• 한국전산구조공학회논문집
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• 제29권1호
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• pp.9-18
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• 2016

고층빌딩이나 해양 라이저와 같은 세장 구조물은 구조시스템의 동적 불안정의 주요 원인인 와류유기진동(vortex-induced vibration, VIV)에 의한 동하중에 매우 취약하다. 와류유기진동이 라이저의 고유진동수 영역에서 발생하는 경우 Lock-in현상으로 피로파괴의 우려가 있다. 본 논문에서는 Lock-in 영역에서 구조물과 유동의 동적거동에 대한 수치해석을 다루었으며, 유동조건 변화에도 불구하고 공진 주파수가 유지되는 현상에 대해 분석하였으며, 유입유동에 대해 수직방향으로 자유진동하는 1자유도의 2차원 원형실린더 단면에 대한 비정상 층류를 가정하였다. 각 시간 단계에서 물체의 움직임을 고려하여 유동장 격자를 재생성하며 비정상 유동과 물체의 운동에 대한 지배방정식을 순차적으로 수치해석하여 유체-구조 연성해석을 수행하였다. 결과는 선행연구와 잘 일치함을 보여주었고, Lock-in 현상에 대한 특성을 잘 나타내었다. Lock-in 영역에서는 양력뿐만 아니라 항력도 크게 증가함을 보여주었으며, 실린더의 수직변위는 직경의 20%까지 이름을 나타내었다. 양력과 수직변위의 상관분석을 통해 실린더가 Lock-in 영역에서 양력과 수직변위의 위상차가 동기로부터 반동기로 천이함을 확인하였으며, 이러한 변화가 Lock-in 영역에서 나타나는 공진거동의 원인이 되는 것으로 판된되었다.

• 대한한방내과학회지
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• 제43권4호
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• pp.769-778
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• 2022

Objectives: The purpose of this study was to report the effectiveness of Korean medicine in the treatment of persistent postural-perceptual dizziness. Methods: A patient with dizziness was treated with Banhabackchulchunma-tang and Gongjin-dan herbal medicines. The severity of symptoms was assessed with a daily visual analog scale (VAS) for dizziness and the frequency of subjective trembling feelings (over 30 minutes). Results: After the treatment, the severity of dizziness was reduced from VAS 5 to VAS 2, and fatigue was improved from VAS 5 to VAS 1. The frequency of subjective trembling feelings was reduced from once every 3-4 days to once every 10 days. Other symptoms, such as dyspepsia, sleep disturbance, and hot flashes, also showed improvement. Conclusion: Treatment with Korean medicine may be an effective option for the treatment of persistent postural-perceptual dizziness.

• 대한한의학방제학회지
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• 제19권1호
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• pp.51-58
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• 2011

Objectives : This study was performed to investigate applications of 171 prescriptions including Astragali Radix and Angelicae gigantis Radix in Dongeuibogam. Methods : 171 prescriptions including Astragali Radix and Angelicae gigantis Radix which have been used separately or concurrently in Oriental Medicine for a long time as a treatment for various disease in Dongeuibogam were studied through order of frequency, symptoms, dosages, etc. Results : 1. 27 times(15.79%) prescriptions are recorded in intumescence chapter, 21 times(12.28%) in fatigue chapter, 11 times(6.43%) in women chapter and 9 times(5.26%) in anus chapter, which are arranged in order of frequency. 2. Yin-yang deficiency treat herbs are ranked top, eliminating intumescence methods, bloody stool, discharging blood from one's vagina, yang deficiency treat herbs are ranked in order of frequency among 107 symptoms in prescriptions including Astragali Radix and Angelicae gigantis Radix. 3. The dosages of Astragali Radix which is more used than Angelicae gigantis Radix are ranged from 3 puns:1 pun ~ 2 nyangs:1.5 nyangs. 1 jeon:5 puns is recorded 8 times(14.29%), 2 jeon:1 jeon is 7 times(12.50%), 1 jeon:3 puns and 1 jeon:7 puns are 24 times(11.2%), 1 nyang is 21 times(9.8%), same amount is 11 times(5.1%), 5 pun is 4 times(7.14%) each, 1.5 jeon:5 puns is 3 times(5.36%) used among 56 prescriptions including Astragali Radix and Angelicae gigantis Radix. 4. The dosages of Astragali Radix which is used same amount Angelicae gigantis Radix are ranged from 2.5 puns each ~ 2 nyangs each, 2.5 chons, same amount each. 1 jeon each is recorded 36 times(38.71%), 1 nyang each is 15 times(16.13%), 0.7 jeon each is recorded 12 times(12.90%), 0.5 jeon each is recorded 6 times(6.45%) used among 93 prescriptions including Astragali Radix and Angelicae gigantis Radix. 5. The dosages of Astragali Radix which is less used than Angelicae gigantis Radix are ranged from 3 puns:7 pun ~ 5 nyangs:12 nyangs. 1 jeon:1.5 jeons is recorded 3 times(13.64%), 0.8 jeon:1 jeon and 1 nyang:2 nyangs are 2 times(9.09%) each, the others are 1 time(4.55%) used among 22 prescriptions including Astragali Radix and Angelicae gigantis Radix. 6. The dosages of (Astragali Radix $\gg$ Angelicae gigantis Radix), (Astragali Radix = Angelicae gigantis Radix) and (Astragali Radix $\ll$ Angelicae gigantis Radix) which are recorded by counts (decoction groups: the other groups) are 52:4(92.86%:7.14%), 70:23(75.27%:24.73%), 13:9 (59.09%:40.91%) respectively. 7. The less using dosage of Astragali Radix and Angelicae gigantis Radix has a more percentage of decoctions groups, The more using dosage of Astragali Radix and Angelicae gigantis Radix has a more percentage of the other groups except decoctions. The less using prescriptions have an effects of controling yin and yang, enhancing blood and chi, etc, as a whole. The more using prescriptions as a form of compound powder have an effects in incurableness disease, chronic diseases, etc. Conclusions : The 171 prescriptions including Astragali Radix and Angelicae gigantis Radix in Dongeuibogam are mainly composed of Dangguibohyul-tang, Samool-tang, Sagoonja-tang and Gobangpoong-tang, Gamri-hwan, etc.

