Clinical Outcome of Modified Cervical Lateral Mass Screw Fixation Technique

Kim, Seong-Hwan,Seo, Won-Deog,Kim, Ki-Hong,Yeo, Hyung-Tae,Choi, Gi-Hwan,Kim, Dae-Hyun The Korean Neurosurgical Society 2012 Journal of Korean neurosurgical society Vol.52 No.2

Objective : The purpose of this study was 1) to analyze clinically-executed cervical lateral mass screw fixation by the Kim's technique as suggested in the previous morphometric and cadaveric study and 2) to examine various complications and bicortical purchase that are important for b-one fusion. Methods : A retrospective study was done on the charts, operative records, radiographs, and clinical follow up of thirty-nine patients. One hundred and seventy-eight lateral mass screws were analyzed. The spinal nerve injury, violation of the facet joint, vertebral artery injury, and the bicortical purchases were examined at each lateral mass. Results : All thirty-nine patients received instrumentations with poly axial screws and rod systems, in which one hundred and seventy-eight screws in total. No vertebral artery injury or nerve root injury were observed. Sixteen facet joint violations were observed (9.0%). Bicortical purchases were achieved on one hundred and fifty-six (87.6%). Bone fusion was achieved in all patients. Conclusion : The advantages of the Kim's technique are that it is performed by using given anatomical structures and that the complication rate is as low as those of other known techniques. The Kim's technique can be performed easily and safely without fluoroscopic assistance for the treatment of many cervical diseases.

불순물 첨가 BGO 섬광체 단결정의 육성과 열형광 특성

김성철,김중환,김종일,정중현,도시홍,김기동,이대원 동의대학교 기초과학연구소 1996 基礎科學硏究論文集 Vol.6 No.1

Eu or Fe doped BGO scintillation crystals were grown by Czochralski method. In order to get information about traps in the grown BGO crystals, we measured trap parameters including activation energy, frequency factor and the kinetic order of thermoluminescence, and compared such parameters with thermoluminescent characteristics of pure BGO scintillation crystals. In addition, optical transmittance of the grown BGO crystals was measured.

전경대원에서 발생한 결핵의 임상 양상

문창기,박상준,조민구,김영중,김소연,김윤권,정준오,안석진,김은실,서승오,김지훈,최원제,이윤영,박형기,최규영,김현근 대한감염학회 2006 감염과 화학요법 Vol.38 No.6

Background: The purpose of this study was to document the incidence and clinical characteristics of patients with tuberculosis (TB) in combat and auxiliary police, living in a group, in Korea where the incidence rate of active TB in a general population is higher than in Western countries. Materials and Methods:We retrospectively reviewed the medical records of all tuberculosis patients diagnosed at National Police Hospital from January 2002 through December 2004. Results:In 2002-2004, a total of 156 cases of tuberculosis were identified with the mean (Standard deviation) age of 20.6 (±1.0) years. Of these, 134 (85.9%) patients were registered as new cases, 11 (7.1%) as relapse, 2 (1.3%) as failure, 5 (3.1%) as treatment-after-default cases whereas 4 (2.6 %) patients were not included in any categories. Average annual new TB rate and smear-positive TB rate were 86.5/10^(5) and 17.4/10^(5) person-years, respectively. In 12 of 31 smear-positive cases, time from onset of symptoms to diagnosis was more than 30 days. Two multidrug-resistance TB cases were identified and two suspected outbreak episodes of TB had occurred during 3 years. Conclusion:There was no statistically significant difference in the incidence rate of new cases of TB between the general population aged 20 to 29 years and combat and auxiliary police in Korea. 배경 : 국내 결핵의 발생은 감소 추세에 있으나 여전히 후진국형 발생양상을 보이고 있다. 특히 집단생활을 하는 젊은이들에서 발생하는 결핵의 유행이 간헐적으로 알려지고 있어 우려를 낳고 있다. 이에 저자들은 최근 전경대원의 결핵 발병 양상에 대해 알아보고자 본 연구를 시행하였다. 재료 및 방법 : 2002년 1월부터 2004년 12월까지 3년간 경찰병원에서 결핵 진료를 받은 전경대원의 의무기록을 후향적으로 분석하여 연도별 결핵 신환발생률, 도말양성결핵 신환율, 진단 지연, 집단발병, 다제내성결핵을 조사하였다. 결과 : 연도별 결핵 신환자 수(10만명당 발생추정치)는 2002년 50명(83.6명), 2003년 42명(83.7명), 2004년 42명(93.5명)이었고 도말양성 폐결핵 신환자 수는 2002년 10명(16.7명), 2003년 11명(21.9명), 2004년 6명(13.4명)이었다. 3년간 도말양성 폐결핵 환자는 31명이 있었고 그 중 12명은 호흡기 증상 발생 30일이 지나서 진단을 받았다. 다제내성 결핵은 2명이 있었으며 결핵의 집단발병이 의심되는 사례는 2차례 있었다. 결론 : 전경대원과 20-29세 연령군 일반인의 결핵 신환발생률, 도말양성 폐결핵 발생률의 통계적으로 유의한 차이는 없었다.

