대학생의 수면양상과 주간졸음증에 영향을 미치는 요인

이혜련(Hyeryeon Yi),신미경(Mee-Kyung Shin),원종순(Jongsoon Won) 기본간호학회 2012 기본간호학회지 Vol.19 No.4

Purpose: The purpose of this study was to investigate sleep patterns and predictors of excessive daytime sleepiness (EDS) in university students. Methods: Participants were 120 university students who were attending two universities in S-city and C-city. Data were collected from May 20 to June 15, 2012 using self-report questionnaires which included Johns’Epworth Sleepiness Scale, Yi’ Sleep Quality Scale, and Beck Depression Inventory. Data were digitalized and analyzed using frequency, percentages, means and standard deviations, Wilcoxon rank sum test, Chi-square test, Fisher’ exact test, and multiple logistic regression with SAS 9.0. Results: Mean total sleep time was 6.6 hours on weekdays, 8.1 hours on weekends. Mean sleep latency was 19.1 minutes and the score for mean sleep quality was 22.6. Prevalence of EDS was 12.5%. Depression was significantly different between EDS and Non-EDS students (t=2.17, p=.030). Multiple logistic regression showed that the only factor associated with EDS was depression (adjusted odds ratio of depression=5.33, 95% Confidence Interval=1.49-19.04). Conclusion: Results of this study indicate that university students experience short sleep time, low sleep quality, and common EDS with depression, suggesting that students with complaints of EDS should be completely assessed for depression as well as sleep problems.

퇴행성관절염 여성노인의 수중운동이 통증 감소와 우울에 미치는 영향

이경옥,한혜원,이영숙,임혜옥 한국유산소운동과학회 2002 대한스포츠융합학회지 (jcses) Vol.6 No.1

The purpose of this study was to investigate the effects of 8weeks' water exercise on female elderly degenerative arthritis's pain and depression The subjects of this study were 40 female degenerative arthritis whose age are over 60. All subjects participated in water exercise program 2times a week, and for 60 minutes each. The water exercise program consists of walking, jogging and jumping in shallow and deep water. Before and after 8 weeks' water exercise program, pain(Visual Analogue Scale) and depression(Geriatric Depression Scale) w m measured. The statistical methods employed in this study were Friedman's ANOVA by ranks. The results of this study were as follows. 1. Before and after 8 weeks water exercise program, there is significant differences in pain (p<.01) 2. Between pre test of first water exercise program and pre test of last water exercise program, there is significant differences in pain.(p<.05) 3. Between post test of first water exercise program and post test of last water exercise program, there is no significant differences in pain. 4. Before and after 8 weeks' water exercise program, there is no significant differences in depression. In conclusion, the following points were drawn. Because water exercise is low or no impact exercise, water exercise reduce the pain of articulation loaded by exercise on the ground. Therefore water exercise can be regarded as an efficient and safe exercise for the elderly and degenerative arthritis.

5인 미만 사업장의 산업안전 규제 순응 실태

이관형,이경용,손두익,서남규,서광국,오지영 한국안전학회 2003 한국안전학회지 Vol.18 No.4

This study is planned to investigate the compliance of small sized enterprises of under 5 employees directed by Industrial Safety and Health Act. Occupational safety regulation can be required for employer and employee to comply because that all members of workplace should be involved to protect worker's health. When all members of workplace comply with safety regulation, effectiveness of regulation will be realized as expectation. The study subject is composed of three groups as 501 employers, 501 employees of small sized enterprises of under 5 employees and 107 safety inspectors sampled by stratified random sampling for comparison. Data for analysis is collected from each sample using interview with structured questionnaires. Compliance is measured by 5 point scale composed by 8 sub items such as general perception, understanding, clearness, necessity, relevancy, implementation, penalty, and general compliance of the regulation. Among sub items of employer's compliance, the level of perception of regulation, necessity of regulation, relevancy of penalty are differentiated among three groups. The level of all 8 items of employee's compliance also differentiated among three groups. These results show that strategies for ensuring the same level of compliance among three groups will be needed through education, training and evaluation of regulation and feedback.

