등척성 신전운동 시 요부근의 근 활성도

유원규,정영종,이재호,김창인 한국전문물리치료학회 2001 한국전문물리치료학회지 Vol.8 No.1

Back extension exercises have been used for rehabilitation of the injured low back, prevention of injury, and fitness training programs. However, excessive loading on low back can exacerbate existing structural weakness. The purpose of this study was to compare muscle activity of low back muscles during back extension exercises. Twenty healthy male subjects were evaluated, Electromyographic (EMG) activities of low back muscles at L1 and L5 level were recorded during seven different back extension exercises and two reference tasks by surface EMG and saved for data analysis. Reference tasks of lifting 20% and 40% of their body weight were included for comparison. The result were as follows: 1) Single-arm extension and single-leg extension exercises on quadruped position appeared to constitute a low-risk exercise for initial extensor strengthening. 2) When arm extension was combined with contralateral leg extension on quadruped position, EMG activities of low back muscles were increased, 3) EMG activity of low back muscles was highest during the trunk extension exercises on prone position. 4) EMG activities of low back muscles during arm and leg extension exercises on quadruped position were less than those of reference task of lifting 40% of their body weight. These results have important implications for progressive back extensor muscle

철을 오염시킨 n-GaAs의Photoreflectance에 관한 연구

유재인,문영희,이동울,이정열,배인호,장광수 嶺南大學校 基礎科學硏究所 1998 基礎科學硏究 Vol.18 No.-

We investigated the variation of PR signals for n-GaAs surface treated with Fe as annealing method. The samples were annealed by isochronal(200∼600 ℃, 10 min) and isothermal(300 ℃, 10 ∼60 min) method. In PR signals measured from isochronal annealed samples, the rate of intensity decreasing for n-GaAs was 49%, and that for n-GaAs surface treated with Fe was 66%. We assumed that the large amount of decreasing intensity for Fe contaminated sample caused by decreasing carrier density due to increasing of ?? neutral acceptor at higher annealing temperature. In PR signals measured from isothermal annealed samples, the signals for annealed n-GaAs decreased with increasing annealing time, and the signals for n-GaAs surface treated with Fe continuously increased with increasing annealing time. It can be assumed that the increasing of PR intensity for Fe contaminated samples as annealing time caused by the diffusion of Fe atoms from the surface.

충청도지역의 노거수 자원

유재은,이정호 명지대학교 자연과학연구소 2003 자연과학논문집 Vol.22 No.-

충청도지역의 노거수 자원 현황을 알아보기 위하여 1999년 3월부터 2003년 12월 10일까지 26개 시·군에 대한 현황조사와 조사된 자료분석을 통하여 다음과 같은 결과를 얻을 수 있었다. 1. 대전광역시를 포함하는 충청도지역 내에는 수령이 100년 이상 된 노거수가 31종류에 2,058본이 분포하고 있음을 알 수 있었다. 2. 이 지역 26개 시·군 중 가장 많은 노거수가 분포되어 있는 곳은 청원·청주시로 9종 193본으로 전체의 9.38%에 이르고, 그 다음이 공주시로 7종 171본이고 8.34%이며 세 번째가 괴산군으로 9종 145본으로 7.05%에 달한다. 3. 이 지역에서 나이가 가장 많은 것으로 알려진 나무는 은행나무로 1,300년 이상이고 충청남도 부여군 내산면 주암리 125번지에 있고, 백제 성왕 때 심겨진 것으로 알려져 있다. 4. 이 지역에 분포하고 있는 상록수는 소나무외 7종 103본으로 전체의 5.00%에 불과하고 낙엽수는 느티나무외 22종 1,955본으로 95.00%에 이른다. 5. 보호관리 유형별로는 정자목이 1.392본 67.64%로 제일 많고 그 다음이 풍치목으로 358본 17.40%이며 세 번째가 당산목으로 244본 11.86%을 차지한다. 6. 이 지역에 분포하고 있는 31개 수종 가운데 상위 5개 수종은 느티나무 1,505본 73.13%, 은행나무 179본 8.70%, 팽나무 120본 5.83%, 왕버들 86본 4.18% 그리고 소나무 50본 2.43% 순이고 이들 5개 수종이 차지하는 분포비율은 94.27%에 이른다. 7. 노거수의 수령별 분포는 500년생 이하가 1,896본으로 92.13%이고 501년생 이상이 162본 7.87%로 500년생 이하가 대부분을 차지한다. 8. 경인지역에서 볼 수 없었던 노거수로서의 왕버들이 이 지역에서 86본 4.18%가 분포하고 있음은 의미 있는 일이라고 생각된다. We have surveyed the distribution of aged-big trees which is growing in 26 cities and subprefecture of Chungcheong prefecture by on-the-spot studying from March of 1999 to December 10th of 2003. The results analyzed from the data are as follows. (I) In Chungcheong prefecture including Daejeon, 2,058 trees were counted as aged-big trees over 100 years old and they were classified 31 kinds of species. (2) 9 species (193 trees) of 9.38% and 7 species (171 trees) of 8.34% were recorded in Cheongwon. Cheongju city and Gongju city, respectively and then 9 species (145 trees) of 7.05% were recorded in Goisan. (3) The oldest tree was estimated to have the age over 1,300 years old, which had been planted in 125 Juamri, Naesanmyon, Buyoegun, Chungcheong Namdo, Korea. (4) The evergreen including Pinus densiflora in this area is 7 species accounted for 5.00% (103 trees) and deciduous with 22 species including Zelkova serratu occupied 95.00% (1,955 trees). (5) Shadow tree 1,392 trees for 67.64%, the Landscape tree 358 trees for 17.40% and the Village keeping tree (God tree) 224 trees for 11.86% have to be protected and managed. (6) The top 5 species of 31 species in this area are Zelkova serrutu (73.13%), 1,505 trees, Ginkgo bilobu (8.70%) 179 trees, Celtis japonicu (5.83%) 120 trees, Sulix glundulosu (4.18%) 86 trees and Pinus densiflora (2.43%) 50 trees. And their proportions was accounted for 94.27% of the distribution rates. (7) The aged-big tree under 500 years old are 1,896 trees occupied 92.13%, over 500 years old are 162 trees occupied 7.87%. (8) It is very meaningful that Salix glandulosa which did not reveal in Kyong-In Area are 86 trees occupied 4.18%.

