• Title/Summary/Keyword: Integrated Science

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지구의 연령 측정 관련 과학사 수업 개발 (Development of a History of Science Lesson Using the Content of 'Age Dating of the Earth')

  • 신동희;강혜진
    • 한국지구과학회지
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    • 제32권3호
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    • pp.324-333
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    • 2011
  • 과학 수업에 과학사를 도입하자는 주장은 과학 지식과 과학적 방법의 이해, 과학의 본성에 대한 고찰, 과학과 사회와의 상호작용의 이해 등의 필요성에 따라 지속적으로 강조되어 왔다. 통합 과학 교육의 중요성이 강조되고 있는 오늘날, 과학사는 통합 과학 교육의 방안으로도 효과적이다. 이러한 배경 속에서 본 연구에서는 과학사를 과학 교육에 활용한 연구들을 분석하고 이를 토대로 통합 과학 주제로서 과학사를 활용할 수 있는 내용을 선정해 과학사 수업을 개발했다. 본 연구에서는 통합 과학의 주제로서의 과학사 수업의 개발을 위해 '지구의 연령'을 주제로 선정했다. 중 고등학생들을 대상으로 한 시범 적용 결과, 학생들은 수업을 긍정적으로 평가했다.

Biodegradation of Ochratoxin A by Aspergillus tubingensis Isolated from Meju

  • Cho, Sung Min;Jeong, Seong Eun;Lee, Kyu Ri;Sudhani, Hemanth P.K.;Kim, Myunghee;Hong, Sung-Yong;Chung, Soo Hyun
    • Journal of Microbiology and Biotechnology
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    • 제26권10호
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    • pp.1687-1695
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    • 2016
  • Ochratoxin A (OTA), a mycotoxin, contaminates agricultural products and poses a serious threat to public health worldwide. Microbiological methods are known to be a promising approach for OTA biodegradation because physical and chemical methods have practical limitations. In the present study, a total of 130 fungal isolates obtained from 65 traditional Korean meju (a fermented starter for fermentation of soybeans) samples were examined for OTA-biodegradation activity using thin-layer chromatography. Two fungal isolates were selected for OTA-biodegradation activity and were identified as Aspergillus tubingensis M036 and M074 through sequence analysis of the beta-tubulin gene. After culturing both A. tubingensis isolates in Soytone-Czapek medium containing OTA (40 ng/ml), OTA-biodegradation activity was analyzed using high-performance liquid chromatography (HPLC). Both A. tubingensis strains degraded OTA by more than 95.0% after 14 days, and the HPLC analysis showed that the OTA biodegradation by the A. tubingensis strains led to the production of ochratoxin α, which is much less toxic than OTA. Moreover, crude enzymes from the cultures of A. tubingensis M036 and M074 led to OTA biodegradation of 97.5% and 91.3% at pH 5, and 80.3% and 75.3% at pH 7, respectively, in a buffer solution containing OTA (40 ng/ml) after 24 h. In addition, the OTA-biodegrading fungi did not exhibit OTA production activity. Our data suggest that A. tubingensis isolates and their enzymes have the potential for practical application to reduce levels of OTA in food and feed.

청소년을 위한 통합적 자살.폭력 예방 프로그램의 개발 (The Development of an Integrated Suicide.Violence Prevention Program for Adolescents)

  • 박현숙
    • 대한간호학회지
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    • 제38권4호
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    • pp.513-521
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    • 2008
  • Purpose: The purpose of this study was to develop an integrated suicide violence prevention program for adolescents. Another purpose was to evaluate the effects of the integrated suicide violence prevention program on self-esteem, parent-child communication, aggression, and suicidal ideation in adolescents. Methods: The study employed a quasi -experimental design. Participants for the study were high school students, 24 in the experimental group and 25 in the control group. Data was analyzed by using the SPSS/WIN. 11.5 program with $X^2$ test, t-test, and 2-way ANOVA. Results: Participants in the integrated suicide violence prevention program reported increased self-esteem scores, which was significantly different from those in the control group. Participants in the integrated suicide violence prevention program reported decreased aggression and suicidal ideation scores, which was significantly different from those in the control group. Conclusion: The integrated suicide violence prevention program was effective in improving self-esteem and decreasing aggression and suicidal ideation for adolescents. Therefore, this approach is recommended as the integrated suicide violence prevention strategy for adolescents.

