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Telecommunications Forum (TELFOR)

作者： Branko Malešević Aleksandra Rosić Bojan Banjac Miloš Mićović Department of Applied Mathematics School of Electrical Engineering University of Belgrade Belgrade Serbia Department of Algebra and Mathematical Logic Faculty of Mathematics University of Belgrade Belgrade Serbia Computer Graphics Chair Faculty of Technical Sciences University of Novi Sad Novi Sad Serbia Intens DOO Novi Sad Serbia Department of Applied Mathematics Science and Research Centre School of Electrical Engineering University of Belgrade Belgrade Serbia

ISBN: (数字)9798350391060

ISBN: (纸本)9798350391077

In this paper, the correctness of the algebraic determination of the coordinate of the third focus of the Cartesian oval is examined and analysed. This analysis is necessary because the process includes solving systems with a large number of multivariate polynomial equations using the computer algebra system Maple. The paper also considers the difficulties and limitations of using computers in determining the coordinate of the third focus.

关键词： Geometry Computer science Algebra Optics Polynomials Mathematical models Telecommunications

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Salacca zalacca extract's antiaging effect on aging genes, protein levels, and apoptosis in UV-induced fibroblast cells

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Journal of Taibah University Medical Sciences 2025年第3期20卷 349-358页

作者： Widowati, Wahyu Dani, Dani Vera, Vera Wargasetia, Teresa L. Rahardja, Fanny Tih, Fen Onggowidjaja, Philips Tjokropranoto, Rita Zahiroh, Fadhilah H. Azis, Rizal Priyandoko, Didik Surakusumah, Wahyu Hadiprasetyo, Dhanar S. Faculty of Medicine Maranatha Christian University West Java Bandung Indonesia Bimolecular and Biomedical Research Center Aretha Medika Utama West Java Bandung Indonesia Biomedical Engineering Department of Electrical Engineering Faculty of Engineering Universitas Indonesia West Java Depok Indonesia Biology Study Program Faculty of Mathematics and Science Education Universitas Pendidikan Indonesia West Java Bandung Indonesia Faculty of Pharmacy Universitas Jenderal Achmad Yani West Java Cimahi Indonesia

Objectives: Ultraviolet (UV) exposure can hasten the aging process of the skin. The use of chemicals for anti-aging has long-term adverse effects. The natural ingredients of snake fruit (Salacca zalacca L.) are known to have bioactive properties such as polyphenols, flavonoids, chlorogenic acid, and caffeic acid which have antiaging potential. The study aims to ascertain the potential of S. zalacca Extract (SZE) as an antiaging agent by in vitro assay. Methods: The SZE compound content was analyzed by LC-MS/MS. SZE viability test on human skin fibroblast (BJ) cells was carried out using the WST assay. BJ cells were UV-induced as a cell model of premature aging. SZE 6.25, 12.5, and 25 μg/mL were administered to UV-induced BJ cells. The gene expression of COL1A1, MMP-1, FGF-2, and GPX-1 were analyzed by quantitative Real-Time PCR. Elastin (ELN), Hyaluronidase (HAse), Cyclooxigenase-2 (COX-2), 8-Hydroxydeoxyguanosine (8-OHdG), and Melatonin (MT) protein levels were analyzed by ELISA assay. The apoptosis of BJ cells was analyzed using flow cytometry. One-way ANOVA in SPSS Software was used for statistical analysis. Results: Treatment with SZE increased COL1A1, FGF-2, and GPX-1 gene expression and also decreased MMP-1 gene expression. SZE also increased ELN and MT levels in UV-induced BJ cells. After SZE treatment, the protein levels of HAse, COX-2, and 8-OHdG decreased compared to the positive control. SZE also succeeded in maintaining the lives of BJ cells and reducing apoptosis in BJ cells. Conclusions: SZE has the potential to be an antiaging agent by in vitro assay. © 2025 The Authors

关键词： Antiaging Antioxidant Chlorogenic acid Salacca zalacca Ultraviolet

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A Reconfigurable Compute-In-Memory Design with Adaptive Bit-Precision and Power Adjustment

A Reconfigurable Compute-In-Memory Design with Adaptive Bit-...

