Department of Computer Architecture - Administrative Units - Bridge of Knowledge

Search

Department of Computer Architecture

Filters

total: 855

  • Category
  • Year
  • Options

clear Chosen catalog filters disabled

Catalog Publications

Year 2012
  • Collaborative approach to WordNet and Wikipedia integration
    Publication

    In this article we present a collaborative approach tocreating mappings between WordNet and Wikipedia. Wikipediaarticles have been first matched with WordNet synsets in anautomatic way. Then such associations have been evaluated andcomplemented in a collaborative way using a web application.We describe algorithms used for creating automatic mappingsas well as a system for their collaborative development. Theoutcome enables further...

  • Commonly Accessible Web Service Platform - Wiki-WS
    Publication

    - Year 2012

    Web Service technology on the basis had to supply complete and reliable system components. Nowadays this technology is commonly used by companies providing results of their work to end users and hiding implementation details. This paper presents a SOA-enabled platform - Wiki-WS - that empowers users to deploy, modify, discover and invoke web services. Moreover it discusses concepts and functionalities of this open source management...

    Full text to download in external service

  • Context Search Algorithm for Lexical Knowledge Acquisition
    Publication

    - CONTROL AND CYBERNETICS - Year 2012

    A Context Search algorithm used for lexical knowledge acquisition is presented. Knowledge representation based on psycholinguistic theories of cognitive processes allows for implementation of a computational model of semantic memory in the form of semantic network. A knowledge acquisition using supervised dialog templates have been performed in a word game designed to guess the concept a human user is thinking about. The game,...

  • Contour Analysis of Bleeding Regions in Endoscopic Images
    Publication

    This paper investigates the problem of detecting bleeding regions in images acquired from endoscopic examinations of gastrointestinal tract. The purpose is to identify the characteristic features of bleeding areas' contours in order to develop an accurate method for discriminating between true bleeding regions and missed detections, which could lead to a significant reduction of the false alarm rate of existing blood-detection...

  • Credibility of Business Operations via Internet: Customer Perspective
    Publication

    - Year 2012

    Tourism plays an important role in economy of Mediterranean countries. Year after year, more and more people spend or like to spend their vacations (and money) in the Mediterranean region. Hiring private apartments or houses by individual persons for themselves and their families becomes more and more popular way of vacation arrangement and, in the result, constitutes an important factor of the countries' incomes. Versatile and...

  • Critical section maintenance in a distributed agent system
    Publication

    - Year 2012

  • Data Partitioning and Task Management in the Clustered Server Layer of the Volunteer-based Computation System
    Publication

    - Year 2012

    While the typical volunteer-based distributed computing system focus on the computing performance, the Comcute system was designed especially to keep alive in the emergency situations. This means that designers had to take into account not only performance, but the safety of calculations as well. Quadruple-layered architecture was proposed to separate the untrusted components from the core of the system. The main layer (W) consists...

  • Dependable Integration of Medical Image Recognition Components

    Computer driven medical image recognition may support medical doctors in the diagnosis process, but requires high dependability considering potential consequences of incorrect results. The paper presentsa system that improves dependability of medical image recognition by integration of results from redundant components. The components implement alternative recognition algorithms of diseases in thefield of gastrointestinal endoscopy....

  • Distributed Detection of Selected Features in Data Streams Using Grid-class Systems
    Publication

    - Year 2012

    This chapter describes basic methodology of distributed digital signal processing. A choice of distributed methods of detection of selected features in data streams using grid-class systems is discussed. Problems related to distribution of data for processing are addressed. A mitigating method for data distribution and result merging is described.

  • Distributed infrastructure of self-organizing service servers
    Publication

    - Year 2012

    This paper presents an idea of creating distributed system consisting of autonomous self-organizing service providers. It shows a real implemented system allowing for dynamic service search without interaction with client based on the inter-servers communication. Moreover presented system can be easily enriched with new elements without the need for restarting already existing servers.

  • Dynamic OWL Ontology matching Using Lexical Wordnet-based Measures

    Ontologies are often used as a means of describing knowledge and the domain of operation of modern applications. S need arises for the ability to quickly match those ontologies to enable interoperability of such systems. This paper presents an extension to Noy and McGuiness ontology construction methodology which should improve ontology interoperability and a lexicon-based algorithm for merging and aligning of such ontologies stored...