Classification과 Ordination에 依한 俗離山 森林群集의 分析

兪在殷,宋鎬京 忠南大學校 環境問題硏究所 1989 環境硏究 Vol.7 No.-

Vegetational data from Mt Sokri in central Korea were analysed in relation to 17 environmental variables. Two multivariate methods were applied two-way indicator species analysis (TWINSPAN) for classification and detrended canonical correspondence analysis (DCCA), a recent technique which extracts ordination axes that can be related to environmental factors. The relationship between the distribution of dominant species of forest vegetation and soil condition in Mt Sokri was investigated by analyzing altitude and soil nutrition gradient. Quercus mongolica forest was distributed in the high altitude and good nutrition area, Quercus serrata-Acer pseudo-sieboldianum forest in the medium altitude and good nutrition area, Quercus variabilis and Quercus serrata forest in the medium altitude and medium nutrition area, and Pinus densiflora forest in the low altitude and poor nutrition area. Quercus mongolica forests were distributed in the xeric parts of northern part of warm-temperate deciduous boardleaf forest and in the mesic parts of cool-temperate deciduous boardleaf forest in Korea. The dominant compositional gradient related to altitude.

Al_(0.24)Ga_(0.76)As/GaAs HEMT 구조에서의 표면 광전압에 관한 연구

유재인,김종수,배인호,신영남,박성배 대구대학교 기초과학연구소 2000 基礎科學硏究 Vol.16 No.2

We report a surface photovoltage(SPV) study of Al_(0.24)Ga_(0.76)As/GaAs HEMT structure grown by molecular beam epitaxy. The energies of Eo transition for GaAs and Al_(0.24)Ga_(0.76)As were 1.41 and 1.71 eV, respectively. These values were in good agreement with photo reflectance(PR) measurement. As the frequency is increased from 25 to 55 Hz, the intensity of SPV signal is gradually reduced. Meanwhille, the intensity of SPV signal gradually increased as the temperature increased from 100 K to room temperature. From the former, the surface photovoltage of Al_(0.24)Ga_(0.76)As layer is 8.61 mV, which is about 1.4 times smaller than that of GaAs. This is due to influence of carrier mobility.

Pt계 촉매를 이용한 직접 개미산 연료전지의 특성 연구

유재근,이효송,김진용,김기호,이영우 충남대학교 공업교육연구소 2005 論文集 Vol.27 No.1

Direct Formic Acid Fuel Cells (DFAFCs) are potential alternative power sources for potable devices such as cellular phones, personal digital assistants (PDA) and laptop computers. In this study, we investigated the effect of the anode catalysts on the performance of direct formic acid fuel cell. We made the Pt-Pd catalysts using deposition method for the investigation of the fuel cell performance as a change of temperature and oxidant. Fuel cell with Pt-Pd anode catalyst showed the performance of 120 mW/㎠at room temperature. This result was much higher value than that of Pt-Ru catalyst which showed the best performance of commercial catalyst in our previous works. For this reason, we can conclude that the Pt-Pd catalyst is an excellent material for the oxidation of formic acid.

