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27th IEEE International Conference on Intelligent Transportation systems, ITSC 2024

作者： Zheng, Linwei Hu, Xiangcheng Ma, Fulong Zhao, Guoyang Qi, Weiqing Ma, Jun Liu, Ming The Hong Kong University of Science and Technology Department of Electronic and Computer Engineering Hong Kong Robotics and Autonomous Systems Thrust Guangzhou China The Hong Kong University of Science and Technology Division of Emerging Interdisciplinary Areas Hong Kong

ISBN: (纸本)9798331505929

Place recognition serves as a fundamental component in tasks like loop closure detection and relocalization for mobile robots. Polar coordinate representations, such as Scan Context, which align with the data structure of range sensors, have become the most common data structure for point cloud descriptors in place recognition. While polar representations demonstrate the rotation invariance, they remain susceptible to translation variations. In this study, we introduce a novel approach: shifting the viewpoint of the original point cloud to construct the unified Scan Context, thereby mitigating translation variance. Our key concept focuses on identifying a stable, unified viewpoint for a given place and then pre-translating the point cloud accordingly. This naturally results in a descriptor devoid of translation variance. Importantly, within a given place, the viewpoint unification process tends to relocate the viewpoint to a similar position, irrespective of the original sensor perspective. In other words, the unified Scan Context becomes more closely associated with the place's structural characteristics than the physical location of the sensor. We validate our method through a series of comprehensive experiments encompassing synthetic scenarios and real-world datasets, showcasing its robustness in effectively handling translation variations. © 2024 IEEE.

关键词： Data structures

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A Game-Theoretic Approach for Pricing and Determining Quality Levels of Cybersecurity Products Under an Exogenous Information-Sharing program 19th

A Game-Theoretic Approach for Pricing and Determining Qualit...

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19th International Conference on the Economics of Grids, Clouds, systems, and Services, GECON 2022

作者： Rasti-Barzoki, Morteza Altmann, Jörn Egger, Bernhard Department of Industrial and Systems Engineering Isfahan University of Technology Isfahan84156-83111 Iran Institute of Engineering Research College of Engineering Seoul National University Seoul08826 Korea Republic of Technology Management Economics and Policy Program College of Engineering Seoul National University Seoul08826 Korea Republic of Department of Computer Science and Engineering College of Engineering Seoul National University Seoul08826 Korea Republic of

ISBN: (纸本)9783031293146

Price and quality level of products are two important decisions of any business. This paper provides equilibrium solutions for these decisions of two players for a cybersecurity ecosystem, including a solution provider and an information provider. We assume that end users join a cybersecurity ecosystem based on the prices and qualities of the solution provider’s and information provider’s products;so that, the increasing of the prices or/and decreasing the qualities will reduce the number of end-users of that ecosystem. Also, it is assumed that there is an exogenous information-sharing program under which the effect of quality of the information provider’s product on the cybersecurity level depends on the level of information-sharing. Under this information-sharing program, the equilibrium solutions of prices and qualities of these two players are given. Also, some results and insights are given with a numerical example. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Game theory

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Review of Urban Heat Island and Building Energy Modeling Approaches

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Journal of engineering for Sustainable Buildings and Cities 2022年第1期3卷 011003页

作者： Ameer, B. Krarti, M. Department of Civil Environmental and Architectural Engineering Building Systems Program University of Colorado Boulder Boulder 80309 CO United States

In this paper, a review of the current literature in modeling urban heat island (UHI) phenomena including its main causes and effects is summarized. The main goal of the review is to assess the current modeling capabilities to accurately determine the impacts of UHI on outdoor comfort levels and urban building energy demands. In particular, the analysis techniques and modeling approaches are overviewed to estimate the mutual thermal interactions between urban atmosphere and buildings. In addition, the applications and the limitations of various modeling methods are discussed to predict outdoor thermal comfort and urban building energy consumption. The specific capabilities of the reviewed modeling approaches are highlighted to assess the effectiveness of mitigation strategies of the UHI effects. As part of the review analysis, recommendations are outlined to improve current modeling approaches to predict more accurately the impacts of UHI phenomena on urban building energy performance. Copyright © 2022 by ASME.

关键词： air conditioning atmospheric layers building energy performance multi-scale analysis outdoor thermal comfort UHI mitigation solution UHI modeling approaches urban environment urban heat island (UHI) effects

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Evaluating a Hospital Smart Notification System in a Simulated Environment: The Method 25th

Evaluating a Hospital Smart Notification System in a Simulat...

