전압원 인버터에 의한 송전선로의 직렬보상 특성해석

신익상,한병문,한경희 명지대학교 대학원 1997 대학원논문집 Vol.1 No.-

This paper describes interaction analysis between the series STATCON and the power transmission system. The series STATCON, which consists of a multi-pulse voltage source inverter, coupling transformers, and control circuit, can compensate the line reactance in capacitive or inductive mode by proper manipulation of inverter firing angle. The series compensation of the line reactance in capacitive mode offers the increase of active-power transmission capability through the line. This effect was verified through EMTP simulations for a typical one-machine infinite-bus transmission system. And it was also verified by experimental works with a scaled hardware model.

동시성 공유정신병 : 일란성 쌍생아 자매의 역할반전 Case Formulation of Role Reversal

신화식,유희정,김헌수,김현실,민병근 울산대학교 의과대학 1995 울산의대학술지 Vol.4 No.1

The twin sisters case of folie simultanee is reported here in this paper. A case of folie simultanee is described as two or more people becoming psychotic simultaneously and sharing the same delusion. The results of psychodynamic approach for this case are as follows. 1. There are a variety of conflicting hypotheses on the orgin of the disorder, ranging from the etiological explanation of organic factor to various psychodynamic approach. In this case, there is no evidence of hereditary factor on the laboratory findings and family history. Therefore the authors stressed that the psychodynamic formulation of the disorder is on the importance .of the etiological rol. It seem significant to describe that the etiology is multidimensional and includes factors such as character structure formation in processing of object relations, the emotional relationship between the partners, socio-environmental conditions and hereditary predisposition. 2. There are two issues in folie simultanee. The one is related to diagnosis. It is consider to distinguish the inductor from the recipient. The other is subject to treatment. It is important to determine whether separate the inductor and recipient by admitting the inductor for a psychiatric center or not. Furthermore, the inductor and recipient's weak ego state should be recognized in planning various psychiatric treatments. 3. It could be found in the role reversal phenomenon between the inductor and recipient during long-term course.

씀바퀴 성분 중 Cynaroside의 약동태학적 연구

신영희,민병훈,이치호 慶星大學校 1998 論文集 Vol.19 No.1

We isolated cynaroside(luteolin-7-O-glucoside) from the whole plant of Ixeris dentata, and characterized pharmacokinetic properties of cynaroside. It was administered by intravenous injection, intraperitoneal injection and oral routes to male rats, and plasma concentrations of cynaroside were analysed by HPLC method. After iv injection of cynaroside with 5mg, 10mg, and 20 mg per kg of body weight, the area under concentration curve and doses showed a good correlationships. On the other hand, cynaroside hardly absorbed by oral administration route.

GT rotary file을 이용한 만곡 근관형성시 작업 효율 및 file 변형 발생에 관한 연구

신주희,백승호,배광식,임성삼,윤수한,김병현 대한치과보존학회 2001 Restorative Dentistry & Endodontics Vol.26 No.5

Root canal preparation process is of utmost importance in successful treatment of root canal. Also, one of the most important purpose of the root canal preparation is to enlarge the root canal three dimensionally without changing the curvature of the root canal. However, as the curvature of the root canal increases, there are many difficulties involved in formation of optimum root canal. Therefore, in order to solve the above mentioned problems, new developments in methods of root canal preparation and equipments for such purposes were made. Recently, vigorous studies about newly introduced engine-driven nitckel-ti-tanium rotary file are conducted. As shown in research results to dates, it is well established that the use of nickel-titanium file is better suited for curved root canal than stainless steel file in maintaining the curvature of root canal and reducing the deformation of root canal. However, it is also acknowledged that there are a few discrepancies in research results according to protocol, due to failure to remove variables in experiments. In addition, although it is recommended by the manufacturer that the GT rotary file should maintain a low rotational speed of 150∼350rpm and 'light pressure' as light as not to break the lead of a pencil, academic studies about the vertical force which is not yet standardized are not sufficiently explored. Therefore, this research devised and utilized a special research equipment to standardize the appropriate range of vertical force for GT rotary file through experiments by breaking of the lead of a pencil as expressed by the manufacturer and to accurately measure factors involved through repeating and recreating the environment of root canal preparation. Forming nine experimental groups by varying the vertical forces (150g, 220g, 300g) and rpm (150rpm, 250rpm, 350rpm), the effects of changing vertical forces and rpm on working efficiency were measured in terms of time expended in root canal preparation by crown-down method using a transparent resin block with 35 degree curvature and GT rotary file (z-test). The following research using this special research equipment that involved nine experimental groups and varying the vertical force for root canal preparation from 300g which is within the normal vertical force range to 700g and 1000g which fall outside the normal rpm range. The results were as follows : 1.Analysis of the experiment results revealed that the tome spent in root canal preparation decreased as the vertical forces and rpm increased (p<0.05). Also, the effects of rpm were greater than those of the vertical forces within the normal vertical force range (β-weight test) . 2.Observation of the deformation of GT rotary file revealed that deformation increases in a direct correlation with the vertical force increase and in a reverse correlation with the rpm decrease, In the case of the vertical forces close to the normal range, the probability of GT rotary file deformation were quite different depending on the rpm changes. In the case of◎eater tier◎cal forces, the occurrences of deformation of the file were more frequent regardless of the rpm changes. 3.Deformation and breakage of file were also commonly observed in the expended time measurement experiments and GT rotary file deformation experiments in which low speed rpm (150rpm) was used and at the curved portion of the resin block. Key words : GT rotary file, Crown-down method, Working efficiency, Vertical force, Rpm, Deformation and breakage of file

