• 멤브레인
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• 제30권4호
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• pp.260-268
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• 2020

다층 구조를 가진 5A 제올라이트를 탄소 분자체 분리막에 첨가한 복합막을 제조하고 질소/산소의 분리 특성을 평가하였다. 제올라이트의 첨가는 선택도에는 미세한 영향을 주지만 투과도를 크게 증가시키는 방법으로 전체적인 탄소막의 질소/산소의 분리 성능을 상승시켰다. 특히 메조포어를 함유한 다층구조의 제올라이트 첨가제는 분리막의 투과도를 보다 효율적으로 상승시켜 아주 우수한 분리 성능에 도달하였다. 이 연구의 결과는 저렴한 탄소막 전구체와 제올라이트 소재를 활용하고도 고성능의 질소/산소 분리막을 손쉽게 제조할 수 있다는 것을 제시한다.

• 산업경영시스템학회지
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• 제44권3호
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• pp.165-175
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• 2021

As the advent of the Fourth Industrial Revolution and Information Age, companies are in the state of infinite competition due to the rapidly changing technological environment and fierce competition. In this situation companies are making efforts to gain the competitive advantage by introducing information systems. Supply Chain Management (SCM) is considered a method to gain a competitive edge in rapid change. In fact, companies that already have introduced the SCM system are achieving company renovation with positive effects such as increase of sales stock reduction on-time delivery cost reduction and improved efficiency. This study was started to investigate the resistance that occurs in introducing the SCM system for small and medium-sized manufacturing industries that have not yet introduced the SCM system despite the importance of the SCM system, and to check the effect on the intention of the introduction. As the result of this study, the first is that the company has the higher technological innovation, the more positive the effect on Relative advantage Compatibility Perceived risk, Complexity. Second, The compatibility of the SCM system was rejected in innovation resistance, but it is adopted with the highest impact in the introduction intention. In addition, the mediating effect of innovation resistance was also rejected, confirming that if the SCM system is compatible for the company, it doesn't affect the resistance and is the biggest factor to consider in the introduction of the SCM system. Third, the perceived risk of the SCM system doesn't directly affect the intention to introduce, but has an indirect effect when mediation innovation resistance.

• 기술혁신학회지
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• 제10권1호
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• pp.1-21
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• 2007

기술정책은 기술획득을 위한 민간투자가 적정수준 이하로 과소투자되는 성향을 보전하는 중요한 정책수단이다. 그러나 기술정책과 관련된 정부정책에 대한 정량적 평가는 아직도 초보적 수준에 머물러 있다. 본 연구는 과제수준에서 기술개발지원제도의 성과를 계량경제학적 모형(Probit)을 이용하여 분석하고 있다. 정부의 지원, 민간부문의 대응 투자(현금과 현물), 기술개발과제 수행형태, 수행주체간의 역할 등이 기술적 성과에 미치는 영향을 가설을 검증하는 형태로 살펴보았다. 총투자규모 보다는 투자의 구성 및 내용이 중요하고, 기업의 대응투자, 특히 현금투자의 정도가 기술적 성과에 크게 영향을 미치며, 기업의 현금투자와 현물투자는 대체재 관계라는 정책적 시사점이 높은 결과들이 도출되었다. 이러한 결과들은 향후 추가적인 연구와 더불어 새로운 국가기술 개발지원제도의 기획은 물론 그 효율성 평가에도 많은 도움과 함께 시사점을 줄 것으로 기대된다.

• 한국건설관리학회논문집
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• 제13권4호
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• pp.152-163
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• 2012

