Dissertationen: „Player selection“

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Velentza, Elisavet. „A retrospective analysis of talent selection and progression within England's Rugby Football Union Elite Player Performance Pathway“. Thesis, University of Chester, 2017. http://hdl.handle.net/10034/620558.

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The England Rugby Football Union (RFU) Elite Player Performance Pathway (EPPP) is a player development system, structured into five playing squads (Under 18 [U18], Under 20 [U20], National academy [NA, age: 18-23 years], Saxons [Saxon, age: 18+ years] and Senior National Squad [SNS, age: 18+ years]), which attempts to develop players to play within the SNS. Despite its importance however, there is yet to be any scientific appraisal of its efficacy in successfully producing SNS players. Appraising the performances of 396 players enrolled on to the EPPP between 2008 and 2014, the purpose of this programme of research was therefore to investigate the nature of player transition and determine the key features associated with match performance between respective squads of the EPPP. To achieve this, the progression rates to subsequent squads, and the anthropometrical and position-specific technical performance data was quantified in conjunction with individual player progression within the EPPP system. Of the 396 players assessed within the thesis, 121 reached the SNS. Involvement in the EPPP was defined by high rates of de-selection during progression to subsequent squads and this was most apparent within the U18, U20 and NA squads. Analyses revealed the proportion of selected players for higher squads was 48.70%, 37%, 57.10% and 61% for U18-U20, U20-NA, NA-Saxon and Saxon-SNS squads, respectively. Within the SNS (n = 121), only 5.80% experienced a linear development (U18-U20-NA-Saxons-SNS) whereas all other players displayed variability with respect to squad pathway trajectories (NA-SNS 0.82%, Saxon-SNS: 50.4%, U20-Saxon-SNS 4.95%, NA-Saxon-SNS 12.39%, U18-U20-NA SNS:2.57%, U18-U20-Saxon-SNS 3.30%, U20-NA-Saxon-SNS 2.47%, side entries [selection from outside the EPPP system] 17.35%) within the EPPP. Thus, progression within the talent development (TDE) system was typified by variable patterns of sequential selection and de-selection processes throughout U18 to senior squads. The prerequisite level of technical performance indicators (TPI), related to generic and position-specific performance characteristics, and anthropometrical features (body mass and stature) specific to six predefined positional groups (front row [FR], second row [SR], Back row [BR], scrumhalf [SH], inside backs [IB], outside backs [OB]), were examined. The SNS revealed similar TPIs to the Saxon squad in all positional groups, only SNS FR were heavier (p ≤ 0.01; r = 0.18) and taller (p ≤ 0.001; r = 0.25) than Saxons FR. Likewise, the results demonstrate that anthropometrical characteristics consistently differentiated respective squads though, on occasion, there were aspects of TPIs that discriminated youth (U18) adult (U20, NA) and senior (Saxons, SNS) age international squads for the six positional groups within the EPPP. Used in isolation therefore, TPIs might offer benchmarks across the respective squads, however the extent of the observed differences between younger (U18 and U20) and older (NA, Saxons & SNS) squads suggests they could be used in conjunction with coach intuition to improve the objectivity of player selection to future squads. Where the performances of progressed and non-progressed players were considered results revealed that taller and heavier players, competing within a higher number of matches, for an increased period of time, were the most important variables influencing progression or deselection from the programme. Where the match TPIs were considered, there were stochastic differences between groups though it appeared as though selected players typically outperformed the non-selected group albeit by small margins and there were fewer differences between progressed and non-progressed in older age squads. Finally, in players selected to progress and those deselected, there was notable within-group variation in the technical demands. Such variation was typified by overlapping IQRs when groups were compared meaning selected players could perform more, or less, effectively than deselected players in any given match. Clearly, such an issue suggests that the technical performance during competition cannot be used to determine talent in such instances. Collectively, the results provide insight to the key requirements of the EPPP, which could be used to develop future coaching, scouting methods, player TDE systems by providing normative levels of attainment for aspiring players, both enrolled or not, within the elite player developmental system.

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Buckley, David. „Skill capture in first-person shooters“. Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/skill-capture-in-firstperson-shooters(a5a4858b-2b48-44f1-a59b-f7e1928ea7df).html.

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The current models of skill in video games make one of two impositions on players: either to provide an estimate of their own skill, or complete several games before they can be properly assessed. However, in order to experience the most enjoyment and greatest sense of immersion, players need to play against the right difficulty. In order to assign the appropriate difficulty, the player's skill must first be captured accurately and quickly, before the player gets frustrated or bored. Rather than relying on game results that need to be averaged over several games, this thesis proposes predicting a player's skill from their behaviour within the first game. In order to do this, we explore methods for measuring skill in both a multiplayer and single-player game and methods for extracting appropriate information from the player's behaviour. The resulting predictions can then be used to automatically assign an appropriate difficulty to the player. In a multiplayer environment, we first demonstrate that a player's final rank canbe predicted within the first 30 seconds of a game with a correlation of over 0.8.This process is transferred to a single-player first-person shooter, where our modelis shown to assign difficulties comparable to a player's own assessment of theirskill within the first 30 seconds of a campaign. We argue that these methods forcapturing skill in a first-person shooter are transferable to other genres, and havethe potential to improve difficulty selection systems.

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Richter, Roman. „Inovativní přehrávač hudby pro chytré telefony a PC“. Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2021. http://www.nusl.cz/ntk/nusl-445556.

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The goal of this thesis is to create a music player for smartphones as well as PCs that works with local music files in the user's device and which can learn which songs does the user like based on their actions during listening to music. The music player can, among other things, remember which songs were skipped by the user, when was volume turned up, or how many times was a certain song played. Each song has a score that is calculated based on these actions. With a higher score, there is also a higher chance of playing the song in the future. The results of my thesis are two full-featured versions of music player, which are capable of communication with each other to ensure synchronization of song scores. The main benefit of this thesis is an improvement of user experience during listening to music, which is achieved by the application's algorithm for song selection and minimalistic user interface.

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4

Ben, Jeddou Roukaya. „Football Selection Optimization through the Integration of Management Theories, AI and Multi-criteria Decision Making“. Electronic Thesis or Diss., Bourgogne Franche-Comté, 2024. http://www.theses.fr/2024UBFCG009.

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Le travail de recherche décrit dans cette thèse s'inscrit dans le contexte de la gestion d'un club de football professionnel, où l'établissement d'un équilibre humain et financier est essentiel pour assurer la pérennité des organisations sportives. Dans le management du football, les méthodes traditionnelles de sélection des joueurs ont historiquement guidé le processus de prise de décision au niveau des clubs. Ce processus de décision stratégique, souvent subjectif et incertain, peut avoir un impact significatif sur les performances financières, économiques et sportives de l’équipe.Alors que le football évolue vers un sport plus axé sur les données, il est de plus en plus reconnu que les méthodes traditionnelles doivent être complétées par des méthodes scientifiques basées sur l'intelligence artificielle et le recours aux méthodes de prise de décision multi-critères pour optimiser la sélection des joueurs et améliorer les performances tant sportives que financières. Il devient essentiel de rechercher un équilibre optimal entre le rendement sportif et la performance financière afin d'optimiser les résultats d'une entité spécifique: le club de football.À cet égard, l'objectif principal de cette thèse est de proposer un modèle qui combine les techniques de machine learning et les méthodes d’analyse multicritères pour améliorer l'efficacité et l'objectivité du processus de sélection des joueurs de football, tout en tenant compte des considérations financières et managériales. Notre première contribution est de prioriser les critères techniques, physiques, tactiques et comportementaux des joueurs en utilisant les algorithmes Random Forest, Entropy et CRITIC. La seconde contribution est de classer les joueurs selon leurs performances en se basant sur la méthode TOPSIS.Afin de valider ces contributions, nous avons créé un système d'aide à la décision permettant au décideur sportif de suggérer des joueurs en fonction de leurs performances. Notre modèle ne vise pas à remplacer les entraîneurs, mais plutôt à intégrer des évaluations subjectives et objectives pour permettre une compréhension approfondie des facteurs de performance sportive et managériale, améliorant ainsi la précision de la sélection des joueurs. Alors que le football s'oriente vers des approches plus axées sur les données, la combinaison de l'IA et du MCDM peut optimiser davantage les processus de sélection des joueurs, en tirant parti des avantages de l'analyse de données objective et de l'expertise subjective.Les résultats obtenus démontrent l'efficacité de notre approche dans l'amélioration des performances des équipes de football, particulièrement lorsqu'elle est soutenue et assistée par l'intelligence émotionnelle, à savoir la capacité du manager à détecter l'état substantiel du joueur
The research outlined in this thesis falls within the context of professional football club management, where establishing a balance between human and financial aspects is essential for long-term viability of sports organizations. In football management, the traditional methods of player selection have historically guided decision-making processes within clubs. This strategic decision-making process, which is often subjective and uncertain, can have a significant impact on the club's financial, economic and sporting situation.As football is increasingly becoming a data-driven sport, there is a growing recognition that traditional approaches need to be complemented by scientific methods based on artificial intelligenceomenclature{AI}{Artificial Intelligence} and multi-criteria decision makingomenclature{MCDM}{Multi-Criteria Decision Making} approaches to optimize player selection and improve both sporting and financial performance. It is becoming increasingly important to find an optimal balance between sporting success and financial performance to optimize the results of a specific entity: the football club.In this respect, the main purpose of this thesis is to propose a model that combines machine learning techniques with multi-criteria analysis methods to improve the efficiency and objectivity of the football player selection process, while taking into account financial and managerial considerations. Our first contribution is to prioritize the physical, technical, tactical, and behavioral criteria of players using Random Forest, Entropy, and CRITIComenclature{CRITIC}{CRiteria Importance Through Intercriteria Correlation}algorithms. The second contribution is to rank players based on their performance using the TOPSIS method.To validate these contributions, we designed a decision support system that assists the sports decision maker by proposing players in order of performance. Our model does not aim to replace coaches but rather to integrate subjective and objective evaluations to provide a thorough understanding of the factors influencing sporting and managerial performance, thereby improving the accuracy of player selection. As football moves towards more data-oriented approaches, the combination of AI and MCDM can further optimize player selection processes by leveraging the benefits of objective data analysis and subjective expertise.The results obtained show the effectiveness of our approach in improving the performance of football teams, especially when supported and promoted by emotional intelligence, which refers to the manager's ability to recognize the substantial state of the players

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Brettenny, Warren James. „Integer optimisation for the selection of a fantasy league cricket team“. Thesis, Nelson Mandela Metropolitan University, 2010. http://hdl.handle.net/10948/1230.

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Sports fans often scrutinise the team selection strategies employed by their favourite team's coach or selection panel. Many of these fans believe that they can perform the selection process far better than those tasked with the responsibility. Fantasy leagues, provide a platform for fans to test their hand at this selection procedure. Twenty20 cricket is a new and exciting form of cricket and has become very popular in recent years. This research focuses on bringing these concepts together by proposing a binary integer program to determine a team selection strategy for fantasy league cricket. This is done in a Twenty20 setting. The approach used in this study focuses on evaluating the effectiveness of previously developed performance measures in a fantasy league setting. Adjustments to these measures are made and new measures are proposed. These measures are then used to select a fantasy league team using a prospective approach. This is done to provide fantasy league participants with a mathematical procedure for fantasy league team selection.

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Croft, Chris. „Factors influencing Big 12 Conference college basketball male student-athletes' selection of a university“. To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2008. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.

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7

Lourens, Mark. „Integer optimization for the selection of a twenty20 cricket team“. Thesis, Nelson Mandela Metropolitan University, 2008. http://hdl.handle.net/10948/1000.