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25th International Conference on Human-Computer Interaction, HCII 2023

作者： Ali, Haneen Fatemi, Yasin Batchelor, Miranda Capodiferro, Cordelia Marler, Logan Hamasha, Sa’d Department of Industrial and Systems Engineering Auburn University AuburnAL United States Health Services Administration Program Auburn University AuburnAL United States

ISBN: (纸本)9783031359910

The call light system is a central communication technology linking care providers and patients. Call light systems in hospital settings help reduce the likelihood and severity of adverse events and ambulatory conditions by allowing nurses to quickly respond to patient needs. However, the call light system was found to be associated with major challenges and usability issues that negatively impacted patients’ safety and quality of care. This study aims at evaluating the effectiveness of a high-fidelity prototype of a previously designed smart communication system in a simulated environment. College students were invited to mimic the role of patients, and nursing students were invited to perform routine tasks using a traditional call light system and the smart system. Participants were instructed to perform routine tasks using pre-designed scenarios in a simulated environment using the traditional call light system and the smart system. Results show that the smart system reduced the overall response time by more than 50%. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Hospitals

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A Game-Theoretic Approach for Pricing and Determining Virtual Reality Investment and Cybersecurity Level in a Dual-Channel Supply Chain 19th

A Game-Theoretic Approach for Pricing and Determining Virtua...

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19th International Conference on the Economics of Grids, Clouds, systems, and Services, GECON 2022

作者： Alaei, Amir Mohammad Rasti-Barzoki, Morteza Altmann, Jörn Egger, Bernhard Department of Industrial and Systems Engineering Isfahan University of Technology Isfahan84156-83111 Iran Institute of Engineering Research College of Engineering Seoul National University Seoul08826 Korea Republic of Technology Management Economics and Policy Program College of Engineering Seoul National University Seoul08826 Korea Republic of Department of Computer Science and Engineering College of Engineering Seoul National University Seoul08826 Korea Republic of

ISBN: (纸本)9783031293146

Virtual reality has become a new option to inform the customers about product before purchasing. However, providing virtual reality may create new challenges. For instance, consumers may obtain essential information about products by using virtual reality option, but eventually they buy their products from the offline channel. This phenomenon is called webrooming. Another challenge is cyber-attacks. E-tailers and their consumers face risks from cyber-attacks. Thus, e-tailers are investing to improve cybersecurity. We consider a dual-channel supply chain consisting of an offline retailer and an e-tailer who purchase the same product from a manufacturer at the same wholesale price. The e-tailer offers a partial refund policy in order to attract the customers. Also, to reduce consumer valuation uncertainty, the e-tailer faces the decision on whether to introduce virtual reality. We analyze three scenarios. Firstly, the e-tailer does not offer virtual reality. Secondly, the e-tailer offers virtual reality, but he does not invest on cybersecurity. Thirdly, the e-tailer offers virtual reality and invests on cybersecurity. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Game theory

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Exploring the Effectiveness of Work from Home: A Text Mining Analysis of Employee Perceptions and Experiences 7

Exploring the Effectiveness of Work from Home: A Text Mining...

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7th Information systems International Conference, ISICO 2023

作者： Nadlifatin, Reny Persada, Satria Fadil Beatrice, Amanda Putri, Nadya Permata Young, Michael Nayat Prasetyo, Yogi Tri Redi, Anak Agung Ngurah Perwira Department of Information Systems Institut Teknologi Sepuluh Nopember Kampus ITS Sukolilo Surabaya60111 Indonesia Entrepreneurship Department BINUS Business School Undergraduate Program Bina Nusantara University Jakarta11480 Indonesia Industrial Engineering Department Universitas Pembangunan Nasional "Veteran" Jawa Timur Surabaya60294 Indonesia School of Industrial Engineering and Engineering Management Mapua University 658 Muralla St. Intramuros Manila1102 Philippines Industrial Engineering Department Faculty of Engineering and Technology Sampoerna University Jakarta12780 Indonesia

Work from home (WFH) has become a global phenomenon that continues to grow, especially since the COVID-19 pandemic hit the world. Many organizations and companies are forced to adopt a remote working model to keep their employees safe. The usefulness of WFH is still up for dispute, though. Text mining analysis can be utilized to determine how beneficial working from home is. Sentiment analysis uses text analysis to gather ten thousand data from social media Tweets. Joy emotion is predicted to dominate with 83.98 percent according to the mining performed by the vocabulary valence aware dictionary and sentiment reasoner (VADER). © 2023 The Authors. Published by Elsevier B.V.

关键词： Sentiment analysis

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Exact Solution of the Full RMSA Problem in Elastic Optical Networks

IEEE Networking Letters

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IEEE Networking Letters 2024年第1期6卷 55-59页

作者： David, Fabio Rezende, Jose F. De Barbosa, Valmir C. Federal University of Rio de Janeiro Informatics and Computer Science Department Rio de Janeiro21941-914 Brazil Federal University of Rio de Janeiro Systems Engineering and Computer Science Program Centro de Tecnologia Rio de Janeiro21941-914 Brazil

Exact solutions of the Routing, Modulation, and Spectrum Allocation (RMSA) problem in Elastic Optical Networks (EONs), so that the number of admitted demands is maximized while those of regenerators and frequency slots used are minimized, require a complex ILP formulation taking into account frequency-slot continuity and contiguity. We introduce the first such formulation, ending a hiatus of some years since the last ILP formulation for a much simpler RMSA variation was introduced. By exploiting a number of problem and solver specificities, we use the NSFNET topology to illustrate the practicality and importance of obtaining exact solutions. © 2019 IEEE.

