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.

데스크탑 밀링머신의 고속 스핀들 설계 해석

장성현,황현영,정우영,홍정표,최영휴 한국공작기계학회 2009 한국공작기계학회 춘계학술대회논문집 Vol.2009 No.-

During a decade, there are many researches on microfactory which is the miniature, flexible, and efficient manufacturing system for the micro/meso scale machining device. Moreover many micro machine tool has developed in Japan, U.S., Europe, and Korea. Already we are developing a desktop milling machine with 380×450×450 ㎣ machine size for microfactory or BT (Bio technology) factory. In this study, we carried out the design analysis of a high speed spindle system for our desktop milling machine by using ADROS, which is our own developed S/W for dynamic design analysis of rotor systems. As the result, we obtained some analyzed dynamic characteristics of a spindle system, such as natural frequency, whirl frequency, critical speed, and harmonic response.

Increased 11β-hydroxysteroid dehydrogenase type 1 contributes to barrier dysfunction in aged skin

( Beom Jun Kim ),( Noo Ri Lee ),( Chung Hyeok Lee ),( Young Bin Lee ),( Solam Lee ),( Hyun Jee Hwang ),( Eunjung Kim ),( Eung Ho Choi ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.2

Background: 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1) converts inactive cortisone into cortisol, an active form, and is expressed by several tissues including the skin. Excessive active glucocorticoid (GC) deteriorates skin barrier function. Objectives: To find out if 11β-HSD1 affects on the barrier function in aged skin. Methods: We have performed human and in vivo studies. We measured cortisol in stratum corneum (SC) and oral epithelium of the elderly and young. Hairless mice were used for 11β-HSD1 immunohistochemistry staining of skin and measuring skin barrier function and serum cytokines. 11β-HSD1 knock-out (KO) mice and its wild-type were used for measuring lipid synthesis related enzyme. Results: Cortisol levels were elevated in SC and oral epithelium of the elderly rather than young. The 11β -HSD1 expression was increased in immunohistochemistry stain of aged mice skin. Aged mice showed decreased transepidermal water loss (TEWL) and SC hydration, and increased SC integrity than young. Serum inflammatory cytokines including interleukin-1α, -4, -10, -31 and tumor necrosis factor-α were increased in aged mice than young. The expressions of lipid synthesis related enzymes in epidermis were elevated in KO mice and topical 11β -HSD1 inhibitor applied mice. Conclusion: 11β-HSD1 expression is elevated in aged skin. It increases active GC and then deteriorates skin barrier function.

안정기 양극성 장애환자의 얼굴자극에 대한 주의력 유지과제에서의 결핍 특성

황성식,전덕인,조현상,김세주,박진영,전재영,석정호 大韓神經精神醫學會 2007 신경정신의학 Vol.46 No.3

Objectives : Euthymic patients with bipolar disorder have been reported to show deficits in sustained attention. This study aimed to compare the attention capacities of euthymic bipolar patients with those of control subjects using the sustained att-ention to response task (SART) and to examine the differences in the performance of SART related to the type of the stimulus. Methods : The four SART tasks were performed to measure attention capacities in 42 euthymic patients with bipolar dis-order and 28 control subjects. Happy, neutral, fearful faces and digit '3' were used as target stimuli in happy, neutral, fear and digit task conditions, respectively. The seventy of mood symptoms was assessed with 17-item Hamilton Rating Scale for De-pressive symptoms and Young Mania Rating Scale for manic symptoms. The efficiency estimate which reflects both the res-ponse accuracy and speed was used as the main outcome variable. Results : Bipolar patients showed significantly lower correct response rate than control group in all task conditions. Effi-ciency estimates of the bipolar patient group were significantly lower than those of the control group in the SART using facial stimuli, but not in the digit task condition. There was no significant difference in task performances related to the emotional categories of facial stimuli. Conclusion : Bipolar patients showed deficits in sustained attention even in the euthymic state. The attention deficits shownin the euthymic bipolar patients may be prominent in a more complex task condition with stimuli such as facial stimuli.

녹차분말을 첨가한 국수의 조리 특성에 관한 연구

현영희,황윤경,이윤신 동아시아식생활학회 2001 동아시아식생활학회지 Vol.11 No.4

This study was conducted to investigate the cooking properties of noodles made from composite flour blended with green tea powder. As the ratio of green tea powder increased, development time was longer than that of the control. The stability of dough showed higher value than the control except 2% addition group. The highest viscosity was at the 4% addition group, but 2% addition group showed the lowest viscosity. As the additional ratio of green tea powder was increased, the volume expansion ratio was increased, but water soluble solid matters contents in all addition groups had a lower level than that of the control. Also, the yellowness level of noodle was increased, but the brightness, redness and color and flavor acceptability was decreased, as the additional ratio was increased. However, 2~4% addition group of green tea powder had a similar acceptability profile to that of the control group.

