Computer Sciences Commons^™

Thai Scene Text Recognition, Thananop Kobchaisawat

Chulalongkorn University Theses and Dissertations (Chula ETD)

Automatic scene text detection and recognition can benefit a large number of daily life applications such as reading signs and labels, and helping visually impaired persons. Reading scene text images becomes more challenging than reading scanned documents in many aspects due to many factors such as variations of font styles and unpredictable lighting conditions. The problem can be decomposed into two sub-problems: text localization and text recognition. The proposed scene text localization works at the pixel level combined with a new text representation and a fully-convolutional neural network. This method is capable of detecting arbitrary shape texts without language limitations. …

Path Exploration With Random Network Distillation On Multi-Agent Reinforcement Learning, Korawat Charoenpitaks

Chulalongkorn University Theses and Dissertations (Chula ETD)

Intrinsic motivation is one of the potential candidates to help improve performance of reinforcement learning algorithm in complex environments. The method enhances exploration capability without explicitly told by the creator and works on any environment. This is suitable in the case of multi-agent reinforcement learning where the environment complexity is more than usual. The research presents an exploration model using intrinsic motivation built from the random network distillation algorithm to improve the performance of multi-agent reinforcement learning and compare with the benchmark in different scenarios. The concept of clipping ratio is introduced to enforces the limit on optimization magnitude. Based …

Citation Network Analysis For Journal Selection Of University Library, Nopanan Pongitthidej

Chulalongkorn University Theses and Dissertations (Chula ETD)

Every academic year, a university library must subscribe tons of journals to provide the best resource for the students and researchers. However, subscribed journals have been used unequally and some relevant journals are not subscribed. Therefore, the library needs supporting information about usedness and demand of journals for efficient collection management. In this paper, citation network analysis is applied to analyze the articles published by university researchers and their references. The result is two overlapping lists of journals that are recommended for the library collection i.e. (a) journals that the university researchers have published in and (b) journals that the …

โครงการอิมพลีเมนท์ เอสเอพี อีซีซี 6.0 : โมดูลการบริหารจัดการวัตถุดิบของธุรกิจจัดจำหน่ายข้าวสาร, ณัฐญา เจริญสุข

Chulalongkorn University Theses and Dissertations (Chula ETD)

โครงการอิมพลีเมนท์ เอสเอพี อีซีซี 6.0: โมดูลการจัดการวัตถุดิบสำหรับธุรกิจจัดจำหน่ายข้าวสาร พัฒนาขึ้นโดยมีจุดประสงค์เพื่อกำหนดค่าการทำงานของซอฟต์แวร์วางแผนจัดการทรัพยากรขององค์กรให้ตรงกับความต้องการและสอดคล้องกับกระบวนการทางธุรกิจของบริษัทจัดจำหน่ายข้าวสารที่นำมาเป็นกรณีศึกษา เพื่อให้บริษัทมีระบบสารสนเทศแบบบูรณาการในการดำเนินงานร่วมกันในส่วนงานที่เกี่ยวข้อง มีการใช้ข้อมูลร่วมกันภายในบริษัท และสนับสนุนการออกรายงานสำหรับผู้บริหารเพื่อใช้ในการวิเคราะห์ ตัดสินใจ และวางแผนการดำเนินงานอย่างมีประสิทธิภาพ โครงการอิมพลีเมนท์ เอสเอพี อีซีซี 6.0: โมดูลการจัดการวัตถุดิบสำหรับธุรกิจจัดจำหน่ายข้าวสาร ประกอบด้วย 5 ระบบย่อย ได้แก่ ระบบจัดการข้อมูลหลักวัตถุดิบ ระบบจัดซื้อ ระบบการจัดการสินค้าคงคลัง ระบบการรับรู้หนี้การค้า และระบบสารสนเทศเพื่อการจัดการ โครงการนี้พัฒนาขึ้นโดยใช้ซอฟต์แวร์สำเร็จรูป SAP ECC 6.0 ระบบจัดการฐานข้อมูล Oracle 11g และระบบปฏิบัติการ Microsoft Windows Server 2008 R2

