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Resource management for enhancing predictability in systems with limited processing capabilities

Resource management for enhancing predictability in systems ...

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international conference on Emerging Technologies and Factory Automation (ETFA)

作者： Alejandro Alonso Emilio Salazar Jorge López Dept. Ingeniería de Sistemas Telemáticos Universidad Politécnica de Madrid Spain Dept. Arquitectura y Tecnología de Sistemas Informáticos Universidad Politécnica de Madrid Spain

there is an increasing demand for computing systems composed by heterogeneous computers, connected by different types of networks, and that allow for accessing a wide range of services in a seamless way. Some of those computers are mobile or embedded and have limited resources, and can be overloaded when trying to handle their users demands. then it is not possible to ensure a proper behaviour of the running applications. this can be an important problem when dealing with critical events in healthcare, home surveillance, or forest monitoring. Resource reservation is a valid basis for handling this issue. It allows for guaranteeing a certain resource share for applications that are important for the proper behavior of a given system. this paper describes an implementation of a resource management component and its integration in the Linux kernel. this piece of software has allowed to assign CPU budgets to standard Java threads, which is an important facility, given the widespread of this programming language. this implementation has been validated on service oriented middleware, where relevant services are executed by thread with guaranteed budget, to improve its predictability.

关键词： Linux real time systems Kernel Java Instruction sets Resource management Safety

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An Open Architecture for Scalable Database Clustering

An Open Architecture for Scalable Database Clustering

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international Workshop on Enterprise Distributed Object computing, EDOCW

作者： Rui Carlos Oliveira Universidade do Minho Portugal

the Database Management System (DBMS) used to be a commodity software component, with well known standard interfaces and semantics. However, the performance, scalability and reliability expectations being placed on DBMS have increased the demand for a variety of add-ons, that augment the functionality of the database in a wide range of deployment scenarios, offering support for features such as clustering, replication, and self-management, among others. Recently, several such add-ons have been designed and implemented both in the academia and by leading commercial database providers. Each proposal tends to target certain goals and applications, therefore establishing specific tradeoffs that impair their flexibility. Moreover, it has been a common fundamental assumption that any add-ons should not be intrusive and that the DBMS should be kept unchanged and monolithically handled. While this is a very sensible and pragmatic view due to the complexity of DBMS and the critical role they play in existing information systems, emerging demands on scalability require greater flexibility of the whole data management system so that major functionalities can be realized as autonomous services with specific tradeoffs and quality of service. the GORDA project (EU 1ST FP6) proposed a general purpose DBMS reflection architecture and interface - GAPI, which supports a number of useful extensions while at the same time admitting efficient implementations. By exposing at the interface an abstract representation of the systems' inner functionality, the later can be inspected and manipulated, thus changing its behavior without loss of encapsulation. DBMS have long taken advantage of this - on the database schema, on triggers, and when exposing the log. In this talk we describe the various aspects and goals that led to GAPI and we illustrate the usefulness of the architecture and interface with concrete examples. GORDA fundamentally emphasizes the modularity of the add-ons, e.g. cluster

关键词： Clouds Database systems Scalability Spatial databases Computer architecture Software standards Proposals Management information systems Quality management Quality of service

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Device driver synthesis for embedded systems

Device driver synthesis for embedded systems

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international conference on Emerging Technologies and Factory Automation (ETFA)

作者： Julien Tanguy Jean-Luc Béchennec Mikaël Briday Sébastien Dubé Olivier H. Roux Espace Performance La Fleuriaye See4sys Carquefou France IRCCyN Lab École Centrale de Nantes LUNAM université Nantes France

Currently the development of embedded software managing hardware devices that fulfills industrial constraints (safety, real time constraints) is a very complex task. To allow an increased reusability between projects, generic device drivers have been developed in order to be used in a wide range of applications. Usually the level of gener-icity of such drivers require a lot of configuration code, which is often generated. However, a generic driver requires a lot of configuration and need more computing power and more memory needs than a specific driver. this paper presents a more efficient methodology to solve this issue based on a formal modeling of the device and the application. Starting from this modeling, we use well-known game theory techniques to solve the driver model synthesis problem. the resulting model is then translated into the actual driver embedded code with respect to an implementation model. By isolating the model of the device, we allow more reusability and interoperability between devices for a given application, while generating an application-specific driver.

