서브 - 링의 신드롬 분석을 이용한 하이퍼큐브 진단 알고리즘

김학원(Hak-Won Kim),김동군(Dong-Kun Kim),최문석(Moon-Seok Choi),이충세(Chung-Sei Rhee) 한국정보과학회 2001 한국정보과학회 학술발표논문집 Vol.28 No.2Ⅰ

하이퍼큐브의 정규직이며 계층적인 구조적 특성은 효율적인 진단 알고리즘 개발에 유리하게 적용될 수 있다. Feng et al.의 HADA/IHADA와 Choi와 Rhee의 적응적 큐브 분할 방법은 하이퍼큐브의 전체 노드를 하나의 링으로 임베딩하여 링의 진단 특성을 이용하여 위하여 분할 및 정복 방법을 이용하였다. 또한 Kranakis와 Pelc는 결함을 모두 포함하는 최소의 서브링을 하나의 노드로 하는 하이퍼큐브의 형태로 분할하는 HYP-DIAG 알고리즘을 제안하였다. 또한 최악의 경우에, 테스트 수만을 고려하여 2ⁿ+3n/2의 테스트 수를 갖는 FAST-HYP-DIAG 알고리즘과 병렬 시간만을 고려하여 많아야 11테스트 라운드 이내에 진단을 수행하는 EXPRESS-HYP-DIAG 알고리즘을 제안하였다. 본 논문에서는 HYP-DIAG의 첫 번째 단계에서 얻어진 서브링들의 신드롬을 분석하여 테스트의 수와 테스트 라운드를 모두 고려하는 알고리즘을 제안한다.

한방 닭죽 개발 및 최적 배합비율 확립

김경연 ( Kyung Yeon Kim ),백무열 ( Moo Yeol Baik ),박천석 ( Cheon Seok Park ),최성원 ( Sung Won Choi ),김창남 ( Chang Nam Kim ),김병용 ( Byung Yong Kim ) 한국식품영양학회 2013 韓國食品營養學會誌 Vol.26 No.1

죽의 기능성 향상을 위하여 2:1:1:1의 배합으로 혼합한 한약재료(가시오가피, 숙지황, 산약, 백복령)와 닭가슴살 등의 재료를 사용해 한방 영양죽을 제조하였다. 한방 닭죽의 DPPH radical 소거능, SOD 유사활성, 맛의 선호도, cost는 수학적인 canonical model과 trace plot을 이용하여 분석한 결과, SOD 유사활성 이외에는 각 성분들이 독립적으로 작용하여 상호작용이 없는 선형 모델을 보여주었다. DPPH radical 소거능, SOD 유사활성, 맛의 선호도를 최대로, cost를 최소로 목적 범위를 설정하고, 각각의 canonical 계수를 이용하여 수적 최적화를 통하여 최적 배합비를 구한 결과, 한약 혼합물 101g, 닭가슴살 38.66g, 찹쌀 비율 41.34g의 최적 배합비를 구하였으며, 이 배합비에 따른 맛의 선호도는 6.39, DPPH radical 소거능은 17.25㎎VCE/ℓ, SOD 유사활성은 2.25%, cost는 1,382.39 won으로 나타났으며, 여러 결과들 사이에 최적화된 한 값에 수렴하는 desirability는 0.714로 나타났다. 이는 한약혼합물이 많을수록 기능성 면에서는 높게 나타나지만 맛의 선호도면에서는 낮게 나타냈고, 닭가슴살의 경우에도 그 함량이 많을수록 맛의 선호도는 올라갔지만 그에 반해 cost가 높게 올라간 것을 반영한 결과로 사료된다. The objectives of this study were to develop porridge with medicinal herbs and chicken breast meat and to find out the optimum mixing ratio. Several herb extracts such as Acanthopanacis senticosus, Rehmannia glutinosa, Disocorea japonica, and Poria cocos Wolf were used in the ratio of 2, 1, 1, and 1, respectively. The optimum processing condition for herbal chicken porridge was determined by a design expert program. Seventeen experimental points were selected, and herb extracts (82∼101g), chicken breast meat (30∼50g), and glutinous rice (40∼60g) were chosen as the independent variables. The measured responses were preference of taste, DPPH radical scavenging, SOD-like activity, and cost. The optimum formulation of herbal chicken porridge using the numerical analysis was set at herbal extracts (101g), chicken breast meat (38.66g), and glutinous rice (41.34g) with a 0.714 desirability value. DPPH radical scavenging effect, preference of taste and the cost showed a linear model, whereas SOD-like activity showed a quadratic model indicating a higher interaction among the mixture. As a result of proximate composition of optimized herbal chicken porridge, the contents of moisture, carbohydrate, crude protein, crude lipid, and ash contents were 76.4, 9.0, 1.4, 0.5, and 1.6%, the calories of the porridge was 46.1kcal/100g.

