DLTS에 의한 열처리시킨 HB-GaAs에서의 깊은준위

崔玄泰,金仁洙,孫貞植,裵仁鎬,金相基 嶺南大學校 基礎科學硏究所 1993 基礎科學硏究 Vol.13 No.-

Deep levels in horizontal Bridgman(HB) undoped GaAs were investigated by DLTS system personally manufactured. In as grown sample, three electron traps of which activation energies are T1(E?-0.32eV), T2(E?-0.54eV) and T3(E?-0.82eV) were observed. As sample was annealed at 650℃, T3 level was separated into T3?(E?-0.74eV) and T3 level. When sample was annealed at 800℃, only T3* level was observed. For sample annealed at 900℃, T3* and T3 level were observed. From these results, EL2's origin is very complicated complex and explanation is very difficult, but the model of As??-V??-A??-V?? is enough to explain the EL2's behavior of annealing temperature.

물리치료사들의 대체의료에 관한 인식도 조사

김영희,김기열,배주환,김상수,남철현 경산대학교 보건복지연구소 2000 保健福祉硏究 Vol.5 No.-

This study was conducted to examine physical therapists' awareness of alternative medicine and their treatment. 250 physical therapists who were working in Daegu were selected as subjects of this study. Data were collected from February 21, 2000 to March 31, 2000. The results of this study are summarized as follows. 1. Among 218 respondents, 72.7% of them directly experienced alternative medicine. According to general characteristics of the respondents, 79.0% of them who were in thirties had experiences in alternative medicine. 83.3% of the respondents who had worked for above twenty years experienced alternative medicine and 90.0% of the respondents who were working in Oriental medical clinics had experiences in it. 79.8% of the respondents who had been married experienced alternative medicine and 88.4% of them who were Buddhists had experience in it. 2. The sources of information on alternative medicine were newspapers and broadcast (22.9%), seminars of related associations (22.5%), and Books (20.0%). 3. The respondents experienced alternative medicine for the purpose of treating their chronic diseases (67.0%), improving their energy and quality of life (20.5%), and improving their weak physical constitution (13.4%). 4. According to the respondents' trust in alternative medicine, 40.8% of them trusted chiropractic, while 25.2% of them trusted massage and finger-pressure therapy. 19.7% of them trusted taping therapy and 15.1% of them trusted sports massage. 5. 67.0% of the respondents treated patients by alter native medicine in the hospitals and clinics. In the case of treatment methods by alternative medicine, 35.3% of them gave patients the massage and finger-pressure. 33.0% of them adopted taping therapy and 24.3% of them tried to treat patients by chiropractic. 17.0% of them applied moxacautery, while 15.1% of them gave patients the sports massage. 6. The respondents adopted alternative medicine to treat following diseases: lumbago (57.5%), shoulder pain (51.8%), sciatica (39.9%), arthritis (36.2%), headache (31.1%), hypertension (24.3%), diseases of the peripheral nervous system (22.4%), diseases of digestive organ (14.6%), insomnia (12.3%), obesity (8.7%), stroke (5.5%), allergy and skin diseases (4.1%), cystitis (3.6%). 7. According to their motives of concern about alternative medicine, 59.1% of them were interested in it because they expected additional effect which could be obtained from it in parallel with Western medicine. 16.7% of them were concerned about alternative medicine because they lacked ability to solve patients' clinical problems, while 15.3% of them were interested in it because they acknowledged the effect of it. 8.9% of them had interest in alternative medicine because they were dissatisfied with medical and scientific approach of Western medicine. 8. 73.4% of the respondents thought that alternative medicine needed to be introduced in the college/university curriculum

PFAPA (Periodic Fever, Aphthous Stomatitis, Pharyngitis, and Cervical Adentis) 증후군 1예

강혜련,김신우,배기범,박지현,강영모,이종명,김능수 대한감염학회 2001 감염 Vol.33 No.3

PFAPA (Periodic Fever, Aphthous stomatitis, Pharyngitis, and cervical Adenitis) syndrome has characteristic features of an early onset, periodicity (interval <4 weeks), and a brisk rising high fever (>39℃) of 3 to 6 days' duration without signs of infection. An 18-year-old male was admitted for high fever, sore throat, headache, and abdominal pain. He had suffered from periodic fevers associated with pharyngitis and cervical adenitis for 14 years without any evidence of infection. The fever recurred approximately every 4 weeks lasting 4 to 7 days with intervening asymptomatic periods. Physical examination was unremarkable except for slightly injected tonsils. Most laboratory tests including CBC were normal except for elevation of Creactive protein level (3.47 mg/dL). Bacteriologic and radiologic studies were negative. The fever was spontaneously subsided in 6 days. To our knowledge, this is the first case report of PFAPA syndrome in Korea. (Korean J Infect Dis 33:219∼222, 2001)

