• IEIE Transactions on Smart Processing and Computing
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• 제2권5호
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• pp.297-301
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• 2013

Key agreement protocols allow multi-parties exchanging public information to create a common secret key that is known only to those entities over an insecure network. Since Joux first published the pairing-based one round tripartite key agreement protocol, many authenticated protocols have been proposed. Unfortunately, many of them have been broken while others have been shown to be deficient in some desirable security attributes. In 2004, Cheng et al. presented two protocols aimed at strengthening Shim's certificate-based and Zhang et al.'s tripartite identity-based protocols. This paper reports that 1) In Cheng et al.'s identity-based protocol, an adversary can extract long-term private keys of all the parties involved; and 2) Cheng et al.'s certification-based protocol is weak against key integrity attacks. This paper suggests possible remedies for the security flaws in both protocols and then presents a modified Cheng et al.'s identity-based, one-round tripartite protocol that is more secure than the original protocol.

• 한국컴퓨터정보학회논문지
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• 제22권9호
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• pp.1-8
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• 2017

In this paper, we propose a file system for flash memory which remedies shortcomings of existing flash memory file systems. Besides supporting large block size, the proposed file system reduces time in initializing file system significantly by adopting logical address comprised of erase block number and bitmap for pages in the block to find a page. The file system is suitable for embedded systems with limited main memory since it has small in-memory data structures. It also provides efficient management of obsolete blocks and free blocks, which contribute to the reduction of file update time. Finally the proposed file system can easily configure the maximum file size and file system size limits, which results in portability to emerging larger flash memories. By conducting performance evaluation studies, we show that the proposed file system can contribute to the performance improvement of embedded systems.

• 한국중재학회지:중재연구
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• 제27권4호
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• pp.61-72
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• 2017

In this study, the Commission proposed the mitigation of remedies by improving the role of medical disputes and preventing medical disputes. Medical disputes include a comprehensive description of medical malpractice, medical negligence, medical malpractice, and medical malpractice. Medical negligence refers to the neglect of medical care due to careless medical care in the treatment of patients, leading to patient injury and death. An inappropriate response in the process of international treatment could result in international trials and a decline in international credibility. In cases where medical disputes arise, health care is strictly necessary to determine the truth or absence of medical malpractice, and these expertise and experience are usually provided by emotion. With the neutral and objective emotions provided fairly and impartially, medical care expertise and experience can be fair, and the medical disputes can be resolved peacefully if the parties are trustworthy. The Health Care Dispute Mediation Committee should focus on enhancing the professionalism, objectivity, and reliability of medical care.

• Journal of Information Technology Applications and Management
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• 제11권2호
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• pp.15-27
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• 2004

Most software projects inevitably involve various types and degrees of uncertainty. Without proper risk assessment and coordination, software projects can easily run out of control and consume significant additional resource. Thus, risk management techniques are critical issues to information system researchers. Previous empirical studies of U.S. software firms support the adoption of development standardization and user requirement analysis techniques in risk-based software project management. Using data collected from software projects developed in Korea during 1999-2000, we conduct a comparative study to determine how risk management strategies impact software product and process performance in countries with dissimilar IT capabilities. In addition, we offer an alternative conceptualization of residual performance risk. We show that the use of residual performance risk as an intervening variable is inappropriate in IT developing countries like Korea where the role of late stage risk control remedies are critical. A revised model is proposed that generates more reliable empirical implications for Korean software projects.

• Journal of Information Technology Applications and Management
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• 제11권2호
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• pp.215-226
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• 2004

As with the fast spread of internet uses in recent years, electronic commerce has evolved. The proliferation of electronic commerce has increased diverse forms of fraud cases since internet helps intended criminals remain anonymous. In absence of effective tools to warrant the reliability of parties offering products or services through electronic commerce, consumers have to absorb damages unfairly. Internet escrow service has been considered to be an option to establish reliability between buyers and sellers and to protect consumers from possible fraud cases. However, like other industries, fraudulent escrow services have appeared in internet. This study has been intended to analyze fraudulent internet escrow services and to propose an effective regulatory system of internet escrow services. To do that, this study benchmarked the regulation of the State of California, primarily focusing on the formation of escrow company, regulation of escrow business, and remedies for wrongdoing, so Korea can consider the adoption of similar systems.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2009년 추계학술대회논문집
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• pp.170-176
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• 2009

Flow control butterfly valve(FCBV) is known to have difficulty in controlling flow rate along valve opening due to its high flow rate. In low opening condition, the butterfly valve also has some shortcomings such as noise, vibration and erosion which are mostly caused by cavitation effects. Therefore, the FCBV requires proper remedies to reduce cavitation effects and to improve flow control performance. Numerical analysis is applied to FCBV flow to find effects of design factors such as seat diameter and valve opening rate. Cases with 3 different sizes of seat diameter and various valve opening rate are selected for the numerical analysis. From the analysis results, it is found that the FCBV with small seat diameter shows better pressure loss performance and reduced cavitation effects.