석탄 가스화를 통한 전력 생산과 DME 병산 공정에 대한 기초 경제성 분석

유영돈 ( Young Don Yoo ),김수현 ( Su Hyun Kim ),조원준 ( Won Jun Cho ),모용기 ( Yong Gi Mo ),송용택 ( Tae Kyong Song ) 한국화학공학회 2014 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.52 No.6

석탄가스화를 기반으로 한 발전(IGCC 발전) 및 화학원료 제조공정의 상업화 관건은 화석연료인 원유 또는 천연가스를 기반으로 생산되는 경우와 비교하여 경제성을 확보할 수 있는지 여부이다. 경제성 확보를 위한 가장 현실적인 방법으로는 석탄 가스화를 통해 얻어진 합성가스로부터 2개 이상의 생산물(예: 발전과 화학원료를 동시 생산)을 병산(coproduction또는 poly-generation)하는 것이다. 본 연구에서는 석탄 가스화를 기반으로 하여 발전과 수송용, 발전용 및 가정용 연료로 사용이 가능한 DME(dimethyl ether)를 병산하는 공정에 대한 경제성 분석을 실시하였다. 경제성 분석을 위한 병산 공정에서는 250 MW 전력생산 연간 30만 톤의 DMZ 생산을 기준으로 하였다. 병산 공정에서 DME 판매가격이 50만원/ton인 경우, 전기 생산원가는 34.8~58.4원/kWh으로 SMP(계통한계가격) 가중평균인 150.69원/kwh(2013년 1월~12월까지의 평균값)의 33~58% 수준으로 산정되었다. 따라서, DME 판매가격이 적정하게 유지될 경우 석탄IGCC+DME 병산공정은 IGCC 단독 발전과 비교하여 경제성을 확보할 수 있을 것으로 판단된다. 현재 중국에서 DME판매가격이 900,000원/톤 내외이므로, 전력과 DME를 병산할 경우, IGCC 단독으로 전력을 생산할 경우와 비교하여 전력 생산 원가를 월등하게 낮출 수 있음을 알 수 있다. 이와 같이 석탄 가스화를 기반으로 한 병산 공정을 통해 전력과 DME를 병산하는 시스템에서, 시장 여건에 따라 전력과 DME 생산비율 제어가 가능하고, 석탄 가스화기 및 정제 시스템을 공통 설비로 활용함으로써, 개별적으로 생산하는 것보다 생산 원가를 낮출 수 있다는 결과를 얻었다. The key for the commercial deployment of IGCC power plants or chemical (methanol, dimethyl ether, etc.) production plants based on coal gasification is their economic advantage over plants producing electricity or chemicals from crude oil or natural gas. The better economy of coal gasification based plants can be obtained by co-production of electricity and chemicals. In this study, we carried out the economic feasibility analysis on the process of co-producing electricity and DME (dimethyl ether) using coal gasification. The plant’s capacity was 250 MW electric and DME production of 300,000 ton per year. Assuming that the sales price of DME is 500,000 won/ton, the production cost of electricity is in the range of 33~58% of 150.69 won/kwh which is the average of SMP (system marginal price) in 2013, Korea. At present, the sales price of DME in China is approximately 900,000 won/ton. Therefore, there are more potential for lowering the price of co-produced electricity when comparing that from IGCC only. Since the co-production system can not only use the coal gasifier and the gas purification process as a common facility but also can control production rates of electricity and DME depending on the market demand, the production cost of electricity and DME can be significantly reduced compared to the process of producing electricity or DME separately.

