• 한국응급구조학회지
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• 제24권2호
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• pp.67-77
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• 2020

Purpose: The study aims to improve the quality of emergency medical services by surveying the user's satisfaction of 119 emergency medical services nationwide. Methods: From December 21 to December 27 each year from 2015 to 2017 a total of 5,889 people were surveyed by phone call in fire station. Results: The average degree of satisfaction with the emergency medical services was 4.17±0.70, with 85.1% respondents reporting being 'satisfied'. Factors like being a patient, injuries, residential area, and scene arrival time affected satisfaction. From 2015 to 2017, the satisfaction degree decreased every year, with factors affecting this results including "first aid guidance of phone call" and "rapidity of emergency medical services." The highest satisfaction factors were 'friendly acting of emergency medical services' and 'appropriate offer of emergency medical services', while the lowest satisfaction factors were 'first aid guidance of phone call' and 'adequacy of emergency medical team'. Conclusion: The quality of emergency medical services needs to be improved by managing the quality of phone call first aid guidance and the assignment of adequate emergency medical teams to increase user satisfaction.

• 디지털산업정보학회논문지
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• 제10권3호
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• pp.127-141
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• 2014

A Vehicle Tracking System consists of GPS tracking device which fits into the vehicle and captures the GPS location information at regular intervals to a central GIS server, and GIS tracking server providing three major responsibilities: receiving data from the GPS tracking unit, securely storing it, and serving this information on demand of the user. GPS based tracking systems supporting a multi-session processing among RMA, RM, and RCP can make a quick response to various services including other vehicle information between RSU and OBU on demand of the user. In this paper we design RSU lower layers and RCP applications in OBU for a multisession processing simulation and test message processing transactions among RMA-RM and RM-RCP. Furthermore, we implement the additional functions of handling access commands simultaneously on multiple service resources which are appropriate for the experimental testing conditions. In order to make a multi-session processing test, it reads 30 resource data,0002/0001 ~ 0002/0030, in total and then occurs 30 session data transmissions simultaneously. We insert a sequence number field into a special header of dummy data as a corresponding response to check that the messages are received correctly. Thus, we find that GIS service system with a multi-session processing is able to provide additional 30 services in a same speed of screen presentation loading while identifying the number of session processing of Web GIS service, the number of OBU service, and the speed of screen presentation loading by comparing a single session and a multi-session of GIS service system.

• 지역사회간호학회지
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• 제14권3호
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• pp.397-406
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• 2003

The purpose of this study is to provide the basic data in order to improve the quality of charged recuperation facilities which are specialized in the old. after finding out the satisfaction degree for the services which are provided in the current charged recuperation facilities specialized in the old and surveying the services which are demanded by users. As for the research method. the subjects were 88 family members of the users in the five charged recuperation facilities, which are specialized in the old and located in Seoul and Incheon. The survey research was executed from 27th July to 15th September, 2002. Then the collected data were analyzed by using the SPSS 10.0 for windows program. The research results are as follows. Firstly, in the satisfaction degree of the user's family about the daily service showed the highest satisfaction degree for the kind service of the staff to the users. In the satisfaction degree about the specialized service of the user's family, the satisfaction degree was high in bedsore prevention, periodical health care, proper medical treatment, family counsel, and adequate disease management. In the satisfaction degree about the facility and environmental service, the satisfaction degree about the surrounding environment of the facility or safety facility, and the comfort condition was high. In the satisfaction degree about the services related to the local society, it was high in the hospital and medical-related field. Secondly, in the demanded services, the demanding degree for worship, mental and spiritual nursing, hospice, funeral service, family meeting, and support for the special vehicle were not so high, but it was shown that they were generally demanded. Thirdly, it was shown that the provided services had an overall high satisfaction degree. In the service satisfaction degree according to the general characteristics of the user's family, it was recognized that there was a significant difference between the distinction of sex and local society related services. Also, there was a significant difference in the satisfaction degree between age and specialized service. Through the above research results, detailed rehabilitation programs such as linguistic treatment and working treatment should be more and more compensated in order to supplement the insufficient points of the services provided by the charged recuperation facility specialized in the old. Additionally, the correlation with the local society such as education and training for specialized human labor, close cooperation among the facilities, and positive participation in local society events are thought to be reinforced.

• 한국IT서비스학회지
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• 제13권1호
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• pp.87-101
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• 2014

This paper is a study on information Quality of Domestic Call Center Information System; recognized the importance of information quality and analyzed the impact on use and satisfaction of users following information quality which is a success element and ultimately the impact on user's performance by expanding information quality evaluating model by Jeong-Woo Lee et al.(2003) who reflected domestic special corporate culture based on information system success model by DeLone and McLean(2003). This is meaningful in providing theoretical foundation for efficient information quality supply and building quality management system at call center in future and provides hints to be considered in raising understanding of consultants on provided information and arranging ground that can utilize it in a timely manner.

• 산업경영시스템학회지
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• 제33권2호
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• pp.133-139
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• 2010

PC camera-based instant messenger have problems of video image break/delay and noise. The reason is caused by a composed problem that PC Camera is belong to the connected PC and operating in the PC. This research suggests an instant messenger that uses network camera connected to LAN instead of PC camera. Therefore, the instant messenger has a component that the camera is separated from PC. This research designs sequence diagram, video calls flow chart, and graphic user interface of the instant messenger. The instant messenger based on network camera provides high quality video calls service and makes it possible to call from a special remote site with real-time video image.