조깅시 착지 유형과 시간에 따른 수직 충격 분석

이경옥,김미예 한국유산소운동과학회 2003 한국유산소운동과학회지 Vol.7 No.1

The purpose of this study was to evaluate how impact force changed according to both time and striking patterns while jogging. Subjects for this study were four university students in their early twenties. The women were normal and healthy, without any chronic injuries or foot problems. Independent variables for this study were jogging time and striking pattern. Jogging time was divided into six stages over the duration of one hour. Striking patterns were divided into two types: heel-strike, and toe-strike. Dependent variables were impact force, loading rate of impact force, number of impact peaks, interval time between first heel (or toe) strike to first passive peak. This study utilized the Kistler type 9281B to measure dependent variables. Toe-strikers possessed lower impact force and fewer impact peaks than heel-strikers. In this aspect, jogging with a toe-strike pattern is more effective in reducing impact force, which can cause pain and injuries. For both groups, interval time between first heel (toe)-strike and first passive peak decreased progressively throughout the duration of the test. These results demonstrated not only a negative correlation between test time and interval time, but also alluded to the effects of fatigue as well. In the case of toe-strikers, impact force did not appear until after thirty minutes. As a result, people who possess a toe-striking jogging pattern can jog for less than thirty minutes in order to minimize the detrimental effects of impact force on the body. After thirty minutes toe-strikers can reduce their exercise intensity level in order to reduce the effects of impact force. Once the effects of fatigue are eliminated at a lower intensity level, toe-strikers can increase their intensity levels back to n o d . Heel-strikers displayed impact force from the beginning of the test duration until the end. Furthermore impact force increased steadily with time. Therefore, it is especially important for heel-strikers to have adequately cushioned shoes, socks, and jogging surface.

운동의 특성과 식습관이 월경주기, 골밀도, 체성분에 미치는 영향

이경옥,이영숙 한국유산소운동과학회 2002 대한스포츠융합학회지 (jcses) Vol.6 No.1

The purpose of this study was to discover the effects of different sports training and dietary habits on the menstrual cycle, body composition, and bone mineral density of elite Korean female athletes. Independent variables were the sport each athlete trained in, as well as their dietary habits. Dependent variables were the menstrual cycle, body composition, and bone mineral density. Dual Energy X-Ray Absorbtiomtry (DEXA: XR-26, Norland USA) was used to measure bone mineral density. Body composition was measured via the eight point high frequency bio-impdence method, utilizing the In-Body 2.0 (Biospace corporation, Korea). The test group consisted of athletes from five different disciplines: weight-lifting, wu shu, synchonized swimming, gymnastics, and judo. The total number of test subjects were 26. The dietary habits of each participant was analyzed. Three catagones were created for irregular eating habits. There were: bingeing, fasting, and under-eating. Irregular menstrual history was also ascertained through a questionnaire. Neither the type of sport, nor dietary habits were directly linked to the menstrual cycle of the test subjects. While dietary habits had a mild effect on body composition, the type of exercise had a high correlation to muscle mass. BMD was effected by both diet and the type of exercise. Although diet was not a major factor in determining BMD, the type of exercise, especially the load and duration of these exercises had a pronounced effect. Futhemore, there was a strong relationship between BMD and body composition. Lastly, the menstrual cycle was shown to have some affects on BMD as well.

