• Title, Summary, Keyword: Turnaround time

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Architectural Design of Terminal Operating System for a Container Terminal Based on a New Concept

  • Singgih, Ivan Kristianto;Jin, Xuefeng;Hong, Soondo;Kim, Kap Hwan
    • Industrial Engineering and Management Systems
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    • v.15 no.3
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    • pp.278-288
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    • 2016
  • Automation ensures accurate and well-organized container transportation in container terminals. This paper addresses operational issues such as equipment scheduling and the coordination between various pieces of equipment in a rail-based automated container terminal. Containers are relayed using multiple types of equipment from road trucks to a vessel and vice versa. Therefore, handshaking is required during a container transfer between different pieces of equipment. Synchronization between the schedules of all the equipment is important to reduce equipment waiting times and the time required for transporting containers, which results in a short turnaround time for a vessel. This paper proposes an integrated control system with the objective of synchronizing the operations of different types of equipment, provides a list of decisions to be made by the control module of each type of equipment, and shows all the required information transfers between control modules. A scheme for the integrated scheduling of multiple types of equipment is proposed. The decisions made by each control module in a real-time fashion are listed with detailed explanations, and the information transfer between managers in a real-time situation at the proposed terminal is described.

Quantitative Analysis for the Expected Effect of Tractor Appointment System (컨테이너 반출예약제 기대효과의 계량적분석)

  • Kim, Woo-Sun;Choi, Yong-Seok;Ha, Tae-Young
    • Journal of Navigation and Port Research
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    • v.27 no.4
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    • pp.403-407
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    • 2003
  • A basic concept of TAS(Tractor Appointment System), which not only enhances the terminal productivity, but also yields higher efficiency of domestic CT(Container Terminal), is developed in this paper for CT to more competitive and serviceable. To analyze the effects of TAS when applied to the existing four-tier CT, a quantitative analysis is performed. The results showed that the number of rehandling time of CT has been significantly decreased, the efficiency of CT increased, and the flow time of trucks in CT reduced in a great deal

Performance Analysis of Disk Array System with Write Dedicated Buffer (기록전용버퍼를 내장한 디스크배열 시스템의 성능분석)

  • Yoon, Je-Hyun;Jeon, Chang-Ho
    • Journal of the Korean Institute of Telematics and Electronics B
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    • v.31B no.11
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    • pp.11-19
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    • 1994
  • Turnaround time of a job performing frequent disk I/O operations is greatly affected by I/O bottleneck which incurs due to the large gap in the speeds of I/O devices and the CPU. This paper proposes to employ a Write Dedicated Buffer(WDB) in disk arrays to improve the response time for read requests and analyzes the scheduling policies and the efficiency of the WDB. Through a series of simulations we show that, among the three policies examined, the partial stripe join(PSJ) policy is the most effective in terms of response time for both read and write requests and that, especially when using a WDB on declustered arrays, improvement of response time for read requests becomes greater as the request rate increases.

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Improvement of Histopathological Sample Preparation by Employing Microwave Heating Method on Frozen Section Specimens

  • Ahn, Seung-Ju
    • Biomedical Science Letters
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    • v.13 no.4
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    • pp.361-368
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    • 2007
  • Biological samples can be fixed either by chemical method by using chemical solution or physical methods by using heat treatment. The problem in traditional heat fixation is unsatisfactory quality due to uneven heat conduction in specimen and loss of inner cell contents. Chemical fixation method also bears several intrinsic problems like the limit in specimen size, time consumption in fixative impregnation, and loss of low molecular weight cell components. These factors deteriorate the quality of fixed specimen, thus limit the magnification and contrast of tissue pictures. Microwave heat has been reported to be a good alternative to current chemical methods to overcome these problem. In this study, we tried to introduce the microwave energy method to routine fixation work in hospital. We replaced chemical fixative with saline to provide moderate reaction condition, and used frozen section to reduce time for sample preparation. Temperature was measured at each experiment. The fixation of rat kidney tissue with 2.45 GHz electromagnetic wave and saline showed similar result to the control group fixed with traditional chemical method. Human tumor tissue fixed with 2.45 GHz electromagnetic in frozen section was improved in terms of histochemistry of PAS and immunohistochemistry of tumor marker like cytokeratin. Total turnaround time was reduced from $24\sim38$ h to to $2\sim4$ h. In conclusion, the quality of samples prepared by microwave heating method was at least as good as that of traditional method. If the condition for the fixation of different specimens is standardized, this new method could be applied to routine work in hospital, and could save working time as well.

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Animation Support for Networked Virtual Environments

  • Ko, Hyeongseok
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • pp.13-17
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    • 1996
  • This paper presents animation techniques and issues involved in virtual environments where the participants interact with each other through a network. The state of the participant should be recognized at each local site, and broadcast to the other sites. Because information exchange is minimal, animation techniques are applied to convert the incoming low DOF parameters into high DOF joint angles that completely determine the configuration of the agents at each frame. As a case study, a software system VRLOCO is introduced, which has been developed by the author over the last five years. From a simple stream of body center positions, VRLOCO generates realistic curved path human locomotion in real-time. Based on the heading direction and speed, the locomotion automatically switches among five different primitives: walking, running, lateral stepping, backward stepping, and turnaround. The techniques presented here proved robust and faithful: the algorithm is not sensitive to the noise in the data, and the resulting animation conforms well with the original data.

