• Journal of the Korean Data and Information Science Society
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• 제26권3호
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• pp.729-738
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• 2015

품질특성치의 중심과 산포를 하나의 통계량으로 관리하는 단일 관리도는 품질특성치가 정규분포를 따른다고 가정하지만 실제 데이터들은 왜도가 양수이거나 첨도가 양수인 경우가 많다. 본 논문에서는 품질특성치가 정규분포를 따르지 않은 경우에 가짜 알람률 (false alarm rate; FAR)을 이용하여 단일 관리도 성능을 비교하였다. 고려된 단일 관리도는 반원관리도, 최대 관리도 및 평균제곱오차관리도이며 모의실험 결과, 공정이 안정 상태인 경우는 최대관리도의 성능이 좋았으며, 공정이 불안정상태인 경우에는 왜도가 양수일 때 최대관리도, 첨도가 큰 경우에는 평균제곱오차 관리도의 성능이 우수하였다.

• 한국보건간호학회지
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• 제13권2호
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• pp.45-58
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• 1999

This study was conducted to compare the practice of health promoting behaviors between hospital workers and government officers. The subjects for this study were consisted of 344 hospital workers in four university hospitals and 340 government officers in four district offices in the Kyong-in area. Data were collected by using constructed questionnaires from January to February in 1997 and analyzed by Chi-square test, t-test. ANOVA, Pearson correlation coefficient and stepwise multiple regression. The results were as follows : 1. There was no significant difference between hospital workers and government officers in practice of health promoting behaviors as a whole. but among five domains of the health promoting behaviors, hospital workers was significantly higher than that of government officer in the domain of health responsibility, while they were significantly lower than those of government officer in the domain of exercise & nutrition and stress management. The mean score of health promoting behavior for hospital workers and government officer were 2.40, and 2.47, respectively. The health promoting behavior in relation to the characteristics of the hospital workers varied significantly according to sex and age. The domain of self-actualization ranked highest in health promoting behaviors of hospital workers, interpersonal support came next. stress management, health responsibility and exercise & nutrition followed them. While those of government officers. the domain of self-actualization ranked highest. interpersonal support came next, stress management, exercise & nutrition and health responsibility followed them. 2. There were no significant difference between hospital workers and government officers in the health perception with mean score of 3.32 and 3.34 respectively, in the self esteem with mean score of 2.82 and 2.84 respectively, in the self-efficacy with mean score of 70.50 and 72.35 respectively. in the internal health locus of control with mean score of 2.95 and 3.03, respectively, m the chance health locus of control with mean score of 2.10 and 2.13, respectively, m the powerful others health locus of control with mean score of 2.39 and 2.46, respectively. 3. The practice of health promoting behavior of hospital workers were strongly associated with self-esteem and self-efficacy, and self-esteem was strongly correlated with self-efficacy. And the practice of health promoting behavior of government officers were strongly associated with self-esteem, powerful others health locus of control and internal health locus of control. and self-esteem was strongly correlated with self-efficacy. 4. The combination of self-esteem, powerful others health locus of control. health perception. self-efficacy. internal health locus of control. age and marital status explained $45.7\%$ of variance of likelihood to engage in health promoting behavior of hospital workers. And the combination of self-esteem. powerful others health locus of control. health perception. self-efficacy. internal health locus of control. sex and marital status explained $48.2\%$ of variance of likelihood to engage in health promoting behavior of government officers.

• 성인간호학회지
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• 제12권1호
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• pp.64-76
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• 2000