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Consumer Technology (ICCT-Pacific), International Conference on

作者： I-Chieh Hsu Chun-Fu Chen Dao-Long Huang Yun-Kai Yeh Wei-Chieh Lee Qi-Hua Lin Jinjia Zhou I-Chyn Wey Electrical Engineering Department College of Engineering Chang-Gung University Taiwan School of Electrical Engineering National Taiwan University of Science and Technology Taiwan Master Program in Nano-Electronic Engineering and Design Chang Gung University Taiwan Department of Applied Informatics Faculty of Science and Engineering Hosei University Japan

ISBN: (数字)9798331504120

ISBN: (纸本)9798331504137

With the successful development of artificial intelligence (AI), Convolutional Neural Networks (CNNs) occupy a large amount of computing time and power consumption in the entire AI computing process. However, in traditional von Neumann architectures, the separation of the computing element and memory leads to the memory-wall problem of memory data transmission bandwidth from memory to processing element when executing multiply-accumulate-based CNN operations. The data transmission time and power consumption all are much higher than the CNN computing part. Therefore, this paper proposes a memory-in-computation design that can flexibly adjust energy usage, achieve high energy efficiency, and support multiple operation frequencies. By controlling the switches of each memory row, unnecessary energy consumption is avoided, leading to a reduction in total power consumption by 15% to 60%. Additionally, by adjusting the pulse width, the charging power consumption of capacitors is reduced by 65% per charge cycle.

关键词： Energy consumption Power demand Capacitors Bandwidth In-memory computing Control systems Energy efficiency Convolutional neural networks Data communication Artificial intelligence

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A numerical approach to Cattaneo–Christov heat flux in MHD Oldroyd-B fluids with tri-nanoparticle suspension

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International Journal of Ambient Energy 2025年第1期46卷

作者： Lakshmi, K. Bhanu Gangadhar, Kotha Vinodh Kumar, Pallamkuppam Dinarvand, Saeed Naga Bhargavi, D. Venkata Subba Rao, M. Mylavaram India Department of Mathematics Acharya Nagarjuna University Campus Ongole India Department of Electrical and Electronics Engineering Sanskrithi School of Engineering Puttaparthi India Mechanical Engineering Department Central Tehran Branch Islamic Azad University Tehran Iran Department of Mathematics Vignan’s NirulaInstitute of Technology and Science for Women Guntur India Department of Mathematics and Statistics School of Applied Sciences and Humanities Vignan’s Foundation for Science Technology and Research Vadlamudi India

This study examines the impact of multi-nanoparticles on entropy generation in blood-based nanofluids, employing the Cattaneo-Christov heat flux model to analyse heat transfer dynamics. The nanofluids consist of gold (Au), silver (Ag), and zinc (Zn) nanoparticles dispersed in blood. The findings indicate that momentum relaxation time significantly influences entropy generation, with Au-containing blood nanofluids exhibiting the lowest entropy generation compared to those with Ag and Zn nanoparticles. Additionally, blood-based nanofluids with tri-nanoparticles experience the highest wall shear stresses, indicating superior flow characteristics. The study utilises the bvp4c technique to solve the boundary value problem, ensuring accurate and efficient computational results. These blood-based nanofluids hold significant potential in medical engineering, particularly for targeted drug delivery and hyperthermia treatments for cancer, where precise thermal control is crucial. Their unique properties may enhance heat transfer efficiency, improving cancer treatment methods. Furthermore, the findings suggest potential applications in advanced cooling systems for electronic devices, enhancing thermal management in high-performance computing and aerospace. From the present study some of the main observations are, to minimise entropy generation in critical applications, it is advisable to avoid fluids with Oldroyd-B behaviour, instead opting for non-heat-generating or heat-absorbing nanofluids to enhance thermal process efficiency. © 2025 Informa UK Limited, trading as Taylor & Francis Group.

关键词： Absorption cooling

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Behind-the-Meter Disaggregation of Residential Electric Vehicle Charging Load

Behind-the-Meter Disaggregation of Residential Electric Vehi...

