• Nutritional Sciences
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• v.5 no.3
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• pp.129-133
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• 2002

Obesity is a major public health problem in western countries. Genetic and environmental factors, separately or in combination are major determinants of fat mass. Both central effectors (primarily hypothalamus) and peripheral tissues (such as adipose tissue) are implicated in the pathogenesis of obesity. A significant number of studies have documented potential contribution of adipose tissue -via its newly discovered secretory function- to the pathogenesis of obesity and co-morbid conditions including cardiovascular disease, diabetes and hypertension. Applications of analytical techniques such as genomics and proteomics have enabled better understanding of biological sciences in general and have only being applied recently to nutritional sciences including obesity research. Here, we review the recent progress in adipose tissue functional genomics and proteomics, and the importance of these studies in energy metabolism and obesity research.

• The Bulletin of The Korean Astronomical Society
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• v.41 no.2
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• pp.67.2-67.2
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• 2016

The Sun has diverse variations in solar atmosphere's layers due to solar activity. This solar variations can be recognized easily by sunspots which appear on the solar photosphere. Thus the sunspot on the photosphere is utilized by direct index of the solar activity. The other variation of the photosphere is center-to-limb variation (CLV). In this study, we analyze the relative intensity observed by SOHO, SDO. The data of photospheric intensity are from full disk images of SOHO/MDI intensity ($6768{\AA}$, from May 1994 to March 2011) and of SDO/HMI intensity ($6173-6174{\AA}$, from May 2010 to June 2016). As the result, we found the latitudinal variation of the intensity. The daily photospheric intensity showed the solar cyclic variation with sunspot number. It has a little difference of phase with sunspot number.

• Annals of Clinical Neurophysiology
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• v.22 no.2
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• pp.104-108
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• 2020

We performed intraoperative neurophysiological monitoring (INM) during anteromesial temporal resection (AMTR) in a patient with lesional temporal lobe epilepsy. INM revealed a sudden decrease in N20 waves in somatosensory evoked potentials (SSEPs) and poor P100 waves in visual evoked potentials (VEPs). These changes developed after applying electrocoagulation in the right mesial temporal areas. Postoperative brain magnetic resonance imaging demonstrated right thalamic and medial occipital infarctions. SSEPs and VEPs monitoring can be useful for detecting posterior cerebral artery infarction in AMTR.

• Proceedings of the KIPE Conference
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• 2017.07a
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• pp.411-412
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• 2017

본 논문에서는 전기자동차의 1회 충전 주행거리 연장 및 연비 향상을 위하여 주요 운전 영역에서의 평균효율 극대화를 할 수 있는 다단 변속 회로를 제안하였다. 제안한 회로는 Thyristor를 이용한 직 병렬 변속회로로 구성되어 있다. Thyristor의 특성으로 인해 과도상태 없고 끊김없는 변속이 가능하여 추가적인 스너버회로가 필요 없으며, 낮은 스위치손실로 인해 AC전동기 시스템의 고효율 및 경량화를 기대할 수 있다. 제안한 다단변속 시스템의 타당성을 검증하기 위하여 1kW 급 시작품 1대를 AC전동기와 연계하여 변속 동작을 검증하였다.

• Annual Conference of KIPS
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• 2018.10a
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• pp.106-109
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• 2018

본 논문에서는 최근 혁신적인 거래시스템으로 각광받고있고 앞으로 다양한 응용 플랫폼이 개발 될 것으로 예상되는 블록체인 시스템의 안정적인 프로토콜 기능과 효율적 트래픽 운영을 제공하기 위한 하부 네트워크 구조로써 미래 네트워크의 필요 기능과 서비스에 대한 연구를 진행하였다. 이러한 하부 네트워크 구조로써 미래 네트워크의 필요 기능과 서비스에 대한 연구를 진행하였다. 이러한 하부 네트워크 구조는 현재 많이 사용되고 있는 인터넷 또는 OSI Reference 모델의 수정된 프로토콜 형태가 아니라 새로 표준화가 진행되고 있는 ISO/ISE JTC1 SC6의 미래 네트워크 구조에 필요한 서비스 기능을 위한 요구사항을 제시하고자 한다. 가까운 미래 블록체인이 대중화될 때 블록체인의 안정적인 동작과 효율적인 시스템 구성을 지원하기 위하여 하부 네트워크로 사용될 미래 네트워크의 요구사항들을 분석하고 분석된 내용을 바탕으로 앞으로 표준화가 진행될 미래 네트워크의 핵심 서비스 기능으로 제안하고자 한다.