중년후기 여성의 폐경관리와 삶의 질에 영향을 미치는 요인 분석

차경미,남철현,배성욱,서인선,김기열 慶山大學校 保健福祉硏究所 2002 保健福祉硏究 Vol.7 No.-

This study was conducted to identify influencing factors to management of menopause and quality of life and also to develope the developing education program of HRT(hormone replacement therapy) for healthy aging women. The hypothetical model explaining health promoting behavior and quality of life was constructed on the basis of Pender's health promotion model, Nho's quality of life model. The empirical data for testing the hypothetical model consisted of 356 late-middle aged(45~64) women who visited from 5th september to 20th september, 1999, in Pohang city. The reliabilities of instruments were adequate(Cronbach's alpha=0.7941, -0.9098). SPSS PC+ program were utilized for descriptive statistics and covariance structure analysis. The summary of research results was as follows: 1) The influential factors to management of menopause showed: The directed factors were the influences of family(β=.29), economical status(β=-.12), experienced symptoms of menopause(β=.24), multidimensional health locus of control(β=.15), subjective health status of compared with to another person(β=-.18). The indirected factors were the influences of family(β=.04), age(β=.05), experience of HRT's information(β=.02), belonging to occupation(β=-.03), stop of menstruation(β=-.02). 2) The influential factors to quality of life showed: The directed factors were the influences of family(β=.39), self efficiency(β=.15), subjective health status(β=-.31). The indirected factors were the influences of family(β=.37), age(β=-.97), belonging to occupation(β=.01), educational status(β=.21), a monthly income(β=.26). In conclusion, the purpose for "Healthy aging" in late-middle aged women is increasing of the quality of life after menopause. All the health providers have to efforts and harder study for developing health maintenances and health aging in late-middle aged women. Consequently, we need many kinds of public health education programs. And farther more, the developing HRT's educational program is very important in late middle-aged women's healthy aging.

대황황련해독탕의 사염화탄소 유발 간장해 보호효과 미치 급성독성

김영석,정은아,장종철,양형길,김남재,조기호,배형섭,이경섭,김동현 WHO COLLABORATING CENTRE FOR TRADITIONAL MEDICINE 2002 東西醫學硏究所 論文集 Vol.2002 No.-

ABSTRACT - This study was performed to evaluate hepatoprotective effect of daewhang-whangryunhaedok-Tang(DWT) on liver injured rats induced by CCI_4 and the acute oral toxicity of it in mice. The activities of serum transaminase(ALT/AST), alkaline phosphatase(ALP) and lactic dehydrogenase(LDH), the levels of serum total cholesterol(TC) and triglyceride(TG), change of liver enlargement, and inhibitory activities of lipid perotidation, catalase and glutathione-S-transfrease(GST) in liver microsome were determined in hepatotoxic rats induced by CCI_4. DWT was significantly reduced the serum ALT, AST, ALP, LDH. TC and TG lecels. And, the increase of lipid peroxidation, decrease of catalase and GST activities in the liver microsome of CCI_4-intoxicated rat were significantly improved by the treatment of DWT. Male and female mice were administered maximum dosages of 5.000 mg/kg b.w. of DWT. After single oral administration of DWT to mice, we observed them daily for 2 weeks.DWT did not induce any toxic signs in the mortalitie, clinical signs, body weight changes, and gross necropsy finfings of mice. Based in these results. It is concluded that DWT may have the hepatoprotective effect on CCI_4 induced hepatotoxicity in rats. Also. DWT may have no side effect and its LD_50 value may be over 5.000mg/kg b.w. in mice.

대황황련해독탕의 항고지혈증 작용

김영석,정은아,장종철,양형길,김남재,조기호,배형섭,이경섭,김동현 경희대학교 동서의학연구소 2001 東西醫學硏究所 論文集 Vol.2001 No.-

Whangryunhaedok-Tang (WT) is formulated with Coptidis Rhizoma, Phellodendri Cortex, Scutellariae Radix and Gardeniae Fructus, and Daewhang-whangryunhaedok-Tang (DWT) is made by the combination of Rhei Rhizoma, a wellknown anticostipation drug in WT. Therefore, DWT has been evaluated for antihyperlipidemic effects on experimental hyperlipidemic rats and mice induced by corn oil and high cholesterol-diet. Oral administration of DWT significantly inhibited the increase of serum triglyceride and LDL-cholesterol levels, and the decrease of serum HDL-cholesterol levels in hyperlipidemic rats induced by corn oil. Also, oral administration of DWT significantly prevented the increase of serum total cholesterol, triglyceride and LDL-cholesterol, and liver total cholesterol and triglyceride in 1% cholesterol-diet fed mice. These results suggest that DWT is effective for the treatment of hyperlipidemia.

