• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2007.11a
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• pp.340-341
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• 2007

Thin film of ZnO was deposited on various substrate by Nd:YAG Pulsed Laser Deposition(PLD) with a wavelength of 355nm. Further more, Thin filme of ZnO conducted by various temperature conditions. The surface morphology of the ZnO thin film was investigated by X-Ray Diffraction(XRD) and Atomic Force Microscopy(AFM). Effects of various substrates and Temperature conditions were analyzed. The best properties were obtained on $600^{\circ}C$ with post-deposition annealing at $600^{\circ}C$ in flowing $O_2$ atmosphere for several hours.

• Korean Journal Plant Pathology
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• v.12 no.4
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• pp.466-470
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• 1996

본 연구는 우리 나라 감귤에 발생하는 주요 병의 최근 발생 동향을 파악하기 위하여 수행되었다. 1995년과 1996년 조사 포장에서 12종의 병해가 확인되었는데 그 중에서 검은점무늬병, 더뎅이병 및 잿빛곰팡이병이 감귤 재배에서 주요 병해로 밝혀졌다. 1995년과 1996년 무방제 포장에서 조사한 더뎅이병의 이병과율은 89.0∼100%, 검은점무늬병의 이병과율은 99.0∼99.5%인 반면에 잿빛곰팡이병의 이병과율은 23.0∼24.0%였다. 한편 더뎅이병과 검은점무늬병은 발병율이 높음에도 불구하고 약제 방제가 비교적 잘 되지만 잿빛곰팡이병은 노지에 비해 비닐하우스에서 발생이 많고 약제 방제가 잘 되지 않음을 알 수 있었다. 과거 주요 병해였던 궤양병은 지금은 경미한 피해를 주는 병해로 전환되어 온주밀감 수출단지가 아닌 일부 재배지에서만 경미하게 발생하고 있음이 확인되었다.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2000.11a
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• pp.809-814
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• 2000

이 연구의 목적은 비침투적으로 펌프의 유량을 알아내고, 이를 이용하여 펌프의 성능을 감시하는데 있다. 그리고 운전중인 펌프의 상태를 감시함으로써 펌프의 결함을 진단하는데 있다. 위 목적을 달성하기 위하여 본 연구에서는 비침투적으로 측정이 가능한 변수인 모터 토크와 회전속도를 이용하여 펌프의 성능을 예측할 때 필수석인 유량을 알아내는 Simulator를 개발하였다. 유량의 변화를 감시함으로써 펌프의 성능 변화를 감시하는 일반적인 방법을 적용하면 펌프의 성능을 효율적이며 경제적으로 감시를 하는데 이용할 수 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.1146-1149
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• 2012

본 연구는 노지에서의 와인용 포도 재배에 있어서 병충해에 대한 실시간 모니터링과 선제적 예방활동을 위해 무선센서 네트워크(Wireless Sensor Network)를 활용하여 데이터를 수집하고 온습도정보, 이미지 등의 분석을 하고 병충해 지식은행을 통한 병충해 발생 확인 및 최적의 조치를 제안하여 와인용 포도의 병충해 피해를 예방하고 생산성을 높일 수 있도록 하는 시스템에 관한 것이다. WSN 센서 노드는 각 블럭 별 및 지형 특성상 높은 고도의 위치 등 다수의 지점에 설치되어 온도 습도 등 환경 데이터를 수집하고, 이미지 센서를 통해 주기적 이미지데이터를 전달하여 지식은행의 데이터를 바탕으로 병충해 발생으로 인한 와인용 포도 재배에 피해가 예상되는 현상을 미리 예측하고 그 해결방안을 제시하여 재배자가 선제적으로 대처할 수 있도록 하여 피해를 최소화한다.

• East Asian mathematical journal
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• v.35 no.4
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• pp.509-528
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• 2019

As various changes in education in general and learning environment in particular have promoted different needs and expectations for learning at both personal and social levels, the roles that schools and school teachers typically have with respect to their students are being challenged. Especially with the recent, rapid progress of the artificial intelligence(AI) field, AI could serve beyond the way in which it has been used. Based on a review of some of the related literature and the current development of AI, a view on utilizing AI to be a collaborative, complementary partner with an human mathematics teacher in the classroom in order to support both students and teachers will be discussed.

• Korean Journal of Clinical Pharmacy
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• v.28 no.4
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• pp.273-278
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• 2018

Bile acids are major constituents of bile and known to help absorb dietary fat and fat-soluble vitamins in the gastrointestinal tract. In the past few decades, many studies have shown that bile acids not only play a role in fat digestion but also function as broad range of signal transduction hormones by binding to various receptors present in cell membranes or nuclei. Bile acid receptors are distributed in a wide range of organs and tissues in the human body. They perform multitudes of physiological functions with complex mechanisms. When bile acids bind to their receptors, they regulate fat and glucose metabolism in a tissue-specific way. In addition, bile acids are shown to inhibit inflammation and fibrosis in the liver. Considering the roles of bile acids as metabolic regulators, bile acids and their receptors can be very attractive targets in treating metabolic disorders. In the future, if roles of bile acids and their receptors are further clarified, they will be the novel target of drugs in the treatment of various metabolic diseases.

• Journal of the Earthquake Engineering Society of Korea
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• v.23 no.2
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• pp.109-117
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• 2019

In this study, a design procedure for the practical application of the dampers to building structures under earthquake loads was presented by using earthquake response spectrum. Nonlinear time history results using a 10 story building structure installed with damper verified the effectiveness of the proposed procedure by showing that the structural response could be reduced to the target performance level for seismic loads. Since the proposed design procedures are based on response spectrum seismic analysis result of the original structure, the capacity, location and the number of damper and the consequent response reduction effects can be preliminarily determined without performing the nonlinear time history analysis.

• East Asian mathematical journal
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• v.37 no.4
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• pp.481-497
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• 2021

The importance of statistics in everyday life and work place has led to calls for an increased attention to statistical literacy in the mathematics curriculum both internationally and domestically. While professional organizations and researchers propose perspectives towards and models of statistical literacy, conceptions and elements of statistical literacy vary. This study examines how mathematics textbook questions fulfill the requirements of statistical literacy by employing two models: Watson's model focusing on understanding of statistical language and Curcio's model on data interpretation aspects of statistical literacy. For this, a total of 872 problem questions presented in the statistics units of from ten textbooks for the middle school year 1 mathematics were analyzed.

• East Asian mathematical journal
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• v.38 no.4
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• pp.517-532
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• 2022

This study looked at how content reviews with mathematical games in class would influence the mathematical disposition of middle school students. In doing so, three games adapted from prior research were used as a supplementary instruction after school hours over three months. The mathematical topics of the games involved concepts of probability and trigonometry at the middle school level. The results of the pre- and post-survey on mathematical disposition indicate that incorporating mathematical games appeared to have some positive impacts on whether students might be more eager to learn mathematics and actually put more effort in learning materials.

• East Asian mathematical journal
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• v.39 no.2
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• pp.183-198
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• 2023

Classroom observation instruments are often used to evaluate teachers' instructional practices and provide feedback to inform interventions or research studies, or professional development efforts. While designed as research tools, many classroom observation instruments can provide important information to support teachers' learning and instructional change by providing a focus for formative assessment or self-evaluation of practice. In this paper, we review two classroom observation tools and the protocols for their use with an implementation example for one of the tools. These tools are more foreign to the field compared to others but have features that might serve as affordances in relation to the purposes of a specific investigation.