콘크리트 보수용 폴리머 복합재료의 접착강도 특성

신영수,연규석,이윤수,지경용 강원대학교 부설 석재복합신소재 제품연구센터 1999 석재연 논문집 Vol.4 No.-

이 연구는 기존 시멘트 콘크리트 구조물의 표면층과 보수용 폴리머 모르터의 접착강도 특성을 구명키위해 폴리머 결합재의 종류, 결합재 첨가량, 모재의 표면상태를 변수로하여 실험한 것이다. 폴리머 시멘트 모르터제조에 상용된 재료는 시멘트 혼화용 폴리머로서 styrene-butadiene rubber (SBR)를 사용하였고, 폴리머 모르터의 결합재로는 에폭시 수지 (EP)와 불포와 폴리에스터 수지 (UP)를 사용하였다. 실험결과 모재가 건조상태인 경우 습윤상태보다 강도가 높게 나타나 모재의 상태가 건조한 것이 접착강도에 유리한 것으로 나타났으며, 폴리머 시멘트 모르터가 폴리머 모르터에 비해 접착강도가 낮음을 알 수 있었다. The adhesion properties of polymer mortars for cement concrete repair were evaluated with respect to polymer types, binder ratios and the surface conditions of cement concrete substrate. Styrene-butadiene rubber (SBR) was used as an additive for polymer cement mortar and epoxy resin (EP) and unsaturated polyester resin (UP) were used as binders for polymer mortars. The adhesion strength of polymer cement mortar was smaller than that of polymer mortar. The adhesion strengths to the dry surfaces of substrate were larger than those to the wet surfaces, indicating that the dryness of substrate increased the adhesion strength in repairing concrete structures.

무주지역에서 채취한 산삼 생육 토양미생물에 대한 동정 연구

신동엽,박용일,김홍렬,안덕균,박성규 대한본초학회 2002 大韓本草學會誌 Vol.17 No.2

objectives : Microorganisms were isolated from soils remaining attached to the roots of Wild Panax ginseng C.A. Mey. naturally grown in Moo-Ju area. methods : As a preliminary study for the establishment of wild ginseng radix discrimination system based on area of growth, these isolates were identified by using mainly API 20NE and API 50CHB kits and the microbial consortia were compared. From the sample of Moo-Ju area, 9 and 6 strains were isolated and identified after the incubation of agar plates at 30℃ and 37℃, respectively. results : The results showed that 2 strains of soil bacteria, Aeromonas hydrophilia, and Bacillus cereus commonly existed in the roots of wild ginseng of both 30℃ and 37℃. And that 6 strains, Pseudomonas putida, Stenotrophomonas maltophilia, Pseudomonas fluorescence at 30℃ and Bacillus subtilis, Empedobacter brevis, Brevi. laterosporus at 37℃, inhabited specifically in the roots of wild ginseng of Moo-Ju area. conclusion : These results suggest that comparison of microbial consortia associated with roots of wild ginseng could be used for the establishment of a naturally growing wild ginseng radix discrimination system.

과학과 인지적 영역의 평가에 관한 연구

신맹립,윤지홍,김규용 濟州大學校 師範大學 科學敎育硏究所 1986 科學敎育 Vol.3 No.-

The purpose of this study is to find out students' cognitve abilities in science lessons. Bloom's Taxonomy of Educational Objectives' Klopfer's Specification for Science Education, and Piaget's cognitive Development Theory were reviewed to build the evaluating tool. The contents of the constructed tool includes 33 percents' experimental items, and the rest were non-experimental. In the evaluating methods three types of questioning were adopted : multiple choice(79%), short answer test(l5%). and essay typy(6%). Data were collected from 359 students' who are attending middle schools in two cities in Cheju-do. To find out the statistical facts, students' scores were calculated into mean, standard deviation and percentile. The analysis of the data showed the following results : The average score of students' scientific thinking ability is around 58.3 which stands for lower state of thinking ability than expected. Students got higher scores in questions on the experimental-observational contents of learning. It seems that students understand this content of learning more easily than the others. However, students got very lower scores in the contents of learning which include such higher mental-processes as secondary, synthetic functions. It suggests that teachers ought to pay more attention to this content of learning to stimulate students higher mental ability. Score distribution and higher mental function showed positive relationship. The study has made certain that through the evaluating frame of cognitive domains we can assess students ability on the experimental areas of learning except the manual skills, even if paper tests are practiced.

