SR 버퍼할당 메카니즘에 관한 연구

박성헌,김훈,박세환,최현호,박광채 조선대학교 에너지.자원신기술연구소 1997 에너지·자원신기술연구소 논문지 Vol.19 No.2

Since services in ATM networks are very various and the characteristic of traffic from services is very different from each one, shared buffer mechanism, that shares only one buffer, cannot satisfy QoS, requirement for traffics. Furthermore, it has more difficulty in controlling composite cells in buffer when large ATM switch is implemented. In this paper, we propose cell service scheduling of separated routing allocation mechanism that allocates respective, independent buffer to cells with same traffic characteristic according to priority. We analyzed its performance using computer simulation. Then, we obtained cell loss probability changing buffer size and weighted value, when cell service scheduling is done by unsymmetrical round-robin depending on weighted value that is allocated to respective buffer.

스테로이드 주사를 이용한 이개혈종의 치료

박재율,신승헌,김광훈,이웅렬,박일동,박광헌,마도훈,전일훈 대한이비인후과학회 2000 대한이비인후과학회지 두경부외과학 Vol.43 No.2

국립공원 3개 저수지에 서식하는 생태계교란 어종의 서식양상과 먹이생물, 어류상에 미치는 영향

박승철 ( Seung-chul Park ),이광열 ( Kwang Yeol Lee ),최광식 ( Kwang-seek Choi ),한미숙 ( Mee-sook Han ),고명훈 ( Myeong-hun Ko ) 한국어류학회 2021 한국어류학회지 Vol.33 No.2

본 연구는 국립공원 내 생태계교란 어종 배스와 블루길의 도입에 따른 영향을 파악하기 위해 2020년 금계지, 삼가지, 내장지에서 조사를 실시하였다. 금계지에서는 7과 11종 1,221개체가 채집되었고, 배스는 우점종 (96.3%), 블루길은 소수 (0.3%) 서식하고 있었고, 배스는 주로 밀어 (IRI, 37.2%)와 잠자리목(25.6%), 뱀잠자리목 (11.6%), 배스 (7.0%) 등을 섭식하였다. 삼가지에서는 5과 10종 854개체가 채집되었고, 배스는 우점종(60.8%)으로 주로 새우류 (33.6%)와 잠자리목 (34.4%), 밀어(21.2%), 피라미 (6.1%) 등을 섭식하였다. 내장지에서는 7과 13종 1,075개체가 채집되었고, 블루길은 우점종 (38.1%), 배스는 우세종 (9.5%)으로 나타났으며, 블루길은 주로 물벼룩류 (IRI, 77.5%)와 파리목 (9.8%), 새우류 (4.0%) 등을 섭식하였고 배스는 주로 밀어 (73.3%)와 새우류 (21.2%) 등을 섭식하였다. 금계지와 삼가지의 배스는 10여 년 전에 도입된 것으로 추정되고, 도입 이후 대부분의 어류는 개체수가 급격히 감소하였다. 내장지의 블루길은 20여 년 전에 도입된 것으로 추정되며, 도입 이후 상대풍부도가 점점 증가하여 40%대에 도달하였고, 배스는 5~6년 전에 도입되었고 도입 이후 자생 어류의 종수와 개체수가 급격히 감소하였다. 마지막으로 국립공원 내 배스와 블루길의 서식현황 및 관리방안에 대해서 논의하였다. This study was conducted to elucidate the impact of invasive species, Micropterus salmoides and Lepomis macrochirus in Geumgyeji, Samgaji and Naejangji reservoirs of National Parks, Korea in 2020. In the Geumgyeji, 1,221 individuals of 11 species in 7 families were collected including M. salmoides (relative abundance, 96.3%) and L. macrochirus (0.3%), M. salmoides fed mainly on Rhinogobius brunneus (IRI, 37.2%), Odonata (25.6%), Megaloptera (11.6%), and M. salmoides (7.0%). In the results of Samgaji showed that 854 individuals of 10 species in 5 families were collected including M. salmoides (60.8%), and M. salmoides fed mainly on Decapoda (shrimp, 33.6%), Odonata (34.4%), R. brunneus (21.2%), and Zacco platypus (6.1%). In the Naejangji showed that 1,075 individuals of 13 species belonging to 7 families were collected including L. macrochirus (38.1%) and M. salmoides (9.5%), and L. macrochirus fed mainly on Branchiopoda (77.5%), Diptera (9.8%), Decapoda (4.0%) and M. salmoides fed mainly on R. brunneus (73.3%), Decapoda (21.2%). M. salmoides of Geumgyeji and Samgaji were apparently introduced more than a 10 years ago. The fish population declined rapidly since the introduction of M. salmoides. L. macrochirus of Naejangji was introduced more than 20 years ago, which increased its relative abundance to 40%. M. salmoides was introduced five to six years ago, and the fish species and population declined rapidly since the introduction of M. salmoides. Finally, we discussed the inhabitat status and management of M. salmoides and L. macrochirus in the National Park.

