• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2014.10a
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• pp.138-140
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• 2014

The image quality of the color laser printer is highly related with the motion quality of actuators. However, the high precision system requires high production costs in general. The proposed design method in this paper improves image quality without increasing production costs. Using the synchronization method, time gap between exposure and transfer in organic photo conductive (OPC) drum and the period of driving gear revolution are synchronized. The proposed method is verified by computer simulations and experiment, and showed by printed images.

• Journal of Information Management
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• v.19 no.1
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• pp.30-49
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• 1988

To design and implement a barcode system in the process of library automation, a thorough understanding of the elements of a barcode system is essential. This paper is to provide the basic features of barcoding along with discussions of the selection criteria of the symbology, media, printer, operator, scanner, decorder and a methodology of library's approach.

• The Journal of the Korean dental association
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• v.56 no.6
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• pp.339-347
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• 2018

Conventional mouthguard fabrication process which consists of elastomeric impression taking and followed gypsum model making is changing into intraoral scanning and dental model printing with 3D printer. In addition, new 3D printing materials for mouthgurad, 3D Computer-Aided Design(CAD) software for dental appliance, evaluation of a virtual dentoalveolar model for testing virtually 3D designed mouthguard, and lightweight sensor technology will lead dental professionals to the new era of Sports Dentistry, including information technology integrated custom mouthguard fabrication and creating value with analytic data acquired from sensors in mouthguard.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.1005-1008
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• 2012

기업의 기술이 점점 고도화가 진행되면서 문서유출사건에 대한 기업의 피해가 매년마다 증가하고 있다. 특히 내부직원에 의한 유출사건이 크게 증가함으로써 기업은 내부의 보안수준을 올리고 있다. 이에 기업 내 출력물 보안을 위하여 프린터 보안 솔루션을 도입하지만 강한 보안성으로 인하여 인쇄가 많은 기업이나 부서에서는 잦은 사용자인증에 불편함을 느낄 수 있다. 따라서 본 논문에서는 기존의 출력물 보안 서비스에서 사용자인증의 간소화와 PDF를 통한 권한문서관리 방식을 통하여 보다 향상된 출력물 보안 솔루션을 설계하고 구현하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.778-781
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• 2011

기업의 기술이 점점 고도화가 진행되면서 문서유출사건에 대한 기업의 피해가 매년마다 증가하고 있다. 특히 내부직원에 의한 유출사건이 크게 증가함으로써 기업은 기업 내부의 보안수준을 올리고 있다. 이에 회사 내 출력물 보안을 위하여 기업은 프린터 보안 솔루션을 도입하지만 강한 보안성으로 인하여 인쇄가 많은 기업이나 부서에서는 잦은 사용자인증에 불편함을 느낄 수 있다. 본 연구는 기존의 출력물 보안 서비스와 비교하여 티켓을 이용한 사용자인증의 간소화와 권한문서관리를 제공하는 출력물 보안 솔루션을 설계하고 구현하였다.

• Journal of the Korean Institute of Telematics and Electronics
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• v.23 no.6
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• pp.944-949
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• 1986

By improving the ability of arithmatic processing with an arithmatic processor in a microcomputer and realizing the data input system for real time analysis, an FFT analyzer that is usable within the range of audio frequency is designed and constructed. The input signal passes through a gain programmable pre-amplifier and anti-aliasing lowpass filter into an analogditital converter to be converted into digital form. The converted input data is processed by an Apple II microcomputer. The results of the processing are displayed using a microcomputer display unit and can be copied on a printer or stored in a floppy disk.

• Journal of the Korean Institute of Telematics and Electronics
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• v.24 no.2
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• pp.331-337
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• 1987

This is paper, we represent the laser printing system as the new technique in computer output printing. Laser printer, which can process a lot of information for high speed and high resolution, has been designed and realized in our design performance. Optical signal processing and data processing technique are described. Also the requirements for the optical components and their implementations are discussed. The arbitrary patterns, Korean and Chinese characters are given as printed outputs actually.

• Journal of Wind Energy
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• v.5 no.1
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• pp.33-42
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• 2014

The new aerofoil, KA2 was designed to apply to the wind turbine blade. For the aerofoil, numerical analysis was performed to review aerodynamic characteristics like lift and drag coefficient. And they are verified with test data using the digital wind tunnel and test samples from 3D printer. The digital wind tunnel was developed to test wing in the small laboratory, and verified with test of NACA0012 airfoil. KA2 aerofoil is asymmetric, and has the thickness ratio of 14%, and 12 degree of AOA at the maximum lift coefficient of 1.3. In this paper, aerodynamic characteristics from numerical and test approaches will be proposed with AOA in detail. Therefore, this aerofoil will be used for the design of wind turbine blade.

• Nuclear Engineering and Technology
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• v.56 no.7
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• pp.2474-2479
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• 2024

In-Vessel Retention (IVR) is a key technology to retain the molten core in the reactor vessel during severe accidents of Pressurized-water reactors (PWRs). In order to gain the safety margin of IVR, it is crucial to enhance the critical heat flux (CHF) of the reactor vessel, which is submerged in a water pool. To enhance the CHF, we have designed and additive-manufactured porous grid plates with a 3-D printer for design flexibility. We measured the CHF for the porous grid plate on the boiling heat transfer surface and found that the CHF was enhanced by 50 % more than that of the bare surface. The CHF enhanced more with a narrower grid pitch and a lower grid height. The visual observation study revealed that the vapor film was formed at the bottom of the grid plate.

• Journal of the Korea Fashion and Costume Design Association
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• v.18 no.3
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• pp.245-260
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• 2016

This study explored cases of 3D printing utilization in domestic and overseas fashion industries, and presented utilization strategies for fashion design departments in universities in future by grasping characteristics of newly appearing distribution types through 3D printing. Cases of producing costumes using 3D printing in fashion industry comprised a bikini using the material of Nylon12 that continuum fashion demonstrated, innovative 3D costumes by Iris Van Herpen, Tweed Suit using the material that Chanel manufactured with 3D printing technology, but they were limited to experimental fashion works due to limitations of 3D printer material and printing size. On the other hand, in fashion accessories, with jewelry and shoes at the head of the list, MCM and Kipling also demonstrated bags using this technology, and Elvis Pompilio and Gabriela Ligenza demonstrated 3D printing hat products as well. Except the above, as in glasses and neckties utilizing 3D printing, owing to reduced limitations of time, size and material, 3D printing was found to be utilized in fashion accessories other than costumes. Recently there has been a new consumption and distribution structure coming up focusing on 3D printing technology. That is, in overseas countries, content platforms sharing products modeled by oneself has rapidly appeared, and in our country as well, funnypoly, a 3D content platform appeared in 2015. The appearance of these new types of distribution structures means that the common people can produce design contents, and we believe that it may bring about a change in the traditional way of distribution structure. To walk in step with this change, it is believed that it is necessary for fashion design departments to raise college faculty members who can educate 3D printing, develop curriculum to educate 3D printing, and develop experiential programs connected with middle and high schools.