• 한국학교보건학회지
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• 제22권2호
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• pp.103-111
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• 2009

Purpose: By analyzing factors related to suicide ideation of Korean middle and high school students, the purpose of this study was to multi-dimensionally understand suicide ideation of Korean middle and high school students and arrange the plans to prevent suicide. Methods: This study used and analyzed the data on ‘The 3rd (Year2007) Korea Youth Health Risk Behavior Web-based Survey (KYHRBWS)' conducted by the Korea Centers for Disease Control and Prevention. In this study, we analyzed 74,698 respondents in total. SPSS 12.0 Program was used to analyze the survey. Descriptive statistics, Chi-Square Test and multivariate logistic regression were also used as research methods. Results: 23.8% of the Korean middle and high school students had suicide ideation during the last one year. Girls had higher possibility of suicide ideation by 1.51 times compared to boys. Students with poor academic achievement had more suicide ideation. In terms of health characteristics, students who perceived themselves as not healthy, and students with short weekday sleeping hours, more drinking experience and more smoking experience had more suicide ideation than others. Furthermore, students who perceived themselves as overweight or obese had more suicide ideation than other students. In terms of mental characteristics, students with high level of stress, low level of happiness and depression had more suicide ideation. Conclusion: As a result of this study, we found out that the factor that had the biggest influence on suicide ideation of Korean middle and high school students was depression. Consequently, active supports and policies to decrease suicide ideation of Korean middle and high school students are necessary. Therefore, active interviews, education for suicide prevention, and periodical screening inspection should be introduced in schools.

• 대한지역사회영양학회지
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• 제18권5호
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• pp.467-477
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• 2013

This study examined the health-related factors and nutritional status of 89 single women workers in their 20's who work night and day shift at the take-out coffee shops and the 89 single women office workers. The results of the study are summarized as follows: The shift-workers showed lower rate of office tenure (p < 0.001), income (p < 0.001), job satisfaction (p < 0.05), weight (p < 0.05), and higher rate of weight change (p < 0.001) than the non shift-workers. The shift-workers showed lower rate of of exercise (p < 0.001), sleeping hours (p < 0.01), and good health condition (p < 0.01), and higher rates of smoking (p < 0.001), presence of disease (p < 0.001), gastric and intestinal illnesses (p < 0.001) than the non shift-workers. More than 88.8% of the shift workers answered that they ate alone (p < 0.001). The shift workers showed lower rate of regularity of meal (p < 0.001), balanced diet (p < 0.001), and mealtime (p < 0.001), and higher rate of skipping breakfast (p < 0.001), consumption of salty and spicy food (p < 0.001), and overeating (p < 0.01) than the non shift-workers. The shift workers consumed (p < 0.001) less frequently rice, soup and side dishes, and more frequently noodles and snack, bread than the non-shift-workers. The shift workers showed lower rate of consumption of beer (p < 0.01), and higher rate of consumption of coffee (p < 0.001), tea (p < 0.01) and soju (p < 0.001) in once a week or more intakes than the non-shift-workers. The shift workers showed higher rate of consumption of carbohydrates (p < 0.05), and calcium (p < 0.05) and lower rate of consumption of protein (p < 0.05), fiber (p < 0.05), vitamin C (p < 0.05), and folate (p < 0.05) intakes than the non-shift-workers.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권11호
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• pp.5400-5418
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• 2016

Femtocells are envisioned as a key solution to embrace the ever-increasing high data rate and thus are extensively deployed. However, the dense and random deployments of femtocell access points (FAPs) induce severe intercell inference that in turn may degrade the performance of spectral efficiency. Hence, unrestrained proliferation of FAPs may not acquire a net throughput gain. Besides, given that numerous FAPs deployed in ultra-dense networks (UDNs) lead to significant energy consumption, the amount of FAPs deployed is worthy of more considerations. Nevertheless, little existing works present an analytical result regarding the optimal FAP density for a given User Equipment (UE) density. This paper explores the realistic scenario of randomly distributed FAPs in UDN and derives the coverage probability via Stochastic Geometry. From the analytical results, coverage probability is strictly increasing as the FAP-to-UE ratio increases, yet the growing rate of coverage probability decreases as the ratio grows. Therefore, we can consider a specific FAP-to-UE ratio as the point where further increasing the ratio is not cost-effective with regards to the requirements of communication systems. To reach the optimal FAP density, we can deploy FAPs in line with peak traffic and randomly switch off FAPs to keep the optimal ratio during off-peak hours. Furthermore, considering the unbalanced nature of traffic demands in the temporal and spatial domain, dynamically and carefully choosing the locations of active FAPs would provide advantages over randomization. Besides, with a huge FAP density in UDN, we have more potential choices for the locations of active FAPs and this adds to the demand for a strategic sleeping policy.

