• Title/Summary/Keyword: Environment condition

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A study on sleep environment in bedroom and segmentation of sleepers in Korea (한국인의 침실환경과 침실 사용자그룹 세분화에 관한 연구)

  • Kim, Bi-Na;Chun, Chung-Yoon
    • Proceeding of Spring/Autumn Annual Conference of KHA
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    • 2008.04a
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    • pp.291-296
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    • 2008
  • This paper reports on the results of a questionnaire survey on actual conditions of sleep environment, sleep problems and sleep patterns in bedroom of house. The objectives of survey are: 1) classifying Korean people into several groups by sleep environment condition, sleep problem and life pattern, 2) describing the characteristics of user groups, and 3) searching needs of support for each user group. Despite of several studies about sleep condition that researched in advance, they weren't considered about user's respective characters. So it seems necessary for more studies about users' needs, and segment users to grasp their each detail needs. Therefore, this study conducted questionnaire survey gathering relevant information to classify user groups and to investigate the current bedroom condition. In the result, 702 respondents were divided into six clusters by extracted eight factors. Four clusters of them had some problems for sleep, so it could be seen that they need environmental solution for their good sleep. As the further objective, it will be connected to develop the good sleep system.

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Foundation of Park Management Plan to Consider Ecological Aspects Based on Environment.Ecology Research and Analysis in Bulamsan Urban Nature Park (불암산도시자연공원의 환경생태 현황 조사.분석을 통한 생태적 측면에서의 공원관리계획 수립)

  • Lee Soo-Dong;Choi Jin-Woo;Lee Kyong-Jae;Han Bong-Ho
    • Korean Journal of Environment and Ecology
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    • v.20 no.2
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    • pp.170-187
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    • 2006
  • The purpose of this study is to provide a basic datd for establishing a basic park management plan for Bulamsan Urban Nature Park. This research surveys very closely about the present condition of the natural ecosystem based on the examination and analysis of the present condition. This research suggests development and management methods for environment-friendly park by understanding damages on the ecosystem due to overuse, as well as park facilities and their effects on the surrounding environment, using quantative analysis. The three steps: researching the present condition research, ecosystem evaluation, and park management plan were taken in order. The present condition research is based on the general condition, natural environment, and natural ecosystem data. In the ecosystem evaluation, wildlife habitats evaluation, landscape evaluation, and biotope type research which is a materialized form of the plant ecosystem were excuted based on the present condition research data. In the park management plan step, 1) classified ecosystem and landscae preservation zone, ecosystem protection zone and ecosystem restoration zone as ecosystem and landscape preservation plan, 2) plannings for ecosystem, fine landscape preservation, damaged area restoration and recovery plan were established in order to suggest environment-friendly plan,

Physiological Relevance of Salt Environment for in vitro recA System

  • Kim, Jong-Il
    • Journal of Microbiology
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    • v.37 no.2
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    • pp.59-65
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    • 1999
  • RecA protein can promote strand assimilation, homologous pairing, and strand exchange. All these reactions require DNA-dependent ATP hydrolysis by recA protein, and the activities of recA protein are affected by the ionic environment. In this experiment, DNA-dependent ATPase activity showed different sensitivity to anionic species. ATP hydrolysis and strand exchange were relatively sensitive to salt in the reactions with NaCl, strongly inhibited at 100 mM NaCl. However, the inhibition by sodium acetate or sodium glutamate was not observed at 50∼100 mM concentration. Addition of sodium glutamate to the standard reaction condition increased the apparent efficiency of ATP hydrolysis during strand exchange. The condition including 50∼100 mM sodium-glutamate might be similar to the physiological condition.

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A study on the Physiological Character of living Space in Traditional Koaean House - Focsed on the rural house in Chonbuk province - (전통주거(傳統住居) 공간의 생리적(生理的) 특성(特性)에 관한 연구 - 전북지방 농촌주택(農村住宅)을 중심으로 -)

  • Kim, Yong-Jip
    • Journal of architectural history
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    • v.8 no.2 s.19
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    • pp.59-72
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    • 1999
  • The purpose of this study is to find the spatial factors, strucure of living and activity in traditional Korean house through the Phiysiological view, Spatial factors of the house are concerned to the interior environment and sanitary condition, The elements of respiratory, nerve, temperature sence. vision, hearing, smelling have good condition and touch, pressure sence, pain, metabolism are poor in the house, Ventilation, Lighting, pleasant condition of interior environment are concerned to the elements that mentioned above and have most important meaning in the relation rate of space as 1st factor. And 2nd factor is for metabolism, housework and rest, 3rd factor ie for temperature sence, privacy and reproduction. The relation rate of factors concering interior environment are high in the upper class house. Anbang has important meaning in the relation of living structure and relation sequence of space is anbang, Konnonbang, kitchen, toilet, water place, auxiliary buildings. The relation rate of activity is high in interior space in winter and exterior space in summer.

