epidemiological model of disinformation spread and an optimization model for infrastructure network performance is developed.
SCIENTIFIC REPORTS
(2022)
Article
Multidisciplinary Sciences
Chenglin Liu, Yuan Tian, Longfeng Zhou, Zhulin Tian, Gang Sun, Jun Yin, Zhixiong Zhou
Summary: The study found a moderate correlation between upper limb muscle strength and DP output power, with the shoulder extension strength at 60 degrees/s showing a higher correlation. Multiple regression analysis indicated that shoulder extension strength at 60 degrees/s explained 34% and 40% of the variance in the 30-s and 3-min tests respectively.
SCIENTIFIC REPORTS
(2022)
Article
Physiology
Emily L. McClelland, Peter G. Weyand
Summary: Human running performance is stratified by sex, with larger differences observed in longer distance events. In sprint running, the differences between male and female performance increase with distance, while in longer endurance events, the differences remain relatively constant.
JOURNAL OF APPLIED PHYSIOLOGY
(2022)