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    Wyświetlanie 1-8 z 8
    Tytuł:
    Erlang-based sensor network management for heterogeneous devices
    Autorzy:
    Nieć, M.
    Pikuła, P.
    Mamla, A.
    Turek, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/305475.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    Erlang
    mobile devices
    sensor networks
    Opis:
    The paper describes a system designed to manage and collect data from the network of heterogeneous sensors. It was implemented using Erlang OTP and CouchDB for maximum fault tolerance, scalability and ease of deployment. It is resistant to poor network quality, shows high tolerance for software errors and power failures, operates on flexible data model. Additionally, it is available to users through an Web application, which shows just how easy it is to use the server HTTP API to communicate with it. The whole platform was implemented and tested on variety of devices like PC, Mac, ARM-based embedded devices and Android tablets.
    Źródło:
    Computer Science; 2012, 13 (3); 139-151
    1508-2806
    2300-7036
    Pojawia się w:
    Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Erlang-based software update platform for mobile devices
    Autorzy:
    Wielgus, M.
    Dąbek, P.
    Janusz, R.
    Kowal, T.
    Turek, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/305351.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    Erlang
    software updates
    distributed system
    Opis:
    Growing computational power of mobile devices modifies existing approaches to data processing in large-scale sensor networks. Since sensors are no longer limited to simple data acquisition tasks, such networks can be considered complex geodistributed data processing systems. Features and requirements of such systems justify use of Erlang language and technology for programming mobile devices.The technology provides several crucial features, including fault tolerance, message-passing concurrency or hot-code loading. In this paper the problem of software management in Erlang-based distributed systems is discussed. A mechanism for installing and upgrading Erlang applications using operating system package manager is described. A platform for updating software in largescale systems is presented.
    Źródło:
    Computer Science; 2013, 14 (1); 129-141
    1508-2806
    2300-7036
    Pojawia się w:
    Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Properties of the Multiservice Erlangs Ideal Gradings
    Autorzy:
    Hanczewski, S.
    Kmiecik, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/308103.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    Erlang's Ideal Grading
    multi-service system
    traffic engineering
    Opis:
    The design and optimization process of modern telecommunications networks is supported by a range of appropriate analytical models. A number of these models are based on the Erlang’s Ideal Grading (EIG) model, which is a particular case of non-full-availability groups. A possibility of the application of the EIG model results from the fact that telecommunications systems show properties and features distinctive to non-full-availability systems. No detailed studies that would decisively help determine appropriate conditions for the application of the EIG model for modeling of other non-full-availability groups, that would be models corresponding to real telecommunications systems, have been performed. Therefore, this article attempts to find an answer to the following question: what are the prerequisite conditions for the application of the EIG model and when the model can be reliably used?
    Źródło:
    Journal of Telecommunications and Information Technology; 2016, 1; 37-43
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Implementing graph representation model for parallel and distributed systems using Erlang
    Autorzy:
    Petrov, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/305754.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    graphs representation
    parallel systems
    distributed systems
    clusters
    Erlang
    Opis:
    This paper describes a new model of graph representation using the Erlang actor model. Benefits of using lightweight processes instead of traditional passive data structures are given. Examples of using this model are shown. The experimental part gives two examples of using early implementations of the offered model. As a conclusion, an analysis of applicability for tasks from different branches of science is given.
    Źródło:
    Computer Science; 2016, 17 (1); 99-120
    1508-2806
    2300-7036
    Pojawia się w:
    Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Queuing models for cellular networks with generalised Erlang service distributions
    Autorzy:
    Jayasuriya, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/307731.pdf
    Data publikacji:
    2003
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    sieci komórkowe
    cellular networks
    phase type distributions
    generalised Erlang
    Opis:
    Providing seamless handover is one of the major problems in mobile communication environments. Careful dimensioning of the network and the underlying teletraffic analysis plays a major role in determining the various grade of services (GoSs) that can be provided at various network loads for handover users. It has been shown that the channel holding time of a cell, one of the important parameters in any teletraffic analysis, can be accurately modelled by Erlang distributions. This paper focuses on solving queuing systems with generalised Erlang service distributions and exponential arrival distributions. We present the quasi-birth-death (QBD) process, which characterises the queuing models with generalised Erlang service and exponential interarrival distributions. We then use the properties of Erlang distributions and characteristics of channel allocation process of cellular networks to simplify the queues used to model cellular networks. The use of these simplifications provide a significant reduction in computation time required to solve these QBDs.
