• Journal of the Korea Society for Simulation
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• v.28 no.2
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• pp.97-105
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• 2019

The tactical mobile ad-hoc network(MANET) consists of distributed autonomous networks between individual ground nodes, which is effective in terms of network survivability and flexibility. However, due to constraints such as limited power, terrain, and mobility, frequent link disconnection and shadow area may occur in communication. On the other hand, the satellite network has the advantage of providing a wide-area wireless link overcoming terrain and mobility, but has limited bandwidth and high-latency characteristic. In the future battlefield, an integrated network architecture for interworking multi-layer networks through a heterogeneous network gateway (HNG) is required to overcome the limitations of the existing individual networks and increase reliability and efficiency of communication. In this paper, we propose a new HNG architecture and detailed algorithm that integrates satellite network and the tactical MANET and enables reliable data transfer based on flow characteristics of traffic. The simulations validated the proposed architecture using Riverbed Modeler, a network-level simulator.

• Journal of agriculture & life science
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• v.53 no.6
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• pp.35-44
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• 2019

The objectives of this study were to identify engineering problems in the design and installation of cable logging operation that affects productivity through case study of actual logging sites, and to analyze associated productivity loss and increased cost. As a result of the study, when the geographic conditions and engineering safety of the site are not sufficiently considered, deflection of the cable line can not be secured. Hourly productivity of the operation decreased to 65% and the logging cost increased by more than two times compared to the productive yarding operation, which lowered overall efficiency of the operation. Thus, it is required to spread filed technologies that minimize unnecessary production cost incurred due to the in-efficient logging operations as well as secure work safety and efficiency to expand cable logging operation throughout the country.

• Journal of Gifted/Talented Education
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• v.11 no.3
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• pp.85-97
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• 2001

This study was to gain a suggestion how to educate the science gifted student and manage the science gifted education center by analyzing the science gifted student's perception of the science, scientist and vocation. One seventy and eight science gifted students were involved in the questionnaire to investigating the perception of science, scientist and vocation. As the results, many of science gifted students thought the convenience as the positive aspect of science and the environmental pollution as the negative aspect of science. Science gifted students considered most scientists a diligent person, researcher and what's more, they are careless about home. They suggested much more of foreign scientists like Einstein, Edison, etc. than Korean ones as respectable scientists. Scientist is a major vocation that they want and know in the science area, while some students want to be a doctor, occurred to science singer. The mystery, difficulty, complexity, scientist, etc. occurred to science gifted students when they heard the ‘science’. According to the results, there are in need of the new educational programs for the science gifted students and science gifted education center. One of the aims of the science gifted education center is the judgment and cultivation of the science gifted student. Therefore, the science gifted student to be educated to improve positively the images of science and scientist. In addition to, they should get a concern about the vocation in science area and to be a famous scientist.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.12 no.2
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• pp.111-122
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• 2002

Malicious attackers generally attempt to intrude the target systems by taking advantage of existing system vulnerabilities and executing readily available code designed to exploit blown vulnerabilities. To the network security administrators, the rat and minimal step in providing adequate network security is to identify existing system vulnerabilities and patch them as soon as possible. Network-based vulnerability analysis scanners (NVAS), although widely used by network security engineers, have shortcomings in that they depend on limited information that is available and generally do not have access to hast-specific information. Host-based vulnerability analysis scanner (HVAS) can serve as an effective complement to NVAS. However, implementations of HVAS differ from one platform to another and from one version to another. Therefore, to security engineers who often have to maintain a large number of heterogeneous network of hosts, it is impractical to develop and manage a large number of HVAS. In this paper, we propose an agent-based architecture named ISMAEL and describe its prototype implementation. Manager process provides various agent processes with descriptiom on vulnerabilities to check, and an agent process automatically generates, compiles, and executes an Java code to determine if the target system is vulnerable or not. The result is sent back to the manager process, and data exchange occurs in % format. Such architecture provides maximal portability when managing a group of heterogeneous hosts and vulnerability database needs to be kept current because the manager process need not be modified, and much of agent process remains unchanged. We have applied the prototype implementation of ISMAEL and found it to be effective.

