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Dielectric characteristics and energy storage capabilities of PVDF-based composite incorporating 2D GnP nanofiller

Results in engineering 2025年 26卷

作者： Hota, Sudhansu Sekhar Panda, Debasish Panda, Rojalin Mishra, Soumya Choudhury, S. Biswal, L. Choudhary, R.N.P. Satapathy, Anshuman Dept. of Physics Multifunctional Research Lab S‘O'A University Bhubaneswar 751030 India Department of Chemistry Environmental Science and Technology Program S ‘O’ A University Bhubaneswar 751030 India Department of Electrical and Electronics Engineering S‘O'A University BBSR Odisha 751030 India School of Applied Sciences KIIT University BBSR 751024 India

Hybrid nanofiller engineered for polymer nanocomposite are anticipated to achieve superior energy storage performance due to their diverse morphologies and electrical properties. In this study, 2D graphite nanoparticle (GnP) heterostructures were synthesized on surfaces and incorporated into poly(vinylidene fluoride) (PVDF) to develop PVDF-based composite (PVDF-GnP) using the solution casting route. At room temperature and an electric field of 60 kV/cm, the composite exhibits a maximum polarization of 0.079 μC/cm², while the discharged energy density reaches 2.22 J/cm³. The dielectric constant of 0.2 wt% GnP/PVDF at room temperature and at a frequency of 10³ Hz is ∼52, with a low dielectric loss of 0.25, approximately five times higher than that of pure PVDF (∼10 at 25 °C). Notably, the incorporation of GnP into the PVDF matrix significantly reduces AC conductivity, emphasizing its suitability for energy storage applications. Additionally, the study reveals that adding GnP does not modify the β phase of PVDF, ensuring the stability and compatibility of composite. Impedance analysis further highlights the dominance of grain boundary resistance, providing deeper insights into the electrical properties of the composite. This study contributes to a deeper understanding of GnP nanostructure and highlights their prospective use in cutting-edge nanotechnologies, especially in energy storage systems and high-density magnetic data recording. Current research is anticipated to further optimize the material for wider technological application. © 2025

关键词： Conductivity Dielectric Energy storage Polarization

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Rapid TAURUS for relaxation-based color magnetic particle imaging

arXiv

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arXiv 2021年

作者： Arslan, Tunç Alper Özaslan, A. Kurt, Semih Muslu, Yavuz Saritas, Emine Ulku Department of Electrical and Electronics Engineering Bilkent University Ankara06800 Turkey Bilkent University Ankara06800 Turkey Neuroscience Program Sabuncu Brain Research Center Bilkent University Ankara06800 Turkey Department of Biomedical Engineering University of Wisconsin-Madison MadisonWI United States Department of Radiology University of Wisconsin-Madison MadisonWI United States Department of Electrical Engineering and Computer Science KTH Royal Institute of Technology Stockholm Sweden Science for Life Laboratory Stockholm Sweden

Magnetic particle imaging (MPI) is a rapidly developing medical imaging modality that exploits the non-linear response of magnetic nanoparticles (MNPs). Color MPI widens the functionality of MPI, empowering it with the capability to distinguish different MNPs and/or MNP environments. The system function approach for color MPI relies on extensive calibrations that capture the differences in the harmonic responses of the MNPs. An alternative calibration-free x-space-based method called TAURUS estimates a map of the relaxation time constant, τ, by recovering the underlying mirror symmetry in the MPI signal. However, TAURUS requires a back and forth scanning of a given region, restricting its usage to slow trajectories with constant or piecewise constant focus fields (FFs). In this work, we propose a novel technique to increase the performance of TAURUS and enable τ map estimation for rapid and multi-dimensional trajectories. The proposed technique is based on correcting the distortions on mirror symmetry induced by time-varying FFs. We demonstrate via simulations and experiments in our in-house MPI scanner that the proposed method successfully estimates high-fidelity τ maps for rapid trajectories that provide orders of magnitude reduction in scanning time, while preserving the calibration-free property of TAURUS. Copyright © 2021, The Authors. All rights reserved.