Si(lmn) 표면 반전층의 전자적 부띠에너지에 대한 에너지띠구조 효과

이경수 부산대학교 기초과학연구소 1994 부산대학교 기초과학연구소 연구논문집 Vol.14 No.-

임의의 표면 배향을 갖는 Si 표면 반전층 내 전자들의 유효질량과 부띠(subband)에너지를 고찰하였다. 본 논문에서는 <110>축 주위로 (110)면에서 (111)면 쪽으로 임의의 각도 θ만큼 회전하여 얻는 표면배향을 가지는 Si(lmn) 표면 공간전하층의 역유효질양 텐서 α를 θ의 함수로 얻은 다음, 하아트리 근사 변분파동함수를 바탕으로 한 다체섭동 계산방법으로 전기적 부띠 에너지를 구하였다. 표면배향에 따른 부띠구조를 조사함으로써 에너지띠 구조의 영향을 알아보았다. 교환-상관 에너지 범함수를 단일입자 슈뢰딩거 방정식에 도입함으로써 좀더 개선된 바탕을 써서 전자-전자 상호작용 효과를 고찰하였다. Effective masses and subband energies are examined for the electrons in silicon surface inversion layers with various surface orientations. In this paper expressions of the inverse effective mass tensors αare derived for the Si(lmn) space charge layers with surface orientations obtained by rotating from (110) to (111) by θ around <111> and the electric subband energies are evaluated within a many body perturbation method based on the Hartree variational wavefunctions. By examining the subband structures for various surface orientations the band-structure effects are investigated. The effects of the electron-electron are included using a more improved set of basis-functions, which are obtained by employing an exchange-correlation functional in the single-particle Schroedinger equation.

병원 간호사들의 이직 결정 과정

이명선,김원옥,김덕희,고문희,이경숙,김증임 성인간호학회 2003 성인간호학회지 Vol.15 No.4

Purpose: The purpose of the study was to explore how hospital nurses decide to quit working as professional nurses using the grounded theory method. Method: The data was collected by individual in-depth interviews with 12 hospital nurses who recently resigned from work and it was analyzed using 'constant comparative analysis.' Result: The core category that emerged was "in search of new balance with self, work, and family". Three stages were identified: 1) "unconditionally accepting the working situation of itself," 2) "weighing advantages and disadvantages of working as a hospital nurse", and 3) "redesigning a future". Each stage contains three major strategies. The major strategies of the first stage are "maintaining a learning attitude", "enduring physical burnout," and "enduring unfair interpersonal relationships". The second stage contains "identifying advantages of working", "identifying disadvan- tages of working, and "comparing the advantages with the disadvantages". Lastly, the third stage includes "reassessing the aim of life", "beginning to construct an alternative life", and "deciding to quit working at a certain point". Conclusion: The results of the study will help nursing administrators in designing and implementing an effective turnover prevention program for nurses by understanding more deeply the process of turnover phenomenon among hospital nurses.

분광광도법을 사용한 수종 역충전재의 근단부 폐쇄효과에 관한 연구

이진규,박상진,최경규,최기운 大韓齒科保存學會 2003 Restorative Dentistry & Endodontics Vol.28 No.6

The purpose of this study is to evaluate the sealing effect of several root end filling materials using spectrophotometric analysis. 180 single root teeth with one canal were instrumented and canal filled. Root resected and root end preparation was made. Teeth were randomly classified to 5 experimental group(MTA, EBA, IRM, TCP, ZOE) and 1 control group according to root end filling material MTA group used PRO ROOT MTA, EBA group used Super EBA. TCP group used NEW APATITE LINER TYPE II main component of which is phosphate (TCP). According to manufacture's instruction experimental material was mixed and retrfilled. After 2% methylene blue solution penetration absorbance for each test sample was measured with spectrophotometer (JASCO UV 530, Japan). The mean absorbance of control and experimental group was as follows; MTA: 0.092, IRM: 0.226, Super EBA: 0.255, ZOE: 0.374, Control: 0.425, TCP: 0.501 and the result analyzed by Turkey test at P=0.05 level. Conclusions of this study are as follows; 1. The absorbance increase in following sequence MTA, IRM, Super EBA, ZOE, Control. TCP. 2. MTA showed the least leakage but was not significant with IRM or Super EBA and was significant with control or TCP(p<0.05). 3. TCP had the most leakage and was not significant with control group.

