• 제목/요약/키워드: Performance Persistence

검색결과 77건 처리시간 0.036초

Structural Relationship between Self-Leadership and Grit and Performance of Taekwondo Players: Focusing on the Multiple Mediations of Grit

  • Kim, Moo-Young
    • International journal of advanced smart convergence
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    • 제10권2호
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    • pp.194-200
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    • 2021
  • The purpose of this study is to analyze the structural relationship among self-leadership, grit, and performance.Specifically, self-leadership was selected as an independent variable, two dimensions of grit were selected as mediator variables, and performance was selected as a dependent variable. This structural equation model is based on previous studies.The subjects of this study were middle and high school Taekwondo players, and the survey was collected using the online survey system KSDC (Korean Social-Science Data Center). The sampling method was a non-probability sampling method, convenience sampling method.A total of 367 copies were collected through this process, and 355 copies were used as the final valid samples after excluding the insincere data.Data processing was done with SPSS 23 for frequency analysis, exploratory factor analysis and reliability analysis. Also, AMOS 21 was used for confirmatory factor analysis and structural equation model analysis. The results of the analysis are as follows: First, self-leadership had a positive effect on bothi interest consistency grit and effort persistence grit. Second, it was found that both interest consistency grit and effort persistence grit have a positive effect on performance.Third,self-leadership had a positive effect on performance.

IEEE 802.11e MAC 성능향상을 위한 PFA (Persistence Factor Adaptive) 백오프 알고리즘 (PFA (Persistence Factor Adaptive) Backoff Algorithm for performance improvement of IEEE 802.11e MAC)

  • 유동관
    • 한국컴퓨터정보학회논문지
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    • 제14권5호
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    • pp.77-83
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    • 2009
  • 본 논문은 IEEE 802.11 무선 LAN에서 DCF나 EDCF 방식이 사용하는 기존의 이진 지수함수 백오프 알고리즘이 네트워크의 트래픽 양이 증가할 경우 잠재적 충돌 가능성이 높아지고 트래픽별 차별화 서비스에 대한 단점이 있어 이를 보완하고자 한다. 이를 위해 일정 계수에 PF를 곱한 값을 적용시켜 성능을 개선시킨 다음에 이것의 성능을 기존의 BEB 알고리즘의 성능과 비교 분석하여 보았다. 개선된 백오프 알고리즘의 성능 분석은 채널이용률, 충돌율, Goodput 관점에서 이루어졌으며 이것을 기존의 알고리즘과 비교한 결과 일정 계수에 PF를 곱한 값을 적용시켜 성능을 개선시킨 PFA 백오프 알고리즘이 기존의 백오프 방식보다 스테이션 수 n값이 40과 같은 큰 값일 경우 채널이용률, Goodput 성능 등이 10%이상 더 향상됨을 볼 수 있었다.

An Empirical Analysis on Performance Inconsistency among Environmental, Social and Governance Components of ESG Ratings

  • Minjung Park
    • 아태비즈니스연구
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    • 제15권1호
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    • pp.33-44
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    • 2024
  • Purpose - The purpose of this study is to empirically investigate the degree of performance inconsistency among the Environmental, Social and Governance ratings. Design/methodology/approach - This study performs regression analysis using the widely used ESG ratings published by the Korea Institute of Corporate Governance and Sustainability. Findings - The results show that firms often do not show consistent performance across the Environmental, Social and Governance aspects, with excellent performance on one aspect but mediocre or poor performance on another. The paper also finds some degree of firm-level persistence in such performance inconsistency, suggesting that the traits of the firm and the industry the firm belongs to might influence whether a firm shows inconsistent performance across the three aspects. Research implications or Originality - This paper highlights the need for researchers and practitioners to understand the underlying behavior of the individual E, S and G ratings, instead of taking them as given, in order to properly design their analyses.

SUBSAMPLING CHANGE-POINT DETECTION IN PERSISTENCE WITH HEAVY-TAILED INNOVATIONS

  • Han, Sier;Tian, Zheng
    • Journal of applied mathematics & informatics
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    • 제23권1_2호
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    • pp.57-71
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    • 2007
  • This paper considers how to detect structure change in persistence from I(1) to I(0) with innovations in the domain of attraction of a K-stable law. We derive the asymptotic distribution of test statistic and find that the asymptotic distribution of test statistics depends on the stable index K, which is often typically unknown and difficult to estimate. Therefore the subsampling method is proposed to detect changes without estimating K. We establish the asymptotic validity of this method and assess its performance in finite samples by means of simulation study.

