• Korean Journal of Environment and Ecology
• /
• v.8 no.2
• /
• pp.150-153
• /
• 1995

A Pinus densiflora forest in Chuwangsan was studied to determine the adequate plot area of shrub stratum for investigating forest community structure. Nineteen nested plots were set up in the studied forest, and species-area curve and performance curve were established. According to species-area curve, the minimum plot area where a given percentage increase in plot area produced less than the same percentage increase in number of species was 900$m^2$. The minimum plot area where a given percentage increase in plot area produced less than the half of the percent-age increase in number of species was 1,500$m^2$. According to performance curve of the importance values of the major species, the minimum plot area where the importance value of the major species was distinguished from each other was 1,400$m^2$. According to performance curve of species diversity, the minimum plot area was 750-1,500$m^2$. Similarity indices between plot area above 900$m^2$ and total plot area were more than 90% and similarity indices between plot area above 625$m^2$ and total plot area were more than 85%. It may be given as a conclusion that minimum plot area was about 1,500$m^2$ in case of requiring more accuracy.

• Journal of Korean Clinical Health Science
• /
• v.1 no.1
• /
• pp.47-61
• /
• 2013

Purpose. Effective health policy to raise education rate and to provide basic data to identify the college of Education degree and CPR. Purpose of this study was to inform the need for retraining of college students received CPR training. Methods. The sample consisted of 70 a series of health related university students and 70 the general college students ; total 120 in J city. The period of data collecting was from November 1st to Nov. 16th. The tools were 24 questionnaires named "CPR Survey". The collected data were analyzed to get frequency, percentage, average, and standard deviation, t-test and Person's correlation coefficients by using of SPSS for WINDOW 12.0 K program. Results. The number of CPR-trained persons was significantly higher in the health related university students than general college students. Conclusions. CPR training after the passage of time, the percentage of correct answer got lower as time goes by. The answer should be 'School formal education' was the highest. The percentage of students who recognized the necessity of CPR re-education was high.

• 한국HCI학회:학술대회논문집
• /
• 2006.02b
• /
• pp.633-638
• /
• 2006

We investigated the importance and efficiency of active and passive exploration on the recognition of objects in a variety of virtual environments (VEs). In this study, 54 participants (19 males and 35 females) were randomly allocated into one of two navigation conditions (active and passive navigation). The 3D visual display was presented through HMD and participants used joysticks to navigate VEs. The VEs consisted of exploring four rooms (library, office, lounge, and conference room), each of which had 15 objects. 'Active navigation' was performed by allowing participants to self-pace and control their own navigation within a predetermined time limitation for each room. 'Passive navigation' was conducted by forced navigation of the four rooms in random order. Total navigation duration and objects for both navigations were identical. After navigating VEs, participants were asked to recognize the objects that had been in the four rooms. Recognition for objects was measured by response time and the percentage of correct, false, hit, and miss responses. Those in the active navigation condition had a significantly higher percentage of hit responses (t (52) = 4.000 p < 0.01), and a significantly lower percentage of miss responses (t (52) = -3.763, p < 0.01) in object recognition than those in the passive condition. These results suggest that active navigation plays an important role in spatial cognition as well as providing a better explanation about the efficiency of learning in a 3D-based program.

• Geomechanics and Engineering
• /
• v.32 no.5
• /
• pp.483-494
• /
• 2023

High-speed trains became common nowadays due to the need for fast and safe mean to transport goods and people. However, the use of high-speed trains necessitates the examination of the critical speed, which is the train speed at which the maximum settlement of the railway track occurs. The critical speed and railway track settlement have been investigated considering only one train in previous studies. However, it is normal to have two adjacent trains moving at the same time. This paper aims to understand how the interference of two moving trains affects the settlement and critical speed of ballasted railway track. Calibrated three-dimensional finite element models of railway track subjected to one moving train and two moving trains have been developed to address the aim of the study. It is found that the interference dramatically increases the railway track settlement with a percentage increase ranges between 5 and 100%. It is also found that the percentage increase of the railway track settlement depends on the train speed and the distance between the moving trains. In addition, it is found that the thickness of the ballast layer and the stiffness of the subgrade have minor influence on the percentage increase of the settlement. Importantly, the results of this paper illustrate the importance of the interference of the moving trains on the dynamic response of the railway track. Thus, there is a need to consider the dynamic interaction between the adjacent moving trains in the design of railway track foundation.

