scholarly journals Dlouhodobé sledování úrovně výkonnostních předpokladů vybraných tenistů

2014 ◽  
Vol 8 (1) ◽  
pp. 35-42
Author(s):  
Michal Polách ◽  
Jiří Zháněl ◽  
Ondřej Hubáček
Keyword(s):  
High Performance ◽  
Sport Performance ◽  
Statistical Dependence ◽  
Tennis Players ◽  
Individual Variables ◽  
The Individual ◽  
High Level ◽  
The Relationship ◽  
Game Performance

Monitoring the level of individual factors or performance predispositions is an essential part of athlete´s training process. The article discusses the results of the diagnostic performance predispositions research of the selected group of tennis players. In the research, we first made a selection of players according to the criterion of the frequency of participation in testing and the other criterion was the performance level, ranking, they reached. In the next phase, we analyzed the individual test results of the players in the long-term perspective. The final step was to assess the relationship between age, the results of the test battery and game performance. Due to the small number of measurements and the complexity of sport performance in tennis we did not expect very tight dependence (correlation) of individual variables. We came to the conclusion that by all observed players a high level of motor performance predisposition were recorded which corresponds with their high performance in tennis and ranking, although statistical dependence was not proven.

scholarly journals Long Term Interactions of Native and Invasive Species in a Marine Protected Area Suggest Complex Cascading Effects Challenging Conservation Outcomes

Diversity ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 71
Author(s):  
Charalampos Dimitriadis ◽  
Ivoni Fournari-Konstantinidou ◽  
Laurent Sourbès ◽  
Drosos Koutsoubas ◽  
Stelios Katsanevakis
Keyword(s):  
Invasive Species ◽  
Native Species ◽  
High Performance ◽  
Marine Protected Area ◽  
Habitat Degradation ◽  
Population Increase ◽  
Rocky Reef ◽  
Cascading Effects ◽  
High Level

Understanding the interactions among invasive species, native species and marine protected areas (MPAs), and the long-term regime shifts in MPAs is receiving increased attention, since biological invasions can alter the structure and functioning of the protected ecosystems and challenge conservation efforts. Here we found evidence of marked modifications in the rocky reef associated biota in a Mediterranean MPA from 2009 to 2019 through visual census surveys, due to the presence of invasive species altering the structure of the ecosystem and triggering complex cascading effects on the long term. Low levels of the populations of native high-level predators were accompanied by the population increase and high performance of both native and invasive fish herbivores. Subsequently the overgrazing and habitat degradation resulted in cascading effects towards the diminishing of the native and invasive invertebrate grazers and omnivorous benthic species. Our study represents a good showcase of how invasive species can coexist or exclude native biota and at the same time regulate or out-compete other established invaders and native species.

scholarly journals Eight Simple Guidelines for Improved Understanding of Transformations and Nonlinear Effects

2021 ◽  
pp. 109442812199190
Author(s):  
Mikko Rönkkö ◽  
Eero Aalto ◽  
Henni Tenhunen ◽  
Miguel I. Aguirre-Urreta
Keyword(s):  
Generalized Linear Model ◽  
Functional Form ◽  
Nonlinear Models ◽  
Nonlinear Effects ◽  
Recent Past ◽  
Organizational Research ◽  
Common Practices ◽  
Individual Variables ◽  
The Individual ◽  
The Relationship

Transforming variables before analysis or applying a transformation as a part of a generalized linear model are common practices in organizational research. Several methodological articles addressing the topic, either directly or indirectly, have been published in the recent past. In this article, we point out a few misconceptions about transformations and propose a set of eight simple guidelines for addressing them. Our main argument is that transformations should not be chosen based on the nature or distribution of the individual variables but based on the functional form of the relationship between two or more variables that is expected from theory or discovered empirically. Building on a systematic review of six leading management journals, we point to several ways the specification and interpretation of nonlinear models can be improved.

