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Radio science Meeting (AT-AP-RASC), URSI Atlantic and Asia Pacific

作者： Syed Naheel Raza Rizvi Abir Zaidi Mohammad Alibakhshikenari Mariana Dalarsson Shah Nawaz Burokur Department of Information and Communication Engineering Chungbuk National University Cheongju South Korea Department of Electrical Engineering Faculty of Science and Techniques Hassan II University Casablanca Morocco Department of Signal Theory and Communications Universidad Carlos III de Madrid Legan&#x00E9 s Madrid Spain School of Electrical Engineering and Computer Science KTH Royal Institute of Technology Stockholm Sweden LEME UPL University Paris Nanterre Ville d&#x2019 Avray France

In this paper, a compact, geometrically simple, dual band and high gain coplanar waveguide (CPW) fed antenna for WLAN and X-band is proposed. The antenna is designed on Rogers RT/Duroid 5880 substrate with overall size of 25 mm × 33 mm × 0.79 mm. The proposed antenna consists of circular and rectangular stubs with one rectangular slot. The stubs and slots are introduced in order to achieve the desired bandwidth and high gain. The proposed antenna is designed and analyzed using the electromagnetic (EM) tool HFSS. Moreover, the proposed antenna design is compared to previously published work, and the comparison shows that our proposed antenna is a good candidate for radar applications.

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Different solitary wave solutions and bilinear form for modified mixed-KDV equation

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Optik 2023年第1期287卷

作者： Zil-E-Huma Butt, Asma Rashid Raza, Nauman Ahmad, Hijaz Ozsahin, Dilber Uzun Tchier, Fairouz Department of Mathematics University of Engineering and Technology Lahore Pakistan Department of Mathematics University of the Punjab Quaid-e-Azam Campus Lahore Pakistan Near East University Operational Research Center in Healthcare TRNC Mersin 10 Nicosia99138 Turkey Department of Computer Science and Mathematics Lebanese American University Beirut Lebanon Section of Mathematics International Telematic University Uninettuno Corso Vittorio Emanuele II 39 Roma00186 Italy Department of Medical Diagnostic Imaging College of Health Science University of Sharjah Sharjah United Arab Emirates Research Institute for Medical and Health Sciences University of Sharjah Sharjah United Arab Emirates Department of mathematics College of science King Saud University P.O. Box 2455 Riyadh11451 Saudi Arabia

This study we handled (1+1)-dimensional modified-mixed KDV (mmKdV) equation for unique soliton solutions. For this purpose Firstly, auto-Bäcklund and Cole-Hopf transformations are created through the homogeneous balance method. Various soliton-like solutions are given by the trigonometric, hyperbolic, and exponential function waves and that leads to the extraction of novel periodic, dark, and bright soliton solutions. Moreover, the bilinear form of the model is found by utilizing the logarithmic transformation. Density, 3-D, and 2-D graphics are displayed to illustrate the dynamics of the acquired solutions. It is determined that the approach employed to obtain analytic solutions to nonlinear partial differential equation is efficient and powerful. © 2023 Elsevier GmbH

关键词： Hyperbolic functions

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Towards a European HPC/AI ecosystem: a community-driven report

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Procedia computer science 2025年 255卷 140-149页

作者： Petr Taborsky Iacopo Colonnelli Krzysztof Kurowski Rakesh Sarma Niels Henrik Pontoppidan Branislav Jansík Nicki Skafte Detlefsen Jens Egholm Pedersen Rasmus Larsen Lars Kai Hansen Technical University of Denmark Anker Engelunds Vej 1 Bygning 101A 2800 Kongens Lyngby Denmark University of Torino Computer Science Dept. Corso Svizzera 185 10149 Torino Italy Poznań Supercomputing and Networking Center Jana Pawła II 10 61-139 Poznań Poland Forschungszentrum Jülich GmbH Jülich Supercomputing Centre Wilhelm-Johnen-Straße 52425 Jülich Germany Eriksholm Research Centre Rørtangvej 20 3070 Snekkersten Denmark IT4Innovations VSB – Technical University of Ostrava Ostrava Czech Republic KTH Royal Institute of Technology Brinellvägen 8 114 28 Stockholm Sweden Alexandra Instituttet Rued Langgaards Vej 7 2300 Copenaghen Denmark

The rapid advancements in AI and Machine Learning necessitate a robust computational infrastructure to support cutting-edge research and industrial applications. From the academic and industrial AI community perspective, voiced in the recent ELISE project, the European AI platform is recommended to center around the EuroHPC growing ecosystem. It should be user-driven, easily accessible, powerful, and compliant with European regulations. AI-optimized and dedicated supercomputers for the European AI community are also coming, in addition to upgrading partitions of existing EuroHPC systems to ’AI enabled’ stage. Related calls have been initiated in September 2024. Further, conventional EuroHPC systems are suggested to be extended with quantum computing, edge AI, and neuromorphic computing to cater to AI models deployed on network edge devices and sustainability in the long run. The challenges are presented in three case studies, ranging from training Transformers on HPC to LLMs trained federally across three different Euro HPC systems to recent results on hybrid classical-quantum application. This paper concludes with case studies results-informed next steps believed to benefit AI practitioners and the broader AI community.

