• Communications for Statistical Applications and Methods
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• 제16권1호
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• pp.67-74
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• 2009

고품질 한우를 만들기 위해 여러 경제형질에 영향을 주는 유전자 즉 single nucleotide polymorphisms(SNPs)를 규명하려고 한다. 이미 Lee 등 (2008a)에 의해 SNP(19_1)$^*$SNP(28_2)가 등심단면적 (LMA: longissimus muscle dorsi area)에 주요한 유전자로 규명되었다. 여기에 추가로 도체중 (CWT: carcass cold weight)과 일당증체량 (ADG: average daily gain)을 선형 모형에 적용하였으며 또한 상호작용에 더 유리하고 연속형 데이터에도 사용할 수 있는 expanded multifactor dimensionality reduction (expanded MDR)을 이용하여 주요한 SNP를 파악하였다. Expanded MDR 적용결과 등심단면적과 같은 결과인 SNP(19_1)과 SNP(19_1)$^*$SNP(28_2)의 상호작용 형태가 가장 좋은 SNP로 선정되었으며, 최종적으로 SNP(19_1)*SNP(28_2) 마커가 한우의 여러 경제형질에 우수 유전자임을 규명하였다.

• 동아시아식생활학회지
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• 제18권1호
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• pp.149-157
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• 2008

This study examined the cost consciousness, food materials satisfaction, job satisfaction, and degree of food materials management of chefs, as a means to increase food materials management efficiency in hotel restaurants and to make suggestions, for efficiently reducing food material costs, Chefs from eleven 5-star hotels and one exceptional-grade restaurant in Seoul were asked to fill out a questionnaire for sampling. A total of 350 questionnaires were distributed and 334 were returned (95.4% return rate). The characteristics of the respondents were examined by population statistics analysis, and the chefs' cost consciousness, food materials satisfaction, and job satisfaction were examined by descriptive statistics after reliability and propriety analyses. The degree of cost consciousness in the respondents was very high and this degree of consciousness proved to have a partially significant impact on the degree of food materials management. That is when the chefs were more conscious about cost, the degree of food materials management was high. This implies that food materials satisfaction can be enhanced by enhancing the degree of food materials management. Job satisfaction also had a partially significant, influence on the degree of food materials management. Therefore, it is necessary to maintain consistency in the quality and inspection of food materials, provide related information, enhance the satisfaction level for standards of food materials and improve policies for welfare and career after retirement in order to enhance the job satisfaction of chefs and subsequently reduce costs in relation to the level of food materials management.

• Journal of the Korean Data Analysis Society
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• 제20권6호
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• pp.2933-2940
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• 2018

과일의 경우 다른 작물보다 날씨의 영향을 많이 받으므로, 농업인의 고부가가치 창출을 위해서는 날씨를 고려한 작물모형개발이 필요하다. 본 연구에서는 과실류 중에서 비교적 제한된 조건에서 생산되는 복숭아를 연구대상으로 선정하였으며, 옥답 4.0에서 제공하는 2015년부터 2017년까지 대구에서 거래된 복숭아자료를 사용하였다. 분석에 사용되는 기상자료는 재배면적에 대한 가중치를 부여하여 생성하였으며, 1일 전부터 7일 전까지 날씨자료 중 상관성이 높은 변수를 사용하였다. 분석 방법으로는 기계학습법에 해당하는 랜덤포레스트와 그래디언트부스팅(gradient boosting machine), XGboost을 사용하였다. 분석결과, XGboost의 성능이 가장 우수하게 나타났으며, 경락가격 예측은 비교적 잘 예측할 수 있었지만, 거래량 예측의 정확성은 그리 높지 않았다. 복숭아 거래량 예측에 영향을 미치는 상위 3개의 기상변수로는 최저온도, 평균최대온도, 강수량으로 나타났다.