LAX-Score

2021 ◽  
Vol 5 (3) ◽  
pp. 1-28
Author(s):  
Woosub Jung ◽  
Amanda Watson ◽  
Scott Kuehn ◽  
Erik Korem ◽  
Ken Koltermann ◽  
...  
Keyword(s):  
Ncaa Division I ◽  
Athletic Performance ◽  
High Performance ◽  
Performance Enhancement ◽  
Ground Truth ◽  
Division I ◽  
Sports Science ◽  
Player Performance ◽  
The Relationship ◽  
Game Performance

For the past several decades, machine learning has played an important role in sports science with regard to player performance and result prediction. However, it is still challenging to quantify team-level game performance because there is no strong ground truth. Thus, a team cannot receive feedback in a standardized way. The aim of this study was twofold. First, we designed a metric called LAX-Score to quantify a collegiate lacrosse team's athletic performance. Next, we explored the relationship between our proposed metric and practice sensing features for performance enhancement. To derive the metric, we utilized feature selection and weighted regression. Then, the proposed metric was statistically validated on over 700 games from the last three seasons of NCAA Division I women's lacrosse. We also explored our biometric sensing dataset obtained from a collegiate team's athletes over the course of a season. We then identified the practice features that are most correlated with high-performance games. Our results indicate that LAX-Score provides insight into athletic performance beyond wins and losses. Moreover, though COVID-19 has stalled implementation, the collegiate team studied applied our feature outcomes to their practices, and the initial results look promising with regard to better performance.

The Relationship between Observable Self-Talk and Competitive Junior Tennis Players' Match Performances

1994 ◽  
Vol 16 (4) ◽  
pp. 400-415 ◽  
Author(s):  
Judy L. Van Raalte ◽  
Britten W. Brewer ◽  
Patricia M. Rivera ◽  
Albert J. Petitpas
Keyword(s):  
Sport Psychology ◽  
Descriptive Analysis ◽  
Sport Performance ◽  
Cognitive Factors ◽  
Competitive Sport ◽  
Tennis Players ◽  
Self Talk ◽  
Junior Tennis ◽  
The Relationship ◽  
Broad Interest

In sport psychology, there is broad interest in cognitive factors that affect sport performance. The purpose of this research was to examine one such factor, self-talk, in competitive sport performance. Twenty-four junior tennis players were observed during tournament matches. Their observable self-talk, gestures, and match scores were recorded. Players also described their positive, negative, and other thoughts on a postmatch questionnaire. A descriptive analysis of the self-talk and gestures that occurred during competition was generated. It was found that negative self-talk was associated with losing and that players who reported believing in the utility of self-talk won more points than players who did not. These results suggest that self-talk influences competitive sport outcomes. The importance of "believing" in self-talk and the potential motivational and detrimental effects of negative self-talk on performance are discussed.

Strategic orientations, knowledge management (KM) and business performance

Kybernetes ◽  
2019 ◽  
Vol 48 (9) ◽  
pp. 1942-1964 ◽  
Author(s):  
Mona Jami Pour ◽  
Mohammad Asarian
Keyword(s):  
Cluster Analysis ◽  
Knowledge Management ◽  
Business Performance ◽  
High Performance ◽  
Strategic Orientation ◽  
Content Type ◽  
Strategic Orientations ◽  
Strategy Performance ◽  
High Level ◽  
The Relationship

Purpose Despite the huge amount of studies that have investigated the strategy–performance relationships and knowledge management (KM)–performance relationships, there is little consensus regarding the nature of these connections. By reviewing related literature, some notable limitations and inconsistent results are highlighted in extant studies. To address these challenges, this study aims to explore the effects of strategic orientation and KM mechanisms on business performance. Design/methodology/approach The study conducted an empirical investigation of 227 small- and medium-sized enterprises (SMEs) to explore the relationship between strategy−performance and KM−performance. Business strategy is conceptualized as a comparative construct with six dimensions, KM is conceptualized by two types of KM mechanisms of technical and non-technical KM mechanisms and business performance is measured by four dimensions of balanced scorecard (BSC). The cluster analysis was used to explore different aspects of these three constructs. Findings Using cluster analysis, the results indicate that firms with high level of analysis, defensiveness, futurity and proactiveness in strategic orientation have better performance and also the high level of both KM mechanisms another important finding shows that firms with more KM mechanisms have high performance and technical mechanisms have more predictor role on performance. Practical implications This research also has prescriptive implications for strategic managers and KM practitioners. The finding enhanced the understanding of the relationship between strategic orientations, KM and performance. The results assist managers to assess business performance regarding strategic orientations and KM mechanisms of the firms. Therefore, it helps firms to improve strategic resource allocation and exploit KM investment by considering ideal pattern of the performance. Originality/value By reviewing strategic management and KM literature, it is revealed that there are little studies about how the interaction of strategic orientation and KM influences business performance. The main contribution of the study is exploring the profile of the firms by considering their strategic orientation and KM mechanisms and their impact on business performance. This study provides an empirical evidence about interaction of strategic orientations, KM mechanisms and business performance in SME context, which is merely investigated in previous researches.

