• 한국가금학회지
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• 제21권1호
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• pp.21-34
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• 1994

우리의 채란 양계산업은 호당 사육 규모의 확대와 기술개선이 있었음에도 사육 기반은 낙후되었고 자동화 시설이 크게 도입되지 않았으며 영농 기록도 하지 않았다. 이는 아직도 기술 향상과 구조개선에 의해 생산비 절감이 가능함을 보인 것이다. 이 연구에서의 경쟁력 향상을 위해 채란양계 경영 내부에서 무엇이 문제인가를 판단하고 개선방향을 분석하는데 필요한 전산모형을 개발함으로써 그동안 실행되지 못했던 경영진단을 실시할 수 있고, 새로운 경영전략의 도입에 대한 경제적 합리성의 판단을 쉽게 할 수 있게 하였다. 또한 우리 농가의 실정에 적합하도록 입출력 모형을 세웠고, 컴퓨터에 대한 지식이 없는 농가도 쉽게 이용할 수 있도록 한글화시켰으며, 모형을 단순화 하였으면서도 농민이나 연구자들이 필요로 하는 내용은 포함토록 하였다. 우리나라의 개인용 컴퓨터의 보급이 크게 신장되었으나, 아직도 채란계 농가까지 널리 보급되지 않은 상태에서 채란계 농가가 쉽게 이용할 수 있는 이러한 프로그램들이 많이 개발되어야 채란계 농가에 컴퓨터의 보급이 촉진되고, 정보화 시대에 대응할 수 있기 때문에 이 모형은 상당한 유용성을 가진다고 볼 수 있다. 앞으로는 일반관리(사양관리, 방역관리, 사료, 작업관리) 등과 결합된 종합 경영관리 모형이 개발되어 농민이 컴퓨터에 쉽게 접근할 수 있도록 해야 한다.

• Asian-Australasian Journal of Animal Sciences
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• 제30권11호
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• pp.1563-1567
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• 2017

Objective: The influence of substituting steam-flaked corn (SFC) for dry rolled corn (DRC) on feedlot cattle growth performance and dietary net energy when cattle are allowed either ad libitum or 2-h restricted access to the finishing diet was evaluated. Methods: Treatment effects were tested using 96 crossbred steers ($251{\pm}2kg$) during the initial 56 d of the finishing phase. Cattle were blocked by weight and randomly assigned within blocks to 16 pens (4 pens/treatment). Bunk space was sufficient (41 cm/head) to allow all steers access to the feed bunk at the same time. Treatments consisted of two finishing diets containing (dry matter basis) 77.1% corn grain processed by dry rolling (density = 0.50 kg/L) or steam flaking (density = 0.36 kg/L). Cattle were fed twice daily at 06:00 and 14:00 h, allowing for approximately 5% residual. In the case of restricted feeding, steers were allowed access to feeders for 1 h following each feeding, after which residual feed was withdrawn. Results: There were no treatment interactions on dry matter intake (DMI), average daily gain (ADG), gain efficiency (G:F), or dietary net energy (NE). Restricting feed access time reduced (p<0.01) feed intake, and hence, ADG. Substitution of SFC for DRC increased (p<0.01) ADG, feed efficiency (G:F), and estimated dietary NE, without affecting DMI. Based on tabular net energy of maintenance ($NE_m$) value (2.18 Mcal/kg) for DRC, the estimated $NE_m$ value for SFC using the replacement technique, averaged 2.44 Mcal/kg; an improvement of 10.7%. The ratio of observed-to-expected dietary NE was not affected by feed access time. Conclusion: Substitution of SFC for DRC in finishing diets for feedlot cattle enhanced ADG, gain efficiency, and the NE value of the diet. Although restriction of feed access time depressed DMI and ADG, it did not affect the comparative benefit of steam flaking toward enhancement of ADG, G:F, and dietary NE.

• 한국환경생태학회지
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• 제35권4호
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• pp.336-346
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• 2021