도금공정 6가 크롬 미스트의 공기중 및 시료채취 여과지상 환원속도에 관한 연구 : 시료채취중 환원속도와 손실 보정 Reduction Rate during Sampling and Correction for the Loss

신용철,이병규,김선자,김향순 한국산업위생학회 2003 한국산업보건학회지 Vol.13 No.2

Hexavalent chromium, Cr(Ⅵ),may reduce on polyvinyl chloride (PVC) filter during air sampling. This study was conducted to cstimate the reduction rate of Cr(Ⅵ) on PVC filter during air sampling and an correction equation for th loss of Cr(Ⅵ) by feduction in an industrial plating process. The reduction of Cr(Ⅵ) was progressed rapidly in 60 minutes and slowly thereafter. The empirical reduction rate of Cr(Ⅵ) (Y) over sampling time (X, min) was the following : Y= 0.916 -0.0208√x (r=0.73, p〈0.05). The loss of Cr(Ⅵ) caused by reduction during sampling can be corrected using the following empirical equation : Sc = S x 1/Y. where Sc = corrected value, S = analytical result, and Y= reduction rate of Cr(Ⅵ).

응급실을 내원한 구강악안면외과 안면골 골절 환자의 변화에 대한 비교 연구

신상훈,성화식,강영훈,황대석,김용덕,김욱규,김종렬,정인교 부산대학교 병원 암연구소 2008 부산대병원학술지 Vol.- No.24

Although there have been many clinical studies about the facial trauma in the recent as well as in the past, severity and frequency of facial trauma are reported multifarious. It seemed to be because of variety of social, cultural, and environmental factors, and the view point of investigators. In this study, we investigated about the patients visiting emergency room during recent 4 years(2004-2007), and compared with retrospective study during former 10 years(1992-1996, 1999-2003) in Dept. OMS Pusan National University Hospital. We assessed the cause, type, demographic, etc, and analyzed alterations of facial bone fractures during past 3 periods. The results were as follows. The total number of patients was increased. 429 patients treated for maxillofacial fractures between January 1992 and December 1996, 466 patients treated between January 1992 and December 1996 and 764 patients treated between January 2004 and December 2007. The male-to-female ratio were 4.6:1, 3.9:1, and 4.16:1, respectively. Patient in the age groups of 10-19 years and 20-29 years increased in the latter two periods. Assaults and falls are decreased gradually, but slip down s are increased. Traffic accidents are still major cause of facial trauma. The mandibular fractures showed the highest incidence thorought three periods. Symphysis fractures of mandible was increased and condyle fractures of mandible was drecreased in the third period.