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During the last few years, much effort has been devoted to measuring the ability of sport teams, as well as that of the individual players. Much research has been on the game of cricket, and the comparison, or ranking, of players according to their abilities. This study continues preceding research using an optimization approach, namely, a binary integer programme, to select an SA domestic Pro20 cricket team.

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Lilja, Henric. „SELECTION AND PSYCHOSOCAL PREDICTORS OF WELLBEING: A STUDY AMONG FOTBALL ACADEMY PLAYERS“. Thesis, Högskolan i Halmstad, Centrum för forskning om välfärd, hälsa och idrott (CVHI), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-16605.

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The objectives were to study: (1) if psychosocial factors (such as social support from coaches and peers), within a football context, could predict psychological well-being among soccer academy players (2) the relationship between selection and well-being among football academy players and (3) compare the age categories 11-14 and 15-19 in perceived wellbeing, experiences of selection and social support from coaches and peers. In total, 443 players from four academy settings participated in the study. The player’s ages differences were between 11-19 years. The instrument used was the Swedish health survey developed by the Swedish Health Institute with a number of football specific items added. Result suggests a regression model including two variables (social support from coaches and peers) explaining 16, 6 % of the psychological well-being. Further, a negative relationship was found between selection and perceived well-being. Another finding was that the youth players (11-15 years) experienced higher levels of social support and psychological well-being, but experienced selection more negatively compared to junior players (15-19 years). Recommendations are given to coaches to be aware of developing a supportive coaching style. Another recommendation to increase well-being is to develop support mechanisms to help the youth players in academy settings to cope with the pressure of selection. The results are discussed in relation to theoretical frameworks and previous research. Keywords: Football academies, psychological well-being, social support and selection
Svenska fotbollsförbundet

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9

DUCA, MARCO. „EFFECTS OF RESISTANCE TRAINING ON SELECTION AND PERFORMANCE IN RUGBY UNION PLAYERS“. Doctoral thesis, Università degli Studi di Milano, 2021. http://hdl.handle.net/2434/818776.

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Introduzione: Durante una partita, le richieste di gioco per un giocatore di rugby dipendo dalla posizione in cui gioca. Gli avanti sono coinvolti più spesso in fasi statiche (mischie, raggruppamenti a terra e in piedi), mentre i tre quarti devono svolgere più frequentemente azioni dinamiche (sprintare, saltare, cambiare direzione). Sono queste richiese di gioco a determinare le caratteristiche antropometriche e fisiche richieste ad un giocatore per avere successo. Gli avanti sono più pesanti e forti, mentre i tre quarti sono più snelli e veloci. In generale, nonostante la letteratura riporti che giocatori più pesanti e pesanti siano favoriti ad essere selezionati per le competizioni internazionali, le informazioni sono limite per quanto riguarda giocatori italiani. Corporatura, forza, potenza e velocità possono essere efficacemente migliorate con un allenamento con sovraccarichi. Al momento però non vi sono informazioni definitive rispetto a quale sia la metodologia più efficace da impiegare quando si allenano degli atleti. Per esempio, l’efficacia dell’allenamento fino al cedimento muscolare (FAIL), che sembrava essere indispensabile per migliorare ipertrofia e forza muscolare, più recentemente è stata contestata poiché l’allenamento senza cedimento muscolare (NO-FAIL) è stato mostrato garantire superiori miglioramenti nei valori di forza e potenza degli atleti. Scopo: Lo scopo di questa tesi è duplice. Dapprima individuare quali caratteristiche siano perditrici della selezione per competizioni internazionali in giocatori italiani della categoria U20. In secondo luogo, quale tra FAIL e NO-FAIL, possa maggiormente migliorare le caratteristiche antropometriche e fisiche dei giocatori. Metodi: Per il primo scopo, è stata svolta un’analisi retrospettiva sulle caratteristiche fisiche e antropometriche, raccolte testando le variabili di 72 giocatori U20. È stata svolta un’analisi della varianza (ANOVA) a due vie, ponendo come fattori tra soggetti la posizione e la selezione per competizioni internazionali. La selezione è stata inoltre posta come variabile dipendente della regressione logistica. Per il secondo scopo, 16 giocatori di rugby amatoriali sono stati assegnati ad uno di due gruppi sperimentali (FAIL o NO-FAIL) e hanno svolto un programma di allenamento 11 contro sovraccarichi della durata di sette settimane. Le variabili antropometriche e fisiche sono state testate prima e dopo il programma sperimentale. Risultati: ANOVA non ha rilevato nessun effetto significativo per l’interazione. La massa corporea e la forza massimale degli arti inferiori sono risultate perditrici della selezione nei giocatori U20. Analizzando gli effect size, è stato possibile vedere che i giocatori del gruppo NO-FAIL sono migliorati maggiormente nella forza massimale degli arti inferiori, nell’altezza e potenza del salto verticale, nello sprint e nel cambio di direzione. Conclusioni: corporatura e forza massimale dei giocatori sono fondamentali per la selezione a livello internazionale nel rugby. L’allenamento con sovraccarichi FAIL comporta dei miglioramenti inferiori in queste variabili e quindi dovrebbe essere evitato. I preparatori atletici dovrebbero preferire l’uso di metodologie che consentano una maggior regolazione dell’intensità di allenamento, così da sfruttare i superiori miglioramenti di forza, potenza e velocità.
Introduction: Rugby union players must cope with diverse match demands depending on the playing position. Forwards (FWS) are more often engaged in static exertions (scrums, rucks, mauls) while backs (BKS) exhibition more dynamic actions (sprints, jumps, change of direction). These match demands dictate the anthropometrical and physical characteristics required to players to be successful. FWS are heavier and stronger, while BKS are leaner and faster. Despite the literature shows an overall advantage for stronger and heavier players to selection for international competition, limited data is present for Italian players. Body size, strength, power, and speed can be effectively improved by resistance training (RT). Yet, the debate is still open on the most effective RT modality for athletes. For instance, the efficacy of training to momentary muscular failure (FAIL), which seemed paramount towards increase muscle hypertrophy and strength, have recently been debated as RT not to failure (NO-FAIL) showed superior improvement in athletes’ strength and power. Aim: The aim of this thesis is two folds. First, which characteristics are predictor of selection for international competitions in Italian U20 players. Secondly, to assess the superior efficacy of either FAIL or NO-FAIL RT programs on improving players’ anthropometric and physical characteristics. Methods: For the first aim, anthropometric and physical characteristics, collected testing the variables of 72 U20 players, were retrospectively analyzed. Two-way analysis of variance, with selection for international tournaments and playing position as between subjects’ factors, was completed. Selection was also chosen as the dependent variable of multiple logistic regressions. For the second aim, 16 amateur rugby players were assigned to one of two groups (FAIL or NO-FAIL) and completed a seven weeks long RT program. Players’ anthropometric and physical variables were tested before and after the intervention. Results: ANOVA did not detect any significant interaction effects. The players’ body mass and lower body maximal strength resulted predictors of selection for U20 players. Analysis of the 13 effect sizes qualified that NO-FAIL RT allowed for superior improvements in lower body maximal strength and power, vertical jump height and power, linear sprint and change of direction. Conclusions: players’ body size and maximal strength are crucial for international selection in rugby. RT to FAIL elicits inferior improvements in these variables, and it should therefore be avoided. Strength and conditioning coaches should favor methods that allow for a better training intensity management in rugby players and exploit superior improvements in strength, power and speed.

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Forslund, Ola. „Scattering and propagation of electromagnetic waves in planar and curved periodic structures - applications to plane wave filters, plane wave absorbers and impedance surfaces“. Doctoral thesis, KTH, Alfvén Laboratory, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3825.

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The subject of this thesis is scattering of electromagneticwaves from planar and curved periodic structures. The problemspresented are solved in the frequency domain.

Scattering from planar structures with two-dimensionalperiodic dependence of constitutive parameters is treated. Theconstitutive parameters are assumed to vary continuously orstepwise in a cross section of a periodically repeating cell.The variation along a longitudinal coordinate z is arbitrary. Ageneral skew lattice is assumed. In the numerical examples, lowloss and high loss dielectric materials are considered. Theproblem is solved by expanding the .elds and constitutiveparameters in quasi-periodic and periodic functionsrespectively, which are inserted into Maxwells equations.Through various inner products de.ned with respect to the cell,and elimination of the longitudinal vector components, a linearsystem of ordinary di.erential equations for the transversecomponents of the .elds is obtained. After introducing apropagator, which maps the .elds from one transverse plane toanother, the system is solved by backward integration.Conventional thin metallic FSS screens of patch or aperturetype are included by obtaining generalised transmission andre.ection matrices for these surfaces. The transmission andre.ection matrices are obtained by solving spectral domainintegral equations. Comparisons of the obtained results aremade with experimental results (in one particular case), andwith results obtained using a computer code based on afundamentally di.erent time domain approach.

Scattering from thin singly curved structures consisting ofdielectric materials periodic in one dimension is alsoconsidered. Both the thickness and the period are assumed to besmall. The .elds are expanded in an asymptotic power series inthe thickness of the structure, and a scaled wave equation issolved. A propagator mapping the tangential .elds from one sideto the other of the structure is derived. An impedance boundarycondition for the structure coated on a perfect electricconductor is obtained.

Keywords:electromagnetic scattering, periodicstructure, frequency selective structure, frequency selectivesurface, grating, coupled wave analysis, electromagneticbandgap, photonic bandgap, asymptotic boundary condition,impedance boundary condition, spectral domain method,homogenisation

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Hugg, Peter J., und n/a. „The selection of Australian youth soccer players based on physical and physiological characteristics“. University of Canberra. Human & Biomedical Sciences, 1996. http://erl.canberra.edu.au./public/adt-AUC20060726.172530.

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The purpose of this study was to develop a physiological profile of elite Australian Youth soccer players. Over three years, 150 players from the U'17, U'20 and U'23 national squads were tested for six measurements - height, weight, sum of eight skinfolds, vertical jump, maximum oxygen consumption and speed over twenty metres. Comparisons were made between those selected in the final team (classified as Successful) and those who failed to be selected (classified as Unsuccessful) to determine any significant differences between the two groups A physical and physiological profile was obtained for each player - expressed as a single value in both numerical and graphical formats. Players were ranked based on this score to determine significant differences between successful and unsuccessful players. Several significant differences (p<0.05) were found between Successful and Unsuccessful groups for a number of the variables primarily in the performance area rather than in the anthropometry parameters. For all squads, significant differences (P<0.05) were found between those who made the squad and those who did not when ranked based on their physical and physiological score. This study highlights the importance of the application of scientific testing to soccer Furthermore, it provides a system by which players' results can be analysed and ranked, and expressed in a format that provides the coach with immediate feedback as to an individual's specific strengths and weaknesses as a basis for training and team selection.

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Booysen, Conrad. „Designing a protocol and comparative norms for the indentification and selection of talent among elite age-group rugby players in South Africa“. Pretoria : [s.n.], 2007. http://upetd.up.ac.za/thesis/available/etd-10292008-174722.

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13

Masocha, Vincent. „Body composition and functional fitness capacity of young academy soccer players in South Africa and Zimbabwe“. Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85748.