초음파 가이드를 통한 맥락막상강출혈의 치료

이기헌,유재호,김태원,이상준,김신동 고신대학교 의과대학 2009 고신대학교 의과대학 학술지 Vol.24 No.1

Purpose : Intraoperative suprachoroidal hemorrhage is one of the most serious complications. We report a case of suprachoroidal hemorrhage during phacoemulsification surgery, was managed properly. Methods : Suprachoroidal hemorrhage occurred during phacoemulsificaiton in other hospital. The patient was referred to our department immediately after closing the surgical wound. On initial examination, iris and vitreous were prolapsed through surgical wound. Ciliary body was closely place to anterior chamber, and retina was not visible. Results : Prolapased ocular tissue were reduced by emergency operation. We controlled the patient’s intraocular pressure and inflammation. Ultrasonography was repeatedly performed to check the degree of liquefaction of suprachoroidal hemorrhage. After 9 days of suprachoroidal hemorrhage onset, vitrectomy and drainage through sclera was performed. Postoperative state was stable with successful removal of suprachoroidal hemorrhage. After 2 weeks of secondary operation, retinal detachment has occurred on nasal retinal area, so we performed scleral buckling and endolaser photocoagulation. After 6 months, retina was attached well and intraocular pressure was in normal range. Conclusion : In suprachoroidal hemorrhage, drainage of suprachoroidal hemorrhage after liquefaction of thrombi is effective. After successful drainage, postoperative complications may accompany such as retinal detachment or elevation of intraocular pressure. 목적 : 술중 발생하는 맥락막상 출혈은 매우 심각한 합병증이다. 저자는 수정체 유화술 중에 발생한 맥락막상 출혈을 적절히 대처한 증례를 보고하는 바이다. 대상과 방법 : 수정체 유화술 중 발생한 맥락막상강 출혈환자가 수술창을 봉합 후 즉시 본원으로 전원되었다. 초진시 홍채와 유리체가 수술창을 통해 탈출되어 있었으며, 전방을 통해 모양체가 확인되었으나, 망막은 보이지 않았다. 탈출된 안구내 조직을 응급수술을 통해 복원 후 환자의 안압과 염증을 조절하였다. 초음파를 반복적으로 실시하여 맥락막상 출혈의 액화 정도를 확인하였으며, 출혈 9일 후 유리체 절제술과 공막을 통한 배액술을 시행하였다. 결과 : 맥락막상 출혈이 성공적으로 제거되었으며 술 후 상태는 안정적이었다. 수술 2주 후 비측 망막 박리가 발생하여 공막돌륭술과 안구내 삽관 레이저술을 시행하였다. 6개월 후 망막은 잘 붙어있었으며, 안압은 정상 범위를 유지하였다. 결론 : 맥락막상 출혈의 경우 출혈의 배액 시기를 결정하는 것이 어렵지만, 규칙적인 초음파를 통해 배액술의 시기를 결정할 수 있다. 또한 맥락막상강 출혈의 성공적인 배액 이후에도 망막박리 및 안압상승과 같은 합병증의 동반에 대해 유념해야한다.

자궁내 태아 사망에 대한 임상적 고찰 (1990-1997)

김희범,서기원 순천향의학연구소;Soonchunhyang Medical Research Institute 2000 Journal of Soonchunhyang Medical Science Vol.6 No.1

Objective : Our purpose of this study was to evaluated the incidence, cause of intrauterine fetal death, termination method and the maternal complications of fetal death clinically. Patients : From January 1990 to December 1997, a retrospective study was made of the hospital records of 188 cases of the intrauterine fetal death among 42,576 deliveries after 20 weeks gestation by gestational age in Soonchunhyang Kumi Hospital. Results : The incidence of the fetal death in utero was 0.44%. The most common gestational week when intrauterine fetal death was detected was 35-40 gestational weeks(35.6%). The parity of mother in the fetal demise in utero was not different between nulliparous and multiparous women. The sex ratio of fetus in intrauterine death was not different between male and female. The cases of the fetal death in utero weighting less than 2500gm were 134 cases(71.2%). The causes of the intrauterine fetal death showed unknown causes(51.6%), maternal diabetes(11.2%), abruptio placenta(8.5%), congenital anomaly(8.0%), pregnancy induced hypertension(5.9%), intrauterine infection(5.3%), cord complication(4.3%), multiple causes(2.7%), vasa previa rupture(1.6%) and oligohydramnios(1.1%). The mode of the pregnancy termination for intrauterine fetal death showed prostaglandin E2(42.0%), oxytocin(34.5%), hysterotomy(11.2%), spontaneous delivery (9.6%), and misoprostol(2.7%). The maternal complication were hemorrhage(4.3%), infection(1.6%), cervical laceration(1.1%), and uterine rupture(0.5%). Conclusion : The cause in about 50% of the intrauterine fetal death could not be determined, so further studies must be made on mother, stillborn infants, placenta and umbilical card in cases where the causes in unknown for the purpose of good outcome and prevention of intrauterine fetal death in next pregnancy. And the studies investigating the safe and effective method for pregnancy termination are needed in order to reduced maternal complication and shortened termination time.

