• 임상간호연구
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• 제15권3호
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• pp.117-128
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• 2009

Purpose: This study was conducted to evaluate the effects of different methods of information delivery(information provided by nurses vs. information provided by video) on environmental stress and the satisfaction of nursing needs in families of intensive care unit patients. Methods: A nonequivalent pretest-posttest control group design was used in this study. The data were collected from March 24 to May 7, 2009. The subjects, 52 family members of ICU patients (26 for the control group, 26 for the experimental group), were selected from a hospital located in Gyeonggido. Information was given by video to the experimental group whereas the information was directly given by nurses to the control group. Results: Environmental stress and satisfaction of nursing needs were not statistically different between the two groups. Conclusion: The findings of the study suggest that the information given by video may be compatible with that given by nurses. Therefore, nurses need to be flexible in using these different methods to maximize the benefits of direct and indirect information delivery method for families in ICU setting.

• International Journal of Advanced Culture Technology
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• 제10권2호
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• pp.194-200
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• 2022

Traditionally, postal services that produce and deliver paper-based notices have been the mainstream. The reason is that it has the function of distribution and proof of delivery in the postal delivery system as well as the advantage of information delivery through postal delivery. After all, for the purpose of distribution and proof of delivery, many organizations use paper-based postal notices. However, in recent years, it has been in the spotlight to produce a paper-based postal notice as an electronic notice and deliver information to a mobile device through the Internet. In this paper, we propose a safe interworking method for user identification information required for private institutions to transmit mobile electronic notices. In order for a private institution to accurately deliver an electronic notice to a mobile service subscriber, a means to confirm whether the private institution and the mobile device subscriber are the same person is required. In the mobile electronic notification service, the connecting information provided by the personal identity proofing agency is used as a means of user identification. Connecting information is called a resident registration number on the Internet and is one-way hash information that can only be created by the personal identity proofing agency designated by the government. In order to transmit a mobile electronic notice, it is necessary to share connecting information for the same user identification between the institution that requests the sending of the electronic notice and the institution that processes the sending of the electronic notice. Connecting information is personal information that can uniquely identify a user, and if it is disclosed, damage such as personal information infringement may occur. As such, it is necessary to prevent problems that may arise from misuse and abuse of connecting information as well as increase in the benefits of sending the mobile electronic notice. In this paper, a safe and effective mobile electronic notification service can be performed by suggesting a method for safe interworking of information related to the mobile electronic notification service.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제6권12호
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• pp.3257-3274
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• 2012

Broadcast routing has become an important research field for vehicular ad-hoc networks (VANETs) recently. However, the packet delivery rate is generally low in existing VANET broadcast routing protocols. Therefore, the design of an appropriate broadcast protocol based on the features of VANET has become a crucial part of the development of VANET. This paper analyzes the disadvantage of existing broadcast routing protocols in VANETs, and proposes an improved algorithm (namely ODAM-C) based on the ODAM (Optimized Dissemination of Alarm Messages) protocol. The ODAM-C algorithm improves the packet delivery rate by two mechanisms based on the forwarding features of ODAM. The first distance-based mechanism reduces the possibility of packet loss by considering the angles between source nodes, forwarding nodes and receiving nodes. The second mechanism increases the redundancy of forwarding nodes to guarantee the packet success delivery ratio. We show by analysis and simulations that the proposed algorithm can improve packet delivery rate for vehicular networks compared against two widely-used existing protocols.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권4호
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• pp.1527-1552
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• 2018

The rapidly-evolving demand of applications using wireless sensor networks in several areas such as building and industrial automation or smart cities, among other, makes it necessary to determine and provide QoS support mechanisms which can satisfy the requirements of applications. In this paper we propose a mechanism that establishes different QoS levels, based on Publish/Subscribe model for wireless networks to meet application requirements, to provide reliable delivery of packet and timeliness. The first level delivers packets in a best effort way. The second one intends to provide reliable packet delivery with a novel approach for Retransmission Timeout (RTO) calculation, which adjusts the RTO depending on the subscriber Packet Delivery Ratio (PDR). The third one provides the same reliable packet delivery as the second one, but in addition, it provides data aggregation trying to be efficient in terms of energy consumption and the use of network bandwidth. The last one provides timeliness in the packet delivery. We evaluate each QoS Level with several performance metrics such as PDR, Message Delivery Ratio, Duplicated and Retransmitted Packet Ratio and Packet Timeliness Ratio to demonstrate that our proposal provides significant improvements based on the increase of the PDR obtained.

• 한국산업정보학회논문지
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• 제12권4호
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• pp.89-96
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• 2007

온라인 시장의 증가로 택배의 물량이 나날이 늘어나고 있다. 이러한 환경은 수많은 택배회사들의 출현을 가져와서 치열한 고객유치 경쟁을 유발하고 있다. 그러므로 본 연구에서는 개미 알고리즘을 이용하여 보다 체계적으로 최단 택배배송경로를 찾아 주는 시스템의 개발에 그 목표를 두고 있다. 개발된 시스템은 숙련된 택배기사는 물론 마을 위치에 익숙지 않은 초보 택배기사에게도 배송경로탐색 및 배송시간에 큰 도움을 줄 것이며, 고객은 택배경로를 사전에 알 수 있어서 택배에 대한 신뢰성과 만족도를 높일 수 있을 것이다.