• 한국전자통신학회논문지
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• 제16권3호
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• pp.465-470
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• 2021

잡음이 존재하는 실제 환경에서 음성인식을 실시하는 경우에 음성인식의 성능 열화 및 음성의 품질이 저화되지 않는 강건한 음성인식 기술이 필요하다. 이러한 음성인식 기술을 개발함으로써 사람의 음성 스펙트럼과 유사한 잡음 환경에서도 안정되고 높은 음성인식률이 실현되는 어플리케이션이 요구된다. 따라서 본 논문에서는 최소 평균 제곱의 오차를 기반으로 한 단시간 스펙트럼 진폭 방법인 MMSA-STSA 추정 알고리즘에 기초한 잡음억압을 처리하는 음성강조 알고리즘을 제안한다. 이 알고리즘은 단일 채널 입력에 기초한 효과적인 비선형 음성강조 알고리즘이며, 높은 잡음억제 성능을 가지고 있으며 음성의 통계적인 모델에 기초하여 음성의 왜곡량을 줄이는 기법이다. 본 실험에서는 MMSA-STSA 추정 알고리즘의 유효성을 확인하기 위하여 입력 음성파형과 출력 음성파형을 비교하여 제안한 알고리즘의 효과를 확인한다.

• 한국학교보건학회지
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• 제31권2호
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• pp.70-78
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• 2018

Purpose: This study investigated the predictors of Sexually Transmitted Infections (STI) among female teenagers in Korea who have had intercourse at least once. Methods: This study is based on the 12th Korea Youth Behavior Web-based Survey conducted in April 2016. Data were collected from 798 middle schools and high schools nationwide in Korea and 65,528 students participated. Among the participants, the subjects of this study were 537 female high school students (Grade 10~12). The data were analyzed through complex samples multiple logistic regression using SPSS statistics 22. Results: Among the 537 female adolescents, 11.9% replied they had experienced STI. The predictors of STI among the subjects were 'age at first intercourse' and 'sexual intercourse after drinking'. The risk of STI was lower in the middle (OR=0.26, 95% CI=0.10~0.64) and high school (OR=0.11, 95% CI=0.04~0.27) age groups than those who had their first sexual intercourse at an elementary school age. The sexual intercourse after drinking group had a higher risk of STI, compared to the no sexual relation after drinking group (OR=2.54, 95% CI=1.28~5.07). Conclusion: Practical sex education programs should begin from the elementary stage in order to protect more female adolescents from STI. In addition, sex education including an alcohol prevention program should be considered to lower STI among female adolescents.

• 한국보건간호학회지
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• 제28권2호
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• pp.320-332
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• 2014

Purpose: This study was conducted in order to examine premenstrual symptoms (PMS) according to physical activity of high school girls. Method: Data were collected from 323 high school girls using structured questionnaires, Menstrual Distress Questionnaire (MDQ) and International Physical Activity Questionnaire (IPAQ). The data were analyzed using descriptive statistics, t-test, and AVOVA. Results: The mean score of PMS was low (2.200.81). Among the subcategories, negative feeling (2.491.26) was the highest. Physical activity levels were coded as inactive, minimal activity and health enhancing physical activity, among which minimal activity (53.0%) was the highest. Significant differences in PMS were observed according to subjective health condition (F=10.83, p<.001), alcohol intake (t=-1.99, p=.048), caffeine intake (F=3.04, p=.029), dietary habit (F=4.78, p=.009), amount of menstruation (F=4.57, p=.011), discomfort in daily life (F=28.94, p<.001), degree of menstrual pain (F=41.23, p<.001), method of menstrual pain relief (F=4.29, p=.015), and family history (F=11.45, p<.001). Significant difference in PMS was observed according to the physical activity level (F=3.12, p=.046), and health enhancing physical activity (2.540.87) was the highest. Conclusion: These findings suggest that PMS intervention programs would be considered factors related to PMS. Conduct of further studies is recommended for evaluation of the relationship between physical activity and PMS.

