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24th IEEE International Conference on Data Mining Workshops, ICDMW 2024

作者： Zhang, Yiwei Behnia, Rouzbeh Yavuz, Attila A. Ebrahimi, Reza Bertino, Elisa Purdue University Department of Computer Science West Lafayette United States University of South Florida School of Information Systems and Management Sarasota United States University of South Florida Department of Computer Science and Engineering Tampa United States University of South Florida School of Information Systems and Management Tampa United States

ISBN: (纸本)9798331530631

Federated learning enables the collaborative learning of a global model on diverse data, preserving data locality and eliminating the need to transfer user data to a central server. However, data privacy remains vulnerable, as attacks can target user training data by exploiting the updates sent by users during each learning iteration. Secure aggregation protocols are designed to mask/encrypt user updates and enable a central server to aggregate the masked information. MicroSecAgg (PoPETS 2024) proposes a single server secure aggregation protocol that aims to mitigate the high communication complexity of the existing approaches by enabling a one-time setup of the secret to be re-used in multiple training iterations. In this paper, we identify a security flaw in the MicroSecAgg that undermines its privacy guarantees. We detail the security flaw and our attack, demonstrating how an adversary can exploit predictable masking values to compromise user privacy. Our findings highlight the critical need for enhanced security measures in secure aggregation protocols, particularly the implementation of dynamic and unpredictable masking strategies. We propose potential countermeasures to mitigate these vulnerabilities and ensure robust privacy protection in the secure aggregation frameworks. © 2024 IEEE.

关键词： Federated learning

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Effect of Handshake in VR Environment via Robotic Arm on Psychological Distance

Effect of Handshake in VR Environment via Robotic Arm on Psy...

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IEEE International Workshop on Robot and Human Communication (ROMAN)

作者： Haruto Mukuno Daigo Misaki Graduate School of Engineering Mechanical Engineering Program Kogakuin University Tokyo Japan Faculty of Engineering Department of Mechanical Systems Engineering Kogakuin University Tokyo Japan

The COVID-19 pandemic has popularized telework using video chat tools. Although video chat tools allow people to communicate each other in remote locations, psychological distance is longer than face-to-face communication, which may lead to a lack of intimacy. Previous studies have shown that interfaces combining video chat, VR, and robots with handshakes can improve the sense of closeness. However, few studies have focused on the sense of closeness in interfaces combining VR and robots. In this study, we proposed a multimodal interface combining VR and a robotic arm and verified whether shaking hands with a remote partner in VR could shorten the psychological distance compared to video chat. The results showed that the psychological distance was predominantly shorter in VR communication than in video chat communication; however, a handshake using robotic arm did not shorten the psychological distance compared to a handshake without a robotic arm. These results indicate that spatial distance is shorter in VR than in video chat and that robotic arms must be made more human-like.

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The Centrifugal Nuclear Thermal Rocket: Foundations, Challenges, and Progress

The Centrifugal Nuclear Thermal Rocket: Foundations, Challen...

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AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025

作者： Thomas, Dale Houts, Michael Wang, Dean Hollingsworth, Keith Frederick, Robert Cassibry, Jason Department of Industrial & Systems Engineering and Engineering Management The University of Alabama in Huntsville HuntsvilleAL35899 United States Space Nuclear Propulsion Program Office NASA Marshall Space Flight Center HuntsvilleAL35812 United States Department of Mechanical & Aerospace Engineering The Ohio State University ColumbusOH43210 United States Department of Mechanical & Aerospace Engineering and Interim Dean of the Honors College The University of Alabama in Huntsville HuntsvilleAL35899 United States Department of Mechanical & Aerospace Engineering Propulsion Research Center The University of Alabama in Huntsville HuntsvilleAL35899 United States Department of Mechanical & Aerospace Engineering The University of Alabama in Huntsville HuntsvilleAL35899 United States

