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Tytuł:
C2 NIWA – the centre of competence for novel infrastructure of workable applications
Autorzy:
Krawczyk, H.
Powiązania:
https://bibliotekanauki.pl/articles/1941701.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska
Tematy:
scientific computations
cloud and service computing paradigms
service-oriented applications
service-oriented software engineering
C2 NIWA functionality
Opis:
Scientific and cloud computing are discussed in the paper. The paradigm of EaaS (Everything as a Service) is presented and the design methodology of service oriented applications is proposed. Implementation of the SOSE (Software Oriented Software Engineering) approach is analyzed and the roles of developing teams to obtain software products satisfying business requirements are also shown. The above listed activities create a basic functionally of the C2 NIWA centre recently established in the Gdansk University of Technology.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2015, 19, 4; 357-369
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Achieving high dependability of an endoscopy recommender system (ERS)
Autorzy:
Zieliński, J.
Krawczyk, H.
Powiązania:
https://bibliotekanauki.pl/articles/1965771.pdf
Data publikacji:
2004
Wydawca:
Politechnika Gdańska
Tematy:
telemedicine
security
dependability
replication
Opis:
The paper presents a strategy for achieving high dependability of a computer-based system devoted to endoscopic examination (ERS). Two levels of replication are used: hardware (3 computers) and database (redundant copies). Archivisation of documents describing patient examinations and films made during such examinations is described. The influence of the used techniques on performance and dependability of the replicated system is estimated.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2004, 8, 2; 237-242
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mobile devices and computing cloud resources allocation for interactive applications
Autorzy:
Krawczyk, H.
Nykiel, M.
Powiązania:
https://bibliotekanauki.pl/articles/229566.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mobile devices
computing cloud
task allocation
optimization
Opis:
Using mobile devices such as smartphones or iPads for various interactive applications is currently very common. In the case of complex applications, e.g. chess games, the capabilities of these devices are insufficient to run the application in real time. One of the solutions is to use cloud computing. However, there is an optimization problem of mobile device and cloud resources allocation. An iterative heuristic algorithm for application distribution is proposed. The algorithm minimizes the energy cost of application execution with constrained execution time.
Źródło:
Archives of Control Sciences; 2017, 27, 2; 293-307
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enterprise activities modeling by BPMN notation
Autorzy:
Krawczyk, H.
Parsamyan, N.
Powiązania:
https://bibliotekanauki.pl/articles/94913.pdf
Data publikacji:
2017
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
process modeling
enterprise activities
BPMN
Business Process Model and Notation
development strategy improvement
Opis:
Depending on the process behavior, available know-how and organizational goals, different techniques and tools can be used for business process modeling. We concentrate on e-commerce, and try to find the best marketing strategy for the sales process improvement. In the paper we present the multilayer approach to define enterprise scenarios. This allows us to collect the suitable knowledge necessary for enterprise analysis and improvement. Moreover, we use BPMN notation to formalize this approach and show its capability for the concrete example of an e-shop.
Źródło:
Information Systems in Management; 2017, 6, 3; 203-112
2084-5537
2544-1728
Pojawia się w:
Information Systems in Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Information society development trends, from data through knowledge to wisdom
Autorzy:
Krawczyk, H.
Targowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/1940558.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska
Tematy:
data
information
knowledge
wisdom
society development
human abilities
dane
Informacja
wiedza
mądrość
rozwój społeczeństwa
zdolności człowieka
Opis:
The paper investigates both the causes and effects of the rapid increase in the data volume (Big Data) and their impact on human cognition. The role of the Internet in distributing and exchanging of such data, and their impact on the growth of the Information Society are emphasized. As a result, Wisdom Science – a new kind of research – emerges which has the potential to facilitate more advanced solutions in the digital world. In consequence, new kinds of info-driven devices, services and systems called “smart” are developed and applied in almost every aspect of human activities around the world. However, this is not enough for humans to use all those well-informed smart devices and systems because, first of all, their decisions should be wise. Therefore, the paper, coming from a cognitive informatics approach defines wisdom and its applications, illustrated by some practical cases. Based on this, relations between knowledge and wisdom are shown, and human abilities corresponding to them are defined. They can decide about a transformation of a knowledge society to a wisdom society.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2017, 21, 4; 343-353
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multidisciplinary open system transferring knowledge for R2B development
Autorzy:
Krawczyk, H.
