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HoloStream: a GPU-powered high-speed user interface for holographic microscopy imaging

Optics Express 2025年第7期33卷 15648-15660页

作者： Morales, Johan Obando-Vásquez, Sofia Doblas, Ana Trujillo, Carlos Applied Optics Group School of Applied Science and Engineering EAFIT University Medellin Colombia Optical Imaging Research Lab Electrical and Computer Engineering Department University of Massachusetts Dartmouth DartmouthMA United States

This paper presents HoloStream, a GPU-powered high-speed user interface designed for holographic microscopy imaging. The platform reconstructs quantitative phase images rapidly for off-axis digital holographic microscopy (DHM) systems operating in the telecentric regime. By optimizing critical computational procedures, the HoloStream app reconstructs phase maps of 1280 × 960 pixels up to 11 frames per second (FPS) in live visualization and 90 fps for pre-recorded holographic videos. This real-time phase compensation is performed by upgrading the semi-heuristic phase compensation (SHPC) algorithm through GPU acceleration via PyCUDA. The interface also offers a user-friendly experience with flexible control over acquisition modes, visualization formats, and 3D tracking functionalities. Experimental validation demonstrates the platform’s capability to achieve fast and accurate phase imaging for live microscopy applications. The HoloStream app advances DHM technology by combining high-speed processing with ease of use, making it suitable for a wide range of DHM imaging applications. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： computer graphics equipment

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Intelligent Orchestrating of IoT Microservices Based on Reinforcement Learning

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Chinese Journal of Electronics 2022年第5期31卷 930-937页

作者： WU Yuqin SHEN Congqi CHEN Shuhan WU Chunming LI Shunbin WEI Ruan College of Computer Science and Technology Zhejiang University College of Information and Electrical Engineering Ningde Normal University Zhejiang Lab College of Control Science and Engineering Zhejiang University

With the recent increase in the number of Internet of things(IoT) services, an intelligent scheduling strategy is needed to manage these services. In this paper, the problem of automatic choreography of microservices in IoT is explored. A type of reinforcement learning(RL) algorithm called TD3 is used to generate the optimal choreography policy under the framework of a softwaredefined network. The optimal policy is gradually reached during the learning procedure to achieve the goal, despite the dynamic characteristics of the network environment. The simulation results show that compared with other methods, the TD3 algorithm converges faster after a certain number of iterations, and it performs better than other non-RL algorithms by obtaining the highest reward. The TD3 algorithm can effciently adjust the traffic transmission path and provide qualified IoT services.

关键词： software-defined network telecommunication scheduling intelligent orchestrating nonRL algorithms reinforcement learning software defined networking optimal choreography policy reinforcement learning algorithm Internet of things services network environment IoT microservices TD3 algorithm traffic transmission path Internet of Things qualified IoT services intelligent scheduling strategy dynamic characteristics

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Themis: Adaptive CPU Resource Allocation for VMs on Heterogeneous Multicore Architectures 10

Themis: Adaptive CPU Resource Allocation for VMs on Heteroge...

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10th IEEE Smart World Congress, SWC 2024

作者： Yang, Yecheng Pang, Pu Wang, Jiawen Chen, Quan Chen, Weiwei Li, Li Guo, Minyi Shanghai Jiao Tong University Department of Computer Science and Engineering China Shuhai Lab Huawei Cloud Computing Technologies Co. Ltd China

ISBN: (纸本)9798331520861

Tenants usually rent virtual machines (VMs) to deploy their applications, while those VMs are generally colocated on the same physical machine by the cloud provider to improve resource utilization. Meanwhile, modern CPUs are evolving towards heterogeneous multicore architecture, which integrates powerful brawny cores and power-efficient wimpy cores into a CPU of a machine. This paper focuses on how to allocate CPU resources when co-locating VMs on the heterogeneous architecture. When a VM is created by the Kernel-based Virtual Machine (KVM) virtualization technology, it consists of vCPU threads and Emulator threads. Our investigation shows that properly setting the range of CPU cores where Emulator threads are allowed to run can further improve the VM performance, when using Linux Completely Fair Scheduler (CFS) to schedule VMs. However, it is challenging to find the proper range setting because running different applications in the VM leads to nonidentical optimal range settings, and the VM is usually a black-box from the perspective of the cloud provider. We therefore propose Themis, a runtime system comprising a core scheduler and a load monitor. The core scheduler finds the proper range setting based on low-level information, while the load monitor identifies whether the load of the VM is significantly changed and the range is required to be adjusted. The experimental results show that Themis improves the performance of popular cloud applications by up to 48.4% compared with prior work. © 2024 IEEE.