关键词： Artificial Intelligence High-Performance Computing HPC ELISE ELLIS EuroHPC Joint Undertaking Quantum Computing Federated Learning

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On the solitonic wave structures and stability analysis of the stochastic nonlinear Schrödinger equation with the impact of multiplicative noise

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Optik 2023年第1期289卷

作者： Zulfiqar, Hina Aashiq, Aqsa Tariq, Kalim U. Ahmad, Hijaz Almohsen, Bandar Aslam, Muhammad Rehman, Hamood Ur Department of Mathematics University of Okara Okara Punjab56300 Pakistan Government Post Graduate College Okara Pakistan Pakistan Section of Mathematics International Telematic University Uninettuno Corso Vittorio Emanuele II 39 Roma00186 Italy Near East University Operational Research Center in Healthcare Nicosia TRNC Mersin 10PC: 99138 Turkey Department of Computer Science and Mathematics Lebanese American University Beirut Lebanon Department of Mathematics College of Science King Saud University P.O. Box 2455 Riyadh11451 Saudi Arabia Institute of Physics and Technology Ural Federal University Mira Str.19 Yekaterinburg620002 Russia

The nonlinear Schrödinger equation (NLSE) is a fundamental and significant physical model that plays a crucial role in demonstrating the dynamics of optical solitons in the theory optical fibers. The propagation of solitons in nonlinear optical fibers has garnered substantial interest due to its broad spectrum of applications, particularly in ultrafast signal routing systems and short light pulses for communications. This article focuses on investigating the impact of multiplicative noise on the solutions of this governing model. To achieve this, three distinct methods, namely the enhanced modified extended tanh expansion (METE) method, the generalized Kudryashov (GK) approach and the extended modified auxiliary equation mapping (EMAEM) method are employed to obtain a new variety of stochastic solutions. The perception of how noise intensity impacts the transmission of waves is a fundamental and critical issue in various fields. In the context of this study, an equation describes an exact wave pattern under the condition that s (representing noise intensity) equals zero. In such cases, the observed pattern remains undisturbed and matches the expected theoretical wave pattern. However, as the strength of noise s increases, the observed pattern begins to deviate from the ideal wave pattern and exhibits signs of damage or distortion. Furthermore, the stability analysis for the stochastic NLSE is performed, providing valuable insights into the behavior solutions as the strength of multiplicative noise increases. The validation of computational results through stability analysis enhances the confidence in the findings of the study. All the mathematical calculations, as well as graphical representations, have been meticulously achieved to present a comprehensive and detailed understanding of the impact of multiplicative on soliton propagation in nonlinear optical fibers. © 2023 Elsevier GmbH

关键词： Optical fibers

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DFT Study of Se and Te Doped SrTiO 3 for Enhanced Visible-Light Driven Phtocatalytic Hydrogen Production

Research Square

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Research Square 2021年

作者： Bentour, Hakim Boujnah, Mourad Houmad, Mohamed Yadari, Mourad El Benyoussef, Abdelilah Kenz, Abdallah El Faculty of Science Mohammed V University of Rabat P.O.B. 1014 Morocco Institute of Materials Research National Autonomous University of Mexico Mexico City04510 Mexico Research team Theory of Systems and Computer Science Moulay Ismail University Meknes Morocco Institute of Nanomaterials and Nanotechnologies MAScIR Rabat Morocco Hassan II Academy of Science and Technology Rabat Morocco

The pure STiO3 has been experimentally demonstrated to catalyze H2 production using water splitting, but the reaction can only be driven by Ultraviolet (UV) radiation due to the large band gap of SrTiO3. This motivated us to search efficient strategy to tune its band gap, so that it can function in the visible region of the solar spectrum. In this study, the electronic, optical and photocatalytic properties of Se-doped, and Te-doped SrTiO3 has been investigated using density functional theory (DFT) within the generalized gradient approximation (GGA). Our results reveal that the effect of doping can lead to band gap narrowing without introducing any isolated mid-gap states. This improves greatly the visible light activity of SrTiO3 and depresses the recombination of photogenerated electron-hole pairs. Furthermore, the locations of calculated band edges relative to the water reduction and oxidation levels for doped systems meet the water-splitting requirements. Consequently, our results show that the performance of SrTiO3 for hydrogen generation by photocatalytic water splitting is significantly enhanced with Se and Te doping. In particular, Te doping can enhance greatly the visible light photocatalytic activity of SrTiO3. We expect this study can provide a theoretical basis for a prospective experimental works. © 2021, CC BY.

