• Journal of KIISE:Information Networking
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• v.32 no.4
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• pp.443-451
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• 2005

Stateful inspection devices must maintain flow information. These devices create the flow information also for network attack packets, and it can fatally inflate the dynamic memory allocation on stateful inspection devices under network attacks. The memory inflation leads to memory overflow and subsequent performance degradation. In this paper, we present a guideline to set the flow entry timeout for a stateful inspection device to remove harmful embryonic entries created by network attacks. Considering Transmission Control Protocol (TCP) if utilized by most of these attacks as well as legitimate traffic, we propose a parsimonious memory management guideline based on the design of the TCP and the analysis of real-life Internet traces. In particular, we demonstrate that for all practical purposes one should not reserve memory for an embryonic TCP connection with more than (R+T) seconds of inactivity where R=0, 3, 9 and $1\leqq{T}\leqq{2}$ depending on the load level.

• Proceedings of the KSR Conference
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• 2011.05a
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• pp.413-422
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• 2011

A battery is an important part of the component, as a power source of the control of rolling stock at starting movement or emergency control. Now widely used batteries are Ni-Cd batteries and lead accumulators, and these are increasingly getting smaller and lighter. In addition, the electric capacity required is increasing, due to the development of electronic control technology of rolling stock. Therefore, various kinds of high-efficiency battery are considered for the new routes' rolling stock, but rolling stock's batteries should be fully tested to prove safety and also have no difficulty in terms of management, so because of the requirement, it is difficult to be in practical application. In this paper, we will survey cases of applying battery to rolling stock and then we will review whether there is any problem about safety and performance, management to discuss future trend of batteries.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• v.17 no.2
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• pp.61-73
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• 2014

Presented are guidelines for the prevention, diagnosis, and treatment of cow's milk protein allergy (CMPA) which is the most common food allergy in infants. It manifests through a variety of symptoms that place a burden on both the infant and their caregivers. The guidelines were formulated by evaluation of existing evidence-based guidelines, literature evidence and expert clinical experience. The guidelines set out practical recommendations and include algorithms for the prevention and treatment of CMPA. For infants at risk of allergy, appropriate prevention diets are suggested. Breastfeeding is the best method for prevention; however, a partially hydrolyzed formula should be used in infants unable to be breastfed. In infants with suspected CMPA, guidelines are presented for the appropriate diagnostic workup and subsequent appropriate elimination diet for treatment. Exclusive breastfeeding and maternal dietary allergen avoidance are the best treatment. In infants not exclusively breastfed, an extensively hydrolyzed formula should be used with amino acid formula recommended if the symptoms are life-threatening or do not resolve after extensively hydrolyzed formula. Adherence to these guidelines should assist healthcare practitioners in optimizing their approach to the management of CMPA and decrease the burden on infants and their caregivers.

• Journal of Korean Society of Transportation
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• v.34 no.1
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• pp.55-67
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• 2016

The purpose of this study is to analyze the correlation and the causal relation between the service quality, customer satisfaction and revisit intent of an urban railway. A structural equation model(SEM) was developed and analyzed using SPSS 21.0 and AMOS 21.0. The results showed that it satisfies the fitness of the model mostly: the reliability, convenience, safety of the service quality have a significant positive impact on the customer satisfaction (p<.05) and the tangibles(-.187) and responsiveness(-.103) have no impact on the customer satisfaction (p>.05.). The customer satisfaction has a significant positive impact on revisit intention (p<.001). The factors affecting the service quality and customers' satisfaction were found to be ranked as the order of reliability, convenience, safety, responsiveness, tangibility based on the high priority. The findings of this study will contribute to provide a practical tool to establish a mid-long term management plan and management strategies for boosting the customer satisfaction and creating revenue through the customized service of urban railway operating industry suffering chronic deficit.

• Journal of Digital Convergence
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• v.14 no.5
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• pp.57-66
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• 2016

In this paper, we describe capstone-related courses in the Computer information department of Dongyang-Mirae University and propose a capstone design model for computer engineering discipline based on operating experiences during the last year. Class schedules and contents, etc are presented from the case studies of two courses on system analysis and design and graduation work(capstone design) opened in 2015. Towards the successful operation of capstone design targeted to training practical and talented professionals with creative problem-solving skills, we propose six execution steps along with principal activities and outputs: Course plan, Project plan, Development, Reporting, Evaluation of students and coursework, and Course feedback. The capstone design model of this study is characterized by presenting the necessity and importance of pre and post steps such as 'Course Plan' and 'Course reflux' from a macroscopic view and by applying software engineering techniques such as prototyping, configuration managements, etc to it.

