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Workflow management applied to information systems in tourism

Journal of Travel Research 2000年第2期39卷 220-226页

作者： Caro, José L. Guevara, Antonio Aguayo, Andrés Gálvez, Sergio School of Tourism Malaga University Spain Dept. Info. Syst. Appl. to Tourism School of Tourism and Databases Dept. of Computer Science Studies Department of Information Systems Department of Computer Science Information Technology in Tourism Dept. Info. Syst. Appl. to Tourism Sch. of Tourism and Operating Syst. Malaga University Spain Department of Databases Tourism Sector Malaga University Spain

Nowadays, Workflow Management offers many advantages to the tourism industry due to the high degree of competition existing in this field and the need to quickly develop new products, offers, and services. This need for flexibility cannot be achieved without improving the processes involved in the information systems. Workflow technology facilitates this constant evolution, providing modeling methodologies and software to support all the processes taking place in a given company. This article studies the application of such technologies to businesses belonging to the tourism sector and focuses on the improvement of information systems to obtain higher customer satisfaction. To achieve this objective, a modeling methodology oriented toward customer satisfaction is presented. This is applied to the set of information systems involved in making a trip by plane and more specifically to aspects such as booking from intermediary companies and the information systems used by airline companies in airports.

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Deadlock-free routing in irregular networks with dynamic reconfiguration 3rd

Deadlock-free routing in irregular networks with dynamic rec...

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3rd International Workshop on Communication, architecture and Applications for Network-based Parallel Computing , CANPC 1999

作者： Casado, Rafael Quiles, Francisco J. Sánchez, José L. Duato, José Dept. of Computer Science Escuela Politécnica Superior de Albacete Universidad de Castilla-La Mancha Albacete02071 Spain Dept. of Information Systems and Computer Architecture Universidad Politécnica de Valencia P.O.B. 22012 Valencia46071 Spain

ISBN: (纸本)3540659153

High-speed local area networks (LANs) support many distributed applications. These applications require some system availability guarantees. However, LANs may change their topology due to switches and hosts being turned on/off, link remapping, and component failures. In these cases, a distributed reconfiguration algorithm is executed. This algorithm analyzes the topology, computes the new routing tables, and downloads them to the corresponding switches. Unfortunately, in most cases user traffic is stopped during the reconfiguration process to avoid deadlock. Although network reconfigurations are not frequent, they may take hundreds of milliseconds to execute, thus degrading system availability significantly. In this paper, we propose a new deadlock-free distributed reconfiguration algorithm that is able to asynchronously update the routing tables without stopping user traffic. This dynamic reconfiguration algorithm is valid for any topology, including regular as well as irregular topologies. © Springer-Verlag Berlin Heidelberg 1999.

关键词： Topology

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Shared Information Spaces for Small Devices: The SWARMS Software Concept 34

Shared Information Spaces for Small Devices: The SWARMS Soft...

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34. Jahrestagung der Gesellschaft fur Informatik, Informatik verbindet, INFORMATIK 2004 - 34th Annual Conference of the German Informatics Society, Informatics Connects, INFORMATIK 2004

作者： Koberstein, Jochen Luttenberger, Norbert Buschmann, Carsten Fischer, Stefan Dept. for Computer Science and Applied Mathematics Christan-Albrechts-University in Kiel Christian-Albrechts-Platz 4 KielD-24098 Germany Institute of Operating Systems and Computer Networks Technical University at Braunschweig Mühlenpfordtstr. 23 BraunschweigD-38106 Germany

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Modified ARQ-based cooperative relaying scheme for a delay tolerant network

Modified ARQ-based cooperative relaying scheme for a delay t...

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2021 IEEE International Conference on Electrical, computer, Communications and Mechatronics Engineering, ICECCME 2021

作者： Otaru, Musa Adinoyi, Abdulkareem Ajiya, Mohammed Aljlayl, Mohammed Yanikomeroglu, Halim Bayero University Kano Department of Electrical Engineering Nigeria Technology Strategy Architecture Saudi Telecommunications Company Saudi Arabia Carleton University Dept. of Systems and Computer Engineering Ottawa Canada

ISBN: (纸本)9781665412629

We use fixed relays deployed by network operators to reduce re-transmission (thereby reducing network power requirements) in addition to providing excellent end-to-end error performance in a revisit to automatic repeat request-based cooperative relaying. The new relaying scheme facilitates the creation of a connectivity suitable for delay tolerant internet-of-things (IoT)-type services. For IoT devices, link reliability and power efficiency are a major system design consideration. The proposed scheme operates in the following fashion. The source (e.g., a sensor) transmits for a certain time window. During this period, the source and the relays do not require per transmission acknowledgment (ACK) from the destination. At the end of a transmission window, the destination sends a 'group' ACK. If negative, relays are invited to help. Depending on the cooperation strategy, each relay transmits in either one transmission time slot or a few time slots, using a suitably chosen higher-order modulation constellation. If no error occurs, the source continues its transmission. Furthermore, we devise a novel strategy for selecting the best relay for this new way of exploiting the benefits of multiple relays in a network. In the process, we reclaim the bandwidth expansion that comes with multi-relay system but still maintaining E2E bit error rate that is superior to that of a single relay cooperation. Numerical results that reveal the benefits of the new and modified ARQ cooperative relaying scheme are presented. © 2021 IEEE.

