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arXiv 2020年

作者： Raoof, Ahmed Lung, Chung-Horng Matrawy, Ashraf Dep. of Systems and Computer Eng Carleton University Canada School of Information Technology Carleton University Canada

As the de facto routing protocol for many Internet of Things (IoT) networks nowadays, and to assure the confidentiality and integrity of its control messages, the Routing Protocol for Low Power and Lossy Networks (RPL) incorporates three modes of security: the Unsecured Mode (UM), Preinstalled Secure Mode (PSM), and the Authenticated Secure Mode (ASM). While the PSM and ASM are intended to protect against external routing attacks and some replay attacks (through an optional replay protection mechanism), recent research showed that RPL in PSM is still vulnerable to many routing attacks, both internal and external. In this paper, we propose a novel secure mode for RPL, the Chained Secure Mode (CSM), based on the concept of intra-flow Network Coding. The goal of CSM is to enhance RPL’s resilience against several routing attacks, with the ability to mitigate some of them. The security and performance of a proof-of-concept prototype of CSM were evaluated and compared against RPL in UM and PSM (with and without the optional replay protection) in the presence of Neighbor attack as an example. It showed that CSM has better performance and more enhanced security compared to the PSM with the replay protection. On the other hand, it showed a need for a proper recovery mechanism for the case of losing a control message. Copyright © 2020, The Authors. All rights reserved.

关键词： Network coding

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Feasibility study of using electronics wireless electricity detector with python software

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AIP Conference Proceedings 2024年第1期2898卷

作者： H. A. Fadhil M. N. Junita F. N. Hasoon T. A. Fadil R. A. Rahim Electrical and Computer Dep. Faculty of Eng. Sohar University Sohar-Oman Faculty of Electronics Engineering Technology Universiti Malaysia Perlis 02600 Perlis Malaysia Electrical & communication Eng. National University of Science and Technology Muscat-Oman Department of Computer Eng. Techniques Dijlah University Baghdad IRAQ

In this paper, an electronic instrument was developed that can detect electrical energy without using the conventional probes. The proposed system can detect the AC and DC voltage via wireless detector. The circuit design is based on the theory of an electronic circuit consisting of Darlington transistors that have a high gain, and a copper strip (or wire) is used as a probe. It is primarily concerned with the development of an electronic circuit for the safe handling of hazardous electrical, radiation and chemical substances. Furthermore, the proposed system offers multipurpose services such as short circuit prevention and troubleshooting as well as cable disconnection prevention. It also utilizes hazardous sensor services for any leakage voltages and currents since only DC voltages are used in the circuit design. The design is considered "green innovation" due to the fact that a DC voltage source is used rather than AC or high voltage. Intelligently designed and selection practices make efficient use of resources and minimize energy consumption by creating efficient environments. System analysis has been conducted using Python software since this language offers flexibility, and is simple to use.

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Learning Based Model Predictive Control for Quadcopters with Dual Gaussian Process

arXiv

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arXiv 2021年

作者： Liu, Yuhan Tóth, Roland The Harbin Institute of Technology Department of Control Science and Engineering Harbin China The Eindhoven University of Tech. Dep. of Electrical Eng. Control Systems Group Eindhoven Netherlands The Institute for Computer Science and Control Budapest Hungary

An important issue in quadcopter control is that an accurate dynamic model of the system is nonlinear, complex, and costly to obtain. This limits achievable control performance in practice. Gaussian process (GP) based estimation is an effective tool to learn unknown dynamics from input/output data. However, conventional GP-based control methods often ignore the computational cost associated with accumulating data during the operation of the system and how to handle forgetting in continuous adaption. In this paper, we present a novel Dual Gaussian Process (DGP) based model predictive control strategy that improves the performance of a quadcopter during trajectory tracking. The bio-inspired DGP structure is a combination of a long-term GP and a short-term GP, where the long-term GP is used to keep the learned knowledge in memory and the short-term GP is employed to rapidly compensate unknown dynamics during online operation. Furthermore, a novel recursive online update strategy for the short-term GP is proposed to successively improve the learnt model during online operation in an efficient way. Numerical simulations are used to demonstrate the effectiveness of the proposed strategy. © 2021, CC BY-NC-SA.

关键词： Model predictive control

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Short Circuit Performance and Current Limiting Mode of a Monolithically Integrated SiC Circuit Breaker for DC Applications up to 800 V

Short Circuit Performance and Current Limiting Mode of a Mon...