Ostatni będą pierwszymi? LNG w polityce energetycznej Rosji

2020 ◽  
Vol 18 (4) ◽  
pp. 97-120
Author(s):  
Szymon Kardaś
Keyword(s):  
Energy Markets ◽  
The State ◽  
External Energy ◽  
State Budget ◽  
Russian State ◽  
Internal Structures ◽  
Constant State ◽  
High Level ◽  
The Relationship

The purpose of the article is to analyze the current condition and development prospects for the Russian LNG sector. Taking into account the specifics of the functioning of the Russian state, the author chose the realistic paradigm (neoclassical realism), which is useful in the context of showing the relationship between internal structures and external activity of the state. The author argues that Russian expansion in the LNG sector is the result of the lobbying capacity of Novatek – the largest private gas producer in Russia. Although the state budget incurs significant costs related to the implementation of Novatek projects, in particular due to fiscal preferences, it also achieves the possibility of achieving the objectives in external and internal energy policy. Novatek’s expansion increases Russia’s share in external energy markets; at the same time LNG expansion, it is used for internal purposes. Novatek’s dominant position in the LNG sector is confirmed by both already implemented projects and plans for further expansion. The factors favoring Russian expansion are constant state support for Novatek projects, high level of internationalization of implemented projects and favorable forecasts on energy markets. The strong competition between currently dominant LNG producers and the risk of internal competition between Russian exporters are among the key long-term challenges.

scholarly journals Phillips Curve: The Greek Case

2020 ◽  
pp. 1-18
Author(s):  
Panagiotis Liargovas ◽  
Marios Psychalis
Keyword(s):  
Phillips Curve ◽  
Ordinary Least Squares ◽  
Economic Adjustment ◽  
Factors Affecting ◽  
The Past ◽  
Greek Economy ◽  
Classical Economic ◽  
High Level ◽  
The Relationship

One of the most important problems facing Greece is the long-term and high-level unemployment rate. The Economic Adjustment Programmes (EAPs) focused on the supply side of the economy, aiming at the adjustment of prices and wages, draw on the classical economic model, as it is widely accepted that internal devaluation policies keep inflation low. This article attempts to examine whether the Keynesian theory and the Phillips Curve, which shows the relationship between unemployment and inflation, apply in the case of the Greek economy. We use descriptive statistics, ordinary least squares (OLS) and VAR Analysis to examine the relationship between the variables. According to the results, there is a negative correlation between unemployment and inflation in Greece, thus confirming the Phillips Curve hypothesis. Finally, results show that unemployment is less dependent on inflation compared with the past, and there are numerous other decisive factors affecting unemployment.

scholarly journals The relationship between organisational culture and financial performance: Some South African evidence

1998 ◽  
Vol 29 (1) ◽  
pp. 30-40 ◽  
Author(s):  
W. Z. Van Der Post ◽  
T. J. De Coning ◽  
E. V.D.M. Smit
Keyword(s):  
Financial Performance ◽  
South African ◽  
Corporate Culture ◽  
Organisational Culture ◽  
Managerial Values ◽  
Beliefs And Values ◽  
The Individual ◽  
The Relationship ◽  
And Task