• Journal of The Korean Association For Science Education
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• v.37 no.6
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• pp.981-992
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• 2017

This research compares the subjects of "Integrated Science" and "Converged Science" in the 2015 Revised National Curriculum, through core concepts. The content priorities and levels of integration of each core concept were evaluated through an analytical framework, and visualized using two-dimensional visualization matrix of the content priorities and the levels of integration. The results show that "Integrated Science" had fewer core concepts, higher in priorities and slightly lower levels of integration than "Converged Science". This can be an evidence that "Integrated Science" is excellent in rigor and not so much inferior in relevance. And also, through visualization of analysis results, the characteristics of integrated subjects could easily be understood and compared.

• The Journal of the Korea institute of electronic communication sciences
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• v.16 no.1
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• pp.165-174
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• 2021

The purpose of this study is to compare the differences in national R&D research outcomes in science and technology according to gender. For this purpose, the analysis was conducted by mapping WoS SCI(E) papers from 1990to 2018 and NTIS R&D papers from 2007 t0 2016. As a result of examining the differences in research achievements in science and technology according to gender based on three bibliometic indicators - average Times cited, Time-lag, and Impact factor - we found that the overall topography of research achievement was still male-centered, and the differences in the main research area between male and female were also very prominent. On the other hand, in top 10 research areas, it was confirmed that female researchers' outcomes were higher in the number of Times cited and Impact factor.

• Journal of the Korean Chemical Society
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• v.66 no.1
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• pp.50-60
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• 2022

The purpose of this study is to explore the Nature of Argumentation in Science education (NAS). For this purpose, we collected previous studies conducted on the argumentation in science education, and then collected previous studies were analyzed to extract the overall characteristics of argumentation in science education. Based on the results, an expert review was conducted, then the nature of argumentation in science education was finally derived to a total of seven components: 'evidence based', 'linguistic interaction', 'context dependency', 'public decision-making', 'tentative agreement', 'methodological diversity', and 'enculturation of scientific culture'. Understanding the nature of argumentation in science education can promote the practice of argumentation in science learning. Therefore, further studies will be necessary to conduct research to expand and refine the nature of argumentation in science education in order to effectively practice it in science learning.

• Journal of the Korea Institute of Military Science and Technology
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• v.26 no.4
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• pp.335-343
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• 2023

Drone based Magnetic Anomaly Detection measure a magnetic anomaly signal from the ferromagnetic target on the ground. We conduct a magnetic anomaly detection with 9 ferromagnetic targets on the ground. By removing the magnetic field measured in the absence of ferromagnetic targets from the experimental value, the magnetic anomaly signal is clearly measured at an altitude of 100 m. We analyze the signal characteristics by the ferromagnetic target through simulation using COMSOL multiphysics. The simulation results are within the GPS error range of the experimental results.

• Proceedings of the Korean Society for the Gifted Conference
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• 2003.11a
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• pp.167-169
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• 2003

