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      • KCI등재

        축구선수의 Detraining과 Retraining이 혈청지질 및 호르몬농도에 미치는 영향

        정정화,박재현,채종훈,성혜련,황지인,윤미숙,노금선,윤종관,윤영학,노순덕,정경숙,박일규,김은희,박현태,박상갑 대한스포츠의학회 1999 대한스포츠의학회지 Vol.17 No.1

        The purpose of this study was to investigate the effects of detraining and retraining on serum lipid and hormones in soccer players. Subjects were seven male high-school soccer players. V˙O_2max was determined for each subjects by administering a treadmill test(initial speed: 90m/min, grade: 5%, increasing speed per 3 min: 30m/min). Serum lipid(T-C, TG, HDL-C LDL-C) and hormones(epinephrine, norepinephrine, growth hormones, cortisol) were assayed pre and post detraining in 10, 20, 30 days after retraining. The repeated ANOVA was used to determine significant differences. The 0.05 level of significance was as critical level for the study. The results of the study were as follows: 1. V˙O_2max(ml/min) were 3576.3±204.2ml/min pre detraining, 3234.1±198.9 ml/min post detraining. There are significant(p<.05) difference between pre and post detraining. In 10, 20, 30 days after retraining, V˙O_2max(ml/min) were 3601.4±170.9 ml/min. There were significantly(p<.05) increased in retraining periods. 2. V˙O_2max(ml/kg/min) were significantly(p<.05) decreased from 62.3±2.9 ml/kg/min to 55.9±4.7 ml/kg/min in detraining. In 10, 20, 30 days after retraining, V˙O_2max(ml/kg/min) were 62.4±3.4ml/kg/min, 62.7±2.3ml.kg/min, 67.3±7.2ml/kg/min respectively. There were significantly(p<.05) increased in retraining periods. 3. T-C were significantly (p<.05) increased from 166.6±8.5mg/dl to 175.3±10.3 mg/dl in detraining. In 10, 20, 30 days after retraining, T-C were 160.1± 3.2mg/dl, 156.7±3.7mg/dl, 140.3±9.0mg/dl. There were significantly(p<.05) decreased in retraining periods. 4. HDL-C were 61.4±6.6mg/di pre detraining, 5.3±6.6mg/dl post detraining. There are significant(p<.05) difference between pre and post detraining. In 10, 20, 30 days after retraining, HDL-C were 56.9±7.1mg/dl, 56.4±9.2mg/dl, 57.7±9.1mg/dl respectively. There were no significant difference in retraining periods. 5. The hormones(epinephrine. norepinephrine, growth hormone, cortisol) were changed as same patterns. Epinephrine were 26.0±7.0[g/ml pre detraining, 24.6±3.2pg/ml post detraining. In 10, 20, 30 days after retraining, epinephrine were 26.9±5.6pg/ml, 30.6±6.2pg/ml, 29.4±5.6pg/ml respectively. There were no significant difference in retraining periods. In conclusion, HDL-C, epinephrine, norepinephrine, growth hormone and cortisol were decreased, T-C, LDL-C and TG were increased in detraining. But HDL-C, epinephrine, norepinephrine, growth hormone and cortisol were increased, T-C, LDL-C and TG were decreased in retraining.

      • Nanogenerators: Fully Rollable Transparent Nanogenerators Based on Graphene Electrodes (Adv. Mater. 19/2010)

        Choi, Dukhyun,Choi, Min-Yeol,Choi, Won Mook,Shin, Hyeon-Jin,Park, Hyun-Kyu,Seo, Ju-Seok,Park, Jongbong,Yoon, Seon-Mi,Chae, Seung Jin,Lee, Young Hee,Kim, Sang-Woo,Choi, Jae-Young,Lee, Sang Yoon,Kim, Jo WILEY-VCH Verlag 2010 ADVANCED MATERIALS Vol.22 No.19

        <B>Graphic Abstract</B> <P>The cover shows an image of fully rollable transparent nanogenerators synthesized using chemical vapor deposition grown large-scale graphene sheets as transparent electrodes and piezoelectric ZnO nanorod arrays. Sang-Woo Kim, Jae-Young Choi, and co-workers report on p. 2187 the electrical and structural stability of the nanogenerators, with excellent charge scavenging performance under external mechanical loads such as bending and rolling. This study shows that graphene-based nanogenerators are very promising for self-powered rollable transparent device applications. <img src='wiley_img_2010/09359648-2010-22-19-ADMA201090066-content.gif' alt='wiley_img_2010/09359648-2010-22-19-ADMA201090066-content'> </P>

      • KCI등재
      • 진동수가 큰 모드데이터를 이용한 트러스 구조물의 시스템 식별 및 손상추정

        尹鍾烈,金成鉉 弘益大學校 科學技術硏究所 2001 科學技術硏究論文集 Vol.12 No.-

        A method for identifying the element properties of a truss structure is developed. In the study, the measured natural frequencies and modal shapes of the truss are used. The equation error including unknown parameter is constructed from the dynamic model. To analyze the inverse problem, the least square method is used. The inverse problem model is then formulated as a linear simultaneous equation and unknown parameters are estimated without complex iteration processes. Since it is difficult to obtain all modal data of a structure, the estimation of unknown parameters using limited modal data is studied. In selection of modal data, high modal data which is sensitive to the variation of parameters are selected. Through the suggested method, accurate parameters and damage of a truss structure are identified and detected.

