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황창환(Chang Hwan Hwang),백승욱(Seung Wook Baek),한조영(Cho Young Han),김수겸(Su Kyum Kim),전형열(Hyung Yeol Jeon) 한국연소학회 2012 KOSCOSYMPOSIUM논문집 Vol.- No.45
The droplet behavior of 83.9 wt.% HAN water solution was investigated experimentally with various ambient temperature and nitrogen environment. At the initial stage of evaporation under thermal decomposition temperature of HAN, gradual decreasing of droplet diameter was observed. After that, the droplet started to expand due to the internal pressure build up by water nucleation inside the droplet. The micro explosion was observed at higher temperature than the decomposition temperature of HAN and the remaining droplet showed similar behavior of single composition droplet. The decreasing rate was augmented as the ambient temperature increasing.
야뇨증 환아들의 심리사회적 특성에 대한 다기관 연구 : 행동 및 정서 문제를 중심으로
조수철,김재원,신민섭,황준원,한상원,박관현,이상돈,김경도,김건석,서홍진,이유식,정재용,김영균,문두건,남궁미경,한창희,조원열,김영식,배기수,이종국,정우영,신의진 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.6
Objectives : The aim of this study was to examine the behavioral and emotional problems associated with nocturnal enuresis in Korean children. Methods : Three hundred eighteen children with nocturnal enuresis, together with their parents, completed the Child Behavior Checklist (CBCL), Disruptive Behavior Disorder Scale according to DSM-IV (DBDS), Children's Depression Inventory (CDI), State-Trait Anxiety Inventory for Children (STAIC), and Piers-Harris Children's Self-Concept Scale (PHCSC). Ninety-three normal students were selected as the control group. Results : Compared to the normal control group, the mean scores with regard to the withdrawn, social problems, attention problems, delinquent behavior, aggressive behavior, externalizing problems and total problems profiles were significantly higher in the nocturnal enuresis group according to the CBCL results. The nocturnal enuresis group also scored significantly higher in the ADHD and ODD profiles of the DBDS. The nocturnal enuresis group was more depressed and anxious than the control group according to the results of the CDI and STAI. The mean score of the PHCSC was significantly lower in the nocturnal enuresis group when compared to the normal control group. Conclusion : The results of this study suggest that children with nocturnal enuresis in Korea have clinically relevant behavioral and emotional problems. The findings support the link between nocturnal enuresis and psychopathology in Korean children.
노인의 팔 굽힘/폄 저항 운동 시 하중 증가에 따른 근육의 활성도 및 기여도 분석
김현동(Hyun Dong Kim),황성재(Sungjae Hwang),손종상(Jongsang Son),김한성(Han Sung Kim),김영호(Young Ho Kim) 대한인간공학회 2009 大韓人間工學會誌 Vol.28 No.4
The purpose of this study was to assess activation and contribution of muscles of the elderly according to increased loading during the arm flexion extension resistance exercise. Surface electromyographic signals were acquired from biceps brachii, triceps brachii, deltoid posterior, pectoralis major and latissimmus dorsi to determine the difference of the activation of specific muscles between the elderly and young. Five elderly and five young males with no musculoskeletal disease volunteered for the study. Electromyographic activities in the muscles were measured during resistance exercise and normalized to the maximum EMG activity recorded in the maximal voluntary static contraction (MVC). Against the increased loading during arm flexion/extension resistance exercises, the young uses muscles evenly but the elderly uses one specific muscle frequently. Contribution of triceps brachii during extension and deltoid posterior during flexion was principal in the elderly.
서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)
김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1
In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.
재료의 흡수상태에 따른 콘크리트의 물리적 변화에 관한 기초적 연구
한다희,황병준,박희곤,이영도,정상진 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)
Most concrete is recently made of an aggregate which is properly absorbed, and carried in it in order to do capability at every fields. We have been close to demand new capability of high flowing and enduring for specific concretes. That is difficult to cope with claiming the efficiency on deterioration from lack of a high quality aggregate. Therefore, For solving the problems we apply to a packing method for using dried materials. That is to say it is a kind of making into an instant. In this study, There is a purpose to present fundamental data, comparing and analyzing a phenomenon about aggregate's absorption following the rate of adding water, for using existing materials.
