• 프린팅코리아
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• v.11 no.12
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• pp.116-119
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• 2012

2012년 한국인쇄학회 추계학술논문발표회가 지난 11월 2일 동국대학교 문화관 덕암세미나실에서 열렸다. 올해 창립 30주년을 맞은 한국인쇄학회는 이번 추계학술논문발표회에서 Reverse Offset에서 잉크전이 유동에 관한 시뮬레이션 연구, 그라비어 오프셋 인쇄에 의한 미세전극용 Ag Paste 개발, 국내 하프톤 스크린 인쇄를 위한 최적의 스크린 망사 선택 방법에 관한 연구, 친환경과 표준인쇄를 고려한 인쇄 최적화에 관한 연구 등을 발표했다. 본지에서는 김준곤, 구철회, 조가람(부경대학교 공과대학 인쇄정보공학과)의 '친환경과 표준인쇄를 고려한 인쇄 최적화에 관한 연구'를 게재한다.

• The Journal of the Korea Contents Association
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• v.13 no.8
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• pp.360-370
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• 2013

As the mobile telecommunications service market grows rapidly, interconnection opportunities from the fixed network to the mobile network increase and the land-to-mobile (LM) interconnection charge becomes critical factor in competition between fixed and mobile telecommunications service providers. This paper aims to evaluate the LM interconnection charge level in Korea in comparison with those of 36 foreign countries and suggest the regression model for the LM interconnection charge. Based on the regression analysis, we found that regulation, GDP per capita, wire telephone penetration, liberalization are identified as significantly affecting factors on the LM interconnection charge level, and the level of the LM interconnection charge is comparatively low.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.10a
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• pp.498-500
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• 2012

MVNOs(Mobile Virtual Network Operator) provide mobile services without the own spectrum license and they lease the wireless networks from mobile network operators. They provide more covered service simple resellers have served. Most of MVNO provided in Korea have facilities related to subscribers not lines and switches. Therefore interconnection between MVNO and the other operators is performed by mother mobile operators. Recently following to reform the Business Act of Telecommunications, MVNOs are allowed to interconnect directly to others and there are concerning problems to this. This paper reviewed the status of MVNO regulations for major countries and draw from implications for establishing the MVNO regulations in Korea.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.36 no.1
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• pp.60-65
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• 2000

The virtual mass of net is an important parameter in the analysis and control of net movement in the water. This experiment was performed with the purpose of getting a relation on the quantity of netting and virtual mass of trawl nets using the circulating water channel that can control flow speed. Twelve types of conical nets were examined. Resistance of the conical net at the steady and acceleration state was recorded as text on the personal computer through the tension meter and current meter. The results were obtained as follows ;1. Resistance(R) of the conical net is proportional to the degree of attack angle in the sam e amount of twine material.2. Coefficient of the resistance(Cd)could be defined by the following regression model as a function of Reynolds Number(Re). Cd=0.039Re-0.14743. Resistance(R) is proportional to TSA(Twine surface area) and defined as follows; R=21.398TSA-0.12194. Coefficient of virtual mass(CM) could be calculated by the following first order regression model. CM=37.557U-8.96845. Virtual mass is directly proportional to Volume of net(V) or d/l.

• Journal of the Korean Geosynthetics Society
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• v.2 no.1
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• pp.27-37
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• 2003

The factors affecting shear strength and friction characteristics of the fiber-mixed soil can be classified into engineering properties of soil; particle-size, distribution, and particle shape, physical and mechanical properties of fiber; shape, length, diameter, tensile strength, elastic modulus, friction coefficient, and mixed ratio and external factors; confined stress and compaction condition. In this study, a series of shear friction tests and pull-out tests were performed to evaluate the friction properties of fiber-mixed soil according to soil type, fiber type, fiber mixed ratio and compaction degree. The materials and test conditions used in this study are as follows. Soils: SM and ML; mixing fibers: three types of polypropylene fibers(net type 38mm and 60mm, and line type 60mm); reinforcement: geogrid; mixing ratio: 0.2% and 0.3%; degree of compaction : 85% and 95%.