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Thesis (MScSportSc)--Stellenbosch University, 2013.
ENGLISH ABSTRACT: Talent identification and early selection into a professional soccer academy has been reported to be very important for the long term development of footballing expertise (Le Gall et al., 2010). This awareness of the need for early identification of gifted youngsters has led to an increased number of soccer centres of excellence and academies throughout the world. Traditionally, identification and selection of promising individuals into youth soccer academies has been linked to a coach’s subjectivity and preconceived image of the player. Once this method is used in isolation it can result in tedious misjudgements in talent identification - hence the emphasis on science-based approaches. Through soccer-specific research, a number of anthropometric and physical parameters have been linked to successful performance in soccer. The primary aims of the study were to explore the anthropometric, somatotype and functional fitness characteristics of young academy soccer in South Africa and Zimbabwe and to distinguish variables that can be relevant for Talent Identification. The study followed a quantitative non-intervention design with a sample of convenience. A total of 74 young soccer players (Age 15.9±0.81) from South African (n = 41) and Zimbabwean (n = 33) soccer academies were purposively sampled. The following anthropometric variables were measured following the International Society of the Advancement of Kinanthropometry (ISAK) protocol: body mass and height; skinfolds – (triceps, subscapular, biceps, iliac crest, supraspinale, abdominal, front thigh, medial calf); Girths – (arm relaxed, arm flexed and tensed, waist, gluteal, and calf); bone breadths – (biepicondylar humerus and biepicondylar femur). Functional fitness variables that were measured include: lower back muscle flexibility (sit and reach test), upper body flexibility (shoulder flexibility), leg power using (vertical and horizontal jumps), overhead throw (2kg medicine ball throw), speed tests (10, 20, and 40m sprint tests), agility (Illinois test) and aerobic fitness (Hoff test). There were no statistically significant differences in age, body mass, height, fat mass, body mass index, lower back flexibility, right shoulder flexibility, 20m sprint, and endurance capacity (p>0.05). Statistically significant differences were found in percentage body fat (p>0.05), sum of 8 skinfolds, fat free mass, somatotype, left shoulder flexibility, upper and lower body power, 10m and 40m sprints (p<0.01). South African players were found to have higher %BF and sum of skinfolds and then Zimbabwean players. It was concluded that Zimbabwean players performed significantly better than South Africans in agility, 10m, 40m sprints, vertical jump, horizontal jump and overhead throw and had better future chances of success in soccer. Goalkeepers were taller and heavier, while midfielders and defenders were found to be lighter and shorter. Goalkeepers were the most agile group, while forwards were the fastest group. Agility, power and speed were the most important variables that can be used during talent selection and coaches should purposefully work to develop these characteristic during training sessions. Height and weight are relevant in allocating positional roles to players and not in Talent Identification.
AFRIKAANSE OPSOMMING: Talentidentifisering en vroeë seleksie in ŉ professionele sokkerakademie blyk baie belangrik te wees vir die langtermyn ontwikkeling van sokker vaardighede (Le Gall et al., 2010). Hierdie behoefte vir die vroeë identifisering van talentvolle jong spelers het aanleiding gegee tot ŉ toename in sokker sentra van uitnemendheid en akademies wêreldwyd. Tradisioneel is die identifisering en seleksie van belowende individue vir toelating tot ŉ jeug sokker akademie aan ŉ afrigter se subjektiwiteit en voorafopgestelde idees van die speler gekoppel. Wanneer die metode in isolasie gebruik word kan dit dodelike mistastings in talent identifisering teweeg bring – daarom die klem op wetenskaplik gebaseerde benaderings. Deur sokker spesifieke navorsing is daar alreeds ŉ aantal antropometriese en fisieke parameters aan suksesvolle prestasie in sokker gekoppel. Die primêre doelwitte van die studie was om die antropometrie, somatotipe en funksionele fiksheidskenmerke van jong sokker akademie spelers in Suid-Afrika en Zimbabwe te ondersoek en om veranderlikes wat relevant vir talentidentifisering kan wees te onderskei. Die studie het ŉ kwantitatiewe, nie-intervensie ontwerp met ŉ gerieflikheidsteekproef gevolg. ŉ Totaal van 74 jong sokkerspelers van Suid-Afrika (n = 41) en Zimbabwe (n = 33) sokker akademies is doelgerig geselekteer (ouderdom 15.9 ± 0.81 jaar). Die volgende antropometriese veranderlikes is ooreenkomstig met die International Society of the Advancement of Kinanthropometry (ISAK) protokol gemeet: liggaamsmassa en -lengte; velvoue (triseps, subskapulêr, biseps, iliokristale vou, supraspinalis, abdominale, quadriseps, mediale gastroknemius); omtrekke (arm ontspanne, arm in fleksie en gespanne, middel, gluteale, en kuit); been breedtes (biepikondelêre humerus en biepikondelêre femur). Funksionele fiksheidsveranderlikes wat gemeet is was: laerug spierlenigheid (sit en reik toets), boonste ekstremiteit lenigheid (skouer lenigheid), beenkrag (vertikale en horisontale spronge), oorhoofse gooi (2kg medisyne balgooi), spoedtoets (10, 20, en 40m spoedtoetse), ratsheid (Illinois toets) en aërobiese fiksheid (Hoff toets). Geen statisties betekenisvolle verskille is in ouderdom, liggaamsmassa, -lengte, vetmassa, liggaamsmassa indeks, laerug lenigheid, regterskouer lenigheid, 20 meter spoed en uithouvermoë kapasiteit (p>0.05) tussen SA en Zimbabwe spelers gevind nie. Statisties betekenisvolle verskille is wel in persentasie liggaamsvet (p<0.05), som van agt velvoue, vetvrye massa, somatotipe, linkerskouer lenigheid, boonste en onderste ekstremiteit liggaamskrag, 10m en 40m spoed (p<0.01) gevind. Suid-Afrikaanse spelers het ŉ hoër persentasie liggaamvet en som van velvoue as die Zimbabwiese spelers gehad. Daar is tot die gevolgtrekking gekom dat Zimbabwiese spelers betekenisvol beter as Suid-Afrikaanse spelers in die meeste fiksheidstoetse gevaar het en waarskynlik beter kanse vir sukses in sokker het. Doelwagters was groter en swaarder, terwyl middelveld spelers en verdedigers ligter en korter was. Doelwagters was die ratste groep, terwyl voorspelers die vinnigste groep was. Ratsheid, krag en spoed is as die belangrikste veranderlikes geïdentifiseer wat tydens talentidentifisering gebruik kan word en afrigters moet doelbewus daaraan werk om hierdie eienskappe tydens oefensessies te ontwikkel. Lengte en gewig is relevant in die toekenning van posisionele rolle aan spelers en nie in talentidentifisering nie. Hierdie is die eerste studie waarin die antropometriese en funksionele fiksheidsprofiele van jong sokkerspelers in Suid-Afrika en Zimbabwe met mekaar vergelyk word. Dit baan die weg vir ander navorsers om hierop uit te brei deur sokkerspelers van ander lande in Afrika te toets en by te dra tot die kennis van sokkerspelers in Afrika. Hierdie navorsing skep ook die basis vir afrigters en oefenkundiges in Afrika om die bydrae wat die wetenskap maak ten opsigte van liggaamsamestelling en funksionele fiksheid beter te verstaan om talentidentifisering in sokker te verbeter.

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Allen, Crystal N. „Factors that influence the college selection process of Division I, II, and III softball players“. Virtual Press, 2006. http://liblink.bsu.edu/uhtbin/catkey/1355598.

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This study investigated the factors that were influential in the college selection process of NCAA Division I, II and III softball players. It also investigated the differences between the influential factors for student-athletes at Division I small institutions, medium institutions, and large institutions. The participants in this study consisted of 21 teams or 323 female collegiate softball student-athletes and the instrument used was the Influential Factors Survey for Student-Athletes. The top five influential factors were the school offers specific major of interest, academic reputation of college, coach's personality/style, academic facilities (library, computer labs, etc.), and the opportunity to play early in career. The academics section of the survey was deemed most influential by the softball student-athletes in this study. Differences were found within the college selection process of softball student-athletes at Division I, Division II, and Division III institutions (p < .05). Division I student-athletes viewed athletics as more influential than Division II student-athletes. Division II student-athletes viewed academics as more influential than both Division I student-athletes and Division III student-athletes. Division II student-athletes viewed social atmosphere as more influential than Division I student-athletes and also revealed that Division III student-athletes viewed social atmosphere as more influential than Division II student-athletes. Division I student-athletes viewed coaching staff as more influential than Division II student-athletes and Division III student-athletes. Division II student-athletes viewed financial aid as more influential than Division I student-athletes and Division III student-athletes. Differences were also found within the college selection process of softball student-athletes at NCAA Division I small, medium, and large conferences (p < .05). Division I, large school student-athletes viewed athletics as more influential than Division I, medium school student-athletes and Division I, small school student-athletes. Division I, small school student-athletes viewed financial aid as more influential than Division I, large school student-athletes. It can be concluded form the current study that softball student-athletes feel academic factors are the most influential in selecting a college or university to attend.
School of Physical Education, Sport, and Exercise Science

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Speer, George B. (George Blake). „Factors or Criteria Used by Female Basketball Players in Selecting a College“. Thesis, University of North Texas, 1992. https://digital.library.unt.edu/ark:/67531/metadc278835/.

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This study was an attempt to identify the factors that female basketball players consider important in their selection of a college to attend. A questionnaire was sent to all scholarship-granting junior colleges and Division I National Collegiate Athletic Association universities in the State of Texas during the 1991 spring semester. Students from 11 junior colleges and 11 Division I universities replied to the survey. The findings of this study are based on data collected from the 244 subjects' responses to a four-page, paired-comparison questionnaire. According to the junior college basketball players, the availability of scholarships and the opportunity to play were the two most important factors in their sleection of a college. Six other factors that were considered important to the junior college players' selection of a college were parental influence, the head coach, degrees offered, high school coaches' influence, geographical location of the university, and the style of ball played. The availability of scholarships was the most important factor in Division I female basketball players' selection of a university. Five other factors considered to be significant by Division I female players were the opportunity to play, the geographical location of the university, the degrees offered, the university facilities, and the head coach. A high positive correlation was found between the rankings of the junior college and the Division I female basketball players.

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Ravindranathan, Sampurna. „Identification of Discriminating Motifs in Heart Rate Time Series Data of Soccer Players“. University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535636263727764.

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Claasen, Petrus Jacobus. „Assessing the quality of decision-making of expert rugby players“. Diss., University of Pretoria, 2008. http://hdl.handle.net/2263/23882.

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The study of cognition as it relates to expert performance in sport is an area that has received increased attention over the last 25 years. This has been made possible by the fact that the domain of sport offers a rich and diverse setting in which to study cognition and its links to human performance, coupled with the abundant supply of highly practiced athletes providing unique opportunities to study these factors in a natural environment. The quality of on-field decision-making of expert athletes has received attention in a number of open-skill sporting codes, including basketball, field hockey and soccer. Decision-making quality of expert athletes in rugby union, as an invasive, open-skill sporting code, has not received the same amount of attention. Past studies on the decision-making of expert athletes in sport have tended to be carried through the isolation of specific cognitive functions and describing the role of each isolated function in the decision-making process. Given the speed at which decisions have to be made, as a result of time pressure, the isolation of cognitive functions yields valuable insights into the decision-making processes of expert athletes in competitive, on-field situations. While these cognitive functions can be studied in isolation, they do however form part of a bigger process that enables the expert athlete to make high quality on-field decisions. It is for this reason that it was decided to study these different functions in combination, as set out by the Information Processing Approach to cognitive functioning. According to this approach, the decision-making process consists on three main phases, namely that of Visual Search Strategies, Anticipation and Response Selection. This study was aimed at examining the quality of on-field decision-making of expert rugby players, as well as the influence of the competitive level at which rugby is played on decision-making quality. In order to achieve this goal it was necessary to develop a measurement instrument that can be used by expert rugby players to assess the quality of decisions made on the field of play. As it is difficult for outside observers to establish what players are thinking or focusing their attention on when making decisions on the field, it was necessary to design the instrument as a self-report measure of decision-making. By being made aware of one’s strong and weak points in on-field decision-making, expert rugby players can focus their attention on improving the underdeveloped facets of their game. The measurement of decision-making according to three distinct phases allows for increased accuracy in the identification of those cognitive areas that need improvement in order to improve overall playing ability. By changing the way the expert rugby player thinks about certain aspects of the game, most notably those aspects that the player has difficulty with, it becomes possible for the player to address these difficulties and make improvements wherever necessary. Copyright
Dissertation (MA)--University of Pretoria, 2010.
Psychology
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Ingestad, Gunilla. „Bokskog för framtiden : Planer och visioner för en bokplantering“. Thesis, Linnéuniversitetet, Institutionen för skog och träteknik (SOT), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-42898.

