• Title/Summary/Keyword: Physical environment quality

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Characterization of Physical Properties of Turbid Flow in the Daecheong Reservoir Watershed dining Floods (홍수시 대청호 유역에 발생하는 탁수의 물리적 특성)

  • Chung, Se Woong;Lee, Heung Soo;Yoon, Sung Wan;Ye, Lyeong;Lee, Jun Ho;Choo, Chang Oh
    • Journal of Korean Society on Water Environment
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    • v.23 no.6
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    • pp.934-944
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    • 2007
  • Fine suspended solids (SS) induced into a reservoir after flood events play important ecological and water quality roles by presenting persistent turbidity and attenuating light. Thus the origin and physical features must be characterized to understand their transport processes and associated impacts, and for the establishment of watershed based prevention strategies. This study was aimed to characterize the physical properties of the SS sampled from Daecheong Reservoir and its upstream rivers during flood events. Extensive field and laboratory experiments were carried out to identify the turbidity-SS relationships, particle size distributions, settling velocity, and mineral compositions of the SS. Results showed that the turbidity-SS relationships are site-specific depending on the locations and flood events in the system. The turbidity measured within the reservoir was much greater than that measured in the upstream rivers for the same SS value. The effective diameters ($D_{50}$) in the rivers were in the range of $13.3{\sim}54.3{\mu}m$, while those in the reservoir were reduced to $2.5{\sim}14.0{\mu}m$ due to a fast settling of large particles in the rivers. The major minerals consisting of the SS were found to be Illite, Muscovite, Albite, and Quartz both in the rivers and reservoir. Their apparent settling velocities at various locations in the reservoir were in the range of 0.06~0.13 m/day. The research outcome provides a fundamental information for the fine suspended particles that cause persistent turbidity in the reservoir, and can be used as basic parameters for modeling study to search watershed based optimal control measures.

A Study on Planning Characteristics and Usability of Community Space of Rented Apartment -Focusing on the rental apartment complex constructed in the 1990's- (임대아파트 커뮤니티 공간의 계획 특성과 이용성 연구 -1990년대 조성된 임대아파트 단지를 중심으로-)

  • Park, Hoon
    • Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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    • v.8 no.5
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    • pp.893-903
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    • 2018
  • Rental housing complex is the complex built up for stable supply of residence for low income class and it offers significant implication to the Korean society in the residential welfare aspect, and as it has been the continuous subject of dispute and interest, such an issue has stirred significant interest on residential environment of low income class. It has made along with the residence history of Korea, but in the aspect of quality of life for low income class, there is a significant difference with generally supplied residence, and it ultimately continues with the disputes with the rights on quality of life for low income class. For this study, a total of six rental housing complexes were implemented with the field survey and it also had the survey on facility utility and physical environment. Use of facilities is influenced by the arrangement plan on physical environment of the complex, and in particular, it is influenced by the relationship of the main entry to the complex and surrounding complexes. In addition, following the level of design and facility plan of community space and it has confirmed the need to accommodate the request of users through securing the integrated function of community facilities.

Comparison of the Quality of Life of the Elderly inpatient with that of the normal elderly people (입원노인과 일반노인의 삶의 질의 비교)