과학기술 지식인프라 통합 아키텍처 설계방법론 (Design Methodology of Integrated Architecture for S&T Knowledge Infrastructure)

  • 강윤희;김영철
    • Journal of Platform Technology
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    • 제6권3호
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    • pp.31-37
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    • 2018
  • 최근 오픈 사이언스를 위한 플랫폼 개발이 국내외적으로 이루어지고 있으며, 과학기술 지식인프라의 데이터 처리 및 서비스 운영을 분석하여 과학기술 지식인프라의 성과확산을 위한 시스템 개발에 대한 요구가 증가하고 있다. 이 논문은 과학 기술 분야의 지식인프라를 위한 통합 아키텍처 설계 방법론을 도출하고 통합 아키텍처에서 데이터와 서비스의 통합수준 및 연계를 설정하는 그 방안을 제시한다. 연구 전과정에서 오픈 사이언스를 활용하기 위해서는 개별 서비스를 모듈 및 독립적인 기능 블록으로 구성하여 재사용 및 상호 운영될 수 있어야 한다. 이를 위해 제안된 설계 방법론은 과학기술 지식 인프라의 통합 서비스를 위한 서비스 통합을 다루기 위해 사용하며, 이는 다분야의 협력 참여연구자 및 엔지니어의 계산 수행 결과 및 산출물의 솔기없는 접근을 지원할 수 있다.

Evaluation of a Self-Adaptive Voltage Control Scheme for Low-Power FPGAs

  • Ishihara, Shota;Xia, Zhengfan;Hariyama, Masanori;Kameyama, Michitaka
    • JSTS:Journal of Semiconductor Technology and Science
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    • 제10권3호
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    • pp.165-175
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    • 2010
  • This paper presents a fine-grain supply-voltage-control scheme for low-power FPGAs. The proposed supply-voltage-control scheme detects the critical path in real time with small overheads by exploiting features of asynchronous architectures. In an FPGA based on the proposed supply-voltage-control scheme, logic blocks on the sub-critical path are autonomously switched to a lower supply voltage to reduce the power consumption without system performance degradation. Moreover, in order to reduce the overheads of level shifters used at the power domain interface, a look-up-table without level shifters is employed. Because of the small overheads of the proposed supply-voltage-control scheme and the power domain interface, the granularity size of the power domain in the proposed FPGA is as fine as a single four-input logic block. The proposed FPGA is fabricated using the e-Shuttle 65 nm CMOS process. Correct operation of the proposed FPGA on the test chip is confirmed.

Versatile Roles of Microbes and Small RNAs in Rice and Planthopper Interactions

  • Mansour, Abdelaziz;Mannaa, Mohamed;Hewedy, Omar;Ali, Mostafa G.;Jung, Hyejung;Seo, Young-Su
    • The Plant Pathology Journal
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    • 제38권5호
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    • pp.432-448
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    • 2022
  • Planthopper infestation in rice causes direct and indirect damage through feeding and viral transmission. Host microbes and small RNAs (sRNAs) play essential roles in regulating biological processes, such as metabolism, development, immunity, and stress responses in eukaryotic organisms, including plants and insects. Recently, advanced metagenomic approaches have facilitated investigations on microbial diversity and its function in insects and plants, highlighting the significance of microbiota in sustaining host life and regulating their interactions with the environment. Recent research has also suggested significant roles for sRNA-regulated genes during rice-planthopper interactions. The response and behavior of the rice plant to planthopper feeding are determined by changes in the host transcriptome, which might be regulated by sRNAs. In addition, the roles of microbial symbionts and sRNAs in the host response to viral infection are complex and involve defense-related changes in the host transcriptomic profile. This review reviews the structure and potential functions of microbes and sRNAs in rice and the associated planthopper species. In addition, the involvement of the microbiota and sRNAs in the rice-planthopper-virus interactions during planthopper infestation and viral infection are discussed.

