• Title/Summary/Keyword: correct concept

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Implementation of Finite Capacity-Driven MRP-C System (한정된 제조자원능력을 고려한 MRP-C 시스템 적용)

  • 김동규;박재현;강경식
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.22 no.51
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    • pp.117-127
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    • 1999
  • Modern production control systems based on MRPⅡ (Manufacturing Resource planning) didn't solved about the capacity and lead time problems. In the past, It solved that problems under deterministic. Therefore, the problem about determination of correct lead time and finite capacity are studied continuously by researchers. Now, we need to a integrated method that is from low level to high level instead of top-down in MRP. In this research uses the MRP-C(Capacitated Material Requirement Planning) concept that is more efficient then MRP system for capacity and flexible lead time , and shows the MRP-C algorithm and the prototype.

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Redundancy Analysis Simulation for EDS Process (EDS 공정에서 Redundancy Analysis 시뮬레이션)

  • 서준호;이칠기
    • Journal of the Korea Society for Simulation
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    • v.11 no.3
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    • pp.49-58
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    • 2002
  • It takes 2 or 3 months to manufacture memory device. Defect has to exist owing to hundreds of processes. If there are too many defects, the memory has to be rejected. But if there are a few defects, it will be more efficient and cost reducing for the company to use it by repairing. Therefore, laser-repair process is needed for such a reason and redundancy analysis is needed to establish correct target of laser-repair process. The equipment development company had provided the redundancy analysis and each development company had developed and provided separately. So, to analyze the similar type of defects, redundancy analysis time can be very different by the manufacture. The purpose of this research is to strengthen the competitive price and to apply correlation concept in business for reducing the redundancy analysis time to repair the defects

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Effect of a Macroscopic Fluctuation in Pulling Rate on the Formation of OSF-ring Cz-Si SIngle Crystal (초크랄스키 실리콘 단결정에서 인상 속도의 거시적 변동이 OSF-링 형성에 미치는 영향)

  • Park, Bong-Mo;Seo, Gyeong-Ho;Kim, Gun
    • Korean Journal of Crystallography
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    • v.11 no.3
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    • pp.157-161
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    • 2000
  • In a 200nm Cz-Si crystal, a macroscopic fluctuation in pulling rate was intentionally introduced an then the variations of the pulling rate and the position of OSF-ring were compared each other. The formation behavior of OSF-ring in the effective volume, defined as the region between the growth interface position -α and the growth interface position +α, is most affected by the pulling rate fluctuation. To understand the correct effect of a macroscopic pulling rate fluctuation, its cumulative effect in the effective volume should be considered. A new concept of modeling for it was proposed here.

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Analysis of compressor muffler using transmissibility (전달률을 이용한 압축기용 소음기 해석)

  • 신강식;김상명;조용훈
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2003.05a
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    • pp.713-718
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    • 2003
  • The common practice to reduce the compressor noise is installing a muffler. The noise reduction performance of the muffler is the most critical one for the total noise characteristics of the compressor. In this paper, a simple impedance approach using the concept of transmissibility is employed for the acoustic analysis of the muffler, It is known that transmissibility is directly related to insertion loss, and thus transmissibility can Indicate the correct performance of the muffler. The analysis result is supported by a Finite Element Model. In addition, some experiments conducted also show that the transmissibility is mildly related to the measured sound pressure outside the compressor.

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The Importance of Using Correct Names in Taxonomy - A Case Study of "The Genera of Vascular Plants of Korea" and Other Recent Published Literature in Korea

  • Chang, Kae Sun;Chang, Chin-Sung
    • Journal of Korean Society of Forest Science
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    • v.98 no.5
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    • pp.524-530
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    • 2009
  • We scrutinized the Korean taxonomic literature, with special focus on some nomenclatural points and four different cases were listed categorically. Several naked names (nomen nudum), invalidly published names, typographical and orthographical errors, incorrect use of hybrid names and authorship, and errors in the citation of the bibliographic references have appeared in newly published literature in Korea, due to misapplications of ICBN (International Code of Botanical Nomenclature). Although literature review and synonyms are imperative and essential elements of taxonomic study, many author citations tend to be copied from one publication to another without any confirmation of the original source. It is strongly recommended that scientists who have previously published careless work should be more careful, and they should be instructed to read original descriptions and to learn current practices in the code.