关键词： Trajectories

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A Two-stage Reconfiguration in Network Function Virtualization: Toward Service Function Chain Optimization

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IEEE Transactions on Network and Service Management 2025年

作者： Assis, Karcius D. R. Almeida, Raul C. Baghban, Hojjat Santos, Alex F. Boutaba, Raouf Electrical and Computer Engineering Department Salvador Brazil University of Waterloo David R. Cheriton School of Computer Science Canada Department of Electronics and Systems Recife Brazil Chang Gung University Department of Artificial Intelligence Taiwan Chang Gung University College of Intelligent Computing Taiwan Center of Science and Technology in Energy and Sustainability Brazil Postgraduate Program in Computer Science Bahia Brazil

Network Function Virtualization (NFV), as a promising paradigm, speeds up the service deployment by separating network functions from proprietary devices and deploying them on common servers in the form of software. Any service in NFV-enabled networks is achieved as a Service Function Chain (SFC) which consists of a series of ordered Virtual Network Functions (VNFs). However, migration of VNFs for more flexible services within a dynamic NFV-enabled network is a key challenge to be addressed. Current VNF migration studies mainly focus on single VNF migration decisions without considering the sharing and concurrent migration of VNF instances. In this paper, we assume that each deployed VNF is used by multiple SFCs and deal with the optimal placement for the contemporaneous migration of VNFs based on the actual network situation. We formalize the VNF migration and SFC reconfiguration problem as a mathematical model, which aims to minimize the VNF migration between nodes or the total number of core changes per node. The approach is a two-stage MILP based on optimal order to solve the reconfiguration. Extensive evaluation shows that the proposed approach can reduce the change in terms of location or number of cores per node in a 6-node and 14-node networks while ensuring network latency compared with the model without reconfiguration. © 2004-2012 IEEE.

关键词： Network function virtualization

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P200 and N400 Induced Aesthetic Quality Assessment of an Actor Using Type-2 Fuzzy Reasoning

P200 and N400 Induced Aesthetic Quality Assessment of an Act...

引用

IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： Mousumi Laha Amit Konar Madhuparna Das Chandrima Debnath Nandita Sengupta Atulya K. Nagar Electronics & Telecommunication Engineering Department Jadavpur University India Head of Information Technology Program University College of Bahrain Kingdom of Bahrain Department of Math and Computer Science Liverpool Hope University Liverpool UK

ISBN: (数字)9781728169323

ISBN: (纸本)9781728169330

The paper introduces a novel technique for aesthetic quality assessment of an actor from her/his audio-visual clips using the acquired P200 and N400 EEG-responses of the experimental subjects. The P200 signal responds with high amplitude when the subject experiences a non-beautiful stimulus, whereas the N400 signal offers a high negativity for good tonal quality of the actor in the audio-visual stimulus. The synergy of small P200 amplitude and large N400 negativity jointly indicates good aesthetic quality of the actor present in the audio-visual stimulus. The intra/inter-subjective variations in the assessment of aesthetic quality are resolved using a General Type-2 Fuzzy Reasoning. The novelty of the present research lies in the design of the General Type-2 Fuzzy Reasoning algorithm for assessment of aesthetic quality from the measurement of peak power and total power in the selected band of the above two signals. Experiments undertaken confirm that the proposed technique outperforms the state-of-the art techniques when realized for the present application. Finally, the top-ranking stimuli are identified based on the average score of the aesthetic quality of the stimuli assessed by 30 subjects. The top-ranking stimuli may be utilized for psychological nourishment of mentally-challenged people. Statistical technique undertaken confirms the superiority of the proposed technique with its competitors.

