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PAC-MC: An Efficient Password-Based Access Control Framework for Time Sequence Aware Media Cloud

IEEE Transactions on Mobile Computing 2025年第7期24卷 5632-5648页

作者： Wang, Haiyan Liu, Penghui Zhong, Xiaoxiong Luo, Fucai Xiao, Bin Yang, Yuanyuan Peng Cheng Laboratory Department of New Networks Shenzhen518000 China Zhejiang Gongshang University School of Computer Science and Technology Hangzhou China Hong Kong Polytechnic University Department of Computing Hong Kong Stony Brook University Department of Electrical and Computer Engineering Stony BrookNY11794 United States

Cloud storage makes it easier for users to access and share data remotely, but it often requires integration with cryptographic technologies to address consumer-oriented applications, such as fine-grained data access, secure data sharing and retrieval. This paper focuses on the fine-grained access problem of media applications based on time sequence, that is, certain critical media applications based on time sequences should ideally be accessible only to authorized clients. The traditional keyword-based searchable encryption (SE) allows effective search and access over encrypted data while preserving data privacy, but most existing solutions do not support temporal access control (i.e., a mechanism that grants access permissions to users within a specified time range). In this paper, we propose PAC-MC, an efficient password-based access control framework for media cloud relying on content control with the time sequence attribute. PAC-MC not only supports multi-keyword search using any monotonic boolean formulas but also allows media owners to control content-encryption keys for different time periods with an updatable password. Furthermore, it supports the self-retrieval of content-encryption keys. In addition, PAC-MC is provably secure under the standard model. Finally, the detailed performance evaluation results and experimental comparisons indicate that PAC-MC is very efficient and outperforms the previous solutions in terms of computation, communication, and storage costs. © 2025 IEEE.

关键词： Media Encryption Access control Cloud computing Servers Passwords Keyword search Copyright protection Streaming media Performance evaluation

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Inverse-Designed Grating Arrays for High-Sensitivity Plenoptic Time-of-Flight Pixels

Inverse-Designed Grating Arrays for High-Sensitivity Plenopt...

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2023 Optical Fiber Communications Conference and Exhibition, OFC 2023

作者： Rollinson, John Karlicek, Robert Hella, Mona Rensselaer Polytechnic Institute Department of Electrical and Computer Systems Engineering TroyNY12180 United States

We present a plenoptic time-of-flight pixel design using grating arrays with inverse-designed passive photonic power combining to achieve scalable signal-to-noise ratio. Experimental results are presented as a proof-o... 详细信息

ISBN: (纸本)9781957171180

关键词： Signal to noise ratio

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PneuTeleCNN: Deep Learning-assisted Framework for Pneumonia Identification in Web-enabled Telemedicine Systems 10

PneuTeleCNN: Deep Learning-assisted Framework for Pneumonia ...

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10th International Conference on Web Research, ICWR 2024

作者： Mahida, Nikunjkumar Parikh, Keertan Amit Darji, Krisha Gupta, Rajesh Tanwar, Sudeep Shahinzadeh, Hossein Mohammad-Hosseini, Melika Nirma University Institute of Technology Department of Computer Science and Engineering Ahmedabad India Amirkabir University of Technology Tehran Polytechnic Department of Electrical Engineering Tehran Iran Najafabad Branch Islamic Azad University Department of Electrical Engineering Najafabad Iran

ISBN: (纸本)9798350394986

An important development can be observed in the current environment of rapid technological progress in the healthcare industry, which can be demonstrated by the emergence of telemedicine as a key paradigm. Extensive use of telemedical techniques has happened with a particular focus on Tele-Pneumonia examinations, which provide doctors with crucial resources in remote diagnostic situations. In response to the necessity of accurate pneumonia prediction, we present a novel architecture PneuTeleCNN that makes utilization of pretrained models such as DenseNet-121, Visual Geometry Group (VGG-16), MobileNet, and InceptionV3. This thorough approach of PneuTeleCNN meticulously evaluates how effectively the system detects pneumonia in web-based telemedicine environments, establishing the stage for improved remote healthcare solutions. These model's performance is rigorously evaluated using key performance indicators, including accuracy, F1-score, recall, and precision. In addition, the evaluation includes sophisticated measures like the confusion matrix and receiver operating characteristic (ROC) curve, which offer an intricate perspective on the model's performance. To help in the identification of the model that performs better in this scenario, a comparative study is made more more straightforward by presenting of each model's validation accuracy and validation loss graphs. This PneuTeleCNN framework underscores the commitment to ensuring the robustness and reliability of the proposed telemedical approach for pneumonia detection in remote healthcare scenarios. © 2024 IEEE.