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European Conference on Power Electronics and Applications

作者： Norman Boettcher Taro Takamori Keiji Wada Wataru Saito Shin-ichi Nishizawa Tobias Erlbacher Fraunhofer Institute for Integrated Systems and Device Technology (IISB) Erlangen Germany Dep. of Electrical Engineering and Computer Science Tokyo Metropolitan University Hachioji-shi Tokyo Japan Kyushu University Research Institute for Applied Mechanics Renewable Energy Center Kasuga-shi Fukuoka Fukuoka Japan Friedrich-Alexander University Chair of Electron Devices (LEB) Erlangen Germany

ISBN: (数字)9789075815399

ISBN: (纸本)9781665487009

This paper presents the short circuit performance of a novel SiC circuit breaker device, which is based on the “thyristor dual” functionality. The developed device structure is motivated with regard to manufacturing aspects and electrical requirements. Furthermore, the basic “thyristor dual” operation is elaborated on the basis of quasi-static electrical measurements of a fabricated prototype. The proposed self-sensing and self-triggering devices make auxiliary circuitry like sensors and micro-controllers expendable and practically have no propagation delay. As a result, short circuit clearance within 122 ns at 800 V is demonstrated in experiments. Moreover, by utilisation of a third device terminal, a temporary current limiter functionality can be obtained. The scalability of the current limit value is discussed on the basis of measurements in time domain. The maximum current limit value achieved is 7.4 times higher than the trigger current level of the circuit breaker device. Additionally, the same circuit configuration which is used for the current limiting mode, allows to remotely reset the circuit breaker after it turned to blocking-state. This opens up a wide range of possibilities to enhance the circuit breaker with intelligent functionalities.

关键词： Thyristors Circuit optimization Limiting Silicon carbide Circuit breakers Prototypes Topology

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Reinforcement Learning for Anti-Ransomware Testing

Reinforcement Learning for Anti-Ransomware Testing

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East-West Design & Test Symposium (EWDTS)

作者： Alexander Adamov Anders Carlsson NioGuard Security Lab Kharkiv National University of Radio Electronics Kharkiv Ukraine Dep. of Software Engineering Blekinge Institute of Technology Karlskrona Sweden Dep. of Computer Science Blekinge Institute of Technology Karlskrona Sweden

ISBN: (数字)9781728198996

ISBN: (纸本)9781728199009

In this paper, we are going to verify the possibility to create a ransomware simulation that will use an arbitrary combination of known tactics and techniques to bypass an anti-malware defense. To verify this hypothesis, we conducted an experiment in which an agent was trained with the help of reinforcement learning to run the ransomware simulator in a way that can bypass anti-ransomware solution and encrypt the target files. The novelty of the proposed method lies in applying reinforcement learning to anti-ransomware testing that may help to identify weaknesses in the anti-ransomware defense and fix them before a real attack happens.

关键词： Ransomware Cryptography Detectors Encoding Reinforcement learning Games Testing

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Quadcopter 3d-printer frame static optimization

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AIP Conference Proceedings 2023年第1期2977卷

作者： Khalid Mohsin Ali Mauwafak Ali Tawafik Alaa Adbdulhady Jaber Department of Computer Engineering Technology Faculty of Information Technology Imam Ja’afar Alsadiq University Baghdad Iraq Mechanical Department University of Technology Baghdad Iraq Dep. Of refrigeration & air conditioning Alnukhba University College Baghdad Iraq

The quadcopter is an advanced intelligent type of helicopter with four rotors; Qc is despite its intelligence and the complexity of its electronic parts, it is distinguished by the simplicity of the structure and its symmetry, and the four sides are equal in size, weight, and power of the motors. At present, the design of the quadcopter has diversified into a structure that takes the shape of a plus sign, others take a structure shaped like a letter H or hybrid H, and one that is the most common that takes the letter X, which we will work on. The most susceptible portion of the quadcopter to failure is the arms because they are sensitive to multiple types of stress, including fracture due to collision or fall and failure due to overloading. The goal of this study is to improve the design of the quadruple arm so that it can reliably lift heavy loads. The quad frame was designed with a size of 60 cm and a weight of 2 kg. eight structures of the same material (PLA), the same size wheelbase and the same weight, but in different arm shapes, these frames designed and analyzed statically by the SolidWorks Simulation to find the stresses, deformations, and areas of weakness in each arms separately, assuming the same power of motors and the same size of the propeller (lifting force) and the gravity force. The results showed that the bearing strength of the arm dep.nds on the shape of the cross-sectional area along the length of the arm according to the laws of bending stress.

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Hamiltonian Control for CC-CV Primary-side Buck Converter of Inductive Wireless EV Charging

Hamiltonian Control for CC-CV Primary-side Buck Converter of...