      • 공간고조파해석법을 이용한 영구자석 선형 동기전동기의 특성해석

        尹相伯,洪正杓,玄東石,鄭因城 창원대학교 공작기계기술연구센터 1999 연구업적집 Vol.1 No.1

        This paper presents a two dimensional analytical method of a permanent Magnet Linear Synchronous Motor(PMLSM) based on the concept of space harmonic The air gap flux densities due to permanent magnets and primary current are calculated separately, and the resultant air gap flux density is obtained by superposition of those, Maxwell's stress tensor is used to calculate thrust and normal force. The static thrutst and normal force according to exciting current and power angle are calculated, and the harmonics of the thrust are analyzed using discrete Fourier transform In order to verify the validity of the proposed analytical method, we make a test facility and compare the analysis results with the experimental ones.

      • KCI등재

        동양문고본 만언사 연구 : 세책 유통의 정황과 작품 내적 특징을 주로 하여 mainly about the conditions of circulation of rental books and internal characteristics of the work

        윤성현 洌上古典硏究會 2005 열상고전연구 Vol.21 No.-

        <만언사>는 세책으로 유통된 시가로서 작품의 얼개 자체가 이에 유리한 여건을 갖추고 있다. 현재 전하는 10종의 이본 가운데 동양문고본은 이를 텍스트 자체로 증명하고 있다. 동양문고본 <만언사>는 1899년 1월 향수동 세책점에서 두 권으로 필사되었다. 표제는 '萬言詞'이고, '만언사'와 'ㅅㆍ부모'·'ㅅㆍㅂㆍㅣㄱ부'·'ㅅㆍ쳐'·'ㅅㆍ자', 그리고 만언답셔'의 순으로 짜여 있다. 4음보 1행을 기준으로 전체 998행 분량이며, 끝에 간단한 후기가 붙어 있다. <만언사>는 정조 때 대전별감 안조원이 죄를 얻고 추자도에 귀양 가 지은 유배가사이다. 배고픔과 추위, 섬 주민의 구박과 모멸감 등을 가감 없이 그려내었다. '만언사'의 앞부분 출생과 성장 및 '만언답사'에는 사대부 취향의 관념적인 언설이 엿보이지만, '만언사' 뒷부분 유배지에서의 삶에서는 작가의 궁상을 숨김없이 드러냄으로써 서민문학적 성격에 접근하였다. 작가는 독자와의 소통을 위해 애쓴 바, <만언사>는 당대 문학지식의 보물창고 구실을 맡기도 하였다. 우선 중국의 고대민요를 비롯 서序·부賦·사辭·시詩 등과 우리의 궁중악장과 시조·사설시조·가창가사 등의 고전을 작품 곳곳에 배치하였다. 또한 익숙한 전고의 차용으로 작품 몰입을 도와주었으며. 다양한 수사기법을 통해 작품에 윤기를 더해주었다. 내용상 당대의 정치 및 사회 현실에 대한 비판이 다소 약하지만, 이전까지 양반작가 일변도의 유배문학에 새로운 기운을 불어넣은 공이 있다. <만언사>는 이런 강점들을 작품 내에서 최대한 융화시켜 세책으로 성공할 수 있었다. The anthology Maneonsa was circulated as the rental book and its framework satisfied itself advantageous terms. It is proved through Dongyangmungo edition itself among other 10 existing different versions. The Dongyangmungo edition Maneonsa is transcribed for two volumes at a rental book store of Hyangsudong in January 1899. Its title is Maneonsa, and it is organized in the order of 'Maneonsa(萬言詞)', 'Sabumo(思父母)', 'Sabaekbu(思伯父)', 'Sacheo(思妻)', 'Saja(思子)', and 'Maneondapseo(萬言答書)'. On the standard of 4 rhythm-foot by 1 verse, it consists of 998 verse and is appended to a brief postscript in the last part. Maneonsa is one of the Exile-Gasas(流配歌辭) written by a deportee An Jo-Won, who was condemned to exile to Chujado due to the mistake made when he was Daejunbyeolgam(大殿別監) in the period of king Jeongjo(正祖). He described the poverty, the cold, dwellers' maltreatments and the feeling of disdain. In the first part of Maneonsa with birth and growth and Mahnundapsa, we can see the idea of the intellectuals. But in the later part of Maneonsa with the period of exile, we can find out that he showed his distressed conditions frankly and comes close the character of the common people's literature. Because the author tried to communicate with the readers, Maneonsa had taken charge of a treasure house of literary knowledge in its age. First of all, the author used ancient Chinese folk songs, Seo(序)·Bu(賦)·Sa(辭)·Si(詩), and Korean Akjang(樂章) of the Royal Court, and Sijo(時調) Saseolsijo(辭說時調) Gachanggasa(歌唱歌辭), etc. in the work. Moreover, he made the work more understandable by citing the classics of the Orient and more abundant by a various rhetorical device, Even the contents of the work slightly criticize the reality of society and politics: it is different from other intellectual class's Exile literatures. Maneonsa was successful as a rental hook by harmonizing these good points.