    Full text available to download

  • Dynamic ranking of cloud providers
    Publication

    - Year 2012

    The paper focuses on how to create an effective dynamic ranking service for IaaS,PaaS and SaaS cloud providers. It considers building of a quality model for thispurpose along with definition of quality measurement procedures. The paper discussesseveral techniques known from already existing price comparison engines that couldbe modified and adopted for comparison of cloud providers. Furthermore, a tech-nique for filtering measured...

    Full text to download in external service

  • Efektywna integracja dostępności usług w rozproszonych środowiskach biznesowych
    Publication

    - Year 2012

    Omówiono szerokie spektrum usług biznesowych dostępnych w ogólnie pojętej globalnej sieci Internet. Na przykładach serwisu Allegro (usługi komercyjne), platformy sprzętowo-programowej firmy Nokia oraz witryny banku Pekao (płatności) pokazano model dostępności do usług operacyjnych zarówno z urządzeń mobilnych jak i związanych z infrastrukturą stacjonarną. Zaprezentowano możliwości wzajemnej integracji usług zorientowanych zarówno...

  • Efektywne metody oceny integracji heterogenicznych serwisów z uwzględnieniem wymagań interoperacyjności
    Publication

    - Year 2012

    W rozdziale przedstawiono istniejące metody opisu interoperacyjności heterogenicznych serwisów w kontekście technologii usług sieciowychi systemów w architekturze zorientowanej na usługi. Opisano miary interoperacyjności i technologie związane z zapewnieniem interoperacyjności usług sieciowych. Ponadto opisano istniejące metody doboru optymalnych serwisów w kompozycji serwisów złożonych dla podejść kombinatorycznych i grafowych....

  • Efektywne zrównoleglanie obliczeń w systemie klasy grid na przykładzie hipotezy Collatza
    Publication

    Zaprezentowano problem Collatza oraz sposób jego adaptacji, pozwalający na realizację obliczeń w systemie typu grid. Zidentyfikowano również pożądane cechy problemów obliczeniowych, dzięki którym mogą one zostać zrównoleglone w sposób efektywny w systemach typu grid i porównano je z cechami zadań realizowanych typowo przy użyciu klastrów obliczeniowych.

    Full text to download in external service

  • Emotion Recognition Based on Facial Expressions of Gamers
    Publication

    This article presents an approach to emotion recognition based on facial expressions of gamers. With application of certain methods crucial features of an analysed face like eyebrows' shape, eyes and mouth width, height were extracted. Afterwards a group of artificial intelligence methods was applied to classify a given feature set as one of the following emotions: happiness, sadness, anger and fear.The approach presented in this...

  • Empiryczna Weryfikacja Hipotezy Collatza za pomocą obliczeń Gridowych
    Publication

    - Year 2012

  • Endoscopic Video Classification with the Consideration of Temporal Patterns

    The article describes a novel approach to automatic recognition and classification of diseases in endoscopic videos. Current directions of research in this field are discussed. Most presented methods focus on processing single frames and do not take into consideration the temporal relationship between continuous classifications. Existing approaches that consider the temporal structure of an incoming frame sequence are focused on...

  • Evaluation of multimedia applications in a cluster oriented environment

    In the age of Information and Communication Technology (ICT), Web and the Internet have changed significantly the way applications are developed, deployed and used. One of recent trends is modern design of web-applications based on SOA. This process is based on the composition of existing web services into a single scenario from the point of view of a particular user or client. This allows IT companies to shorten product time-to-market....

    Full text available to download

  • Evaluation of Workflow Runtime Platforms in Service Composition
    Publication

    - Year 2012

    Typically, workflow applications are constructed from basic functionalities that may be realized by alternative services deployed in heterogeneous runtime platforms. Depending on workflow structure and selection of services, the applications differ in attributes such as price, Quality of Service (QoS) and others. In the paper, we propose a method of evaluation of workflow runtime platforms using Data Envelopment Analysis. We present...

  • Extendable Safety and Security Ontology

    Security plays an increasingly important role in our everyday life, and research and users of computer systems point out that the need arises for a common, formalised model capable of integrating different solutions. In this paper we show that an ontology can be designed and created in a way that will make it suitable for interoperability and integration. A security and safety ontology and the methodology for creating a common...

    Full text available to download

  • Foundations of Grid Processing Architecture for the Comcute System
    Publication

    - Year 2012

    Fundamental system algorithms and structures implemented in the Comcute system are described and analysed in detail. Layered architecture of the system model is highlighted. System tasks of the layers are elaborated, presented and described. Operational details of communication interfaces among layers are worked out and examined. The focus is put onto implemented system components with regard to their operability and efficiency....