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Objekt för undersökningen är en nyplantering av bok på en mindre skogsfastighet i sydöstra Blekinge. Bok och ek, som är de viktigaste ädla lövträden för den biologiska mångfalden, intog i dessa trakter en stor andel av skogsbeståndet fram till 1960-70-talet, men har sedan minskat i takt med att de ersatts av planterad gran. Det finns idag, bland annat i Skogsstyrelsens riktlinjer, en uttalad strävan mot en högre andel ädellövskog på de breddgrader som ingår i dessa trädslags naturliga utbredningsområden. På så sätt kan det projekt, som studien beskriver, anses ligga rätt i tiden. Inledningsvis ger rapporten en översikt över skog och skogsbruk som kunskapsområde och bakgrunden till att vi nu ser tendenser till att de traditionella formerna av skogsbruk, där ekonomi är den dominerande styrfaktorn, börjar ge vika för skogsbruksmetoder som gynnar även naturvårds- och sociala värden. Detta är en tendens som nu börjar få genomslag såväl i myndigheters styrdokument som i forskning och kunskapsutveckling. I rapporten beskrivs utvecklingen av en tio-årig plantering av bok, dels resultatet av den första fasen, etableringsfasen, och dels en bedömning av hur den framtida planeringen kan göras utifrån de uppställda målen med fokus på de skötselformer som kan betecknas som ”hyggesfria” eller ”naturnära” metoder. I analysen av studiens resultat görs jämförelser dels med liknande studier och dels med schabloniserade tillväxtprognoser för bok. En satsning på naturnära skogsbruk och på lövskog ger, enligt de sammanfattande slutsatserna, inte de högsta ekonomiska vinsterna i dagsläget. Däremot kan det, med ett långsiktigt skötselprogram, ses som en framtidsinvestering. Dels fås en kvalitetshöjning av framtida jordmån och växtbetingelser och större chans att klara stormar och dess effekter. En ytterligare vinst är möjligheten att vara med och bygga erfarenheter av och kunskap om utvecklingen av ett framtida lövskogsbruk.
The aim of this study was to evaluate an area, where planting of beech, Fagus sylvatica, has been made after clear cutting of spruce, Picea abies. Focus of the study was primary to follow-up the first phase of the planting, and also make an assessment of future planning based on such achievements as "selective cutting" or "natural" methods. In the result analysis comparisons are made with similar studies and also previous results for the area. An investment in natural methods for deciduous forest gives, according to the summary conclusions, not the highest economic gains in the current situation. However, with a long-term care program you can reach investment possibilities. On the one hand you get increase in quality of future soil and growing conditions, and greater chance of passing climate change and their effects. An additional profit is the opportunity to be part of building experience and knowledge of the development of a future broadleaved forest.

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Picogna, Giovanni. „Planet formation in binary star systems and its relevance during target selection for extrasolar planet search with the transit method“. Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3424033.

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In this Thesis I have studied the impact of binary stars on planet formation and evolution in order to maximize the process of target selection in a future space mission devoted to planet detection. The impact has been firstly addressed via a statistical analysis of the frequency and characteristics of planets in those complex systems. Then, a more in-depth investigation has been made by modeling different planet formation stages in circumbinary and circumstellar environments. I have also studied the impact of close stellar encounters on the evolution of planetary systems in order to explore the relevance of this effect on the statistics of exoplanet mass and orbital distributions. According to the outcome of my simulations the presence of the companion star has a strong impact on planet formation and evolution process. The protoplanetary disk is strongly perturbed, exhibiting tidal waves and developing an overall eccentric shape. In the third dimension hydraulic jumps are observed that could prevent the dust sedimentation and halt the planetesimal formation. In circumbinary disks, the planetesimal evolution appears strongly affected by the asimmetry of the gravitational field of the eccentric disk, that excites mutual planetesimal velocities, favouring fragmentation rather than accretion, thus preventing planet formation. All these effects together influence the overall statistics of planets in binaries and must be taken into account when deriving the general properties of exoplanet systems since the majority of stars are born in multiple configurations, and nearly half of the them are part of a binary system in the Galactic field. Planets in binaries are expected to be a frequent and interesting occurrence and will have a high impact on the target selection process. Future space missions will for sure improve our statistic of these planetary systems, and allow a better understanding of the complex process of planet formation in these esotic environments.
In questa tesi ho studiato l'impatto della binarietà sulla formazione ed evoluzione planetaria allo scopo di massimizzare il processo di selezione dei target in una futura missione spaziale dedicata alla scoperta di transiti planetari. L'impatto è stato studiato prima con un'analisi statistica della frequenze e delle caratteristiche dei pianeti in questi sistemi complessi. In seguito, si è eseguito uno studio più dettagliato dalla modellizzazione di diversi scenari di formazione planetaria in sistemi circumbinari e circumstellari in binarie. Inoltre, ho studiato l'impatto dei flyby stellari sull'evoluzione dei sistemi planetari per capire la rilevanza di questo fenomeno sulla distribuzione statistica della massa e dei parametri orbitali dei pianeti extrasolari osservati. Dal risultato delle simulazioni effettuate, la presenza della compagna stellare nel sistema binario ha un forte impatto sul processo di formazione ed evoluzione dei sistemi planetari. I dischi protoplanetari sono fortemente perturbati, mostrando delle onde mareali e sviluppando una forma eccentrica. Nella terza dimensione si osservano dei salti idraulici che possono prevenire la sedimentazione e bloccare il processo di formazione planetaria. Nei dischi circumbinari, l'evoluzione dei planetesimi appare fortemente influenzata dall'asimmetria del campo gravitazionale del disco eccentrico, portando ad un incremento delle velocità mutue e favorendo la frammentazione piuttosto che l'accrescimento in protopianeti. Tutti questi effetti influenzano la statistica dei pianeti in binarie e devono essere presi in considerazione quando si vuole derivare le proprietà generali dei sistemi planetari, poiché la maggior parte delle stelle si è formata in configurazioni multiple e circa la metà di esse nel campo galattico è parte di un sistema binario. Ci si aspetta che i pianeti in binarie siano un evento frequente ed interessante e dunque abbiano un impatto notevole nel processo di selezione dei target. Le missioni spaziali future sicuramente miglioreranno la statistica di questi sistemi planetari, e permetteranno una più profonda comprensione dei complessi processi di formazione planetaria in questi ambienti esotici.

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Lee, Kyung-ae. „A comparative study of Claude Debussy's piano music scores and his own piano playing of selections from his Welte-Mignon piano roll recordings of 1912“. Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3035961.

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Liang, Qiang. „Interfacial structure of delta phase in Inconel 718 and the selection of precipitate habit planes“. Diss., Virginia Tech, 1996. http://hdl.handle.net/10919/37775.

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Malladi, Vijaya Venkata Narasimha Sriram. „Continual Traveling waves in Finite Structures: Theory, Simulations, and Experiments“. Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/81451.

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A mechanical wave is generated as a result of an external force interacting with the well-defined medium and it propagates through that medium transferring energy from one location to another. The ability to generate and control the motion of the mechanical waves through the finite medium opens up the opportunities for creating novel actuation mechanisms not possible before. However, any impedance to the path of these waves, especially in the form of finite boundaries, disperses this energy in the form of reflections. Therefore, it is impractical to achieve steady state traveling waves in finite structures without any reflections. In-spite of all these conditions, is it possible to generate waveforms that travel despite reflections at the boundaries? The work presented in this thesis develops a framework to answer this question by leveraging the dynamics of the finite structures without any active control. Therefore, this work investigates how mechanical waves are developed in finite structures and identifies the factors that influence steady state wave characteristics. Theoretical and experimental analysis is conducted on 1D and 2D structures to realize different type of traveling waves. Owing to the robust characteristics of the piezo-ceramics (PZTs) in vibrational studies, we developed piezo-coupled structures to develop traveling waves through experiments.The results from this study provided the fundamental physics behind the generation of mechanical waves and their propagation through finite mediums. This research will consolidate the outcomes and develop a structural framework that will aid with the design of adaptable structural systems built for the purpose. The present work aims to generate and harness structural traveling waves for various applications.
Ph. D.

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Booysen, Conrad. „Designing a protocol and comparative norms for the identification and selection of talent among elite age-group rugby players in South Africa“. Thesis, University of Pretoria, 2007. http://hdl.handle.net/2263/29112.

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Talent identification and the subsequent development of those individuals with the most potential to succeed is currently of great concern for sporting bodies in a number of countries and South Africa is no exception. Sport in South Africa holds a position of great prominence and has been used in many instances to facilitate national unity and pride. Rugby Union is one of the most prominent sports in South Africa and it is in this sport that South Africa has achieved a great measure of success, both historically and currently. It is a sport in which the future sustainability of this success is high on the agenda. There have been a number of studies on talent identification in rugby and this study aims to contribute to that body of knowledge. To achieve this contribution, this study has two primary goals and aims. This study has as its primary goals and aims: 1) to have a sound theoretical base provided by in-depth and up to date research that will form the foundation for, 2) reviewed and alternative sport and position-specific testing protocols as well as comparative results consisting of norms and scores that will adequately identify and select those capable of participating in elite age-group rugby union. Contained in the theoretical base of this study is a review of the physical parameters required to succeed in sport, a discussion of the nature vs. nurture debate and a review of the developmental approaches to talent and ability. Other factors such as psychological skills, abilities and attributes and a historical review of talent identification models and approaches world-wide as well as in South Africa have also been provided. In all, the first primary aim and goal of this study has therefore successfully been achieved. Thereafter, the reviewed and alternative test protocol has been presented, discussed and executed, followed by an analysis of the results obtained. Specific achievements of this study are that new and modified tests (3x5x22m Anaerobic capacity test, S-Test and the Kick-for-distance and accuracy test) for talent have been developed and that specific scores and norms for these new tests, as well as other pre-existing tests, have been established for future reference. In noting the success of the alternative, broad-position specific protocol and the establishment of scores and norms, the second primary goal and aim of this study can be said to be achieved. This study then ends with conclusions and further proposed recommendations. It can therefore be concluded with a great amount of certainty that this study has been successful not only in presenting as up to date research as possible in the fields of excellence and elite sport, but that furthermore, this study has provided a robust test protocol with comparative norms that can be used as an alternative identification and selection tool.
Thesis (DPhil)--University of Pretoria, 2007.
Biokinetics, Sport and Leisure Sciences
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ZERGUINE, DJAMAL. „Elaboration d'une technologie planar par reprise d'epitaxie selective par jets chimiques pour tbh gainp/gaas“. Paris 7, 1994. http://www.theses.fr/1994PA077111.

