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제주도 주변 용승역의 생물생태학적 기초연구 (Ⅰ) - 제주도 남서부 연안해역의 해수화학적 특성과 용승현상
강태연(Tae Youn KANG),최영찬(Young Chan CHOI),고유봉(You Bong GO) 한국수산과학회 1996 한국수산과학회지 Vol.29 No.5
Hydrographic conditions (temperature, salinity, dissolved oxygen), nutrients, chlorophyll-a and suspended solid have been studied in the southwestern coastal area of Cheju Island from April 1993 to March 1994. Vertical profile of temperature, salinity and chemical properties (nutrients, chlorophyll-a) distribution in th southwestern sea of Cheju Island showed a upwelling feature. Although it was not clear in winter season, it seems to continued through out the year. In the surface water at the upwelling areas, the ranges of dissolved oxygen, nitrate, phosphate and silicate was 3.30∼8.43 ㎖/ℓ, 0∼7.12 ㎍/ℓ, 0.03∼1.75 ㎍-at/ℓand 2.75∼22.32 ㎖-at/ℓ, respectively. Nutrients was higher in the shore water than in the offshore water, because sufficient supply of nutrients from the bottom water by coastal upwelling. In November, especially high concentration silicate was observed at all the stations and depth in the study area. At all station of bottom water (down to the depth of 60 meter), concentration value of dissolved oxygen was as high as 8 ㎖/ℓ. Mean values of N/P was 8.0, lower than Redifield ratio of 16. The mean values of Si/P was observed to 46.3 in southwest of Cheju Island. Concentration of chlorophyll-a was in the range of 0.04∼2.36 ㎍/ℓ. Concentration of chlorophyll-a in surface water at all station was especially higher in spring than in other seasons. Mean concentration value of suspended solids was 3.14 ㎎/ℓ(0.75∼8.47 ㎎/ℓ). Ratio of the volatile suspended solids to the suspended solids was higher in the inshore water (53%) than in the offshore water (46%), and higher in the surface water than in the bottom water.
퍼지전문가 시스템을 이용한 미세 혈액형 진단시스템 개발
강태연(Taeyun Kang),이승재(Seung-Jae Lee),김용구(Yonggoo Kim),이규형(Gyoo-Whung Lee),조동우(Dong-Woo Cho) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
ABO typing is the first test done on blood when it is tested for transfusion. The automated machines in hospitals are typically supersized and the process is complicated. In this paper, we present intelligent micro-blood typing system including two parts: single-line micro blood typing device and fuzzy expert system for grading strength of agglutination. Blood and antibody serum are mixed in the micro mixer and agglutination occurs in the chamber. Then fuzzy expert system determines the degree of agglutination from images of agglutinated blood. The single-line micro blood typing device was fabricated by microstereolithography. The blood typing experiments were successfully done on this device and the fuzzy expert system shows grading decision reflecting the expert's expectations
이정현(Lee, Jeonghyeon),강소리(Kang, Sori),강태연(Kang Taeyeon),최지영(Choi, Jiyoung),박영재(Park Youngjae),김지영(Kim, Jiyoung) 충북대학교 생활과학연구소 2020 생활과학연구논총 Vol.24 No.1
The purpose of this study is to provide examples of design planning which can satisfy the various tastes and needs of consumers through developing fashion designs that combine storytelling and kidults, and that are easy to link in emotional terms. A literature study was conducted in relation to storytelling and kidult fashion, and analyzed the theoretical elements and types of storytelling, as well as looking at the definition of “kidult fashion” and cases thereof. Based on the theoretical analysis, the storytelling of “The town musician of Bremen” was analyzed, and five representative scenes were selected according to stages of plot, a component of storytelling. The design was developed to present lively, diverse kidult fashion designs, which were planned according to two contrasting concepts. Concept One, “A Dark Dream”, utilizes motifs developed in Scenes One and Three, and is a kidult-like pattern, but uses achromatic colors as its main color scheme, an expression found in modern everyday wear. Concept Two, Ride a Balloon , utilizes Scenes Two, Four and Five and uses pink, red and pastel shades as the main colors to emphasize humor and kidult fashion s vivacious and energetic side. Using Adobe Photoshop and Adobe Illustrator, two patterns were developed per scene, with motifs representing the main elements of that scene. Using the patterns thus developed, two color schemes were deployed and implemented in a virtual outfit with 3D mapping, which is presented as the final result.