Effects of Repeated Seafood Consumption on Urinary Excretion of Arsenic Species by Volunteers

Choi, Byung-Sun,Choi, Seong-Jin,Kim, Dong-Won,Huang, Mingai,Kim, Na-Young,Park, Kyung-Su,Kim, Choong-Yong,Lee, Hyo-Min,Yum, Young-Na,Han, Eui-Sik,Kang, Tae-Seok,Yu, Il-Je,Park, Jung-Duck Springer-Verlag 2010 Archives of environmental contamination and toxico Vol.58 No.1

Patterns of ischemic injury on brain images in neonatal group B Streptococcal meningitis

Choi, Seo Yeol,Kim, Jong-Wan,Ko, Ji Won,Lee, Young Seok,Chang, Young Pyo The Korean Pediatric Society 2018 Clinical and Experimental Pediatrics (CEP) Vol.61 No.8

Purpose: This study investigated patterns of ischemic injury observed in brain images from patients with neonatal group B Streptococcal (GBS) meningitis. Methods: Clinical findings and brain images from eight term or near-term newborn infants with GBS meningitis were reviewed. Results: GBS meningitis was confirmed in all 8 infants via cerebrospinal fluid (CSF) analysis, and patients tested positive for GBS in both blood and CSF cultures. Six infants (75.0%) showed early onset manifestation of the disease (<7 days); the remaining 2 (25.0%) showed late onset manifestation. In 6 infants (75%), cranial ultrasonography showed focal or diffuse echogenicity, suggesting hypoxic-ischemic injury in the basal ganglia, cerebral hemispheres, and periventricular or subcortical white matter; these findings are compatible with meningitis. Findings from magnetic resonance imaging (MRI) were compatible with bacterial meningitis, showing prominent leptomeningeal enhancement, a widening echogenic interhemisphere, and ventricular wall thickening in all infants. Restrictive ischemic lesions observed through diffusion-weighted imaging were evident in all eight infants. Patterns of ischemic injury as detected through MRI were subdivided into 3 groups: 3 infants (37.5%) predominantly showed multiple punctuate lesions in the basal ganglia, 2 infants (25.0%) showed focal or diffuse cerebral infarcts, and 3 infants (37.5%) predominantly showed focal subcortical or periventricular white matter lesions. Four infants (50%) showed significant developmental delay or cerebral palsy. Conclusion: Certain patterns of ischemic injury are commonly recognized in brain images from patients with neonatal GBS meningitis, and this ischemic complication may modify disease processes and contribute to poor neurologic outcomes.

Cure depth control for complex 3D microstructure fabrication in dynamic mask projection microstereolithography

Choi, Jae-Won,Wicker, Ryan B.,Cho, Seok-Hyun,Ha, Chang-Sik,Lee, Seok-Hee Emerald Group Publishing Limited 2009 RAPID PROTOTYPING JOURNAL Vol.15 No.1

<B>Purpose</B> - The paper's aim is to explore a method using light absorption for improving manufacturing of complex, three-dimensional (3D) micro-parts with a previously developed dynamic mask projection microstereolithography (MSL) system. A common issue with stereolithography systems and especially important in MSL is uncontrolled penetration of the ultraviolet light source into the photocrosslinkable resin when fabricating down-facing surfaces. To accurately fabricate complex 3D parts with down-facing surfaces, a chemical light absorber, Tinuvin 327™ was mixed in different concentrations into an acrylate-based photocurable resin, and the solutions were tested for cure depths and successful micro-part fabrication. <B>Design/methodology/approach</B> - Tinuvin 327 was selected as the light absorber based on its high absorption characteristics (~0.4) at 365?nm (the filtered light wavelength used in the MSL system). Four concentrations of Tinuvin 327 in resin were used (0.00, 0.05, 0.10, and 0.15 percent (w/w)), and cure depth experiments were performed. To investigate the effects of different concentrations of Tinuvin 327 on complex 3D microstructure fabrication, several microstructures with overhanging features such as a fan and spring were fabricated. <B>Findings</B> - Results showed that higher concentrations of Tinuvin 327 reduced penetration depths and thus cure depths. For the resin with 0.15 percent (w/w) of the Tinuvin 327, a cure depth of ~30?µm was achieved as compared to ~200?µm without the light absorber. The four resin solutions were used to fabricate complex 3D microstructures, and different concentrations of Tinuvin 327 at a given irradiance and exposure energy were required for successful fabrication depending on the geometry of the micro-part (concentrations of 0.05 and 0.1 percent (w/w) provided the most accurate builds for the fan and spring, respectively). <B>Research limitations/implications</B> - Although two different concentrations of light absorber in solution were required to demonstrate successful fabrication for two different micro-part geometries (a fan and spring), the experiments were performed using a single irradiance and exposure energy. A single solution with the light absorber could have possibly been used to fabricate these micro-parts by varying irradiance and/or exposure energy, although the effects of varying these parameters on geometric accuracy, mechanical strength, overall manufacturing time, and other variables were not explored. <B>Originality/value</B> - This work systematically investigated 3D microstructure fabrication using different concentrations of a light absorber in solution, and demonstrated that different light absorption characteristics were required for different down-facing micro-features.

