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Author(s):  
Jitka Annen ◽  
Rajanikant Panda ◽  
Charlotte Martial ◽  
Andrea Piarulli ◽  
Guillaume Nery ◽  
...  

2021 ◽  
Vol 55 (1) ◽  
pp. 1-4
Author(s):  
Ganesh Mani

Everybody has opinions on grand challenges---bold tasks that capture the imagination of researchers and system builders---for AI. One of the earliest set of challenge goals was enunciated by Turing award winner and AAAI President, Raj Reddy, in 1988. I attempt to provide an accounting of the progress that has been made in the field, over the last three decades, towards those challenge goals. While some tasks such as the world-champion chess machine were accomplished in short order, many others remain incomplete. A new set of challenges for the current decade are also proposed, spanning the Health, Wealth and Wisdom spheres. Bridging the gap from narrow AI to general-purpose AI will be required to solve some of these challenges; teaming architectures in the service of humankind will also need to be emphasized. The mantra should be: Of the people, by the people with machines ; for the people!


2021 ◽  
Vol 1 (120) ◽  
pp. 4-12
Author(s):  
Yasuyuki Yoshida ◽  
Arunas Bizokas ◽  
Katusha Demidova ◽  
Shinichi Nakai ◽  
Rie Nakai ◽  
...  

Background. Competitive dance, also known as “DanceSport,” is a competitive style of ballroom dance. The waltz features a particular movement in which the dancer lifts and lowers his/her body while dancing. In ballroom dance terms, this movement is known as the “rise and fall.” The purpose of this research was to examine partnering effects in relation to the vertical component of dancers’ center of mass when performing the competitive waltz. Methods. This investigation was conducted through statistical parametric mapping of the movements of 13 national level competitive dance couples and a world champion couple as they danced both solo and in pairs. The Xsens MVN system was used to record their movements, using a capture rate of 240 Hz. Results. We consequently found that, in the pair condition, the vertical component of the center of mass was smaller for the male dancers and larger for the champion male dancer when compared to their respective solo conditions. However, for the female dancers and the champion female dancer, unlike the males, no significant partner effects were found. Conclusion. Therefore, in terms of partner effects, the “rise and fall.” motion was smaller for the male dancers and larger for the champion male dancer. Keywords: DanceSport, ballroom, kinematics, partnering, statistical parametric mapping.


Author(s):  
Cai Li ◽  
Rosemond Atampokah ◽  
Helena Akolpoka ◽  
Priscilla Avonie ◽  
Baku R. Kwame

Development across the globe has been an agenda many citizens of the world champion irrespective of the area, sector or discipline within which it is being advocated. Politically, socially, and in the world of economics, mutual fund has gained significance within country’s economic environment. The phenomenal growth in the financial market of mutual funds can be attributed to the increase in the various financial schemes available, improvement in fund mobilization, as well as the growth of investments in the country. We examined the impact of macroeconomic variables on mutual fund performance of all mutual fund companies in Ghana over the period of 2008 to 2016. We performed correlation analysis, hence examined the co-movement of the returns from the selected funds with the key macroeconomic variables. We find macroeconomics variables positively affect the returns of funds. The effect comes by the amount of money available for investments. We further find exchange rate as the strongest macroeconomic variable affects the performance of mutual funds in Ghana. We established that Ghana receives a significant amount of foreign portfolio investment (FPI), where investors in other countries bring in their money to make investment on our financial markets. Our results provide evidence for fund managers on approach in dealing with macroeconomic conditions and its volatilities.


Author(s):  
Leonardo Rossi ◽  
Mark H. M. Winands ◽  
Christoph Butenweg

AbstractMonte Carlo Tree Search (MCTS) is a search technique that in the last decade emerged as a major breakthrough for Artificial Intelligence applications regarding board- and video-games. In 2016, AlphaGo, an MCTS-based software agent, outperformed the human world champion of the board game Go. This game was for long considered almost infeasible for machines, due to its immense search space and the need for a long-term strategy. Since this historical success, MCTS is considered as an effective new approach for many other scientific and technical problems. Interestingly, civil structural engineering, as a discipline, offers many tasks whose solution may benefit from intelligent search and in particular from adopting MCTS as a search tool. In this work, we show how MCTS can be adapted to search for suitable solutions of a structural engineering design problem. The problem consists of choosing the load-bearing elements in a reference reinforced concrete structure, so to achieve a set of specific dynamic characteristics. In the paper, we report the results obtained by applying both a plain and a hybrid version of single-agent MCTS. The hybrid approach consists of an integration of both MCTS and classic Genetic Algorithm (GA), the latter also serving as a term of comparison for the results. The study’s outcomes may open new perspectives for the adoption of MCTS as a design tool for civil engineers.


Author(s):  
Alexander Patrician ◽  
Christopher Gasho ◽  
Boris Spajić ◽  
Hannah G. Caldwell ◽  
Darija Bakovic-Kramaric ◽  
...  

