女大生들의 PWC_75%HRmax와 Vo_2max에 對한 調査硏究

白光鉉 誠信女子大學校 1990 硏究論文集 Vol.30 No.1

This study was performed to kmow the level of the college women in PWC and ??O_2 _max that has been generally accepted as the most accurate measure of the capacity of the cardiorespiratory system, i, e., the aerobic power and the total fitness. The subjects in this investigation were Tae kwon do athletes(N=7), freshmen(N=13) and senior(N =6)college women randomly selected in physical education and other majors at Sung shin Women's University. All subjects completed the PWC and submaximal ??O_2 _max test on the cycle ergometer. The results were summerized as follows : 1) PWC _75% _Hrme value showed significant difference(p <0.01) between the Tae kwon do athletes(116¡3/413.42) and the other groups, but it showed no significant difference between other three groups. In general level of the PWC, Tae kwon do athletes were the 4^th glade(good), and physical education students(86¡3/425.5,82¡3/423.1)were 3^rd glade(average), other majors(73¡3/414.9)were 2^nd glade(poor). 2) ??O_2 _max per weight showed significant difference(p<0.05)between the Tae kwon do athletes (41.6¡3/46.05)and the groups, but it showed no signifi-cant difference between the other three groups. In general level of ??O_2 _mar per weight, Tae Kwon do athletes were "good", and the other groups (33.3¡3/47.33,34.4¡3/46.46,33.8,¡3/45.19)were "average".

成人女性의 心肺機能과 回復方法에 따른 血中乳酸 및 Catecholamine 變化에 關한 硏究

백광현,박수연,박철빈 경희대학교 체육과학연구소 1997 體育學論文集 Vol.25 No.-

The purposes of this study were 1) to investigate the effect of blood lactate disappearance during maximal exercise load and recovery; 2) to deteermine changes of blood lactate concentrations during incremental maximal exercise for the training and non-training groups; 3) to estimate changes of chrdiopulmonary function during exercise and recovery; 4) to analyze changes of plasma epinephrine, and norepinephrine during exercise and recovery. The subjects of this study consist of a total of 16 young adult women with a mean age of 22.1 year (7 basketball athletes and 9 women students) who are following at Physical Education department in S womens universilty. Incremental maximal exercise load test and active recovery (Vo2max40%) and passive recovery after Vo2max 100% were conducted on the treadmill three times at a week interval. 1.The results of this study indicated that with increasing time of exercise during the same intensity of exercises oxygen uptake was significanatly「(P<.05) higher in non-training group than training group. However, oxygen uptake was high in training group(52.34±9.87ml/kg/min) compare to non-training group(46.07±7.01ml/kg/min) at the level of all-out exorcise. 2.Respiratory exchange ratio at 10min absolute maximal exercise load was significantly high(P<.05) in non-training group(0.95 ±0.05) compare to training group(0.90± 0.05). 3.Hear rate at rest, during exercise, and recovery was high in non-training group compare to training group. Especially significant difference(p<.05) could be observde in heart rate between training(148.6±18.3beats/min, 175.0± 12.7beats/min) and non-training groups(164.1 ± 18.3bents/min. 189± 10. 1beats/min) at 6 and 10 min exercise. 4.Ventilation volume increased with increasing title and intensity of exercise and there was no difference between training and non-training groups. 5.Blood lactate concentrations during 6,8, 10, and 12 min of incremental maximal exercise load were significantly (p<.05) low in training group(1.51 ±0.41mM/l, 1.830mM/l. 1.84±0.37mM/l, 3.11 ± 0.33mM/l) compare to non-training group(2.28±0.51mM/l, 3.09±0.50mM/l. 4.85± 1.16mM/l. 6.09 ±0.99mM/1). 6.Blood lacate concentrations at recovery after a brief period of maximal exertcise load was found to be significantly low (p<.01) in trainging group compare to non-training group. 7.Recove rate of blood lactate aftar a brief period of maximal exercise load was significantly high(p<.05) in active recovery method(88.25± 10.85%. 76.30± 14.67%) compare to passive recovery method(42.41 ±8.93%, 46.69± 13.50%). 8.There was no significant change in plasma epinephrine for training 76.27±14.67pg/ml, 60.76±34.53pg/ml and non-training 72.37±23.46pg/ml, 77.10±28.58pg/ml groups at passive and active recovery after a brief period of maximal exercise load. However, plasma epinephring was significantly low(p<.05) in training group compare to non-training group. 9.There was no significant change in plasma norepinephrine for training (232.34±33.16pg/ml, 263.51±93.25pg/ml) and non-training(244.37±91.87pg/ml, 244.97±47.44pg/ml) groups at passive and active recovery after a brief of period of maximal exercise load. However, no significant difference was found in plasma norepinephrine between training antral non-training groups. 10.There were no differences in epinephrine and norepinephrine after a brief period of maximal exercise load for active(271.48±72.16pg/ml, 297.96± 101.21pg/ml) and passive recovery(271.70±81.28pg/ml, 311.69±109.38pg/ml) respectively. 11.No relationships could be observed between epinephrine and norepinephrine concentrations and maximal capillary blood locate values after a brief period of maximal exercise load. In conclusion, blood lactate concentrations were significantly low in training group after maximal exercise load compare to non-training group. Recovery of blood lactate concentration after exercise was also faster in training group compared to non-training group. Especially, active recovery at rest was found to be more effective blood lactate disappearance. There were no changes in catecholamine after a brief period of maximal exercise load. Catecholamine concentrations were not affected by recovery method and it did not show to be influenced by blood lactate concentrations.

