• Title/Summary/Keyword: Digital University

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Accuracy of three-dimensional periodontal ligament models generated using cone-beam computed tomography at different resolutions for the assessment of periodontal bone loss

  • Hangmiao Lyu;Li Xu;Huimin Ma;Jianxia Hou;Xiaoxia Wang;Yong Wang;Yijiao Zhao;Weiran Li;Xiaotong Li
    • The korean journal of orthodontics
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    • v.53 no.2
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    • pp.77-88
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    • 2023
  • Objective: To develop a method for generating three-dimensional (3D) digital models of the periodontal ligament (PDL) using 3D cone-beam computed tomography (CBCT) reconstruction and to evaluate the accuracy and agreement of the 3D PDL models in the measurement of periodontal bone loss. Methods: CBCT data collected from four patients with skeletal Class III malocclusion prior to periodontal surgery were reconstructed at three voxel sizes (0.2 mm, 0.25 mm, and 0.3 mm), and 3D tooth and alveolar bone models were generated to obtain digital PDL models for the maxillary and mandibular anterior teeth. Linear measurements of the alveolar bone crest obtained during periodontal surgery were compared with the digital measurements for assessment of the accuracy of the digital models. The agreement and reliability of the digital PDL models were analyzed using intra- and interexaminer correlation coefficients and Bland-Altman plots. Results: Digital models of the maxillary and mandibular anterior teeth, PDL, and alveolar bone of the four patients were successfully established. Relative to the intraoperative measurements, linear measurements obtained from the 3D digital models were accurate, and there were no significant differences among different voxel sizes at different sites. High diagnostic coincidence rates were found for the maxillary anterior teeth. The digital models showed high intra- and interexaminer agreement. Conclusions: Digital PDL models generated by 3D CBCT reconstruction can provide accurate and useful information regarding the alveolar crest morphology and facilitate reproducible measurements. This could assist clinicians in the evaluation of periodontal prognosis and establishment of an appropriate orthodontic treatment plan.

DIGITAL HOMOLOGY GROUPS OF DIGITAL WEDGE SUMS

  • Kang, Jeang Min;Han, Sang-Eon
    • Honam Mathematical Journal
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    • v.38 no.4
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    • pp.819-831
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    • 2016
  • The present paper investigates some properties of the digital homology in [1, 4, 5] and points out some unclearness of the definition of a digital homology and further, suggests a suitable form of a digital homology. Finally, we calculate a digital homology group and a relative digital homology group of some digital wedge sums. Finally, the paper corrects some errors in [6]. In the present paper all digital images (X, k) are assumed to be non-empty and k-connected.

Effect of Digital Selling Readiness on Salespeople's Customer-Oriented Behavior Through Digital Literacy and Self-Efficacy

  • Hyunseung NA;Hangeun LEE;Chankoo YEO
    • Journal of Distribution Science
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    • v.22 no.2
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    • pp.95-102
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    • 2024
  • Purpose: This study systematically examined the concept of digital selling readiness of salespeople. Additionally, this study empirically confirms the sequential mediating roles of digital literacy and salesperson self-efficacy in the impact of digital selling readiness on customer-oriented behavior. Research design, data, and methodology: We collected data from salespeople at a Bank and Financial Service firm in South Korea. A total of 254 salespeople were invited to participate, with 154 surveys returned. After removing the questionnaires with missing values, 150 complete surveys were employed for the analysis. Results: The empirical analysis indicates that digital selling readiness positively affects digital literacy. Digital literacy, in turn, is positively associated with self-efficacy, leading to increased customer-oriented behaviors among salespersons. This study also confirms the sequential mediating effects of digital literacy and self-efficacy in the impact of salespeople's digital selling readiness on customer-oriented behavior. Conclusions: Our research deepens the understanding of how digital selling readiness fosters customer-oriented behavior through the sequential mediating effects of digital literacy and self-efficacy. This study extends the previous model by sequentially involving digital literacy and self-efficacy to better understand the psychological processes of digital selling. The results highlight the role of digital selling readiness in preparing salespeople for digital sales.

Exploratory Autopsy on Digital Payment Models

  • Wang, Tao;Kim, Chang-Su;Kim, Ki-Su
    • 한국경영정보학회:학술대회논문집
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    • 2007.06a
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    • pp.646-651
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    • 2007
  • Secure digital payment is critical in the successful shaping of global digital business. Digital payments are increasingly being used as a substitute to traditional payments, contributing markedly to the efficiency of the economy. The focus of every digital business transaction is to minimize risks arising from transactions. It is essential to ensure the security of digital payment whether used in internal networks or over wireless Internet. This paper analyses secure digital payment methods from the viewpoint of systemic security and transaction security. According to comparative analysis of digital payment models, this paper proposes a comparative analysis framework to investigate and evaluate secure digital payment. In conclusion, the comparative analysis framework, comparison of digital payment models and mobile payment models proposes a useful academic and practical foundation to enhance the understanding of secure digital payment methods. It also provides academic background and practical guidelines for the development of secure digital payment systems.

