• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2006.09a
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• pp.101-102
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• 2006

Processing techniques for producing microcellular silicon carbide, mullite, and cordierite ceramics have been developed by a reaction method that incorporates a polysiloxane and reactive fillers. The techniques developed in this study offer substantial flexibility for producing microcellular ceramics whereby cell size, cell density, degree of interconnectivity, composition, and porosity can all be effectively controlled. It is demonstrated that the adjustment of filler composition enables the possibility of tailoring the composition and properties of the microcellular ceramics. The present results suggest that the proposed novel processing techniques are suitable for the manufacture of microcellular ceramics with high morphological uniformity.

• Journal of Food Hygiene and Safety
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• v.31 no.6
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• pp.399-405
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• 2016

The objective of this study was to determine the effect of sakso 2 corn kernels and cobs extracts on antioxidant activity in rats fed a high fat-cholesterol diet (HFC) for 2 weeks. 48 male Sprague-Dawley (4-weeks-old) were randomly divided into 6 groups: normal diet (N), HFC (C), HFC and 0.05% kernel extracts of Saekso 2 (T1), HFC and 0.25% kernel extracts of Saekso 2 (T2), HFC and 0.05% cob extracts of Saekso 2 (T3), HFC and 0.25% cob extracts of Saekso 2 (T4). The weight gain in all treatment groups were significantly lower and the food efficiency ratio (FER) in all treatment groups except T3 were lower than C group. Liver index (liver weight/100 g body weight) in N group and T2 were significantly lower than C group. The level of total cholesterol in plasma of N group and T2 were significantly lower than C group and HDL-cholesterol in plasma of N group and T2 were significantly lower than C group. Malondialdehyde (MDA) concentration of thiobarbituric acid reactive substances in N group, T3 and T4 were significantly lower than C group. Activity of catalase (CAT) in all treatment groups were lower than C group. These result suggest that saekso 2 corn kernels and cobs extracts may reduce oxidative damage through the activation of antioxidative defense systems in rats fed high fat-cholesterol diets.

• The Journal of Korean Academy of Sensory Integration
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• v.17 no.2
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• pp.31-40
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• 2019

Purpose : The purpose of this study was to compare the difference between preterm infants and toddlers (PT) and full-term infant and toddler (FT) of sensory processing ability, feeding as well as investigate the correlation of sensory processing ability with feeding of preterm infants and toddlers. Methods : The subjects of a study were 107 including 51 PT and 56 FT. Infant/Toddler Sensory Profile 2 (ITSP 2) was used to assess sensory processing ability. The Behavioral Pediatrics Feeding Assessment (BPFAS) was used to assess feeding behavior. The collected data were analyzed by using SPSS 21.0. Independent sample t-test was used in order to compare the difference between PT group and FT group. Pearson correlation analysis was used in order to investigate the correlation of sensory processing ability with feeding of preterm infants and toddlers. Results : There was a significant difference in sensory sensitivity and oral sensory processing between with PT group and FT group (p<0.05). There was a significant difference in feeding behavior between with PT group and FT group (p<.05). In PT group, there are positive correlations of sensory avoidance (r=.443) and sensory sensitivity (r=.374) with feeding frequency. General behavior (r=.390) and oral sensory processing (r=.513) showed a positive correlation with feeding frequency. In addition, oral sensory processing (r=.529) showed a positive correlation with feeding problem. Conclusion : It is proved that the interrelationship of sensory processing ability with feeding and of preterm infants and toddlers. And it is meaningful to recognize significance of sensory processing characteristics to comprehend feeding and of preterm infants and toddlers.

• The Journal of Korean Academy of Sensory Integration
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• v.17 no.2
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• pp.18-30
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• 2019

Objective : The purpose of this study was to investigate the effect of Ayres's sensory integration (ASI) intervention on the sensory processing ability and motor development in children with Developmental Delay. Methods : 9 children in the experimental group and 8 children in the control group participated in this study for Developmental Delay children aged 3-5 years. For research tool, the Short Sensory Profile (SSP), Peabody Developmental Motor Scale-2 (PDMS-2) are used. In the experimental group, individual sensory integration therapy according to principle of ASI was performed for twice a week, 40 minutes, and 16 times for 8 weeks. Methods for the data analysis included Mann Whitney U test, Chi-square test, Wilcoxon's signed rank test, Cohen's d test of SPSS 24.0. Results : In the ASI Intervention group, the sensory processing ability showed statistically significant difference in total score, movement sensitivity, auditory filtering and low energy/weak compared to the control group without ASI intervention (p<.05). In the ASI Intervention group, the motor development showed statistically significant difference in Gross Motor Quotient, Fine Motor Quotient and Total Motor Quotient compared to the control group without ASI intervention (p<.05). Conclusions : In this study, ASI intervention had a positive effect on the sensory processing and motor development in children with Developmental Delay.

