• Journal of Ginseng Research
• /
• 제23권2호
• /
• pp.88-92
• /
• 1999

추출 시간을 5시간으로 단축하고, 추출 온도를 $33\~50^{\circ]C$로 설정한 진공력적방식 조건과 $80^{\circ]C$의 고온의 다중단 추출방식 간의 조사포닌 함량비교 결과, 고온의 다중단 추출방법으로 제조한 엑스의 조사포닌 함량이 $8\~9\%$인데 비하여 저온 및 단시간 추출인 진공력적 추출방법은 조사포닌 함량이 $11.5\%$로 $41.9\%$ 높았다. 또한 진공력적 추출방법이 엑스 수득율비교에서도 $13.6\%$ 증가하였다. 향미는 종합적으로 진공력적엑스가 강하였으며 이를 선호하는 경향이었다. 진공력적추출 엑스의 색상은 기존 제품 엑스와 유사하였고 유동성이 좋았다. 진공력적 추출법은 짧은 추출 시간과 공정 자동화로 인건비 감소를 기대할 수 있으며, HPLC 패턴으로 사포닌 분해가 거의 없음을 확인 할 수 있었다.

• Preventive Nutrition and Food Science
• /
• 제1권2호
• /
• pp.179-185
• /
• 1996

Extraction yields of thiosulfinates from garlic were studied by using gas-in-liquis-dispersion(GLD) system to maxmize the thiosulfinate extraction. Extracted thiosulfinates were spectrophotometically quantified using synthesized dially1 thiosulfinate. The conditions for maximum extraction were optimized by response surface methodology. The volatile components extracted by various methods, such as hexane extraction, simultaneous steam distillation and GLD system, were compared by using gas chromatography. The results indicated that the thiosulfinate yield was increased by incresaing temperature and nitrogen gas flow rate, while the effects of bubble sizes on thiosulfinate extraction were not significant at the ranges tested. Application of GLD system resulted in extraction of more volatile components than other extraction methods, Therfore, it was suggested that GLD system was one of the efficient extraction methods among the ever introduced ones, for thiosulfinate extraciton.

• 한국해양공학회지
• /
• 제25권1호
• /
• pp.8-13
• /
• 2011

A compact array system of small buoys is used for wave energy extraction. To evaluate the performance of this system, hydrodynamic analysis is carried out in regular waves using the higher order boundary element method. The motion response of each buoy is calculated considering hydrodynamic interactions caused by other buoys. The effect of energy extraction device is modeled as a linear damping load. The efficiencies of energy conversion are compared using the various sizes and arrangements of the array system and the damping coefficients for energy extraction. The increase in size or the packing ratio of the system gives better efficiency. However, the wave condition and the cost for the system should be considered to optimize performance from the perspective of engineering and economics. The proposed nondimensionalized damping coefficient for energy extraction is 0.1~0.5.

• Journal of applied mathematics & informatics
• /
• 제40권1_2호
• /
• pp.289-303
• /
• 2022

This article examines the multidimensional index extraction method of the disability social security system based on data mining. While creating the data warehouse of the social security system for the disabled, we need to know the elements of the social security indicators for the disabled. In this context, a clustering algorithm was used to extract the indicators of the social security system for the disabled by investigating the historical dimension of social security for the disabled. The simulation results show that the index extraction method has high coverage, sensitivity and reliability. In this paper, a multidimensional extraction method is introduced to extract the indicators of the social security system for the disabled based on data mining. The simulation experiments show that the method presented in this paper is more reliable, and the indicators of social security system for the disabled extracted are more effective in practical application.

• 한국화재소방학회논문지
• /
• 제20권2호
• /
• pp.72-79
• /
• 2006

본 연구에서는 부분배연설비의 배연효율을 분석하고, 화재시 운영방안을 제시하기 위하여 수치해석을 실시하였다. 해석결과 선행된 실험을 통하여 얻었던 균일댐퍼의 배연효율 및 연기의 단면분포에 의한 성층화 결과는 서로 일치하는 경향을 얻을 수 있었다. 균일댐퍼의 운영방안은 화재시 화재 근방의 댐퍼만을 개방하였을 경우가 터널내 모든 댐퍼를 개방하였을 경우에 비하여 약 7%의 배연효율이 증가됨을 보였다. 또한, 터널내 차량이 정체시 화재가 발생할 경우 승객의 안전한 대피를 위한 부분배연설비의 정량적인 운전방안을 제안하였다.