치은연하 파절로 치조골 소실을 동반한 상악측절치에서 orthodontic extrusive remodeling후 임플란트 식립을 통한 심미수복 : 증례보고
황수연,손원준,한영철,배광식,백승호,이우철,금기연 大韓齒科保存學會 2008 Restorative Dentistry & Endodontics Vol.33 No.1
심미적으로 중요한 전치부에서 단일 치아 임플란트를 이용한 보철수복은 임상의에게 새로운 도전과제 중의 하나가 되었다. 그러나 전치부에서 single-unit implant는 식립할 부위의 치조골 상태가 양호해야 하는데 치은연하 파절로 인해 치아 주위에 골 손실이 있는 경우 immediate implant는 심미적으로 문제를 야기할 수 있다. 따라서 본 증례는 "orthodontic extrusive remodeling"을 통해 파절치와 주위 조직을 교정적으로 정출시켜 임플란트 식립을 위한 연조직과 경조직을 증대시킨 후 임플란트 식립을 통해 상악측절치에서 성공적인 심미수복을 이룬 증례에 관한 것이다. The treatment of esthetic areas with single-tooth implants represents a new challenge for the clinician. In 1993, a modification of the forced eruption technique, called "orthodontic extrusive remodelling" was proposed as a way to augment both soft- and hard-tissue profiles at potential implant sites. This case report describes augmentation of the coronal soft and hard tissues around a fractured maxillary lateral incisor associated with alveolar bone loss, which was achieved by forced orthodontic extrusion before implant placement. Through these procedures we could reconstruct esthetics and function in a hopeless tooth diagnosed with subgingival root fracture by trauma.
카드뮴에 의해 유발된 흰쥐 고환의 미세구조 및 단백질 변화
황일면,한승로,정옥,김수일,이영호,김원식 충남대학교 의과대학 지역사회의학연구소 2000 충남의대잡지 Vol.27 No.2
Although cadmium is a well known heavy metal which attacks testis and results male infertility, the mechanism of action in the testis is'nt still fully known. In the previous experiment, authors observed morphological changes in the testis, and found cadmium-induced death of all the spermatogenic cells and hemorrhagic necrosis within the seminiferous tubules, and apoptosis and death of interstitial cells and fibroblasts in the interstitial tissue of the testis. In this experiment, cadmium chloride (4 mg/kg of body weight) administered to the adult male rats(Sprague-Dawlcy) intraperitoneally and sacrificed 1 week after treatment. And electrophoresis, immunoprecipitation and Western blotting, and N-terminal analysis were performed to find the proteins changed after cadmium treatment in the testis. And the results were as follows; 1. Two proteins of molecular weight 42kDa and 21kDa disappeared after cadmium treatment. 2. The protein of 2lkDa was rat collagen type I alpha 2. According to the above results, it was considered that cadmium degraded the collagen fibers within the wall of small blood vessels in seminiferous tubules and interstitial tissues and disrupted vascular walls, which resulted hemorrhagic necrosis, death of all the spermatogenic cells, and the death of interstitial cells and fibroblastic cells.
황용길,윤한중 東亞大學校 1998 東亞論叢 Vol.35 No.-
The experimental results of synthesized expansive sttringites with aqueous solution of aluminumsulphate and milk of lime are as follows. 1) The synthesized reactions are progressed toward exothermic reaction rapidly. 2) Compared to crystallizing H₂O content of the synthesized 3Cao·Al₂O₃·3CaSO₄·xH₂O, diluted aqueous solutions is less than conc aqueous solution. 3) The crystal forms of synthetic ettringite are observed to spherical and column forms by SEM. 4) By the results of XRD analysis, ettringites contained below 6 mols CaO appeared to CaSO₄ but in the 7 and 8 mols CaO contained ettringites obtained CaSO₄and free CaO. 5) The expansibility and water absorption rate of 6 and 7 mols CaO contained ettringites are excellent.
한국과 호주의 스쿼시 경향과 향후 추세에 관한 비교 연구
한성유,황영성,박재성,허정석 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.1
This research is based on squash professionals opinion, precedent literature as well as other books and internet-researched information. In hopes that squash will not only become a more life-time sport, but a profession collegiate sport as well, and help change the publics recognition as an elite sport, and become an opportunity for professional literature and researches will recognize squash as a learning field: and in doing so, provide a compilation of strategic plans based on those of Australia to set a basic foundation. As a result of this research: 1. Financial independence must be acquired through more company sponsorship and T.V. broadcasting of squash games. 2. Municipal and provincial branch must become more autonomous through horizontal relationship. 3. A thorough reeducation course is needed to increase the quantity, but the quality of present Korean coaches and players. 4. Regulations and laws regarding the establishment of squash facilities must be drafted to avoid users from being exposed to danger through thoughtless governmental approval. If regulations and laws suitable for Korea conditions are created based on those of more advanced nations, then squash in Korea will continue on its path to further development.