• Bulletin of the Korean Chemical Society
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• v.17 no.11
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• pp.1065-1073
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• 1996

The dissociative recombination of O2+(v+)＋e-→O(1S)＋O(1D) has been theoretically investigated using the multichannel quantum defect theory (MQDT). Cross sections and rate coefficients at various electron energies are calculated. The resonant structures in cross section profile, which are hardly measurable in experiments, are also determined and the existence of Rydberg states is found to affect the rates. The theoretical rate coefficients are computed to be smaller than experimental ones. The reasons for this difference are explained. The two-step MQDT procedure is found to be very useful and promising in calculating the state-to-state rates of the dissociative recombination reaction which is a very important and frequently found phenomenon in Earth's ionosphere.

• Bulletin of the Korean Chemical Society
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• v.19 no.5
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• pp.539-544
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• 1998

A new theoretical method, named the SCF-DWB-IOS approximation, is suggested to investigate the vibrational predissociation of triatomic van der Waals complexes. The meta stable vibrational excited states are described with SCF (self-consistent-field) approximation and the fragmented diatomic continuum states are determined by using IOS (infinite order sudden) approximation. The dissociation process itself is studied by using DWB (distorted wave Born) approximation. As a test case, the predissociation rates, rotational state distributions of products, and the lifetimes of vibrationally excited states of $Ne-I_2$ are all computed which are in reasonable agreements with other theoretical and/or experimental results. The suggested SCF-DWB-IOS approximation scheme is found to be a very simple but efficient theoretical tool to investigate the vibrational predissociation dynamics of small van der Waals complexes.

• Food Science and Industry
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• v.52 no.2
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• pp.140-152
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• 2019

"Contained use" means using LMOs during manufacturing processes within a facility, equipment or other physical structures to prevent the spread of LMOs to the external environment. LMOs and their substances not only have played an essential role in various industries in different ways, but also have made to spread concerns in Biosafety widely. In Korea, the LMO Act is to implement the Cartagena Protocol on Biosafety' since 1st Jan 2008. This is focused on Biosafety and Risk management for LMOs according to the precautionary principle.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.1699-1701
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• 2013

최근 프로그래밍 교육이 새로운 방식의 사고력을 길러준다는 점에서 컴퓨터 공학 전공자뿐 아니라 일반인에게도 그 중요성이 강조되고 있다. 이러한 추세에 따라 프로그래밍 교육을 통해 길러지는 새로운 사고 과정인 computational thinking 관련 연구가 다양하게 시도되고 있다. 그러나 대부분의 연구가 특정 프로그래밍 언어에 의존적인 평가도구를 개발하여 측정하고 있으며 프로그래밍 경험 자체가 일상생활에서 일어나는 현상의 문제 해결을 위한 computational thinking에 영향을 주었는지를 연구한 결과는 아직 명확히 알려진 바가 없다. 따라서 본 연구는 프로그래밍 경험 유무에 따라 computational thinking에 차이가 있는가를 알아보았으며 그 결과 프로그래밍 경험이 있는 학생이 일상에서 일어나는 복잡한 문제를 더 논리적이고 상세하게 추상화하고, 구조화를 통해 더 명확한 모델링을 하였음을 알 수 있었다. 결론적으로 프로그래밍 경험 유무에 따라 computational thinking의 차이가 있음을 알 수 있었으며, computational thinking의 함양을 위해 프로그래밍 교육이 도움이 될 것으로 기대할 수 있다.

• Review of KIISC
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• v.31 no.4
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• pp.45-53
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• 2021

공통평가기준(CC, Common Criteria)의 국제 표준인 ISO/IEC 15408, ISO/IEC 18045는 정보보호제품에 구현되어 있는 보안 기능의 보증과 안전성을 시험하기 위한 평가 기준을 제시하는 국제 표준으로 정보보호제품에 대한 국제적인 신뢰성을 보장할 수 있도록 기준을 제시하고 있다. 특히 ISO/IEC 15408, ISO/IEC 18045는 ISO/IEC 27000, ISO/IEC 19790과 함께 ISO/IEC JTC 1/SC 27을 대표하는 국제 표준이다. 본 논문에서는 ISO/IEC JTC 1/SC 27/WG 3 작업반에서 개정을 진행하고 올해 말에 출판 예정인 ISO/IEC 15408 및 ISO/IEC 18405의 주요 변경 내용 및 신규 개념에 대해 설명하고, 최근 WG 3 작업반에서 추진하고 있는 국제 표준화 활동 현황 및 주요 현황을 소개하고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.04a
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• pp.901-904
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• 2011