关键词： Computational modeling Registers Games Semantics Hardware Safety Synchronization

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Mindful: Using double links for stabilizing mmWave wireless channels for application to autonomous vehicles and augmented reality 17

Mindful: Using double links for stabilizing mmWave wireless ...

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17th international conference on Mobile systems and Pervasive computing, MobiSPC 2020

作者： Ajorloo, Hossein Sreenan, Cormac J. Bomfin, Roberto Danneberg, Martin Fettweis, Gerhard School of Computer Science and IT University College Cork CorkT12 XF62 Ireland Vodafone Chair Mobile Communication Systems Technische Universität Dresden Dresden01062 Germany

applications that require short-range ultra-high bitrate communication, such as cable removal in virtual reality games and communication between autonomous vehicles, are examining solutions such as millimetre wave wireless (mmWave). When using mmWave, steerable directional antennas are used to mitigate the severe signal power attenuation common with high frequencies. Nonetheless, even small movements in the user device can cause a sudden drop in data-rate down (even to 0 bits/s) making mmWave channels unstable and unusable. To make the channel more stable for the aforementioned applications, which are vulnerable due to frequent blockages and fast movement, we designed and developed a robust solution based on a double link mmWave system. We duplicate the radio transceivers (RT) of a user device (UD) to increase the probability of finding line of sight to an access point (AP) representing the other side of the communication channel. the AP selects one RT of the UD for communication, based on continuous measurement of quality compared to the channel of the other RT. this concept was implemented in a laboratory environment and evaluated using a series of controlled experiments. the experiments serve to validate that using double links is feasible, and is considerably more robust and it can double the link utilization, compared to only using one mmWave link. these results show great promise for the concept, by demonstrating that using multiple mmWave links yields ultra-high bit-rate wireless communication with no disruption, even in the presence of blockages and mobility. © 2020 the Authors.

关键词： real time systems

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Cloud-Connected Wearable Devices for Lone Worker Protection With Wireless Sensor Networks

Cloud-Connected Wearable Devices for Lone Worker Protection ...

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Sustainable Expert systems (ICSES), international conference on

作者： N. Mohankumar K. K. Manivannan A. Ramesh Babu M Maria Sampoornam Rajesh Kambattan Kovarasan C. Srinivasan Symbiosis Institute of Technology Nagpur Campus Symbiosis International (Deemed University) Pune Maharashtra India Department of Mechatronics Engineering KCG College of Technology Chennai Tamil Nadu India School of Computer Applications Vidya Vikas Institute of Engineering and Technology Mysore Karnataka India Department of Information Technology J.J College of Engineering and Technology Tiruchirappalli Tamil Nadu India Department of Computer Science and Engineering Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology Chennai Tamil Nadu India Department of Computer Science and Engineering Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences Saveetha University Chennai Tamil Nadu India

ISBN: (数字)9798331540364

ISBN: (纸本)9798331540371

Various sectors continue to prioritize lone worker safety, which requires creative ways to provide quick support and monitoring. To safeguard lone workers, this paper introduces a new method that makes use of cloud-connected wearable devices that are coupled with Wireless Sensor Networks (WSNs). the system design relies on sensors embedded in wearable devices that can monitor a range of environmental elements as well as the vital signs of workers. A central cloud platform receives data in real-time via wireless communication from these devices and processes and analyzes it. the system may detect possible dangers or crises using smart techniques and immediately notify those who are supposed to react or the proper authorities. Cloud computing also makes it easy to store, analyze, and monitor large amounts of data over time, which is great for doing proactive risk assessments and improving safety standards. It demonstrates solution's capacity to improve lone worker safety, reduce reaction times, and mitigate hazards via simulations and actual deployment scenarios, efficacy and dependability. this growing body of knowledge on how to protect lone workers in various workplaces by using the power of IoT and cloud computing.

关键词： Cloud computing Wireless sensor networks Data analysis Employment real-time systems Safety Risk management Wearable devices Protection Monitoring

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applications, Insights and Implications of Digital Twins in Smart City Management

Applications, Insights and Implications of Digital Twins in ...

