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arXiv 2021年

作者： Mershad, Khaleel Dahrouj, Hayssam Sarieddeen, Hadi Shihada, Basem Al-Naffouri, Tareq Alouini, Mohamed-Slim The Department of Computer and Communications Engineering Arts Sciences & Technology University Beirut Lebanon The Division of Computer Electrical and Mathematical Sciences and Engineering King Abdullah University of Science and Technology Thuwal23955-6900 Saudi Arabia

Augmenting ground-level communications with flying networks, such as the high-altitude platform system (HAPS), is among the major innovative initiatives of the next generation of wireless systems (6G). Given HAPS quasi-static positioning at the stratosphere, HAPS-to-ground and HAPS-to-air connectivity frameworks are expected to be prolific in terms of data acquisition and computing, especially given the mild weather and quasi-constant wind speed characteristics of the stratospheric layer. This paper explores the opportunities stemming from the realization of cloud-enabled HAPS in the context of telecommunications applications and services. The paper first advocates for the potential physical advantages of deploying HAPS as flying data-centers, also known as super-macro base stations. The paper then presents the merits that can be achieved by integrating various cloud services within the HAPS, and the corresponding cloud-type applications that would utilize the HAPS for enhancing the quality, range, and types of offered services. The paper further sheds light on the challenges that need to be addressed for realizing practical cloud-enabled HAPS, mainly, those related to the high energy, processing power, quality of service (QoS), and security considerations. Finally, the paper discusses some open issues on the topic, namely, HAPS mobility and message routing, HAPS security via blockchain and machine learning, artificial intelligence-based resource allocation in cloud-enabled HAPS, and integration with vertical heterogeneous networks. © 2021, CC BY.

关键词： Web services

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Front Cover: Microkinetic Modeling to Decode Catalytic Reactions and Empower Catalytic Design (ChemCatChem 13/2024)

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ChemCatChem 2024年第13期16卷

作者： Shekhar R. Kulkarni Gontzal Lezcano Vijay Kumar Velisoju Natalia Realpe Pedro Castaño Multiscale Reaction Engineering KAUST Catalysis Center (KCC) King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Chemical Engineering Program Physical Science and Engineering (PSE) Division King Abdullah University of Science and Technology

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A Study on “Blockchain-Enabled Digital Twins: The Next Wave of Industrial Transformation with Future Research Challenges”

A Study on “Blockchain-Enabled Digital Twins: The Next Wave...

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International Conference on computer, Information and Telecommunication Systems (CITS)

作者： Sanjeev Kumar Dwivedi Mohammad S. Obaidat Mansi Mittal Nilesh Ranjan Honey Tyagi Ruhul Amin Kuei-Fang Hsiao Madhav Institute of Technology & Science (MITS) Gola ka Mandir Gwalior Madhya Pradesh India King Abdullah II School of Information Technology University of Jordan Amman Jordan University of Science and Technology Beijing Beijing China SRM University SRM Nagar Kattankulathur TN India eAmity University Noida UP India Department of Information Technology KIET Group Of Institutions Delhi-NCR Ghaziabad India Department of Computer Science and Engineering DSPM IIIT Naya Raipur (IIIT-NR) Chattisgarh India KASIT The University of Jordan Amman Jordan

ISBN: (数字)9798350359091

ISBN: (纸本)9798350359107

A new era of creativity, efficiency, and optimisation has emerged across a number of industrial sectors with the introduction of digital twin technologies. To enhance their capabilities, digital twins are frequently combined with cutting-edge technologies like blockchain, artificial intelligence (AI), and the Internet of Things (IoT). This paper summarises and evaluates the present status of research and applications of blockchain enabled digital twins in the context of industrial sectors. This review highlights the benefits of blockchain based digital twins in the different industrial domains such as production manufacturing, product data management, construction project management and, healthcare. Furthermore, the paper addresses the challenges and future directions of digital twin adoption in industries, discussing interoperability, data security, and the need for standardized frameworks.