  • 민경진;김정자;차춘근
    • Korean Journal of Health Education and Promotion
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    • v.17 no.2
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    • pp.183-205
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    • 2000
  • This research was designed to compare the health condition and the quality of life of the elderly inpatients with those of the normal elderly people. The subjects of study were 482 elderly inpatients and 304 normal elderly people. The research was conducted in July and August using the instrument WHOQOL. The results of the research are as follows: For the level of health, it was recognized that male was healthier than female, having higher the education, living in the city rather than in the rural, keeping the normal life than being in the hospital. There were little difference in the past medical histories of the elderly inpatients and the normal elderly people. As to the diseases currently under the treatment, there were some difference between the elderly inpatients and the normal elderly people but the tendency was similar in the kinds and the frequencies. As to the recognition for the quality of life between the elderly inpatients and the normal elderly people based on the records reflected on each of the domains of WHOQOL, the normal elderly people more positively recognized in the overall quality of life and the following domains: physical, psychological, level of independence, and spirituality/religion/personal beliefs. The normal elderly people more positively recognized especially in the level of independence domain (mobility, activities of daily living, dependence on medication or treatments, working capacity). In the social relationships domain only the sexual activity was significant and the normal elderly people more positively recognized. The elderly inpatients showed the correlation of over 0.5 in the overall quality of life and the following domains: environment, social relationships, physical, psychological, level of independence. It was over 0.6 in the physical domain and the domains of psychological and level of independence. and the psychological domains of level of independence and social relationships. For the points of overall quality of life, it had no correlation with hospitalization but the health condition, residential district, occupation, and taste exerted a significant effect. As a result of separate analyses of the elderly inpatients and the normal elderly people, the health condition and the age only were the common variable which would exercise a significant effect. Besides, the primary factors which would exercise the quality of life were the occupation and taste for the elderly inpatients, and the residential district and source of income for the normal elderly people. In conclusion, it is first and foremost important to improve the standard of health for the overall quality of life for the elderly people, regardless of hospitalization. Therefore, a plan must be urgently drawn up for revitalization of the health promoting projects for the elderly people and the public health projects for the elderly people, and the investment must be increased for settlement of health problems of the elderly people.

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An Evaluation on the Attitudes and Importance-Satisfaction on Service Quality of University Foodservice among International Students in Busan (부산지역 외국인 유학생의 대학급식 이용실태 및 급식 품질 속성에 대한 중요도-만족도 조사)

  • Hong, Kyung Hee;Lee, Hyun Sook
    • Korean Journal of Community Nutrition
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    • v.24 no.3
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    • pp.208-222
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    • 2019
  • Objectives: This study examined the usage status and the degree of satisfaction of university foodservice (UF) perceived by international students in Busan. Methods: A questionnaire survey was conducted on the utilization of UF, improvement requirements, preference type and recipe, as well as the importance and satisfaction of UF quality attributes as perceived by international students (n=604) at universities in the Busan area between April and June 2017. Results: UF was 'generally satisfied' or 'very satisfied' in about 35.4% of the study population, and 'not very satisfied' or 'not satisfied at all' in approximately 11.5%. Approximately 21.7% said that UF contributed to dietary life 'very much' or 'quite significantly' and 36.4% said 'not very much' or 'not at all'. The largest demand for improvement of UF was 'variety of menu' (52.0%). The most leftover food in UF was kimchi (30.3%) and broth/stew (19.2%), and the major reason for having leftover was 'not to one's taste' (27.8%). After dividing the foodservice quality attributes into 5 factors - food quality and price, sanitation, convenience, physical environment, and service environment - and analyzing the importance and satisfaction of each factor, it was shown that satisfaction was generally lower than the degree of importance. Sanitation factor was high for both importance and satisfaction of UF, while convenience factor was high for the importance but low for satisfaction of UF. Four variables in the food quality and price factor ('food taste', 'freshness of food', 'nutritive value of food', and 'reasonable price') and 3 variables in the convenience factor ('variety of menu', 'prompt food service', and 'display of the meals for the day') had high importance but low satisfaction, showing the need for an improvement on these areas. Conclusions: Based on the study results, it is necessary to improve the food quality, as well as the price and convenience factors, and to provide various menus to increase the satisfaction of UF in international students.

A Store Recommendation Procedure in Ubiquitous Market for User Privacy (U-마켓에서의 사용자 정보보호를 위한 매장 추천방법)

