• Title, Summary, Keyword: 인지적 협소화

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Escape Theory Approach to Consumers' Belief Biases (소비자의 신념편향에 대한 도피이론적 접근)

  • Han, Woong-Hee
    • The Journal of the Korea Contents Association
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    • v.14 no.11
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    • pp.411-421
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    • 2014
  • This study investigated the effect of cognitive narrowing on the consumers' belief biases in the light of the escape theory. Current study researched the relationship between the cognitive narrowing and the consumers' belief biases. The result of this study is as below. The degree of the consumers' belief biases is higher when the degree of the cognitive narrowing is higher than lower. On the basis of this result, theoretical and practical implications were suggested and the limitations and future research were discussed.

An Efficient Routing Algorithm Considering Packet Collisions in Cognitive Radio Ad-hoc Network (CR Ad-hoc Network에서 패킷 충돌을 고려한 효율적인 경로탐색 알고리즘)

  • Kim, Jin-Su;Choi, Jun-Ho;Shin, Myeong-Jin;Lee, Ji-Seon;Yoo, Sang-Jo
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.38B no.9
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    • pp.751-764
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    • 2013
  • In cognitive radio ad-hoc networks, common control channel overload and packet collisions are occured due to indiscriminate broadcasting of control packets. So that the path reliability is reduced and control channel is easily saturated. In this paper, we propose a new routing algorithm considering the probability of appearance of primary user and channel status of neighbor nodes. When the source node needs to transmit a data packet to the destination, it performs route discovery process by exchanging control messages using a control channel in ADOV CR Ad-hoc networks. If any intermediate node doesn't have common data channel with previous node to transmit data, it doesn't rebroadcast control packet. And if it has common data channels with previous node, each node determines channel contribution factor with the number of common channels. Based on the channel contribution factor, each node performs different back-off broadcasting. In addition, each node controls control packet flooding by applying to proposed advanced mode using such as number of available channels and channel stability. With the proposed method, the number of control packets to find the data transmission path and the probability of collision among control packets can be decreased. While the path reliability can be increased. Through simulation, we show that our proposed algorithm reduces packet collisions in comparison with the traditional algorithm.

A Context-Aware System for Reliable RFID-based Logistics Management (RFID 기반 물류관리의 신뢰성 향상을 위한 상황인지 시스템 개발)

  • Jin, Hee-Ju;Kim, Hoontae;Lee, Yong-Han
    • The Journal of Society for e-Business Studies
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    • v.18 no.2
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    • pp.223-240
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    • 2013
  • RFID(Radio Frequency Identification) is use of an RFID tag applied to object for the purpose of identification and tracking using radio waves. Recently, it is being actively researched and introduced in logistics and manufacturing. RFID portals in supply chains are meant to identify all the tags within a given interrogation zone. Hence the hardware and software mechanisms for RFID tag identification mostly focus on successful read of multiple tags simultaneously. Such mechanisms, however, are inefficient for determining moving direction of tags, sequence of consecutive tags, and validity of the tag reads from the viewpoint of workflow. These types of problems usually cause many difficulties in RFID portal implementation in manufacturing environment, there by having RFID-system developers waste a considerable amount of time. In this research, we designated an RFID portal system with SDO(Sequence, Direction, and Object-flow)-perception capability by using fundamental data supplied by ordinary RFID readers. Using our work, RFID system developers can save a great amount of time building RFID data-capturing applications in manufacturing environment.