한국 언론정책의 비민주성

김경근 성균관대학교 사회과학연구소 1989 社會科學 Vol.28 No.2

부정 내적 공간에서의$H^\infty$ 필터의 일반화를 통한 분산 $H^\infty$ 필터의 설계

김경근,진승희,윤태성,박진배,Kim, Gyeong-Geun,Jin, Seung-Hui,Yun, Tae-Seong,Park, Jin-Bae 대한전기학회 1999 전기학회논문지A Vol.48 No.6

We design the robust and inherently fault tolerant decetralized$$H^infty$$ filter for the multisensor state estimation problem when there are insufficient priori informations on the statistical properties of external disturbances. For developing the proposed algorithm, an alternative form of suboptimal$$H^infty$$ filter equations are formulated by applying an alternative form of Kalman filter equations to the indefinite inner product space state model of suboptimal$$H^infty$$ filtering problems. The decentralized$$H^infty$$ filter that consists of local and central fusion filters can be designed effciently using the proposed alternative$$H^infty$$ filiter gain equations. The proposed decentralized$$H^infty$$ filter is robust against un-known external disturbances since it bounds the maximum energy gain from the external disturbances to the estimation errors under the prescribed level$$r^2$$ in both local and central fusion filters and is also fault tolerant due to its inherent redundancy. In addition, the central fusion equations between the global and local data can reduce the unnecessary calculation burden effectively. Computer simulations are made to ceritfy the robustness and fault tolerance of the proposed algorithm.

DNA 재조합 회복유전자의 특성

김경근 대한핵의학회 1997 핵의학 분자영상 Vol.31 No.4

인체세포주 A431에서 방사선 조사 후 DNA수선 유전자 발현과 세포고사와의 관계

김경근,최근희,범희승,민정준 대한핵의학회 1999 핵의학 분자영상 Vol.33 No.5

鼻骨 側面像의 補助器具를 利用한 撮影法에 관한 硏究

金慶根,兪長壽 대구산업정보대학 1997 논문집 Vol.11 No.2

In the diagnostic radiology of the nasal bone disorder, there are various techniques for the general radiography of the nasal bone projection, but the lateral bone facets are not well demonstrated. So to solve these problems, we manufactured an aid device for the nasal bone lataral view. A nasal bone lateral aid device designed fabricated and applied to radiography has given : 1. The clean image of anatomical mechanism and facilitated in positioning. 2. Time saving in radiography. 3. We gained accurate image better than without aid device.

膵臟의 超音波 檢査에 관한 硏究

金慶根,兪長壽 대구산업정보대학 1997 논문집 Vol.11 No.2

The examination of abdominal organs such as stomach, pancreas, liver and kidney have been made by radiologic studies using contrast media and radio-isotope scan before, but today the utilization of computed tomography and ultrasound is increasing. The computed tomography is not available for the examination of infants in growing periods or pregnant women, for there is a large radiation hazard to the patient. Despite its merits of harmlessness, ultrasound has many limitations in observing the abdominal organs below the gas-filled stomach and intestine, because ultrasound cannot penetrate air and bone on account of its physical characteristics. Livers and gall bladders can be observed with ultrasound with relative success but highly sophisticated skills ara required to scan the pancreas which is located between the stomach and the duodenum. Authors scanned experimental ultrasonic examination. Sonic images obtained in each position after ingestion of water were compared with the general technique. The semi erect (20˚) ingestion water gastro window technique showed further improvement in 10 patients of pancreatic study examization. Using general technique, non visualization of the tail of pancreas occured. In contrast, with semi-erect(20˚) gastro window technique produced improved visualization.

초중등학생의 다문화 수용성에 영향을 미치는 요인

김경근,황여정 한국교육개발원 2012 한국교육 Vol.39 No.1

Using a sample from Seoul Education Longitudinal Survey (SELS), this study explores determinants of multicultural acceptability of elementary, middle, and high school students using the ordinal regression analysis method. The results show that students who are considerate of others, respect the rights of others, and hold egalitarian values tend to have a higher level of multicultural acceptability. In addition, active participation in sports activities and a strong sense of self-efficacy are also closely related with multicultural attitudes. These findings imply that building students’ character and social skills is one of the most important and effective ways to instill in them the appropriate attitudes for living in a multicultural society. In light of these findings, this study suggests that long-term multicultural education programs, rather than short-term programs expecting immediate results, are needed from an early age in order to realize the vision of a socially cohesive multicultural society. 본 연구는 서울교육종단연구 1-2차년도 데이터를 사용하여 초중등학생의 다문화 수용성에 영향을 미치는 요인을 분석하기 위해 수행되었다. 이를 위해 초등학교 5학년, 중학교 2학년, 고등학교 2학년 학생들을 대상으로 서열회귀분석(ordinal regression analysis)을 실시한 결과, 학생들이 타 인종을 개방적이고 관용적인 태도로 받아들이는 데는 타인을 배려하고 타인의 권리를 존중하는 태도, 평등주의 성향, 자아효능감이 중요한 영향을 미치는 것으로 파악되었다. 또한 스포츠 활동에 적극적으로 참여하는 학생일수록 다문화 수용성이 높은 것으로 확인되었다. 이 같은 결과는 우리 학생들이 다문화사회에서 소수집단 구성원들과 더불어 살아가는 태도를 내면화하는 데는 기본적 인성과 사회성을 함양하는 것이 가장 중요하고도 실효성 있는 방안이 될 수 있음을 시사한다. 이를 근거로 다수집단과 소수집단이 서로 어울려 공존하는 다문화사회를 구현하기 위해서는 단기적인 견지에서 계몽적인 교육프로그램을 시행하는 데 급급하기보다는 좀 더 장기적인 관점에서 어린 시절부터 다양한 교육적 경험을 통해 더불어 사는 능력을 내면화시키는 것이 중요하다는 점을 제언하였다.

