• Mycobiology
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• 제39권2호
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• pp.109-112
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• 2011

Vitis hybrid (Sheridan)-Robus coreanus red wine was vinified by fermentation of a mixture of Vitis hybrid and Robus coreanus must at $25^{\circ}C$ for 10 days. The Vitis hybrid-Robus coreanus red wine had ethanol contents of 10.9%. It had high antihypertensive angiotensin I-converting enzyme (ACE) inhibitory activity of 57.8% and antioxidant activity of 64.8%. Changes in the physicochemical properties and functionality of the Vitis hybrid-Robus coreanus red wine was investigated during a post-fermentation period of three months. The ACE inhibitory activity of the red wine increased as the post-fermentation period prolonged, and showed the highest ACE inhibitory activity of 70.4% 60 days post-fermentation. However, the antioxidant activity declined significantly to 47.2% during the post-fermentation period of 60 days. In terms of sensory evaluation, the Vitis hybrid-Robus coreanus red wine had the best acceptability 60 days post-fermentation.

• 한국식품조리과학회지
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• 제29권2호
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• pp.115-122
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• 2013

This study investigated the quality and antioxidative properties of a Korean steamed-rice cake, Sulgidduk added with Prunus yedoensis Matsumura extract, and vitamin C. Sulgidduk was prepared by adding Prunus yedoensis Matsumura extract at 0, 0.1, 0.2, and 0.3% of rice powder. Antioxidant activities were measured by the scavenging activities of DPPH radicals, $ABTS^+$ radicals, $superoxide^-$ radicals and the reducing power. For analyzing quality characteristics, proximate composition, color, texture profile analysis, and sensory evaluations were measured. The antioxidative effect of the Sulgidduk significantly increased as the addition level increased, compared to the original Sulgidduk (p<0.001). As the content of Prunus yedoensis Matsumura extracts increased, L-values significantly decreased while the a-value and b-value significantly increased (p<0.001). For the texture profile analysis, the control group had a significantly higher value for hardness as compared to the Prunus yedoensis Matsumura extract-added groups (p<0.05). Springiness, chewiness and adhesiveness were not significantly different among the samples. In the sensory evaluation, the samples containing 0.1% and 0.2% Prunus yedoensis Matsumura extracts obtained better results in attribute. From these results, we suggest that Prunus yedoensis Matsumura is a good ingredient for increasing the consumer acceptability and the functionality of Sulgidduk.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2004년도 ICEIC The International Conference on Electronics Informations and Communications
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• pp.421-426
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• 2004

Analyzing adaptive possibilities of agents in multi-agents system, we have discovered new aspects of ambient intelligence in distributed modular systems using intelligent building blocks (I-BLOCKS) [1]. This paper describes early scientific researches related to technical design, applicable experiments and evaluation of adaptive processing and information interaction among I-BLOCKS allowing users to easily develop ambient intelligence applications. The processing technology presented in this paper is embedded inside each DUPLO1 brick by microprocessor as well as selected sensors and actuators in addition. Behaviors of an I-BLOCKS modular structure are defined by the internal processing functionality of each I-Blocks in such structure and communication capacities between I-BLOCKS. Users of the I-BLOCKS system can do 'programming by building' and thereby create specific functionalities of a modular structure of intelligent artefacts without the need to learn and use traditional programming language. From investigating different effects of modem artificial intelligence, I-BLOCKS we have developed might possibly contain potential possibilities for developing applications in ambient intelligence (AmI) environments. To illustrate these possibilities, the paper presents a range of different experimental scenarios in which I-BLOCKS have been used to set-up reconfigurable modular systems. The paper also reports briefly about earlier experiments of I-BLOCKS in different research fields, allowing users to construct AmI applications by a just defined concept of modular artefacts [3].

• 대한임베디드공학회논문지
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• 제13권3호
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• pp.133-141
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• 2018

There are increasing interests on smart home systems. However, most of the existing works focus on the functionality itself. In this paper, we propose an extensible smart home system based on low power networking such as CoAP, 6LoWPAN, and Zigbee. The proposed home IoT system consists of Home APP, Home Server, Home Broker, and Power Devices. Each component of the system is connected by the low-power network technologies aforementioned. As the end device, Power Device senses the current consumption of the attached appliance and controls the power to it. Power Device reports the sensing data to Home Server via Home Broker. The Home Broker enhances the scalability of the system. Home Broker extends the service area and the user's services, and it manages the connection of the underlying devices and processes, and transmits data to Home Server from Power Devices. Through the experimental evaluation, we show that the proposed system achieves the design goals such as extensibility and low power networking.

• 한국통신학회논문지
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• 제30권1C호
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• pp.9-17
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• 2005

XML은 데이터 표현과 교환을 위한 표준으로 급격히 자리잡아가고 있으며, XML 문서는 다양한 응용분야에 도입되고 있다. 이러한 흐름에 따라 데이터베이스 분야에서도 XML 문서 데이터의 효율적인 저장과 검색에 관한 연구가 활발히 진행되어왔다. 최근에 여러 상용 (객체) 관계형 DBMS에서 XML 데이터베이스를 지원하고 있으며, Native XML DBMS도 학계와 산업계에서 지속적으로 개발되고 있는 실정이다. 또한, 이러한 여러 종류의 XML 데이터베이스의 성능을 평가하기 위한 다양한 종류의 벤치마크가 제안되었다. 본 논문에서는 특정 객체 관계형 DBMS를 이용해서 XBench 벤치마크를 수행해서 객체 관계형 데이터베이스의 성능을 평가/분석하는데 향후 개선 방향을 밝히는데 그 목적이 있다.

