• Title/Summary/Keyword: User's Opinions

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An Opinionated Document Retrieval System based on Hybrid Method (혼합 방식에 기반한 의견 문서 검색 시스템)

  • Lee, Seung-Wook;Song, Young-In;Rim, Hae-Chang
    • Journal of the Korean Society for information Management
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    • v.25 no.4
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    • pp.115-129
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    • 2008
  • Recently, as its growth and popularization, the Web is changed into the place where people express, share and debate their opinions rather than the space of information seeking. Accordingly, the needs for searching opinions expressed in the Web are also increasing. However, it is difficult to meet these needs by using a classical information retrieval system that only concerns the relevance between the user's query and documents. Instead, a more advanced system that captures subjective information through documents is required. The proposed system effectively retrieves opinionated documents by utilizing an existing information retrieval system. This paper proposes a kind of hybrid method which can utilize both a dictionary-based opinion analysis technique and a machine learning based opinion analysis technique. Experimental results show that the proposed method is effective in improving the performance.

Analysis of User Experience for the Class Using Metaverse - Focus on 'Spatial' - (메타버스의 수업활용에 관한 사용자 경험 분석 - 스페이셜(Spatial)을 중심으로 -)

  • Lee, Yejin;Jung, Kwang-Tae
    • Journal of Practical Engineering Education
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    • v.14 no.2
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    • pp.367-376
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    • 2022
  • In this study, the user experience was analyzed from the learner's point of view, focusing on the metaverse platform 'Spatial'. SUS(System Usability Scale) was used to evaluate the usability of the metaverse platform 'Spatial' in a college class, and the Magnitude estimation technique was used to evaluate the immersion and satisfaction with the class. In addition, a questionnaire survey was used to collect user experience opinions on the use of 'Spatial' as a teaching tool. Looking at the usability evaluation results of the 'Spatial' system, the students evaluated the usability, immersion, and satisfaction quite positively. Looking at the user experience of metaverse platform 'Spatial', it was found that students highly valued Metaverse as an educational tool that can provide a place for many people to gather and communicate even in a non-face-to-face space. Compared to other online platforms, metaverse has advantages in ease of use, interaction, immersion, and interest. In particular, in addition to keyboard, touch, and display, interaction using the five senses such as voice, motion, and gaze was recognized as a great advantage. On the other hand, it was found that high openness, freedom, and interest factors can both promote learning and inhibit learning. Nevertheless, it is judged that the metaverse platform 'Spatial' can be effectively applied in college classes because it enables various interactions between instructor and learner or between learner and learner.

A Study on the Considerable Factors for Development of Military Vehicles (군용차량 개발시 고려요소 개발 연구)

  • Lee, Bum-Koo;Cha, Hyun-Jong;Yang, Ho-Kyung;Ryou, Hwang-Bin;Jo, Yong-Gun
    • Convergence Security Journal
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    • v.11 no.1
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    • pp.49-56
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    • 2011
  • Recently, the army make plans for the development of new conceptual military vehicles. As the development of military vehicles, we need selecting of considerable factors for solution of user's additional requirements, systematic and efficient development management of military vehicles. For this study, we made up questions from 4 specialist's groups about military vehicles as manager group, operator group, maker group, researcher group. There were 22 selected factors in the result of gathering the specialists' opinions and the result of this study will useful for hereafter development of military vehicles.

Case of Service Design Process for Medical Space Focused on Users (사용자중심 의료공간을 위한 서비스디자인 프로세스의 적용사례)

  • Noh, Meekyung
    • Journal of The Korea Institute of Healthcare Architecture
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    • v.21 no.4
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    • pp.27-36
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    • 2015
  • Purpose: Of late, the focus of service design is moving toward emphasizing customer satisfaction and taking users' experience more seriously. In addition to the change in perspective in service design, scholars in this area are paying more attention to service design methodology and process, as well as its theory and real-world case studies. In the case of medical space, there have been few studies in attempting to apply service design methods useful for deriving user-focused results. The author of this paper believes, however, case study-oriented approaches are more needed in this area rather than ones focusing on theoretical aspects. The author hopes thereby to expand the horizon to practical application of spatial design beyond service design methodology. Methods: In order to incorporate the strengths of service design methodology that can reflect a variety of user opinions, this study will introduce diverse tools in the framework of double diamond process. In addition, it will present field cases that successfully brought about best results in medical space design. It will end with summarizing the ideal process of medical space design which is reasonable and comprehensive. Results: Medical service encompasses preventive medicine as well as treatment of existing medical conditions. A study in establishing the platform of medical service design consists of a wide range of trend research, followed by the summary of two-matrix design classification based on results of the trend research. The draft of design process is divided into five stages composed of basic tools for establishing spatial flow lines created by matching service design tools with each stage of space design processes. In all this, most important elements to consider are communication and empathy. When service design is actually applied to space design, one can see that output has reflected the users' needs very well. The service design process for user-oriented medical space can thus be established by interactions on the final outcome and feedback on the results. Implications: One can see that the service design with the hospital at its center produces the result that encompasses the user's needs best. If the user-focused service design process for medical space can be extended to other space designs, the author believes that it would enhance the level of satisfaction for users and minimize trials and errors.

