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공공조달 참여와 기업성장: 기업연령의 조절효과를 중심으로
이민철,정태현,Lee, Mincheol,Jung, Taehyun 기술경영경제학회 2021 기술혁신연구 Vol.29 No.3
공공조달에 대한 산업정책과 혁신정책 관점의 중요성이 최근 부각되고 있다. 특히, 공공조달이 중소기업의 성장과 혁신에 직접 영향을 끼치는지에 대한 논의와 연구가 있어 왔다. 이러한 연구의 연장선상에서, 본 연구는 공공조달에 참여하는 기업의 특성 중 기업의 연령이 성장에 대한 공공조달의 효과를 조절하는지를 분석한다. 분석 자료는 2006년부터 2017년까지 조달청 우수제품으로 지정된 약 1,247개 기업의 재무적 성과와 공공조달 매출 성과를 연계하여 구축하였다. 패널회귀모형을 통해 분석한 결과, 공공조달 참여 정도가 큰 기업일수록 높은 성장률을 보였을 뿐만 아니라, 이 관계는 젊은 기업일수록 더 강하게 나타났다. 이 결과는 공공조달의 효과에 대한 기존 학술적 논의에 기여할 뿐만 아니라 공공조달 정책 수립에 있어서도 의의를 가진다. The importance of industrial policy and innovation policy perspectives on public procurement has recently been highlighted. In particular, there have been discussions and studies on whether public procurement directly affects the growth and innovation of SMEs. As an extension of this study, this study analyzes whether the age of a firm moderating the effect of public procurement on growth among the characteristics of firms participating in public procurement. The analysis data was constructed by matching the financial data of about 1,247 firms designated as excellent products by the Public Procurement Service(PPS) from 2006 to 2017 and the public procurement sales. As a result of analysis through the panel regression model, firms with a greater degree of public procurement showed a higher growth rate, and this relationship was stronger with younger firms. This result not only contributes to the existing academic discussion on the effectiveness of public procurement, but also has significance in the establishment of public procurement policy.
이원희(Wonhee Lee),김동수(Dongsoo Kim),김정수(Jungsoo Kim),이민철(Mincheol Lee),장민호(Minho Jang) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
The digital three dimensional (3D) real object duplication system (RODS) consist of a optical 3D scanner and a solid freeform fabrication (SFF) system for office type. It can scan a 3D object rapidly, transmit data to other system and reproduce the copy thereof rapidly. In this research, full automatic 3D scanner and SFF system was developed. The 3D scanner has the motion stage of four axes. And the SFF system developed based on three dimensional printing (3DP) process. Also, the performance of developed system was evaluated. As the result, the duplication error of part was 300,㎛(X), 300,㎛ (Y), and 800,㎛(Z) respectively.
이원희(Wonhee Lee),김동수(Dongsoo Kim),김정수(Jungsu Kim),이민철(Mincheol Lee) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
3DP(three dimensional printing) technology is one of SFF(solid freeform fabrication) technologies which have recently come into a spotlight due to its adaptability to various applications. This technology has a great advantage in terms of short fabrication time for a prototype at a low cost, especially when it comes with multi-nozzle inkjet printing technology. However, it has also a disadvantage since it requires additional curing time, after jetting a binder material, and post-processing time in order to increase the mechanical strength of a product. In this study, a novel 3DP process is proposed to overcome slow solidification and elaborate post-process by adopting photo curing method into the conventional 3DP process. Mechanical properties, such as tensile and bending strengths, of specimens fabricated with thc proposed 3DP process were measured and compared with those fabricated with the conventional 3DP process. As a result. it is found that mechanical strengths of specimens from the proposed novel 3DP process show over 10 times higher than those from the conventional 3DP process.
광 경화성 수지를 이용한 파우더 기반의 3DP 공정 및 강도 특성
이원희(Wonhee Lee),김동수(Dongsoo Kim),김정수(Jungsu Kim),이택민(Taikmin Lee),신동윤(Dongyun Shin),이민철(Mincheol Lee) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
3DP(three dimensional printing) technology is one of SFF(solid freeform fabrication) technologies which have recently come into a spotlight due to its adaptability to various applications. This technology has a great advantage in terms of short fabrication time for a prototype at a low cost, especially when it comes with multi-nozzle inkjet printing technology. However, it has also a disadvantage since it requires additional curing time, after jetting a binder material, and post-processing time in order to increase the mechanical strength of a product. In this study, a novel 3DP process is proposed to overcome slow solidification and elaborate post-process by adopting photo curing method into the conventional 3DP process. Mechanical properties, such as tensile and bending strengths, of specimens fabricated with the proposed 3DP process were measured and compared with those fabricated with the conventional 3DP process. As a result, it is found that mechanical strengths of specimens from the proposed novel 3DP process show over 10 times higher than those from the conventional 3DP process.