关键词： Telemedicine

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Artificial Intelligence Based Soilless Agriculture System Using Automatic Hydroponics Architecture 1st

Artificial Intelligence Based Soilless Agriculture System Us...

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1st EAI International Conference on Intelligent Systems and Machine Learning, ICISML 2022

作者： Hassan, Aveen Uthman Jibrin Musa, Mu’azu Salihu, Yahaya Otuoze Oremeyi, Abubakar Abisetu Ashafa, Fatima Department of Communication Sulaimani Polytechnic University Sulaymaniyah Iraq Department of Electronics and Telecommunication Engineering Ahmadu Bello University Zaria Nigeria Department of Computer Engineering Kaduna Polytechnic Kaduna Nigeria Department of Computer Engineering School of Engineering Kogi State Polytechnic Lokoja Itakpe Campus Lokoja Nigeria Department of Electrical and Electronics Engineering Federal Polytechnic Nasarawa Nigeria

ISBN: (纸本)9783031350801

The conventional practices of farming vegetables are inherently associated with the shortage of vegetables due to its seasonal nature, limited farming land and continuous demand. The introduction of artificial means of vegetable production is labor-intensive because of the processes involved in this paper an Artificial Intelligence (AI) based Nutrient Film Technique (NFT) hydroponics system will be designed to mitigate the shortage of vegetable production and minimizes labor. AI will be coded into the ATMEGA328P microcontroller using C++ to provide the required automatic control necessary for the NFT pumps and valves, while Attention Commands (AT) will be used for the interfaced Sim900 Global System for Mobile Communication (GSM) modem for sending Short Message Service (SMS) to the farm operator in case of any malfunction. The improved NFT is found to maximize farmland sine layers of plants can be arranged on one another at a given distance apart, which varies from plant to plant. The AI minimizes human intervention and provides exact mixing and supply of balanced nutrients to plants for fast growth and healthy plants. Continuous production throughout the year using precise AI techniques was designed. Therefore, an improved user-friendly NFT was achieved by utilizing AI embedded in a microcontroller. © 2023, ICST Institute for computer Sciences, Social Informatics and Telecommunications engineering.

关键词： Hydroponics

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Coil Optimization of a Planar Omnidirectional WPT System

Coil Optimization of a Planar Omnidirectional WPT System

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2024 IEEE Energy Conversion Congress and Exposition, ECCE 2024

作者： Yu, Xipei Feng, Junjie Zhu, Liyan Li, Qiang Virginia Polytechnic Institute and State University Center for Power Electronics Systems The Bradley Department of Electrical and Computer Engineering Blacksburg United States

ISBN: (纸本)9798350376067

Recently, omnidirectional wireless power transfer (WPT) has gained widespread popularity since 2010s especially in consumer electronics application benefiting from ease of integration with furniture. In such applications, angular misalignment occurs frequently. Obviously, it will affect the stable operation of system significantly. However, the coil optimization is not investigated accurately. In other words, the modelling and effects under angular misalignment are not investigated completely. Targeting at this, this article proposes a planar omnidirectional wireless power transfer system with three sets of planar coils. Afterwards, the modelling process is conducted for the planar omnidirectional WPT system under angular misalignment and Ns effect is investigated. Afterwards, the coil optimization is conducted to increase its usability in real applications. Finally in the experiment, three sets of coils are fabricated and the transfer efficiency are measured under orientation and angular misalignment at 6.78MHz. When charging the mobile phone and electronic watch receivers, the overall efficiency is 69%-78% and 55%-65%, considering the orientation and angular misalignment. © 2024 IEEE.

