• Journal of the Korean Wood Science and Technology
• /
• 제48권4호
• /
• pp.450-457
• /
• 2020

Single pellet press technology allows for fast, low-cost, and small-scale tests to investigate pelletizing characteristics. We estimated proper compression ratios for five Korean domestic wood species through predicted relationships between pelletizing pressure P_x and compression ratio based on experimental data obtained from a single pellet press unit. The pressures required to obtain a 6-mm-diam pellet of density 1200 kg/㎥ were estimated as 111 MPa for Populus davidiana, 133 MPa for Robinia pseudoacacia, 136 MPa for Quercus mongolica, 97 MPa for Pinus densiflora, and 127 MPa for Pinus rigida. On the basis of these pressures, we estimated proper compression ratios to be within the range 7.676-8.410 for these species, and we found the compression ratios needed for hardwood species to be somewhat higher than those needed for softwood species to obtain the pellet density of 1200 kg/㎥.

• EDISON SW 활용 경진대회 논문집
• /
• 제4회(2015년)
• /
• pp.532-534
• /
• 2015

This is a dissertation is in urgent announce of the domestic legislation about bungee jumping. A bungee jumping operator puts the blame on us for causing the bungee jumping accident but before calling it, equipment of bungee jumping was old and deficient. Fee of bungee jumping is fifty thousand won. A rope seller has raised the price, as operator break the rope used limit. So that is reasonable price. Even now, operator break the rope used limit and legislation about bungee jumping is nonexistent so bungee jumping accidents occur with frequency in domestic.

• 한국표면공학회지
• /
• 제32권3호
• /
• pp.253-256
• /
• 1999

Wet plating has been initiated and developed as a major surface finishing technology as of the long customized and highly productive process until now. As the external compression by virtue of the environmental preservation becomes stricter, there has been new move to adapt dry plating line instead of conventional wet plating one in domestic surface finishing industry. Dry plating, so-called, plasma surface technology has been developed in semiconducting industry and becomes a key technology to be useful as an alternative to wet plating in surface finishing industry. The historical progress of domestic surface finishing industry was outlined with the background on the adaptation of three dry plating processes-plasma spraying, plasma nitriding and ion plating. The present status of domestic industrial activity was covered on major alternative to wet plating.

• Journal of Animal Science and Technology
• /
• 제59권11호
• /
• pp.24.1-24.14
• /
• 2017

Over the past decades, in vitro culture media have been developed to successfully support IVF embryo growth in a variety of species. Advanced reproductive technologies, such as somatic cell nuclear transfer (SCNT), challenge us with a new type of embryo, with special nutritional requirements and altered physiology under in vitro conditions. Numerous studies have successfully reconstructed cloned embryos of domestic animals for biomedical research and livestock production. However, studies evaluating suitable culture conditions for SCNT embryos in wildlife species are scarce (for both intra- and interspecies SCNT). Most of the existing studies derive from previous IVF work done in conventional domestic species. Extrapolation to non-domestic species presents significant challenges since we lack information on reproductive processes and embryo development in most wildlife species. Given the challenges in adapting culture media and conditions from IVF to SCNT embryos, developmental competence of SCNT embryos remains low. This review summarizes research efforts to tailor culture media to SCNT embryos and explore the different outcomes in diverse species. It will also consider how these culture media protocols have been extrapolated to wildlife species, most particularly using SCNT as a cutting-edge technical resource to assist in the preservation of endangered species.

• 산업기술연구
• /
• 제37권1호
• /
• pp.32-36
• /
• 2017

In this study, as part of a research on the development of economical high-performance concrete with high strength and high quality, the physical properties of high-performance concrete were analyzed by substituting a certain amount of low-cost domestic silica fume exempted from the re-importation type distribution structure of the domestic production and the existing high-priced silica fume distribution structure. Performing tests to identify the physical properties of the fresh and hardened concrete and durability analogy of the concrete which use low-cost domestic silica fume and imported silica fume, the chloride ion penetration resistance test result showed that the strength difference between the low-cost silica fume and the imported silica fume is not big but the strength of the low-cost silica fume was measured higher than the imported silica fume. The chloride ion penetration resistance of all variables was measured as "very low". Since the low-cost domestic silica fume can be used as a high-performance admixture of concrete, the results suggest that it is possible to produce a more economical high-performance concrete.

• International Journal of Advanced Culture Technology
• /
• 제12권2호
• /
• pp.299-308
• /
• 2024

This study aims to explore improvement measures for the linkage system between the police and social welfare agencies in responding to domestic violence and child abuse issues in South Korea by comparing and analyzing the current systems in South Korea, the United States, and the United Kingdom. Despite the legal and institutional foundations for victim protection and perpetrator correction in each country, the effectiveness of actual cooperation faces several limitations. In South Korea, the level of cooperation is insufficient due to the lack of information sharing, role conflicts, and ambiguity of cooperation procedures. The United States and the United Kingdom operate more systematic cooperation programs, showing notable achievements in mental health crisis intervention and domestic violence response. To improve the linkage system in South Korea, this study proposes the following measures: (1) developing a clear cooperation protocol, (2) conducting regular education and training programs, (3) establishing an integrated information system, and (4) strengthening the victim-centered approach. Implementing these measures will contribute to more effective responses to domestic violence and child abuse issues, ultimately leading to a healthier and safer society by reducing social costs through victim protection and perpetrator correction.

