• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.4
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• pp.1825-1830
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• 2014

Environmental emission of recent automobile is drastically enhanced that it is one of the obvious assignments of exhaust system. This study is a purpose to establish of influence distribution on maxima and minima through the location of pressure on exhaust variable valve. The experiment are checked with real angles using camera which exhaust variable valve is opened side of point. Data has extracted to opening angles with internal flow, pressure. Exhaust variable valve through the floating analysis was analyzed the characteristic of location point about pressure and velocity. The pressures indicated the reduced results internal pressure within muffler. The velocity indicated an opposite results and vibration state of valve was verified to be operated as high speed from lower section. The conclusion to obtain from this study was found out the result to make the optimum back pressure condition as more increasing pressure distribution on valve face if the velocity location attracted by bottom point in order to improve for engine performance.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.26 no.1
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• pp.259-273
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• 2016

After realizing through the three large-scale data leakage incidents that intentional or accidental insider jobs are more serious than external intrusions, financial companies in Korea have been taking measures to prevent data leakage from occuring again. But, the IT system architecture reflecting the domestic financial environment is highly complicated and thereby difficult to grasp. It is obvious that despite administrative, physical, and technical controls, insider threats are likely to cause personal data leakage. In this paper, we present a process that based on metadata defines and manages personally identifiable attribute data, and that through inter-table integration identifies personal information broadly and controls access. This process is to decrease the likelihood of violating compliance outlined by the financial supervisory authority, and to reinforce internal controls. We derive and verify a decision-making model that reflects the proposed process.

• Journal of Service Research and Studies
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• v.5 no.1
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• pp.1-15
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• 2015

Service has its aim to maximize customer loyalty for companies to improve business productivity by differentiation from the competition. Public transport services using, the needs and demands of consumers also appear very differently than in the past, looking at the service of the company eye-level of the consumer Is increasing more and more. In order to survive in this environment, companies work together to improve the level of service and ensure customer loyalty is essential. In order to improve our service. What's more, it can be said that it is important to actively participate in the work of the internal customer, employee morale boost. In order to improve customer satisfaction has a service-oriented members should respond to customers and make a good company to work also affects the internal staff to verify this service-oriented and affect. In this study, to be urban rail service orientation of the staff working in the field of operational agencies in the future to measure the impact of many companies to promote the GWP proposes to create a good business implications.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.27 no.3
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• pp.501-519
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• 2017

With the revolution of IT technology, cyber threats and crimes are also increasing. In the recent years, many large-scale APT attack executed domestically and internationally. Specially, many of the APT incidents were not recognized by internal organizations, were noticed by external entities. With fourth industrial revolution(4IR), advancement of IT technology produce large scale of sensitive data more than ever before; thus, organizations invest a mount of budget for various methods such as encrypting data, access control and even SIEM for analyzing any little sign of risks. However, enhanced intelligent APT it's getting hard to aware or detect. These APT threats are too much burden for SMB, Enterprise and Government Agencies to respond effectively and efficiently. This paper will research what's the limitation and weakness of current defense countermeasure base on Cyber Kill Chain process and will suggest effective and efficient APT defense operation model with considering of organization structure and human resources for operation.

• Progress in Medical Physics
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• v.14 no.1
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• pp.43-50
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• 2003

PACS mostly has been used in large scaled hospital due to expensive initial cost to set up the system. The network of PACS is independent of the others: network. The user's PC has to be connected physically to the network of PACS as well as the image viewer has to be installed. The web based mini-PACS can store, manage and search inexpensively a large quantity of radiologic image acquired in a hospital. The certificated user can search and diagnose the radiologic image using web browser anywhere Internet connected. The implemented Image viewer is a viewer to diagnose the radiologic image. Which support the DICOM standard and was implemented to use JAVA programming technology. The JAVA program language is cross-platform which makes easier upgrade the system than others. The image filter was added to the viewer so as to diagnose the radiologic image in detail. In order to access to the database, the user activates his web browser to specify the URL of the web based PACS. Thus, The invoked PERL script generates an HTML file, which displays a query form with two fields: Patient name and Patient ID. The user fills out the form and submits his request via the PERL script that enters the search into the relational database to determine the patient who is corresponding to the input criteria. The user selects a patient and obtains a display list of the patient's personal study and images.

