• Journal of the Korean Society for information Management
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• v.30 no.2
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• pp.245-268
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• 2013

The paper describes a case study in which Sungkyunkwan University Library participated in the official ARL(Assoication of Research Libraries) LibQUAL+ evaluation program. LibQUAL+ model is based on the SERVQUAL service quality evaluation model originally developed in the marketing area. It details a number of processes including translation of the LibQUAL+ survey instrument into Korean, selection of study sample and choice of survey versions. In addition, it offers a number of strategies that can be adopted in order to analyze the survey data for various comparisons among different user groups and institutions. LibQUAL+ is more that a survey instrument; it a holistic system for assessing library service quality. Despite criticisms on LibQUAL+, we expect that university libraries in Korean will benefit from participating in the program. It is preferable that a group of libraries form a consortium to participate in the LibQUAL+ program as opposed to individual participation. The consortium can function as a learning community through various workshops and sharing activities, thus elevate the overall evaluation efforts in Korean libraries to a higher level.

• Journal of the Korean Society for information Management
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• v.30 no.3
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• pp.157-181
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• 2013

Using user satisfaction surveys and LibQUAL+ instruments, libraries are increasingly gathering qualitative data such as verbatim user comments as well as quantitative data. Such qualitative data can be utilized as clues in establishing library service strategies: to better understand user issues, to identify areas for service improvement, and to prioritize user needs. For this, it is necessary to analyze user comments data and to apply results to the delivery of service and the library policies. This study is an attempt to investigate ways in which user comments data can be made useful in libraries. It identifies different methods of analyzing user comments data from LibQUAL+ surveys and compares qualitative data analysis software programs and taxonomies. It also presents the results of applying these tools to a subset of actual user comments data gathered from a recent LibQUAL+ survey at a major university library in Korea.

• Proceedings of the Korea Multimedia Society Conference
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• 2002.11b
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• pp.632-635
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• 2002

MPLS 네트워크에서 LIB 테이블은 네트워크의 성능에 아주 큰 영향을 미치며, 네트워크의 자원 이용률을 결정하는 중요한 인자이다. 본 논문에서는 MPLS 네트워크에서 LIB 테이블의 공간을 절약하는 방안을 제시하였다. 제안된 방식과 기존의 방식들에 대해 네트워크 시뮬레이션을 이용하여 측정한 결과, 제안된 방식의 T 값을 0.25초로 지정하면 평균 20%, T 값을 0.50초로 지정하면 평균 46%의 LIB 테이블 공간이 절약됨을 확인하였다.

• Proceedings of the Korean Society for Information Management Conference
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• 2010.08a
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• pp.133-138
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• 2010

LibQUAL+는 도서관서비스의 품질을 이용자에 의해 평가하는 평가도구이다. 이러한 LibQUAL+의 결과를 서비스 품질 향상을 위한 도서관 업무 개선을 위해 사용할 때, 대부분 추가정보를 사용하여 개선안을 마련하고 있으나, 도서관의 관점에서 볼 때 이러한 방법은 개선안의 평가방법 부재라는 문제가 있을 수 있다. 본 연구에서는 추가정보 없이 LibQUAL+의 결과데이터만을 사용하여 도서관 개선안을 개발하는 데에 도움을 줄 수 있는 분석틀을 탐색해본다. 이러한 분석틀은 나아가 LibQUAL+ 뿐 아니라 도서관 이용자의 관점에서 조사되는 다른 설문조사 결과의 분석틀로 이용될 수도 있을 것이다.

• Journal of the Korean Society for information Management
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• v.32 no.3
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• pp.131-154
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• 2015

Users tend to perceive differently the service quality of library depending on the advance of digital information technologies. It is necessary to analyze the cumulative results of LibQUAL+ in order to identify the suggestions for improvement of library services. This study aims to comparatively analyze the results of LibQUAL+ and demonstrate the trends and changes for the services of university library. To achieve the purpose of this study, two university libraries were selected for analysis. The library of McGill University in Canada was selected with the six years' results of LibQUAL+. Another library located in Seoul was selected with the 2012 result of LibQUAL+ and a new LibQUAL+ in 20015 was conducted for this study. The results were analyzed with three dimensions and 22 items in terms of circular chart, bar chart, and graph. Findings of this study indicated that there were substantial differences in terms of years of LibQUAL+ survey and user groups with undergraduate/graduate students in three dimensions. In particular, the results of A library showed that users were likely to expect more from the university library, but they perceived low service quality. In addition, there was found considerable differences among users groups in terms of undergraduate and graduate students. The improvements for library services need to focus on three dimensions such as staff, resources, and facilities as well as customized services for individual user groups.

