고로슬래그시멘트를 사용한 다공성 황토콘크리트의 성능 평가

김황희,강수만,박종식,박상우,전지홍,이진형,차상선,박찬기,Kim, Hwang-Hee,Kang, Su-Man,Park, Jong-Sik,Park, Sang-Woo,Jeon, Ji-Hong,Lee, Jin-Hyung,Cha, Sang-Sun,Park, Chan-Gi 한국농공학회 2010 한국농공학회논문집 Vol.52 No.3

This study aims to evaluate a porous concrete using hwang-toh, blast furnace slag and blast furnace slag (BFS) cement instead of type I cement. The tests that were carried out to analysis the properties of porous hwang-toh BFS cement concrete included compressive strength, continuous void ratio, absorption rate, and pH value, repeated freezing and thawing test were conducted. Test results indicated that the performance in porous hwang-toh concrete are effective on the kaoline based binder materials. The pH value were shown in about 9.5 ~ 8.5. The compressive strength was increased and void ratio was decreased with increasing the kaoline based binder materials, respectively. The void ratio and compressive strength were in the range of about 21 ~ 30 %, 8 ~ 13 MPa, respectively. The increased in void ratio of more than 25 % is showed to reduce the resistance of repeated freezing and thawing. Also, the resistance of repeated freezing of thawing and the compressive strength of porous hwang-toh BFS cement concrete are independent with hwang-toh content and BFS cement amount. But, the void ratio was decreased with increasing the high volume hwang-toh contents (more than 15 %).

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.

소디움 루프 운전지원시스템

황종선,남호윤,문성익,이광형,조충호 한국경영과학회 1996 한국경영과학회 학술대회논문집 Vol.- No.1

본 연구에서는 액체금속로의 핵심구조인 소디움루프를 위한 운전지원 전문가시스템을 개발한다. 소대움루프는 현재 원자력연구소에서 연구 개발 단계에 있으며, 안전 운전을 위한 운전 지식을 연구하고 있는 중이다. 본 논문에서는 이러한 연구 상황에 맞추어 개발되는 전문가시스템에게 요구되는 특징을 정리하고, 소디움루프 운전의 효과적 지원과 운전원의 편의에 중점을 둔 전문가시스템의 개발을 설명한다.

두가지 혈류 유발방법에 의한 새로운 심폐소생술(이중 혈류 유발 심폐소생술)장치의 개발

황성오,김현,조준휘,오범진,임종천,최경훈,윤정한,이승환,김영식,이강현,이윤선 大韓應急醫學會 1999 대한응급의학회지 Vol.10 No.2

Background: There have been many efforts to augment blood flow during cardiopulmonary resuscitation. These efforts have focused on maximizing the effect of cardiac pump or thoracic pump alone. However, considering that the heart is the biggest blood reservoir and increase of intrathoracic pressure can generate blood flow, simultaneous exploitation of both mechanisms may have synergistic effect. We hypothesized that simultaneous chest constriction in addition to sternal compression by standard CPR may have additive hemodynamic effects by preventing deformation of the chest and increase of intrathoracic pressure. Methods and results: we built a new mechanical device to perform compression and thoracic constriction simultaneously. The device consists of two main elements. Piston in the center is to depress the sternum. Strap is to constrict the thorax circumferentially. Strap is attached to both sides of the piston. When the piston is pushed down, it depresses the sternum and pulls on the thoracic strap. To determine strap width to produce optimal hemodynamic effect, we measured hemodynamic parameters with variable widths of strap in two dogs after induction of ventricular fibrillation. Result of the experiment showed that 10cm wide strap was determined to be most effective. We also determined optimal depth of compression to produce maximal hemodynamic effect with animal experiments using two dogs. Animal experiments showed that the highest aortic pressure could be generated when the stemum was depressed to 5 cm. Cardiopulmonary resusciation using a new device could generate higher systolic aortic pressure, coronary perfusion pressure and end-tidal carbon dioxide tension in comparison with standard cardiopulmonary resuscitation in a pilot animal study using two dogs. Conclusion: New cardiopulmonary resuscitation method using a mechanical device designed by us could perform sternal compression and simultaneous thoracic constriction, and generate better hemodynamic effects than standard cardiopulmonary resuscitation in pilot animal experiments.

Fuzzy 이론을 이용한 건설공사의 리스크 분석 방법

황지선,한현종,신종현,이찬식 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2

The purpose of this paper is to develop a risk analysis method using fuzzy theory for construction projects. Construction risks are generally evaluated as vague linguistic value by subjective decision making. Fuzzy theory is a proper method to quantify vague conditions of construction activities. Therefore, this study utilizes fuzzy theory to analysis construction risks. Risks are identified and classified into two levels such as upper level risk factors and lower level risk factors by RBS(risk breakdown structure). The risk exposure of lower level risk factors is assessed using fuzzy inference individually and their absolute and relative weights are estimated by fuzzy measure and AHP respectively. The estimated risk exposures and weights are aggregated to assess the risk exposure of upper level risks by Choquet fuzzy integral.

