• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.5A
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• pp.649-656
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• 2008

The enhancement of the service life of damaged or cracked structures is a major issue for researchers and engineers. The hierarchic void element based on the integrals of Legendre polynomials is used to characterize the fracture behaviour of unpatched crack as well as repaired crack with bonded composite patches by computing the stress intensity factors and stress contours at the crack tip. Since the equivalent single layer approach is adopted in this study, the proposed element is necessary to represent a discontinuous crack part as a continuum body with zero stiffness. Thus the aspect ratio of this element to represent the crack should be extremely slender. The sensitivity of numerical solution with respect to energy release rate, displacement and stress has been tested to show the robustness of zero stiffness element as the aspect ratio is increased up to 2000. The stiffness derivative method and displacement extrapolation method have been applied to calculate the stress intensity factors of Mode I problem. It is noted that the proposed hierarchical void element can be one of alternatives to analyze the patched crack problems.

• Korean journal of food and cookery science
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• v.17 no.6
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• pp.549-554
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• 2001

Thermal measurements were made for connective tissues of 5 different fish muscles by using a differential scanning calorimeter(DSC), and connective tissues between muscle fibers and the cross sections of muscle fibers were observed by a light microscope. Red sea bream(cultured and wild) and flounder(cultured, cultured with obosan and wild) were used in this study. It was found that the connective tissues of cultured and frozen fish muscle required less endothermic enthalpy and the endothermic peak temperature was lower than those of wild and fresh ones when they were shrunken and denatured. Therefore, it is likely that the former are more unstable to heat than the latter. The cultured flounder fed with obosan and wild flounder which contained more collagen than cultured flounder and the wild red sea bream showed clear connective tissues between fibers. The cross-section of cultured fish muscle fiber was larger than that of wild one. From these results, collagen content and thermal properties of collagen, cross section of muscle fibers seemed to contribute to the textural difference between wild and cultured fish.

• Journal of the East Asian Society of Dietary Life
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• v.16 no.4
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• pp.438-446
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• 2006

The aim of this study was to determine the optimum storage time of flounder and seabream for the preparation of flatfish and sushi. With increasing storage time(0-6 hours) at 4$^{\circ}C$, the moisture, -and fat contents of flounder and seabream flatfish decreased while the total number of bacteria increased. Eicosapentaenoic acid and palmitic acid had the highest content in the flatfish fatty acid composition. The pH of flounder and seabream flatfish both decreased at 4 and 3 hours, respectively, and then increased. With increasing storage time, the hardness and cohesiveness decreased, while the springiness, gumminess,-and chewiness initially increased but then decreased. The rigor mortis increased with increasing storage time and the K values of flounder and seabream flatfish both increased at 4 and 3 hours, respectively, and then decreased, whereas ATP contents decreased and then increased. In the sensory evaluation of sushi, the flounder sushi with flatfish stored for 4 hours and the seabream sushi with flatfish stored for 3 hours were found to be the best making condition.

• The Inventors News
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• no.48
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• pp.1-16
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• 2006

축사/발명 유비쿼터스 선도하는 언론 지향/'발명하는 사람들' 창간 4주년 맞다/'발명하는 사람들' 창간 4주년을 축하합니다/반도체 공정분야 특허 출원 급증/운동화에도 웰빙 바람/공기청정기 특허출원 꾸준한 증가/차세대 반도체 특허, 회로.응용 분야에 집중/맥주, 이제 병이 아닌 플라스틱 용기에/특허고객콜센터, 품질인증 획득/특허청,'찾아가는 특허검색서비스' 제공/직무발명보상 개정법 관련 세미나/'쟁점별 특허소송 가이드북'제작/특허청 연구회, 고객감동 경영의 밑거름/한국특허정보원,2006 한국서비스대상 공공부문 대상 수상/현대차, 특허침해 찾으면 로열티 10% 지급/나이키 짝퉁, 한해 3백60만 켤레 적발/특허청, 자동차부품연구원과 업무협약/휴대용 포토 프린터 특허 출원 증가/역사 속의 발명품/하루 10분 발명교실/특허Q&A/한국여성발명협회 13년 발자취/미니인터뷰/이공계 대학교수 대상 특허정보 세미나 개최/실용신안 등록출원, 우선심사 대상 확대/자료 수집을 소홀히 마라/특허청 간부진, 고객 현장 속으로/삼성, 중국 저명상표로/포스코, 특허시스템 가동/도미다의 원너 커트/월마트, 짝퉁 '펜디' 판매로 망신살/일본, '지적재산권 입국' 계획 마련/미국-유럽연합, 짝퉁 퇴치 나선다/특허청, 자체 브랜드 '특허로' 첫상표출원/인청 부평지식재산센터, 발명가 초청강연회 개최/'2006 피츠버그 국제전' 에서 국내 발명가 수상/세계 최고 4대 건강식품/특허법원, 책 제목 출판사 소유로/한국여성발명협회 회원사 발명품 가이드/'2006년 여대생 발명캠프'/