  • Functional Components Enhancing Clients Attractiveness and Commercial Profitability of Internet Tourist-oriented Commercial Websites
    Publication

    - Year 2012

    Tourism constitutes an important branch of economy in Mediterranean countries. Great number of people spend or are planning to spend their free time in the Mediterranean area. Extensive rentals of private apartments or houses for individual persons and their families as well as all kinds of services provided for tourists, in result, generate substantial economical incomes. Variety and diversity of offers of private accommodations...

    Full text to download in external service

  • Genetic Positioning of Fire Stations Utilizing Grid-computing Platform
    Publication

    A chapter presents a model for determining near-optimal locations of fire stations based on topography of a given area and location of forests, rivers, lakes and other elements of the site. The model is based on principals of genetic algorithms and utilizes the power of the grid to distribute and execute in parallel most performance-demanding computations involved in the algorithm.

  • Genetic Programming for Workload Balancing in the Comcute Grid System
    Publication

    - Year 2012

    A genetic programming paradigm is implemented for reliability optimization in the Comcute grid system design. Chromosomes are generated as the program functions and then genetic operators are applied for finding Pareto-suboptimal task assignment and scheduling. Results are compared with outcomes obtained by an adaptive evolutionary algorithm.

  • Image Processing Techniques for Distributed Grid Applications
    Publication

    - Year 2012

    Parallel approaches to 2D and 3D convolution processing of series of images have been presented. A distributed, practically oriented, 2D spatial convolution scheme has been elaborated and extended into the temporal domain. Complexity of the scheme has been determined and analysed with respect to coefficients in convolution kernels. Possibilities of parallelisation of the convolution operations have been analysed and the results...

  • Indirect control over subordinate units
    Publication

    Developing a game universe usually involves creation of various units which can be both, encountered by a player or controlled by him. There is a number of works considering autonomous behaviours of units wandering around the game world. When it comes to the units controlled by the player, they often are lack of autonomy and are strictly controlled by the player. This paper presents a concept of units behaviour depending on their...

  • Integracja urządzenia Kinect w systemie rehabilitacji
    Publication

    - Year 2012

    W rozdziale przeanalizowano problemy integracji systemu re-habilitacji z sensorem Kinect na przykładzie doświadczeń przy tworzeniu systemu rehabilitacji o nazwie Soncoya dla dzieci dotkniętych mózgowym porażeniem dziecięcym. Kinect to obecnie najpopularniejsze urządzenie do wykrywania szkieletu sylwetki oraz ruchu człowieka. W związku z tym idealnie nadaje się on w systemach rehabilitacji przy sprawdzaniu odpowiednich postaw przyjmowanych...

  • Integracyjna architektura systemu monitorowania terenu Politechniki Gdańskiej
    Publication

    - Year 2012

    W rozdziale przedstawiono zastosowanie integracyjnej metodywytwarzania aplikacji w systemie monitorowania bezpieczeństwa przestrzeni publicznej. Została opisana architektura i proces wytwórczy systemu Monitoring PG, który umożliwia automatyczne rozpoznawanie niebezpieczeństw oraz przesyłanie informacji do odpowiednich służb. Podczas realizacji systemu zaproponowano systematyczny opis interfejsów integrowanych usług obejmującyspecyfikacje...

  • Integracyjna metoda wytwarzania wiarygodnych aplikacji rozproszonych
    Publication

    W pracy przedstawiono metodę wytwarzania aplikacji w archi- tekturze zorientowanej na usługi, w której uwzględniono interoperacyjność i wiary- godność integrowanych elementów. Zaproponowano rozszerzenie istniejących algorytmów wyboru usług o analizę interoperacyjności oraz wykorzystanie ekspertowego systemu wyboru technik tolerowania błędów bazującego na klasteryzacji. Metoda została zaimplementowana jako system internetowy.

  • Integrating heterogeneous systems with high-dependability requirements by means of web services
    Publication

    - Year 2012

    Web services are commonly used on boundaries of heterogeneous components in Service Oriented Architecture (SOA) as they provide a universal communication channel not bound to any particular programming language or run-time platform. This paper describes how web services can be used to integrate heterogeneous systems which serve purposes requiring high dependability, reliability and availability. Examples of such systems include...