서울대학교 치과병원 장애인진료실의 외래환자마취 실태 분석

박창주,정준민,김현정,장기택,이상훈,염광원 大韓小兒齒科學會 2004 대한소아치과학회지 Vol.31 No.1

치과적 장애인이란 치과진료 시 치과의사에게 자발적인 협조가 힘든 사람을 의미한다. 본 연구는 서울대학 치과병원 장애인진료실에서 치료받은 치과적 장애인 환자들의 임상진료 실태를 마취과적으로 분석하고 향후 장애인 치과치료에 대한지침 을 마련하고자 하였다. 1999년 1월부터 2002년 10월까지 서울대학교 치과병원 장애인진료실에 내원한 장애인 환자들을 대상으로 조사한 결과, 총89명의 환자들에게 93건의 치과진료가 시행되었다. 환자의 대다수는 정신지체였고 전신마취 하 보존치료를 받았다. 주로 마취유도제는 thiopental, 근이완제는 vecuronium을 이용하였으며 산소, 아산화질소, enflurane을 함께 흡입시켜 마취를 유지하였다. 총 마취지속시간과 회복실 체류시간은 각각 164.4±57.2 분과 106.2±50.5 분이었고 회복 과정에서 심각한 합병증은 관찰되지 않았다. 본 연구는 외래환자마취에 기반한 서울대학교 치과병원 장애인진료실의 치료방침에 따라 특별한 문제없이 성공적인 마취가 가능하였음을 보여 주었다. 또한 증가하는 장애인 치과치료에 대한 수요를 충족시키기 위해서 적절한 시설과 인력을 갖춘 보다 많은 외래환자마취 센터의 필요성도 제시한다고 할 수 있다. Dentally disabled person means one who have difficulty in cooperating voluntarily with a dentist for routine dental care. Seoul National University Dental Hospital (SNUDH) Dental Clinic for Disabled has worked for them under outpatient anesthesia concept. The aim of this study was to determine the anesthetic characteristics of the patients attending for dental treatment at SNUDH Dental Clinic for Disabled in order to establish better future treatment plans. The data were drawn from the patients who visited SNUDH Dental Clinic for Disabled from January 1999 to October 2002. Total 93 dental treatments for 83 patients were enrolled in this study. Most patients had mental retardation and the conservative treatments were carried out under general anesthesia. Thiopental and vecuronium were mostly used for induction agent and neuromuscular blocker, respectively. Enflurane, with oxygen and nitrous oxide, was mostly used to maintain the anesthesia. Mean total anesthetic time was 164.4±57.2 minutes and mean duration at the post-anesthetic care unit was 106.2±50.5 min. Serious postoperative complications were not observed. These results showed our successful anesthetic outcomes without any severe side effect or complication and the needs of more outpatient centers for dental care for disabled.

