• Title/Summary/Keyword: quick evaluation

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Hybrid-QUICK Scheme Using Finite-Volume Method

  • Choi, Jung-Eun
    • Journal of Hydrospace Technology
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    • v.2 no.2
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    • pp.57-67
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    • 1996
  • The formulation for hybrid-QUICK scheme of convective transport terms in finite-volume calculation procedure is presented. Source terms are modified to apply the hybrid-QUICK scheme. Test calculations are performed for wall-driven cavity flow at Re=$10_2$, $10_3$, and $10_4$. These include the evaluation of boundary conditions approximated by third-order finite difference scheme. The stable and converged solutions are obtained without unsteady terms in the momentum equations. The results using hybrid-QUICK scheme show no difference with those using hybrid scheme at low Re ($=10_2$) and are better at higher Re ($10_3$, and $10_4$).

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Quick Evaluation of Spacecraft Orbit Maneuver Using Small Sets of Real-time GPS Navigation Solutions

  • Lee, Byoung-Sun;Lee, Ho-Jin;Lee, Seong-Pal;Kim, Jong-Ah;Park, Hae-Jin
    • 제어로봇시스템학회:학술대회논문집
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    • 2000.10a
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    • pp.458-458
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    • 2000
  • Quick evaluations of two in-plane orbit maneuvers using small see of real-time CPS navigation solutions were peformed lot the KOMPSAT-1 spacecraft operation. Real-time GPS navigation solutions of the KOMPSAT-1 were collected during the Korean Ground Station(KGS) pass. Only a few sets of position and velocity data after completion of the thruster firing were used for the quick maneuver evaluations. The results were used for antenna pointing data predictions for the next station contact. Normal orbit maneuver evaluations using large see of playback GPS navigation solutions were also performed and the result were compared with the quick evaluation results.

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Evaluation of Railroad Restoration Technology using Quick-reaction Expansible Resins (급속 팽창성 수지를 이용한 철로침하 복원공법의 평가)

  • Shin, Eun-Chul;Son, Won-Ik;Kim, Sung-Hwan;Kan, Hyoun-Hoi
    • Proceedings of the KSR Conference
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    • 2007.05a
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    • pp.1789-1795
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    • 2007
  • Railroad, the structure maintenance and restoration project was increased and widely performed in concrete pavement road and airport, building at downtown area, bridge abutment, and other concrete structures. Especially, the ground reinforcement technique by quick-reaction expansible resins is the most effective countermeasures against differential settlement and undesired deformation of structure. In this paper, the unconfined compressive strength and some environmental related tests were conducted to evaluate compressive strength and environmental effect of quick-reaction expansive resins and soil mixtures. Also, three case histories of concrete structure and railroad restoration project are presented. Based on the laboratory test, the quick-reaction expansible resins and soil mixture represent the sufficient compressive strength and the leachate material is satisfied the environmental regulation limits. As a result of this study, the structure restoration technology using quick-reaction expansible resins is very effective for restoration of differential settlement and deformation, and it is environmentally sustainable technology.

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Evaluation of Convection Schemes for Thermal Hydraulic Analysis in a Liquid Metal Reactor (액체금속로 내부 열유동해석을 위한 대류항처리법 평가)

  • Choi Seok-Ki;Kim Seong-O;Kim Eui-Kwang;Eoh Jae-Hyuk;Choi Hoon-Ki
    • 한국전산유체공학회:학술대회논문집
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    • 2002.10a
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    • pp.64-69
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    • 2002
  • A numerical study has been peformed for evaluation of convection schemes for thermal hydraulic analysis in a liquid metal reactor Four convection schemes, HYBRID, QUICK, SMART and HLPA included in the CFX-4 code are considered. The performances of convection schemes are evaluated by applying them to the five test problems. The accuracy, stability and convergence are tested. It is shown that the HYBRID scheme is too diffusive, and the QUICK scheme exhibits overshoots and undershoots, and the SMART scheme shows convergence oscillations, and the HLPA scheme preserves the boundedness without causing convergence oscillations. The accuracies of SMART, QUICK and HLPA schemes are comparable. Thus, the use of HLPA scheme is highly recommended for thermal hydraulic analysis in a liquid metal reactor.

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Quick Evaluations of the KOMPSAT-1 Orbit Maneuvers Using Small Sets of Real-time GPS Navigation Solutions

  • Lee, Byoung-Sun;Lee, Jeong-Sook;Kim, Jae-Hoon
    • Transactions on Control, Automation and Systems Engineering
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    • v.3 no.3
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    • pp.196-202
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    • 2001
  • Quick evaluations of two in-plane orbit maneuvers using small sets of real-time GPS navigation solutions were performed for the KOMPSAT-1 spacecraft operation. Real-time GPS navigation solutions of the KOMPSAT-1 were collected during the Korean Ground Station(KGS) pass. Only a few sets of position and velocity data after completion of the thruster firing were used for the quick maneuver evaluations. The results were used for antenna pointing data predictions for the next station contact. Normal orbit maneuver evaluations using large sets of playback GPS navigation solutions were also performed and the result were compared with the quick evaluation results.

