• 한국식품위생안전성학회지
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• 제18권2호
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• pp.87-93
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• 2003

본 연구는 aflatoxin이 오염된 옥수수에서 각 전처치 방법과 조리 및 가공 방법에 따라 aflatoxin이 감소되는 정도를 관찰하고자 수행되었다. Aspergillus parasiticus ATCC 15517을 접종하여 aflatoxin을 생성시킨 옥수수(GCB70, 미국산)에 태양 광선 조사, UV 조사 및 물 세척 등의 전처치를 실시하였으며, 각 전처치 후의 시료를 옥수수의 일반적인 조리 및 가공 방법(끓이기, 찌기, 굽기 및 튀기기)에 따라 죽, 떡, 빵 및 팝콘을 만들었다. Aflatoxin이 생성된 옥수수 시료(AC)와 전처치에 따른 부과물로서 AC에 태양 광선을 7일 조사시킨 시료(SC), UV를 56시간(7일간) 조사시킨 시료(UC)및 물 세척을 3회 수행한 시료(WC), 그리고 이들의 조리 및 가공 완성품에 대한 aflatoxin 함량을 HPLC로 정량하였다. AC의 total aflatoxin함량은 전처치 시료에서는 태양 광선 조사시와 UV조사시(UC)에 유의하게 감소하였으며(p<0.05), 물 세척시에는 감소하였으나 유의한 감소는 아니었다. AC, SC, UC 및 WC를 조리 및 가공하였을 때 평균적으로 죽＞팝콘>떡＞빵의 순으로 aflatoxin이 감소되었다. 이로부터 aflatoxin에 오염된 옥수수의 조리 및 가공전 태양 광선 조사와 UV조사는 aflatoxin분해에 효과적인 것으로 나타났다. 또한 끓이기, 찌기, 굽기 및 튀기기 등의 조리 및 가공 방법은 aflatoxin의 감소에 도움이 되며, 특히 열에 지속적으로 노출되는 것이 가장 효과적인 것으로 나타났다. Aflatoxin이 오염된 옥수수에서 aflatoxin을 식품 중 기준치 이하로 감소시키기 위하여 더 많은 연구가 필요하다.

• 한국토양비료학회지
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• 제43권6호
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• pp.962-967
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• 2010

가축분퇴비 시용시 시비질소의 이용효율 증진 도모를 위한 기초자료를 얻고자 토양 비옥도가 다른 두 토양 (Soil-L와 Soil-H)에서 돈분 퇴비와 질소비료 (요소)의 혼용비율을 달리하여 포장조건에서 배추를 포트 재배시험을 실시하였다. 배추수량은 Soil-L에서는 시용질소를 전량 화학비료로 시비한 NPK 대비 돈분퇴비로 시용한 COM 100 처리구에서 17% 감소한 반면, 화학비료 질소와 퇴비를 혼용한 3처리 (COM 70+N30, COM50+N50 및 COM30+N70) 에서는 통계적 유의한 차이가 없었다. Soil-H에서는 NPK 대비 COM100 처리구에서 23.6%의 수량감소를 보였다. 배추의 질소흡수량은 두 토양 공히 NPK 처리구와 N70+COM30 처리구에서 가장 많았다. 시비 질소에 대한 배추의 생산효율은 두 토양 모두 화학비료의 시비량이 증가함에 따라 증가되었다. 그리고 화학비료를 전량 시비한 NPK 처리구에서 두 토양의 질소 생산효율은 큰 차이를 보이지 않았지만, 질소 시비량을 전량 퇴비로 시용한 COM 100 처리구에서는 Soil-L에서 28.8 g $g^{-1}$으로 Soil-H 16.2 g $g^{-1}$보다 현저히 높았다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 1999년도 Proceedings of International Symposium on Remote Sensing
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• pp.84-88
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• 1999