  • Integration of cloud-based services into distributed workflow systems: challenges and solutions

    The paper introduces the challenges in modern workflow management in distributed environments spanning multiplecluster, grid and cloud systems. Recent developments in cloud computing infrastructures are presented and are referring howclouds can be incorporated into distributed workflow management, aside from local and grid systems considered so far. Severalchallenges concerning workflow definition, optimisation and execution are...

    Full text available to download

  • Inteligentne wspomaganie podejmowania decyzji z wykorzystaniem metod sztucznej inteligencji w środowisku obliczeniowym typu grid
    Publication

    - Year 2012

    Podejmowanie decyzji jest uważane za jedno z najbardziej krytycznych działań w organizacji. W celu wsparcia tego złożonego procesu dla osób odpowiedzialnych różne niezależne, samodzielne systemy wspomagania decyzji zostały opracowane głównie w ostatnich dwóch dekadach. Patrząc w sposób komplementarny na te systemy, wiążemy je z rolą i funkcją, którą musi spełniać z punktu widzenia użytkownika. W rozdziale opisano systemy wspomagania...

    Full text to download in external service

  • Interactive Information Retrieval Algorithm for Wikipedia Articels
    Publication

    - Year 2012

    The article presents an algorithm for retrieving textual information in documents collection. The algorithm employs a category system that organizers the repository and using interaction with user improves search precision. The algorithm was implemented for simple English Wikipedia and the first evaluation results indicates the proposed method can help to retrieve information from large document repositories.

  • Interoperability Constraints in Service Selection Algorithms
    Publication

    - Year 2012

    In Service Oriented Architecture, composite applications are developed by integration of existing, atomic services that may be available in alternative versions realizing the same functionality but having different Quality of Service (QoS) attributes. The development process requires effective service selection algorithms that balance profits and constraints of QoS attributes. Additionally, services operate in a heterogeneous environment,...

  • Interoperability Description of Web Services Based Application Servers
    Publication

    - Year 2012

    Web services standards were designed to enable interoperability of heterogeneous application servers in the Service Oriented Architecture. Although the standards proved to be highly successful, there are still difficulties in effective services integration. The paper presents a methodology that enables description of application servers interoperability in order to improve the service integration process. The methodology proposes...

  • Inżynieria ontologii dla potrzeb integracji systemów
    Publication

    - Year 2012

    Inżynieria ontologii to gałąź inżynierii wiedzy, która zajmuje się metodami i metodologiami budowy ontologii. Zajmuje się m. in. procesem wytwarzania, cyklem życia oraz narzędziami wspomagającymi wytwarzanie ontologii. W publikacji przedstawiono różne metodologie wytwarzania ontologii oraz wspierające te metodologie narzędzia. Omówiono edytor ontologii OCS, opracowany przez Katedrę ASK Wydziału ETI PG, oraz wykorzystaną w nim,...

    Full text available to download

  • Klasyfikacja usług i ich wykorzystanie do wytwarzania aplikacji na platformie Kaskada

    Przedstawiono metodologię komponentowego wytwarzania aplikacji bazujących na strumieniowym przetwarzaniu danych. Scharakteryzowano proces wytwarzania oparty o nowo utworzoną platformę Kaskada, ulokowaną w środowisku superkomputera Galera. Przedstawiono gotową listę usług dostępnych na tej platformie. Podano przykładowy scenariusz orkiestracji usług z różnych kategorii, pozwalającym na skrócenie czasu wytwarzania gotowej aplikacji.

  • Konstrukcja bazy danych dla systemu wspomagania diagnostyki chorób przewodu pokarmowego

    W artykule krótko przedstawiono charakterystykę procesu diagnostyki chorób przewodu pokarmowego oraz istniejące techniki wspomagania go na bazie analizy zdjęć z badań endoskopowych. Szczegółowo opisano proces tworzenia specjalistycznej bazy danych medycznych, której przeznaczeniem jest wspomaganie procesu uczenia klasyfikatorów chorób przewodu pokarmowego. Na koniec przedstawiono zebrane w bazie dane oraz uzyskane efekty.

  • Lexicon Based Algorithm for Domain Ontology Merging and Alignment
    Publication

    More and more systems contain some kind of knowledge describing their field of operation. Such knowledge in many cases is stored as an ontology. A need arises for ability to quickly match those ontologies to enable interoperability of such systems. The paper presents a lexicon based algorithm for merging and aligning of OWL ontologies. The proposed similarity levels are being presented and the proposed algorithm is being described....

