Статті в журналах: "Return of serve"

1

Sánchez-Alcaraz, Bernardino J., Diego Muñoz, Francisco Pradas, Jesús Ramón-Llin, Jerónimo Cañas, and Alejandro Sánchez-Pay. "Analysis of Serve and Serve-Return Strategies in Elite Male and Female Padel." Applied Sciences 10, no. 19 (September 24, 2020): 6693. http://dx.doi.org/10.3390/app10196693.

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This aim of this study was to analyze serve and return statistics in elite padel players regarding courtside and gender. The sample contained 668 serves and 600 returns of serves from 14 matches (7 male and 7 female) of the 2019 Masters Finals World Padel Tour. Variables pertaining to serve (number, direction, court side and effectiveness), return of serve (direction, height, stroke type and effectiveness) and point outcome were registered through systematic observation. The main results showed that the serving pair had an advantage in rallies, under 8 shots in women and under 12 shots in men. Statistical differences according to gender and court side were found. Female players execute more backhand and cross-court returns and use more lobs than men. On the right court, serves are more frequently aimed at the “T” and more down the line returns are executed when compared to the left side. Such knowledge could be useful to develop appropriate game strategies and to design specific training exercises based on actual competition context.

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Mergheş, Petru Eugen, Beatris Simion, and Adrian Nagel. "Comparative Analysis of Return of Serve as Counter-attack in Modern Tennis." Timisoara Physical Education and Rehabilitation Journal 6, no. 12 (June 1, 2014): 18–22. http://dx.doi.org/10.2478/tperj-2014-0023.

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Abstract High performance modern tennis is characterised by high dynamism, speed in thinking and action, precision and high technical and tactical skills. In this study, we used direct observation and statistical recording of nine matches during two competition years in the tennis players Roger Federer, Rafael Nadal and Andre Agassi. In these tennis players, we studied mainly the return of serve, one of the most important shots in tennis, together with serve, as first shots in a point. We have chosen the three tennis players because they are the best example of return of serve as shown by the matches recorded and interpreted. The study we have carried out shows that return of serve makes Agassi a winner in most matches. The high percentage in Federer’s serves makes his adversaries have a lower percentage in return of serve, which prevents them to win against his serve. High percentage in return of serve results in more points on the adversary’s serve and an opportunity to start the offensive point. After comparing the three tennis players mentioned above, we can see that the highest percentage of points won on return of serve belongs to Agassi, which ranks him among the best return of serve tennis players in the world. The tennis player with the highest percentage in return of service is the one who wins the match, which shows, once again, the importance of the return of serve. Return of serve can be a strong counter-attack weapon if used at its highest level.

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Gillet, Eric, David Leroy, Régis Thouvarecq, and Jean-François Stein. "A Notational Analysis of Elite Tennis Serve and Serve-Return Strategies on Slow Surface." Journal of Strength and Conditioning Research 23, no. 2 (March 2009): 532–39. http://dx.doi.org/10.1519/jsc.0b013e31818efe29.

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Jan Carboch and Petr Smocek. "Serve and Return in Badminton: Gender Differences of Elite Badminton Players." International Journal of Physical Education, Fitness and Sports 9, no. 1 (February 28, 2020): 44–48. http://dx.doi.org/10.34256/ijpefs2014.

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Male and female players may have different game characteristics and performance. The first two shots of a rally in badminton have tactical importance. The aim of this study is to identify players' actions and behaviors and to assess differences in serve and return between the genders on the international level. We observed 15 male and 15 female matches from top international badminton tournaments. A notational analysis was used while observing the serve type, return type and the point winner. Male players hit the backhand short serve in 91 % of points and female players started the point mostly with the forehand long serve (58 %). Both genders won 50 % of the serving points. The distribution of return type is quite equal among the drop, lob, clear, smash and net shots in female matches. While returning a short serve, the lob was 4-5 % less efficient than a net shot in both genders. Women can try to use backhand short serve more often as we found the highest efficiency of all the serve types.

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Rosemond, Zsuzsa. "The Importance of Serve and Return in the Infant Classroom Settings." Képzés és gyakorlat 16, no. 3 (2018): 45–50. http://dx.doi.org/10.17165/tp.2018.3.5.

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Reynolds, Alison M., and Suzanne L. Burton. "Serve and return: Communication foundations for early childhood music policy stakeholders." Arts Education Policy Review 118, no. 3 (December 9, 2016): 140–53. http://dx.doi.org/10.1080/10632913.2016.1244779.

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Hizan, Hazuan, Peter Whipp, Machar Reid, and Jon Wheat. "A comparative analysis of the spatial distributions of the serve return." International Journal of Performance Analysis in Sport 14, no. 3 (December 2014): 884–93. http://dx.doi.org/10.1080/24748668.2014.11868765.

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Hizan, H., P. Whipp, and M. Reid. "Post-match recall of serve and serve-return patterns in high-performance junior male and female tennis players." Journal of Fundamental and Applied Sciences 9, no. 6S (February 1, 2018): 468. http://dx.doi.org/10.4314/jfas.v9i6s.36.

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9

Cao, Yang. "MULTIPLE SERVER PREEMPTIVE SCHEDULING WITH IMPATIENCE." Probability in the Engineering and Informational Sciences 31, no. 2 (May 31, 2016): 226–38. http://dx.doi.org/10.1017/s0269964816000176.