Discussions on the Accessibility of School Library DLS Catalogue Records - Focused on Literary Collections - (학교도서관 DLS 목록의 자료 접근성에 대한 논의 - 문학 분야 장서를 중심으로 -)

  • Kang, Bong-Suk;Jung, Youngmi
    • Journal of Korean Library and Information Science Society
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    • v.50 no.4
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    • pp.539-559
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    • 2019
  • One of the fundamental roles of libraries is to provide users with efficient and easy retrieval of materials. Various discussions have been made at domestic and abroad to improve the accessibility of materials by category, user, and collection, and at the center of this is the issue of improving classification and cataloging systems. However, there are few studies in this area dealing with the data accessibility of the DLS catalog, which is a central tool for accessing domestic school library materials. This study started from the appeal of school library users to the difficulty of searching and accessing books, especially literature. This study is an exploratory study that attempts to derive problems by finding the causes of there difficulties from various aspects. To this study, we surveyed and analyzed the current status of school library collections, the data registration of the school library support system DLS, the subject accessibility of catalog records produced through this, and the recognition and opinions of school library professionals. As a result, school library collections were highly concentrated in the literature field, and it was found that there was not enough catalog bibliographic records to provide efficient access to these collections. In addition, it was found to be somewhat lacking through the DLS search function to compensate for this. Surveys of school librarians and librarians have also identified this problem, and a rich topic index and search keyword assignments have been drawn to the majority of opinions as a way to improve access to materials in school library catalogs. As a continuous discussion on this subject, the plan for improving access to school library materials will be more concrete through future user studies and new challenges for bookshelf classification.

A Study on User's Perception Survey for Establishment of Regional Base Library: Centered on Gwangju Metropolitan Library (지역 거점도서관 건립을 위한 이용자 인식조사 연구 - 광주광역시 하남도서관을 대상으로 -)

  • Sang Woo Han;Woo Kwon Chang
    • Journal of Korean Library and Information Science Society
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    • v.53 no.4
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    • pp.267-292
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    • 2022
  • This study is a basic study to establish a comprehensive plan for operating the Hanam Library, a regional base library that will be built in Gwangsan-gu, Gwangju Metropolitan City. We investigated opinions about the collection, library program, role and task of a regional base library and the operation of the cooperative shared storage. As a result of the study, the information resources that users prefer are a book form of the literary subject, and preferred library services are the use of information resources and participation in cultural events. Public library librarians answered conducting user-centered services and carrying out a cooperative projects between libraries are important and they recognized cooperative acquisition as a task should be performed first. In addition, opinions about the operation of cooperative shared storage is generally positive. The regional base library managers said that it is important to establish library governance by clarifying the status and role of the library and that as a public library, and to promote information services and cooperation projects for local users. The results of this study can be expected to be the useful basic material for the establishment of the Hanam Library comprehensive operation plan.

Recommender system using BERT sentiment analysis (BERT 기반 감성분석을 이용한 추천시스템)

  • Park, Ho-yeon;Kim, Kyoung-jae
    • Journal of Intelligence and Information Systems
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    • v.27 no.2
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    • pp.1-15
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    • 2021
  • If it is difficult for us to make decisions, we ask for advice from friends or people around us. When we decide to buy products online, we read anonymous reviews and buy them. With the advent of the Data-driven era, IT technology's development is spilling out many data from individuals to objects. Companies or individuals have accumulated, processed, and analyzed such a large amount of data that they can now make decisions or execute directly using data that used to depend on experts. Nowadays, the recommender system plays a vital role in determining the user's preferences to purchase goods and uses a recommender system to induce clicks on web services (Facebook, Amazon, Netflix, Youtube). For example, Youtube's recommender system, which is used by 1 billion people worldwide every month, includes videos that users like, "like" and videos they watched. Recommended system research is deeply linked to practical business. Therefore, many researchers are interested in building better solutions. Recommender systems use the information obtained from their users to generate recommendations because the development of the provided recommender systems requires information on items that are likely to be preferred by the user. We began to trust patterns and rules derived from data rather than empirical intuition through the recommender systems. The capacity and development of data have led machine learning to develop deep learning. However, such recommender systems are not all solutions. Proceeding with the recommender systems, there should be no scarcity in all data and a sufficient amount. Also, it requires detailed information about the individual. The recommender systems work correctly when these conditions operate. The recommender systems become a complex problem for both consumers and sellers when the interaction log is insufficient. Because the seller's perspective needs to make recommendations at a personal level to the consumer and receive appropriate recommendations with reliable data from the consumer's perspective. In this paper, to improve the accuracy problem for "appropriate recommendation" to consumers, the recommender systems are proposed in combination with context-based deep learning. This research is to combine user-based data to create hybrid Recommender Systems. The hybrid approach developed is not a collaborative type of Recommender Systems, but a collaborative extension that integrates user data with deep learning. Customer review data were used for the data set. Consumers buy products in online shopping malls and then evaluate product reviews. Rating reviews are based on reviews from buyers who have already purchased, giving users confidence before purchasing the product. However, the recommendation system mainly uses scores or ratings rather than reviews to suggest items purchased by many users. In fact, consumer reviews include product opinions and user sentiment that will be spent on evaluation. By incorporating these parts into the study, this paper aims to improve the recommendation system. This study is an algorithm used when individuals have difficulty in selecting an item. Consumer reviews and record patterns made it possible to rely on recommendations appropriately. The algorithm implements a recommendation system through collaborative filtering. This study's predictive accuracy is measured by Root Mean Squared Error (RMSE) and Mean Absolute Error (MAE). Netflix is strategically using the referral system in its programs through competitions that reduce RMSE every year, making fair use of predictive accuracy. Research on hybrid recommender systems combining the NLP approach for personalization recommender systems, deep learning base, etc. has been increasing. Among NLP studies, sentiment analysis began to take shape in the mid-2000s as user review data increased. Sentiment analysis is a text classification task based on machine learning. The machine learning-based sentiment analysis has a disadvantage in that it is difficult to identify the review's information expression because it is challenging to consider the text's characteristics. In this study, we propose a deep learning recommender system that utilizes BERT's sentiment analysis by minimizing the disadvantages of machine learning. This study offers a deep learning recommender system that uses BERT's sentiment analysis by reducing the disadvantages of machine learning. The comparison model was performed through a recommender system based on Naive-CF(collaborative filtering), SVD(singular value decomposition)-CF, MF(matrix factorization)-CF, BPR-MF(Bayesian personalized ranking matrix factorization)-CF, LSTM, CNN-LSTM, GRU(Gated Recurrent Units). As a result of the experiment, the recommender system based on BERT was the best.