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IEEE/IAS Industrial and Commercial Power System Asia (I&CPS Asia)

作者： Thanet Sriprom Jutturit Thongpron Uthen Kamnarn Anon Namin Noureddine Takorabet Nicu Bizon Serge Pierfederici Babak Nahid-Mobarakeh Pongsiri Mungpom Burin Yodwong Phatiphat Thounthong Department of Electrical Engineering Faculty of Rajamangala University of Technology Lanna (RMUTL) Chiang Mai Thailand Groupe de Recherche en Energie Electrique de Nancy (GREEN) Universite de Lorraine Nancy France The National University of Science and Technology POLITEHNICA Bucharest Pitesti University Centre Pitesti Romania Laboratoire d'Energetique et de Mecanique Theorique et Appliquee (LEMTA) University of Lorraine Vandceuvre-Les-Nancy France Electrical and Computer Engineering McMaster University Hamilton Canada Thai French Innovation Institute King Mongkut's University of Technology North Bangkok Bangkok Thailand Dep. of Teacher Training in EE Faculty of Technical Education KMUTNB Bangkok Thailand

ISBN: (数字)9798350352290

ISBN: (纸本)9798350352306

This study presents a Hamiltonian control law for constant current - constant voltage (CC-CV) inductive wireless charging. The novel control system design, simulation, and experimentation aimed to confirm the Hamiltonian controller is a superior choice. The wireless charging experiments tested the step-resistant battery simulator and the EV battery. Based on the findings, it is possible to run the Hamiltonian control law for continuous 10A and 82 V charging while maintaining optimal response, stability, and realization. The charging system's maximum efficiency and power were 76.5% and 782 W.

关键词： Wireless communication Lithium-ion batteries PI control Buck converters Inductive charging Asia Stability analysis Electric vehicle charging Voltage control

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Model Representation of Business Processes

Model Representation of Business Processes

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IEEE Conference on Commerce and Enterprise Computing, CEC

作者： Abu Kuandykov Aizhan Kassymova Raissa Uskenbayeva Zhyldyz Kalpeyeva Nurseit Zhunissov International Information Technology University Almaty Kazakhstan Dep. Of Computer Engineering University Khoja Ahmet Yassawi International Turkestan Kazakhstan

The following topics are dealt with: business data processing; decision making; further education; business process re-engineering; educational institutions; data privacy; social networking (online); health care; orga... 详细信息

ISBN: (数字)9781728199269

ISBN: (纸本)9781728199276

关键词： Automation Task analysis Tools computer architecture architecture

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Introduction to the HICSS-53 software development for mobile devices, the internet-of-things, and cyber-physical systems MiniTrack

Proceedings of the Annual Hawaii International Conference on...

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Proceedings of the Annual Hawaii International Conference on System Sciences 2020年 2020-January卷 6629-6630页

作者： Majchrzak, Tim A. Grønli, Tor-Morten Kaindl, Hermann University of Agder Kristiansand Norway Kristiania University College Dep. Technology Oslo Norway TU Wien Inst. of Computer Tech. Vienna Austria

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Wayback Machine: A tool to capture the evolutionary behaviour of the bug reports and their triage process in open-source software systems

arXiv

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arXiv 2020年

作者： Jahanshahi, Hadi Cevik, Mucahit Navas-Sú, José Başar, Ayşe González-Torres, Antonio Data Science Lab Ryerson University Toronto Canada Computer Engineering Dep. Costa Rica Institute of Technology Cartago Costa Rica

The issue tracking system (ITS) is a rich data source for data-driven decision-making. Different characteristics of bugs, such as severity, priority, and time to fix, provide a clear picture of an ITS. Nevertheless, such information may be misleading. For example, the exact time and the effort spent on a bug might be significantly different from the actual reporting time and the fixing time. Similarly, these values may be subjective, e.g., severity and priority values are assigned based on the intuition of a user or a developer rather than a structured and well-defined procedure. Hence, we explore the evolution of the bug dep.ndency graph together with priority and severity levels to explore the actual triage process. Inspired by the idea of the "Wayback Machine" for the World Wide Web, we aim to reconstruct the historical decisions made in the ITS. Therefore, any bug prioritization or bug triage algorithms/scenarios can be applied in the same environment using our proposed ITS Wayback Machine. More importantly, we track the evolutionary metrics in the ITS when a custom triage/prioritization strategy is employed. We test the efficiency of the proposed algorithm using data extracted from three open-source projects. Our empirical study sheds light on the overlooked evolutionary metrics - e.g., overdue bugs and developers' loads - which are facilitated via our proposed past-event re-generator. Copyright © 2020, The Authors. All rights reserved.

关键词： computer software selection and evaluation

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