생쥐의 심장발생과정에서 세포증식과 세포고사의 역할

김어진,김효수,서정욱,김어진,김효수,서정욱 대한병리학회 1998 Journal of Pathology and Translational Medicine Vol.32 No.12

Optical Properties of Planar Lighting

정효수 水原大學校 2016 論文集 Vol.30 No.-

This paper presents a concept for a planar light source utilizing Cs3Sb as flat electron emitters. The design concept of the devices with a diode structure was that the photocathodes were to be operated in a reflective mode. Commercially available P-22 phosphors were used as a light source of desirable wavelengths. Light emission from the devices was induced by photoemitted electrons, accelerated by an anode electric field that was shielded from the photoemitter surface. The optical properties of the devices were investigated by measuring the optical parameters as functions of applied anode voltages. The results showed the possibility to produce a more directable and easily controllable stream of light. These make the devices suitable for a variety of planar lighting applications.

Luminous Properties of Planar Lighting Devices Using Cs3Sb Photocathodes

정효수 水原大學校 2015 論文集 Vol.29 No.-

The Cs3Sbphotocathodewasformedby non-vacuum process technology and successive in-situ photocathode vacuum device fabrication was carried out in a process chamber. Performance test of the device was followed. Light emission from the devices was induced by photoemitted electrons, accelerated by an anode electric field that was shielded from the photoemitter surface. The luminescent characteristics of the devices were investigated by measuring the optical parameters as functions of applied anode voltages. The results showed the possibility to produce a more directable and easily controllable stream of light. These make the devices suitable for a variety of planar lighting applications.

소아에서 Fogarty 카테터를 이용한 일측폐 환기 마취 경험

유수봉,강효석,임지훈,김두식,류시정 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.3

Thoracic surgery may be greatly facilitated by causing selective atelectasis of the lung being operated on (one-lung ventilation anesthesia). But the tube used for one-lung ventilation is greater outer diameter than conventional endotracheal tube when compare to each other with same inner diameter, so in some young children it is impossible to one-lung ventilation using double lumen tube or bronchial blocker tube because of narrow vocal cord. We performed one lung ventilation anesthesia using conventional endotracheal tube and Fogarty catheter as a bronchial blocker in 11-year old women who received lung biopsy surgery and left lower lobectomy.

포토캐소드를 이용한 발광소자 제작에 관한 연구

정효수 水原大學校 2014 論文集 Vol.28 No.-

상압에서 제조된 포토캐소드(photocathode)를 이용하여 진공소자를 제작하였다. 발광을 위하여 양극기판에 R, G, B 형광체를 도포하였다. 제작된 진공 발광소자에 전압을 인가하여 밝기, 소모전력, 효율 등 발광특성 및 성능을 평가하였다. 전압인가 방식으로는 전류제한이 없는 high power mode와 전류를 제한하는 low power mode를 적용하였다. 전자방출을 유발하는 광원으로는 가시광 영역인 450 nm의 청색 LED 면광원을 사용하였다. 상압에서 제작된 포토캐소드는 전자방출 특성에서 높은 전류밀도와 장기적인 안전성을 나타내었다. 일반적인 포토캐소드 제조와 비교할 때 제작공정이 단순하여 저렴하게 제작할 수 있고, 선택적인 가시광영역의 광원에 감지도가 좋은 특성을 그대로 나타내었다. 제작된 면발광소자는 전압인가 방식에 따라 밝기, 전력소모, 효율 등에서 분명한 차이를 나타내었다. 이것은 응용분야에 적합한 밝기와 전력소모, 효율 등을 선택할 수 있다는 것을 의미한다. 측정된 값은 광원으로 사용하기에 충분한 평가지표를 나타내었다. 따라서 포토캐소드 면발광소자는 일반광원뿐만 아니라 UV 면광원과 같은 첨단 광원개발에 응용될 수 있을 것으로 보인다. 또한, 포토캐소드의 상압 공정기술은 전자원 뿐만 아니라 일반적인 전자소자에도 응용할 수 있을 것으로 보인다.