关键词： Energy efficiency

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Real-time Vital Signs Monitoring Based on COTS WiFi Devices

Real-time Vital Signs Monitoring Based on COTS WiFi Devices

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2021 IEEE International Conference on Bioinformatics and Biomedicine, BIBM 2021

作者： Gu, Yu Zhang, Xiang Yan, Huan Liu, Zhi Ji, Yusheng Hefei University of Technology School of Computer and Information Hefei China The University of Electro-Communications Dept. of Computer and Network Engineering Tokyo Japan National Institute of Informatics Information Systems Architecture Science Research Division Tokyo Japan

ISBN: (纸本)9781665401265

Real-time vital signs (breathing and heartbeat) monitoring is essential for patient care and sleep disease prevention. Current solutions are mostly based on wearable sensors or cameras, the former affects the quality of sleep, while the latter is not conducive to privacy protection, and the cost of these methods is usually expensive. In this paper, we propose Wital, a real-time vital signs monitoring system based on the low-cost and widespread COTS WiFi device. Most of the existing WiFi-based vital signs monitoring solutions utilize the line of sight (LOS) WiFi signals to achieve powerful performance. However, in our daily environments, NLOS sensing is more common. In this article, we first model the relationship between the energy ratio of LOS/NLOS signals and the ability to monitor vital signs based on the Ricean-K theory and theoretically prove that blocking LOS signals in NLOS sensing is more beneficial. We have also established a real-time vital signs monitoring system to verify our method, and the experimental results prove the effectiveness of our method. © 2021 IEEE.

关键词： Wi-Fi

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Tuning buffer size in the multimedia router (MMR) 15

Tuning buffer size in the multimedia router (MMR)

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15th International Parallel and Distributed Processing Symposium, IPDPS 2001

作者： Caminero, B. Carrión, C. Quiles, F.J. Duato, F.J. Yalamanchili, S. Dept. of Computer Science Escuela Politecnica Superior Univ. de Castilla-La Mancha Albacete02071 Spain Dept. of Information Systems and Computer Architecture Univ. Politecnica de Valencia Valencia46071 Spain School of Electrical and Computer Engineering Georgia Institute of Technology AtlantaGA30332-0250 United States

ISBN: (纸本)0769509908

The primary objective of the Multimedia Router (MMR) project is the design and implementation of a compact router optimized or multimedia applications. The router is targeted for use in cluster and LAN interconnection networks, which offer different constraints and therefore differing router solutions than WANs. One of the key design parameters is the amount of buffer space, which is closely related to the silicon area required to implement the router. In this paper, the MMR performance obtained when varying the size of the input buffers is explored. Preliminary results show that buffers as small as one flit large suffice to guarantee QoS to both CBR and VBR traffic, thanks to the use of flow control and short links. © 2001 IEEE.

关键词： Interconnection networks (circuit switching)

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Meaning of the Clusters on Dimensionality Reduction by Word Clustering 12

Meaning of the Clusters on Dimensionality Reduction by Word ...

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12th International Congress on Advanced Applied Informatics, IIAI-AAI 2022

作者： Deguchi, Toshinori Seo, Sinsuke Ishii, Naohiro Dept. of Electrical and Computer Engineering Gifu College Gifu Japan Interdisciplinary Technology Development Gifu College Gifu Japan Information Systems Architecture Advanced Institute of Industrial Technology Tokyo Japan

ISBN: (数字)9781665497558

ISBN: (纸本)9781665497558

In text mining, Latent Semantic Analysis (LSA) is the popular method to reduce the dimension of document vectors. Since LSA produces a set of topics by statistical information, the meaning of each topic is not *** proposed a method to reduce the dimension by clustering the words in the documents. This method produces a set of clusters of words instead of topics. Using Word2vec to vectorize the words, the mean vector of the cluster is calculated, which shows the meaning of the *** this paper, we show the dimensionality reduction and the meaning of the generated clusters by word cloud, on document classification problem with a subset of BBC Dataset. © 2022 IEEE.

关键词： Classification (of information)

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Introducing SLAMBench, a performance and accuracy benchmarking methodology for SLAM

Introducing SLAMBench, a performance and accuracy benchmarki...