• Journal of the Korean Society of Food Science and Nutrition
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• v.2 no.1
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• pp.35-40
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• 1973

Though many papers have reported the nutrition value of Chlorella their results are all different because of the differences in processing method. To investigate its processing and nutrition value we provided the white rats with the Chlorella that were treated with boiling methanol. The results obtained in this investigation are summarized as follows: Two groups. which were fed with 20% Chlorella protein and 10% Chlorella plus 0.37% $_{DL}-methionine$ gained less weight than the 10% egg protein group but equaled the 20% egg protein group in weight gain. The digestion rates calculated from ordinary N-balance method were 83.6% for 20% Chlorella, 81.7% for 10% Chlorella, and 84.9% for 10% Chlorella plus methionine group. This value is lower than 20% Egg (93.8%) and 10% Egg group (89.6%) Biological values from this method were 78.3% for 20% Chlorella and 79.1% for 10% Chlorella group, being lower than 20% Egg (85.2%), 10% Egg (93.2%). But the biological value of 10% Chlorella group was markedly enhanced to 92.2%, a value comparable to that of 10% Egg group, by adding methionine.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.11a
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• pp.735-738
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• 2006

전자화폐가 안전하게 널리 사용되기 위해서는 여러 가지 특성을 만족해야 한다. 그러한 특성 중에서 데이터의 손실이나 분실에 따른 피해를 막기 위한 복구가능성과 사용자의 전자화폐 사용 내역과 같은 정보를 보호하기 위한 불추적성은 서로 충돌하는 특성으로 동시에 달성하는 것이 매우 어렵다. 기존에 제안된 전자회폐 시스템에서는 이 문제를 해결하는 과정에서 해쉬함수를 사용하였으나, 해쉬함수의 충돌회피성 때문에 실제로 구현하여 사용하는데 문제가 있다. 본 논문에서는 이에 대한 해결 방안을 제시하여 좀 더 효율적으로 구현 가능한 전자화폐 시스템을 제안한다.

• Journal of the Optical Society of Korea
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• v.7 no.3
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• pp.160-164
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• 2003

Materials processing by ultrashort pulsed laser is actively being applied to micromachining technology due to its advantages with regard to non-thermal machining. In this study, materials processing with ultrashort pulses was studied by using the high repetition rate of a 800 nm Ti:sapphire regenerative amplifier. This revealed that the highly precise micromachining of metallic thin film and bulk glass with a minimal heat affected zone (HAZ) could be obtained by using near damage threshold energy. Grooves with diffraction limited sub-micrometer width were obtained with widths of 620 nm on Cr thin film and 800 nm on a soda-lime glass substrate. The machined patterns were investigated through SEM images. We also phenomenologically examined the influence of variations of parameters and proposed the optimal process conditions for microfabrication.

• The Transactions of the Korea Information Processing Society
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• v.6 no.11S
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• pp.3379-3389
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• 1999

Important network application services have been rapidly increased along with the growth of the Internet. So, it is desirable for such applications to serve transparently, continuously and safely even if the network is temporally disconnected or certain hosts running those services are crashed down. To satisfy such requirementes, many group communication systems have been developed; but, those systems restrict its range within a single LAN or directly interconnected LAN environments since the communication through the Internet is too slow and too unreliable to support group communication. As of now, it is expected the Internet is going to e sufficiently fast and reliable in the near communication system, named FACE(Java Advanced Communication Environment), supporting Extended Virtual which is a basic communication layer, RPGS(Reliable Process Group Service) which manages application process groups, and JACE API for developing Java application services and clients programs. In addition, an experimental replicated object space is developed as an application of the JACE system.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.04a
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• pp.1183-1184
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• 2017

라즈베리파이와 같은 경량 시스템이 보급되면서, 기존의 서버 중심의 분석 기법에서 경량 시스템에서 경량/순간 분석을 하고, 누적/중량 분석은 서버에서 수행할수 있는 계층적 협업 분석에 대한 연구를 진행하고 있으며, 이를 통해 IoT Thing을 논리적으로 묶어서 Cloud of Things과 같이 센서 데이터 수집/처리를 용이하게 하기 위해 구현된 계층적 협업 분석 SW에 대한 시험 검증 사례에 대한 연구 내용을 담고 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.11a
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• pp.1199-1202
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• 2005

텔레매틱스는 차량내의 무선 통신을 이용하여 텔레매틱스 서비스 센터(TSP)로부터 차량 단말를 통해 차량과 운전자에게 유용한 다양한 정보 및 서비스를 제공한다. 하지만 텔레매틱스 단말 장치는 온도, 잡음 등 열악한 차량 환경에서도 운용할 수 있는 특수한 임베디드 시스템으로 구성되어 있다. 또한 그 시스템에 맞는 전용S/W플랫폼으로 구성됨으로써 텔레매틱스 컨텐츠간의 상호 운용성이 보장되지 못하는 실정이다. 본 논문에서는 텔레매틱스 기술 개발 과제의 일환으로 개발된 텔레매틱스 단말 응용 미들웨어를 소개한다. 이 미들웨어는 개방형 기술인 자바를 기반으로 하여 컨텐츠간 상호 운용성을 보장하고, 컨텐츠 개발을 용이하게 하기 위해 표준화된 인터페이스를 제공한다.