• Journal of Animal Environmental Science
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• v.1 no.1
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• pp.39-45
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• 1995

Temperatures of blood and skin, respiratory rate and plasma cortisol concentration in sheep at a warm (average ambient temperature of $15.3^{\circ}C$) and a hot (average ambient temperature of $27.0^{\circ}C$ environment were measured to investigate the effect of hot environment on the physiological responses in ruminant. Temperatures of core, mean skin and mean body in sheep were tended to increase at day time and to decrease at night time at both warm and hot environment, while 24-hr average for those temperatures were significantly higher at hot environment than at warm environment (P<0.05). The calculated body heat content was higher in sheep at hot environment than at warm environment (P<0.05). Respiratory rate and plasma cortisol concentration had no significant differences between warm and hot environment, suggesting that sheep were not stress by the hot environment in this experiment. It is, therefore, suggested that sheep were well adopted to hot environment by increasing body heat content against heat stress.

• Proceedings of the SAREK Conference
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• 2009.06a
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• pp.561-564
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• 2009

This study is to examine the possibility of pre-cooling at platform. Through measurement of the thermal environment of Bujeon Subway platforms, review the potential use of ground-water and night purge. The results of this research can improve the thermal environment pre-cooling of the design.

• Journal of the Korean Society of Costume
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• v.65 no.6
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• pp.36-47
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• 2015

The purpose of this study is to provide essential information conducive to designing efficient cycling apparel for everyday wear. To this end, this study identified key situations that cyclists face while riding their bicycles as well as clothing functions that are necessary for each situation. Furthermore, this study also analyzed the current trends in cycling apparels and hybrid designs. In order to analyze the current trends of clothing functionality in domestic and foreign cycling apparel brands, the researchers of this study first reviewed existing literature on the functionality of cycling clothing. Then a focus group, which comprised of two experts in cycling fashion brands and fourteen consumers, was formed and in-depth interviews were conducted to identify the major conditions related to bicycle riding. Based on the results of the interview, the study, then, classified 700 images of cycling clothing from exhibitions and 1,541 images of cycling clothing that were launched by domestic and foreign fashion brands. The results of this study were as follows. First, there were three major conditions in bicycle riding: night riding, weather changes and riding convenience. Second, functionalities required for each riding condition were as follows: visibility for night riding, comfort, waterproofness and heat preservation properties for weather changes, and elasticity, protective properties and storage capacity for riding convenience. Finally, hybrid designs for each riding condition were different from general designs.

• Korean Journal of Ecology and Environment
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• v.34 no.2 s.94
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• pp.133-139
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• 2001

For elucidating the effective management for nutrients removal by the phytoplankton growing at the effluents of night soil and sewage treatment plant, the dilution rates, physical operation conditions and duration of culture were defined. For nutrients removal from effluent of night soil treatment plant, lower the dilution was better, and Scenedesmus sp. was dominant. For removal from the effluent of sewage treatMent plant, the proper operation conditions were 50% of dilution rate, stirring and 2 days culturing. With these conditions, the removal rate of TKN was 88%, DIP$70{\sim}80%$ and the chlorophyll concentration reached at $1,300\;mg/m^3$ chlorophyll a concentration. the variation of chlorophyll a was highly corrrlated with ammonia ($r^2\;=\;0.96$) and DIP ($r^2\;=\;0.92$).

• Journal of the Korean GEO-environmental Society
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• v.15 no.9
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• pp.13-18
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• 2014

BMP test was carried out to evaluate the characteristics for co-digestion of night soil and food waste. 6 types of sludge were tested in 30 days which were raw, excess, digested, night soil/septic tank (1:1), food waste (food : dilution water = 1:1), and mixed sludge. Bio gas was produced actively after 2 days, and continued in 2 weeks. Gas generation amount was decreased rapidly after considerable space of time. Especially maximum productivity of gas was shown in 7~8 days. The ultimate methane yields of raw, excess, digested, night soil/septic tank, food waste, and mixed sludge were 64.63, 67.49, 66.45, 72.44, 107.85, and 46.71 mL $CH_4/g$ VS respectively from Modified Gompertz model. The lag growth phase time and maximum specific methane production rate of mixed sludge were 1.88 day and 80.4 mL/day respectively. The methane potential of mixed sludge was higher than individual sludge. So high methane potential was expected by controlling mixing ratio of food waste. Besides stable operation of digestion tank and the solution of oligotrophic problem were possible.

• Journal of Korean Society for Atmospheric Environment
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• v.16 no.5
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• pp.511-520
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• 2000

The urban atmosphere is characterized by th difference in surface and atmospheric environment between urban and more natural area. To investigate th climatic effect of land use type and anthropogenic heat of urban on wind field, numerical simulations were carried out under typical summer synoptic condition. The wind model PNU_MCM(Pusan National University Mesoscale Circulation Model) is based on the three-dimensional Boussinesq equations, taking into account the hydrostatic assumption . Since lane-use differs over every subdivision on Pusan the surface energy budget model includes sub0grid parameterization scheme which can calculate the total heat flux over a grid surface composed of different surfaces. The simulated surface wind agrees well with the observed value, and average over 6 days which represent typical summer lan-sea breeze days, August 1998, i.e. negligible gradient winds and almost clear skies. Urbanization makes sea-breeze enhance at day and reduce land-breeze at night. The results show that contribution of land-use type is much larger than that of anthropogenic heat in Pusan.