병원단위의 임상진료지침 개발과정

신영수,김창엽,오병희,한규섭,윤병우,한준구,강영호 한국의료QA학회 1997 한국의료질향상학회지 Vol.4 No.1

Background : With increased concerns about variation among physician a practice pattern and their impact on the quality of care, clinical practice guidelines have been developed by many different organizations, with differing aims and incentives. From the same point of view, there is growing interest in the development of clinical practice guidelines in Korea, but with only a few examples. As a result, there is not much exploration on the incentive and barrier to development guidelines as well as description on the development process. The purposes of this study are to describe the process of the four different clinical practice guidelines in a hospital setting, and to identify incentives and barriers in the development of guidelines. Methods : For this research, a clinical practice guideline development committee and four clinical practice guideline development teams were organized in a university hospital which has more than 1,200 beds. Twenty eight doctors, three nurses, and one technician participated as members of development teams for eight months. Four to six meetings were held, and three to seven departments in the hospital were involved. Results : The topics which developed into clinical practice guidelines were cardiopulmonary resuscitation(CPR), blood transfusion, anticoagulation, and angiography. The main goals set by teams were education(CPR, angiography), risk management(blood transfusion), and to enhance quality of care(anticoagulation). Among four teams, only in the team for anticoagulation guideline medical record review and pilot-testing were performed. Also literature review was not carried out systematically. However, all the guidelines were developed by multidisciplinary participation by personnels of related departments. All the team expected guidelines to be used as standard protocols in the practice. Conclusion : Experience and skill in developing process has to be improved to have a more valid and useful practice guideline. In particular, literature review and problem identification by examining medical record should be emphasized. Also further studies of the clinical outcomes of the guidelines application and changes in physicians behaviors would be required.

ROHC 압축 기법을 이용한 SCTP 헤더 압축

신병철,송희옥 충북대학교 컴퓨터정보통신 연구소 2006 컴퓨터정보통신연구 Vol.14 No.2

본 논문에서는 무선을 포함한 패킷 전송에서의 효율성을 위해 차세대 전송 계층 프로토콜인 SCTP에 ROHC(RObust Header Compression)를 적용한 ROHC 프로파일 7(ROHC-SCTP)방식을 제안한다. 제안된 ROHC-SCTP는 SNR(Sequence Number ROHC)-SCTP의 1 또는 2 바이트 길이의 새로운 필드를 SCTP 패킷 헤더에 추가하여, SCTP 멀티 스트림을 acknowledgement 스트림과 data 스트림으로 나누어 헤더 압축을 하며, 동기화 손실이 발생한 경우 context를 복구하는데 사용될 수 있도록 설계되었다. ROHC-SCTP의 제안을 통해 SCTP 헤더의 오버헤드 율을 최대 25% 까지 감소할 수 있으며 대역폭 또한 최대 5% 정도 절약할 수 있다. In this paper, we propose a new profile, ROHC(RObust Header Compression) profile 7, for SCTP with ROHC for applying robust header compression SCTP, which is a transport layer protocol. The proposed new profile 7 adds a new field of 1 or 2 byte size on the existing SCTP packet header, which can make the SCTP stream to be divided into acknowledgement stream and data stream. In addition, the classification of the stream can be used for recovering fault context. Consequently, in case that the proposed ROHC-SCTP is used, it is possible to reduce the SCTP header overhead rate and the bandwidth can also be saved.

