• Title/Summary/Keyword: call demand

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A Study of GIS Education in Secondary School - A Case study of High School (중등 학교에서 GIS 교육에 관한 연구 -고등학교를 중심으로)

  • 오충원;성춘자
    • Spatial Information Research
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    • v.11 no.1
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    • pp.89-100
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    • 2003
  • The purpose of this study is to search GIS education in High School in Korea. Firstly, Expanded Content of GIS in the 7th National Curriculum call upon increased demand of GIS education. Secondly, It is urgent to development of GIS Education Program, There is insufficient practical instruction of GIS in High School because of ill-equipped environment. For that reason we proposed GIS program. Thirdly, It is necessary to integrate between 'Instruction about GIS' and 'GIS Assisted Instruction' in School. Finally, It is necessary to systematically prepare and study of GIS Education for the future National Curriculum.

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A Study on the prospect of Sea & Air multi-transport in the perspective of international logistics environment

  • Chung, Tae-Won;Han, Jong-Khil
    • Journal of Navigation and Port Research
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    • v.34 no.7
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    • pp.587-594
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    • 2010
  • The positive and negative opinion to cargo demand of Incheon's SAMT in the near future remains cloudy. Considering port and shipping environmental changes and the logistics situation of China which explains the lack of facilities in Chinese airports, the creating of SAMT cargoes of the Incheon region could catches a favorable opportunity to be a logistics hub in the North-East Asia. On the other hand, as open-sky policy and direct-call service has been carried out between China and N.A.(North America), Incheon could cause a loss of competitiveness in SAMT because the enhancement in the aspect of the connectivity of Chinese airlines and shipping lines makes customer sent to last destination their cargoes whenever they want. In the same context, this paper analyses on conditions of domestic and international SAMT and proposes in this uncertainty future forecasting of SAMT of Incheon by scenario planning according to changes in integrated SAMT, measuring the likelihood of final scenario. This study shows the Sea & Air multi-transport volume will have either slight increase or decrease from the current condition. Consequently, RFS expansion and system & service improvement through strong ties with major cities in China will be required in a short run aspect. Nonetheless, we also need to take domestic & international transportation environment into account in the long run.

A Send-ahead Policy for a Semiconductor Wafer Fabrication Process

  • Moon, Ilkyeong
    • Journal of the Korean Operations Research and Management Science Society
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    • v.18 no.1
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    • pp.119-126
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    • 1993
  • We study a manufacturing process that is quite common in semiconductor wafer fabrication of semiconductor chip production. A machine is used to process a job consisting of J wafers. Each job requires a setup, and the i$_{th}$ setup for a job is sucessful with probability P$_{i}$. The setup is prone to failure, which results in the loss of expensive wafers. Therefore, a tiral run is first conducted on a small batch. If the set up is successful, the test is passed and the balance of the job can be processed. If the setup is unsuccessful, the exposed wafers are lost to scrap and the mask is realigned. The process then repeats on the balance of the job. We call this as send-ahead policy and consider general policies in which the number of wafers that are sent shead depend on the cost of the raw wafer, the sequence of success probabilities, and the balance of the job. We model this process and determine the expected number of good wafers per job,the expected time to process a job, and the long run average throughput. An algorithm to minimize the cost per good wafer subject to a demand constraint is provided.d.d.

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A Study on Urban Inhabitants' Consciousness for Urban-Countryside Complex Type Villages Development - Focused on Gwang-ju Inhabitants (도시근교 도농복합형마을 개발에 관한 도시민의 의식조사 연구 - 광주광역시 주민을 중심으로)

  • Han, Seok-Jong
    • Journal of the Korean Institute of Rural Architecture
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    • v.14 no.1
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    • pp.67-74
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    • 2012
  • As the rural economy is worsening day by day due to rapidly declined population and increase of aging generation, the emptiness in the rural areas are becoming increasingly intensifying. In particular, urban runoff of young adults and middle-aged people and the decrease in birth rate have shrunk the rural population reaching to raise concerns on the stage of emptiness. On the other hand, people in the urban areas with rapid industrialization and overcrowding call for the variety of housing needs moving away from monolithic housing types. In order to solve problems of rural communities such as emptied out rural society as well as the problems of urban communities in overcrowdings, environment, and housing, it is required to develop an urban-countryside village complex pursuing advantages of the rural environment and convenience of urban living. Of this time, there needs a change in rural development policies which can make the urban residents migrate and settle in the rural areas as they are naturally embracing the rural life according to the social background and demand.

4P Model for Strategic Research Planning: Focusing on the Cases of Korea Research Institute of Chemical Technology

  • Choi, Kyungsun;Choe, Hochull;Ko, Youngjoo
    • Asian Journal of Innovation and Policy
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    • v.7 no.2
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    • pp.287-309
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    • 2018
  • The demand for efficient utilization of input resources and productive outcomes is increasing as the government's R&D investments in Government-funded research institutes (GRIs) expand. These changes call for improving research-planning activities, which are defined as a set of activities wherein objectives are established, strategies for acquisition and expenditures of research resources are devised, and utilizations of research outcomes are addressed. This study introduces the integrated 4P analysis model that identifies the relationships among patents, papers, products, and projects. It looks into 4P analysis structure and its efficiency as a research planning means through case studies of the Korea Research Institute of Chemical Technology. This study introduces 4P analysis applied to KRICT, which can be utilized for outcome-oriented research planning of GRIs. At the same time, it investigates into the benefits and implications of 4P analysis. It proffers policy suggestions on such aspects as how research planning of GRIs should go through changes in a strategic and systematic way.

