[제 2 주제] Characteristics and Biological Functions of Egg Yolk Lipids: Human and Animal Studies

Gita Cherian 인제대학교 식품과학연구소 2003 仁濟食品科學FORUM論叢 Vol.10 No.-

Fatty Acid Modified Eggs as a Delivery System for Functional Lipids

Gita Cherian 한국식품영양과학회 2003 Preventive Nutrition and Food Science Vol.8 No.3

The chicken egg provides a perfectly packaged, portion controlled, highly nutritious food containing vital nutrients essential for maintaining human health. However, concern by health professionals over the possible association of diets high in fat and cholesterol to chronic diseases has led to a decrease in egg consumption. Several different strategies have been adopted by the poultry food industry to enhance the nutritional value of eggs. The major emphasis has been focused on the modification of polyunsaturated fatty acid composition and fat soluble vitamins. This review briefly describes the composition, lipid nutrient content and the positive health effects of egg lipid nutrients.

Suggestion on What to Prepare for the Performance Assessment for the Deep Geological Facility in Korea: Focusing on Buffer Mass Loss

Gitae Kim,Seong-Su Jeon,Sukhoon Kim,Jeong-Hwan Lee,Haeryong Jung 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.1

In buffer, a main component of engineering barrier system (EBS) in the deep geological repository, mass loss is mainly caused by upheave and mechanical erosion. The former is a phenomenon that bentonite in the upper part of the buffer moves to the backfill region due to groundwater intake and swelling. And, the latter is a phenomenon that bentonite on the surface of the buffer moves to the backfill region due to groundwater flow at the interface with host rock as the buffer saturates. Buffer mass loss adversely affects the fulfilment of the safety function of the buffer that is to limit and retard radionuclide release in the event of canister failure. Accordingly, in this paper, we reviewed how to consider this phenomenon in the performance assessment for the operating license application in Finland, and tentatively summarized data required to conduct the analysis for the domestic facility based on the review results. Regarding buffer mass loss, the previous studies carried out in Finland are categorized as follows: 1) experiment on the amount of buffer upheave with groundwater inflow rate (before backfilling), 2) analysis for the amount of buffer upheave with groundwater inflow rate (after backfilling), 3) analysis of buffer erosion rate with groundwater inflow rate, 4) analysis for distribution of the groundwater inflow rate into the buffer for all deposition holes (using ConnectFlow modeling results), and 5) analysis of buffer mass loss with groundwater salinity. Finally, the buffer mass loss distribution table was derived from the results of 1) through 3) by combining with that of 4). Given these studies, the following will be required for the performance assessment for buffer mass loss in the domestic disposal facility: a) distribution table of buffer mass loss for combined interactions taking into account effect of 5) (i.e. 1), 2), 3), and 5) + 4)), and b) Threshold for buffer mass loss starting to negatively affect the fulfilment of the safety function of the buffer. Even though it is judged that the results of this study could be directly applied to developing the design concept of EBS and to conducting the performance assessment in the domestic disposal facility, it is essential to prepare a set of input data reflecting the site-specific design features (e.g. dimension, material used, site, etc.), which include saturation time and groundwater salinity.

어린이 스마트폰 중독 예방을 위한 서비스 제안 : 외식 서비스를 중심으로

GiTae Do,KiHong Kim,SeungYoung Oh,HoeKyung Jeung,JoungYoun Lee 한국서비스디자인학회 2017 한국서비스디자인학회 학술대회자료집 Vol.2017 No.1

Fusion Weldabilities of Advanced High Manganese Steels: A Review

Gitae Park,Seonghoon Jeong,Changhee Lee 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.7

A large amount of manganese has been added to next-generation advanced high strength steels for automotive applications. The increased manganese content changes the microstructural and mechanical characteristics by varying both the stackingfault energy and the austenite stability, but it is known to deteriorate weldability. The current review provides a general strategyto address several problems in fusion welds of advanced high manganese steels from the viewpoint of microstructuraltransitions, plasticity mechanism, and mechanical properties based on the welding metallurgy. The importance of researchon the weldabilities of advanced Mn steels was highlighted. Among the representative types of advanced manganese steels,this review focuses on high Mn twinning-induced plasticity steel, high Mn austenitic lightweight steel, and medium Mntransformation-induced plasticity steel. Specifically, this review suggests fundamental concepts for designing each steelwith improved weld characteristics by presenting many research results on the correlations between the microstructure andmechanical properties of welds and heat-affected zones for these three different steel groups.