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2022 IEEE International Conference on Communications, Control, and Computing Technologies for Smart Grids, SmartGridComm 2022

作者： Pu, Kang Zhao, Yue Stony Brook University Department of Applied Mathematics and Statistics Stony BrookNY11794 United States Stony Brook University Department of Electrical and Computer Engineering Stony BrookNY11794 United States

ISBN: (数字)9781665432542

ISBN: (纸本)9781665432542

With the rapidly evolving penetration of electric vehicles (EVs) in power distribution systems, a major issue that utilities face is the lack of visibility into the charging behaviors of the behind-the-meter (BTM) EVs. Knowing the BTM EV charging behaviors can greatly enhance utilities' system planning and operation efficacy. In this paper, the problem of disaggregating BTM EV load traces from smart meter data traces is studied. Based on the characteristics of typical EV charging traces, three interdependent sub-problems are formulated: a) Detecting the presence of BTM EVs, b) Estimating the EV charging rate, and c) Detecting the EV charging periods. A unified iterative algorithmic framework is developed to solve all three sub-problems. Importantly, the proposed algorithms do not assume or utilize the knowledge of ground truth EV load traces but estimate BTM EV load traces in an 'unsupervised' fashion. Numerical evaluation is conducted based on real-world 15-minute interval smart meter data from Austin, TX, and demonstrates great performance achieved by the proposed algorithms. © 2022 IEEE.

关键词： Iterative methods

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A SHORT PROOF OF ISSERLIS’ THEOREM

arXiv

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arXiv 2025年

作者： Munthe-Kaas, Hans Z. Verdier, Olivier Vilmart, Gilles Department of Mathematics and Statistics UiT – The Arctic University of Norway Tromsø Norway Department of Mathematics University of Bergen Bergen Norway Department of Computing Electrical Engineering and Mathematical Sciences Western Norway Norway University of Applied Sciences Bergen Norway Section of Mathematics University of Geneva Switzerland

We show that Isserlis’ theorem follows as a corollary to the invariant tensor theorem for isotropic *** Codes Primary: 60C05, 15A72, Secondary: 41A58, 60H35 Copyright © 2025, The Authors. All rights reserved.

关键词： Tensors

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Noise impact of classical headers on the quantum payload in quantum wrapper networking

Optica Quantum

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Optica Quantum 2025年第3期3卷 303-311页

作者： Gamze Gül Gregory S Kanter Shannon G Tan Mehmet Berkay On Roberto Proietti S J Ben Yoo Prem Kumar Graduate Program in Applied Physics Northwestern University Evanston Illinois 60208 USA Center for Photonic Communication and Computing Department of Electrical and Computer Engineering Northwestern University Evanston Illinois 60208 USA Department of Electrical and Computer Engineering University of California Davis Davis California 95616 USA Department of Electronics and Telecommunications Engineering Politecnico di Torino Italy kumarp@northwestern.edu

The fundamental properties of quantum mechanics, such as the no-cloning theorem, make management and control of quantum networks challenging. Quantum wrapper networking (QWN) offers a solution to this problem by wrapping quantum payloads with classical bits (as headers and/or tails) that can be used to assist with networking, performance monitoring, and probing the properties of the fiber interconnection. Since the classical header and quantum payload travel in the same fiber, one should carefully design the system to mitigate potentially deleterious effects such as noise and cross-talk. In this paper, we identify and characterize the noise induced by the classical headers by in-fiber scattering processes. We study the noise by using a tunable continuous-wave laser to emulate O-band (∼1310 nm) classical headers, which are time- and wavelength-multiplexed with O-band quantum signals. The noise is characterized as a function of the headers’ power, classical-quantum wavelength detuning, and optical fiber length. We demonstrate that the dominant noise contribution originates from spontaneous Raman scattering for wavelength detunings that are larger than 3 nm. We also observe that some noise photons can bleed into the quantum payload due to Rayleigh scattering of backward Raman scattered photons. We further investigate system level impacts of the noise created by classical headers that are produced by employing a small form-factor pluggable transceiver. We demonstrate that the associated noise level has negligible impact on quantum payloads for a 47.8 km deployed fiber link, the longest length used in QWN experiments to date, achieving a coincidences-to-accidentals ratio of 56 and a two-photon interference visibility of 88.8%.

