• Title/Summary/Keyword: Cutting Stage

Search Result 335, Processing Time 0.025 seconds

A Study on Global Compliance of Global Companies under the Circumstance of Export Control (전략물자 무역환경에 따른 글로벌기업의 글로벌 컴플라이언스에 관한 연구)

  • Choi, Choon-Ho
    • THE INTERNATIONAL COMMERCE & LAW REVIEW
    • /
    • v.39
    • /
    • pp.367-389
    • /
    • 2008
  • On the stage of an international trade with well-developed transportation, communication system and proliferation of free trade, global companies who are eager to sustain business growth by cutting cost and pioneering new market are facing a new challenge named "Global Compliance" of business transparency, export and import regulations, and potential international business environment. The purpose of a global compliance is to monitor and regulate a company's trade activities to reduce the risk of transactions that might violate relevant countries' laws, regulations, or standards. After the 911, for strengthening the non-proliferation of the export control goods, UNSCR1540(United Nations Security Council Resolution 1540(2004)) was declared in order to enforce the members to adopt the rules in the resolution into their national laws and regulations. Companies does not realized that they need to get rid of the risks because they underestimate the importance of international security, caused by their careless management. That is why currently the export control program is not fully observed by the most. Lack of awareness for the export control and the poor system of each members could be the reason for this unstable operating status. With this background, this thesis will study on the meaning of export control, schemes for companies to recognize its importance and governmental guideline to support global companies.

  • PDF

Performance, Wrist Motion and Subjective Rating for Handle Angle of Pliers (손잡이가 휜 Plier의 작업 수행도, 손목 동작과 만족도 평가)

  • Kee, Do-Hyung
    • Journal of the Ergonomics Society of Korea
    • /
    • v.27 no.2
    • /
    • pp.49-57
    • /
    • 2008
  • This study aims to investigate the effect of handle angles of pliers on performance, wrist motion and subjective rating of satisfaction. An experiment was conducted, in which handle angle of pliers was used as independent variable and 14 subjects participated. Based on the literature survey, plier handles angled at 0$^{\circ}$, 10$^{\circ}$, 20$^{\circ}$, 30$^{\circ}$ and 40$^{\circ}$ were adopted in the experiment. The subjects were instructed to bend iron plates by 90$^{\circ}$ and to cut wires as soon as possible. The results revealed that 1) handle angles of pliers have significant effect on wrist motion and satisfaction(p<0.0001); 2) handle angles of pliers did not affect performance of completing tasks irrespective of types of tasks done in the study; 3) in the initial stage of windup, plier with handle angled at 20$^{\circ}$ produced the least wrist motion of deviation in task of bending iron plates, while plier with handle angled at 40$^{\circ}$ did in task of cutting wires; 4) degree of satisfaction was maximized when handle of pliers was bent by 20$^{\circ}$ in both tasks. On the basis of the results, it is recommended that handle of pliers be bent by 20-30$^{\circ}$ for reducing musculoskeletal disorders related to pliers.

A Study on Verification and Editing of NC Part-program (NC파트프로그램의 검증 및 오류 수정에 관한 연구)

  • 김찬봉;박세형;양민양
    • Transactions of the Korean Society of Mechanical Engineers
    • /
    • v.17 no.5
    • /
    • pp.1074-1083
    • /
    • 1993
  • NC simulation has been used to replace the test cutting of NC machining. Although it can reduce the NC part programming effort, it still has a problem. If any error is found during the simulation, then the part has to be reprogrammed and it is time consumming. This paper presents a method for verifying and editing the NC code after the post-processing without going back to the part programming stage. A data structure and an algorithm to verify and edit the NC code interactively with the aid of graphics is introduced. Z-map method is used for the shaded image display and cross-sectional view display of the macined parts. The method was implemented in a IBM/PC-386 with MS-Windows software, and the multi-window function of the of the MS-Windows is used for the simultaneous editing and verification.

A Study on Current Issues for the Realization of u-City (u-City 구현을 위한 현안과제 조사분석)

  • Kim, Jung-Hoon;Yi, Mi-Sook
    • Spatial Information Research
    • /
    • v.15 no.1
    • /
    • pp.1-14
    • /
    • 2007
  • u-City is a new concept and phenomena of applying Information & Communications Technology(ICT) into real cities in Korea. In order to effectively integrate a city with high-tech ICT infrastructure, cutting-edge ICT is being integrated into physical urban environments from the planning and construction stage of a city. There are positive expectations regarding its effect on urban planning and citizens' lives. However, construction of u-city has technical limitations as well as institutional obstacles. This paper aims at identifying problems of current u-city practices and suggesting appropriate solutions for those problems. To do so, it first collects opinions from diverse experts. Then, it draws problems and suggests solutions in terms of u-infrastructure, u-service, policy and implementation process.

  • PDF

A Study on the Improvement of Reinforcing Bar Detailing (국내 철근공사 배근상세 개선방안에 관한 연구)

  • Park, U-Yeol;Kim, Baek-Jung;Jung, Hyun-Ok;Yun, Seok-Heon;Cho, Hun-Hee;Kang, Kyung-In
    • Journal of the Korea Institute of Building Construction
    • /
    • v.8 no.1
    • /
    • pp.83-90
    • /
    • 2008
  • The reinforcing steel process is composed of the development of placing drawing, cutting and bending, and the placement and fabrication of the reinforcement, and is participated in by reinforcement detailer, the fabricator and placer. Because the reinforcing steel process-from estimating and rebar detailing, to production, material tracking, billing, and general accounting-is conducted by many participant, reinforcement details based on building code and reinforcing bar detailing standards are essential. The process, however, holds some problems. Building code has been revised recently, and the utilization of placing drawings was proved to be low, and the reinforcement estimating in early stage of the process is below what is required for placement. Therefore, in this study, a survey was conducted to the reinforcement detailer, the fabricator and placer of domestic construction industry. According to the analysis of the survey, the reinforcement details on site was not standardized. The improvement in reinforcing steel detailing standards was sought by analyzing the results of the survey including reinforcement constructability.