A Study on Fuzzy Wavelet Basis Function for Image Interpolation

  • Byun, Oh-Sung;Moon, Sung-Ryong
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • v.4 no.3
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    • pp.266-270
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    • 2004
  • The image interpolation is one of an image preprocessing process to heighten a resolution. The conventional image interpolation used much to concept that it put in other pixel to select the nearest value in a pixel simply, and use much the temporal object interpolation techniques to do the image interpolation by detecting motion in a moving picture presently. In this paper, it is proposed the image interpolation techniques using the fuzzy wavelet base function. This is applied to embody a correct edge image and a natural image when expand part of the still image by applying the fuzzy wavelet base function coefficient to the conventional B-spline function. And the proposal algorithm in this paper is confirmed to improve about 1.2831 than the image applying the conventional B-spline function through the computer simulation.

Re-organization of Parametric epidermis (파라메트릭 표피 재 조직화)

  • Park, Jeong-Joo
    • Proceedings of the Korean Institute of Interior Design Conference
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    • 2008.05a
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    • pp.46-49
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    • 2008
  • This research does Complexity form, Interior epidermis cell re-organization, Object discovery that have correct numerical value concept by purpose. Research applied by Grid re-organization in form generation, Parameter variation of cell unit (morphor, tweener), Symbol, pattern of variation, self-organization cell substitution order. Representation through 3d digital modeler of polygon, Nurbs and street-sheet program(x,y,z coordinates & Network way of points) etc. of main work. Investigator specified numbers of U profiles*30, V point-20 that is 600 Paramaters individual in volume, and define circle radius of lighting in object, Projection size variously and tried difference. Transposition cell to point and Heightened brightness of color using pointillism of painting. Led lighting cell object is expressed being decoded by digital code.

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A Study on Configuration Design of the 2D Course Correction Munition (2D 탄도수정탄의 형상설계 연구)

  • Kim, Ki-Pyo;Chung, Myung-Jee;Hong, Jong-Tai
    • Journal of the Korea Institute of Military Science and Technology
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    • v.11 no.4
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    • pp.5-12
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    • 2008
  • There are some ways to improve precision of conventional munitions by low-cost method. 2D Course Correction Munition(CCM) is one of those ways, which is a 155mm projectile integrated with 2D Guidance Fuze(GF) instead of conventional fuze. 2D GF can correct the projectile trajectory and minimize range and deflection errors from its aimpoint using canard control. In this paper 2D CCM system concept is introduced and its course correction capability is analyzed using PRODAS.

Generation of GCP Chip in Landsat-7 ETM+

  • Yoon, Geun-Won;Yun, Young-Bo;Park, Jong-Hyun
    • Proceedings of the KSRS Conference
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    • 2002.10a
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    • pp.29-33
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    • 2002
  • In order to utilize remote sensed images widely, it is necessary to correct geometrically. Traditional approaches to geometric correction require substantial human operations. Such substantial human operations make geometric correction a laborious and tedious process. In this paper, We introduce concept of GCP(Ground Control Point) Chip and generate a GCP Chip for automatic geometric correction. GCP Chip is small image patch which has a GCP in reference coordinate image. GCP Chip will be used to match new images in geometric correction. We generated GCP chip using Landsat-7 ETM+ panchromatic band image in this study. Henceforth this result will support automatic process in geometric correction.

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Effect of upper thoracic mobilization on cervical alignment in stroke patients with forward head posture: A case study

  • Park, Sin Jun;Park, Si Eun
    • Journal of International Academy of Physical Therapy Research
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    • v.9 no.2
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    • pp.1513-1516
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    • 2018
  • The purpose of this study was to identify the effect of upper thoracic mobilization on cervical alignment in stroke patients with forward head posture. The subject's of this study were two stroke patients with forward head posture and a cervical curve angle (four-line Cobb's method; FLCM) less than $40^{\circ}$. The intervention, central posterior-anterior (PA) mobilization, was applied to the T1-T4 vertebrae (upper thoracic spine) following the Maitland concept. This mobilization was applied three times per week for four weeks. In the results, the cervical curve angle (FLCM) increased for both subject 1 and 2. However, Jochumsen method score was decreased in subject 1, while it was increased in subject 2. These results demonstrate that upper thoracic mobilization had the positive effect on the cervical curve angle but not on Jochumsen method score. These findings suggest that PA mobilization on the upper thoracic spine could correct cervical curve angle measured by FLMC in stroke patients with FHP.