Recently, the necessity of accessing spatial data from remote computer via network has been increased as distributed spatial data have been increased due to their size and cost. Many methods have been used in recent years for transferring spatial data, such as socket, CORBA, HTTP, RPC, FTP, etc. In this paper, we propose spatial clearinghouse components to access distributed spatial data sources via CORBA and Internet. The spatial clearinghouse components are defined as OLE/COM components that enable users to access spatial data that meet their requests from remote computer. For reusability, we design the spatial clearinghouse with UML and implement it as a set of components. In order to enhance interoperability among different platforms in distributed computing environment, we adopt international standards and open architecture such as CORBA, HTTB, and OpenGIS Simple Features Specifications. There are two kinds of spatial clearinghouse: CORBA-based spatial clearinghouse and Internet-based spatial clearinghouse. The CORBA-based spatial clearinghouse supports COM-CORBA bridge to access spatial data from remote data providers that satisfy the OpenGIS Simple Features Specification for OLE/COM using COM and CORBA interfaces. The Internet-based spatial clearinghouse provides Web-service components to access spatial data from remote data providers using Web-browser.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.145-150
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• 2005

This paper presents an Electrotactile Display System (ETCS). One of the most important human sensory systems for human computer interaction is the sense of touch, which can be displayed to human through tactile output devices. To realize the sense of touch, electrotactile display produces controlled, localized touch sensation on the skin by passing small electric current. In electrotactile stimulation, the mechanoreceptors in the skin may be stimulated individually in order to display the sense of vibration, touch, itch, tingle, pressure etc. on the finger, palm, arm or any suitable location of the body by using appropriate electrodes and waveforms. We developed an ETCS and investigated effectiveness of the proposed system in terms of the perception of roughness of a surface by stimulating the palmar side of hand with different waveforms and the perception of direction and location information through forearm. Positive and negative pulse trains were tested with different current intensities and electrode switching times on the forearm or finger of the user with an electrode-embedded armband in order to investigate how subjects recognize displayed patterns and directions of stimulation.

• Bulletin of the Korean Chemical Society
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• 제28권12호
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• pp.2442-2444
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• 2007

CO adsorbates on the surface of Pt supported on carbon catalysts (Pt/C) were investigated by CO stripping voltammetry. Three types of CO adsorbed samples were prepared: by methanol dehydrogenation only (COm), by CO gas bubbling only (COg), and by methanol dehydrogenation followed by CO gas bubbling (COm+g). Our coverage data show that CO gas can be adsorbed on Pt/C catalyst already saturated with CO adsorbates by methanol dehydrogenation. The COm+g sample showed the properties of both COm as well as COg samples in terms of the potential although the CO adsorbed by dehydrogenation was completely exchanged with CO in the electrolyte solution. Therefore, the oxidation pathways of CO on Pt/C were observed to depend on the initial adsorption conditions of CO more strongly than on the CO coverage. Our results imply that an initial CO poisoning condition in fuel cell operation is an important factor to determine the difficulty in removing the adsorbed CO and confirm that the properties of the adsorbed CO do not change even with chemical replacement with CO in different conditions. In addition, our results indicate a low CO surface mobility on the Pt in an electrolyte solution.

• 한국운동역학회지
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• 제20권3호
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• pp.261-266
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• 2010

Human body is hard to be in perfect balance during walking. Most of time the trunk is supported by one leg and the center of mass(COM) falls to the contralateral side. Thus, dynamic variables such as the velocity of the COM should be considered when gait stability is evaluated. The purpose of this study was to investigate whether the extrapolated center of mass(XCom) which utilized the COM position and its velocity, is appropriate to evaluate gait stability. Ten healthy adults participated in this study and performed 3 different types of gaits(normal(NG), hands on waists(HWG), and hands on shoulders(HSG)) onto 4 different types of obstacle(obstacle height: 0%, 30%, 40% and 50% of leg length). Medio-lateral Com-CoP and XCom-CoP inclination angle were calculated during support phase. For all condition, greater M-L XCoM-CoP inclination angles were found(p<.05) compared with those of matched obstacle height CoM-CoP. Especially, M-L XCoM-CoP inclination angle at 50% height revealed the best condition for monitoring dynamic stability. Significantly increased in M-L XCoM-CoP inclination angle was found(p<.05) as obstacle height increased on NG and HWG.

