혈행화된 두개골 피판을 이용한 안와저 및 안와하연의 재건술 치험례

정윤규,이훈범,김석원,봉정표,김균태,김주봉 大韓成形外科學會 1998 Archives of Plastic Surgery Vol.25 No.5

A number of methods have been introduced for support the orbital floor following a maxillectomy without orbital exenteration or severe facial trauma. These methods including skin graft and muscular sling provided the unsatisfactory results, like as diplopia, orbital ptosis, enophthalmos and severe facial deformity. Therefore the bone and soft tissue reconstructions using microvascular free flaps were performed recently by many surgeons, but long time operation, donor site morbidity, postoperative large scar, and ptosis of the flap were pointed out as disadvantages of free flap reconstruction. Vascularized calvarial bone flap, a modified method of free calvarial bone graft, was adequate for reconstruction of the orbital floor and the infraorbital rim as a horizontal buttress, especially in case of poor vascular bed and postradiated state. The authors introduced the vascularized calvarial bone flap for the orbital floor and the infraorbital rim reconstruction in 3 cases of maxillectomy, and could be obtained satisfactory results aesthetically and functionally.

데이터 신뢰성을 높이기 위한 CRC BLOCK을 갖는 DSP INTERFACE 설계

김인규,하주영,김주현,강봉순 東亞大學校附設 情報技術硏究所 2005 情報技術硏究所論文誌 Vol.13 No.1

This paper presents the design and implementation of a DSP interface between a rotary machine encoder and DSP The data transfer process has unique data format for harmonious communication between DSP and encoder. In DSP Interface confirm data format that transferred from DSP to encoder and received data. Also it detected occurrence of the error. In order to data detect, As DSP interface has CRC Block that generate promised data and it is possible to more stable communication and we get high data integrity.

폐결핵으로 오인된 SIADH를 동반한 편평상피 세포폐암 1예

김순제,류하근,김선두,이길도,박봉안,류주성,유재등,김인숙,신현준,문언수 대한노인병학회 1999 Annals of geriatric medicine and research Vol.3 No.4

活性炭에 의한 重金屬 시안化物 錯陰이온의 吸着特性

金柱奉,李成植,李來雨,孫晋彦 東亞大學校 1985 東亞論叢 Vol.22 No.1

It is the purpose of this study to investigate the possibility and mechanisms of complex formation for the removal of cyanide and toxic heavy metals from mining and electroplating industrial wastewater simultaneously. The adsorption forms of heavy metals from a synthesized wastecyanide water by activated carbon is discussed. Under the cyanide complexiation, mercury ion is adsorbed in the formation of complex anion as ?? and Hg(CN)₃, but zinc and cadmium are also as ?? and ?/?. The effects are established under the presence of ?? in the concentration range ?? mol/ℓto ?? mol/ℓand the presence of heavy metals.

3 상유동층에서의 유동특성 및 물질전달에 관한 연구

김주봉,설수덕,장상목 동아대학교 공과대학 부설 한국자원개발연구소 1985 硏究報告 Vol.9 No.2

This study has been carried out to determine the hydrodynamic characteristics and mass transfer coefficient of NaOH solution in the three-phase fluidized bed. The effects of the superficial gas velocity, superficial liquid velocity, and the material of particles on the minimum fluidized velocity, phase holdup, volumetric liquid phase mass transfer coefficient and interfacial area were investigated The results were as follows, 1. The minimum fluidized velocity decreased with the superficial gas velocity. 2. The solid hold-up decreased with the superficial liquid velocity and gas velocity 3. The volumetric liquid phase mass transfer coefficient and interfacial area was increased with the superficial gas velocity, while was not effected by the superficial liquid velocity

주정중독 환자에서 Fluoxetine이 혈중 알콜 농도와 음주효과에 미치는 영향

김명정,박제민,정봉주 大韓神經精神醫學會 1994 신경정신의학 Vol.33 No.1

The effect of chronic administration of fluoxetine on blood alcohol concentration and on a number of alcohol induced physical and psychological effects was studied. The subjects were 14 hospitalized alcoholics without significant depression. After 21 days of 60mg daily fluoxetine and placebo administration. 2.5ml/kg body weight of 40% alcohol was administrated in a single dose and blood alcohol concentrations were measured 10, 20, 40, 60, 120, and 240min, after the alcohol intake. Mania Rating Scale score(MRS), pulse rate, respiratory rate and subjective physical condition were measured before and 30min, after alcohol intake. The results were as follows: 1) Blood alcohol concentrations were significantly higher after fluoxetine administration than placebo administration at 40min, and 60min, after alcohol intake. 2) Fluoxetine suppressed the increase of pluse rate induced by alcohol intake. However, no significant difference was noted in the alcohol induced changes in the scores of MRS, respiratory rate, and subjective physical condition between the drug and placebo administrations. 3) After fluoxetine administration, a significant negative correlation was shown between blood alcohol concentration, 10min after alcohol intake and MRS. In contrast, however, a significant positive correlation was seen between the two variable after placebo administration. From these results, it is suggested that fluoxetine increases blood alcohol concentration only during higher alcohol concentration and that the reduction of alcohol intake after chronic administration of fluoxetine may be due, at least in part, to an attenuation of positie reinforcement of alcohol effect, rather than to an enhancement of the aversion reaction to alcohol.