คลังข้อมูล ธุรกิจอัจฉริยะ และการวิเคราะห์ข้อมูลขั้นสูงของธุรกิจสินเชื่อเช่าซื้อรถยนต์, สาริศา สาธินสิริ

Chulalongkorn University Theses and Dissertations (Chula ETD)

ธุรกิจสินเชื่อรถยนต์ในประเทศไทยได้ขยายตัวอย่างต่อเนื่อง อันเป็นผลมาจากจำนวนความต้องการใช้รถยนต์ที่เพิ่มสูงขึ้น จึงส่งผลให้ธุรกิจสินเชื่อรถยนต์เกิดการขยายตัวอย่างต่อเนื่องเพื่อตอบรับความต้องการของตลาด และเพื่อให้สามารถดำเนินการให้บริการปล่อยสินเชื่อเงินกู้เพื่อการซื้อรถยนต์ได้ภายใต้สภาวะการแข่งขันที่สูง ผู้ให้บริการสินเชื่อจึงต้องปรับตัวให้ทันกับสถานการณ์และสภาวะการแข่งขันที่สูงนี้ ดังนั้นการนำระบบสารสนเทศเข้ามาใช้เป็นเครื่องมือสนับสนุนการวิเคราะห์ด้านข้อมูลสินเชื่อผลิตภัณฑ์และพฤติกรรมของลูกค้าจะช่วยให้สามารถเพิ่มขีดความสามารถในการแข่งขัน จัดการกับความเสี่ยง และกำหนดกลยุทธ์ขององค์กรได้ โครงการ “คลังข้อมูล ธุรกิจอัจฉริยะ และการวิเคราะห์ข้อมูลขั้นสูงของธุรกิจสินเชื่อเช่าซื้อรถยนต์” โดยประกอบด้วย 5 ระบบ ได้แก่ ระบบวิเคราะห์รายได้ ระบบวิเคราะห์ลูกค้า ระบบวิเคราะห์หนี้ระบบวิเคราะห์รถยนต์ และระบบการให้คะแนนสินเชื่อ โดยได้พัฒนาขึ้นบนระบบการจัดการฐานข้อมูล Microsoft SQL Server 2017 และใช้เครื่องมือต่างๆ ของชุดโปรแกรม Power BI Desktop 2019 ระบบสารสนเทศที่พัฒนาขึ้นนี้จะช่วยให้ผู้บริหารสามารถวิเคราะห์ข้อมูลในมุมมองต่างๆ ได้อย่างถูกต้องและรวดเร็ว เพื่อนำไปใช้ตัดสินใจในการดำเนินกลยุทธ์ที่จะสามารถเอาชนะความท้าทายในธุรกิจการปล่อยสินเชื่อเช่าซื้อรถยนต์ได้อย่างมีประสิทธิภาพ และสร้างความได้เปรียบในการแข่งขันให้กับบริษัทต่อไป

Explainable Neural Networks Based Anomaly Detection For Cyber-Physical Systems, Kasun Amarasinghe

Theses and Dissertations

Cyber-Physical Systems (CPSs) are the core of modern critical infrastructure (e.g. power-grids) and securing them is of paramount importance. Anomaly detection in data is crucial for CPS security. While Artificial Neural Networks (ANNs) are strong candidates for the task, they are seldom deployed in safety-critical domains due to the perception that ANNs are black-boxes. Therefore, to leverage ANNs in CPSs, cracking open the black box through explanation is essential.