• Proceedings of the SAREK Conference
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• 2008.06a
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• pp.877-882
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• 2008

The purpose of this study is to analyze the characteristics of outdoor thermal environment of flat-type apartment houses and tower-type apartment houses in summer by numerical simulation. After inputting a building condition at CAD, we calculated the surface temperature for two apartments by using the numerical simulation of a clear sky day in summer in Seoul. The results indicated that the variation in Heat Island Potential(HIP) of tow apartments were not only in the day but also in the night. According to form of apartment the flat-type apartment houses appeared $1.3^{\circ}C$ more highly tower-type apartment houses.

• Journal of Korean society of Dental Hygiene
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• v.18 no.3
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• pp.295-310
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• 2018

Objectives: The purpose of this study is to identify the factors affecting job satisfaction, job stress, turnover intention, work-family and family-work relationship of married dental hygienists with young children. Methods: 242 copies of self-reported questionnaires were analyzed. Statistical analysis of collected data was conducted using the statistical program of Stata 13.0 (StataCorp., College Station, TX, USA). Results: Turnover intention was higher when the child age was lower and the child support and parenting stress were higher. But when working hours were adjustable, the turnover intention was low. Job stress was higher as the position, monthly income and night working hours were higher. Job satisfaction was higher as night work was fewer, work time was adjustable and family life satisfaction was higher. When parenting stress was high, job satisfaction was low and job stress and turnover intention were high. Work-family relationships were more affected by lower monthly income and parents-first child caregivers. Workplace factors affecting the family life were monthly income, caregiver and number of night work. The higher the parenting stress, the greater the mutual influence between family and work life. Age, family life, parenting stress and turnover intention were identified to affect family-work relationship. Parenting stress and job stress were identified to be influential on work-family relationship. Conclusions: Married dental hygienists are leaving the clinical setting due to their marriage and childbirth, or showing the effects on family-work and work-family relationships due to parenting. Efforts should be made to efficiently utilize professional manpower and to improve the psychological and physical working environment surrounding the married dental hygienists.

• Journal of Environmental Science International
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• v.28 no.12
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• pp.1101-1110
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• 2019

This study investigated Post-Occupancy Evaluation (POE) of cherry blossom trails 'Cherry Road' in Daegu Catholic Univ. campus, at Gyeonsan-city, Korea. The evaluation focused on image preference and satisfaction of users i.e., students, using questionnaire surveys. A total 201 questionnaire samples were analyzed and most of the respondents were in the age group of 20. Frequency analysis was conducted on demographics, use behavior, reliability, and means. Factor analysis and multiple regression analysis were conducted for user satisfaction and image preference. Over 80% of visitors came with companions during daytime. The most common motives for use were strolling and walking, event and meeting, passing. For user satisfaction the mean scores were highest for landscape beauty (4.22), image improvement (4.14), campus image (4.08). Night lighting facility received the lowest score (3.32). Factor analysis concerning user satisfaction was categorized into environment-human behavior and physical factors. Multiple regression analysis showed that the overall satisfaction of user was significantly influenced by five independent variables: 'harmonious' (β=.214), 'night lighting facility' (β=.173), 'landscape beauty' (β=.208), 'lawn care' (β=.154), and 'walking trails' (β=.123). The mean scores of image variables were highest for 'beautiful' (5.81), 'bright' (5.67), and 'open' (5.64). The lowest scores was for 'quiet' (4.47). Exploratory factor analysis led to three factors being categorized: aesthetics, comforts, and simplicity. Result of multiple regression analysis indicated that the preference of space image was significantly influenced by five variables: 'bright' (β=.397), 'refreshing' (β=.211), 'cool' (β=.219), 'clean' (β=.182), and 'natural' (β=.-142). Hence, Cherry Road has a high level of user satisfaction and image evaluation, which is interpreted as having various cultural events and value for students on campus. To improve the satisfaction of Cherry Road in the future, it is necessary to secure night lighting, to manage trash cans, and to secure rest space.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.05a
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• pp.423-424
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• 2021

In this paper, we propose a system that collects data from sensors that detect the sleeping environment and adjusts the sleeping environment optimally based on the environment to help you get a good night's sleep. The sleep environment analysis is based on the determination of the sleep stage by detection of twisting through the load cell. In addition, based on data such as temperature, humidity, and illuminance, heat devices, humidifiers, blinds, etc. are controlled to create an environment in which to have a good sleep. The sleep environment control according to the sleep state can reduce fatigue when waking up by inducing a sleep state that is easy to wake up.