• 한국지하수토양환경학회지:지하수토양환경
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• 제15권1호
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• pp.1-8
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• 2010

Cometabolic air sparging (CAS) is a new and innovative technology that uses air sparging principles but attempts to optimize in situ contaminant degradation by adding a growth substrate to saturated zone. CAS relies on the degradation of the primary growth substrate and cometabolic substrate transformation in the saturated zone and in the vadose zone for volatilized contaminants. In this study, we have investigated to determine MTBE degradation pattern and microbial activity variation if using propane as a primary substrate at the condition of considering air injection rate and air injection pattern. Laboratory-scale two-dimentional aquifer physical model studies were used and the experimental results were represented that the optimal conditions were as air injection rate of 1,000 mL/min and pulsed air injection pattern (15 min on/off). Over 1,000 mL/min air injection rate and continuous air injection pattern was no affected to increase DO concentration. On the other hand, Injection of propane and propane-utilizing bacteria degraded MTBE partially. And also, injection of propane- and MTBE-utilizing bacteria effectively degraded MTBE and TBA production was observed.

• 산업노동연구
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• 제23권2호
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• pp.141-167
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• 2017

본 연구는 작업장혁신 프로그램들의 고용효과에 관한 실증분석이다. 본 연구의 이론 모형과 가설은 혁신 일반의 고용효과에 관한 기존의 연구결과들을 발전시켜서 개발하였다. 사용 자료는 노사발전재단의 "일터혁신지수" 2013-14년 자료이다. 사용 자료는 횡단면 자료이고 통계모형은 OLS 모형이다. 본 회귀모형의 종속변수는 고용증가율이고 주된 독립변수는 작업장혁신 지수이다. 작업장혁신 지수는 TQM/6시그마, 제안제도, 다기능훈련 등을 합성하여 작성하였는데, 그 관행들의 도입 여부와 활용 정도(표준화값) 등 2 가지로 된 측정치들로 구성하였다. 분석 결과 작업장혁신 프로그램들의 도입 여부는 고용증가율에 통계적으로 유의한 영향을 미치지 못하고, 작업장혁신 프로그램들의 활용 정도는 고용증가율에 약하게 통계적으로 유의한 양(+)의 영향을 미치고 있었다. 이상의 분석 결과들은 작업장혁신의 도입이 고용에 통계적으로 유의한 영향을 미치지 못하고 있음을 말해주고 있는데, 그것의 활용도를 높일 경우에는 약한 수준에서나 고용에 긍정적인 영향을 미칠 가능성이 있음을 시사하고 있다. 그 밖에 정부 지원의 조직혁신 컨설팅을 받은 사업체(+), 임금수준(-), 1인당 훈련시간(+), 전년도 근로자수(-) 등이 고용증가율에 통계적으로 유의한 영향을 미치고 있다. 마지막으로 본 연구의 실증결과들을 요약하고, 연구의 한계와 향후 연구의 방향을 논의하였다.

• 벤처창업연구
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• 제10권3호
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• pp.75-83
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• 2015

본 연구에서는 중소기업 기술혁신개발사업에 참여한 중소기업 211개 기업을 대상으로 기업과 정부의 R&D투자, 정부R&D지원사업 참여경험이 기업의 고용증가율에 어떠한 영향을 미치는지를 실증적으로 분석하였다. 또한 기업의 R&D투자와 고용증가율간의 관계에서 정부 R&D투자규모와 정부R&D지원사업 참여경험이 조절역할을 하는지도 함께 분석하였다. 분석결과 기업의 R&D투자와 정부R&D투자규모는 고용증가율에 유의미한 영향을 미쳤으며 정부R&D투자는 기업의 R&D투자와 고용증가율간의 관계에서 조절효과를 나타냈다. 기업의 R&D 투자규모가 큰 기업과 작은 기업으로 나누어 정부R&D투자와 고용증가율간의 관계를 분석한 결과 기업의 R&D투자규모가 큰 기업군에서 정부R&D투자가 고용증가율에 유의미한 영향을 미치는 것으로 나타났다. 본 연구결과를 종합하면 중소기업에 대한 정부R&D투자는 고용창출효과를 나타내며 특히 혁신역량이 높은 중소기업에 대한 정부R&D투자가 고용창출에 대한 효과적인 역할을 한다고 설명할 수 있다. 그러므로 정부는 중소기업의 혁신역량에 따라 차별화된 R&D투자 전략을 통해 고용효과를 극대화할 수 있을 것이다.