New directions in policy borrowing research

Gita Steiner-Khamsi 서울대학교 교육연구소 2016 Asia Pacific Education Review Vol.17 No.3

Research on policy borrowing is a well-established research area of comparative education. Over the past 20 years or so it gained prominence among globalization scholars. Of great interest is not so much the question of which reforms “travel” internationally, and which ones are homebound, but rather why traveling reforms resonate in a given context and at a specific moment, and how they are subsequently translated or locally adapted. In addition to issues of reception and translation, questions on the politics and economics of policy transfer are central to this research area. Empirical studies have shown that borrowing reforms from other countries, from other sectors within a country, or from “international standards” broadly defined often help coalition-building in a country. Policy borrowing also helps to mobilize financial resources, especially when it is preceded by political talk of falling behind some international standards or “best practices.” Therefore, the methods of inquiry used, the type of research questions asked, and the conclusions drawn in this body of research tend to address political and economic aspects of educational reform. Arguably, a transnational perspective is indispensable to carry out this kind of intellectual project. The academic preoccupation with policy borrowing has helped to formulate the contours of comparative policy studies. The article provides a brief overview of the main tenets of policy borrowing research and then focuses specifically on three aspects: policy reception, policy projection, and the rise of the global education industry as a new actor and beneficiary of global education policy.

Kinetics Study on Low-Temperature Tempering of Martensitic Phase in Medium Mn Steel Weldment During Paint-Baking Heat Treatment

Gitae Park,Kwangjoong Kim,Youngchai Lee,Sangho Uhm,Changhee Lee 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.5

The kinetics of low-temperature tempering in a dissimilar resistance spot weldment between medium Mn transformationinducedplasticity (MT) steel and dual-phase (DP) steel were investigated to interpret the change of failure mode after apaint-baking process. After the isothermal heat treatments with various soaking conditions, the Johnson–Mehl–Avrami (JMA)model describing nucleation and growth kinetics was adopted. The results indicated that the tempering kinetics parameterswere different for each area of the welds. Especially in the coarse-grained heat-affected zone (CGHAZ) in the MT steel,carbon diffusion from martensite to austenite acts as a tempering mechanism at an earlier stage of tempering. Thereafter,the tempering mechanism changes to epsilon carbide precipitation and coarsening. In comparison, the change was relativelyslow or absent in the DP steel CGHAZ and fusion zone because of its lower kinetics parameters. Based on the results ofthis study, ways to improve the cross-tension strength of entire welds in automotive applications of MT steel are discussed.

K-Band Dual-Mode Receiver CMOS IC for FMCW/UWB Radar

Gitae Pyo,Jaemo Yang,Chol-Young Kim,Songcheol Hong IEEE 2014 IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS PART 2 E Vol.61 No.6

<P>This brief presents a fully integrated CMOS receiver that is capable of dual-mode frequency-modulated continuous-wave (FMCW) and ultrawideband (UWB) radar operations using the 0.13-μm CMOS technology. The circuit consists of a low-noise amplifier, active mixers, an in-phase and quadrature generator, and buffers. In the proposed receiver, not only the gain but also the bandwidth of the overall receiver can be tailored by the switching of the center frequencies of stages and without lowering the quality factor of each stage. As a result, the receiver achieves a conversion gain of 36.7 dB, a 1-dB power gain compression point (P1dB) of -29.7 dBm, and a double sideband (DSB) noise figure (NF) of 6.1 dB in the narrowband FMCW mode. The receiver also achieves a conversion gain of 27.4 dB with a 3-dB bandwidth of 6.1 GHz, a P1dB of -21.6 dBm, and a DSB NF of 7.4 dB in the UWB pulse mode. Its performance is comparable with that of previously published chips that only operate in a single mode.</P>

Characteristics and Biological Functions of Egg Yolk Lipids : Human and Animal Studies 제2주제

Gita, Cherian 仁濟大學校食品科學硏究所 2003 仁濟食品科學FORUM論叢 Vol.- No.10

중망간TRIP강의 저항점용접 특성

박기태(Gitae Park),엄상호(Sangho Uhm),이창희(Changhee Lee) 대한용접·접합학회 2021 대한용접·접합학회지 Vol.39 No.3

Medium Mn TRIP steels have a dual-phase matrix of ferrite and austenite containing intentionally redistributed manganese and carbon contents to obtain stable austenite at room temperature. However, regardless of similar and dissimilar weldment, coarse-grained HAZ and FZ undergo martensitic transformation during heating above the Ac₃ temperature and then rapid cooling to room temperature. Then the high retained austenite content is sharply reduced, resulting in deterioration of mechanical properties with increased brittleness. Various ways to improve weldability have been proposed, and the paint-baking heat treatment process during automotive production can drastically improve the tensile properties of martensite, even when conducted at low temperature. This paper highlights the main characteristics and microstructural changes in the resistance spot welding of medium Mn TRIP steel, which is expected to be used as a next-generation automotive steel sheet.