건설 프로젝트의 초기 단계인 기획단계에서 산정된 공사비는 발주자의 의사결정에 큰 영향을 미치며, 프로젝트의 성공에 있어 중요한 요소로 작용한다. 그러나 국내 공공아파트 건설프로젝트의 경우, 공사비 예측은 실적데이터를 활용한 면적당 단가 방식에 머물러 있으며, 몇몇의 발주기관을 제외하고는 체계적인 건축공사비 산정 시스템을 구축하고 있지 않기 때문에 사업 초기단계에서 적정한 공사비를 예측할 수 없는 어려움이 따른다. 이에 본 연구는 선행연구에서 제시한 사례기반추론을 이용하는 공사비 예측방법을 사용하여 공공아파트 기획단계 적정 공사비 산정 시스템을 개발하였으며, 시스템 데이터베이스에 포함되지 않은 10개의 공공아파트 프로젝트 사례와 19명의 공공발주기관 실무담당자를 대상으로 시스템의 효용성과 적용된 방법론의 타당성을 검증하였다. 검증결과 평균 6.15%, 표준편차 4.39%의 총 공사비 예측 오차율을 나타내었으며, 공공발주기관의 실무자들은 본 연구에서 개발한 시스템이 현행 공사비 산정업무를 크게 개선할 수 있을 것이라고 평가하였다. 본 연구는 국내 공사비 예측 기술 및 사업비 관리 기술 발전의 토대를 제공하고 공사비 산정결과의 정밀성 및 일관성을 향상시킬 수 있을 것으로 기대한다.

• International Journal of Quality Innovation
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• 제8권3호
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• pp.81-112
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• 2007

In the competitive global market, firms have to keep profit from innovation activities. A firm makes profits by offering products or services at a lower cost than its competitors or by offering differentiated products at premium prices that more than compensate for the extra cost of differentiation. The IC Package and Testing technology industries were the first high technological industry to build in Taiwan. The Package and Testing industries in Taiwan adopted competitive innovation activities to become stronger. In our study, we want to know how innovation activities influence a firm operating in the IC Package and Testing industries. Our study used a questionnaire and Likert five-point scale to survey the innovation activities, customer and feedback in innovation performance in the IC Package and Testing industry. The wafer level chip size packing technology in our study indicates the innovation activities. Because we need to compare the difference between the wafer level chip size packing technology and wire bonding technology to recognize innovation and how the innovator and customer were influenced. Our conclusions are described below: (1) When the innovator adopts innovation activities that can be maintained using experiments and knowledge, using machine and decision variables more quickly will produce success; (2) Innovators should adopt innovation activities that focus on customers that use knowledge and experimentation, training time and cost. If an innovation forces customers to spend much time and cost to learn new technology or applications, the innovation will not be adopted; (3) Innovators that create innovation performance higher than his customers must also consider the impact upon their customers. We have to remind innovator to focus on why their customers have a different level of evolution in the same innovation activities.

• 한국측량학회지
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• 제37권6호
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• pp.571-577
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• 2019

우리나라에서는 2006년부터 항공사진 촬영방식에 디지털 카메라를 도입한 이후 항공사진 촬영과 관련한 기술 패러다임이 아날로그 방식에서 디지털 방식으로 전환되고 있다. 그러나 현재 항공사진 촬영과 수치지도 제작에 대한 표준품셈은 아날로그 기반의 품셈과 디지털 기반 품셈이 혼재되어 활용되고 있다. 항공사진촬영과 관련한 품셈의 개정항목 중에서 월별천후표는 비행기의 운항일수 계산과 밀접한 관련이 있다. 현재의 월별천후표는 1999년부터 2007년 동안의 전운량 관측 자료를 이용하여 계산한 결과를 사용하고 있다. 본 연구에서는 2009년부터 2018년 동안의 전운량 관측 자료를 이용하여 월별천후표의 계산을 연구하였다. 결과적으로 29개의 동일한 지점에 대하여 신규 산출한 평균 쾌청일수는 기존의 50일에서 6일이 감소한 44일로 분석되었다. 최대 쾌청일수 감소는 진주에서 23일로 나타났으며, 최대 쾌청일이 감소한 달은 2월로 나타났다.

• Asian Pacific Journal of Cancer Prevention
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• 제15권23호
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• pp.10057-10059
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• 2015

Positron emission tomography (PET) as the functional component of current hybrid imaging (like PET/CT or PET/MRI) seems to dominate the horizon of medical imaging in coming decades. $^{18}$Flourodeoxyglucose ($^{18}FDG$) is the most commonly used probe in oncology and also in cardiology and neurology around the globe. However, the major capital cost and exorbitant running expenditure of low to medium energy cyclotrons (about 20 MeV) and radiochemistry units are the seminal reasons of low number of cyclotrons but mushroom growth pattern of PET scanners. This fact and longer half-life of $^{18}F$ (110 minutes) have paved the path of a centralized model in which $^{18}FDG$ is produced by commercial PET radiopharmacies and the finished product (multi-dose vial with tungsten shielding) is dispensed to customers having only PET scanners. This indeed reduced the cost but has limitations of dependence upon timely arrival of daily shipments as delay caused by any reason results in cancellation or rescheduling of the PET procedures. In recent years, industry and academia have taken a step forward by producing low energy, table top cyclotrons with compact and automated radiochemistry units (Lab-on-Chip). This decentralized strategy enables the users to produce on-demand doses of PET probe themselves at reasonably low cost using an automated and user-friendly technology. This technological development would indeed provide a real impetus to the availability of complete set up of PET based molecular imaging at an affordable cost to the developing countries.