방위에 따른 속리산과 오대산의 산림군락 구조분석

유재은,이정호,권기원 명지대학교 자연과학연구소 2004 자연과학논문집 Vol.23 No.-

본 연구는 방위에 따른 속리산 및 오대산 삼림식생을 분석하고자 하였다. 속리산 조사구와 오대산 조사구를 방위에 따라 출현하는 주요 종의 중요치를 살펴보면 속리산의 경우 북향에서는 쇠물푸레, 벚나무, 개옻나무, 굴피나무, 참회나무 등 8종에 중요치가 높게 분포하고 있음을 볼 수 있고, 동향에서는 소나무, 고로쇠나무, 산초나무, 소태나무, 작살나무 등 6종이, 남향에서는 굴참나무, 졸참나무, 생강나무, 물푸레나무, 짝자래나무 등 13종이, 서향에서는 신갈나무, 당단풍, 쪽동백나무, 노린재나무, 철쭉 등 13종에 중요치가 높게 출현한다. 오대산의 경우를 보면 북향에서는 당단풍, 까치박달, 거제수나무, 음나무, 잣나무등 18종이 중요치가 높게 분포하고 있음을 볼 수 있고, 동향에서는 전나무, 소나무, 느릅나무, 산벚나무, 들메나무 등 5종이, 남향에서는 신간나무, 물푸레나무, 철쭉, 진달래, 개벚지나무 등 7종이, 서향에서는 피나무, 고로쇠나무, 난티나무, 쪽동백나무, 황벽나무 등 10종이 중요치가 높게 출현함을 알 수 있다. 이러한 결과로 볼 때 속리산에서는 남향과 서향이 각각 13종씩 26종으로 북향과 동향의 14종 보다 배에 가까운 많은 수의 나무들이 중요치가 높게 출현하고 있는 것에 반하여, 오대산에서는 북향과 동향이 각각 18종과 5종씩 23종으로 남향과 서향의 17종 보다 월등히 많게 출현함을 알 수 있다. 이와 같은 결과는 속리산과 오대산이 정반대의 현상으로 속리산이 해발고가 낮고 난온대성 수종의 우위를 점하는 것에 비하여 오대산은 해발고가 높고 냉온대성 수종이 우위를 차지하고 있는데서 오는 현상으로 보여진다. This study was to research environment of the forest vegetation structure according to the directions in Mt. Sokri and Odae. According to direction, the importance value of 8 species of Fraxinus sieboldiana, Prunus serrulate var. spontanea, Rhus trichocarpa ect. appeared highly on the north, 6 species of Pinus densiflora, Acer mono, Zanthoxylum schinifolium ect. highly appeared on the east, 13 species of Quercus variabilis, Quercus serrata, Lindera obtusiloba ect. highly appeared on the south, 13 species of Quercus mongolica, Acer pseudo-sieboldianum, styrax obassia ect. highly appeared appreared on the west in Mt. Sokri. The importance value of 18 species of Acer pseudo-sieboldianum, Carpinus cordata, Betula costata ect. highly appeared on the north, 5 species of Abies holophylla, Pinus densiflora, Ulmus dabidiana var. japonica ect. highly appeared on the east, 7 species of Quercus on the south, 10 species of Tilia amurensis, Acer mono, Ulmus laciniata ect. highly appeared on the west in Mt. Odae

한국판 정신분열형 양가감정 척도[K-SAS]의 개발

이유진,석정호,전종희,안석균,김재진,이홍식 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.1

Objectives : The present study investigated the reliability and validity of Korean version of schizotypal ambivalence scale, which was developed to measure ambivalence in schizotypy, a latent personality organization that provides the liability for the development of schizophrenia. Methods : The psychometric properties of the K-SAS in a sample of 348 normal healthy controls were obtained, Subjects with various range of age and education level of male and female were included in order to investigate the correlation of these demo-graphic variables with the scores of K-SAS. Results : The internal consistency of the scale was 0.85 and split-half reliability was 0.84. The factor analysis revealed four factors which were labeled as ambivalence on identity, decision, love and outcome, respectively. There were significant main effects for age, gender, and education level, In other words, being older, male, and having more years of education had negative effects on the scale score (p<0.05). These main effects were also valid after the interaction between these demographic factors was excluded through ANCOVA. Conclusion : The Korean version of schizotypal ambivalence scale was a valid tool for measuring ambivalence in Schizoph-renia. It was found that being older, male, and having more years of education had negative effects on the scale score, and these effects should be considered when using this scale.

