• Journal of the Korea Convergence Society
• /
• v.2 no.4
• /
• pp.1-7
• /
• 2011

As the developing of the information technology, M2M market that is using communication between devices is growing rapidly and many companies are involved in M2M business. In this paper, the concept of telematics and vulnerabilities of vehicle network security are discussed. The convergence of vehicle and information technology, the development of mobile communication technology have improved quality of service that provided to user but as a result security threats has diverse. We proposed new business model that be occurred to the participation of mobile carriers in telematics business and we analyzed mobile radio communication network security vulnerabilities. We proposed smart phone and Vehicle authentication scheme with M2M device as a way to solve vulnerabilities.

• Proceedings of the Korea Contents Association Conference
• /
• 2009.05a
• /
• pp.677-681
• /
• 2009

The Smoothly Coupled Integration (SCI) proposed in this paper takes only the strength of loosely coupled integration and tightly coupled integration. Furthermore, 3G network and WiBro network, which are coupled with SCI, have independent architecture which supports mobility and seamless services by fast handoff. Computer simulation with the use of OPNET marked excellence in performance of smoothly coupled integration.

• Proceedings of the KAIS Fall Conference
• /
• 2006.11a
• /
• pp.245-249
• /
• 2006

구문분석 말뭉치를 구축하는 작업은 문법 전문가의 많은 시간과 노력을 필요로 하기 때문에, 문법 전문가의 수작업을 감소시켜 줄 수 있는 방법이 연구되고 있다. 기존 방법 중 하나로 구문패턴을 사용하는 방법이 있는데, 이 방법은 두 개의 구문패턴이 완벽하게 일치하는 경우에만 구문패턴을 적용하는 방법이다. 본 논문은 신경망을 사용하여 구문패턴을 학습하고, 다시 구문분석 말뭉치를 구축하는데 학습된 신경망을 적용하는 방법을 사용한다. 소량의 말뭉치에서 실험한 결과, 본 논문에서 사용한 방법이 기존의 방법보다 12%이상의 수작업 감소율을 나타냈다.

• Journal of Korean Academy of Nursing
• /
• v.43 no.3
• /
• pp.331-340
• /
• 2013

Purpose: The purpose of this study was to investigate the effects of the lifestyle modification coaching program on self efficacy, lifestyle and physiologic indexes related to the recurrence of stroke in patients with stroke. Methods: Sixty-one patients with stroke registered with a stroke center participated in this study. Of the participants, 32 were assigned to the experimental group and 29 to the control group. Self efficacy, alcohol drinking, smoking, physical activity, BMI (body mass index), WHR (waist-hip ratio), blood lipid level, and blood pressure were measured both for the baseline, as well as after intervention. The lifestyle modification coaching program consisted of an 8-week telecoaching session following face-to-face education. The control group received only the face-to-face education. Results: There were significant differences in physical activities, WHR, blood pressure within and between groups after intervention. The lifestyle modification coaching program had significant influences on blood pressure even after gender, age, and physical activity had been adjusted. Conclusion: The results of the study indicate that lifestyle modification coaching program is effective for physical activity, abdominal obesity and blood pressure. Therefore it can be used by nurses in hospitals and communities as one of the secondary stroke prevention programs for patients with stroke.

• The Korean Journal of Food And Nutrition
• /
• v.25 no.3
• /
• pp.454-459
• /
• 2012

The objective of this study was to investigate the perception of ginseng and ginseng products among university students living in Yeongsu, Ganwon-do. 196 university students participated in the survey for our study. The ginseng intakes of male students(59.1%) was significantly(p<0.05) higher than the intake of female students(40.9%). The primary reasons for consuming ginseng were to "Maintain my [one's] health" and to, "Restore my [one's] energy". The reasons for not consuming ginseng were "Taste" and, "Physical constitution". Consumers purchased the following ginseng products at the market: For males, ginseng wine(21.7%), ginseng beverage(17.4%), ginseng candy(17.4%) and ginseng kimchi(17.4%) for females, Korean ginseng snacks(23.3%), ginseng yogurt(20.9%), ginseng candy(14.0%), and ginseng jelly(11.6%).