2-헵타데실-2-옥사졸린의 공기-물 계면에서의 일분자막 및 LB막 특성

황선경,이범종 인제대학교 기초과학 연구소 1999 자연과학 Vol.3 No.-

2-헵타데실-2-옥사졸린(C17-OXZ)양친매성 분자의 공기-물 계면에서의 개환 반응과 Langmuir-Blodgett(LB)막의 가교화에 대해 연구하였다. C17-OXZ는 스테아르산과 2-아미노에탄올의 탈수 및 고리화 반응에 의해 합성되었다. 일분자막의 특성은 표면압력-면적(π-A)등온선으로 확인하였다. 하층액이 산성일 때 또는 폴리알릴아민을 포함하고 있을 때 일분자막이 더욱 팽창하였다. 그러나, 알칼리 하층액에서는 순수인 경우에 비하여 π-A등온선상에 주목할 만한 변화가 관찰되지 않았다. 폴리아크릴산을 포함하는 경우에서는 더욱 팽창된 일분자막을 형성하였고 표면압력의 자발적인 증가가 발견되었다. 일분자막의 상변화는 Brewster 각 현미경(BAM)에 의하여 관찰되었다. 일분자막들은 플루오르화 칼슘기판에 누적되었고 FT-IR 분광법으로 분자구조를 결정하였다. 그 결과 옥사졸린의 개환 중합보다는 이미노 이중결합의 가수분해 반응이 우세함을 확인하였다. LB막의 안정성은 다공성 기판 위로의 누적형태를 주사 전자 현미경으로 관찰함으로써 간접적으로 평가하였다. 하층액에 폴리아크릴산을 포함하는 경우가 가장 안정된 LB막을 형성하였다. The network structures of monolayers are important for molecularly-thin films such as the LB film in order to improve the intrinsic fragility and to make their technological applications possible. In this study, we investigated the ring-opening reaction of 2-heptadecyl-2-ox-azoline(C17-OXZ) at the air-water interface and its formation of network LB films. The amphiphile C17-OXZ was synthesized via dehydration and cyclization of stearic acid with 2-am-inoethanol. Monolayer behaviors were studied at the air-water interface by measuring the surface pressure-area(π-A)isotherms. When the subphase became acidic or contained poly(allylamine), the monolayers showed more expanded phases. However, any noticeable change of the π-A isotherm was not observed in alkaline subphase compared with that of pure water subphase. When poly(acrylic acid)was dissolved in the subphase, the π-A isotherm revealed expanded monolayer and a spontaneous increase of surface presssure was found. Phase changes of the monolayers were observed by Brewster angle microscopy(BAM). The monolayers were transferred onto calcium fluoride substrates and the molecular structures were determined by the FT-IR spectroscopy. However, the competitive advantage was favored to hydrolytic reaction of imino double bond rather than the ring-opening polymerization expected from the imino nitrogn on oxazoline ring. The stability of the network film was indirectly evaluated by the SEM observation of the film morphology covered over the porous substrate. The most stable LB film was produced from the subphase containing poly(acrylic acid)

방광질루 치험

황선태,이종찬,양상국,김홍섭,노용수 건국대학교 의과학연구소 1996 건국의과학학술지 Vol.5 No.-

Vesicovaginal fistula is a distressing complication which may follow hysterectomy, prolonged labor, chemical cauterization due to uterine prolapse, radiation therapy and cervix cancer. The management of vesicovaginal fistula still remains controversial in regard to the type of approach and timing of repair but the classic opinion is to wait 3 to 6 months to allow the surgical inflammatory reaction to subside. We experienced 4 cases of vesicovaginal fistula which were as follows; Case 1: 51-year-old The vesicovaginal fistula, about 3.0cm in diameter, after laparascopic hysterectomy 15 days ago was repaired with interposition of a gracilis muscle flap via the transvaginal route. Case 2: 38-year-old The vesicovagianl fistula, about 2.5cm in diameter, after Cesarean section 5 years ago was repaired with interposition of the omental flap via the transabdominal route because she had been accompanied by an overian cyst. Case 3: 46-year-old The vesicovaginal fistula, about 2.5cm in diameter, after manual self abortion at home 30 years ago was repaired with interposition of fibro-fatty tissue in labia via the transvaginal route. Case 4: 43-year-old The vesicovaginal fistula, about 2.0cm in diameter, after prolonged labor 12 years ago was repaired with interposition of the fibro-fatty tissue in labia via the transvaginal route. There noted no complications or recurrence during the minimal 1 year follow-up.

