http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Chul Min Kim(김철민) (검색결과 230 건)
- 무료
- 기관 내 무료
- 유료
-
다양한 산화물들이 리튬규산염 유리의 결정화에 미치는 영향
김철민,임형봉,김용수,김세훈,오경식,김철영,Kim, Chul-Min,Lim, Hyung-Bong,Kim, Youg-Su,Kim, Se-Hoon,Oh, Kyung-Sik,Kim, Cheol-Young 한국세라믹학회 2011 한국세라믹학회지 Vol.48 No.4
Glass-ceramics based on lithium disilicate($Li_2Si_2O_5$) are prepared by heat-treatment of glasses in a system of $SiO_2-Li_2O-K_2O-Al_2O_3$ with different compositions. The crystallization heat-treatment was conducted at the temperature range of $700{\sim}900^{\circ}C$ and samples were analyzed by XRD and SEM. Mechanical properties were determined by a Vicker's hardness and 4 point bending strength. When $SiO_2/Li_2O$ ratio increased, cristobalite and tridymite crystals showed more predominate than lithium disilicate crystals. Increase in $Al_2O_3$ contents in the glass suppressed crystallzation of lithium disilicate crystals. Increase in ZnO, $B_2O_3$ contents in the glass decreased crystallization temperature of lithium disilicate crystals, and increased mechanical properties because of the reduction of the lithium disilicate crystal size.
-
김철민Chul-Min Kim) 한국국제상학회 2010 國際商學 Vol.25 No.2
Domestic cargo trucking transportation service industry has been suffering from too much excessive supply and one of the reasons was the unadequate government policy. 'This hard environment causes truck drivers' transportation veto from 2003 and serious danmge to the Korean economy. Recently, the proposition of a cargo trucking service transportation law which is submitted to the Korea national assembly in 2009 can be an effective alternative for the innovation of the old and inefficient cargo trucking transportation industry. According to the above law proposition, trucking company and trucking mediation agencies should use the cargo trucking information networking system which can be cargo trucking franchise companies or information systems certified by the Korean government. This research compared the needs for the trucking information networking system among truck drivers, trucking and service mediating agencies, and forwarders by the survey methodology. Research results suggest tllat the information networking system should be developed by the regional base, not the whole country base. Survey research also suggests tllat the various trucking transportation associations in Busan should participate in the developing and operating of the new system
-
원인 불명의 실신 환자의 진단에 있어서 Head - up tilt Test 의 유용성과 혈관미주신경성 실신 환자의 임상적 특징
윤호중(Ho Joong Youn),정욱성(Wook Sung Chung),백상홍(Sang Hong Baek),김철민(Chul Min Kim),박인수(In Soo Park),김재형(Jae Hyung Kim),최규보(Kyu Bo Choi),홍순조(Soon Jo Hong) 대한내과학회 1994 대한내과학회지 Vol.47 No.2
N/A Background: Syncope, defined as a transient loss of consciousness, is a frequently encountered symptom, but despite thorough clinical and invasive diagnostic investigation, the cause of syncope remains unexplained. In recent years, head-up tilt test has been of increasing interest as a diagnostic aids in patients with unexplained syncope. We studied to define the usefulness of various diagnostic test in the evaluation of patients with recurrent syncope, to assess the usefulness of head-up tilt test in the working of syncope of unknown origin and to evaluate the clinical characteristics of subgroups of patients with syncope induced by head-up tilt test. Methods: Between June, 1991 and November, 1992 at St. Mary`s hospital, 21 patients with history of syncope and 24 control subjects without history of syncope underwent 60° head-up tild test for 60 min. Results: 1) The definite cause for recurrent syncope were diagnosed in 10 of patients (47,6%) after clinical and invasive tests. 2) During head-up tilt test, vasovagal responses were provoked in 5 of 21 patients (23.8%) with recurrent syncope and 1 of 24 patients (4.2%) without syncope (p<0,05). 3) The head-up tilt test induced symptomatic bradycardia or hypotension in 3 of 10 patients (30%.) with negative electrophysiologic results. 4) During tilt induced vasovagal response, a) mean heart rate decreased to 42±24 beat/min from supine control of 70±12 beat/min (p<0. 05), b) mean systolic blood pressure decreased to 95±12 mmHg from supine control of 120±S mmHg (p<0,05), c) mean diastolic blood pressure decreased to 60±21mmHg from supine control of 72±13 mmHg (p<0.05), d) the time interval to onset of vasovagal response was 22±12 min. Conclusions: 1) In a large proportion of patients with recurrent syncope, the diagnosis remains unexplained despite a neurologic and cardiologic investigation including an electrophysiologic study. 2) Vasovagal responses are frequent cause in patients with recurrent unexplained syncope. 3) The head-up tilt test may be a simple, safe and highly yielding provocative test in the investigation of syncope of unknown origin.
