• ETRI Journal
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• 제33권3호
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• pp.434-442
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• 2011

This paper presents a practical differential fault analysis method for the faulty Advanced Encryption Standard (AES) with a reduced round by means of a semi-invasive fault injection. To verify our proposal, we implement the AES software on the ATmega128 microcontroller as recommended in the standard document FIPS 197. We reduce the number of rounds using a laser beam injection in the experiment. To deduce the initial round key, we perform an exhaustive search for possible key bytes associated with faulty ciphertexts. Based on the simulation result, our proposal extracts the AES 128-bit secret key in less than 10 hours with 10 pairs of plaintext and faulty ciphertext.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2023년도 춘계학술대회
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• pp.26-26
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• 2023

• 한국주거학회논문집
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• 제13권6호
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• pp.79-88
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• 2002

The intent of this study is to investigate the feasibility of small-scale developments in residential blocks in the city, and to propose development strategies and models. This research is done on the premises that large housing developments ignore the urban structure of its own quality, whitens on-lot-based multi-unit housing developments fail to maintain amenity and livability in residential blocks. For solving these shortcomings, this research proposes the possibility of small-scale housing development models as an alternative development system. And some residential blocks were selected as case sites and analyzed into typical block types, to support the proposal of pertinent development types. Each type was investigated and discussed in terms of development feasibility and proper development strategies. Finally, three development schemes are proposed as prototypical models for the best application in residential blocks.

• 패션비즈니스
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• 제10권3호
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• pp.129-142
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• 2006

This research chose 135 environmental cleaners in Busan Metropolitan City as subjects. First, the reality of wearing their safety jackets was investigated. Next, visual evaluation of the reflexive function of the current safety jackets was made. Then, based on the above results and the subsequent improvement proposal, the final product, the research costume, was made. 1. Based on the investigation of the wearing reality of safety jackets and the visual evaluation results of the reflexive function, an improvement proposal was made. As cleaners are usually seen sidewise on the roads and lateral luminosity is rather low, this aspect was compensated on the part of a jacket. Also, the reflexive belt used the diagram of ${\Delta}$ to improve visual effects. 2. As the lower body held the accident frequency of 45.0%, the sides of pants had the reflexive belt to increase visibility. 3. In consideration of the mutual effects between the background cloth and general reflexive width, the same width (5cm) of the reflexive belt as that of Type A was adopted.

• 한국국방경영분석학회지
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• 제28권2호
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• pp.95-115
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• 2002

Configuration management is a process that establishes and maintains consistency of a product with its requirements and configuration information throughout its life cycle. This paper deals with the improvement of configuration management for weapon system. We analyze configuration management system, organization, human resource, regulations, and automated system of USA. Then we apply the ideas to our proposal for the improvement of configuration management. The proposal for the improvement of configuration management consists of three parts. The first one is the improvement of configuration management for weapon system by R&D, the second one is the improvement of configuration management for weapon system by foreign acquisition, and the last one is the improvement of configuration management in the aspects of organization, human resource, regulations, and automated system. This paper will be contributed to the activation of configuration management system and the efficiency of acquisition project management.

• 한국안전학회지
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• 제34권1호
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• pp.98-107
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• 2019

In the case of a disaster, the damage caused by the disability vulnerability of persons with disabilities is significantly increased, discussing about a problem for the protection of the vulnerable class. However, until now policy, technology and response guidelines for disaster and safety have been focused on the general public. Therefore, it is necessary to develop customized support technology for disaster and safety considering vulnerable characteristics of vulnerable class. Firstly, it is necessary to prepare draft improvement proposal of act and support system related disaster and safety for persons with disabilities and older persons. So, this study was carried out analysis of act, policy and support system on disaster and safety for persons with disabilities and older persons of domestic and overseas in order to draw implication. Furthermore, we established direction for improvement of act and policy on disaster and safety for persons with disabilities based on the analysis, and suggested draft improvement proposal.

• 공학기술논문지
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• 제11권4호
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• pp.287-294
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• 2018

Since its introduction in Korea, design VE has widely been used as a means to enhance values in the construction industry. However, a greater emphasis is still placed on cost reduction in approach attitudes and performance evaluations on the implementation of design VE. In this regard, this study presented a performance evaluation method for cost, function, and value of VE proposals. Numerical criteria on the increase and decrease of cost and function that can classify the value enhancement type of VE proposals were proposed based on the performance evaluation method. It is expected that the use of numerical criteria for the type classification of VE proposal, and cost and performance evaluation method proposed in this study will make it possible to conduct a clear and more intuitive evaluation of VE proposal. However, it is appropriate to use the numerical criteria as a guideline to apply the new performance evaluation method for VE proposals. Therefore, it is necessary to conduct a statistical analysis with a wider range of users after the repeated application of the findings of this study, and thus to carry out research for presenting the numerical criteria for various types of users.

• 간호행정학회지
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• 제19권5호
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• pp.565-577
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• 2013

Purpose: This study was done to propose an improvement in the Nursing Fee Differentiation Policy to alleviate polarization of nursing staffing level among hospitals and to rectify the confusion of legally mandated standards between the Korean Medical Law and National Health Insurance Act. Methods: The policy regulation was reconstructed related to nurse staffing standards and nurse-to-patients ratios. Data on nurse staffing grades were obtained from database of the Health Insurance Review & Assessment Service (HIRA) for the third quarter of 2010 for 44 tertiary hospitals, 274 general hospitals, and 1,262 hospitals. A break-even analysis was used to estimate financial burden of the revised policy improvement proposal. An industrial engineering method was used to calculate Nurse-to-Patients ratios per shift. Results: Twelve tertiary hospitals were downgraded. 74 general hospitals and 102 hospitals were upgraded after application of the regulation. Finances for total hospitalization expenditures changed from -3.55% to +3.14%. Conclusion: The results indicate that the proposed policy would decrease polarization between tertiary hospitals and small hospitals, and would not put a major strain on the finances of the Korean National Health Insurance. Therefore, it is suggested that government stake-holders and many interest groups consider this policy proposal and build a consensus.

• 한국초전도학회:학술대회논문집
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• 한국초전도학회 2004년도 High Temperature Superconductivity Vol.XIV
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• pp.30-30
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• 2004

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 2001년도 추계학술발표회요약집
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• pp.121-121
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• 2001