Design Characteristics of Nursing Home Environment Created by Care Professional Based on Practical Experience (케어전문가의 실천적 경험에 입각한 노인요양시설 환경디자인 노력특성연구)

  • Lee, Yeun-Sook;Yoon, Hye-Gyung;Park, Eun-Ji
    • Journal of the Korean housing association
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    • v.22 no.5
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    • pp.21-28
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    • 2011
  • This thesis aims to identify the design guidelines for environmental plans for the facilities for the aged people with a focus on the users' needs and the concept of aging in place. For this purpose major environmental design factors were researched by analyzing spaces and interviewing the managers and supervisor of W nursing home in Jeju Island that was opened in 1980s. Surveyed factors were divided into five categories, and by applying the design guideline theory of age friendly environment and nursing home facilities to them, five municipal composition factors of Kevin Lynch, universal design, environmental behavior model of John Zeisel principles were found. On the other hand, the environmental changes and development process of W nursing home is a showcase that reveals the importance of narrowing the gap in the opinions of the space users, the experts of architecture and administration which is emphasized in the principles of Inquiry by Design of John Zeisel. This research is expected to be used effectively for the researchers who study the space designs for the age-friendly environment.

A Study on College Students' Use of Library Blogs: Focus on D Academic Library (대학생의 도서관 블로그 사용에 관한 연구 - D 대학교 도서관을 중심으로 -)

  • Lee, Lan-Ju
    • Journal of the Korean BIBLIA Society for library and Information Science
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    • v.25 no.1
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    • pp.319-342
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    • 2014
  • This study investigates the evaluations, preferences, and opinions of students' experiences with their academic library blog and to identify student suggestions on how to improve the utilization such blogs. For this study, the D academic library blog was selected for study, while employing survey and focus group research methods. The results include the students' subjective evaluations of the library blog's operations, suggestions on how to improve the operation, and how to stimulate the utilization of the blog. This study may provide insights on how to improve academic library blog operations with access, updates, content, and marketing strategies.

Designing a Mobile Based Library Information and Service Delivery System: A Model Plan for Libraries of Bangladesh

  • Elahi, Md. Hasinul
    • Journal of Information Science Theory and Practice
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    • v.4 no.3
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    • pp.57-70
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    • 2016
  • Purpose The purpose of the study is to identify the need of a mobile based library information and service delivery system in developing countries, identify the services that are possible to provide with the help of mobile phones and their applications, design a mobile based library information and service delivery system, and identify major challenges regarding mobile based library information and service delivery systems.Design/ Methodology/ Approach The research is exploratory in nature. This paper is based on a review of literature, survey information, and on the author’s own viewpoints. A comprehensive search of scientific literature has been done along with a survey for validating the necessity of designing mobile based library information and service delivery systems. Responses to closed-ended questions in particular on 7-point Likert scales were analyzed using the descriptive analysis techniques of SPSS 20.0 and responses to other closed-ended questions were analyzed using general statistics.Findings The research indicates that users of academic libraries, especially students and faculty members, have a positive notion regarding designing and implementing a mobile based library information and service delivery system. It also reveals user opinions regarding the possible problems associated with the design and implementation of a mobile based library information and service delivery system.Originality The paper explores mobile based library information and service delivery systems for better and faster service provision to its potential users.