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There are n customers that need to be served by m parallel servers (n≥m). Customer i will only wait in queue for an exponentially distributed time with rate λi before departing the system. The service time on server j is exponentially distributed with rate μj for all customers, and upon completion of service of customer i a positive reward ri is earned. The non-preemptive problem is to choose, after each service completion, which currently in queue customer to serve next. The preemptive problem is to decide when to preempt a service, and to choose, after each service completion or preemption, which currently in queue customer to serve next. The objective of both problems is to maximize the expected total return. We give conditions under which a list policy is optimal for both problems.

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10

Hizan, Hazuan, Peter Whipp, and Machar Reid. "Comparison of serve and serve return statistics of high performance male and female tennis players from different age-groups." International Journal of Performance Analysis in Sport 11, no. 2 (August 2011): 365–75. http://dx.doi.org/10.1080/24748668.2011.11868556.

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11

Martínez-Gallego, Rafael, and Arnau Giner. "Characteristics of the return in professional women’s tennis on clay courts." ITF Coaching & Sport Science Review 27, no. 78 (August 31, 2019): 8–11. http://dx.doi.org/10.52383/itfcoaching.v27i78.86.

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The number of studies related to notational analysis of the serve has grown in recent years, and this latest research has suggested that: players win more with the serve at younger age groups; with males, there is more variation in direction and more points are won on the forehand than the backhand return; and, women return closer to the net with a flatter trajectory than male counterparts. Despite advances in research there is still little on female tennis, especially on clay courts. In this study, 795 points of female matches at the BBVA Open Valencia 2017 ITF event were analysed. On the first serve, on the left, players use mainly backhands and hit crosscourt, whereas on the right, there were no significant differences in forehands and backhands hit, and there was more variation in direction. On the second serve, on the left, players still mainly used backhands but hit more shots down the line; whereas on the right, players hit mainly inside-out forehands and there were no differences in the direction hit.

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Krause, Lyndon Mark, Tim Buszard, Machar Reid, Ross Pinder, and Damian Farrow. "Assessment of elite junior tennis serve and return practice: A cross-sectional observation." Journal of Sports Sciences 37, no. 24 (September 18, 2019): 2818–25. http://dx.doi.org/10.1080/02640414.2019.1665245.

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13

SAITO, Kei, Katsutoshi MASAI, Toshitaka KIMURA, and Maki SUGIMOTO. "Cognitive and motor Analysis of the Tennis Serve Return Expertise under Virtual Environment." Proceedings of the Symposium on sports and human dynamics 2019 (2019): C—16. http://dx.doi.org/10.1299/jsmeshd.2019.c-16.

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14

Klaus, Anne, Ryan Bradshaw, Warren Young, Brendan O’Brien, and James Zois. "Success in national level junior tennis: Tactical perspectives." International Journal of Sports Science & Coaching 12, no. 5 (September 7, 2017): 618–22. http://dx.doi.org/10.1177/1747954117727792.

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Purpose Point duration in competitive tennis is becoming shorter, highlighting a greater emphasis on performance of the first strokes of each point, in particular, the performance of the server. Methods Descriptive measures of the video-based analysis included stroke type, point outcome and stroke position of the first two strokes of the server (service and first shot) during 10 randomly selected sets of competition on hard court. All participants (male; n = 8) were of the age group 14 years and below and competed in national level events. Results The performance of the first serve is characterized by an “in-percentage” of 54.6% and an improved chance of winning the point (for the server) following a first serve (55.9%; P < 0.001) compared to a second serve (42.9%). The majority of stroke positions for first-shot winners were located in the central zone of the court (52.1%; P < 0.01). In comparison to the error rate of all examined strokes, we observed an increased error rate of the first shot (16.5% vs. 22.4%; P < 0.01). Conclusion Contrasting to professionals, juniors produce more first-serve errors and win fewer points directly via the serve. Success in junior tennis relies in minimizing errors within short rallies specifically on the first shot of the server. Coaches of national level junior tennis players should focus on strategies to optimize court position following the serve and service percentage to increase competitive success rate. To achieve this, the server should utilize the serve as a “set-up” tool, dictating the direction of the returner’s return of serve within the central zones of the court.

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Mitzner, Piotr. "The Return of the „Red Donkey Jacket”." Tekstualia 1, no. 48 (July 20, 2017): 173–77. http://dx.doi.org/10.5604/01.3001.0013.3096.

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The article is devoted to Polish wartime poetry (1939–1945) and its later reception. The term „the third avant-guard” has been used to indicate a singular tendency. Its representatives, who disapproved of banality and stereotypes, themselves wrote texts based on stereotypes. These texts became subject to manipulation in the post-war period so as to serve ideological purposes. The article also examines the category of the patriotic song and a connection between text and music in this form.

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Filipcic, Ales, Bojan Leskosek, and Tjasa Filipcic. "Split-Step Timing of Professional and Junior Tennis Players." Journal of Human Kinetics 55, no. 1 (January 1, 2017): 97–105. http://dx.doi.org/10.1515/hukin-2017-0009.

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AbstractThe purpose of the study was to determine the timing of a split-step in three categories of tennis players in four groups of strokes. Subjects were divided into three groups: male and female junior, and male professional tennis players. During two tournaments, all matches were recorded with two fixed video cameras. For every stroke, the timing of the split-step between the opponent’s impact point when hitting the ball and the player’s split-step was measured. A two-way analysis of variance (ANOVA) was used to determine the differences between groups of strokes, players and the interaction Player x Stroke Group. A Tukey post-hoc test was employed to determine specific differences. The results revealed differences between players in detecting the opponent’s movement, stroke and ball flight, which were reflected in different split-step timings. Each tennis player has his/her own timing mechanism which they adapt to various game situations. Response times differ significantly depending on the game situation. On average, they are the lowest in the serve, and then gradually rise from the return of the serve to baseline game, reaching the highest values in specific game situations. Players react faster in the first serve than in the second one and in the return of the serve, the response times are lower after the return of the second serve

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Accordino, Michael P., Connie McReynolds, Denise B. Accordino, and Christine Bard. "Professionals with Psychiatric Disabilities Served in Private Disability Rehabilitation: Implications for Rehabilitation Counselor Preparation." Journal of Applied Rehabilitation Counseling 40, no. 2 (June 1, 2009): 22–27. http://dx.doi.org/10.1891/0047-2220.40.2.22.