关键词： Fuzzy reasoning Fuzzy sets Uncertainty Cognition Quality assessment Linguistics Electroencephalography

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Improving dye-sensitized solar cell longevity: An aerogel encapsulation approach

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Journal of the Taiwan Institute of Chemical Engineers 2025年 174卷

作者： Mahalingam, Savisha Manap, Abreeza Lau, Kam Sheng Floresyona, Dita Chia, Chin Hua Afandi, Nurfanizan Chelvanathan, Puvaneswaran Arith, Faiz Nugroho, Agung Institute of Sustainable Energy Universiti Tenaga Nasional Jalan IKRAM-UNITEN Selangor Kajang43000 Malaysia Materials Science Program Faculty of Science and Technology Universiti Kebangsaan Malaysia Selangor Bangi43600 Malaysia Department of Chemical Engineering Faculty of Industrial Technology Universitas Pertamina Jalan Teuku Nyak Arief Simprug Kebayoran Lama Jakarta 12220 Indonesia Department of Mechanical Engineering College of Engineering Universiti Tenaga Nasional Jalan IKRAM-UNITEN Kajang43000 Malaysia Universiti Kebangsaan Malaysia Selangor Bangi43600 Malaysia Faculty of Electronics and Computer Technology and Engineering Universiti Teknikal Malaysia Melaka Hang Tuah Jaya Durian Tunggal Melaka 76100 Malaysia

The primary challenge in dye-sensitized solar cells (DSSCs) is electrolyte leakage, compromising long-term stability and performance. Alternative electrolytes and encapsulation strategies have been explored to address this. In this study, we propose using nitrogen, fluorine, and sulfur-doped reduced graphene oxide (NSF-rGO) aerogel as an electrolyte encapsulator within DSSCs. The NSF-rGO aerogel was synthesized using a one-pot hydrothermal technique and serves to trap the liquid electrolyte, enhancing cell stability while maintaining conductivity. Although the initial power conversion efficiency of the NSF-rGO-based DSSC was lower than that of the conventional DSSC, it demonstrated significantly improved long-term stability. After two years, the efficiency drop in the NSF-rGO encapsulated DSSC was notably less than in the conventional design, indicating effective electrolyte retention and resistance to degradation. These results suggest that NSF-rGO aerogel encapsulation is a promising strategy for extending the operational lifespan of DSSCs and contributing to more sustainable energy solutions. © 2025 Taiwan Institute of Chemical Engineers

关键词： Proton conductivity

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Plasma-Derived Nanoclusters for Site-Specific Multimodality Photo/Magnetic Thrombus Theranostics

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Advanced Healthcare Materials 2023年第28期12卷 e2301504页

作者： Liu, Chia-Hung Liu, Ming-Che Jheng, Pei-Ru Yu, Jiashing Fan, Yu-Jui Liang, Jia-Wei Hsiao, Yu-Cheng Chiang, Chih-Wei Bolouki, Nima Lee, Jyh-Wei Hsieh, Jang-Hsing Mansel, Bradley W Chen, Yan-Ting Nguyen, Hieu Trung Chuang, Er-Yuan Department of Urology School of Medicine College of Medicine Taipei Medical University 250 Wu-Hsing Street Taipei11031 Taiwan TMU Research Center of Urology and Kidney Taipei Medical University 250 Wu-Hsing Street Taipei11031 Taiwan Department of Urology Shuang Ho Hospital Taipei Medical University 291 Zhongzheng Road Zhonghe District New Taipei City23561 Taiwan Clinical Research Center Taipei Medical University Hospital Taipei11031 Taiwan School of Dental Technology College of Oral Medicine Taipei Medical University Taipei11031 Taiwan Graduate Institute of Biomedical Materials and Tissue Engineering International Ph.D. Program in Biomedical Engineering Graduate Institute of Biomedical Optomechatronics School of Biomedical Engineering Research Center of Biomedical Device Innovation Entrepreneurship Education Center College of Interdisciplinary Studies Taipei Medical University Taipei11031 Taiwan Department of Chemical Engineering College of Engineering National Taiwan University Taipei106 Taiwan Department of Orthopedics Taipei Medical University Taipei11031 Taiwan Department of Orthopedics Taipei Medical University Hospital Taipei11031 Taiwan Department of Physical Electronics Faculty of Science Masaryk University Brno60177 Czech Republic Department of Materials Engineering Ming Chi University of Technology New Taipei City24301 Taiwan Center for Plasma and Thin Film Technologies Ming Chi University of Technology New Taipei City24301 Taiwan National Synchrotron Radiation Research Center Hsinchu Science Park Hsinchu30076 Taiwan Department of Orthopedics and Trauma Faculty of Medicine University of Medicine and Pharmacy at Ho Chi Minh City Ho Chi Minh City700000 Viet Nam Cell Physiology and Molecular Image Research Center Taipei Medical University Wan Fang Hospital Taipei11696 Taiwan Precision Medicine and Translational Cancer Research Center Taipei Medical University Hospital Taipei11031 Taiwan

