• 공학교육연구
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• 제11권3호
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• pp.70-77
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• 2008

이 연구는 친환경 개념에 대한 건축공학 대학생의 친숙함과 흥미의 정도, 태도, 그리고 친환경 개념에 대한 학생들의 태도를 향상시키기 위한 요인들을 조사하고 있다. 연구의 목적을 이루기 위해, 이 연구는 저자들에 의해 개발된 설문 조사 방법을 채택하고 있다. 이는 미국 버지니아주 버지니아 공대의 건축공학과 학생들을 대상으로 하는 설문조사를 기반으로 한 기술/상관 연구이다. SPSS를 이용한 기술통계와 다중회귀분석을 통하여 다음과 같은 결과를 제시하고 있다. 첫째, 건축공학 전공 학생들은 대체로 친환경 건축에 대한 높은 친밀감과 흥미를 가지고 있다. 둘째, 친환경 개념에 대한 건축공학 전공 학생들의 태도는 친환경 건축 수업, 친환경 관련 수업과 연구를 담당하는 교수진, 친환경적인 학생들의 학습환경 또는 시설들, 그리고 친환경 건설 관련 학교 행사와 실천과 같은 요인들에 기반해 달라지는 것으로 나타났다. 마지막으로, 친환경 개념에 대한 건축공학 학생들의 태도는 특히, 건축공학 프로그램에서 친환경 건축관련 수업을 제공함으로 향상될 수 있다.

• Journal of Veterinary Science
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• 제22권5호
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• pp.59.1-59.13
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• 2021

Background: Antimicrobial peptides (AMPs) have been identified as promising compounds for consideration as novel antimicrobial agents. Objectives: This study analyzed the efficacy of cecropin B against Haemophilus parasuis isolates through scanning electron microscopy (SEM) and atomic force microscopy (AFM) experiments. Results: Cecropin B exhibited broad inhibition activity against 15 standard Haemophilus parasuis (HPS) strains and 5 of the clinical isolates had minimum inhibition concentrations (MICs) ranging from 2 to 16 ㎍/mL. Microelectrophoresis and hexadecane adsorption assays indicated that the more hydrophobic and the higher the isoelectric point (IEP) of the strain, the more sensitive it was to cecropin B. Through SEM, multiple blisters of various shapes and dents on the cell surface were observed. Protrusions and leakage were detected by AFM. Conclusions: Based on the results, cecropin B could inhibit HPS via a pore-forming mechanism by interacting with the cytoplasmic membrane of bacteria. Moreover, as cecropin B concentration increased, the bacteria membrane was more seriously damaged. Thus, cecropin B could be developed as an effective anti-HPS agent for use in clinical applications.

• Nutrition Research and Practice
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• 제8권5호
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• pp.487-493
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• 2014

BACKGROUND/OBJECTIVES: D. candidum is a traditional Chinese food or medicine widely used in Asia. There has been little research into the anticancer effects of D. candidum, particularly the effects in colon cancer cells. The aim of this study was to investigate the anticancer effects of D. candidum in vitro and in vivo. MATERIALS/METHODS: The in vitro anti-cancer effects on HCT-116 colon cancer cells and in vivo anti-metastatic effects of DCME (Dendrobium canidum methanolic extract) were examined using the experimental methods of MTT assay, DAPI staining, flow cytometry analysis, RT-PCR, and Western blot analysis. RESULTS: At a concentration of 1.0 mg/mL, DCME inhibited the growth of HCT-116 cells by 84%, which was higher than at concentrations of 0.5 and 0.25 mg/mL. Chromatin condensation and formation of apoptotic bodies were observed in cancer cells cultured with DCME as well. In addition, DCME induced significant apoptosis in cancer cells by upregulation of Bax, caspase 9, and caspase 3, and downregulation of Bcl-2. Expression of genes commonly associated with inflammation, NF-${\kappa}B$, iNOS, and COX-2, was significantly downregulated by DCME. DCME also exerted an anti-metastasis effect on cancer cells as demonstrated by decreased expression of MMP genes and increased expression of TIMPs, which was confirmed by the inhibition of induced tumor metastasis in colon 26-M3.1 cells in BALB/c mice. CONCLUSIONS: Our results demonstrated that D. candidum had a potent in vitro anti-cancer effect, induced apoptosis, exhibited anti-inflammatory activities, and exerted in vivo anti-metastatic effects.