• 한국환경과학회지
• /
• 제21권7호
• /
• pp.825-835
• /
• 2012

This study for the development of water purification Artificial floating island maximizing domestic Artificial floating island patent trends and product development, according to the timing of patent registration was analyzed for trends. In addition, domestic invention patent technology Artificial floating island typed according to the purpose and characteristics of domestic patents were Artificial Floating Island. In particular, domestic leisure space with a growing population and the need for securing emerging role as a reservoir of water only in the past, who do appeal as a tourist destination or as an ecological space utilized, and accordingly will transform and the need to secure a hydrophilic, degrade water quality problems using this aquatic environment (water acquisition and hydrophilic), the requirements are a big obstacle is the reality factor. This patented product differentiation strategy through the analysis of the development of technology progressiveness (Field Application) in terms of water quality improvement and maintenance side, and the hydrophilic side scenery, ecological restoration aspects, and applicability to the field and taking into account existing technology economic aspects of distinction were presented and advertised a lot in terms of cost compared to other techniques without the use of highly efficient methodology for building a water purification and also appears identity appeal, wetlands, rivers, etc. can be applied broadly technician widespread deployment and installation time to less simple and more are expected to spread.

• Asian-Australasian Journal of Animal Sciences
• /
• 제26권3호
• /
• pp.443-454
• /
• 2013

Tenderness is the most important meat quality trait, which is determined by intracellular environment and extracellular matrix. Particularly, specific protein degradation and protein modification can disrupt the architecture and integrity of muscle cells so that improves the meat tenderness. Endogenous proteolytic systems are responsible for modifying proteinases as well as the meat tenderization. Abundant evidence has testified that calpains (CAPNs) including calpain I (CAPN1) and calpastatin (CAST) have the closest relationship with tenderness in livestock. They are involved in a wide range of physiological processes including muscle growth and differentiation, pathological conditions and post-mortem meat aging. Whereas, Calpain3 (CAPN3) has been established as an important activating enzyme specifically expressed in livestock's skeletal muscle, but its role in domestic animals meat tenderization remains controversial. In this review, we summarize the role of CAPN1, calpain II (CAPN2) and CAST in post-mortem meat tenderization, and analyse the relationship between CAPN3 and tenderness in domestic animals. Besides, the possible mechanism affecting post-mortem meat aging and improving meat tenderization, and current possible causes responsible for divergence (whether CAPN3 contributes to animal meat tenderization or not) are inferred. Only the possible mechanism of CAPN3 in meat tenderization has been confirmed, while its exact role still needs to be studied further.

• 한국컴퓨터정보학회:학술대회논문집
• /
• 한국컴퓨터정보학회 2012년도 제46차 하계학술발표논문집 20권2호
• /
• pp.75-77
• /
• 2012

최근 국내 과학기술분야 학회에서는 발행 학술지를 세계적인 학술지로 등재하고자 하는 노력이 증가하고 있다. 이에 따라, 해외연구자들을 학술지 편집위원으로 참여 시키고 많은 해외 연구자들이 자체 학술지에 논문을 많이 투고하도록 독려하고 있다. 해외 연구자들간에 이메일로 투고 심사를 처리하고 심사 총평을 작성하는 논문투고심사 프로세스는 심사 이력이 관리도 안 될 뿐만 아니라 논문투고 심사 진행 상황을 알 수 없음으로 인한 이용자의 불편함, 시간적 비효율성 등의 많은 단점이 있다. 이에 KISTI는 해외 연구자들이 학술지 생산을 위한 학술활동 전 과정에 참여할 수 있도록 하고자, 학술지를 체계적으로 운영하고 투명한 상호심사(Peer Review) 과정을 포함하는 학술지 전자 출판과정을 온라인으로 처리하고 모든 메뉴 용어를 국제적인 수준의 영어로 기술한 영문 Article Contribution Management System(ACOMS Ver. 4.0)를 개발하였다. 영문ACOMS는 기존 국문 ACOMS와 달리, 학술지 홈페이지를 포함하고 있으며, 저자와 편집위원 혹은 저자와 판사 간의 온라인 논문 교정 프로세스가 들어가 있다. 영문 ACOMS는 2012년 현재에도 국제적인 시스템으로 거듭나기 위해 지속적인 기능개선을 추진하고 있다. 개발된 영문 ACOMS 기능에 대해 살펴보고, 향후 개선방안에 대해 기술한다.

• 한국건설관리학회논문집
• /
• 제9권1호
• /
• pp.107-117
• /
• 2008

국내 건설산업은 해외 시장에서 경쟁력을 높이기 위해 각종 R&D투자를 늘리고 있는 실정으로 본 연구에서는 국내 건설산업이 해외 건설시장에서 경쟁력을 보유하고 있는 대표 건설상품에 대한 경쟁력을 종합적이고 다각적으로 평가하였다. 이를 위하여 기존 연구에서 실시한 기업의 경쟁력과 기술수준을 평가한 자료를 근거로 기술수준을 측정할 기술수준지표와 기술수준 측정방법론을 선정하였으며, 기존연구에서 부족하였던 기술수준 및 기술경쟁력 평가의 심층성에 대한 보완 방안으로 해외 경쟁력 보유 상품을 선별한 후, 관련 업무 전문가를 대상으로 기술수준을 평가하였다. 전문가 대상 요소는 '기술경쟁력', '경영 및 지원 경쟁력'을 대상으로 실시하였으며 각 요소의 평가 점수를 통하여 선진국과의 경쟁력 보유여부를 평가하였다. 이러한 평가결과를 토대로 국내 건설 산업이 시장측면이나 기술측면에서 해외시장에서 경쟁이 가능한 유망 상품을 도출하고 국제경쟁력을 증대할 수 있는 방안에 대하여 연구를 진행하였다.