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.

화물자동차 운송정보망 구축에 관한 탐색적 연구

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

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 전자공학회논문지SC (System and control) 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.

제2차 세계대전과 유고슬라비아

김철민,Kim, Chul Min 한국외국어대학교 외국학종합연구센터 동유럽·발칸연구소 2000 동유럽발칸연구 Vol.8 No.-

화합의 관점으로 본 보스니아 사회 통합 노력과 실천적 사례 분석

김철민(Kim, Chul-Min) 한국외국어대학교 국제지역연구센터 2018 국제지역연구 Vol.22 No.2

Bosnia has a unique political and social structure of ‘One State-Two Systems’ according to the ‘Dayton Peace Agreement’. It is true that since the end of the 1995 civil war, the problem of nation and peace in Bosnia has been attracted by the broad concept of Europe as a whole, beyond the local dimension of the Balkans. Bosnia is a typical ‘Mosaic of Religion and Culture’ region in Europe. And Sarajevo, the capital of Bosnia, where various religious and cultural features of Europe are gathered, is called ‘Jerusalem in Europe’. For this reason Bosnia has repeated a history of cultural and religious conflict since the Middle Ages. However, before the civil war in the late 20th century, the nations in Bosnia also had experience of ‘harmony among various nations, religions and cultures of East and West’. The international community, including the EU, has paid attention to this point as it promotes Bosnias reconstruction and peace settlement. And these are working to restore the history of harmony among nations in Bosnia today. In the past, research on Bosnia has focused primarily on national conflicts between religions and cultures. However, in this study, I will try to analyze the practical cases of peace settlement and harmony among nations in Bosnia as follows: First, ‘Bosnias accession to the EU’ which means active intervention and continued interest of the international community. Second, ‘the resolution of war crimes and liquidation of past history’ through the end of ICTY mission in December 2017. And third, ‘reflection of international society and historical reconciliation of Serbia’ through the reinterpretation of the Srebrenica massacre.

외세 지배하의 유고슬라비아에 대한 연구 : 오스만 터키 지배 지역을 중심으로

김철민(Kim, Chul-Min) 한국외국어대학교 외국학종합연구센터 동유럽·발칸연구소 2005 동유럽발칸연구 Vol.15 No.1

15세기 오스만 터키가 발칸유럽을 장악한 이후 유고슬라비아 지역내 남슬라브 민족들은 1878년 독립하기 이전까지 약 400여 년간을 오스만 터키의 지배와 그 영향을 받아야만 했다. 이후로 오스만 터키가 이 지역에 남긴 사회, 문화, 정치, 경제적 여러 잔재들과 유산은 아직까지도 유고슬라비아내 각 민족들에게 잔존하고 있으며, 그 영향력이 크다고 할 수 있다. 본 연구에서는 중세부터 근대까지 이어지는 외세 지배 시기와 대상 지역중 ‘오스만 터키 지배하의 유고슬라비아 지역’을 중심으로 살펴보았다. 여기서는 오스만 터키의 유고슬라비아 지역정복 과정과 그 의미를 소개함과 동시에, 오스만 터키 지배 기간중 이 지역내 남슬라브 민족이 경험해야 했던 주요 사회 체계와 경제, 문화적 특징 그리고 남슬라브족의 정신적 구심체 역할을 하여왔던 종교의 역할과 구전문학을 통한 문화적 특정들을 연구하고자 했다. After that Ottoman Turkey occupied Balkan Europe about 15C, South Slav in Yugoslavia was under the influence and control of Ottoman Turkey for about 400 years. So, social, cultural, political and economic remnants of the Ottoman Turkey remains in nations in Yugoslavia to the present. With this view point, in this paper, I analyze about the characteristic and situation of the Yugoslavia which was under Foreign Power, especially with focused on Ottoman Turkey’s territory. In the chapter II, I analyze how Ottoman Turkey conquered Yugoslavia, and what is that’s meaning. In the chapter III, I study main social system of Ottoman Turkey, especially ‘millet’and ‘ devsirme ’. In the chapter IV, I study how effect Religion(Orthodox) in Serbia, and I, at the same time, study cultural characteristic of the phrase literature during that’s period. In the chapter V, I analyze economic system of Ottoman Turkey, especially with focused on ‘timar’ and 'ciftlik’ Finally, in the chapter VI, I summarize once more how much had an effect Ottoman Turkey’s conquer in South Slav in Yugoslavia, and which meaning have this study in study about history of Yugoslavia.