The main objective of this dissertation is developing explainable ANN-based Anomaly Detection Systems for Cyber-Physical Systems (CP-ADS). The main objective was broken down into three sub-objectives: 1) Identifying key-requirements that an …

Research On The Law Of Garlic Price Based On Big Data, Feng Guo, Pingzeng Liu, Chao Zhang, Weijie Chen, Wei Han, Wanming Ren, Yong Zheng, Jianrui Ding

Computer Science Student Research

In view of the frequent fluctuation of garlic price under the market economy and the current situation of garlic price, the fluctuation of garlic price in the circulation link of garlic industry chain is analyzed, and the application mode of multidisciplinary in the agricultural industry is discussed. On the basis of the big data platform of garlic industry chain, this paper constructs a Garch model to analyze the fluctuation law of garlic price in the circulation link and provides the garlic industry service from the angle of price fluctuation combined with the economic analysis. The research shows that the average …

Development And Application Of Big Data Platform For Garlic Industry Chain, Weijie Chen, Guo Feng, Chao Zhang, Pingzeng Liu, Wanming Ren, Ning Cao, Jianrui Ding

Computer Science Student Research

In order to effectively solve the problems which affect the stable and healthy development of garlic industry, such as the uncertainty of the planting scale and production data, the influence factors of price fluctuation is difficult to be accurately analyzed, the difficult to predict the trend of price change, the uncertainty of the market concentration, and the difficulty of the short-term price prediction etc. the big data platform of the garlic industry chain has been developed. Combined with a variety of data acquisition technology, the information collection of influencing factors for garlic industry chain is realized. Based on the construction …

From The Editors, Herbert J. Mattord, Michael E. Whitman

Journal of Cybersecurity Education, Research and Practice

A message from the editors.

Investigating The Impact Of Publicly Announced Information Security Breaches On Corporate Risk Factor Disclosure Tendencies, Sandra J. Cereola, Joanna Dynowska

Journal of Cybersecurity Education, Research and Practice

As the reported number of data breaches increase and senators push for more disclosure regulation, the SEC staff issued a guidance in 2011 on disclosure obligations relating to cybersecurity risks and incidents. More recently, on February 26, 2018 the SEC Commission issued interpretive guidance to help assist public companies prepare disclosures regarding cybersecurity risks and incidents. As reported incidents of cybersecurity breaches occur, investors are concerned about the risks associated with these incidents and the impact they may have on financial performance. Although the SEC staff guidance warns public companies to make timely disclosure, recognizing the threat that cybercrime poses …

Sit Back, Relax, And Tell Me All Your Secrets, Sarah Kirk, Daniel Foreman, Cody Lee, Shannon W. Beasley

Journal of Cybersecurity Education, Research and Practice

The goal of this research is to describe an active learning opportunity that was conducted as a community service offering through our Center for Cybersecurity Education and Applied Research (CCEAR). As a secondary goal, the participants sought to gain real world experience by applying techniques and concepts studied in security classes. A local insurance company tasked the CCEAR with assembling a team of students to conduct penetration testing (including social engineering exploits) against company personnel. The endeavor allowed the insurance company to obtain information that would assess the effectiveness of employee training with regard to preventing the divulgence of sensitive …

Classically Biased: A Quantitative Analysis Of Gender & Writing Styles In Classical Literature, Madeleine Rose Delcambre

Honors Theses

This thesis is a first attempt in assessing patterns related to gender in classical literature prior to the 21st century, specifically looking at the way writing styles and language di↵er among female and male authors; e.g., sentence structuring, lexical diversity, and dictionary similarities. Further topics of analysis included gender distribution and sentiment within the novels themselves. Seventy-eight open-source novels were used in the analysis, with thirty-one books by female authors and forty-seven by male authors. Data from the novels was acquired using Python, natural language processing, and the Natural Language Toolkit (NLTK). Graphs and visuals were then created to summarize …

Exploratory Factor Analysis Of Graphical Features For Link Prediction In Social Networks, Lale Madahali, Lotfi Najjar, Margeret Hall