      • SCOPUSSCIEKCI등재

        하악전돌증의 악교정수술 후 연조직 형태변화에 대한 연구

        성상진,박현도,김재승,문윤식 대한치과교정학회 2000 대한치과교정학회지 Vol.30 No.3

        악교정수술에 관한 치료계획은 치료결과에 관한 정확한 예측을 바탕으로 수립되는 것이 바람직하며 이는 심미적인 결과를 얻기 위한 가장 중요한 요소 중에 하나이다. 성인에서 골격성 하악전돌증의 치료는 하악골후퇴술을 이용한 악교정수술법이 주로 이용되는데, 술후 턱끝의 돌출도가 과도하게 감소되어 하악전진이부성형술을 추가로 시행해야 하는 경우 하악골과 턱 부위의 연조직 변화방향이 상이하게 나타나므로 술후 연조직 변화를 정확히 예측하는데 한계가 있다. 본 연구에서는 골격성 하악전돌증을 주소로 악교정수술을 시행한 성인을 대상으로, 상행지시상분할골절단술(BSSRO)만을 시행한 경우(A군) 11명과 하악전진이부성형술(advancement genioplasty)도 같이 시행한 경우(B군) 9명의 경조직과 연조직 변화의 상관관계를 알아보기 위하여, 수술 8개월 이후에 채득된 측모두부계측방사선사진을 비교하여 다음과 같은 결과를 얻었다. 1. E-line에 대하여 상순은 더 돌출되고 하순은 더 후퇴되어 입술의 형태가 개선되었으며,하악전진이부성형술을 병행한 경우 하순의 돌출도는 더 개선되었다. 2. 두 군 모두에서 상순은 후방이동하고 비순각은 증가하였다. 3. 술후 B점에 대한 연조직 POGs점의 변화율은 A군에서 84%, B군에서 66%로 나타났으며 두 군간에 통계적 유의성이 있었다. 4. 경조직과 계측점의 수직변화량은 A군에서 감소하였다. The treatment plan for orthognathic surgery must be based on accurate predictions, and this can be produced the most esthetic results. Treatment of prognathic mandible in adult is usually orthognathic surgery using mandible set back, but mandible with retruded chin point is needed additional chin augmentation. In this case, the directions between mandible and chin point are different therefore, the prediction of soft tissue reactions must be modified. In this study, we materialize the patients who was taken orthognathic surgery due to prognathic mandible, 11each(Group A) was taken only Bilateral Sagittal Sprit Ramus Osteotomy (BSSRO), 9each(Group B) was taken additional advancement genioplasty. The lateral cephalometric radiography taken 8 months later after orthognathic surgery by this patients were used. The results of this study were as follows : 1.The profile of lips was favorable after surgery due to upper lip to E-line became prominent and lower lip to E-line was retruded. 2.In both group, upper lip moved posteriorly and nasolabial angle was increased. 3.The ratio of the soft tissue profile change in POGs point to skeletal B point movement was 84% in group A and 66% in group B, and there was statistical significance between group A and group B. 4.Vertical movement of hard tissue points is decreased in group A.

      • 주행속도에 따른 부상마그네트의 특성을 고려한 상전도 자기부상시스템의 부상제어에 관한 연구

        玄東石,洪正杓,鄭因城,許眞,尹相伯 창원대학교 공작기계기술연구센터 1999 연구업적집 Vol.1 No.1

        A collective controller for electromagnetic suspension (EMS) system considering the speed characteristics of electromagnets is presented. The speed characteristics of the electromagnet are analyzed by finite element method (FEM) and Neural Network algorithm is used for the controller considering speed. The proposed controller is examined and the dynamic characteristics are compared with those of other controllers. The simulation results show that proposed controller has a better performance at high speed.

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