• Proceedings of the Korean Information Science Society Conference
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• 1999.10b
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• pp.425-427
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• 1999

본 논문에서는 시간 간격을 두고 활영한 흉부의 단순 x선 영상의 차영상을 이용하여 컴퓨터 도움 진단에 활용할 수 있는 방법에 대해 연구하였다. 시간 간격을 두고 촬영한 흉부 단순 x선 영상의 차영상은 시간에 따른 변화를 명확히 보여줌으로써 질병의 조기진단 및 질병의 전개과정 등을 알아보는데 유용하게 쓰일 수 있다. 특히, 이 방법은 폐암과 같이 조기진단이 매우 어려운 질병에 대하여 정기검진 등에서 정기적으로 촬영한 단순 x선 영상을 이용하여 조기진단을 할 수 있는 방법으로 활용될 수 있다. 그러나, 촬영시의 여러 가지 조건들, x선의 세기와 조영시간, 환자의 촬영 자세 및 호흡 상태 등에 따라 단순 x선 영상이 크게 달라져 단순한 뺄셈에 의한 차영상은 진단에 도움이 되지 못한다. 진단에 도움을 주기 위해서는 두 영상 사이의 전체적인 밝기와 대조도를 맞추고 늑골, 쇄골 등 해부학적 구조물의 위치와 크기를 서로 맞추어 차영상을 얻는 영상처리 방법이 필요하다. 또한, 폐의 크기와 위치도 서로 맞추어 차영상을 얻어야 한다. 그러나, 이러한 방법도 늑골과 폐의 크기와 위치 변화가 서로 일치하지 않는 문제점을 가지고 있다. 본 논문에서는 이러한 영상처리를 통하여 차영상을 얻는 방법에 대하여 논하고 방법상의 문제점과 해결 방법을 제시한다.

• The Optical Journal
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• s.119
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• pp.97-97
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• 2009

제 18회 '2009 서울국제사진영상기자재전(PHOTO&IMAGING 2009)'이 오는 4월 9일부터 12일까지 4일 동안 서울 코엑스 본관 1층 태평양 홀에서 개최된다. 전시주최자 사무소에서는 현재 1차 조기신청에 이어 올해 1월 15일까지 2차 조기신청을 받는다. 조기신청 업체는 참가비 할일뿐 아니라 부스위치 우선 배정 등 다양한 혜택이 돌아가며 중소기업의 경우 약 15%의 추가할인의 혜택이 있다.

• Journal of the Korean Applied Science and Technology
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• v.38 no.2
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• pp.368-377
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• 2021

The present study aimed to evaluate the effects of radiation mutant Perilla frutescens var. crispa and Atractylodes macrocephala Koidzumi complex extract(Perilla frutescens var. crispa complex extract) on the mediators related to degenerative arthritis in a monosodium iodoacetate-induced rat model of degenerative arthritis. Perilla frutescens var. crispa complex extract was administered orally at doses of 25, 50 or 100 mg/kg/day for 2 weeks before direct injection of monosodium iodoacetate (3 mg/50 µl of 0.9% saline) into the intra-articular space of the rats' right knees. The rats subsequently received the same doses of oral Perilla frutescens var. crispa complex extract for another 4 weeks. It was evaluated that the treatment effects based on serum bio-markers, and morphological and histopathological analysis of the knee joints. Compared with those in negative control rats, the Perilla frutescens var. crispa complex extract treatments significantly reduced the serum levels of inflammation, bone metabolism markers (i.e., TNF-α, MMP-3, COX-2, PGE₂, COMP, and Aggrecan). Otherwise, it was significantly increased the production of CTX-2 in cartilage absorption mediators. In addition, the Perilla frutescens var. crispa complex extract treatments effectively preserved the knee cartilage and synovial membrane. As a result, it indicates that the Perilla frutescens var. crispa complex extract improved degenerative arthritis symptoms. Thus, the Perilla frutescens var. crispa complex can be used in food material for the management of degenerative arthritis.

• Journal of Gifted/Talented Education
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• v.16 no.2
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• pp.143-166
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• 2006

On the basis of exploration for the effect of grade skipping and early graduation on socio-emotional adjustments of early college entrants, this study sought to present educational and counseling implications for the promotion of efficiency in practicing grade skipping and early graduation. Fifty-two students were asked to report their IQs and GPAs and to respond the Self-Esteem Inventory(Coopersmith, 1967, 1981, 1984) and the Attitude toward Schooling Scale(Lee & Lee, 2000). The data collected were analyzed by MANOVA and MANCOVA. On the contrary to concern for socio-emotional development of early entrants, the result indicated that there was not any statistically evidence to show the differences in socio-emotional adjustments between early entrants and the counterparts in the K University. However, there were significant group differences in attitude toward schooling(e,g,. the opportunities and informations for grads skipping and early graduation).

• Environmental and Resource Economics Review
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• v.32 no.2
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• pp.107-126
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• 2023

This study analyzes the financial efficiency of the early scappage support system using the benefit and cost analysis. To do so, we use comprehensive administrative data on the early scrappage of old diesel vehicles. The result shows that the benefit-cost ratio was greater than 1 before 2020, but it appeared to be less than 1 after 2020. This indicates that despite recent reforms to increase the subsidy of early scrappage of old diesel vehicles, the rate of the benefit of air quality improvement is not as fast as the increase in system operation cost of this system. The benefit of air quality improvement depends on how much the operating period is shortened due to early scrappage support system. The earlier this period is brought forward, the more likely it is that the benefits of early scrappage will exceed the costs. Upon examining the results of this study, it was found that when the scrappage timing is brought forward by 5 years, the B/C for 98% of the samples becomes 1, greatly securing financial efficiency. Therefore, it is important for the government to reform the system so that it can influence the decision of old diesel vehicle owners on the timing of scrappage.