Interdisciplinary Informatics Faculty Proceedings & Presentations

Social Networks attract much attention due to their ability to replicate social interactions at scale. Link prediction, or the assessment of which unconnected nodes are likely to connect in the future, is an interesting but non-trivial research area. Three approaches exist to deal with the link prediction problem: feature-based models, Bayesian probabilistic models, probabilistic relational models. In feature-based methods, graphical features are extracted and used for classification. Usually, these features are subdivided into three feature groups based on their formula. Some formulas are extracted based on neighborhood graph traverse. Accordingly, there exists three groups of features, neighborhood features, path-based features, …

An Interactive Game For Cultural Proficiencytraining Featuring Virtual Reality Immersion, Paul J. Hershberger, Blaine A. Klingler, Matt Davis, Sankalp Mishra, Miteshkumar Vasoya, Dixit Patel, Aishwarya Bositty, Tanuja Addanki, Frank A. Allen, Suneesh Menon, Sabrina Neeley, Angie Castle, Todd Pavlak, Yong Pei, Thomas Wischgoll

Computer Science and Engineering Faculty Publications

No abstract provided.

Enabling Space Time Division Multiple Access In Ietf 6tisch Protocol, Sedat Görmüş, Sercan Külcü

Turkish Journal of Electrical Engineering and Computer Sciences

IETF 6TiSCH standard aims to create reliable, deterministic, and low-power networks by scheduling bandwidth resources in time and frequency domains. The main emphasis of 6TiSCH protocol is that it creates Internet of things (IoT) networks with a deterministic and controllable delay. However, many of its benefits are tied to the ability of the 6TiSCH scheduler to optimally distribute radio resources among wireless nodes which may not be possible when the number of frequency resources are limited and several other wireless technologies share the same frequency band (e.g., WiFi, Bluetooth and IEEE 802.15.4). Here the integration of a low-complexity directional antenna …

Stegogis: A New Steganography Method Using The Geospatial Domain, Ömer Kurtuldu, Mehmet Demi̇rci̇

Turkish Journal of Electrical Engineering and Computer Sciences

Geographic data are used on a variety of computing devices for many different applications including navigation, tracking, location planning, and marketing. The prevalence of geographic data makes it possible to envision new useful applications. In this paper, we propose using geographic data as a medium for secret communication, or steganography. We develop a method called StegoGIS for hiding messages in geographic coordinates in the well-known binary of fast-moving objects and transmitting them secretly. We show that discovering this secret communication is practically impossible for third parties. We also show that a large amount of secret data can be transmitted this …

Improving Undersampling-Based Ensemble With Rotation Forest For Imbalanced Problem, Huaping Guo, Xiaoyu Diao, Hongbing Liu

Turkish Journal of Electrical Engineering and Computer Sciences

As one of the most challenging and attractive issues in pattern recognition and machine learning, the imbalanced problem has attracted increasing attention. For two-class data, imbalanced data are characterized by the size of one class (majority class) being much larger than that of the other class (minority class), which makes the constructed models focus more on the majority class and ignore or even misclassify the examples of the minority class. The undersampling-based ensemble, which learns individual classifiers from undersampled balanced data, is an effective method to cope with the class-imbalance data. The problem in this method is that the size …

Cybersecurity Policy Development At The State Level: A Case Study Of Middle Tennessee, Daniel Leslie Scherr

Walden Dissertations and Doctoral Studies

Cybersecurity is a growing threat not only to nations, critical infrastructure, and major entities, but also to smaller organizations and individuals. The growing number of successful attacks on all manner of U.S. targets highlights the need for effective and comprehensive policy from the local to federal level, though most research focuses on federal policy issues, not state issues. The purpose of this study was to examine the effectiveness of the decision-making process within the current cybersecurity policy environment in a southern state of the United States. Sabatier's advocacy coalition framework served as the theoretical framework for the study. Data were …

Examination Of Adoption Theory On The Devops Practice Of Continuous Delivery, Andrew John Anderson