Traditional thrombolytic therapeutics for vascular blockage are affected by their limited penetration into thrombi, associated off-target side effects, and low bioavailability, leading to insufficient thrombolytic efficacy. It is hypothesized that these limitations can be overcome by the precisely controlled and targeted delivery of thrombolytic therapeutics. A theranostic platform is developed that is biocompatible, fluorescent, magnetic, and well-characterized, with multiple targeting modes. This multimodal theranostic system can be remotely visualized and magnetically guided toward thrombi, noninvasively irradiated by near-infrared (NIR) phototherapies, and remotely activated by actuated magnets for additional mechanical therapy. Magnetic guidance can also improve the penetration of nanomedicines into thrombi. In a mouse model of thrombosis, the thrombosis residues are reduced by ≈80% and with no risk of side effects or of secondary embolization. This strategy not only enables the progression of thrombolysis but also accelerates the lysis rate, thereby facilitating its prospective use in time-critical thrombolytic treatment. © 2023 Wiley-VCH GmbH.

关键词： Diseases

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Multi-Partitioned Software Defined Radio Transceiver Based on Dynamic Partial Reconfiguration

Multi-Partitioned Software Defined Radio Transceiver Based o...

引用

IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Sherif Hosny Eslam Elnader Mostafa Gamal Abdelrhman Hussien Hassan Mostafa Mentor Graphics Electronics and Communications Engineering Department Cairo University Egypt University of Science and technology Nanotechnology and Nanoelectronics Program Zewail City of Science and Technology October Gardens 6th of October Giza 12578 Egypt

ISBN: (数字)9781728133201

ISBN: (纸本)9781728133218

Dynamic Partial Reconfiguration (DPR) proved itself for the implementation of multi-standard Software Defined Radio (SDR). Over the past few years, wireless communication standards witnessed great and rapid evolution. The market is always acquiring higher data rates and more special services. This leads to increase of design complexity, area, and power consumption. Deploying DPR technology on Field programmable Gate Arrays (FPGAs) made it feasible to design and manufacture all wireless communications standards on the same hardware. Loading each standard on demand reduces area and power consumption. This work implements SDR transceiver system for five wireless communication standards: Bluetooth, Wi-Fi, 2G, 3G, and LTE on Zynq-7000 evaluation kit. A new partitioning approach is deployed to achieve best performance for all transceivers. The new approach proves its ability to reduce the allocated area and power consumption for all chains. Power reduction for 2G and Bluetooth is 98.43%, for 3G and Wi-Fi is 79.69%, for LTE is 50.09% compared with no DPR approach.

关键词： Switches Field programmable gate arrays 3G mobile communication Bluetooth Wireless fidelity Transmitters

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Enabling the 5G: Modelling and Design of High Q Film Bulk Acoustic Wave Resonator (FBAR) for High Frequency Applications

Enabling the 5G: Modelling and Design of High Q Film Bulk Ac...

引用

IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Nourhan Ashraf Yasmin Mesbah Aya Emad Hassan Mostafa University of Science and technology Nanotechnology and Nanoelectronics Program Zewail City of Science and Technology October Gardens 6th of October Giza 12578 Egypt Electronics and Communication Engineering Department Cairo University Giza 12613 Egypt