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A Study on Improving the Quick Six Sigma of Posco (포스코의 Quick Six Sigma 개선에 관한 연구)

  • Woong, Yoon Tae;Lee, Min Jung
    • Proceedings of the Korean Society of Computer Information Conference
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    • 2017.07a
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    • pp.178-179
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    • 2017
  • 우리나라의 최대 철강회사인 포스코는 2005년부터 품질개선을 위해서 포스코 자체의 혁신방법론인 QSS+(Quick Six Sigma)을 개발하여 실시하고 있다. QSS+는 회사 전체 직원이 개선 실천 학습을 하고, 지속적인 낭비제거를 통해 부가가치를 창출하는 활동으로 '일상개선 활동, 과제 활동, 솔선/격려활동, 인재양성' 4개의 축으로 운영되고 있다. 또한 QSS+는 오랜 시간에 걸쳐 정착되어 정부 기관, 기업, 그룹사, 외주파트너사, 공급사 및 다양한 분야에서 우수 혁신 활동 사례로 벤치마킹을 실시하고 있다. 매년 현장에서 활동하는 포스코 QSS+ 현 수준을 정확히 판단하고 향후 방향성을 제시하는 QSS+ 충실도 평가 기준을 개선하기 위하여 AHP 분석 방법을 통해 평가 항목을 분석하고 현장이 반영된 'QSS+ 평가 기준'을 제시하고자 한다.

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The Clinical Pathology Characteristics and Tetanus Quick Stick Evaluation for Tetanus Patients in Daegu Emergency Medical Center

  • Lee, Seung Jin;Lim, Soon Ok;Jeong, Jae Yeop;Park, Min Jeong;Park, Ju Eun
    • Korean Journal of Clinical Laboratory Science
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    • v.46 no.1
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    • pp.12-16
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    • 2014
  • Tetanus has high lethality and can cause serious complication, so it is very important to have a quick and exact checkup and treatment. In this study, we conducted a study about clinical characteristics and types of tetanus patients in Daegu Emergency Medical Center and we studied possibility of Tetanos Quick Stick (TQS) as a selective check up to treat tentanus by comparing the results of local checkup kit measured from tetanus quick stick developed to check up tetanus antibody titer and results measured from ELISA (Enzyme-Linked Immunosorbent Assay). The result of the study showed that tetanus happens more to males, and by looking at season, tetanus happened most in summer (from June-August) as 19 cases (45.3%), and when patients come to the emergency medical center, the diagnosis name was electrolyte imbalance 14 cases (33.3%), peripheral nerve 11 cases (26.2%), Meningitis 8 cases (19.0%), drug addiction 7 cases (16.7%), and the patients who are diagnosed as tetanus at the beginning of hospitalization was 2 cases (4.8%). The result of TQS usefulness by comparing with ELISA, in TQS, 42 people was positive and 478 people was negative. it was positive when the result was over 0.1 IU/mL, 48 people was ELISA positive while 472 people was negative. TQS checkup has accuracy of 98%, sensitivity of 83.3%, specificity of 99.5%, positive predictability of 95.2% and negative predictability of 98.3%. The evaluation of current immunity statuses of tetanus patients is available for TQS checkup, and it has an advantage of preventing side effects coming from the injection of unnecessary vaccine and immunoglobulin, and it is thought that it can give help to emergency checkup and treatment at the beginning.

Quick evaluation for cement powder of synthesize with the hydrometer density value and change temperature (Hydrometer의 밀도 값과 혼탁액 온도를 복합한 포틀랜드 시멘트의 분말도 신속 평가)

  • Lee, Jae-Jin;Han, Jun-Hui;Hyun, Seong-Yong;Kim, Yeong-Tae;Han, Min-Cheol;Han, Cheon-Goo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2018.05a
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    • pp.87-88
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    • 2018
  • The change in the degree of powder in cement is very important because it plays a major role in the reaction in the concrete. In this study, we intend to apply the principle of early estimation of concrete strength using the non-middling method previously conducted to the quality evaluation of cement powder. In other words, it is proposed to analyze the potential of Hydrometer density values and the data of temperature variation in the trust solution to propose a method of acceptance inspection. According to the experimental results, the quick evaluation of the cement distributorship will be possible if the resulting regression results are used : y = 161867.4 x1 + 117.953 x2 - 165437 (R = 0.9158).

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Performance Evaluation and Design of DTMF Receiver with a Subset of $2^M$ Data Point

  • Kye, Sung-Su;Lee, Jae-Kyung;Yoon, Dal-Hwan;Min, Seung-Gi
    • 제어로봇시스템학회:학술대회논문집
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    • 2003.10a
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    • pp.1638-1642
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    • 2003
  • In this paper, we have analyzed the power spectra and evaluate the performance of DTMF receiver by using the quick Fourier transform(QFT) algorithm. The economical signals detection of dual-tone multifrequency(DTMF) receiver is an important factor when developing cost-effective telecommunication equipment. In experimental results, it shows that reducing memory waste and can process the real-time.

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EVALUATION OF SPATIAL SOIL LOSS USING THE LAND USE INFORMATION OF QUICKBIRD SATELLITE IMAGERY

  • Lee, Mi-Seon;Park, Jong-Yoon;Jung, In-Kyun;Kim, Seong-Joon
    • Proceedings of the KSRS Conference
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    • 2007.10a
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    • pp.274-277
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    • 2007
  • This study is to estimate the spatial distribution of soil loss using the land use data produced from QuickBird satellite imagery. For a small agricultural watershed (1.16 $km^2$) located in the upstream of Gyeongan-cheon watershed, a precise agricultural land use map were prepared using QuickBird satellite image of April 5 of 2003. RUSLE (Revised Universal Soil Loss Equation) was adopted for soil loss estimation. The data (DEM, soil and land use) for the RUSLE were prepared for 5 m and 30 m spatial resolution. The results were compared with each other and the result of 30 m Landsat land use data.

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