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Minimal research is available regarding employment retention and return to work for professionals with psychiatric disabilities in the private disability rehabilitation sector. This article describes return to work barriers faced by professionals with psychiatric disabilities, and it provides recommendations to prepare rehabilitation counselors at the preservice level to better serve professionals with psychiatric disabilities.

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Stivers, Chris, and Licheng Sun. "Cross-Sectional Return Dispersion and Time Variation in Value and Momentum Premiums." Journal of Financial and Quantitative Analysis 45, no. 4 (July 2, 2010): 987–1014. http://dx.doi.org/10.1017/s0022109010000384.

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AbstractWe find that the market’s recent cross-sectional dispersion in stock returns is positively related to the subsequent value book-to-market premium and negatively related to the subsequent momentum premium. The partial relation between return dispersion (RD) and the subsequent value and momentum premiums remains strong when controlling for macroeconomic state variables suggested by the literature. Our findings are consistent with recent theoretical insights and empirical evidence that suggest that the market’s RD may serve as a leading countercyclical state variable, that the value premium is countercyclical, and that the momentum premium is procyclical.

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Goulet, Claude, Chantai Bard, and Michelle Fleury. "Expertise Differences in Preparing to Return a Tennis Serve: A Visual Information Processing Approach." Journal of Sport and Exercise Psychology 11, no. 4 (December 1989): 382–98. http://dx.doi.org/10.1123/jsep.11.4.382.

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Two experiments were conducted to analyze the performance of expert and novice tennis players. For testing purposes, 16-mm films were used. Subjects in both studies had to identify the type of serve presented (flat, top-spin, sliced). In Experiment 1, visual search patterns were investigated. During the ritual phase, experts focus on the shoulder/trunk areas whereas novices concentrate their search around the head of the server. During the execution phase, experts concentrate on the racquet whereas novices use more cues. Using the technique of temporal visual occlusion, the speed and accuracy of decisional processes were investigated in a second study. Results showed that expert players select valuable information during the preparatory phase and during the first part of. the execution phase. Novices must see the ritual phase until ball/racquet impact to be as accurate. Results emphasize the importance of combining sampling of eye movement and behavior parameters to sharpen our understanding of the perceptual processes underlying motor sport performance.

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Schorsch, Jonathan. "The Return of the Tribe." Common Knowledge 27, no. 1 (January 1, 2021): 40–85. http://dx.doi.org/10.1215/0961754x-8723035.

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As a part of “Xenophilia: A Symposium on Xenophobia’s Contrary” in Common Knowledge, this essay examines the interest in, affection for, friendship with, and romanticization of Native Americans by Jews in the United States since the 1960s. The affinity is frequent among Jews with “progressive” or “countercultural” inclinations, especially those with strong environmental concerns and those interested in new forms of community and spirituality. For such Jews, Native Americans serve as mirror, prod, role model, projection, and fictive kin. They are regarded as having a holistic and integrated culture and religiosity, an unbroken connection to premodern attitudes and practices, an intimate relationship with the earth and with nonhuman creatures, along with positive feelings toward their own traditions and a simple, honest, and direct way of living. All of these presumed characteristics offer to progressive Jews parallels and contrasts to contemporary Jewishness and Judaism. For some, Native America has become a path back to a reconstructed Jewishness and Judaism; for others, a path away. Each path is assessed in this article with respect to questions of authenticity, psychobiography, family history, theology, and theopolitics.

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Davide, Luini, Michael Fuchs, Zoran Đokic, Lanzoni Malagoli, and Goran Munivrana. "Comparasion between European elite senior and junior female table tennis players: Rally length and serve-receive game." TIMS. Acta 15, no. 1 (2021): 5–15. http://dx.doi.org/10.5937/timsact15-32605.

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The aim of the study was to compare elite junior and senior women table tennis players, using three parameters of the table tennis: rally length, serve and receive analysis. Twenty-five junior and twenty-five elite senior matches were analysed (total: 263 sets and 4958 points) between players ranked in Top 25 in ETTU rankings in the last two years. All the athletes used an offensive style of play. The results of non-parametric Mann-Whitney U Test, showed a significantly higher rally length in senior compared to junior category (4.46 vs. 3.93). Moreover, the results of Pearson's Chi-square tests show an association between the age categories and selected parameters (laterality, technique and placement) for both serve and receive. Different behavior between the two categories was noted. The senior players used more the flip technique (22.2 % vs 14.7 %) and short push to return the services of the opponents (32.5 % vs 26.0 %). These results provide useful information to analyze junior players' behavior compared to the senior players in order to plan specific training sessions. It can be also useful to identify some parameters as predictors of the future success for junior players.

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Knoppers, Bartha Maria, and Amy Dam. "Return of Results: Towards a Lexicon?" Journal of Law, Medicine & Ethics 39, no. 4 (2011): 577–82. http://dx.doi.org/10.1111/j.1748-720x.2011.00624.x.