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Une technologie d'elaboration de transistors bipolaires a heterojonction a structure planar dans le systeme arseniure de gallium a ete etudiee. L'interet de cette technologie planar est d'accroitre la densite d'integration et la fiabilite des interconnexions metalliques pour la realisation de circuits complexes, notamment pour les telecommunications. La planarisation du transistor est assuree par un procede de reprise d'epitaxie selective vis a vis d'un masque dielectrique de la couche enterree du sous collecteur. L'isolation du dispositif est assuree par une implantation profonde de bore et proton. L'acces aux differentes couches du dispositif est assure par la realisation de contacts ohmiques, avec un metal refractaire en tungstene pour les couches de type donneur (couches superficielles de contact d'emetteur et de sous collecteur en alliage d'arseniure de gallium et d'indium), et une metallurgie en manganese-or pour la couche de base (arseniure de gallium de type accepteur, fortement dope au carbone). Les resistivites de contact obtenues sont de 10 puissance moins 6 ohm par centimetres carres. Des structures bipolaires a heterojonction phosphure de gallium et d'indium sur arseniure de gallium, a couches de base fortement dopees au carbone (dopage superieur a 4 par 10 puissance 19 atomes par centimetres cubes) avec une tres bonne stabilite thermique du dopant de base, ont ete realisees par croissance epitaxiale par jets chimiques, en utilisant des sources gazeuses organometalliques comme precurseurs des elements iii (gallium et indium) et des dopants (etain et carbone), et d'hydrures comme precurseurs des elements v (arsenic et phosphore). Un transistor planar a ete fabrique et caracterise. Ses caracteristiques electriques, statiques et dynamiques, sont presentees. Une frequence de transition de 30 gigahertz et une frequence maximale d'oscillation de 25 gigahertz ont ete obtenues sur un transistor dont les surfaces de jonction emetteur-base et collecteur-base sont respectivement de 2x15 microns carres et 6x15 microns carres

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Arkell, Robin. „Body size, socioeconomic status and training background of a select group of U16 South African rugby union players (2010-2013): The impact on national selection“. Master's thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/20679.

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Background: Rugby Union is an international sport characterized by bouts of short duration, high intensity exercise in which players frequently collide into one another while running at high speeds. Players are commonly required to engage in phases of play involving contact such as tackling, rucking, mauling and scrumming. These phases of play require certain physical qualities, including strength, aerobic power, speed and explosive power. Perhaps, the growth and professionalization of the game has resulted in more emphasis being placed on the physical preparation of the players. Physical preparation of players not only happens at elite senior levels, but has also filtered down into the junior ranks, where it is common for school teams to be trained by professional strength and conditioning coaches. The rules of the game have changed, which have influenced the physical demands. For example, ball-in-play time has increased, players are covering more distance per game, making more tackles and engaging in more scrums. It is therefore important to identify the various physical characteristics that are required to be successful at a particular level of rugby union. The socioeconomic status and ethnicity of the player in association with the physical characteristics can determine the success of an adolescent rugby player. Objective: To determine the association between body mass and stature (referred to as physical characteristics for this study), race, socioeconomic status, and weight training (referred to as non-physical characteristics for this study) on the chances of success among U16 provincial rugby union players. In particular, size, socioeconomic status and ethnicity of players in the U16 national training squad were compared to players who represented their provinces but did not get selected for the national squad. Methods: Data were collected for each player who attended the Coca Cola National Grant Khomo week from 2010 to 2013. Players participating in this tournament had already undergone a process of selection trials to be selected to represent their province at U16 level. The national squad players were chosen based on performances at the Coca Cola National Grant Khomo week. The characteristics of the players selected for the national squad vs. players who did not get selected for the squad from 2010 to 2013 were compared using an ANOVA and the magnitude of the differences were quantified using effects sizes. Results: White players are heavier (ES = 0.59) and taller (ES = 0.8 2) than black players as well as heavier (ES = 0.8 7) and taller (ES = 0.8 2) than coloured players over the four-year period from 2010 to 2013. Players selected into the National squad were on average heavier (ES = 0.5 0) and taller (ES = 0.4 0) than those players not selected into the National squad. White players were the heaviest and tallest of the race groups selected into the National squad (p < 0.0000 2). Players with a high socioeconomic status were heavier (ES = 0.3 0), taller (ES = 0.4 0), and had more playing experience (ES = 0.3 0), than players from a low socioeconomic status background. Grouping according to socioeconomic status did not differentiate between race groups and selection for the national squad. Conclusion: This study showed that the taller and heavier players were more likely to get selected for the national U 16 squad. Since size was also associated with socioeconomic status, the players with a high socioeconomic status had an advantage over players with a low socioeconomic status. These findings have implications for transforming the game to ensure that the representative teams reflect the composition of the South African population.

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Lee, Seungwon Shawn. „Exploratory study of the impact of Information and Communication Technology (ICT)-based features in conference center selection/recommendation by meeting planners“. Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/37858.

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This study examined the perceived importance of availability of ICT-based features and technical support on meeting plannersâ recommendation/selection of a conference center. In addition, this study attempted to explain relationships between meeting plannersâ beliefs (perceived usefulness and perceived ease of use) toward ICT-based features and other factors: personal innovativeness of ICT (PIICT); perceived importance of the availability of technical support; self efficacy; and result demonstrability. A conceptually integrated and expanded model of the Technology Acceptance Model (TAM) developed by Davis (1986, 1989) was used as a theoretical frame. The subjects of the study were meeting planners who used the selected two conference centers for their meetings or were considering them for their future meetings. A total of 167 usable responses were gathered and the proposed model was empirically examined using the data collected. The results of the model test revealed that the expanded TAM with the integration of key factors provided a systematic view of the meeting plannersâ beliefs in selection/recommendation of a conference center with ICT-based features. In addition, factor analysis of the fifteen ICT-based features revealed three underlying dimensions based on meeting plannersâ perceived importance of the availability of each feature for a conference center selection: 1) high-speed wireless Internet; 2) network backbone; and 3) ICT-based service outlet. Specifically, high-speed wireless Internet was the most important ICT-based determinant of a conference center selection/recommendation to all types of meeting planners. Due to the exploratory nature of this study, the results provided limited facets of the impact of ICT-based feature and technical support on meeting facility selection/recommendation. Nevertheless, this study is the first research effort of its kind to investigate what type of ICT-based feature and technical support impact conference center selection/recommendation by different types of meeting planners the most. The results revealed that corporate meeting planners consider wireless Internet and a fast network more important in selection than other types of meeting planners do. The availability of ICT-based features was less important to association meeting planners when they make a conference center selection. This study also identified that there is a serious lack of knowledge in terms related to network backbones across all types of meeting planners. Technical support, especially on-site technical support, was perceived as very important to all types of meeting planners. This study also identified that meeting planners with high PIICT possess stronger confidence in using and visualizing the advantages of ICT-based features. Thus conference centers should make efforts to measure meeting plannersâ PIICT and use the score effectively for their marketing of ICT-based features. The study also identified result demonstrabilityâ the visualizing of positive outcomes of using ICT-based featuresâ as very important to meeting planners. PIICT and result demonstrability were positively related to perceived ease of use and perceived usefulness which were identified as key antecedents of actual acceptance/usage of technology in previous studies. The results of the current study present an important step toward providing practical as well as theoretical implications for future technology impact studies in the context of meeting facility selection.
Ph. D.

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Bolt, Jeffrey M. „iPod, You-pod, We All Pod For Stress Relief:An Investigation of Mood-Management Through Digital Portable Music Players“. Kent State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=kent1459350298.

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Fischer, Martin [Verfasser]. „Ordered arrangements of selective-area grown MnAs nanoclusters as components for novel, planar magneto-electronic devices / Martin Fischer“. Gießen : Universitätsbibliothek, 2016. http://d-nb.info/1090784317/34.

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Musetti, Caterina. „SELECTIVE TARGETING OF NUCLEIC ACIDS BY SMALL MOLECULES: A DNA STRUCTURE RECOGNITION APPROACH“. Doctoral thesis, Università degli studi di Padova, 2011. http://hdl.handle.net/11577/3422045.