• 동아시아식생활학회지
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• 제17권2호
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• pp.274-287
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• 2007

The purpose of this study was to examine the actual state of cooking wine usage, and analyze the relationship between the attributes of cooking wine and demographic characteristics. The major findings of this study are as follows. First, the origin and correct choice of cooking wine were significantly related to hotel type, restaurant type and career. Second, the importance of the taste and aroma of a cooking wine, which are intrinsic attributes in the evaluation of a wine, had significant relationships with all the demographic variables whereas the importance of purchase cost and label information of the cooking wine only exhibited a significant correlation with career (p<0.05). Third, 53.7% of the respondents used cooking wine based on recipes, while the rest used it by rule of thumb. These results between restaurant type were significantly different (p<0.05). For the results of this research to be of more use, further research should be conducted on the functional aspects of cooking wine and their effects on cooking. In addition, further systematic research should be performed on the functional and sensory effects of a variety of wine tastes and aromas on cooking.

• 한국문헌정보학회지
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• 제36권1호
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• pp.41-60
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• 2002

본 연구에서는 호서대학교 전자도서관 웹사이트를 대상으로 하여 웹사이트 사용성 평가도구를 이용한 분석(Doctor HTML 및 Web Site Garage)을 적용하여 웹브라우즈의 호환성 및 접속속도를 분석하였고, 온라인 설문조사를 실시하여 네비게이션, 기능성, 이용자의 통제, 언어 및 컨텐츠, 시스템 및 이용자 피드백, 일관성, 구조적 및 시각적 명료성 등의 주요 속성에 관한 분석 및 평가를 통하여 문제점 및 개선방안을 도출하였다. 그리고 분석 및 평가결과를 반영하여 사용성에 기반한 우리나라 대학의 전자도서관 웹사이트 구축에 적용할 수 있는 일반적 지침을 제시하였다.

• 정보처리학회논문지C
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• 제16C권3호
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• pp.299-306
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• 2009

인터넷의 사용이 증가하면서 다양한 네트워크 접근 기술이 개발 되었다. Extensible Authentication Protocol (EAP)은 네트워크 접근 시 요구되는 인증 과정을 지원하는 프로토콜이다. EAP는 다양한 인증 기법을 지원할 수 있는 확장성과 유연성 때문에 대부분의 네트워크 환경에서 사용되고 있다. 그러나 EAP의 가장 핵심적인 특성인 "lock-step" 흐름 제어는 에러 복구, 재전송 메커니즘에 영향을 주어 EAP는 물론 전체 인증과정의 성능을 크게 저하 시킨다. 본 논문은 EAP의 성능 저하 효과를 분석하고 새로운 흐름 제어 방식을 제안한다. NS-2를 사용한 시뮬레이션 결과에 따르면 제안한 흐름 제어 방식을 적용한 EAP는 최대 53% 성능 향상을 기대할 수 있다.

• Advances in environmental research
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• 제6권1호
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• pp.35-51
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• 2017

The use of Granular Activated Carbon (GAC) and naturally occurring silica (Sand) as filtration media in water and waste water treatment systems is very common. While GAC offers the additional functionality of being an "adsorptive" filter for dissolved organics it is also more expensive. In this paper we present an experimental evaluation of the performance of a bed of GAC for colloid removal and compare the same with that from an equivalent bed of Sand. The experiments are performed in an "intermittent" manner over extended time, to "simulate" performance over the life of the filter bed. The experiments were continued till a significant drop in water flow rate through the bed was observed. A novel "deposition" and "detachment" rate based transient mathematical model is developed. It is observed that the data from the experiments can be explained by the above model, for different aqueous phase electrolyte concentrations. The model "parameters", namely the "deposition" and "detachment" rates are evaluated for the 2 filter media studied. The model suggests that the significantly better performance of GAC in colloid filtration is probably due to significantly lower detachment of colloids from the same. While the "deposition" rates are higher for GAC, the "detachment" rates are significantly lower, which makes GAC more effective than sand for colloid removal by over an order of magnitude.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2019년도 학술발표회
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• pp.412-412
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• 2019

Nature-based solutions (NBS) offer a wide variety of techniques that promote cost-efficient stormwater management practices. In particular, low impact development facilities utilize NBS principles to restore the ecosystem services in a highly-urbanized area. Despite the advancements in these technologies, several considerations should still be addressed to ensure optimum functionality and attainment of desired pollutant removal efficiency a LID facility. This study evaluated the mass flushing characteristics of pollutants in an urban catchment and the efficiency of a small constructed wetland (SCW) in treating urban stormwater runoff. 21 rainfall events from 2010 to 2018 were monitored to determine and quantify stormwater pollutants. The highest pollutant washoff was observed on rainfall depths ranging from 0.1mm to 10mm, whereas events with greater rainfall depths exhibited lower pollutant concentrations due to dilution effect. However, the SCW manifested lower pollutant-removal performance on rainfall depths exceeding 10mm due to the exceedance of the facility's design rainfall. This study is beneficial in assessing the dynamics of pollutant washoff and efficiency of LID facilities subjected under various external factors.