• The Journal of the Korea institute of electronic communication sciences
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• v.11 no.6
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• pp.611-618
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• 2016

The suggested paper studies communications network and system technology, designing data to sync to both USB memories and cloud storages at the same time, which would allow users to safely keep and manage data even in case of network troubles, affecting cloud storages, and/or loss of physical USB memories, resulting in lost data in the physical memory. The need of secure data management policy for cloud storage users form the basis of this study, offering solutions to network failures and loss of physical storage by creating hybrid cloud system. To provide convenience to windows users, the UI design should integrate that of windows explorer to maximize security and convenience.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.26 no.2
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• pp.8-30
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• 2018

The purpose of this study was to investigate the relationship between empowering leadership, directive leadership, safety communication, and safety behavior. Also, we examined whether safety motivation had a moderated mediating effect on this relationship. We collected the surveys from 343 combat pilots of the Republic of Korea Air Force for the analysis. Our structural equation modeling analysis revealed that there was a positive relationship between empowering leadership and safety behavior, and safety communication fully mediated the relationship. However, there is no relationship between directive leadership and safety behavior. Also, our results showed that safety motivation moderated the relationship between empowering leadership and safety communication, but not the relationship between directive leadership and safety communication. Furthermore, the relationship between empowering leadership and safety behavior through safety communication varied significantly with the degree of safety motivation, such that the higher the safety motivation, the higher the impact of empowering leadership on safety behavior through safety communication. Finally, we discussed the implications of these results, study limitations, and practical suggestions for future research.

• Journal of the Korean Applied Science and Technology
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• v.40 no.4
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• pp.773-785
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• 2023

This study is a descriptive research conducted to identify the factors influencing patient safety management activities of geriatric hospitals nurses and use basic data to prevent patient safety accidents. Subjects were 220 nurses and data were collected by questionnaires from february 1 to 28, 2023. Data were analyzed using t-test, ANOVA, Scheffe's test, Pearson correlation coefficients and Multiple regression analysis using the SPSS 29.0 program. Patient safety motivation was positive correlated with degree of patient safety(r=.41, p<.001), and degree of patient safety was positive correlated with patient safety nursing activity(r=.18, p<.01). Degree of patient safety(𝛽=.21, p<.001) and patient safety guidelines(𝛽=.16, p<.001) were main factors that affect patient safety nursing activity, and its explanatory power was 7.5%(Adj R²=.075, p<.001). For patient safety nursing activity, it is proposed to develop and apply a education program that strengthens practical training for effective coping after safety accidents along with risk prediction training to prevent before safety accidents.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2001.11a
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• pp.20-25
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• 2001

블록 암호 알고리즘과 블록 암호의 운영모드 및 메시지 인증 알고리즘에 대한 의사 난수성의 증명은 근래의 암호 분석에서 구조적인 안전성을 증명을 위한 기법으로 커다란 안전성의 평가 방법으로 자리 매김하고 있다. 본 논문에서는 비동기식(W-CDMA) 3세대 이동통신 3GPP에서의 MAC 알고리즘의 안전성을 의사 난수성에 기반한 concrete security 관점에서의 안전성에 대해 알아본다. 즉, 3GPP-MAC 알고리즘의 구조적인 안전성에 대한 증명을 다룬다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.1
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• pp.1038-1041
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• 2005

In today's SoC design, most of IPs which use the different clock frequency from that of the bus require asynchronous FIFOs. However, in many cases, asynchronous FIFO is designed improperly and the cost of the wrong design is high. In this paper, a register-based asynchronous FIFO is designed to transfer data in asynchronous clock domains by using a valid bits scheme that eliminates the problem of the metastability and synchronization altogether. This FIFO architecture is described in HDL and synthesized to the gate level to compare with other FIFO scheme.

• The Journal of the Korea institute of electronic communication sciences
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• v.11 no.12
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• pp.1209-1218
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• 2016

In order to safely and speedily transport a load such as a large glass plate using four electric cylinders, the synchronous error outside the permitted range should not be continuously generated between the cylinders. In this study, a methodology of synchronous control which can be applied to synchronization of four or more cylinders is developed. The synchronous control system based on the decoupling structure is composed of a reference model, position and synchronous controllers in the respective cylinders. The reference model is used for calculating the decoupled synchronous error and control input for the each cylinder. The position controller of I-PD type is designed in order that the cylinder may follow the reference signal without overshoot and input saturation. And the synchronous controller of lead compensator is designed to achieve stable and accurate synchronization through loop shaping approach. Finally, the simulation results show that the synchronization between the four cylinders can be quickly and stably while each cylinder rod is transferred to the target point under torque disturbance.

