• Journal of Electrical Engineering and Technology
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• v.11 no.6
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• pp.1664-1673
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• 2016

Lithium rechargeable cells are used in many industrial applications, because they have high energy density and high power density. For an effective use of these lithium cells, it is essential to build a reliable battery management system (BMS). Therefore, the state of charge (SOC) estimation is one of the most important techniques used in the BMS. An appropriate modeling of the battery characteristics and an accurate algorithm to correct the modeling errors in accordance with the simplified model are required for practical SOC estimation. In order to implement these issues, this approach presents the comparative analysis of the SOC estimation performance using equivalent electrical circuit modeling (EECM) and noise suppression technique (NST) in three representative $LiCoO_2/LiFePO_4/LiNiMnCoO_2$ cells extensively applied in electric vehicles (EVs), hybrid electric vehicles (HEVs) and energy storage system (ESS) applications. Depending on the difference between some EECMs according to the number of RC-ladders and NST, the SOC estimation performances based on the extended Kalman filter (EKF) algorithm are compared. Additionally, in order to increase the accuracy of the EECM of the $LiFePO_4$ cell, a minor loop trajectory for proper OCV parameterization is applied to the SOC estimation for the comparison of the performances among the compared to SOC estimation performance.

• Korean Medical Education Review
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• v.19 no.2
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• pp.76-82
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• 2017

The quantitative expansion of nursing schools has necessitated the qualitative improvement of nursing education, which requires the development of nursing education for clinical practice. To identify strategies for strengthening the educational capacity of clinical fields and nursing schools, this study first examined the current status of nursing education for clinical practice, and then proposed several prospective directions for education. Nursing clinical practice-related studies from several Korean and international electronic databases were reviewed. Insufficient training hospitals and lack of qualified clinical training instructors were the main problems found within nursing educational resources for clinical practice, while the simple practice contents based on observation and inadequate evaluations were the main problems found in nursing educational management for clinical practice. This study suggests better standards and educational accountability for training hospitals and programs to nurture human resources for clinical practice, as well as a variety of training methods to integrate practical training courses and the expansion of formation evaluation. Based on these results, it is necessary to establish governance for nursing education for clinical practice and clarify the role and standards of each practitioner, strengthen the educational role of the hospital, and improve the system. In addition, introducing various types of education methods and strengthening evaluation standards are needed in order to enhance nursing education for clinical practice.

• Journal of Ecology and Environment
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• v.41 no.3
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• pp.78-84
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• 2017

Recently, great demands are rising around the globe for monitoring and studying of long-term ecological changes. To go with the stream, many researchers in South Korea have attempted to share and integrate ecological data for practical use. Although some achievements were made in the meantime, we still have to overcome a big obstacle that existing ecological data in South Korea are mostly spread all over the country in various formats of computer files. In this study, we aim to handle the situation by developing a semi-automatic data conversion tool for Korean ecological data standardization, based on some predefined protocols for ecological data collection and management. The current implementation of this tool works on only five species (libythea celtis, spittle bugs, mosquitoes, pinus, and quercus mongolica), helping data managers to quickly and efficiently obtain a standardized format of ecological data from raw collection data. With this tool, the procedure of data conversion is divided into four steps: data file and protocol selection step, species selection step, attribute mapping step, and data standardization step. To find the usability of this tool, we utilized it to conduct the standardization of raw five species data collected from six different observatory sites of Korean National Parks. As a result, we could obtain a common form of standardized data in a relatively short time. With the help of this tool, various ecological data could be easily integrated into the nationwide common platform, providing broad applicability towards solving many issues in ecological and environmental system.

• Journal of Fisheries and Marine Sciences Education
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• v.29 no.3
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• pp.677-688
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• 2017

The purpose of this study is to analyze the action learning lesson about the improvement process of the job support program of P university students. As a research method, we applied the related classes during the semester to the students who took courses in the course of 'Human Resource Development', which is a subject of P university, and analyzed the learner's reflection journal, interview data. As a result of the research, we went through the problem selection stage, the team construction and the team building stage. And then we searched for the root cause of the problem, clarified the problem, derived the possible solution, determined the priority and created the action plan. There are 10 solutions to the practical problems of poor job camps. Through two interviews with field experts it offered final solutions focused on promoting employment and Camp students participate in the management of post-employment into six camps. According to the first rank, job board integration, vendor selection upon student feedback, reflecting improved late questionnaire, public relations utilizing KakaoTalk, recruiting additional selection criteria, the camp provides recorded images in order. The results of this study suggest that the university's employment support program will strengthen the competitiveness of students' employment and become the basic data for the customized employment support program.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.10
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• pp.5039-5061
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• 2017

Cloud storage becomes a new trend that more and more users move their data to cloud storage servers (CSSs). To ensure the security of cloud storage, many cloud auditing schemes are proposed to check the integrity of users' cloud data. However, most of them are based on public key infrastructure, which leads to complex certificates management and verification. Besides, most existing auditing schemes are inefficient when user uploads a large amount of data or a third party auditor (TPA) performs auditing for multiple users' data on different CSSs. To overcome these problems, in this paper, we propose an efficient and secure auditing scheme based on identity-based cryptography. To relieve user's computation burden, we introduce a proxy, which is delegated to generate and upload homomorphic verifiable tags for user. We extend our auditing scheme to support auditing for dynamic data operations. We further extend it to support batch auditing in multiple users and multiple CSSs setting, which is practical and efficient in large scale cloud storage system. Extensive security analysis shows that our scheme is provably secure in random oracle model. Performance analysis demonstrates that our scheme is highly efficient, especially reducing the computation cost of proxy and TPA.