• 공학교육연구
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• 제13권1호
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• pp.70-77
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• 2010

본 연구는 학생포트폴리오 작성 경험을 분석함으로써 학생포트폴리오의 교육적 가치 및 작성지도의 방향을 제시하고자 한다. 연구의 목적을 달성하기 위해 질적연구를 수행하였는데, 포트폴리오에 대한 문헌연구를 토대로 인터뷰 문항을 구성하고 인천광역시 소재 I 대학의 학생 9명을 대상으로 인터뷰를 실시하였다. 인터뷰에 응한 학생들은 교내 학생포트폴리오 경진대회의 수상자 11명 중 일부로써 인터뷰 전 과정을 녹취하고 이를 전사하여 분석하였다. 인터뷰 결과 대부분의 학생들은 공학교육인증 평가를 위해 타의적으로 학생포트폴리오 작성을 시작하였으나 학생포트폴리오 작성이 필요하며 저학년 때부터 작성하는 것이 바람직하다고 인식하였다. 학생포트폴리오 작성시의 어려움으로는 자료 관리의 미비로 자료의 부족을 손꼽았으며 포트폴리오 자체에 대한 인식이 낮아 표준 양식을 제공해 준다고 하더라도 어떻게 작성해야 할지 어려워하고 있었다. 학생들은 학생포트폴리오를 작성함으로써 자기 반성의 기회를 갖고 기록의 중요성을 인식하며, 미래에 대한 준비를 할 수 있는 기회를 갖게 되었다. 이러한 과정을 통해 학생들은 또 다른 활동이나 능력 향상을 위한 동기가 생겨나고 자신감을 획득하게 되며, 꾸준한 포트폴리오 작성 과정으로 인해 문서작성 능력의 향상을 인식하게 되는 등 다양한 긍정적인 효과를 경험할 수 있었다.

• 한국화재소방학회논문지
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• 제33권5호
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• pp.103-108
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• 2019

본 연구의 목적은 국내 소방 전문학술지에 게재된 선행연구 분석을 통해 소방분야 연구편중 정도를 분석하고, 화재 인명피해 저감 정책 이슈 및 4차 산업혁명시대 기술 환경 변화를 반영한 소방안전 발전방향을 제시하는 것이다. 이를 위해 한국화재소방학회지 연구분류체계, 국가화재안전기준, 한국소방산업기술원 연구개발사업 분류체계, 4차 산업혁명 핵심분야, 인간행동과학 응용 분야 등을 기준으로 소방연구분야 체계를 정립한 후, 한국화재소방학회 논문지에 게재된 최근 10년간의 논문 929건을 소방연구분야 체계별로 분류하고 빈도분석을 하였다. 분석결과 화재화학·물리, 감지 및 소화시스템, 화재안전설계 및 관리, 피난 및 인간행동분야 순으로 많이 연구가 된 것을 확인하였다. 감지 및 소화시스템에 대한 연구는 주로 소화설비, 경보설비, 제연설비가 많이 연구되었으며, 화재의 주요 원인이 되는 인간의 행동부주의를 줄일 수 있는 소방교육, 훈련에 대한 연구가 매우 미흡하다는 것을 확인하였다. 아울러 최근 진행되고 있는 4차 산업기술과의 융합연구도 매우 드물다는 것도 확인되었다. 결론에서는 사람의 행동부주의를 개선할 수 있는 교육과 훈련분야의 연구필요성 등을 논의하고, 향후 연구의 발전방향을 제시하였다.

• 국제초고층학회논문집
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• 제7권4호
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• pp.265-285
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• 2018

This paper presents a state-of-the-art review on the design, research and education aspects of fire safety engineering (FSE) with a particular concern on high-rise buildings. FSE finds its root after Great Fire of Rome in 64 AD, followed by Great London Fire in 1666. The development of modern FSE is continuously driven by industry revolution, insurance community and government regulations. Now FSE has become a unique engineering discipline and is moving towards performance-based design since 1990s. The performance-based fire safety design (PBFSD) involves identification of fire safety goals, design objectives, establishment of performance criteria, and selection of proper solutions for fire safety. The determination of fire scenarios and design fires have now become major contents for PBFSD. To experience a rapid and positive evolution in design and research consistent with other engineering disciplines, it is important for fire safety engineering as a profession to set up a special educational system to deliver the next-generation fire safety engineers. High-rise buildings have their unique fire safety issues such as rapid fire and smoke spread, extended evacuation time, longer fire duration, mixed occupancies, etc., bringing more difficulties in ensuring life safety and protection of property and environment. A list of recommendations is proposed to improve the fire safety of high-rise buildings. In addition, some source information for specific knowledge and information on FSE is provided in Appendix.