• Journal of Korean Academy of Nursing
• /
• v.54 no.1
• /
• pp.18-31
• /
• 2024

Purpose: This study aimed to investigate the impact of anthropometric indices of obesity (body mass index [BMI], waist circumference, waist hip ratio, and body fat percentage) on the incidence of hypertension in adults with prehypertension. Methods: A longitudinal study design using secondary data form the Korean Genome and Epidemiology Study was employed. The study included 1,838 adults with prehypertension tracked every two years from 2001 to 2018. Statistical analyses, including frequency assessments, number of cases per 1,000 person-years, log-rank tests, Kaplan-Meier curves, and Cox's proportional hazards regression, were conducted using SPSS version 25. Results: Over the observation period (15,783.6 person-years), 1,136 individuals developed hypertension. The incidence of hypertension was significantly higher in the obesity groups defined by BMI (hazard ratio [HR] = 1.33), waist circumference (HR = 1.34), waist hip ratio (HR = 1.29), and body fat percentage (HR = 1.31) compared to the non-obese group. These findings indicate an increased risk of hypertension associated with obesity as measured by these indices. Conclusion: The study underscores the importance of avoiding obesity to prevent hypertension in individuals with prehypertension. Specifically, BMI, waist circumference, waist hip circumference, and body fat percentage were identified as significant risk factors for hypertension. The results suggest the need for individualized weight control interventions, emphasizing the role of health professionals in addressing the heightened hypertension risk in this population.

• Asian-Australasian Journal of Animal Sciences
• /
• v.5 no.3
• /
• pp.495-503
• /
• 1992

The internal and external outputs of the agricultural sub-systems of mixed livestock-crop farms in Pabna Bangladesh were analysed, to clarify the multiple functions of cattle in farm systems. Production systems with grazing areas were relatively more productive than those with no grazing. There was a tremendous variation in farm income, largely because of land area. An increase of one ha in land area was estimated to boost farm income by about 50%. Number of cattle, cattle off-take percentage and milk off-take per average cow related positively to farm income. As land area decreased the relative importance of cattle production increased. Crops were dominant in producing food for home consumption. Cattle contributed only 5-6 per cent to home consumption. Cattle supplied a significant cash income: 45 per cent in the villages with grazing areas and 57 per cent in the other villages. In future, the cash output from cattle will decline and emphasis will shift to the role of cattle in supporting crop production. Any research or development strategy for livestock needs to focus first on the importance of the complex relation between livestock and crops.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.25 no.1
• /
• pp.183-194
• /
• 2001

The purpose of this study are to systematize the concept on apparel store service and to provide the importance of each service according to the shopping types as well as demographic characteristics of consumers. The data was collected from 628 females and analyzed by factor analysis, reliability analysis, mean, percentage, cluster analysis, ANOVA, Duncan test, paired t-test, and t-test. The results are as follows: 1) All apparel stores consist of two categories, Products and Services. The products obviously entail whatever the store is selling. The services, on the other hand, can be broken down into three different factors of responsibility: public relations service, store environmental service, and promotional service. 2) Consumers can be classified into one of four categories: conventional type, practical type, recreational type, and casual type. 3) A recreational type and a practical type shoppers take into consideration all three service factors. The conventional and casual type shoppers, as compared to the recreational or practical type shoppers, arent really concerned with much of anything, least of the promotional service factor. 4) It has been found that the typical Korean consumer is more concerned with the public relations service factor, rather than the store environmental service factor or promotional service factor. 5) It has been found that the importance of services are significantly different in relation to the demographic characteristics, whether that be age, marital status, or the age of the youngest child.

• Journal of the East Asian Society of Dietary Life
• /
• v.26 no.2
• /
• pp.141-151
• /
• 2016

This study looks into the relationship between mother's nutrition knowledge and the actual situation of snacks consumption by mothers living in Daegu and Gyeongbuk. The data were analyzed by statistical methods such as frequency, percentage, Chi-square, ANOVA and Duncan with the SPSS Windows 19.0 program. Regarding level of education, most of the subjects in the 'High' and 'Medium' Groups were university graduates, whereas most of those in the 'Low' Group were college graduates. Most of the subjects ate used processed snacks, produced snacks, or cooked snacks themselves, and most added fruits, followed by milk products and confectionery as snacks. Most of the subjects were satisfied with their experiences of purchasing snacks for children. In selecting the snacks, most of them attached importance to 'balanced nutrition', followed by 'food additives', 'allergy', and 'sanitation.' These results show that nutrition education is necessary for choosing correct and good quality snacks for children.