최근 생명공학 R&D의 필수 재료인 유전자원에 대한 취득과 그 이용을 규제하는 국제 규범, 즉 나고야의정서가 등장하면서 관련 분야 연구자에게 상당한 불편과 부담이 우려되고 있다. 나고야의정서가 발효함에 따라 그 동안 인류공동유산으로서 마치 공공재처럼 모든 국가가 자유롭게 사용해왔던 유전자원에 대하여 자원 보유국의 배타적 소유권이 인정되면서 자원의 취득과 이용에 대한 각국의 법적 규제가 도입되고 있다. 특히 유전자원의 해외의존도가 높은 우리나라는 보다 체계적인 대응을 해야 할 필요성이 있다. 본 논문은 연구자를 포함한 국내외 유전자원 이용자의 나고야의정서에 대한 인식 제고를 위하여, 먼저 의정서의 주요 핵심내용을 분석하고 해외 유전자원 이용을 위한 접근, 취득 및 이익공유의 전체적인 구조와 흐름을 제시함으로써 향후 적절한 대응에 도움이 될 수 있도록 구성·기술하였다. 나고야의정서에 적절하게 대처하기 위해서는 연구자 본인의 노력과 국가적인 차원에서의 지원이 동시에 필요하다. 우선 연구자는 나고야의정서 체제에서의 연구활동 진행에 관한 전체적인 틀과 각 단계별 구체적인 대응에 관한 이해를 반드시 해야 한다. 이를 토대로 유전자원 접근단계부터 이로 인해 발생한 이익의 공유단계까지 제공국의 ABS 절차에 적절하게 대응해야 한다. 이렇게 볼 때 나고야의정서로 인해 과거 대비 연구활동에 일정부분 제한이 가해지고 연구 외적인 부담이 가중되었다고 할 수 있다. 하지만 전 세계적으로 유전자원에 대한 국가의 주권을 인정하는 현 상황을 일시적인 것으로 보기는 어렵다. 나고야의정서 체제를 중심으로 자국의 유전자원에 대한 주권적 권리를 지키고자 하는 자원부국의 기조가 더 강해질 것이기 때문이다. 따라서 우리나라 환경생태분야 연구자도 본 논문의 내용을 참고하여 불필요한 피해를 입지 않기 위한 대비를 확실히 해야 할 것이다.

• 한국재료학회지
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• 제27권2호
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• pp.63-68
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• 2017

A black nickel oxide powder, one of the commercial nickel oxide ores, was reduced by hydrogen gas in a batch-type fluidized-bed reactor in a temperature range of 350 to $500^{\circ}C$ and in a residence time range of 5 to 120 min. The hydrogen reduction behavior of the black nickel oxide was found to be somewhat different from that of green nickel oxide ore. For the black nickel oxide, the maximum temperature (below which nickel oxide particles can be reduced without any agglomeration) was significantly lower than that observed for the green nickel oxide. In addition, the best curve fittings of the Avrami model were obtained at higher values of the overall rate constant "k" and at lower values of the exponent "m", compared to those values for the green nickel oxide. It may be inferred from these results that the hydrogen reduction rate of the black nickel oxide is faster than that of the green nickel oxide in the early stages, but the situation reverses in the later stages. For the black nickel oxide ore, in spite of the low temperature sintering, it was possible to achieve a high degree fluidized-bed reduction at lower temperatures and at lower gas consumption rates than was possible for the green nickel oxide. In this regard, the use of black nickel oxide is expected to yield a benefit if its ore price is sufficiently lower than that of the green nickel oxide.

• 한국콘텐츠학회논문지
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• 제10권7호
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• pp.159-168
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• 2010

90년대 이후부터 스토리보드의 디지털화가 꾸준히 연구되어 오면서 많은 종류의 스토리보드 소프트웨어들이 탄생하게 되었다. 그러나 이러한 소프트웨어들이 기존의 방식에 비해 효율적으로 어떠한 차이점이 있는지에 대한 구체적인 데이터가 부족하여 85명의 실험대상자에게 사용빈도수에 따른 스토리보드 소프트웨어 5개를 선정하여 사용성을 분석해 본 결과 크게 2가지의 결과를 도출해 낼 수 있었다. 첫째로는 선정된 5개의 소프트웨어 모두 상호작용 표현기능이 누락되어 있어 이것의 개발방향을 제시 할 수 있었으며. 둘째로는 스토리보드 소프트웨어로 얻을 수 있는 가장 중요한 효과는 콘텐츠의 디지털화가 아닌 콘텐츠의 실시간 플레이를 통해 얻을 수 있는 정보 전달력에 있다는 것을 실험을 통해 알 수 있었다. 본 연구를 통하여 얻은 결과는 소프트웨어의 개발자에게 새로운 모델을 제시 할 수 있으며 사용자에게는 스토리보드 소프트웨어를 통해 얻을 수 있는 효과를 이해하는 데에 도움이 될 수 있기를 기대한다.

• 한국재료학회지
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• 제33권5호
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• pp.175-188
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• 2023

Water electrolysis holds great potential as a method for producing renewable hydrogen fuel at large-scale, and to replace the fossil fuels responsible for greenhouse gases emissions and global climate change. To reduce the cost of hydrogen and make it competitive against fossil fuels, the efficiency of green hydrogen production should be maximized. This requires superior electrocatalysts to reduce the reaction energy barriers. The development of catalytic materials has mostly relied on empirical, trial-and-error methods because of the complicated, multidimensional, and dynamic nature of catalysis, requiring significant time and effort to find optimized multicomponent catalysts under a variety of reaction conditions. The ultimate goal for all researchers in the materials science and engineering field is the rational and efficient design of materials with desired performance. Discovering and understanding new catalysts with desired properties is at the heart of materials science research. This process can benefit from machine learning (ML), given the complex nature of catalytic reactions and vast range of candidate materials. This review summarizes recent achievements in catalysts discovery for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The basic concepts of ML algorithms and practical guides for materials scientists are also demonstrated. The challenges and strategies of applying ML are discussed, which should be collaboratively addressed by materials scientists and ML communities. The ultimate integration of ML in catalyst development is expected to accelerate the design, discovery, optimization, and interpretation of superior electrocatalysts, to realize a carbon-free ecosystem based on green hydrogen.