Pentaethlenehexamine XAD-4 수지를 이용한 금속이온의 흡착 및 분리에 관한 연구

김선덕,정원규,장기호 大邱大學校附設 基礎科學硏究所 1988 基礎科學硏究 Vol.5 No.-

The new chelating resin Pentaethylenehexamine XAD-4 was synthesized by the reaction of Amberlite XAD-4 resin and the chelate reagent Pentaethylenehexamine. The newly prepared resin contained 0.75 mmol of Pentaethylenehexamine per gram of resin and showed weak base behavior in aqueous solutions. The capacity of adsorption of metal ions are Mg(II) 1.0×10-³, Ca(II) 1.95×10-¹, Sr(II) 2.14×10-¹, Ba(II) 2.54×10-¹, Cu(II) 7.2×10-¹, Ni(II) 2.50×10-¹, Zn(1l) 2.11×10-¹, Co(II) 2.01×10-¹, m mol per gram of the chelating resin. Also, the elution order of the alkaline-earth metal ion Mg(II), Ca(Il), Sr(II), follow by Ba(II), and for the transition metal ions are eluted to Co (II), Zn(II), Ni(II), and Cu(II) in order.

韓國行政學의 發達過程과 土着化方案에 관한 硏究

金永聲,申基源 충남대학교 법률행정연구소 1989 논문집 Vol.17 No.-

분산 객체 컴퓨팅 환경에서 객체 그룹 구현에 관한 연구

김길준,이주석,송기범,김충원,이준 조선대학교 전자정보통신연구소 2002 電子情報通信硏究所論文誌 Vol.5 No.1

CORBA, which is a standard base of distributed object in distributed computing environment, suggests the method for clearly creating the demand for object defined on OMG and receiving it. Although CORBA appeared as the standard of distributed object and has played an important role in operating distributed object between different computer systems, distributed object computing has such fundamental problem as great demand by many clients an3 Server and the overload of network. CORBA is middle-ware technology to develop one distributed application program by connecting separately-developed distributed object in various platforms which are connected in, open communication network. With expansion of distributed application software scale and complex interface between distributed objects, this study defines object as group in the concept of aggregate in order to control efficiently and to be controlled as group by grouping multi-arranged object and suggests group object model in the side of controller for efficient control of distributed object.

양지면 전원주택단지 프로젝트 계획

김신원,정유홍,노희곤,도의성,최기왕 경희대학교 디자인연구원 2006 예술· 디자인학연구 Vol.9 No.2

This plan of rural housing-development is to present a new orientation for the residential culture that can meet the shifting demands of modern people as their attitudes toward naturalistic life. In this plan, sites of possible, a new housing complex is designed to supplement the site partition problem of existing housing complex by using attractiveness that the site has as a residence environment in housing planning. The conclusion can be summarized as follows. 1. Currently, most residential developments on slopes are planned with excessive slope cutting or filling on existing natural slopes rather than utilizing existing contours. In consideration of this, this proposed plan uses the existing contours of the slope to the maximum capacity in site planning. 2. The majority of the home site buyers are between the ages 30's to 50's of middle to high level incomes. Reflecting the financial needs of these families, home construction was planned by using building methods that require lower costs. 3. Reflected open-space furtherance maximum at design of community equipment for party's offer to sale in lots persons, from site purchase recognition of construction to in package sale in lots way select. 4. Considered to preserve existing natural-food life in way financial world stroke maximum, and accomplish creation with existing vegetation. Also, did planting considering privacy, and considered vegetation's environment adaptation degree because using midland style vegetation. 5. Garden wished to offer an opportunity that can make by oneself directly depending on each fondness and character to tenants. If is this intuition, wished to design, and maintained spur of housing development because housing development uses maximum natural history style comparing with other power jars all. Also, because considering people who move in housing-development, designed, and tried to make housing-development that want to live most offering the convenience.