关键词： Reviews Project management Production Medical services Digital twins Blockchains Telecommunications

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Thermal simulation of microwave kiln based on multiphysics

Thermal simulation of microwave kiln based on multiphysics

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International Technical Conference o Circuits/Systems, computers and Communications (ITC-CSCC)

作者： Thodsaphon Jansaengsuk Sorathon Pattanapichai Piyawong Poopanya Nonthawat Phimphakan Jatuporn Thongsri Computer Simulation in Engineering Research Group College of Advanced Manufacturing Innovation King Mongkut's Institute of Technology Ladkrabang Bangkok Thailand Program of Physics Faculty of Science Ubon Ratchathani Rajabhat University Ubonratchatani Thailand

A microwave kiln, made of silicon carbide and ceramic fiber, commonly employs in a household glassware production process. In this process, when the kiln was in a microwave oven, a microwave transmitted to the kiln generating a high temperature to fuse the glass inside. This article presents a thermal simulation to investigate the temperature inside the kiln based on multiphysics consisting of a high-frequency structure simulator (HFSS) and computational fluid dynamics (CFD). The multiphysics results revealed the temperature inside the kiln in a transient state, consistent with the experimental results. As expected, the temperature increased with the increasing time of the process. Significantly, the silicon carbide had higher temperatures than the ceramic fiber; therefore, silicon carbide is a crucial material for generating heat inside the kiln. In addition, the temperature-increasing rate (TIR) inside the kiln depended on the kiln's thickness (Th). As a result, the thinner Th provided better TIR. The research findings can be applied to develop a high-efficacy household glassware production process.

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Bionomic Characterisation of Benthic Communities on Rocky Shores of Lipsi Island (Aegean Sea, Greece)

Bionomic Characterisation of Benthic Communities on Rocky Sh...

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IEEE International Workshop on Metrology for the Sea;Learning to Measure Sea Health Parameters (MetroSea)

作者： Francesca Lauricella Maria Morán-Garcìa Maurice Calton Seal Anastasia Miliou Laura Macrina Dipartimento di Scienze della Terra dell'Ambiente e della Vita Università degli Studi di Genova Genova Italy Archipelagos Institute of Marine Conservation Pythagorio Greece Marine Science Program Biological and Environmental Science and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia Archipelagos Institute of Maarine Conservation Samos Greece

ISBN: (数字)9798350379006

ISBN: (纸本)9798350379013

Rocky shores are important transitional environments between terrestrial and marine ecosystems. Although the Greek coastline is the largest in the Mediterranean basin, scant information is available regarding the benthic communities populating its shores. Here, we characterised the benthic communities inhabiting the rocky shores of Lipsi Island (Greece). The littoral zones of nine different sites were surveyed by randomly selecting 10 photo-quadrats from each zone, and estimating species richness, coverage, and abundance of the OTUs (Operational Taxonomic Units) recorded. Data analysis consisted of a comparison among the littoral zones, followed by comparisons between sheltered and exposed sites. A total of 44 OTU s were identified with the presence of a single Non-Indigenous Species (NIS), the algae Caulerpa cylindracea. The results showed a steep increase in species richness and coverage from the supralittoral to the upper infralittoral zone, most likely due to the mild environmental conditions of this zone in comparison with the other two zones. Species richness, mean coverage and abundance of organisms were found to be higher at sheltered sites, except for the supralittoral zone, where Melarhaphe neritoides was more abundant at exposed sites, most likely due to the continuous wetting of spraying water. Filter-feeders and species well adapted to high hydrodynamic conditions were mostly found at the exposed sites, while turf showed a higher coverage at sheltered sites, underlining the effect of wave exposure in shaping the composition of shallow benthic communities. This study provides a first description of the benthic communities inhabiting the rocky shores of Lipsi Island, establishing an important baseline to assess potential future alterations and develop conservation measures.