• 대한한방내과학회지
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• 제29권2호
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• pp.359-374
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• 2008

Objective : Hyperhidrosis is a condition characterized by excessive sweating. Some studies suggest that hyperhidrosis is associated with autonomic nervous system dysfunction. Hyperhidrosis is often accompanied by hypersensitivity, tension, irritability, heat flashes, fatigue, etc. This study was designed to evaluate the correlation between Oriental Medicine diagnosis and the autonomic nervous system function in patients with hyperhidrosis using Heart Rate Variability (HRV) analysis. Methods : 23 palmar and plantar hyperhidrosis patients and 10 systemic hyperhidrosis patients were recruited and evaluated by Oriental Medicine diagnostic questionnaire and HRV analysis. The Oriental Medicine diagnostic questionnaire used a three-dimensional diagnosis that classified patients into Cold or Heat Syndrome, Yin or Yang Syndrome, and Deficiency or Excess Syndrome. Measured indices of HRV used the frequency domain analysis(i.e. TP, VLF, LF, HF and LF/HF ratio). Also, measure indices of HRV adjusted for aging effects were evaluated. Results : Cold/Heat Syndrome was not associated with hyperhidrosis prevalence nor the HRV analysis in hyperhidrosis patients. The Yang Syndrome group(78.8%) was more strongly correlated than the Yin Syndrome group(21.2%), and character of Yang was correlated with the adjusted TP and adjusted LF. The LF/HF ratio in the Excess Syndrome group was significantly higher than the LF/HF ratio in the Deficiency Syndrome group. Conclusion : Hyperhidrosis was not associated with the Cold/Heat Syndrome, but was found to be closely associated with the Yang Syndrome. The LF/HF ratio was significantly higher in the Excess Syndrome group than in the Deficiency Syndrome group in hyperhidrosis patients.

• 한국산학기술학회논문지
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• 제21권6호
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• pp.475-481
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• 2020

본 연구는 2019년 청소년 건강행태조사 온라인 조사 자료를 활용하여 연구대상자의 인구사회학적 특성, 정신건강 관련 특성을 알아보고 그에 따른 주관적 건강인지, 평상시 스트레스인지, 자살생각·자살계획·자살시도에 영향을 미치는 요인들을 알아보고자 하였다. 전체 청소년 대상자는 57,303명이며, 그 중 고등학생 27,919명(48.7%), 중학생이 29,384명(51.3%)이었다. 주관적 건강인지, 평상 시 스트레스 인지, 최근 12개월 동안 자살생각·자살계획·자살시도 등의 정신건강과 관련된 요인을 찾아보기 위해 연구대상 청소년들의 일반적인 특성 및 건강관련 특성 뿐 아니라 그들의 연관성을 분석하였다. 그 결과 청소년의 성별, 학교구분, 거주형태(부모님과의 동거여부), 경제상태, 학업성적, 주중 인터넷 사용시간, 흡연경험, 음주경험, 약물경험, 학교폭력치료경험, 성관계경험, 최근 7일 동안 잠으로 피로회복 정도, 최근 12개월 동안 슬픔 및 절망감 경험 등의 변수를 이용한 결과 모든 변수들이 그 정도는 다르나 정신건강에 영향을 미치는 것을 알 수 있었다(p<0.05). 본 연구의 결과를 토대로 청소년의 건강행태 개선 및 정신건강 관련 예방적 대책 수립을 위한 기초 자료로 삼고자 한다.