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The Mediating Role of Self-Regulation Between Digital Literacy and Learning Outcomes in the Digital Textbook for Middle School English

  • LEE, Jeongmin;MOON, Jiyoon;CHO, Boram
    • Educational Technology International
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    • v.16 no.1
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    • pp.58-83
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    • 2015
  • Digital textbooks draw attention as a new format of educational material, using the advantages of information technology; this innovative learning tool requires consideration as a part of successful and effective learning. The main purpose of the article is to investigate the mediating role of self-regulation between digital literacy and learning outcomes (academic performance and learning motivation) when using digital textbooks as a learning tool in Middle School English. Both descriptive and regression analysis were used as data analyses methods. The main findings of this study were as follows: first, digital literacy and self-regulation significantly predicted academic performance and learning motivation; second, self-regulation fully mediated between digital literacy and academic performance; third, self-regulation partially mediated between digital literacy and learning motivation. The research results proved the effects of digital literacy and self-regulation on the learning outcomes and mediating role of self-regulation between digital literacy and learning outcomes. These results help to design and implement effective lessons when using a digital textbook in Middle school English.

A Study on Contents Manufactur ing System for Massive Contents Production

  • Ji, Su-Mi;Lee, Jeong-Joong;Kwon, Sang-Pill;Kim, Jin-Guk;Yu, Chang-Man;Lee, Jeong-Gyu;Jeon, Se-Jong;Jeong, Tae-Wan;Kang, Dong-Wann;Park, Sang-Il;Song, Oh-Young;Lee, Jong-Weon;Yoon, Kyung-Hyun;Han, Chang-Wan;Baik, Sung-Wook
    • Journal of Korea Multimedia Society
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    • v.13 no.12
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    • pp.1832-1842
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    • 2010
  • This paper introduces a new automatic processing system: "Contents Factory" for the mass production of contents. Through the contents factory, we provide an authoring environment to improve the usability and the efficiency in producing contents. The contents factory integrates recycling techniques for contents resources, contents development engines, authoring tools, and interfaces into a total processing system. Since it is multi-platform based including mobile devices as well as PCs, one can easily produce complete PC and mobile contents from raw resources. We produced an example, "Sejong square" via the contents factory in order to demonstrate its effectiveness and usability.

CERTAIN TOPOLOGICAL METHODS FOR COMPUTING DIGITAL TOPOLOGICAL COMPLEXITY

  • Melih Is;Ismet Karaca
    • Korean Journal of Mathematics
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    • v.31 no.1
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    • pp.1-16
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    • 2023
  • In this paper, we examine the relations of two closely related concepts, the digital Lusternik-Schnirelmann category and the digital higher topological complexity, with each other in digital images. For some certain digital images, we introduce κ-topological groups in the digital topological manner for having stronger ideas about the digital higher topological complexity. Our aim is to improve the understanding of the digital higher topological complexity. We present examples and counterexamples for κ-topological groups.

Digital Management System in a Business Environment

  • Veresklia, Mariana;Mykhalitska, Nataliia;Trut, Olha;Honchar, Svitlana;Larin, Stanislav
    • International Journal of Computer Science & Network Security
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    • v.22 no.9
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    • pp.217-223
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    • 2022
  • In modern business conditions, the improvement of business processes cannot do without digitalization. Digital technologies allow businesses to conquer markets, quickly introduce new technologies not only into production processes, but also at all levels of economic activity. The rapid pace of development of information, communication and economic spheres determine the relevance of the research topic and the goals that digital management solves. Today, the use of digital equipment and platforms makes it possible to form the basis for the formation of competitive business advantages, minimize costs, and most importantly, respond in time to changes in both the internal and external environment..Thus, the main task of the study is to analyze the digital management system in a business environment. As a result of the study, current trends and prerequisites for digital management system in a business environment were investigated.

Study and Practice on New Generation Digital-City Oriented 3D Digital Map

  • He, Xiaozhao;Li, Qi;Cheng, Jicheng
    • Proceedings of the KSRS Conference
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    • 2003.11a
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    • pp.914-916
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    • 2003
  • Most current 3D digital maps are 2.5 dimension models based on DEM, which can only be recognized, browsed and operated by a special software, far from meeting the needs of a modern digital city (global) with the distributed, isomerous and multiple application on the real 3D representation and open sharing models. In this paper, a new generation digital city oriented 3D digital map is studied. Firstly, a real 3D digital map representation is presented. And then, some key techniques and methods for browser-based 3D digital map’s representation, display and operation are introduced, which can realized the open sharing of 3D map in distributed, isomerous and multiple application environment. Furthermore, the scale driving technique of proposed 3D digital map is also studied. And currently, some developments based on some of the above methods are being carried to provide key and general platform for other application software’s development.

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