• 융합신호처리학회논문지
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• 제20권2호
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• pp.105-110
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• 2019

사람들은 일생동안 1/3을 잠을 자며 그들의 잠자는 시간은 나이에 따라 변하게 된다. 일반적으로 어른들은 하루에 8시간의 잠을 잔다. 그러나 항상 좋은 잠자리를 기대할 수는 없다. 실제로 50대 이상의 많은 사람들은 수면 문제를 가지고 있다. 이는 코골이, 수면 무호흡과 같은 수면 장애요소들 때문에 발생하는 것이다. 이 논문에서는 수면 장애요소 중 하나인 코골이를 검출하는 스마트 베개에 대해서 조사하였다. 스마트 베개는 베개의 오른쪽과 왼쪽 부분에 위치한 두 개의 마이크로폰으로 구성되어져 있다. 쉽게 코골이는 검출하기 위하여 피크 검출회로를 사용하여 코골이 신호를 펄스신호로 변형시켰으며, 펄스폭을 사용하여 코골이 이벤트 발생을 판단하였다. 측정된 코골이 검출 정확도는 약 98.6%이었다. 본 연구에서 얻은 연구 결과들이 스마트 베개가 수면 중 코골이를 검출할 수 있음을 보여 주었다.

• 대한영양사협회학술지
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• 제17권3호
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• pp.259-275
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• 2011

The purpose of this study was to determine the factors related to eating behavior of breakfast and dietary life score in elementary, middle, and high school students. This study was conducted by administering questionnaires, and data were analyzed by the SPSS program. The subjects were divided into three groups according to school group (elementary, middle, and high school). The subjects consisted of 1,879 students (male 973, female 906) from 11 schools in Kyungpook. The distribution of subjects was as follows: elementary school children 682, middle school students 702, and high school students 495. The results are summarized as follows. Dietary life score was 72.64 for elementary school students, 64.77 for middle school students, and 62.67 for high school students. Frequency of eating breakfast and reasons for skipping breakfast were significantly different according to school group (P<0.001, P<0.01, respectively). The main reason for skipping breakfast was 'habitual skip' for elementary and middle school students (54.8%, 46.7%) and 'getting up too late' in high school students (55.4%). There were no significant association between frequency of eating breakfast and BMI. However, there were significant differences in school performance and sleeping hours according to frequency of eating breakfast (P<0.001, P<0.01, respectively). Dietary life score was significantly different according to frequency of eating breakfast (P<0.001). These results stress the need for intervention programs aimed at decreasing the frequency of skipping breakfast in children and students at school. Further, those who prepares meals for children must increase their concern about preparing breakfast.

• 한국콘텐츠학회논문지
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• 제15권2호
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• pp.292-300
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• 2015

