• Journal of Magnetics
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• 제16권4호
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• pp.323-327
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• 2011

By means of Monte Carlo simulation, we investigate the effects of interface roughness and temperature on the exchange bias and coercivity in ferromagnetic (FM)/antiferromagnetic (AFM) bilayers. Both exchange bias and coercivity are strongly dependent on interface roughness. For a perfect uncompensated interface a domain wall is formed in the AFM system during FM reversal, which results in a very small exchange bias. However, a finite interface roughness leads to a finite value of the exchange bias due to the existence of pinned spins at the AFM surface adjacent to the mixed interface. It is observed that the exchange bias decreases with increasing temperature, consistent with the experimental results. It is also observed that a bump in coercivity occurs around the blocking temperature.

• 대한영양사협회학술지
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• 제7권1호
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• pp.9-18
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• 2001

Dietitians in various fields have used food exchange lists for food preparations. However it seems that the present food exchange lists are complicated, thus they cause many problems for dietitians to use in the fields. Therefore this study evaluated to the extent of awareness and utilizations of KDA food exchange lists in dietitians and also collected dietitian's opinions for revising food exchange lists such as serving size, serving calories, and for unifying food guidelines and dietary and dietary guidelines for Korean to one simple guideline. 192 dietitians who presently work in urban and rural areas were recruited and data based on survey were collected. As results, most of dietitians(87.5%) knew well about food exchange lists, but only 7.8% of them always would use food exchange lists for menu planning, 56.3% of dietitians did not use it at all and 34.4% occasionally use it. And 88.0% of dietitians wanted to revise food exchange lists totally or partially, 69.8% of dietitians hoped to amend various calories per one serving in food exchange lists to one serving calorie. The desirable on serving calorie was selected as 100kcal(51%) or 50kcal(38%) by dietitians. The dietitians in this study understood very well dietary guidelines(86.5%) and food guidelines(88.5%) for Korean, and 66.1% dietitians wanted to unify both guidelines. In case of unification of guidelines, dietitians answered that 7-8 items(30%) or 5-6 items(27%) should be included in guideline. In the question about reference value for daily allowance, most dietitians(56%) satisfied with the present various reference values for various generation while 28% of dietitians wanted to change to have one reference value (standard with 2000kcal, adult female). This study will provide basic informations for revising or adjustment of food exchange list and dietary or food guidelines for Korean.

• 멤브레인
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• 제33권3호
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• pp.137-147
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• 2023

본 연구에서는 현탁중합을 통해 이온교환입자를 합성하였다. 또한 음이온 교환막을 제조하기 위해 brominated poly(phenylene oxide) (Br-PPO)로 교환막 합성을 진행하였으며, 합성한 이온교환입자를 Br-PPO에 첨가하여 음이온 교환막에 성능을 향상시키고자 하였고, 이를 적용하여 음이온 교환막 연료전지 시스템의 성능 평가를 진행했다. 이온교환입자는 FT-IR, TGA 및 UTM을 통해 구조 분석, 열적 기계적 특성을 평가하였다. Br-PPO는 NMR을 통해 화학적 구조 분석 및 합성여부를 확인하였고, 음이온 교환막 연료 전지 셀 테스트를 진행하기 전 이온전도도와 이온교환용량, 팽윤도 및 수분함수율을 측정해 연구되고 있는 다른 음이온 교환막들과 비교를 통해 성능을 평가했다. 최종적으로 가장 성능이 우수했던 이온교환입자를 0.7 wt%를 첨가한 Br-PPO-TMA- SDV 음이온 교환막을 연료전지 시스템에 도입하여 상용 막인 FAA-3-50과 성능을 비교했다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.378-379
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• 2011

전력거래소는 전력계통 운영과 전력시장 운영을 위하여 각각 계통운영시스템과 시장운영시스템을 운영하고 있는데 현행 시스템이 2013년을 전후로 한계수명에 도달할 것으로 예상이 된다. 또한 공공기관 지방이전 정책에 따른 전력거래소 본사 이전도 추진되고 있어 노후화가 예상되는 현행 전력IT시스템을 교체하여 신규로 구축하는 사업을 추진중에 있다. 본 논문에서는 이러한 차기 전력IT시스템 구축 사업의 배경과 주요 추진계획을 간략하게 기술하고자 한다.

• 전기학회논문지
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• 제59권12호
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• pp.2235-2239
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• 2010

In this study, The cation exchange membrane and the anion exchange membrane affect in electrical conduction of metal fuel cell was investigated. Magnesium material as anode electrode and the NaCl solution dissolved with 5~15wt% as electrolyte were used for the metal fuel cell. It was found that magnesium slag where flows toward the air electrode was suppressed by using ion exchange membrane. The open circuit voltage variation during discharge has very flat pattern by using ion exchange membrane, but the case which is not the exchange membrane, the open circuit voltage increased according to time. When using the anion exchange membrane, the electric current was higher case of the cation exchange membrane, as a result of higher equivalent conductivity in anion Cl-. The cation exchange membrane was observed with the fact that the output power is excellent in compared with anion exchange membrane.