Although statistical evidence seems to be lacking. it is at present widely acknowledged that organisational culture has the potential of having a significant effect on organisational performance. An analysis of sustained superior financial performance of certain American organisations has attributed their success to the culture that each of them had developed. It has been proposed that these organisations are characterised by a strong set of core managerial values that define the ways in which they conduct business. how they treat employees, customers, suppliers and others. Culture is to the organisation what personality is to the individual. It is a hidden but unifying force that provides meaning and direction and has been defined as the prevailing background fabric of prescriptions and proscriptions for behaviour, the system of beliefs and values and the technology and task of the organisation together with the accepted approaches to these. Recent studies have indicated that corporate culture has an impact on a firm's long-term financial performance: that corporate culture will probably be an even more important factor in determining the success or failure of firms in the next decade; that corporate cultures that inhibit long-term financial performance are not rare and that they develop easily. even in firms that are staffed by reasonable and intelligent people; and that corporate cultures, although difficult to change, can be made more performance enhancing. The purpose of this study, therefore, was to establish the statistical relationship between organisational culture and financial performance.

Farmers' attitudes towards sustainable agriculture issues and environmental quality in a selected area of Bangladesh

1999 ◽  
Vol 14 (1) ◽  
pp. 22-29 ◽  
Author(s):  
M. Z. Rahman ◽  
H. Mikuni
Keyword(s):  
Agricultural Development ◽  
Management Practices ◽  
Productivity Loss ◽  
Favorable Attitude ◽  
Agricultural Technologies ◽  
Aquatic Life ◽  
The Government ◽  
The Individual ◽  
High Level

AbstractThe sustainability issues associated with agricultural development are a growing concern worldwide. This study focussed on farmers' attitudes about environmental degradation and long term productivity loss that may result from implementation of modern agricultural technologies. The study was conducted in a selected area of Bangladesh and field level data were collected from the sampled farmers through personal interviewing. Findings revealed that more than two-thirds of the farmers confronted either a medium or high level of environmental problems due to intensive cultivation. Their main concerns were stress on soil fertility, loss of essential aquatic life, and reduction of earthworms and other beneficial organisms in soil. The farmers' recommended solutions were production of high yielding crop varieties with conservation management practices, and the balanced use of chemical fertilizers and organic manures. To apply these techniques, the top expectation of the farmers was to receive subsidies for agricultural inputs, and get easy-term credit from the government or non-government organizations. Interestingly, just half the farmers in the study area possessed a less than favorable attitude towards sustainability issues of agricultural development. In other words, to them these issues were of low or marginal priority. Only 6% of them expressed a highly favorable attitude (high priority) and 44% expressed a moderate attitude. Based on correlations, the individual farmer's age, education, family size, organizational participation, television exposure, communication behavior and environmental problem confrontation were identified as the main determinants of their attitudes about sustainability issues. Hence, these factors should be considered when formulating programs and policies for agriculture development that aim for long-term sustainability.

Effects of Individuals' Motivations on Communications in Online Health Forums

2016 ◽  
Vol 44 (2) ◽  
pp. 299-312 ◽  
Author(s):  
Bing Wu ◽  
Shan Jiang ◽  
Hsinchun Chen
Keyword(s):  
Random Graph ◽  
Information Diffusion ◽  
Positive Impact ◽  
Relationship Building ◽  
Online Activity ◽  
Health Networks ◽  
Exponential Random Graph ◽  
The Individual ◽  
High Level ◽  
The Relationship

Our aim was to analyze the effects of individuals' motivations, specifically reciprocity, experience, activity, and emotion, on their communications in an online health forum. We employed an exponential random graph approach to analyze concrete models embedded in online health networks. According to the research that we conducted over a 5-year period on a dataset drawn from a global diabetes forum, reciprocal information diffusion occurred in the forum; a high level of online activity had a positive impact for gratification of the individual user. Both having more experience and expressing polarized emotions played an important role in individuals' post contributions, however these factors had little influence on reply interaction among users. We also modeled post contribution and reply interaction in the same network in respect to the relationship-building processes, which may help in gaining more understanding about the mechanisms underlying communication in online health forums.

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