ISBN: (数字)9781624107238

ISBN: (纸本)9781624107238

The Centrifugal Nuclear Thermal Rocket (CNTR) is a Nuclear Thermal Propulsion (NTP) concept designed to heat propellant directly by the reactor fuel. The primary difference between the CNTR concept and traditional NTP systems is that rather than using traditional solid fuel elements, the CNTR uses liquid fuel with the liquid contained in rotating cylinders by centrifugal force. If the concept can be successfully realized, the CNTR would have a high specific impulse (up to 1800 s) at high thrust, which may enable (i) viable near-term human Mars exploration by reducing round-trip times to 420 days and (ii) direct injection orbits for scientific rendezvous missions to the Solar System outer planets and Kuiper Belt objects. Research is presently underway to determine resolutions for the significant engineering challenges that the CNTR concept presents. These challenges, the study plans to address them, and progress have been described previously;this paper provides an update on progress to date for the overall research effort, including strategies and key results on revision of a reference configuration, definition of key parameters which allows integration of the results of various analyses, and reviews strategies to mitigate the problem of Uranium vapor saturating the propellant exhaust and significantly impacting the CNTR’s specific impulse. Analyses and experiments, both underway and planned, to update estimates of engine key performance parameters including specific impulse, thrust and thrust to weight ratio along with the identification of selected design margins within the engine itself are described – all toward the goal of enabling plans for a laboratory demonstration of a single Centrifugal Fuel Element. © 2025, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Rockets

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Effects of the Organizational Knowledge management systems on Psychological Well-Being Among Employees in Private Large-Scale IT Organizations in Sri Lanka 3

Effects of the Organizational Knowledge Management Systems o...

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3rd International Conference on Advanced Research in Computing, ICARC 2023

作者： Aratthanage, Kasun Wijekoon, Janaka Sri Lanka Institute of Information Technology Faculty of Graduate Studies & Research Malabe Sri Lanka Military Technological College Systems Engineering Department Muscat Oman

ISBN: (纸本)9798350347371

The goal of this study basically focuses on evaluating the Organizational Knowledge management systems (KMS) and their impact on psychological well-being among employees in selected large-scale private IT organizations in Sri Lanka. It evaluates Knowledge management systems quality dimensions, KMS adoption of users, and psychological well-being. Knowledge management is an essential part in IT industry. Gaining domain knowledge from one starting point to sharing knowledge among organizations is a very complex process, therefore, different types of Knowledge management systems are implemented within IT organizations. There are several quality dimension factors introduced to determine better knowledge management systems. This research evaluates eight quality dimensions against four psychological aspects. In this study, statistical analysis was used to determine the statistically significant levels, correlations and relationships between the independent and dependent variables. Ultimately the results can be used to improve the Human-centered Knowledge management System's design approach with balanced employee psychological well-being. For further improvements, the results can be used to build interactive knowledge management software-based solutions. © 2023 IEEE.

关键词： Knowledge management

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Object Detection and Text Recognition for Immersive Augmented Reality Training in Laser Powder Bed Fusion

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Procedia Computer Science 2024年 232卷 913-923页

作者： Hongji Zhang Yecheng Jiao Yizhuo Yuan Yuanchen Li Yiqin Wang Wenfeng Lu Jerry Fuh Bingbing Li Department of Mechanical Engineering National University of Singapore Singapore 119077 Singapore Department of Manufacturing Systems Engineering and Management California State University Northridge CA 91330 USA

Professional Training for laser powder bed fusion equipment operation typically is time consuming and expensive for end-users in metal Additive Manufacturing (AM). This study proposes a practical solution by leveraging Hyperskill software to develop a immersive training program compatible with Augmented Reality (AR) devices. The program incorporates the YOLOv7 object detection algorithm and the CRAFT(Character Region Awareness for Text detection) Four-stage text recognition algorithm, seamlessly bridging the gap between reality and simulation. Through a human subjects study, we demonstrate the effectiveness and viability of the AR program, showcasing its capacity to deliver real-time, comprehensive training in metal AM processes. This approach offers a balanced and efficient solution for improving professional training in the field of metal AM.

