• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.747-750
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• 2011

최근 에너지와 자원 절약 사업의 일원으로 차세대 전력 관리 시스템인 스마트 그리드에 대한 관심이 증가하고 있다. 스마트 그리드는 전력 공급자와 소비자 사이에 통신망을 기반으로 한 양방향 전력 공급 방식을 말한다. 스마트 그리드를 통하여 전력 공급자는 소비자의 전력 사용량에 따른 탄력적인 전력 생산 및 공급이 가능하고, 소비자는 자신의 소비 패턴을 통한 효율적 전력 소비를 할 수 있다. 하지만 사이버 공격에 대한 위협이 높아지면서 공용망을 기반으로 운용되는 스마트 그리드 운용 정보에 대한 보안요구사항이 증가하고 있다. 이에 본 논문에서는 소비자 전력 사용량, 전력 사용 패턴 등의 정보가 송수신되는 지능형검침인프라의 보안 위협을 분석하고, 이를 해결하기 위한 방안을 제안한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.04a
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• pp.866-868
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• 2011

최근 스마트폰이 빠르게 보급됨에 따라 스마트폰을 이용하여 웹페이지에 접속하는 경우가 증가하고 있다. 따라서 많은 중소사이트와 대형 포털사이트 역시 모바일에 최적화된 형태의 서비스를 제공하기 위해 추가적으로 스마트폰용 모바일 웹페이지를 개발하고 있다. 하지만 스마트폰용 모바일 웹페이지는 보안에 대한 인식이 부족하여 개인정보가 쉽게 노출될 수 있다는 문제점을 가지고 있다. 이에 본 논문에서는 현재 가장 널리 사용되고 있는 모바일 웹페이지에 대한 보안 취약점을 분석하여, 사용자의 개인정보가 노출되는지 확인하였다. 또한 모바일 웹페이지의 문제점을 개인정보보호 관점에서 분석하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.05a
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• pp.510-512
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• 2007

이기종의 다양한 컴퓨터 시스템과 네트워크 장비 그리고 소프트웨어가 서로 혼재되어 있는 오늘날의 IT 환경을 효과적으로 관리하기 어려워짐에 따라 기업은 막대한 총 소유비용을 지출하고 있다. 이러한 상황을 효과적으로 대처하기 위하여, 분산 이기종 환경에서 플랫폼 독립적인 동시에 기술 중립적인 방법으로 시스템 자원을 감시, 통제, 조정하기 위한 표준 기술이 DMTF 를 중심으로 활발하게 개발되고 있다. 본 논문에서는 소형 단말기를 포함한 수많은 정보기기가 모두 네트워크로 연결되는 유비쿼터스 환경에서의 표준화된 시스템 관리를 가능케 하는 경량 CIM 서버가 가져야 할 요구사항을 도출하기 위해 현재 가장 대표적인 CIM 서버 솔루션을 중심으로 그 특징을 분석한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.05a
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• pp.297-300
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• 2007

Due to its impressive compression performance, the H.264 video coder is highlighted in the video communications industry, such as DMB (Digital Multimedia Broadcasting), PMP (Portable Multimedia Player), etc. The main bottleneck to use the H.264 coder lays in the computational complexity, i.e. five times more complex than the market leading MPEG-4 Simple Profile codec. In this paper, we propose the hierarchical mode decision method for intraframe coding for the reduction of the computation complexity of the encoder. By determining the mode group early, the propose algorithm can skip the computationally demanding computation in the mode decision. The proposed algorithm is composed of three steps: $16{\times}16$ mode decision, $4{\times}4$ mode-group decisions, and final mode decision among the selected mode group. The simulation results show that the proposed algorithm achieves 20% to 50% reduction in the computational complexity compared with the conventional algorithm.

• Journal of the Korean Society of Food Science and Nutrition
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• v.41 no.3
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• pp.333-338
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• 2012

The effects of ethanol extract from leaves of Eleutherococcus senticosu were evaluated on hyperlipidemic rats. Male SD rats were divided into a normal group, control (AIN-76 diet) group, Garcinia cambogia extract group, and AIN-76 diet group supplemented with ethanol extract from Eleutherococcus senticosu (EEES). The body weight of the AIN-76 group increased, whereas those of the Garcinia and EEES groups decreased. The serum total cholesterol of the AIN-76 group increased by 28.36% compared to the normal group, but decreased by only 27.15% in the Garcinia group and 25.47% in the EEES group. The serum triglyceride level of the AIN-76 group increased by 35.04% compared to the normal group, but decreased by only 26.76% in the Garcinia group and 37.54% in the EEES group. The serum HDL-cholesterol levels of the Garcinia and EEES groups increased compared to that of the AIN-76 group. The liver and epididymal adipose tissue weights of the EEES group decreased compared to those of the AIN-76 group. In measuring the concentration of triglycerides and total cholesterol level in the liver extracts, the AIN-76 group showed significant increases compared to the normal group, whereas the Garcinia and EEES groups showed a significant decrease compared to the AIN-76 group. These results indicate that the EEES group may improve lipid metabolism and reduce fat accumulation and body weight.

• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2006.09a
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• pp.517.2-517.2
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• 2006

• Journal of the Korean Society of Food Science and Nutrition
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• v.40 no.10
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• pp.1411-1416
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• 2011

In this study, we investigated the anti-obesity activity of Aceriphyllum rossii ethanol extract on rat fed a high fat diet. Male SD rats were divided into four groups. Group 1 was the control. Group 2 was fed a high-fat diet. Group 3 was the positive control, fed a high-fat diet supplemented with Garcinia Cambogia extracts. Group 4 was fed a high fat diet supplemented with ethanol extracts of Aceriphyllum rossii (EEAR). Precisely 166 mg/kg of powdered Garcinia Cambogia extracts was used for Group 3. Also, 250 mg/kg of EEAR was used for Group 4. The Body weight increased Group 2, but decreased Group 4. The serum total cholesterol in Group 2 increased by 15.26% when compared to Group 1, but only increased 5.29% in Group 3 and 4.29% in Group 4. The liver and mesenteric adipose tissue weights of Group 2 increased compared to Group 1, whereas they decreased in Group 3 and Group 4. As a result of measuring the concentration of triglycerides in extracted livers, Group 2 showed a significant increase compared to the Group 1, and Groups 3 and 4 showed significant decrease compared Group 2. These results suggest that Aceriphyllum rossii ethanol extracts may be useful as an anti-obesity agent.

• Korean journal of food and cookery science
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• v.6 no.4 s.13
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• pp.85-97
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• 1990

This study is carried out to understand and analyze the cooking and processing methods presented in the CHE MIN YO SUL-Chinese books of husbandary-written in sixth century that composed of two part (agricultural production and product-utilization). Especially Ouja, Po, Suk, Keng, Hak, Jeung and Bu written in part II which studied this time. There are Eight kinds of Ouja, seven kinds of Po and Suk, Twentynine kinds of Keng and Hak, Sixteen kinds of Jeung and Bu. Ouja is something like Korean Kajamisikhae which cooked with fresh fish, dried fish, pork, rice and then seasoned. Po is a dried slice beef, poultry and fish with seasoned, Suk is a dried in original shape with seasoned. These are something like Korean dried beg, dried fish and Amchipo. Keng is a clear soup and Hak is a boiled muddy soup with cereal. Jeung is a steamed beef, poultry, fish in the earthenware steamer and Bu is a roasted in the copper pan.

• Food Science of Animal Resources
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• v.33 no.6
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• pp.723-729
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• 2013

In this study, the quality characteristics due to the influence of various thawing methods on electro-magnetic and air blast frozen beef were examined. The loin and round of second grade Hanwoo were sliced into 5-7 cm thickness and packed with aerobic packaging. The packaged beef samples, which were frozen by air blast freezing at $-45^{\circ}C$ and electro-magnetic freezing at $-55^{\circ}C$, were thawed by 4 thawing methods with refrigeration ($4{\pm}1^{\circ}C$), room temperature (RT, $25^{\circ}C$), cold water ($15^{\circ}C$), and microwave (2450 MHz). These samples were thawed to the point, which were core temperature reached $0^{\circ}C$. Analyses were carried out to determine drip and cooking loss, water holding capacity (WHC), moisture contents and sensory evaluation. Frozen beef thawed by microwave indicated a lower drip loss (0.66-2.01%) than the other thawing methods (0.80-2.50%). Cooking loss after electro-magnetic freezing indicated 52.0% by microwave thawing for round compared with 41.8% by refrigeration, 50.1% by RT, and 50.8% by cold water. WHC thawing by microwave with electro-magnetic freezing didn't showed any difference depending on the thawing methods, while moisture contents was higher thawing by microwave with electro-magnetic freezing than refrigeration (71.9%), RT (75.0%), and cold water (74.9%) for round. The texture of sensory evaluation for round thawed by microwave result was the highest than refrigeration (4.7 point), RT (6.4 point) and cold water (6.6 point), while sensory evaluation was no significant difference. Therefore, it was shown that microwave thawing is an appropriate way to reduce the deterioration of meat quality due to freezing.

• Resources Recycling
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• v.13 no.5
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• pp.28-36
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• 2004

The extraction of platinum group metals such as Pt, Pd and Rh from spent automobile catalyst has been investigated by leaching in HCl solutions using $HNO_3$ or NaOCl as a oxidant. The effect of type and amount of oxidant, reaction time and pulp density on the extraction of platinum group metals was examined. Platinum group metals were recovered by the cementation method using aluminum as a reducing agent. The extraction ratio was higher when NaOCl was used as a oxidant. The optimum leaching conditions were obtained to be: HCl 8 M, the amount of NaOCl 1.4 mole, leaching temperature $90^{\circ}C$, leaching time 180 minutes, pulp density 400g/L. Under the optimum conditions, the extraction of Pt, Pd and Rh were 96.1%, 93.6% and 77.3%, respectively. With the addition of 2.0g of aluminum which corresponds to 28 equivalent the reduction were 98% for Pt. 98.8% for Pd and 65.3% for Rh, respectively.