• Archives of Plastic Surgery
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• v.43 no.6
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• pp.590-594
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• 2016

Recently, the number of cases of animal bite wounds has increased significantly in concordance with an increase in the pet population around the world. The authors report two rare cases of osteomyelitis of the phalanx following cat and dog bites. On initial physical examination, signs of a severe infection were observed. Radiographs of both patients showed the presence of osteomyelitis, and in one of the patients, the diagnosis was confirmed with a bone biopsy. After use of empirical antibiotics, intravenous antibiotic therapy that matched the identified bacterium's sensitivity was initiated, and at the same time, secure dressing including debridement was performed to induce secondary healing. In addition, the patients were closely monitored with serial X-rays, and culture and blood test follow-up. One patient fully recovered without sequelae, but the other patient suffered a loss of distal interphalangeal joint motion. When dealing with bite wounds located on the hand, it is important to visit the hospital as soon as possible and receive the appropriate treatment early. Moreover, to prevent severe complications such as osteomyelitis, it is important to administer antibiotic therapy to which the cultured bacteria are sensitive, along with proper wound management and prophylactic antibiotic treatment.

• Journal of Digital Convergence
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• v.16 no.8
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• pp.1-10
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• 2018

With advances in digital technologies digital crimes also rapidly have been increased. For this reason, the digital forensics has an important role in investigating digital crimes. In particular digital evidence analysts have been responsible for more workloads as much increased as it reflects an importance of their task. However previous researches have more focused on technology, not much on their work circumstance and behaviors. This study is to draw out factors affecting job stress and its effects on their turnover rate as it considers Job satisfaction, organization commitment. In this study, survey have been conducted targeting 124 personnel in National Police Agency and then the collected data were analyzed by using Smart PLS 3.0. This study have proved that causal relationship between job stress, satisfaction, commitment and job turnover respectively which is borrowed from organizational concepts. There will be theoretical and practical contribution to improve work circumstance and secure digital forensic talents as well.

• Journal of Digital Convergence
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• v.16 no.8
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• pp.117-128
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• 2018

China's rapid economic growth is continuous but the country still has a long way to become a center for creativity. Leaders have no idea how to encourage their employees to work more efficiently in Chinese companies. Meanwhile the majority of employees are not fully engaged in their work, sometimes they think their work is not meaningful. The purpose of this study is to explore the relationship between transformational leadership and employee creativity, through perceptions of meaning in work and work engagement among employees working in XunLei Networking Technology Corporation. 140 valid data were collected and were analysed using SPSS and AMOS. Results showed that transformational leadership has a positive and significant influence on meaning in work and work engagement. Meaning in work has a significant effect on work engagement, and work engagement has a significant influence on employee creativity. This study provides both academic and practical implications about transformational leadership and employee creativity through meaning in work and work engagement.

• Journal of Information Technology Services
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• v.17 no.3
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• pp.117-138
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• 2018

The purpose of this study is to empirically analyze the relationships between the Boundary Spanning Activities (BSA) of project team and system performance in ERP system development projects. We could theoretically classify the BSA in the ERP development projects into five categories on the basis of existing studies on the BSA in the research fields of organization theory, new product development, and information systems development. These five categories are 'Ambassador' activities, 'Task-coordinator' activities, 'Scout' activities, 'Sentry' activities and 'Guard' activities. And the relationship between the implementation level of activities included in each category and the project performance (system usage and users' satisfaction) was hypothesized with respect to five BSA categories. In order to test the hypotheses, we conducted on/offline survey of the participants who were involved in the ERP system development projects, and received 345 valid responses. The unit of analysis was the project team, and the total number of teams that survey participants belonged to were 103 ones. The Structural Equation Model Analysis using the SMART PLS 3.0 was applied to statistically testing the hypotheses. The results showed that 10 hypotheses among 12 hypotheses could be supported. The theoretical implications of this study can be summarized as following; first, redefining and categorizing the BSA (Boundary Spanning Activities) in the ERP system development projects, secondly, deriving measurement indicators of the implementation level for each BSA category and statistically proving the validity and the reliability of them, and finally, suggesting the theoretical background of expanding the management area of ERP systems development projects. Furthermore, the practical implication of this study is that concrete BSA items which are empirically derived can be utilized as effective guidelines for successfully implementing the BSA in the process of managing the ERP system development projects.

• Proceedings of the Korea Contents Association Conference
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• 2006.11a
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• pp.689-692
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• 2006

As $\ulcorner$Law about efficient introduction and operation etc. of information system$\lrcorner$ that is called ITA law is enforced by July 1, 2006, Information Technology Architecture introduction is beginning in earnest in public institution. Because information present condition grasping, policy-making, and efficiency of information investment decision are increased in country dimension through Information Technology Architecture. This paper introduces Information Technology Architecture's concept and domestic Information Technology Architecture construction's present condition, NTIS Information Technology Architecture construction example, and describes about 'Information Technology Architecture Framework' that is the point of 'Information Technology Architecture base thesis' for Information Technology Architecture induction, practical use and management among them.