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The last few years have witnessed the growth of large-scale, population genomics biobanks, which serve as longitudinal, gene-environment databases for future yet unspecified research. An international consortium, the Public Population Project in Genomics (P3G), builds harmonization tools for such biobanks and has catalogued numerous studies — at least 139 with over 10,000 banked participants and 34 with over 100,000. As their potential use for translational, clinical research draws near, it is opportune to clarify the duties of such biobanks to communicate results to participants. To identify the potential obligations, some demystification of the terminology surrounding the return of results as found in international and national norms on biobanking generally is essential. On the whole, our proposed lexicon is based on a study of norms as found in national and international policies but excludes debates found in the literature.

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Wang, Zhikun, Abdeslam Boularias, Katharina Mülling, and Jan Peters. "Modeling Opponent Actions for Table-Tennis Playing Robot." Proceedings of the AAAI Conference on Artificial Intelligence 25, no. 1 (August 4, 2011): 1828–29. http://dx.doi.org/10.1609/aaai.v25i1.8051.

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Opponent modeling is a critical mechanism in repeated games. It allows a player to adapt its strategy in order to better respond to the presumed preferences of its opponents. We introduce a modeling technique that adaptively balances safety and exploitability. The opponent's strategy is modeled with a set of possible strategies that contains the actual one with high probability. The algorithm is safe as the expected payoff is above the minimax payoff with high probability, and can exploit the opponent's preferences when sufficient observations are obtained. We apply the algorithm to a robot table-tennis setting where the robot player learns to prepare to return a served ball. By modeling the human players, the robot chooses a forehand, backhand or middle preparation pose before they serve. The learned strategies can exploit the opponent's preferences, leading to a higher rate of successful returns.

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Gnap, Michał. "Problems Related to the Capital Assets Pricing Model on the Warsaw Stock Exchange: Applications of the 5-Factor Fama and French Model." Studia i Materiały Wydziału Zarządzania UW 2022, no. 1(36) (2022): 4–14. http://dx.doi.org/10.7172/1733-9758.2022.36.1.

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This paper represents an attempt at empirically assessing the applicability of the Fama and French five-factor model in explaining the cross-sectional variation of stock return for the Polish market. Consistent with Fama and French results, this research shows that value, profitability and investment risk factors play an important role in assessing the expected return of an asset. Many researchers have since sought to identify alternative asset pricing models that could serve as the benchmark empirical asset-pricing model. It is hoped that the analysis conducted in this paper tests whether the revised five-factor model that incorporates the profitability and investment factors can address some of the issues of the three-factor model and could be incorporated in explaining the cross-section of stock returns for Poland.

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Gangwani, Mayank, and Dhun Sehrawat. "Covid-19-A Baleful Aftermath for the Stocks of Indian Pharmaceutical Companies." International Journal of Science, Engineering and Management 9, no. 9 (September 13, 2022): 21–31. http://dx.doi.org/10.36647/ijsem/09.09.a004.

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Covid-19 catastrophe has not spared any market across the world due to widespread disruptions in its supply chain operations. In today's world, however, stock markets serve as a catalyst for a country's economic and financial development. But, with the development of Covid-19 infection and widespread lockdown in the majority of countries, its stock market has plummeted even further into the depths. Therefore, to determine whether the Covid-19 outbreak has impacted the expected return of Nifty Pharma and stock return of 3 leading pharmaceutical companies Cipla, Dr. Reddy's, and Sun Pharma in the before-Covid-19 period (1 Jan 2019 to 20 Mar 2020) and the after-Covid-19 period (23 Mar 2020 to 20 Mar 2021) this study is being carried out. The study aims to uncertain whether there exists a meaningful link between the S&P CNX Nifty index's forecasted market return and the expected security return of Nifty Pharma before and after Covid-19. To evaluate the relevant hypotheses, descriptive statistics event study technique, non-parametric testing, particularly the Wilcoxon Signed test, and regression analysis were used. It was discovered that the expected returns of Nifty Pharma and the expected security returns of Cipla, Dr. Reddy's, and Sun Pharma did not vary significantly before and throughout the Covid-19 epidemic period. However, for both before and throughout the Covid-19 era, there was a link between the predicted market return of the S&P CNX Nifty index and the security return of Nifty Pharma, implying that the benchmark index S&P CNX Nifty was influenced by Nifty Pharma's performance.

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Zainan Abidin, A. W., and N. A. S. Ruslan. "Exploring the Importance of Players’ Characteristics and Performance on Serve and Return of Serve in Winning the Women’s Singles Grand Slam Tennis Tournaments." Journal of Physics: Conference Series 1496 (March 2020): 012008. http://dx.doi.org/10.1088/1742-6596/1496/1/012008.

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Wang, Jie. "Comparison of table tennis serve and return characteristics in the London and the Rio Olympics." International Journal of Performance Analysis in Sport 19, no. 5 (July 26, 2019): 683–97. http://dx.doi.org/10.1080/24748668.2019.1647732.

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Elveren, Adem Yavuz, and Gülay Toksöz. "Hidden gender dimensions of the brain drain: the case of Turkey." New Perspectives on Turkey 60 (May 2019): 33–59. http://dx.doi.org/10.1017/npt.2019.3.

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AbstractThis study examines the gender dimension of the brain drain in Turkey, drawing on the results of an online survey to argue that the gender inequality present in sending countries can serve as a push factor in women's decisions to migrate and return or not return. The results indicate that the gender gap in the labor market in Turkey is an important factor in shaping the return intentions of female Turkish professionals and students living abroad. The findings reveal a gender gap in return intentions independent of other main factors, such as age, field of study/occupation, or duration of stay.

