플라즈마 표지소자의 제작

이상윤,라병욱,박동수,황인헌,이덕동,신영남,박성배,이동욱,박용석,박형근,손상호,권태근,채경락,정경득 慶北大學校 自然科學大學 1986 自然科學論文集 Vol.4 No.-

An Ac-type Plasma Display Panel (PDP) operating with Ne-Ar(0.1%) Penning mixture gas is fabicated. The characterics of the panel with electrodes covered with thin and thick dielectric layers are studied. The brightness of the Neon-orange light emitted by the panel measured as function of applied voltage and frequency. As an application, a graphic display system equipped with PDP showing still and moving pictures is made.

스테이지 이동 반력에 의한 베이스 진동 저감기법 개발

박아영,김형기,권오영,홍성욱 한국공작기계학회 2009 한국공작기계학회 춘계학술대회논문집 Vol.2009 No.-

A variety of precise stages are adopted for precise machinery. To secure vibration isolation, those precise stages are mounted on a heavy base structure supported by compliant springs. Then the base structure is often subjected to vibration due to the reaction force induced by the stage motion. This paper investigates the dynamic behavior of base structures as well as a vibration reduction technique. A 6 DOF dynamic model is established to investigate the vibration of positioning stage and base structure. A new input shaper is devised to eliminate both the residual vibrations in base structure. Simulations show that the proposed input shaper effectively remove the residual vibrations in base structure.

일부 도시지역 노인의 건강관련 실천과 신체활동기능에 관한 연구

권순범,김공현,김병성,박형종 대한보건협회 1994 대한보건연구 Vol.20 No.2

본 연구는 65세이상 노인들의 보건 관련 행태와 일상생활 활동능력을 파악하고, 이들의 일상생활 활동능력과 관련된 요인들을 규명하여 노인들의 건강의 유지와 증진에 도움이 될 수 있는 보건사업을 개발하고 시행할 때 필요한 기초자료를 제공할 목적으로 실시되었다. 연구대상은 경상남도 마산시 합포구 월영 1동에 거주하는 65세 이상의 노인 가운데서 보건소에서 실시하는 순회진료에 응했거나 보건요원의 가정방문시 면담에 응해준 182명의 노인들이었다. 연구는 1994년 3월 2일부터 4월 8일까지 현지조사가 실시되었으며, 구조화된 설문지를 가지고 시행된 면담과 방사선촬영검사 및 이학적 검사, 그리고 의사외 진찰 등이 병행 실시되었다. 수집된 자료는 SPSS/PC^+ Program을 이용하여 각 변수의 도수와 상대도수를 산출하였고, Chi-square로 검증하였다. 연구결과에 의하면 노인들의 건강 관련 행태, 주관적 건강평가 수준, 일상생활 활동능력, 그리고 앓고있는 질환등에 차이가 많이 있었다. 따라서 노인보건사업을 개발하거나 시행할 경우에는 이러한 것들에 기초를 두어야 할 것으로 판단되었고, 또한 노인의 건강 관련 행태나 일상생활 활동능력에 관한 연구도 이같은 횡단면적 연구만으로 그칠 것이 아니라 코호트 연구를 통하여 보다 심층적 부분에 대하여 연구가 이루어져야 할 필요가 있을 것으로 사료되었다. This study was carried out to find out general characteristics and health-related behaviors of elders aged 65 or over and factors related to their activities of daily living, and thus to contribute to their health maintenance and promotion. The subjects were 182 elders who had resided at Woelyoung-1 dong, Masan-city and participated in this study voluntarily. To collect data for the study, the field survey was conducted from March 2 to April 8, 1994 with a structured questionnaire by trained nurses and the investigator, and physical, clinical and radiological examinations for most of subjects were made of. Univariate and multiple regression methods were employed for data analyses by use of SPSS/PC^+ program. The major findings were as follows: 1. 74.2% of the subjects were 65-74 years old, while 25.8% were 75 years old or over. 40.7% of them were illterate, 27.5% could read and write Korean, 26.9% graduated from elementary school, and 4.8% middle school or higher level. 2. 1.7% of men and 7.3% of women perceived their current health status as excellent, 44.8% of men and 17.7% of women as good, 51.7% of men and 72.6% of women as fair, and 1.7% of men and 2.4% of women as poor. In genral elderly men perceived their health status better than elderly women. Among the subjects, 55.2% of men and 70.2% of women reported that they experienced one or more illnesses during the last year. 3. 55.2% of men and 30.6% of women were current smokers. 53.1% of current male smokers smoked 11-20 cigarettes per day and 60.5% of current female smokers smoked less than 10 cigarettes per day. 4. 58.6% of men and 25% of women drank alcohol currently. 79.4% of current male drinkers and 38.7% of current female drinkers drank once or more per week. 5. 46.6% of men and 25.8% of women practiced regular excercises for their health maintenance and promotion. 6. In general, 39.6% of the subjects needed other's assistance for doing one or more activities such as doing heavy home work, walking up and down stairs or walking half a mile. And 13.2% of them needed other's assistance for doing one or more activities such as walking across a small room, bathing, grooming, dressing, eating and getting up. It showed that the more elders' age incresed, the more they needed others' assistance. 7. Common diseases of the subjects were hypertension, degenerative arthritis, chronic pulmonary disease, diabetes mellitus, chronic renal disease, and cerebrovascular accident in order. 8. Among the factors influencing activities of daily living of the subjects, age, diastolic blood pressure, and serum uric acid, as independent variables, explained 24.7%, 4.0% and 2.2% of required assistances, as a dependent variable, in activites of daily living, respectively. In conclusion, it is suggested that when health services for elders are planned, it is necessary to consider the findings of this study. And it is also desirable to conduct this type of studies in-depth with a sample cohort.