• The Journal of Asian Finance, Economics and Business
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• 제9권10호
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• pp.39-48
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• 2022

This research aims to investigate the application of Keynes's theory in Indonesia, particularly in solving unemployment and poverty problems through government spending, economic growth, and human resource capacity. The basic concepts of the Keynesian theory were used as a method, through which government spending was harnessed toward economic growth in reducing unemployment and poverty rate. The analytical materials used were panel data for the 2017-2021 period in Central Java, Indonesia. The analytical methodology used was a multiple regression experimental design in selecting the best model according to Keynes's theory, especially for overcoming formidable problems. The main results showed that large Government spending program is ineffective in encouraging pro-growth, pro-job, pro-poor, and pro-equity development policy strategies. The causes of this failure include the violation of Keynes' assumptions about rationality and the low quality of education investment, which do not encourage productive and innovative entrepreneurship, as well as self-employment opportunities. As a result, government spending, including subsidies and direct financial assistance, used to implement the macroeconomic monetary, unstructured, and fiscal policy system is insufficient to significantly reduce the enormous difficulties. The main research results confirm that human capital capacity is the key to mitigating and reducing unemployment and poverty.

• 한국콘텐츠학회논문지
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• 제15권12호
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• pp.541-549
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• 2015

미국과 유럽 국가들에 대한 연구결과에 의하면, 순 고용을 창출하는 기업은 창업기업과 신생기업들이며, 실업률 감소와 경제 성장을 위해서는 창업기업의 수를 늘리고 창업기업의 생존율과 성장률을 높여주는 것이다. 자금조달은 창업과 신생기업 성장을 위해서 가장 중요한 요인이며, 특히 신생기업은 성장을 위한 자금조달능력에 따라 기업의 생존이 결정 될 수 있다. 주식형 크라우드 펀딩은 영업을 위한 효율적이고 혁신적인 자금조달 수단이며, 신생 기업이 온라인으로 수많은 대중들과 소통하게 하는 특성을 가지고 있기 때문에, 영업의 성공률과 성장률, 그리고 투자 수익성을 높여줌으로서 벤처캐피탈과 엔젤 투자가들의 투자를 유인하는 역할을 한다. 우리나라는 창업과 벤처기업의 생존율과 생존 기업들의 성장률이 미국과 다른 국가들의 신생기업 생존율과 성장률에 비하여 매우 낮은데, 그 원인은 창업 및 초기성장을 위한 자금 부족이 중요한 요인이 될 수 있다. 따라서 우리나라에서도 주식형 크라우드 펀딩이 벤처기업과 신생기업의 새로운 자금원이 되어 창업율과 창업기업의 생존율, 그리고 생존기업의 성장률을 증가시킴으로서 순고용 증가에 기여할 것이다. 우리나라는 2016년부터 주식형 크라우드 펀딩이 허용됨으로 고용창출에 미치는 확실한 효과는 향후 더 많은 연구가 필요한 분야일 것이다.

• 마이크로전자및패키징학회지
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• 제19권3호
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• pp.63-69
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• 2012

Adhesion and mechanical reliability of silicon/epoxy/polyimide interfaces are critical issues for flexible electronics. Bonds between these interfaces are mainly hydrogen bonds, so their adhesion is weaker than cohesive fracture toughness and vulnerable to moisture. In order to enhance adhesion and suppress moisture-assisted debonding, UV/Ozone treatment and innovative sol-gel derived hybrid layers were applied to silicon/epoxy/polyimide interfaces. The fracture energy and subcritical crack growth rate were measured by using a double cantilever beam (DCB) fracture mechanics test. Results showed that UV/Ozone treatment increased the adhesion, but was not effective for improving reliability against humidity. However, by applying sol-gel derived hybrid layers, adhesion increase as well as suppresion of moisture-assisted cracking were achieved.

