• Journal of vocational education research
• /
• v.37 no.2
• /
• pp.39-75
• /
• 2018

The purpose of this study is to verify the general characteristics in the previous studies and the magnitude of the correlation between the learner's satisfaction and the academic achievement in the education and training program. To do this, we searched relevant literature from 2000 to 2016, and conducted a systematic review of the literature on the final 31 studies through the selection criteria and quality evaluation. Among them, 27 meta-analysis of the literature was conducted. The finding of the study were as follows. First, a total of 31 studies were conducted from 2000 to 2016, and more than half of them(16) were conducted for the last 4 years(2009~2012). In terms of education and training students, there are 18 college students, 9 workers, and 4 elementary students in order of study. In terms of methods, 15 collective education, 14 distance education, 2 blended education. In terms of learner's participation, 22 the general participation, 9 the active participation. Second, as a result of the meta-analysis, the magnitude of the correlation between satisfaction and achievement was moderate(ZCOR=.297, 95%: CI .210~.383). Third, as a result of verifying the difference in the magnitude of the correlation effect between satisfaction and achievement according to the characteristics of the education and training program, there was no difference between the groups in the student object and education method, but there was a difference in the magnitude of the correlation effect depending on the participant type(Q=15.40, df=1, p<.0001). The active participation showed a correlation effect size larger(ZCOR=.588, 95%: CI .422~.754). The effect size of the general participation was lower than the median(ZCOR=.211, 95%: CI .12 ~.300).

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.32 no.10C
• /
• pp.1032-1041
• /
• 2007

The global navigation satellite system (GNSS), which is the core technique for the location based service, adopts the direct sequence/spread spectrum (DS/SS) as its modulation method. The success of a DS/SS system depends on the synchronization between the received and locally generated pseudo noise (PN) signals. As a step in the synchronization process, the tacking scheme performs fine adjustment to bring the phase difference between the two PN signals to zero. The most widely used tracking scheme is the delay locked loop with early minus late discriminator (EL-DLL). In the ideal case, the EL-DLL is the best estimator among various DLL. However, in the band-limited multipath environment, the EL-DLL has tracking bias. In this paper, the timing offset range of correlation function is divided into advanced offset range (AOR) and delayed offset range (DOR) centering around the correct synchronization time point. The tracking bias results from the following two reasons: symmetry distortion between correlation values in AOR and DOR, and mismatch between the time point corresponding to the maximum correlation value and the synchronization time point. The former and latter are named as the type I and type II tracking bias, respectively. In this paper, when the receiver has finite bandwidth in the presence of multipath signals, it is shown that the type II tracking bias becomes a more dominant error factor than the type I tracking bias, and the correlation values in AOR are not almost changed. Exploiting these characteristics, we propose a novel tracking bias mitigation scheme and demonstrate that the tracking accuracy of the proposed scheme is higher than that of the conventional scheme, both in the presence and absence of noise.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2000.10a
• /
• pp.555-558
• /
• 2000

소프트웨어 프로세스 능력 수준에 영향을 미치는 요인을 찾아내어, 강점은 격려하고 약점을 개선하는 프로세스 개선활동은 기업의 경쟁력 향상을 위하여 매우 중요한 일이다. 본 연구에서는 이러한 요인을 찾아내기 위하여 SPICE(ISO/IEC 15504) 프로젝트에서 국제적으로 실시된 소프트웨어 심사 결과를 이용하였다. 분석 요인으로 IT부서 사원수, ISO 9001 인증여부, 안정성, 경제적 손실도, 보안성, 환경 영향도를 사용하였으며, 본 자료가 범주형이므로 분석 방법으로 통계적인 방법론인 "수량화방법 II"를 이용하였다. 수량화방법 II에서는 요인의 중요도를 나타내는 지표로 범위와 편상관을 사용한다. "범위"를 지표로 할 경우, 보안성이 능력수준과 가장 높은 관련이 있는 것으로 나타났으며, "편상관"을 지표로 할 경우, ISO 9001 인증이 가장 관련이 높은 것으로 나타났다. 이는 보안성이 높게 요구되는 회사의 경우, 품질시스템이 잘 갖춰져 있고, ISO 9001 인증을 받는 둥의 품질관리를 하여 프로세스 능력수준 또한 높게 나왔다고 추론할 수 있다.