圓光醫大 附屬 第2病院 神經精神科 患者에 對한 統計的 考察(Ⅱ)

박민철,장광철,김상원,김한주,유미경,김훈,유용진,김현정,박남진,오상우,이귀행,노승호,백영석 圓光大學校 醫科大學 神經精神科學敎室 1992 圓光精神醫學 Vol.8 No.1

본 연구는 1986년 7월 11일부터 1991년 7월 10일까지 원광의대 부속 제2병원 신경정신과에서 의래 및 입원치료를 받았던 6,072명의 환자를 대상으로 병원 역학조사를 실시하고 그 결과를 1차조사 (박민철 등1986)와 비교했다. 1.전체 환자 중 남자가 54.4%로 여자보다 많았고, 이리와 이리 인접지역이 84.0%로 대부분의 지역을 나타났다. 의료보장상태는 보험환자가 57.1%, 의료보호환자21.8%, 일반환자 21.1%였으며 연령별로는 20대 24.6%, 30대 22.8%로 20대 30대가 절반정도를 차지했다. 2.외래환자에서는 신경중성장애가 46.0%로 가장 많고 정동장애, 경련성장애 순이며, 입원환자에서는 정신분열증이 30.5%로 가장 많고 기질성정신장애, 정동장애의 순이었다. 3.남자는 신경증성쟝애(23.4%), 정신분열증, 기질성정신장애 순이고 여자는 신경증성장애(39.9%), 정동장애, 정신분열증의 순이었다. 남자가 여자보다 많은 진단은 알코올정신장애(94.6%), 기질성정신장애, 소아정신장애 순이고, 여자가 남자보다 많은 진단은 정동장애(64.5%), 신경증성장애였다. 4.진단별 연령분포에서 신경증성장에는 30대(25.3%), 20대, 40대 순이고, 정신분열증은 20대(40.5%), 30대, 40대 순이며, 정동장애는 20대, 30대, 50대 순이나 비교적 비슷한 융이었다. 5.진단별 발병연령에서 신경증성장에는 20대, 30대가 절반이고,정신분열증은 20대(51.3%), 10대, 30대 순이며 정동장애는 20대(30.7%), 30대, 50대 순이었다. 진단별 평균 발병연령은 신경증성장애 32.7세, 정동장애 36.1세, 정신분열증 23.6세였다. 6.진단별 이병기간은 2년이상이 신경증성장에 28.3%, 정신분열증 68.5% 정동장애 43.9%인데 전체적으로 41.0%였다. 진단별 평균 이병기간은 정신분열증 73.2개월, 정동장애 45.5개월, 신경증성장애 29.5개월이었다. We examined epidemiologic study of 6,072 patients who visited Wonkwang Neuropsychiatric hospital since July 11 of 1986 until July 10 of 1991 and compared this results with previous study(Park et al 1986). The study revealed as follows:1. Of total patients males visited this hosptial more than females as 57.1%, Most of them(84.0%) resided Iri and neighbouring Iri. In the point of insurance, insured patients, medicaid patients and uninsured patients were 57.1%, 21.8% and 21.1% respectively. On the distribution of age, the twenties, the thirties were 24.6%, 22.8% respectively and twenties and thirties were about half of total patients. 2. Of outpatients neurotic disorder was the most as 46.0%, secondly mood disorder and thirdly convulsive disorder, but of inpatients schizophrenia was the most as 30.5%, secondly organic mental disorder and thirdly mood disorder. 3. Of males neurotic disorder was the most as 23.4%, secondly schizophrenia, and thirdly organic mental disorder, but of females neurotic disorder was the most as 39.9%, secondly mood disorder and thirdly schizophrenia. alcoholic mental disorder(94.6%), organic mental disorder, child mental disorder were mostly found in males,but mood disorder(64.5%) and neurotic disorder were mostly found in females. 4. On the distribution of age neurotic disorder was found the most in the thirties(25.3%), next in the twenties and in the forties, and schizophrenia was found the most in the twenties(40.5%), next in the thirties and in the forties, but mood disorder was found the most in the twenties, next in the thirties and in the forties but revealed similar rates relatively. 5. On the distribution of age of onset neurotic disorder developed nearly half during the twrnties and the thirties, schizophrenia developed mostly during the twenties (51.3%), secondly the teens and thirdly the thirties, but mood disorder developed firstly the twenties(30.7%), secondly the thirties and thirdly the fifties. on the average age of onset of illness neurotic disorder, mood disorder and schizophrenia were 32.7 years, 36.1 years and 23.6 years respectively. 6. On the duration of illness more than two years was 28.3% in neurotic disorder, 68.5% in schizophrenia and 3.9% in mood disorder and on the average duration of illness schizophrenia, mood disorder and neurotic disorder were 73.2 months, 45.5 months and 29.5 months respectively.