关键词： Coastlines Data analysis Conferences Sea measurements Spraying Algae Metrology Marine ecosystems Hydrodynamics Environmental management

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Room-temperature multiple ligands-tailored SnO_(2) quantum dots endow in situ dual-interface binding for upscaling efficient perovskite photovoltaics with high V_(OC)

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Light(science & Applications) 2021年第12期10卷 2467-2481页

作者： Zhiwei Ren Kuan Liu Hanlin Hu Xuyun Guo Yajun Gao Patrick W.K.Fong Qiong Liang Hua Tang Jiaming Huang Hengkai Zhang Minchao Qin Li Cui Hrisheekesh Thachoth Chandran Dong Shen Ming-Fai Lo Annie Ng Charles Surya Minhua Shao Chun-Sing Lee Xinhui Lu Frédéric Laquai Ye Zhu Gang Li Department of Electronic and Information Engineering Research Institute for Smart Energy(RISE)Guangdong-Hong Kong-Macao(GHM)Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and DevicesThe Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Department of Electrical and Computer Engineering Nazarbayev UniversityNur-SultanKazakhstan The Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518057China Hoffmann Institute of Advanced Materials Shenzhen Polytechnic7098 Liuxian BoulevardShenzhen 518055China Department of Applied Physics The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Department of Chemical and Biological Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina King Abdullah University of Science and Technology(KAUST) KAUST Solar Center(KSC)Physical Sciences and Engineering Division(PSE)Material Science and Engineering Program(MSE)Thuwal 23955-6900Kingdom of Saudi Arabia Department of Physics The Chinese University of Hong KongShatin 999077 Hong KongChina Center of Super-Diamond and Advanced Films(COSDAF) Department of ChemistryCity University of Hong KongHong KongChina

The benchmark tin oxide(SnO_(2))electron transporting layers(ETLs)have enabled remarkable progress in planar perovskite solar cell(PSCs).However,the energy loss is still a challenge due to the lack of“hidden interface”*** report a novel ligand-tailored ultrafine SnO_(2) quantum dots(QDs)via a facile rapid room temperature ***,the ligand-tailored SnO_(2) QDs ETL with multi-functional terminal groups in situ refines the buried interfaces with both the perovskite and transparent electrode via enhanced interface binding and perovskite *** novel ETLs induce synergistic effects of physical and chemical interfacial modulation and preferred perovskite crystallization-directing,delivering reduced interface defects,suppressed non-radiative recombination and elongated charge carrier *** conversion efficiency(PCE)of 23.02%(0.04 cm^(2))and 21.6%(0.98 cm^(2),V_(OC) loss:0.336 V)have been achieved for the blade-coated PSCs(1.54 eV E_(g))with our new ETLs,representing a record for SnO_(2) based blade-coated ***,a substantially enhanced PCE(V_(OC))from 20.4%(1.15 V)to 22.8%(1.24 V,90 mV higher V_(OC),0.04 cm^(2) device)in the blade-coated 1.61 eV PSCs system,via replacing the benchmark commercial colloidal SnO_(2) with our new ETLs.

关键词： perovskite interface quantum

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Inventions, innovations, and new technologies: Solar Desalination

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Solar Compass 2023年 5卷

作者： Wijewardane, Samantha Ghaffour, Noreddine Clean Energy Research Center University of South Florida Tampa FL United States Environmental Science & Engineering (EnSE) Program Water Desalination & Reuse Center (WDRC) Biological & Environmental Science & Engineering (BESE) Division King Abdullah University of Science & Technology (KAUST) Thuwal 23955-6900 Saudi Arabia

This article is a brief review of inventions, innovations, and commercialization aspects of solar desalination technology for clean water supply. It is estimated that by the year 2025, nearly two-thirds of the global population will be affected by clean water scarcity. Solar desalination is one of the most sustainable ways of facing this global challenge with emerging technological advancements. Highly efficient interfacial solar evaporation that localizes the heat on the evaporating surface has attracted tremendous research interest within the last few years. In addition, notable innovations can be found in adsorption desalination and energy-efficient freeze desalination. The mini review is followed by a list of notable recent patents and articles. However, the list is by no means exhaustive or complete, and quite possibly some important patents and articles are not cited. The mini review and the lists support the objective of this section: to draw attention to the topic of inventions, innovations and new technologies, which can be a major contributor to the global goal of net zero carbon emissions. © 2023 The Author(s)

