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김성범,Kim, Seong-Beom 한국화재보험협회 2007 防災와 保險 Vol.122 No.-
BP 텍사스 시티의 석유정제소의 화재폭발은 2005년에 가장 많은 인명의 손실을 끼친 유동화자산의 화재폭발사고로서 15인의 생명을 앗아가고 200여 명의 사람을 다치게 하였다. 트럭 한 대의 역화(내연기관의 부정폭발)에서 시작된 점화원은 이성질체화시스템(ISOM) 대기암 통기구에서의 가연성 탄화수소 액체와 증발 기체를 발화시켰다. 화학안전위원회는 그 사고를 조사 및 검토한 후 BP사가 모든 면에서 기계적인 결함과 함께 안전성이 불완전하였음을 발견하였다. 본 고는 저자들이 미국화학안전위험조사위원회에 제출한 이들의 조사보고서를 번역 게재한 것이다.
Wideband Swtiching System의 Pathsearching 방법에 관한 연구
김성범,Kim, Seong-Beom 한국전자통신연구원 1983 전자통신 Vol.5 No.1
전자교환기의 통화로부분에서 free인 통화로를 선택 접속시켜주는 방법은 통화로의 구성과 기능에 따라 달라진다. 본 논문에서는 일반 전화뿐만 아니라 TV전화, 데이타전송, 비데오텍스(Videotex),스테레오방송 등을 교환 접속시켜 주는 광대역용 전자교환기(Wideband switching system)의 교환접속망(Switching matrix)을 효과적으로 구성하여 통화로 선택이 전교환접속망에 걸쳐 고루 분포될 수 있는 방법을 제안하였다. 그리고 그에 따른 pathsearching simulation program을 작성하여 실예를들어 설명함으로써 본 논문에서 제안한 통화노선택방법의 유용성을 보였다. The pathsearching method in switchingmatrix of an electronic switching system depends upon the structure and function of the system. In this paper, an efficient way to construct the switching matrix and a pathsearching method under the full distributed traffic theory in an wideband switching system, which can control not only normal telephone call, but also TV telephone, data communication, videotex and sound, is proposed. And the effectiveness of the method is shown through an example of the pathsearching simulation program.
김성범,심성용,김경준,남혜정,Kim, Seong-beom,Sim, Sung-yong,Kim, Kyung-jun,Nam, Hye-jeong 대한한방안이비인후피부과학회 2003 한방안이비인후피부과학회지 Vol.16 No.1
Vertigo is one of the common symptoms that we can see often clinically. It is hallucination to motion of oneself or surroundings. Vertigo include not only simple whirling sensation but also leaning or falling down sensation. Particularly in benign paroxysmal positional vertigo(BPPV), the principal symptom is dizziness and accompanied by nausea, lightheadness, vomiting. They are induced by positional change which like shake ones head or lay down or turn over in one' s sleep. Cause of BPPV is otoconium fragments which are released from inner ear and stimulate ampulla of semicircular canal. So in treatment BPPV, we often using the Dix-hallpike maneuver that realignment otoconium fragments. A case of vertigo patient suggested BPPV who is diagnosed oriental medically as weakly dizziness showed prominent improvement by medicate Bojungikgi-tang and operate otoconium-realignmentation (improved Dix-hallpike maneuver) maneuver so we reported.
창호의 성능인증 규격 기준과 면적 변화에 따른 에너지성능 비교분석
김성범(Kim Seong-Beom),이수열(Lee Su-Yeul),김동윤(Kim Dong-Yoon),최원기(Choi Won-Ki) 한국태양에너지학회 2020 한국태양에너지학회 논문집 Vol.40 No.1
This study reviewed selected specific windows and reviewed the window performance certification criteria including KS F 2278 and KS L 9107 and analyzed the change in performance based on the change of area. This study also compared the heating and cooling loads of an apartment house applied with window performance reviewed in consideration of insulation and SHGC performance and actual size based on KS F 2278. The analyzed window was a double window composed of aluminum and PVC and the building was the apartment house model of 141 m². The analysis results were as follows. First, as the window glass’s thermal performance is superior to frame, the performance degraded in reduced area. In case of selected window, the 1 m X 1m window’s thermal performance and SHGC decreased by 35% and 37% respectively compared to 2 m X 2 m window. Secondly, in the comparison of performance for increasing area with 2 m X 2 m and 3 m X 3 m windows, the 3 m X 3 m window’s thermal performance and SHCG increased about 14%. Third, in the comparison of heating and cooling loads of the analyzed model considering the apartment house model applied with window performance derived from KS F 2278 and actual figures, the model’s total heating and cooling loads increased by 33% with cooling decreasing by 36% and heating increasing by 77%. Above analysis results show that evaluation of window performance based on criteria such as KS F 2278 and KS L 9107 may lead to distortion of performances different from actual products. Thus, it is necessary to suggest new evaluation criteria.
