유한요소법에 의한 골강도와 micro-CT 지표 및 골밀도간의 상관관계

윤영남,이완,이병도 대한구강악안면방사선학회 2007 Imaging Science in Dentistry Vol.36 No.1

Purpose : Bone mineral density (BMD) and bone microarchitecture are important determinants for bone strength. Recently micro-CT have provided possibilities for measuring a variety of structural indices to characterize bone microarchitecture. The objective of this study was to compare the BMD and micro-CT parameters with Young's modulus calculated by finite element analysis(FEA) for the evaluation of bone strength. Materials and Methods : Bone specimens were obtained from the 18 female rabbits aged 16 weeks. Of those, 36 samples (right and left femur) were selected for 3D micro-CT analysis (ANT^(TM), SKYSCAN, Belgium) and BMD by PIXImus 2 (GE Lunar Co. USA). Five microstructural parameters of micro-CT, such as trabecular thickness (Tb.Th), bone specific surface (BS/BV), percent bone volume (BV/TV), structure model index (SMI) and degree of anisotropy (DOA) were studied. Young's modulus was obtained by software program (ANSYS 9.0, ANSYS Inc, Canonsburg, PA) based on micro-CT three dimensional images. Results : Young's modulus assessed by FEA correlated significantly with Tb.Th, BV/TV, BS/BV and SMI respectively. Young's modulus showed higher correlation with these microstructural parameters of micro-CT than BMD. Microstructural parameters except DOA showed significant correlations within the examined group. Conclusion : The microarchitectural parameters of micro-CT and BMD represented some informations in the evaluation of bone strength assessed by FEA. (Korean J Oral Maxillofac Radiol 2007; 37: 53-9)

현행 중등학교 과학 실험 , 실습 교육 실태 조사 및 그 운영 진단 (Ⅱ) : 고등학교 과학 실험 , 실습 교육을 중심으로

김영호,이윤종,정원우,강용희,양승영,윤성효,안병호,윤일희,권용주,임성규,오철한,기우항,전명남,김중욱 한국과학교육학회 1998 한국과학교육학회지 Vol.18 No.3

본 연구는 96년도에 실시한 우리 나라 중학교 과학 실험·실습 교육의 실태 조사 연구에 따른 계속 연구의 일환으로 고등학교 과학 실험·실습 교육의 실태를 조사하기 위한 것이다. 연구내용은 고등학교 과학 교과서의 분석, 실험·실습 실시 현황 분석, 현행 실험·실습 교육의 문제점 분석, 현행 학교 구성원들의 실험·실습 교육 운영 실태 조사 및 현행 실험·실습 교육의 개선을 위한 연구과제 도출을 주요 연구내용으로 다루었다. 연구방법은 전국의 고등학교 80개교를 대상으로 이들 학교의 학생 1,977명, 교사 165명, 학교장 80명에게 적용하였다. 본 연구에서 밝혀진 결과를 중심으로 우리 나라 고등학교 과학 실험 실습 교육의 정상화를 위한 실험 내적인 연구과제를 제시하면 다음과 같다. (1)교재 개발에 대한 연구, (2)실험 킷트 개발에 대한 연구, (3)교사교육 및 재교육 프로그램 개발에 대한 연구, (4)교실 밖 실험·실습 활동 프로그램 개발에 대한 연구, (5)과학 실험·실습 소재의 개발에 대한 연구. This study was accomplished to analysis and survey on the experimental and practical science education of high school in korea for the consecutive study of the an analysis and survey on the experimental and practical science education of middle school in korea(Lee, Yoon-Jong et al., 1997). The status of facilities, management for the experiment, practices, teaching methods in high schools have been investigated. The present status and reasonable management of the high school science education have been grasped from the questionaires. To do this 165 high school science teachers, 1977 students and 80 principals of high schools in Korea are administered questionaires of Science Education Research Institute of Kyungpook National University(1997). The results of this study are as follows : The reasonable management for experiments and practices of science education were scanty in the high school around the urban and rural school owing to the shortage of facilities and equipments, crowded class, excessive class works for teacher, excessive contents of present textbooks and insufficiency of the administrative supports etc. The current teaching method of high school science has emphasized knowledge. This fact does not satisfy the objective of learning due to lack of the teaching method. Desirable directions for the improvement of present status of high school science education were proposed in this paper.