저강도 초음파치료의 골절치유 효과

황태선,김종만,이충휘 한국전문물리치료학회 1998 한국전문물리치료학회지 Vol.5 No.3

AbstractNoninvasive low intensity ultrasound has been shown to be an effective means of accelerating bone fracture repair in both animal and clinical studies. The effects of ultrasound stimulation on bone repair after fibular osteotomy were assessed in a rabbit fibular fracture model. Bilateral closed fibular fractures were made in skeletally mature male White Japanese rabbits. In this study, 24 subjects were randomly divided into 2 groups: experimental group 1 (n=12), and experimental group 2 (n=12). Experimental group 1 received 0.875MHz continuous ultrasound and Experimental group 2 was treated with 3 MHz continuous ultrasound. The ultrasound intensity was 50 mW/ciif and treatment time was 10 minutes for every session in both groups. In each rabbit, one fibula served as a control and the other was subjected to ultrasound treatment 5 times per week for 3 weeks. After 3 weeks, rabbits were sacrificed and the ratios of the area between the trabeculae and bone marrow of the fibulae were calculated. At the end of the experimental period, 14 of the 24 rabbits were excluded due to complications from surgery or inadequate fracture status for this study. There was no statistically significant difference in the trabeculae area between experimental leg and control leg in experimental group 1 and experimental group 2 (p>0.05). And there was also no statistic- statistically significant difference between experimental group 1 and experimental group 2 according to ultrasound treatment frequencies, 0.875MHz and 3 MHz (p>0.05). These data suggest that in Japanese white rabbits, low intensity ultrasound stimulation does not facilitate fracture repair nor is there any difference in fracture repair results between ultrasound frequencies, 0.875 MHz and 3 MHz.

소프트웨어 프로세스 개선을 위한 SPICE 모델 분석

황선명,이종은 대전대학교 산업기술연구소 1998 산업기술연구소 論文集 Vol.9 No.2

Software Process Improvement(SPI) is aimed at improving an organization's software process capability. The SPICE Standard for SPI is intended for assessments that support two main activities : software improvement and software capability determination. In this paper, we analyze and describe the characteristics of SPICE and compare SPICE with CMM and other models. Through this analysis, we can find the trends of international standards about software process assessment and improvement.

한국인 정신분열병과 HLA-DRB1 대립유전자의 관련성

황나영,김종원,오흥범,조지희,오선영,홍진표,박종익,이동은 大韓神經精神醫學會 2000 신경정신의학 Vol.39 No.5

연구목적: 유전이 정신분열병의 중요한 원인이라는 것은 널리 인정되어 왔다. 본 연구는 한국인 정신분열병과HLA-DRB1 유전자좌와의 관련성을 알아보고 외국인 대상의 보고들과 비교함으로써 한국인 정신분열병의 유전적 특성을 밝히고자 시행하였다. 방법: 정신분열병 환자 70명을 대상으로 HLA-DRB1 대립유전자를 고해상도 수준까지 분석하였다. 저해상도 수준의 HLA-DR결과는 정상 한국인 2,000명의 연구 보고와 비교하였으며 고해상도 수준의 HLA-DRB1 결과는 정상 한국인 229명의 연구 보고와 비교하였다. 결과: 저해상도 수준에서는 HLA-DR11이 정신분열병 환자군에서 9.0%, 정산인에서는 3.8%의 빈도를 보여 환자군에서 통계적으로 유의하게 높은 빈도를 보였으며(p=0.005), 고해상도 수준에서는 HLA-DRB1*1101이 환자군에서 9.0%로 정상인의 1.8%보다 유의하게 높은 빈도를 보였다(p<0.001). 결론: 본 연구에서는 한국인 정신분열병과 HLA-DR11(HLA-DRB1*1101)이 양적 상관관계를 보여 백인에서 DR4와 부정적 상관관계를 보인 결과나 일본인에서 DR1(DRB1*0101)과 양적 상관관계를 보인 결과와 상이하였다. 이러한 한국인 정신분열병 환자의 유전적 특성은 가족연구 혹은 더 많은 수의 환자를 대상으로 한 관련연구를 통하여 재확인되어야 할 것이다. 중심단어:정신분열병·HLA-DRB1·관련연구. Objective: A genetic predisposition is widely accepted in schizophrenia. This study was intended to fine any association of HLA-DRB1 alleles with korean schizophrenics and thereby compare the results of other ethni groups. Method: The subjects were 70 unrelated Korean patients. Low and high resolution typing of HLA-DRB1 alleles were performed. The comparison groups were 2,000 unrelated healthy Koreans for low resolution HLA-DR and 229 unrelated healthy Koreans for HLA-DRB1 alleles. Results: Gene frequencies of HLA-DR11(patients 9.0%, healthy control 3.8%, p=0.005) and HLA-DRB1*1101(patients 9.0%, healthy control 1.8%, p<0.001) were significantly higher in Korean schizophrenics. Conclusion: The frequency of HLA-DR11(HLA-DRB1*1101) is significantly higher in Korean schizophrenics than in healthy Koreans. HLA-DR4 and HLA-DR1, which were known to be associated with Caucasian and Japanese schizophrenics, respectively, did not show statistical association with Korean schizophrenics. This association need to be reassured though further studies with families or association study with larger numbers of subjects. KEY WORDS:Schizophrenia·HLA-DRB1·Association study.