• The KIPS Transactions:PartC
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• v.14C no.2
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• pp.129-138
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• 2007

AAA(Aluthentieation, Authorization, Accounting) protocol is an information securitv technology that offer secure and reliable user Authentication, Authorization, Accounting function systematically in various services. protocol and wireless network work as well as win network. Currently IETF(Internet Engineering Task Force) AAA Working Group deal with about AAA protocol and studying with activity, But, recently it exposing much problems side to user's anonymity and privacv violation. Therefore, in this paper, AAAH(Home Authentication Server) authenticaters Mobile device, after that, use ticket that is issued from AAAH even if move to outside network and can be serviced offering authentication in outside network without approaching by AAAH, Also, we study mechanism that can offer user's privacy and anonymousness to when use service. Our mechanism is using Time Synchronization OTP and focusing authentication and authorization. Therefore, our mechanism is secure from third party attack and offer secure and effective authentication scheme. Also only right user can offer services by using ticket. can reduce signal and reduce delay of message exchanged, can offer persistent service and beighten security and efficiency.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.21 no.7
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• pp.1379-1385
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• 2017

Virtual training is a kind of training that proceeds as if it were a real situation. In recent years, there has been a growing demand for experiencing a situation in which a virtual reality technology has not been experienced directly in the real world due to the rapid development of the technology. Especially, safety education is very necessary in Korea where safety accidents are caused by many disasters. Therefore, simulation of disaster response training using virtual reality is more urgent than ever. Although the automatic defibrillator is the medical device that is most needed to rescue patients with cardiac arrest, few people know how to use it. Therefore, there are very few cases where the use of automatic defibrillators has saved the patient's life in Korea. The proposed Automated External Defibrillator virtual training system enables immersive and experiential training in real situations and effective training at low cost.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.18 no.2
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• pp.218-230
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• 1993

A power line modem(PLM) which transfers data safely through power lines in houses or small offices is considered. When a power line is used for communications, transmitted signals could be affected by the channel characteristics such as frequency-selective fading, interference, and time-varying attenuation. In order to overcome these impairments, a direct sequence(DS) technique which is well known as an effective instrument against a variety of interferences and hostile channel properties is employed. Using a DS technique, however, requires more circuits such as PN code generator circuits, code modification circuits, and complicated synchronization circuits, and it also results in substantial acquisition delay. In this paper, some of these circuits are implemented via software programmed in the system controller, and the complicated synchronization circuits are replaced by simple circuits utilizing a 60 Hz power signal for synchronization. The synchronization ciruits used in this paper virtually eliminate the substantial acquisition delay, and is also designed to free influence of 60 Hz zero crossing jitters which reside in a power signal. As a result, a PLM using a DS technique is realized in the form of wall-socket plug, and the PLM hardware would be very much simplified.

• Proceedings of the IEEK Conference
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• 2003.07c
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• pp.2761-2764
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• 2003

본 논문에서는 개발된 biphasic 자동형 제세동기 시스템의 임상적 효용성을 동물실험을 통하여 검증하였다. 개발된 제세동기 시스템은 기존의 monophasic 제세동기와는 달리 낮은 에너지로 세동을 제거하는 biphasic 형으로, 이미 실험실 환경의 테스트를 통해 시스템의 안정성과 알고리즘의 탁월한 검출 능력이 확인되었다. 시스템의 임상적 안전성 및 효용성을 확인하기 위하여 8마리의 돼지를 사용하여 시스템의 적절한 세동 검출 및 세동제거능력을 실험하였고, 그 후 시스템의 효용성을 향상시키기 위한 연구로 같은 양의 에너지를 다른 전압 레벨에서 방전시켜 이에 따른 제 세동 효율을 조사하고, 또한 세동 신호의 규칙성과 방전시점에 따른 제 세동 효과를 평가하였다.