• Proceedings of the Korean Society of Computer Information Conference
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• 2023.07a
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• pp.673-674
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• 2023

도로교통의 안전 확보와 사고 예방을 목적으로 운전자나 보행자에게 필요한 정보를 제공하기 위해 경찰청에서 규격 또는 지침으로 제정하여 노변에 설치되는 교통안전시설 장치는 교통신호정보를 받기 위한 통신선과 함께 장치 구동을 위한 전원선을 개별로 시공해야 하기에 시공 비용의 절감과 함께 다종·다형의 장치에 대하여 통합적인 관제, 확장성, 유연성에 대응할 필요성이 제기되고 있다. 이에 본 논문에서는 이더넷 통신을 기반으로 전원 공급이 하나의 케이블로 가능한 이더넷 전원장치(PoE) 기술과 IoT 프로토콜인 MQTT를 이용하여 다종·다형의 교통안전시설 장치를 통합관제하고, 확장성과 유연성을 가지는 교통안전시설 장치 통합 시스템을 제안한다.

• Journal of Korea Port Economic Association
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• v.23 no.1
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• pp.19-39
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• 2007

Korean port developments have been mostly made by the central government. With the introduction of the Port Authority system, however, roles and function assignments of the central government in port development have been in change and the Port Authority has to find a solution for inducement of private investment in port development. This paper has examined the current legal system of port developments and then sought the way for inducement of private capital to improve specialty and efficiency of harbor facilities management and development under Port Authority. As the Ministry of Maritime Affairs and fisheries(MMAF) has two types of legal system for inducement of private investment on port developments, the Port Authorities can also have two types of private finance. Private finances by the Port Authorities has some more critical advantages than the one by the central government. It is also required to change the the administrative permissions and concession agreements which MMAF conveyed to private participants in port developments into the concession agreements between Port Authorities and private participants.

• Journal of Broadcast Engineering
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• v.20 no.2
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• pp.273-282
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• 2015

This study was to analyze the gambling media system, one of important factors in horse racing industry. The purpose of this study is to show a vision in special field of horse racing industry, which is examined as comparative analysis on domestic and foreign gambling media system in terms of Large Technological Systems by Hughes(1987). This study approaches in two different viewpoints. First, this study is to conceptualize the subjects of study in Large Technological System. Second, this study is to show common factors and differences on domestic and foreign gambling media system through conceptualization. This paper shows vision and implications like faster decision-making by authority's direct operating, competitive content development, future policy in accordance with the international open-door policy and broadcasting convergence for the balanced development of horse industry through the gambling media system, analyzing reverse salient which is the barrier of domestic gambling media system from comparative study.

• Korean Journal of Clinical Laboratory Science
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• v.45 no.4
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• pp.188-192
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• 2013

This study was conducted to develop the strategy for more effective internal marketing and promoting internal customer satisfaction by grasping the level of internal marketing operations targeting employees within hospital and empirically analyzing the effect of internal marketing operations on internal customer satisfaction. The findings reveal that there is a significant correlation between factors for internal marketing components and internal customer satisfaction. The average factor score for internal customer satisfaction is 3.230 out of 5, which is a little higher than normal levels. Counting down the five factors is as follows: internal communication, education and training, delegation of authority, welfare, compensation system, with compensation system shown as the lowest level and internal communication as the highest level. In addition, the result of multiple regression analysis conducted to inspect the effect of factors for internal marketing components on internal customer satisfaction indicates that among 5 factors, delegation of authority, education and training, and welfare have positive influences on internal customer satisfaction; whereas, compensation system has little effect on it.

• Journal of Radiation Protection and Research
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• v.26 no.3
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• pp.255-263
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• 2001

An Orphan Sources Control program controlled by a web based information system in Korea has been developed to satisfy the national demand on a total management of and integrated radiation safety. There are, currently, three approaches going on to control and manage the orphan sources in Korea. First, Korean regulatory authority has been conducting scrutinizing investigation on and thoroughly monitoring the possession of unlicensed radioactive sources from the late 1990s. Second, the regulatory authority will fully operate an information system on radiation safety to effectively trace and monitor all radioactive sources in the country by the mid 2001. Finally, the regulatory authority strongly advises steel mill companies to closely scrutinize and inspect the scrap metals when they attempt to reutilize metals to prevent from being contaminated by uncontrolled sources through the scrap monitoring systems.

