• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.26 no.1
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• pp.6-12
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• 2017

In a large 3D printer when the cooler, which cools the filament, acts in one direction, the area directly exposed to the cooling is cooled to the proper temperature. However, the cooling effect on the opposite area is relatively less. It was found in experiments that filaments with a thickness of over 2 mm exhibit the cooling problem in one directional cooling. Consequently, cooling was performed to prevent the flow-down and to produce firm support leading to an improvement in product quality in extrusion. Further, the lay-up of a 3D printer with five guides combined with a duct was achieved. Analysis showed that the improvement in the cooling effect enables stable extrusion and lay-up and thus, reduces fabrication time.

• Proceedings of the Korean Information Science Society Conference
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• 2005.07b
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• pp.412-414
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• 2005

최근들어 기업의 업무가 더욱 전문화되고 복잡해짐에 따라 워크플로우 시스템도 복잡해지고 다양해 지고 있다. 이러한 문제로 인하여 실제 필요로 하는 프로세스의 관리 및 도출이 요구된다. 본 논문에서는 영향력있는 프로세스를 도출하고 지원하기 위한 워크플로우 마이닝에 관하여 분석한 후 분석을 바탕으로 상관관계분석과 주성분분석을 통하여 워크플로우를 보다 효율적으로 관리할 수 있는 마이닝 규칙을 제시한다.

• Journal of Engineering Education Research
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• v.8 no.2
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• pp.16-23
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• 2005

In knowledge-based information society, national competitive power is determined by human resources rather than by material resources. Therefore, training technicians with new skills has been gathering as a question Polytechnic colleges play an important role in training technicians as a 2 year courses educational institute conducting both master craftsmen and craftsmen and occupational training. At present, an electricity departments of polytechnic colleges should look at the reality of retraining which is taken more time and more budget for graduates' employment in the industries, as reorganizing in knowledge based school subject they also train the students to be the excellent poly technicians who have both theory and practice by reflecting new technology in developing curriculum needed at the jobsite to join in upgrading our country's competitiveness as a go-between technician at the jobsite. In this paper, a four-semester system was investigated to meet the condition of colleges educating the skilled technicians needed the industry by analyzing the status of polytechnic colleges.

• The Journal of Korean Institute for Practical Engineering Education
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• v.1 no.1
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• pp.85-90
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• 2009

In this paper, we looked around a history and trends of domestic & overseas of the system for lifelong vocational competency development, and the vocational education & training system to be operating in Korea Polytechnic Colleges. And we looked around and analyzed the case characteristics their own to be operating in Korea Polytechnic Colleges for lifelong vocational competency development which is based on. It is expected an ability-centered society to build through a reviewing and complement of various related to the lifelong vocational competency development by the complement and introducing the advanced international system which is based on these cases.

• Journal of the Korea Safety Management & Science
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• v.17 no.3
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• pp.89-96
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• 2015

The study was conducted with statical analysis of data (828 data in 2010, 752 data in 2012, 648 data in 2014) in order to evaluate laboratory awareness difference of research employees working in different types of universities. Results of the study were as follows: First, university institutes in the order of polytechnic colleges, university, and junior college showed the highest laboratory safety awareness in 'awareness and education of laboratorial safety regulation' and 'awareness in laboratory risk factors'. Second, the difference in safety awareness of universities by year(years that conducted current status survey) was the highest in year 2014, then in 2010, and in 2008. Third, the difference of research employees working for laboratory safety management by year(years that conducted current status) showed that university had the highest laboratory safety awareness in year 2010, but it changed to polytechnic colleges in year 2012 and 2014. Through this study, we could recognize the difference in safety awareness of research employees working in university institutes.

• Proceedings of the IEEK Conference
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• 2008.06a
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• pp.1193-1194
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• 2008

In this paper, we propose application training kit using parallel port circuit of standard architecture in computer system. The proposed training kit is verified through the design of hardware board and a virtual driving test using GUI method in VC++ under window XP operating system.

• Proceedings of the IEEK Conference
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• 2008.06a
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• pp.525-526
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• 2008

This paper proposes a new high-speed level shifter using a special high voltage device with low threshold voltage. Also, novel low voltage swing method is proposed. The high voltage device is a standard LDMOS(Laterally Diffused MOS) device in a $0.18{\mu}m$ CMOS process without adding extra mask or process step to realize it. A level shifter uses 5V LDMOSs as voltage clamps to protect 1.8V NMOS switches from high voltage stress the gate oxide. Also, level-up transition from 1.8V to 5V takes only 1.5ns in time. These circuits do not consume static DC power, therefore they are very suitable for low-power and high-speed interfaces in the deep sub-quarter-micron CMOS technologies.

• Proceedings of the IEEK Conference
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• 2008.06a
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• pp.1129-1130
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• 2008

고령사회로 진입함에 따라 보행보조기의 관심이 증가되고있다. 고령자는 로봇의 조작능력이 매우 떨어지기 때문에 외부환경변화(장애물, 위험상황)에 민첩하게 대응할 수 없다. 본 논문에서는 보행보조로봇 사용자가 구동 중 실수를 하더라도 진행하고자 하는 방향의 장애물 대하여 안전하게 회피하는 방법을 제안한다. 보행보로로봇에 레이져 센서를 정면에 장착하여 장애물을 판단하고 로봇이 회피 또는 정지하도록 하였다.

• 한국IT서비스학회:학술대회논문집
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• 2008.11a
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• pp.411-414
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• 2008

해상사고로 인한 송전선로의 보호를 위해 Scan Laser Range Finder를 사용하여 해상에서의 일정한 높이에서 수평으로 레이저빔을 조사한 후 높이 기준을 넘는 선박을 검지하여 좌표와 속도를 측정하여 경보방송 및 무선 통신으로 회항을 유도하여 송전선을 감시 및 보호하는 기술개발로 산업 현장에서의 적응력을 높이는데 기여할수 있을것으로 보인다.

• Proceedings of the KAIS Fall Conference
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• 2007.11a
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• pp.188-190
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• 2007

본 논문에서는 유아들의 환경 교육 효과를 증대하기 위하여 집중력이 약한 유아들의 특성을 고려하여 3D MAX를 이용한 3D 애니메이션을 설계 구현하였다. 본 애니메이션을 이용하여 수질오염의 원인과 환경을 보호해야 하는 이유를 알아보고 유아들의 환경보전에 대한 인식과 태도를 형성하여 환경보호를 행동으로 실천 할 수 있도록 도움을 주는 데에 그 목적이 있다.