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international Smart Grid Workshop and Certificate Program (ISGWCP)

作者： Mustafa Ersan Erdal Irmak Alperen Mustafa Colak Department of Electrical and Electronics Engineering Graduate School of Natural and Applied Sciences Gazi University Ankara Türkiye Department of Electrical and Electronics Engineering Faculty of Technology Gazi University Ankara Türkiye Industrial and Energy Systems Division Toshiba Mitsubishi-Electric Industrial Systems Corporation Tokyo Japan

ISBN: (数字)9798350361612

ISBN: (纸本)9798350361629

Digital twins (DTs) represent a transformative paradigm in urban management, leveraging computer modelling and real-time data integration to create virtual replicas of physical entities and systems. this paper explores their multifaceted applications, emphasizing efficiency, sustainability, and resilience. Synthesizing insights from diverse disciplines, it delineates the process of building digital twins and underscores their role in predictive maintenance, optimized performance, and data-driven decision-making. Using a smart city example, the paper illustrates how digital twins facilitate proactive interventions, resource optimization, and informed decision-making in domains such as traffic management, energy optimization, and public safety. It highlights the significance of digital twins in fostering collaboration, innovation, and resilience, empowering cities to address complex challenges and create inclusive, sustainable environments. In conclusion, digital twins emerge as indispensable tools in realizing the vision of smart, connected, and adaptive cities, poised to navigate the complexities of the contemporary urban landscape and pave the way for a sustainable future.

关键词： Technological innovation Smart cities Decision making real-time systems Public security Digital twins Sustainable development

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A New Universal-Environment Adaptive Multi-processor Scheduler for Autonomous Cyber-Physical System

A New Universal-Environment Adaptive Multi-processor Schedul...

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international conference on Computer and Information Science (ACIS)

作者： Kailong Zhang Yuan Yao Ouassila Labanni Zhou Lu Xiao Wu Northwestern Polytechnical University Xi'an Shaanxi CN Universite de Bourgogne Dijon Bourgogne FR

Robot, spaceship and other applications that can be called autonomous Cyber-Physical systems (CPS) are all smart embedded systems, which usually run in open environment by themselves with inhered intelligent capabilities. Besides the application intelligence, the researches of adaptive platform for such systems have also become topics recently. Based on the analysis of current work, a new environment adaptive scheduler (α-S) for multiprocessor platform of a cyber-physical system is proposed in this article. And then, its related structures, models, and reasoning methods are studied deeply. Different from the existing ones, α-S can schedule all tasks according to the environment change by two layered functions. the upper one uses not only the properties of a task but also the state of environment and system resources as input variables, which is defined as Universal Environment (UE), and then calculates the Quality of Scheduling of all tasks with a customized fuzzy logic. the lower one allocates these tasks onto processors automatically under the dynamic performance evaluation of computing resources, such as load and success rate of each processor. Further, some allocation policies are studied and defined to make α-S be more flexible to adapt different requirements. Finally, studied methods are simulated and then experimented on an obstacle-avoiding robot system.

关键词： Quality of service Program processors Cognition Adaptation models Resource management Processor scheduling real time systems

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A high efficient Exponentially Tapered Vivaldi antenna with DGS for Ultra-wide Band applications

A high efficient Exponentially Tapered Vivaldi antenna with ...

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Annual Information Technology, Electromechanical Engineering and Microelectronics conference (IEMECON)

作者： T. Srinivasa Reddy Nalluri Prophess Raj Kumar Praveena Kati N. Nanda Prakash N. Prasanthi Department of Electronics and Communication Engineering Chalapathi Institute of Engineering and Technology Guntur Andhra Pradesh

ISBN: (数字)9798350387315

ISBN: (纸本)9798350387322

the Vivaldi antenna with meander line defected ground structure (DGS) resonates at ultra-wide band (UWB) frequencies. the substrate patch is designed with exponentially tapered slot Vivaldi (ETSV) antenna and rectangular slot with meander line DGS is etched on ground plane. the four rectangular slots are etched on ground for accurate impedance matching of the Vivaldi antenna. the proposed Vivaldi antenna is resonated at three frequencies 6.95 GHz, 8.47 GHz and 9.93 GHz. the higher reflection coefficient values are measured at center frequencies. the electric field, magnetic field co polarization and cross polarization values measured at center frequencies. the reflection coefficient (S11) and voltage standing wave ratio (VSWR) of fabricated antenna is reasonable matches with simulated antenna. the surface current distributions values are accurate for real time UWB applications. the Vivaldi antenna is useful for radar and satellite applications.