한국인 성인 남성 폐쇄성수면무호흡 환자의 측모 두부 방사선계측학적 비교

황상희,박인숙,남기영,김종배,조용원,서영성,안병훈,박신구,박효상 대한치과교정학회 2008 대한치과교정학회지 Vol.38 No.3

본 연구는 비만도에 따른 한국인 남성 폐쇄성수면무호흡 환자의 측모 두부 방사선계측학적 특성을 파악하기 위하여 시행되었다. 이를 위하여 계명대학교 의과대학 동산의료원 수면클리닉에 수면장애를 주소로 내원하여 수면다원검사 후 치과에서 측모 두부방사선계측사진 촬영을 한 87명의 성인 환자들을 체질량지수(BMI)와 수면무호흡지수(AHI)에 따라 비비만 단순코골이군(Non-obese, simple snorers), 비만 단순코골이군(Obese, simple snorers), 비비만 수면 무호흡군(Non-obese, OSA patients), 비만 수면무호흡군(Obese, OSA patients)의 4군으로 나누어 비교하였다. 그결과, 4군 중 비만 수면무호흡군의 수면무호흡지수가 가장 컸으며, 비만 수면무호흡군보다 비비만 수면무호흡군의 하악각이 더 크고 혀 길이는 더 작았다. 또한, 비비만 수면무호흡군보다 비만수면무호흡군의 설골이 더 전하방에 위치하였고, 수면무호흡지수에 영향을 미치는 기여 인자는 비만 수면무호흡군에서는 혀 길이, 비비만 수면무호흡군에서는 설골의 후방위치였다. 이처럼 비만 수면무호흡 환자와 비비만 수면무호흡 환자의 측모 두부방사선계측학적 특성과 기여 인자가 다르게 나타나므로, 치료방법도 따라서 다르게 선택해야 할 것이다. 비만 수면무호흡 환자들에게는 먼저 체중감량이 권고되어야 할 것이고, 비비만 수면무호흡 환자들은 폐쇄부위에 따라 구강 내 장치나 Nasal CPAP (continuous positive airway pressure), UPPP (uvulopalatopharyngoplasty) 등이 추천될 수 있을 것이다. Objective: The purpose of this study was to compare the cephalometric measurements of obese and non-obese Korean male patients with obstructive sleep apnea syndrome (OSA). Methods: Eighty-seven adults who had visited the Sleep Disorder Clinic Center in Keimyung University, Daegu, Korea were examined and evaluated with polysomnography (PSG) and lateral cephalogram. They were divided into 4 groups (non-obese simple snorers, obese simple snorers, non-obese OSA patients, obese OSA patients) according to AHI (Apnea-Hypopnea Index) and BMI (Body Mass Index). Results: The obese OSA group had the highest AHI among the 4 groups. The non-obese OSA group had a significantly steeper mandibular angle and shorter tongue length than the obese OSA group. The hyoid bone of the obese OSA group was positioned anterior and inferior as compared with the non-obese OSA group. Multiple regression analysis showed that tongue length in the obese OSA group and retroposition of hyoid bone in the non-obese OSA group were significant determinants for the severity of AHI. Conclusions: From a cephalometric point of view, the obese and non-obese pateints with OSA may be characterized by different pathogeneses. Therefore, they have to be managed by individualized treatment. For the obese OSA patients, weight control must be advised as a first choice and for the non-obese OSA patients, oral appliance, nasal CPAP, UPPP and others could be chosen according to the obstructive sites.

