• International Journal of Computer Science & Network Security
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• 제22권9호
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• pp.149-158
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• 2022

The pandemic of Covid-19 (Coronavirus Disease 19) has devastated the world, affected millions of people, and disrupted the world economy. The cause of the Covid19 epidemic has been identified as a new variant known as Severe Acute Respiratory Syndrome Coronavirus 2(SARS-CoV2). It motives irritation of a small air sac referred to as the alveoli. The alveoli make up most of the tissue in the lungs and fill the sac with mucus. Most human beings with Covid19 usually do no longer improve pneumonia. However, chest x-rays of seriously unwell sufferers can be a useful device for medical doctors in diagnosing Covid19-both CT and X-ray exhibit usual patterns of frosted glass (GGO) and consolidation. The introduction of deep getting to know and brand new imaging helps radiologists and medical practitioners discover these unnatural patterns and pick out Covid19-infected chest x-rays. This venture makes use of a new deep studying structure proposed to diagnose Covid19 by the use of chest X-rays. The suggested model in this work aims to predict and forecast the patients at risk and identify the primary COVID-19 risk variables

• 상하수도학회지
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• 제36권5호
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• pp.275-287
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• 2022

In order to overcome the small scale of Korea waterworks and to achieve comprehensive improvement and innovation transformation, the waterworks integration was reviewed. The effect of consolidation was confirmed by the integration of the water supply business in the southern Gangwon region and the western Gyeongnam region in Korea, such as an increase in the flow rate and a decrease in the production unit cost. After facing management and service limitations overseas, more than 1,000 small-scale waterworks projects in the UK were integrated into 27 waterworks providers, and Japan also revised the Waterworks Act in December 2019 and is in the process of integrating waterworks. It is considered appropriate to promote the integration of waterworks projects in Korea by respecting the autonomy of local governments, but using a participatory method, a win-win method, and a linkage method. For the integration of waterworks projects, three strategies are proposed: First creating a national foundation for integration (revision of the Waterworks Act), Second establishing a waterworks integration strategy led by local governments, Third forming an external consensus and providing incentives for participation.

• 한국식품영양학회지
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• 제36권4호
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• pp.296-308
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• 2023

This study investigated the anti-obesity effects of Coriandrum sativum L. ethanol extracts in a high fat diet-induced obesity model (DIO). We confirmed the anti-obesity effects by analysing the expression of the related proteins, weight gain, dietary intake, dietary efficiency, blood biochemistry, histological analysis and western blot analysis. After oral administration of Coriandrum sativumL. ethanol extracts at concentrations of 250 and 500 mg/kg, a significant improvement in dietary efficiency, reduction in weight gain, triglycerides, total cholesterol and LDL-cholesterol in blood lipid was observed for 8 weeks. In addition, improvement in blood glucose and metabolism confirmed through glucose tolerance test was observed. Further, the concentration of alanine transaminase (ALT) in blood was significantly decreased, which improved the fatty liver caused by high-fat diet intake as confirmed by liver tissue analysis. This phenomenon was confirmed to decrease the expression of fat accumulation-related PPARγ and FAS protein in the liver tissue. Especially, it is believed that FAS, a liposynthetic enzyme, has a stronger inhibitory effect than PPARγ. Therefore, Coriandrum sativum L. ethanol extract is thought to improve obesity by reducing blood lipids levels, improving glucose metabolism and inhibiting synthesis of the fat that accumulates in the liver in high-fat diet-induced obesity animal models.

