• 한국항행학회논문지
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• 제15권5호
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• pp.865-870
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• 2011

64-비트 블록 암호 MD-64는 WSN과 같은 환경에서 효율적으로 구현이 가능하도록 설계된 블록 암호이다. 본 논문에서는 MD-64의 전체 라운드에 대한 확장된 연관키 부메랑 공격을 제안한다. 본 논문에서 소개하는 공격은 MD-64에 대한 첫 번째 공격이며, $2^{45.5}$개의 연관키 선택 평문을 이용하여 $2^{95}$의 MD-64 암호화 연산을 수행하여 MD-64의 비밀키를 복구한다.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2009년도 춘계학술대회
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• pp.445-449
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• 2009

Nowadays ubiquitous sensor network (USN) has been considered as a key technique in all kinds of industrial area. The main purpose of this study is to search and analyze systems in real industrial fields based on USN. USN technique has been applied into various industrial fields such as ground/underground management system, visitor counter system, monitoring system, unmanned vehicles system and so on. The result of this study will be fruitful not only for researches but also for practices in industrial fields related to USN.

• BMB Reports
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• 제45권12호
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• pp.700-706
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• 2012

Obesity is a worldwide epidemic as well as being a major risk factor for diabetes, cardiovascular diseases and several types of cancers. Obesity is mainly due to the overgrowth of adipose tissue arising from an imbalance between energy intake and energy expenditure. Adipose tissue, primarily composed of adipocytes, plays a key role in maintaining whole body energy homeostasis. In view of the treatment of obesity and obesity-related diseases, it is critical to understand the detailed signal transduction mechanisms of adipogenic differentiation. Adipogenic differentiation is tightly regulated by many key signal cascades, including insulin signaling. These signal cascades generally transfer or amplify the signal by using serial tyrosine phosphorylations. Thus, protein tyrosine kinases and protein tyrosine phosphatases are closely related to adipogenic differentiation. Compared to protein tyrosine kinases, protein tyrosine phosphatases have received little attention in adipogenic differentiation. This review aims to highlight the involvement of protein tyrosine phosphatases in adipogenic differentiation and the possibility of protein tyrosine phosphatases as drugs to target obesity.

• Journal of Plant Biotechnology
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• 제42권1호
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• pp.1-5
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• 2015

The biological roles of glycogen synthase kinase 3 (GSK3) proteins have long been extensively explored in eukaryotic organisms including fungi, animals and plants. This gene family has evolutionary well conserved kinase domain and shares similar phosphorylation properties to their substrate proteins. However, their specific biological roles are surprisingly distinct in different organisms. GSK3s play key role in key regulating the cytoskeleton and metabolic processes in animal systems, but plant GSKs are involved in quite different processes, such as flower development, brassinosteroid signaling, abiotic stresses, and organogenesis. In particular, recent studies have reported the critical multiple functions of BIN2 and its related paralogues plant GSK3s during organogenesis via connecting hormonal or developmental programs. In this review, we outline the recent understanding in the versatile functions related in physiological and biochemical relevance, which are mediated by plant GSK3s in various cellular signaling.

• 보건행정학회지
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• 제28권3호
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• pp.257-262
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• 2018

This study reviews the advent of long-term care (LTC) hospitals and its key issues in Korea. For analysis, enforcement ordinances and enforcement rules related to LTC hospitals were reviewed. Official statistic data were used for quantitative analysis and Organization for Economic Cooperation and Development data were utilized for comparative analysis. Various references and expert interviews were conducted for status analysis. As of 2016, the number of LTC hospitals was 1,386 and the number of beds were 246,373. It showed the trend of increasing medical care costs and the cost of care at LTC hospitals increasing from 998.8 billion Korean won in 2008 to 4,745.6 billion Korean won in 2016, accounting for 7.3% of the total National Health Insurance expenditure. From the societal perspective, several issues were pointed out within the current health care system related to LTC hospitals: establishment of roles, concerns about the increase in medical expenses, and the quality of medical personnel.

• 한국시스템다이내믹스연구
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• 제13권2호
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• pp.73-91
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• 2012

This study aims to comprehensively understand the dynamics between the factors related to service quality, satisfaction and reuse intention. The contents of the study are as follows. First, it draws the limitations of the existing studies by reviewing the literature related to the relationships between service quality, satisfaction and reuse intention. Second, it highlights the characteristics of System Dynamics as a means of overcoming their shortcomings as well as examining the dynamic mechanism of the relevant factors. Third, it explores the feedback loops of the relevant key variables and the feedback structure of the system. Lastly, it concludes with the suggestions and implications of the key research findings. This study is expected to emphasize the importance of the feedback mechanism operating around the service quality, satisfaction, and reuse intention. Further, the causal loop diagram developed can be a basic material for the diverse levels of governments as well as service providers to refer to for improving the service quality of Community Social Service Investment Program.

• Journal of Veterinary Science
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• 제21권2호
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• pp.30.1-30.11
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• 2020

Mycoplasma ovipneumoniae (Mo) is difficult to culture, resulting in many difficulties in related research and application. Since nucleotide metabolism is a basic metabolism affects growth, this study conducted a "point-to-point" comparison of the corresponding growth phases between the Mo NM151 strain and the Mycoplasma mycoides subsp. capri (Mmc) PG3 strain. The results showed that the largest difference in nucleotide metabolism was found in the stationary phase. Nucleotide synthesis in PG3 was mostly de novo, while nucleotide synthesis in NM151 was primarily based on salvage synthesis. Compared with PG3, the missing reactions of NM151 referred to the synthesis of deoxythymine monophosphate. We proposed and validated a culture medium with added serine to fill this gap and prolong the stationary phase of NM151. This solved the problem of the fast death of Mo, which is significant for related research and application.

• Journal of Information Processing Systems
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• 제3권2호
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• pp.54-63
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• 2007

The high-speed mobile Internet has recently been expanded, many attractive services are provided. However, these services require some form of security-related technology. This paper outlines Japanese mobile services and exposits some mobile security topics including mobile spam, mobile malware, mobile DRM system, mobile WiMAX security, and mobile key management.

• World Technopolis Review
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• 제2권1호
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• pp.10-20
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• 2013

This paper reviews key elements of a Science or Technology Park in the context of open innovation. Insights into and recommendations on key issues related to intellectual property, licensing and venture capital that would be of interest to any Science Park are presented later.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 춘계학술대회 특별세미나. 특별세션
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• pp.34-45
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• 2006

Making practical use of urban MAGLEV system which is tried by government includes technique development and railway construction. Because huge amount of money will be spent on this project, feasibility study is being carried out in order to check the feasibility and to devise the master plan in prior to making practical use of urban MAGLEV system. The key issues of feasibility study are possibility of technique development, economical feasibility, location of a model railway and the improvement of related laws and regulations. This paper shows the approach to solve these key issues.