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检索条件"机构=Graduate Program of the Department of Engineering and Information and Communication Technologies"

共 174 条记录，以下是61-70 订阅

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Performance Evaluation of a VANET Simulation System Using NS-3 and SUMO Considering Number of Vehicles and Crossroad Scenario

Performance Evaluation of a VANET Simulation System Using NS...

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International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing (IMIS)

作者： Vladi Kolici Tetsuya Oda Yuki Sugihara Evjola Spaho Makoto Ikeda Leonard Barolli Faculty of Information Technologies Polytechnic University of Tirana Tirana Albania Graduate School of Engineering Fukuoka Institute of Technology (FIT) Fukuoka Japan Universiteti Politeknik i Tiranes Tirana AL Department of Information and Communication Engineering Fukuoka Institute of Technology (FIT) Fukuoka Japan

In this paper, we investigate the performance of HWMP, OLSR and DD protocols in a VANET crossroad scenario. The mobility patterns of vehicles are generated by means of SUMO (Simulation of Urban Mobility) and as communication protocol simulator is used NS3 (Network Simulator 3). For the simulations, we used IEEE 802.11p standard, Two Ray Ground Propagation Loss Model and sent multiple CBR flows over UDP between 20 source-destination pairs. We use Packet Delivery Ratio (PDR), throughput and delay as evaluation metrics. We compared the performance of three protocols and the simulation results shows that the DD protocol has better PDR and throughput compared with HWMP and OLSR protocol. For small number of vehicles, the HWMP protocol has low delay. However, for big number of vehicles, the DD protocol has low delay.

关键词： Vehicles Routing protocols Delays Peer-to-peer computing Throughput Simulation

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TreeXGNN: can gradient-boosted decision trees help boost heterogeneous graph neural networks?

TreeXGNN: can gradient-boosted decision trees help boost het...

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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Ming-Yi Hong Shih-Yen Chang Hao-Wei Hsu Yi-Hsiang Huang Chih-Yu Wang Che Lin Graduate Program of Data Science National Taiwan University and Academia Sinica Taiwan Graduate Institute of Communication Engineering National Taiwan University Taiwan Research Center for Information Technology Innovation Academia Sinica Taiwan Department of Electrical Engineering National Taiwan University Taiwan

Graph neural networks are a promising deep learning method that can apply graph structures to various tasks. In real-world scenarios, we often have heterogeneous graphs, wherein different node and edge types capture complex interactions between nodes. High-dimensional node features provide rich information about the target nodes. Conventional heterogeneous graph neural networks (HGNN) focus more on graph structures than node features and may have difficulties extracting knowledge from complex node features. In this study, we propose a novel framework, the tree-boosted heterogeneous graph neural network abbreviated as TreeXGNN, which could efficiently and automatically extract target node features via gradient-boosted decision trees (GBDT). It integrates community structure information with proper fusion modules and a shared feature space design on HGNN. We achieved state-of-the-art performance on the three well-known heterogeneous graph benchmark datasets, IMDB, DBLP, and ACM, and significantly improved performance compared to previous studies. Our work paves the foundation for integrating tree-based models to boost HGNNs for general community analysis.

关键词： Training Knowledge engineering Deep learning Signal processing Feature extraction Graph neural networks Decision trees

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MP3 Player Powered by Voice Commands

MP3 Player Powered by Voice Commands

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Pan American Health Care Exchanges, PAHCE

作者： O. F. Bertol P. Nohama Federal Technological University of Paraná (UTFPR) Group of Studies and Research in Information and Communication Technologies (GETIC) Pato Branco PR Brazil Federal Technological University of Paraná (UTPPR) Graduate Program in Electrical and Computer Engineering (CPGEI) Curitiba PR Brazil

This paper presents a “MP3 Player”, application that was modeled and developed to run on Windows 7 operating system in order to “play” music in MP3 format responding to voice commands. This feature allows the end ... 详细信息

关键词： Digital audio players information and communication technology Computers Operating systems Assistive technology Medical services

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Motivation and Engagement Factors of Undergraduate Students in Computing: A systematic mapping study

Motivation and Engagement Factors of Undergraduate Students ...