미분탄 화염 영상 분석을 통한 취입랜스 최적 제어 기법 개발
김지언(Chiyen Kim),이민철(Mincheol Lee),백준영(Junyoung Baek),정도영(Doyoung Jeong),안영진(Youngjin Ahn) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
This paper introduces the automatic fine Bituminous Coal injection lance position control method using flame image process. The fine Coal injection lance is used to supply additional heat into the furnace in Mill plant. It injects fine coal into high pressured air flow and produces very heated and high pressured flame. For the such high temperature and pressure, the fine coal injection lance effects not only efficiency of burner but also furnace abrasion. To keep efficient combustion status and to avoid the abrasion, in this paper, the flame is monitored by computer image process. This paper proposes the flame image process method and lance position control according to calculated result for flame image process.
사례분석을 통한 3D 상용 어플리케이션 기반 BIM 데이터의 상호연동성 개선방향에 관한 연구
김지원(JiWon Kim),이민철(MinCheol Lee),최정민(JeongMin Choi),옥종호(JongHo Ock) (사)한국CDE학회 2009 한국CDE학회 논문집 Vol.14 No.6
Construction industries have increasingly utilized Building information Modeling (BIM) technologies. Interoperability - the capability for BIM data to run from one computer application to another in the life cycle of a project - has become one of the principal research areas. Enhancing interoperability inevitably requires information structures that are standardized throughout the construction industries. As a candidate of the data exchange standard, Industry Foundation Classes (IFC) has been developed and several researches recently performed to measure its richness of digital data exchange. But doubts have been brought up whether IFC meets a sufficient level of interoperability since the research result revealed a number of cases of information misrepresentation and loss. This research presents the lessons learned from the interoperability tests of three widely used 3D design applications including Graphisoft’s Archicad, Autodesk’s Revit, and Bentley’s Bentley Architecture. One building’s architectural and structural design data were modeled with the three tools and exchanged through IFC respectively for interoperability test.
농축산식품산업 특수분류 기반 추정적격률을 이용한 모집단 추정
위성승 ( Wee Seong Seung ),이민철 ( Lee Mincheol ),김진민 ( Kim Jin Min ),신용태 ( Shin Yong Tae ) 한국정보처리학회 2023 정보처리학회논문지. 소프트웨어 및 데이터 공학 Vol.12 No.3
농림축산식품부는 2008년 조직개편을 통해 식품 정책에 대한 기능이 이관되어 보건복지부 등에 산재하여 있던 식품산업을 통합관리 하게 되었고, 1, 2, 3차 산업을 포괄한 종합 정책을 수립하고 있다. 최근 4차 산업혁명과 더불어 농축산식품산업에도 스마트팜, 푸드테크 등 새로운 사업개념이 등장하였다. 농림축산식품부는 4차산업에 적합한 정책을 수립하기 위해 농축식품산업의 사업체 규모를 정확히 추정하는 것이 필요하게 되었다. 농림축산식품부는 전방과 후방 산업의 연계분석을 통한 부가가치 산출과 농축산식품산업의 정확한 모집단을 추정하기 위해서 2017년부터 농축산식품산업 특수분류를 위해 연구하기 시작하였고 통계청으로부터 농축산식품 특수분류 승인을 받았다. 특수 분류를 기반으로 한 농축산식품산업의 모집단 추정은 매출액, 종사자 수 등 전 산업에서 차지하는 비중이 정책의 수립과 중요도에 많은 영향을 미치기 때문에 매우 중요하다. 본 논문은 농축산식품 특수분류와 한국표준산업분류에서의 추출된 표본을 이용하여 현재적격률을 산정하고 모집단을 추정하는 과정과 현재적격률을 보완하기 위한 추정적격률을 제안하여 보다 모집단을 잘 반영하는 방안을 제시하고자 한다. Through reorganization in 2008, The ministry of Agriculture, Food and Rural Affairs integrated management of the food industry by transferred functions which was scattered in the Ministry of Health and Welfare, and established comprehensive policies covering the primary, secondary, and tertiary industries. In the agricultural industry sector, new business concepts such as smart farm and food tech have recently emerged alongside the fourth industrial revolution. In order for the Ministry of Agriculture, Food, and Rural Affairs to develop appropriate policies for the fourth industrial revolution, it is necessary to accurately estimate the size of agricultural and livestock-related businesses. In 2017, the Ministry of Agriculture, Food, and Rural Affairs initiated research for the agriculture, livestock and food industry's special classification, which was approved by the National Statistical Office in 2020. The estimation of the agriculture, livestock and food industry's size based on special classification is crucial because it has a substantial impact on the formulation and significance of policies. In this paper, the appropriate rate was derived from samples extracted from the special classification and the Korean standard industrial classification. Proposed are a method for estimating the population of the agricultural and livestock food industry, as well as a method for calculating the appropriate rate that more accurately reflects the population than the method currently in use.