본 연구는 여대생의 체중조절행위와 비만스트레스를 파악하고자 2013년 9월 7일부터 9월 13일까지 경상남도 C시 소재 4개 대학에 재학 중인 여대생 213명을 대상으로 설문지를 배부하여 자료를 수집하였다. 수집된 자료는 SPSS 20.0 프로그램을 이용하여 빈도와 백분율, t-검증(t-test), 일원분산분석(ANOVA), 사후 검증(Scheffe's-test)을 실시하였다. 본 연구결과 대상자의 비만스트레스 정도는 $18.26{\pm}5.66$으로 중간정도로 나타났다. 대상자의 일반적 특성 및 체중조절행위 특성에 따른 비만스트레스와의 차이는 경제상태(F=3.99, p=.020), 체형인식(F=14.41, p<.001), 체형 체격 만족도(F=15.88, p<.001), 체중조절관심도(F=4.82, p=.001), 음식량 조절(F=2.41, p=.050), 체형 체격 강박(F=24.06, p<.001), 식이요법경험(F=6.04, p<.001), 평균수면시간(t=2.10, p=.036), 원하는 체중 감량정도(F=10.47, p<.001)에 따라 유의한 차이가 있었다. 따라서 여대생을 대상으로 올바른 체중인식과 체중조절 프로그램의 개발 시에는 비만스트레스와 관련한 다양한 특성들을 고려하여 개발하는 것이 필요하다.

• 동아시아식생활학회지
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• 제9권3호
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• pp.315-324
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• 1999

This study was carried out to evaluate high-school students' nutrient intakes according to the status of body mass index, and to analyze the Physical health status. The volunteers were 560 high school students in 8 provinces, but 511 students were analyzed. It was used questionnaire method as an instrument tool. The questions were composed with socio-demographic characteristics, physical health condition by CMI. and the evaluation of food consumption by 24 hours recall method. Anthrophometric measurement of height and weight was used the data of health chart of each school-class. The family situation of the subjects was mostly nuclear family(73%), agricultural work(53%), and normal living situation(75%). The students of the BMI range of 18-23 were 71%. but those of the overweight(over 23) were 15%. The individual characteristics were different in BMI. Female and third grade students were more of BMI scores. The overall nutrient intakes of students were low compared with Korean RDA of adolescent. especially iron. calcium. vitamin A, and riboflavin. The mean adequacy ratio(MAR) of nutrient intakes was 0.45$\pm$0.23 only. The energy nutrients, ash, and vitamin A intakes were significantly different according to the different BMI groups. But the other mineral and vitamin intakes were not different according to BMI. By the correlation of individual characters with BMI, height was negatively and weight and school grade were positively correlated, but sleeping time and study accomplishment were not correlated. By the correlation of nutrient intakes with BMI, there were negative correlation with the intakes of energy, carbohydrates, potassium, and thiamin. According to this results, We concluded that Korean high-school students living in rural were lower intake of nutrients(iron, vitamin A, and riboflavin) and unbalanced nutrient intakes(MAR of 0.45$\pm$0.23). The state of lower intakes of energy nutrients and vitamin A intakes in higher BMI group mean the students spend their effort to reduce BMI for avoiding obesity. But they need to balanced diet. and good nutrient intakes. These situations would be necessary for students to ameliorate quality of living in rural.

• 한국지역사회생활과학회지
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• 제22권4호
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• pp.599-613
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• 2011

This study aimed to provide an efficient time management scheme for farmers by analysing how they experience time constraints in spending their time and understand time management. Firstly, farmers found that they didn't have enough time for farm keeping as a result of house work obligations. It was caused by excessive time for agricultural work. Thus, 93.7% of respondents recognized that ‘they were pressed for time' because there is relatively less time to spend for socio-cultural and physiological matters. In addition, 83.0% responded that they felt the pressure of something. Respondents who were in forties reduced their sleeping hours due to lack of time. The majority of people who were in the farmhouse doing controlled horticulture cannot enjoy their own time for leisure owing to a lack of time. Secondly, respondents under thirty-nine years of age were solving the problems of time constraints as prioritizing matters, planning handling time and utilizing household instruments. On the other hand, respondents who were in forties found the solution by reflecting on their conduct toward a time consumption plan, self-evaluation and received help from their family and/or neighbors. A group of respondents who had already graduated from college or higher education often reflected on their conduct and self-evaluated. Respondants who participatied in farmhouse controlled horticulture, generally took turns in managing their house work. For reducing farmers' time constraints and managing their time efficiently, they should standardize matters done repeatedly and also manage time by dividing work among family members. Furthermore, if a long-term time scheme such as more than a month is established and practiced, time constraints may be somewhat solved.