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Frontiers in Education (FIE) Conference

作者： Pablo Schoeffel Raul Sidnei Wazlawick Vinicius Faria Culmant Ramos Graduate Program in Computer Science Federal University of Santa Catarina Florianópolis Brazil Department of Informatics and Statistics Federal University of Santa Catarina Florianópolis Brazil Department of Information and Communication Technologies Federal University of Santa Catarina Araranguá Brazil

ISBN: (纸本)9781538611753;9781538611746

This paper presents a systematic mapping study on factors that affect motivation in computing undergraduate students. Although there are several initiatives to improve teaching and learning computing, the panorama is still negative. Motivation and engagement are usually singled out as reasons for students' retention or success, but we found a lack of standards in studies on motivation of computing students, and we have not found literature reviews about this subject. We identified twenty-nine (29) motivation factors presented in 32 selected studies. We divided the factors into five categories: student, professor/teaching, program/course/content, environment/university, and social aspects. The most mentioned factor was related to the teaching-learning strategies (37.5%), professor-student interaction (31.3%) and prior knowledge (31.3%). We also have identified that there is no convergence on literature about the identification and measurement of motivation and engagement. Another interesting aspect was that, despite the literature saying that intrinsic motivation has a greater impact on the student's results, many studies are being carried out considering extrinsic aspects. This shows the concern of the computing community regarding these aspects. However, there are only a few studies with controlled studies and evaluations on the impact of the factors in the motivation of students.

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Analysis of WMN-HC Simulation System Data Using Friedman Test

Analysis of WMN-HC Simulation System Data Using Friedman Tes...

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International Conference on Complex, Intelligent and Software Intensive Systems, CISIS

作者： Shinji Sakamoto Algenti Lala Tetsuya Oda Vladi Kolici Leonard Barolli Fatos Xhafa Graduate School of Engineering Fukuoka Institute of Technology (FIT) Higashi-Ku Japan Faculty of Information Technologies Polytechnic University of Tirana Tirana Albania Department of Information and Communication Engineering Fukuoka Institute of Technology (FIT) 3-30-1 Wajiro-Higashi Higashi-Ku Japan

With the fast development of wireless technologies, Wireless Mesh Networks (WMNs) are becoming an important networking infrastructure due to their low cost and increased high speed wireless Internet connectivity. In this paper, we used our proposed and implemented system based on Hill Climbing algorithm, called WMN-HC for mesh router node placement in WMNs. We analyze WMN-HC simulation system data for different number of nodes using Friedman test. We took into consideration 8, 16, 32, 64, 128 mesh routers and 24, 48, 96, 192, 384 mesh clients. We use Size of Giant Component (SGC) and Number of Covered Mesh Clients (NCMC) as metrics. From the analysis, for all cases, the p-value of SGC is more than 0.05. Thus, we adopt H0. On the other hand, for NCMC, we adopt H1 because the p-value is less than 0.05. Friedman test results show that there is not difference for SGC parameter. However, there is difference for NCMC parameter.

关键词： Simulation Analytical models Data models Electronic mail Wireless communication Measurement Ad hoc networks

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Using Multiple Active Teaching-Learning Approaches in Software Project Management: A longitudinal analysis of students’ motivation and learning

Using Multiple Active Teaching-Learning Approaches in Softwa...

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Frontiers in Education (FIE) Conference

ISBN: (纸本)9781538611753;9781538611746

This article describes the instructional design and evaluation of a course about project management in a software engineering post-graduation program using different teaching approaches and with a focus on active learning. We use four different approaches: digital educational game, non-digital educational game, hands-on activity, and experiential activity. Each one of the activities is evaluated for the aspects of motivation, user experience, and learning, following the MEEGA evaluation model and Cidral's experiential activity model. To verify the perceptions of students over time, we also assess graduated students that have concluded this course after two to four years, considering the aspects of motivation and learning. Results indicate a high level of approval for dynamic activities, regarding both motivation and learning. Activities with greater impact on motivation and learning are dynamics and educational games, group practical activities, and group theoretical activities. Among the factors that most influence students' motivation, we highlight: active learning, teacher knowledge, the taste of the area, and teaching methods. We realized that there was no significant variation in the perception of the activities by students over time.

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Implementation and Evaluation of a Small Size Omnidirectional Wheelchair

Implementation and Evaluation of a Small Size Omnidirectiona...

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International Conference on Advanced information Networking and Applications Workshops (AINAW)

作者： Keita Matsuo Yi Liu Donald Elmazi Leonard Barolli Kazunori Uchida Fukuoka Prefectural Fukuoka Technical High School Fukuoka Japan Graduate School of Engineering Fukuoka Institute of Technology (FIT) Fukuoka Japan Faculty of Information Technologies Polytechnic University of Tirana Albania Department of Information and Communication Engineering Fukuoka Institute of Technology (FIT) Fukuoka Japan

ISBN: (纸本)9781479917761

With the accelerating development of aged tendency of population and rapid growth in the number of the disabled caused by diseases or injuries, the wheelchair with good performance for the aged and disabled is attracting the attention from the society. A wheelchair can provide the user with many benefits, such as maintaining mobility, continuing or broadening community and social activities, conserving strength and energy, and enhancing quality of life. The wheelchair body must be compact enough to go through narrow doorways. The wheelchair must be wide enough to prevent the patient from falling on the floor. A large footprint is therefore desirable for stability and safety, while wheelchairs must conform to dimensional constraints. In this paper, we present the implementation and evaluation of an Omni directional wheelchair, which has a small size and can move easily in narrow spaces. In order to evaluate the implemented wheelchair, we carried out some experiments and discussed some implementation and application issues. The experimental results show that the implemented wheelchair in general works properly, but its still needs improvements.

