• Journal of the Korea Convergence Society
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• v.13 no.1
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• pp.235-252
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• 2022

This study empirically identified how technological innovation capability and technological commercialization capability affect management performance in the metropolitan area of Ppuri corporation. As results of the research analysis, First the average company performance in the field of new materials and platform processing technology was higher than that of the metal-oriented processing technology field. Second, technological innovation capability variables are included as R&D capability, technological innovation regime, and technological accumulation capability are shown the statistically significant on non-financial performance. Commercialization capability, producing capability, and marketing capability variable are statistically significant on financial performance.

• Transactions of Materials Processing
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• v.32 no.5
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• pp.247-254
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• 2023

This study conducted the wear tests on bending punches coated with PVD CrN and examined the surface quality of the product formed by each punch in the forming of uncoated TRIP1180 sheets. The study quantitatively estimated the surface quality of the product by measuring the roughness and imaging the product surface. The correlation between the punch wear depth and the product surface roughness was quantitatively analyzed. The results showed that before failure occurs, the product roughness was comparable with that of the as-received, and the product surface was smooth without scratches and defects. However, after failure, the punch wear is caused by fretting wear mechanism, and a punch whose coating is not completely peeled plows the product surface, resulting in severe scratches with grooves and ridges on the product surface. Severe wear on the punch surface caused by fretting wear can rapidly degrade the product surface quality as it is directly affected by the punch surface condition, and the product surface quality accurately reflects the punch wear condition.

• Journal of the Korean Society for Precision Engineering
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• v.34 no.1
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• pp.13-17
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• 2017

The sectors of the Root industry include casting, plastic works, welding, surface treatment, and heat treatment. While the industry is concerned with the processing technologies that are used in most of the manufacturing industries, the sophistication of the corresponding manufacturing information systems is very low. This paper describes a manufacturing information system for the building sector for which the smartphone devices that the workers use in their daily lives are employed, and where the cost of the adaption of the manufacturing system at their factories is minimized. The proposed system consists of the following three parts: UI composer, General Application, and Gateway.

• Journal of the Korean Society for Precision Engineering
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• v.34 no.1
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• pp.23-27
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• 2017

This paper aims to develop a prediction model for the product quality of a casting process. Prediction of the product quality utilizes an artificial neural network (ANN) in order to renovate the manufacturing technology of the root industry. Various aspects of the research on the prediction algorithm for the casting process using an ANN have been investigated. First, the key process parameters have been selected by means of a statistics analysis of the process data. Then, the optimal number of the layers and neurons in the ANN structure is established. Next, feed-forward back propagation and the Levenberg-Marquardt algorithm are selected to be used for training. Simulation of the predicted product quality shows that the prediction is accurate. Finally, the proposed method shows that use of the ANN can be an effective tool for predicting the results of the casting process.

• 월간산업보건
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• s.335
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• pp.2-5
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• 2016

• Transactions of Materials Processing
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• v.31 no.6
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• pp.376-383
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• 2022

The potential damage region of a WC-Co cemented carbide die is investigated for cold forging process of a wheel-nut by numerical simulation with its chemical composition considered. Numerical simulation is utilized to calculate internal stress, especially for the WC-Co die, during the forging process. Finite element model is established, in which the elasto-plastic properties are applied to the work-piece of bulk steel, and elastic properties are considered for the lower die insert of the WC-Co alloy. This stress analysis enables to distinguish the potential damage regions of the WC-Co die. The regions from calculation are comparatively analyzed along with the crack area observed in the die after repetitive manufacturing. Effect of chemical composition of the WC-Co is also evaluated on characteristics of potential damage region of the die with variance of mechanical properties considered. Derived from Mohr-Coulomb fracture model, furthermore, a new stress index is presented and used for die stress analysis. This index inherently considers hydrostatic pressure and is then capable of deducing wide range of its distribution for representing stress state by modification of its parameter implying pressure sensitivity.

• Digital Contents
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• no.4 s.47
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• pp.18-21
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• 1997

국내 데이터베이스산업은 아직 확고한 뿌리를 내리지 못하고 있다. 정부에서 추진하고 있는 초고속망 구축사업은 나름대로 데이터베이스산업의 정착에 중요한 인프라로 볼 수 있다. 이에 국내 데이터베이스산업의 미래에 대해 살펴보고자 한다.

• The Safety technology
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• no.107
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• pp.72-73
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• 2006

"습관을 바꾸면 인생이 바뀐다."는 말이 있다. 스티븐 코비가 지은 "성공하는 사람의 7가지 습관"에 나오는 말들은 우리가 익히 알고 있는 내용들이다. 예를 들어 목표를 가지고 행동으로 실천하라, 일의 순서를 정하고 중요한 것부터 처리하도록 하라, 경청한 다음 이해시켜라 등 그리 어려운 얘기들이 아니다. 하지만 왜 성공하기가 어려운 것일까? 스티븐 코비는 이렇게 말한다 '악의 이파리를 수천 개 잘라내는 것 보다 뿌리를 잘라 내는 것이 더 낫다' 우리가 자신의 태도와 행동에 지엽적인 변화만 주는 것을 그만두고, 그 대신 자신의 태도와 행동의 근본 뿌리인 패러다임을 변화시킬 때라야 비로소 획기적 개선을 달성할 수 있는 것이다.

• The Science & Technology
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• v.33 no.10 s.377
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• pp.25-27
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• 2000

20세기 인류생활에 가장 큰 공헌을 한 공학기술은 전기와 전자공학 분야이다. 전기ㆍ전자공학의 뿌리를 찾는다면 1백년 전 2천개의 특허를 낸 에디슨의 업적에서 비롯된다. 오늘날 우리에게는 산업혁명에 견주어지는 기술혁명을 겪고 있는데 이러한 기술혁명은 진공관으로부터 트렌지스터, IC, VLSI로 변천해오면서 발전된 반도체기술을 기반으로 디지털기술이 발전되었고 이를 통해 생겨난 디지털 혁명이 바로 그것이다.

• 열린충남
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• s.54
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• pp.6-9
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• 2011

올해 2회를 맞이하는 2011금산세계인삼엑스포는 9월 2일부터 10월 3일까지 32일간 금산군 신대리 국제인삼유통센터 일원에서 "생명의 뿌리, 인삼"이라는 주제로 개최된다. 인삼을 통한 금산지역의 경제적 도약과 건강 생명도시로서 금산의 미래 비전을 제시하는 세계적인 수준의 엑스포이다. 자연의 과학이 만든 생명밸런스라는 부제 아래 인삼의 생명산업화의 가능성을 보게 될 행사 속으로 미리 떠나보자.