关键词： Inductive power transmission

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Design Optimization of a 3.3 V Bus Converter for Vertical Power Delivery in Next-Generation Processors

Design Optimization of a 3.3 V Bus Converter for Vertical Po...

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2024 IEEE Energy Conversion Congress and Exposition, ECCE 2024

作者： Liang, Yan Prakash, Pranav Raj Nabih, Ahmed Li, Qiang Virginia Polytechnic and State University Bradley Department of Electrical and Computer Engineering Blacksburg United States Nvidia Corporation Durham United States

ISBN: (纸本)9798350376067

The advancements in artificial intelligence and machine learning are driving the development of a new generation of ultra-powerful graphical processing units (GPUs). The latest datacenter-grade GPU cards use the two-stage lateral power delivery with a traditional 12V intermediate bus voltage (IBV). The next-generation GPUs are expected to double in power and package size, resulting in less space for higher power delivery. A previous study proposed a two-stage vertical power delivery solution by relocating the 2nd stage converters with a lower IBV. In this architecture, an unregulated LLC resonant converter (DCX) based 1st stage intermediate bus converter (IBC) steps down 48V to a low IBV, and the 2nd stage is a packaged voltage regulator stacked under the GPU minimizing the power delivery network (PDN) length;however, the I2R losses at a very low IBV will limit the overall high-power delivery. To ensure the high-power delivery to future GPUs, this paper focuses on the design of a high-efficiency, high-density 1st stage IBC with an IBV of 3.3V. A high-density LLC DCX based unit-cell design is implemented enabling the high-power delivery symmetrically. By optimizing the winding arrangement, the leakage flux and winding ac resistance of the transformer are minimized. Additionally, the non-ideal current sharing associated with the top-cooled module is mitigated. The elimination of these issues is critical as they lead to the degradation of parallel winding effectiveness and a reduction in efficiency. The proposed improvements are verified by developing an 840W 3.3V bus converter prototype with a peak efficiency of 97.3% and a power density of 2300 W/in. © 2024 IEEE.

关键词： Graphics processing unit

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Optimal Control of Drones for a Train-Drone Railway Diagnostic System 19

Optimal Control of Drones for a Train-Drone Railway Diagnost...

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19th IEEE International Conference on Automation Science and engineering, CASE 2023

作者： Proia, Silvia Cavone, Graziana Carli, Raffaele Dotoli, Mariagrazia Polytechnic of Bari Department of Electrical and Information Engineering Italy University Roma Tre Department of Civil Computer and Aeronautics Technologies Engineering Italy

ISBN: (纸本)9798350320695

The inspection of railway systems with traditional wayside detectors allows mainly the detection of wheels and axle bearings defects and can be time-demanding, unsafe, and heavily dependent on humans. To overcome these issues and then optimize and automate the rail and track diagnosis process, drones can be an excellent solution thanks to their onboard state-of-the-art cameras and sensors. Thus, with the aim of rapidly collecting highly accurate data, an innovative hybrid movable railway diagnostic architecture, consisting of a diagnostic train and a fleet of drones, is defined in this work. From the control point of view, the main interest is in optimally managing the crucial phase of drones returning to and landing on the moving train when the railway inspection mission is completed. To control the fleet of drones, a combination of consensus algorithm in the leader-following mode and linear quadratic regulator (LQR) is implemented for the flight formation phase and the landing phase on the moving base platform (i.e., the diagnostic train), respectively. The landing phase is performed both as vertical or oblique descent through a go to goal and as oblique descent along a predefined path. The obtained results of the railway diagnostic architecture simulations are presented and discussed in detail. In particular, they show that the vertical and oblique descent performed as go to goal are certainly faster than the oblique descent along a predefined path. © 2023 IEEE.

关键词： Drones

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Mutual Inductance Extraction and Power Allocation of a Planar Omnidirectional WPT System

Mutual Inductance Extraction and Power Allocation of a Plana...