    Full text to download in external service

  • Matching Exception Class Hierarchies between .NET, Java Environments
    Publication

    The paper presents a methodology of exception classification and matching exception messages between .NET andJava environments. The methodology operates on existing exception class hierarchies and proposes two complementingapproaches: automated and manual matching. The automated matching uses the similarity measure to find associationsbetween exception messages from the two sets of classes for the considered programming languages....

  • Mechanizm automatycznego rozwoju usług sieciowych
    Publication

    - Year 2012

    Przedstawiono i omówiono koncepcje użycia usług sieciowych w środowisku produkcyjnym. Opisano komunikację i wpływ użytkowników na jakość tych usług. Zdefiniowano mechanizmy doboru usług do scenariusza i opisano mechanizm zapewniania ciągłości obsługi użytkowników, mimo ich błędnego działania.

  • Mechanizmy bezpieczeństwa w systemie Comcute
    Publication

    - Year 2012

    Wyróżniono podstawowe problemy związane z bezpieczeństwem przetwarzania w systemie utrzymania wielkiej mocy obliczeniowej w sytuacjach kryzysowych Comcute. Ponadto na przykładzie architektury systemu modelowego przedstawiono mechanizmy bezpieczeństwa przydatne do zastosowania w projekcie.

    Full text to download in external service

  • Merging Images From Parallel Depth Cameras
    Publication

    - Year 2012

    In this paper a problem of simultaneous information acquisition from multiple depth cameras is investigated, aiming at obtaining single overall picture containing information from all cameras. The experiments are carried out on Microsoft Kinect devices. A methodology for merging images from multiple positioned in a line cameras is proposed. The method is based on the concept of simulating a view of an imaginary camera covering...

  • Mersenne Number Finding and Collatz Hypothesis Verification in the Comcute Grid System
    Publication

    - Year 2012

    In this chapter, some mathematic applications have been described to test scalability of the Comcute grid system. Especially, a verification of the Collatz hypothesis and finding Mersenne numbers were applied to prove the scalability and high performance of this grid system. Results were compared with outcomes obtained by the other grid systems.

  • Multi agent grid systems
    Publication

    - Year 2012

    This chapter presents an idea of merging grid and volunteer systemswith multi agent systems. It gives some basics concerning multi agentsystem and the most followed standard. Some deliberations concerningsuch an existing systems were made in order to finally present possibilities of introducing agents into the Comcute system.

  • Obliczanie prawdopodobieństwa spójności grafów losowych
    Publication

    - Year 2012

    Zaproponowano metodę wykorzystania systemu Comcute do przeliczania prawdopodobieństwa grafów losowych. Obliczenia te mają zbyt dużą złożoność, aby dla dużych grafów przeprowadzać je na pojedynczym komputerze.

    Full text to download in external service

  • Ocena możliwości zautomatyzowanej analizy obrazów z badań endoskopowych do wspomagania diagnostyki gastropatii wrotnej
    Publication

    - Year 2012

    Analiza obrazów z powszechnie wykonywanych badań endoskopowych jest jedną z możliwych metod wykrywania wczesnego stadium gastropatii wrotnej fragmentów przewodu pokarmowego człowieka. W artykule przedstawiono opis eksperymentów związanych z utworzeniem autorskiego algorytmu wykrywania gastropatii na obrazach z nagrań badań endoskopowych w celu wspomagania procesu diagnostycznego. Przedstawiono cechy charakterystyczne schorzenia....

  • Ocena skuteczności wybranych metod klasyfikacji statycznych i dynamicznych gestów rąk
    Publication

    W artykule przedstawiono porównanie technik sztucznej inteligencji w aspekcie rozpoznawania statycznych i dynamicznych gestów rąk. Jako urządzenie wejściowe posłużyła bezprzewodowa elektroniczna rękawica e-Glove. Gesty rozpoznawane są w procesie analizy wartości sygnałów pochodzących z magnetometru i akcelerometrów trójosiowych. W referacie przedstawiono porównanie skuteczności wybranych technik zastosowanych w rozpoznawaniu gestów...

  • On Configurability of Distributed Volunteer-Based Computing in the Comcute System
    Publication

    - Year 2012

    The chapter proposes additional solutions that can be implemented within the Comcute system to increase its configurability. This refers to configuration of the reliability level in the W and S server layers, static or on-the-fly data partitioning and integration, configuration of the system for processing in the data streaming fashion, extending the system for selection of a project that the client wants to contribute to, ease...