완전 뇌량무형성

김정준 ( Kim Jeong Jun ),신철수 ( Shin Chul Su ),윤창수 ( Yun Chang Su ),김성미 ( Kim Seong Mi ),김창수 ( Kim Chang Su ),배국환 ( Bae Gug Hwan ),한광수 ( Han Gwang Su ),박정실 ( Park Jeong Sil ),주재영 ( Ju Jae Yeong ) 대한산부인과학회 2003 Obstetrics & Gynecology Science Vol.46 No.7

The corpus callosum is the main interhemispheric connection in human brain. Agenesis of corpus callosum may partial or complete, and it may have not functional abnormalities. Its prenatal sonographic diagnosis is difficult because of fetal head position, especially in a cephalic presentation. We experienced a case of complete agenesis of corpus callosum. The prenatal sonographic findings was disproportionate dilatation of lateral ventricle, which were suggestive finding of agenesis of corpus callosum or hydrocephalus. We could confirm the diagnosis of complete agenesis of corpus callosum by postnatal MRI.

메인 메모리 다차원 인덱스를 위한 효율적인 MBR 압축 기법

김정준,강홍구,김동오,한기준,Kim, Joung-Joon,Kang, Hong-Koo,Kim, Dong-Oh,Han, Ki-Joon 한국공간정보학회 2007 한국공간정보시스템학회 논문지 Vol.9 No.2

최근 실시간 서비스의 요구 사항을 갖는 위치 기반 서비스와 텔레매틱스 서비스를 효율적으로 제공하기 위해서 공간 메인 메모리 DBMS에 대한 관심이 급증하고 있다. 이러한 공간 메인 메모리 DBMS에서 기존의 디스크 기반 다차원 인덱스들을 메인 메모리에 최적화하기 위해 엔트리 크기를 줄여 캐시 접근 실패를 최소화한 다차원 인덱스 구조들이 제안되고 있다. 그러나 엔트리 크기를 줄이기 위하여 부모 노드의 MBR을 기준으로 압축하거나 중복된 MBR을 제거하기 때문에 인덱스 갱신 시 MBR 재구성 비용이 증가하고 인덱스 검색 시 효율이 떨어지는 문제점이 있다. 본 논문에서는 MBR 재구성 비용을 줄이기 위하여 넓은 분포의 경우와 좁은 분포의 경우로 나누어 압축 기준점을 다르게 적용하는 RSMBR(Relative-Sized MBR) 압축 기법을 제시하였다. RSMBR 압축 기법은 넓은 분포일 경우 부모 노드 확장 MBR의 좌하점을 기준으로 압축하고, 좁은 분포일 경우 전체 MBR을 일정 크기의 셀로 나누고 각 셀의 좌하점을 기준으로 압축한다. 또한 인덱스 검색 시 검색 비용을 줄이기 위하여 상대 좌표와 크기를 이용하여 MBR을 압축한다. 마지막으로, 본 논문에서는 실제 데이타를 통한 성능 평가를 수행하여 RSMBR 압축 기법의 우수성도 입증하였다. Recently there is growing Interest in LBS(Location Based Service) requiring real-time services and the spatial main memory DBMS for efficient Telematics services. In order to optimize existing disk-based multi-dimensional Indexes of the spatial main memory DBMS in the main memory, multi-dimensional index structures have been proposed, which minimize failures in cache access by reducing the entry size. However, because the reduction of entry size requires compression based on the MBR of the parent node or the removal of redundant MBR, the cost of MBR reconstruction increases in index update and the efficiency of search is lowered in index search. Thus, to reduce the cost of MBR reconstruction, this paper proposed the RSMBR(Relative-Sized MBR) compression technique, which applies the base point of compression differently in case of broad distribution and narrow distribution. In case of broad distribution, compression is made based on the left-bottom point of the extended MBR of the parent node, and in case of narrow distribution, the whole MBR is divided into cells of the same size and compression is made based on the left-bottom point of each cell. In addition, MBR was compressed using a relative coordinate and size to reduce the cost of search in index search. Lastly, we evaluated the performance of the proposed RSMBR compression technique using real data, and proved its superiority.