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An overview and analysis of commercial document delivery systems (국내외 상업적 문헌제공시스템의 현황파악과 비교분석)

  • 윤희윤
    • Journal of the Korean Society for information Management
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    • v.15 no.2
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    • pp.7-28
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    • 1998
  • The purpose of this study is to overview and analyze the commercial document delivery systems. to this end, the study first compared the current systems under three headings, that is, non-collection-based systems(Infotrieve, OCLC, UnCover, BIDS, Swets & Zeitlinger, Kyobobook), collection-based systems(EBSCO, ISI, UMI, BLDSC, CISTI, INIST, NCSI, JICST, KINITI), and specialized collection-based systems(Engineering Information Inc., IEEE/IEE, BIOSIS, CAS, NAL, RSC, TWI, ADONIS). Next, the study analyzeed the advantages and disadvantages of each system, based on the four performance criteria : scope of inventory/journal coverage, turnaround time, delivery ost and payment options, reliability and satisfaction rate.

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A Log Analysis System with REST Web Services for Desktop Grids and its Application to Resource Group-based Task Scheduling

  • Gil, Joon-Min;Kim, Mi-Hye
    • Journal of Information Processing Systems
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    • v.7 no.4
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    • pp.707-716
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    • 2011
  • It is important that desktop grids should be able to aggressively deal with the dynamic properties that arise from the volatility and heterogeneity of resources. Therefore, it is required that task scheduling be able to positively consider the execution behavior that is characterized by an individual resource. In this paper, we implement a log analysis system with REST web services, which can analyze the execution behavior by utilizing the actual log data of desktop grid systems. To verify the log analysis system, we conducted simulations and showed that the resource group-based task scheduling, based on the analysis of the execution behavior, offers a faster turnaround time than the existing one even if few resources are used.

The NQS Queue Design and Implement in NEC System for Efficient Practical Use (NEC 시스템의 효율적인 활용을 위한 작업관리 큐 설계 및 구현)

  • Lee, Young-Joo;Sung, Jin-Woo;Lee, Sang-Dong;Kim, Joong-Kwon
    • Proceedings of the Korea Information Processing Society Conference
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    • pp.1507-1510
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    • 2005
  • 시스템의 한정된 자원을 다수의 사용자들에게 효율적으로 분배하기 위해서 작업관리 시스템을 사용한다. 작업관리 시스템은 그 종류가 여러 가지 있는데, 시스템의 종류나 작업의 특성에 따라서 적당한 작업관리 시스템을 사용한다. NEC 시스템에서는 작업관리 시스템으로 NQS를 사용하고 있으며, 이 작업관리 시스템을 어떻게 잘 설계하느냐에 따라 시스템 자원의 활용율이 달라지기 때문이다. 따라서 한정된 시스템의 자원을 다양한 사용자들의 작업 특징에 따라 적절히 자원을 배분 할 수 있도록 차등 큐를 설계하고 구현하였다, 그리고 작업관리 시스템 각각의 큐에서 처리된 작업의 turnaround time을 분석 하였다.

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Efficient Scheduling Algorithm for drone power charging

  • Tajrian, Mehedi;Kim, Jai-Hoon
    • Proceedings of the Korea Information Processing Society Conference
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    • pp.60-61
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    • 2019
  • Drones are opening new horizon as a major Internet-of-Things (IoT) player which is a network of objects. Drone needs to charge itself during providing services from the charging stations. If there are lots of drones and one charging station, then it is a critical situation to decide which drone should get charged first and make order of priorities for drones to get charged sequentially. In this paper, we propose an efficient scheduling algorithm for drone power charging (ESADPC), in which charging station would have a scheduler to decide which drone can get charged earlier among many other drones. Simulation results have showed that our algorithm reduces the deadline miss ration and turnaround time.

A Development of Integrated Operation System of Container Terminals in Ubiquitous Environment using RFID

  • Park, Doo-Jin;Yoo, Ju-Young;Nam, Ki-Chan
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • v.1
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    • pp.343-348
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    • 2006
  • Number of researches on efficient terminal operation system applying RFID(Radio Frequency Identification) are on progress. However, RFID has limitations on tracking and providing accurate positions of containers. In this paper, to enhance the performance of the integrated terminal operation system, an efficient loading management of yard is proposed by applying RFID-based RTLS(Real Time Locating System) that provides real-time accurate positions of containers. We found that a group-based sequence system is more efficient than the existing individual sequence number system in the container yard. In the group-based sequence system, the containers in the same group should have similar characteristics such as port of destination(POD), size, weight, etc. In order to run this system, we have proposed the parameters to the unspecified N bytes of RFID tag which are specified in ISO 18000-7. And, this paper proposed a development of integrated operation system of container terminal using RFID for reducing the ship turnaround time in ubiquitous port environment.

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