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 : 정일봉 (검색결과 38 건)
- 무료
- 기관 내 무료
- 유료
-
-
정일봉,이우영 대한수학회 2001 대한수학회논문집 Vol.16 No.1
복소힐버트 공간상에서 정의된 작용소 중에서 최근 많이 연구되는 분야는 부분정규작용소와 초정규작용소들 들 수 있다. 본 논문에서는 작용소의 부분정규성과 초정규성 사이에 있는 작용소의 여러 성질을 살펴보고 특히 $\textsc{k}$차초정규, 이차약초정규, 삼차약초정규, 다항초정규, 토에플리츠작용소 및 약부분정규작용소에 관한 최근의 연구 결과들을 살펴보며 이와 관련되 미해결 문제들을 제시한다. 마지막으로 틈이론의 응용으로서 작용소이론의 큰 문제인 불변공간문제와의 관련성을 살펴보고 틈이론의 전망과 기타 관련정보를 소개한다.
-
정일봉(I. B. Chung),조성근(S. K. Cho) 한국도시철도학회 2014 한국도시철도학회논문집 Vol.2 No.3
As Seoul Subway Line 2, a circular line playing a key role in public transportation in the Capital city Seoul, transports more than 2 million passengers daily with 20 transfer stations providing links to 9 other lines in Metropolitan area, the overall congestion by the growing number of its users during rush hours is on the rise with frequent delays in train operation mostly due to the longer alighting and boarding times. In this regard, passenger transport is being disrupted as passenger complaints are building, and yet it is not straightforward to efficiently mitigate congestion by establishing optimal train operation plans even taking into account the fact that there might be problems taking immediate actions in case of emergency. The study came up with optimum management plans that can apply to the actual train operation through step-by-step test run in order to eliminate the factors causing a delay and to decrease congestion.
-
정일봉,박길용,이강길 大韓成形外科學會 1988 Archives of Plastic Surgery Vol.15 No.3
Cryptotia is a rare anomaly in caucasians, but more common in orientals. This congenital anomaly is an abnormal adherence of the upper part of the auricle to he head, and it has been called "Pocket ear". In cryptotia there is often a deformity of the antihelix, especially its superior crus. The key points of surgery are (1) to cover the skin defect on the posterior aspect of the ear after it is released from the head, and (2) to repair the cartilaginous deformity. We have repaired 4 cryptotic deformities in two patients with aesthetically satisfactory results using Ishii method and advancement of scalp flap.
-
열차의 효율적 운영을 통한 동력비 절감방안에 관한 연구 : 서울메트로를 중심으로
정일봉(Chung Il-Bong),박정수(Park Jeong-Soo),김후규(Kim Hoo-Kyu) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
The annual power cost for Seoul metro operations is about 65.5 billion won, of which rail motors account for 60% among total power consumptions. It is expected that the power consumption would increase because of global warming, future high electric equipments demands, etc. To reduce these consumptions, it is necessary to analyze the transportation demands of passengers, arrange the power-saving driving environments, respond flexible vehicles service, and improve how to drive vehicles. These method to reduce power consumption for rail motors can lead to improve the Seoul metro management. In this research, the improvement plan is derived by collecting and analyzing the data for total 33 power consumptions factors, screening top 10 factors by priority and impact, establishing each hypothesis to execute correlation and recursion analyses. As a result of 4 items research among top 10 affected factors, the power consumption for rail motors in 2006 is effectively reduced; the power usage is down with 13,870 kwh, from 531,539 kwh to 517,669 kwh, and the cost is down with 1,026 million won, from 39, 334 million won to 38,308 million won.
-
정일봉(Chung Il-Bong),신택현(Sin Tack-Hyun) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
A subway with its several positive characteristics such as safety, speed, and timeliness has made it to take a pivotal role in urban transportation. However it can cause a severe damage in case of disruption in train services. Owing to their vulnerable work conditions, that is, routinized working alone in a closed space, based on the irregular work and commuting schedule, the drivers are always suffering from the burden of safe running, which could not only cause them severe physical as well as mental fatigue, but also feel difficulties in maintaining a steady circadian biorhythm. Even though continued studies on systematic factors have been conducted for the safe operation of subways, the researches for the optimization of roster scheduling of subway drivers are so rare. The main purpose of this study is to depict the critical factors described above, and to suggest some effective alternatives to solve the problems, focusing on the computerized system for the optimum labor scheduling.
-
정일봉(Il-Bong Jung),안석출(Suk-Chul Ahn),남수용(Su-Yong Nam) 한국청정기술학회 2008 청정기술 Vol.14 No.1
본 연구에서는 LCD 컬러필터에 사용되는 밀베이스를 제조하기 위해 Red, Green, Blue안료 분산에 대한 특성을 연구하였다. 또한 기존의 포토리소그라피 방법을 대체할 수 있는 스크린 인쇄 방식에 적용할 수 있도록 물성 및 점도를 맞추었다. 분산제는 BYK-2000, 모노머는 EB-140이 가장 우수한 분산 특성을 나타내었다. Torus mill을 사용하여 millbase를 500 rpm으로 30 min 동안 pre-mixing한 뒤, 4000 rpm으로 5~6시간 분산시켜서 Red 100~110 ㎚, Green 50~70 ㎚, Blue 60~80 ㎚의 분산 결과를 얻을 수 있었다. 저점도 type 포물레이션에서 millbase의 점도가 200~300 cps 일 때 비드의 충격력이 충분히 발휘 되었으며, 레오로지 거동 및 색특성을 통하여 분산성이 확보되었음을 확인하였다. The properties of the dispersion of the red, green, and blue pigments were investigated for the manufacture of the millbase of LCD color filters. Their physical properties and viscosity were controlled to apply to the screen printing in order to substitute the existing photolithography method. The best dispersion properties were obtained with dispersant BYK-2000 and monomer EB-140. The millbase was pre-mixed at 500 rpm for 30 min, and dispersed at 4000 rpm for 5 - 6 hour by Torus Mill. The resulting particle sizes were 100 110 ㎚ for red, 50 70 ㎚ for green, and 60 80 ㎚ for blue. When the millbase viscosity was 200 - 300 cps in the low viscosity formulation, an efficient impact of the beads on pigments was achieved. The dispersion properties were confirmed from the rheological behavior and color characteristics.
-
정일봉(I. B. Chung),조성근(K. S. Cho) 한국도시철도학회 2013 한국도시철도학회논문집 Vol.1 No.3
As Seoul Subway Line 2, a circular line playing a key role in public transportation in the Capital city Seoul, transports more than 2 million passengers daily with 20 transfer stations providing links to 9 other lines in Metropolitan area, the overall congestion by the growing number of its users during rush hours is on the rise with frequent delays in train operation mostly due to the longer alighting and boarding times. In this regard, passenger transport is being disrupted as passenger complaints are building, and yet it is not straightforward to efficiently mitigate congestion by establishing optimal train operation plans even taking into account the fact that there might be problems taking immediate actions in case of emergency. The study came up with optimum management plans that can apply to the actual train operation through step-by-step test run in order to eliminate the factors causing a delay and to decrease congestion.
-
-
On Von Neumann Algebras with Properties(A_m,n)
Jung, Il Bong,Jo, Yong Soo 慶北大學校 1990 論文集 Vol.50 No.-
Von Nuemann algebra의 전 상대 공간상의 연립 방정식을 연구하여 Von Nuemann algebra의 구조를 분류한다.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