关键词： Resource allocation

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LBA: Matching Theory Based Latency-Sensitive Binary Offloading in IoT-Fog Networks 16

LBA: Matching Theory Based Latency-Sensitive Binary Offloadi...

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16th International Conference on COMmunication Systems and NETworkS, COMSNETS 2024

作者： Soni, Priyanka Deshlahre, Omkar Chand Satpathy, Anurag Addya, Sourav Kanti National Institute of Technology Karnataka Cloud and Smart System Services Lab Department of Computer Science and Engineering India Missouri University of Science and Technology RollaMO United States

ISBN: (纸本)9798350383119

The Internet of Things (IoT) is growing more popular with applications like healthcare services, traffic monitoring, video streaming, smart homes, etc. These applications produce an enormous amount of data, so a realistic option in this instance is to offload computational tasks to their proximity fog nodes (FNs) instead of the remote cloud. However, a negligent offloading strategy may cause anomalous computational traffic load at the FNs, causing congestion that may adversely affect the latency. However, the latency of task flows from IoT devices comprises communications latency at BS and computational latency at FNs. Therefore, designing offloading algorithms to distribute the computational load at FN evenly and efficiently utilize the FN resources is crucial. To solve this problem, we proposed LBA in a fog network with a binary offloading strategy using the matching theory-based approach. We utilize the Analytic Hierarchy Process (AHP) to generate the preference list. Furthermore, the binary offloading technique follows the deferred acceptance algorithm (DAA) to produce a stable assignment, and the complete offloading problem is modeled as a one-to-many matching game. Comprehensive simulations ensure that LBA can accomplish a better-balanced assignment for homogeneous and heterogeneous input concerning all the baseline algorithms. © 2024 IEEE.

关键词： Analytic Hierarchy Process (AHP) Binary offloading Fog computing IoT Load balancing Matching Theory

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Survey on recent advances in IoT application layer protocols and machine learning scope for research directions

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Digital Communications and Networks 2022年第5期8卷 727-744页

作者： Praveen Kumar Donta Satish Narayana Srirama Tarachand Amgoth Chandra Sekhara Rao Annavarapu Department of Computer Science and Engineering Indian Institute of Technology(Indian School of Mines)Dhanbad826004India School of Computer and Information Sciences University of HyderabadHyderabad500046India Mobile&Cloud Lab Institute of Computer ScienceFaculty of Science and TechnologyUniversity of Tartu50090Estonia

The Internet of Things(IoT)has been growing over the past few years due to its flexibility and ease of use in real-time *** IoT's foremost task is ensuring that there is proper communication among different types of applications and devices,and that the application layer protocols fulfill this ***,as the number of applications grows,it is necessary to modify or enhance the application layer protocols according to specific IoT applications,allowing specific issues to be addressed,such as dynamic adaption to network conditions and ***,several IoT application layer protocols have been enhanced and modified according to application ***,no existing survey articles focus on these *** this article,we survey traditional and recent advances in IoT application layer protocols,as well as relevant real-time applications and their adapted application layer protocols for improving *** changing the nature of protocols for each application is unrealistic,machine learning offers means of making protocols intelligent and is able to adapt *** this context,we focus on providing open challenges to drive IoT application layer protocols in such a direction.

关键词： Internet of things Machine learning Application layer Request-response protocols Publish-subscribe protocols

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Sensitivity Analysis of a Flexible Piezoresistive Sensor for Efficient Packaging

Sensitivity Analysis of a Flexible Piezoresistive Sensor for...