Auto Plants Growing Embedded System Design Using Wireless Sensor Networks

Won-Hyuck Choi,Min-Seok Jie 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.4

Recent development in the areas of information and communication detonated the emergence of a new paradigm of ubiquitous and smart environment. A ubiquitous environment is a technology that the computer and communication are to control and monitor all the matters without human’s direct involvement in control. So this paper purports to explain about the general installation method and the efficacy and how to use the monitor and control system in the growing environment by using the wireless sensor network technology, and to design and propose the smart farming system with convenience and easiness to use even in the narrow environments.

Dimensional crossover of polaron dynamics inNb:SrTiO3/SrTiO3superlattices: Possible mechanism of thermopower enhancement

Choi, Woo Seok,Ohta, Hiromichi,Moon, Soon Jae,Lee, Yun Sang,Noh, Tae Won American Physical Society 2010 Physical review. B, Condensed matter and materials Vol.82 No.2

Effects of Kokja as a Fermentation Starter on Sponge-and-Dough Bread Properties

Choi, In-Duck,Choi, Won-Seok The Korean Society for Applied Biological Chemistr 2010 Applied Biological Chemistry (Appl Biol Chem) Vol.53 No.1

Kokja, referred to Nuruk (Korean Koji), was used as a fermentation starter for sponge-and-dough breads. Sponge prepared with wheat flour, water and Kokja was fermented, and the fermented sponge at 0 h (FS0), 8 h (FS8), 16 h (FS16) and 24 h (FS24) was added to dough mixture. A significant pH decrease from 6.01 to 4.50 in sponge is closely related to the increased lactic acid bacteria viable cells of 2.9, 3.1, and 3.6 (log cfu/g) in FS8, FS16, and FS24, respectively. An increase in $CO_2$ content was observed in the dough with FS16, consistently increasing $CO_2$ production up to 90 min of dough fermentation. The bread with FS16 appeared to be high in loaf volume and medium in bread firmness. Adding the longer fermented sponge in bread dough resulted in blighter color on the bread crumb. Sensory ratings on overall acceptance were higher for the breads with FS0 and FS16, indicated as there was no significant difference statistically.

Synthesis and Fungicidal Activity of N-[4-(4-Fluoro)phenyl-2-piperidin-4-ylthiazol-5-yl]pyrimidin-2-yl-N-phenylamines on Phytophthora capsici

Choi, Won-Sik,Nam, Seok-Woo,Ahn, Eun-Kyung,Park, Byeoung-Soo,Lee, Sung-Eun,Kim, Tae-Jun,Choi, In-Young The Korean Society for Applied Biological Chemistr 2010 Applied Biological Chemistry (Appl Biol Chem) Vol.53 No.2

The fungicidal activities against phytopathogenic fungi of two aminothiazole compounds of N-[4-(4-fluoro)phenyl-2-aminothiazol-5-yl]pyrimidin-2-yl-N-subst. phenylamine (V-1, V-2) have been determined and these two compounds were used as the leading compounds in this study as V-1 for N-[4-(4-fluoro)phenyl-2-aminothiazol-5-yl]pyrimidin-2-yl-N-(3-hydroxymethyl)phenylamine and V-2 for N-[4-(4-fluoro)phenyl-2-aminothiazol-5-yl]pyrimidin-2-yl-N-3-(1-hydroxyethyl)phenylamine. Further syntheses of these two compounds, V-1 and V-2, were conducted by reacting them with three functional groups, 2-(N-ethoxycarbonyl)piperidin-4-yl, 2-piperidin-4-yl, and 2-(N-methyl)-piperidin-4-yl-thiazole. From this scheme, 21 compounds were newly synthesized and their structures were confirmed by $^1H$-NMR-spectrum. The fungicidal activities of all the synthesized compounds against Phytophthora capsici were examined using the whole plant method. While the $EC_{50}$ value of the commercial fungicide dimethomorph was 4.26 mM, that of IX-3g on P. capsici was 1.03 mM. Among the 21 chemicals, IX-3g showed the most potential antifungal activity in vivo. Therefore, IX-3g may be considered as a potential candidate for the control of phytopathogenic diseases characterized by P. capsici infection, and further studies will be conducted on the mode of action IX-3g.

A Case Study on Development and Operation of Plagiarism Detection System in Korea and Abroad

Won-Kyun Joo,Yong-Ju Shin,Ki-Seok Choi 한국콘텐츠학회 2012 한국콘텐츠학회 종합학술대회 논문집 Vol.2012 No.12