• Geosystem Engineering
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• 제21권5호
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• pp.291-296
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• 2018

The aim of this work is to study the effect of aggregate type on the physico-mechanical properties and microstructure of bio-mortar (BM). Three different aggregates such as sand, dolomite and basalt were used. BM was prepared by mixing aggregates with bacterial cells (Sporosarcina Pasteurii) and one equimolar (1 M) of $urea/CaCl_2.2H_2O$. The results proved that the chemical composition and physical properties of aggregates play an important role in the microbial precipitation rate as well as size, morphology and crystallinity of the precipitated calcite, which strongly reflects on the properties of the prepared BM. The BM containing dolomite gave the highest compressive strength and lowest water absorption.

• 한국프랜차이즈경영연구
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• 제2권1호
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• pp.61-73
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• 2011

Supermarket Franchising, as a relatively new mode of retail business, is often regarded as one of the two hallmarks of the "Modern Logistics Revolution". After more than ten years of development, franchise supermarkets have been a rising force in retail business in China. As a product of a highly-developed commercial economy, franchise supermarkets mainly deals in foodstuffs and other daily necessities, featuring low cost, high turnover rate, low prices and diversified inventory. Propelled by the conveniences that come with open shelves and self-service shopping, franchise supermarkets have been growing very rapidly and the rise of many franchise supermarket brands bears testimony to its growth potential and profitability. Meanwhile, in the backdrop of this boom, some franchise supermarkets are going bankrupt. This paper analyzes the current status of franchise supermarkets and some factors bearing on their core competencies, so as to close the competitiveness gap with international retail giants.

• Journal of Microbiology and Biotechnology
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• 제30권8호
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• pp.1156-1168
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• 2020

Drought stress is threatening the growth and productivity of many economical crops. Therefore, it is necessary to establish innovative and efficient approaches for improving crop growth and productivity. Here we investigated the potentials of the cell-free extract of Actinobacteria (Ac) isolated from a semi-arid habitat (Al-Jouf region, Saudi Arabia) to recover the reduction in maize growth and improve the physiological stress tolerance induced by drought. Three Ac isolates were screened for production of secondary metabolites, antioxidant and antimicrobial activities. The isolate Ac3 revealed the highest levels of flavonoids, antioxidant and antimicrobial activities in addition to having abilities to produce siderophores and phytohormones. Based on seed germination experiment, the selected bioactive fraction of Ac3 cell-free extract (F2.7, containing mainly isoquercetin), increased the growth and photosynthesis rate under drought stress. Moreover, F2.7 application significantly alleviated drought stress-induced increases in H₂O₂, lipid peroxidation (MDA) and protein oxidation (protein carbonyls). It also increased total antioxidant power and molecular antioxidant levels (total ascorbate, glutathione and tocopherols). F2.7 improved the primary metabolism of stressed maize plants; for example, it increased in several individuals of soluble carbohydrates, organic acids, amino acids, and fatty acids. Interestingly, to reduce stress impact, F2.7 accumulated some compatible solutes including total soluble sugars, sucrose and proline. Hence, this comprehensive assessment recommends the potentials of actinobacterial cell-free extract as an alternative ecofriendly approach to improve crop growth and quality under water deficit conditions.

• 동력기계공학회지
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• 제21권3호
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• pp.85-92
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• 2017

Global air traffic is forecast to grow at an average annual rate of around 5% in the next 20 years. The continuous growth of air traffic and raised environmental awareness put increasing pressure on aero engine manufacturers to reduce fuel burn and emissions. NEWAC are a new integrated program of the European Union with focus on innovative core engine concepts to achieve this problem. In this paper, Within NEWAC, active core engine configurations will be investigated. the investigation is focused on the optimal design of the CAC heat exchanger for active core. For optimal design of he CAC heat exchanger, the HTFS of basic design of heat exchanger are analyzed so as to proceed an optimization routines based on Response Surface Method(RSM) and Design of Experiment(DOE). As a result, CAC heat exchanger optimized by 1.0314 lb/s mass flow rate and 3.9058 mm TP of tube layout and 206.8181 mm height of heat exchanger and 918 tube number for heat transfer and pressure drop. We confirm the design optimization using RSM and DOE is useful on complex structure of heat exchanger.