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The discovery of new anticancer targets is the key factor for the development of more efficacious therapies. Sequence selective binding of double stranded DNA in the classical B form has been extensively employed to target small molecules to defined polynucleotide portions. More recently, ligand recognition of non canonical DNA foldings has been additionally considered a useful approach to selectively target distinct genomic regions. In this connection, G-quadruplexes represent an interesting system since they are believed to be physiologically significant arrangements. These non-canonical DNA structures are found at the ends of the human chromosomes (telomeres) as well as at promoter regions of several oncogenes where there is a cluster of guanine-rich sequences and they are likely to play important roles in the regulation of biological events. The induction and stabilization of the G-quadruplex arrangement by small molecules can lead to the inhibition of the telomerase activity by interfering with the interaction of the enzyme and its single stranded template. A similar molecular mechanism is likely involved in the transcriptional control that leads to the suppression of the oncogene transcription and, ultimately, in the regulation of the gene expression. As a result, the quadruplex topic is very attractive for the development of a specific anticancer strategy defined by a dramatic reduction of side effects, typical of chemotherapy. The purpose of this work is to investigate the interactions between novel classes of small molecules and different quadruplex DNA sequences and conformations. These new molecules were properly designed providing systematic atom-wise substitutions based on rational evaluations of previous studied compounds in order to increase their selectivity for G-quadruplex structures and to reduce toxic effects. Biophysical and biological properties of all new derivatives are herein evaluated at molecular and cellular level. The thesis work is divided into three main sections based on the structural features of the compounds object of study. The first part focuses on heterocyclic dications: upon changing their molecular binding shape, a correlation with G-quadruplex binding have been drawn. In particular it was possible to rationalize a shift in the binding modes, in particular between end stacking and groove recognition. Nevertheless a correlation between biophysical (G-quadruplex affinity) and biological (telomerase inhibition and cytotoxicity) results was not always clear. This feature may suggest the involvement of cellular targets different from the telomere and that are now under investigation. In Chapter 3, the DNA binding properties of some phenantroline derivatives in presence and in absence of Ni(II) and Cu(II) are investigated. We confirmed that different complex geometries involving one, two or three ligands per metal ion can affect the pattern of DNA recognition by driving nucleic acid conformational changes. Finally, in Chapter 4 some transplatin derivatives are evaluated. We focused our attention on defining the compounds capability to form adducts, with the nucleic acids, the nature of adducts and the kinetics of adduct formation not only on double strand DNA but also using single strand as well as G-quadruplex as targets. The results showed how different structural modifications can cooperate to greatly affect the potential interaction of the compounds. Interestingly it turned out their preference to react on single stranded DNA portions than to double stranded ones. This is probably due to an unfavourable orientation of the reactive groups when the molecule interacts with the DNA substrate. As a result, they appear to crosslink unpaired strands. By extending these results at cellular level they can reflect distinct distribution of platination site along the genome in comparison to cisplatin and even transplatin. The results obtained increment the available knowledge of DNA-small molecules interaction. In particular it emerged that a conserved interaction mode is consistent with biological effects. On the other hand, a shift in the binding mode can drive to different cytotoxic effects. This can provide a rationale for subsequent drug structure optimization leading to the development of new efficient and selective anticancer agents.
La scoperta di nuovi target anticancro è il fattore chiave per lo sviluppo di terapie sempre più efficaci. Lo studio del legame selettivo a sequenze di DNA a doppia elica nella classica forma B è stato largamente impiegato al fine di direzionare piccole molecole verso porzioni polinucleotidiche definite. Più recentemente, il riconoscimento (da parte di ligandi) di porzioni non canoniche di DNA si può tradurre in un metodo vantaggioso per indirizzare questi composti verso regioni distinte del genoma. A tale proposito, le strutture G-quadruplex rappresentano un sistema interessante poiché sono ritenute fisiologicamente significative. Queste strutture “non-canoniche” di DNA si trovano alle estremità del cromosoma (telomeri) così come in varie regioni promotrici di oncogeni in cui vi è un’abbondante presenza di residui guaninici e sembrano coinvolte nella regolazione di importanti eventi biologici. Pare infatti che l'induzione e la stabilizzazione di strutture G-quadruplex dalle parte di piccole molecole porti all'inibizione dell'attività della telomerasi interferendo con l'interazione tra l’enzima e il suo substrato a singola catena. Un simile meccanismo molecolare è probabilmente coinvolto anche nel controllo della regolazione dell'espressione genica e può portare alla soppressione della trascrizione di un oncogene. Di conseguenza, “l’approccio G-quadruplex” si rivela molto interessante per lo sviluppo di una strategia anticancro specifica caratterizzata anche da una riduzione drammatica degli effetti collaterali, tipici della chemioterapia. Lo scopo di questo lavoro è lo studio delle interazioni tra nuove famiglie di piccole molecole e diverse conformazioni di DNA G-quadruplex. Queste nuove molecole sono state opportunamente progettate apportando sostituzioni di atomi o gruppi funzionali basate sulla valutazione di composti precedentemente studiati al fine di aumentare la loro selettività per strutture G-quadruplex e di ridurre gli effetti tossici. Le proprietà biofisiche e biologiche di tutti i nuovi derivati sono state valutate al livello molecolare e cellulare. Il lavoro di tesi si divide in tre parti in base alle caratteristiche strutturali dei composti. La prima parte è dedicata alla studio di dicationi eterociclici: si è cercato correlare modifiche nella conformazione molecolare con l’affinita’ verso strutture G-quadruplex. In particolare è stato possibile razionalizzare cambiamenti della modalità di legame in base alla struttura dei composti esaminati. Tuttavia una correlazione fra i risultati biofisici (affinità G-quadruplex) e biologici (inibizione della telomerasi e citotossicità) non è risultata sempre definita. Ciò può suggerire il coinvolgimento di bersagli cellulari diversi dal telomero umano. Nel capitolo 3, sono state studiate le proprietà di legame al DNA di alcuni derivati fenantrolinici in presenza ed in assenza di Ni (II) e Cu (II). Abbiamo confermato che complessi caratterizzati da diverse geometrie che coinvolgono una, due o tre molecole per ione possono compromettere o meno il riconoscimento del DNA o determinare cambiamenti conformazionali dell'acido nucleico. Per concludere, il capitolo 4 è dedicato allo studio di derivati del transplatino. In particolare ci siamo focalizzati nel definire la capacità dei composti di formare addotti, la natura dei complessi e la cinetica di formazione del complesso non solo con DNA a doppio filamento ma utilizzando anche substrati a singola catena come il G-quadruplex. I risultati hanno dimostrato come diverse modifiche strutturali possano avere un ruolo importante nell’interazione dei composti con gli acidi nucleici. E’ risultata interessante la loro preferenzialità a reagire con porzioni di DNA a singolo filamento rispetto a sequenze a doppia elica. Ciò è probabilmente dovuto ad uno sfavorevole orientamento dei gruppi reattivi quando la molecola interagisce con il substrato di DNA. Di conseguenza, i composti sembrano formare un cross-link tra due filamenti non appaiati. A livello cellulare, questi risultati riflettono una distinta distribuzione del sito di platinazione all’interno del genoma rispetto al cisplatino e perfino rispetto al transplatino. I risultati ottenuti incrementano la conoscenza disponibile sull’interazione tra DNA e piccole molecole. In particolare è emerso che la conservazione della modalità di interazione si correla con effetti biologici definiti. Al contrario, una variazione della modalità di legame può portare a effetti citotossici differenti. Ciò può fornire una spiegazione razionale per una successiva ottimizzazione della struttura dei composti finalizzata allo sviluppo di nuovi agenti antitumorali efficaci e selettivi.

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Yahiaoui, Ala-Eddine. „Selective vehicle routing problem : cluster and synchronization constraints“. Thesis, Compiègne, 2018. http://www.theses.fr/2018COMP2449/document.

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Le problème de tournées de véhicules (Vehicle Routing Problem - VRP) est un problème d'optimisation combinatoire utilisé généralement pour modéliser et résoudre des différents problèmes rencontrés dans les systèmes logistiques et de transport. Dans cette thèse, nous nous sommes intéressés à l'étude et la résolution d'une classe de problèmes du VRP appelée les problèmes de courses d'orientation (Team Orienteering Problem - TOP). Dans cette catégorie de problèmes, il est a priori impossible de visiter tous les clients en raison de ressources limitées. On associe plutôt un profit à chaque client qui représente sa valeur. Ce profit est collecté lorsque le client est visité par l'un des véhicules disponibles. L'objectif est donc de sélectionner un sous ensemble de clients à servir tout en maximisant le profit total collecté. Dans un premier temps, nous avons introduit une nouvelle généralisation pour le TOP que nous avons appelé le Clustered TOP ou CluTOP. Dans cette variante, les clients sont regroupés en sous-ensembles appelés clusters auxquels nous associons des profits. Pour résoudre cette variante, nous avons proposé un schéma exact basé sur l'approche des plans sécants avec des inégalités valides supplémentaires et des pré-traitements. Nous avons également conçu une méthode heuristique basée sur l'approche order first-cluster second. Cette heuristique hybride combine une heuristique de type Adaptive Large Neighborhood Search qui explore l'espace des solutions et une procédure de découpage qui explore l'espace de recherche des tours géants. De plus, la procédure de découpage est renforcée par une recherche locale afin de mieux explorer l'espace de recherche. Le deuxième problème traité dans ce travail s'appelle le Synchronized Team Orienteering Problem with Time Windows (STOPTW). Cette variante avait été initialement proposée afin de modéliser des scénarios liés à la protection des infrastructures stratégiques menacées par l'avancée des feux de forêts. En plus des contraintes de fenêtres de temps et des visites synchronisées, cette variante considère le cas d'une flotte de véhicules hétérogène. Pour résoudre ce problème, nous avons proposé une méthode heuristique basée sur l'approche GRASP×ILS qui est parvenue à dominer la seule approche existante dans la littérature. La dernière variante du TOP abordée dans cette thèse s'appelle le Set Orienteering Problem (SOP). Les clients dans cette variante sont regroupés en sous-ensembles appelés clusters. Un profit est associé à chaque groupe qui n'est obtenu que si au moins un client est desservi par le véhicule disponible. Nous avons proposé une méthode de coupes avec deux procédures de séparation pour séparer les contraintes d'élimination des sous-tours. Nous avons également proposé un algorithme Mémétique avec une procédure de découpage optimale calculée à l'aide de la programmation dynamique
The Vehicle Routing Problem (VRP) is a family of Combinatorial Optimization Problems generally used to solve different issues related to transportation systems and logistics. In this thesis, we focused our attention on a variant of the VRP called the Team Orienteering Problem (TOP). In this family of problems, it is a priory impossible to visit all the customers due to travel time limitation on vehicles. Instead, a profit is associated with each customer to represent its value and it is collected once the customer is visited by one of the available vehicles. The objective function is then to maximize the total collected profit with respect to the maximum travel time. Firstly, we introduced a new generalization for the TOP that we called the Clustered TOP (CluTOP). In this variant, the customers are grouped into subsets called clusters to which we associate profits. To solve this variant, we proposed an exact scheme based on the cutting plane approach with additional valid inequalities and pre-processing techniques. We also designed a heuristic method based on the order first-cluster second approach for the CluTOP. This Hybrid Heuristic combines between an ANLS heuristic that explores the solutions space and a splitting procedure that explores the giant tours search space. In addition, the splitting procedure is enhanced by local search procedure in order to enhance its coverage of search space. The second problem treated in this work is called the Synchronized Team Orienteering Problem with Time Windows (STOPTW). This variant was initially proposed in order to model scenarios related to asset protection during escaped wildfires. It considers the case of a heterogeneous fleet of vehicles along with time windows and synchronized visits. To solve this problem, we proposed a heuristic method based on the GRASP×ILS approach that led to a very outstanding results compared to the literature. The last variant of the TOP tackled in this thesis called the Set Orienteering Problem (SOP). Customers in this variant are grouped into subsets called clusters. Each cluster is associated with a profit which is gained if at least one customer is served by the single available vehicle. We proposed a Branch-and-Cut with two separation procedures to separate subtours elimination constraints. We also proposed a Memetic Algorithm with an optimal splitting procedure based on dynamic programming

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Marcos, Rebal, und Endrias Teklu. „ANALYSIS OF CASTING PROCESS FORCOMPLEX ELECTRONIC UNIT“. Thesis, Jönköping University, JTH, Mechanical Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-11545.

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Most aircraft component are currently being manufactured by machining, forging, welding and also assembling such parts. However, the possibilities of cutting cost from a single component has brought about a growing trend towards looking into casting as a possible option for manufacturing aircraft parts.

This thesis was done at the request of Saab Avitronics. It evaluates the possibilities of one aircraft part, a chassis for an electronic unit that was first designed to be machined from a blank, to be cast. The thesis goes through the multifaceted tasks of product development. Casting process selection, cast alloy selection as well as geometry modification were some of these tasks that were performed in this thesis. It also evaluates the performances of chosen casting processes, the design of gating systems as well as various process parameters set, by simulating the casting processes.

The alloy chosen was A356.0 with a T6 temper and the casting processes chosen were plaster mold casting and rheocasting. The geometry of the original chassis, which had very thin sections and undercuts which were complex to cast, was modified and made easier to cast with an acceptable slight increase of mass and size. The modification done on the geometry as well as the gating systems used had proven to be worthwhile, as the simulation of both process showed that such a part can be casted with no crucial defects foreseen. However, probable cavities might occur at the very tip of the chassis’s thin-fins – that it has for carrying away heat. Minor subsurface porosities might also be formed, which would not impair the function of the chassis. The modified chassis was made as close to as finished piece as possible, for the purpose of reducing machining costs. The cost of producing such a part by casting was also seen to be much less than machining it from blank. This could be taken as rationale for casting the chassis with thicker sections, to avoid problems that may arise in casting, and to subsequently machine these faces later, as it would still be cheaper than machining the chassis from a blank.

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Erturk, Cevher Levent. „A Layerwise Approach To Modeling Piezolaminated Plates“. Phd thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606340/index.pdf.

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In this thesis, optimal placement of adhesively bonded piezoelectric patches on laminated plates and the determination of geometry of the bonding area to maximize actuation effect are studied. A new finite element model, in which each layer is considered to be a separate plate, is developed. The adhesive layer is modeled as a distributed spring system. In this way, relative transverse normal and shear motion of the layers are allowed. Effect of delamination on the adhesive layer stresses is also studied and investigated through several case studies. Optimization problems, having single and multiple objectives, are investigated for both actuator placement and selective bonding examples. In these case studies, 2D and 3D Pareto fronts are also obtained. &
#8216
Hide and Seek Simulated Annealing&
#8217
method is adapted for discrete problems and used as the optimization technique for single-objective problems. Finally, Multiple Cooling Multi Objective Simulated Annealing optimization algorithm is adapted and used in multi-objective optimization case studies.