关键词： Conferences

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A Reliable System for JXTA-Overlay P2P Platform Considering Number of Authentic Files, Security and QoS Parameters

A Reliable System for JXTA-Overlay P2P Platform Considering ...

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International Conference on Advanced information Networking and Applications (AINA)

作者： Yi Liu Donald Elmazi Shinji Sakamoto Leonard Barolli Fatos Xhafa Kazunori Uchida Graduate School of Engineering Fukuoka Institute of Technology (FIT) Fukuoka Japan Faculty of Information Technologies Polytechnic University of Tirana Bul Tirana Albania Department of Information and Communication Engineering Fukuoka Institute of Technology (FIT) Fukuoka Japan Department of Languages and Informatics Systems Technical University of Catalonia Barcelona Spain

The reliability of peers is very important for safe communication in Peer-to-Peer (P2P) systems. The reliability of a peer can be evaluated based on the reputation and interactions with other peers to provide different services. However, in order to decide the peer reliability there are needed many parameters, which make the problem NP-hard. In this paper, we propose and evaluate a new fuzzy-based reliability system for P2P communications in JXTA-Overlay platform. In our system, we considered three input parameters: Number of Authentic Files (NAF), Security (S) and Quality of Service (QoS) to decide the Peer Reliability (PR). We evaluate the proposed system by computer simulations. The simulation results have shown that the proposed system has a good performance and can choose reliable peers to connect in JXTA-Overlay platform.

关键词： Quality of service Conferences Fuzzy systems Barium

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Performance Evaluation of AODV, OLSR and HWMP Protocols in Ad-Hoc Networks and MANET Scenarios

Performance Evaluation of AODV, OLSR and HWMP Protocols in A...

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International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing (IMIS)

作者： Keita Matsuo Tetsuya Oda Donald Elmazi Shinji Sakamoto Leonard Barolli Fukuoka Prefectural Fukuoka Technical High School Fukuoka Japan Graduate School of Engineering Fukuoka Institute of Technology (FIT) Fukuoka Japan Faculty of Information Technologies Polytechnic University of Tirana Tirana Albania Department of Information and Communication Engineering Fukuoka Institute of Technology (FIT) Fukuoka Japan

Ad-Hoc Networks, Mobile Ad-Hoc Networks (MANETs), Wireless Mesh Networks (WMNs) are attracting a lot of attention from wireless network researchers, because of their potential use in several fields such as collaborative computing and communications. Considering mobility of the terminals, routing is a key process for operation of WMNs. In this paper, we present the implementation of a simulation system for these networks. We analyze the performance of AODV, OLSR and HWMP protocols considering static and mobile node scenarios. For evaluation we considered throughput, delay and remaining energy metrics. The simulation results show that for both scenarios, the AODV protocol performs better than other protocols. The delay of AODV in static scenario is lower than other protocols. However, the delay of HWMP is better than other protocols in mobile scenario. For all routing protocols, the remaining energy of mobile scenario is higher than static scenario.

关键词： Mobile communication Web and internet services Ubiquitous computing

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Cryptocurrencies for Smart Territories: an exploratory study

Cryptocurrencies for Smart Territories: an exploratory study

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International Joint Conference on Neural Networks (IJCNN)

作者： Alexandre C. Barbosa Thays A. Oliveira Vitor N. Coelho Graduate Program in Sustainable Territorial Development Universitá Degli Studi di Padova Italy and Katholieke Universiteit Leuven Belgium Universitè Paris 1 Pantheon-Sorbonne France Graduate Program in Engineering and Information and Communication Technologies Universitat Pompeu Fabra Barcelona Spain Institute of Computer Science Universidade Federal Fluminense Niterói RJ Brazil

The smart city debate will still be the scope of business, policy-making and territorial planning in the following years. Based on that, the paper aims to propose an interdisciplinary conceptualization of smart territories. The goal is to promote the contrary movement of megacities creation and also consolidate the geographical aspect of smartness. The concept was formulated based on the elements of sustainable territorial development, strategic spatial planning and smart governance. In addition, taking hand of a parallel literature review, the study explores the potential of creating complementary cryptocurrencies as a strategy of territorial planning. This term was built based on already existing complementary currency systems in distributed ledger technologies scope. The idea provided presents a great potential for poverty alleviation by bringing together financial and digital inclusion.

关键词： Planning Smart cities Collaboration Decision making Government Cryptography Cultural differences

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