한국재래흑염소에서 발정 및 과배란 유도와 외래유전자 주입에 적합한 1세포기 수정란의 채취

신상태,이두환,김명철,이운규,이철상,한용만,이경광 충남대학교 수의과대학 동물의과학연구소 1998 動物醫科學硏究誌 Vol.6 No.-

Three different treatments for induction of estrus in Korean native black goats were compared: follicle stimulating hormone(FSH, FSH-p^TM), FSH combined with MAP(intravaginal impregnated sponges, Veramix^ⓡ, containing 60 ㎎ medroxy progesterone acetate for 14 days), and FSH combined with progesterone(Ovaron^ⓡ, 10 ㎎ IM for 10 days) and PGF_2α(Lutalyse^ⓡ, 3 ㎎ IM at first FSH injection). FSH for inducing estrus and superovulation was given a total 20 ㎎ intramuscularilly in decreasing dosage injections twice daily over 4 days. The MAPs were withdrawn at the 3rd day of FSH injection. Estrus observations were conducted every 6 hours from last FSH injection for 24 hours by placing the does with fertile male goats. Estrus and superovulation were more successfully induced with treatment of MAP + FSH than other treatments(FSH only, or progesterone + PGF_2α + FSH) (estrus induction; 100 vs 42.8 and 71.4%, ovulation points; 11.4 vs 5.4 and 4.4, respectively). The effect of gonadotropin releasing hormone(GnRH) on the ovulation rate was also examined. However, no difference was observed for inducing ovulation with treatment or dosage(100 ㎍ 200 ㎍) of GnRH. Low midline laparotomies were performed, and then ovarian responses (ovulations and follicular development) were examined by exteriorization of the reproductive tracts. Ova were recovered from oviducts by retrograde flushing 60-146 hours after MAP removal, and were classified the developmental stages. Overall 66.1% (236/357) of recovery rate was obtained from 30 superovulated does. The optimal recovery time of microinjectable 1-cell zygotes was approximately 72-76 hours after MAP removal.

청소년 범죄 기사 내용 분석

신용규,나철,이길홍 중앙대학교 의과대학 의과학연구소 1997 中央醫大誌 Vol.22 No.4

The present study was performed to identify the socio-psychiatric aspects of adolescent criminal offences reported on daily newspapers and to use them as basic materials for prevention of adolescent criminal offences. The author analysed 609 cases of adolescent criminal offence who reported on Dong-a Ilbo and Chung-Cheong Ilbo, from 1991 to 1995. The total numbers of cases were 609, including 573 males and 36 females. In data analysis, the subjects were devided into three subgroups as the student group(221 cases), the working group(70 cases), and the jobless group (318 cases). and the result of the study were as follows. 1. The cases of adolescent criminal offences were more common in male. Their mean ages were the youngest in the student in contrast to late subgroup of the working or the jobless. 2. The antisocial personality was the most common in the jobless, while the dramatic cluster including the borderline or masochistic personality was more prevalent in the working, and the anxious cluster was more in the student. In psycho-social stressors, the student was suffered from various stress in school, home and their social life, while the working showed more serious stress in their hetero-sexual and business life, or more experienced maladjustment in their social and job life, and the jobless group showed more stressful burden due to economical problems, or more experienced maladjustment in their family life. 3. In subtypes of criminal offences, violence, fatal assult, fatal injury, parricide, and their or group offences were more common in the student, while murder, rape and raising the penalty or solitary offences were more frequently observed in the working, and felony was the most prominent offence in the jobless. 4. The incidence of student's offences reported in daily newspapers was remarkably increased, while those of the working or the jobless were decreased. The most vulnerable time of criminal offence in adolescents was from 7-12 PM, and these trends were prominent in the jobless compared with the student in afternoon, and the working in midnight. 5. In motivation of crimes, the psychological conflicts were the most in the student, while the curiosity, the various personality problems, and the heterosexual conflicts were common in the working, and the economical problems or the absence of motivations were prominent in the jobless. 6. In the tools of crime, the sharp materials were the most ones in the student compared with the fists, knives or guns in the working, and the absence of tools in the jobless. In the methods of crime, the latent aggression or physical aggression were the most ones in the student, compared with the forced aggression or direct aggression in the working. 7. In terms of accompanied person participating in criminal offence, group offence was prevalent(60.9%). The numbers of accompanied persons were more than 4 persons in the student, compared with the 2 persons in the working group, and the 1 person in the jobless. In the age ranges of accompanied persons, the student showed the youngest, while the jobless showed the oldest ones. 8. Males(63.2%) were more common in victims of adolescent criminal offences, about 40% of victims was the absence of job, and adults older than 21 years old(34.6%) was the most prevalent, followed by children younger than 11 years old(21.8%). Most of the victims in the student were their friends, lovers or parent with minor injury, while those in the working were passengers with more serious injury. The 67.8% of abusers was unknown persons with victims, and these trends were prominent in the jobless compared with more known persons in the student. 9. In the characteristics of the abuser, the working used more various psychoactive substances or alcohols, and more frequently experienced hallucination or delusion at the time of criminal offence compared with the other groups.