关键词： Floating solar stills Freeze desalination Interfacial solar evaporation Patents

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Correction: Unbiased and multilevel methods for a class of diffusions partially observed via marked point processes

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Statistics and Computing 2024年第6期34卷 1-1页

作者： Alvarez, Miguel Jasra, Ajay Ruzayqat, Hamza Applied Mathematics and Computational Science Program Computer Electrical and Mathematical Sciences and Engineering Division King Abdullah University of Science and Technology Thuwal Saudi Arabia School of Data Science The Chinese University of Hong Kong Shenzhen China

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Design of a Secure Machine Learning-Based Malware Detection and Analysis Scheme

Design of a Secure Machine Learning-Based Malware Detection ...

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Communications, Computing, Cybersecurity, and Informatics (CCCI), International Conference on

作者： Pankaj Kumar Mohammad S. Obaidat Piyush Pandey Mohammad Wazid Ashok Kumar Das Devesh Pratap Singh Department of Computer Science and Engineering Graphic Era Deemed to be University Dehradun India King Abdullah II School of Information Technology The University of Jordan Amman Jordan School of Computing SRM University Jordan University of Science and Technology Beijing Beijing China School of Computing SRM University Kattankulathur TN India Center for Security Theory Algorithmic Research International Institute of Information Technology Hyderabad India

Today's world is rapidly growing towards the advanced concept of technology. technology nowadays is at its peak of development and has great advantages in all fields of work, whether it is in industrial automation, farming, weather forecasting, or disease detection and control. Despite its great advantages, it does have its negative side because a major population is using technology and general-purpose computing devices (i.e., desktops, laptops, smartphones, tablets, etc.). Therefore, most of their personal data is available online. The data is constantly in danger of getting stolen by malicious actors (i.e., hackers), who can find a way to get their hands on this data and then use it for their personal gain (i.e., money-making). The best-known technique to get this information is by using malware exploitation on the machine of the target. Malware is an executable or a binary that is malicious in nature. It may have various devastating effects, and in order to detect and make the system defensive, we need to propose a scheme to detect the malware in the system, analyze the particular file, and then mitigate it. In this paper, we propose a secure machine learning-based malware detection and analysis scheme (in short, SML-MDA). The conducted security analysis and formal security verification of the proposed SMLMDA prove its security against various types of potential attacks. The proposed SML-MDA is then compared with the other similar competing schemes, and its performance has been found to be better in terms of various performance metrics like accuracy and F1-score.

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The Fabrication of Gan/Ingan Nano-Pyramids Photoanode and its Enhanced Water Splitting Performance

SSRN

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SSRN 2023年

作者： Xi, Xin Zhao, Lixia Cao, Haicheng Li, Tuo Liu, Kai Su, Kang Li, Yamin Guo, Jianwen State Key Laboratory of High-end Server & Storage Technology Inspur Group Company Limited. Beijing100089 China Electronic Information Industry Co. Ltd. Shandong Jinan100089 China Institute of Semiconductor CAS Beijing100871 China School of Electrical and Electronic Engineering Tiangong University Tianjin300387 China Electrical and Computer Engineering CEMSE Division King Abdullah University of Science and Technology Thuwal23955 Saudi Arabia

In this paper, we fabricated a GaN/InGaN nano-pyramid photoanode using the selective area growth (SAG) method. This method achieved high water splitting performance with photocurrent enhanced about 6 times compared to planar GaN. The impressive enhancement of water splitting performance is mainly due to the In-rich InGaN grown on the (10-11) plane, the fast separation of carriers caused by a p-n junction, and the large specific surface area that increases light absorption. Moreover, the thin InGaN layer of 3 nm can facilitate the transport of carriers through the GaN barrier by enabling quantum tunneling current. All these significantly contribute to the remarkable enhancement of water splitting performance for GaN/InGaN nano-pyramids. Our work provides a new approach for using the GaN material in highly efficient water splitting applications. © 2023, The Authors. All rights reserved.

关键词： Fabrication

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