유성견에서 교정적 치아이동에 따른 치주조직 변화에 관한 연구

강남용,윤영주,김광원 대한치과교정학회 1997 대한치과교정학회지 Vol.27 No.4

교정력에 의한 치주조직의 변화를 알아보기 위해 성장중인 유성견에서 단기간의 교정력이 가해진 직후와 보정기간 동안 일어나는 치아와 골조직의 변화양상을 조직학적으로 관찰하였다. 본 연구에서는 생후 4-6개월된 유성견 3마리를 이용하여, 각 실험동물의 하악 좌측 견치와 제1대구치는 실험군으로, 우측 견치와 제1대구치는 대조군으로 하였다. 하악견치와 제1대구치에 치관사이에서 최초 교정력이 200mg이 되도록 0.018"X0.022" S.S closed coil spring(Dentarum Co)의 길이를 조절하여 치아에 결찰시키고 장치는 1주간 활성화기간을 갖는 후 14일, 28일의 보정기간을 거쳐 희생시켜 하악골을 절제하여 통법에 따라 H-E염색군, 연마표본군, ALP염색군, TRAP염색군등으로 나누어 염색을 시행하여 다음과 같은 결과를 얻었다. 1. 교정력을 종료한 직후 견인측 치주인대 폭경이 대조군보다 더 증가된 상을 보이고, 반대로 압박측은 폭경이 감소된 소견을 보이며 치주인대의 섬유들이 치축에 수직으로 압축되며 초자양 변성이 관찰되었다. 대조군에서 관찰되는 다수의 규칙적인 배열을 보였던 조골세포가 견인측에서는 간혹 관찰되었다. 2. 교정력 종료후 14일 보정기간 경과군 치주인대내 섬유아세포들이 증식되어 초자지질대가 회복되는 소견이 관찰되었고 견인측 치주인대의 폭경이 교정력을 종료한 직후군보다 감소하였으며, 소수의 ALP(+) 조골세포와 함께 신생골형성도 관찰되었다. 압박측 치주인대의 폭경은 교정력을 종료한 직후군보다 다소 증가하였으며 골흡수도 증가되었다. 3. 교정력 종료후 28일 보정기간 경과군 치주인대섬유는 정상적으로 회복되어 대조군과 유사한 양상을 보였고 견인측 치조골내 다수의 ALP(+)조골세포와 활발한 신생골형성이 관찰됨과 더불어 압박측 치조골은 다수의 TRAP(+)파골세포와 왕성한 골흡수양상을 보였다. 이상의 결과를 종합해 볼때 교정력을 7일간 가한 직후 유리질화가 관찰되었고 교정력을 종료후 28일 보정기간 경과군에서 압박측에서는 파골세포 견인측에서는 조골세포의 활성과 함께 각각에서 왕성한 골 흡수와 신생골형성이 관찰됨을 알 수 있다. For orthodontic tooth movement, optimal orthodontic force should be maintained without periodontal breakdown and alveolar bone should be remodeled physiologically. Therefore, To obtain proper occlusion through tooth movement within alveolar bone, we should know the biomechanics of teeth and supporting tissues. The present study was performed to observe histologic changes of periodontal tissue immediately after application of orthodontic force and during the retention period in growing young adult dogs. In this study, of same animal. The 0.18"X0.22" stainless steel closed coil spring(Dentaurum Co.) was ligated on the experimental teeth at initial 200gm-force from mandibular canine to 1st molar. The animals(4 to 6 months aged young adult dogs)were sacrificed on 0, 14, 28 days after the finish of appliance activation, and the tissue samples were divided into himatoxylin-eosin(HE) staining section, groud section, alkaline phosphatase(ALP) staining section, and tartrate-resistant acid phosphatase(TRAP) staining section. Thereafter, the proparations were examined under light microscopy. The following results were obtained: 1. Immediately after the finish of appliance activation, the periodontal space was increased in tension side, but decreased in pressure side compared to that of control. The hyalinized zone was also observed in the periodontium. 2. After the 14-day retention, peridontal space was decreased in tension side ans slightly increased in pressure side compared to that of immediately after the finish of appliance activation. The hyalinized zone was repaired and a few osteoblasts showing slightly new bone formation were seen. Osteoblasts were scarcely observed along the alveolar bone. 3. After the 28-day retention, peridontal fibers are normally repaired. A lot of TRAP(+) osteoclasts and increased alveolar bone resorption were observed in pressure side, and AP(+) osteoblast and increased new bone formation were observed in tension side.

