• 한국도로학회논문집
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• 제14권3호
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• pp.173-182
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• 2012

휴게소 진 출입부는 설계속도 등이 급변하는 구간으로 교통안전 취약구간이며 특히, 휴게소 진입부는 감속과 주차공간 검색 두 가지 작업이 동시에 수행되므로 이용차량의 안전성을 확보할 수 있는 설계기준이 필요하다. 국내의 경우 영업소나 나들목, 분기점 같은 출입시설에 대한 기하구조 기준은 수립되어 있는 반면, 도로의 부속시설인 휴게소에 대한 상세한 기하구조 기준은 없는 실정이다. 이에 본 연구에서는 일반형 휴게소 135개소를 대상으로 한 현장조사 및 사고조사 자료를 활용하여 휴게소진 출입부 기하구조에 대한 문제점을 도출하였다. 휴게소 진 출입부의 설계구간을 분류하고 각 구간에 대한 설계요소를 도출한 후, 휴게소 진 출입부를 대상으로 속도조사 및 차량주행행태 조사를 수행하고 분석을 통해 설계요소별 최소 기준을 도출하였다. 진입 연결로의 시/종점 속도에 따라 감속거리 산정식을 이용하여 진입 연결로의 최소길이는 40m를 제안하였고, 주행행태를 기반으로 선형 안전성 평가를 통해 접속 설치각은 12~$17^{\circ}$를 제안하였다. 개발된 휴게소 진입부 설계기준은 신설되는 휴게소 뿐만 아니라 기존 휴게소에 대해 현실적으로 적용 가능한 개선방안을 제시할 수 있을 것으로 판단된다.

• 한국실내디자인학회논문집
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• 제20호
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• pp.56-61
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• 1999

The purpose this study was to examine the actual condition and trends in changing the seating style in the house, focusing on the behavioral posture. The data was collected through the self-entry questionnaire designed for this study and the sample of 400 in total, 200 cases from Korea and 200 cases from Japav. The major findings were as the following : the seating style of Korean and japanese female university students were the floor-seating trends in the present conditiov. But they generally preferred the chair seating in the future. In the present seating style, the chair seating style has included bath, study, dinner, sleep, make-up, rest and family communication in that order by Korean Female university students ; the chair seating style has included sleep, study, dinner, make-up, bath, rest and family communication in that order by japanese. In the future seating style, the chair seating style has included study, make-up, dinner, sleep, bath, family communication and rest in that order by Korean ; the chair seating style sleep, study·make-up, dinner, family communication, rest and bath in that order by Japanese.

• 대한치과의사협회지
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• 제11권4호
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• pp.263-266
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• 1973

The measuring tests on the rest position capacity and the tongue volume were conducted on the one hundred normal dental college students and staffs of Seoul National University in order to study the relationships between the est position Capacity and tongue volume. The results were as follows : 1) The correlation between the rest position capacity and tongue volume was hardly recognized. 2) The correlation between tongue volume and the weight was recognized. 3) Physiologic reflex was coused by the water injected in the mouth in the rest position. 4) Each correlation of the height and cheek thickness to the tongue volume was not recognized.

• 한국항공운항학회지
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• 제27권3호
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• pp.106-111
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• 2019

Pilot has been fighting to get over fatigue during flight and thought it as a hinderance for safe flight. The fatigue related problem has been the biggest obstacle for aviation safety so far. Even though pilots and airlines try their best to overcome fatigue during flight, they couldn't overcome this problem. So the airliners let the pilot sleep during flight if pilots are too tired with the report. It is controlled rest used and managed by several European airliners. So this study tries to get Korean airline pilots' fatigue information and figure out the cause and reduce it.

• 교육시설 논문지
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• 제26권1호
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• pp.17-23
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• 2019

Nowadays, the concept of outdoor campus is different from the past. U-Campus with a well-developed high-speed computer network is no longer a constraint on the campus interior and exterior spaces. From this point of view, today's large-scale university outdoor spaces need to be changed from a simple green space. The university campus outdoor spaces need to be changed into a new concept space. This study analyzed the changes in academic activities and preferences of college students who are users of university campus outdoor spaces and it is aimed at space planning that reflects the preference. The university campus should be remodified through changes in students' behaviors. Participants in this study were four different departments students (Social science, Physical education, Natural science and Engineering). The preference results of 17 items were analyzed. As a result of this preference analysis, we found that there is a difference in preference among students belonging to four different departments students. In conclusion, this study will propose that the preferences of each college should be considered in planning the outdoor rest spaces of university campus.

