• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.16 no.1
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• pp.89-95
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• 2016

In this paper, we propose a locker system that can remotely control and manage locker. The main features of the proposed system are follows. First, connect the locker with server and then open the locker after passing through the certification process in server. Second, locker manager can more systematically manage a locker by using locker management system based on smart phone. Third, provide an instant locker for temporary using lockers to increase the ease of use. Fourth, unlike traditional analog locker, can support better security by using authentication process and log data. Performance evaluation is performed via simulation by making the dummy model. The results of performance evaluation show the proposed system can support efficiently the locker management.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2005.10a
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• pp.247-252
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• 2005

The wedge type rail clamp has the operating mechanism: First, the jaw pad clamps a rail with small clamping force Next as the wind speed increases, the clamping force of the jaw pad is increased by the wedge. In order to design the wedge type rail clamp, we need to determine the proper wedge angle to minimize the sliding distance of a roller and the proper clamping angle of a locker to generate the initial clamping force of a jaw pad. The researches for the proper wedge angle have conducted, and in this study we conducted the investigation to determine the proper clamping angle of a locker in the rail clamp with wedge angle of $10^{\circ}$. Because the initial damping force of the jaw pad was determined by the clamping angle of the locker, in order to carry out the clamping force of a jaw pad, we measured the locking force applied to a locker with respect to the clamping angle of a locker, such as $3^{\circ},\;4^{\circ},\;5^{\circ},\;6^{\circ},\;$ using a pressure gauge, and compared the results with the FEA results.

• The Transactions of the Korean Institute of Electrical Engineers P
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• v.62 no.4
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• pp.175-180
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• 2013

This paper presents the design and implementation of a Bicycle Locker System. Generally DC motor has been used to control a Bicycle Locker System, but DC motor system requires frequent maintenances and its power efficiency is comparatively poor especially under heavy load conditions. In order to improve this difficulties, this paper adopts BLDC motor for a Bicycle Locker System and its motor controller is developed. The performances of locker units are compared between DC motor unit and BLDC motor unit. The motor power consumptions between two motors are discussed. Test results verify that power efficiency of the suggested BLDC drive unit is considerably improved compared to the DC drive unit with load condition.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.11a
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• pp.1115-1118
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• 2007

BitLocker는 2006년에 Microsoft가 새롭게 출시한 운영체제인 Windows Vista에서 처음 사용되는 보안 메커니즘이다. 기존의 다양한 운영체제에서 사용되는 보안 메커니즘은 기본적으로 사용자가 로그인한 후 로그인한 사용자의 데이터를 바탕으로 파일에 대한 암호화, 데이터에 접근에 관한 권한 확인과 같은 방법을 사용하여 데이터를 보호했다. 하지만 이러한 보안 메커니즘은 물리적으로 접근하는 공격방법에는 취약하고, 플랫폼 자체에 대한 신뢰성이 부족하기 때문에 새롭게 Microsoft에서 새롭게 제안하는 보안 메커니즘인 BitLocker는 디스크 자체를 암호화 해서 보호하는 새로운 메커니즘이다. 본 논문에서는 Windows Vista에서 사용되는 새로운 보안 메커니즘인 BitLocker의 운영 메커니즘에 대해서 분석하고 이를 바탕으로 Windows 보안 메커니즘에 대한 취약점을 검증하기 위한 기존 자료로 활용하였다.

• Journal of Digital Contents Society
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• v.18 no.1
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• pp.101-108
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• 2017

In existing public parcel locker, if there is not an empty storage box, it is not used. In existing private parcel locker, because it is a lock-based locker, there is strong weak point in security. To prevent these drawbacks, the proposed private parcel locker has a menu-driven remote control application which is operated on smartphone. The lock release and the security number change by the security number which is stored in the Electrically erasable read-only memory, are possible. As a result, the proposed method has better advantages than the existing methods in terms of unnecessariness of empty storage box check and security by the security number accumulation function and the automatic SMS transmission representing parcel locker operation result.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2003.04a
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• pp.198-202
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• 2003

Tunable laser diode module with 50GHz-spacing internal wavelength locker was developed. Angle tilting dependency on FSR and peak wavelength shift and the proper initial tilting angle was calculated. By tilting the etalon, the response of the internal wavelength locker module was tuned. As a result, the fabricated internal wavelength locker module showed good performance over 62 channels.

• Journal of the Korea Furniture Society
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• v.27 no.2
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• pp.104-110
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• 2016

The aim of this study is to develop and suggest the handle for lockers according to the design process which are used for keeping of student's personal stuffs such as books, writing implements and gym uniform in elementary, middle and high school and university as well. This includes the design development for ILGUMTUR which is specialized for office furniture, but does not own the intellectual property right yet. The design concept based on the domestic locker market survey is recessed handle at low- to intermediate price and it's material should be plastic what is solid and light. The lock system should be constructed by molding process and the name plate can be exchanged every time the owner of locker changes. Contrary to the right angle of it's external appearance, the handle of the locker is designed to be softly round and the simplicity is pursued for an easy production. On the basis of this design concept the sketch has been drawn and upgraded in full by 3D-rendering. Then the mock-up has been completed by 3D printer and ILGUMTUR has obtained a patent for the locking system based on the rotation of 2 circles.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2005.10a
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• pp.1042-1045
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• 2005

The wedge type rail clamp has the operating mechanism: First, the jaw pad clamps a rail with small clamping force. Next as the wind speed increases, the clamping force of the Jaw pad Is Increased by the wedge. The initial clamping force of a jaw pad was determined by the clamping angle of a locker. In this study, we carried out the finite element analysis to evaluate the relationship between the clamping angle of a locker and the clamping force of a jaw pad with respect to the design wind speed, such as 2, 4, 6, 8, and 10m/s, we adopted the wedge type rail clamp fur 50tons class container crane with the wedge angle of $10^{\circ}$.

• Journal of Convergence for Information Technology
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• v.8 no.6
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• pp.193-199
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• 2018

The commonly used delivery system for online merchandise has potential problems, not only missing but also criminal case. Also, the contemporary Kiosk type approach for delivery system has some problems in an initial installation cost, expense of management system and especially security weaknesses in the wireless communication. To resolve these issues, this paper is proposing a securely unmaned smart locker system that can handle up to 64 parcels. This is easily controlled and monitored by a smartphone. In addition to the system, an algorithm is proposed to make the security of wireless communications better. Finally, a method is proposed to minimize the cost of delivery by using centralized server.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2000.10a
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• pp.504-508
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• 2000

본 연구는 WDM(wavelength-division-multiplexed) 전송 시스템에서 안정된 파장의 광 송신기를 설계하고 구현하기 위한 것이다. 기본적으로 광 출력의 안정성을 위하여 10uA 미만의 안정성을 갖는 정전류 회로를 설계하려 했으며, 출력되는 광의 파장은 Wavelength Locker를 이용 에러신호를 검출하고, 이 신호로 레이저 다이오드 모듈 내부의 온도를 제어하여 파장을 조절하였다. 최종적으로 이들은 A/D, D/A 컨버터와 $\mu$-Processor로 구성된 마이컴 회로를 통해서 제어되도륵 하였다. 또한 마이컴 회로는 송신기가 WDM 전송 시스템에 장착되었을 때의 시스템과의 인터페이스를 위한 신호들을 출력할 수 있도록 하였다.