유한요소법에 의한 골강도와 micro-CT 지표 및 골밀도간의 상관관계

윤영남,이완,이병도,Yoon, Young-Nam,Lee, Wan,Lee, Byung-Do 대한영상치의학회 2007 Imaging Science in Dentistry Vol.37 No.1

Purpose : Bone mineral density (BMD) and bone microarchitecture are important determinants for bone strength. Recently micro-CT have provided possibilities for measuring a variety of structural indices to characterize bone microarchitecture. The objective of this study was to compare the BMD and micro-CT parameters with Young's modulus calculated by finite element analysis (FEA) for the evaluation of bone strength. Materials and Methods Bone specimens were obtained from the 18 female rabbits aged 16 weeks. Of those, 36 samples (right and left femur) were selected for 3D micro-CT analysis $(ANT^{TM},\;SKYSCAN,\;Belgium)$ and BMD by PIXlmus 2 (GE Lunar Co. USA). Five microstructural parameters of micro-CT, such as trabecular thickness (Tb.Th), bone specific surface (BS/BV), percent bone volume (BV/TV), structure model index (SMI) and degree of anisotropy (DOA) were studied. Young's modulus was obtained by software program (ANSYS 9.0, ANSYS Inc, Canonsburg, PA) based on micro-CT three dimensional images. Results : Young's modulus assessed by FEA correlated significantly with Tb.Th, BV/TV, BS/BV and SMI respectively. Young's modulus showed higher correlation with these rnicrostructural parameters of micro-CT than BMD. Microstructural parameters except DOA showed significant correlations within the examined group. Conclusion The microarchitectural parameters o( micro-CT and BMD represented some informations in the evaluation of bone strength assessed by FEA.

한국인 인슐린 비의존형 당뇨병 및 이차성 당뇨병 환자에서 글루코키나제 유전자 변이

남재현(Jae Hyun Nam),이현철(Hyun Chul Lee),김연의(Youn Euy Kim),권석호(Suk Ho Kwon),윤용석(Yong Suk Yoon),박석원(Suk Won Park),원영준(Young Jun Won),차봉수(Bong Su Cha),송영득(Young Duk Song),이은직(Eun Jig Lee),임승길(Sung Kil Lim) 대한내과학회 1998 대한내과학회지 Vol.54 No.6

N/A Objectives: Mutations in the glucokinase (GCK) gene are considered a possible cause of maturity-onset diabetes of the young. The purpose of this study was to evaluate the contribution of this gene to the development of non insulin dependent diabetes mellitus (NIDDM), gestational diabetes mellitus (GDM) and post-renal transplantation diabetes mellitus (PTDM). Method: Identification of GCK mutation was attempted on 39 NIDDM patients, 2 GDM patients and 58 selected renal allograft recipients with PTDM and 45 normal controls. The exons in the GCK gene were examined by polymerase chain reaction (PCR), followed by analysis of single-stranded DNA conformational polymorphism (SSCP). The abnormal bands were also confirmed by DNA sequencing analysis. The exons of affected family members were also investigated for mutations of the GCK gene. Results: Two of the 58 PTDM patients (3.4%) were found to have CKK mutations. One had the mutation on exon 5 and the other on intron 7. One control subject had the mutation on intmn 9. The mutation of exon 5 was identified as a substitution of CCT (proline) for CTT (leucine) at codon 164, which has not ever reported before. The family members of the PFDM patient with mutation of exon 5 were analyzed by PCR followed by SSCP, and two of them revealed the same mutation. The abnormal band on the SSCP analysis of exon 7 was identified as the insertion of base C/T at the 39th nucleotide in intron 7. Two family members of this patients also had same band on SSCP. The one mutation of 45 normal controls was CT located at the 8th nucleotide in intron 9, which was a common polymorphism. Conclusion: We found GCK mutations in subjects with PTDM and we speculate that these mutations may be one of the contributing cause of PTDM.

인터넷 중독 청소년의 자존감, 우울, 충동성과 사회관계

윤혜미(Hye Mee Yoon),남영옥(Young Ok Nam) 충북대학교 생활과학연구소 2009 생활과학연구논총 Vol.13 No.1

Over the last decade, there has been increased interest in the addictive potential of the Internet, and past studies have indicated that the addictive pattern of Internet use are associated with some psycho-social traits of the users and adolescents and young adults are especially vulnerable population. This study investigated the extent to which psycho-social factors were related to the extent of Internet usage among adolescents and to examine the potential influences of self-esteem, depression and impulsiveness on social relations of the adolescents with Internet addiction. A total of 2,495 adolescents ages between 15-17 responded to the questionnaire, which included Young's IAT, Rosenberg's Self-esteem instrument, Beck's BDI, BISII, Hudson's IFR and IPR. Results showed that 61.0% of the sample were considered Internet addicted(4.0% seriously pathological, 57.0% moderate), who suffer from higher level of depression, impulsiveness, and problems of social relations and low self-esteem than their peers. Regression analysis indicated that problems in social relations among adolescents with Internet addiction were predicted by low self-esteem and depression. No link was found between impulsiveness and social relations. Results suggest that preventive efforts for Internet addiction of adolescents are in imminent needs. Implications to help professionals are addressed.