• 한국컴퓨터정보학회논문지
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• 제26권3호
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• pp.111-117
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• 2021

그래프에서의 배달문제는 m개의 정점으로 구성된 그래프에서 n개의 서로 다른 속도를 갖는 로봇 에이전트들을 이용하여 배달물을 그래프의 한 노드에서 다른 노드로 배달하는 최소 배달순서를 구하는 문제이다. 본 논문에서는 그래프에서의 배달문제에 대하여 최적해를 계산하는 O(㎥n)과 O(㎥)시간복잡도를 갖는 두 개의 알고리즘을 제안한다. 알고리즘은 그래프의 모든 쌍에 대한 최단경로를 구하는 전처리를 한 후, 최소배달시간이 작은 정점의 순으로 최단배달경로를 구하는 방법으로 개발하였다. 이 문제에서 그래프가 문제를 해결하고자 하는 지형을 반영하고 있다고 하면, 다양한 로봇 에이전트의 배치에 대하여 전처리를 1회만 실행되면 되므로 O(㎥) 알고리즘은 실제로 O(㎡n)의 시간복잡도를 갖는다고 할 수 있다.

• International Journal of Internet, Broadcasting and Communication
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• 제16권1호
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• pp.215-225
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• 2024

This study investigated the effect of the delivery service quality of Mongolian online shopping on the customer value, customer trust, and relationship persistence intention of Mongolian consumers. Through this, the purpose of this study is to understand the priorities of the quality conditions of delivery services (accuracy, economy, information, safety, tangibility, etc.) that Mongolian consumers value. The empirical analysis results of this study are as follows. First, the effect of delivery service quality on the intention to continue the relationship showed partially significant results. In other words, economics, information, and safety, excluding accuracy and tangibility, influenced the intention to continue the relationship. Second, the effect of delivery service quality on customer value was partially significant. In other words, accuracy, economy, safety, and tangibility, excluding informativity, influenced customer value. Third, the effect of delivery service quality on customer reliability was partially significant. In other words, economics, safety, and tangibility, excluding accuracy and informativity, influenced customer reliability. Fourth, the hypothesis of customer value on customer reliability was adopted, followed by the hypothesis of customer value on relationship continuity intention. Finally, the hypothesis of customer reliability on relationship continuity intention was adopted.

• 한국도서관정보학회지
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• 제32권1호
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• pp.285-307
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• 2001

With frequent use of the internet these days, academic libraries are offering the "Document Delivery Service" through the Internet in our country. The current "Document Delivery Service" utilized over the Internet was researched according to the method used by each library to connect to the internet. and this research, based on each library's current service conditions, service data types, document format of service data, whether the libraries used OPAC for document service or not, and user types. As a result of the research, it was discovered that most of the "Document Delivery Service" is served by website, mainly PDF format, use another interface differs from OPAC, and the personal users in our academic libraries.ers in our academic libraries.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2002년도 가을 학술발표논문집 Vol.29 No.2 (3)
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• pp.76-78
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• 2002

Multicasting over mobile IP network becomes more important with the increasing needs of supporting multimedia services in mobile network. The IETF has suggested two approaches which are remote subscription and bidirectional tunneling for supporting mobility management in multicasting over mobile IP. But these protocols have problems - the frequent reconstruction of multicast delivery tree, packet less during handoff, convergence problem, and so on. In this paper, we propose to use preconfiguration of multicast delivery tree when mobile host enters the foreign network. It will decrease the frequency of multicast delivery tree reconstruction, and reduce the packet loss during handoff, Also the multicast delivery tree maintained by Keep Alive messages makes the signaling overload of networks diminished.

• 정보관리학회지
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• 제32권3호
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• pp.413-432
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• 2015

본 연구는 한국복제전송저작권협회와 체결한 협정서를 기반으로 운영되고 있는 KERIS와 KISTI의 원문복사서비스 운영상의 문제점을 저작권을 중심으로 분석하였다. 분석 결과, 협정서 적용시 원문복사서비스가 가능한 대상기관 및 자료유형의 제한, 현행 전자배송서비스가 도서관 사서 간에만 이루어지는 한계, 개인 신청자 대상 비상호대차형 원문복사서비스의 제한적 가능의 문제점이 파악되었다. 이러한 문제점을 해결하기 위하여 본 연구는 저작권법에 상호대차형 원문복사서비스에 대한 근거 규정 도입과 권위 있는 표준 가이드라인의 개발, 최종 이용자가 원문파일을 출력할 수 있도록 하되 저작권 침해방지를 위한 기술적 조치를 도서관이 의무적으로 설치할 것, 개인 신청자를 위한 저작권료 지불 원문복사서비스 모델 도입을 제안하였다.