• 한국염색가공학회지
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• 제26권3호
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• pp.151-158
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• 2014

The oil sorption capacities and biodegradability of nonwoven fabrics(pads) of PP and PP/kapok(10/90wt%) blend prepared in this study and commercial pad(T2COM: 100% PP) were compared. The biodegradability(58.5%) of PP/kapok(10/90wt%) blend pad was about 5times higher than those(11%) of PP and T2COM pads after 45days. The oil sorption rates of oil sorbent pads for various oils(diesel, lubricant and Bunker C oils) were markedly increased with increasing dipping time up to about 5min and then levelled off. The oil sorption rate and oil sorption capacity were found to increase in the order of PP/kapok(10/90wt%) blend>PP>commercial(T2COM) and Bunker C>lubricant>diesel.

• 자원리싸이클링
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• 제2권2호
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• pp.39-44
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• 1993

어룡탄광에서 산출되는 저질인 무연탄 슬러리를 Oil agglomeration 처리법으로 탈수하여 다음과 같은 결과를 얻었다. 저질 무연탄은 기름과 응집체(COM)를 형성하여 물과의 비중차이에 의해서 약 80%까지 분리되고 이때 COM을 만드는 각각 석유, 경유 또는 중유의 첨가량은 시료량의 10%정도이다. 무연탄에서 가연성분을 회수하고 회분을 제거할 수 있는 능력은 기름의 첨가율, 광액 농도, 광립의 입도, 교반시간, 교반강도에 크게 영향을 받는다. 최적조건인 상태에서 가연물질의 회수율은 약 95%까지 증가되었고, 회분의 함유율은 30%에서 13.5%로 감소되었다.

• 한국정보통신학회논문지
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• 제12권6호
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• pp.1113-1119
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• 2008

Zigbee 기반의 센서 네트워크를 IP 기반으로 대체하기 위한 IP-USN에서는 라우팅과 센서 노드에 대한 주소 배정 기법이 주요 핵심이다. 그러나, 기존의 계층적 라우팅은 End 노드를 고려하지 않아 라우팅시 모든 경로를 탐색해야 하는 단점이 있으며, End 노드 기반의 라우팅은 단순 경로 탐색만 지원하여 유동적인 센서 네트워크 환경을 충족하지 못하고 있다. 이에 본 논문에서는 기존 방법들의 장점만을 가진 ComHRP(Complement HRP)를 제안하고, 이에 따른 주소 배정 기법과 검색 방법을 제안한다. ComHRP는 센서 네트워크의 구성을 단순화하고, 네트워크 복잡도를 낮추는 효과를 지닌다. 또한, 예측 불가능한 유비쿼터스 센서 네트워크의 특성에 따른 네트워크 재구성을 효율적으로 처리할 수 있다.

• 유통과학연구
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• 제21권6호
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• pp.21-29
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• 2023

Purpose: Research on equity carve-outs is necessary because the market has realized that they lead to holding company discounts by double counting, which can only be observed in the Korean market. Considering the differences in the SSG.com equity carve-out compared to previous cases in terms of business strategy, this study contributes to the literature by examining the effects on shareholder value in the Korean distribution industry. Research design, data, and methodology: This study investigated literature, analyst reports, and news articles to examine the causes of holding company discounts and analyze the SSG.com equity carve-out. Results: The monopoly of holding companies' listing premiums is the main cause underlying holding company discounts from equity carve-outs. Protections for minority shareholder value are challenging owing to the complexity of the process of acquiring rights, the short exercise period, and additional costs. Therefore, the motivation for equity carve-outs should be to increase overall shareholder value. Conclusion: By analyzing the reasons for holding company discounts in the Korean distribution industry, this study provides recommendations for improving shareholder value. Moreover, it contributes to the maturation of the Korean capital market by promoting a discussion on the revision of equity carve-outs.