  • Kim, Jae-Kyeong;Chae, Kyung-Hee;Gu, Ja-Chul
    • Asia pacific journal of information systems
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    • v.18 no.3
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    • pp.123-145
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    • 2008
  • Recently, as the information communication technology develops, the discussion regarding the ubiquitous environment is occurring in diverse perspectives. Ubiquitous environment is an environment that could transfer data through networks regardless of the physical space, virtual space, time or location. In order to realize the ubiquitous environment, the Pervasive Sensing technology that enables the recognition of users' data without the border between physical and virtual space is required. In addition, the latest and diversified technologies such as Context-Awareness technology are necessary to construct the context around the user by sharing the data accessed through the Pervasive Sensing technology and linkage technology that is to prevent information loss through the wired, wireless networking and database. Especially, Pervasive Sensing technology is taken as an essential technology that enables user oriented services by recognizing the needs of the users even before the users inquire. There are lots of characteristics of ubiquitous environment through the technologies mentioned above such as ubiquity, abundance of data, mutuality, high information density, individualization and customization. Among them, information density directs the accessible amount and quality of the information and it is stored in bulk with ensured quality through Pervasive Sensing technology. Using this, in the companies, the personalized contents(or information) providing became possible for a target customer. Most of all, there are an increasing number of researches with respect to recommender systems that provide what customers need even when the customers do not explicitly ask something for their needs. Recommender systems are well renowned for its affirmative effect that enlarges the selling opportunities and reduces the searching cost of customers since it finds and provides information according to the customers' traits and preference in advance, in a commerce environment. Recommender systems have proved its usability through several methodologies and experiments conducted upon many different fields from the mid-1990s. Most of the researches related with the recommender systems until now take the products or information of internet or mobile context as its object, but there is not enough research concerned with recommending adequate store to customers in a ubiquitous environment. It is possible to track customers' behaviors in a ubiquitous environment, the same way it is implemented in an online market space even when customers are purchasing in an offline marketplace. Unlike existing internet space, in ubiquitous environment, the interest toward the stores is increasing that provides information according to the traffic line of the customers. In other words, the same product can be purchased in several different stores and the preferred store can be different from the customers by personal preference such as traffic line between stores, location, atmosphere, quality, and price. Krulwich(1997) has developed Lifestyle Finder which recommends a product and a store by using the demographical information and purchasing information generated in the internet commerce. Also, Fano(1998) has created a Shopper's Eye which is an information proving system. The information regarding the closest store from the customers' present location is shown when the customer has sent a to-buy list, Sadeh(2003) developed MyCampus that recommends appropriate information and a store in accordance with the schedule saved in a customers' mobile. Moreover, Keegan and O'Hare(2004) came up with EasiShop that provides the suitable tore information including price, after service, and accessibility after analyzing the to-buy list and the current location of customers. However, Krulwich(1997) does not indicate the characteristics of physical space based on the online commerce context and Keegan and O'Hare(2004) only provides information about store related to a product, while Fano(1998) does not fully consider the relationship between the preference toward the stores and the store itself. The most recent research by Sedah(2003), experimented on campus by suggesting recommender systems that reflect situation and preference information besides the characteristics of the physical space. Yet, there is a potential problem since the researches are based on location and preference information of customers which is connected to the invasion of privacy. The primary beginning point of controversy is an invasion of privacy and individual information in a ubiquitous environment according to researches conducted by Al-Muhtadi(2002), Beresford and Stajano(2003), and Ren(2006). Additionally, individuals want to be left anonymous to protect their own personal information, mentioned in Srivastava(2000). Therefore, in this paper, we suggest a methodology to recommend stores in U-market on the basis of ubiquitous environment not using personal information in order to protect individual information and privacy. The main idea behind our suggested methodology is based on Feature Matrices model (FM model, Shahabi and Banaei-Kashani, 2003) that uses clusters of customers' similar transaction data, which is similar to the Collaborative Filtering. However unlike Collaborative Filtering, this methodology overcomes the problems of personal information and privacy since it is not aware of the customer, exactly who they are, The methodology is compared with single trait model(vector model) such as visitor logs, while looking at the actual improvements of the recommendation when the context information is used. It is not easy to find real U-market data, so we experimented with factual data from a real department store with context information. The recommendation procedure of U-market proposed in this paper is divided into four major phases. First phase is collecting and preprocessing data for analysis of shopping patterns of customers. The traits of shopping patterns are expressed as feature matrices of N dimension. On second phase, the similar shopping patterns are grouped into clusters and the representative pattern of each cluster is derived. The distance between shopping patterns is calculated by Projected Pure Euclidean Distance (Shahabi and Banaei-Kashani, 2003). Third phase finds a representative pattern that is similar to a target customer, and at the same time, the shopping information of the customer is traced and saved dynamically. Fourth, the next store is recommended based on the physical distance between stores of representative patterns and the present location of target customer. In this research, we have evaluated the accuracy of recommendation method based on a factual data derived from a department store. There are technological difficulties of tracking on a real-time basis so we extracted purchasing related information and we added on context information on each transaction. As a result, recommendation based on FM model that applies purchasing and context information is more stable and accurate compared to that of vector model. Additionally, we could find more precise recommendation result as more shopping information is accumulated. Realistically, because of the limitation of ubiquitous environment realization, we were not able to reflect on all different kinds of context but more explicit analysis is expected to be attainable in the future after practical system is embodied.