• Journal of the Korean Society for Railway
• /
• v.16 no.5
• /
• pp.410-417
• /
• 2013

The purpose of this study was to analyze the effect of service convenience on customer satisfaction and reuse intention by 200 passengers using a Korail talk app. The result of the analysis showed that service convenience was positively correlated with satisfaction in Korail customers using the Korail talk app. Also, customer satisfaction with service convenience had a positive effect on reuse intention in these users. However, service convenience was not significantly correlated with customer's reuse intention. The results of this study suggest that it is important for Korail to offer improved service convenience for Korail talk app users consistently in order to improve customer satisfaction and reuse intention by Korail passengers.

• Korean Journal of Child Education & Care
• /
• v.19 no.3
• /
• pp.1-12
• /
• 2019

Objective: This study aims to thoroughly analyze the correlation effect size between domestic violence and school violence by meta-analyzing previous studies on the correlation between school and domestic violence. Methods: For this purpose, meta-analysis was performed on the selected research material, which consists of national research data collected from various databases from 2001 to April, 2019. 16 thesis and 9 papers on the correlation between school and domestic violence were selected. A random effect model analysis based on the homogeneity examination results was performed on the selected data. Results: The results showed, just as Cohen (1977) proposed, that the correlation effect size between domestic and school violence was 0.25, which is moderate. This is a somewhat lower number than the previous studies on the same subject presented. Of the sub-categories of domestic violence, physical violence and psychological violence appeared to have a correlation effect size of 0.34 and 0.28, respectively, with physical violence showing the highest correlation effect size. Of the types of domestic violence, witnessing spouse violence and experiencing neglect appeared to have a moderate correlation size effect of 0.24. All of these results were statistically significant. Conclusion/Implications: This study utilized meta-analysis as a comprehensive and systematic method to analyze the correlation effect between domestic and school violence. The results presented may lead to discussions on the subject's social implications, limits, and propositions for future studies.

• Journal of agricultural medicine and community health
• /
• v.45 no.3
• /
• pp.130-140
• /
• 2020

목적: 본 연구는 65세 이상 농업인과 비농업인의 노화에 따른 취약성을 파악하고 차이를 비교 분석하고자 하였다. 방법: 본 연구는 단면 연구로서 강원도에 거주하는 고령의 농업인 29명과 비농업인 25명이 연구에 참여하였다. 노화에 대한 취약성 평가를 위해 노쇠, 신체 구성, 인지·신체 기능, 심리 상태를 검사하였다. 결과: 집단 간 유의한 차이가 있었던 배우자 유무를 보정하여 편 상관 분석한 결과, 농업인에서만 나이와 취약성 요소 간 유의한 상관관계가 있었으며, 편 상관 계수를 비교하였을 때 body mass index(BMI, r = -0.625 vs 0.026, P < 0.01), 우울도(r = 0.521 vs -0.046, P < 0.05)에서 유의한 차이가 있었다. 결론: 고령의 농업인과 비농업인의 노화에 대한 취약성을 비교하였을 때 나이와 취약성 요소 간 유의한 상관관계는 농업인에서만 나타나 비농업인과는 차별적인 패턴을 보였다. 이러한 결과는 농촌의 고령 농업인에 대하여 건강한 노화를 위한 예방 및 관리 전략이 필요함을 시사한다.