Effects of Nitrogen Fertilization Levels and Some Additives on the Chemical Composition and Silage Quality of Forage Rape (Brassica napus Subsp. oleifera) I. Effects of harvestinh dates and N forage rape (질소시비수준과 첨가제가 사초용 유채의 사료가치 및 사일리지의 품질에 미치는 영향 I. 예취시기 및 질소시비수준이 수량 및 사료가치에 미치는 영향)

  • 조무환;김동암
    • Journal of The Korean Society of Grassland and Forage Science
    • /
    • v.8 no.1
    • /
    • pp.33-39
    • /
    • 1988
  • Insufficient herbage during the fall in the temperate areas of the world has been a serious limitation in animal production, but leafy brassicae are potentially very useful for extending the grazing season when the growth and quality of grass is poor. This study was conducted to determine the effects of cutting stage and N fertilization on dry matter (DM) yield, forage quality and chemical composition of forage rape (Brassica napus Subsp. oleifera). The experiment was conducted in the Experimental Livestock Farm of Seoul Nat'l Univ., at Suweon, during 1985- 1986. The results obtained are summarized as follows: 1. DM percentage and yield significantly increased as the growth period was prolonged and decreased as the N fertilization increased, but in-vitro dry matter digestibility (IVDMD) was unaffected by the treatments. 2. Plant height, DM yield and $NO_3$-N content significantly increased as the rate of N fertilization increased and DM percentage decreased, but the IVDMD was unaffected. 3. The forage rape had high percentage of crude protein and ash. Glutamic acid, pro!ine and aspartic acid were the major amino acids. Concentration of P, Ca and Mg were high.

  • PDF

A Study on the Truing of Diamond Wheel for Micro V-shaped Groove Grinding (마이크로 V홈 연삭가공을 위한 다이아몬드숫돌의 V형상 트루잉에 관한 연구)

  • Lee, Joo-Sang
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.22 no.9 s.174
    • /
    • pp.27-33
    • /
    • 2005
  • This study deals with the truing of diamond wheel fur the manufacture of micro v-shaped grooves with fine sharp edges in the grinding. Fine micro v-shaped grooves are key components to fabricate LGP(light guide plate), optical fiber connector and so on. Conventional v-shaped groove methods such as etching and lithography are difficult to make grooves with accuracy and cutting by lathe is difficult to select target materials. Therefore, as a preliminary stage to developing the grinding technology that will be expected fabrications for micro 3-dimensional structure of high effectivity and accuracy and freed up the restrictions of machinability to the materials for micro v-shaped grooves, truing is carried out with resin bond diamond wheel and electroforming diamond wheel using a cup-type truer. From the experimental results, it is found that the effects according to working direction of the cup-type truer and the restrainable methods of plastic deformation that is generated at wheel edge are examined. As a result, fine micro v-shaped diamond wheel was obtained, which are applicable to micro grinding for optical devices.

A Study on the Quantitative Analysis of Cutting Parameters and Prediction Model for Surface Roughness in Milling (밀링가공에서 표면거칠기에 대한 절삭인자의 정량적 분석과 예측모델에 관한 연구)

  • Jang, Sung-Min;Kang, Shin-Gil
    • Journal of the Korean Society of Manufacturing Process Engineers
    • /
    • v.16 no.3
    • /
    • pp.125-130
    • /
    • 2017
  • In this study, the influence of various factors on surface roughness was investigated using the Taguchi experimental method through high-speed machining processing. Feed rate, pitch, tool diameter, and depth of cut are widely applied to high-speed machining conditions for mold production. Each of these factors was implemented and classified into three levels; then, after high speed machining, surface roughness was measured, the S/N ratio was analyzed, and the influence on the surface roughness of control factors was analyzed quantitatively by ANOVA. Using this information, a mathematical model for predicting surface roughness was derived from multiple regression analysis. This mathematical model enables the surface roughness value after high-speed machining to be predicted at the production stage, before machining, for a wide range of machining conditions.

A new paradigm for cancer therapeutics development

  • Kim, Soo-Youl
    • BMB Reports
    • /
    • v.43 no.6
    • /
    • pp.383-388
    • /
    • 2010
  • The number of cancer patients has increased due to longer life spans and treatment has become a universal problem. Since molecular-targeted therapies were introduced as a new developmental strategy, certain targets have been examined hundreds of times, with developers overlapping their research efforts. We need to focus our energy and resources on novel drug candidate identification and optimization, in order to enhance the entry of early-stage drug candidates into the therapeutics pipeline. This presents a major opportunity for Korea to jump the decades-old development gap between our programs and those that are more advanced in other countries. Although this country does not have a specific center for validation and development of cancer therapeutics, we do have cutting-edge scientists performing research in many institutions. In this paper, I will review cancer drug development in Korea and suggest future directions, while urging colleagues to utilize their networking expertise so we can move toward a new paradigm of novel therapeutics development. An example of such efforts has begun with the Drug Development Consortium, which was described in the KSBMB chapter. This consortium was launched in 2010 by biochemists, chemists, cell and molecular biologists and pharmacologists. It is clear that effective cancer therapeutics will be developed more efficiently when we all strive for the same goal.