치료시기에 따른 상악골 전방견인효과 : 사춘기전과 사춘기의 비교 A comparison of prepubertal and pubertal patients

김경호,최광철,백형선,이지현 대한치과교정학회 2002 대한치과교정학회지 Vol.32 No.5

상악골 전방견인 장치를 이용한 골격성 Ⅲ급 부정교합 환자의 악정형적 치료에서 치료시기는 치료효과에 지대한 영향을 미칠 수 있으며 이상적인 치료시기는 연구자에 따라 다소의 차이는 있으나 다른 형태의 부정교합보다는 다소 이른 사춘기 이전의 어린 나이라는 것이 선학들의 공통된 의견이었다. 하지만 통계적 자료들을 바탕으로 한 최근의 논문들은 과거 선학들의 의견을 뒷받침 해주는 논문과 그렇지 않은 논문들로 나뉘고 있어 이상적 치료시기에 대한 정립된 의견이 없는 실정이다. 이에 본 연구에서는 119명의 환자들의 수완부골 방사선 사진을 평가하여 골성숙도에 따라 사춘기전군과 사춘기군으로 분류하고 치료전후 측모두부방사선 사진을 분석하여 상악골 전방견인에 대한 치료효과를 비교하였다. 평균 치료기간은 사춘기전군은 6.5개월, 사춘기군은 6.1개월이었으며 치료전후의 측모두부방사선 사진을 분석한 결과 다음과 같은 결론을 얻었다. 1. 상악골의 전방이동양은 사춘기전군과 사춘기군간에 차이에 없었다. 2. 상악골의 하방이동양은 사춘기전군과 사춘기군간에 차이가 없었다. 3. 하악골의 하방이동양과 후하방회전양은 사춘기전군과 사춘기군간에 차이가 없었다. 4. 치성이동양은 사춘기전군과 사춘기군간에 차이가 없었다. 이상의 결과로 사춘기전 뿐 아니라 사춘기에서도 상악골 전방견인에 의해 상악골 성장촉진과 함께 성공적인 악정형 치료가 가능함을 알 수 있었다. Treatment timing is a very important factor to consider in treating skeletal Class Ⅲ patients by means of maxillary protraction. According to the literature maxillary protraction should be carried out at an early age before puberty. However, no scientific data were presented to support this statement and recent studies supported by statistical data showed disagreement concerning the optimum treatment time of maxillary protraction. Therefore, there is no agreement about the optimum treatment time of maxillary protraction. In this study hand-wrist X-rays were taken from 119 patients and subjects were grouped into prepubertal and pubertal group according to their skeletal maturity . Preagreement and posttreatmrnt lateral cephalometric X-rays were taken and treatment effects were compared. The average treatment time was 6.5 months for the prepubertal group and 6.1 months for the pubertal group. The obtained results were as follows : 1. The amount of maxillary forward movement was the same for prepubertal and pubertal group. 2. The amount of maxillary downward movement was the same for prepubertal and pubertal group. 3. The amount of mandibular downward and backward rotational movement was the same for prepubertal and pubertal group. 4. Dental effects were the same for prepubertal and pubertal group.

Spin-Peierls 전이를 하는 CuGeO₃계의 이온 치환 효과

이영배,채광표,권우현,백서욱,이성호 건국대학교 자연과학연구소 1998 建國自然科學硏究誌 Vol.9 No.1

Spin-Peierls 전이를 하는 CuGeO₃계에 원소를 치환했을 때의 자기적 및 결정학적 특성을 비교 검토하고, 직접 Cu₁-xGe₁-xFe₂O₃(x=0.05, 0.1) 시료를 제조하여 SQUID, Mssbauer 분광기, X-선 회절 방법으로 연구하였다. 이 시료의 결정구조는 orthorhombic 이고 격자 상수는 x= 0.05 때 a = 4.795Å, b=8.472Å, c=2.904Å 이고 x=0.1때는 a=4.784Å, b=8.472Å, c=2.904Å였다. 상온에서 Mssbauer 스펙트럼은 Fe³+ 이온의 사면체 자리에 의한 이중선과 팔면체 자리에 의한 Zeeman 선으로 중첩되어 나타났고 자기감수율의 극대점과 Mssbauer 변수의 불연속으로부터 본 시료의 spin-Peierls 전이 온도는 13K 임을 알아냈다. The magnetic and crystallograpic properties of the substituted spin-Peierls transition CuGeO₃ system have been reviewed, and we synthesized the Cu₁-xGe₁-xFe₂xO₃ (x=0.05 and x=0.1) system and studied by superconducting quantum interference device, Mossbauer spectrometer and x-ray diffractometer. The crystal structure is orthorhombic and the lattice constants are decreased as increasing iron contents. That is, in Cu₁-xGe₁-xFe₂xO₃ system a=4.795Å, b=8.472Å and c=2.932Å for x=0.05, and a=4.784Å, b=8.472Å and c=2.904Å for x=0.1 respectively. The Mossbauer spectra are superposition of the doublet due to the Fe³+ ions at tetrahedral sites and the sextet due to the Fe³+ ions at octahedral sites at room temperature. From the cusp of the magnetic susceptibility and the discontinuity of Mossbauer parameters we found the spin-Peierls transition temperature of our samples is 13K.

