• Journal of Life Science
• /
• v.33 no.2
• /
• pp.208-215
• /
• 2023

In recent decades, the field of aging research has progressed from the genetic and cellular levels to in vivo models of blood exchange. Since genes capable of extending the lifespan in C. elegance have been reported, various potential target molecules have been discovered through genomics, proteomics, metabolomics, and transcriptomics. Accordingly, research on the interactions between target molecules has also been increasing. The parabiosis method, in which two experimental animals are surgically combined, was introduced, and a factor that could reverse the aging phenomenon was discovered using this method. The parabiosis method is used to find more accurate and effective aging-reversal factors that could exist in young blood. As more new evidence has been revealed, the parabiosis method has established a new paradigm for aging research. Moreover, a device capable of exchanging blood elaborately in laboratory animals was published in 2022 and presented new results necessary for aging reversal. Since GDF11, was reported, many other anti-aging candidates that are soluble factors in blood, such as β2m, TIMP2, VCAM1, Gpld1, and clusterin, have been discovered. In addition, mcicroglia cells and neuroinflammation have been directly proven to be aging factors. These latest research results were obtained by parabiosis, the newly designed device for plasmapheresis, and injecting young blood or conditioned blood methods. In this review, we discuss the latest research results using the device and young blood administration in old mice.

• Korean Journal of Culture and Social Issue
• /
• v.15 no.3
• /
• pp.431-446
• /
• 2009

This study was intended to validate and develop the driving stress coping behavior scale. In a preliminary investigation, literature studies on the driving stress and open questionnaire were administered and examined in four regions in Korea. As a result, 64 items driving stress questionnaire were developed. In the study, this Driving Stress Coping Behavior Scale(DS-CBS) was examined to 372 drivers located seven regions in Korea. The factors analysis revealed 2 meaningful factors[(Good Coping: GC), (Bad Coping: BC) with 24 items. When internal consistency for each 2 factor was calculated, all sub-scale revealed a satisfactory level of Cronbach's α. Also, correlations with Driver Coping Questionnaire(DCQ) and risk driving behaviors(speed driving, drunken driving, traffic violation, offence accident, defence accident) supported consistently validity of the Driving Stress Coping Behavior Scale(DS-CBS). Also, We investigated the influences of 'Good Coping', 'Bad Coping' consisting of driving stress coping behavior, on traffic accidents risk. As a result, 'Good Coping' and 'Bad Coping' influenced traffic accidents risk. 'Good Coping' had decreased effects, the other side 'Bad Coping' had increased effects on traffic accidents risk(TARI).

• 전기의세계
• /
• v.16 no.5
• /
• pp.51-62
• /
• 1967

Relay Protector의 자체특성시험을 한 다음 대전-이리, 대구-상주, 대구-진영 간의 154KV 송전선과 이를 인접역행하는 통신선에 Relay Protector를 취부하고 이 구간의 154KV 송전선을 직접접지한 후에 실제로 인공고장을 이르켜 Relay Protector의 성능실험을 하였다.

• 대한핵의학회:학술대회논문집
• /
• 1990.04a
• /
• pp.196.1-196.1
• /
• 1990

• Proceedings of the Korean Society of Radiological Science
• /
• 2001.09a
• /
• pp.79.1-79.1
• /
• 2001

• Defense and Technology
• /
• no.7 s.209
• /
• pp.12-17
• /
• 1996

중국은 탈냉전 시기에 효과적인 국가안보를 위한 군사상 비장의 카드로 값싸고, 손쉬운 핵병기의 현대화를 추진하고 있다. 중국은 이러한 핵전력의 강화를 통한 지역 대국으로서의 국가적 위신을 보존하고자 하려는 것 같다. 또한 중국이 국제여론에 역행하는 핵실험을 강행하는 것은 중국이 핵실험 이슈를 대외관계에 있어서 하나의 정치적 카드로 사용하고자 하는 의도와 관련 있어 보인다

• The Korean Journal of Applied Statistics
• /
• v.5 no.1
• /
• pp.1-8
• /
• 1992

Using the partitioned matrices, we presents a method of analysis which are not needed inverse matrix for Hierarchical Group Divisible(HGD) designs whose treatments are composed of 2.2.2.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.26 no.7A
• /
• pp.1250-1256
• /
• 2001

개선된 리버스 자켓 행렬(Reverse Jacket matrix)의 정의와 함께 그의 역행렬을 소개한다. 새로이 정의된 리버스 자켓 행렬은 실베스터 타입의 하다마드 행렬을 이용하여 더욱 일반화되었다. 이 논문에서는 고속 리버스 자켓 변환(fast Reverse Jacket transform)을 제시하며 또한 이 알고리즘이 4점 이산 푸리에 변환으로 응용이 됨을 보여준다.

• Journal of the Korean Institute of Telematics and Electronics
• /
• v.23 no.4
• /
• pp.455-459
• /
• 1986

A large set of linear equations which arise in many applications, such as in digital signal processing, image filtering, estimation theory, numerical analysis, etc. involve the problem of a tridiagonal matrix. In this paper, the determinant, eigenvalue and inverse matrix of a tridiagoanl matrix are analytically evaluated.

• Journal of Industrial Technology
• /
• v.9
• /
• pp.127-131
• /
• 1989

순허수 고유치를 포함하고 있는 행렬이 행렬부호함수 알고리즘에서 보이는 성질을 규명했다. 역행렬이 존재하는 행렬도 이 알고리즘에서는 행렬의 조건과 무관하게 특이행렬이 될 수 있음을 보였다. 이 특성을 이용해서 이론적으로 모든 고유치를 알아낼 수 있다.