ISBN: (数字)9781728133201

ISBN: (纸本)9781728133218

Micro-electromechanical systems (MEMs) started to dominate the interests of the industry due to the high growth of the various radio frequency (RF) systems, such as mobile telecommunication, satellite communication and other wireless devices that accrues high frequency range. In addition to the race of miniaturizing the device feature size. However, the main obstacle of enabling such devices is that not all of the MEMS technologies are compatible with integrated circuits (IC) manufacturing process. MEMs' devices that are based on acoustics waves like surface acoustic wave (SAW) and bulk acoustic wave (BAW) overcome aforementioned limitations while providing an outstanding performance. BAW resonator is a new technology raised during the last decade which shows better temperature stability compared to SAW, better selectivity, IC manufacturing process compatibility, and lower insertion loss. Filters based on BAWs show very promising results as well. However, BAW resonators still need optimization to achieve the high-quality factor also the temperature dependency is still a big problem. A novel Thin Film bulk acoustic resonator (FBAR) design is presented in this paper using aluminum nitride (AlN) as peizoelectric material and Tungsten (W) for the electrodes, with detailed electrical model and FEM simulations using COMSOL MULTIPHYSICS. In addition, Cadence Virtuoso is used to implement and simulate the electrical model. A resonance frequency of 2.4 GHZ is achieved with quality factor (QF) of 1548 and Temperature coefficient of frequency (TCF) ∼ 4.6 (ppm/ oC).

关键词： Resonant frequency Electrodes Acoustic waves Film bulk acoustic resonators Integrated circuit modeling Q-factor

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Wind energy electret-based electrostatic harvester 21

Wind energy electret-based electrostatic harvester

引用

21st European Conference on Power electronics and Applications, EPE 2019 ECCE Europe

作者： Coronado, Daniel Augusto Castellanos Romano, Emanuele Dallago, Enrico Juan de Castellanos University Foundation School of Engineering and Basic Sciences Research Group in Science Innovation and Technology Electronic Engineering Program Tunja Colombia University of Pavia Power Electronics Laboratory Department of Electrical Computer and Biomedical Engineering Pavia Italy

ISBN: (纸本)9789075815313

In this paper an electret-based electrostatic induction wind harvester is presented. The induction electrostatic field is produced with an electret. It is described how the electret and the harvester prototype have been obtained. A complete electrical characterization of the harvester and experimental results are then reported. © 2019 EPE Association.

关键词： Wind power

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Single-molecule localization microscopy reveals the ultrastructural constitution of distal appendages in expanded mammalian centrioles

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Nature communications 2023年第1期14卷 1688页

作者： Ting-Jui Ben Chang Jimmy Ching-Cheng Hsu T Tony Yang Department of Physics National Taiwan University Taipei Taiwan. Department of Electrical Engineering National Taiwan University Taipei Taiwan. Nano Science and Technology Program Taiwan International Graduate Program Academia Sinica and National Taiwan University Taipei Taiwan. Department of Electrical Engineering National Taiwan University Taipei Taiwan. tonyyang@ntu.edu.tw. Graduate Institute of Biomedical Electronics and Bioinformatics National Taiwan University Taipei Taiwan. tonyyang@ntu.edu.tw.

Distal appendages (DAPs) are vital in cilia formation, mediating vesicular and ciliary docking to the plasma membrane during early ciliogenesis. Although numerous DAP proteins arranging a nine-fold symmetry have been studied using superresolution microscopy analyses, the extensive ultrastructural understanding of the DAP structure developing from the centriole wall remains elusive owing to insufficient resolution. Here, we proposed a pragmatic imaging strategy for two-color single-molecule localization microscopy of expanded mammalian DAP. Importantly, our imaging workflow enables us to push the resolution limit of a light microscope well close to a molecular level, thus achieving an unprecedented mapping resolution inside intact cells. Upon this workflow, we unravel the ultra-resolved higher-order protein complexes of the DAP and its associated proteins. Intriguingly, our images show that C2CD3, microtubule triplet, MNR, CEP90, OFD1, and ODF2 jointly constitute a unique molecular configuration at the DAP base. Moreover, our finding suggests that ODF2 plays an auxiliary role in coordinating and maintaining DAP nine-fold symmetry. Together, we develop an organelle-based drift correction protocol and a two-color solution with minimum crosstalk, allowing a robust localization microscopy imaging of expanded DAP structures deep into the gel-specimen composites.

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