• Industrial Engineering and Management Systems
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• 제6권1호
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• pp.55-63
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• 2007

Exchange of information is essential to the process of innovation such as product development. However, in many cases innovation fails because of a lack of knowledge sharing among parties concerned, even if parties individually have pieces of useful knowledge and skills. Besides physical factors like communication costs, the possibility of opportunistic behavior by parties like stealing ideas can discourage information exchange. This paper introduces a model to analyze incentives of information exchange. The model is a game by two players who alternately opt to offer information to the partner. It is suggested that information exchange can stop before reaching the efficient level. In order to attain the efficient information exchange, expectation of mutual benefit and absence of opportunistic motives in both players are needed. Methods for promoting information exchange include modifying payoff structure to meet the condition of information exchange. The fluidity of partnership may increase a variety of information exchange partners, but discourage building trust between partners which promotes information exchange.

• 한국정보과학회논문지:시스템및이론
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• 제30권3_4호
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• pp.160-167
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• 2003

정적 shuffle-exchange 네트워크는 여러 응용 알고리듬에 적용되고 현재 많이 사용되는 다중 단계 네트워크에 비해 적은 하드웨어를 사용하는 등 많은 장점이 있으나 아직까지 어떤 병렬처리 컴퓨터에도 채택된 없었다. 그 이유 중에 하나는 결함 내성 기능이 없었기 때문이다. 본 논문에서는 다중 결함 포용 정적 shuffle-exchange network를 소개한다. 본 논문에서 제시되는 결함 포용 정적shuffle-exchange 네트워크는 k 결함을 제어하기 위해서 최소 2k의 추가 처리 요소들과 각 처리 요소들은 최대 4k의 추가 shuffle 링크를 필요로 한다. k 결함 내성을 가진 정적 shuffle-exchange 네트워크를 m개의 동일한 모듈로 분리하여 네트워크의 신뢰성을 증가시키는 것을 보였다.

• The Journal of Asian Finance, Economics and Business
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• 제9권10호
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• pp.49-59
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• 2022

This paper examined the impact of real exchange rate volatility on trade balance in Malaysia by using quarterly data from year 2000 until 2019. Generalized Autoregressive Heteroscedasticity (GARCH) model was used to extract the volatility component of real exchange rate before examining its impact on trade balance. Furthermore, Autoregressive Distributed Lag (ARDL) model was used to investigate the long-run relationship and short-run dynamic between trade balance, money supply, national income and volatility of exchange rate. Empirical results show the existence of co-movement between variables under study in the long-run. However, the results also suggest that volatility of real exchange rate does not significantly affect trade balance neither in the long-run nor short-run. The risk which is associated in the movement of exchange rate do not influence trader's behaviour toward Malaysia exports and imports. Thus, it should be note that any depreciation or appreciation in Malaysian Ringgit do not have an impact towards trade balance either it is being further improved or deteriorates. Hence, exchange rate volatility may not be too concern for policymakers. This may be partially due to manage floating exchange rate regime that has been adopted by Malaysia eventually eliminated the element of risk in the currency market.

• 대한영양사협회학술지
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• 제10권2호
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• pp.129-142
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• 2004

The food exchanges are frequently used to nutrition education and counseling for diabetes, weight control, hyperlipidema and etc. But it is difficult to find out food exchange lists with food exchange groups in the food composition table. This study was conducted to select e-food exchange of commonly used foods(456 foods) and improve search system based on internet. Also, the e-food exchange database was developed as having the proximate composition, mineral and vitamin content such as energy, moisture, protein, fat, carbohydrate, ash, calcium, phosphorus, iron, sodium, potassium, retinol equivalent, retinol, a-carotene, thiamin, riboflavin, niacin, ascorbic acid, refuse per 100g of each food. The e-food exchange database developed is basically based on the 6th food composition table(2001) of the National Rural Living Science Institution in Rural Development Administration, Korea. The 456 commonly used foods or 2,262, all foods can be searched easily in a new system. A specific food of e-food exchange can be searched by a given set of food groups or food name and can give information about food one exchange lists, weight and nutrient value per 100g of each food user-friendly on internet. It can be used to make a nutritionally balanced meal plan, nutrition education and counseling.

• 한국농촌건축학회논문집
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• 제13권2호
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• pp.31-38
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• 2011

The domestic rural villages have faced on the many problems in future society. The major purposes of this paper are to clarify in space program for the Rural Activating through the Urban-Rural Exchange. Firstly, it has examined the rural amenities of rural resources, such as natural surroundings, culture, history, landscape, economy, community power etc. Secondary, it was checked about analysis of operation programs corresponding to the rural resources. Thirdly, These space program of Urban-Rural Exchange, which has been archived process of spacial planning, was investigated the spacial conditions corresponding to the operation programs. To make Urban-Rural Exchange Center, it was necessary to analyze physical spacial size of building gross area, by data of cross checking with the area per capita and area per household in the rural village. According to the research, Urban-Rural Exchange Center was to be included visiting center, multipurpose room and dining room, exhibiting space, conference room, experience room, welfare space and specialized room with activation of rural village. However additional conditions are required that it is based on the sustainable development, environmentally friendly architecture both operation program and space program for the value of common society, citizen and villagers.