• Proceedings of the Korean Society of Computer Information Conference
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• 2013.07a
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• pp.93-94
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• 2013

현재 대부분의 교육현장에서는 학생들을 지도하기 위해 기본정보가 기록되어 있는 노트용 교무수첩과 전자교무 수첩을 병행하여 사용하고 있다. 전자교무수첩은 정보를 관리하기 위해 업무용 데스크탑 PC가 대부분으로 휴대성이 어려워 활용도는 아주 미약하다. 본 논문에서는 기존 교무수첩을 스마트폰에 탑재해서 언제 어디서든 장소나 시간에 구해 받지 않고 학생 정보를 조회하여 학생들을 지도 할 수 있는 스마트 교무수첩 시스템을 설계하였다.

• Journal of the Korea Society of Computer and Information
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• v.18 no.11
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• pp.137-143
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• 2013

A teacher needs documented information includes basic information about students and lectures to teach students. Currently, both non-electronic and electronic teachers diary are used in most of the field of education. designed and implemented. The electronic teachers diarys only driven on desktop PC. Therefore, managing school affairs with this un-portable system is very inefficient. In this paper, we designed and Implementation Smart Teachers Diary System to check students' information in any time and place with own smart device.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.05a
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• pp.444-446
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• 2015

요즘 대부분의 사람들이 다이어리를 사용하고 있다. 기존에는 직접 다이어리 수첩을 들고 다녀야 했지만 지금은 대부분 스마트폰에 다이어리 어플리케이션을 사용한다. 하지만 현재 다양한 다이어리 어플리케이션이 개발되고 있지만 기존의 다이어리 어플리케이션과 비슷한 형태로 출시 되고 있다. 이 문제를 해결하기 위하여 본 논문은 일정관리를 하면서 추가적으로 블루투스를 이용한 비콘기능을 사용하여 자동으로 무음으로 변환해 주는 앱을 설계한다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.27 no.7
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• pp.1038-1043
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• 2021

Guaranteed seafarer wage payment is essential to ensure a stable supply of seafarers. However, disputes over non-payment of wages to seafarers often occur. In this study, an automatic wage payment system was designed using a blockchain-based smart contract to resolve the problem of seafarers' wage arrears. The designed system consists of an information register, a matching processing unit, a review rating management unit, and wage remittance before deploying smart contracts. The matching process was designed to send an automatic notification to seafarers and shipowners if the sum of the weight of the four variables, namely wages, ship type/fishery, position, and license, exceeded a pre-defined threshold. In addition, a review rating management system, based on a combination of mean and median, was presented to serve as a medium to mutually fulfill the normal working conditions. The smart contract automatically fulfills the labor contract between the parties without an intermediary. This system will naturally resolve problems such as fraudulent advance payment to seafarers, embezzlement by unregistered employment agencies, overdue wages, and forgery of seafarers' books. If this system design is commercialized and institutionally activated, it is expected that stable wages will be guaranteed to seafarers, and in turn, the difficulties in human resources supply will be solved. We plan to test it in a local environment for further developing this system.

• Korean Journal of Construction Engineering and Management
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• v.12 no.4
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• pp.106-116
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• 2011

It is very important to collect and manage labor information in the construction industry that is labor-intensive. Although research and cases that utilize RFID are increasing for more effective labor management, labor management is limited to the checking-in and -out information management at the entrance of a construction site due to high expense of an RFID reader. Labor and safety information is still managed based on the redundant process that is hand-written in a book and re-input of information by using a personnel-computer. Therefore, the objective of this paper is to develop more effective and efficient process for labor information record and management. This paper presents a prototype application that supports integrated labor information management by incorporating QR-code into RFID-based labor management system and verifies the application through a pilot test and comparison with the existing labor management syste.

• The Journal of the Korea Contents Association
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• v.7 no.8
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• pp.21-30
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• 2007

Due to the growth of embedded systems and the development of semi-conductor and storage devices, digital convergence devises is ever growing. Digital convergence devices are equipments into which various functions such as communication, playing movies and wave files and electronic dictionarys are integrated. Example are portable multimedia players(PMPs), personal digital assistants(PDAs), and smart phones. Therefore, these devices need an efficient file system which manages and controls various types of files. In designing such file systems, the size constraint for small embedded systems as well as performance and compatibility should be taken into account. In this paper, we suggest the partial buffer cache technique. Contrary to the traditional buffer cache, the partial buffer cache is used for only the FAT meta data and write-only data. Simulation results show that we could enhance the write performance more than 30% when the file size is larger than about 100 KBytes.