-
MPEG-2 비디오 디코더 적합성 검사용 비트열의 제작
김철민,이병욱,박래홍,Kim, Chul-Min,Lee, Byung-Uk,Park, Rae-Hong 대한전자공학회 1999 電子工學會論文誌, S Vol.s36 No.10
MPEG-2 비디오 표준에서는 다양성을 보장하기 위하여 많은 변수들을 조절할 수 있다. MPEG-2 비트열을 통하여 전송되는 이러한 변수들이 MPEG 비디오 디코더에서 올바르게 해석되어, 전송한 것과 동일한 영상이 수신기에서 재생되는지 확인하여야 한다. 본 논문에서는 검사할 디코더의 최정화면을 관측하여 MPEG 비디오 디코더의 정상 동작 여부를 간편하게 확인할 수 있도록 검사용 비트열을 설계하는 방식을 제안하였다. 제작된 비트열의 내부는 두 부분으로 구성된다. 하나는 검사할 변수를 변화시키며 검사 패턴을 만드는 부분이고, 다른 하나는 MPEG의 움직임 보상과 discrete cosine transform(DCT) 계수를 이용하여 이전 프레임에서 만들어진 검사 패턴을 상쇄시키는 부분이다. 이러한 원리를 적용하여 검사용 비트열을 제작하였고 스프트웨어 디코더로 분석한 결과를 제시하였다. In MPEG-2 video standard, there are many parameters to support profiles and levels. It is necessary to verify that a decoder is compliant with the MPEG-2 standard. This paper proposes a design principle of the test bitstreams which confirms that an MPEG video decoder is correct by observing the final image of the decoder under test. The presented test bitstream is composed of two parts. The first part generates a test pattern by varying a selected test parameter. And the following predictive coded picture generates a complementary pattern to the previous image by motion compensation and DCT coefficients. Then it will result in a uniform pattern. We present several bitstreams following the proposed principle. Also we analyze and compare the characteristics of the test bitstreams presented in the MPEG conformance test and the proposed test bistreams.
-
-
시뮬레이션을 통한 압전형 초음파 스케일러 개발 및 평가
김철민,이영진,백종후,정영훈,강국진,이정배,이승대,Kim, Chul-Min,Lee, Young-Jin,Paik, Jong-Hoo,Jeong, Young-Hun,Kang, Kook-Jin,Lee, Jeong-Bae,Lee, Seung-Dae 한국전기전자재료학회 2009 전기전자재료학회논문지 Vol.22 No.10
A piezoelectric ultrasonic scaler, usually used to remove the tartar out of teeth and to amputate the pubis, is a recently popular instrument for dental treatment due to its several merits such as small size, low-electric power, precision and low-cost. It has typically two parts of a tip and vibration system, which is also composed of head, piezoelectric elements and tail-mass. The scaler concentrates its displacement on tip and has commonly a resonance frequency at 25~30 kHz, and in order to improve the performance of the scaler, it is important to standardize the size of the vibration system without tip for high performance because scaler in quality differs according to several tips. In this study, a Finite Element Analysis (FEA) was utilized to optimize the structure of ultrasonic scaler in the vibration system. Consequently, this study revealed that influence of several tips on property were minimized and scaler showed good property at the resonance frequency of 28 kHz.
