• Title, Summary, Keyword: Turnaround time

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Low-Cost Design for Repair by Using Circuit Partitioning (회로 분할을 사용한 저비용 Repair 기술 연구)

  • Lee, Sung-Chul;Yeo, Dong-Hoon;Shin, Ju-Yong;Kim, Kyung-Ho;Shin, Hyun-Chul
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.47 no.5
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    • pp.48-55
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    • 2010
  • As the complexity and the clock speed of semiconductor integrated circuits increase, silicon validation becomes important. In this research, we developed new post-silicon repair & revision techniques to reduce cost and time-to-market. Spare cells are fabricated with the original design and are used for repair when necessary. The interconnections are modified by repair layer revision. The repair cost can be reduced by logic partitioning. Experimental results show that these techniques are effective for low-cost and fast turnaround repair.

A Study on the Resource Allocation Strategies of the Container Terminals Using Simulation Technique (시뮬레이션 기법을 이용한 컨테이너 터미널의 자원할당 전략에 관한 연구)

  • 장성용
    • Journal of the Korea Society for Simulation
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    • v.8 no.4
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    • pp.61-72
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    • 1999
  • This paper presents an estimation method of container handling capacity and selection of resource allocation strategies of container terminals using the computer simulation models. Simulation models are developed to model container terminal consisting of 4 berths considering the berth allocation strategies, crane allocation strategies and the total number of container cranes using Arena simulation package. The proposed models do not consider the yard operations and gate operations. All the input parameters for the models are estimated on the basis of the existing container terminal operation data and the planning data for the automated container terminal planned by Korean government. Four berth allocation strategies and three crane allocation strategies are considered. The total number of container cranes considered ranges from 12 to 15. Non-terminating simulation techniques are utilized for the performance comparison among alternatives. The performance measures such as average ship turnaround time, average ship waiting time, average ship service time, the number of containers handled per year, and the number of ships processed per year are used. The result shows that the berth allocation strategy minimizing the sum of the number of ships waiting, the number of busy container cranes and number of ships handled performs better than any other berth allocation strategies. In addition, the crane allocation strategy allocating up to 5 container cranes per berth performs better than any other crane allocation strategies. Finally there are no significant performance differences among the alternatives consisting of different total number of container cranes allocated.

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A Name-based Service Discovering Mechanism for Efficient Service Delivery in IoT (IoT에서 효율적인 서비스 제공을 위한 이름 기반 서비스 탐색 메커니즘)

  • Cho, Kuk-Hyun;Kim, Jung-Jae;Ryu, Minwoo;Cha, Si-Ho
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.19 no.6
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    • pp.46-54
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    • 2018
  • The Internet of Things (IoT) is an environment in which various devices provide services to users through communications. Because of the nature of the IoT, data are stored and distributed in heterogeneous information systems. In this situation, IoT end applications should be able to access data without having information on where the data are or what the type of storage is. This mechanism is called Service Discovery (SD). However, some problems arise, since the current SD architectures search for data in physical devices. First, turnaround time increases from searching for services based on physical location. Second, there is a need for a data structure to manage devices and services separately. These increase the administrator's service configuration complexity. As a result, the device-oriented SD structure is not suitable to the IoT. Therefore, we propose an SD structure called Name-based Service-centric Service Discovery (NSSD). NSSD provides name-based centralized SD and uses the IoT edge gateway as a cache server to speed up service discovery. Simulation results show that NSSD provides about twice the improvement in average turnaround time, compared to existing domain name system and distributed hash table SD architectures.

Croup Load Balancing Algorithm Using State Information Inference in Distributed System (분산시스템에서 상태 정보 추론을 이용한 그룹 부하 균등 알고리즘)

  • 정진섭;이재완
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.6 no.8
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    • pp.1259-1268
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    • 2002
  • One of the major goals suggested in distributed system is to improve the performance of the system through the load balancing of whole system. Load balancing among systems improves the rate of processor utilization and reduces the turnaround time of system. In this paper, we design the rule of decision-making and information interchange based on knowledge based mechanism which makes optimal load balancing by sharing the future load state information inferred from past and present information of each nodes. The result of performance evaluation shows that utilization of processors is balanced, the processing time is improved and reliability and availability of systems are enhanced. The proposed mechanism in this paper can be utilized in the design of load balancing algorithm in distributed operating systems.