• 펄프종이기술
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• 제47권6호
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• pp.22-40
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• 2015

Cellulose fibers is one of the most abundant in nature. It has many distinctive features: abundant in nature, biodegradable, non-toxic, eco-friendly, sustainable, easy to fabricate, hydrophilic, and cost-effective. Cellulose fibers, known as pulp, is produced from cellulose-containing materials by the pulping process. As the raw material, wood has been most commonly used while recycled pulp has been also used to some degree. Thus, pulp usually refers to wood pulp. Generally, the pulp and paper industry is regarded as the commodity market where the cost should be much more important than the quality. It also belongs to a mature market where the growth is slow, or even in decline. Accordingly, technological development has been rather stagnant for the industry. Recently, however, the pulp and paper industry has faced very serious challenges. First, due to digital technology, there has been a steady decline in the need for pulp and paper products. The digital industry has continuously replaced printed products such as books, newspapers, and magazines. Second, there has been a trend initiated by developed countries to limit the use of wood as the raw material for the sake of environmental protection. This forces the industry to find a more efficient use of wood pulp as well as finding alternative, non-wood sources. Third, as an individual becomes wealthier and more conscious of health-care, the quality of a product becomes more important than the cost. Thus, a paradigm shift is needed from the cost-conscientious to the quality conscientious. The objective of this article is to review the technologies aimed at engineering cellulose fibers for producing high-value added paper products.

• Nano
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• 제13권11호
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• pp.1850126.1-1850126.10
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• 2018

Flexible strain sensors, as the core member of the family of smart electronic devices, along with reasonable sensing range and sensitivity plus low cost, have rose a huge consumer market and also immense interests in fundamental studies and technological applications, especially in the field of biomimetic robots movement detection and human health condition monitoring. In this paper, we propose a new flexible strain sensor based on thick CVD graphene film and its low-cost fabrication strategy by using the commercial adhesive tape as flexible substrate. The tensile tests in a strain range of ~30% were implemented, and a gage factor of 30 was achieved under high strain condition. The optical microscopic observation with different strains showed the evolution of cracks in graphene film. Together with commonly used platelet overlap theory and percolation network theory for sensor resistance modeling, we established an overlap destructive resistance model to analyze the sensing mechanism of our devices, which fitted the experimental data very well. The finding of difference of fitting parameters in small and large strain ranges revealed the multiple stage feature of graphene crack evolution. The resistance fallback phenomenon due to the viscoelasticity of flexible substrate was analyzed. Our flexible strain sensor with low cost and simple fabrication process exhibits great potential for commercial applications.

• KIEAE Journal
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• 제8권5호
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• pp.69-76
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• 2008

Recent industrial development and technological breakthroughs have made our life much more convenient, however, at the cost of environmental degradation resulting from indiscreet focus on development in combination of disregard of impact on eco system. Notably, global warming is one of the most serious environmental issues, triggering attention for environmental protection in Korea and elsewhere. To address such issues, nations around the world are beefing up environmental regulatory framework such as UNFCCC(United Nations Framework Convention on Climate Change) to tackle environmental challenges from global perspective. Against the backdrop, Korea has been engaging actively in global initiatives to reduce climate change, ratifying UNFCCC in 1993 and the Kyoto Protocol in October, 2002. However, unlike the government responding to environmental degradation in earnest, construction industry is far from making efforts to reduce wastes. Construction waste is a source of environmental deterioration world wide and adds to the aggregate cost that construction companies should assume. Korean construction firms also need to develop initiative aggressively to respond to changes in environmental policies and reduce construction costs. Therefore, this study aims at examining sources of wastes in construction sites and suggest solution in order to prod local construction companies to develop countermeasures.