Ecosystem Health Diagnosis Using Integrative Multiple Eco-metric Model Approaches

  • Kim, Hyun-Mac;Choi, Ji-Woong;An, Kwang-Guk
    • Journal of Ecology and Environment
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    • v.36 no.1
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    • pp.73-83
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    • 2013
  • The object of this study was to evaluate lotic ecosystem health using multiple eco-metric approaches such as water chemistry diagnosis, physical habitat health evaluations, and biological integrity modeling at 100 streams of four major watersheds. For the study, eight chemical water quality parameters such as nutrients (N, P) and organic material were measured and 11-metric models of Qualitative Habitat Evaluation Index (QHEI) and multiple eco-metric health assessment model (MEHA) were applied to the four major watershed. Nutrient analysis of nitrogen (N) and phosphorus (P) in all watersheds indicated a eutrophic state depending on the locations of sampling streams. Physical habitat health, based on the QHEI model, averaged 114 (range: 56 - 194), judging as a "good condition" by the criteria of Plafkin et al. (1989). In addition, primary (H1 - H4), secondary (H5 - H7), and tertiary habitat metric variables (H8 - H11) were analyzed in relation to the physical habitat degradations. The plots of tolerant species ($P_{TS}$) and sensitive species ($P_{SS}$) to water quality showed that the proportions of $P_{TS}$ had positive linear functions with nutrients, and that the $P_{SS}$ had inverse linear relations with the chemical variables. The model of eco-metric health assessment showed that mean MEHA was 20.4, indicating a fair condition. Overall, our data suggest that water chemistry, based on nutrients and organic matter, directly modified the trophic structures in relation to food chain in the aquatic ecosystems, and then these directly influenced the compositions of tolerance/sensitive species, resulting in degradations of overall ecological health.

The Assessment of Survey on the Indoor Air Quality at Schools in Korea (국내 일부학교 건축물의 실내공기질 평가)

  • Sohn Jong-Ryeul;Roh Young-Man;Son Bu-Soon
    • Journal of Environmental Health Sciences
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    • v.32 no.2 s.89
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    • pp.140-148
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    • 2006
  • Recently, indoor air quality (IAQ) in workplace, residential environments and schools has been concerned of people, scientists and related the public, and has recognized the health effects related to indoor air pollution. Therefore, this study was performed to investigate the characteristics of IAQ in 55 kindergartens, elementary school, middle schools, and high schools from June, 2004 to May, 2005 in Korea. We measured indoor air pollutants($PM_{10},\;CO_2$, HCHO, total bacteria colony(TBC), CO, radon, TVOCs, asbestos, and $O_3$), and physical factors(noise, temperature, relative humidity, and illumination) with necessary of management for IAQ in school. We classified into 5 kinds of the school by period since building completion, <1 year, 1-3 years, 3-5 years, and 5-10 years. The concentration of pollutants and the level of physical factors compared with standards and guidelines of IAQ on the Ministry of Environment, the Ministry of Health and Welfare, and the Ministry of Education and Human Resources Development. The major results obtained from this study were as follows. Temperature, relative humidity and illumination among the physical factors did not exceed the standards, but noise exceeded it. Asbestos and $O_3$ did not detect in surveyed classrooms. CO, TBC, TVOCs, and HCHO in kindergartens, TBC in elementary schools, TBC, TVOCs dnd HCHO in middle schools, and HCHO in high schools detected the standards. This study is conducted as a part of efforts to provide a foundational data for further relative researches on management of IAQ of school. Therefore, we suggest that country plan for management of IAQ in school should be established through long-term and continuous investigation for assessment on IAQ in school and health risk assessment for students.

