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A hypothetical comparative evaluation system for arctic indoors

Frontiers of Architectural Research 2025年第1期14卷 210-223页

作者： Seyed-Amin Tabatabaeifard Jean-Francois Lalonde Marc Hebert Andre Potvin Claude MH.Demers GRAP(Groupe de Recherche en Ambiances Physiques) Ecole d’architectureUniversite LavalQuebecCanada Computer Vision and Systems Lab Department of Electrical and Computer EngineeringUniversite LavalQuebecCanada CERVO Brain Research Centre Faculty of MedicineUniversite LavalQuebecCanada

This research presents an innovative approach to evaluating indoor spaces,combining qualitative attributes with numerical architectural metrics. A hypothetical comparative visualization system is introduced, utilizing HDR visual imaging and thermal imaging in 360° field of view across multiple indoor environments. The study aims to provide architectsand occupants with a user-friendly tool informing them about the primary considerations oftheir built spaces, with a specific focus on indoor environmental qualities in remote Arctic regions. Key inquiries delve into the efficacy of the spherical approach and the capacity ofcomparative visualization to offer insights into space quality. Preliminary experiments contrastindoor environments in terms of circadian lighting, thermal uniformity, and view access tooutside in the 360° field of view (VAR360). The resulting visualizations hold significance inintroducing an immersive approach for depicting specific non-visible environmental qualities,particularly in relation to the window characteristics of spaces. It demonstrates the integration of multiple environmental variables, both steady-state and temporal, from central pointswithin spaces, providing a comprehensive view over their non-visible qualities. These resultsshould be useful for researchers and practitioners within building sciences, computer vision,and photobiology, showcasing an out-of-the-box approach for categorizing indoor spaces basedon standards and human-environmental qualifications.

关键词： Environmental assessment 360°imaging Comparative systems Low-cost tools Built environments

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Cybersecurity in local governments: A systematic review and framework of key challenges

Urban Governance

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Urban Governance 2025年第1期5卷 1-19页

作者： Hossain, Sk Tahsin Yigitcanlar, Tan Nguyen, Kien Xu, Yue City 4.0 Lab School of Architecture and Built Environment Queensland University of Technology 2 George Street Brisbane 4000 QLD Australia School of Electrical Engineering and Robotics Queensland University of Technology 2 George Street Brisbane 4000 QLD Australia School of Computer Science Queensland University of Technology 2 George Street Brisbane 4000 QLD Australia

Cybersecurity has emerged as a critical concern in modern urban governance, as local governments now extend their responsibilities beyond traditional infrastructure management to safeguard digital systems and citizen data in increasingly digitised smart city environments. Despite the importance of robust cybersecurity measures, there is a concerning gap—i.e., local governments often exhibit a cybersecurity posture that is inadequately prepared to counter the rising cyber threats. This discrepancy underscores the urgency for a comprehensive understanding of the challenges restricting effective cybersecurity in local governmental settings. This paper aims to elucidate these challenges of local governments in a structured framework utilising a systematic literature review method named the PRISMA protocol. The findings reveal that the stakes are high when it comes to cybersecurity for local governments, with the key challenges being financial resource constraints, technological vulnerabilities, human factors, and the regulatory framework. This study recommends improving interdepartmental coordination, adopting relevant policies, and executing targeted cybersecurity training to address these challenges. The study also highlights unconventional approaches to mitigate financial and skill resource limitations, including the utilisation of open-source security tools, outsourcing specific cybersecurity functions, and establishing collaborations with local cybersecurity agencies, academic institutions, and the private sector to obtain expertise and advanced resources. Overall, this study offers valuable insights into the critical cybersecurity challenges faced by local governments and provides specific recommendations, equipping urban policymakers, administrators, and researchers with valuable guidance to enhance cybersecurity resilience within this critical yet understudied research domain. © 2024 The Author(s)

关键词： Cyber threat Cybersecurity Local government Municipality Smart city Urban governance

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Efficient Tree-based Parallel Algorithms for N-Body Simulations Using C++ Standard Parallelism 24

Efficient Tree-based Parallel Algorithms for N-Body Simulati...

