• Title, Summary, Keyword: Persistence

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Weak Strictly Persistence Homeomorphisms and Weak Inverse Shadowing Property and Genericity

  • Honary, Bahman;Bahabadi, Alireza Zamani
    • Kyungpook Mathematical Journal
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    • v.49 no.3
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    • pp.411-418
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    • 2009
  • In this paper we introduce the notions of strict persistence and weakly strict persistence which are stronger than those of persistence and weak persistence, respectively, and study their relations with shadowing property. In particular, we show that the weakly strict persistence and the weak inverse shadowing property are locally generic in Z(M).

The Structural Relationship among Internal Locus of Control, Interaction, Satisfaction and Learning Persistence in Corporate e-Learning (기업 사이버교육 학습자들의 내적통제소재, 상호작용, 만족도, 학습지속의향 간의 구조적관계)

  • Joo, Young Ju;Shim, Woo Jin;Kim, Eun Kyung;Park, Su Yeong
    • Knowledge Management Research
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    • v.10 no.4
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    • pp.31-42
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    • 2009
  • With the rapid development of information technology, e-learning is growing in corporate. However, there are still problems in learning, such as low learning persistence rate. Learning outcomes are complex phenomenon influenced by a multitude of factors, it is need to considering the direct and indirect causal relationship among various factors. Therefore, the purpose of this study was to develop the causal model that explains the learning outcomes (satisfaction learning persistence) in corporate e-learning. This study was also intended to examine the causal relationship between the interaction and learning persistence through satisfaction mediators. For this, online survey was conducted with a sample of 270 learners who enrolled in cyber training course at A company. The major findings of this study are as follows: First, internality (internal locus of control, ${\beta}=.154$), interaction (${\beta}=.489$), satisfaction (${\beta}=.304$) have direct effect on learning persistence. Second, the interaction has direct effect on the satisfaction (${\beta}=.320$). Third, the satisfaction has direct effect on the learning persistence, and mediating the interaction and learning persistence. This result will contribute to build a learning strategy to improve learning outcomes.

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Patterns and Persistence of Pharmacotherapy for Children and Adolescents with Attention Deficit Hyperactivity Disorder in South Korea (국내 주의력결핍 과잉행동 장애 아동 및 청소년의 약물요법 패턴 및 지속성)

  • Lee, Kyeong Eun;Je, Nam Kyung
    • Korean Journal of Clinical Pharmacy
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    • v.28 no.3
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    • pp.216-223
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    • 2018
  • Objective: This study aimed to assess treatment persistence in Korean children and adolescents with attention deficit hyperactivity disorder (ADHD) and the factors influencing their adherence to ADHD pharmacotherapy. Methods: The study included patients between 6 and 18 years of age with ADHD who were taking various formulations of methylphenidate and atomoxetine on June 1, 2014. Patients were dichotomized as "persistent" or "non-persistent", depending on whether they continued ADHD therapy for 6 months (therapy persistence). We also investigated if the patients were taking the same medication(s) as before and also classified the patients as "medication persistent" or "non-persistent". Patient' characteristics were correlated with therapy persistence and medication persistence. Multiple logistic regression analyses were performed to assess potential risk factors for treatment persistence. Results: Overall, 3,317 patients were included in the analysis. A majority of patients were taking stimulants (82.0%), 16.2% were taking non-stimulants and 1.8% were taking a combination therapy of stimulants and non-stimulants. After 6 months, 2,290 patients (69.0%) continued to take medication for ADHD with 1,953 patients taking the same medication(s) as 6 months previously. Common positive factors for therapy persistence and medication persistence were identified as younger age, retardation, and developmental delay, and long-acting formulations of methylphenidate as either monotherapy or in a combination therapy may be used. Conclusion: ADHD medications were proven to improve academic performance and social skills of children. Collaboration between patients, parents, school staffs, and prescribers is required to improve the persistent use of ADHD medications.

