• 한국진공학회:학술대회논문집
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• 한국진공학회 2011년도 제40회 동계학술대회 초록집
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• pp.351-351
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• 2011

Graphene has drawn great interests because of its distinctive band structure and physical properties[1]. A few of the practical applications envisioned for graphene include semiconductor applications, optoelectronics (sola cell, touch screens, liquid crystal displays), and graphene based batteries/super-capacitors [2-3]. Recent work has shown that excellent electronic properties are exhibited by large-scale ultrathin graphite films, grown by chemical vapor deposition on a polycrystalline metal and transferred to a device-compatible surface[4]. In this paper, we focussed our scope for the understanding the graphene growth at different conditions, which enables to control the growth towards the application aimed. The graphene was grown using chemical vapor deposition (CVD) with methane and hydrogen gas in vacuum furnace system. The grown graphene was characterized using a scanning electron microscope(SEM) and Raman spectroscopy. We changed the growth temperature from 900 to $1050^{\circ}C$ with various gas flow rate and composition rate. The growth condition for larger domain will be discussed.

• 재활복지공학회논문지
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• 제4권1호
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• pp.9-14
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• 2010

인구의 고령화와 국민의 소득증대에 따라 정보통신기술을 활용한 새로운 형태의 보건의료서비스인 유헬스케어에 대한 관심과 보급이 증가되어 가고 있어 이러한 용도의 유헬스 의료기기의 안전성 확보를 위한 사용환경을 고려한 안전성 및 성능 평가방법이 필요하다. 본 연구에서는 유헬스의료기기와 관련된 국제규격(IEC)과 국내규격(KS)을 참고하여 유헬스케어의료기기의 사용환경에 대한 안전성을 평가할 수 있는 기준 및 방법과 전원문제등을 고려한 필수성능을 평가할 수 있는 기준 및 방법을 개발하였다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2017년도 추계학술대회
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• pp.408-411
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• 2017

이 논문은 스마트축사 환경에서의 센서 데이터를 GS1 표준 기반의 EPCIS 이벤트 스키마 설계를 통해 운용하는 방법을 다룬다. 스마트축사 환경에서 사용되는 센서들의 종류를 정의하고, 이러한 센서 정보를 운용하기 위한 GS1 표준 식별자, 표준 이벤트/마스터데이터 구조, 표준 인터페이스로 정보를 설명하며, 스마트축사의 다양한 센서 정보를 저장/공유하는 스키마의 구조를 정의한다.

• 한국레이저가공학회지
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• 제14권4호
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• pp.21-27
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• 2011

In this work, we have studied on time-resolved transient reflective image of single crystalline Si surface after single-shot fs-laser irradiation with varying the laser fluence under two different laser spot sizes. The temporal profiles of transient reflectivity changes as well as its maximum values at the early delay time were found to be strongly dependent on both the laser beam spot size and laser fluence. We have interpreted the dependence of transient reflectivity changes on the laser spot size in terms of a relaxation of the generated free carriers to the bulk silicon, which should be interacted with the plasma.

• 식품산업과 영양
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• 제21권2호
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• pp.1-7
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• 2016

• 한국가스학회:학술대회논문집
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• 한국가스학회 2003년도 추계학술발표회 논문집
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• pp.47-52
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• 2003

• Journal of the Korean Wood Science and Technology
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• 제18권2호
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• pp.67-78
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• 1990

This study was performed to determine the characteristics of physical and mechanical properties of domestic wood based materials; plywood, particleboard, medium density fiberboard. Main items of tested properties were panel size, moisture content, water absorption, linear expansion and thickness swelling, glue bond shear strength, bending properties(stress at proportional limit, modulus of rupture. modulus of elasticity), tensile strength, screw holding strength, and internal bond as neccessary. the results were discussed mainly with Korean Standards. The obtained conclusions are as follows; 1. Length and width of 3mm thin plywood(3-ply) and 12mm thick plywood(7-ply) were satished with KS-standard, but thicknesses of these panels were not- passed tolerance limit except one of eight makers. 2. Length and width of particleboard and medium density fiberboard were greater than the tolerance limit value of KS standard, but the thicknesses of these panels were passed this value. 3. Moisture contents of 12mm thick and 3mm thin plywood were satisfied with KS-standard except one mill made 3mm thin plywood. 4. Moisture absortion of plywood was not passed tolerance limit of KS-standard but particleboard was satisfied with this standard value. 5. Dry and wet shear strengths in glue bond of 3mm thin plywood were not reached to KS-standard, but those of 12mm thick plywood were sufficiently satisfied with KS standrad. 6. Modulus of ruptures, parallel to grain and perpendicular to grain of plywood, and particleboard and medium density fiberboard were satisfied with KS-standard. 7. Tensile strengths, parallel to grain and perpendicular to grain of plywood were satisfied with allowance stress of US product standard PS 1-74. 8. Screw holding strength of particleboard was not reached to KS standard, but internal bond was satisfied with KS standard.