    Źródło:
    Journal of Telecommunications and Information Technology; 2003, 2; 55-61
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Static analysis of function calls in Erlang. Refining the static function call graph with dynamic call information by using data-flow analysis
    Autorzy:
    Horpácsi, D.
    Koszegi, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/384069.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    static function call graph
    dynamic call information
    flow analysis
    language Erlang
    Opis:
    Functions and their relations can affect numerous properties and metrics of a functional program. To identify and represent the functions and their calling connections, software analysers commonly apply semantic function analysis, which derives the static call graph of the program, based on its source code. Function calls however may be dynamic and complex, making it difficult to statically identify the callee. Dynamic calls are determined just at run-time, static analysis therefore cannot be expected to fully identify every call. Nevertheless, by utilising the results of a properly performed data-flow analysis as well as taking ambiguous references into account, numerous dynamic calls are discoverable and representable. We consider cases where the identifiers of the callee are statically determined, but they flow into the call expression from a different program point, and also, we manage to handle function calls whose identifiers are not fully identifiable at compile-time. By utilizing the improved reference analysis, we extend the static call graph with various information about dynamic function calls. We investigate such a function call analysis in the programming language Erlang.
    Źródło:
    e-Informatica Software Engineering Journal; 2013, 7, 1; 65-76
    1897-7979
    Pojawia się w:
    e-Informatica Software Engineering Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Asymptotic approximations to the non-isothermal distributed activation energy model for bio-mass pyrolysis
    Autorzy:
    Dhaundiyal, A.
    Singh, S. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/386522.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    biomass pyrolysis
    distributed activation energy model (DAEM)
    DAEM
    non-isothermal kinetics
    gamma distribution
    asymptotic expansion
    erlang distribution
    Opis:
    This paper describes the influence of some parameters significant to biomass pyrolysis on the numerical solutions of the non-isothermal nth order distributed activation energy model (DAEM) using the Gamma distribution and discusses the special case for the positive integer value of the scale parameter (), i.e. the Erlang distribution. Investigated parameters are the integral upper limit, the frequency factor, the heating rate, the reaction order, and the shape and rate parameters of the Gamma distribution. Influence of these parameters has been considered for the determination of the kinetic parameters of the non-isothermal nth order Gamma distribution from the experimentally derived thermoanalytical data of biomass pyrolysis. Mathematically, the effect of parameters on numerical solution is also used for predicting the behaviour of the unpyrolysized fraction of biomass with respect to temperature. Analysis of the mathematical model is based upon asymptotic expansions, which leads to the systematic methods for efficient way to determine the accurate approximations. The proposed method, therefore, provides a rapid and highly effective way for estimating the kinetic parameters and the distribution of activation energies.
    Źródło:
    Acta Mechanica et Automatica; 2017, 11, 4; 293-301
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Symulacje komputerowe strumienia zgłoszeń w systemach masowej obsługi
    Computer simulations of request stream in mass service systems
    Autorzy:
    Purczyński, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/253090.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Naukowo-Wydawniczy TTS
    Tematy:
    system masowej obsługi
    poissonowski strumień zgłoszeń
    rozkład Erlanga
    mass service system
    Poisson request stream
    Erlang distribution
    Opis:
    W pracy rozpatrzono zagadnienie jakości generatorów wykorzystywanych do symulacji komputerowej strumienia zgłoszeń w systemach masowej obsługi. Uwzględniono dwa podstawowe rozkłady: poissonowski strumień zgłoszeń oraz rozkład Erlanga rzędu k. Zaproponowano algorytm, który prowadzi do wyników nieznacznie lepszych, niż uzyskanych dla generatora programu MathCad.
    In the paper the problem of the quality of generators used in computer simulations of request stream in mass service systems was examined. Two basic distributions were taken into account: Poisson request stream and the Erlang distribution of order k. An algorithm was proposed which leads to results slightly better than the results obtained for MathCad program generator.
    Źródło:
    TTS Technika Transportu Szynowego; 2015, 12; 1250-1253, CD
    1232-3829
    2543-5728
    Pojawia się w:
    TTS Technika Transportu Szynowego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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