• Asian-Australasian Journal of Animal Sciences
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• 제10권2호
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• pp.157-163
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• 1997

This paper analyses a number of important areas relating to methane production in ruminants, consequent hazards and different methods of reducing this gas. Clearly methane not only affects on the environment but also on the economy of animal production. Several factors including feed, species, microbes, rumen environment, etc. are responsible for methane production in animals. Although methane production can be reduced by chemical manipulation, defaunation and strategic feeding, the latter was found to be effective because the method is easier to follow than the others. Furthermore, feeding technology could play an important role in reducing methane production particularly in developing countries because of its relative cost effectiveness. however, it needs to compare to what extent it could reduce methane production as well as cost of animal production. Therefore, research program needs to be concentrated on the appropriate feeding system to reduce methane production, consequently pollution and cost of production particularly in developing countries.

• 경영과학
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• 제24권1호
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• pp.63-76
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• 2007

To realize the mass customization entails the optimized supply chain design for efficiently producing and delivering the various products. In this study, we considered the problem obtaining the optimized production policy under the situation wherein the multiple products are apportioned into multiple parallel production facilities. More specifically, the production set-up costs incurs according to whether the production facilities are utilized or not. The facility-dependent set-up costs increase the problem complexity in solving the production apportioning problem for multiple products. This problem can be formulated as concave minimization problem, which is known as NP-hard problem. In this paper, a heuristic algorithm is proposed to solve two conjoint problems : one is to select the cost-effective facilities from alternative multiple production facilities and the other is to apportion the production lot to those selected facilities.

• 열처리공학회지
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• 제18권1호
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• pp.24-28
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• 2005

New post plasma nitriding can achieve a high uniformity that have been difficult in DC nitriding and have a high productivity comparable to gas nitriding. However, it has not a enough high nitriding potential for a rapid nitriding, because surface activation or ion etching in the general plasma nitriding cannot be expected. Thus, in this study, the effects of pre-treatments with oxidation and reduction gas have been investigated to improve the nitriding kinetics of post plasma nitriding. An effective pre-treatment consisting of oxidation and reduction resulted in the increase of surface energy of STD 11. This induced the surface hardness and the effective nitriding depth of STD 11. It is thought that the increase of the surface energy and the surface area with pre-treatment promote the nucleation of nitriding layer.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.58-58
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• 2022

With the development of advanced technology, automation of agricultural work is spreading. In association with the 4th industrial revolution-based technology, research on field smart farm technology is being actively conducted. A state-of-the-art unmanned automated agricultural production demonstration complex was established in Naju-si, Jeollanam-do. For the operation of the demonstration area platform, it is necessary to build a sophisticated, advanced, and intelligent field smart farming model. For the operation of the unmanned automated agricultural production demonstration area platform, we are building data on the growth of soybean for smart cultivated crops and conducting research to determine the optimal time for agricultural work. In order to operate an unmanned automation platform, data is collected to discover digital factors for water management immediately after planting, water management during the growing season, and determination of harvest time. A subsurface drip irrigation system was established for smart water management. Irrigation was carried out when the soil moisture was less than 20%. For effective water management, soil moisture was measured at the surface, 15cm, and 30cm depth. Vegetation indices were collected using drones to find key factors in soybean production prediction. In addition, major growth characteristics such as stem length, number of branches, number of nodes on the main stem, leaf area index, and dry weight were investigated. By discovering digital factors for effective decision-making through data construction, it is expected to greatly enhance the efficiency of the operation of the unmanned automated agricultural production demonstration area.

• 한국인터넷방송통신학회논문지
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• 제14권6호
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• pp.199-205
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• 2014

효과적인 중소기업 정보화를 위하여 표준화된 생산정보화 시스템 개발 방법론(PSDM)을 통하여 단계별 주요 업무에 대한 작업을 정의하고 관련 연관도를 통하여 업무에 대한 선행 및 후행 관계를 정의한 후 그에 따른 프로젝트 범위 일정 비용 인적자원 관리를 위한 최적의 업무분류체계(WBS : Work Breakdown Structure)를 연구개발 하고자한다. 시스템의 신뢰성 품질 생산성 향상을 위한 관리 항목 설정, 중소기업 IT업체 감리업체 등 참여 기업간의 의사소통, 그리고 구축된 생산정보화의 유지보수를 포함한 운영지원 등 보다 체계적이고 효율적인 시스템 구축을 위해 중소기업 생산정보화에 적합한 WBS의 연구로 생산정보화를 구축하고자 참여하는 많은 중소기업 및 IT업체들이 표준화된 방법론을 이용하여 시스템 구축을 보다 효과적으로 수행할 수 있으며, 보다 높은 신뢰성을 가진 시스템을 계획된 개발 일정에 알맞게 구축한다.