• Journal of Acupuncture Research
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• 제21권3호
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• pp.215-229
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• 2004

Objective : We had a clinical report in headache but didn't in migraine. We have planned this study in order to get the basic data of migraine in oriental medicine. Methods : The patient of 36 in migraine checked sex, age, onset, family history, severity of pain, influences of life, induced cause, clinical pain characteristics, associated symptom, treatment style, and prescription, frequency, using period of analgesics by a questionnaire and differentiated syndromes in migraine and evaluated autonomic bioelectric response recorder(ABR-2000). Results : There are 23.4% in prevalence rate of migraine. The ratio of sex is M:F=1:17. The age of an attack is the highest in thirties. The patient are the most in forties. The mean duration of illness is $12.0{\pm}9.9$ years. 83.4% had a family history. 61.1% had a moderate grade in severity of pain. 77.8% selected fatigue in induced cause of migraine. 69.4% had tingling sense, nausea and vomiting in the associated symptoms. 91.7% used analgesics for treatment and 51.5% of them used analgesics voluntarily. 61.9% of them take analgesics less than once in a week. 33.6% had the phlegm syncope headache in differentiation of syndrome. In ABR-2000 results, item of graph showed low tendency mostly. Conclusions : We expected that this report of clinical progress, differentiation of syndromes and ABR-2000 results in migraine would be used basic data by oriental medicine to treat migraine.

• 한국항공우주학회지
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• 제41권11호
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• pp.891-899
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• 2013

본 논문에서는 전투기 주구조물에 적용할 수 있는 안테나 내장 스킨구조(CLAS)의 새로운 시험평가 절차를 제시하였다. 대수 주기 패치형 안테나를 통신항법용 다중대역 안테나로 설계하였다. 탄소/유리 섬유 강화 적층 복합재(CFRP/GFRP)를 공력하중을 지지하기 위한 구조로 사용하고 안테나 성능 향상을 위해 하니컴 층을 적층하였다. 여러 재질로 구성된 다층구조의 안테나 내장 스킨구조를 고온의 오븐에서 경화하였다. 내장된 안테나의 이득, 전압 정재파비, 방사패턴을 0.15GHz~2GHz 주파수 범위에서 무반향 챔버시설을 이용하여 측정하였다. 안테나 내장 스킨구조의 구조강도를 평가하기 위하여 인장, 전단, 피로, 충격 하중을 부가하는 구조시험을 수행하였다. 각각의 구조시험 후에 안테나 성능시험을 수행하여 초기 값과 비교하므로써 구조시험이 안테나에 미치는 영향을 확인하였다. 새로 개발한 안테나 내장 스킨구조 시험평가 절차를 통신항법용 CLAS에 적용하여 설계개선이 필요한 점을 발견하였다.

• Journal of Yeungnam Medical Science
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• 제9권1호
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• pp.156-166
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• 1992

1987년 1월 부터 1991년 6월 까지 영남대학교 영남의료원 정신과에 외래 및 입원한 정서장애 환자중 불안장애로 진단 받은 환자 남자 127명(77.3%), 여자 38명(23.0%)인 총 165명을 대상으로 하였다. 이들에게 Zung의 자가 평가 불안척도를 사용하여 불안을 측정한 결과는 다음과 같다. 불안성적의 평균 총점은 $42.40{\pm}7.74$을 보였다. 불안의 항목별 상위성적은 두통 및 신체동통, 피로, 불안, 공황, 빈뇨 등의 순서로 높았다. 항목별 하위성적은 초조, 우려, 호흡곤란, 발한, 불면 등의 항목이었다. SAS에서 심계항진과 공포, 심계항진과 진전, 피로와 혼돈, 졸도와 현기증, 공포와 불안, 악몽과 공포, 혼돈과 공황, 현기증과 혼돈, 심계항진과 공황, 피로와 두통 및 신체동통, 혼돈과 불안, 공황과 불안, 감각이상과 심계항진, 진전과 공포, 진전과 불안, 공황과 공포 등의 문항 간에는 확실히 상관이 있었다. 성적 분포는 50점 이상인 경우가 17.5%(29명)이였다. SAS에서 각 문항들의 신뢰도는 Cronbach 알파를 사용하여 검토한 결과 비교적 양호한 것으로 나타났다. SAS의 문항 전체의 신뢰도는 0.71로 나타났다.