• Annual Conference of KIPS
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• 2019.05a
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• pp.231-234
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• 2019

본 논문에서는 레미콘 타설 공정에서 스마트폰으로 현장 검사와 품질관리가 가능하도록 모바일 레미콘 품질 관리 시스템을 제안하였다. 또한 현장검사를 디지털화하기 위한 실시간 슬럼프 데이터 처리 부분을 함께 제안하였다. 검사자의 스마트폰을 이용하여 레미콘 현장검사의 영상을 실시간으로 전송하여 오류를 판단하고 레미콘 제품 이상 여부를 현장과 본사에서 실시간 공유가 가능하도록 하였다. 개발대상기술은 실제 결과 값과 영상 이미지 분석 등으로 제품에 대한 이상 여부가 판단되며 회사 및 현장에 적합한 정보 제공이 가능하다. 레미콘 품질 데이터 분석을 기반으로 원자재 관리 데이터와 연동함으로써 레미콘 업종의 가장 큰 문제 사항인 원자재 반입에 따른 최적의 배합 비율 제시가 가능하다.

• Journal of Engineering Education Research
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• v.21 no.3
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• pp.46-55
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• 2018

The purpose of this study was to develop the character index instrument for engineering college students. For this, literature review and survey were used. The survey was conducted with 275 engineering college students in D university. Finally, draft of character index instrument for engineering college students was developed with 10 factors and 47 questions. Based on the results, the investigation of engineering college students' needs is necessary to conduct for developing character education programs. And it is necessary to research validity of the draft of character index instrument for engineering college students. It is necessary to develop various convergence subjects by experiencing the character substantially for engineering college students.

• The Bulletin of The Korean Astronomical Society
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• v.43 no.2
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• pp.58.1-58.1
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• 2018

In the solar atmosphere, below the region of temperature minimum, temperature decreases with height and above it, temperature increases with height. Therefore the inference of temperature minimum is a basis of the study about the solar atmosphere and heating problem. The temperature of the temperature minimum region can be inferred from acoustic cutoff frequency. According to a recent study the acoustic cutoff frequency is related to the peak frequency of the power spectrum the chromospheric three-minute velocity oscillations. Using this relationship, we infer the temperature of temperature minimum. The three minute velocity oscillation and its power spectrum are obtained for a pore observed with the Fast Imaging Solar Spectrograph (FISS) $H{\alpha}$ band. We present the inferred temperature and compare it with the temperature of Maltby model. We also investigate the effect of the inclination of magnetic field on the temperature minimum.

• Journal of Surface Science and Engineering
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• v.55 no.3
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• pp.133-142
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• 2022

This paper reviews bipolar plate materials and coatings for polymer electrolyte fuel cell. First, six roles and 10 requirements of the bipolar plate are described in detail. Secondly, type of materials for the bipolar plate and their advantages and disadvantages are mentioned. Thirdly, different metallic materials are introduced in terms of electrical and thermal conductivities, corrosion resistance, weight, strength and cost. Finally, various types of coating materials and methods were briefly reviewed.

• Biomedical Science Letters
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• v.28 no.2
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• pp.101-108
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• 2022

High-fat diet (HFD)-fed ovariectomized (OVX) female mice were used as an animal model of obese postmenopausal women. We investigated the effects of ascorbic acid on the histological changes induced in the liver. Plasma alanine aminotransferase levels and liver weights were higher in mice fed an HFD for 18 weeks than in mice fed a low-fat diet, effects that were inhibited by ascorbic acid. Similarly, mice fed an ascorbic acid-supplemented HFD had less hepatic lipid accumulation than did mice fed an HFD alone. Moreover, administration of ascorbic acid reduced inflammatory cells, including mast cells and CD68-positive cells, and inflammatory foci in the liver and inhibited hepatocyte ballooning. Hepatic collagen levels were lower in ascorbic acid-treated versus non-treated mice. These results suggest that ascorbic acid inhibits hepatic steatosis, inflammation, and fibrosis in obese OVX mice. Thus, ascorbic acid intake may be useful for postmenopausal women with nonalcoholic fatty liver disease.