• 한국가시화정보학회지
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• 제21권1호
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• pp.94-102
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• 2023

Three design parameters were considered in this study: outlet nozzle angle (30°, 60°, 80°), neck length (1 mm, 3 mm), and flow rate (0.5, 0.6, 0.7, 0.8 lpm). A neck diameter of 0.5 mm induced cavitation flow at a venture nozzle. A secondary transparent chamber was connected after ejection to increase bubble duration and shape visibility. The bubble size was estimated using a Gaussian kernel function to identify bubbles in the acquired images. Data on bubble size were used to obtain Sauter's mean diameter and probability density function to obtain specific bubble state conditions. The degree of bubble generation according to the bubble size was compared for each design variable. The bubble diameter increased as the flow rate increased. The frequency of bubble generation was highest around 20 ㎛. With the same neck length, the smaller the CV number, the larger the average bubble diameter. It is possible to increase the generation frequency of smaller bubbles by the cavitation method by changing the magnification angle and length of the neck. However, if the flow rate is too large, the average bubble diameter tends to increase, so an appropriate flow rate should be selected.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.435-439
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• 2015

It is important for Singaporean companies to manage the multifaceted risks when forming international construction joint ventures (ICJVs) with developing countries. The objectives of this study are to assess the risks associated with Singaporean ICJVs with developing countries, and investigate the risk allocation preferences in these ICJVs. To fulfill these objectives, a literature review was carried out and a questionnaire survey was performed with 38 professionals. The survey results reported "political instability" as the most critical risk, and market level risks were less critical than country and project level risks. Additionally, the results showed agreement on the risk ranking between building and infrastructure ICJVs, despite significant differences in the criticalities of five risks. Furthermore, five risks were preferably allocated to host and foreign partners, respectively, while 13 risks could be shared among partners. As few studies have explored the risk allocation preferences in ICJVs, this study expands the literature. Also, the identification of the risks allows other companies to customize their own lists of critical risks, while the preferred risk allocation provides valuable information for companies from various countries that intend to form ICJVs with developing countries. Thus, this study contributes to the global body of knowledge relating to ICJVs.

• 한국식품영양학회지
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• 제36권5호
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• pp.403-414
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• 2023

This study aimed to determine the anti-obesity effect of adding Wolfiporia extensa Ginns (W) to fermented pollack skin products in an obesity-induced animal model. The experimental groups were the normal diet group (C), high-fat diet group (HF), dried pollack skin (H1), fermented pollack skin (H2), and W of 0.1 (F2-WL), 0.3 (F2-WM), and 0.5 (F2), respectively. It was confirmed that adding W to fermented pollack skin reduced blood triglycerides, total cholesterol, and LDL levels, while increasing HDL levels. Wolfiporia extensa Ginns was effective in controlling weight and improving blood lipids in a dose-dependent manner. In histological analysis, findings of fatty liver induced by a high-fat diet were improved by the addition of H2 and W. Size and density of fat globules in the epididymis were decreased. In addition, the concentration of TNF-α was increased in the high-fat diet group, but decreased by the addition of fermented pollack skin and W. In conclusion, adding fermented dried pollack skin and Wolfiporia extensa Ginns was effective for weight control and blood lipid improvement. Thus, the use of by-products in functional foods is expected to have a high value in the future.

• 디지털융복합연구
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• 제14권5호
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• pp.341-348
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• 2016

VPN은 인터넷망을 이용하므로 데이터를 암호화하는 보안기술이 뒷받침되어야 하며 보안성에 대한 확신을 줄 수 있도록 표준에 기반을 둔 평가 기술이 뒷받침되어야 한다. 그러므로 연관된 표준을 기반으로 VPN의 보안성을 평가할 수 있는 방법을 체계화할 필요가 있다. 따라서 본 연구에서는 정보보호시스템의 인증을 위한 평가기준인 CC(Common Criteria)와 소프트웨어 품질평가 표준인 ISO의 보안성(기밀성, 무결성, 부인방지, 책임성, 인증성) 평가 부분을 접목하여 이를 통합한 보안성 평가 모델을 구축하고자 하였다. 이를 위해 VPN의 기반 기술과 보안성에 관한 품질 요구사항을 분석하여 두 국제표준의 품질특성과의 연관성을 고려한 평가모델을 개발하였다. 이를 통해 VPN의 보안성 품질수준을 평가하는 융합 모델을 구축할 수 있을 것으로 사료되며, 향후 VPN에 대한 평가사례의 축적을 통해 평가모델의 적합성과 타당성을 제고할 필요가 있다.