• 한국도로학회논문집
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• 제17권2호
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• pp.55-62
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• 2015

Cracking is an inevitable fact of asphalt concrete pavements and plays a major role in pavement deterioration. Pavement cracking is one of the main factors determining the frequency and method of repair. Cracks can be treated with a number of preventative maintenance actions, including overlay surface treatments such as slurry sealing, crack sealing, or crack filling. Pavement cracks can show up as one or all of the following types: transverse, longitudinal, fatigue, block, reflective, edge, and slippage. Crack sealing is a frequently used pavement maintenance treatment because it significantly extends the pavement service life. However, crack sealant often fails prematurely due to a loss of adhesion. Because current test methods are mostly empirical and only provide a qualitative measure of the bond strength, they cannot accurately predict the adhesive failure of the sealant. This study introduces a laboratory test aimed at assessing the bonding of hot-poured crack sealant to the walls of pavement cracks. A pneumatic adhesion tensile testing instrument (PATTI) was adopted to measure the bonding strength of the hot-poured crack sealant as a function of the curing time and temperature. Based on a limited number of test results, the hot-poured crack sealants have very different bonding performances. Therefore, this test method can be proposed as part of a newly developed performance-based standard specification for hot-poured crack sealants for use in the future. PURPOSES : The purpose of this study was to evaluate both the adhesion and failure performance of a crack sealant as a function of its curing time and curing temperature. METHODS: A pneumatic adhesion tensile testing instrument (PATTI) was adopted to measure the adhesion performance of a crack sealant as a function of the curing time and curing temperature. RESULTS: With changes in the curing time, curing temperature, and sealant type, the bond strengths were found to be significantly different. Also, higher bond strengths were measured at lower temperatures. Different sealant types produced completely different bond strengths and failure behaviors. CONCLUSIONS: The bonding strength of an evaluated crack sealant was shown to differ depending on various factors. Two sealant types, which were composed of different raw materials, were shown to perform differently. The newly proposed test offers the possibility of evaluating and differentiating between different crack sealants. Based on alimited number of test results, this test method can be proposed as part of a newly developed performance-based standard specification for crack sealants or as part of a guideline for the selection of hot-poured crack sealant in the future.

• 대한한방부인과학회지
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• 제33권2호
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• pp.77-89
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• 2020

Objectives: The purpose of this study is to analyse current status and treatment of the Korean medicine hospital after chemotherapy in patients with breast cancer. Methods: We investigated the medical records of 21 patients who admitted to Korean medicine hospital after chemotherapy in patients with breast cacner from March 1, 2017 to December 31, 2019. We searched medical records retrospectively and analyzed current status and treatment of Korean medicine hospital. Results: The average age of 21 participants was 52.81±8.38 years and 40s and 50s accounted for 85.6% of the total. After receiving chemotherapy, the average time to hospitalization was 1.87±3.13days and average hospital stay was 9.78±4.14 days. The subjects were classified as 28.6% of stage I, 52.4% of stage II, 9.5% of stage III, and 9.5% of stage IV. The analysis according to the presence of metastasis was 57.1% without metastasis, 33.3% with axillary lymph node metastasis, and 9.5% with distant metastasis. The main symptoms complained when hospitalized by 21 subjects were nausea (54.2%), fatigue (54.2%), and anorexia (50.8%) in over 50%, pantalgia (47.5%), and insomnia (47.5%), dizziness (44.1%), cold sweating (42.4%), lower extremity pain (40.7%), 37.5~37.9℃ fever (39.0%), headache (37.3%), hot flush (37.3%), pruritus (30.5%) are 30% or more. Korean medicine treatment was performed in 87.4% of all hospitalizations and Gwakhyangjunggi-san-gami was the most administered prescription. Extracts of Korean medicine was performed in 100.0% of all patients and Eunkyo-san was most administered extracts medicine. Acupuncture, moxibustion, and cupping treatments were performed in all 21 study subjects. Other treatments was performed at a frequency of hyperthermia (90.5%), lymph massage (23.8%), air compression therapy (23.8%), and Interference current therapy (19.0%) Conclusion: Korean traditional medicine can be used as a countermeasure for side effects after chemotherapy in breast cancer patients.