공간 HBase : 공간 빅 데이터를 위한 HBase 확장

김정준(Jeong-Joon Kim),한성근(Sung-Geun Han),신인수(In-Su Shin),한기준(Ki-Joon Han) 한국정보과학회 2013 정보과학회논문지 : 데이타베이스 Vol.40 No.5

최근에 용량이 크고 다양한 속성을 가진 공간 데이터는 빅 데이터의 일부분으로 취급받고 있으며, 이러한 공간 빅 데이터는 중요한 연구 분야로 급부상하고 있다. 그러나, 기존의 연구들은 대부분 NoSQL이 아닌 분산 파일 시스템을 이용하여 공간 빅 데이터를 처리하고 있기 때문에 빈번한 데이터 삽입과 갱신이 발생하는 환경에서 처리 비용이 증가하는 단점이 있다. 따라서, 본 논문에서는 최근 가장 많이 활용되고 있는 NoSQL인 하둡의 HBase를 확장하여 공간 HBase를 개발하였다. 공간 HBase는 빈번한 데이터 삽입과 갱신시 처리 비용이 적은 기존 HBase의 장점을 그대로 사용하고 있으며 OGC의 공간 데이터 타입과 공간 연산자를 지원한다. 그리고 공간 HBase는 위치 기반으로 공간 데이터를 클러스터링하여 저장하고 공간 데이터 검색시에는 공간 인덱스를 이용하여 분산 처리하기 때문에 효율적으로 공간 질의 처리를 수행할 수 있다. 마지막으로, Oracle Spatial Cluster와 비교 성능 평가를 수행하여 본 논문에서 개발한 공간 HBase의 우수성을 검증하였다. Recently, spatial data with large capacity and various properties is treated as a part of Big Data, and this spatial big data is emerging as an important field of studies. However, since existing studies to process spatial big data are mostly based on the distributed file system, rather than on NoSQL, there is a disadvantage of increasing the processing cost in an environment with frequent data inserting and updating. Thus, this paper has developed Spatial HBase based on HBase of Hadoop which is NoSQL that is the most widely used in recent years. Spatial HBase has the advantage of the basic HBase that carries low processing cost to frequent data inserting and updating. In addition, it supports spatial data types and spatial operations in OGC. Also, Spatial HBase can perform spatial query processing efficiently because spatial data can be stored with the location-based clustering and at the time of searching for spatial data, distributed processing using a spatial index is conducted. Finally, the superiority of Spatial HBase was proved by performing a comparative performance evaluation between Spatial HBase and Oracle Spatial Cluster.