• BMB Reports
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• 제55권6호
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• pp.287-292
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• 2022

The acute response to hypoxia is mainly driven by hypoxia-inducible factors, but their effects gradually subside with time. Hypoxia-specific histone modifications may be important for the stable maintenance of long-term adaptation to hypoxia. However, little is known about the molecular mechanisms underlying the dynamic alterations of histones under hypoxic conditions. We found that the phosphorylation of histone H3 at Ser-10 (H3S10) was noticeably attenuated after hypoxic challenge, which was mediated by the inhibition of aurora kinase B (AURKB). To understand the role of AURKB in epigenetic regulation, DNA microarray and transcription factor binding site analyses combined with proteomics analysis were performed. Under normoxia, phosphorylated AURKB, in concert with the repressor element-1 silencing transcription factor (REST), phosphorylates H3S10, which allows the AURKB-REST complex to access the MDM2 proto-oncogene. REST then acts as a transcriptional repressor of MDM2 and downregulates its expression. Under hypoxia, AURKB is dephosphorylated and the AURKB-REST complex fails to access MDM2, leading to the upregulation of its expression. In this study, we present a case of hypoxia-specific epigenetic regulation of the oxygen-sensitive AURKB signaling pathway. To better understand the cellular adaptation to hypoxia, it is worthwhile to further investigate the epigenetic regulation of genes under hypoxic conditions.

• 한국콘텐츠학회논문지
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• 제22권6호
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• pp.386-399
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• 2022

본 연구는 도시 숲 산림치유프로그램 교육 및 활동이 정서적 쉼(치유회복환경지각, 주의회복, 여가생활만족)에 어떠한 영향을 미치는지를 확인하려는 목적이 있다. 이를 위해 38명을 대상으로 실험군(산림치유프로그램교육 및 실습), 대조군(프로그램 미참여)으로 나누어 연구를 진행하였다. 연구결과, 실험군의 경우는 프로그램 사후에 정서적 쉼 요소인 치유회복환경지각, 주의회복, 여가활동만족 모두에서 통계적으로 유의하게 향상되었고, 대조군의 경우는 사후에 정서적 쉼에 대한 변화가 없었다. 또한 참여자 그룹 간 정서적 쉼 차이에 대해서는 사전과 사후에 모두 그룹 간 차이가 있었는데, 사전 차이에 비해 사후 정서적 쉼 차이가 훨씬 더 크게 나타났다. 결론적으로 산림치유에 대한 교육을 정기적으로 받고 실제 산림치유활동을 한 사람들은 그렇지 않은 사람들에 비해 정서적 쉼을 더 높게 경험하는 것을 알 수 있다. 이는 단순히 산림활동에 대한 긍정적 인식을 가지고 임의로 산책 활동하는 것보다 적절한 프로그램을 통해 지속적인 동기부여 및 정기적인 실천이 치유회복환경에 대한 인식을 높이고 주의회복을 증진시키며, 여가생활에 긍정적 효과를 줄 수 있음을 시사한다.

• The Korean Journal of Physiology
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• 제30권1호
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• pp.43-51
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• 1996