身體內 異物 位置 撮影에 관한 硏究

김경근,유장수 대구산업정보대학 2000 논문집 Vol.14 No.2

In the diagnostic radiology of the localization foreign body, conventional radiography are various technique. Radiographic foreign body localization is a procedure for determining the presence, and later the position, of any extraneous object or material within the body. For localization of foreign bodies, the radiographic method is the most satisfactory. It permits direct observation of the foreign body, as well as providing a permanent record. There are various methods of foreign body localization, each having its own particular merits. I discovered a new radiographic method. The method are as follows. 1. Arrange the tube and fluoroscopic screen as for ordinary horizontal fluoroscopy. Investigate for presence and position of the foreign body. Direct the path of the CR through the foreign body by narrowing or "closing down" the shutter opening, and mark the skin surface to identify the position of the foreign body. 2. Position the X-ray tube, aligning the CR to the spot marked on the skin surface. Select the most practical FFD. Which maybe 30, 36, or 40 inches, but the exact FFD must be known, at the time of exposure, the exact distance should be indicated on the film by suitable lead marks. (+ type) 3. Position the film beneath the part or area and make an exposure using about one-half to two-thirds of the mAs normally reguired for the part in question. 4. Shift the tube a known distance (about 25 percent of the FFD) cephalad, caudad, or transversely and make a second exposure using the same factors. 5. Process the film in the usual manner. 6. Carefully measure the distance between the two images of the foreign body as projected onto the film. 7. Apply the formula : Foreign body - Film distance =image shift × Focal - film distance/image shift - tube shift 8. Applied small focus and fixed FFD. I resulted used in this radiographic technique. 1. Time saving in radiography. 2. The clean image of foreign body on radiographic image. 3. I gained accurate image better than conventional radiography.

재미한인 민족교육 발전방안에 관한 연구

김경근 안암교육학회 2007 한국교육학연구 Vol.13 No.1

본 연구는 재미한인 사회에 적합한 민족교육 발전방안을 모색하기 위해 수행되었다. 이러한 연구목적을 달성하기 위해 2005년 2월부터 2006년 8월 사이에 미국 내 3개 도시에 거주하는 한글학교 교장, 학부모, 학생들과 심층면접을 실시하고, 재외한인 민족교육 전문가들과 간담회도 가졌다. 재미한인 민족교육이 봉착하고 있는 핵심적인 문제점으로는 민족교육에 대한 동기부여 또는 자발성 결여, 열악한 교육여건, 적절한 교육자료 및 유능한 교사의 부족 등으로 판명되었다. 이와 같은 문제점을 해소하고 민족교육을 진흥시키기 위해서는 한국 방문 프로그램의 활성화, 다양한 민족교육 프로그램 및 교육자료의 개발, 한국 내 취업기회의 확대를 통한 민족교육에 대한 동기부여 강화, 민족교육기관간 네트워크 강화, 그리고 민족교육 지원 행정의 체계화 등이 요망되는 것으로 보인다. This study attempts to explore a development plan of ethnic education suitable for Koreans living in the United States. To map out the development plan, I conducted in-depth interviews with the administrators of Korean language schools, parents, and students of three U.S. cities, and held a meeting with specialists about overseas Koreans from March to August, 2006. The problems of ethnic education raised by the Korean American community are lack of both motivation and spontaneity of ethnic education, poor educational conditions, and shortage of competent teachers and available teaching materials. Thus, in order to resolve such difficulties with ethnic education, the ethnic education model for Koreans living in the United States should be centered around cooperation between the Korean Americans and the Korean government about motivation of Korean Americans, vitalization of Korea visit program, development of ethnic education programs and various teaching materials, enlargement of employment opportunity in Korea, networking between ethnic education institutes, and systemization of ethnic education works.

자기공명영상 촬영에서 발생되는 정자장 인공물의 분석

김경근,박종시 대구산업정보대학 2000 논문집 Vol.14 No.2

There are many gradient field artifact in using magnetic resonance imaging. But the static magnetic field artifact out of magnetic resonance are: 1) The main magnetic field from unqualeness of main magnetic resonance : The main magnetic field which is generated by imperfection of main magnetic resonance. 2) Ferromagnetic artifact : The field artifact by the phenomenon of distortion of signal which is reformed from equal magnetic field to unequal magnetic field. 3) Susceptibility Artifact : The field artifact which is generated by the partial transformation gradient magnetic artifact in the border line of two structure which have different susceptibility. The results of image out of gradient field artifacts are intention of signal, shortage of signal, distortion etc. Therefore we must removed magnetic material from the patient or must use non-magnetic material because it is mainly happened the distortion of image owing to metal material. In addition we must decrease gradient field artifact by using several practical assisting method about self-decreasing gradient field artifact.