영산의 4차원의 영성과 영성교육적 과제

김정준 ( Kim Jeong Joon ) 한세대학교 영산신학연구소 2010 영산신학저널 Vol.18 No.-

Historically, Most of christian leaders and theologians in the world give attention and research the pentecostal spiritual movement and its excellent leader Dr. Yonggi Cho, Youngsan and his spirituality and ministry at Yoido Full Gospel Church to the turning point of revival movement in christianity under which western church has decreased the numbers of believers and stagnated the church growth in the 20th century. The theological key word The Fourth Dimension Spirituality representatives Youngsan’s spirituality. Especially we should give attention that Youngsan’s the fourth dimension spirituality and his theology are not theoretical theology, but empirical theology through his life and ministry. Hence I try to research Youngsan’s the fourth dimension spirituality by spiritual theology with empirical method focused on his life and ministry, not theoretical theology with method traditionally. Then, How can we reconstruct Youngsan’s the fourth dimension spirituality in spiritual education with the well-known developmental psychologist ErikH. Erikson’s theory of the Eight Ages of Man in perspective. I tried to reconstruct meanings of Youngsan’s the fourth dimension spirituality related to all his life and ministry based on Erikson’s the Eight Ages theory, and I also suggested some tasks of spiritual education for future generations. Erikson payed attention that Man should achieve his developmental tasks and definite ego identity before crisis in his life cycle. In the course of life time, Man should develop his positive aspect in psychological mode related with spiritual growth and development. It needs to understand two kinds of educational dimension for christians to form Youngsan’s the fourth dimension spirituality. One is a kind of theological dimension. First of all, it needs personally and experientially an acception of Jesus Christ as my Lord under the grace of the Holy Spirit for forming Youngsan’s the fourth dimension spirituality. Other is a kind of psychological dimension within all Younsan’s life responsed to grace of God. It means to need a experiential knowing for christian learners under the light of the Holy Spirit who want to form a Youngsan’s the fourth dimension spirituality. And the same time He who wants to form a Youngsan’s the fourth dimension spirituality should pay attention to develop their psychological positive mode in their life cycle. In Conclusion, we should remember that Youngsan’s the fourth dimension spirituality is a spiritual principle and principle of life that is made by the struggle of the soul in all Younsan’s life, and also is made by deep fellowship in a long time between Youngsan and the Holy Spirit.

고지방식이 마우스에서 콩잎추출물의 지방간 억제 효과

김소라(So Ra Kim),제지현(Ji hyun Je),정준연(Jun Yeon Jeong),김현정(Hyun Jung Kim),송영훈(Yeong Hun Song),박기훈(Ki Hun Park),강상수(Sang Soo Kang),박상원(Sang Won Park) 대한약학회 2017 약학회지 Vol.61 No.3

This study was designed to investigate the effect of soybean leaf extract on the development of hepatic steatosis in high fat diet-fed mice. Soybean plants were treated with ethephon to enhance the production of isoflavones in the leaves. The mice were fed with normal chow diet(ND), high fat diet(HFD) or HFD+Soybean leaf extract for 9 weeks. HFD feeding significantly increased the body weight gain and visceral and subcutaneous adipose tissue weights compared to ND group in the mice, but these increases were attenuated by Soybean leaf treatment. Soybean leaf also attenuated the increases in hepatic lipid droplet and hepatocellular triglyceride level at 64 days of HFD feeding. Finally, soybean leaf markedly increased the phosphorylation of AMPK and ACC and their protein expression in the liver at 64 days of HFD feeding, while inhibited the increase in fatty acid synthase protein expression. Our results indicate that soybean leaf extract has beneficial effects against hepatic steatosis in HFD-fed mice.

2.14-GHz 대역 고효율 Class-F 전력 증폭기 개발

김정준,문정환,김장헌,김일두,전명수,김범만,Kim, Jung-Joon,Moon, Jung-Hwan,Kim, Jang-Heon,Kim, Il-Du,Jun, Myoung-Su,Kim, Bum-Man 한국전자파학회 2007 한국전자파학회논문지 Vol.18 No.8

본 논문에서는 Freescale사의 Si-LDMOSFET 4-W 소자를 이용하여 고효율 class-F 전력 증폭기를 구현하였다. Class-F 전력 증폭기를 구현하는데 있어서 모든 하모닉 성분들에 대해 원하는 임피던스를 갖도록 조정하기는 불가능하기 때문에 2차와3차 하모닉 성분만을 조율하여 회로의 간결함과 동시에 상대적으로 높은 효율을 얻을 수 있었다. 또한, 본 논문에 설계된 증폭기는 보다 정확하게 하모닉 성분을 조율하기 위해, LDMOSFET의 대신 호 등가 모델에서 가장 큰 영향을 미치는 drain-source capacitance(Cds)와 bonding inductance(Lb)를 추출하여 하모닉 조율 회로를 설계하였다 제작된 고효율 class-F 전력 증폭기의 측정 결과 drain-efficiency(DE) 65.1%, power-added-efficiency(PAE) 60.3%의 효율을 얻을 수 있었다. We have implemented a highly efficient 2.14-GHz class-F amplifier using Freescale 4-W peak envelope power(PEP) RF Si lateral diffusion metal-oxide-semiconductor field effect transistor(LDMOSFET). Because the control of the all harmonic contents is very difficult, we have managed only the $2^{nd}\;and\;3^{rd}$ harmonics to obtain the high efficiency with simple harmonic control circuit. In order to design the harmonic control circuit accurately, we extracted the bonding wire inductance and drain-source capacitance which are dominant parasitic and package effect components of the device. And then, we have fabricated the class-F amplifier. The measured drain and power-added efficiency are 65.1 % and 60,3 %, respectively.

