• 접착 및 계면
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• 제19권2호
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• pp.84-94
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• 2018

Electrically debonding adhesives[EDA], one of the controlled delamination materials[CDM] is reviewed. CDM can be defined as the ability to separate adhesive bonded assemblies without causing damage to the substrates. Its application includes electronics, medical surgery, dentistry, building and general manufacturing where the opportunity to separate assemblies is important. There are several important mechanisms of EDAs; faradaic reaction, phase separation and anode detachment, cathodic debonding, gas emission mechanism, and mechanical stresses. These mechanisms are reviewed with various research results. Since the mechanism behind the electrochemical debonding of adhesives is not well understood, this review aims to help the research scientists in the industries. Finally, new applications of EDA are introduced as new business opportunity.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2020년도 추계학술발표대회
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• pp.810-813
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• 2020

자연어처리 분야에서 딥러닝 기반의 분류 모델은 획기적인 성능을 보여주고 있다. 특히 2018 년 발표된 구글의 BERT 는 다양한 태스크에서 높은 성능을 보여준다. 본 논문에서는 이러한 BERT 가 클래스 불균형이 심한 데이터에 대해 어느 정도 성능을 보여주는지 확인하고 이를 해결하는 방법으로 EDA 를 선택해 성능을 개선하고자 한다. BERT 에 알맞게 적용하기 위해 다양한 방법으로 EDA 를 구현했고 이에 대한 성능을 평가하였다.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2023년도 제68차 하계학술대회논문집 31권2호
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• pp.535-536
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• 2023

본 논문에서는 대학교 교내 식당의 실제 데이터를 사용해 식사 인원 예측 모델을 개발하여 교내식당에서 발생하는 적자, 음식 품절, 대량 잔반 발생을 경감 시키고자 한다. 모델 개발에 사용되는 데이터는 2018년도, 2019년도 학기 중 식당 데이터와 기상청 날씨 데이터를 사용하였다. 2018년도, 2019년도 데이터를 이용해 EDA 분석 및 전처리를 통해 필요한 변수를 추출하였다. 전체 데이터의 70%를 기반으로 GridSearch와 XGBoostRegressor를 사용해 평일과 주말에 대한 식사 인원 예측 모델을 생성하였다. 그리고 나머지 데이터의 30%를 사용해 생성한 두 모델의 성능을 평가한다. 평일 식사 인원 예측 모델에 대한 MAE값이 조식 16명, 중식 23명, 석식 25명으로 준수한 결과를 보였고 주말 식사 인원 예측 모델에 대한 MAE값은 조식 16명, 중식 23명, 석식 25명으로 좋은 성능을 보였다.

• 한국산학기술학회논문지
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• 제13권2호
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• pp.934-940
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• 2012

소리쟁이 에탄올 추출물의 환원력, 전자공여능, 산화안정도 등 항산화활성과 소리쟁이 분말에 의한 수중의 Pb(II)와 Cd(II)의 흡착성능을 측정하였다. 추출액의 고형분 함량에 의한 추출율은 추출조건에 따라 1.9~3.0%로서 추출용매비가 낮을수록, 추출온도가 높을수록 증가하였고, 환원력과 전자공여능은 용매비에 반비례하고 추출온도에 비례하였으며, 20배의 용매비와 $75^{\circ}C$의 온도에서 추출물의 환원력과 전자공여능은 ascorbic acid의 86.4%와 91%에 각각 대응되었다. 옥수수 배아 식용유에 대한 추출물의 산화안정성은 실험 조건에 따라 합성 항산화제인 BHT의 86~91.3%의 성능을 보였다. 그리고 소리쟁이에 의한 중금속 흡착능은 Cd(II)보다 Pb(II)가 훨씬 높았으며, 흡착시간 60분에서 초기 농도 20ppm의 경우 Pb(II)의 흡착률은 88%이었으며, Cd(II)는 Pb(II)의 92%정도로 나타났다.