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Rubiano-Cruz, J., S. Páez-Moncaleano, C. Chacón-Cardona, and H. Torres-Sánchez. "Equation of lightning return current in tropical zones." Journal of Physics: Conference Series 2135, no. 1 (December 1, 2021): 012007. http://dx.doi.org/10.1088/1742-6596/2135/1/012007.

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Abstract The purpose of this study is to model mathematically the equation of the lightning return current in tropical zones and to validate it with data obtained from direct measurements in Colombia and Brazil. This study is carried out because the lightning return current in tropical zones is greater than in other latitudes of the planet. For this reason, it is very important for different applications in electrical engineering. Nowadays, the Heidler equation is used for the simulation of faults in electrical systems. This equation will serve as a reference to make a comparison between the data of the equation obtained in this article with those from the equation of Heidler.

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KIJEWSKA, AGNIESZKA. "Eriugeny koncepcja powrotu: dzieło natury czy łaski?" Filozofia Chrześcijańska 15 (October 16, 2018): 31–58. http://dx.doi.org/10.14746/fc.2018.15.2.

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This paper tackles upon John Scottus Eriugena’s concept of the return while presenting it against the background of the Neoplatonic teaching about return (epistrophe). The return belongs to the conceptual triad: mone-proodos-epistrophe which used to serve Neoplatonic thinkers to describe the structure of reality and its dependence on the First Cause. In the system of Eriugena who bequeathed that very teaching from the Christian Neoplatonists (Pseudo-Dionysius, Maximus the Confessor, Gregory of Nyssa), we talk about the return on metaphysical and mystical level in addition to the general return (reditus generalis) and the return of the elects (reditus specialis). Eriugena indicates the cyclical processes in the whole nature but at the same time he stresses that the return is caused by divine grace and the very condition of its possibility is the fact of taking fl esh (incarnatio) and taking human nature (inhumanatio) by Jesus Christ.

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Apsite-Berina, Elina, Girts Burgmanis, and Zaiga Krisjane. "RETURN MIGRATION TRENDS IN LATVIA: RE-ATTRACTING THE MAIN HUMAN RESOURCE FOR SUSTAINABLE REGIONAL DEVELOPMENT." ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (June 20, 2019): 16. http://dx.doi.org/10.17770/etr2019vol1.4117.

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This study is devoted to the research of human resources as a main source of sustainable regional development in Latvia. It is focused on two key concepts of human capital and migration. The aim of the study is to explore return migration geographies by looking at young return migrants as a resource and preconditions for sustainable regional development essential to Latvia.Return migration to the regions of Latvia is examined by two main research questions. What are the most recent return migrant characteristics in Latvia? How does return migration of young Latvians translates into regional geographies of return migration?Drawing on most recent available statistical data we elaborate on the return migration trends in Latvia, look at particular geographies of return migrants to the regions of Latvia. Findings show that return migrants are working age accompanied with their offspring’s, majority not married and return from another European country to the capital and other largest cities and surrounding municipalities. Even more, only ethnicity and country of previous residence serve as return migration predictor.

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Bu, Qiang. "Benchmarking mutual fund alpha." American Journal of Business 31, no. 4 (October 3, 2016): 227–39. http://dx.doi.org/10.1108/ajb-01-2016-0001.

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Purpose The standard market models assume that all investors are rational with the same level of risk aversion, whereas investors in the real world are neither rational nor homogeneous. This contrast makes these models inappropriate for evaluating manager skill. The purpose of this paper is to attempt to bridge the gap between model assumption and fund investment practice. Design/methodology/approach This study proposes a series of modified models using the excess return of peer funds to estimate fund alpha. In these models, the market excess return in the standard market models is replaced with the average excess return of bootstrapped funds. In addition, the author examines the reasons for the difference between the modified models and the standard models. Findings The modified models better explain the variation of fund returns, and they exhibit that a considerably higher percentage of funds can earn positive alpha, thus the skill of fund managers is underestimated based on the standard market models. Originality/value The proposed models provide a more reliable method for investors to identify skilled fund managers, and they can also serve as an objective benchmark in evaluating fund performance and in designing manager compensation packages.

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An, Jong-Seong, and Seung-Min Lee. "The Visual Search Strategy of Elite Tennis Player’s Serve Return Task depending on Success and Failure." Korean Journal of Sports Science 29, no. 3 (June 30, 2020): 271–81. http://dx.doi.org/10.35159/kjss.2020.06.29.3.271.

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Xiong, Xiong, Yongqiang Meng, Xiao Li, and Dehua Shen. "Can overnight return really serve as a proxy for firm-specific investor sentiment? Cross-country evidence." Journal of International Financial Markets, Institutions and Money 64 (January 2020): 101173. http://dx.doi.org/10.1016/j.intfin.2019.101173.

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35

McRae, Kirsty A., and Stuart D. R. Galloway. "Carbohydrate-Electrolyte Drink Ingestion and Skill Performance During and After 2 hr of Indoor Tennis Match Play." International Journal of Sport Nutrition and Exercise Metabolism 22, no. 1 (February 2012): 38–46. http://dx.doi.org/10.1123/ijsnem.22.1.38.