The purpose of this study was to identify the major factors affecting performance in health promoting lifestyle of the elderly. The subjects for this study were 244 elderly person over the age of 60, living in K country, Kyongnam. Data were collected from August 31 to September 30, 1998. The collected data were analyzed with an SPSS program using frequency, percent, mean, cronbach alpha, t-test, ANOVA, Pearson' coefficients of correlation, Duncan test, and stepwise multiple regression. The results are summarized as follows. 1) The average score of performance in the health promoting lifestyle was 2.73. The variable with the highest degree of performance was regular diet(3.29), whereas the one with the lowest degree was self-control(2.22). 2) Performance in the health promoting lifestyle was significantly correlated with self esteem(r=.28, p=0.00), internal health locus of control(r=.58, p=0.00), powerful others health locus of control(r=.48, p=0.00), chance health locus of control(r=.25, p=0.00), perceived health status(r=.53, p=0.00). 3) Performance in the health promoting lifestyle was significantly correlated with such demographic variables as education level (F=9.47, P=0.00), marital status(F=2.63, P=0.05) and previous occupation(F=3.85, P=0.00). 4) The combination of internal health locus of control, powerful others health locus of control and perceived health status explained 43.4percent of the variance of health promoting lifestyle On the basis of this study, other factors affecting others health promoting lifestyle should be identified.

• 한국산학기술학회논문지
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• 제17권6호
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• pp.438-448
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• 2016

본 연구는 대학생들의 체중조절행동에 영향을 미치는 요인을 파악하고자 실시하였다. 연구대상자는 C지역 대학에 재학 중인 대학생을 대상으로 자가보고식 설문조사로 시행되었다. 조사기간은 2015.12.01-12.20일 까지였고, 분석대상은 289명 이었다. 자료는 기술적 통계, t-tset, ANOVA, pearson correlation과 stepwise multiple regression으로 분석 하였다. 그 결과 대학생들은 자신의 체형에 대한 인식에 왜곡된 현상이 두드러지며, 특히 타인평가에 의한 체형인식과 비만스트레스, 체중조절경험이 체중조절행동에 영향을 미치는 것으로 나타났다. 체중조절행동과의 상관관계에서는 본인체형인식(r=.31, p<.001), 타인평가체형(r=.30, p<.001), 비만스트레스(r=.43, p<.001)등이 체중조절행동과 관련성이 높게 나타났다. 다중회귀분석결과, 체중조절행동에 영향을 미치는 요인으로는 비만스트레스(${\beta}=.37$, p<.001), 타인평가체형(${\beta}=.15$, p=.009)이 밀접하게 관련되는 영향요인임을 알 수 있었으며, 이 변수들의 설명력은 20% 인 것으로 나타났다(F=37.30, p<.001). 결론적으로, 대학생의 체형인식에서 타인평가체형, 비만스트레스가 체중조절행동관련 예측요인으로 나타났다. 이러한 예측요인 등을 파악하여 자신의 체형을 객관적으로 판단하여 인식할 수 있고 적절한 체중조절을 할 수 있는 정보제공, 식이와 운동을 격려하는 예방프로그램, 건강교육 및 중재 프로그램의 개발과 실시가 필요하다고 생각된다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2000년도 추계학술대회 논문집
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• pp.161-164
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• 2000

An improved robust hybrid control law is proposed This law uses the separated bounding function: so uncertainties of each axis does not affect the others. Also, this law uses the separated $\varepsilon$, so we can take different $\varepsilon$ for each axis This law guarantees the practical stability in sense of Lyapunov. Simulation was performed to validate this law using a four-axis SCARA type robot manipulator.

• ETRI Journal
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• 제37권5호
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• pp.1012-1022
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• 2015

Conventional cryptographic algorithms are not sufficient to protect secret keys and data in white-box environments, where an attacker has full visibility and control over an executing software code. For this reason, cryptographic algorithms have been redesigned to be resistant to white-box attacks. The first white-box AES (WB-AES) implementation was thought to provide reliable security in that all brute force attacks are infeasible even in white-box environments; however, this proved not to be the case. In particular, Billet and others presented a cryptanalysis of WB-AES with 230 time complexity, and Michiels and others generalized it for all substitution-linear transformation ciphers. Recently, a collision-based cryptanalysis was also reported. In this paper, we revisit Chow and others's first WB-AES implementation and present a conditional re-encoding method for cryptanalysis protection. The experimental results show that there is approximately a 57% increase in the memory requirement and a 20% increase in execution speed.