• Journal of Korea Multimedia Society
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• v.18 no.4
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• pp.546-556
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• 2015

Since the concept of software engineering was first used in 1968 by NATO Science Committee, a lot of research work and improvements have been made on software development methodology and software quality control, but they still fall short of ensuring successful development of small and medium scale software systems. Under these circumstances, Center for Software Engineering (CSE) at National IT Industry Promotion Agency(NIPA) has been conducting studies on quality control methodologies of software visualization well-suited for small and medium scale software systems, and also working on the systemization and quantification of software quality control. In this paper, we attempt to scope on the software development management of domestic and foreign small and medium-sized enterprises that are lying in the blind spot, compared to large enterprises with well-organized software development systems. In particular, based on software visualization that CSE is pursuing for small and medium-sized developers, we propose a practical quality control methodology well-suited for small and medium scale projects, and a low-cost quality control management tool by combining open-source quality control tools. Our proposal is expected to induce developers' mind change in SI-specialized small and medium-sized software enterprises, increase their profits and improve customer satisfaction through project quality control.

• Journal of the Society of Disaster Information
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• v.8 no.1
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• pp.93-99
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• 2012

This study is to present false alarm management of alarm monitoring service, by literature analysis and interview with the persons in charge of service of alarm monitoring service companies. To reduce false alarm by customer's mistake, development of educational tool that could provide practical effect is needed. Also institutional consent to charge a specific sum of money could be considered for unnecessary dispatch that occurred by customer's mistake. To improve the false alarm by defect of equipments and installation of electronic security system, standardization of technical regulation and system installation is necessary. And to improve the performance of passive infrared sensor that cause most false alarm, the development of new type of sensor is required. It could be considered that guideline on educational contents and term definition about false alarm could be come under the security regulation.

• The Journal of Korean Academic Society of Nursing Education
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• v.20 no.2
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• pp.288-299
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• 2014

Purpose: The purpose of this study was to investigate the current status of the 3+1 curriculum implementation of nursing college in transition from a three-year to a four-year nursing education system. Method: This study employs a triangulation study including a questionnaire survey and a focus group interview. The data collected from 34 nursing colleges were analyzed using SPSS/WIN 21.0 program and the interview data(9 department chairs of nursing colleges) were analyzed using qualitative content analysis. Results: The important results are as follows; Many colleges applied academic performance as student selection standards. Factors in students' satisfaction are acquiring the bachelor's degree and a lot more relaxed college life. Factors in students' dissatisfaction are anxiety about national nursing exam and absence of college's own specialized programs. Main points of 3+1 course policy making are strengthening character education and core-fundamentals education in nursing. After qualitative contents analysis, three management-related subjects and 7 sub-subjects emerged. Three subjects were the effects of the 3+1 course running, the difficulties in management and how to run the 3+1 course effectively. Conclusion: From the results of this study, we concluded with some practical implications for the 3+1 course running for reformed nursing schools.

• CRM연구
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• v.4 no.1
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• pp.35-54
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• 2011

Organizing and maintaining customer-based online communities are becoming increasingly important in current business environment. Companies can utilize the member generated contents in developing their products and services and they can establish close relationships with their customers. This paper investigates how customer-based online communities increase individual members' contributive behaviors. Drawing on the social psychology literature, this study adopts the concept of self-discrepancy rooted in self-identity and derive an index for self-discrepancy by using the differences between actual and virtual self-identities. Furthermore, this study examines the relationship between the self-discrepancy and the anonymity-related psychological factors (autonomy, recovery, and catharsis), which in turn influence quality and quantity of contribution. Analysis of 114 respondents showed that self-discrepancy between actual and virtual selves has two different sub-dimensions (personal self-discrepancy and social sel f-discrepancy) and each dimension has different effect on the quality and quantity of contribution through the mediation of autonomy and recovery. Notably, catharsis negatively influenced quality of contribution. Theoretical and practical implications are discussed based on the major findings.

• Journal of the Korean Institute of Educational Facilities
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• v.19 no.1
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• pp.13-24
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• 2012

Recently, many middle and high schools are remodeling the buildings and facilities based on departmental system. This study, through analyzing on 10 remodeling cases of high school, is showing the variation before and after remodeling, space organization types, and the types of school management. This also gives us the information on the number of classrooms and teachers' rooms for each subject, the area and number of home base, and the current state of all these facilities. Furthermore, this study is comparing and analyzing the rate of use of specialized classrooms to the type of management. Through this analysis, we reach the following conclusions. l. However all the cases remodeled their buildings to implement departmental system, the methods of space composition, the numbers of the classrooms, and the status of home base are in various forms. 2. Taken as a whole, there are only few spaces used by departmental system. 3. The spaces for practical subjects such as Science and Art are inadequate than the ones for major subjects such as Languages and Mathematics. 4. A system to assign a room for a teacher records the lowest space usage rate. 5. The area of home base per one student is only $0.48m^2$, and even the area is mostly filled with lockers. The present condition of the 10 high schools which we surveyed shortly after remodeled shows that departmental system is not firmly settled down yet.