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2024 International Conference on Advanced Technologies for Communications, ATC 2024

作者： Kitagawa, Masaki Kojima, Toshiharu Graduate School of Informatics and Engineering The University of Electro-Communications Department of Computer and Network Engineering 1-5-1 Chofugaoka Tokyo Chofu182-8585 Japan

ISBN: (纸本)9798350353983

In helicopter satellite communications, the periodic blockage of the transmission channel arises due to rotor blades. Modified Walsh-Hadamard code division multiplexing (MWHCDM) overcomes the periodic blockage. In MWHCDM, estimating the symbol timing offset (STO) is necessary to perform demultiplexing. The carrier frequency offset (CFO) significantly degrades the accuracy of STO estimation. Thus, STO estimation requires estimating and removing the CFO, although CFO estimation is only possible without STO. This paper proposes a joint CFO and STO estimation method to resolve this dilemma, combining the CFO and STO estimation to complement each other. computer simulation shows that the proposed method accurately estimates both CFO and STO. © 2024 IEEE.

关键词： Frequency estimation

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AFSTGCN:Prediction for multivariate time series using an adaptive fused spatial-temporal graph convolutional network

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Digital Communications and Networks 2024年第2期10卷 292-303页

作者： Yuteng Xiao Kaijian Xia Hongsheng Yin Yu-Dong Zhang Zhenjiang Qian Zhaoyang Liu Yuehan Liang Xiaodan Li School of Information and Control Engineering China University of Mining and TechnologyXuzhou221116China Department of Informatics University of LeicesterLeicesterLE17RHUK The Affiliated Changshu Hospital of Soochow University Changshu215500China School of Computer Science and Engineering Changshu Institute of TechnologySuzhou215500China

The prediction for Multivariate Time Series(MTS)explores the interrelationships among variables at historical moments,extracts their relevant characteristics,and is widely used in finance,weather,complex industries and other ***,it is important to construct a digital twin ***,existing methods do not take full advantage of the potential properties of variables,which results in poor predicted *** this paper,we propose the Adaptive Fused Spatial-Temporal Graph Convolutional Network(AFSTGCN).First,to address the problem of the unknown spatial-temporal structure,we construct the Adaptive Fused Spatial-Temporal Graph(AFSTG)***,we fuse the spatial-temporal graph based on the interrelationship of spatial ***,we construct the adaptive adjacency matrix of the spatial-temporal graph using node embedding ***,to overcome the insufficient extraction of disordered correlation features,we construct the Adaptive Fused Spatial-Temporal Graph Convolutional(AFSTGC)*** module forces the reordering of disordered temporal,spatial and spatial-temporal dependencies into rule-like *** dynamically and synchronously acquires potential temporal,spatial and spatial-temporal correlations,thereby fully extracting rich hierarchical feature information to enhance the predicted *** on different types of MTS datasets demonstrate that the model achieves state-of-the-art single-step and multi-step performance compared with eight other deep learning models.

关键词： Adaptive adjacency matrix Digital twin Graph convolutional network Multivariate time series prediction Spatial-temporal graph

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Exploring the dynamics of creative tourism:A tourist-centric perspective to achieve economic sustainable development

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Journal of Mountain Science 2025年第1期22卷 278-295页

作者： ZOU Fuxia Atefeh AHMADI DEHRASHID Mehmet AKIF CIFCI Emrah ARSLAN Nina KHALIGHI College of Tourism and Aviation Management Hunan Women's UniversityChangsha 410004China Faculty of Natural Resources Department of ClimatologyUniversity of KurdistanSanandaj ***Iran Member of Department of Zrebar Lake Economic-social Research Kurdistan Studies InstituteUniversity of KurdistanSanandaj ***Iran Department of Computer Engineering Bandirma Onyedi Eylul UniversityBalikesir 10200Türkiye Engineering and Informatics Department Klaipėdos ValstybinėKolegija/Higher Education InstitutionKlaipeda 92294Lithuania Engineering and Informatics Department KTO KaratayKonya 42020Türkiye Department of Urban Planning and Design Faculty of Art and ArchitectureUniversity of KurdistanSanandaj ***Iran