• The Research Journal of the Costume Culture
• /
• v.4 no.2
• /
• pp.173-185
• /
• 1996

The purpose of this study was to identify the relationship of clothing involvement and clothing buying behavior of women. A questionnaire was developed to measure clothing involvement, clothing purchasing motives, clothing purchasing criteria, fashion information sources, store selection criteria, and demographic characteristics. The questionnaire was administered to 430 female adults in Taegu. The data were analyzed using percentage, frequency, factor analysis, and t-test. The results of the study were s follows: 1. Subjects were divided into low clothing involved and high clothing involved groups. 2. Three dimensions of clothing purchasing motives were derived by factor analysis such as Aesthetic dependant, Impulsive, and Practical motive. Clothing purchasing criteria were factor analysed as Aesthetic, Qualitative, External, and Economical criterion. Fashion information sources were factor analysed as Printed & audio-visual oriented media, Marketer intensive search, Store search, Observation & Interpersonal search, and Experience. Store selection criteria were factor analyzed as Merchandise & Store atmosphere, Store convenience, and Brand & fashion. 3. There were significant differences between high involved and low involved consumers in clothing purchasing behavior. The high involved consumers showed more importance than low involved consumers about purchasing criteria expecially in aesthetic dependant. The high involved consumers put more importance to aesthetic, qualitative, and external criterion as clothing purchasing criteria. The high involved information sources. The high involved consumers were more concerned about merchandise & store atmosphere, and brand & fashion than low involved consumers in store selection criteria.

• Women's Health Nursing
• /
• v.5 no.3
• /
• pp.313-326
• /
• 1999

This study sought to find out the level of perception of postpartal care and the meaning and opinion of traditional postpartal care (Sanhujori) from health professional. The subjects were 188 health professionals who work at University hospital, clinics, Oriented clinics, and midwifery clinics in Seoul and Chung-Buk, Korea. Data were collected from 8th April, 1999 to 6th May, 1999. The data were analyzed through the SPSS program by use of frequency, percentage, t-test, ANOVA and Scheffe test as a post hoc contrast, $x^2$-test, and stepwise multiple regression. The results of the study were as follows: mean age of the subject was 33.0 years and female was 58.0%. Occupation of the subject was nurse 28.7%, doctor 22.3%, midwife 21.3 Korean Oriental doctor 27.0%. Mean period of career was 7.6 years and the subject who experienced Sanhujori was 54.3%. The subject who did not know 6 principles of Sanhujori was 73.9%. In the opinion on traditional Sanhujori method 68.1% of respondents expressed that Sanhujori is scientific postpartal care which fits Korean people's physical constitution and culture. On the opinion of effective postpartal care in 97.9% of respondents expressed that it is to in hospital postpartal care and traditional Sanhujori perform it according to Korean culture constitution. On the opinion of Sanhujori, 96.6% of respondents expressed that it is necessary to understand Sanhujori with consideration which was adapted to Oriental culture and to verify it through continual study. On the opinion of the effect of the level of performance of Sanhujori upon women's health life, 43.2% of respondents expressed that the level of performance of Sanhujori has great effect on women's general health, including postpartal recovery, Sanhujori prevention, and so on. On the opinion of Sanhujori of women who undergo Caesarean operation, 57.7% of respondents expressed that women who undergo Caesarean operation perform Sanhujori with more attention. On the opinion of Sanhujori center (sanhujorwon), 56.3% of respondents expressed that the center is necessary for women's health and health professional are required to manage the center scientifically. On considering the level of importance of post care according to occupation, midwife showed highest level of importance of traditional Sanhujori doctor the lowest level. Midwife showed the hi level of importance of postpartal care and K Oriental doctor showed the lowest level of importance of women's postpartal care. On considering the relationship between the level of importance of postpartal care and general characteristics, sex, career, clinical department and whether they know 6 principles of Sanhujori or not were statistically significant at the level of 5%. In the stepwise multiple regression analysis, the main influencing variables on the level of importance of postpartal care were occupation, sex, and clinical department. In conclusion, this finding confirmed that professionals were considering the traditional Sa importantly for women's health. Above all things necessary for health professional to integrate concept of traditional Sanhujori into practical nu intervention program, to apply it to profes practices in order to reestablish effective integrative postpartal caring system, and to Sanhujori scientific through performing continual research.