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Dataflow Optimization Using of WiFi, GSM, UMTS, BT and GPS Positioning in Mobile Information Systems on Mobile Devices

Dataflow Optimization Using of WiFi, GSM, UMTS, BT and GPS P...

引用

International Conference on computer engineering and Applications (ICCEA)

作者： Ondrej Krejcar Dalibor Janckulik Leona Motalova Center of Applied Cybernetics Department of Measurement and Control Faculty of Electrical Engineering and Computer Science VSB-Technical University of Ostrava Ostrava Czech Republic

ISBN: (纸本)9781424460793;9780769539829

Use of various wireless communications network standards or GPS for positioning is well known from countless previously published research articles. Joining of positioning principles with data artefacts prebuffering can provide a many advantages in using of mobile devices as a clients of remote server on-line systems. On of the key aspects can be seen in rapid increasing of data throughput of download connection (downlink). The user requested data artefact can be preloaded to mobile database cache (SQL Server CE), from where it is accessible through a user software application. Accessing time of artefacts from mobile cache (physically located on SD Card) is fraction in compare to a classical on-line accessing the data artefact from server through a web services.

关键词： GSM 3G mobile communication Global Positioning System Information systems Wireless communication Communication standards Standards publication Network servers Throughput Downlink

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Optimal Data Artifact Determination for Mobile SQL Server CE Database Buffering as a Way to Solve the Problem of Low Performance of Portable Mobile Devices

Optimal Data Artifact Determination for Mobile SQL Server CE...

引用

International Conference on computer engineering and Applications (ICCEA)

ISBN: (纸本)9781424460793

The paper describes a problem of prebuffering on wireless connected mobile devices through a mobile database (Mobile SQL Server CE) as a solution for low throughput on wireless connection of mobile devices. As a second important area the optimal data artifact determination is described with a compare of two selected artifact size. The prebuffering control is based on wireless localization and positioning inside the buildings. Also the proposed technique is possible to adapt using others wireless communication networks or GPS positioning.

关键词： Databases Portable computers Testing Mobile computing Network servers Information systems Web server Smart phones Management information systems computer applications

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Development of bar code scanner application for Windows Mobile devices using a Symbol Mobility Developer Kit for .NET Compact Framework

Development of bar code scanner application for Windows Mobi...

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International Conference on Mechanical and Electronics engineering (ICMEE)

作者： Ondrej Krejcar Marcel Macecek Department of Measurement and Control Center for Applied Cybernetics Faculty of Electrical Engineering and Computer Science VSB-Technical University of Ostrava Ostrava Czech Republic

The problem we would like to discuss and solve is based on a remote controlling of created packages containing predefined components with a predefined numbers of these components. In principle the problem acts as a check out control problem. By the help of mobile device with integrated bar code scanner an application for such mobile device can be developed as a remote client of server, which contains a database with predefined properties, numbers of packages, etc. A web services and mobile client application was created using a Microsoft Visual Studio 2008.

关键词： Mobile communication Europe

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Stress Testing Data Access via a Web Service for Determination of Adequate Server Hardware for Developed Software Solution

Stress Testing Data Access via a Web Service for Determinati...

引用

International Conference on computer engineering and Applications (ICCEA)

作者： Leona Motalova Ondrej Krejcar Center of Applied Cybernetics Department of Measurement and Control Faculty of Electrical Engineering and Computer Science VSB-Technical University of Ostrava Ostrava Czech Republic

ISBN: (纸本)9781424460793

The aim of this project is stress testing of the system for data management and planning of the operations developed for home care agencies which has to be upgrading of the current system based on the older database of Microsoft Access product. The part of the system is a mobile application that allows employees to edit the records of patients directly in the terrain. The whole system, including applications developed for the stress testing is based on Microsoft technology .NET. Our Stress Testing application allows testing a selected problem areas to find any limitations before the tested developing solution will be set up at customer. By the help of our test application, the hardware solution for the server was selected on the base of selected home care agency needs.

关键词： Stress Software testing Web services Hardware Databases System testing Displays Random number generation Time factors Time measurement

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User adaptation improvement using a software components for mobile control systems in .NET Compact Framework

User adaptation improvement using a software components for ...

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International Conference on Networking and Information Technology (ICNIT)

作者： Ondrej Krejcar Jiri Cajka Department of Measurement and Control Center of Applied Cybernetics Faculty of Electrical Engineering and Computer Science VSB-Technical University of Ostrava Ostrava Czech Republic

ISBN: (纸本)9781424475797;9781424475773;9781424475780

A huge number of components for development tool of Microsoft Visual Studio is possible to find on internet. They are however only extensive, or graphically modified standard components that belongs to standard Visual Studio. Components development for industrial using is made by specialized firms. Such components are considerably price expensive. Aim of this project is to form at least small parts of components for HMI (Human Machine interface) on a basis of PDA with Windows Mobile with a usage of Microsoft Visual Studio 2008, eventually of other needed Open Source libraries.

关键词： control systems Libraries Graphics Displays Information technology Electric variables measurement computer science Internet Humans Mobile computing

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Modeling Nonlinear Acoustic Wave Fields in Media with Inhomogeneity in the Attenuation and in the Nonlinearity

Modeling Nonlinear Acoustic Wave Fields in Media with Inhomo...