SaaS 환경에서는 다수의 사용자가 동일한 어플리케이션을 이용하게 되므로 사용자에 따라 특정 자원 혹은 기능에 대한 접근을 제어하는 보안 기능의 중요성이 더욱 부각되고 있다. 이러한 기능을 갖춘 SaaS 플랫폼의 중요성과 그 가치는 매우 크다 할 수 있으나 국내에서는 이에 대한 많은 연구가 보이지 않고 있다. 본 논문에서는 계층적 그룹 구조, 접속 시간 IP 주소 MAC ID 등에 따른 역할 부여 등 풍부한 기능을 제공하는 SaaS 플랫폼을 위한 사용자 권한 관리 시스템을 설계한다.

• Analytical Science and Technology
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• v.19 no.6
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• pp.504-511
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• 2006

Polysilanes with organic substituents such as methyl and phenyl were synthesized by Wurtz dechlorination-condensation reactions using ultrasonic from organochlorosilanes. The yields were compared with the results of thermal dechlorination-condensation reactions. Properties such as thermogravimetric analysis and photoreactivity were investigated for the possibility of applications.

• Proceedings of the Korean Society of Crop Science Conference
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• 2021.10a
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• pp.188-188
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• 2021

• Clinical and Experimental Reproductive Medicine
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• v.34 no.3
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• pp.159-166
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• 2007

Objective: To investigate whether semen parameters in infertile couples who undergone intrauterine insemination (IUI) change in the subsequent IUI cycle and the subsequent in vitro fertilization (IVF) cycle. Methods: Fifty-three infertile couples who had failed to become pregnant after the first IUI cycle with computer-assisted semen analysis (CASA) were included. After the first IUI, thirty-eight couples underwent the second IUI (Group 1), and fifteen underwent IVF-ET procedure (Group 2). All semen parameters including semen volume, concentration, motility and total motile sperm count were analyzed in the second IUI or IVF-ET procedure for comparison with the result of first IUI. Results: There were no significant differences in husband age, interval between the first and second procedure and cause of infertility. In Group 1, only sperm motility at the time of the latter IUI was significantly decreased when compared to the former IUI irrespective of the first semen parameters. In Group 2, sperm concentration, motility and total motile sperm count at the time of subsequent IVF were lower than the former IUI. By sub-analyses of Group 2, in the group of optimal semen parameter at IUI cycle, sperm concentration and total motile sperm count at the time of subsequent IVF were lower than the former IUI, while in the group of suboptimal semen parameter at IUI cycle, only sperm motility at the time of subsequent IVF were lower than the former IUI. Conclusion: The semen parameters in couples converted to IVF cycle were more adversely affected than those remained in IUI cycle. Further study on psychological stress should be necessary to explain the reason.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.18 no.4
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• pp.131-148
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• 2023

The purpose of this study is to investigate the effects of entrepreneurial environment and entrepreneurial competency on entrepreneurial intention by setting degree of self-determination as a moderating variable for pre-entrepreneur of agriculture industry. The entrepreneurial environment was divided into perceived support and perceived barriers, and the sub-variables of entrepreneurial competence were set as creativity, problem solving, communication, marketing, and business plan. 253 questionnaires were used for empirical analysis. The results of the analysis using SPSS v25.0 and Process macro v4.2 are as follows. First, the perceived support and perceived barriers of the entrepreneurial environment have a significant effect on entrepreneurial intention. Creativity, problem solving, marketing and business plan of entrepreneurial competency have a significant effect on entrepreneurial intention, but the effect of communication was non-significant. Second, the degree of self-determination did not moderate the relationship between perceived support, barriers and entrepreneurial intention. This means that the level of self-determination may not have a significant effect on the relationship between entrepreneurial environment and entrepreneurial intention. Third, the degree of self-determination was found to moderate the relationship between creativity, problem solving, communication, marketing and business plan of entrepreneurial competency and entrepreneurial intention. Specifically, as the degree of self-determination increases, the size of the influence of creativity, problem solving, marketing, and business plan on entrepreneurial intention plays a role of strengthening in a positive direction. On the other hand, as the degree of self-determination increases, the degree of self-determination, which weakens the relationship between communication and entrepreneurial intention. Future research will require exploration of other factors that can explain entrepreneurial environment and entrepreneurial capacity, and follow-up studies are needed to analyze the moderated mediating effects through conditional process models that include new mediating and moderating variables.