• 한국동물위생학회지
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• 제35권4호
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• pp.327-332
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• 2012

This study aimed to see if as companion animals living with human beings, dogs could provide emotional stability or play a therapeutic role for human beings. Of 12 middle school boys as victims of school violence, 6 were assigned to the experimental group that was provided with an animal-assisted therapy program over a total of 12 sections, one section per week, 60 minutes per section, between September and November 2011, followed by post-test 1 and, one month later, post-test 2. In the experimental composition, the remaining 6 boys were assigned to the comparison group that was allowed to read freely. Analysis was performed by using the scales of depression and self-esteem, and the results showed that the experimental group provided with the animal-assisted therapy program generated more significant therapeutic effects than the comparison group. The therapeutic effects were found to persist one month after the completion of the program. Therefore, it is believed that sensitive adolescents who suffer from depression or have lost self-esteem because of school violence can significantly benefit from an animal-assisted therapy program by reducing the recovery time or by getting lots of help with emotional stability. Further research on the basis of this study is expected to help adolescents with emotional therapy in other areas.

• Journal of Advanced Marine Engineering and Technology
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• 제39권10호
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• pp.1044-1048
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• 2015

Recently, the viability of the Northern Sea Route has been receiving a remarkable amount of attention. Owing to global warming, glaciers in the Arctic Ocean have been melting rapidly, which has opened up navigation routes for ships with commercial as well as research purposes. At present, vessels can be economically operated along the Northern Sea Route four months of the year. However, studies have shown that the economical operating time may increase to six months by 2020 and year-round by 2030. Even though the conditions of the Northern Sea Route are extreme, the main reason for its use is that the route is shorter than the existing route using the Suez Canal, which provides an economic benefit. In addition, 25% of the world's oil reserves and 30% of its natural gas are stored in the coastal areas of the East Siberian Arctic region. Many factors are leading to the expectation of commercial navigation using the Northern Sea Route in the near future. To satisfy future demand, the International Maritime Organization established the Polar Code in order to ensure navigation safety in polar waters; this is expected to enter into force on January 1, 2017. According to the code, a ship needs to reduce its speed and analyze the ice for safe operation before entering into it. It is necessary to enter an ice field at a right angle to break the ice safely and efficiently. This study examined the operation along the course for safe navigation of the passage under several conditions. The results will provide guidelines for traffic officers who will operate ships in the Arctic Ocean.

• 한국IT서비스학회지
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• 제20권3호
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• pp.41-56
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• 2021

New drug discovery and development research enable clinical treatment that saves human life and improves the quality of life, but the possibility of success with new drugs is significantly low despite a long time of 14 to 16 years and a large investment of 2 to 3 trillion won in traditional methods. As artificial intelligence is expected to radically change the new drug development paradigm, artificial intelligence new drug discovery and development projects are underway in various forms of collaboration, such as joint research between global pharmaceutical companies and IT companies, and government-private consortiums. This study uses the TOE framework and the Value-based Adoption Model, and the technical, organizational, and environmental factors that should be considered for the acceptance of AI technology at the level of the new drug research organization are the value of artificial intelligence technology. By analyzing the explanatory power of the relationship between perception and intention to use, it is intended to derive practical implications. Therefore, in this work, we present a research model in which technical, organizational, and environmental factors affecting the introduction of artificial intelligence technologies are mediated by strategic value recognition that takes into account all factors of benefit and sacrifice. Empirical analysis shows that usefulness, technicality, and innovativeness have significantly affected the perceived value of AI drug development systems, and that social influence and technology support infrastructure have significant impact on AI Drug Discovery and Development systems.

• 정보처리학회지
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• 제15권2호
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• pp.15-28
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• 2008

The Korea UK e-Science Collaboration project has been aimed at supporting research and collaboration between Korean and UK researchers. Its goal is to benefit the nation by reducing cost and time in constructing the National e-Science Research Environment' by studying and benchmarking the cases in countries that have already procured advanced technologies in the area. Two joint workshops were held in a year where researchers from the two countries had the opportunities to share their research results with each other. Also, the project has supported exchanges of researchers fostering expertise in the field. In the course of the project, the e-Science Centre in the UK and KISTI have signed MoU(Memorandum of Understanding) in 2006. Moreover, there have been active research collaboration between Korea and the UK. The University of Southampton will share the BioSimGrid data with the Korean counterpart, and the University of York has provided the AURA software. In the future, KISTI and the UK NGS(National Grid Service) will organize a working group at OGF that will work mainly on the standardization of Parameter Sweep and bring it to lead the global standard. KISTI will include its own AURORA system into OMI-UK software stack, which will enable access to NGS resources through AURORA user application. The collaboration with the UK has opened up more opportunities for collaboration with other countries as well. KISTI and HLRS in Germany have agreed to share the COVISE and will have research exchanges. As such, it is expected that Korea will play a major role in e-Science research by building strategic and systematic collaborative relations with its International partners.