• 디지털산업정보학회논문지
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• 제9권4호
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• pp.167-175
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• 2013

This study is the process of making high-definition TV broadcast color correction affects the end result comparison is focus on implement through study. In the production process and the impact on the color Correction in the video as an study for UHD, 4K, 6K video production workflow improvement of an effective program in the present and time and cost in the post production process, color correction for the final video through the production and overcome the failure of further in-efficient color correction study will help you to solve the problem. This study is the color changes over the course of the final video to see how much influence color correction of post-production. Color correction using a program of courses in Visual quality, regularly presented the possibility to retain and make on high definition video production post-production process for color correction method is utilized as the basis of study.

• Asian-Australasian Journal of Animal Sciences
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• 제12권5호
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• pp.735-741
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• 1999

The effects of supplementation with nitrogen molasses mineral blocks and molasses urea mix during and immediately prior to the dry season on the production of dairy cows were studied on-station and on-farm near Morogoro, Tanzania. Supplementation of blocks to on-station cows also receiving ad libitum grass hay and 6 kg/d of maize bran increased milk production from 6.7 L/d to 11.2 L/d (p<0.05), increased dry matter intake from 10.1 kg/d to 12.0 kg/d (p<0.05), but did not significantly affect milk composition, intake of hay, and live weight changes. This increase in milk yield is mainly explained by increased intakes of energy and nitrogen. Supplementation with the molasses urea mix increased daily milk yield from 6.7 L/d to 8.8 L/d (p<0.05), but did not significantly affect the other measured production parameters. The on-farm supplementation of the blocks increased daily milk yield by 1.5 L/d in the dry season (p<0.05). This supplementation did not increase milk yields prior to the dry season, since quality forage was still available. Taking the production costs into account, supplementation with the blocks and supplementation with mix were cost effective if milk yields increased by 0.7 L/d. Hence supplementation with blocks and supplementation with mix were effective on-station, and supplementation with blocks was cost effective on-farm during the dry season.

• Applied Biological Chemistry
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• 제41권7호
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• pp.496-499
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• 1998

Caffeine으로부터 theobromine을 생산하기 위하여 토양으로부터 theobromine 생산능력이 있는 5종의 균주를 선별하였다. 그들 중 CT-017 균주가 theobromine 생산능력이 가장 우수하였으며 Pseudomonas sp.로 부분동정되었다. Theobromine 생산에 있어서, 탄소원과 질소원으로는 5 g/l fructose와 5 g/l beef extracts가 가장 우수하였으며, 0.02 g/l $Fe^{2+}$, threonine 1.0 g/l을 사용하였을 때 가장 효과적이었다. 최적배양온도 및 초기 pH는 각각 $28^{\circ}C$ 및 6.5이었다. 상기의 최적조건하에서, 23시간 배양하였을 때, 15 g/l caffeine으로부터 7.98 g/l의 theobromine이 생산되었으며 이때의 전환율은 53.2% 이었다.

• 한국엔터테인먼트산업학회논문지
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• 제13권7호
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• pp.135-143
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• 2019

본 연구는 영화 현장에 실습 중심의 대학 교육의 현황과 그에 대한 환경을 분석하고 수요자인 학생의 만족도를 상황 분석 차원에 조사 분석한 후, 새로운 또는 개선된 실무 중심 실습 교육의 효과적 발전 방안을 제언하고 있다. 최근 학령인구의 급격히 감소하는 교육 상황에서 주입식 교육의 새로운 돌파구의 일환으로 예술 교육의 도입, 현장 자율 학습, 실무 중심의 실험실습 등의 교육에 대한 학생들의 만족도가 높아지고 있는 것이 현실이다. 그런데 트렌드에 비해 실무 교육과 창의적인 교육의 프로그램이 많이 부족한 것이 현실이다 본 연구 논문은 영화 영상 제작에서 나타는 제작 실습을 중심으로 수요자인 학생들의 만족 패턴과 교육 프로그램을 조사·연구하여 패러다임을 구축하고자 한다. 또한 패러다임 구축을 통하여 교육의 효과적인 발전 방안을 분석, 연구, 돌출하고 그 방안을 토대로 영상 제작 교육에 대한 방향을 제시하고자 한다.

• Industrial Engineering and Management Systems
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• 제11권2호
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• pp.170-175
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• 2012

In this paper, a procedure using a genetic algorithm (GA) and a heuristic local search (HLS) is proposed for solving facility rearrangement problem (FRP). FRP is a decision problem for stopping/running of facilities and integration of stopped facilities to running facilities to maximize the production capacity of running facilities under the cost constraint. FRP is formulated as an integer programming model for maximizing the total production capacity under the constraint of the total facility operating cost. In the cases of 90 percent of cost constraint and more than 20 facilities, the previous solving method was not effective. To find effective alternatives, this solving procedure using a GA and a HLS is developed. Stopping/running of facilities are searched by GA. The shifting the production operation of stopped facilities into running facilities is searched by HLS, and this local search is executed for one individual in this GA procedure. The effectiveness of the proposed procedure using a GA and HLS is demonstrated by numerical experiment.