유전체의 과도 산란 해석을 위한 시간영역 결합 적분방정식

박재권,김형진,윤희상,정백호 湖西大學校工業技術硏究所 2003 工業技術硏究所論文集 Vol.22 No.-

In this paper, we propose a time domain combined field integral equation (TD-CFIE) formulation to analyze the transient electromagnetic response from three-dimensional dielectric objects. The solution method in this paper is based on the method of moments(MoM) that involves separate spatial and temporal testing procedures. A set of the RWG(Rao, Wilton, Glisson) functions is used for spatial expansion of the equivalent electric and magnetic current densities and a combination of RWG and its orthogonal component is used as spatial testing. We also investigate spatial testing procedures for the TD-CFIE to select the proper testing functions that are derived from the Laguerre polynomials. These basis functions are also used for temporal testing. Numerical results computed by the proposed formulation are presented and compared with the solutions of the frequency domain combined field integral equation(FB-CFIE).

최근 6년간 연세의료원에서 경험한 한국인 안면골 골절에 대한 임상적 연구

권준호,이충국,이의웅,민우석,윤중호,박형식 大韓顎顔面成形外科學會 1989 Maxillofacial Plastic Reconstructive Surgery Vol.11 No.1

This is a series of continuing research on facial bone fractures of Koreans worked by Dept. of Oral and Maxillofacial surgery, Dental College of Yonsei University, Seoul, Korea, since 1972. The study was based on a series of 630 patients with facial bone fractures treated as in patient at Yonsei Medical Center, Yonsei University, during the period of Jan. 1982 through Dec, 1987. The results obtained are as follows: 1. The ratio of Men to Women was 4.3 : 1, and admissions for facial bone fractures have been increased year after 1984. 2. The age frequency was highest in the third decade(38.3%). and fourth, second, fifth decade in orders. 3. The traffic accident was the most frequent cause of facial bone fractures(51.3%). 4. The most common location of facial bone fractures was the Mandible(35.3%), and Zygoma complex(29.8%), Nasal bone(15.0%), Maxilla(11.0%) were next in order of frequency. 5. In 291 patients of Mandible fractures, 226(77.7%) had fractures only in Mandible and 65(22.3%) had another facial bone fractures. The most frequent fracture site of mandible was the Symphysis(43.0%) and Angle(22.4%), and Simple fracture was the most frequent in type of fracture(66.9%). Intermaxillarty fixatin & Open reduction was major method of treatment(36.9%). 6. In 394 patients of Midface fractures 323(82.0%) had fractures only in Midface and 71(18.0%) had another facial bone fractures. The most frequent site of Midface fractures was zygoma complex & zygomatic arch(42.7%), and Simple fracture was the most common type of fractures. Observation(Maxilla :44.2%, Zygoma :51.0%) and Open Reduction(Maxilla :20.0%. Zygoma :23.5%) were the major method of treatment. 7. The frequency of Nasal bone fracture was about 1/5 of Midface fractures, and Closed Reduction(42.2%) was the major method of treatment. 8. The complication was reported in only 16 patients, and Malunion was the major complication. 9. Head(44.4%), Lower extrimities(14.5%) and Eye(12.3%) were injured commonly with facial bone fractures. 10. The elapsed time from injury to hospital was within 24 hours in 73.8% of patients, however 15.5% of patients arrived the hospital 72 hours after injury.

