• 한국지구과학회지
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• 제31권1호
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• pp.95-105
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• 2010

본 연구의 목적은 집단논리적사고력검사의 이용 목적에 따라 일반화가능도이론을 적용하여 문항과 피험자만을 고려한 단일국면의 오차원, 그리고 문항과 피험자, 그리고 영역을 고려한 다국면의 오차원을 분석하는 데 있다. 연구는 지방 소재 초 중 고등학생 총 1016명을 대상으로 이루어졌으며, 21문항의 GALT 완본을 40분 동안 실시하고, 이 중 축소본에 해당하는 12문항을 별도로 추출하여 일반화가능도이론을 이용한 신뢰도 분석에 이용하였다. 자료의 분석을 위해 일반화가능도이론을 적용하여 $p{\times}i$설계와 $p{\times}(i:h)$설계로 나누어 G 연구와 D 연구를 실시하였다. 분석결과는 다음과 같다. 첫째, 완본과 축소본을 $p{\times}I$설계로 D 연구를 수행한 결과 완본의 경우 21문항을 평가했을 때 0.87로 적정 수준의 일반화가능도 계수인 0.80을 상회하였으며, 13문항에서도 적정 수준의 일반화가능도 계수에 도달하였다. 축소본의 경우 12문항을 평가했을 때 0.77로 적정 수준의 일반화가능도 계수에 미치지 못하였으며, 최소 15문항 이상에서 신뢰도가 적정 수준에 도달하였다. 둘째, 축소본을 $p{\times}(I:H)$설계로 D 연구를 수행한 결과 6영역에 대해 영역별로 2문항씩 구성될 경우 0.71로 적정 수준의 일반화가능도계수인 0.80 보다 낮게 측정되었으며, 최소 영역별 5문항 이상에서 신뢰도가 적정 수준에 도달하였다.

• 한국학교보건학회지
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• 제15권1호
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• pp.123-139
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• 2002

This study was conducted to identify the level of sexual awareness and the demand for sex education, to investigate the attitude toward and acceptance of heterosexual friendship, and to identify the experience and direction of sex education of parents. The data were collected from 119 parents with high school students by the structured questionnaire from June 1, 2001 to August 31, 2001. Parents and teachers showed a similar attitude on sexual awareness, but teenagers showed a different attitude. In terms of the level of feeling of and interest in 'sex', teenagers, parents and teachers were comfortably accepting it. As for sexual curiosity in puberty, 84.8% of the parents and 95.5% of the teachers responded that it was natural, whereas only 14.7% of teenagers responded that it was natural. But As for the item that 'sex is natural as one of human needs', 3.6% of the teenagers, 16.8% of the parents and only 1.2% of the teachers responded that it was not. As for the item that 'Man have a stronger sexual impulse than woman", 6.1% of the teenagers, 16.8% of the parents and 17.3% of the teachers responded that it was not. This indicates that teenagers have a far stronger sexist awareness, which also reflect that the sex culture of Korean society that regards sex as man's sexual monopoly. 64.2% of the teenagers and 90.2% of the teachers responded that it was impossible to overcome the sexual impulse, whereas only 8.4% of the parents responded that it was possible. As for the item of masturbation, 64.5% of the teenagers responded that it was possible for male students and not possible for female students. 67.2 of the parents and 91.1% of the teachers responded that it was possible regardless of sex. In case of pregnancy in adolescence, most of the responding teenagers, parents and teachers chose abortion. This indicates that respondents have a poor basic understanding of the life-despising climate, responsible sexual intercourse and motherhood protection. As for the item of 'female refusal on male sexual approach', respondents accepted female refusal as it was in orders of teachers, parents and adolescents. As for item of 'An assaulter is entirely to blame for sexual assault', all of three groups responded in the affirmative.

• 한국치위생학회지
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• 제4권1호
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• pp.15-29
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• 2004

The purpose of this study was to understand the relationship among knowledge, attitude, and behavior of dental personnel about the defense against dental radiation according to general features, and help them recognize the importance of defense against dental radiation. A questionnaire survey of 187 dental personnel who were working in 121 medical institutions such as university hospitals, general hospitals, hospitals, clinics, and public health centers in Seoul area was conducted from December 2002 to January 2003. Study findings are as follows: 1. The average knowledge score for the defense of radiation was 9.51(full score=14): By the demographic features, the know level for the defense of radiation was appeared to be different with the occupational category, age, academic background, workplace, year of working, and whether having the education of radiation or not. By questionnaire items, the knowledge for the defense of radiation was high in general, but for the item. 'the average amount of being bombed with radiation according occupations cannot be over 20mSv in a year for prescribed 5 years'. it was 18.7%: and for the item. 'the longer the length between focus and film. the less the amount of skin exposure', it was 40.6%. showing less knowledge for these two items. 2. The average attitude score for the defense of radiation was 64.24 (full score=75): By the demographic features, the attitude score was higher with respondents who were 31-35 years old. 11-15 years of working. and having radiation education. The attitude score by questionnaire items was generally high for all the items. 3. The average behavior score for the defense of radiation was 45.43: (a) By the demographic features, the behavior score for the defense of radiation was appeared to be higher with respondents who were dentists for occupational category, the aged for age, holding higher diploma for academic background, working in the university hospitals for workplace, and having longer occupational career for the year of working. (b) The behavior score for the defense of radiation by questionnaire items was lower than that of the attitude score for all the items. For the item, 'the amount of X-ray radiation is adjusted according to such conditions as patients' age, radiating areas, and kind of films', the score was 4.03; and for the item, 'Must receive the education of safety management of radiation periodically', the score was 1.73 and it was the lowest one. 4. As for the correlation among the knowledge, attitude, and behavior for the defense of radiation, the higher the level of knowledge and attitude, the higher the level of behavior.

