• Information and Communications Magazine
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• v.24 no.11
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• pp.43-50
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• 2007

RFID 기술은 유비쿼터스 사회로 가는 첫걸음으로 인식되면서 많은 연구와 활용방안이 논의되고 있다. 항만 물류의 화물 컨테이너 보호 분야도 그 좋은 예이다. 즉, 화물 컨테이너를 안전하게 잠그고 열며, 화물 정보를 보호하기 위한 전기적 잠금 장치로써 RFID 기술이 활용될 수 있다. 본 고에서는 화물 컨테이너 운송의 안전성을 지원하기 위한 국제 표준화 현황을 살펴보고, 실제 상용화에 박차를 가하고 있는 대표적인 RFID 장치인 전자봉인(eSeal)과 컨테이너 보안장치(CSD)의 기술적 특징에 관하여 논한다. 본 고에서의 주요 관심은 전자 장치로서의 화물 컨테이너 보호용 RFID 태그와 리더 기술이며, 특히 화물 컨테이너의 중요 데이터를 보호하여 컨테이너 운송 시스템의 효율성과 보안성을 동시에 향상시킬 수 있는 데이터 보호 요구사항을 정리하며 결론을 맺는다.

• Proceedings of the KIEE Conference
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• 1996.07b
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• pp.1034-1036
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• 1996

In this paper, an adaptive fuzzy logic controller is presented for auto-tunning of the scaling factors by using learning capability of neural networks. The proposed scheme consists of the FLC which includes the PI-type FLC and PD-type FLC in parallel form and the neural network which learns scale factors of FLC. Computer simulations were performed to illustrate the effectiveness of a proposed scheme. A proposed FLC controller was applied to the second order system and velocity control of the brushless DC motors. For the design of the FLC, tracking error, change of error, and acceleration error are selected as input variables of the FLC and three seal e factors were used in the parallel-type FLC. This scheme can be used to reduce the difficulty in the selection of the scale factors.

• Proceedings of the Korea Inteligent Information System Society Conference
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• 2005.05a
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• pp.113-118
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• 2005

최근 RFID 기술의 급속한 확산은 기존 인식매체의 한계를 극복하고, 기업 및 산업 전반에 새로운 혁신을 가져올 것으로 예상된다, 특히 항만물류산업의 경우 RFID 기술이 적용될 경우 많은 파급효과를 가져올 것으로 예상된다. 우리나라에서는 정부의 각종 시범사업을 통해 RFID 기술을 항만물류산업에 도입하려 하고 있으나 현실적인 개선과제 및 표준화 등에 대한 연구 부족 등으로 많은 어려움을 겪고 있다. 본 연구에서는 기존 문헌 조사와 현업 조사 분석을 통해 단위 업무별 공통 사용 데이터를 도출하여 RFID 국제표준을 준용하는 항만물류산업의 RFID 데이터 표준안을 제시하고자 한다. 향후 본 연구는 현재 진행되고 있는 국가표준안 수립에 적극 활용되어 세계 RFID 시장에서 우리나라의 위상을 높이고 기타 응용분야 국제 표준 규격 제정 시 우리나라의 입지 개선에 큰 역할을 해줄 것으로 기대된다.

• International Journal of Automotive Technology
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• v.6 no.2
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• pp.191-196
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• 2005

A full-bead of multi-layer-steel (MLS) engine head gasket is used to seal the combustion gas. Finite element analyses were conducted to assess the dependence of the sealing performance of full-bead on the forming process consisting of embossing and flatting operations. It is demonstrated that the sealing performance is enhanced with more severe deformation of the bead plate during the embossing, i.e., with the increase in the punching depth, the punch height, the punch width and the friction coefficient of the bead plate against the punch and die, and with the decrease in the width of die cavity. Meanwhile, the flatting process that is employed to adjust the height of the embossed full-bead has no influence on the sealing performance.

• Restorative Dentistry and Endodontics
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• v.46 no.2
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• pp.27.1-27.10
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• 2021

This study describes 6 cases of endodontic overfilling with successful clinical outcomes during long-term (up to 35 years) radiographic follow-up. Successful endodontic treatment depends on proper shaping, disinfection, and obturation of root canals. Filling materials should completely fill the root canal space without exceeding the anatomical apex. Overfilling may occur when the filling material extrudes into the periapical tissues beyond the apex. The present case series describes 6 root canal treatments in which overfilling of root canal sealer and gutta-percha accidentally occurred. Patients' teeth were periodically checked with periapical radiographs in order to evaluate the outcomes during long-term follow-up. All cases showed healing and progressive resorption of the extruded materials in the periapex. The present cases showed that if a 3-dimensional seal was present at the apical level, overfilling did not negatively affect the long-term outcomes of root canal treatment.