과학영재 교육의 목적과 효과를 달성하기 위해서는 과학영재들의 특성, 과학영재의 판별이나 교육 프로그램의 개발, 과학영재들의 과학, 과학자, 과학관련 직업에 대한 인식 등 여러 요소들에 초점을 맞추어 연구해야 하며 이를 바탕으로 교육해야 한다. 과학영재교육의 중요한 점 중 하나는 우리가 교육하는 과학영재들이 성장해서 그들의 영재성을 발휘하도록 하는 것에 있다. 이는 국가적으로도 매우 중요한 일이다. 과학기술의 발달과 국가의 발전은 뛰어난 영재들이 기여를 하였으며 그 업적을 통해 국제경쟁 사회를 선도해 나갈 수 있기 때문이다. 과학영재 교육의 성공 기준 중 하나로 노벨상 수상을 기대하는 것이라고 생각할 수 있다. 물론 노벨상만을 목표로 하는 것은 과학영재교육이 왜곡될 수 있으나, 과학영재교육을 통해서 과학 분야에 뛰어난 인재를 양성하고 이들로부터 과학의 수준이 높아지면서 자연스럽게 노벨상을 수상할 수 있을 것이다. 2002년 노벨 과학상에서 일본은 물리학과 화학 두 분야에서 수상자를 배출하였다. 특히 노벨 화학상을 받은 다나카 고이치는 박사학위도 없는 40대의 평범한 회사원이었다. 그는 일본 과학계를 장악하고 있는 유명 국립대학의 교수도 아니고, 수상 발표 뒤 대부분의 일본 화학자들이 누군지 몰라 당황했을 정도로 잘 알려지지 않은 인물이었다. 이러한 사건은 일본인들에게 희망을 안겨주었으며 과학 및 과학자에 대한 관심과 투자에 대한 인식에 있어 많은 변화를 초래하였다. 노벨상 자체가 국가정책의 목표가 될 수는 없지만, 과학자나 국민 개개인들에게 희망이 되는 것은 사실이다. 해마다 노벨상 수상자가 발표되는 시점에서 우리들은 아주 오랫동안 방관자가 되어 왔다. 이제 여러 과학영재교육기관 등을 통해서 과학영재 교육을 효율적으로 실시한다면 조만간 상황이 바뀔 것으로 기대할 수 있다.택한 이유는 첫 번째가 사회 봉사와 국가 발전에 기여하기 위한 것이었으며, 다음으로는 생활의 안정을 꼽고 있었다. 이외에도 과학적 업적 달성을 위해, 자신의 꿈(이상) 실현을 위해 등의 이유를 들고 있었다. 이러한 경향은 남자 영재와 여자 영재들간에 다소 차이는 있었으나 거의 유사한 것으로 조사되었다(Pearson $X^2$=2.186, p>0.05). 우수한 능력을 소유한 영재들이 과학관련 분야를 선호하지 않는다면 우리나라의 과학 발전은 그리 낙관할 수 없을 것이다. 그러므로, 영재들을 과학 관련 분야로 이끌어 그들이 소유한 영재성을 발휘하도록 하는 것은 매우 중요한 일일 것이다. 이룰 위해서는 과학 영재들이 자신의 능력에 대한 자신감을 더욱 높여야 하며 그 능력을 과학관련 분야에 발휘하도록 하기 위한 국가적, 사회적, 교육적 노력이 필요하다. 노력이 필요하다.~42.1mg$CO_2$/kg.hr였으며 12$^{\circ}C$에서 2.5~8.2mg$CO_2$/kg.hr로 일반적으로 보고되고 있는 토마토 호흡속도와 일치하는 결과를 나타내었다.다.환원당인 sucrose 함량은 계속 증가하였고 fructose, glucose, sorbitol의 함량(추황의 sorbitol을 제외)은 생장이 촉진됨에 따라 증가하다가 다시 점차적으로 감소하였다. 이러한 결과는 총당과 환원당의 측정결과와 일치한 것으로 나타났다. 결론적으로 배의 성장에 따라 산 함량은 감소하였고 당 함량은 증가하였다.luco-pyranoside, quercetin 7-O- -glucopyranoside, acacetin 7-O-$\beta$-D-glucuronide and apigenin-6-C-$\beta$

• Textile Coloration and Finishing
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• v.7 no.2
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• pp.77-85
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• 1995

섬유와 인류의 관계는 실로 5,000년이 넘는다. $\ulcorner$섬유$\lrcorner$라고 하면 많은 사람들이 $\ulcorner$의복$\lrcorner$만을 연상한다. 따라서 의복이 왜 그렇게 대단한 기술이며 과학이겠는가 하고 반문하는 사람도 있다. 이는 의복이라는 단순한 개념의 섬유만을 상상하기 때문이다. 장구한 의복의 역사가 곧 섬유의 역사라고 생각하는 것 또한 무리는 아니다. 그런데 최근 우리의 경제부흥에 가장 큰 공헌을 한 산업이 섬유산업이라는 데는 이의가 있을 수 없다. 지금 세계의 섬유산업은 내실 크나큰 변화를 일으키고 있다. 이는 장구한 세월동안 축적되어 온 섬유기술이 새로운 첨단산업을 탄생시키고 새로운 산업분야를 형성시키고 있기 때문이다. 지금 섬유산업은 르네상스를 맞이하고 있다는 것이 현실이며, 섬유기술은 고차원적인 첨단기술시대를 열어가고 있다. 선진 제국들은 중요한 테크놀로지의 하나로 신소재공학 기술을 열어가고 있다. 그 예로서 항공, 우주, 해양, 원자력, 토목, 건축 분야 등에서 요구하고 있는 고강도 고탄성의 섬유, 내열, 방염, 내부식성인 즉 내환경성의 섬유, 일렉트로닉스 분야의 도전성, 압전성, 광전성, 방사선 차단성, 흡진성, 도광성의 특수기능섬유, 라이프사이언스분야의 생체적합성, 혈액적합성, 고분리기능성 등과 같은 바이오섬유, 이 모든 것들은 21세기 각 분야의 첨단공학을 실현시키는데 필요불가결한 것들이다.