The Impact of Corporate Governance on the Quality of Integrated Reporting: International Evidence

  • ELSHANDIDY, Tamer
    • The Journal of Asian Finance, Economics and Business
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    • 제9권6호
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    • pp.127-137
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    • 2022
  • This paper aims to investigate the impact of corporate governance on the quality of integrated reporting. Corporate governance includes internal (board size, board independence, and board diversity) and external (audit quality and enforcement) governance factors. This paper develops an index to capture the quality of integrated reporting by employing the completeness of information required by the International Integrated Reporting Council (IIRC). For an international sample, the paper manually collects 160 integrated reports along with internal and external governance factors and employs multivariate analyses to examine the association between these governance factors and the quality of integrated reporting. The empirical results suggest that firms with a larger board of directors, a larger proportion of female members on board, and located in countries with enforcement for integrated reporting requirements have a higher quality of integrated reporting. Our conclusions still hold after accounting for several conditions, including the industry-fixed and year-fixed effects. Together, these results suggest that both internal and external governance factors are important determinants for the quality of integrating reporting. These results have several theoretical and practical implications as they fulfill the absence of relevant studies on addressing the impact of internal and external corporate governance factors on the quality of integrated reporting.

An Analysis of Factors Affecting Intention of Farmers to Participate in Integrated Export Organizations

  • KIM, Dong-Hwan;CHUN, Chan-Ik
    • 산경연구논집
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    • 제14권1호
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    • pp.13-20
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    • 2023
  • Purpose: The integrated export organization for agricultural products is an export marketing organization established by joint participation of famers, farmer organizations, and exporters. The purpose of this study is to analyze the factors affecting the intention of farmers to participate in integrated export organizations. Research design, data and methodology: The multiple regression analysis was used to identify factors affecting intention of pear and mushroom farms to participate in the integrated export organizations. Results: It is shown that the lower farm age, the higher the need for consolidation of export companies, and the lower the government support for the integrated export organizations, the higher the willingness to participate in integrated export organizations. However, export experience, export scale, awareness level of integrated export organizations, and check price level did not significantly affect the intention to participate in integrated export organizations. Conclusions: It is desirable to promote export organizations of agricultural products among relatively young farmers and to reform their consciousness through emphasizing education for them. In addition, integrated export organizations should avoid disorderly competition by consolidating export companies. Lastly, governmental policies should be pursued in a direction that enables farmers and export companies to strengthen their competitiveness on their own.

Development of Integrated Orbit and Attitude Software-in-the-loop Simulator for Satellite Formation Flying

  • Park, Han-Earl;Park, Sang-Young;Park, Chandeok;Kim, Sung-Woo
    • Journal of Astronomy and Space Sciences
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    • 제30권1호
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    • pp.1-10
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    • 2013
  • An integrated orbit and attitude control algorithm for satellite formation flying was developed, and an integrated orbit and attitude software-in-the-loop (SIL) simulator was also developed to test and verify the integrated control algorithm. The integrated algorithm includes state-dependent Riccati equation (SDRE) control algorithm and PD feedback control algorithm as orbit and attitude controller respectively and configures the two algorithms with an integrating effect. The integrated SIL simulator largely comprises an orbit SIL simulator for orbit determination and control, and attitude SIL simulator for attitude determination and control. The two SIL simulators were designed considering the performance and characteristics of related hardware-in-the-loop (HIL) simulators and were combined into the integrated SIL simulator. To verify the developed integrated SIL simulator with the integrated control algorithm, an orbit simulation and integrated orbit and attitude simulation were performed for a formation reconfiguration scenario using the orbit SIL simulator and the integrated SIL simulator, respectively. Then, the two simulation results were compared and analyzed with each other. As a result, the user satellite in both simulations achieved successful formation reconfiguration, and the results of the integrated simulation were closer to those of actual satellite than the orbit simulation. The integrated orbit and attitude control algorithm verified in this study enables us to perform more realistic orbit control for satellite formation flying. In addition, the integrated orbit and attitude SIL simulator is able to provide the environment of easy test and verification not only for the existing diverse orbit or attitude control algorithms but also for integrated orbit and attitude control algorithms.

항공무기체계 LVC 시뮬레이션을 위한 통합연동시스템 V&V (V&V of Integrated Interoperability System for LVC Simulation on Aircraft Weapon System)

  • 오지현;장영찬;김천영;지철규;홍영석
    • 한국군사과학기술학회지
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    • 제18권3호
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    • pp.326-334
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    • 2015
  • This paper describes the verification and the validation about the development of the integrated interoperability system for live, virtual, and constructive simulations on the aircraft weapon system. The proposed integrated interoperability system provides the framework and application softwares for implementing a synthetic environment emulating real-world environment among distributed simulation models, which are a mission model and an air combat model of a constructive level, an tactical simulator of a virtual level, and simulated ACMI of a live level. In this paper, we verify requested functions through an developmental test and evaluation, and validate operability and usability through conducing integrated LVC scenarios on the integrated interoperability system.