Creative tourism is a dynamic and innovative approach to tourism,which points out the importance of people's active participation and their immersion in such *** a vernacular context,it should attract people(local and tourists)attention to accomplish its main *** its rich cultural and natural assets,Kurdistan province faces several challenges that impact its tourism *** achieve that,the study uses quantitative approach to thoroughly analyze and evaluate the components of creative tourism in this *** research focuses on tourists who visited the province's ten towns during the spring and summer of *** collection utilized a Likert-scale questionnaire ranging from"very good"to"very poor".The study employed a semistructured questionnaire developed through qualitative interviews alongside a researcher-made questionnaire validated by experts from the University of *** qualitative questionnaire achieved a high-reliability score of 93%using Cronbach's alpha ***-depth interviews and literary research were conducted to identify creative tourism components and indicators,informing the development of a quantitative *** analysis was performed using SPSS 20 and AMOS software to scrutinize the survey findings,providing insights into enhancing creative tourism strategies in Kurdistan *** results reveal the varying significance of these dimensions,with the cultural dimension identified as the most crucial(factor loading:0.95),followed by the social(0.92),economic(0.88),and managerial/political dimensions(0.83).The study highlights the importance of cultural planning,community engagement,and infrastructural support in fostering creative ***,it explores the impact of creative industries,such as music and arts rooted in Kurdish culture,on tourism *** diversification and spatialphysical considerations are critical factors in enhancing Kurdistan's appeal as a creative

关键词： Creative tourism Tourism development Local and regional development Structural equation Iran

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Systematic Approach for Securing and Preserving the Privacy of Blockchain Systems 18

Systematic Approach for Securing and Preserving the Privacy ...

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18th INDIAcom;11th International Conference on Computing for Sustainable Global Development, INDIACom 2024

作者： Rajamanickam, Ramya Chaturvedi, Saumya National Informatics Centre Lodhi Road New Delhi India Sharda University School of Engineering and Technology Department of Computer Science and Engineering Greater Noida India

ISBN: (纸本)9789380544519

Blockchain technology provides a decentralized, irreversible, and verifiable ledger for recording digital asset transactions. This technology has the potential to drastically alter several cutting-edge scenarios. But recently, blockchain has found itself under scrutiny over security and privacy. Multiple heists and hacks have taken place in blockchain systems in this short period of blockchain evolution. Innovative secure privacy blockchain solutions utilizing the crypto-privacy approaches have become the need of the hour to handle privacy issues. The below work discusses ways to bring in state-of-the-art technologies to exculpate the concerns raised on privacy and security uncertainties. Here, the primary emphasis is given to combat the chaos arising in blockchain privacy and security thus contributing to the users and developers of blockchain. We categorically explain that blockchain alone is not sufficient in the current era of heists and attacks, giving the recommendation of the framework in the coming sections, thereby placing the techniques for privacy-preserving blockchain tightly bound to the system. © 2024 Bharati Vidyapeeth, New Delhi.

关键词： Blockchain Blockchain Security Privacy Privacy-Preserving

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Behavior Trees and State Machines in Robotics Applications

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IEEE Transactions on Software engineering 2023年第9期49卷 4243-4267页

作者： Ghzouli, Razan Berger, Thorsten Johnsen, Einar Broch Wasowski, Andrzej Dragule, Swaib Chalmers University of Technology Department of Computer Science and Engineering Gothenburg40530 Sweden Ruhr University Bochum Faculty of Computer Science Bochum44801 Germany Chalmers University of Gothenburg Department of Computer Science and Engineering Gothenburg40530 Sweden University of Oslo Department of Informatics Oslo0316 Norway IT University of Copenhagen Software Development Group Copenhagen2300 Denmark

Autonomous robots combine skills to form increasingly complex behaviors, called missions. While skills are often programmed at a relatively low abstraction level, their coordination is architecturally separated and often expressed in higher-level languages or frameworks. State machines have been the go-to language to model behavior for decades, but recently, behavior trees have gained attention among roboticists. Originally designed to model autonomous actors in computer games, behavior trees offer an extensible tree-based representation of missions and are claimed to support modular design and code reuse. Although several implementations of behavior trees are in use, little is known about their usage and scope in the real world. How do concepts offered by behavior trees relate to traditional languages, such as state machines? How are concepts in behavior trees and state machines used in actual applications? This paper is a study of the key language concepts in behavior trees as realized in domain-specific languages (DSLs), internal and external DSLs offered as libraries, and their use in open-source robotic applications supported by the Robot Operating System (ROS). We analyze behavior-tree DSLs and compare them to the standard language for behavior models in robotics: state machines. We identify DSLs for both behavior-modeling languages, and we analyze five in-depth. We mine open-source repositories for robotic applications that use the analyzed DSLs and analyze their usage. We identify similarities between behavior trees and state machines in terms of language design and the concepts offered to accommodate the needs of the robotics domain. We observed that the usage of behavior-tree DSLs in open-source projects is increasing rapidly. We observed similar usage patterns at model structure and at code reuse in the behavior-tree and state-machine models within the mined open-source projects. We contribute all extracted models as a dataset, hoping to inspire the commu