Multiple Laser Beam Absorption에 유기된 Thermal Crack을 이용한 유리 절단에 관한 연구
김성범(Seong-Beom Kim),변철웅(Cheolwoong Byun),양민양(Min-Yang Yang) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.3
Traditional glass cutting method uses diamond wheel to scribe the surface of glass. But scribing cutting method has many problems. Scribing Process makes Chips and particles and these unexpected things affect the quality of glass. Contrary to scribing method, laser glass cutting method has many advantages. Several kinds of laser are used in glass cutting. In this paper laser, glass cutting by Multiple Laser Beam Absorption using Yb:YAG Laser is analyzed after nondimensionalization of all variables and simulated using FEM. Laser power absorptivity of glass is obtained by comparison between measured temperature and temperature calculated using FEM. Stress-intensity factor is calculated using multiple layer thickness averaged method from results of three dimensional thermal-stress FEM. Finally optimal normalized heat flux is obtained and this matched well with the glass cutting experiment.
국내 하수슬러지 소각시설에서 발생되는 비산재의 특성 분석
김성범(Seong Beom Kim),이원태(Wontae Lee) 大韓環境工學會 2016 대한환경공학회지 Vol.38 No.2
본 연구에서는 국내 생활하수슬러지의 소각시 발생되는 폐기물 중 소각재를 자원화하기 위하여 비산재의 구성성분을 분석하였다. 본 연구에서는 도시지역에서 발생되는 하수슬러지만 소각하는 소각장의 비산재를 대상으로 분석하였다. 기초 물성을 분석하기 위하여 pH와 수분함량, 구성성분, 입자크기 및 표면분석을 실시하였으며, 자원 재활용 여부 판단을 위하여 중금속 분석을 실시하였다. 분석 결과 pH는 평균 6.2, 수분함량은 측정 전/후 5%를 나타냈다. T-N과 T-P2O<sub>5</sub>의 경우 각각 3%와 24.5%가 함유된 것을 확인하였다. 이를 통해 도시지역 하수슬러지의 소각 비산재에는 다량의 T-P2O<sub>5</sub>가 함유된 것을 알 수 있었다. 입자의 평균 크기는 836 nm이었다. XRD (X-ray diffraction)를 측정한 결과, 비산재가 P2O<sub>5</sub>, CaO, MgO, K2O 등의 구성원소를 가지는 것을 확인하였다. 폐기물공정시험기준에 따라 중금속 분석을 한 결과 지정폐기물 분류기준을 초과하는 항목은 없었다. This study characterized fly ash produced from a sewage sludge incineration facility in Korea to determine if the byproducts can be utilized. All the incinerated sewage sludge was from a city in Korea. To characterize fly ash and to determine if it can be utilized, pH, water contents, elemental components, particle size, surface morphology, heavy metal compositions, and others were analyzed. In average, pH was 6.2, and water contents was about 5%. T-N and T-P2O<sub>5</sub> were 3% and 24.5%, respectively. Particle size averaged 836 nm; surface morphology did not exhibit any significant results. X-ray diffraction (XRD) analysis results revealed that major components of the fly ash were P2O<sub>5</sub>, CaO, MgO, K2O. Composition of heavy metals by the Korea Standard Methods for Waste Quality did not exceed the criteria for specified wastes in Korea.
Improved Sensing Scheme to Enhance Read Performance for 3D PCM-OTS Cross-Point Memory
Seong-Beom Kim(김성범),Yun-Heub Song(송윤흡) 대한전자공학회 2020 대한전자공학회 학술대회 Vol.2020 No.8
Phase Change Random Access Memory (PCM) with Ovonic Threshold Switch (OTS) has emerged as a candidate of Storage Class Memory (SCM). However, snapback phenomenon exists in the threshold switching of OTS selector that induces a rapid current called snapback current. This current degrades the read performance of PCM-OTS cell. In this study, an improved pre-charge sensing scheme with additional discharging path is introduced as a solution to reduce the effect of snapback current. The sensing scheme is verified using HSPICE. Several discharge paths are described. Adding discharge path reduces the energy consumption (17%, 12%), sensing time (8%,13%), and peak power level (13%,5%) as compared to the original discharging path.