총체적 언어중재가 다운증후군 아동의 발화에 미치는 효과

권형지,박선희,강수균 대구대학교 특수교육재활과학연구소 2005 특수교육재활과학연구 Vol.44 No.3

본 연구는 총체적 언어중재가 다운증후군 아동의 발화 자율성의 증가, 의사소통 의도의 변화, 그리고 전반적 언어능력이 향상되었는지를 알아보고자 하였다. 이를 위하여 생활연령이 9.9~13.2세 범위이고, 약물 복용이나 다른 신체적 장애가 없는 다운증후군 아동 3명을 대상으로 언어중재를 실시하였다. 이를 위하여 사전 - 사후 설계를 적용하였고, 사전 평가 단계, 중재 단계, 사후 평가 단계의 과정으로 실시하였다. 본 연구의 결과 첫째, 총체적 언어중재가 다운증후군 아동의 발화에서 발화의 자율성이 증가되었다. 둘째, 총체적 언어중재가 다운증후군 아동의 발화에서 의사소통 의도가 변화되었다. 셋째, 총체적 언어중재가 다운증후군 아동의 전반적 언어능력을 증가시켰다. 이상과 같은 결과를 바탕으로 총체적 언어중재가 다운증후군 아동의 언어능력에 긍정적인 영향을 미쳤다는 것을 알 수 있다. The purpose of this study was to examine the effect of a whole language intervention in the utterance development in children with Down syndrome. Three boys with Down syndrome, who were in the range of 9.9 years to 13.2 years old, participated in the study. None of subjects showed visual, hearing, emotional, and/or behavioral problems besides Down syndrome. To investigate each subject's language ability, 3 examination tools were administered: The production of voluntary utterances, the variety of conversational intension, and the Preschool Receptive-Expressive Language Scale(PRES). This study used pre-post treatment design. The results of study were as follow: First, the whole language intervention improved the subjects' mean of production of voluntary utterances. Secondly, the whole language intervention improved the subjects' mean of variety of conversational intension. Thirdly, the whole language intervention improved mean of the overall language development for all the subjects. As described above, the whole language intervention improved semantic, syntactic, pragmatic ability of language for all the subjects.

광섬유 ROTDR 센서를 이용한 사회기반시설물의 보안에 관한 연구

박형준,고광락,권일범 한국비파괴검사학회 2003 한국비파괴검사학회지 Vol.23 No.2

광섬유 ROTDR(Rayleigh optical time domain reflectometry) 센서를 이용하여 중요 보안 대상체인 사회기반시설물에 침투하는 침입자의 위치와 무게 정도를 탐지할 수 있는 기초 연구를 수행하였다. 넓은 면적을 감지할 수 있는 매설형 광섬유 센서탐지판을 제작하고, 인가된 침입물체의 위치와 무게에 따른 신호특성을 고찰하였다. ROTDR 센서는 펄스 폭이 30 ㎱이고, 광섬유의 길이는 10㎞ 이상이다. 위치탐지오차는 약 3m 이내였으며, 무게에 따른 탐지능력은 20kgf, 40kgf, 60kgf의 세단계를 구분할 수 있음을 알 수 있었다. A detection technique is studied to determine the location and the weight of an intruder into infrasturcture using fiber optic ROTDR(Rayleigh optical time domain reflectometry) sensor. Fiber optic sensing plates buried in sand are prepared to measure the intruder effects. The signal of ROTDR was analyzed to confirm the detection performance. The constructed ROTDR system could be used up to 12 ㎞ at the pulse width of 30 ㎱. The location error was less than 3 m and the weight could be detected into three levels of grade, such as 20 kgf, 40 kgf and 60 kgf.

치성낭종으로부터 유래된 편평상피세포암종 : Report of a Case & Review of Literatures

권혁진,현재훈,박형국,김용각 大韓顎顔面成形再建外科學會 1997 Maxillofacial Plastic Reconstructive Surgery Vol.19 No.2

Odontogenic cysts are relatively common pathologic lesions found in the oral and perioral structures, but the case of squamous cell carcinoma arising from those cysts are very uncommon. After first reported of that case in 1889 by Herman, Schwimmer collected 56 cases of previously reported squamous cell carcinoma arising in residual odontogenic cyst during about past one century. More than 60% of cases of carcinoma developing in odontogenic cysts arising in inflammatory periapical or residual cyst, and these tumors are usually well-differentiated with relatively good prognosis, and often are diagnosed as benign lesion in radiographic or clinical examination, therefore definitive diagnosis must be made by histologic examintation. We report a case and review the literatures, in our case, 78-year old woman were clinically and radiographically diagnosed as residual odontogenic cyst. But in histologic examination after enucleation of lesion, mass of squamous cell carinoma were observed, but in other area, typical cyst wall and lining epithelium were observed. And in some area, carcinoma in situ and invading squamous cell carcinoma into the lining epithlium were also observed.

