• 동의신경정신과학회지
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• 제21권1호
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• pp.89-108
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• 2010

Objectives: This study was to investigate the relation of Pittsburgh Sleep Quality Index(PSQI) and Diagnos system of oriental medicine(DSOM) in the Insomnia Patients. Methods: For this study, we carried out PSQI and DSOM of 92 patients with insomnia who have come to Kijang public health center and Donguei oriental hospital of Donguei university from November 2008 to October 2009. We verified the association of PSQI and DSOM using crosstabulation analysis, independent sample T-test, one-way ANOVA and correlation analysis. Results: 1. Blood-deficiency(血虛) is the most frequent pathogenic factor and frequency of nightmare has positive correlation with that factor including heart(心) in total insomnia patients. 2. Female patients have a higher percentage of chronic insomnia than male patients. 3. As patients aged, maintaining sleep gets harder, sleep time is lessening, taking hypnotics is increasing and quality of sleep gets worse. 4. There is high frequency of chronic insomnia in 40~50 years and over 60 years old. Also, the people who are over 60 years of age tend to sleepless and urinated frequently during the middle of the night. The people with the age of 20~30 years tend to take less sleeping pills and frequency of sleeping during daytime is higher than the other age groups but the quality of sleep is quite good. 5. The patient with over 6 months of chronic insomnia tend to be older in age than the patient with less than 6 months. And the patient with chronic sleeping disorder has frequent pain and the quality of sleep is very poor. 6. The patient who took hypnotics tend to be older than hypnotics non-user and frequency of urination was relatively high. 7. The patient who visited oriental medical hospital were tend to be older and get difficult in maintaining sleep. And frequency of taking hypnotics and urinating during night were tend to be higher and the quality of sleep was poor compared with the patient who visited public health center. Conclusions: This study provides insights into the complicated relations of the associated symptom of insomnia with Diagnos system of oriental medicine. And especially this study showed apparent correlation between nightmare in insomnia patients and pathogenic factor of blood-deficiency and heart. Specific correlations and characteristics in this study could be connect develop of new questionaire of insomnia.

• 한국자동차공학회논문집
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• 제9권4호
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• pp.148-156
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• 2001

Brake judder, one of low Sequency vibrations in brake system is determined by the excitation of Brake Torque Variation (BTV). The largest contributor to BTV is disc thickness variation. In this study, the static loads of brake torque at Suspension Mounting Points (SW) are obtained by the quasi-static analysis using DADS. The dynamic loads with frequency of BTV at SW are derived from correlation between forced vibration analysis with static loads and brake test results. And the accelerations at steering wheel were analyzed by forced vibration analysis with dynamic loads using commercial finite element program MSC/NASTRAN so that vibration characteristics of vehicle due to brake judder were investigated. Reliability of analysis results was verified through comparing the brake test results. Also, a parametric study with natural frequencies of frame, such as the 1st torsional mode and 1st bending mode, was conducted to reduce vibration amplitudes. As a result we could detect frame natural frequency conditions to improve vibration characteristics and obtained the frame model to reduce vibration amplitude.

• 한국응용과학기술학회지
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• 제38권4호
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• pp.974-985
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• 2021

본 연구는 헤어서비스전문가의 블랙컨슈머 행동지각이 정서적 소진과 자아탄력성에 미치는 영향에 대하여 연구하는 것을 목적으로 한다. 서울, 경기, 전남지역 헤어미용전문가를 대상으로 318부의 설문지가 최종 분석 자료로 사용되었으며 SPSS 26.0 통계 프로그램을 사용하여 분석 되었다. 연구결과는 첫째, 블랙컨슈머 행동지각이 정서적 소진에 정적(+)상관관계를 보였고, 블랙컨슈머 행동지각이 자아탄력성에 부적(-)상관관계를 보였다. 정서적 소진과 자아탄력성은 서로 부적(-)상관관계를 보였다. 둘째, 블랙컨슈머 요인 중 과도성이 정서적 소진에 영향을 미치고 있음이 확인되었다. 셋째, 블랙컨슈머 요인 중 과도성, 상습성이 자아탄력성에 영향을 미치고 있음이 확인되었다. 넷째, 정서적 소진은 자아탄력성에 영향을 미치고 있음이 확인되었다.