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2010 IEEE International Ultrasonics Symposium

作者： L. Demi M.D. Verweij N. de Jong K.W.A. van Dongen Laboratory of Acoustical Imaging and Sound Control Faculty of Applied Sciences Delft University of Technology The Netherlands Laboratory of Electromagnetic Research Faculty of Electrical Engineering Mathematics and Computer Science Delft University of Technology The Netherlands Laboratory of Experimental Echocardiography Erasmus Medical Center Rotterdam The Netherlands

ISBN: (纸本)9781457703829

Biomedical tissues usually show inhomogeneity in their acoustic medium parameters. These inhomogeneities cause refraction and scattering of diagnostic and therapeutic ultrasound waves. A method that is able to model the effects of inhomogeneity in the attenuation and in the nonlinearity is essential for the design of transducers for new ultrasound modalities and the development of novel ultrasound applications. The Iterative Nonlinear Contrast Source (INCS) method has originally been designed for the accurate modeling of nonlinear acoustic wave fields in homogeneous media. It considers the nonlinear term from the Westervelt equation as a distributed contrast source, and the corresponding integral equation is solved using an iterative Neumann scheme. This paper presents an extension of the INCS method that can handle inhomogeneity in the attenuation and in the coefficient of nonlinearity. Results are presented for the one-dimensional case. These show that in this case the presented method correctly predicts the effects related to nonlinear propagation and scattering by inhomogeneities in the attenuation and the coefficient of nonlinearity.

关键词： Inhomogeneities nonlinearity Attenuation wave fields Attenuation Acoustic Wave Ultrasonic applications Scattering Ultrasonic Therapy

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Modeling Nonlinear Medical Ultrasound via a Linearized Contrast Source Method

Modeling Nonlinear Medical Ultrasound via a Linearized Contr...

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2010 IEEE International Ultrasonics Symposium

ISBN: (纸本)9781457703829

Research on nonlinear medical ultrasound has been increased over the last decade and has resulted in a wide range of numerical methods for the modeling of the nonlinear distortion of a propagating pressure wave. However, when applied to realistic configurations, the majority of these methods are either computationally expensive or limited by the applied approximations. The Iterative Nonlinear Contrast Source (INCS) method is able to accurately compute the pulsed nonlinear pressure wave field that is generated in a large three-dimensional domain by an arbitrary transducer transmitting under a large steering angle. The method is based on the Neumann iterative solution of a nonlinear integral equation that is equivalent to the Westervelt equation. To improve the performance of the method, it would be beneficial to employ iterative schemes (e.g. Conjugate Gradient based schemes) that are efficient for solving linear integral equations. This motivates the development of a linearized version of the INCS method, as presented in this paper. To test the presented approach, a Bi-CGSTAB scheme is used to solve the linearized Westervelt equation. For the one-dimensional case, results are obtained and compared with the solution obtained with the original INCS method, and the Fubini solution. All the results have been obtained up to the third harmonic component and are in agreement with each other.

关键词： Pressure waves nonlinearity Nonlinear distortion Integral equations Modeling Numerical methods Ultrasonic Waves Equation Medical

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Use of accelerometers for material inner defect detection

Use of accelerometers for material inner defect detection

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International Conference on applied Electronics, AE

作者： Ondrej Krejcar Robert Frischer Department of Measurement and Control Center of Applied Cybernetics Faculty of Electrical Engineering and Computer Science VSB-Technical University of Ostrava Ostrava Czech Republic Department of Automation and Computing in Metallurgy VSB-Technical University of Ostrava Ostrava Czech Republic

This paper deals with a possibility of non-destructive diagnostics of solid objects by software analysis of vibration spectrum by accelerometers. By a use of MATLAB platform, a processing and information evaluation from accelerometer is possible. Accelerometer is placed on the measured object. The analog signal needs to be digitized by a special I/O device to be processed offline with FFT (Fast Fourier Transformation). The power spectrum is then examined by developed evaluating procedures.

关键词： Accelerometers Vibrations Software Conferences Distortion measurement Converters Unified modeling language

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Notice of Retraction: Material inner defect detection by a vibration spectrum analysis

Notice of Retraction: Material inner defect detection by a v...

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International Conference on Mechanical and Electronics engineering (ICMEE)

作者： Ondrej Krejcar Robert Frischer Department of Measurement and Control Center for Applied Cybernetics Faculty of Electrical Engineering and Computer Science VSB-Technical University of Ostrava Ostrava Czech Republic Department of Automation and Computing in Metallurgy VSB-Technical University of Ostrava Ostrava Czech Republic

This article has been retracted by the publisher.

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Research on Data Exchange Platform for Power Enterprise Based on ESB

Research on Data Exchange Platform for Power Enterprise Base...

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International Conference on Computational Intelligence and Software engineering (CiSE)

作者： Yaling Wang Pishi Sun Wenbin Zhang Zhanfeng Cao Applied Science Private University Beijing China Electromobility Sub-systems Volvo GTT Advanced Technology & Research Göteborg Sweden Electric Power Research Institute Puhua Information Technology Company Limited Beijing China School of Control and Computer Engineering North China Electric Power University Beijing China Faculty of Mechanical Engineering University of Ljubljana Ljubljana Slovenia

Since data sharing mechanism between the various business systems lacks of specification and standardization, information shares hardly and data exchange are inefficient, the paper proposes a data exchange platform for power enterprise based on ESB, which is based on SOA architecture, unified data exchange standards by using XML, used SOAP/HTTP(S) as the data transfer protocol between business systems and services bus and used Web Services as the business system data exchange standard interface. BEA ALSB service bus provides data exchange services for registration, release, information, routing and other functions. Practice has proved that the platform has good flexibility and scalability and can meet the business enterprise system between all kinds of complex data exchange requirements.

关键词： Business Service oriented architecture Marketing and sales Security Routing Databases

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