• 한국화재소방학회논문지
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• 제20권3호
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• pp.54-64
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• 2006

정보통신기술(IT)의 급속한 발전은 공직사회 전반에 새로운 변화를 요구하고 있으며, 정부도 정보기술을 토대로 공공부문의 생산성과 효율성을 진작시키기 위해 부단히 노력하고 있다. 본 연구의 목적은 전자결재시스템의 운영에 관한 사항을 평가하고, 운영상 나타난 문제점을 바탕으로 효과적인 활용 방안을 제시하는 데 있다. 연구의 결과를 통해 효율적인 전자결재시스템의 활용을 위해 체계적인 교육, 결재업무절차의 개선, 시스템 안정, 시스템 처리속도 개선, 기관별 시스템 연계 등을 제시하였다.

• 한국건설관리학회논문집
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• 제6권6호
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• pp.193-204
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• 2005

Conflict is aroused when different people having different interest work together for fulfilling same the objectives. As the construction field is large, complex, volatile and requires tremendous capital, there are always greater challenges and possibility of risks of conflicts. Poor management practices in construction site and trying to protect risks and threats by contracting parties are the cited sources of the construction conflicts. The best management practice is to resolve the problems before these cultivate as conflicts. This paper has identified six dispute avoidance factors-Convince, Coordination, Consideration, Compromise, Consolation and Coercion. Six 'C' factors described in this paper are the mantra (formula) to execute a conflict free construction project. The conflict avoidance factors have been verified through a successfully executed project called TEVT development project (Technical Education and Vocational Training) during 1993-1998 in Nepal. The results show that the six 'C' factors 'C' considered during the implementation of the project, construction conflicts would be controlled or minimized effectively.

• International Journal of Computer Science & Network Security
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• 제21권2호
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• pp.212-220
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• 2021

The objectives of this research were to identify the digital competencies required for information science specialists at Saudi universities and to examine whether there existed conspicuous differences in the standpoint of these specialists due to years of work experience with regard to the importance of these competencies. A descriptive analytical method was used to accomplish these objectives while extracting the required digital competency list and ascertaining its importance. The research sample comprised 24 experts in the field of information science from several universities in the Kingdom of Saudi Arabia. The participants in the sample were asked to complete a questionnaire prepared to acquire the pertinent data in the period between January 5, 2021 and January 20, 2021. The results reveal that the digital competencies required for information science specialists at Saudi universities encompass general features such as the ability to use computer, Internet, Web2, Web3, and smartphone applications, digital learning resource development, data processing (big data) and its sharing via the Internet, system analysis, dealing with multiple electronic indexing applications and learning management systems and its features, using electronic bibliographic control tools, artificial intelligence tools, cybersecurity system maintenance, ability to comprehend and use different programming languages, simulation, and augmented reality applications, and knowledge and skills for 3D printing. Furthermore, no statistically significant differences were observed between the mean ranks of scores of specialists with less than 10 years of practical experience and those with practical experience of 10 years or more with regard to conferring importance to digital competencies.

• Nuclear Engineering and Technology
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• 제47권5호
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• pp.534-545
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• 2015

In the very high temperature reactor (VHTR), which is a next generation nuclear reactor system, ceramics are used as a fuel coating material and graphite is used as a core structural material. Even if a depressurization accident occurs and the reactor power goes up instantly, the temperature of the core will change only slowly. This is because the thermal capacity of the core is so high. Therefore, the VHTR system can passively remove the decay heat of the core by natural convection and radiation from the surface of the reactor pressure vessel. The objectives of this study are to investigate the heat transfer characteristics of natural convection of a one-side heated vertical channel with inserted porous materials of high porosity and also to develop the passive cooling system for the VHTR. An experiment was carried out using a one-side heated vertical rectangular channel. To obtain the heat transfer and fluid flow characteristics of the vertical channel with inserted porous material, we have also carried out a numerical analysis using a commercial Computational Fluid Dynamics (CFD) code. This paper describes the thermal performances of the one-side heated vertical rectangular channel with an inserted copper wire of high porosity.