关键词： Immersive Augmented Reality Training Metal Additive Manufacturing Text Recognition Object Detection

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Ideal Secret Sharing Schemes: Combinatorial Characterizations, Certain Access Structures, and Related Geometric Problems

arXiv

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arXiv 2023年

作者： Fuji-Hara, Ryoh Miao, Ying Department of Social Systems and Management Graduate School of Systems and Information Engineering University of Tsukuba Tsukuba305-8573 Japan

An ideal secret sharing scheme is a method of sharing a secret key in some key space among a finite set of participants in such a way that only the authorized subsets of participants can reconstruct the secret key from their shares which are of the same length as that of the secret key. The set of all authorized subsets of participants is the access structure of the secret sharing scheme. In this paper, we derive several properties and restate the combinatorial characterization of an ideal secret sharing scheme in Brickell-Stinson model in terms of orthogonality of its representative array. We propose two practical models, namely the parallel and hierarchical models, for access structures, and then, by the restated characterization, we discuss sufficient conditions on finite geometries for ideal secret sharing schemes to realize these access structure models. Several series of ideal secret sharing schemes realizing special parallel or hierarchical access structure model are constructed from finite projective planes. Copyright © 2023, The Authors. All rights reserved.

关键词： Geometry

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Technical Note—Online Matching with Bayesian Rewards

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Operations Research 2025年第1期73卷 278-289页

作者： Simchi-Levi, David Sun, Rui Wang, Xinshang Institute for Data Systems and Society Department of Civil & Environmental Engineering Operations Research Center Massachusetts Institute of Technology CambridgeMA02139 United States Institute for Data Systems and Society Massachusetts Institute of Technology CambridgeMA02139 United States Alibaba Group US San MateoCA94402 United States Antai College of Economics and Management Shanghai Jiao Tong University Shanghai200240 China

We study in this paper an online matching problem where a central platform needs to match a number of limited resources to different groups of users that arrive sequentially over time. The reward of each matching option depends on both the type of resource and the time period the user arrives. The matching rewards are assumed to be unknown but drawn from probability distributions that are known a priori. The platform then needs to learn the true rewards online based on real-time observations of the matching results. The goal of the central platform is to maximize the total reward from all of the matchings without violating the resource capacity constraints. We formulate this matching problem with Bayesian rewards as a Markovian multiarmed bandit problem with budget constraints, where each arm corresponds to a pair of a resources and a time period. We devise our algorithm by first finding policies for each single arm separately via a relaxed linear program and then "assembling" these policies together through judicious selection criteria and well-designed pulling orders. We prove that the expected reward of our algorithm is at least 12 (√ffiffiffi 2 - 1) of the expected reward of an optimal algorithm. Copyright: © 2023 INFORMS.

关键词： Budget control

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CONDUCTIVITY STUDIES IN MXENE-PVDF COMPOSITE MEMBRANES FOR PEM FUEL CELLS APPLICATIONS 50

CONDUCTIVITY STUDIES IN MXENE-PVDF COMPOSITE MEMBRANES FOR P...

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50th International Conference on Computers and Industrial engineering: Sustainable Digital Transformation, CIE 2023

作者： Shaikh, Ryan Al Al-Othman, Amani Nancarrow, Paul Tawalbeh, Muhammad Shamayleh, Abdulrahim Engineering Systems and Management PhD Program American University of Sharjah Sharjah United Arab Emirates Department of Chemical and Biological Engineering American University of Sharjah Sharjah United Arab Emirates University of Sharjah P. O. Box Sharjah27272 United Arab Emirates Department of Industrial Engineering American University of Sharjah Sharjah United Arab Emirates