• Journal of the Korean Graphic Arts Communication Society
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• v.28 no.1
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• pp.43-50
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• 2010

The 200mesh screen was tensioned and fixed on a frame. When applied tension to 5N and 10N per unit area, a side length of opening of the screen was 163.223${\mu}m$ and 168.224${\mu}m$, respective. But side length not tensioned was 158.879${\mu}m$. We knew that a side length of opening of the screen rarely changes with tension applied to the screen. The appearances that a side length of opening of the screen expand little are due to a decreasing diameter of thread by means of tension. In a thickness measurement of screen, While the high density mesh screen that had a lot of knots that crossed a line of latitude and longitude per unit area appeared a higher numerical value, the low density mesh screen that had a few knots appeared a low numerical value.

• Proceedings of the Safety Management and Science Conference
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• 2006.04a
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• pp.109-114
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• 2006

공급망사슬관리(Supply Chain Management : SCM)의 기법이 도입되어 운영되는 한편에서는 최근의 RFID(Ratio Frequency IDentification)의 활용등 SCM, VMI의 Visibility 향상과 유비쿼터스 비즈니스 환경의 실현을 가능하게 하는 신기술들의 상용화가 일부 선진국에서는 기업들의 RFID 기술접목 도입등에 힘입어 더욱 빨라질 것으로 전망된다. 특히 SCM 간의 정보공유와 협력을 바탕으로 고객관리, 서비스, 수요예측, 구매, 마케팅, 물류, 재고관리 전반을 효율화함과 동시에 RFID의 신기술을 접목하는 IT시스템 도입으로의 발전은 피할 수 없는 우리 기업의 경영전략이 되었다. 본 연구의 목적은 유통업체와 제조업체의 재고운영을 위한 재고관리, 결품방지의 효과에 대한 실태를 분석하고 KPI지수 요인과, 수요예측과의 상관관계를 검증, 고찰하여 재고운영에 관한 문제점과 해결방안을 모색하고 더 나아가 RFID 신기술 접목을 위한 환경모델을 제시하고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2001.10b
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• pp.1103-1106
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• 2001

초고속국가정보통신망 이용기관정보관리시스템은 사업 정책에 따라 지난 '97년 신규 구축된 이래 총 4차례의 수정 구축을 거듭해왔다. 그에 따라 신규 구축 당시에 비해 처리량이 5배 가량 증가하였으며 국가망사업자와의 시스템연동, 표준코드수용, 이용요금 정산기능, 웹서비스 제공, 망관리시스템 기초자료 관리 등 수 차례 기능 확장이 이루어져 왔으나, 과다하게 소요되는 처리 속도, 실시간 자료 처리 불가 등 현재 현저한 시스템 성능 저하에 직면하게 되었다. 본 논문에서는 현재 시스템의 성능 저하 요인을 분석하고 개선안을 제시한다.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.36_37
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• 2009

2003년 8월14일 북미는 사상최대의 대정전 사고를 경험하였다. 입법과정을 통하여 전기신뢰도기구가 창설되고, 신뢰도 기준을 법제화하는 등 후속조치가 진행되었다. 미국 원자력규제기관은 송전망 관련사건 분석을 통해서 송전망사고가 점차 대형화되어, 소외전원 상실을 비롯한 발전소 교류전원상실이 안전을 위협할 수 있다는 것을 확인하였다. 비록 2003 대정전으로 인한 원전사고는 없었지만, 문제점을 인식하고, 원전연계요건을 포함한 원전-송전계통 사업자 조정 기준을 법제화하여 원전안전성을 보장하도록 하였다. 이와 같이 변화된 규제환경 및 동향과 아울러 전기신뢰도 확보를 비롯한 원전의 안전성을 확보하는 최근 미국 규제기관의 노력을 확인하여 교훈을 얻고져 한다.

• Magazine of the Korean Society of Agricultural Engineers
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• v.42 no.6
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• pp.90-97
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• 2000

In this study, the variation of unit weight and unconfined compressive strength were investigated, calcium carbonate, quicklime, portland cement, 19mm length monofilaments and fibrillated fiber were used as reinforcement materials. And calcium chloride was added to cement and calcium carbonate reinforced soil mixture in order to accelerate setting and hardening speed. It appears that unit weight is highest in calcium carbonate reinforced soil mixture with mixing rate of 9%. According to increasing the amount of fiber in soil mixture, the unit weight decreased. It shows that the more the amount of monofilament fiber is added in soil mixture, the higher the compressive strength is, but the compressive strength is decreased in fibrillated fibrillated fiber added soil mixture with more than 1.0% of mixing rate.