골조직 재생을 위한 마이크로 기둥 패턴의 3 차원 생체적합 구조체 개발
차황도(Hwang Do Cha),강태연(Tae Yun Kang),홍정민(Jung Min Hong),정진우(Jin Woo Jung),조동우(Dong-Woo Cho) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
To achieve successful bone tissue regeneration, various attempts have been tried to fabricate novel scaffolds which provide a proper environment for cells growth. Recently, solid freeform fabrication (SFF) technologies were in the spotlight as a way of controlling scaffold architecture such as pore size, porosity and inner/outer geometry. In this study, an NSTL (nano-stereolithography) system, one of the SFF technologies, was utilized to fabricate a novel structure which affects pre-osteoblast cell adhesion by offering micron-scaled pillar pattern on every layer. As pre-osteoblast cells were seeded on the pillar patterned surface, the cells had a tendency to migrate actively towards the adjacent pillars. As a result of patterned surface, the cell behaviors were shown with activated performance after 1day incubation. In conclusions, the scaffold with micro-pillar pattern on each layer has great potential for improving cell adhesion, compared to normal scaffold with flat surface.
마이크로 광 조형 기술을 이용한 연골조직 재생용 3차원 인공지지체 개발
이승재(Seung-Jae Lee),강태연(Taeyun Kang),박정규(Jung Kyu Park),이종원(Jong-Won Rhie),한세광(Sei Kwang Hahn),조동우(Dong-Woo Cho) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
Conventional methods for fabricating three-dimensional (3-D) scaffolds have substantial limitations. In this paper, we present 3-D scaffolds that can be made repeatedly with the same dimensions using a microstereolithography system. This system allows the fabrication of a pre-designed internal structure, such as pore size and porosity, by stacking photopolymerized materials. The scaffolds must be manufactured in a material that is biocompatible and biodegradable. In this regard, we synthesized liquid photocurable biodegradable TMC/TMP, followed by acrylation at terminal ends. And also, solidification properties of TMC/TMP polymer are to be obtained through experiments. Cell adhesion to scaffolds significantly affects tissue regeneration. As a typical example, we seeded chondrocytes on two types of 3-D scaffold and compared the adhesion results. Based on these results, the scaffold geometry is one of the most important factors in chondrocyte adhesion. These 3-D scaffolds could be key factors for studying cell behavior in complex environments and eventually lead to the optimum design of scaffolds for the regeneration of various tissues, such as cartilage and bone.
투영 기반 마이크로 광 조형 장치에서 복잡한 형태의 인공지지체 제작을 위한 알고리즘의 개발
정진우(Jin Woo Jung),강현욱(Hyun-Wook Kang),강태연(Tae-Yun Kang),박정훈(Jeong Hun Park),조동우(Dong-Woo Cho) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
Projection-based microstereolithography (pMSTL) offers the advantage of increased fabrication speed compared with a line-scan-based MSTL by creating 2-D patterns with single-section image exposure and then stacking them. To fabricate a complex 3-D structure for a target tissue (liver, blood vessel, etc.) using the pMSTL system, we introduce a new algorithm that automatically generates projection image information. The procedure uses the STL file format as the raw data for a 3-D model. First, the STL file data are converted into slicing data composed of closed loops, including layer thicknesses. Projection image data are then generated from the closed loops calculated during the slicing process. Finally, the projection image data are converted into pixel information. The proposed technique is evaluated by fabricating a complex 3-D vascular network structure, and is shown to be quite practical for automated fabrication of complex 3-D structures in tissue engineering.