Novel Home Network QoS Mechanism for the High-Definition IPTV Service based on Multicast Traffic (멀티캐스트기반 고화질 IPTV 서비스를 위한 홈네트워크 품질보장 기법)

  • Park, Minho;Jeong, Yeonjoon;Paik, Euihyoun;Park, Kwangroh
    • IEMEK Journal of Embedded Systems and Applications
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    • v.2 no.1
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    • pp.17-23
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    • 2007
  • The home network has been revitalized due to the emergence of the high-speed broadband network and explosive increases of the home network services. Especially multicast based high-definition (HD) IPTV service is on high demand from both Internet service provider (ISP) and users. In order to provide high quality HD IPTV service without packet loss and delay, the ISP utilizes various network QoS mechanisms. Due to the misleading fact, that the home gateway is considered as an end terminal in terms of the ISP's viewpoint, the ISPs can not guarantee the end-to-end QoS within the scope of the current home network architecture. Therefore, an independent QoS guaranteed mechanism should be considered within the home network domain. As the home gateway manages both private home and public access network within the home network, we propose and implement a novel QoS mechanism for the multicast based HD IPTV service over the home gateway. In order to provide QoS guaranteed HD IPTV service, the proposed mechanism classifies the packets, manages home network bandwidth resources, and executes call admission control using the channel join message. Also, we utilize layer 2 multicast packet forwarding scheme to improve the overall performance of the home network services. Through the experiments of implementing the multicast based HD IPTV services, we will verify the efficiency of the proposed mechanism.

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A Study on the Introduction of Superconducting Cable in Korean Power System (초전도 케이블 계통 적용을 위한 계통 구성 방안 및 적용 대상 고찰)

  • 김종율;윤재영;이승렬
    • Progress in Superconductivity and Cryogenics
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    • v.5 no.2
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    • pp.8-15
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    • 2003
  • Nowadays, As power demand increases gradually, the call for underground transmission system increases. But it is very difficult and high in cost to construct new ducts and/or tunnels for power cables in metropolitan areas. HTS cable has the several useful characteristics such as increased power density, stronger magnetic fields and/or reduced losses. Therefore HTS cable can allow more power to be moved in existing ducts, which means very large economical and environmental benefits. In this paper, we investigate the status of korean power system and underground transmission system. Based on this, the feasibility study on applying HTS cable to korean power system is carried out and then we propose the new power system configuration of metropolitan area with HTS cable. Finally, we can get a conclusion that applying HTS cable to 154kV underground transmission line in metropolitan area such as seoul is very available. In addition, detail applicable cases are investigated; a)replace old conventional cable with HTS cable; b) apply HTS cable to constructing new underground transmission line; c)use HTS cable to resolve overload problem in conventional power system configuration.

A Study on The Application of Experimental Data of Ergonomics to Computer Monitor Front Design (컴퓨터 모니터 디자인 개발에서 인간공학 응용 연구)

  • Sin, Myeong-Cheol
    • Journal of the Ergonomics Society of Korea
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    • v.17 no.3
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    • pp.103-115
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    • 1998
  • Although applying experimental data of ergonomics to a industrial design seems to be a difficult task, making every effort to the application of ergonomics to the industrial design process is still attempted. Sometimes, it is easy to use experimental data, yet, it is very hard to take that data and implement it into the design process. The essence of industrial design depends on human sensitivity, thus we can call the sense of design the software and the experimental data of ergonomics the hardware. The harmony of this hard & software is very important for the process and development of design. New products always demand new forms. Accordingly, it is easy for designers to neglect applying experiments and ergonomic data to products for public users. However, the study of ergonomics data continuously helps to be applied to more products year after year. This paper explores, how to improve the design of the tilting angle related to the shape of knobs on a front panel of a computer monitor. The results of experiments show that a tilted angle is more efficient than that of straight-type when placed on the front panel of a computer monitor with a power button.

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Design and Implementation of Apparel Product Support System based on SOA Environment (SOA 환경 기반의 의류 생산지원 시스템 설계 및 구현)

  • Han, Jong-Jin;Choi, Dong-Oun;Song, Hang-Suk
    • The Journal of the Korea Contents Association
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    • v.8 no.4
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    • pp.1-9
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    • 2008
  • SOA sorts function of old applications by function unit that have business meaning, and through standard call interface, do orchestration by component unit of service. System that developed in this paper predicts production point of time when order with frugality of production raw material. And reduce original register resources purchase expense and production costs in proper stock and increase company's competitive power. Also, design and implementation production management system for many species small quantity production of SOA base that reflect this analyzing correctly company's manufacturing process and original register resources supply and demand present condition.

Case studies : Security issues of IT products in terms of supply chain (사례 위주로 본 공급자망을 중심으로 한 IT제품 보안 위험)

  • Choi, Woongchul
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.12 no.4
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    • pp.89-96
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    • 2016
  • Before an IT product is used, there is a sequence of the process such as the components supply-demand of the product, their assembly and production, their logistics and delivery, and then finally, the product can be used by a user. During this sequence of the process, there can be many security exposures and risks. In this paper, we show, by examining security cases of various IT products, that there are many security exposures in the process of IT products from their production to their delivery to end users and in their use, and also show how critical the security exposures are. Even though there are various security theories, technologies and security controls, there is still weak link from the production of an IT product to its use, and this weak link can lead to security vulnerabilities and risks. This paper tries to call attention to the importance of the execution of the security control and the control components. We examine the practical cases to find out how the security control is paralyzed, and to show how it is compromised by asymmetric security resources. Lastly, from the cases, we examine and review the possible domestic security issues and their countermeasures.