천연두 백신 접종 후 발생된 급성 심근염 1예

박옥성,김종환,이광욱,윤성훈,강동구,이승욱,조상기 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.2

Acute myocarditis complicating coronary vasospasm after smallpox vaccination is very rare complication that can be generally developed within less than 30 days after vaccination. Clinically and biochemically, this disorder is often mimic and highly suggestive of acute myocardial infarction. We report 21 years old man that had a history of a smallpox vaccination 3 weeks ago and prodromal symptoms(fever, malaise etc) a few days ago. hIe visited to our hospital because of abrupt onset of severe substernal chest pain, dyspnea and diaphoresis. At admission, electrocardiography was ST elevation in lead Ⅰ, aVL, V4, V5, and V6. The CK-MB level was 68 U/L, LDH level was 760 U/L, Troponin-Ⅰ was 24.64 ng/㎖, and Troponin-T was positive. 2D-echocardiograpy was normal left ventricular function, Clinically we presumed this disorder as acute myocardial infarction and we promptly performed the coronary angiography and revealed focal spasm in distal left coronary artery territory without critical stenosis in both coronary arteries. We diagnosed this disorder as coronary vasospam complicating acute myocarditis that is different with acute myocardial infarction, and we prescribed nitroglycerin and nifedipine. After discharge, he is now well without any symptoms and has been following up monthly at our outward department for 6 months.

이중외피 파사드의 운전모델 개발에 관한 연구

박유영,조재훈,여명석,김광우 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1

The objective of this study is to develop the operation model of the double-skin facade for energy conservation and user comfort. This study proposes development process of the operation model in three steps. A case study is used to investigate the feasibility of the process. The G building in Kungkido is chosen. The main contents of this study are as follows. 1) The operation objectives and standards are established. And the operation factors classified according to the objectives and standards. 2) Correlation of the operation factors are clarified. And Individual models. The operation model is essential to building which has the double-skin facade and logical operation would be improved by this model. For the practical application of this operation model, it will be needed to connect the building management system.

放射電磁波에 의한 絶緣診斷에 관한 硏究

김영훈,박원주,이동인,김충년,이광식 嶺南大學校 工業技術硏究所 1995 工業技術硏究所論文集 Vol.23 No.1

In this paper, the detect of insulation disorder and process degree of insulation degradation of power apparatus, the waveform of discharge current, magnitude of discharge and frequency spectrum of the electromagnetic wave radiated from partial discharge by simulating with needle-to-plane electrode geometry and dielectric with artificial void, were investigated. The results obtained can be summarized as follows. 1) Streamer pulses occur near the positive cycle and trichel pulses near the peak of negative cycle of applied voltage. At that time, discharge magnitude of trichel pulses and streamer pulses was observed about 200[pC] and 500[pC] in air, respectively. 2) The level and frequency spectrum of radiated electromagnetic waves were increased about 20∼40[dB] at under 200[MHz] and about 2∼3[dB] above 200[MHz], compared with background noises. 3) A sudden change of discharge magnitute above 20∼30[pC] was observed with various applied voltages, but the magnitude showered to tend to saturate at 300∼300[pC] in dielectric. 4) The level and frequency spectrum of radiated electromagnetic waves were increased about 3∼6[dB] under 200[MHz]and about 2∼3[dB] above 200 [MHz], compared with background noises.