동력전달장치 개요

김정준(Jungjun Kim),임채홍(Chaehong Lim) 한국자동차공학회 2007 오토저널 Vol.29 No.5

김해문화의전당의 사례를 통한 다목적홀의 음향설계

김정준(Jeong Jun Kim),류종관(Jong Kwan Ryu),김용희(Yong Hee Kim),전진용(Jin Yong Jeon) 한국소음진동공학회 2008 한국소음진동공학회 학술대회논문집 Vol.2008 No.11

관광동기와 관여도에 따른 관광목적지 매력성 연구

김정준 ( Jeong Jun Kim ),류인평 ( In Pyoung Yoo ) 관광경영학회 2010 관광경영연구 Vol.44 No.-

This study aimed at exploring the relationships of tourist`s motivation and involvement on a destination`s attractiveness by examining the five hypotheses derived from the related literature review. The results showed that tourist`s motivation had a positive influence on the level of involvement and the attractiveness of tourist destination, whereas physical motivation was found to have a negative influence on tour conditions. The level of involvement had a positive relationship with the attractiveness of tourism destination and tourist`s motivation, however, the level of importance was found to have a negative influence on tour conditions. The attractiveness of tourism destination was found to have a positive influence on satisfaction and intention to revisit while the satisfaction had a positive impact on intention to revisit. One limitation of this study to be addressed was that the study did not target the more specific and segmented markets. Second, this study sampled both domestic and overseas tourists for the purpose of convenience of sampling and market analysis. Therefore, in the future research further efforts should be made to develop more systematic framework by sampling specific targets at a specific destination for generalization of findings.

모바일 장치를 위한 공간 MMDBMS의 설계 및 구현

김정준(Jung-Joon Kim),강홍구(Hong-Koo Kang),윤재관(Jae-Kwan Yun),한기준(Ki-Joon Han) 한국정보과학회 2004 한국정보과학회 학술발표논문집 Vol.31 No.2Ⅱ

최근에 무선 인터넷과 이동 컴퓨팅 기술이 발전하고, 휴대 전화, PDA와 같은 이동 단말기가 보편화됨에 따라 사용자의 위치 정보를 활용하는 위치 기반 서비스(LBS : Location Based Service)가 다양한 분야에서 제공되고 있다. 모바일 환경에서 위치 기반 서비스를 제공하기 위해서는 모바일 장치에서 대용량의 공간 데이타를 신속하게 처리하고 효과적으로 관리하기 위한 공간 MMDBMS(Main Memory Database Mangement System)가 필요하다. 이에 본 논문에서는 기존의 PC용 MMDBMS인 HSQLDB를 확장하여 모바일 장치에서 공간 데이타를 효율적으로 관리할 수 있는 공간 MMDBMS를 설계 및 구현하였다. 공간 MMDBMS는 OGC의 공간 데이타 모델을 따르며, 공간 데이타 특성에 적합한 압축 기법인 산술 코딩 기법을 제공하고, 모바일 장치에 적합한 MBR 압축 및 해슁 기법을 이용한 공간 인덱스를 지원한다. 그리고, 모바일 장치의 낮은 성능의 프로세서에서 공간 데이타 디스플레이 기능을 제공하고, 모바일 장치와 디스크 기반 GIS인 ZEUS 사이에서 공간 데이타 import/export의 성능 향상을 위한 데이타 캐쉬 기능을 지원한다.