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2024 IEEE Energy Conversion Congress and Exposition, ECCE 2024

ISBN: (纸本)9798350376067

In recent times, planar omnidirectional wireless power transfer has emerged as a prominent technology, especially in consumer electronics application. However, in such scenario, the presence of multiple receivers with angular misalignment often results in unstable operation due to variations in mutual inductance. To address this challenge, this article undertakes the modelling of several receiver coils and proposes a method to extract mutual inductance between them utilizing additional DC/DC converters. This extraction process serves to mitigate these effects, thereby enabling effective power allocation among multiple receivers Finally, the experimental validation is conducted. at 6.78MHz. When charging the mobile phone and electronic watch receivers, the overall efficiency is 68%-77% and 56%-66%, considering the orientation and angular misalignment. © 2024 IEEE.

关键词： Inductive power transmission

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In-situ fabrication of vertical heterogeneous nickel diselenide-molybdenum diselenide architectures as bifunctional overall water-splitting electrocatalyst

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Journal of Materials Science & Technology 2024年第10期177卷 256-263页

作者： He Zhou Jingrui Hou Limin Zhang Dezhi Kong Hui Wang Longhui Zeng Zhiwei Ren Tingting Xu Ye Wang Key Laboratory of Material Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001China Department of Electrical and Computer Engineering University of California at San DiegoSan DiegoCA 92093USA Department of Electronic and Information Engineering The Hong Kong Polytechnic UniversityHung HomKowloon 999077Hong KongChina

Despite the rapid advances in electrocatalysts based on two-dimensional(2D)transition metal dichalco-genides(TMDs)materials,they are subject to serious aggregation,poor conductivity and the presence of inactive basal ***,we have successfully demonstrated the in-situ construction of NiSe_(2)-MoSe_(2) heterostructure arrays on carbon cloth(NiSe_(2)-MoSe_(2)/CC)by a facile two-step hydrothermal *** presence of the synergistic effect in the heterostructures effectively optimizes the poor conductivity and hydrophilicity,and thus enables fast electron transfer,leading to enhanced electrochemical ***-thermore,density functional theory calculations reveal that the electrons redistribution at the heterojunc-tion interface and the reduced Gibbs free energy of hydrogen adsorption for hydrogen evolution reaction(HER)/the Gibbs free energy change value of rate-determining step for oxygen evolution reaction(OER),thus enhancing the HER/OER catalytic ***,the device displays a good performance with a low overpotential of 98 and 310 mV for HER and OER,respectively,and a low cell voltage of 1.59 V for its corresponding electrolyzer(10 mA cm^(-2)).This work presents the high-performance water splitting of bifunctional electrocatalysts based on 2D TMDs materials and offers a novel design concept of interface engineering.

关键词： Bifunctional electrocatalyst Heterostructures Hydrogen/oxygen evolution reaction Water splitting Synergistic effect

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Analysis on unit maximum capacity of orthogonal multiple watermarking for multimedia signals in B5G wireless communications

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Digital Communications and Networks 2024年第1期10卷 38-44页

作者： Mianjie Li Senfeng Lai Jiao Wang Zhihong Tian Nadra Guizani Xiaojiang Du Chun Shan School of Electronics and Information Guangdong Polytechnic Normal UniversityGuangzhou510665China Cyberspace Institute of Advanced Technology Guangzhou UniversityGuangzhou510006China Schoolof Electrical Engineering and Computer Science Washington State UniversityPullmanWA99164USA Department of Computer and Information Science Temple UniversityPhiladelphiaPA19122USA

Beyond-5G(B5G)aims to meet the growing demands of mobile traffic and expand the communication *** that intelligent applications to B5G wireless communications will involve security issues regarding user data and operational data,this paper analyzes the maximum capacity of the multi-watermarking method for multimedia signal hiding as a means of alleviating the information security problem of *** multiwatermarking process employs spread transform dither *** the watermarking procedure,Gram-Schmidt orthogonalization is used to obtain the multiple spreading ***,multiple watermarks can be simultaneously embedded into the same position of a multimedia ***,the multiple watermarks can be extracted without affecting one another during the extraction *** analyze the effect of the size of the spreading vector on the unit maximum capacity,and consequently derive the theoretical relationship between the size of the spreading vector and the unit maximum capacity.A number of experiments are conducted to determine the optimal parameter values for maximum robustness on the premise of high capacity and good imperceptibility.

关键词： B5G Multimedia information security Spread transform dither modulation Spreading vector measurement Unit maximum capacity

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