예비체육교사 교육자의 교수능력 함양 중심 수업시연 운영에 관한 셀프연구

김철민(Chul-Min Kim) 학습자중심교과교육학회 2021 학습자중심교과교육연구 Vol.21 No.17

목적 본 연구는 예비체육교사의 교수수행능력 함양을 위한 수업시연의 교육적 의미를 탐색하고, 교사교육자의 수업 반추를 통해 효과적인 수업시연 운영방안을 제시하는데 목적이 있다. 방법 이를 위해, 2019년 2학기 ‘체육교수법’ 과목을 수강하는 행복대학교 체육교육과 예비교사 25명을 연구참여자로 선정하였다. 자료분석을 위해 예비교사의 수업계획서, 한 장 글쓰기, 평가도구 결과, 교사의 수업일지를 수집하였다. 자료는 spradley(1979)의 영역분석과 분류분석 방법으로 분석하였다. 결과 첫째, 구체적인 수업시연 운영방안 안내하기, 온라인을 통해 지속적으로 수업계획서 검토하기, 리허설을 통해 수업계획서 실현 가능성 확인하기의 과정은 예비교사의 철저한 수업준비 능력 함양에 도움이 되었다. 둘째, 학교 현장성을 반영한 수업분위기 조성과 수업루틴에 따라 체계적으로 수업을 진행하며 현장성과 긴장감이 공존하는 수업을 경험하고, 실천 능력을 높일 수 있었다. 셋째, 평가도구로 수업영상 분석하기, 수업 개선방안을 위한 토의와 반성하기를 통해 양적·질적 평가를 반영한 수업시연 운영의 중요성을 알 수 있었다. 결론 이를 통해, 예비체육교사의 교수수행능력 함양을 위한 수업시연 방안과 평가도구의 활용 가능성을 확인하였다. 또한 교사교육자의 반추를 통해 효과적인 수업시연 운영방안을 제시하였다. Objectives The purpose of this study is to explore the educational implications of class demonstrations to cultivate pre-service teachers teaching ability, and to present effective class demonstration management plans through teacher educators class reflection. Methods For this study, 25 pre-service teachers from the Happiness University were selected as participants. For data analysis, the class plan, reflection diary, evaluation result, and teacher s class diary were collected. It was analyzed by Spradley s domain analysis and classification method. Results First, the process of guiding specific class demonstration operation plans, continuously reviewing the class plan online, and confirming the feasibility of the class plan through rehearsal were helpful in cultivating the thorough class preparation ability of the pre-service teacher. Second, classes were systematically conducted in accordance with the creation of a class atmosphere reflecting the school field and class routines. And, I was able to experience classes in which field and tension coexist, and improve practical skills. Third, it was possible to understand the importance of managing class demonstrations through quantitative and qualitative evaluation through analysis and reflection of instructional images as an evaluation tool. Conclusions For this study, it was confirmed the possibility of using the instructional demonstration plan and evaluation tool to enhance the teaching ability of the pre-service physical education teacher. Also, effective instructional demonstration management plan was suggested through the teacher educator s reflection on the class.

동유럽 극우 민족주의의 기원과 특징에 관한 연구: 크로아티아 사례를 중심으로

김철민(Chul-Min Kim) 한국유럽학회 2021 유럽연구 Vol.39 No.4

연구 배경은 동유럽 극우 민족주의 기원과 특징 그리고 그 양상이 서유럽과 차이를 보임에서 출발한다. 본 연구에선 크로아티아를 사례로 서유럽에서의 극우 민족주의가 ‘(역사적) 우월의식’과 그에 따른 혐오에 기초하지만, 동유럽에선 ‘(역사적) 피해의식’에 따른 혐오에 기초함에 주목하고 이를 분석, 확인하고자 했다. 19세기 민족주의 도입 시기, 제국 하 피지배 상태였던 동유럽 민족들은 주로 지배 민족이던 서유럽과 달리 민족-국가 간 경계가 불(不)일치했고, 이것은 주민족과 인종 집단 사이에 극단적 소수민족 대두를 불러왔으며, ‘우리’와 ‘그들’을 구분하는 데 있어 종교와 혈통, 언어 등 문화적 요소에 기초한 ‘문화적 민족주의’ 수립에 기초를 제공했다. 동유럽 민족들이 겪은 역사적 경험과 민족주의 도입 당시 시대적 상황은 동유럽 내 극우 민족주의가 서유럽과 다른 모습으로 발전되는 배경이 되었다. 사회주의 체제로 반세기동안 억눌려왔던 동유럽에서의 극우 민족주의는 20세기말 체제 전환 과정 중 대두된 유고지역 민족 분쟁에 있어 중요 변수로 자리했다. 그리고 이후 이어진 ICTY의 전범 처리 등 국제사회의 단죄 과정과 이를 받아들이지 못하는 현지 민족들의 인식에도 중요한 매개체로 자리하게 된다. 극우 민족주의와 극우 정권의 목소리는 현재까지도 이어져 크로아티아 등 동유럽 각국의 정치, 경제, 사회 속에 깊숙이 내재한 채 일반 대중들 사이에서 큰 힘을 발휘하는 중이다. The research background of this study start from the fact that the origin, characteristics and its aspects of Far-right nationalism in Eastern Europe are different from those of Western Europe. In this study, I noted that while Far-right nationalism in Western Europe is based on a ‘(historical) consciousness of superiority’, in Eastern Europe, it is based on a ‘(historical) consciousness of victim’. And I analyzed Far-right nationalism in Eastern Europe on the basis of this research perspective focusing on the case of Croatia. When Nationalism was introduced in the 19th century, Eastern European peoples were in a subjected under Western Europe, so majority of them were inconsistent with Nation-State boundary unlike Western Europe. Therefore Eastern Europe distinguished ‘We’ and ‘They’ according to the establishing ‘Cultural Nationalism’ based on cultural factors such as religion, lineage and language. And the historical experiences and elements of nationalism which Eastern European peoples were experienced became the background for establishing the origin and characteristics of Far-right nationalism in this area, different from that of Western Europe. The Far-right nationalism in Eastern Europe was suppressed by the Socialist systems for half a century. But this has become an important variable in the regional ethnic conflict that emerged during the System Transition process at the end of the 20th century. And it became an important medium in the process of condemnation by the international community such as ICTY, and in establishing the awareness of local peoples who cannot accept it. The voices of Far-right nationalism and Far-right regimes are still deeply embedded in the politics, economy, and society of Eastern European countries, and are exerting great power among the general public.