• Title/Summary/Keyword: Unit production cost

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Advances and Future Directions in Poultry Nutrition: An Overview

  • Ravindran, Velmurugu
    • Korean Journal of Poultry Science
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    • v.39 no.1
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    • pp.53-62
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    • 2012
  • In the past, poultry nutrition has focussed on increasing the production efficiency to meet the progress achieved in the genetic potential of broilers and layers. Future directions in poultry nutrition will be driven by not only by the need to maximise biological and economic performance of birds, but also by societal issues (environment, antibiotic growth promoters, welfare, traceability and use of genetically modified ingredients). Key advances in poultry nutrition are discussed and future directions, which can be expected, are highlighted. Given the tightening supply and ever-increasing cost of raw materials, there will be more pressure to extract every unit of energy and nutrients from feed ingredients. In this context, a number of feed additives are expected to play an increasingly significant role. Feed enzymes and crystalline amino acids, in particular, will have a profound effect on future sustainability of the poultry industry. Future nutritional research need to focus on identifying the barriers to effective digestion and utilisation of nutrients and, to achieve this objective, nutritionists must combine their expertise with those of specialising in other biological sciences, including immunology, microbiology, histology and molecular biology.

A Study on the Development of Automation Unloader for Press Metalmold (프레스 금형용 Unloader 자동화 시스템개발에 관한 연구)

  • 김재열
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 1996.10a
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    • pp.156-160
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    • 1996
  • In this study of made Unloader is moving linear transfer system for mainly plastic working or forming of small electronic unit and other at press line. This machine for lading and unloading a workpiece has been installed in a press in order to load and unload a workpiece form a press die. Control method be used PLC. it took data of input from each sensor and send signal of output to actuator today we have a lot of problem at work of press line. most of press work be operated by human so they often hurted terreble accident by press machine. Because press working system in automotive factories are now changing over to a transfer press working system this Unloader will give more easily and speedy production and manpower saving less of pruduction cost high perfomance

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Analysis of Electrical Characteristics of High-Density Trench Gate Power DMOSFET Utilizing Self-Align and Hydrogen Annealing Techniques (자기 정열과 수소 어닐링 기술을 이용한 고밀도 트랜치 게이트 전력 DMOSFET의 전기적 특성 분석)

  • 박훈수;김종대;김상기;이영기
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.16 no.10
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    • pp.853-858
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    • 2003
  • In this study, a new simplified technology for fabricating high density trench gate DMOSFETs using only three mask layers and TEOS/nitride spacer is proposed. Due to the reduced masking steps and self-aligned process, this technique can afford to fabricate DMOSFETs with high cell density up to 100 Mcell/inch$^2$ and cost-effective production. The resulting unit cell pitch was 2.3∼2.4${\mu}$m. The fabricated device exhibited a excellent specific on-resistance characteristic of 0.36m$\Omega$. cm$^2$ with a breakdown voltage of 42V. Moreover, time to breakdown of gate oxide was remarkably increased by the hydrogen annealing after trench etching.

A Study on the Demand Modelling for District Cooling Energy Source (지역냉방 열원의 수요모형에 관한 연구)

  • Kim, Jin Hyung;Choi, Byung Ryeal
    • Environmental and Resource Economics Review
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    • v.11 no.4
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    • pp.633-657
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    • 2002
  • This study presents a demand modelling for landfill gas, which is used as alternative energy source for district cooling business. By analyzing the cost minimizing behavior of producer facing with three alternative energy sources such as electricity, cooling heat water, and gas, a demand function for landfill gas is derived from the optimal operating time of gas fired production facility, and estimated using unpublished data, which are associated with Seoul city's development plan for Sang-am area. The estimation results repeals that Seoul City could supply the land-fill gas of 13.76 million cubic meters each year at the price of about 16 won per cubic meters. However, if the investment costs associated with installation of gas collecting facilities are treated as sunk costs, annual amount of gas supplied is expected to increase to 14.22 million cubic meters at a lower unit price of 14.76 won.

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An Integrated Inventory Model for a Three-Layer Supply Chain with Multiple Items (3단계 공급사슬에서 다완제품의 통합재고모형에 관한 연구)

  • Kim, Dae-Hong
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.37 no.4
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    • pp.116-125
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    • 2014
  • In this paper, we investigate an inventory and production system in a three-layer supply chain system involving a single supplier, single manufacturer and multiple retailers. Earlier study in this type of supply chain only consider a single raw material in order to produce single item, but we consider raw materials in order to produce multiple items. It is assumed that the cycle time at each stage is an integer multiple of the adjacent downstream stage. We develop an iterative solution procedure to find the order quantity for the multiple items and raw materials that minimizes the supply chain-wide total cost per unit time of the supplier and manufacturer's raw materials ordering and holding, setup and finished items holding, the retailer's ordering and inventory holding. Numerical examples are presented to show that the proposed heuristic gives good performance.