• 대한간호학회지
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• 제8권1호
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• pp.99-110
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• 1978

For the study on occurrence of backache related to types of daily activities in adulthood Nine hundred twenty six adults living in Seoul were randomly selected as subjects from the eight kinds of occupation; housewives, teachers, nurses, officers, physicians, labourers, beauticians & barbers, and students. The purpose of this study was to identify various factors related to backache in daily activities and to apply these factors in clinical situations as well as in the community situations. This survey was conducted from September 21 through October 8, 1976. Under the ten hypothesis designed for this study, the. followings were obtained; 1. Significant difference on occurrence of backache was revealed according to sex difference at 0.5% level. (x$^2$= 27.85, df: 1, p<0.005) 2. Significant difference on occurrence of backache was revealed according to age groups at 2.5% level. (x$^2$= 11.13, df= 3, p<0.025) 3. Significant difference on occurrence of backache was revealed according to types of occupation at 2.5% level. (x$^2$= 18.04, df: 7, p<0.025) 4. Significant difference on occurrence of backache was revealed according to types of movement originated by hand during occupational activities at 1% level. (x$^2$= 14.23, df= 4, p<0.01) 5, Significant difference on occurrence of backache was revealed according to types f movement of legs during occupational activities at 0.5% level. x$^2$= 20.78, df: 3, p<0.005) . No significant difference on occurrence of backache was revealed according to length f daily working hours. . Significant difference on occurrence of backache was revealed according to degree of exercises at the level. x$^2$= 6.01, df= 2, p<0.05) . Significant difference on occurrence of backache was revealed according to sleeping posture at 1% level. x$^2$= 9.61, df: 2, p<0.01). Significant difference on occurrence of backache was revealed according to ordinary pattern of mean posture score at 0.5% level. (t : 4.27, df: 924, p<0.005) 10. Significant difference was revealed mean posture scores according to period of backache history at 0.5% level. (f- ratio = 3.73, df= 4, 562 p<0.005).

• Journal of Community Nutrition
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• 제2권2호
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• pp.119-128
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• 2000

Lifestyle and dietary behavior intervention as the primary prevention of lipid disorder seems safe and compatible with other treatments of cardiovascular diseases. Cross-sectional associations between lifestyle factors and dietary behavioral factors with plasma lipid and lipoprotein levels were analyzed in 189 middle-aged men in Suwon, Korea. Overnight fasting plasma levels of total cholesterol, high-density lipoprotein(HDL)-cholesterol, triacylglycerol and glucose were analyzed. Blood pressure and anthropometric data were also measured. Lifestyle factors such as smoking status, alcohol consumption and frequency of physical exercise were evaluated by a self-administered questionnaire. Questions regarding dietary behavior were also asked. The subjects were 43.8%${\pm}$7.9 years old, and 23.8%${\pm}$2.6kg/m$^2$. From stepwise regression analyses, significant correlates with total cholesterol level were body mass index(BMI), alcohol intake(negative), age and coffee drinking(model R$^2$=14.3%). BMI, breakfast-skipping, age, and sleeping hours were significant for triacylglycerol level(model R$^2$=15.8%). BMI, alcohol drinking(negative), age, and coffee drinking were significant for low-density lipoprotein(LDL)(model R$^2$=11.7%). Age(negative), BMI(negative), alcohol drinking, stress level(negative), physical exercise, and cigarette smoking(negative) were significant for high-density lipoprotein(HDL)(model R$^2$=12.1%). From stepwise regression analyses, excluding BMI and age as factors in the model, alcohol intake(negative) and coffee drinking were significantly correlated with total cholesterol level(model R$^2$=4.4%) : breakfast-skipping with triacylglycerol(model R$^2$=3.2%) : alcohol intake (negative) with LDL level(model R$^2$=3.4%) : alcohol intake, physical exercise and stress level(negative) with HDL level(model R$^2$=6.3%). The findings suggest that a healthy daily lifestyle and dietary behavior may have an anti-atherogenic effect by altering plasma lipid and lipoprotein levels in middle-aged Korean men. (J Community Nutrition 2(2) : 119∼128, 2000)