关键词： Density functional theory

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Untangling Circular Drawings: Algorithms and Complexity

arXiv

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arXiv 2021年

作者： Bhore, Sujoy Li, Guangping Nöllenburg, Martin Rutter, Ignaz Wu, Hsiang-Yun Indian Institute of Science Education and Research Bhopal India Algorithms and Complexity Group TU Wien Vienna Austria University of Passau Passau Germany Research Unit of Computer Graphics TU Wien Vienna Austria St. Pölten University of Applied Sciences St. Pölten Austria

We consider the problem of untangling a given (non-planar) straight-line circular drawing δG of an outerplanar graph G = (V, E) into a planar straight-line circular drawing by shifting a minimum number of vertices to a new position on the circle. For an outerplanar graph G, it is clear that such a crossing-free circular drawing always exists and we define the circular shifting number shift◦(δG) as the minimum number of vertices that are required to be shifted in order to resolve all crossings of δG. We show that the problem Circular Untangling, asking whether shift◦(δG) ≤ K for a given integer K, is NP-complete. For n-vertex outerplanar graphs, we obtain a tight upper bound of shift◦(δG) ≤ n − ⌊√n − 2⌋ − 2. Moreover, we study the Circular Untangling for almost-planar circular drawings, in which a single edge is involved in all the crossings. For this problem, we provide a tight upper bound shift◦(δG) ≤ ⌊n/2⌋ − 1 and present a constructive polynomial-time algorithm to compute the circular shifting number of almost-planar drawings. © 2021, CC BY.

关键词： Drawing (graphics)

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Force Field-Based Indirect Manipulation Of UAV Flight Trajectories*

Force Field-Based Indirect Manipulation Of UAV Flight Trajec...

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2019 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)

作者： Werner Alexander Isop Friedrich Fraundorfer Department of Computer Science Institute of Computer Graphics and Vision Graz University of Technology Graz Austria

For a variety of applications remote navigation of an unmanned aerial vehicle (UAV) along a flight trajectory is an essential task. For instance, during search and rescue missions in outdoor scenes, an important goal is to ensure safe navigation. Assessed by the remote operator, this could mean avoiding collisions with obstacles, but moreover avoiding hazardous flight areas. State of the art approaches enable navigation along trajectories, but do not allow for indirect manipulation during motion. In addition, they suggest to use egocentric views which could limit understanding of the remote scene. With this work we introduce a novel indirect manipulation method, based on gravitational law, to recover safe navigation in the presence of hazardous flight areas. The indirect character of our method supports manipulation at far distances where common direct manipulation methods typically fail. We combine it with an immersive exocentric view to improve understanding of the scene. We designed three flavors of our method and compared them during a user study in a simulated scene. While with this method we present a first step towards a more extensive navigation interface, as future work we plan experiments in dynamic real-world scenes.

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The ZTF Source Classification Project: iiI. A Catalog of Variable Sources

arXiv

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arXiv 2023年

作者： Healy, Brian F. Coughlin, Michael W. Mahabal, Ashish A. Laz, Theophile Jegou du Drake, Andrew Graham, Matthew J. Hillenbrand, Lynne A. van Roestel, Jan Szkody, Paula Zielske, LeighAnna Guiga, Mohammed Hassan, Muhammad Yusuf Hughes, Jill L. Nir, Guy Parikh, Saagar Park, Sungmin Purohit, Palak Rebbapragada, Umaa Reed, Draco Warshofsky, Daniel Wold, Avery Bloom, Joshua S. Masci, Frank J. Riddle, Reed Smith, Roger School of Physics and Astronomy University of Minnesota MinneapolisMN55455 United States Division of Physics Mathematics and Astronomy California Institute of Technology PasadenaCA91125 United States Center for Data Driven Discovery California Institute of Technology PasadenaCA91125 United States Department of Astronomy California Institute of Technology PasadenaCA91125 United States Anton Pannekoek Institute for Astronomy University of Amsterdam Amsterdam1090 GE Netherlands Department of Astronomy University of Washington SeattleWA98195 United States Department of Physics Pacific Lutheran University TacomaWA98447 United States Department of Computer Science and Engineering University of Minnesota MinneapolisMN55455 United States Department of Electrical Engineering Indian Institute of Technology Gandhinagar Gujarat 382055 India Department of Astronomy University of California BerkeleyCA94720 United States Lawrence Berkeley National Laboratory 1 Cyclotron Road MS 50B-4206 BerkeleyCA94720 United States Department of Electrical and Computer Engineering Carnegie Mellon University PittsburghPA15213 United States Computer Vision Imaging and Graphics Lab Indian Institute of Technology Gujarat Gandhinagar382055 India School of Statistics University of Minnesota MinneapolisMN55455 United States Division of Engineering and Applied Science California Institute of Technology PasadenaCA91125 United States Jet Propulsion Laboratory California Institute of Technology PasadenaCA91125 United States IPAC California Institute of Technology 1200 E. California Blvd. PasadenaCA91125 United States Caltech Optical Observatories California Institute of Technology PasadenaCA91125 United States