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Proceedings of the SC '24 Workshops of the International Conference on High Performance Computing, Network, Storage, and Analysis

作者： Thomas Lane Cassell Tom Deakin Aksel Alpay Vincent Heuveline Gonzalo Brito Gadeschi School of Computer Science University of Bristol Bristol UK Engineering Mathematics and Computing Lab Interdisciplinary Center for Scientific Computing Heidelberg University Heidelberg Germany GPU Architecture NVIDIA Munich Germany

ISBN: (纸本)9798350355543

The Barnes-Hut approximation for N-body simulations reduces the time complexity of the naive all-pairs approach from O(N2) to O(N log N) by hierarchically aggregating nearby particles into single entities using a tree data structure. This inherently irregular algorithm poses substantial challenges for performance portable implementations on multi-core CPUs and GPUs. We introduce two portable fully-parallel Barnes-Hut implementation strategies that trade-off different levels of GPU support for performance: an unbalanced concurrent octree, and a balanced bounding volume hierarchy sorted by a Hilbert spacefilling curve. We implement these algorithms in portable ISO C++ using parallel algorithms and concurrency primitives like atomics. The results demonstrate competitive performance on a range of CPUs and GPUs. Additionally, they highlight the effectiveness of the par execution policy for highly concurrent irregular algorithms, outperforming par_unseq on CPUs and GPUs with Independent Thread Scheduling.

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Self-Adjusting Network Slicing for Dynamic Heterogeneous Task Offloading in UAV-Enabled Mobile Edge Computing

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IEEE Transactions on Cognitive Communications and Networking 2025年

作者： Li, Xulong Mao, Wencan Xu, Xinyi Liu, Yaxi Zhang, Huifeng Huangfu, Wei Long, Keping University of Science and Technology Beijing School of Computer and Communication Engineering Beijing100083 China National Institute of Informatics Information Systems Architecture Science Research Division Tokyo101-8430 Japan Zhejiang Lab Hangzhou311500 China

Unmanned aerial vehicle (UAV)-enabled mobile edge computing (MEC) has received wide attention for its ability to significantly reduce latency with flexible mobile aerial nodes. However, the existing works merely consider a fixed periodic network slicing and usually neglect the characterization of computing tasks in practical applications. Motivated by this, we envision a novel scenario where the dynamics and heterogeneity of users and tasks are considered in UAV-enabled MEC networks. We propose a novel self-adjusting two-timescale network slicing scheme based on the internal mechanism in deep reinforcement learning (DRL) to automatically determine whether and when network slicing needs to be reconstructed. Such a novel scheme balances reconstruction cost and system performance compared with traditional fixed schemes. We build an optimization to minimize total system cost for joint UAV trajectory planning and resource allocation at both network and user slice levels. To tackle this problem, we design a novel self-adjusting two-timescale proximal policy optimization (PPO) algorithm that utilizes the property of the critic network, referred to as SaTPPO. Experiment results manifest the effectiveness of the proposed SaTPPO, and it has a lower system cost than the traditional fixed schemes. Moreover, the proposed SaTPPO outperforms the state-of-the-art baselines concerning effectiveness and efficiency. © 2015 IEEE.

关键词： Micro air vehicle (MAV)

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ANALYTICAL TRANSIENT-RESPONSE OF CMOS INVERTERS

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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-FUNDAMENTAL THEORY AND APPLICATIONS 1992年第1期39卷 42-44页

作者： KAYSSI, AI SAKALLAH, KA BURKS, TM Advanced Computer Architecture Lab Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor MI USA

A general formula relating the waveform at the output of a CMOS inverter to the waveform at its input is derived. The formula is applied to three cases: a step input, a ramp input, and an exponential input. A one-dimensional functional dependence of the inverter propagation delay and output slew rate on circuit parameters is derived and an inverter macromodel for timing analysis is suggested and experimentally verified.

关键词： Transient analysis Transient response Inverters Semiconductor device modeling Circuits Capacitance Timing Space exploration Signal design MOS devices

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Integrating Simulation and AI for Optimal Electric Vehicle Charging Infrastructure: Achievements and Future Directions 16th

Integrating Simulation and AI for Optimal Electric Vehicle...

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16th EAI International Conference on Simulation Tools and Techniques, SIMUTools 2024

作者： Guisado-Lizar, José-Luis Ragel-Díaz-Jara, David Navas-Orozco, Antonio Morera-Figueroa, José Diaz-del-Rio, Fernando Morón-Fernández, María José Cerezuela-Escudero, E. Cardenas-Montes, Miguel Jiménez-Moreno, Gabriel Department of Computer Architecture and Technology Universidad de Sevilla Avenida Reina Mercedes s/n Sevilla41012 Spain I3US Research Institute Universidad de Sevilla Seville Spain SCORE Lab Universidad de Sevilla Seville Spain CIEMAT Centro Inv. Energéticas Medioambientales y Tecnológicas Madrid Spain

ISBN: (纸本)9783031873447

Electric vehicles (EVs) are the most prominent technology for reducing road transport emissions. Their rapid adoption necessitates efficient deployment of charging infrastructure. This study presents works in progress in an innovative approach integrating simulation and artificial intelligence (AI) to optimize EV charging station placement. We develop a microscopic traffic simulation model combining cellular automata and agent-based techniques to capture the dynamic interactions between vehicles, charging stations, and urban environments. Genetic algorithms and neural networks are employed to navigate the complex solution space and identify optimal configurations. The model considers multiple factors including traffic patterns, air quality, grid impacts, and urban mobility. The objective of this holistic approach is to improve charging infrastructure planning, leading to reduced congestion, lower emissions, and enhanced urban mobility. We discuss achievements to date and outline future research directions. © ICST Institute for computer Sciences, Social Informatics and Telecommunications Engineering 2025.