주제정의검사(Defining Issues Test)를 사용한 비행청소년의 도덕발달에 대한 연구

박병희,장경준,신지용 大韓神經精神醫學會 1996 신경정신의학 Vol.35 No.3

본 연구는 Rest가 고안하고 문용린이 번안한 주제정의검사(DIT)를 사용하여 청소년기의 도덕발달수준을 알아보고 비행청소년의 도덕발달수준과 비교하여 그 차이점에 대해 알아보고자 하였다. 먼저 신지용 등(1995)이 정상 고교생군에 대해 조사하였고 본 논문에서는 비행청소년군의 조사와 두 군의 비교 분석을 통해 청소년기의 도덕발달수준과 관련된 변인의 유의성을 검증하였다. 연구대상은 정상 고교생군 254명과 비행청소년군 285명이었다. 설문지 작성시 문항에 대한 이해 부족으로 생기는 오차를 줄이기 위하여 자세한 설명과 연습을 실시하였고 충분한 시간이 주어지도록 하였다. 수집된 자료는 컴퓨터로 채점되었으며 정상군의 자료와 함께 분석되었다. 연구의 결과는 다음과 같이 요약할 수 있다. 1) 정상 고교생군에 비해 비행청소년군은 도덕발달수준이 유의하게 낮게 나타났다(p<0.05). 2) 비행청소년군의 경우 종교에 따라 도덕발달수준의 유의한 차이를 보였으며 이는 천주교와 불교간의 수준차이로 검증되었다. 3) 정상고교생군과 비행청소년군의 PM점수 차이의 상관관계 분석 결과 아버지, 어머니의 교육수준 요인에서 주효과가 유의하게 나타났으며 주성장지는 상호작용 효과에 유의한 것으로 나타났다. Objectives : This study was directed to compare the moral developmental levels between normal and delinquent adolescent groups. And the authors also intended to find the demographic variables that influence the differences of moral levels between two groups. Methods : Defining Issue Test questionnaires were applied to 285 delinquent adolescents and the data were compared and analyzed with the normal control data of previous Shin's study(1995). Results : 1) The PM scores(scores of principled morality) of delinquent group(28.6±15.01) was significantly lower than that of normal control group, 41.8±15.10(p<0.05). 2) The PM scores were not significantly different according to the age in delinquent adolescents. 3) The PM scores were significantly different according to the religious varible, especially between Catholic and Buddhism in the delinquent adolescents. The Catholic group recorded the highest and Buddhism, the lowest. 4) Comparing the scores between normal and delinquent adolescents, there were significant differences according to the educational of mother and father, and the birth places. Conclusion : The moral developmental process of adolescents requires the proper education from parents, school, religion or other social environment. The corrective reexperience of normal developmental steps are needed especially to the delinquent adolescents.

증발과 응결에 대한 국민 학생들의 개념 조사

최병순,김효남,강순희,신인철 한국교원대학교 과학교육연구소 1993 청람과학교육연구논총 Vol.3 No.1

The purpose of this study was to investigate and analyze the conception of elementary school students on evaporation and condensation, and then to verify the types of the conception. Forty-eight children from six elementary schools were sampled by stratified random sampling in Seoul and other provinces. They responded to the questionaire and the interview. This study was carried out according to the process of the basic study, the preliminary study, and the main study. The materials collected were classified and analyzed according to the types of children's ideas. The findings of this study were as follows: 1. The vocabulary used to describe the evaporation phenomena varied according to the situations, and the scientific term "evaporation" was more frequently used by the older groups. 2. Most children answered that the last location of water were air/sky/cloud. Air/cloud which represents the scientific conception of the location of water were mentioned by children of all ages. The higher the grade of the children were, the more scientific conception the children mentioned, however. 3. Most children referred to the heat as the factor of evaporation. Wind, on the other hand was mentioned by less than 10% of lower graders, and by about 30% of higher graders. 4. The result of asking children whether they thought it was possible to get the evaporated water back showed that about 70% of lower graders denied the possibility of the water being reversible. About 60% of higher graders, however, recognized that the water will be returned as rain or condensation. This increase may be associated with formal teaching of water cycle. 5. In the ideas of evaporation and condensation, some of the children have supernatural ideas and animism, which are most younger chilren's characteristics.

반건식-백필터에 의한 소각배가스 중의 HCI, SOx 제거 (Ⅰ)

배병훈,신남철,고경숙,김춘희,문종익,임경택 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.1

This study has been carried out to investigate the removal efficiencies of HCl/SOx in a Spray-Dryer/Fabric-Filter system. In HCl/SOx removal, we could identify the key factors such as spray dryer outlet temperature, molar equivalence ratio(MER) and fabric filter velocity, but we couldn't find out the correlation of HCl and SOx. The removals of HCl/SOx were inversely proportional to spray dryer outlet temperature(l30~170℃) and filter velocity(l.0~1.5 m/min), at the MER, HCl removal efficiency was strongly proportional to MER, but SOx, removal efficiency was not particularly increased by MER over 1.5. The removal efficiencies of HCl/SOx were improved over 10% at the fabric filter. In this Spray-Dryer/Fabric-Filter system, HCl/SOx removal efficiencies were about 99%, 96% respectively.