• 산경연구논집
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• 제6권4호
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• pp.17-22
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• 2015

Purpose - This study investigated the demographic characteristics of retirees who sought not to be reemployed or join an organization but, instead, to be self-employed. This study verified self-employment by regional and/or educational features to determine the self-employment factors and the policies required. Research design, data, and methodology - Models and hypotheses were used to verify the conversion into self-employment depending on retirees' demographic characteristics. This study investigated regions according to precedent studies and used SPSS 18.0 as follows. First, frequency was used to investigate the general characteristics. Second, a factor correlation analysis was done. Results - Hypothesis 1, which stated that, "retirees with low educational background often start a self-employed business," was significant. Hypothesis 2, which stated that, "retirees in metropolitan areas frequently start a self-employed business," was significant. Hypothesis 3, which stated that, "retirees in a megalopolis frequently start a self-employed business," was significant. Conclusions - A preliminary startup education was needed to lessen the losses. Retirees should have preliminary knowledge of actual self-employment conditions to be given a startup education.

• 대한암한의학회지
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• 제16권1호
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• pp.15-31
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• 2011

Objective : The study aims to investigate the effect of moxibustion treatments on autonomic nervous system function of cancer patients through the evaluation of heart rate variability (HRV) biofeedback testing. Materials and Methods : Six cancer patients from inpatient care unit of Dunsan Oriental Hospital, Daejeon University were given three moxibustion treatment sessions every other day over one week period on five Oriental Medicine meridian points CV4, CV6, CV12, KD1, and PC8. HRV biofeedback was conducted before and after each treatment sessions. Three areas of analyses were done from the test conducted; Time Domain Analysis, Frequency Domain Analysis and Autonomic Nervous System (ANS) balance analysis. Results : Time Domain Analysis has shown increased Standard Deviation of all Normal R-R Intervals (SDNN), and decreased Mean Heart Rate and Physical Stress Index (PSI) levels, with statistical significance (P<0.05). In Frequency Domain Analysis, series of moxa treatments have increased Total Power (TP), Very Low Frequency Oscillation Power (VLF), High Frequency Oscillation Power (HF), normalized HF values while decreasing Low Frequency Oscillation Power (LF), normalized LF and LF/HF ratio with statistical significance (P<0.05). The values of ANS activity, ANS balance, Stress resistance, Stress index, have also shown significant changes. For cardiac stability stroke volume power (SP) and Blood Vessel Tension (BVT) were followed, which were both increased after treatment. All changes were statistically significant (P<0.05). Conclusion : The results have shown a positive correlation between the moxibustion treatments and autonomic nervous system responses on cancer patients through the HRV biofeedback testing. This study suggests possible application of moxibustion treatments for managing ANS functions of cancer patients, although additional studies with larger population are necessary to confirm the data.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제30권6호
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• pp.518-528
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• 2008

Purpose: The long-term experience of using osseointegrated implants for prosthetic rehabilitation of the edentulous patients shows that high success rates can be predictably achieved. Primary implant stability has been identified to be a prerequisite to achieve osseointegration. In this study, we set up the amount of removed bone so that it differed on implant installation site for each group. The influence of each initial stability on secondary stability and osseointegration was compared with time lapse using resonance frequency analysis and histomorphometric analysis. Materials and methods: A total 27 US $II^{(R)}$ (Osstem, Korea) implants were placed in the mandibular edentulous area of 3 beagle dogs. The implant site was prepared by the conventional technique with drills, and three experimental groups were divided into under-drilling group, normal-drilling group and over-drilling group. The Implant Stability Quotient (ISQ) was measured at intervals of immediately, 4, 8, 12 weeks after placement using $Osstell^{(R)}$ mentor RFA. After the animals were sacrificed, histomorphometric evaluation was executed for measuring BIC and BD. Results: 1) The under-drilled group showed most high ISQ value for whole experiment period. 2) Bone-to-implant-contact(BIC) showed the tendency to be increased gradually as the experiment period passed except the 8 weeks of the normal group. 3) The under-drilled group showed most high bone density(BD) level for whole experiment period, and it was expressed the aspect to be increased gradually according to an experiment period passage in the average of all group. 4) Resonance frequency analysis and histomorphometric analysis are presumed by generally proportional. Conclusions: As this research result, it seems that there are some correlation between resonance frequency analysis and histomorphometric analysis. As are accomplished osseointegration stably so that more superior at the region which the overpressure comes to add, it will be applicable method in clinical field.