• Journal of the Korean Wood Science and Technology
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• 제45권5호
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• pp.640-649
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• 2017

목조건축의 기반을 넓히고 소비자의 만족도를 향상시키기 위해 기존의 일반목조벽체 및 기타 경량목조벽체에 대한 비교 연구가 필요하다. 따라서 본 연구에서는 일반벽체와 개선된 방식인 교호 샛기둥 벽체와의 성능 비교를 통해 새로운 가능성을 찾고자 하였다. 우선 교호 샛기둥 벽체의 강도적 특성을 평가하고 일반벽체의 강도적 특성을 비교하였다. 일반벽체를 구성하는 목재의 단면이 교호 샛기둥 벽체보다 크기 때문에 일반벽체의 최대하중이 교호 샛기둥 벽체 보다 크게 나타났다. 하지만, 두 그룹간의 통계분석에 의하면 95% 신뢰 수준에서 유의성을 보이지 않아, 교호 샛기둥 벽체는 일반벽체를 대체할 수 있는 가능성을 보여주었다. 교호 샛기둥 벽채는 샛기둥의 단면이 일반벽체보다 작기 때문에 재료를 절약할 수 있어서 일반벽체보다 더 경제적이라고 판단된다. 또한 단열재의 면적 또한 증가하므로 열교 현상의 개선도 기대된다.

• 한국진공학회지
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• 제16권6호
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• pp.397-404
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• 2007

국제표준화기구 (International Organization for Standardization, ISO)의 기술위원회의 하나인 ISO/TC 112 (진공기술위원회)에서는 진공펌프, 진공장치, 진공부품 분야의 진공기술의 표준화를 하고 있다. 본 논문에서는 국제표준화기구에 대한 간략한 소개와 함께 진공기술위원회 ISO/TC 112의 조직과 표준화 규격제정절차나 방법 등을 요약하였으며, 또한 국내에서 최근에 제안한 "열음극 진공게이지 사양"과 "진공밸브시험절차" 핵심내용도 간략히 소개하였다. 국제표준화에 대한이해를 돕고 최근 상황을 소개함으로서 한국에서 더 활발히 진공기술이 발전하고 국제표준화를 선도하는데 도움이 되고자 한다.

• 산업경영시스템학회지
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• 제31권1호
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• pp.116-123
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• 2008

Food and Agriculture Organization (FAO) and many countries make an effort to conserve and utilization of animal genetic resources to prepare for our unpredictable future. In order to protect the customer and the producer from the animal diseases and unjust distribution, many country seek to appropriate solution. Among the solutions, RFID technology can be used as a basic technology, since this technology can be applied in the conservancy and utilization of animal genetic resources, object management for improved animal and traceability of animal's distribution flow. There are two main issues in making the efficient RFID environment. The first issue is the standardization of code system for object identification. International Organization for Standard (ISO) published the standard which regulates RFID of animal (ISO 11784 and ISO 11785). Based on these standards, many countries have tried to establish their national standard. In Korea, National Institute of Animal Science (NIAS) playa main role in establishing the standard of object identification code based on ISO 11784. Even though the standard format of object's identification is well established, the RFID system may not be operated well without the standardization of RFID network and related equipment. In Korea, National Internet Development Agency of Korea (NIDA) has proposed the RFID Network at 2006, which can be applied in the different kind of system at each phase. But, the implementation case of this RFID Network does not reported yet, since many company or agency who introduce RFID technology, implemented as an isolated individual system. In our study, we show that RFID network can be utilized for any kind of system at each phase, and propose the improvement point in order to be widely used.