• Journal of the Korean earth science society
• /
• v.42 no.1
• /
• pp.76-87
• /
• 2021

In this study, temporal trend of researches in earthquake with groundwater level, water quality, radon, remote sensing, electrical resistivity, gravity, and geomagnetism was searched from 2001 to 2020, using the journals indexed in Web of Science, and the number of articles published in international journals was counted in relation to the occurrences of earthquakes (≥Mw 5.0, ≥Mw 6.0, ≥Mw 7.0, ≥Mw 8.0, and ≥Mw 9.0). The number of articles shows an increasing trend over the studied period. This is explained by that studies on earthquake precursor and seismic monitoring becomes active in various fields with integrated data analysis through the development of remote sensing technology, progress of measurement equipment, and big data. According to Mann-Kendall and Sen's tests, gravity-related articles exhibit an increasing trend of 1.30 articles/yr, radon-related articles (0.60 articles/yr), groundwater-related articles (0.70 articles/yr), electrical resistivity-related articles (0.25 articles/yr), and remote-sensing-related articles (0.67 articles/yr). By cross-correlation analysis of the number of articles in each field with removing trend effect and the number of earthquakes of ≥Mw 5.0, ≥Mw 6.0, ≥Mw 7.0, ≥Mw 8.0, and ≥Mw 9.0, radon and remote sensing fields exhibit a high cross-correlation with a delay time of one year. In addition, large-scale earthquakes such as the 2004 and 2005 Sumatra earthquake, the 2008 Sichuan earthquake, the 2010 Haiti earthquake, and the 2010 Chile earthquake are estimated to be related with the increase in the number of articles in the corresponding periods.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.12 no.12
• /
• pp.5731-5740
• /
• 2011

The aim of this study is to evaluate the relationship between sensory function and performances in the activities of daily living in chronic CVA patients. One-hundred and thirty-eight CVA patients, who experienced their CVA more than 6 months ago, were recruited. Their sensory, motor and cognitive functions, as well as performances in activities of daily living were assessed and analysed. The results indicated that Graphesthesia and proprioception of the affected hand of patients with right hemiplegia showed statistically significant correlation with personal hygiene. The motor functions of the unaffected side in patients with left hemiplegia showed statistically meaningful correlation with ADL performances. The correlation between the motor function of upper limb of the unaffected side and the activities of daily living showed statistical significance in both right and left hemiplegia.

• Therapeutic Science for Rehabilitation
• /
• v.4 no.1
• /
• pp.39-51
• /
• 2015

Objective : To synthesize and identify the studies that delineated the relationship between quality of life and other factors in stroke patients in South Korea. Method : Electronic databases were searched, including KISS, NDSL, National Assembly Library and KmBase. The search terms included stroke, quality of life and correlation, relationship. Only papers published in Korean were included. Results : Twelve studies, from 256 references screened, were included. All studies were non-experimental and correlational analysis. A correlation coefficient between Quality of Life and ADL .293~.622, Depression -.804~-.533, Cognition .090~.610, Quality of Sleep .107, Quality of Satisfaction .367, Fatigue -.260, MAL(Quality of Movement .208, Amount of Use .364), Family Support .824, Pain -.306, Motivation for Rehabilitation .51~.86, Balance .740, Self-efficacy .388 were analyzed respectively. Conclusion : The quality of life of stroke patients was influenced by multiple factors. Occupational therapists need to consider the functions of upper extremity and activities of daily living as well as depression, cognition, sleep, family support, pain, and self efficacy to improve quality of life of stroke patients.

• Journal of dental hygiene science
• /
• v.14 no.1
• /
• pp.67-73
• /
• 2014

This study analyzed 548 pieces of these, which were reported in the Journal of Dental Hygiene Science of having been published from 2001 to Vol. 12, No. 6 in 2012. In conclusion, as for analysis of research design, first, it was the largest in cross sectional research. Second, the research subjects of survey theses were higher in order of dental hygienist and dental hygiene student. Third, number of thesis authors was the largest in order of two persons and three persons. Fourth, statistical method was in order of descriptive statistics, t-test, and ANOVA. Research theme was in order of dental health behavioral science and clinical dental hygiene. Fifth, as for research-expense benefit, only 17.7% was supported research funds. As a result of this study, there should be a research on thesis of diverse designs in the future. There is a need of being performed actively a research on alienated classer or special subjects as well as a research on activity related to dental hygiene.