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Quad-Subdivision을 이용한 Delaunay 삼각화 알고리즘 개발
박시형,이성수 한국공작기계학회 2000 한국공작기계학회 추계학술대회논문집 Vol.2000 No.-
Delaunay triangulation is well balanced in the sense that the triangles tend toward equiangularity. And so, Delaunay triangulation hasn't some slivers triangle. It's commonly used in various field of CAD applications, such as shape reconstruction, solid modeling and volume rendering. In this paper, an improved Delaunay triangulation is proposed in 2-dimensions. The suggested algorithm subdivides a uniform grids into sub-quad grids, and so efficient where points are non-uniform distribution. To get the mate from quad-subdivision algorithm, the area where triangulation-patch will be most likely created should be searched first.
박시형 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
SF6-filled microbubbles were prepared by emulsion and solventevaporation method. The prepared MBs were further conjugated with doxorubicin-loaded nano-sized liposome and peptide ligands to interleukin-4 receptor for targeting brain tumor cells. The final MB-Lipo (Dox)-IL4RTP had a spherical structure with the mean size of 1,500 nm. The MB-Lipo (Dox)IL4RTP exhibited cellular uptake in U87MG brain tumor cells with frequency ultrasound energy suggesting that MB-Lipo (Dox)IL4RTP provided effective targeting ability for brain tumor cells. In addition, WST-1 assay results showed that MB-Lipo (Dox)IL4RTP inhibited the proliferation of U87MG cells IL4Rdependently. This was confirmed by western blotting of γH2AX, phospho (Ser15)-p53, p53 and p21 which are signal transduction proteins involved in DNA damage response and cell cycle arrest.
박시형,이신원,정귀화,최창훈,이순희,한정훈,김정국,하승우,김보완 대한내분비학회 2001 Endocrinology and metabolism Vol.16 No.4
Autoimmune insulin syndrome is characterized by insulin autoantibody, hyperinsulinemia, and fasting hypoglycemia without previous insulin immunization. This syndrome shows discordant levels between immunoreactive insulin and C-peptide. Negative results of an anatomic study of the pancreas and an inability to reproduce hypoglycemia during a prolonged fast may be helpful in excluding insulinoma. Symptomatic hypoglycemia usually develops during an oral glucose tolerance test. This syndrome is a self-limited disorder. Recently, we experienced one case that developed symptomatic hypoglycemia during both the fasting & oral glucose tolerance test, and another that developed symptomatic hypoglycemia during the oral glucose tolerance test but not the fasting test. Hereby, we present these cases with a review of the literature
Effects of Task Types on Learning Specific Parts of Speech in English
박시형 한국영미어문학회 2022 영미어문학 Vol.- No.145
The purpose of the study is to examine the effects of task types on short-term and long-term retention of vocabulary from different parts of speech. The tasks were L1 summary writing (SW), L1 sentence translation (ST), gap-fill (GF), and comprehension questions (CQ). The subjects were undergraduate students from different departments at a local university. Throughout the experiment period, the subjects took Vocabulary Size Test (VST), performed their respective tasks, and upon completing their task, they were required to take a posttest immediately after their tasks, and the same posttest two weeks later to examine the long-term effect of the tasks on retention of vocabulary from different parts of speech. The result showed that SW group performed significantly better than CQ group for retaining the target vocabulary from all the parts of speech on the immediate posttest. However, the result of the delayed posttest showed that SW group outperformed all the other groups for retaining noun for a longer period of time.
모터사이클 브레이크의 열변형 해석을 위한 지원 프로그램의 개발
박시형,강석현,이성수 한국공작기계학회 2002 한국공작기계학회 춘계학술대회논문집 Vol.2002 No.-
Motorcycle industry, for its competitive position, depends on part design technology. This part design has a bulky amount of data and asks the accumulation of advanced technical skill and experience, and fragmentary technical application is not enough to get to the kernel of a problem. Therefore, the improvement of proper productivity - the starting point of engineering design - and useful Design Methodology for products manufacturing are needed. Thus this paper is aimed to create a program that outputs dynamic characteristics of a vehicle when the data from fully understanding on motorcycle's brake system and induced formula for brake design are inputted.