• PNF and Movement
• /
• v.18 no.3
• /
• pp.445-452
• /
• 2020

Purpose: The purpose of this study was to evaluate the analysis of the association between upper extremity function and the Wolf Motor Function Test (WMFT) for chronic hemiparetic stroke patients and investigate the evidence of the WMFT as a clinical tool of upper extremity function in individuals with chronic hemiparetic stroke. Methods: This study applied an observational, cross-sectional design in outpatients at three local rehabilitation units in Seoul. Forty-nine individuals who had a diagnosis of first stroke participated in this study. All participants were analyzed for four clinical measures, including the Box and Block Test (BBT), the WMFT, grip strength, and the Canadian Occupational Performance Measure (COPM). Results: Upon analysis, a significant relationship was found between the WMFT scores and BBT scores as well as the grip strength. The WMFT score was statistically and positively associated with the COPM satisfaction score; however, it was not related to the COPM performance score. Conclusion: The results of this study suggest that the WMFT is positively related to simple tasks, such as hand muscle strength and manual dexterity. However, the WMFT does not have a relationship with complex tasks, which are measured by COPM performance abilities.

• Journal of Digital Convergence
• /
• v.11 no.12
• /
• pp.393-399
• /
• 2013

Recently, the quantity and type of data that is being processed in cloud environment are varied. A method for easy access in different network in a heterogeneous environment of big data stored in the device is required. This paper propose security management method for smoothly access to big data in other network environment conjunction with attribute information between big data and user. The proposed method has a high level of safety even if user-generated random bit signal is modulated. The proposed method is sufficient to deliver any number of bits the user to share information used to secure recognition. Also, the security awareness information bit sequence generated by a third party to avoid unnecessary exposure value by passing a hash chain of the user anonymity is to be guaranteed to receive.

• Journal of Digital Convergence
• /
• v.13 no.12
• /
• pp.203-208
• /
• 2015

Image degradation will occur depending on hardware characteristics according to the lapse of time between beam projectors when multivision system is installed in the Theme park/Exhibition/Science Museum. In this paper, we have researched the 10-bit High-depth and high-resolution $360^{\circ}$ projection image analysis technique to solve the problems of quality and the maintenance of the theater. The goal is to minimize the economic losses and the development of special theater calibration system that can efficiently support a quality of an image. We proposed the method of image analysis technology, and explained the detailed functions and evaluation methods for image analysis technique. Evaluation method included the performance items, and proposed reasonable value to the experimental method and the goal value.

• Journal of Digital Convergence
• /
• v.12 no.7
• /
• pp.279-284
• /
• 2014

Recently, m-health care is be a problem that the patient's information is easily exposed to third parties in case of emergency situation. This paper propose an attribute-based access control protocol to minimize the exposure to patient privacy using patient information in the emergency environment. Proposed protocol, the patient's sensitive information to a third party do not expose sensitive information to the patient's personal health information, including hospital staff and patients on a random number to generate cryptographic keys to sign hash. In addition, patient information from a third party that is in order to prevent the illegal exploitation of the patient and the hospital staff to maintain synchronization between to prevent the leakage of personal health information.

• The Korean Journal of Financial Management
• /
• v.26 no.1
• /
• pp.189-220
• /
• 2009

This study tests the significance of momentum and contrarian strategy which challenge the weak efficient market hypothesis (EMH). If momentum and contrarian strategy can make extra return above the market, this can be a significant critics to the weak EMH. By using Monte Carlo simulation we have found that many existing returature, which test the significance of momentum and contrarian strategy, have a significance distortion problem. We test the significance of momentum and contrarian strategy by using reality check test of White(2000) which solve the problem of data snooping bias. The results are following. When we use the KOSPI index as the benchmark portfolio, we can get the best strategy of momentum strategy in the case of mean return. But in the case of Sharp ratio which is the performance measure adjusting risk, we find that the best strategy in the momentum and contrarian strategy can not dominate the performance of benchmark portfolio. Therefore we argue that weak EMH can not be rejected because of superior performance of momentum and contrarian strategy when we consider risk.