개에서 발생한 폐수종의 치료 증례

김유수,심재현,김건우,김지용,이병희,송근호,이영원,김덕환 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-

A 9 months intact male American bull dog with chief complaints of dry cough, dyspnea and fever was referred to the Veterinary Teaching Hospital, Chungnam National University. Based on the findings of physical examination, radiological examination, and blood and blood chemical examinations, the present patient was diagnosed into pulmonary edema secondary to primary bacterial and aspiration pneumonia. The patient was hospitalized and treated with buscopan, cephazolin and furosemide for 1 week. His activity and appetite was returned to normal and thoracic radiographs revealed that Jung was recovered to the normal condition after treatment for 7 days. The present patient was a case with pulmonary edema showed favorable therapeutic responses to proper medication.

국내 설사환자로부터 분리된 Escherichia coli 균의 혈청군 및 Verocytotoxin 생성능

김호훈,강연호,김성한,박미선,유재연,이복권 대한감염학회 1998 감염 Vol.30 No.5

목적: 국내 설사 환자에게서 분리 동정된 인체 감염 유래 E. coli 균의 혈청군, verocytotoxin 생성능을 구명하여 EHEC 균의 인체 감염 실태를 구명하고, 동물 및 식품 유래 분리균주의 성상과 비교 검토하여 인체 감염 위험성에 대한 기초적 자료를 의학계에 제공하고자 하였다. 방법: EHEC 감염의심 설사 환자 분변 검체로부터 분리된 균주 중 생화확적 성상에 따라 대장균을 분리하였고 이들 균주 중 E. coli O157:H7를 분리하기 위해서는 Dsorbitol 음성균을 선별하였으며, 분리균에 대하여 항혈청으로 응집 시험을 실시하여 혈청군을 구명하였다. 혈청군이 확인된 균주에 대하여 중합효소 연쇄반응 (PCR) 및 역수동라텍스 응집시험 (Reversed Passive Latex Agglutination:RPLA) 으로 verocytotoxin 생성능을 구명하였다. 결과: 장출혈성 대장균 감염 의심설사 환자의 분변검체로부터 25주의 E. coli 균을 분리 동정하였으나 이들 균주는 모두 verocytotoxin을 생성하지 않았다. 분리 동정된 대장균으로부터 확인된 혈청군은 16종으로서 E. coli O1, O6, O8, O15, O20, O25 O26, O28, O29, O44, O86a, O119, O126, O128, O152, 및 O157:H-였으며 E. coli O157:H-혈청형 균주와 E.coli O25 혈청군 균주가 각각 3주씩 분리되어 비교적 높은 분리율을 보였다. 결론: 장출혈성 대장균 감염 의심설사 환자 분변 가검물로부터 총 25주의 E. coli균을 분리 동정하였으나 verocytotoxin을 모두 생산하지 않았다. Background: Since 1982, many countries has reported outbreaks or sporadic cases caused by enterohaemorrhagic Escherichia coli (EHEC) serogroup strains, mainly E. coli O157:H7 type strain. However, systemic investigation about EHEC agents, including E. coli O157:H7, have not been done in Korea. Therefore, we investigated serogroup and verotoxin productivity of E. coli strains isolated from diarrheal patients and estimated risk of human infection in comparison with EHEC strains isolated from cow, pig, and food material in Korea. Methods: Diarrheal patient stool samples were collected and E. coli strains were isolated, according to biochemical characteristics. In order to isolate E. coli O157:H7, D-Sorbitol negative strains were selected. Serogrouping of the E. coli isolates was done by agglutination test. Verocytotoxin productivity was investigated by polymerase chain reaction (PCR) and reversed passive latex agglutination (RPLA). Human infection risk was estimated in comparison with EHEC strains isolated from cow, pig and food materials in Korea. Results: Twenty-five E. coli strains were isolated from the diarrheal patients who were suspected to be infected with EHEC. However, none of these E. coli strains produced verocytotoxin. Out of 25 E. coli isolates, 16 serogroups of E. coli O1, O6, O8, O15, O20, O25, O26, O28, O29, O44, O86a, O119, O126, O128, O152 and 157:H-were found. In each of the E. coli O157:H-and O25 serogroups 3 strains were found. Conclusion: None of 25 E. coli isolated from diarrheal patients who were suspected of EHEC infection produced verocytotoxin producing E. coli have been reported recently in Korea.