• 한국멀티미디어학회논문지
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• 제9권9호
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• pp.1222-1230
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• 2006

위치기반 서비스는 사용자의 지리적인 현재 위치를 기반으로 사용자에게 제공되는 서비스를 일컫는다. 위치기반 서비스는 고부가가치를 제공하기 때문에 기업, 산업, 그리고 개인 생활에까지 널리 적용되고 있다. 사용자의 위치 판단(측위)은 위치기반 서비스 시스템 구축에 반드시 필요한 요소 기술이다. GPS로 인하여 건물 외부에서의 측위는 성공적으로 실용되고 있으나, 옥내 측위는 많은 전략이 발표되었음에도 불구하고 일반적인 해법이 아직도 존재하지 않는다. 성공적인 옥내 측위 해법이 존재하지 않는 이유 중 하나는 현존하는 대부분의 측위 전략이 전적으로 측위에만 사용되는 특수 장치를 사용하기 때문이다. 본 논문에서는 부가적인 장비를 사용하지 않는 옥내 측위 전략을 소개한다. 또한, 제안하는 옥내 측위 전략과 GPS 기반의 옥외 측위 방법을 통합하여 옥내외 겸용 측위 시스템을 구축하고, 이 시스템의 실험 결과를 소개한다.

• 한국멀티미디어학회논문지
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• 제20권12호
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• pp.1913-1927
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• 2017

Encryption technology is to hide information in a cyberspace built using a computer and to prevent third parties from changing it. If a malicious user accesses unauthorized device or application services on the Internet of objects, it may be exposed to various security threats such as data leakage, denial of service, and privacy violation. One way to deal with these security threats is to encrypt and deliver the data generated by a user. Encrypting data must be referred to a technique of changing data using a complicated algorithm so that no one else knows the content except for those with special knowledge. As computers process computations that can be done at a very high speed, current cryptographic techniques are vulnerable to future computer performance improvements. We designed and implemented a new encryption program that combines ancient and modern cryptography so that the user never knows about data management, and transmission. The significance of this paper is that it is the safest method to combine various kinds of encryption methods to secure the weaknesses of the used cryptographic algorithms.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.362-367
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• 2005

Control network adopted in the national power-plant or manufactory are mostly vendor-dependent products, which have their own special specification, components and individual communication methods. These systems not only raise installation cost, but also bring many difficulties to maintenance and extension. To overcome these problems, this paper introduces a development and application case of a new "PC/Ethernet-based fieldbus" architecture and protocol to be used in mid-level fieldbus. The designed system has a basic idea of "3 Layers fieldbus over Standard-LAN" and implemented on PCs. PC gives user friendly environment. By using an open standard Ethernet in layer 1,2, the system has low cost, wide communication bandwidth and high compatibility. Layer 3 protocol designed for large realtime data communication makes user bypass TCP/IP layer and gives user direct access to the Ethernet. This new protocol eliminates potential collision of Ethernet, and transmits large periodic/non-periodic control data by using long-frame/wide-bandwidth of Ethernet effectively, and offers simple API-Services to the upper layer. Since the system have installed in H-power plant simulator and U-nuclear power plant simulator in Korea, it have been proved to be efficient and stable without any trouble in realtime communication service for full-scope plant simulator that has a lot of control elements.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권3호
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• pp.1313-1336
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• 2020

Cognitive radio (CR) is regarded as an effective approach to avoid the inefficient use of spectrum. However, CRNs have more special security problems compared with the traditional wireless communication systems due to its open and dynamic characteristics. Primary user emulation attack (PUEA) is a common method which can hinder secondary users (SUs) from accessing the spectrum by transmitting signals who has the similar characteristics of the primary users' (PUs) signals, and then the SUs' quality of service (QoS) cannot be guaranteed. To handle this issue, we first design a multiple-phase energy detection scheme based on the cooperation of multiple SUs to detect the PUEA more precisely. Second, a joint SUs scheduling and power allocation scheme is proposed to maximize the weighted effective capacity of multiple SUs with a constraint of the average interference to the PU. The simulation results show that the proposed method can effectively improve the effective capacity of the secondary users compared with the traditional overlay scheme which cannot be aware of the existence of PUEA. Also the good delay QoS guarantee for the secondary users is provided.

• Journal of Information Processing Systems
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• 제15권4호
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• pp.904-919
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• 2019

Many security systems rely solely on solutions based on Artificial Intelligence, which are weak in nature. These security solutions can be easily manipulated by malicious users who can gain unlawful access. Some security systems suggest using fingerprint-based solutions, but they can be easily deceived by copying fingerprints with clay. Image-based security is undoubtedly easy to manipulate, but it is also a solution that does not require any special training on the part of the user. In this paper, we propose a multi-factor security framework that operates in a three-step process to authenticate the user. The motivation of the research lies in utilizing commonly available and inexpensive devices such as onsite CCTV cameras and smartphone camera and providing fully secure user authentication. We have used technologies such as Argon2 for hashing image features and physically unclonable identification for secure device-server communication. We also discuss the methodological workflow of the proposed multi-factor authentication framework. In addition, we present the service scenario of the proposed model. Finally, we analyze qualitatively the proposed model and compare it with state-of-the-art methods to evaluate the usability of the model in real-world applications.