• 전력전자학회:학술대회논문집
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• 전력전자학회 1997년도 전력전자학술대회 논문집
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• pp.386-392
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• 1997

Recently, according to developing industry and life style, power consumption have been increased year after year. Currently these much power demand from power consumer is weakening the allowable power reserve margin in summer. As one of the remedies about this problem, the small scale utility interactive photovoltaic system(UIPVS) is considered for auxiliary power source. For this system one of problems to be solved technically, system operating power factor. Generally in case of small scale system, system is operated in unity power factor. But this unity power factor operating mode decrease power factor viewed from utility because UIPVS supply active power to utility. Therefore this paper propose UIPVS with power factor correcting function and this system is analyzed.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2001년도 Proceedings ICPE 01 2001 International Conference on Power Electronics
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• pp.822-828
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• 2001

Three-phase four-wire electrical distribution systems are widely employed in manufacturing plants, commercial and residential buildings. Due to the nonlinear loads connected to the distribution system, the neutral conductor carries excessive harmonic currents even under balanced loading since the triplen harmonics in phase currents do not cancel each other. This may result in wiring failure of the neutral conductor and overloading of the distribution transformer. In response to these concerns, a cost-effective neutral current harmonic suppressor system has been proposed [6]. This paper proposes an improved control method for the harmonic suppressor system under unbalanced load conditions. The proposed control method compensates for only the harmonic components in the neutral conductor, and the zero-sequence fundamental component due to unbalanced loading is prevented from flowing through the harmonic suppressor system. This remedies overloading and power loss of the system. The experimental results on a prototype validate the proposed control approach.

• 한국식품영양과학회:학술대회논문집
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• 한국식품영양과학회 2004년도 Annual Meeting and International Symposium
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• pp.103-109
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• 2004

The obese population has been increasing over the world wide and obesity became a socioeconomic problems. It is become more serious by the accumulation of the knowledge that the obesity is related directly or indirectly with several diseases like, diabetes, hypertension, etc. With these reasons, many functional food or agents for the purpose of weight loss have been developed. However, most of these remedies are unproven and some have produced even dangerous side effects due to the ephedrine alkaloids contained in Ma-Hang. Because of these reasons, they banned using of these agents in US and regards the antiobesity functional agents as drugs in Europe. Several functional agents are known for weight loss activities like, HCA, L-canitine, CLA, chitosan, calcium supplements and capsaicin containing red pepper, kimchi and kochujang. We describe here about the function, efficacy and mechanism of these antiobesity functional agents. Furthermore, the trial of the mixture of weight loss related herbal ingredients for safe multifunctional antiobesity functional agents are discussed here, as well.

• 한국조리학회지
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• 제6권3호
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• pp.343-355
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• 2000

Caffeine is widely consumed ingredient and it belongs to alkaloids. Many foods that we intake contain caffeine ; coffee, tea cocoa, chocolate, and coke. And it is also added to many commercial remedies ; cold tablets, headache tablets, etc. Effect of caffeine that is known to us so far is as follows; 1. Remaining awake for long hours 2. Increasing concentration and decreasing fatigue 3. Increasing basal metabolic rate 4. decomposing glycogen and body fat and providing energy 5. Stimulating gastric acid 6. Increasing urinary excretion. Caffeine containing beverages(especially, coffee)are also favorite food in adult. In case of children and youth, chocolate and coke are favorite food. So, to intake caffeine containing foods moderately can be a vitality of life. But, a long-term intake or overdose of caffeine can result in many side effects. For example, headache, irritability, restlessness, hypertension, fetal abnormality, etc. Therefore, it is desirable that caffeine intake is under 300-400mg per day. To decrease intake of caffeine, 1. Use decaffeinated coffee 2. Product of decaffeinated coffee bean through gene transformation 3. Indicate content and function of caffeine on caffeine-food container 4. Provide an information of caffeine to public.