关键词： Microwave antennas Satellites Spaceborne radar Vivaldi antennas Resonant frequency Radar antennas Reflector antennas Frequency measurement Reflection coefficient Radar applications

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Segmental analysis of GPS accuracy in ESP based device for Linear Distance Measurement

Segmental analysis of GPS accuracy in ESP based device for L...

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Annual Information Technology, Electromechanical Engineering and Microelectronics conference (IEMECON)

作者： Shopan Dey Afaq Ahmad Sougata Banerjee University of Engineering & Management Jaipur Rajasthan

ISBN: (数字)9798350387315

ISBN: (纸本)9798350387322

the Global Positioning System (GPS) has emerged as a crucial tool in surveying and measurement studies, allowing for more quick methods of surveys. In this particular investigation, the analysis of linear measurements involved the utilization of a smart GPS handheld device. the chosen area for this study was a portion within the campus of University of Engineering & Management, Jaipur (UEMJ). the primary objective of the study was to implement and analyze the freshly designed prototype device aimed for land use surveys conducted using GPS. the foundational data for mapping the entire study area comprised GPS readings obtained during the field survey. this paper endeavors to assess the efficacy of handheld GPS in land use surveys, acknowledging its inherent low precision. A comparative analysis was also performed to judge the real-time efficiency of the device. Interestingly, the survey showed distinctive behavior of GPS module precision for different range of measurements. Hence, the differential precision of low-cost GPS module is surveyed and analyzed in this paper. the handheld GPS is recommended for preliminary surveys, particularly in situations characterized by a shortage of manpower and time.

关键词： Surveys Performance evaluation Accuracy Prototypes Position measurement real-time systems Sensors Microwave filters Research and development Global Positioning System

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DeepDect: A Facial Deepfake Video Detection Application using Ensemble Learning

DeepDect: A Facial Deepfake Video Detection Application usin...

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IEEE conference on systems, Process & Control (ICSPC)

作者： Wan Xin Tay Hui Na Chua Muhammed Basheer Jasser Bayan Issa Richard T.K. Wong Department of Computing and Information Systems School of Engineering and Technology Sunway University No. 5 Jalan Universiti Bandar Sunway Selangor Darul Ehsan Malaysia Faculty of Informatics Engineering University of Aleppo Syria

ISBN: (数字)9798350391398

ISBN: (纸本)9798350391404

the emerging technology of deepfake video poses significant threats to information integrity and public trust. Deepfake videos come in various forms, including face swaps, lip-syncing, and full-body simulations. Detection algorithms may struggle to generalize across these different types of deepfakes, leading to lower effectiveness in real-world applications. An advanced deepfake detection system is developed using an ensemble approach, combining the strengths of three pre-trained Convolutional Neural Networks (CNNs)ResNeXt50, Xception, and EfficientNet-v2-with Long ShortTerm Memory (LSTM) layers to capture both spatial and temporal features from videos to improve detection accuracy. the ensemble model is further enhanced by incorporating additional features such as lip movements, eye blinks, head poses, and color contrasts to identify subtle inconsistencies in deepfake videos that are often ignored by traditional detection methods. the ensemble model achieves an accuracy of ${8 4. 0 6 \%}$, with a good balance between precision and recall, indicating its effectiveness in real-world applications. We developed DeepDect, a web application embedded with the ensemble model, to provide a user-friendly interface for deepfake detection by uploading videos or submitting URL links. the application includes educational content about deepfake techniques to raise user awareness about the potential dangers of deepfakes.

关键词： Uniform resource locators Deepfakes Adaptation models Accuracy Computational modeling Feature extraction Data models Robustness Ensemble learning Overfitting

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