The classification of variable objects provides insight into a wide variety of astrophysics ranging from stellar interiors to galactic nuclei. The Zwicky Transient Facility (ZTF) provides time-series observations that record the variability of more than a billion sources. The scale of these data necessitates automated approaches to make a thorough analysis. Building on previous work, this paper reports the results of the ZTF Source Classification Project (SCoPe), which trains neural network and XGBoost machine-learning (ML) algorithms to perform dichotomous classification of variable ZTF sources using a manually constructed training set containing 170,632 light curves. We find that several classifiers achieve high precision and recall scores, suggesting the reliability of their predictions for 209,991,147 light curves across 77 ZTF fields. We also identify the most important features for XGB classification and compare the performance of the two ML algorithms, finding a pattern of higher precision among XGB classifiers. The resulting classification catalog is available to the public, and the software developed for SCoPe is open-source and adaptable to future time-domain surveys. Copyright © 2023, The Authors. All rights reserved.

关键词： Classification (of information)

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Depth-Awareness in a System for Mixed-Reality Aided Surgical Procedures 15th

Depth-Awareness in a System for Mixed-Reality Aided Surgical...

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15th International Conference on Intelligent Computing, ICIC 2019

作者： Sylos Labini, Mauro Gsaxner, Christina Pepe, Antonio Wallner, Juergen Egger, Jan Bevilacqua, Vitoantonio Institute for Computer Graphics and Vision Faculty of Computer Science and Biomedical Engineering Graz University of Technology Graz Austria Computer Algorithms for Medicine Laboratory Graz Austria Department of Electrical and Information Engineering Polytechnic University of Bari Bari Italy Department of Oral and Maxillofacial Surgery Medical University of Graz Graz Austria

ISBN: (纸本)9783030267650

computer-assisted surgery is a trending topic in research, with many different approaches which aim at supporting surgeons in the operating room. Existing surgical planning and navigation solutions are often considered to be distracting, unintuitive or hard to interpret. In this work, we address this issue with an approach based on mixed reality devices like Microsoft HoloLens. We assess the depth sensing capabilities of Microsoft HoloLens, and the potential benefit they could bring to computer-assisted surgery applications. © 2019, Springer Nature Switzerland AG.

关键词： Mixed reality

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Construction of Lightweight Content key Distribution Framework for DRM systems

Construction of Lightweight Content key Distribution Framewo...

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International Conference on Computing, Communication & Automation (ICCCA)

作者： Dheerendra Mishra Abhijit Kasi Mohammad S. Obaidat Purva Rewal Ankita Mishra Maulana Azad National Institute of Technology Bhopal India Indian Institute of Technology Dhanbad India King Abdullah II School of Information Technology University of Jordan Amman Jordan School of Computer and Communication Engineering University of Science and Technology Beijing Beijing China Govt Nehru PG College Agarmalwa India

ISBN: (纸本)9781665447539

Digital content piracy has become a big challenge after the advancement in network and digital technologies. digital rights management (DRM) systems were introduced to regulate content distribution. Protocols are being designed to ensure secure and efficient communication in DRM systems. Both security and efficiency are important parameters and should travel together. During our analysis, we identified that much efficient content key delivery mechanism fails to achieve desired security parameters. Thus, it is required to work on efficient protocols design. We have worked on the design of the efficiency of the content delivery mechanism without diluting security. The proposed scheme presents an anonymous content key delivery mechanism. We analyze the security of the scheme. We verify the security against replay attacks and man-in-the-middle attacks using the formal verification simulation tool AVISPA, which indicates that the scheme is safe. The analysis of performance is done, which includes the computation cost at the user and server end. The comparative study of performance is also included to identify the improvement at efficiency side.

关键词： Protocols Costs Resists Copyright protection Performance analysis Security Servers

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