• Journal of Families and Better Life
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• v.8 no.2
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• pp.69-85
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• 1990

The purpose of this study is to offer basic data for satisfactory marital adjustment and functional communication by investigating marital adjustment, communication style and interrelationship between them, for non-professional working wives. Research was conducted form May, 1089 in Taegu on 470 subjects, who are non-professional working wives as questions and interview. For analysis of data, percentile, frequencies, ANOVA, Scheffe-test, X2-test, t-test were used, and through such research procedure the following major findings were obtained: 1) The marital adjustment of nonprofessional working wives were relatively high with 78 in percentile. 2) Among the related variables, husband's income, job, support and wife's motive of employment, job, age on the marital adjustment and husband's occupation, educational, level, income, the length of marriage and number of children, family style on the communication style have turned out o be significant. 3) Th higher the degree of emotional disclosure and the more open the verbal experesion, the higher the level of marriage adjustment, 4) In communication style, marriage adjustment was found to increase in such order as contactful style, speculative style, conventional style, and controlling style. Such were found to affect significantly marital adjustment.

• Journal of Sensor Science and Technology
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• v.14 no.6
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• pp.387-394
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• 2005

In order to design SOI CMOS image sensors, SOI MOSFET model parameters were extracted using the equation of bulk MOSFET model parameters and were optimized using SPICE level 2. Simulated I-V characteristics of the SOI NMOSFET using the extracted model parameters were compared to the experimental I-V characteristics of the fabricated SOI NMOSFET. The simulation results agreed well with experimental results. A unit pixel for SOI CMOS image sensors was designed and was simulated for the PPS, APS, and logarithmic circuit using the extracted model parameters. In these CMOS image sensors, a nano-wire MOSFET photodetector was used. The output voltage levels of the PPS and APS are well-defined as the photocurrent varied. It is confirmed that SOI CMOS image sensors are faster than bulk CMOS image sensors.

• Proceedings of the Korean Society for Rock Mechanics Conference
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• 2000.09a
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• pp.55-61
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• 2000

For proper sampling of a rock and preparation of specimens, the representative elementary volume (REV) should be determined in rock mechanical test and numerical analysis. Mechanical properties of a rock, in general, would be strongly affected by mineral composition. In this reason REV of Youngju granite is determined by using stereoscopic microscope observation and homogenization numerical analysis. As the area of analysis model exceeds approximately 702 $ extrm{mm}^2$(900 elements), the change of the mineral composition is not observed. The calculated results indicate that Young's modulus is fluctuated with increase of the number of elements in homogenization numerical analysis mesh. However, as the number of elements exceeds 1156 (area of about 900 $ extrm{mm}^2$), Young's modulus does not change apparently.

• Tunnel and Underground Space
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• v.10 no.3
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• pp.309-315
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• 2000

For proper sampling of a rock and preparation of specimens, the representative elementary volume (REV) should be determined in rock mechanical test and numerical analysis. Mechanical properties of a rock, in general, would be strongly affected by mineral composition. In this reason REV of Youngju granite is determined by using stereoscopic microscope observation and homogenization numerical analysis. As the area of analysis model exceeds approximately 702$\textrm{mm}^2$(900 elements), the change of the mineral composition is not observed. The calculated results indicate that Young's modulus is fluctuated with increase of the number of elements in homogenization numerical analysis mesh. However, as the number of elements exceeds 1156 (area of about 900$\textrm{mm}^2$), Young's modulus does not change apparently.

• Korean journal of food and cookery science
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• v.15 no.6
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• pp.639-644
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• 1999

The objective of this study was to compare the quality characteristics of cultured and red sea bream. The color of dorsal muscle was different between wild and cultured red sea bream. Lipid content of the dorsal muscle was higher in cultured fish than in wild one. The contents of moisture and crude protein in cultured fish muscle were almost same as those of wild one. Sensory evaluation of raw fish meat showed that cultured fish had lower preference in appearance, taste and texture than wild one. Especially the texture of cultured raw fish meat had lower preference than wild meat. For cooked fish meat, cultured fish were harder and less juicy than wild fish. These textural differences between wild and cultured meats were confirmed by objective evaluation including the measurements of hardness, springiness, and cohesiveness. Light microscopic observation showed that cultured red sea bream had more lipid in the surface layer near epidermis than wild one. Also more lipid droplet between muscle fibers were observed in cultured red sea bream by SEM.

• Journal of Sensor Science and Technology
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• v.15 no.1
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• pp.1-6
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• 2006

We fabricated Si nano-wire MOSFET by using the conventional photolithography with a $1.5{\mu}m$ resolution. Si nano-wire was fabricated by using reactive ion etching (RIE), anisotropic wet etching and thermal oxidation on a silicon-on-insulator (SOI) substrate, and its width is 30 nm. Logarithmic circuit consisting of a NMOSFET and Si nano-wire MOSFET has been constructed for application to high-sensitivity image sensor. Its sensitivity was 1.12 mV/lux. The output voltage swing was 1.386 V.