• 한국식품영양과학회지
• /
• 제28권2호
• /
• pp.409-416
• /
• 1999

Microwave extraction system equipped with closed vessels was applied to confirm its capability of extracting ginseng solubles including saponin, which was monitored to optimize extraction con ditions by response surface methodology. Total yield increased with the decrease in particles size and more extraction steps. Soluble components were completely extracted by operating the system within 6 min per one step, which should be repeated by 3 or 4 times. Optimized conditions for maxi mum extraction of response variables(total yield, crude saponin) were 40~50% of ethanol concentration, about 140oC of extraction temperature, and within 6 min of the extraction time. The extraction effi ciency of total yield was dependent on the decrease of ethanol concentration, while crude saponin content was favored on the higher degree of ethanol concentration. According to the temperature guideline, below 90oC of extraction temperature, the optimal ranges of extraction conditions were predicted as 30~50% of ethanol concentration and 2.5~6.5 min of extraction time. Estimated values of total yield and crude saponin were in good agreement with experimental values.

• Journal of Information Science Theory and Practice
• /
• 제2권1호
• /
• pp.6-21
• /
• 2014

This paper proposes a novel knowledge extraction system, TAKES (Two-step Approach for Knowledge Extraction System), which integrates advanced techniques from Information Retrieval (IR), Information Extraction (IE), and Natural Language Processing (NLP). In particular, TAKES adopts a novel keyphrase extraction-based query expansion technique to collect promising documents. It also uses a Conditional Random Field-based machine learning technique to extract important biological entities and relations. TAKES is applied to biological knowledge extraction, particularly retrieving promising documents that contain Protein-Protein Interaction (PPI) and extracting PPI pairs. TAKES consists of two major components: DocSpotter, which is used to query and retrieve promising documents for extraction, and a Conditional Random Field (CRF)-based entity extraction component known as FCRF. The present paper investigated research problems addressing the issues with a knowledge extraction system and conducted a series of experiments to test our hypotheses. The findings from the experiments are as follows: First, the author verified, using three different test collections to measure the performance of our query expansion technique, that DocSpotter is robust and highly accurate when compared to Okapi BM25 and SLIPPER. Second, the author verified that our relation extraction algorithm, FCRF, is highly accurate in terms of F-Measure compared to four other competitive extraction algorithms: Support Vector Machine, Maximum Entropy, Single POS HMM, and Rapier.

• 전자공학회논문지A
• /
• 제29A권1호
• /
• pp.48-59
• /
• 1992

This paper presents the design of a layout processing system that performs circuit and symbolic extraction from hierarchical designs containing arbitrarily shaped layout. The system is flexible enough to deal with various technologies, MOS or bipolar, by providing extraction rules in the form of technology files. In this paper, new efficient algorithms for trapezoidal decomposition of polygon and symbolic path extraction using trapezoidal template are proposed for symbolic extraction. Circuit and symbolic extractor is developed as an integrated design environment of SOLID system.

• 한국식품저장유통학회지
• /
• 제6권3호
• /
• pp.324-327
• /
• 1999

추출 시간을 5시간으로, 추출 온도를 33-5$0^{\circ}C$로 설정한 진공역적방식 조건과 8$0^{\circ}C$의 고온의 다중단 추출방식 간의 조사포닌 함량비교 결과, 고온의 다중단 추출방법으로 제조한 흥삼엑스의 조사포닌 함량이 8.1-8.2%인데 비하여, 저온 및 단시간 추출인 진공역적 추출방법은 조사포닌 함량이 5.4-5.9%로 조사포닌 함량은 낮은 반면에 사포닌 Rg$_1$ 및 Re의 분해가 거의 없는 것으로 나타났다. 또한 진공역적 추출방법이 다중단 추출방식보다 수율에서도 15-20% 높은 경향을 나타내었다. 진공역적추출 엑스의 색상은 기존 다중단 추출 방식으로 추출된 엑스와 유사하였고, 유동성은 보다 향상된 것으로 나타났다.

• 한국지하수토양환경학회:학술대회논문집
• /
• 한국지하수토양환경학회 2004년도 임시총회 및 추계학술발표회
• /
• pp.227-230
• /
• 2004

Two extraction techniques, Ultrasonic and Microwave extraction method, were tested for the determination of arsenic in contaminated soil SRM (Montana Soil). The extraction mixture was prepared by mixing 1 M ortho-phosphoric acid and 0.1 M ascorbic acid. This extractant was known to preserve arsenic species. The appropriate extraction time was 10 min to 20 min and the recovery rate was about 80%. A coupled system, SPE-HG-ICP-AES, was used for the determination of inorganic arsenic species. The detection limit was around 2 $\mu\textrm{g}$/1 and the linearity of calibration curve was better than $R^2$=0.99.