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Stevenson, Clint W. „A Logistic Regression Analysis of Utah Colleges Exit Poll Response Rates Using SAS Software“. BYU ScholarsArchive, 2006. https://scholarsarchive.byu.edu/etd/1116.

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In this study I examine voter response at an interview level using a dataset of 7562 voter contacts (including responses and nonresponses) in the 2004 Utah Colleges Exit Poll. In 2004, 4908 of the 7562 voters approached responded to the exit poll for an overall response rate of 65 percent. Logistic regression is used to estimate factors that contribute to a success or failure of each interview attempt. This logistic regression model uses interviewer characteristics, voter characteristics (both respondents and nonrespondents), and exogenous factors as independent variables. Voter characteristics such as race, gender, and age are strongly associated with response. An interviewer's prior retail sales experience is associated with whether a voter will decide to respond to a questionnaire or not. The only exogenous factor that is associated with voter response is whether the interview occurred in the morning or afternoon.

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Silva, Neto Valdemir Praxedes da. „Caracteriza??o de circuitos planares de micro-ondas pelo m?todo iterativo das ondas“. Universidade Federal do Rio Grande do Norte, 2013. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15480.

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Made available in DSpace on 2014-12-17T14:56:15Z (GMT). No. of bitstreams: 1 ValdemirPSN_DISSERT.pdf: 1834625 bytes, checksum: 95e248e92979a128a6b21a87f73fdd48 (MD5) Previous issue date: 2013-07-26
The planar circuits are structures that increasingly attracting the attention of researchers, due the good performance and capacity to integrate with other devices, in the prototyping of systems for transmitting and receiving signals in the microwave range. In this context, the study and development of new techniques for analysis of these devices have significantly contributed in the design of structures with excellent performance and high reliability. In this work, the full-wave method based on the concept of electromagnetic waves and the principle of reflection and transmission of waves at an interface, Wave Concept Iterative Procedure (WCIP), or iterative method of waves is described as a tool with high precision study microwave planar circuits. The proposed method is applied to the characterization of planar filters, microstrip antennas and frequency selective surfaces. Prototype devices were built and the experimental results confirmed the proposed mathematical model. The results were also compared with simulated results by Ansoft HFSS, observing a good agreement between them.
Os circuitos planares s?o estruturas que atraem cada vez mais a aten??o dos pesquisadores, pelo bom desempenho e pela capacidade de integra??o com outros dispositivos, na prototipagem de sistemas de transmiss?o e recep??o de sinais na faixa de micro-ondas. Neste contexto, o estudo e o desenvolvimento de novas t?cnicas de an?lise desses dispositivos t?m contribu?do de forma significativa na concep??o de estruturas com desempenhos excelentes e alto grau de confiabilidade. Neste trabalho, o m?todo de onda completa baseado no conceito de ondas eletromagn?ticas e no princ?pio da reflex?o e transmiss?o de ondas em uma interface, Wave Concept Iterative Procedure (WCIP), ou m?todo iterativo das ondas ? descrito como uma ferramenta com alto grau de precis?o no estudo de circuitos planares de micro-ondas. O m?todo proposto ? aplicado na caracteriza??o de filtros planares, antenas de microfita e superf?cies seletivas de frequ?ncia. Prot?tipos dos dispositivos foram constru?dos e os resultados experimentais comprovaram o modelo matem?tico proposto. Os resultados obtidos tamb?m foram comparados com os resultados simulados pelo Ansoft HFSS, tendo sido observada uma boa concord?ncia entre eles

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Almeida, Filho Valdez Arag?o de. „Aplica??o de superf?cies seletivas em frequ?ncia para melhoria de resposta de arranjos de antenas planares“. Universidade Federal do Rio Grande do Norte, 2014. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15252.

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Made available in DSpace on 2014-12-17T14:55:20Z (GMT). No. of bitstreams: 1 ValdezAAF_TESE.pdf: 2001050 bytes, checksum: d0f0b88178102c3f48880303c1c6d765 (MD5) Previous issue date: 2014-03-12
Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior
This work aims to show how the application of frequency selective surfaces (FSS) in planar antenna arrays become an alternative to obtain desired radiation characteristics from changes in radiation parameters of the arrays, such as bandwidth, gain and directivity. In addition to analyzing these parameters is also made a study of the mutual coupling between the elements of the array. To accomplish this study, were designed a microstrip antenna array with two patch elements, fed by a network feed. Another change made in the array was the use of the truncated ground plane, with the objective of increasing the bandwidth and miniaturize the elements of the array. In order to study the behavior of frequency selective surfaces applied in antenna arrays, three different layouts were proposed. The first layout uses the FSS as a superstrate (above the array). The second layout uses the FSS as reflector element (below the array). The third layout is placed between two FSS. Numerical and experimental results for each of the proposed configurations are presented in order to validate the research
Este trabalho tem como objetivo apresentar como a aplica??o de superf?cies seletivas em frequ?ncia (FSS) em arranjos de antenas planares se torna uma alternativa interessante para se obter caracter?sticas de radia??o desejadas, a partir de altera??es em par?metros de radia??o dos arranjos, tais como largura de banda, ganho e diretividade. Al?m de analisar esses par?metros, tamb?m ? feito o estudo do acoplamento m?tuo entre os elementos do arranjo. Para realizar tal estudo, foi projetado um arranjo de antenas de microfita, com dois elementos do tipo patch, alimentado por uma rede de alimenta??o. Outra modifica??o feita no arranjo foi a utiliza??o do plano de terra truncado, com o objetivo de aumentar a largura de banda e miniaturizar os elementos do arranjo. Para poder estudar o comportamento das superf?cies seletivas em frequ?ncia aplicadas em arranjos de antenas, foram propostos tr?s layouts diferentes. O primeiro layout consiste em utilizar a FSS como superstrato (acima do arranjo). O segundo consiste em utilizar a FSS como elemento refletor (abaixo do arranjo). O terceiro layout consiste em colocar o arranjo entre duas camadas de FSS, tanto em cima quanto abaixo. Resultados num?ricos e experimentais para cada uma das configura??es propostas s?o apresentados

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GUAN, DAI-YUAN, und 官大元. „Research and Comparison of International and Domestic Professional Scouting Player Selection“. Thesis, 2019. http://ndltd.ncl.edu.tw/handle/8dcug6.

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碩士
大葉大學
運動健康管理學系
107
The purpose of this study is to understand whether there is a difference in the process of material selection assessment between domestic and foreign baseball players. This study designed qualitative research to invite two Chinese professional baseball league scouts and one US Major League Baseball scout to collect data through semi-structured interviews to understand the actual work situation and content. From the results of this study, we can know that both domestic and foreign scouts pay attention to the pitcher's ability of liner ball, the pitching mechanism, the ability to control the ball, the base running speed of the batter, the batting ability, and the fielding sense of the infield. The seven items above were taken in the draft among which the subjective assessment includes five conditions including the pitcher's body and health, the pitching mechanism, the ability of pitching control, the batting ability and the fielding sense of the infield. The objective criteria are measured by the pitcher's ability of liner ball and the base running speed of the batter. From the study results, we know that both domestic and foreign scouts rely on subjective assessments in the draft of players. It is recommended that future scouting work be combined with baseball science research. For example, built the existing data and the objective data collected in the future into the database, and then analyzing the big data to find the appropriate indicators with practical significance and predictability to avoid the scouts' personal experience and preferences that influencing the draft of players. In addition, the psychological science, social sciences, social work and other perspectives can be used to evaluate the player's psychological resilience, so that the scouts can have more evaluated methods with objectivity and systematization.

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37

Li, Chiuan-Luen, und 李權倫. „The Effect of Online Game Player’ Motivation on Selection of Celebrity Character“. Thesis, 2013. http://ndltd.ncl.edu.tw/handle/44110754853833412705.

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碩士
中國文化大學
國際貿易學系
100
This research proposes that celebrity character and non-celebrity character have different interpersonal attraction and online game player’s motivation can influence player’s select celebrity character.This study conducted an experiment and recruited 342 volunteers. Results reveal that celebrity character’s interpersonal attraction higher than non-celebrity character, social motivation player are most select celebrity character than achievement motivation player and immersion motivation player.

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38

Dixon, Jess C. „Exploring the impact of top management team composition on player selection in Major League Baseball“. 2007. https://scholarworks.umass.edu/dissertations/AAI3289219.

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Originally conceptualized by Hambrick and Mason (1984), the upper echelons perspective (UEP) has become a dominant theme in the study of strategic decision making across a great number of disciplines. Over the past two decades, the work of these authors has been cited in over 500 refereed journal publications, lending credence to the applicability of the UEP when studying top management teams (TMTs) (Carpenter, 2005; Carpenter, Geletkanycz, & Sanders, 2004). To compensate for shortcomings in accessibility and instrumentation, the UEP uses demographic variables as proxies for the underlying psychological constructs that shape TMTs' interpretations of business situations in formulating and implementing appropriate strategic alternatives (Cannella & Holcomb, 2005a; Carpenter et al., 2004). In the context of Major League Baseball (MLB), the selection and development of player resources are critical to organizational performance (Olson & Schwab, 2000). Perhaps more than any other professional sport, the selection of MLB player talent is amenable to influence by the decision making of clubs' front office executives. Policies and decisions regarding whom to scout, whom to draft, whom to promote, whom to demote, whom to acquire, whom to trade away, whom to play in which positions, and whom to hit in which slot in the batting line-up are all elements that are managed to some degree by the club's TMT (Gamson & Scotch, 1964). Consistent with the UEP, it was believed that the cognitions, values and perceptions of MLB TMT members, along with their undeniable influence on the process of strategic choice, would be associated with significant player selection outcomes. Drawing upon theory and literature related to the UEP, the researcher employed fixed-effects regression models to explore the effects of TMT composition on the quality of player selection in MLB between 1990 and 2002. Using a linear run estimation model of offensive performance called Extrapolated Runs Basic (Furtado, 1999) as the basis for measuring player selection quality, the findings from this study suggested that basic TMT characteristics had a limited capacity to affect the overall quality of player selection decisions in MLB between 1990 and 2002. Specifically, the overall regression results suggested that these variables cumulatively accounted for between 2.5% and 3% of the variance in the offensive run productivity of players that were promoted to major league rosters during this time period. Furthermore, the results suggested that the longer TMT members worked together, and the more highly-educated they were, the better they were at making player selection decisions. Taken together, these findings have considerable implications for both theory and practice.

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Li, Hsin-Yun, und 李馨芸. „A Research on the Optimal Selection and Training of the College Women's Basketball Player in Taiwan“. Thesis, 2014. http://ndltd.ncl.edu.tw/handle/17243037687047973097.

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碩士
亞東技術學院
運籌管理研究所
102
The main purposes of this study were to used ergonomically method and build the optimal model of personnel selection and training items for our college women's basketball players in professional and technical positions with different offensive and defensive characteristics. The results of this study can provide a reference of player’s selection and training as well as upgrade overall team’s level for college women's basketball. This study collected 130 the college women's basketball players(including the twenty-three of point guards, twenty-six of shooting guards, thirty-five of small forward, thirty-one of power forward, fifteen of center) of 11 teams of the 1st grade in University Basketball Association(UBA). All the measurements are processed based on the standard by the human factor (Ergonomics) method and International Society of Advancement of Kinanthropometry (ISAK). Anthropometric items in this study, Include age, height, weight, anthropometric length, width, girth, skin fold and body components. The collected data were analyzed by using SPSS 12.0 for windows software package. The conclusions of this research are summarized as following： 1. The height, weight, arm span, sitting length, hand length, upper arm length, length of upper extremity，foot length, thigh length, leg length of players make a significant difference between different positions. 2. The shoulder, pelvic, chest circumference, abdominal circumference, hip circumference, calf circumference of players has significant difference between different positions. 3. The triceps, biceps skin fold of players had significant difference between different positions. 4. The height, weight was positive correlation between arm span, upper arm length, length of upper extremity， thigh length, leg length. 5. The height, weight was positive correlation between shoulder, pelvic, chest circumferences. 6. The assistance, turn-over, defensive rebound, offensive rebound, average rebounds of players had significant difference between different positions.