Kinematic Evaluation of Gait Variables in Developmental Studies

이경옥,김미애 이화여자대학교 동작과학연구소 2004 이화체육논집 Vol.7 No.-

본 연구의 목적은 유아 보행 발달 과정과 변화를 통한 발달 전이를 설명하기 위해 사용되는 몇가지 운동학적 변인들을 중심으로 각각의 변인들이 유아 보행의 발달 과정과 변화, 그리고 전이를 어떻게 설명하는지를 평가하는 것이다. 본 연구를 위한 실험은 부천 재활 공학 센터 보행 실험실에 설치된 Oxford Metrics 사의 Vicon 370 시스템(Oxford England)을 사용하였다. 이시스템의 자동 추적 방식은 신체 표시(mark)의 위치를 토대로 신체 내부에 가상 좌표계를 계산해 내고, 이를 기준으로 관절의 움직임을 측정하는 카단 앵글(cardan angle)방법을 채용하고있다.대상은 보행이 관성되는 시기라고 알려져 있는 1세~5세까지의 아동 총 24명이다. 시간 및 거리 보행 인자(분속수:steps/min, 보행장 : step length, 보행속도: speed:m/sec, 단하지 지지기 시간: single supprot:%), 보행 주기 동안의 전체 평균 각도, 보행 구간별 평균각, 보행 구간을 구분하기 위한 순간(event)에서의 각도, 최대값, 동적운동법위(dycamic range of motion),연령에 따른 각도, 연령에 따른 각속도를 변인으로 설정하였다. 보행인자를 통해서 보폭 , 보행 속도, 양하지 지지기가 증가하는 이유 즉, 어느 하지분절이, 어느 방향의 운동이 기여하여 그러한 결과가 나온 것인지에 대한 설명은 할 수 없다. 보행 주기 동안 하지 관절별, 운동면별, 구간별 평균값, 시점에서의 평균값 사이에는 차이가 있다. 최고 평균값과 최대 동적 범위의 연령별, 하지 관절별, 운동면별, 구간에 대한 정보를 통해 유아 보행시 하지 분절의 발달 순서와 분절간 보상을 알수 있다. 연령별 각도 그래프를 통해 연령에 따라 각 관절의 변화를 알 수 있고. 관절별 각도 그래프를 통해 관절 간, 내협웅을 알수 있다. 그러나 움직임이란 변화율이 이므로 각도 곡선 보다는 각속도 곡선이 설명력이 높다고 할 수 있다. 이렇듯 유아 보행 발달 변인들은 각각의 변인에 따라 설명할 수 있는 범위와 내용이 다르다. 그러므로 변인을 설정할 때 자신의 연구 문제를 잘 설명할 수 있는 변인으로 선택해야 한다.

퇴행성관절염 환자의 보행시 지면 반력 분석

이경옥,김미예 한국특수체육학회 2003 한국특수체육학회지 Vol.11 No.3

The purpose of this study is to analyze ground reaction force of walking for elderly women with degenerative osteoarthritis. The force platform (Kistler Type 9281CA, sampling frequency 1000HZ) was used to measure ground reaction force. Dependent variables for this study included both vertical and anterior/posterior ground reaction force components of walking. The paired t test was used to analyze the variables of the gait cycle for both the left and right side. The passive force peaks for elderly women with degenerative osteoarthritis had a greater magnitude and were greater in number than those of the control group. For the elderly group, active force peaks had a higher magnitude and were more frequent as well. The pattern of active force for the control group was symmetrical, while the pattern for the elderly group was asymmetrical. Compared to the control group, the stance time for elderly women was less. The total integral for the elderly group was less than that of the normal group. Braking time was less for elderly women in comparison to the control group. There were differences in the right and left leg for total impulse, braking time, and the impulse of braking force as well.