Walden Dissertations and Doctoral Studies

Many organizations have difficulty adopting advanced software development practices. Some software development project managers in large organizations are not aligned with the relationship between performance expectancy, effort expectancy, social influence, and facilitating conditions, as moderated by experience, with intent to adopt the DevOps practice of continuous delivery. The purpose of this study was to examine the statistical relationships between the independent variables—performance expectancy, effort expectancy, social influence, and facilitating conditions, as moderated by experience—and the dependent variable of behavioral intent to adopt a continuous delivery system. Venkatesh, Morris, Davis, and Davis's unified theory of acceptance and use of technology provided …

Leadership Characteristics In Flexible Information Technology Environments, Chrisilia Bristow

Walden Dissertations and Doctoral Studies

Researchers have found that a positive correlation exists between information technology (IT) flexibility, IT effectiveness, and strategic alignment in organizations. It has been determined that within inflexible IT environments maintainability is reduced and key business factors become at risk. An IT flexibility measurement matrix was developed to assess IT flexibility however leadership characteristics were not identified for measurement with that model. Determining the leadership characteristics needed for IT flexibility was the purpose of this multiple case study. Leveraging the empowerment, situational leadership, IT-business equilibrium, and complexity change theories, the research questions were focused on the leadership characteristics exhibited by organizational …

Exploring Strategies To Integrate Disparate Bioinformatics Datasets, Charbel Bader Fakhry

Walden Dissertations and Doctoral Studies

Distinct bioinformatics datasets make it challenging for bioinformatics specialists to locate the required datasets and unify their format for result extraction. The purpose of this single case study was to explore strategies to integrate distinct bioinformatics datasets. The technology acceptance model was used as the conceptual framework to understand the perceived usefulness and ease of use of integrating bioinformatics datasets. The population of this study included bioinformatics specialists of a research institution in Lebanon that has strategies to integrate distinct bioinformatics datasets. The data collection process included interviews with 6 bioinformatics specialists and reviewing 27 organizational documents relating to integrating …

Strategies To Reduce The Fiscal Impact Of Cyberattacks, Shirley Denise Smith

Walden Dissertations and Doctoral Studies

A single cyberattack event involving 1 major corporation can cause severe business and social devastation. In this single case study, a major U.S. airline company was selected for exploration of the strategies information technology administrators and airline managers implemented to reduce the financial devastation that may be caused by a cyberattack. Seven participants, of whom 4 were airline managers and 3 were IT administrators, whose primary responsibility included implementation of strategies to plan for and respond to cyberattacks participated in the data collection process. This study was grounded on the general systems theory. Data collection entailed semistructured face-to-face and telephone …

Relationship Between Perceived Usefulness, Ease Of Use, And Acceptance Of Business Intelligence Systems, Christina Ndiwa Sandema-Sombe

Walden Dissertations and Doctoral Studies

In retail, the explosion of data sources and data has provided incentive to invest in information systems (IS), which enable leaders to understand the market and make timely decisions to improve performance. Given that users’ perceptions of IS affects their use of IS, understanding the factors influencing user acceptance is critical to acquiring an effective business intelligence system (BIS) for an organization. Grounded in the technology acceptance model theory, the purpose of this correlational study was to examine the relationship between perceived usefulness (PU), perceived ease of use (PEOU), and user acceptance of business intelligence systems (BIS) in retail organizations. …

Analyzing Small Businesses' Adoption Of Big Data Security Analytics, Henry Mathias

Walden Dissertations and Doctoral Studies

Despite the increased cost of data breaches due to advanced, persistent threats from malicious sources, the adoption of big data security analytics among U.S. small businesses has been slow. Anchored in a diffusion of innovation theory, the purpose of this correlational study was to examine ways to increase the adoption of big data security analytics among small businesses in the United States by examining the relationship between small business leaders' perceptions of big data security analytics and their adoption. The research questions were developed to determine how to increase the adoption of big data security analytics, which can be measured …