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Twenty-two tennis players were individually studied on 2 occasions. They performed a prematch skill test, a 2-hr tennis match against an equally ranked opponent, and a postmatch skill test. A carbohydrate-electrolyte (CHO-E; Lucozade Sport) or flavor-matched placebo-electrolyte (PL) beverage was administered in a double-blind fashion. During the trials, heart-rate and movement intensity were monitored, and the match was recorded for performance analysis. There were no differences in skill-test scores pre- to postmatch or between trials (154 ± 38 pre- and 160 ± 35 postmatch on PL, 155 ± 36 pre- and 165 ± 33 postmatch on CHO-E). CHO-E ingestion elevated blood glucose concentration throughout the match, and participants reported feeling more energetic (general activation) and more tense (high activation) 1 hr into the match than at baseline (p < .05). Participants in the CHO-E trial spent more time in moderate-intensity activity and less time in low-intensity activity than on PL. Performance analysis revealed that CHO-E ingestion increased overall serve success (M ± SD, 68% ± 7% for CHO-E vs. 66% ± 7% for PL; p < .05) and success of first serves (65% ± 9% for CHO-E, 61% ± 7% for PL; p < .01) and serves to the advantage side (70% ± 9% for CHO-E, 66% ± 7% for PL; p < .05). Return success was greater during the second set of the match (p < .05) in the CHO-E trial. Differences in serve and return success were not associated with blood glucose response to CHO or player ability.

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Valika, Taher S., and Kathleen R. Billings. "Return to Normalcy? Principles on Resuming Surgical Services in the COVID-19 Era." OTO Open 4, no. 2 (January 2020): 2473974X2093665. http://dx.doi.org/10.1177/2473974x20936658.

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The rapidly changing health care climate related to coronavirus disease 2019 (COVID-19) has resulted in numerous changes to health care systems and in practices that protect both the public and the workers who serve in hospitals around the country. As a result, these past few months have seen a drastic reduction in outpatient visits and surgical volumes. With phased reopening and appropriate guidance, health care systems are attempting to return to normal. Our institution has had the unique opportunity to already return operations back to full capacity. The experiences and lessons learned are described, and we provide guiding principles to allow for a safe and effective return to patient care.

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Gast, Karen, Rolando Flores, Fadi Aramouni, Lisa Abeles-Allison, and Elizabeth Boyle. "INTERDISCIPLINARY COOPERATIVE EXTENSION SERVICE EFFORTS FOR VALUE-ADDED INDUSTRIES IN KANSAS." HortScience 27, no. 6 (June 1992): 673g—673. http://dx.doi.org/10.21273/hortsci.27.6.673g.

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Value-added is the transformation of a raw product, usually an agricultural product, into a product that serves consumer demand better. The value-added product usually has an increased value and a higher return than the raw product. Kansas is one of the lowest ranking midwestern states for the number of value-added industries, although it is one of the greatest producers of raw agricultural products. An interdisciplinary team of Extension Specialists was created to promote and to serve small and medium size value-added businesses in the state. This poster will describe Kansas State University Cooperative Extension's approach to serving this clientele.

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Ramalakshmi, Gudla, and P. Mallikarjuna Rao. "A Novel Metamaterial Inspired 2^nd Iteration Koch Fractal Antenna for Wi-Fi, WLAN, C band and X band Wireless Communications." Journal of Physics: Conference Series 2062, no. 1 (November 1, 2021): 012004. http://dx.doi.org/10.1088/1742-6596/2062/1/012004.

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Abstract The rapid advancements in wireless technology desires compact, miniaturized, multiband and ultra wideband antennas. Fractal antennas have been proved as a source for fulfilling these demands. In this paper a 2nd order Koch fractal antenna of size 29.6 × 35.7mm2 designed on FR4-epoxy substrate material of dielectric constant (ɛr) 4.4 with a height of 1.6mm. This antenna is named as ANTENNA-1. To increase this antenna’s performance a meta material unit cell has been placed on the ground plane to serve multi band applications and is named as ANTENNA-2, which is the proposed antenna in this paper. The simulations have been carried out for both the antennas using ANSYS HFSS tool over the frequency sweep of (1-12GHz). The simulation results of proposed antenna producing 7 frequency bands which serves Wi-Fi, WLAN, C-band, and X band wireless communications. The simulation results like return loss, VSWR values have a good matching with the measured return loss, VSWR results of the fabricated antenna

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Orsolini-Hain, Liana. "Mixed messages: Hospital practices that serve as disincentives for associate degree–prepared nurses to return to school." Nursing Outlook 60, no. 2 (March 2012): 81–90. http://dx.doi.org/10.1016/j.outlook.2011.05.007.

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Wang, Zhikun, Abdeslam Boularias, Katharina Mülling, and Jan Peters. "Balancing Safety and Exploitability in Opponent Modeling." Proceedings of the AAAI Conference on Artificial Intelligence 25, no. 1 (August 4, 2011): 1515–20. http://dx.doi.org/10.1609/aaai.v25i1.7981.

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Opponent modeling is a critical mechanism in repeated games. It allows a player to adapt its strategy in order to better respond to the presumed preferences of his opponents. We introduce a new modeling technique that adaptively balances exploitability and risk reduction. An opponent’s strategy is modeled with a set of possible strategies that contain the actual strategy with a high probability. The algorithm is safe as the expected payoff is above the minimax payoff with a high probability, and can exploit the opponents’ preferences when sufficient observations have been obtained. We apply them to normal-form games and stochastic games with a finite number of stages. The performance of the proposed approach is first demonstrated on repeated rock-paper-scissors games. Subsequently, the approach is evaluated in a human-robot table-tennis setting where the robot player learns to prepare to return a served ball. By modeling the human players, the robot chooses a forehand, backhand or middle preparation pose before they serve. The learned strategies can exploit the opponent’s preferences, leading to a higher rate of successful returns.