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Enhancement of Biocontrol Activity of Serratia plymuthica A21 -4 Toward Phytophthora Blight of Pepper by Amendment of Nutritional Condition

  • Shen, Shun-Shan;Kim, Chang-Guk;Park, Chang-Seuk
    • Proceedings of the Korean Society of Plant Pathology Conference
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    • 2003.10a
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    • pp.96.1-96
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    • 2003
  • Serratia plymuthim A21-4 strongly inhibits the mycelial growth, zoospore formation, and cystospore germination of Phytophthor spp and Pythium species. The bacterial isolate produced antifungal substance and chitinase. The bacteria also enhanced to plant growth remarkably in low nutritional condition. The application of cell suspension of A21-4 to pepper seedlings in greenhouse experiments and soil drenching in farmer's field was proved successfully to control the phythophthora blight of pepper. For the effective control, however, relatively high density of cell number(10$\^$9/cfu/$m\ell$) is required. Density effect was similar in plant growth promoting activity of A21-4. Though this investigation we improved the problem with changes of culture condition of bacteria and some nutritional amendment.

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Sensing Performance Evaluation under Various Environment Condition of Stroke Sensing Cylinder using Hall Sensor (자기센서를 이용한 위치검출 실린더의 환경변화에 따른 성능평가)

  • Kim, Sung-Hyun;Bae, Jong-Il;Lee, Min-Cheol;Lee, Man-Hyung
    • Proceedings of the KIEE Conference
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    • 1997.07b
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    • pp.524-526
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    • 1997
  • We have developed a part of hydraulic stroke sensing cylinder using magnetic sensor that can detect each position under severe construction fields. In this paper, for evaluating the developed cylinder under various environment condition, temperature control systems and two hydraulic systems to be coupled consist of. The results show that the developed cylinder has good performance under the various environment condition.

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A Study on the condition of Indoor environmental safety in kindergarten (유아교육기관의 실내 환경 안전 실태에 관한 연구)

  • Choi, Eun-Jin;Han, Hae-Ryon
    • Proceedings of the Korean Institute of Interior Design Conference
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    • 2008.05a
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    • pp.242-246
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    • 2008
  • This study is to research on the condition of safe environment of kindergartens. This study is to supplement the preceding study which was based only on survey to show the result and analyze the condition and problems of the safety of kindergartens to suggest the basic database of indoor environment that cause accident. First as a theoretical study, we analyze the preceding studies according to the related regulations. And we made checklist based on this and visited and investigated two kindergartens where applied for the case study As the result, we could understand factors that can cause accidents from classroom, corridor, door, stairs, balustrade, toilet, kitchen, front door, and fire exit/shelter. Especially, in case of fire exit/shelter, the whole renewal of kindergarten was necessary which is difficult. But, though it can not be advanced right away, they should try to have facility expansion and repair works gradually. And for more study on this, active cooperation from kindergartens are in need.

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Feature of the Change of the Arsenic Ionic State and Prediction of Toxicity in Aqueous Environment depending on Temperature Condition (온도 조건에 따른 비소 이온의 수중 상태 변화 특성 및 독성 예측)

  • Won, Yu-Ra;Kim, Dong-Su
    • Journal of Korean Society on Water Environment
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    • v.29 no.2
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    • pp.176-183
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    • 2013
  • The variation of the stable region of arsenic compounds in aqueous environment with temperature has been investigated by constructing the Pourbaix diagram of arsenic at different temperatures. The standard potential corresponding to the boundary between arsenic compounds with different charge valence was estimated to be decreased with temperature, which means the stability of arsenic compound with +5 charge valence increases. The distribution diagram of the most highly oxidized arsenic compound showed that arsenic acid is formed at higher pH and arsenate is generated at lower pH as temperature rises. The aquatic toxicity due to arsenic compounds was considered to be decreased with temperature in the neutral pH condition based on the $LD_T$ value defined in this study.

Effect of Coagulation Condition on Coagulation/Ultrafiltration Membrane Process (응집·한외여과 공정에서 응집조건 결정에 관한 연구)

  • Moon, Seong-Yong;Lee, Sang-Hyup;Kim, Seung-Hyun;Moon, Byung-Hyun
    • Journal of Korean Society on Water Environment
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    • v.21 no.4
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    • pp.379-384
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    • 2005
  • In this research, coagulation was employed as the pretreatment for membrane process. The effective coagulation conditions were decided after the discussion of different coagulant doses and mixing conditions, etc. Raw water was taken from Nakdong River. The best operation occurred when G value was $230s^{-1}$ and the slow mixing lasted around 5 minutes at G value was $23s^{-1}$. To investigate the optimum coagulant dosage, the optimum organics removal was target as organic removal reduces membrane fouling effectively than particle removal. This result indicated that organics are more important causes than turbidity for membrane fouling. However, turbidity becomes an important factor after certain amount of organic matters is removed.