关键词： Genetic algorithms

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Platform Urbanism for Resident Safety: A Real-Time Predictive Microclimate Risk Monitoring and Alert System

SSRN

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SSRN 2025年

作者： Hossain, Sk Tahsin Yigitcanlar, Tan Nguyen, Kien Xu, Yue City 4.0 Lab School of Architecture and Built Environment Queensland University of Technology 2 George Street BrisbaneQLD4000 Australia School of Electrical Engineering and Robotics Queensland University of Technology 2 George Street BrisbaneQLD4000 Australia School of Computer Science Queensland University of Technology 2 George Street BrisbaneQLD4000 Australia

Urban microclimates significantly impact public health, liveability, and emergency preparedness, yet traditional weather alert systems often rely on centralised data that fails to capture the spatial variability of conditions within cities. This study presents an innovative platform that integrates ArcGIS GeoEvent Server with AIoT-driven predictive analytics to deliver hyper-localised weather alerts. The platform’s adaptable design enables the incorporation of location-specific AI/ML-based predictive models and context-aware notifications, tailored to at-risk populations based on their location, health conditions, and disabilities. Featuring three GeoEvent Services and two ArcGIS Notebook Schedules, the system facilitates real-time data ingestion, processing, predictive modelling, and dissemination. A case study in Brisbane, Australia, demonstrates its capacity to address microclimatic variability, revealing significant differences in thermal stress and precipitation patterns across suburbs. Unlike traditional city-wide alerts, the platform provides targeted notifications prioritising vulnerable groups such as children, the elderly, and individuals with chronic conditions or disabilities. This approach enhances urban resilience and offers a scalable framework for applications in health monitoring, emergency response, and public safety. © 2025, The Authors. All rights reserved.

关键词： Emergency services

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ERROR CONFINEMENT - DATA RECOVERY IN DISTRIBUTED SYSTEMS.

ERROR CONFINEMENT - DATA RECOVERY IN DISTRIBUTED SYSTEMS.

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Proceedings - Second Symposium on Reliability in Distributed Software and Database Systems.

作者： Romdhane, M.Ben Courtois, B. IMAG Lab Computer Architecture Group Grenoble Fr IMAG Lab Computer Architecture Group Grenoble Fr

In the fault-tolerant distributed processing systems some failures may be still considered due to late failure detection and/or to transmission delays. The failures may be caused by both hardware or software. A method is introduced that bufferizes the information before using it and determines where the information may be used. The operation of a telephone system is used to illustrate this method used in duplicate data recovery.

关键词： INFORMATION RETRIEVAL SYSTEMS

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Deterministic BIST with partial scan

Deterministic BIST with partial scan

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1999 European Test Workshop, ETW 1999

作者： Kiefer, Gundolf Wunderlich, Hans-Joachim Computer Architecture Lab University of Stuttgart Germany

ISBN: (纸本)076950390X

An efficient deterministic BIST scheme based on partial scan chains together with a scan selection algorithm tailored for BIST is presented. The algorithm determines a minimum number of flipflops to be scannable so that the remaining circuit has a pipelinelike structure. Experiments show that scanning less flipflops may even decrease the hardware overhead for the on-chip pattern generator besides the classical advantages of partial scan such as less impact on the system performance and less hardware overhead.

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Fast controllers for data dominated applica

Fast controllers for data dominated applica

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1997 European Conference on Design and Test, EDTC 1997

作者： Hertwig, Andre Wunderlich, Hans-Joachim Computer Architecture Lab University of Stuttgart Germany

ISBN: (纸本)0818677864

A target structure for implementing fast edge-triggered control units is presented. In many cases, the proposed controller is faster than a one-hot encoded structure as its correct timing does not require master-slave flip-flops even in the presence of unpredictable clocking skews. A synthesis procedure is proposed which leads to a performance improvement of 40% on average for the standard benchmark set whereas the additional area is less than 25% compared with conventional finite state machine (FSM) synthesis. The proposed approach is compatible with the state-of-the-art methods for FSM decomposition, state encoding and logic synthesis. © 1997 IEEE.

关键词： Benchmarking

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