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Lee, Su Jin, Jin Wan Cho, and Jae Hyun Lee. "Analysis on the Risk Return Profile of Alternative Assets Under Reference Portfolio Concept." Journal of Derivatives and Quantitative Studies 27, no. 2 (May 31, 2019): 193–209. http://dx.doi.org/10.1108/jdqs-02-2019-b0003.

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This paper provides the methodology of estimating the risk-return relationship of alternative asset investments within the mean-variance framework. While conducting strategic asset allocation, most of the institutional investors do not take into account the risk-return relationship of alternative assets, or use arbitrary policy numbers that do not properly reflect the characteristics of alternative assets. This paper borrows the concept of reference portfolio in developing the methodology of estimating the risk-return relationship of alternative investments. The reference portfolio is the benchmark portfolio used in strategic asset allocation by pension funds. This can serve as the opportunity costs of alternative investments. We use the realized IRR’s from actual investments, and estimate the risk-return characteristics of alternative investments. We find that by properly estimating the mapping relationship between the reference portfolio and alternative asset classes, we can incorporate the risk-return profile of these non-market assets within the mean-variance framework together with the other traditional asset classes.

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Ramli, Dian, and Yusnaini Yusnaini. "Pengaruh Sales Growth, Debt To Equity Ratio, Total Assets Turnover Terhadap Return On Assets Pada Perusahaan Property Dan Real Estate Yang Terdaftar Di Bursa Efek Indonesia 2018-2020." Owner 6, no. 1 (January 10, 2022): 722–34. http://dx.doi.org/10.33395/owner.v6i1.647.

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The purpose of this study was to determine the effect of Sales Growth, Debt to Equity Ratio, Total Assets Turnover to Return on Assets property and real estate sector companies that listed in Indonesia Stock Exchange. The population in this study are supporting property and real estate sub-sector companies listed on Indonesia Stock Exchange from 2018-2020. By using a sampling technique (purposive sampling) gained 49 (forty-nine) companies that will serve as the object of research. The testing method used to see the effect of indenpent variables on the dependent variabel is the data panel regression analyze method. Based on this research stimultaneously the effectiveness of Sales Growth not significantly to Return on Asset but Debt to Equity Ratio, Total Assets Turnover on Return on Assets significantly influence Return on Assets. Partial test shows that the effectiveness of Sales Growth has a positive effect but not significant Return on Assets. Debt to Equity Ratio has a negative and significant on Return on Assets. Total Assets Turnover has a positive and significant.

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43

Williams, Scott. "Troubleshooting in Tennis." ITF Coaching & Sport Science Review 23, no. 67 (December 31, 2015): 3–5. http://dx.doi.org/10.52383/itfcoaching.v23i67.144.

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This article discusses troubleshooting your own game and specifically your serve, and return. The article approaches this subject through the use of the SMARTS system which includes six fundamental skills: Seeing, Movement, Adjusting, Rotation, Transfer and Swing.

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Li, Yuanxin, and Guilin Liu. "Risk Analysis of Marine Environmental Elements Based on Kendall Return Period." Journal of Marine Science and Engineering 8, no. 6 (May 29, 2020): 393. http://dx.doi.org/10.3390/jmse8060393.

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Against the background of global warming and rising sea levels, the threat of typhoon disasters to marine engineering structures has become increasingly serious. Therefore, the research on the design standards of marine environmental elements has become an important topic. In this study, two-dimensional joint distributions of wave height and surge height, surge height and wind speed, and wave height and wind speed were constructed based on the Gumbel–Hougaard (G-H) Copula function according to the data of marine environmental elements under extreme sea conditions from Naozhou observation station in the sea waters of western Guangdong, and the Kendall return period is introduced. The joint return periods, co-occurrence return periods, and Kendall return periods of joint distributions were calculated, along with the latter’s corresponding design values of environmental elements. The results showed that the Kendall return periods and the corresponding design values are between two kinds of traditional return periods. After analysis, the conclusion is that the Kendall return period can reflect the occurrence regularity of marine hydrological events more accurately, and the design values of marine environmental elements calculated under this standard can reasonably lower the investment under the premise of ensuring structural safety. Therefore, the Kendall return period can serve as the new selection for marine engineering design and risk management.

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Valika, Taher S., and Kathleen R. Billings. "Back to the Future: Principles on Resuming Outpatient Services in the COVID-19 Era." Otolaryngology–Head and Neck Surgery 163, no. 4 (June 2, 2020): 705–6. http://dx.doi.org/10.1177/0194599820933597.

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The rapidly changing health care climate related to coronavirus disease 2019 (COVID-19) has resulted in numerous changes to health care systems and in practices that protect both the public and the workers who serve in hospitals around the country. As a result, these past few months have seen a drastic reduction in outpatient visits. With phased reopening and appropriate guidance, health care systems are attempting to return to normal. The experiences and lessons learned are described, and we provide guiding principles to allow for a safe and effective return to outpatient care.

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Huo, Chunhui, Tariq H. Malik, and Xiaorui Wang. "Foreign Independent Directors (FID) on Chinese Firms: The Isomorphism and Conformance-Performance Conflict." SAGE Open 11, no. 3 (July 2021): 215824402110450. http://dx.doi.org/10.1177/21582440211045080.

