• Current Optics and Photonics
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• 제4권5호
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• pp.441-445
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• 2020

A novel design for a Fresnel lens for a solar end-pumped laser is demonstrated in this paper. The new hybrid Fresnel lens includes two parts, inner and outer. The inner part is a twice-total-internal-reflection and vertical-transmission lens. The outer part is a once-total-reflection and vertical-transmission lens. The radius of the Fresnel lens is 600 mm, and its focal length is 750 mm. The concentrating performance of the Fresnel lens is examined using TracePro. The results show that the concentration efficiency has been greatly improved. The total concentration efficiency of the hybrid Fresnel lens reaches 73.2% when the radius of the laser rod is 3 mm. This design can simplify the concentration system of a solar end-pumped solid-state laser.

• International Journal of Computer Science & Network Security
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• 제21권4호
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• pp.229-240
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• 2021

The article seeks to explore Ukrainian media art and its features in a global context. In particular, it performs an in-depth analysis of the stages of its development from video art of the 1990s, media installations of the 2000s, and to various digital and VR technologies today. Due to historical circumstances, the development of media art was quite rapid, as young artists sought to gain new experience in media art. Most often, their experience was broadened through international cooperation and studying abroad. The paper analyzes the presentation of Ukrainian media art outside the country during 1993-2020 and distinguishes the main thematic areas of the artists' work. It examines how artists present and reveal the peculiarities of the Ukrainian worldview, aesthetics, and culture through the problematization of certain aspects and themes in their work. Specifically, among the principal topics which are problematized in the work of media artists are a sensory experience, limited sensory capabilities, gender issues, the Chernobyl tragedy, the development of utopian models of the city, and global communication. The leading themes of Ukrainian artists also include revolution and war. Notably, political and social sentiments determine the unique energy and vitality of contemporary Ukrainian art, create a revolutionary creative environment, and unite media artists in group art projects. It is concluded that by showing, exhibiting, and presenting them outside the country, artists shape the image of Ukrainian art in a global context.

• International Journal of Computer Science & Network Security
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• 제21권6호
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• pp.181-186
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• 2021

Ensuring national security in cyberspace is becoming an increasingly important issue, given the growing number of cybercrimes due to adaptation to new security and protection technologies. The purpose of this article is to study the features of counteracting, preventing, and detecting crimes in the virtual space of Ukraine on the example of cases and analysis of the State Center for Cyber Defense and Countering Cyber Threats CERT-UA and the Cyber Police Department of the National Police of Ukraine. The research methodology is based on the method of analysis and study of cases of crime detection in the virtual environment of the State Center for Cyber Defense and Countering Cyber Threats CERT-UA and the Cyber Police Department of the National Police of Ukraine. The results show that the consistent development of the legal framework in 2016-2020 and the development of a cyber-defense strategy for 2021-2025 had a positive impact on the institution-building and detection of cybercrime in Ukraine. Establishing cooperation with developed countries (USA) has helped to combat cybercrime by facilitating investigations by US law enforcement agencies. This means that international experience is effective for developing countries as a way to quickly understand the threats and risks of cybercrime. In Ukraine, the main number of incidents concerns the distribution of malicious software in the public sector. In the private sector, cyber police are largely confronted with the misappropriation of citizens' income through Internet technology. The practical value of this study is to systematize the experience of overcoming cybercrime on the example of cases of crime detection in a virtual environment.

• 적정기술학회지
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• 제7권1호
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• pp.115-124
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• 2021

1단계 거점센터 사업이 종료됨에 따라 2단계 거점센터의 필요성에 대한 공감대가 형성되어 최근 2단계 글로벌문제해결거점 2030 로드맵이 제시되었다. 2단계 거점센터의 비전은 지속 가능한 지구촌 공동체 실현을 위한 기술협력 플랫폼 구축이다. 사업 방향성은 크게 3가지 핵심전략사업과 중점전략사업으로 구분된다. 핵심전략사업의 목표는 지속가능/포용적/혁신적 과학기술 ODA 사업수행을 위한 글로벌 기술협력거점 및 융합기술 스마트 플랫폼 마련이며 핵심전략사업 과제는 거점센터 중심의 글로벌 리빙랩을 통한 2단계 요소기술개발, 스마트 기술연계 체계구축 및 다자협력 사업화 추진, ICT 기반 글로벌 핵심기술 운영 플랫폼 및 성과확산이 있다. 중점전략사업의 목표는 지속가능 기술구현을 통한 글로벌 거점지역 문제해결 및 국제협력이며 중점전략사업 과제는 기존 거점센터 2단계 전략기술의 ICT package 및 스마트 구축, 글로벌 리빙랩 중점기술에 대한 스마트 연계체계 개발, 거점센터의 기술성과 운영지원을 위한 글로벌 통합기술 비즈니스 지원 플랫폼 추진이다.

• Journal of Plant Biotechnology
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• 제38권2호
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• pp.137-142
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• 2011

Auxin is a group of small natural and synthetic molecules having diverse regulatory functions in plant growth and development. In this review, two auxin binding proteins identified by biochemical experiments to measure their auxin binding activities and biochemical functions are described. ABP1, a 22 kDa auxin binding protein, shows strong auxin binding affinity and possibly plays an important role in plant development, although its biochemical function are still unclear. ABP57, a 57 kDa soluble protein from rice shoots, has both of IAA binding activity and the plasma membrane proton pump activation. Although it is yet to be accomplished, the improvement of agronomic traits using auxin binding proteins is worth to be considered, since auxin is known to be related to such a diverse crop traits.