关键词： Quantum computation Quantum information Quantum key distribution Raman scattering Systems design Wavelength division multiplexing

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Integrity of Cyber-Physical Discrete Event Systems under covert actuator attacks

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IFAC-PapersOnLine 2024年第1期58卷 198-203页

作者： Samuel Oliveira André B. Leal Marcelo Teixeira Yuri K. Lopes Department of Exact and Technological Sciences Federal University of Amapá (UNIFAP) Macapá/AP Brazil Graduate Program in Electrical Engineering Santa Catarina State University (UDESC) Joinville/SC Brazil Graduate Program in Electrical Engineering Federal University of Technology (UTFPR) Pato Branco/PR Brazil Graduate Program in Applied Computing Santa Catarina State University (UDESC) Joinville/SC Brazil

The connectivity requirements brought by Industry 4.0 pose new challenges for cyber-physical systems (CPS), such as the strengthening of their resilience against cyberattacks. In this paper, we use the discrete event systems (DES) formalism to develop an approach that aims to protect CPS from covert actuator attacks using event permutation maps. In this approach, properly selected controllable events are permuted on the plant's site so that attacks on actuators do not have the impact on the plant as expected by the intruder and unsafe states are avoided. Furthermore, a property termed AE-protectability is presented to characterize the necessary and sufficient conditions for the system to be protected against such attacks through event permutations. The proposed approach is applied to a case study where the Identification of the attack is done without causing damage while maintaining the integrity of the system.

关键词： Cyber-security Supervisory Control Theory Diagnosis

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Convergence of Graph Neural Networks on Relatively Sparse Graphs

Convergence of Graph Neural Networks on Relatively Sparse Gr...

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Asilomar Conference on Signals, Systems & Computers

作者： Zhiyang Wang Luana Ruiz Alejandro Ribeiro Department of Electrical and Systems Engineering University of Pennsylvania PA USA Department of Applied Mathematics and Statistics Johns Hopkins University MD USA

In this paper we study the connection between graph filters, graph neural networks (GNNs) and manifold filters, manifold neural networks (MNNs), Specifically, we consider the case when we have access to a set of uniformly sampled points from the manifold based on which we construct a relatively sparse graph to approximate the manifold, which is a suitable model for many real world applications. We prove a non-asymptotic approximation error bound or convergence rate for the graph filters and the GNNs on the relatively sparse graphs to the filters and neural networks on the manifold that the graphs are sampled from. An interesting trade-off between the convergence and the discriminability of the graph filters can be observed from the non-asymptotic error bound which indicates that graph filters cannot give good convergence and discriminability at the same time. While the nonlinearity function in GNNs can alleviate this trade-off and allows the GNNs to both converge to the MNNs and discriminate well. Equipped with this non-asymptotic error bound, we further interpret the transferability property of GNNs when the graphs are sampled from a common manifold. We verify our conclusions with a point-cloud classification problem.

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Vision-Based Estimation of Cable Slab Forces in Precision Motion Applications 63

Vision-Based Estimation of Cable Slab Forces in Precision Mo...

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63rd IEEE Conference on Decision and Control, CDC 2024

作者： Al-Rawashdeh, Yazan M. Saaideh, Mohammad Al Pumphrey, Michael Alatawneh, Natheer Janaideh, Mohammad Al Al-Zaytoonah University of Jordan Department of Electrical Eng Amman130 11733 Jordan Memorial University Department of Mechanical and Mechatronics Engineering St. John'sNL A1B 3X5 Canada University of Guelph School of Engineering GuelphONN1G 2W1 Canada Czech Technical University Department of Applied Mathematics Prague Czech Republic

ISBN: (纸本)9798350316339

In this study, a novel method for estimating the cable slab internal and reaction forces is presented. Using visual feedback comprising a high-speed camera, the cable slab responses due to cyclic and acyclic motion profiles are recorded, and the positions of a sufficient finite set of markers attached to the cable slab are extracted off-line using image processing. The kinematics of the markers are obtained via numerical differentiation and signal processing. Adopting the Voigt viscoelastic model, the cable slab is segmented into several lumped mass-spring-damper elements whose linear and angular motions are expressed analytically. Using the strain and its rate of change during motion, estimates of internal and reaction forces are written as functions of the cable slab composite material properties that are identified by manual tuning. The link between these forces and the motion system kinematics reveals the tuning process of a proposed fixed-parameter feedforward/feedback controller/compensator that can be used to enhance the precision of the motion system despite its simplicity. The experimental results reveal the effectiveness of the proposed approach. © 2024 IEEE.

关键词： High speed cameras

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