1998년도 신입생 실태조사 연구

윤영식,남근숙 순천대학 학생생활연구소 1998 學生生活硏究 Vol.17 No.-

시대적 배경을 통해 본 마을 숲의 변천과 보존 : 성남리 성황림 지역을 대상으로

남연화,윤영활 한국정원학회 2002 한국전통조경학회지 Vol.20 No.2

In recent days, the historical and cultural resources of agricultural villages have been destroyed and disappeared by reckless developments. The purpose of this research is to help administrations to establish the good policy about forests by investigating the changing process and preservation condition of the woods that embraces the continuous life of villagers. It is limited to the Seong-Whang-Lim in Wonju-city. People of the village hold this forests sacred and call it Sin-Lim. In the light of humanistic societies and physical environment, its history , conservation policy, regulation, the area and configuration of the ground, food life, facilities, and dwelling environment were perodically survryed and analyzed in connection to forest. In result the restriction and protection policy as institution caused the preservation of the forest. They hepled to maintain original forest, if the area of the forest has been decreased after the colonial period of Japan. And the closure treatment of the road in the forest resulted in the separation of space between the trees of level round and the trees of the slope and the policy of afforestation caused the destruction of a traditional plant-life, by being planted foreign trees. Finally the forest was reduced and damaged, it is necessary for us to take measures systematically because broad-leaved trees of the temperature zone provide us historical and cultural space.

태권도 훈련이 아동의 성격 및 사회성에 미치는 영향

윤오남,서영환 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.3

This study is designed to identify what effect the Taekwondo practice of elementary school students has on development of their personality. For the purpose of this study, elementary school students who now live in province were selected from six elementary schools and 18 Taekwondo places at random. Targets were 30 non- trainers from the six elementary schools and 360 trainers by selecting 10 trainers per Taekwondo place. Questionnaires were given to 327 students among selected 360 students. The responses of 300 students were used for an actual analysis Any questionnaires that were not completed or the response of which it was judged was not sincere were excluded from the analysis. To identify what effect the Taekwondo training of elementary school students has on development of personality, general nature of elementary school students, background of training, their attitudes at school, their social, emotional, and living aspects were studied and the results are as follows : First, the Taekwondo training of elementary school students has an effect on development in their attischool. Second, the Taekwondo training of elementary school students has an effect on development in their emotional aspect. Third, the Taekwondo training of elementary school students has an ffect on their social students has an effect on their social development.. Fourth, the Taekwondo training of elementary

컴퓨터 赤外線 全身體熱撮影과 FNT을 통해 살펴본 Bell's palsy에 대한 침치료의 臨床的 考察

尹敏永,趙恩嬉,許泰永,趙南根,文炯喆 한국전통의학연구소 2001 한국전통의학지 Vol.11 No.1

Object : This study is designed to evaluate the clinical therapy of acupuncture by the data of DITI(Digital Infrared Thermographic Imaging) and FNT(Facial Nerve stimulation Test) examination and the changes of clinical symptoms after the therapy of acupuncture in the patients with Bell's palsy. Contents : The conservative therapy with acupuncture was performed during 1-8weeks. The acupuncture points of S4, S6, G14, S2, BL2, SI18, TE23, LI4 and S36 were used. In the pre- and post therapy, DITI examinations was performed in patients who had Bell's palsy and were treated by acupuncture, and then tried to correlate the results of clinical symptoms with the difference of thermographic findings. And FNT examinations were performed in the same patients above, and then tried to correlate the results of clinical symptoms with the difference of nerve response findings. Setting : The standard routine thermographic examination with thermography (DITI) and nerve response with FNT(Facial Nerve Stimulation Test) were performed in the 16 patients with Bell's palsy at pre- and post acupuncture. Patients : Thermographic imaging of 16cases was analyzed. They had diagnosed Bell's palsy. They were treated by acupuncture and moxibustion therapy in Wonkwang Oriental Hospital from Jauary, 1999 to February, 2000. Results : 1) The results of treatment showes that 56.25% of patients achieved clinical excellent recovery and 31.25% achieved good recovery. After compairing the DITI results before and after treatment, we found 43.75% of patients achieved excellent recovery and 43.75% achieved good recovery. 2) After compairing the FNT results before and after treatment, we found 25% of patients achieved excellent recovery and 56.25% achieved good recovery. Conclusion : 1) Acupuncture showed good results over 87.5% in clinical evaluation and 87.5% in DITI. Thermographic examination showes terapeutic effect of acupuncture treatment. 2) Acupuncture showed good results over 87.5% in clinical evaluation and 81.25% in FNT. FNT showes nerve response recovery effect of acupuncture treatment.