• 벤처창업연구
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• 제10권1호
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• pp.33-44
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• 2015

본 연구에서는 대전의 혁신과 창업을 위한 과학기술정책과 산학협력방안에 대해서 고찰한다. 이를 위하여 대전의 기술혁신시스템에 대해서 고찰하였다. 대전의 과학기술시스템은 지역과 중앙의 과학기술혁신거버넌스가 조화를 이루고 있다. 정부출연연구소, 민간연구소, 지역의 벤처/중소기업, 대학 및 관련지원기관인 대전테크노파크, 대전벤처협회 등 지원기관이 구축되어있다. 이를 기반으로 한 혁신클러스터로서 '대덕연구개발특구'와 새로운 기초과학 중심의 혁신클러스터인 국제과학비즈니스벨트가 있다. 대전의 과학기술정책은 지역수준에서 중앙과 지역정책의 조화를 이루는 과학기술정책의 비전을 바탕으로 주요 혁신클러스터 육성, 대전지역의 전략산업육성, 신선장동력으로 IT, BT, NT 융복합 산업의 육성, 벤처기업의 단계별 육성이다. 이러한 과학기술정책의 기본 방향 하에 대전지역의 혁신과 창업을 위한 과학기술정책과 산학협력활성화 전략을 고찰하면 다음과 같다. 첫째, 중앙과 지역의 조화를 고려하여 지역수준의 예측을 기반으로 과학기술정책 추진하는 것이다. 둘째, 지역과학기술 및 벤처생태계를 고려한 글로벌 혁신클러스터 육성이다. 대전지역을 대덕연구개발특구이외에 국제과학비즈니스벨트를 양대축으로 하여 세계적인 혁신클러스터의 중심으로 육성하는 것이다. 셋째, 세종시 및 수도권 등 광역권 산학협력 강화 추진하는 것이다.

• Ocean and Polar Research
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• 제30권2호
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• pp.173-180
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• 2008

This study demonstrates that cooperative management can provide more benefits than noncooperative management for Korea and Japan fishery. We have studied one management strategy, namely, fishing under joint maximization of net benefits in coastal waters of two countries, using a cooperative game theory. The present net return under non-cooperation amounts to 420,255 million won. However, if two countries cooperate one with another, this figure can get to 2,636,565 million won. We consider this to be an important conclusion as close management relationships have developed between the two countries since the establishment of the EEZ in 1996. The results of the study can also help balance resource conservation and the appropriate catch quota in each country.

• The Journal of Asian Finance, Economics and Business
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• 제7권9호
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• pp.389-400
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• 2020

A construction project is a designed product made up of labors, materials, and installations in the project positioned on the ground and may include the underground and ground section, and the section in water or on the water surface. It is a civil, industrial, transport, agricultural and rural development, infrastructure, or some other. A key phase in the life cycle of these construction projects is the implementation when building products are made directly with workers, equipment, materials, and managers. If there is a lack of management experience, information, and problem-solving solutions to tackle the risks faced by contractors, especially foreign ones, will fail in controlling the project's cost. This study was conducted with investigations, discussions, and evaluation of the factors that lead to cost overruns in the construction projects of international contractors in Vietnam. The principal component analysis (PCA) showed that those factors that influence cost overruns these construction projects fall into five general groups, including factors related to (i) the owners, (ii) the foreign contractors, (iii) the subcontractors and suppliers, (iv) state management, and (v) the project itself. Besides, the study proposes solutions to limit cost overruns in construction projects and improve the profitability of international contractors in Vietnam.

• 한국농공학회논문집
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• 제60권3호
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• pp.107-112
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• 2018

In this study, we conducted to analyze and quantify the amount of nitrogen supply into the rice paddies from the rainfall during cropping and non-crop periods. Rainfall monitoring conducted 85 times from June 2015 to December 2017. Nitrogen supply of cropping season ranged from 5.37 to 7.70 kg/ha, while non-cropping season were supplied from 3.97 to 4.42 kg/ha. The supply of T-N in the crop period was more than 60% of the total supply. And as a result of analyzing the correlation between the characteristics of rainfall and the supply amount, nitrogen concentrations in rainfall were decreased with increasing rainfall, but the supply amount was increased. Therefore, efforts should be made to increase the rainfall utilization and to increase the nitrogen supply of crops by increasing rainfall storage through drainage management.

• Journal of Animal Science and Technology
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• 제62권2호
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• pp.247-262
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• 2020

Birth weight and subsequent weight gain is of critical importance in the survival and performance of piglets on a commercial swine farm setting. Oropharyngeal microbiome could influence immunity, and feeding behavior thus impacting health and weight gain. We used 16S rRNA gene sequencing to profile the composition and predicted metabolic functionality of the oropharyngeal microbiota in 8 piglets (4 with a birthweight ≤ 1.0 kg and 4 with a birthweight ≥ 1.7 kg) at 11, 26, and 63 days of age. We found 9 genera that were significantly associated with average daily gain (ADG) at 11 days (false discovery rate, FDR < 0.05) and 26 days of age (FDR < 0.1), respectively. The microbial functional profile revealed several pathways associated with ADG (FDR < 0.05). Among these, pathways related to degradation of catechols showed a positive association with ADG at 11, 26, and 63 days of age, implying a potential to breakdown the host-derived catecholamines. We also noted that pathways related to the biodegradation of nucleosides and nucleotides increased with ADG during the pre-weaning phase, while those involved in their biosynthesis decreased. Our findings provide insights into the oropharyngeal microbial memberships and metabolic pathways that are involved in a piglet's weight gain. Thus, providing a basis for the development of strategies aimed at improving weight gain in pigs.