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The globalization of businesses has induced the globalization of boards, and to conform to this trend in the globalization of boards, Chinese firms have had to hire foreign independent directors (FID) as a counterpart to domestic independent directors (DID). Agency theory suggests that an FID contributes to a firm’s financial performance by monitoring and advising the firm’s management. This article explores whether the FID indeed predicts the financial performance of the firm as output and input. Output financial performance refers to the return on investment, and input performance refers to the attraction of foreign investors to the firm after hiring the FID. The evidence from the top 200 Chinese firms shows that the FID does not affect the firm’s financial performance in terms of ROA (return on assets) or ROI (return on investment). However, the FID positively correlates with foreign investment, suggesting that the FID outperforms the DID in attracting foreign investment. These findings point to an alternative explanation, one of which aligns with institutional theory and isomorphism. Institutional theory explains that FID appointments serve conformance rationality more than they serve technical performance rationality. Instead of financial performance pressure, normative conformance pressure influences Chinese firms to adapt to global norms and standards. Such memetic practices support their search for international legitimacy.

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Jurison, Jaak. "The Role of Risk and Return in Information Technology Outsourcing Decisions." Journal of Information Technology 10, no. 4 (December 1995): 239–47. http://dx.doi.org/10.1177/026839629501000404.

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This paper views information technology (IT) outsourcing decisions as classical make-or-buy decisions. In essence, these decisions consist of finding an acceptable balance between benefits and risks. The principal contribution of this paper is the development of a model that describes the relationship between outsourcing benefits and risks. It draws on work from two streams of research: transaction cost theory and modern financial theory. The model can assist managers in determining whether outsourcing or in sourcing is a better choice for a particular IT function and in evaluating and comparing competing vendor proposals. The model can also serve as a framework for future research in IT governance issues.

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Dalldorf, Peter G., Michael P. Banas, and John D. Marquardt. "Tuberculosis of the Foot: A Case Report." Foot & Ankle International 15, no. 3 (March 1994): 157–61. http://dx.doi.org/10.1177/107110079401500312.

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A case of tuberculosis of the foot that was delayed in diagnosis is presented. Common pitfalls of diagnostic evaluation as well as pathogenesis and recent epidemiologic trends are discussed. It is hoped that such reports will serve to heighten awareness of the return of this mighty pathogen.

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Woldeamanuel, Yohannes W., Bharati M. Sanjanwala, and Robert P. Cowan. "Endogenous glucocorticoids may serve as biomarkers for migraine chronification." Therapeutic Advances in Chronic Disease 11 (January 2020): 204062232093979. http://dx.doi.org/10.1177/2040622320939793.

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Aims: The aims of this study were to: (a) identify differences in serum and cerebrospinal fluid (CSF) glucocorticoids among episodic migraine (EM) and chronic migraine (CM) patients compared with controls; (b) determine longitudinal changes in serum glucocorticoids in CM patients; and (c) determine migraine-related clinical features contributing to glucocorticoid levels. Methods: Serum and CSF levels of cortisol and corticosterone were measured using liquid chromatography-mass spectrometry among adult patients with EM, CM, and controls. Serum and CSF samples were collected from 26 and four participants in each group, respectively. Serum glucocorticoids were measured at a second timepoint after 2 years among 10 of the CM patients, six of whom reverted to EM while four persisted as CM. Receiver operating characteristic (ROC) analysis was made to assess the migraine diagnostic performance of glucocorticoids. Regression analysis was conducted to determine the link between glucocorticoid levels and migraine-related clinical variables. Results: CM patients exhibited significantly elevated serum and CSF levels of cortisol and corticosterone compared with controls and EM patients (age, sex, body mass index adjusted; Kruskal–Wallis p < 0.05). ROC showed area-under-curve of 0.89 to differentiate CM from EM. CM patients with remission had their serum glucocorticoids return to control or near EM levels ( p < 0.05). Persistent CM showed unremitting serum glucocorticoids. Migraine frequency and disability contributed to increased cortisol, while pain self-efficacy predicted lower cortisol levels ( p < 0.005). Conclusion: Endogenous glucocorticoids may be biomarkers for migraine progression and for monitoring treatment response. Improving pain self-efficacy skills may help optimize endogenous glucocorticoid levels, which in turn may prevent migraine attacks.

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Sandford, Scott A. "The Power of Sample Return Missions - Stardust and Hayabusa." Proceedings of the International Astronomical Union 7, S280 (June 2011): 275–87. http://dx.doi.org/10.1017/s174392131102504x.

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AbstractSample return missions offer opportunities to learn things about other objects in our Solar System (and beyond) that cannot be determined by observations using in situ spacecraft. This is largely because the returned samples can be studied in terrestrial laboratories where the analyses are not limited by the constraints - power, mass, time, precision, etc. - imposed by normal spacecraft operations. In addition, the returned samples serve as a scientific resource that is available far into the future; the study of the samples can continue long after the original spacecraft mission is finished. This means the samples can be continually revisited as both our scientific understanding and analytical techniques improve with time.These advantages come with some additional difficulties, however. In particular, sample return missions must deal with the additional difficulties of proximity operations near the objects they are to sample, and they must be capable of successfully making a round trip between the Earth and the sampled object. Such missions therefore need to take special precautions against unique hazards and be designed to successfully complete relatively extended mission durations.Despite these difficulties, several recent missions have managed to successfully complete sample returns from a number of Solar System objects. These include the Stardust mission (samples from Comet 81P/Wild 2), the Hayabusa mission (samples from asteroid 25143 Itokawa), and the Genesis mission (samples of solar wind). This paper will review the advantages and difficulties of sample return missions in general and will summarize some key findings of the recent Stardust and Hayabusa missions.

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