• 원예과학기술지
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• 제28권4호
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• pp.696-700
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• 2010

국내외에서 유통되고 있는 로즈마리 정유 31점을 수집하여 GC통한 유효성분분석과 항산화 활력시험을 실시하였다. 주요 성분은 ${\alpha}$-pinene, camphene, ${\beta}$-pinene, 1.8-cineol, verbenone 및 borneol 등이 동정되었다. 주요성분에 따라 생산국별로 함량의 차이가 나타났으며, 프랑스 원산 정유의 품질이 우수하였고, 국내에서 재배하여 추출한 정유가 ${\alpha}$-pinene과 camphene의 함량이 높았다. ISO가 제시한 9가지 성분의 함량을 충족하는 제품은 총 31점 중 5점(16%)으로 낮았다. 전자공여능(EDA)은 4.8-96.0%로 현저한 차이를 보였으며, 60%이상의 항산화능 활력을 갖는 정유는 13%였다. 특정 성분 함량에 따른 항산화 활력정도의 차이는 일치하지 않았으며, 스위스 원산의 정유에서 가장 높은 항산화 활력을 보였다.

• Food Science and Biotechnology
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• 제16권5호
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• pp.822-827
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• 2007

The aroma characteristics and antioxidative activity of volatile compounds in heat-treated garlic (Allium sativum L.) were evaluated. The garlic was heated to various temperatures (100, 110, 120, and $130^{\circ}C$) for different lengths of time (1, 2, and 3 hr). The volatile compounds of heated garlic were extracted by simultaneous steam distillation extraction (SDE). Aroma compound profiles were analyzed by gas chromatography/mass spectrometry (GC/MS) and antioxidative activity was measured by 2,2-diphenyl-2-picrylhydrazyl (DPPH) assay and 2,2'-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) cation decolorization assay. The major aroma compounds were sulfur compounds such as dimethyl disulfide, 2-propen-1-ol, methyl-2-propenyl disulfide, dimethyl trisulfide, diallyl disulfide, methyl-2-propenyl trisulfide, and di-2-propenyl trisulfide. DPPH radical scavenging activity (EDA, %) and the ascorbic acid equivalent antioxidant activity (AEAC) of volatile compounds in heated garlic increased significantly with the increase of temperature and time (p<0.001). The EDA (%) and AEAC of raw garlic were 26.8%/10 mg garlic and 39.05 mg ascorbic acid equivalent per g sample. After heat treatment, the highest values were 40.50%/10 mg garlic for EDA (%) and 46.43 mg ascorbic acid equivalent per g sample for ABTS.

• 대한본초학회지
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• 제30권4호
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• pp.29-35
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• 2015

Objectives : The objective of this research was to investigate the antibacterial and antioxidant activities of bio-fermented Sanguisorbae Radix extract.Methods : The Sanguisorbae Radix extract was fermented byStreptococcus thermophilus,and their products was tested for antibacterial activity against pathogenic microorganisms namely,Bacillus cereus,Bacillus subtilis,Staphylococcus aureus,Escherichia coli,Vibrio parahaemolyticusandSalmonella typhimuriumby paper disc diffusion method and the antioxidant activities of extract was evaluated by five different assays as electron donating ability(EDA), superoxide dismutase(SOD)-like activity, polyphenol, flavonoid contents and nitrite scavenging ability.Results : The bio-fermented Sanguisorbae Radix extract was safe from heat. Antibacterial activity of fermented Sanguisorbae Radix extract appeared relatively highly againstBacillus cereusandStaphylococcus aureusand didn't show any difference. EDA in comparison to Vitamin C showed over 90% activity at about the same time of Sanguisorbae Radix extract expressed highly. SOD activity showed 15% in fermentation before and after. The nitrite scavenging ability of Sanguisorbae Radix extract before and after fermentation showed higher numerical value over 70% in pH 2.5 than that of butylated hydroxytoluene(BHT). But SOD activity, EDA and nitrite scavenging ability were not different between the Sanguisorbae Radix extract before and after fermentation. Total polyphenol content expressed over about 20 mg/g, and that of the Sanguisorbae Radix extracts was increased than that of the fermented Sanguisorbae Radix extracts.Conclusions : The results suggest the usefulness of developing functional materials using antioxidant active Sanguisorbae Radix extract was fermented bySalmonella typhimuriumwith high polyphenol contents and nitrite scavenging ability.