MRA AND POD APPLICATION FOR AERODYNAMIC DESIGN OPTIMIZATION (MRA와 POD를 적용한 공력특성 최적설계)

  • Koo, B.C.;Han, J.H.;Jo, T.H.;Park, K.H.;Lee, D.H.
    • Journal of computational fluids engineering
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    • v.20 no.2
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    • pp.7-15
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    • 2015
  • This paper attempts to evaluate the accuracy and efficiency of a design optimization procedure by combining wavelets-based multi resolution analysis method and proper orthogonal decomposition (POD) technique. Aerodynamic design procedure calls for high fidelity computational fluid dynamic (CFD) simulations and the consideration of large number of flow conditions and design constraints. Thus, even with significant computing power advancement, current level of integrated design process requires substantial computing time and resources. POD reduces the degree of freedom of full system by conducting singular value decomposition for various field simulations. In this research, POD combined Design Optimization model is proposed and its efficiency and accuracy are to be evaluated. For additional efficiency improvement of the procedure, multi resolution analysis method is also being employed during snapshot constructions (POD training period). The proposed design procedure was applied to the optimization of wing aerodynamic performance. Throughout the research, it was confirmed that the POD/MRA design procedure could significantly reduce the total design turnaround time and also capture all detailed complex flow features as in full order analysis.

A Study on RFID Based Biz-Model for QoS Guarantee for Container Terminals (RFID를 활용한 컨테이너터미널의 QoS 보장을 위한 비즈니스 모델 연구)

  • Park Doo-Jin;Park Jin-Hee;Kim Hyun;Nam Ki-Chan
    • Journal of Navigation and Port Research
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    • v.30 no.3
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    • pp.211-217
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    • 2006
  • In recent years, the pileup of world ports is deepening as time goes by due to China effect and continuous increase of world trade volume. The shipping companies try to reduce their shipping cost by using mega vessels in the ports. Shipping companies consider most of the ships turnaround time as a critical factor when selecting a calling port for reducing cost. This paper will suggest how we can guarantee terminal QoS like ship waiting time ratio and ship residing time applying RFID(Radio Frequence IDentification) technology, raising up rapidly as a fundamental solution of new growing industry to port information system. Also, lead time of whole port logistics can be decreased for reduction of loading & discharging time and result from productivity improvement of Twin-lift G/C(Gantry Crane} as applying RFID technology to terminal operation. The purpose of this paper suggests that the new business model of U-Port which port QoS can be guaranteed using RFID based RTLS technology.

Enhancement of Real-Time Transmission Performance of PGA data (PGA 데이터의 실시간 전송능력 향상)

  • Lim, In-Seub;Choi, In-Young;Jung, Soon-Key
    • Journal of the Korea Society of Computer and Information
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    • v.14 no.2
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    • pp.37-44
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    • 2009
  • In this paper, we propose an efficient method which improves the performance of transmission of PGA which is essential data for real-time earthquake monitoring system. Currently, above 120 earthquake stations were installed nationwide and additional installation is expected because the social interesting of earthquake hazard is rising. Real-time earthquake monitoring system checks earthquake occurrence by using PGA were calculated from acceleration data of each seismic station. An efficient method of PGA data transmission is key factor of real-time monitoring. The key idea of proposed method is to deal with each seismic station using an unique ID, to assign one bit to indicate whether a packet include a station's data or not. Proposed method can contain more station data and decrease the data loss compared to current method. To verify proposed method, we investigate the turnaround time and ratio of data loss using above 91000 packets. As results of experiment. the proposed method is proven that the method need more time about 50% but reduce the data loss about 87% as compared to previous method.