• 대한치과기공학회지
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• 제33권4호
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• pp.467-478
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• 2011

Purpose: The purpose of this study was to analyze dental technician's job environment and health condition level and to examine its correlation. Methods: 250 dental technicians in Seoul, Incheon, and Jeonbuk area were selected. Survey was carried out from October 11, 2010 to November 25, 2010 by using self-administered questionnaire. As for the tools for this study, the structured questionnaire was used with its proven reliability and feasibility, and the questionnaire consisted of total 49 questions which included general attribute of subjects(14 questions), job Environment(13 questions) and health condition(22 questions). The data analysis was processed by computerized system with SPSS Win 17.0. Statistical analysis techniques included frequency, percentage, T-test, One-way ANOVA analysis and regression analysis. Results: As a result of analyzing the research subjects' job environment level, there was significant difference in the item of gender, working hours a day(Hour), healthy condition, job satisfaction level with dental technician, plan for task continuity in dental technician(P<0.05). The average in the job environment was indicated to be high with 2.85. As a result of analyzing the research subjects' health condition level, there was significant difference in the item of gender, task field, working hours a day(Hour), healthy condition, job satisfaction level, plan for task continuity(P<0.05). The average in the self health recognition was indicated to be high with 2.83. Conclusion: Correlation between job environment and health condition, all of variables were indicated to have reverse correlation, thereby having been shown that the worse job environment leads to the more physical subjective symptoms.

• 대한치과기공학회지
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• 제39권4호
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• pp.285-294
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• 2017

Purpose: This study was carried out in order to examine organizational commitment in dental technicians and turnover intention level according to it, and to analyze its effects. Methods: A self-reported questionnaire survey was carried out by having convenience sampling as 200 dental technicians. An analysis of the collected data was computationally processed by using SPSS Win 19.0 program. An analytical technique was made by using statistical techniques such as frequency & percentage, t-test, One-way ANOVA analysis. The following are the analytical results of the collected materials. Results: In consequence of analyzing organizational commitment level in research subjects, there was a significant difference in the items for age, task field, job position in charge, career in dental laboratory technology, and monthly income(p<.05). The average of the item for organizational commitment level stood at 3.29, thereby having been indicated to be high. As a result of analyzing turnover intention level in research subjects, there was a significant difference in the items for task field, job position in charge, career in dental laboratory technology, and monthly income(p<.05). The average of the item for turnover intention reached 3.04, thereby having appeared to be relatively high. As for a correlation between organizational commitment and turnover intention, all variables were shown to have inverse correlation at a significant level. In consequence of conducting regression analysis in order to analyze the influence of organizational commitment upon turnover intention, a factor of having the most impact on turnover intention appeared to be normative commitment. The test value of the model was statistically significant. The explanation power about this was indicated to be 26.9%. Conclusion : In the above findings, the dental technicians are considered to need to be immersed in work with a sense of mission in performing job in charge, to strive to possibly have an opportunity of achievement and self-growth, and to perform a research and development in a manpower management strategy such as turnover prevention.

• 수산경영론집
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• 제30권2호
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• pp.25-37
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• 1999

Some multi echelon inventory systems carry perishable products. The value of these product reduces as the period of time they spend in the system. In this paper We derive the necessary condition to determine optimal quantity, service level for a perishable product. The systems considered consist of two echelons and carry single item. To determine the optimal order quantity, the demand is assumed to be constant, the holding costs may be different in the echelons, and it allows no shortages. I assumed the price of product decreases by negative exponential function. To determine service level, following assumptions used in the model ㆍlead time is constant. ㆍdemand is normal distribution. ㆍthe product starts to perish at the second echelon. Service level is computed for different levels of lead times and for different variance of demands and for different price functions. The experimental results indicate that the service level in cost is a function of service level in demand and perishability of product. Results of the models exhibit that perishability and the age of the product are critical to determine the lot sizing and service level.

• Journal of applied mathematics & informatics
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• 제26권3_4호
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• pp.615-625
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• 2008

A single item order level inventory model for perishable products is considered in which a constant fraction of on hand inventory spoils per unit time. Demand linearly depends on time. The fluctuation of demand is taken into account to determine minimum total cost of the system. Both discrete and continuous fluctuations are considered. The model is developed and solved analytically for infinite time horizon. A numerical example is presented for finite time horizon. Sensitivity analysis of the model is carried out.

• Journal of applied mathematics & informatics
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• 제5권1호
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• pp.253-261
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• 1998

(s,S) inventrory system of a perishable item with positive lead times and finite backlogs under N-policy Under this policy as and when the inventory level drops to s-N during a lead time local purchase is made. Three models are con-sidered. The limiting distribution on the inventory level is obtained and an associated cost analysis is made. Results ae numerically illustrated.

• 산업경영시스템학회지
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• 제20권43호
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• pp.99-107
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• 1997

We consider a multiechelon repairable-item inventory system where several bases are supported by a central depot and the external repair facilities. Unlike METRIC- based models, there are only a finite number of repair channels at each base, central depot and the external repair facilities. It is desired to find repair capacities and spares level which together guarantee a specified service level at minimum cost. Closed queueing network theory is used to model the stochastic process. The purpose of this paper is to derive the steady-state distributions of this system.

• 한국국방경영분석학회지
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• 제7권2호
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• pp.100-113
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• 1981

A replacement policy for a finite time span is proposed for the cumulative process where an item can fail only when the total amount of deterioration exceeds a prespecified failure level. The optimal deterioration limit level is determined to minimize the total cost expected per unit for a given time span. An illustrative example in case of periodically inspected reformer tubes in ammonia plant is also presented.