흰쥐에 있어서 납과 카드뮴이 Hepatic Microsomal Electron Transport System 활성도에 미치는 영향

김주봉,장성근,김기웅,송용범,김무호 순천향대학교 1994 논문집 Vol.17 No.3

In rats treated with lead nitrate and cadmium chloride we observed a change of he level of hepatic microsomal protein, cytochrome P-450 and ??, and electron transport system for P-450 dependent reaction. The contents of microsomal protein, P-450 and b5, and activity of NADPH-cytochrome C(P-450) reductase were decreased according to the dosage of lead nitrate and cadmium chloride. On the other hand, the activity of NADH-cytochrome ?? reductase was increased according to the dosage of lead nitrate and cadmium chloride. These results suggest that the content and activity of cytochrome dependent mono-oxygenase may be dependent on specificity of substrates, and electron transport occurred through two pathway, that is, NADPH-cytochrome C(P-450) reductase and ?? reductase but NADH-cytochrome ?? reductase was mainly act as a mobile carrier so-called second electron carrier.

2차 공기 주입각도에 따른 소각로 내부의 재순환 영역 변화

김성준,박민주,정봉준 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.B

The purpose of this research is to find out how the inlet angle of secondary air affects the formation of recirculation zone inside a small incinerator. A commercial code, PHOENICS, is used to simulate the flow field of an incinerator. The computational grid system is constructed by Multi-Block technique. Numerical experiments are done with the five different angles of secondary air inlet. The formation of recirculation zone is evaluated by checking velocity fields. The computational results show that recirculation zone is clearly formed from 60 degree of inlet angle and the zone of recirculation is widen as angle of recirculation is increased to 75˚.

뇌수술 시 과호흡과 만니톨의 투여가 뇌혈류와 뇌산소대사에 미치는 영향

김지헌,김경식,문봉기,조경기,신용삼,이영주,김진수 대한마취과학회 2002 Korean Journal of Anesthesiology Vol.43 No.4

Background: There are therapies to lower intracranial pressure (ICP) including head elevation, hyperventilation, diuretics injection, intravenous mannitol, hypothermia, cerebrospinal fluid drainage, and cerebral resection in neurosurgical patients. However in recent reports, hyperventilation followed by mannitol administration may lead to cerebral ischemia. Therefore, we investigated the effect of 0.5-1.0 g/kg mannitol administration on jugular venous oxygen saturation (SjVO_2) and cerebral arterial-jugular venous oxygen content difference (AVDO_2) at PaCO_2 25-30 mmHg and 35-40 mmHg in patients undergoing neurosurgery. Methods: we studied 17 patients undergoing neurosurgery in the Ajou University Hospital. Anesthesia was induced with fentanyl, midazolam, thiopental, and vecuronium, and maintained with )_2-Air-Isoflorane, a continuous infusion of fentanyl, and vecuronium. Patients were divided into two groups. Group 1 (n = 10) which is PaCO_2 25-30 mmHg and Group 2 (n = 7) which is PaCO_2 35-40 mmHg by controlling ventilator. Measurements of SjVO_2 and AVDO_2 in following time intervals: Ⅰ = preinjection of mannitol, Ⅱ = postinjection 20 minutes of mannitol, Ⅲ = postinjection 40 minutes of mannitol were obtainde for each group. 0.5-1.0 g/kg mannitol was administered intravenously just at duramater opening. Results: Hemodynamics and hematologics were not significantly different among the two groups. SjVO_2 of each group are as follows; Group 1; Ⅰ (70.3 ± 8.1%), Ⅱ (66.3 ± 6.9%), Ⅲ (69.1 ± 7.9%) and Group 2; Ⅰ (78.6 ± 7.4%), Ⅱ (75.1 ± 8.1%), Ⅲ (76.0 ± 11.2%), Hyperventilation significantly decreased SjVO_2- AVDO_2 was not significantly different but SjVO_2 in Ⅱ was significantly decreased compared with Ⅰ and Ⅲ in Group 1 (20% patients). Conclusions: Mannitol produced a change of SjVO_2 during hyterventilation. Therefore, intravenous mannitol during hyperventilation should be given cautiously according to the patients status because it may cause cerebral ischemia in critical patients. (Korean J Anesthediol 2002; 43: 462~467)

GLASS/UP系 複合材料의 破壞에 미치는 NOTCH平徑의 影響

김귀식,박경석,오맹종,김주봉 濟州大學校工科大學附屬産業技術硏究所 1992 尖端技術硏究所論文集 Vol.3 No.-

This study is investigated by experimental method and FEM about the effect of notch root radious(ρ) on the fracture of GFRP. The smaller ρshowed the fracture behavior which was mainly caused by the propagation of the stable crack, but the fracture behavior in the larger ρwas mainly caused by the spread of damage. The experimental value of the nominal stress could be estimated by FEM simulation and the load-displacement curve could also be drawn. According to the results simulated damage zone by FEM, as the ρis smaller, the damage begin at low stress.