• Bulletin of the Korean Chemical Society
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• 제11권4호
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• pp.343-347
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• 1990

A thermal decomposition of the tert-butoxy radical has been studied in the gas phase over the pressure range of 1-200 torr at $413_{\circ}K$ using di-tert-butyl peroxide + trimethylsilane mixtures. The relative rate constants were obtained by studying the competitive reactions between tert-butoxy radical decomposition 4(t-BuO·→ CH_3COCH_3 + CH_3·)$ and hydrogen abstraction reaction from trimethylsilane $(t-BuO·+ HSi(CH_3)_3 → t-BuOH + Si(CH_3)_3)·).$ The conventional RRKM calculations were carried out to compare the observed fall-off behavior of the decomposition rate constant $({\kappa}_d)$ with the theoretical predictions using reasonable values of input parameters. In all cases the calculated half-rate pressure $(P_{1/2})$ were significantly higher than those observed. The failure of RRKM to reproduce the fall-off behavior led us to suggest that not all of vibrational modes contribute to excitation (leading to decomposition) on the same time scale.

• 대한산업공학회지
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• 제4권2호
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• pp.67-75
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• 1978

This paper attempts to identify the factors which are directly related to the effective transfer of technology from developed countries to LDCs. The recipient countries should have the capability of alteration/adaptation based on cost-minimization criteria. Some problems are such that technologies are transferred on the conditions of MNFs, packaged forms and under state management which result in lack of competitive pressure. Non-technological criteria are shown to be a problem under state management in the transaction of technology.

• 분석과학
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• 제8권4호
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• pp.1075-1078
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• 1995

This paper describes how industry has responded to the environmental challenge. Benefits include compliance with environmental legislation; genuine reductions to environmental impact; sustainable improvements to profitability in the face of increased competitive pressure. National and international Standards for environmental management offer security and direction for a company wishing to improve environmental performance and coupled with a waste minimisation strategy many financial and environmental benefits can be achieved. Introduction of new technical skills, techniques and worker understanding to aid motivation is an essential component of such a strategy. Monitoring and targeting has a key role to play in the establishment of improved environmental performance.

• 한국CDE학회논문집
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• 제12권3호
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• pp.182-192
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• 2007

The reduction of product development time is exposed to the competitive pressure due to shortened product-and production technology lifecycles as well as increasingly dynamic markets. Specially in automobile companies, that is of major importance for designing die because it is a bottleneck process in the development of a new car. To improve this conventional design process, this paper describes how to design it fast and flexibly. This was done by a modular method using standard template and a feature and knowledge based design method along the design process.

• 멤브레인
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• 제4권1호
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• pp.1-8
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• 1994

There are growing needs to produce relatively high purity(99.0% or higher) oxygen at low cost. For small scale production, both pressure swing adsorption(PSA) and membrane process are competitive and less expensive or more convenient than well known cryogenic fractionation technology. A continuous membrane column(CMC) combined with a PSA oxygen generator can be employed to produce high purity oxygen continuously. The oxygen enriched gas generated by a PSA unit, with a concentration of 93~94%, is fed to the CMC that consism of three modules of poly(imide) hollow fibers. Several experiments were conducted by varying parameters, such as feed flow rate, transmembrane pressure drop, stage cut, and feed location in order to obtain a high oxygen concentration above 99.0%. A two-series unit mode was also employed with CMC operation to optimize the given membrane area.