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CHENG, SHIH-CHIEH, und 鄭仕捷. „The selection model construction of special physical agility to different positions for excellent college men soccer player“. Thesis, 2017. http://ndltd.ncl.edu.tw/handle/n969cb.

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碩士
輔仁大學
體育學系碩士在職專班
105
The aim of this study is to selection model construction of special physical agility to different positions for internal excellent college men soccer player. By the 20 members men's soccer team of university of Taipei, conduct special physical fitness test of the different positions (striker, midfielder, full back, gatekeeper) of football players. Respectively, vertical jump, standing long jump, one minute sit-ups, Z-shaped quick run, 15 meters spurt, 30 meters back to run, 12 minutes run 7 items. According to the data obtained from the special physical examination, descriptive statistical performance, and then the single factor variance analysis to inspect the difference, if achieve the significant then afterward the comparison to test the difference by scheffe method, and its percentage as a build the assessment of the physical fitness of the standard. the research represent: 1.In the special physical test, there are five significant differences(p<﹒05), respectively, for the vertical jump, standing long jump, 30 feet back to run, Z-shaped quick run, 12 minutes to run. 2.The study found that different positions of players, the physical quality of the differences are required, the striker is the speed ability, speed ability, agility project; midfield is aerobic endurance capacity of the project; guard belongs to the speed of endurance project; goalkeeper is explosive power, Instantaneous force project. 3.The selection of football players will also be included in the height of one of the considerations, but the height is not the most important factors affecting the performance of players. Height may affect the game position, but will not affect the player to be successful.

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Shih-Chin, Lee. „Selection Behavior of Taiwan Lotto Players“. 2006. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-2507200601073000.

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42

Lee, Shih-Chin, und 李世欽. „Selection Behavior of Taiwan Lotto Players“. Thesis, 2006. http://ndltd.ncl.edu.tw/handle/65213739565541327012.

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博士
國立臺灣大學
財務金融學研究所
94
Although lotto games are better suited for testing the nature of human rationality than stock markets or laboratory designs in experimental psychology, insufficient attention has been given to the quantitative analysis of the lotto players’ behavior. This may be due to the fact that analyzing the behavior of lotto participants requires the exact frequencies of numbers chosen by the players and, unfortunately, lottery operators seldom release such data. The most well-known cognitive bias exhibited by lotto players is the gambler’s fallacy, which infers that people underestimate the repetition of recent signals from a random binary series. In the first part, we introduce a method that enables us to test whether the numbers drawn in the past have any impact on the players’ selection of numbers without using the exact distribution of the numbers chosen. We apply this method to the Taiwan 6/42 lotto game and obtain two main findings. First, we show that the short horizon betting behavior of Taiwan lotto players is strongly consistent with the gambler’s fallacy. Second, consistent with the notion of Type II gambler’s fallacy (Keren and Lewis, 1994), these same players tend to pick those numbers that have been drawn most frequently in the past. The gambler’s fallacy can be explained by the representativeness heuristic, while the type II gambler’s fallacy in number selection may be resulted by the availability heuristic, since winning numbers with higher occurrence rates come to mind more easily than those with low occurrence frequencies. Our finding is the first in the literature that presents statistically significant evidence of lotto players falling in two types of fallacies both. The purpose of the second part is to study the behavior of the Taiwan lotto players by developing various dynamic regression models. The data collected for our analysis are accurate and precise since we exhaust a large database of lotto players choices of the number combinations maintained by the only lottery operator in Taiwan. There are three main results in this study. First, the gambler’s fallacy temporarily influences players’ selection of lotto numbers. Second, such negative influence can be partially offset by picking the numbers that appeared more frequently in the past.　Third, the players using the system bet strategy have more misconceptions about random processes than the players using the ordinary bet strategy. The first two findings are related to Rabin and Vayanos (2005) model, which states that people judge the performance of a signal depending not only on the luck with reversals, but also on the underlying state with persistence.

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Chan, Tzu-Ching, und 鄭子敬. „AN ANALYSIS IN SELECTING BEGINNING VOLLEYBALL PLAYER“. Thesis, 2005. http://ndltd.ncl.edu.tw/handle/88398876741596146642.

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碩士
國立臺灣體育學院
體育研究所
93
The purpose of this study was to investigate the differences of selection policies for beginning volleyball players and the competition system between Taiwan and China. Through systematic literature reviews, this study discussed the methods that Chinese volleyball coaches presently used for selecting new players. The results indicated that (1) body figures, physical condition, and psychological status are the most emphasized phrases when selecting new players. (2) In the last ten years, tests of gene and bone age were the most effective scientific approaches used while selecting. In 1992, China designed a CHN form, an evaluation standard for examining bone age, and also developed a system which could automatically evaluate players’ bone age through X-ray films. Bone-age-based Selection of beginning volleyball players prevents subjective decisions for young players and helps saving the training resource. (3) The insufficiency of professional coach lowers the qualities of training and selection.84.5% of coaches teaching in the fundamental level were also school teachers, and 52.1% of them did not possess any qualification for coaching. The unbalance between coaching and teaching might diminish the efficiency and effectiveness of training.

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HU, CHIA-SEN, und 胡嘉森. „Study on Weights of Talent Selection Indicators of Badminton Players by AHP“. Thesis, 2014. http://ndltd.ncl.edu.tw/handle/61795977235040452438.

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碩士
育達科技大學
資訊管理所
102
This study aims to clarify the selection standard for potential badminton players and intends to construct an evaluation model the selection of badminton players. Through literature review and the Delphi Method, this study establishes the selection standard for badminton team players: physical patterns, physical quality, physical functions, psychological qualities, and intellectual level, including 22 indicators. The researcher then investigates the coaches of several schools with effective badminton training in Taiwan, as well as professional badminton coaches. By the Analytic Hierarchy process (AHP), this study analyzes the importance of indicators for badminton coaches to select potential badminton team players. It successfully constructs a model of badminton talent selection, and the findings can serve as scientific and objective reference for badminton coaches to select the players in order to cultivate prominent and potential badminton talents.

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Chen, Chun-Feng, und 陳俊峰. „The Research on Physical Selection of the Elementary School Male Volleyball Players“. Thesis, 2011. http://ndltd.ncl.edu.tw/handle/26284661521119615038.

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碩士
國立東華大學
體育與運動科學系
99
Abstract The purpose of the research was to effectively screen the phenotypes of physical items in volleyball sports through the development of physical fitness on volleyball sports. After analyzing the fitness performance of elementary school male players at different positions as major attacker, minor attacker, setter player, significant test items were chosen to develop the multiple regression equation of physical fitness. The subjects were 60 male six graders from the teams ranked top 6 in the national volleyball championship of elementary schools in 2010. There were 3 significant differences in 16 volleyball physical fitness tests, belonging to the "vertical jumping " , "run-up jump touch" and "800-meters run and go ". In the "vertical jump " and "run-up jump touch ", both of them the major attackers were better than the minor attackers all the time, test scores were significant differences (p<.05). In addition, endurance capacity factors were "800-meter run away", setter players and major attackers were better than the minor attackers, test scores were significant differences (p<.05) , the remaining 13 test items were no significant differences. There were no uniform standards and specifications about domestic primary selection of volleyball (physical), the most selection reference method was according to the training experiences of the coach. Because the practice time of the elementary school volleyball children was short, in the short period of time to master the technology sophisticated and effective, a prerequisite was the need to have excellent physical fitness. Through this study: there were three representative predictors of elementary school volleyball physical : "vertical jump ", "5.5 meters four horizontal movement" and "basketball throw". The regression equation was the formula : " ZC＝0.305X13＋0.386 X2 －0.242X6".The results showed that the election of three physical ability test items, for the comprehensiveness of the technical movements to play volleyball, should have a positive and substantial impact, but also the important indicator in primary physical fitness selection of volleyball players in the future.

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46

Frerking, Brian Christopher. „Analysis of factors influencing college selection by prospective elite high school basketball players“. 2002. http://www.oregonpdf.org.

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47

WANG, TONG-HSIN, und 王同心. „Investigate Factors for Selection Volleyball Talent Players in Elementary School by Delphi Technique“. Thesis, 2016. http://ndltd.ncl.edu.tw/handle/65748214774545798611.

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碩士
真理大學
企業管理學系碩士班
104
A player selecting mechanism is the most important factor of geting good grades for Elementary School player. Selecting talent player and long term practace is the most effective method to increase the National Volleyball Team’s Competitive.This Study use Delphi Technique and Documentary Analysis as the Research Method.We try to build a scientific model for selecting talent player to Basic-level volleyballcoach.

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Teng, Ya Wen, und 鄧雅文. „Selecting the best group of players for a composite competition“. Thesis, 2010. http://ndltd.ncl.edu.tw/handle/60517334570786320171.

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碩士
國立政治大學
資訊科學學系
98
In a large database, top-k query is an important mechanism to retrieve the most valuable information for the users. It ranks data objects with a ranking function and reports the k objects with the highest scores. However, when an object has multiple scores, how to rank objects without information loss becomes challenging. In this paper, we model the object with multiple scores as an uncertain data object and the uncertainty of the object as a distribution of the scores, and consider a novel problem named Best-kGROUP query. Imagine the following scenario. Assume there is a composite competition consisting of several games each of which requires a distinct number of players. Suppose the largest number is k, and we want to select the best group of k players from all the players for the competition. A group x is considered better than another group y if x has higher aggregated probability to be the top ones in more games than y. In order to speed up the selection process, the groups worse than another group definitely should first be discarded. We identify these groups using a dynamic programming based approach and a filtering algorithm. The remaining groups with the property that none of them have higher aggregated probability to be the top ones for all games against the other groups are called skyline groups. From these skyline groups, we can easily compare them to select the best group for the composite competition. The experiments show that our approach outperforms the other approaches in selecting the best group to defeat the other groups in the composite competitions.

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Tsai, Ching-Feng, und 蔡慶鋒. „Players Selecting Online Games By Using Fuzzy Multi Criteria Methods“. Thesis, 2010. http://ndltd.ncl.edu.tw/handle/56381175897571907057.

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碩士
雲林科技大學
資訊管理系碩士班
98
With the prevalence and development of Internet, online games have become a popular industry at present. Various types of games are available in the market, and online game companies are continuing to develop new games. The online games market in Taiwan is also very mature. With advanced technology, more people play online games and treat them as one of the online entertainments. At present, most online games are developed by foreign companies, thus, the agents in Taiwan are not authorized to change or enhance the content, structure and display of the games. The support and enhancement from the agents in Taiwan for the players are service quality, system quality and information content. Therefore, this study focuses on the online game players how to selection of online games, e.g. game design elements （animation, sound, etc. ） and information systems（system quality, information quality, service quality) of players’ selection of online game by Fuzzy Multiple Criteria method. The findings can serve as reference to the operation of online game companies in Taiwan.

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Zetu, Alina Gabriela. „Neurophysiological differences in visual selective attention in action video-games players“. 2007. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=788933&T=F.

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