关键词： Modeling languages

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Neural Collaborative Filtering for Improved Tourism Destination Recommendation 8

Neural Collaborative Filtering for Improved Tourism Destinat...

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8th International Conference on Information Technology, Information Systems and Electrical engineering, ICITISEE 2024

作者： Marzuki, Imam Hariadi, Mochamad Rachmadi, Reza Fuad Arif, Yunifa Miftahul Institut Teknologi Sepuluh Nopember Department of Electrical Engineering Surabaya Indonesia Institut Teknologi Sepuluh Nopember Department of Electrical Engineering Department of Computer Engineering Indonesia Universitas Islam Negeri Maulana Malik Ibrahim Department of Informatics Engineering Department of Electrical Engineering Malang Indonesia

ISBN: (纸本)9798350368970

This study evaluates the effectiveness of Neural Collaborative Filtering (NCF) in enhancing tourism destination recommendation. The researchers employed a methodology encompassing a comprehensive literature review, integration of user preference dataset, and the application of the NCF algorithm. The evaluation utilized MAE and RMSE metrics, demonstrating significant improvement compared to the Neural Network method. The results highlight the superior accuracy and reliability of the NCF-based recommendation system in providing tourism destination recommendation. This study emphasizes the practical significance of implementing NCF, offering a more sophisticated and efficient approach to enhancing user experience. The implication of this research contribute to academic needs and are expected to provide practical benefits for recommendation system in the tourism sector. The researchers elucidate critical differences in the NCF algorithm compared to benchmarks, and the introduction explores gaps in NCF applications for tourism, reinforcing the importance of this study. Experimental results show that the NCF model achieved an MAE of 0.306 and an RMSE of 0.371, outperforming the Neural Network's MAE of 0.794 and RMSE of 0.960, confirming superior predictive accuracy. © 2024 IEEE.

关键词： Collaborative filtering

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Selected Mapping Without Side Information for PAPR Reduction in Modified Walsh-Hadamard Code Division Multiplexing

Selected Mapping Without Side Information for PAPR Reduction...

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2024 International Conference on Advanced Technologies for Communications, ATC 2024

作者： Maruyama, Daihi Kojima, Toshiharu Graduate School of Informatics and Engineering The University of Electro-Communications Department of Computer and Network Engineering 1-5-1 Chofugaoka Tokyo Chofu182-8585 Japan

ISBN: (纸本)9798350353983

Modified Walsh-Hadamard code division multiplexing (MWHCDM) is effective for helicopter satellite communications, where the rotor blades block the transmission channel pe-riodically. This paper addresses reducing peak-to-average power ratio (PAPR) for MWHCDM, applying a selected mapping (SLM) method without side information, proposed for orthogonal frequecy division multiplexing (OFDM) previously, to MWHCDM. The SLM method is especially suitable for the primary modu-lation of quaternary phase-shift keying (QPSK), although the primary modulation of MWHCDM is binary phase-shift keying (BPSK). A novel multiplexing processing based on the structure of MWHCDM signals resolves this mismatch. In addition, introducing amplitude information to the evaluation function employed for blind estimation of phase sequence enhances the estimation performance. computer simulation shows that the proposed SLM method achieves excellent PAPR reduction and phase sequence estimation performance, causing no degradation in bit error rate (BER) performance. © 2024 IEEE.

关键词： Bit error rate

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A Study on Modified Walsh-Hadamard Code Division Multiplexing with Enhanced Anti-Periodic-Blockage Capability

A Study on Modified Walsh-Hadamard Code Division Multiplexin...