Fabrication of planar lighting devices utilizing Cs3Sb flat emitters

정효수 水原大學校 2018 論文集 Vol.32 No.-

Non-vacuum process technology was used to produce Cs3Sb photocathodes on substrates, and in-situ panel devices were fabricated. The performance of the devices was characterized by measuring the anode current as functions of the devices’operation times. An excitation light source with a 475-nm wavelength was used for the photocathodes. The device has a simple diode structure, providing unique characteristics such as a large gap, vertical electron beam directionality, and resistance to surface contamination from ion bombardment and poisoning by outgassing species. Accordingly, Cs3Sb photocathodes function as flat emitters, and the emission properties of the photocathode emitters depend on the vacuum level of the devices. An improved current stability has been observed after conducting an electrical conditioning process to remove possible adsorbates on the Cs3Sb flat emitters.

Fabrication of a planar UV lighting device utilizing Cs3Sb emitters

정효수 水原大學校 2017 論文集 Vol.31 No.-

Planar UV light sources with uniform intensity are ideal for UV treatments. A newly conceived planar UV lighting device utilizing Cs3Sb mono-alkali antimonide photocathodes as flat electron emitters is here presented and analyzed. The design concept involves a panel device that utilizes photocathodes operated in a reflection mode with an external excitation light source. The excitation light source is in the blue visible light range. Commercially available UV phosphors are used as a light source of desirable UV wavelengths. The light emission characteristics of the device are investigated by measuring the optical parameters as functions of applied anode voltages. The UV light emission shows that cold UV light with the spectral characteristics of near-monochromatic distribution are most effective. It also demonstrates that the UV intensity is sufficient for the UV treatment. More importantly, the planar UV lighting device is mercury free. These make them suitable for all UV applications.

구강악안면 외상환자의 조직손상의 양상 및 정도에 관한 임상적 연구

신효근,소병수,안태섭,진우성,윤철희 大韓顎顔面成形再建外科學會 1995 Maxillofacial Plastic Reconstructive Surgery Vol.17 No.3

This is a clinical and retropective study on th patients with oral and maxillofacial trauma. This study was based on a series of 917 patients were treated as in-patients, at Chon-buk National University Hospital, during the period of Jan., 1989 through Dec., 1993. The results obtained were as follows : 1. The ratio of men to women were 3.59 : 1 in oral and maxillofacial injuries, 3.92 : 1 in facial bone fractures, and 3.18 : 1 in soft tissue injuries. 2. The oral and maxillofacial injuries occurred most frequently in the third decade(32.2%), and fourth, second, fifth decade in orders. 3. The major etiologic factors were traffic accident(57.4%) and fall-down(17.1%), interpersonal accident(16.6%), and industrial accident were next in order of frequency. 4. The incidence of facial bone fracture was 72.1%, soft tissue injury 58.8%, and dental injury 40.5%. 5. The most common site of fracture were mandible(62.9%) and maxilla(19.9%), zygoma and zygomatic arch(18.7%), and nasal bone(4.7%) were next in order of frequency. 6. The most common type of soft tissue injury was laceration(51.0%). The lesion of soft tissue injuries were mostly 1 or 2 lesions and deep.

수영장 소비자들의 사회성 수용과 생활만족의 관계

임효택,정명수,김철주,이강욱,유충완 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.4

The purpose of the present study is to investigate and analyze effects of aerobic dance training on housewives' life satisfaction. 270 subjects were selected from members at aerobic dance clubs in Kwangju. A questionnaire was used to collect the data. The data were analyzed with SAS 6.12 statistics package. The findings of the study were : 1. 65% of the subjects participated in the aerobic dance activities 4~5 days a week while 18.3% of the subjects participated every day. 2. 67.4% of the subjects participated in the aerobic dance activities for 30~50 minutes and monthly mean expenses were 30,000~50,000 won(56.1%). 3. In comparison of the housewives' general characteristics with the motive of participation in the aerobic dance activities, there were no significant differences. 4. According to the subjects's jobs, there were significant differences in the motive of participation. Especially, employees for management and administration had higher motive of participation(3.644). 5. In comparison of life satisfaction with the aerobic dance activities, all parameters(duration, periods, degree and existence of the activities) were related with the life satisfaction. 6. In case of participation for more than 5 years, more life satisfaction was observed.