만성폐쇄성폐질환의 중증도와 폐고혈압 및 폐성심으로 진행과의 상관관계

김형호,박철진,이준,장광표,하성일,이재록,하재화,권세훈,권용운,윤성호,이승일 朝鮮大學校 附設 醫學硏究所 2007 The Medical Journal of Chosun University Vol.32 No.2

Background: From many previous studies, Pulmonary hypertension is the known independent predictive factor of the mortality in COPD. Also pulmonary hypertension is the major cardiovascular complication of COPD and is associated with the progression to cor pulmonale and poor prognosis. Author want to analyze the correlation between pulmonary hypertension and the severity of COPD which are classified by forced expiratory volume in one second, and the extent of progression to corpulmonale. Methods: Retrospectively we investigated the medical records of 118 patients with COPD who had pulmonary function test and echocardiogaphy more than one times during one-year follow-up (from June, 2005 to May, 2006) at respiratory division in chosun university hospital, and then 50 patients were enrolled in this study. We classified the severity from FEVl in pulmonary function test based on the GOLD guideline, also this was comparably analyzed with RVSP, RVIDd, Visual Grading from echocardiography. Results: 16 patients out of 50 were classified as moderate severity, 25 patients were severe, and 9 patients were very severe group. RVSP was higher in more severe groups than less severe groups but when it comes to pulmonary hypertension that RVSP is over 35 mmHg, there was no valid difference lies in those groups. As FEVl decreases RVSP and RVIDd increases, and observed relationship between RVSP which was classified as below 35 mm and above 35 mm groups and visual grading which was classified as normal and dilatated groups revealed valid correlation, Conclusion: As pulmonary function decreases, progression to pulmonary hypertension and cor pulmonale increases but there was no remarkable difference of prevalence in above moderate severity groups. 연구배경 폐고혈압은 이전의 많은 연구에서 만성폐쇄성폐질환에서 독립적인 사망의 예측인자로 알려져 있다. 또한 폐고혈압은 만성폐쇄성폐질환의 주요한 심혈관계 합병증이며, 폐성심으로의 진행 및 불량한 예후와도 관련되어 있다. 이에 저자는 폐고혈압과 1초간 노력성호기량으로 분류되는 만성폐쇄성폐질환의 중증도 및 폐성심으로의 진행 정도를 비교 분석하여 이들의 상관관계를 밝혀보고자 한다. 방법 2005년 6월부터 2006년 5월까지 1년 동안 본 병원 호흡기 내과에서 폐기능검사와 심장초음파 검사를 각각 1회 이상 시행한 적이 있는 118명에 한하여 의무기록을 후향적으로 조사하여 이 중에서 50명을 대상으로 하였다. 폐기능검사 시행 결과 얻은 1초간 노력성호기량을 바탕으로 GOLD guideline에 따라 중증도를 분류하였으며 이를 심초음파 시행 결과 얻은 우심실수축기압, 확장기말 우심실내부간격, 시각등급과 비교분석하였다. 결과 대상 환자 50명중 16명은 중등증, 25명은 중증, 9명은 최고중증 그룹으로 분류되었다. 우심실수축기압은 중증도가 높은 그룹에서 낮은 그룹에 비해 더 높게 나타났으나 폐고혈압에 해당하는 우심실수축기압이 35 mmHg이상인 환자에 있어사는 각 그룹간에 유의한 차이를 보이지 않았으며, 확장기말 우심실내부간격, 시각등급 또한 중증도와 유의한 차이를 보이지 안항ㅆ다. 1초간 노력성호기량이 감소함에 따라서는 우심실수축기압, 시각등급은 증가하였으며 우심실수축기압을 35mmHg 미만과 이상인 그룹으로, 시각등급을 정상과 확장이 있는 그룹으로 분류하여 비교한 결과에서는 유의한 상관관계를 나타냈다. 결론 폐기능이 감소할수록 페고혈압 및 폐성심으로의 진행이 증가하였으나 폐기능검사에서 중등도 이상의 그룹에서 유병률의 차이는 크지 않았다.

산화물 반도체 가스 센서 어레이와 패턴 인식기술을 이용한 가스 인식

홍형기,윤동현,권철한,박현수,신현우,이규정 경북대학교 센서기술연구소 1994 센서技術學術大會論文集 Vol.5 No.1

In order to identify C_(2)H_(5)OH, (CH_(3))_(3)N and CH_(3)SH gases, a gas recognition system using gas sensor array and pattern recognition technique has been fabricated. The sensor array consists of four thick film oxide semiconductor gas sensors whose sensing layers are Pt-doped SnO_(2), Pd-doped SnO_(2), Pd-doped ZnO and Pd-doped WO_(3). Three kinds of pattern recognition techniques such as principal component analysis (PCA), discrimination analysis (DA) and back propagation (BP) were used for the discrimination of gas species. The identification of C_(2)H_(5)OH, (CH_(3))_(3)N and CH_(3)SH gases has been successfully demonstrated.