• Journal of Korea Society of Industrial Information Systems
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• v.13 no.4
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• pp.64-72
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• 2008

Recently security is being an important issue in almost every field of industry. This situation has affected port logistics industry deeply. Ports are now leaving operational methods that only focus on productivity, and shifting to new ones which focus on safety and customer services on the basis of it. Thus a lot of companies and institutions have offered various solutions as this issue becomes more and more intense. Among them, most typical solutions involve installing special devices to ordinary containers to improve its security, such as CSD (Container Security Device) of GE (General Electric) and eSeal of Savi Networks. On the other hand, these devices focus only on international standards or technical implementation, and this causes inconvenience to actual users like cargo owners, sea carriers, or stevedoring companies. This is considered to be due to lack of sufficient consideration on user demands. This research uses QFD (Quality Function Deployment) method for deducting system requirements in order to solve the problems of previous security devices and to develop a security system that can not only reflect the demands of the users but also considers real-world conditions. According to the QFD results, a total of 21 system CTO's were deducted under 5 categories.

• Journal of Korean Tunnelling and Underground Space Association
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• v.17 no.4
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• pp.473-485
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• 2015

The problems for non-rotating of a disc cutter proceed from the faults in inner parts of the disc cutter such as the leak of hydraulic fluid, the intrusion of tunnel mucks and water, overloading, overheating, poor assembly and substandard material. The rotating of a disc cutter is an indicator to show that the inner parts of disc cutter is operable, although the rotational torque depends on the extent of the damage. Therefore, the key in the problems for non-rotating of disc cutter is to maintain that the tapered roller bearings are working properly. This study aims to investigate the inner parts disassembled from disc cutters applied to the field tests in order to help decision for reuse of the disc cutters. As results, surface finishing to remove the scratch on the load zone of the hubs is needed, with the intent to reuse a hub. And the investigation of lapping surface by optical microscope of floating seals and the contamination test of oil need to be performed for reuse of a disc cutter. Especially, the analysis results show that the floating seals play a key role in the normal operation of bearings. There is nothing significant to report in the rest parts such as bearing, shaft, seal retainers.

• International Commerce and Information Review
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• v.6 no.2
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• pp.43-62
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• 2004

The present study reviewed the meanings of mediation and the roles of mediators, and examined the necessities of online mediation system, prerequisites for the settlement of the system, foreign cases of promoting online mediation and the current state of online mediation in Korea. It also identified problems in the mediation system in Korea and, based on the analysis of problems, discussed directions for the development of Korean mediation system in broad perspective. Directions for the development of Korean online mediation system suggested in this study can be summarized as follows. Firstly, the government must make an unsparing investment in order to activate online mediation system in Korea. Secondly, from the aspect of online mediation procedure, it is necessary to introduce online mediation system in combination with online seal system or certification marks. Thirdly, the judicial circle must take an amicable attitude toward ADR system and, furthermore, it is necessary for the court to be active in introducing various ADR systems. Fourthly, it is necessary to establish an integrated mediation system for the efficiency of mediation and cost saving. Fifthly, mediators must be provided with systematic and exhaustive periodical retraining programs. Lastly, it is necessary to help people to recognize that mediation system is a better service than other forms of dispute resolution procedure and particularly to enhance users' confidence in online mediation through advertising its advantages and safety. Moreover, in order to make e-commerce-related online dispute resolution available to everybody, it is necessary to overcome language barriers by establishing perfect service systems including automatic translation system in the governmental dimension.

• Journal of the Korean housing association
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• v.16 no.4
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• pp.81-89
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• 2005

The purpose of this thesis is thermal performance simulation about various type that can apply in the high-rise residential building to estimate condensation performance of window that is consisted of frame and glazing in curtain wall. The result of this thesis are summarized as follows. First, condensation occurrence point when relative humidity is $30{\cdot}40{\cdot}50\%$ is shortest Low-e double glass. Difference by type of gas and spacer was a little by $2{\~}6$ cm, among it, the case that apply krypton in gas and the case that apply double seal in spacer were less condensation occurrence distribution. Second, when analyzed improved proposal of window and existing plan through simulation, improved proposal is superior from general side of the interior and exterior temperature, thermal break surrounding temperature and temperature of frame end, condensation occurrence point etc. Therefore, if it was used improved proposal with effect that improve in curtain wall of high-rise residential building, it may improve window condensation performance of curtain wall.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.10
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• pp.2203-2208
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• 2011

In this paper, we describe application service development for secure land and marine transport based on CSD (Conveyance Security Device) systems. Based on CSD systems, we present application service and security service according to relevant standards as well as test procedure of developed services. Exploiting temperature, moisture, impact sensors, state monitoring function of container freight was developed to prevent disaster during transportation in addition to security function with CSD. For confidentiality of messages exchanged among application service entity and CSD systems, Encryption and decryption functions going by RC5 and AES-128 algorithms were implemented at desktop PC and 8 bit CPU environments, respectively. Measuring the elapsed time during encryption and decryption shows that two algorithms are allowable for the application service.