Analysis of Differences in School Support, Career Decision-Making Self-Efficacy, School Satisfaction and Learning Persistence Perceived by University Students - Targeting Students Majoring in Culinary Art and Food Service - (조리·외식 전공자의 일반적 특성에 따른 학교지원, 진로결정 자기효능감, 학교만족 및 학습지속의향 차이 분석)

  • Ju, In-Sook;Sohn, Chun-Young;Hong, Wan-Soo
    • Journal of the Korean Society of Food Culture
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    • v.35 no.2
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    • pp.173-180
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    • 2020
  • This study evaluated methods of improving sustained learning participation by examining the structural relationship of school support consisting of professor support, friend-senior support and educational environment support, career decisionmaking self-efficacy, school satisfaction, and learning persistence depending on the characteristics of college students majoring in culinary art and food service. The study findings were as follows. First, the general characteristics of college students majoring in culinary art and food service were perceived significantly more by female students than by male students. Second, school support directly influenced the career decision-making self-efficacy and school satisfaction, but did not directly influence the learning persistence. Instead, school support influenced school satisfaction and learning persistence indirectly by the medium of career decision-making self-efficacy. Third, career decision-making self-efficacy directly influenced school satisfaction and learning persistence and indirectly influenced learning persistence by the medium of school satisfaction. Lastly, school satisfaction directly influenced the learning persistence, implying that school satisfaction is an important factor for the learning persistence of college students majoring in culinary art and food service. These results show that, because school members and environmental support cannot exclusively make learning persistence, diverse systems and programs must be developed and applied to improve the career decision-making self-efficacy and school satisfaction of college students majoring in culinary art and food service.

The Effect of Research and Development Expenditure on Firm Value: The Case of Earning Persistence and Patent (특허권과 이익지속계수에 따른 연구개발비 지출이 기업가치에 미치는 영향)

  • Xu, Jingwen;Lee, Ki Se;Jeon, SUNG Il
    • Knowledge Management Research
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    • v.12 no.3
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    • pp.59-71
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    • 2011
  • This study intends to examine the effect of research and development (R&D) expenditure effects on firm value through patent and earing persistence. The patent is the representative intangible asset which objectively indicates a typical product of research and development activities to external parties. If a firm has acquired the patent, it receives amicable evaluation from the market compared to the firm which has not acquired patent. Empirical analysis is performed for non-banking firms (1,860 firm-years) listed on Korean Stock Exchange with December fiscal year-end over 2004-2009. Research results are as follows. First, the multiple pricing of patent acquiring firm and earing persistence increased group showed that they have higher prices than the other groups. Second, the multiple pricing of R&D expenditures of earing persistence increased group showed that they have higher prices than the other group. Third, the R&D expenditures of earing persistence increased group is receiving more friendly evaluation from the stock market than the other group.

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Structural Relationships among Engineering Self-Efficacy, Outcome Expectations, Interests, Learning Persistence and Career Preparation Behavior of Engineering Students (공과대학생의 학업지속과 진로준비행동에 영향을 미치는 공학효능감과 결과기대, 흥미간의 구조적 관계)

  • Lee, Myunghwa;Lee, Jeongmin
    • Journal of Engineering Education Research
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    • v.18 no.4
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    • pp.13-25
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    • 2015
  • The purpose of this study was to investigate structural relationships among engineering self-efficacy, outcome expectation, interest, learning persistence, and career preparation behavior of engineering students. Participants (n=428) completed measures of engineering self-efficacy, outcome expectations, interests, learning persistence, and career preparation behavior. Results from structural equation modeling analysis were found to support the proposed model which included learning persistence and career preparation behavior, influence from engineering self-efficacy, outcome expectations, and interests. In addition, major persistence intention and career preparation behavior of engineering college students are influenced by the direct and indirect effects on engineering self-efficacy, interest, and outcome expectations. The implications of the findings on practice for Korean engineering college students are discussed.

Quantitatively Investigating the Effects of Multiple Strategies on Pre-Services Teachers' Mindset and Persistence

  • Meiners, Amanda;Choi, Kyong Mi;Hong, Dae
    • Research in Mathematical Education
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    • v.23 no.2
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    • pp.113-133
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    • 2020
  • Pre-service teachers (PST) are students who are developing their mindset, persistence, instructional practices, and perception of tasks from two perspectives: as current students and as future teachers. As part of a larger study with PSTs engaged in a mindset intervention, this study quantitatively investigated PSTs mindset and persistence. During professional development (PD), PSTs engaged in multiple strategies (MS) tasks that promoted changes to PSTs mindset and persistence. PSTs' mindset pre- and post- PD were categorized after attending at least 4 interventions as fixed, mixed, or growth using the theory of intelligence, and their persistence as high or low using the Grit-S. Changes in categorization were noticed and explored for reasons of what could be done to make mindset interventions more effective such as consistently using challenging mathematics tasks with more open ended answers and focusing on discussion based mathematical lessons.