This study was aimed to elucidate the changes in heart rate variability during treadmill exercise at various speeds and grades by spectral analysis. Thirty-three untrained male college students aged $20{\sim}26\;yr $were employed to exercise on a treadmill using 4 speeds (4.02, 5.47, 6.76 and 8.05 km/h) and 6 grades (0, 4, 8, 12, 16 and 20%). A fixed speed was selected for each session with the grade increased every 3 min. The electrocardiogram, respiration and the stepping activity were continuously recorded through an A/D converter system on the computer disk. Power spectra of heart rate variability (RRV) were obtained by use of a fast Fourier transform algorithm. The frequency domain was divided into 3 bands: $VLF\;(0{\sim}0.04\;Hz),\;LF\;(0.04 {\sim}0.15\;Hz)\;and\;HF\;(0.15{\sim}1.00\;Hz).$ Heart rate was $74.4{\pm}2.1\;beats/min$ at rest and showed a steady increase during treadmill exercise with increasing speed and grade up to $196.7{\pm}5.0\;beats/min.$ Total power of HRV was $35.0{\pm}6.7\;(beats/min)^{2}$ at rest and progressively decreased during exercise down to $1.9{\pm}0.3\;(beats/min)^{2}.$ The %VLF power of HRV was $34.5{\pm}3.7\; %$ at rest and showed no significant change during exercise except for a decrease observed at the highest intensity of exercise. The %LF power was $44.1{\pm}3.0\;%$ at rest and showed a progressive decrease down to $4.5{\pm}1.0\;%$ during those stages of exercise where heart rate was over 135 beats/min. The %HF power was $21.4{\pm}2.9\;%$ at rest and showed a progressive increase up to $87.1{\pm}6.7\;%$ during higher intensity exercise where heart rate was over 165 beats/min. Peak frequency of HF band was $0.200{\pm}0.018\;Hz$ at rest and was shifted to higher frequencies up to $0.909{\pm}0.048\;Hz$ at heart rates greater than 135 beats/min. Respiratory frequency was $18.0{\pm}1.5$ breaths/min at rest and significantly increased during exercise up to $53.0{\pm}3.7$ breaths/min. Stride frequency during treadmill exercise showed an increasing tendency with increasing speed from $55.6{\pm}0.9$ steps/min at 4.02 km/h to $81.2{\pm}0.6$ at 8.05 km/h. It was concluded that total power of HRV decreased progressively with increasing exercise intensity due to the withdrawal of parasympathetic activity. At higher exercise intensity, % LF power decreased and %HF power increased with its peak frequency shifted to higher values in a progressive mode with increasing speed and grade, reflecting a readjustment in the cardiovascular system and the increased respiration and its rate, respectively.

• 한국의류학회지
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• 제17권1호
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• pp.19-35
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• 1993

This study was designed to devise work wear for plastic house worker. It was carried out (1) research on the clothing actual condition through interviewings with plastic house worker and observations, (2) thermal manikin test to measure thermal resistance of experimental clothes and (3) clothing comparing test in the laboratory and in the plastic house. In the laboratory experiment, it was choosen general type (A) and new devised types (B, C) made of microporous fabric for experimental clothes. Experimental clothes were made of 6 combinations including 3 type work wears (A, B, C) and 2 type underwears (1, 2). In the plastic house experiment, it was choosen general types of A (without rest place) and B (with rest place), and devised type C (with rest place), which was appeared good effect in the laboratory experiment. The results were as followings. 1. Work environment of the plastic house in summer and winter was very different from the outer environment. Work motion in the plastic house was burden to the plastic house workers. 2. Plastic house workers had on the general type's work wear. 3. As a result of thermal manikin test, thermal resistance was appeared B1>B2>C2>C1>A1>A2 in orders. 4. In the laboratory experiment, experimental clothes A was appeared smaller burden than B, C. Effect of mesh underwear was not appeared in this study condition. In subjective sensation, experimental clothes C was lower vote than A. Therefore experimental clothes C was superior to A in subjective wearing sensation. 5. In the plastic house experiment, the experimental conditions with rest place were appeared smaller burden than without rest place. General type B was appeared more positive physiological reactions than devised type C but significances between two types was not appeared.

• 한국보육지원학회지
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• 제9권5호
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• pp.335-355
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• 2013

본 연구는 아동권리 존중 측면에서 어린이집에서의 휴식 및 낮잠에 대한 유아들의 인식과 요구는 무엇인지 알아보는 것이 목적이다. 연구대상은 서울시 국공립 B어린이집 원아 만4세 20명, 만5세 20명으로 총40명이다. 연구방법은 면담조사와 프로젝트활동 중에서 참여관찰로 이루어졌으며 이 과정에서 수집한 관찰기록, 녹음자료, 동영상자료의 전사본을 내용분석 하였다. 연구결과로 첫째, 유아가 인식하는 휴식의 의미는 가족과 함께 하는 시간, 재미있는 놀이하는 시간, 힘들고 화날 때 필요한 시간, 맛있는 음식을 먹는 시간으로 나타났으며 둘째, 어린이집에서의 낮잠에 대해 유아들은 자기 싫은데도 자야하는 시간, 조용한 음악 듣는 시간, 자고나면 기분이 좋아지는 시간으로 인식하였으며 셋째, 어린이집에서의 휴식 및 낮잠에 대해 유아들은 친구들이 귀가 후 종일반에 모였을 때 쉬고 싶어 하였으며, 교실 외 별도의 공간을 필요로 하고, 휴식할 때 친숙한 성인의 보호를 요구했다. 이 결과를 통해 유아들의 휴식 및 낮잠을 즐길 수 있는 권리를 존중하는 측면에서 향후 연구방향을 제안하였다.