ISBN: (纸本)9781713886952

Energy supply and demand are at the core of one of the pressing problems worldwide as the present energy production is still dominated by non-renewable resources. The need to meet the goals for the climate has motivated the energy sector to embrace cleaner and greener electro-energy systems. Proton exchange membrane (PEM) fuel cells, also known as polymer-electrolyte membrane fuel cells, have lately attracted more attention from various sectors due to their exceptional advantages, including high theoretical efficiency, low operating temperatures, and low-to-zero emissions. Therefore, they can be successfully used in a variety of applications. Hence, a novel membrane that possesses adequate proton conductivity is required. Therefore, in this work, MXene was investigated as a potential proton conductor. MXene/PVDF based membrane was synthesized with different concentrations 3, 5, 8, 10, 13 and 15 wt.% respectively, and evaluated for their proton conduction using electrochemical impedance spectroscopy (EIS). The values of the conductivity obtained were:3.22× x10- 3, 6.2× x10-3, 0.025, 0.041, 3.77×10-3 and 4.2 ×10-3 S/cm, respectively. The results of this study show that the synthesized membranes in this work appear to be promising for PEM fuel cells applications. © 2023 Computers and Industrial engineering. All rights reserved.

关键词： Proton conductivity

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Implementation of Light and Dark Adaptation Function for High QOL 3D-Stacked Artificial Retina Chip

Implementation of Light and Dark Adaptation Function for Hig...

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2022 IEEE Biomedical Circuits and systems Conference, BioCAS 2022

作者： Nakamura, Kohei Liang, Yaogan Du, Bang Wang, Shengwei Aruga, Yuta Inoue, Bunta Kino, Hisashi Fukushima, Takafumi Kiyoyama, Koji Tanaka, Tetsu Department of Mechanical Systems Engineering Graduate School of Engineering Tohoku University Sendai980-8579 Japan Graduate School of Biomedical Engineering Tohoku University Sendai980-8579 Japan Graduate School of Engineering Nagasaki Institute of Applied Science Nagasaki851-0193 Japan

ISBN: (数字)9781665469173

ISBN: (纸本)9781665469173

The increase in the number of visually impaired people has led to active research on artificial retinas. In our laboratory, we study a fully-implantable retinal prosthesis using a 3D-stacked artificial retina chip, which provides highly visible visual information with edge enhancement and binarization functions. However, since the visibility of objects can be significantly reduced when the ambient illumination is low, the light and dark adaptation (LDA) function is needed to provide the same visibility regardless of the ambient illumination. Conventional LDA functions have operability, comfort, and circuit area problems in these situations. In this study, we proposed a small-area LDA function circuit that provided visual information with high quality of life and evaluated a prototype circuit. © 2022 IEEE.

关键词： Visibility

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Multi-Objective Grey Wolf Optimizer for the Tuning Process of the FOPID Controller

Multi-Objective Grey Wolf Optimizer for the Tuning Process o...

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IEEE/IAS International Conference on Industry Applications (INDUSCON)

作者： Allan Christian Krainski Ferrari Gideon Villar Leandro Leandro Dos Santos Coelho Gilberto Reynoso Meza Eletrical Engineering Department Federal University of Paraná UFPR Curitiba Brazil Electrical Engineering Graduate Program (PPGEE) Federal University of Paraná (UFPR) Industrial and Systems Engineering Graduate Program (PPGEPS) Pontifical Catholic University of Paraná (PUCPR) Industrial and Systems Engineering Graduate Program (PPGEPS) Pontifical Catholic University of Paraná Curitiba Brazil

This article implements the multi-objective grey wolf optimizer (MOGWO) in the tuning process of the gains of the Fractional-Order Proportional-Integral-Derivative (FOPID) controller applied in the control of a boiler system. For a sequence of 100 runs, this application had compared and analyzed with other implementation that uses MOGWO to optimize the gains of the classical Proportional-Integral-Derivative (PID) controller. In the computational simulation, the value hypervolume metric had used to analyze the performance of the controllers. In the results, the implementation of the FOPID showed superior to PID, where the comparison had validated by a hypothesis test. Despite the higher computational cost concerning the tuning process of the PID controller, this study proved that the FOPID controller can be advantageous for industrial applications.

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