Clothing Sharing for Efficiency Use of the Children's Clothing in a Sharing Economy (공유경제 시대, 유아 및 아동기 어린이의 효율적 의복활용을 위한 의복쉐어링)

  • Lee, Yoon Kyung
    • Journal of the Korean Society of Clothing and Textiles
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    • v.41 no.3
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    • pp.548-555
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    • 2017
  • This study focuses on how clothing can increase in the age of the shared economy and as an alternative to the capitalist economy of the 21st century. This study investigates how infants and children use clothes as they undergo many changes based on physical growth, identifies use and disposal methods for surplus clothing from the perspective of a shared economy and explores plans to foster an environment for the healthy use of clothes. The objectives of this study are as follows. First, identify the need for new clothes based on physical changes in the human body; second, propose an alternative to permanent disposal by making used clothes appropriate for temporary disposal (renting and leasing). In sharing services, the condition and quality of the product were found to be the most important factors. The condition and quality of the product (70.0%) were the most important factors in sharing services. The sharing services for clothes and goods of infants and children could become popular quickly if there was a reliability guarantee offered by such sharing services. In addition, providing trial services and aggressive publicity for sharing services is urgent for the expansion of opportunities for general consumers.

Effects of Violence Experience, Emotional Labor, and Job Stress on Clinical Nurses' Depression (병원간호사의 폭력경험, 감정노동, 직무 스트레스가 우울에 미치는 영향)

  • Noh, Jin Hee;Na, Yeon Kyung
    • Korean Journal of Occupational Health Nursing
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    • v.24 no.3
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    • pp.153-161
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    • 2015
  • Purpose: The purpose of this study was to identify the effects of violence experience, emotional labor and job stress on clinical nurses' depression and to provide suggestions for improving the quality of patient care. Methods: This research involved 257 clinical nurses who were working at an acute care hospital with at least 200 beds in S city and K province. Data were collected from May 23 to June 7 in 2014 and were analyzed using IBM SPSS version 21.0. Results: The results show that 98.1% of subjects had violence experience in the past year and the violence experience included 44.4% physical threat, 37.5% verbal violence and 18.1% physical violence. The average scores were emotional labor 3.57, job stress 3.54 and depression 21.16. There were positive correlations among violence experience, emotional labor, job stress and depression (p<.01). There were also significant co-relationships between depression and violence experience (r=.21, p=.001), between depression and emotional labor (r=.48, p<.001) and between depression and job stress (r=.31, p<.001). Conclusion: The results suggest that it is necessary to set up guidelines for clinical nurses to manage violence, emotional labor and job stress in order to create better working environment and to improve quality of patient care.

Present Condition of Indoor Thermal and Air Environment by Air-conditioning in School Classrooms (학교교실의 냉방시 실내열.공기 환경 실태)

  • Choi, Yoon-Jung;Kim, Hye-Kyeong;Hwang, Jin-A;Lee, Seon-A;Jeong, Youn-Hong
    • Proceeding of Spring/Autumn Annual Conference of KHA
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    • 2006.11a
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    • pp.291-296
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    • 2006
  • The purpose of this study were to make clear the present condition of indoor thermal and air environment by air-conditioning in school classrooms and to analyze the relation of the living conditions with indoor environment. The measurements on physical elements and observations on living conditions were carried out in 6 classrooms of 3 middle or high schools. Measuring elements were indoor temperature, relative humidity, $PM_{10}$ and $CO_2$ concentration. As results, the averages of indoor temperature each classrooms were 24.9${\sim}$26.6 . Most of classrooms were lower than the Maintenance standard(26${\sim}$28 ) of School Health Law. The means of relative humidity were 51.3${\sim}$72%, all classrooms were ranged within the standard(30${\sim}$80%). The means of $PM_{10}$ concentration were 3.5${\sim}$23.1 ${\mu}g/m^3$, all classrooms were kept within the standard(100 ${\mu}g/m^3$). The means of $CO_2$ concentration were 1218.7${\sim}$4705.4 ppm, all classrooms were exceed the standard(1,000ppm). The results of analysis on relations of living conditions with the physical elements are as follow; the air conditioner set of temperature, windows and doors opening elapsed time, the number of students in classrooms and activities of students had certain effect on indoor environment.

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