• Journal of the Korean Institute of Gas
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• v.24 no.6
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• pp.91-97
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• 2020

Lithium-ion batteries (LIBs) have a longer lifespan, higher energy density, and lower self-discharge rates than other batteries, therefore, they are preferred as an Energy Storage System (ESS). However, during years 2017-2019, 28 ESS fire accidents occurred in Korea, and accurate capacity estimation of LIB is essential to ensure safety and reliability during operations. In this study, data-driven modeling that predicts capacity changes according to the charging cycle of LIB was conducted, and developed models were compared their performance for the selection of the optimal machine learning model, which includes the Decision Tree, Ensemble Learning Method, Support Vector Regression, and Gaussian Process Regression (GPR). For model training, lithium battery test data provided by NASA was used, and GPR showed the best prediction performance. Based on this study, we will develop an enhanced LIB capacity prediction and remaining useful life estimation model through additional data training, and improve the performance of anomaly detection and monitoring during operations, enabling safe and stable ESS operations.

• Journal of the Korean Society of Industry Convergence
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• v.27 no.1
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• pp.63-70
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• 2024

Lithium-ion batteries (LIB) are widely used in various sectors, such as transportation (e.g., electric vehicles (EV)) and energy (e.g., energy storage facilities) due to their high energy density, broad operating temperature (-20 ℃ ~ 60 ℃), and high capacities. LIBs are powerful but fragile on external factors, including pressure, physical damage, overheating, and overcharging, that cause thermal runaway causing fires and explosions. During a LIB fire, a large amount of oxygen is generated from the decomposition of ionogenic materials. A water fire extinguisher that helps with cooling and suffocating must be essentially required at the same time. In fact, however, it is difficult to suppress LIB fires in the case of EVs because a LIB is installed with a battery pack housing that interrupts direct extinguishing by water. Thus, this study aims to investigate effective fire extinguishing measurements for LIB fires by using an EV. Relevant documents, including research articles and reports, were reviewed to identify effective ways of LIBs fire extinguishing. A real-scale fire experiment generating thermal runaway was carried out to figure out the combustion characteristics of EVs. This study revealed that the most effective fire extinguishing measurements for LIB fires are applying fire blankets and water tanks. However, there is still a lack of adequate regulation and guidelines for LIB fire extinguishment. Taking this into account, developing functional fire extinguishment measurements and available regulatory instruments is an urgent issue to secure the safety of firefighters and citizens.

• Journal of the Korean Society for information Management
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• v.24 no.2
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• pp.5-27
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• 2007

While $LibQUAL+^{TM}$ is in the headlines of many articles focusing on library service evaluations, little research has been conducted to study the relationship between the $LibQUAL+^{TM}$ factors and the adoption of library services. It remains unclear whether the factors of $LibQUAL+^{TM}$ have any effect on its adoption. A framework was adapted from Icek Ajzen's theory of planned behavior and proposed to extract factors affecting the adoption of library services. The factors were examined via data collection from a Web-based questionnaire survey with college students in the United States. Factor analyses and multiple regression analysis were conducted. Findings show that the intention to use library services is explained by attitude toward library service quality. The attitudinal factors that are significant are (1) perceived personal control, (2) perceived affect of service, and (3) perceived comprehensiveness of information. The relative importance among the factors is also represented by the numbered sequence. However, perceived timeliness of information access and the perception of library as place do not have a significant effect on the intention. This study extends the research on library service evaluation, and provides a new evaluation framework by applying adoption behaviors.

• Resources Recycling
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• v.33 no.1
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• pp.58-68
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• 2024

Critical minerals such as nickel, cobalt and lithium, are known as materials for cathodic active materials of lithium ion batteries. The consumption of the minerals is expected to grow with increasing the demands of electric vehicles, resulting from carbon neutrality. Especially, the demand for LIB (lithium ion battery) recycling is expected to increase to meet the supply of nickel, cobalt and lithium for LIB. The recycling of EOL (end-of-life) LIB can be achieved by leaching EOL LIB using inorganic acid such as HCl, HNO₃ and H₂SO₄, which are regarded as hazardous materials. In the present study, the potential use of MSA (Methanesulfonic acid), as an alternative lixiviant replacing sulfuric acid was investigated. In addition, leaching behaviors of NCM black mass leaching with MSA was also investigated by studying various leaching factors such as chemical concentration, leaching time, pulp density (P/D) and temperatures. The leaching efficiency of nickel (Ni), cobalt (Co), lithium (Li), and manganese (Mn) from LIB was enhanced by increasing concentration of lixiviant and reductant, leaching time and temperature. The maximum leaching of the metals was above 99% at 80℃. In addition, MSA can replace sulfuric acid to recover Ni, Co, Li, Mn from NCM black mass.

• Journal of the Korean Society for information Management
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• v.31 no.3
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• pp.65-87
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• 2014

Organizational communication is an element of organizational structure formation; it is also a process of achieving organizational goals through the information sharing among the staff members in the organization as a social system. Organizational performance is a multidimensional concept composed of efficiency and effectiveness and satisfaction. Effectiveness implies service quality and the degree of goal achievement. Service quality by using the $LibQUAL+^{TM}$ model can be considered as an objective performance measure for libraries. This study aims to identify the effect of organizational communication in public libraries on service quality as a performance measure using the $LibQUAL+^{TM}$ model through statistical analyses of the results from questionnaire surveys of librarieans and users in 8 public libraries in Seoul metropolitan area. The result says the characteristics of organizational communication(upward, horizontal, downward communication) affects the three elements in the library service quality, such as affect of service, information control and library as place.