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2024 International Conference on Advanced Technologies for Communications, ATC 2024

作者： Kojima, Toshiharu Sotome, Shinya Graduate School of Informatics and Engineering The University of Electro-Communications Department of Computer and Network Engineering 1-5-1 Chofugaoka Tokyo Chofu182-8585 Japan

ISBN: (纸本)9798350353983

In helicopter satellite communications, the periodic blockage (PB) of the transmission channel occurs due to rotor blades. Modified Walsh-Hadamard code division multiplexing (MWHCDM) is suitable for helicopter satellite communications because it has the anti-PB capability, corresponding to 2-branch time diversity. This paper proposes MWHCDM with enhanced anti-PB capability. The proposed MWHCDM implicitly performs 4-branch time diversity processing through multiplexing by trading off with spectral efficiency. computer simulations show that the proposed MWHCDM achieves excellent bit error rate (BER) performance close to the lower bound in the PB channel with zero-forcing (ZF) and minimum mean square error (MMSE) detection. As a result, the proposed MWHCDM outperforms the conventional MWHCDM and the simple (non-multiplexed) 4-branch time diversity. © 2024 IEEE.

关键词： Satellite communication systems

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Developing Energy Autonomous and Cable-less Multi-gateway LoRa Networks

Developing Energy Autonomous and Cable-less Multi-gateway Lo...

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2023 IEEE International Conference on Communications, Computing, Cybersecurity and informatics, CCCI 2023

作者： Valkanis, Anastasios Beletsioti, Georgia A. Kantelis, Konstantinos Nicopolitidis, Petros Papadimitriou, Georgios Louta, Malamati Aristotle University of Thessaloniki Department of Informatics Thessaloniki Greece University of Western Macedonia Faculty of Engineering Department of Electrical and Computer Engineering Kozani Greece

ISBN: (纸本)9798350302561

Long Range (LoRa) networks are a reliable and efficient solution to serve Internet of Things (IoT) applications in a long range rural and forest areas. The capability of the gateways, both for wireless connection with the backbone network and be powered by renewable energy resources, makes possible the development of energy autonomous and without the need of cabling LoRa networks. This perspective greatly facilitates the network installation in hard-to-reach areas, as well as reducing their operating costs. An important obstacle, for the operation of energy autonomous LoRa networks, is the need for continuous operation of the gateways defined by the LoRaWAN protocol, leading to increased power consumption. For this reason, it is necessary the creation of a protocol that will reduce the energy consumption of the gateways, while maintaining the quality of the services provided in the IoT applications. In this paper we present a new hybrid protocol for energy autonomous and cable-less multi-gateway LoRa networks. The simulation results showed that the proposed protocol ensures a more than 50% reduced energy consumption for the gateways, as well as increased efficiency and reliability compared to the existing protocol, at the cost of slightly increased delay in data transmission. © 2023 IEEE.

关键词： Energy efficiency

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Decision Making in Precision Agriculture - The Case of VEL OS Intelligent Decision Support System 14

Decision Making in Precision Agriculture - The Case of VEL O...

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14th International Conference on Information, Intelligence, Systems and Applications, IISA 2023

作者： Theodorou, Dimitrios Mantas, Nikolaos Karampelia, Ioanna Dimokas, Nikos Kyriakidis, Thomas Louta, Malamati University of Western Macedonia Faculty of Engineering Department of Electrical and Computer Engineering Kozani Greece University of Western Macedonia Department of Informatics Kastoria Greece

ISBN: (纸本)9798350318067

Precision agriculture includes Integrated Pest Management (IPM), which focuses on preventing and controlling pests and diseases through a combination of biological, traditional, and chemical practices. An Intelligent Decision Support System (VELOS) was developed for plant protection in bean cultivations in the Prespa region of Greece. VELOS utilizes remote sensing, GPS mapping, and sensor technologies to assist in collecting and generating massive amounts of high-quality data. This information is then used to monitor crop development, detect pests and diseases, and assess the efficacy of pest management strategies. The collected information is exploited by the Decision Support Systems (DSS) at the core of IPM. The DSS assists in saving resources and minimizing the overall cost while improving overall pest management efficiency. It also provides an intelligent decision support mechanism for pest management methods, such as which pesticides to apply and when to use them. A DSS can also help pest control practitioners monitor the effectiveness of pest management measures and modify them appropriately. This feedback loop can provide effective disease management, avoiding the danger of serious crop losses or property damage. The proposed Intelligent Decision Support System (VELOS) is responsible for generating suitable plant protection recommendations as well as scheduling their implementation. © 2023 IEEE.

关键词： Precision agriculture

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