• Journal of the Korea Society of Computer and Information
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• v.15 no.4
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• pp.75-82
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• 2010

At this time, our country's social welfare system for the handicapped is switching to increase independence, education is the most important. This study increases the quality of Visual handicapped people's life which have limit to learn and reduces their inconvenience which may occur during their independent school life through the development of the system which helps them safely to reach their destination by themselves using IT technologies in an educational institute which helps their ability to get information and be independent. This study supports Visual handicapped people to move safely by using cell phone which is necessary items for most modern people, RFID tags and white canes with antenna and reader which read the information installed in the raised blocks outside of school buildings and in the hall or aisle inside of buildings and inform the path by voice and vibration.

• The Journal of the Korea Contents Association
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• v.18 no.1
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• pp.403-411
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• 2018

This study analyzes the attitude toward new products through case studies. The contents of the case study applied to the study were analyzed about the attitude of the new product to the recently screened movie "Sanguiwon(the royal tailor)". The court was an institution that oversees the clothes of the royal family in the Chosun Dynasty. In a conservative and closed market environment, attitudes toward acceptance of new products are strongly influenced by internal and external factors. Authoritative and conservative attitudes to secure competitive advantage in existing markets ultimately hamper the acceptance of new products or cause externalities. Eventually, innovative resistance to new products emerges. On the other hand, the acceptance of new products in an open market will form an attitude toward new products, once they form a respectful attitude towards their own benefit or attitude. These market leaders, depending on the way they pursue their values, form an attitude to adhere to their products or accept innovation. The validity of this study was verified through other cases. Ultimately, success in the market for new products suggests that success can only be achieved by understanding the delivery of value to consumers.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2010.11a
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• pp.235-240
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• 2010

Transpiration cooling is the most effective cooling technique for liquid rocket and air-breathing engines operating in aggressive environments with higher pressures and temperatures. Combustor liners and turbine vanes are cooled by the coolant(air or fuel) passing through their porous walls and also the exit coolant acting as an insulating film. However, its practical implementation has been hampered by the limitations of available porous materials. The search for more practical methods of increasing the internal heat transfer within the walls has led to the development of multi-laminate porous structures, such as Lamilloy$^{(R)}$ and Transply$^{(R)}$. This paper reviews recent research activities of transpiration cooling for the propulsions of liquid rocket, gas turbine, and scramjet.

• Journal of the Society of Disaster Information
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• v.19 no.1
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• pp.204-215
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• 2023

Purpose: In this study, it was proposed a plan to build the Continuous Preventive Audit System in the military Organization with the expectation that we will develop an efficient audit method under the rapidly changing audit and work environment in the future. Method: it was examined the realities and problems of the military self-audit, the cases of the Continuous Preventive Audit System currently being used by government departments and institutions and internal control inspection of the information system of the Foreign Audit Office. Result: Government departments, agencies, and foreign auditors have established a Continuous Preventive Audit System to overcome the problems and limitations of their own audits, ensuring accounting accident prevention and audit work efficiency and are focused on auditing internal controls of information systems. Conclusion: In the future, more specific studies on the design of detailed scenarios for each function of defense work and the research and analysis on the improvement of defense information system should be followed for the establishment and settlement of a more specific Continuous Preventive Audit System.

• Journal of the Korean Society of Propulsion Engineers
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• v.27 no.1
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• pp.49-57
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• 2023

The autogenous pressurization has been widely adopted for propulsion systems of next-generation reusable rockets due to its low cost and high reliability. The autogenous pressurization has a simple structure, but an understanding of the heat and mass transfer occurring inside the tank is essential. For this reason, a simulation test of the autogenous pressurization was conceived. The experiment equipment was constructed based on overseas pressurization test facilities cases and expert advice. Unlike the actual autogenous pressurization system, the propellant tank was insulated to exclude external influences. The pressurized gas supply line and the propellant pipe were separated. Using the manufactured autogenous pressure experiment equipment, it is possible to evaluate the condensation phenomenon of pressurants in cryogenic propellants, comparison of the efficiency of pressurization using helium and evaporated gas and the pressurization capacity according to the temperature of pressurant.