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2015 IEEE International Conference on Robotics and Automation, ICRA 2015

作者： Nardi, Luigi Bodin, Bruno Zia, M. Zeeshan Mawer, John Nisbet, Andy Kelly, Paul H. J. Davison, Andrew J. Luján, Mikel O'Boyle, Michael F. P. Riley, Graham Topham, Nigel Furber, Steve Dept. Computing Imperial College London United Kingdom Institute for Computing Systems Architecture Univ. of Edinburgh United Kingdom School of Computer Science Univ. of Manchester United Kingdom

ISBN: (纸本)9781479969234

Real-time dense computer vision and SLAM offer great potential for a new level of scene modelling, tracking and real environmental interaction for many types of robot, but their high computational requirements mean that use on mass market embedded platforms is challenging. Meanwhile, trends in low-cost, low-power processing are towards massive parallelism and heterogeneity, making it difficult for robotics and vision researchers to implement their algorithms in a performance-portable way. In this paper we introduce SLAMBench, a publicly-available software framework which represents a starting point for quantitative, comparable and validatable experimental research to investigate trade-offs in performance, accuracy and energy consumption of a dense RGB-D SLAM system. SLAMBench provides a KinectFusion implementation in C++, OpenMP, OpenCL and CUDA, and harnesses the ICL-NUIM dataset of synthetic RGB-D sequences with trajectory and scene ground truth for reliable accuracy comparison of different implementation and algorithms. We present an analysis and breakdown of the constituent algorithmic elements of KinectFusion, and experimentally investigate their execution time on a variety of multicore and GPU-accelerated platforms. For a popular embedded platform, we also present an analysis of energy efficiency for different configuration alternatives. © 2015 IEEE.

关键词： Benchmarking

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NPB-MPJ: NAS Parallel Benchmarks Implementation for Message-Passing in Java

NPB-MPJ: NAS Parallel Benchmarks Implementation for Message-...

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Euromicro Conference on Parallel, Distributed and Network-Based Processing

作者： Damián A. Mallón Guillermo L. Taboada Juan Touriño Ramón Doallo Computer Architecture Group Dept. of Electronics and Systems University of A Coruña A Coruña Spain

Java is a valuable and emerging alternative for the development of parallel applications, thanks to the availability of several Java message-passing libraries and its full multithreading support. The combination of both shared and distributed memory programming is an interesting option for parallel programming multi-core systems. However, the concerns about Java performance are hindering its adoption in this field, although it is difficult to evaluate accurately its performance due to the lack of standard benchmarks in Java. This paper presents NPB-MPJ, the first extensive implementation of the NAS Parallel Benchmarks (NPB), the standard parallel benchmark suite, for Message-Passing in Java (MPJ) libraries. Together with the design and implementation details of NPB-MPJ, this paper gathers several optimization techniques that can serve as a guide for the development of more efficient Java applications for High Performance Computing (HPC). NPB-MPJ has been used in the performance evaluation of Java against C/Fortran parallel libraries on two representative multi-core clusters. Thus, NPB-MPJ provides an up-to-date snapshot of MPJ performance, whose comparative analysis of current Java and native parallel solutions confirms that MPJ is an alternative for parallel programming multi-core systems.

关键词： Java Libraries Parallel programming Multithreading Design optimization Industrial training Scalability computer architecture Application software Availability

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Fast Energy Estimation Through Partial Execution of HPC Applications 29

Fast Energy Estimation Through Partial Execution of HPC Appl...

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29th IEEE International Conference on Application-Specific systems, architectures and Processors, ASAP 2018

作者： Salinas-Hilburg, Juan Carlos Zapater, Marina Moya, Jose M. Ayala, Jose L. Dept. of Computer Architecture and Automation Complutense University of Madrid Madrid Spain Lausanne Switzerland Integrated Systems Laboratory Technical University of Madrid Madrid Spain CCS-Center for Computational Simulation Madrid Spain

ISBN: (纸本)9781538674796

In order to optimize the energy use of servers in Data Centers, techniques such as power capping or power budgeting are usually deployed. These techniques rely on the prediction of the power and execution time of applications. These data are obtained via dynamic profiling which requires a full execution of the application. This is not feasible in High Performance Computing (HPC) applications with long execution times. In this paper, we present a methodology to estimate the dynamic CPU and memory energy consumption of an application without executing it completely. Our methodology merges static code analysis information and dynamic profiling via the partial execution of the application. We do so by leveraging the concept of application signature, defined as a reduced version of the application in terms of execution time and power profile. We validate our methodology with a set of CPU -intensive, memory-intensive benchmarks and multi-threaded applications in a presently shipping enterprise server. Our energy estimation methodology shows an overall error below 8.0% when compared to the dynamic energy of the whole execution of the application. Also, our energy estimation methodology allows to estimate the energy of multi-threaded applications with an RMSE equal to 12.7% when compared to the dynamic energy from the complete parallel execution. © 2018 IEEE.

关键词： Budget control

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