정신분열병에 대한 Risperidone의 효과 및 안전성에 관하여

신석철,왕성근,지익성,이선우,이규광,이봉희,이진영,황선희,신용재,배경도,김정란 충남대학교 의과대학 지역사회의학연구소 1997 충남의대잡지 Vol.24 No.1

In order to evaluate the efficacy and safety of risperidone, 10 patients with chronic schizophrenia were examined for 8 weeks in a silgle-open study. After the wash-out period of 1 week, risperidone was administered. Efficacy was evaluated by means of Positive and Negative syndrome Scale for Schizophernia(PANSS) and Clinical Global Impression(CGI). Safety assessment included the Extrapyramidal Symptom Rating Scale(ESRS), vital signs, body weight, ECG, and laboratory tests. The results were as follows 1) On the PANSS total score, there was significant improvement of total score after 1 week (P<.05) of administratiom. 2) On the PANSS positive and negative subscal, there were significant improvement of posotive and negative scores after 2 weeks (P<.05) of administration. 3) On the PANSS general psychopatholgy subscals, there were significant improvement of general psychopathologyscores after 1 week (P<.05) of administratiom. 4) On the CGI, there was significant decreasement of clinical impression of severity of schizophrenia score after 2 week (P<.05) of administration. 5) A statistically significant increase in body weight (P<.05) was observed after 8 weeks of administration. 6) EPS reached the peak at the end of the 1st week of administration of risperidone (11.8± 24.25) but they were easily relieved by addition of benztropine and clonazepam. There was not significant change in laboratory tests, vital sign, ECG after 8 weeks of administration. These results suggest that Risperidone is an effective antipsychotics and clinically safe except for increased body weight in chronic schizophrenia.

국민학교 영어교육 실시를 위한 실태 분석연구

신용진,조규태 全北大學校 語學硏究所 1979 어학 Vol.6 No.-

폴리머 시멘트 콘크리트 보의 휨거동

신영수,연규석,김남길 강원대학교 석재복합신소재제품연구센터 2001 석재연 논문집 Vol.6 No.-

본 연구는 압축강도 390kgf/㎠를 갖는 폴리머 시멘트 콘크리트를 제작하여 이에 대한 역학적 성질을 구명하고, 등가직사각형 응력분포 특성을 고찰하기 위해 C형 공시체에 대한 휨압축시험을 실시하여 매개변수는 각각 α=0.69, β=0.41, k1=0.82, k3=0.95, g=0.84로 산출되었다. 이러한 매개변수를 이용하여 구해지는 보의 저항모멘트와 시험에 의한 휨모멘트는 어느 정도 근접하게 나타나 비슷한 강도수준의 폴리머 시멘트 콘그리트 휨부재 설계의 기초자료로 이용될 수 있을 것이다. 그러나 철근보강 폴리머 시멘트 콘크리트 휨 부재에 대한 보다 정확한 설계기준의 마련을 위해서는 압축강도와 크기를 변수로 하는 C형 시험체에 대한 보다 많은 실험 데이터가 필요할 것으로 사료된다. This study was conducted to analyze distribution of rectangular stress block for polymer cement concrete beam. C-shaped specimens were produced and tested to compute the parameters of rectangular stress block. Computed parameters were α=0.69, β=0.41, k1=0.82, k3=0.95 and g=0.84. Experimental value of flexural strength of the beam was in good agreement with the theoretical value, but many experimental data were thought to be filed up to provide the data for designing the polymer cement concrete structure exactly.