Knowledge Transfer Strategy Implementation In Contract Organizations, Delano Clyde Hudson

Walden Dissertations and Doctoral Studies

Despite economic perils of government shutdowns, foreclosures, bankruptcies, and employee layoffs, some contract leaders consistently fail to implement knowledge transfer strategies that could improve production and profitability and maintain operational readiness when employees transition in and out of the organization. The conceptual framework for this descriptive research study was Nonaka and Takeuchi's socialization, externalization, combination, and internalization model for knowledge creation. A purposive sample of 20 leaders from 2 contract organizations within the south central United States with at least 10 years of experience in contracting were interviewed. Member checking was used for reliability of the synthesized interviews, and triangulation …

Reducing Errors With Blood Administration Transfusion Systems, Kim D. Stevens

Walden Dissertations and Doctoral Studies

The intention of implementing technology into healthcare practices is to reduce opportunity for errors in the delivery of providing health care. However, errors still occur, and many times are preventable. Configurations of health information technology systems should match clinical workflows to promote usage as intended. The purpose of this quality improvement project was to evaluate the impact of revised system configurations and use of a blood product transfusion system for the administration of blood products after one year of implementation. The method of heuristic evaluation is a usability engineering method for finding problems in a user interface design with the …

Incorporating Data Governance Frameworks In The Financial Industry, Tarlochan Singh Randhawa

Walden Dissertations and Doctoral Studies

Data governance frameworks are critical to reducing operational costs and risks in the financial industry. Corporate data managers face challenges when implementing data governance frameworks. The purpose of this multiple case study was to explore the strategies that successful corporate data managers in some banks in the United States used to implement data governance frameworks to reduce operational costs and risks. The participants were 7 corporate data managers from 3 banks in North Carolina and New York. Servant leadership theory provided the conceptual framework for the study. Methodological triangulation involved assessment of nonconfidential bank documentation on the data governance framework, …

Strategies For Using Information And Communication Technologies To Improve Profitability, Rodney Mciver

Walden Dissertations and Doctoral Studies

Small business owners in a range of industries continually adapt to take advantage of technological developments in accounting, marketing, and communication. The purpose of this multiple case study was to explore strategies that small business owners operating in the central region of North Carolina used to implement information and communication technology (ICT). Roger's diffusion of innovation theory grounded the study. Data collection included face-to-face semistructured interviews with 6 owners of small businesses who successfully implemented ICT, field notes from site observations, and reviews of participant websites. Interviews were transcribed and participants were engaged in member checking. Data were analyzed using …

Development Of A Sensing System For Underground Optic Fiber Cable Conduit Mapping, Sherif Bakr

All Graduate Theses, Dissertations, and Other Capstone Projects

The motivation of this research is to obtain an accurate three-dimensional (3D) layout of an underground conduit, which may be beneficial to optic fiber cable installers and engineers. A newly designed algorithm for 3D position tracking with the help of an inertial sensor and an encoder has been developed. Two types of representations (Euler angle and Quaternion) for orientation and rotation are also introduced, followed by several data pre-processing procedures. A sensing fusion method is utilized to overcome the accumulated errors introduced by the sensor drifting. Considering the application of 3D underground duct mapping in this research, a sensing system …

Women Leaders In Information Technology: A Phenomenological Study Of Their Career Paths, Michelle Newsome

Walden Dissertations and Doctoral Studies

In the United States, women remain underrepresented in senior level positions in the information technology (IT) field. Despite this challenge, a few women have successfully ascended into senior leadership in IT. Using the social cognitive theory as the conceptual framework, the purpose of this qualitative transcendental phenomenological study was to understand the lived experiences of senior women leaders in the IT field. The research question explored the lived personal and professional experiences of senior women leaders in IT to gain an understanding of their career advancement into senior leadership positions. Through the use of the modified Van Kaam method of …