조혈모세포이식술이 골수기질세포의 기원 및 조골세포로의 증식 및 분화에 미치는 효과

강무일,조성원,오은숙,백기현,이원영,오기원,김혜수,한제호,윤건호,차봉연,이광우,손호영,강성구,김춘추 대한내분비학회 2000 Endocrinology and metabolism Vol.15 No.4·5

Case Report : Kaposi Sarcoma after Corticosteroid Therapy for Idiopathic Thrombocytopenic Purpura

Kwang Hyun Choi,Jae Ho Byun,Jun Young Lee,Baik Kee Cho,Hyun Jeong Park 대한피부과학회 2009 Annals of Dermatology Vol.21 No.3

Kaposi sarcoma (KS) is a multifocal vascular neoplasm most commonly seen in association with human immunodeficiency virus infection. However, KS has also been reported in patients treated with immunosuppressive agents. However, it is very rare to find KS in association with idiopathic thrombocytopenic purpura (ITP). Here we describe a 58-year-old male patient suffering from ITP treated with corticosteroid therapy who developed KS and present a review of the literature. (Ann Dermatol 21(3) 297~299, 2009)

국내 기업의 u-비즈니스 현황 및 전망

Kwang-Hyun Baik(백광현) 한국전자거래학회 2007 한국전자거래학회 학술대회 발표집 Vol.2007 No.-

Free Paper Session : HCC ; Therapeutic effect of transcatheter arterial embolization for hypervascular hepatocellular carcinoma: web-based multicenter analysis (초)

( Jun Hyun Baik ),( Kyung Sup Song ),( Joon Koo Han ),( Sung Wook Choo ),( So Hee Park ),( Hyun Joo Kong ),( Sung Wook Shin ),( Kwang Hun Lee ),( Jae Kyu Kim ) 대한간학회 2011 Clinical and Molecular Hepatology(대한간학회지) Vol.17 No.3(S)

배 검은별무늬병에 대한 Fluxapyroxad/Pyraclostrobin 합제의 방제 효과

민광현(Kwang-Hyun Min),유정필(Jeong-Pil Ryu),김주미(Ju-Mi Kim),김선화(Sun-Hwa Kim),임순희(Sun Hee Yim),최장전(Jang Jeon Choi),조백호(Baik Ho Cho),양광열(Kwang-Yeol Yang) 한국농약과학회 2014 농약과학회지 Vol.18 No.4

The mixture of fluxapyroxad plus pyraclostrobin or the 9 time-spray schedule with various fungicides was evaluated for their efficacy in controlling pear scab in field trials. It showed sufficient condition to evaluate the efficacy of fungicides for the control of pear scab since disease incidence of the untreated control plot was 58.4% or 100% on leaves or fruits, respectively. Pear scab on leaves was occurred by 6.3% at treated plot with the mixture of fluxapyroxad plus pyraclostrobin, resulting in the 89.2% of control value. Incidence of the fruit disease was 16.7% at treated plot with the mixture of fluxapyroxad plus pyraclostrobin, showing 83.3% of control value. When the 9 time-spray schedule was tested, pear scab was occurred by 5% or 13.3% on leaves or fruits, respectively. Their control values were the 91.4% on leaves or 86.7% on fruits. Although the 9 time-spray schedule showed slightly lower disease incidence than the mixture of fluxapyroxad plus pyraclostrobin, but there is no statistically significant difference. These results suggest that the mixture of fluxapyroxad plus pyraclostrobin can control effectively the pear scab.

u-러닝 산업 활성화를 위한 정책에 관한 연구

백광현(Baik Kwang-Hyun),김경수(Kim, Kyung-Soo) 한국산학기술학회 2007 한국산학기술학회논문지 Vol.8 No.6

본 연구에서는 차세대 고부가가치 지식산업이 될 u-러닝에 대한 개념, 그리고 국내·외 u-러닝 시장 동향 및 u-러닝 산업추진상의 문제점을 살펴보았다. 이와 더불어 국내 u-러닝 산업의 SWOT 분석을 통해 국내 산업 경쟁력 확보하기 위한 정책과제 및 추진방향을 도출하였다. The u-Leaning just begins to emerge as the next-generation knowledge-based business. Since it has a great potential to become a high value-added industry, there is much attention paid in this field. In this work, we first summarized the concept of the u-Learning where the architecture of various u-Learning areas has been identified. Then we investigated the current status and problems of the u-Learning industry. Through the SWOT analysis, we have extracted the political strategies that will be essential for the rapid industrialization of u-Learning which will, in turn, contribute much to enhance the competitiveness of national economy.