http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
최성준(Seong-Jun Choi),이재기(Jae-Kee Lee) 한국멀티미디어학회 2010 한국멀티미디어학회 학술발표논문집 Vol.2010 No.1
무선 ad hoc 네트워크는 고정된 기반 망의 도움 없이 이동 단말만으로 구성된 자율구성형 네트워크로 다양한 분야에서 활용되고 있다. 특히 근래에는 교통통신 시스템에서도 활용이 급증하고 있는데 모든 도로에 RSU(Road Side Unit)을 설치하기에는 많은 비용과 시간이 소모되기 때문이다. ad hoc을 이용한 차량 간 통신(Inter-Vehicle Communication)에 많은 방법들이 제시되어 왔다. 무선 ad hoc에서는 노드 이동성의 제약이 없지만 교통에 적용되는 ad hoc 네트워크는 있어 노드(차량) 이동성에 많은 제약이 있다. 본 논문에서는 이런 제약을 가진 이동성을 고려하여 교통사고 방지를 위한 차량 간 통신만을 위한 개선된 AODV 라우팅 프로토콜을 제안 한다. 각 차량은 GPS를 통한 위치정보를 통한 차선정보 획득과 빈번한 단절을 방지하기 위한 가중치 및 교통사고방지를 위한 같은 차선 내 차량 간의 정보 유지를 제안 하였다. 제안하는 AODV 라우팅 프로토콜의 성능은 NS2 시뮬레이터를 사용하여 기존의 AODV 라우팅 프로토콜과 비교하였다.
다구찌법을 이용한 석영의 최적 가공조건 선정에 관한 연구
정호인(Ho-In Jeong),최성준(Seong-Jun Choi),이춘만(Choon-Man Lee) 한국기계가공학회 2022 한국기계가공학회지 Vol.21 No.2
Quartz (SiO2) has high abrasion and heat resistances and excellent chemical and mechanical properties; therefore, it is used in various industries, such as machinery, chemistry, optics, and medicine. Quartz is a high-hardness and brittle material and is classified as the topmost difficult-to-cut material, which is because of the cracking or chipping at the edge during processing. Corner wear, such as cracks and chippings that occur during cutting, is a major cause for the deterioration in the machining quality. Therefore, many researchers are investigating various techniques to process quartz effectively. However, owing to the mechanical properties of quartz, most studies have been conducted on grinding, micromachining, and microdrilling. Few studies have been conducted on quartz processing. The purpose of this study was to analyze the machining characteristics according to the machining factors during the slot machining of quartz using a cubic boron nitride (CBN) tool and to select the optimal machining conditions using the Taguchi method. The machining experiment was performed considering three process variables: the spindle speed, feed rate, and depth of cut. The cutting force and surface roughness were analyzed according to the processing conditions.
한국인 다발성골수종 환자에서 치료에 대한 반응 및 생존기간에 영향을 미치는 예후인자 분석
송헌호(Hun Ho Song),이제환(Je Hwan Lee),박종범(Jong Beom Park),최성준(Seong Jun Choi),김정균(Jeong Kyoon Kim),김성배(Sung Bae Kim),김상위(Sang We Kim),서철원(Cheol Won Suh),이규형(Kyoo Hyung Lee),이정신(Jung Shin Lee),김우건(Woo Kun 대한내과학회 2000 대한내과학회지 Vol.58 No.1
N/A Background : New therapeutic modalities such as high dose chemotherapy and stem cell support have been tried to prolong the survival period of the patients with multiple myeloma. However, little is known about the criteria for the application of those new therapies. There are only a few reports for the prognostic factors of multiple myeloma in Korea. The purpose of this study is to analyze the prognostic factors affecting chemotherapy response and survival in patients with multiple myeloma. Methods : We retrospectively analysed the clinical records of 122 patients who were newly diagnosed as multiple myeloma by SWOG criteria, between November, 1989 and April, 1997 at Asan Medical Center. Results : 1) The peak incidence was the 7th decade and male to female ratio was 1.3:1. The most common presenting symptom at first diagnosis was bone pain. 2) Initial clinical stage was as followed: stage I in 17.2% , stage II in 16.4% and 66.4% in III. The immunoglobulin classes were IgG in 51.6%, light chain only in 25.4%, IgA in 16.4%, IgD in 4.1%, and non-secretory type in 2.5%. Plasma cell types in bone marrow were classified as plasmablastic type in 45.9%, plasmacytic type in 54.1%. 3) Eighty two patients who recieved chemotherapy more than 3 cycles were evaluable for chemotherapy response. Overall response rate was 69.5%. Factors affecting response to chemotherapy were serum creatinine level, plasma cell type, total plasma cell percentage and plasmablast percentasge of total nucleated cells in bone marrow. 4) For total 122 patients, overall median survival period was 21 months, and estimated 5 year survival rate was 23.5%. Factors affecting survival were serum creatinine, corrected calcium, albumin, β2-microglobulin level, response to chemotherapy, total plasma cell percentage and plasmablast percentage in bone marrow. Conclusion : Bone marrow findings at initial diagnosis are significantly associated with response to chemotherapy and survival duration.(Korean J Med 58:83-90, 2000)