-
유고 지역내 세르비아 소수 민족 형성 배경에 관한 연구
김철민(Chul-Min, Kim 한국외국어대학교 외국학종합연구센터 동유럽발칸연구소 2009 동유럽발칸연구 Vol.22 No.1
20세기말 유고 지역에서 크로아티아 내전과 보스니아 내전이 발발한 이후 이 지역내 세르비아 소수 민족 문제는 발칸유럽의 안정과 평화의 주요 척도로써 인식되어 왔다. 이러한 연구 배경을 바탕으로, 본 논문에서는 현지 학계에서 발표된 크로아티아내 세르비아 소수민족 문제에 대한 연구 및 분석을 국내에 소개하고, 이를 통해 유고 지역내 세르비아 소수 민족 문제 및 그 형성 배경을 크로아티아를 사례로 분석하고자 했다. 본 논문의 구성은 우선 제 2장에서는 유고 지역내 소수민족의 범주를 크게 3가지, 즉 헝가리, 알바니아 그리고 세르비아 소수민족으로 나누어 그 특징과 내용을 분석해 보았다. 이중 본 논문에선 3번째 범주인 세르비아 소수 민족을 연구하고자 했으며, 사례 지역으로는 크로아티아를 선택해 그 형성 배경에 대해 분석해보고자 했다. 이를 기초로, 제3장에선 크로아티아내 세르비아 소수민족이 형성되게 된 배경을 역사적 사건 별로 3가지 배경으로 나누어 분석하고자 했다. 첫째로는 크로아티아 중세 왕국의 몰락과 1102년 이후 헝가리로의 영토 편입 배경이 훗날 오스만 터키의 유럽 침공과 더불어 세르비아인들의 크로아티아로의 이주 및 크로아티아의 합스부르크 제국으로의 편입을 낳았다고 제시하게 될 것이다. 두 번째로는 합스부르크 제국의 오스만 터키 방어정책이 크로아티아내 세르비아 소수 민족 형성에 중요한 영향을 미쳤다는 점을 제시하며, 그 의미와 결과에 대해 설명하고자 했다. 세 번째로는 합스부르크 제국과 오스만 터키 제국 간에 체결한 스렘스키 카를로브찌(Sremski karlovci) 조약과 보이나 그라니짜(Vojna granica)의 형성을 주요 요인으로 설정해 그 내용을 분석할 것이다. Studies of the formation of Serbs as an ethnic minority group in Croatia has interested both Serbian and Croatian scholars. In particular, the Civil wars in Croatia and Bosnia that took place in the late twentieth century have sparked international communities' enduring interest in the Serbian ethnic group in the Balkan. Such an interest reflects the awareness that, though it's been ten years since the Civil wars ended, Serbia ethnic groups still remain a volatile problem that might endanger the peace of the region. That is, Montenegro's formal declaration of independence in June 2006, and Kosovo's effort to follow the same route, as which declared independent state in February 2008, can unsettle the Serbian minority of the region who are extremely loyal to their ethnic identity and pride. In this paper, aware of the significance of these events, I will examine the question of the Serbian minority group in Croatia, especially in terms of the historical and social background behind their formation. At first, I will analyze about the problem and present situation Serbian minority in the area of Yugoslavia. And then, in the chapter two. I will explain the background of formation of Serbina minority in Croatia in terms of three reasons as this following. The first is the fall of Croatian medieval kingdom and the expansion of Ottoman Turkey in the Balkan. The second is the protective strategy of Habsburg empire on Croatia and Europe. Finally, the third is the treaty of Sremski karlovci and the Vojna granica along the borders between the Ottoman and the Habsburg.
-
-
-
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