关键词： Topology

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Performance Evaluation of a Gan-HEMT-Based Converter for Concentrated Solar Tower under Harsh Weather Conditions

Performance Evaluation of a Gan-HEMT-Based Converter for Con...

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2023 IEEE International Conference on Environment and Electrical engineering and 2023 IEEE Industrial and Commercial Power systems Europe, EEEIC / I and CPS Europe 2023

作者： Hamanah, Waleed M. Abido, Mohammad A. Interdisciplinary Research Center of Renewable Energy and Power Systems Research Institute King Fahd University of Petroleum and Minerals Dhahran Saudi Arabia College of Engineering and Physics Department of Electrical Engineering King Fahd University of Petroleum and Minerals Dhahran Saudi Arabia

ISBN: (纸本)9798350347432

This research paper explores the practicality of using Gallium Nitride with high-electron-mobility transistors (GaN-HEMTs) based converter in solar power tower (SPT) tracking system. As a part of the SPT heliostat unit, the class-E converter is used to feed the DC motor, and the unit is tested under different loads. SPT drive using this technique reduces switching losses that affect the efficiency of the drive system without affecting the operation of the drive. This makes the SPT drive system more efficient, with less energy consumption and reduced operational costs. The performance of the drive system is demonstrated under different scenarios using MATLAB simulation. Experiments have been conducted on the proposed converters using hardware setup. Simulation results show accurate performance of the drive system and closely match the results of the hardware experiments. This demonstrates the validity of the proposed drive system for use in different applications. Comparing the proposed GaN E-HEMT converters with an identical Silicon (Si-IGBT) has been carried out. The comparison shows that it is a viable option for solar energy harvesting in the KSA hot weather conditions. This converter was found to be much more reliable than the traditional converter, making it an ideal choice for applications that require high temperature operation. Its impressive power-saving capabilities make it an even more attractive option. © 2023 IEEE.

关键词： Solar energy

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DARTS-Drone and Artificial Intelligence Reconsolidated Technological Solution for Increasing the Oil and Gas Pipeline Resilience

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International Journal of Disaster Risk Science 2022年第5期13卷 810-821页

作者： Premkumar Ravishankar Seokyon Hwang Jing Zhang Ibrahim X.Khalilullah Berna Eren-Tokgoz Department of Industrial and Systems Engineering Lamar UniversityBeaumontTX 77710USA Construction Management Program Lamar UniversityBeaumontTX 77710USA Department of Computer Science Lamar UniversityBeaumontTX 77710USA

The need for safe operation and effective maintenance of pipelines grows as oil and gas demand ***,it is increasingly imperative to monitor and inspect the pipeline system,detect causes contributing to developing pipeline damage,and perform preventive maintenance in a timely ***,pipeline inspection is performed at pre-determined intervals of several months,which is not sufficiently robust in terms of *** research proposes a drone and artificial intelligence reconsolidated technological solution(DARTS) by integrating drone technology and deep learning *** solution is aimed to detect the targeted potential root problems-pipes out of alignment and deterioration of pipe support system-that can cause critical pipeline failures and predict the progress of the detected problems by collecting and analyzing image data *** test results show that DARTS can be effectively used to support decision making for preventive pipeline maintenance to increase pipeline system s afety and resilience.

关键词： Artifcial intelligence Asset management Drone application Midstream industry Pipeline resilience Predictive maintenance

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Design of the Joint Structure Using a Magnetic Coupling with Linear Motion for Enhanced Braking systems

Design of the Joint Structure Using a Magnetic Coupling with...

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International Conference on Control, Automation and systems ( ICCAS)

作者： HyoJae Kang YongJae Lee SeoHyun Yoo DaeHee Han SeongTaek Im Min-Sung Kang Department of Interdisciplinary Robot Engineering Systems Hanyang University Ansan Korea School of Smart Convergence Engineering Hanyang University Ansan Korea

ISBN: (数字)9788993215380

ISBN: (纸本)9798331517939

This study introduces a robot joint structure utilizing magnetic coupling for non-contact power transmission and braking. The proposed design arranges permanent magnets on the motor shaft and the power-receiving shaft to transmit power via axial magnetic coupling mechanism. During braking, the structure allows linear movement to disengage from the motor shaft. This disengagement prevents power transmission during normal braking and utilizes a fixed magnet array on the opposite side for effective braking in a stopped state. In abnormal braking scenarios, the magnetic coupling characteristic ensuring power transmission is halted by disengaging the coupling, even if the motor continues to rotate, thereby avoiding continuous collisions typical in rigid coupling methods. The design was validated before experiments using magnetic films to verify the correct magnet arrangement. Experiments confirmed the power transmission in a noload state and demonstrated the braking test of disengagement action. Future research will focus on applying this structure to practical robotic applications, aiming to develop telescopic mechanisms or alternative motor configurations to maintain robust connections between moving components.

关键词： Couplings Shafts Magnetic films Resistance Design methodology Power transmission Motors Permanent magnets Reliability Robots

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