Mastoparan B의 항균 활성 및 용혈 작용에 미치는 소수성도와 양친매성의 영향

이봉헌,김광호,장태식,박남규,박장수,강신원 부산대학교 유전공학연구소 1998 분자생물학 연구보 Vol.14 No.-

Tetradecapeptide인 Mastoparan B(MP B)와 이의〔Ala〕-MP B유도체들을 합성하고 항균 활성 및 용혈 작용을 측정하여 MP B의 활성에 미치는 소수성도(hydrophobicity)와 양친매성(amphiphilicity)의 영향을 비교하였다. 그 결과 MP B와 소수성도가 MP B 보다 큰〔Ala^2〕-,〔Ala^4〕-MP B유도체가 큰 항균 활성을 나타내었으며, 소수성도가 MP B보다 작은〔Ala^6〕-MP B유도체의 활성은 MP B와 비슷하거나 작게 나타나 소수성도가 큰 유도체일수록 항균활성을 크게 나타내었다. 그러나 MP B보다 소수성도가 큰 유도체인〔Ala^9〕-MP B는 Ala에 의한 Trp의 치환때문에 MP B보다 작은 활성을 나타내었다.용혈 활성 측정 결과 MP B보다 소수성도가 큰〔Ala^2〕-,〔Ala^4〕-MP B유도체가 각각100.0%와 69.4%로써 용혈 작용을 크게 나타냈으나, 소수성도가 작은〔Ala^6〕-MP B유도체는 6.1%로써 가장 작은 용혈 작용을 나타내었고 Trp대신 Ala으로 치환한 소수성도가 큰 유도체인〔Ala^9〕-MP B는 MP B보다 작은 26.0%의 용혈 작용을 나타내었다. 그러므로 용혈 작용은 소수성도가 클수록 증가하였으며 양친매성이 활성에 미치는 영향은 적었다. Tetradecapeptide.Mastoparan B(MP B)and its〔Ala^2 〕-,〔Ala^4〕-,〔Ala^6〕-,〔Ala^9〕-MP Bderivatives were synthesized, and then their antibacterical and hemolitic were to examine the effect of hydrophobicity and ampiphilicity on the MP B-induced those activities. MP B and more hydrophobic〔Ala^2 〕-,〔Ala^4〕-MP B showed stronger antibacterical activity and less hydrophobic〔Ala^6〕-MP B than MP B did similar or weaker activity, so more hydrophobic〔Ala〕-MP B derivative had stronger activity. But more hydrophobic〔Ala^9〕-MP B than MP B showed weaker activity because of its Trp subsitution by Ala. On the other hand,〔Ala^2 〕-and〔Ala^4〕-MP B showed 100.0% and 69.4% hemoiytic activity, but〔Ala^6〕-MP B did the weakwst activity(6.1%)and〔Ala^9〕-MP B, weaker activity(26.0%) than MP B.Therefore, more hydrophobic〔Ala〕-MP B derviative had stronger activity and the effect of ampiphilicity on the activity was weak.

Walk-Up flap을 이용한 악안면 영역의 결손부 재건

신상훈,박성진,이광호,이성근 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.2

Oral and Maxillofacial defects is produced by trauma or cancer surgery. This defects have been shown functional loss such as mastication, swallowing, speech and psychosocial esthetic problem. Oral and Maxillofacial defects is reconstructed by the use of many flaps. However although previous flap surgery was done, additional soft tissue defects can be still remained. In this case, Walk-Up flap that is introduced by Marx RE in 1990 is recommended for successful reconstruction. We report Walk-Up flap for reconstruction of remained soft tissue defects of tongue S.C .C. After induction chemotherapy, tongue S.C.C. is excised surgically and reconstructed by use of PMMC flap. Post-op infection results in surrounding soft tissue defect with oho-facial fistula. We have experienced a case of Walk-up flap by use of PMMC flap for reconstruction with satisfactory result, so we report it with literature reviews.