Counting Up while Doing Tasks Makes You Feel More Difficult than Counting Down

  • Ahn, Hee-Kyung
    • Asia Marketing Journal
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    • 제17권2호
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    • pp.63-71
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    • 2015
  • In this research, we explore whether mere exposure to external cues with vertical progress (e.g., moving upward or moving downward) can influence individuals' persistence to complete focal tasks. Drawing on the theory of embodied cognition, we propose that, a moving-upward (vs. downward) cue activates the abstract concept of difficulty, which is associated with the physical experience of climbing uphill (vs. downhill). Due to this association between moving uphill and difficulty, merely exposing individuals to the moving-upward cue can induce greater feeling of difficulty and this greater difficulty, in turn, reduce individuals' persistence, compared to exposing individuals to the moving-downward cue. Across three studies, we find supporting evidence for the effect of the external cues with vertical progress on individuals' performance both in physical tasks and in a cognitive task.

뮤추얼펀드의 자금흐름과 주식거래가 주가에 미치는 효과 (Mutual Funds Trading and its Impact on Stock Prices)

  • 고봉찬;김진우
    • 재무관리연구
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    • 제27권2호
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    • pp.35-62
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    • 2010
  • 본 연구는 2002년 1월부터 2008년 6월까지의 국내 뮤추얼펀드 월별 자료를 이용하여 펀드의 성과지속성과 스마트머니 현상이 존재하는지를 검증하고, 이들 현상이 펀드의 자금유출입에 따른 주식거래에 의해 초래되는 가격압박효과에 기인하는지를 실증분석하였다. 먼저, 과거 성과가 가장 높았던 펀드그룹이 과거 성과가 가장 낮았던 펀드그룹에 비해 향후 3년까지 월평균 0.11%~1.05%의 유의한 초과수익률을 보임으로써 성과지속성은 존재하는 것으로 분석되었으나, 과거 순자금유입액이 가장 많았던 펀드그룹은 가장 적었던 펀드그룹에 비해 향후 투자성과가 오히려 낮게 나타남에 따라 스마트머니 효과는 약한 것으로 분석되었다. 또한 펀드의 과거 자금유출입에 따른 주식거래량으로 측정한 가격압박측정치가 가장 높았던 주식그룹은 가장 낮았던 주식그룹에 비해 당월에 1.01%의 높은 초과수익률을 얻음으로써 가격압박효과가 존재하는 것으로 분석되었다. 그러나 가격압박측정치가 동일한 펀드그룹 내에서도 과거 성과가 높았던 펀드들은 성과가 낮았던 펀드들에 비해 여전히 향후 2년까지 월평균 0.08%~0.77%의 높은 초과수익률을 보임으로써, 펀드 성과지속성의 주요 발생원인이 가격압박효과보다는 펀드매니저의 능력차이에 기인하는 것임을 시사하고 있다. 이러한 결과는 회귀분석을 통해서도 미래 펀드수익률에 대하여 가격압박측 정치는 비유의적인 계수값을 갖는 반면, 과거 펀드수익률은 유의한 양의 설명력을 갖는 것으로 나타남으로써 지지되고 있다.

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원격대학 학습자의 학업스트레스와 ASE 모델 요인이 학업지속의도에 미치는 영향 (The Effect of Academic Stress and ASE(Attitude-Social Influence-Self Efficacy) Model Factors on Academic Persistence of Online University Students)

  • 이다예;서영숙;김영임
    • 한국콘텐츠학회논문지
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    • 제18권10호
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    • pp.453-463
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    • 2018
  • 개인적 변인의 폭이 넓은 학습자 특성과 학업 방식의 독특성, 그리고 다양한 학습 환경이라는 특성을 가진 원격대학생의 학업지속성을 높이기 위하여 원격대학 학습자에 대해 행위수행의도를 중심으로 접근하는 ASE 모델을 포함하여 분석하는 것은 새로운 접근이라 할 것이다. 이에 본 연구에서는 원격대학 학습자의 학업스트레스와 학습태도, 사회적 영향과 학업적 자기효능감으로 구성된 ASE 모델요인과 학업지속의도 간 관계를 파악하고, 이들 요인이 원격대학 학습자의 학업지속의도에 미치는 영향을 파악하고자 하였다. 이를 위해 K 원격대학 2학년 학생을 대상으로 2018년 3월부터 6월까지 설문조사를 실시하여 최종 181명의 설문자료를 빈도분석, ${\chi}^2$검증, t-검증. F-검증, Pearson's correlation 분석 및 다중회귀분석을 이용하여 분석하였다. 학업지속의도에 영향을 미치는 요인에 관한 다중회귀분석 결과, 모델은 통계적으로 유의하였고(F=15.76, p<.001), 설명력은 29%였으며, 유의한 영향요인은 학업스트레스(${\beta}=-.16$, p=.016), 온라인 학습태도(${\beta}=.44$, p<.001)와 사회적 영향 요인 중 사회적 지지(${\beta}=.13$, p=.045)였다. 원격대학 학습자의 학업지속의도를 높이기 위해 학업스트레스를 낮추고, 온라인 학습태도를 높이며, 사회적 지지를 구축할 수 있는 정교한 맞춤형 프로그램의 개발 및 적용이 필요하다.