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Clinical Utility of a Fully Automated Microsatellite Instability Test with Minimal Hands-on Time

  • Lee, Miseon;Chun, Sung-Min;Sung, Chang Ohk;Kim, Sun Y.;Kim, Tae W.;Jang, Se Jin;Kim, Jihun
    • Journal of Pathology and Translational Medicine
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    • v.53 no.6
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    • pp.386-392
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    • 2019
  • Background: Microsatellite instability (MSI) analysis is becoming increasingly important in many types of tumor including colorectal cancer (CRC). The commonly used MSI tests are either time-consuming or labor-intensive. A fully automated MSI test, the Idylla MSI assay, has recently been introduced. However, its diagnostic performance has not been extensively validated in clinical CRC samples. Methods: We evaluated 133 samples whose MSI status had been rigorously validated by standard polymerase chain reaction (PCR), clinical next-generation sequencing (NGS) cancer panel test, or both. We evaluated the diagnostic performance of the Idylla MSI assay in terms of sensitivity, specificity, and positive and negative predictive values, as well as various sample requirements, such as minimum tumor purity and the quality of paraffin blocks. Results: Compared with the gold standard results confirmed through both PCR MSI test and NGS, the Idylla MSI assay showed 99.05% accuracy (104/105), 100% sensitivity (11/11), 98.94% specificity (93/94), 91.67% positive predictive value (11/12), and 100% negative predictive value (93/93). In addition, the Idylla MSI assay did not require macro-dissection in most samples and reliably detected MSI-high in samples with approximately 10% tumor purity. The total turnaround time was about 150 minutes and the hands-on time was less than 2 minutes. Conclusions: The Idylla MSI assay shows good diagnostic performance that is sufficient for its implementation in the clinic to determine the MSI status of at least the CRC samples. In addition, the fully automated procedure requires only a few slices of formalin-fixed paraffin-embedded tissue and might greatly save time and labor.

Effect of Steam Curing on Concrete Piles with Silica Fume

  • Yazdani, N.;F. Asce, M. Filsaime;Manzur, T.
    • International Journal of Concrete Structures and Materials
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    • v.4 no.1
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    • pp.9-15
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    • 2010
  • Silica fume is a common addition to high performance concrete mix designs. The use of silica fume in concrete leads to increased water demand. For this reason, Florida Department of Transportation (FDOT) allows only a 72-hour continuous moist cure process for concrete containing silica fume. Accelerated curing has been shown to be effective in producing high-performance characteristics at early ages in silica-fume concrete. However, the heat greatly increases the moisture loss from exposed surfaces, which may cause shrinkage problems. An experimental study was undertaken to determine the feasibility of steam curing of FDOT concrete with silica fume in order to reduce precast turnaround time. Various steam curing durations were utilized with full-scale precast prestressed pile specimens. The concrete compressive strength and shrinkage were determined for various durations of steam curing. Results indicate that steam cured silica fume concrete met all FDOT requirements for the 12, 18 and 24 hours of curing periods. No shrinkage cracking was observed in any samples up to one year age. It was recommended that FDOT allow the 12 hour steam curing for concrete with silica fume.

A Study on Spot Color Proofing using ICC-based Color Management System (ICC 기반의 컬러 매니지먼트 시스템을 사용한 별색 교정에 관한 연구)

  • Jung, Chung-Suk;Kang, Sang-Hoon
    • Journal of the Korean Printing Society
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    • v.25 no.1
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    • pp.81-94
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    • 2007
  • Recently, the trend in the printing industry includes shorter run lengths and with fast turnaround times. As new markets have made it possible to produce small quantities of high-quality color products at affordable price, the general commercial printing meets the customer's diverse demand by using spot color besides process four colors. Especially, by using spot color for printing the enterprise's logo or specific color, we can see the effect of printing is getting better. With the combination of the right software, ink, media, and device can be treated as a digital proofer for spot color printing, providing significant time and cost savings compared to conventional procedures. The objective of this study is to investigate the quality of spot color proofs printed by ink-jet and dye sublimation proofer using ICC-based color management system. An Epson Stylus Color 3000 ink-jet proofer combined with Best Color Proof XXL RIP was tested for glossy and matte paper. 3M Rainbow dye sublimation proofer was examined using 3M Rainbow controller ver. 4.1 RIP on the manufacturer recommended proofing paper. ICC profiles were generated for each device using ECI 2002 visual target and evaluated for the accuracy of process 4 color reproduction. The test charts consisting of Pantone color 1140 was selected to test the quality of spot color reproduction.

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