2개월 남아에서 발병한 Malignant Ectomesenchymoma

황지영,서지현,김점수,김용숙,이수진,박찬후,김유경,박선후,이정희,안인옥,정기현,박병규 대한소아과학회 2001 小兒科 Vol.44 No.8

GIS을 이용한 釜山市 公共的 土地利用패턴 分析

황영우,윤철현 동아대학교 법학연구소 1999 硏究報告 Vol.22 No.2

This study tries to analyze land use pattern by zoning through urban spatial structure. Land uses in Pusan are mixed using in spite of zoning operation. New residential area is made like a frog leaping to the outer of the City. The efficiency of existing residential area is very low to compare with newly developed area cause of delayed regeneration. Especially the existing built-up area of Pusan in insufficient in adaptability and preperation going with the change of urban spatial structure, particularly with the zoning system. Therefore, detailed and scientific feasible plan should be established to have reasonable residential environment.

C_3 및 C_7위치에 치환된 새로운 세파로스포린 化合物의 合成과 抗菌活性(Ⅰ)

황화영,하재천,김영수,고옥현,강형룡 조선대학교 약학연구소 1994 藥學硏究誌 Vol.16 No.1

The synthesis and antimicrobial activity of cephalosporin having (Z)-2-(2-aminothiazol-4-yl)-2-trityloxyiminoacetamido group and 5-(2-chlorophenyl)-4-phenyl-4H-1, 2, 4-triazol-3-thiomethyl group on the C_3 and C_7 position of the cephem ring, respectively are descrived. This compound was tested for antimicrobial activity in vitro against Candida albicans ATCC 10231, Bacillus subtilis ATCC 6633, Micrococcus luteus ATCC 9341, Staphylococcus aureus ATCC 6538P, Mycobacterium phlei IIP-IPH, Escherichia coli KCTC 1039, Escherichia coli ESS, Klebisiella pneumoniae KCTC 1560, Salmonella typhymurium TV-119, Pseudomonas aeruginosa IFO 13130. The antimicrobial activity of synthetic compound was better as compare with cefotaxime and cefazoline against Micrococcus luteus ATCC 9341 & Escherichia coli KCTC ESS.

유연구조물의 잔류진동제어를 위한 시간지연기법 연구

황재혁,조현권,이혜진,박영창,박진호 한국 항공대학교 항공산업기술연구소 2001 航空宇宙産業技術硏究所 硏究誌 Vol.11 No.-

본 논문에서는 유연한 부착물을 갖는 우주구조물의 회전 시 발생할 수 있는 잔류진동을 최소화하고 또한 그 응용 범위가 넓은 입력설계 방법과 등가화 된 시간 지연기법을 다루었다. 먼저 Singh과 Vadali가 제안한 제어기를 이용하여 하나의 모드에 대한 시간 지연 제어기를 설계하고 입력설계 방법과 등가화 됨을 보였다. 그리고 실제 모델에 대한 적용과 해석을 위하여 우주구조물에서 많이 사용되는 유연구조물의 운동방정식을 유도하고 해석하였고, 실험을 통하여 입력 설계 방법과 시간 지연 기법을 이용한 잔류 진동 제어에 대한 성능이 우수함을 확인할 수 있었다. In this paper, the time-delay control (TDC) design methods for command signals to minimize the induced residual vibration followed by the maneuvers of the flexible structures has been studied. The equivalence between the time-delay control and the input shaping control has been shown and TDC is applied to control the residual vibration of the flexible structure in this study. It has been shown by a series of simulation and experiments that TDC is very effective to suppress the residual vibration of flexible structure induced by its maneuvers.

GIS를 활용한 초등 사회과 지리교육시스템의 개발

황홍섭,남영현 부산교육대학교 교육대학원 2002 논문집 Vol.4 No.-

The purpose of this study is to develop geographic education system(GES) by geographic information system(GIS) in elementary social studies. GES which is developed can make learners construct a meaningful knowledge. The development tool for GIS is MapObject LT 2 and Delphi Enterprise 5.0 as GIS software, and the edited is Auto CAD, Flash, Photo Shop, etc.. This system is divided into 5 parts : that is, ① What is a map? ② digital map that is, Seoul and Busan metropolitan city map, Korean peninsular map, world map, ③ map-maker ,④ report-maker ⑤ game. This system can make learners get more effectively than existing text-based learning because this system offers various data types such as digital map and image map, sound, image and video in each learning screen. Especially, this system maximize learning effectiveness through interaction with learners.