• 한국의류학회지
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• 제27권7호
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• pp.789-799
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• 2003

The purpose of this study was to find out clothing evaluation criteria and purchase intention according to consumers' shopping orientation and demographic factors when they shop online. The subjects were 240 men and women living in the metropolitan area. For data analysis, factor analysis, cluster analysis, ANOVA, t-test, Duncan test and descriptive statistics were conducted. The results are as follows: 1. Important clothing evaluation criteria were considered in order of price, style, fit, size and product guarantee etc. Purchase intention was showed more highly when products are related to low involvement than high involvement. 2. Consumers with high hedonic and utilitarian shopping orientation considered clothing evaluation criteria more importantly but showed low level of purchase intention in cyber shopping. And consumers with low hedonic and utilitarian shopping orientation considered clothing evaluation criteria less importantly but showed high level of purchase intention in cyber shopping. 3. There were significant differences in evaluation criteria and purchase intention according to demographic variables. Especially women considered evaluation criteria more importantly and had higher level of purchase intention than men.

• 복식
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• 제50권8호
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• pp.87-97
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• 2000

The purposes of this study are to classify the male consumers in new generation by evaluating the fashion mania elements and to examine the differences among consumer groups in product attributes, benefits, dressing for self and others, and sensation seeking tendency. Fashion mania elements are compose of purchase frequency, the storage of clothes, the affection toward clothes and fashion knowledge. Data were obtained from 492 adult male living in Seoul and Kyunggi Do. Statistics used for data analysis were frequency, means, one-way Anova, Duncan's multiple range test, factor analysis, cluster analysis using Spss 9.0. The results can be summarized as follows: There consumer groups are identified based on the fashion mania elements: fashion mania, fashion interests, non-fashion mania. The fashion mania group has positive fashion behavior and high fashion attitude, the fashion interests group has high fashion attitude and light fashion behavior, non fashion mania group has light fashion attitude and behavior. Fashion mania group regard intrinsic attributes very highly in order to express individuality, shows the tendency to dress for self strongly rather than to dress for others. And fashion mania group shows a high sensation seeking tendency compared with the remaining groups.

• 한국간호교육학회지
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• 제21권3호
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• pp.406-416
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• 2015

Purpose: This study investigated sexual knowledge, its related factors, and the needs of sex education among elementary, middle, and high school students in order to develop a sex education program. Method: The participants comprised 721 students in grades 5 through 12, from Seoul and the Kyeonggi-do area, in South Korea. Data was collected from the end of August through the end of September 2014, using an anonymous self-administered questionnaire. SPSS Statistics 21.0 was used for the descriptive analysis, chi-square, t-test, ANOVA, and multiple regressions. Results: Higher-grade students had a higher level of sexual knowledge than lower-grade students, but the overall level of sexual knowledge was low. Multivariate analysis showed that gender, grade, school record, and experiences of sex education from family and school were significant predictors of sexual knowledge among adolescents. Coping skills related to sexual crisis situations was the most wanted content of sex education. Conclusion: The results of this study suggested that it is important to develop a sex education program that considers the needs of sex education among adolescents. Also, it is important to periodically perform a survey to identify the need of sex education among elementary, middle, and high school students.

• Child Health Nursing Research
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• 제17권1호
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• pp.31-38
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• 2011

Purpose: The purpose of this study was to analyze factors affecting meaning of life in adolescents. Methods: Data were collected from April 5 to June 20, 2010. The participants for this study were 343 Korean middle and high school students, recruited from four middle and high schools located in Seoul. Data collection was conducted through the use of 7 questionnaires. The data were analyzed with the SPSS WIN 12.0 program using descriptive statistics, ANOVA, Pearson correlation coefficients and stepwise multiple regression. Results: 1) The mean total item score for the meaning of life scales was 2.99, which was slightly high. 2) There was a significant relationship between meaning of life and self-esteem, self control, parenting attitude, family satisfaction, school adjustment, and career maturity. 3) Stepwise multiple regression analysis showed that self-esteem, family satisfaction, school adjustment, parenting attitude and career maturity were predictors of meaning of life and accounted for 57.1% of the variance in meaning of life. Conclusion: Self-esteem, family satisfaction, school adjustment, parenting attitude and career maturity were variables influencing meaning of life in adolescents. These results indicate a need to develop nursing interventions to increase self-esteem, family satisfaction, school adjustment, parenting attitude and career maturity in order to improve meaning of life for adolescents.