• Proceedings of the KIEE Conference
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• 1987.07b
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• pp.889-893
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• 1987

This paper suggests a model for the economic evaluation and the selection of alternatives using teletraffic. Economic evaluation is analyzed by the comparison of revenue loss which happens without trunk extension and additional revenue which results from trunk extension. Simulation technique is used as a methodology to apply economic evaluation to telephone system. The study results will provide a support in a optimal decision about investment strategies.

• Transactions of the Korean Society of Automotive Engineers
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• v.15 no.3
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• pp.85-90
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• 2007

The main function of the Forward Vehicle Collision Warning System (FVCWS) is to warn a driver when he or she experiences dangerous situations caused by a forward vehicle. Warning distance algorithms under same dangerous circumstances are often various depending on automobile manufacturers and component suppliers. Human factors also should be considered to warn the driver at an adequate warning distance. Therefore, it is necessary to develop a system for evaluating the pertinent warning timing in an identically dangerous situation. The system consists of sensors for measuring speed and acceleration of subject vehicle and target vehicle, controllers to follow the velocity profile properly, and wireless telecommunication equipments for receiving or transmitting the measured data in a real-time. According to actual field tests, it is shown that the developed system is suitable to evaluate warning distance of FVCWS.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.15 no.1
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• pp.302-322
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• 2021

In the system of ciphertext policy attribute-based encryption (CP-ABE), only when the attributes of data user meets the access structure established by the encrypter, the data user can perform decryption operation. So CP-ABE has been widely used in personal health record system (PHR). However, the problem of key abuse consists in the CP-ABE system. The semi-trusted authority or the authorized user to access the system may disclose the key because of personal interests, resulting in illegal users accessing the system. Consequently, aiming at two kinds of existing key abuse problems: (1) semi-trusted authority redistributes keys to unauthorized users, (2) authorized users disclose keys to unauthorized users, we put forward a CP-ABE scheme that has authority accountability, user traceability and supports arbitrary monotonous access structures. Specifically, we employ an auditor to make a fair ruling on the malicious behavior of users. Besides, to solve the problem of user leaving from the system, we use an indirect revocation method based on trust tree to implement user revocation. Compared with other existing schemes, we found that our solution achieved user revocation at an acceptable time cost. In addition, our scheme is proved to be fully secure in the standard model.

• Journal of Power System Engineering
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• v.21 no.6
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• pp.46-55
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• 2017

Due to the arise of natural disasters caused by global warming, consumers have more interest in the fuel efficiency of their vehicles, and fuel efficiency became an important factor in comparing vehicles. In this market situation, methods to measure fuel efficiency has become one of the main interests of vehicle related organizations and laboratories, and the current method to measure fuel efficiency is to follow the notification established by the ministry of trade, industry and energy, ministry of environment, and the ministry of land, infrastructure and transport. In this study, we analyze the influence of vehicle fuel efficiency according to test temperature and cooling fan condition which have the possibility to cause difference in fuel efficiency. The analysis results of the influence of the fuel efficiency according to the test temperature, the difference of the fuel efficiency of the test temperature ($21{\sim}29^{\circ}C$) within the allowable range of the notification showed a maximum difference of 2.9%. Therefore, it is necessary to consider the introduction of a test method that permits only the temperature change based on the reference point as the allowable range even in the test within the allowable range. The analysis of the influence of the fuel efficiency according to the cooling method showed no significant effect, and it seems reasonable to maintain the test method of the current notification.

• The Korean Journal of Archival Studies
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• no.58
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• pp.147-190
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• 2018

Currently, the appraisal system for public records is mainly based on the disposition authority named 'Records Management Criteria Table,' which has many limitations in digital environment. Especially, it does not apply to other systems than the 'Business Management System' and does not adequately reflect the complex environment of records creation. The purpose of this study is to suggest ways to improve the 'Records Management Criteria Table,' so that it can be applied to appraisal of records created in a complex work environment. For this purpose, this study investigates a case of 'Factory Establishment and Registration' activity performed by local governments. For this activity, related laws and regulations, business processes and systems for those processes are analyzed and types of records are examined by each business process and system. Based on these analyses, the development procedure and structure of a new 'Records Management Criteria Table' are suggested, so that it can be applicable as disposition authority in the complex environments of records creation.