• 한국농공학회논문집
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• 제49권3호
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• pp.11-20
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• 2007

Estimation of crop consumptive use is a key term of agricultural water resource systems design and operation. The 10-year return period drought has special aspects as a reference period in design process of irrigation systems in terms of agricultural water demand analysis so that crop evapotranspiration (ETc) about the return period also has to be analyzed to assist understanding of crop water requirement of paddy rice. In this study, The ETc of 10-year return period drought was computed using frequency analysis by 54 meteorological stations. To find an optimal probability distribution, 8 types of probability distribution function were tested by three the goodness of fit tests including ${\chi}^2$(Chi-Square), K-S (Kolmogorov-Smirnov) and PPCC (Probability Plot Correlation Coefficient). Optimal probability distribution function was selected the 2-parameter Log-Normal (LN2) distribution function among 8 distribution functions. Using the two selected distribution functions, the ETc of 10-year return period drought was estimated for 54 meteorological stations and compared with prior study results suggested by other researchers.

• 정보처리학회논문지:컴퓨터 및 통신 시스템
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• 제9권5호
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• pp.113-120
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• 2020

한국과학기술정보연구원은 대용량 데이터를 초고속으로 생산·처리·활용할 수 있는 국가슈퍼컴퓨팅시스템을 구축·운영하여 사용자(대학, 연구소, 정부 및 산하기관, 기업체 등)에게 HPC(High Performance Computing) 서비스를 제공하고 있다. 2019년 1월 1일 공식 서비스를 개시한 국가슈퍼컴퓨터 누리온은 한국과학기술정보연구원에서 5번째로 구축한 시스템으로 이론성능 25.7 페타플롭스를 갖는다. 시스템 운영자나 사용자의 관점에서 슈퍼컴퓨터의 사용 방법과 운영 방식을 이해하는 것은 매우 중요하다. 이를 이해하는 작업은 네트워크 트래픽을 모니터링하고 분석하는 것에서 시작된다. 본 논문에서는 누리온 시스템과 슈퍼컴퓨팅서비스 네트워크 및 보안 구성에 대하여 간략히 소개한다. 그리고 슈퍼컴퓨팅서비스 현황을 실시간으로 확인하기 위한 모니터링 체계를 기술하고 서비스를 시작하고 11개월(2019년 1월~11월) 동안 수집된 슈퍼컴퓨팅서비스 네트워크의 인바운드 및 아웃바운드 트래픽과 비정상행위(공격) 탐지 IP 개수에 대한 시계열 및 상관관계 분석을 수행한다.

• 한국지리정보학회지
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• 제20권1호
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• pp.113-126
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• 2017

본 연구의 목적은 빅데이터 분석 기법 중 하나인 텍스트 마이닝 기법을 활용하여 환경 분야의 환경공간정보 활용 연구 동향을 정량적으로 분석하는 것이다. 분석에 활용된 자료는 NDSL (National Digital Science Library)을 통하여 획득한 국내 논문으로 총 869편을 대상으로 하였다. 논문에서 추출된 단어들은 "환경일반", "기후", "대기", 등 환경 분야 10개, "위성영상", "수치지도", "재난재해" 등 환경공간정보 20개로 설정된 분류체계에 따라 재분류 되었다. 재분류된 분류 키워드를 통해, 논문에서 해당 키워드의 출현 빈도 및 시계열 변화를 파악하였으며, 상호 간 연관분석을 수행하였다. 첫째, 빈도 분석 결과 환경 분야에서는 "환경일반"(40.85%)이 환경공간정보에서는 "위성영상" (24.87%)이 가장 높은 활용 빈도를 나타냈다. 둘째, 환경 분야에 대한 시계열 분석 결과 1996년부터 2000년까지는 "기후"에 대한 연구 비중이 높았으나, 2001년부터는 "환경일반"에 대한 연구가 증가하였다. 환경공간정보에서는 "위성영상"에 대한 수요가 전 기간에 걸쳐 가장 높았으며, 활용 비율 또한 점차적으로 증가하고 있었다. 셋째, 환경 분야와 환경공간정보에 대한 연관분석 결과 총 80개의 연관 규칙이 생성되었으며, 환경 분야 중 "환경일반"이 "위성영상", "전자지도" 등 총 17개의 환경공간정보와 가장 많은 수의 연관 규칙을 생성하였다.

• 가정과삶의질연구
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• 제13권4호
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• pp.125-138
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• 1995

The main purpose of this study is to observe correlation between caregiver's burden and care sharing and then to contribute to improve relationship between old parents and their adult children. The research samples were collected by structured questionnare and 507 samples were finnally selected. The data analysis was conducted by the method of frequency mean Pearson's correlation multiple regression The major findings were as follows: Care-sharing was made much in the case of this SES the oldest daughter-in-law living together with old parents and old parents' economic incapacity Caretiver's burden was serious in the case of living with old parents the oldest daughter-in-law and old parents' economic incapacity. And the correlation between care sharing and caregiver's burden was positive.