The effects of career identity on learning persistence and academic achievement: Mediating effect of utility value (진로정체성이 수학 교과 학습지속성과 학업성취에 미치는 영향: 유용가치의 매개 효과)

  • Woo, Yeon-Kyoung;Kim, Seong-Kyeong;Choi, Young-in
    • The Mathematical Education
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    • v.58 no.1
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    • pp.41-54
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    • 2019
  • The purpose of this study was to examine the effects of career identity on learning persistence and academic achievement, and mediating effect of utility value. To examine the effect of mediating role of utility value, we divided utility value into two types, utility value of daily matters and utility value of career. This study was conducted on 228 senior students in high school, to investigate relations among career identity, utility value, learning persistence and academic achievement in mathematics, by using the structural equation model. The results are as follows. First, career identity positively predicted learning persistence in mathematics. Second, career identity positively predicted the utility value of daily matters and career. Third, both type of utility value in mathematics positively predicted learning persistence in mathematics. Fourth, the utility value of daily matters and career, in mathematics subjects, showed differential predictability toward learning persistence and academic achievement. Both type of utility value in mathematics positively predicted learning persistence, but showed differential predictability toward learning academic achievement. Specifically, the utility value of daily matters in the near future did not predict the academic achievement, but the utility value of career in the distant future positively predicted the academic achievement. Fifth, the utility value was found to play a mediating role in the relationship between career identity and learning persistence. Based on the results of this study, implications for mathematics education were discussed.

Queuing Analysis Model for the SR-ARQ Protocol with a Finite Retransmission Persistence (제한된 재전송 횟수를 지원하는 SR-ARQ 프로토콜의 큐잉 지연 분석 모델)

  • Han, Je-Chan;Kim, Beom-Joon;Lee, Jai-Yong
    • The KIPS Transactions:PartC
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    • v.15C no.6
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    • pp.523-530
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    • 2008
  • In this paper, we analyze the mean queuing delay of selective-repeat automatic repeat request (SR-ARQ) protocol with the finite retransmission persistence. The retransmission persistence means the willingness of the protocol to retransmit a lost (or corrupted) packet to ensure reliable packet delivery across a lossy link. According to the retransmission persistence, SR-ARQ protocols have a different performance in terms of both packet delay and link reliability. So far, however, there is no serious study in the effect of the retransmission persistence on the SR-ARQ performance. We present a simple M/G/1 queuing model for the SR-ARQ protocol with the finite retransmission persistence by using the ideal SR-ARQ approximation. The mean queuing delay is obtained from the queuing model and verified its accuracy through the simulation results using the OPNET simulator. Both the analytical predictions and simulation results clearly show the effect of retransmission persistence on the queuing delay of the SR-ARQ protocol in various network conditions: packet loss rate and traffic condition over a wireless link.

A Buffer Size-based Retransmission Persistence Control for ARQ Protocols (버퍼 크기 기반 자동재전송 프로토콜의 재전송 지속성 제어)

  • Kim, Beom-Joon
    • The Journal of the Korea institute of electronic communication sciences
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    • v.6 no.4
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    • pp.487-492
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    • 2011
  • This paper proposes a retransmission persistence control scheme for automatic retransmit request (ARQ) protocol to improve the reliability of a wireless link. Most existing ARQ protocols adopt a fixed retransmission persistence. If the ARQ protocol sets the retransmission persistence too low, there is a limitation in providing transmission reliability. On the other hand, if the ARQ protocol sets the retransmission persistence too high, it increases transmission delay and jitter. In order to figure out the problem, the proposed scheme considers the number of frames in the buffer in controlling the retransmission persistence; it improves the throughput of ARQ protocol by increasing the retransmission persistence when the number of frames is small and decreasing otherwise. Simulation results show that the proposed scheme decreases the transmission delay and jitter significantly comparing to the existing schemes.