Evaluation of Disaster Response System Using Agent-Based Model With Geospatial and Medical Details

Bae, Jang Won,Shin, Kyohong,Lee, Hyun-Rok,Lee, Hyun Jin,Lee, Taesik,Kim, Chu Hyun,Cha, Won-Chul,Kim, Gi Woon,Moon, Il-Chul IEEE 2018 IEEE transactions on systems, man, and cybernetics Vol.48 No.9

<P>Many disasters have occurred around the world and have caused sizable damage. A disaster, called a mass casualty incident (MCI), generates a large number of casualties that overwhelm the capacity of local medical resources, and the disaster responses to the MCI requires many interactions among the disaster responders. To evaluate the efficiency of the disaster responses against MCIs, this paper proposes an agent-based model describing the cooperations among the responders during the overall process in the disaster responses from transporting patients to their definitive care. In particular, the proposed model includes geospatial details, such as the road network and the location of hospitals around the disaster scene, and medical information, such as the distribution of medical resources and transporting units, in the region of interest to discover the key factors of the disaster response system that customized to the target region. The case study in this paper presents that the proposed approach was applied to describe a disaster response system and illustrates how the additional details are utilized to analyze the disaster response system. We expect that the proposed method can provide comprehensive insights to a disaster response system of interest, and it can be used as groundwork for improving the disaster response system.</P>

Effect of Particle Size on the Dielectric and Piezoelectric Properties of 0.95(K_0.5Na_0.5)NbO₃-0.05BaTiO₃ Lead-free Piezoelectric Ceramics

Bae, Seon-Gi,Shin, Hyea-Gyiung,Chung, Kwang-Hyun,Yoo, Ju-Hyun,Im, In-Ho The Korean Institute of Electrical and Electronic 2015 Transactions on Electrical and Electronic Material Vol.16 No.4

The particle sizes of 0.95(K_0.5Na_0.5)NbO₃-0.05BaTiO₃ powder were controlled by secondary milling time after calcination. The average particle sizes, Dmean, of 0.95(K_0.5Na_0.5)NbO₃-0.05BaTiO₃ powders were critically changed from 14.31 μm to 0.91 μm by secondary milling time. The dielectric and piezoelectric properties of 0.95(K_0.5Na_0.5)NbO₃-0.05BaTiO₃ ceramics depended on the particle sizes of powders after calcination and the secondary milling process. As secondary milling times after calcination were increased to more than 48 hr, the dielectric and piezoelectric properties of 0.95(K_0.5Na_0.5)NbO₃-0.05BaTiO₃ ceramics were deteriorated.

Morroniside Protects C2C12 Myoblasts from Oxidative Damage Caused by ROS-Mediated Mitochondrial Damage and Induction of Endoplasmic Reticulum Stress

Hwangbo Hyun,Park Cheol,Bang EunJin,Kim Hyuk Soon,Bae Sung-Jin,Kim Eunjeong,Jung Youngmi,Leem Sun-Hee,Seo Young Rok,Hong Su Hyun,Kim Gi-Young,Hyun Jin Won,Choi Yung Hyun 한국응용약물학회 2024 Biomolecules & Therapeutics(구 응용약물학회지) Vol.32 No.3

Oxidative stress contributes to the onset of chronic diseases in various organs, including muscles. Morroniside, a type of iridoid glycoside contained in Cornus officinalis, is reported to have advantages as a natural compound that prevents various diseases. However, the question of whether this phytochemical exerts any inhibitory effect against oxidative stress in muscle cells has not been well reported. Therefore, the current study aimed to evaluate whether morroniside can protect against oxidative damage induced by hydrogen peroxide (H2O2) in murine C2C12 myoblasts. Our results demonstrate that morroniside pretreatment was able to inhibit cytotoxicity while suppressing H2O2-induced DNA damage and apoptosis. Morroniside also significantly improved the antioxidant capacity in H2O2-challenged C2C12 cells by blocking the production of cellular reactive oxygen species and mitochondrial superoxide and increasing glutathione production. In addition, H2O2-induced mitochondrial damage and endoplasmic reticulum (ER) stress were effectively attenuated by morroniside pretreatment, inhibiting cytoplasmic leakage of cytochrome c and expression of ER stress-related proteins. Furthermore, morroniside neutralized H2O2-mediated calcium (Ca2+) overload in mitochondria and mitigated the expression of calpains, cytosolic Ca2+-dependent proteases. Collectively, these findings demonstrate that morroniside protected against mitochondrial impairment and Ca2+-mediated ER stress by minimizing oxidative stress, thereby inhibiting H2O2-induced cytotoxicity in C2C12 myoblasts.

재래시장 전기설비 감시시스템 Test-Bed 설계 방안

김기현(Gi-Hyun Kim),이상익(Sang-Ick Lee),전현재(Hyun-Jae Jeon),배석명(Suk-Myong Bae) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.10

This paper in order to reduce the electric disaster damage which is caused by with electric equipment of traditional market developed the electric safety monitoring system which is suitable in traditional market. With for this did the actual condition investigation about electrical equipment of traditional market and we constructed Test-bed for testing reliability of electric safety monitoring system. Also experiment led in Test-bed and confirmed a stability. This paper following will be used with the data for the reliability security of the electric safe system operation which follows in the traditional market actual proof equipment construction which will be advanced.