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2023 IEEE Applied Sensing Conference, APSCON 2023

作者： Singh, Lakhvir Bhattacharjee, Mitradip I-lab Electrical Engineering and Computer Science MP Bhopal462066 India

ISBN: (纸本)9781665461634

In this study, the packaging requirements and challenges of a microstructure-based flexible piezoresistive pressure sensor are investigated. The sensor shows a high value of sensitivity of 9.51 kPa-1 at low (0-10 kPa), 0.24 kPa-1 at medium (10-40 kPa), and 0.11 kPa-1 at high pressure ranges (40- 70 kPa). The sensor was experimentally characterized for a pressure range of 0-70 kPa and its piezoresistive response was measured. Sensitivity performance at different regions of the sensor was analyzed. The experimental data for sensitivity shows a high variation in the sensitivity of the sensor for different regions of pressure application with values being quite low at the periphery and a high value near the center (equivalent to the case of uniform applied pressure). Packaging issues related to the sensor are addressed based on the outcomes. © 2023 IEEE.

关键词： Sensitivity analysis

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A flexible capacitive photoreceptor for the biomimetic retina

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Light(science & Applications) 2022年第1期11卷 38-49页

作者： Mani Teja Vijjapu Mohammed E.Fouda Agamyrat Agambayev Chun Hong Kang Chun-Ho Lin Boon S.Ooi Jr-Hau He Ahmed M.Eltawil Khaled N.Salama Sensors lab Advanced Membranes and Porous Materials CenterComputerElectrical and Mathematical Science and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Kingdom of Saudi Arabia Communication and Computing Systems Lab ComputerElectrical and Mathematical Science and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Kingdom of Saudi Arabia Department of Electrical Engineering and Computer Science University of California-IrvineIrvineCA 92612USA Department of Electrical Computer and Energy EngineeringArizona State UniversityTempeAZUSA Computer Electrical and Mathematical Science and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Kingdom of Saudi Arabia Department of Materials Science and Engineering City University of Hong KongHong Kong SARChina

Neuromorphic vision sensors have been extremely beneficial in developing energy-efficient intelligent systems for robotics and privacy-preserving security *** is a dire need for devices to mimic the retina's photoreceptors that encode the light illumination into a sequence of spikes to develop such ***,we develop a hybrid perovskite-based flexible photoreceptor whose capacitance changes proportionally to the light intensity mimicking the retina's rod cells,paving the way for developing an efficient artificial retina *** proposed device constitutes a hybrid nanocomposite of perovskites(methyl-ammonium lead bromide)and the ferroelectric terpolymer(polyvinylidene fluoride trifluoroethylene-chlorofluoroethylene).A metal-insulator-metal type capacitor with the prepared composite exhibits the unique and photosensitive capacitive behavior at various light intensities in the visible light *** proposed photoreceptor mimics the spectral sensitivity curve of human photopic *** hybrid nanocomposite is stable in ambient air for 129 weeks,with no observable degradation of the composite due to the encapsulation of hybrid perovskites in the hydrophobic *** functionality of the proposed photoreceptor to recognize handwritten digits(MNIST)dataset using an unsupervised trained spiking neural network with 72.05%recognition accuracy is *** demonstration proves the potential of the proposed sensor for neuromorphic vision applications.

关键词： perovskite illumination preserving

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Corona Inception and Breakdown in High-Altitude, Low-Pressure Air under Negative DC Voltage for Aircraft Electrification Applications

Corona Inception and Breakdown in High-Altitude, Low-Pressur...