• Journal of Nutrition and Health
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• v.43 no.4
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• pp.367-373
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• 2010

The present study was to investigate anti-oxidative and anti-inflammatory activity of Perillae semen in RBL-2H3 basophilic leukemia cells. Inhibitory effect of Perillae semen onto free radical generation was determined by measuring DPPH and hydroxyl radical scavenging activities in vitro. Anti-inflammatory actions of Perillae semen extracts (100, 250, $500\;{\mu}g/mL$) were assessed by testing their effects on the degranulation of mast cells. For this, $\beta$-hexosaminidase released from RBL-2H3 cells was used and proinflammatory cytokines were measured by an ELISA kit. Our results indicated that Perillae semen water extracts effectively inhibited free radical generation. At the concentration of $500\;{\mu}g/mL$ of water extract, the degranulation of RBL-2H3 cells were inhibited by 42.1%. The IgE-antigen complex increased the accumulation of IL-4 and TNF-$\alpha$ secretion in RBL-2H3 cells and treatments with 250 and $500\;{\mu}g/mL$ of Perillae semen extracts suppressed the IgE induced secretion of IL-4 and TNF-$\alpha$ protein by 20.5, 26.9% and 14.5, 16.5% respectively. We observed that Perillae semen water extract reduced $\beta$-hexosaminidase, IL-4, and TNF-$\alpha$ secretion in RBL-2H3 cells. These results provide that Perillae semen may be beneficial in the treatment of allergic inflammatory disease.

• Journal of Life Science
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• v.20 no.1
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• pp.119-123
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• 2010

Genetic variations of Chajogi (Perilla frutescens var. crispa) germplasms were investigated by using RAPD markers. Twenty-two Perilla frutescens var. crispa lines collected from various locations were subjected to RAPD analysis using 80 primers. Among them, only 22 primers showed polymorphic bands and these 22 primers provided a total of 224 bands consisting of 127 polymorphic and 97 monomorphioc bands. The polymorphic bands were subjected to phylogenetic analysis using the UPGMA method. From UPGMA, similarity co-efficiency of 22 Chajogi lines ranged from 0.72 to 0.94. The dendrogram of 22 lines obtained through the UPGMA method resulted in two groups (one major group and one minor group). Although the two groups were roughly consistent with growth phenotypes (period of flowering, period of maturity, stem length, number of branches, number of nodes, number of flower clusters and number of ovaries) in detail, much inconsistency also was present

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.23 no.1
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• pp.47-63
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• 2012

The purpose of this study is to improve the faceted navigation function of next-generation library catalogs(NGC) using the tables in a classification scheme. Because the tables provide forms or contents of materials systematically, faceted navigation based on the tables can be as effective as faceted navigation based on language, publishing date, or class-level subject facet. Therefore, class numbers based on the Korean Decimal Classification (KDC) were examined and the characteristics of schedules and tables were analyzed. As a result, suggestions to improve faceted navigation was provided. Moreover, the method using the tables does not need additional resources to derive facets because the facet analysis process is always carried out in the classification process.

• Korean Journal of Food Science and Technology
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• v.41 no.1
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• pp.100-105
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• 2009

This study investigated the physiological characteristics of various medicinal plant extracts including Crataegi Fructus (CF), Perilla frutescens Britton var. acuta Kudo (PF), Geranium thunbergii sieb. et Zucc. (GT) and Polygonum multiflorum Thunberg (PM) for use in extending the shelf-life and improving the functional properties of seasoned pork. CF and GT showed a wide spectrum of antimicrobial activities against 5 kinds of Gram (+) bacteria and 5 kinds of Gram (-) bacteria. The antimicrobial activities of the extracts decreased as the heat treatment temperature increased between 60 and $121^{\circ}C$, but their activities remained relatively high following heat treatment. The total phenolic compound contents of the CF, PF, GT, PM extracts were 66.2, 29.0, 96.6 and 13.3 mg/g, respectively. The order of their DPPH radical scavenging activity was GT > CF > PF > PF. The nitrite scavenging activities of the CF, PF and GT extracts at 0.1% concentration were 10.5, 1.6 and 3.8%, respectively. The GT extract (99.7%) showed the highest degree of lipid rancidity inhibition compared to CF (90.3%), PF (88.9%) and PM (41.2%). After heat treatment for 15 min at $121^{\circ}C$, the DPPH radical scavenging activity of CF decreased but it increased in GT and PM. The nitrite scavenging activities of CF and GT decreased after heat treatment for 15 min at $121^{\circ}C$ but remained at relatively high levels. Also, degrees of lipid rancidity inhibition remained relatively high in PF (86.3%) and GT (99.8%) after heat treatment for 15 min at $121^{\circ}C$. These results suggest that CF and GT extracts could be used as ingredients in seasoning sauce to improve the shelf-life and functional properties of seasoned pork.

• Journal of Digestive Cancer Research
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• v.3 no.1
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• pp.35-38
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• 2015

62-year-old patient who had past history of endoscopic submucosal dissection for early gastric cancer at September 2008, underwent endoscopic submucosal dissection of esophagus for early esophageal cancer at mid esophagus during health screening service. Because there was a high risk of lymph node metastasis at biopsy results, concurrent chemoradiotherapy was added to endoscopic submucosal dissection. There was a metachronous cancer at mid-esophagus at March 2013. He underwent endoscopic mucosal resection and photodynamic therapy. Concurrentchemoradiotherapy after endoscopic submucosal dissection is an effective treatment method.