• 한국지역지리학회지
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• 제18권4호
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• pp.400-413
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• 2012

본 연구는 지방첨단산업단지의 형성과정과 특성을 살펴보기 위해 오창과학단지를 사례로 입주한 기업체의 업종별, 종사자 수규모별 특성과 기업의 이전과정을 분석하였다. 분석 자료는 기업통계 자료와 기업체들을 대상으로 설문조사 내용이었으며 분석 결과는 다음과 같다. 첫째, 오창과학단지에 입지한 기업체들은 IT산업과 BT산업이 혼재되어 나타났다. 둘째, 오창과학단지 내에 입주한 기업들의 규모별 특성은 대기업보다는 중소규모의 기업체가 많았다. 그리고 입주한 기업들은 새로운 상품을 개발하고 마케팅을 하는 단계에 있으며, 핵심적인 기술이나 벤처 인증을 받은 혁신성이 높은 부품 소재 업체들이 많았다. 셋째 오창과학단지에 입주한 기업들은 수도권과 충청권에서 이주한 기업의 비율이 높았고 본사와 함께 입주한 비율이 70% 이상을 차지했다. 넷째 기업들은 생산품 유형과 기술의 보유 정도에 따라 크게 4가지 유형으로 분류되었다.

• 한국벤처창업학회:학술대회논문집
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• 한국벤처창업학회 2006년도 추계학술발표회
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• pp.197-217
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• 2006

본 연구는 수출을 기반으로 성장을 하는 우리나라 벤처 기업의 수출성장에 미치는 영향요인을 분석하는 것을 목적으로 한다. 기존 연구에 대한 문헌조사를 통하여 수출과 관계된 기업의 존속여부와 성장성(매출액 성장성)은 기업내부의 여러 가지 요인 및 기업을 둘러싸고 있는 외부적 환경과의 일정한 상관관계와 인과관계의 틀 속에서 기업의 존속여부와 성장성(수출액 성장성)이 결정된다고 생각할 수 있다. 또한 기업을 둘러싸고 있는 외부적환경은 기업 스스로의 힘과 의지에 의해서 통제될 수 없는 부분이라고 생각할 수 있는바 기업의 존속여부와 성장성(수출액 성장성)은 기업내부의 요인에 의하여 결정된다고 판단 할 수 있다. 기업의 성장성(수출액 성장성)을 결정하는 중요한 요인에는 어떤 것이 있으며 그러한 요인이 어느 정도의 영향력으로 기업의 성장성(수출액 성장성)에 영향력을 미치는가를 요인간의 모형으로 설정하고자 한다.

• Biomolecules & Therapeutics
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• 제21권1호
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• pp.72-78
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• 2013

This work aimed to assess some pharmacological activities of P. leptostachya var. asiatica Hara. The dried roots of P. leptostachya var. asiatica Hara were extracted with 70% ethanol to generate the powdered extract, named PLE. Anti-angiogenic activity was detected using chick chorioallantoic membrane (CAM) assay. In vitro anti-inflammatory activity was evaluated via analyzing nitric oxide (NO) content, inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) in lipopolysaccharide (LPS)-stimulated RAW264.7 macrophage cells. Antioxidant activity was determined by 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay and reactive oxygen species (ROS) level in the stimulated macrophage cells. Matrix metalloproteinase-9 (MMP-9) and -2 (MMP-2) activities in the culture media were detected using zymography. PLE exhibits an anti-angiogenic activity in the CAM assay, and displays an inhibitory action on the generation of NO in the LPS-stimulated macrophage cells. In the stimulated macrophage cells, it is able to diminish the enhanced ROS level. It can potently scavenge the stable DPPH free radical. It suppresses the induction of iNOS and COX-2 and the enhanced MMP-9 activity in the stimulated macrophage cells. Both monooxygenase and oxidase activities of tyrosinase were strongly inhibited by PLE. Taken together, the dried roots of P. leptostachya var. asiatica Hara possess anti-angiogenic, anti-inflammatory, antioxidant and skin whitening activities, which might partly provide its therapeutic efficacy in traditional medicine.