Performance of Three Warm Season Turfgrasses under Linear Gradient Irrigation

  • Ow, Lai Fern;Ghosh, Subhadip
    • Weed & Turfgrass Science
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    • 제6권1호
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    • pp.61-66
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    • 2017
  • The appropriate level of irrigation for turfgrasses is vital to the performance of the turfgrass as well as conservation of water. Linear gradient irrigation system (LGIS) facilitates long-term study of turf performance under continuous irrigation gradients at extreme ends of the irrigation scale. The objectives of this study were to: a) determine the minimum irrigation requirements and relative drought resistance in three warm season turfgrasses; and b) evaluate the medium to long-term effects of irrigation levels on turf persistence, weed invasion, and susceptibility to diseases. Results suggest that grasses differed in drought resistance and persistence under variable irrigation regimes. Irrigation (Ep) required for consistent acceptable turf quality for respective grasses was Cynodon dactylon x C. transvaalensis (61%), Zoysia matrella L. Merr (73%), and Stenotaphrum secundatum 'Palmetto' (86%). Brown patch infection was most prevalent in Stenotaphrum secundatum 'Palmetto' at 12 and 125% Ep irrigation. Cynodon dactylon x C. transvaalensis and Zoysia matrella L. Merr were better able to adapt to the various irrigation regimes, and this ability allowed these species to resist drought, and maintain turf coverage which in turn, kept weeds and the occurrence of diseases at bay. Ranking these grasses for their drought tolerance abilities showed that Cynodon dactylon x C. transvaalensis had the most outstanding resistance against drought, followed by Zoysia matrella L. Merr, and lastly, Stenotaphrum secundatum 'Palmetto'. Despite having the highest irrigation requirement, Stenotaphrum secundatum 'Palmetto' was still not able to maintain persistence at high irrigation regimes. Likewise, this grass also lost turf coverage at low irrigation levels.

심폐소생술 교육 후 재교육이 간호대학생의 지식, 수행능력 및 자기효능감 지속에 미치는 효과 (Effects of cardiopulmonary resuscitation reeducation on persistence of knowledge, performance and self-efficacy of nursing students)

  • 채명정;이진희;송인자;김진일
    • 한국응급구조학회지
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    • 제19권1호
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    • pp.51-62
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    • 2015
  • Purpose: This study was undertaken to examine the effects regarding reeducation of cardiopulmonary resuscitation on persistence of nursing students' knowledge, performance, and self-efficacy. Methods: The research design for this study was a repeated experimental design featuring 35 female nursing students. Participants were educated using the standardized cardiopulmonary resuscitation protocol from the American Heart Association. Three months after the initial education, participants received reeducation about cardiopulmonary resuscitation. Knowledge and self-efficacy were measured before the initial education. Knowledge, performance, and self-efficacy were measured immediately after the initial education, 3 months later, and 6 months later. Collected data were analyzed using PASW Statistics 18.0. Results: Knowledge and self-efficacy significantly increased immediately after the initial education; knowledge, performance, and self-efficacy significantly decreased 3 months afterwards. No further decrease occurred until 3 months after reeducation. Conclusion: These results suggest that the duration between initial education and reeducation was insufficient, although the effects of cardiopulmonary resuscitation education were maintained 3 months after reeducation.

게임으로 만들어진 슬롯화된 ALOHA를 위한 Bayes 풍의 예측 (Bayesian Prediction for Game-structured Slotted ALOHA)

  • 최천원
    • 대한전자공학회논문지TC
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    • 제49권1호
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    • pp.53-58
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    • 2012
  • 게임 이론적 시각으로 p-persistence 슬롯화된 ALOHA를 비협력 게임으로 구성하고, 이 게임에서 Nash equilibrium을 구해 찾아 패킷 전달을 시도할 확률 값을 마련한다. Nash equilibrium의 수학적 표현에는 반드시 활성 변방국의 수가 포함되지만, 많은 실제 응용에서 이러한 수를 거의 알 수가 없다. 따라서 본 논문에서는 패킷의 전달을 시도할 지 결정하기에 앞서 활성 변방국의 수를 예측하는 Bayes 풍의 방식을 제안한다. 제안하는 Bayes 풍의 방식은 변방국이 스스로 자연스럽게 구할 수 있는 최소 정보만을 필요로 하지만 상당량의 정보에 의존하는 방식에 비해 경쟁력 있는 예측 성능을 보여 준다.