• 한국정보통신설비학회:학술대회논문집
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• 한국정보통신설비학회 2009년도 정보통신설비 학술대회
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• pp.157-161
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• 2009

In recent years, there is a remarkable progress in ICTs (Information and Communication Technologies), and then many attempts to apply ICTs to other industries are being made. In the field of disaster managements, ICTs such as RFID (Radio Frequency IDentification) and USN (Ubiquitous Sensor Network) are used to provide safe environments. Actually, various types of early warning systems using USN are now widely used to monitor natural disasters such as floods, landslides and earthquakes, and also to detect human-caused disasters such as fires, explosions and collapses. These early warning systems issue alarms rapidly when a disaster is detected or an event exceeds prescribed thresholds, and furthermore deliver alarm messages to disaster managers and citizens. In general, these systems consist of a number of various sensors and measure real-time stream data, which requires an efficient and rapid data processing technique. In this study, an event-driven architecture (EDA) is presented to collect event effectively and to provide an alert rapidly. A publish/subscribe event processing method to process simple event is introduced. Additionally, a complex event processing (CEP) technique is introduced to process complex data from various sensors and to provide prompt and reasonable decision supports when many disasters happen simultaneously. A basic concept of CEP technique is presented and the advantages of the technique in disaster management are also discussed. Then, how the main processing methods of CEP such as aggregation, correlation, and filtering can be applied to disaster management is considered. Finally, an example of flood forecasting and early alarm system in which CEP is incorporated is presented It is found that the CEP based on the EDA will provide an efficient early warning method when disaster happens.

• 생물환경조절학회지
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• 제17권2호
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• pp.110-115
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• 2008

돌나물 수집종간 생육특성과 비타민 C함량 및 항산화활성을 비교하기 위하여, 13 지역종을 포장에 삽목재배하였다. 금산, 부천, 용인, 포천 지역종은 줄기가 가늘고 초장이 길며, 잎은 좁고 긴 타원형으로 다른 지역종들과 형태적 차이를 보였으며, 완주와 군산 지역 종은 초장과 절간장이 짧고, 개화기에도 꽃이 피지 않았다. 비타민 C 함량은 $407.8-434.4mg{\cdot}kg^{-1}$의 범위로 광양, 부안, 완주, 군산 지역종에서 높았으나, 수집종간 유의한 차이는 보이지 않았다. 항산화 활성을 나타내는 전자공여능(EDA)은 생체추출물($45.0{\sim}66.5%$)에서보다 동결건조 추출물($61.3{\sim}66.5%$)에서 높았으며, 광양, 순천, 완도 지역종들이 다른 지역종에 비하여 높은 항산화 활성을 나타내었다. 비타민 C함량 및 항산화 활성은 광양 지역종에서 가장 높았다.

• 한국식품조리과학회지
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• 제28권1호
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• pp.51-55
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• 2012

This study was conducted to investigate the physicochemical properties of citrus peel extracts with different hot water extraction and enzymatic hydrolysis conditions. Enzymatic hydrolysis was also employed using Viscozyme L and results were compared with that of optimized hot water extract. Hot water extraction was performed under different parameters; the sample to solvent ratio(1:20, 1:15, 1:10), extraction time(2, 4 hrs), extraction temperature(85, $95^{\circ}C$) and enzymatic hydrolysis(0, 1%) and the subsequent extracts were used for determining their physicochemical properties, such as total yield, total phenolics, total flavonoids, and electron donating ability (EDA). With the increase in the sample to solvent ratio and extraction time, total yield, total phenolics, total flavonoids and EDA increased. But extraction temperature did not significantly affect the hot water extract. As hot water extract was hydrolyzed by the enzyme, total yield and active ingredients increased rapidly. In the result of total yield, total phenolics, total flavonoids and EDA, the activity of enzyme-treated extract was higher than those of enzyme-untreated extract. Based upon the overall hot water extraction efficiency, it was found that 20 times volume or 120 min at a time at $95^{\circ}C$ after enzyme treatment was optimal.