Risperidone 조기 중단군 및 장기 유지군의 임상적 특성 비교

김광수,박원명,전태연,배치운,김대진,백인호,이철,김정수,한상익,최보문,장계호,고효진 大韓神經精神醫學會 2001 신경정신의학 Vol.40 No.3

연구목적 : Risperidone 투여후 조기 중단한 환자들과 장기적으로 계속 risperidone을 복용하고 있는 환자의 임상적 특성을 평가하고 나아가 risperidone장기 유지와 조기 중단의 요인을 분석하고 정신병리가 약물 투여에 미치는 영향을 조사하고자 하였다. 방 법 : 연구 대상자는 1996년 1월부터 1996년 12월까지 가톨릭대학교 의과대학 부속 8개 병원 정신과에서 risperidone을 투여 시작한 환자 580명중 DSM-IV기준에 의해 정신분열병으로 진단받고 투여 기간이 6개월 미만(조기 중단군)이거나 2년 이상(장기 유지군)을 경과하였으며 의무기록의 누락이 없는 210명을 선정하였다. 두 군간 임상적 특성을 조사하기 위하여 인구학적 변인, 정신병리학적 변인, 약물 투여기록 및 부작용 등을 과거 의무기록을 근거로 평가하였다. 결 과 : 대상환자 210명 중 조기 중단군이 67명(31.9%)이었고 장기 유지군은 143명(68.1%)이었으며 두 군간 인구학적 변인과 정신병리학적 변인에 따른 특징에는 두 군간 차이가 없었다. 두 군간 risperidone의 시작 용량과 변인과 정신병리학적 변인에 따른 특징에는 두 군간 차이가 없었다. 두 군간 risperidone의 시작 용량과 최대 용량은 유의한 차이가 없었으나 유지용량은 조기 중단군에서 4.49(±1.44)mg,장기 유지군에서 3.67(±1.50)mg으로 유의한 차이가 있었다(t=3.698, p<0.05). 또한, 이전 항정신병약물의 사용 기왕력 변인에서 조기 중단군은 기왕력이 없는 환자가 39명(58.2%), 고역가 항정신병약물을 사용한 기왕력이 있는 환자는 27명(40.3%), 저역가 항정신병약물을 사용한 기왕력이 있는 환자는 1명(1.5%)이었고, 장기 유지군은 기왕력이 없는 환자가 58명(40.6%), 고역가 항정신병약물을 사용한 기왕력이 있는 환자는 77명(53.8%), 저역가 항정신병약물을 사용한 기왕력이 있는 환자는 8명(5.6%)으로 유의한 차이가 있었다.(x²=6.559, df-=2, p<0.05). 결 론 : 본 연구결과에 의하면 가급적 환자 상태에 따라 낮은 최적 치료 용량을 투여하는 것이 장기잔의 투여를 바람직한 것으로 생각된다. 본 연구와 같은 대규모의 후향적 자연적 연구는 일반 실제 진료에서 risperidone의 효과 및 기타 다른 측면에서의 유용한 정보를 얻을 것으로 기대된다. Objective : This retrospective naturalistic study was designed to compare the clinical characteristics including psychopathology of two groups of patients, long-term maintenance group and short-term drop-out group, who were taking risperidone. Method : Datas were collected for 210 schizophrenic patients with complete medical records among 580 patients who were enrolled with risperidone administration from January 1996 to December 1996 in 8 affiliated hospital of the Catholic University. The short-term drop-out patients group were assigned to whom treatment period was less than 6 month, and the long-term maintained patients group, treatment period was more than 2 years. We assessed demographics, psychopathology, and other variables related with medication based on past medical records. Results : Among subjects of 210, short-term drop-out patients group were 67(31.9%) and long-term maintained patients group were 143(68.1%). Demographics and psychopathology were not significantly different between two groups. The stating and maximal dosage of risperidone was not significantly different between two groups but the maintenance dosage of risperidone was lower in long-term medicated patients group than short-term drop-out patients group(t=3.698, p<0.05). Additionally, the result of this study showed differences in experiences of past antipsychotic use as following. The number of no previous use of antipsychotic was 39(58.2%), the number of high potency amtipsychotic use was 27(40.3%), and the number of no previous use of antipsychotic was 58(40.6%), the number of high potency ntipsychotic use was 77(53.8%), the number of low potency antipsychotic use was8(5.6%) in long-term maintained group.(x²=6.559, df-=2, p<0.05). Conclusions : According to these results, administration of low therapeutic dosage should be recommended for long-term maintenance as if possible. Multi-center based retrospective naturalistic study like this would be useful for getting informations about efficacy and some other aspects of antipsychotic administration in practial field.