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2024 IEEE Conference on electrical Insulation and Dielectric Phenomena, CEIDP 2024

作者： Kalakonda, Sai Pavan Hamidieh, Mohammad Ghassemi, Mona The University of Texas at Dallas ZEROES lab Department of Electrical and Computer Science Engineering RichardsonTX United States

ISBN: (纸本)9798350366679

The achievement of the net-zero emission goal is considered contingent upon the implementation of transportation electrification. Presently, all-electric commercial vehicles are restricted to land and water transport. The prospect of complete electrification of aircraft, particularly the plausible realization of all-electric aircraft (AEA), is acknowledged as being imminent. Within the electric power system (EPS) designs proposed for AEA, medium DC voltage systems in the order of up to a few tens of kilovolts are employed. Challenges manifest in the management of such voltages within a low-pressure environment. One of the emerging challenges pertains to the partial discharge (PD) behavior under DC stress, a phenomenon acknowledged to exhibit pressure- and field-dependent variations. The importance of studying the dynamics of pre-breakdown and breakdown phenomena in such environments is underscored by the fact that air serves as a crucial insulator for the EPS in AEA. Accordingly, this experimental study aims to comprehend the behavior of air subjected to high negative DC voltages and offer insights into the PD onset dynamics, specifically corona inception and breakdown. This investigation utilizes a needle-to-plane electrode configuration, examining its performance under a standard range of aviation-specific pressures across varying air gaps. The findings of this study contribute to the development of reliable electrical insulation systems tailored to withstand the demanding conditions encountered during aircraft operation. © 2024 IEEE.

关键词： Partial discharges

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Developing an MVDC Bipolar Coaxial Cable System for Lunar Power Transmission

Developing an MVDC Bipolar Coaxial Cable System for Lunar Po...

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2024 IEEE Conference on electrical Insulation and Dielectric Phenomena, CEIDP 2024

作者： Saha, Anoy Ghassemi, Mona The University of Texas at Dallas ZEROES lab Department of Electrical and Computer Science Engineering RichardsonTX United States

ISBN: (纸本)9798350366679

The increasing need for power on the lunar surface, expected to reach megawatt levels, aligns with NASA's goal of establishing a sustainable human presence on the Moon, able to support over 100 personnel indefinitely. As humanity explores sustained lunar habitation and aims to establish bases, efficient and reliable power transmission becomes crucial. Power lines with high power density are needed, focusing on weight and volume while ensuring safety and cost-effectiveness in the harsh lunar environment. There are three possible locations for power lines on the lunar surface: above, on, or below the surface. Due to harsh lunar conditions like temperature fluctuations, micro meteoroid impacts, and radiation exposure, the initial two methods have limited effectiveness in transferring power on the moon. Underground deployment is considered safe and convenient;however, low soil thermal conductivity could pose a challenge. However, a temperature of -23.15 °C at a depth of 30 cm proves beneficial for waste heat. This study employs COMSOL Multiphysics to propose a novel method for developing and analyzing bipolar MVDC cables for power transmission beneath the lunar surface. Designed for ±10 kV voltage and 2 MW power, these cables offer an efficient solution for lunar power transmission and are resilient to harsh conditions. © 2024 IEEE.

关键词： Waste heat

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Calculation of Television Interference (TVI) for Unconventional High Surge Impedance Loading (HSIL) Transmission Lines

Calculation of Television Interference (TVI) for Unconventio...

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2024 IEEE Conference on electrical Insulation and Dielectric Phenomena, CEIDP 2024

作者： Khan, Mushfiqul Abedin Ghassemi, Mona The University of Texas at Dallas ZEROES lab Department of Electrical and Computer Science Engineering RichardsonTX United States

ISBN: (纸本)9798350366679

Television Interference (TVI) is a pivotal factor in high voltage transmission line design. TVI occurs because of corona discharges along the transmission line, causing signal deterioration and power loss. Conventional lines have the bundled conductors symmetrically placed on a circle, and the bundle radius is chosen such that the corona discharge effects are reduced. High Surge Impedance Loading (HSIL) transmission lines consist of a higher number of subconductors and a larger bundle radius, increasing line loadability. Conductor costs are reduced by using subconductors with smaller radii. The novel 500 kV unconventional HSIL line designed in this paper exhibits a potential to enhance the natural power of the line and differ from the conventional HSIL and the conventional lines in having asymmetrical bundled conductor configurations. For this unconventional HSIL line, TVI produced due to corona discharges on and around the line are calculated and compared to the conventional line. As a result of this study, we are taking a step forward toward the development of unconventional HSIL lines for modern power systems that will revolutionize power delivery. © 2024 IEEE.

关键词： Television interference

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