• 스마트미디어저널
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• 제5권4호
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• pp.111-115
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• 2016

Intelligent robots are being introduced and utilized to create new values in diverse fields such as medical care, national defense, education, and manufacturing. However, while the technical aspects of intelligent robots are spreading, the business side is lacking in recognition. The purpose of this study is to identify the factors affecting product innovation through the introduction of intelligent robots in enterprises. Among the six variables secured from the technology, organization, and environment framework, only perceived direct usefulness and competitive pressure have significant effects on product innovation. The results imply that the effects of introducing robots are still in their early stage from a business perspective.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2009년도 춘계학술대회 논문집
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• pp.145-147
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• 2009

The benefits of hydroforming technology are known as weight and cost savings through part consolidation and reduced post-forming processes such as welding and piercing. Hydroforming technology has some weaknesses in terms of process cycle times. But, as the hydraulic system and process designs are continuously developed, the cycle time is also reduced to acceptable and competitive levels. Hot air bulging is one of recently developed hydroforming techniques. Hot air bulging in order to further extend the forming degrees of Al lightweight material is investigated. A heated tube is placed in a heated die and sealed at the ends by sealing cylinders. The tube is subsequently expanded against the die cavity wall by internal pressure provided by air medium. The result of this study shows that axial feeding speed and air pressure have an effect on formability of Al air bulging at elevated temperature.

• International journal of advanced smart convergence
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• 제4권2호
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• pp.54-60
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• 2015

In modern business organization, the most important strategic factor in maintaining competitive advantage in business is to manage and utilize human resources effectively, which has eventually increased workload and psychological pressure in organizations. And research show that increased workload and psychological pressure has produced various tensions in business organizations, and it appears that those tensions have increased the workplace aggressive behavior among employees. In various types of aggressive behavior, this study focuses on verbal aggression. The study also attempts to find out the relationships among verbal aggression, job involvement, and turnover intention among administrative workers in colleges from May 20 to May 26, 2015. Summary of the research result is as follows. First of all, the study shows that verbal aggression directly increases the employee turnover intention.

• 한국표면공학회지
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• 제48권3호
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• pp.126-130
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• 2015

A high-pressure depletion method using plasma chemical vapor deposition (CVD) is often used to deposit hydrogenated microcrystalline silicon (${\mu}c-Si:H$) films of a low defect density at a high deposition rate. To understand proper deposition conditions of ${\mu}c-Si:H$ films for a high-pressure depletion method, Si films were deposited in a combinatorial way using a multi-hollow discharge plasma CVD method. In this paper the substrate temperature dependence of ${\mu}c-Si:H$ film properties are demonstrated. The higher substrate temperature brings about the higher deposition rate, and the process window of device quality ${\mu}c-Si:H$ films becomes wider until $200^{\circ}C$. This is attributed to competitive reactions between Si etching by H atoms and Si deposition.

• 대한가정학회지
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• 제38권8호
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• pp.69-84
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• 2000

This study intended to investigate the relationship between father's/mother's values(materialism, competitive achievement pressure, neighborhood relations), father/mother-student emotional intimacy & father's/mother's over control and university student's alienation, and examin the relative influences of independent variables on university student's alienation. For this purpose, data were obtained from 402 male 7nd female university students in Seoul and Inchon, and analyzed by factor analysis, Cronbach's $\alpha$, frequencies, %, Pearson's r and stepwise multiple regression. The major findings were as follows : 1) father's and mother's values had significant relations to university student's alienation. As father and mother had more materialism and competitive achievement pressure, their university student was more alienated, and as father and mother had more neighborhood relations, the student was less alienated. 2) Emotional intimacy between father/mother and student had negative relation to university student's alienation. As the level of emotional intimacy was higher, the student was less alienated 3) Father's and mother's over control had positive relations to university student's alienation. As father's and mother's over control was higher, the student was more alienated. 4) Mother's neighborhood relations, father's and mother's over control, mother-student emotional intimacy and father's materialism had influences on university student's alienation in descending order. These independent variables explained 25. 0 % of the total valiance. Father's materialism and father's/mother's over control increased the level of university student's alienation, but mother's neighborhood relations and mother-student emotional intimacy decreased the bevel of student's alienation. Emerging evidences suggested that in order to prevent or decrease the university student's alienation, their parents should have less materialism and more neighborhood relations, and should not use over control on their university student but produce more emotional support.