In this case study, we evaluate the unique physiological profiles of two world-champion breath-hold divers. At close-to current world record depths, the extreme physiological responses to both exercise and asphyxia during progressive elevations in hydrostatic pressure are profound. As such, these professional athletes must be highly capable of managing such stress, to maintain performing at the forefront human capacity. In both divers, pulmonary function before and after deep dives to 102 and 117 meters in the open sea were assessed using non-invasive pulmonary gas exchange (indexed via the O2 deficit, which is analogous to the traditional alveolar to arterial oxygen difference), ultrasound B-line scores, airway resistance and airway reactance. Hydrostatic-induced lung compression was also quantified via spirometry. Both divers successfully performed their dives. Pulmonary gas exchange efficiency was impaired in both divers at 10 min, but had mostly restored within a few hours. Mild hemoptysis was transiently evident immediately following the 117m dive, whereas both divers experienced nitrogen narcosis. Although B-lines were only elevated in one diver post-dive, reductions in airway resistance and reactance occurred in both divers, suggesting the compressive strain on the structural characteristics of the airways can persist for up to 3.5hrs. Marked echocardiographic dyssynchrony was evident in one diver after 10m of descent, which persisted until resolving at ~77m during ascent. In summary, despite the enormous hydrostatic and physiological stress to diving beyond 100m on a single breath, these data provide valuable insight into the extraordinary capacity of those at the pinnacle of apneic performance.


2021 ◽  
Author(s):  
Jitka Annen ◽  
Rajanikant Panda ◽  
Charlotte Martial ◽  
Andrea Piarulli ◽  
Guillaume Nery ◽  
...  

Abstract Voluntary apnea showcases extreme human adaptability in trained individuals like professional free divers. We evaluated the physiological and psychological adaptation and the functional cerebral changes using EEG and fMRI to 6.5 minutes of dry static apnea performed by a world champion free diver. Compared to resting state at baseline, apnea was characterized by increased EEG power and functional connectivity in the alpha band, along with decreased delta band connectivity. fMRI connectivity was increased within the DMN and visual areas but decreased in pre- and postcentral cortices. While these changes occurred in regions overlapping with cerebral signatures of several meditation practices, they also display some unique features that suggest an altered somatosensory integration. As suggested by the self-reported phenomenology, these findings could reflect the ability of elite free divers to create a (functional) dissociation between the body and the mind when performing prolonged apnea.


Author(s):  
James C. Morehen ◽  
Carl Langan-Evans ◽  
Elliot C.R. Hall ◽  
Graeme L. Close ◽  
James P. Morton

Weight cycling is thought to increase the risk of obesity and cardiometabolic disease in nonathletic and athletic populations. However, the magnitude and frequency of weight cycling is not well characterized in elite athletes. To this end, we quantified the weight cycling practices of a male World Champion professional boxer competing at super middleweight (76.2 kg). Over a 5-year period comprising 11 contests, we assessed changes in body mass (n = 8 contests) and body composition (n = 6 contests) during the training camp preceding each contest. Time taken to make weight was 11 ± 4 weeks (range: 4–16). Absolute and relative weight loss for each contest was 12.4 ± 2.1 kg (range: 9.8–17.0) and 13.9% ± 2.0% (range: 11.3–18.2), respectively. Notably, the athlete commenced each training camp with progressive increases in fat mass (i.e., 12.5 and 16.1 kg for Contests 1 and 11) and reductions in fat-free mass (i.e., 69.8 and 67.5 kg for Contests 1 and 11, respectively). Data suggest that weight cycling may lead to “fat overshooting” and further weight gain in later life. Larger scale studies are now required to characterize the weight cycling practices of elite athletes and robustly assess future cardiometabolic disease risk. From an ethical perspective, practitioners should be aware of the potential health consequences associated with weight cycling.


2020 ◽  
pp. 101269022097971
Author(s):  
Cathy van Ingen

This article presents a biographical narrative of Christy Martin, a former world champion boxer who survived being stabbed and shot by her trainer/husband. Rooted in a sociological imagination, this biographic research chronicles Martin’s boxing career and its entanglements with gender-based violence. The boxing industry has a widely acknowledged, yet under-reported, problem with men’s violence against women. This article aims to illustrate that women’s boxing should be critically examined for the ways in which it functions both as a site of and a sanctuary from gender-based violence. Within this paper, I draw from media coverage of Christy Martin’s boxing career, over 700 pages of transcripts from the subsequent criminal trial, an interview with Martin, as well as my own research in women’s boxing, including work with survivors of domestic violence.


2020 ◽  
Vol 24 (4) ◽  
pp. 168-174
Author(s):  
Yasuyuki Yoshida ◽  
Arunas Bizokas ◽  
Katusha Demidova ◽  
Shinichi Nakai ◽  
Rie Nakai ◽  
...  

Competitive dance, also known as DanceSport, is one of the official sports of the World Games. The most salient characteristic of ballroom dance is the closed-hold position, during which the upper body segments of partner-dancers are linked. This study aimed to investigate partnering effects on joint motion ranges of the lower extremity and step lengths during the waltz in 13 national level competitive dance couples and a world champion couple. A Xsens MVN system was used to record movement at 240 Hz. Solo and pair conditions were examined. Compared with the highly skilled couples, the world champion couple demonstrated superior dance skills for generating the first step length in the pair condition of the waltz. This was particularly evident in the step length and joint motion range of the champion female dancer.


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