Development of Water Management System for Optimal Operation and Control in Wide-area Waterworks (광역상수도의 최적운영 및 제어를 위한 수운영시스템 개발)

  • 남의석;우천희;김학배
    • Journal of Institute of Control, Robotics and Systems
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    • v.9 no.7
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    • pp.489-497
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    • 2003
  • A water management system is developed to reduce the unit cost of production in wide-area waterworks. Improving productivity in waterworks is to save power rate. We suggest a method to schedule the supply of water according to the time-varying power rate and pump control scheme. Water pipeline analysis package (SynerGEE Water) is utilized to obtain optimal pump control solution adaptation to water demand. Our evaluation results show that developed scheme is more efficient than the conventional.

Virtual Manufacturing for an Automotive Company (II) - Constuction and Operation of a Virtual Body Shop (자동차 가상생산 기술 적용 (II) - 차체공장 가상플랜트 구축 및 운영)

  • Noh, Sang-Do;Hong, Sung-Won;Kim, Duk-Young;Sohn, Chang-Young;Hahn, Hyung-Sang
    • IE interfaces
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    • v.14 no.2
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    • pp.127-133
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    • 2001
  • Virtual Manufacturing is a technology facilitating effective development and agile production of products via computer models representing physical and logical schema and the behavior of the real manufacturing systems. For the successful application of this technology, a virtual plant as a well-designed and integrated environment is essential. We propose a series of systematic approaches and effective methods for construction and operation of a virtual plant in this paper, such as a 3-D CAD modeling, cell and line simulations and databases. We developed key technologies for measuring and 3-D CAD modeling of many equipments, facilities and structures of the buildings. In order to study the benefit of virtual manufacturing, we constructed a sophisticated virtual plant model of a Korean automotive company's body shop, and conducted precise simulations of unit cell, lines and the whole plant. We could obtain the benefit of savings in time and cost in many manufacturing preparation activities in the new car development processes.

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Design and Structural Analysis of Multi-Axis Drill M/C for PCB (PCB 다축드릴머신의 구조해석 및 설계)

  • Lee Jong-Sun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.6 no.5
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    • pp.412-417
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    • 2005
  • The objective of study is design and structural analysis of multi-axis drill machine for PCB. This is able to reduce the unit cost of manufacture and to ensure safety, that is with the result of analysis by design the multi-axis drill machine for the use of PCB to enhancing suitability and exactitude in mass production the process of PCB.

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Study for Synthetic Oil Performance Test Comparing with Mineral Gear oil in an Agitator Gear Box:Power consumption, Temperature, Oil & parts life for the Heavy load gear box in the Phosphoric Acid Plant (뉴스초점 - 광유와 합성유의 에너지 소비량, 온도변화 등의 성능시험 비교 고찰)

  • Lee, Jae Keun
    • Journal of the Korean Professional Engineers Association
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    • v.45 no.6
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    • pp.28-32
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    • 2012
  • Namhae chemical is one of the largest fertilizer manufacturing company in Korea which company has operating 4 unit agitator gear boxes and producing variety kinds of fertilizer production. The gearbox operating temperature of agitator is approximated in $55^{\circ}C{\sim}90^{\circ}C$ and required to keep operating continuous without stopping. The system required high performance oil and longer oil drain interval as limited workforce in maintenance team. It was lubricated by mineral gear oil of ISO VG 320 and also need to change to new oil frequently. Namhae Chemical would expect to keep stable operating condition without shut down and consider, lower cost of operation and equipment protection.

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Continuous Cell-Free Protein Synthesis Using Glycolytic Intermediates as Energy Sources

  • Kim, Ho-Cheol;Kim, Tae-Wan;Park, Chang-Gil;Oh, In-Seok;Park, Kyung-Moon;Kim, Dong-Myung
    • Journal of Microbiology and Biotechnology
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    • v.18 no.5
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    • pp.885-888
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    • 2008
  • In this work, we demonstrate that glycolytic intermediates can serve as efficient energy sources to regenerate ATP during continuous-exchange cell-free (CECF) protein synthesis reactions. Through the use of an optimal energy source, approximately 10 mg/ml of protein was generated from a CECF protein synthesis reaction at greatly reduced reagent costs. Compared with the conventional reactions utilizing phosphoenol pyruvate as an energy source, the described method yields 10-fold higher productivity per unit reagent cost, making the techniques of CECF protein synthesis a more realistic alternative for rapid protein production.