• 한국초등상담교육학회:학술대회논문집
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• 한국초등상담교육학회 2004년도 학술대회
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• pp.271-294
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• 2004

The purpose of this study was to examine the effects of MMTIC group counseling program on self-esteem of elementary school students. The hypothesis was that the self-esteem test scores of experimental group would be significantly higher than those of control group. The subjects were the twenty 5th graders sampled from the 66 5th graders of D Elementary School in Boryeong City based on self-esteem test scores. The 10 subjects were randomly assigned experiment group and others were assigned control group. The self-esteem test by Mun, Yong Woo (2002) modified from the measurement of Kim, Heui Hwa (1989) was administrated as pre and post test. The experimental group has experienced MMTIC group counseling program. On the other hand, the control group has not been given any advice during the counseling periods. The counseling was once a week at two o'clock in the afternoon for ten weeks from the eleventh of May to sixteenth of July in 2003. Each counseling session lasted sixty to eighty minutes. The group counseling program, which has been used in this research, has been adapted to the level of elementary students with the consideration of MBTI and MMTIC Workshop in reference to a few theses related to MMTIC development program (Jung, Gyeong Yeon, 2001: Gang, Jae Jeong, 2002; Lee, Jae Mo 2002). The results were analysed by t-test. These statistics with a quantitative result has been supplemented with a qualitative analysis by a questionnaire and the descriptions of impression of subjects of experimental group. The results of this research was that the analyses of the questionnaire and a description of their impression have shown that the counseling has had an significantly impact on their understanding themselves and others. In particular, this program has been positively conducive to receptive relationships to others. In conclusion, the MMTIC group counseling program has helped elementary students I understand themselves and others, increase receptive competence, encourage their confidence, improve personal relationships and enhance their adaptation to their school life. It suggests that this program has a feasible effect on children's sense of self-esteem.

• Plant Resources
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• 제2권2호
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• pp.88-95
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• 1999

These experiments were conducted to evaluate the variability of seed germination and seedling growth with different levels of polyethylene glycol(PEG 6,000) solution in onion seed. Average germination percentage of seed primed in PEG solution with 1.00 and 0.75 MPa was higher than control, and that of seed primed in 1.50MPa was lower than unprimed control. Germination percentage(GP) of seed primed for 5 days was highest, and as the primed days become long, the GP was decreased. The GP of airation seed during the primed was higher than that of unairation seed, about 5% , respectively. The GP of washed seed after primed was higher than that of unwashed seed, but that of redried seed after primed was lower than that of the others. The highest GP cultivar was Chunjoogoohyung and the lowest GP cultivar was Seouldego in unredried seed after primed, but Chunjoojoonggo was highest and Jungpoonwhang was the lowest cultivar in redried seed after primed. As the PEG concentration increased, the seedling length(SL) was shortened, and seed primed for 15 days was longer than other treatments. The SL of primed seed was similar to GP. The SL of washed seed after primed was longer than that of others, but that of redried seed after primed was shortest among the others. The SL of Chunjoojoonggo and Nongwoodego was longest and Seouldego was shortest among the cultivars in unredried seed after primed, but that of Chunjoogoohyung and Chunjoojoonggo was longest and Seouldego was the shortest cultivars in redried seed after primed.

• Tribology and Lubricants
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• 제18권1호
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• pp.49-54
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• 2002

In this study, the characteristics of the hydraulic servo mechanism for proportional position control of a hydraulic construction eguipment were analyzed using the developed analysis tool. The result were used in the others hydraulic system except construcdtion eguipment to improve the static performance of the system, the system parameter effects on the controllable region and the hydraulic servo mechanism variation were studied.

• 대한전기학회논문지:전력기술부문A
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• 제48권5호
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• pp.650-657
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• 1999

In this paper, a real-time communication method using a PICNET-NP(Plant Instrumentation and Control Network for Nuclear Power plant) is proposed with an analysis of the control network requirements of DCS(Distributed Control System) in unclear power plants. The method satisfies deadline in case of worst data traffics by considering aperiodic and periodic real-time data and others.