Lubomski, P.
Powiązania:
https://bibliotekanauki.pl/articles/1940562.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska
Tematy:
open science
innovations
knowledge transfer
R2B cooperation
R2B supporting portals
otwarta nauka
innowacje
transfer wiedzy
współpraca R2B
wsparcie portali R2B
Opis:
Despite many efforts, there is still a serious problem in transferring knowledge from research to business. The problem is especially visible in Poland – the cooperation of R2B is ineffective. We are trying to solve this problem using some IT support. The manuscript presents some solutions developed at the Gdańsk University of Technology. In particular, the platform called “MOST Knowledge” is deeply described. Its layer architecture, and some new services which it offers are shown. A new interdisciplinary approach is proposed to communicate and support the cooperation of these different worlds. Summarizing, a short comparison with other available platforms is included and discussed.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2017, 21, 4; 299-308
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An architecture of execution environment for context-aware applications running in intelligent space
Architektura środowiska wykonywania aplikacji kontekstowych dla przestrzeni inteligentnych
Autorzy:
Nasiadka, S.
Krawczyk, H.
Powiązania:
https://bibliotekanauki.pl/articles/282144.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
context-aware application
application model
environment architecture
intelligent space
aplikacja kontekstowa
model aplikacji
architektura środowiska
przestrzeń inteligentna
Opis:
Context-aware applications running in intelligent spaces are one of the most dynamically developed group of applications. Their model called CAA (Context-Aware Applications) on the one hand allows to express their interactivity with regard to cooperation with an intelligent space and their users. On the other hand it shows their iterative nature that allows to analyze context-aware part of the application according to iterative algorithms. Applications defined in that way can be executed directly be the intelligent space. However, to do that the space needs to be enhanced with a special engine delivering particular mechanisms. The article describes such engine called Parallel CAA, its architecture and implementation. The implementation creates a CAA execution environment.
Aplikacje kontekstowe działające w przestrzeniach inteligentnych są dynamicznie rozwijającą się grupą aplikacji. Ich model -IAI (Interaktywna Aplikacja Kontekstowa; ang. CAA) z jednej strony pozwala wyrazić ich interaktywność w odniesieniu do współdziałania z przestrzenią inteligentną i jej użytkownikami. Z drugiej strony obrazuje on iteracyjny charakter ich wykonywania, umożliwiający rozpatrywanie kontekstowej części aplikacji (tzn. działania dotyczącego dostosowywania do sytuacji w przestrzeni) w kategoriach algorytmów iteracyjnych. Aplikacje zdefiniowane w przy wykorzystaniu modelu IAI mogą być wykonywane bezpośrednio przez przestrzeń inteligentną. Jednakże w tym celu konieczne jest umieszczenie w niej specjalnego silnika dostarczającego określonych mechanizmów. Artykuł opisuje wynikającą z modelu IAI maszynę Parallel IAI (ang. Parallel CAA) będącą podstawą do utworzenia takiego silnika, wynikającą z niego właściwą architekturę oraz jej implementację, stanowiącą środowisko wykonywania aplikacji IAI.
Źródło:
Automatyka / Automatics; 2013, 17, 2; 207-217
1429-3447
2353-0952
Pojawia się w:
Automatyka / Automatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
55 lat Wydziału Elektroniki, Telekomunikacji, Informatyki Politechniki Gdańskiej
Autorzy:
Krawczyk, H.
Nowakowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/153802.pdf
Data publikacji:
2008
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
Wydział Elektroniki, Telekomunikacji i Informatyki
Politechnika Gdańska
Źródło:
Pomiary Automatyka Kontrola; 2008, R. 54, nr 3, 3; 83-86
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tryton supercomputer capabilities for analysis of massive data streams
Autorzy:
Krawczyk, H.
Nykiel, M.
Proficz, J.
Powiązania:
https://bibliotekanauki.pl/articles/259474.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
supercomputer
data streams
distributed systems
radio-telescope
satellite
Opis:
The recently deployed supercomputer Tryton, located in the Academic Computer Center of Gdansk University of Technology, provides great means for massive parallel processing. Moreover, the status of the Center as one of the main network nodes in the PIONIER network enables the fast and reliable transfer of data produced by miscellaneous devices scattered in the area of the whole country. The typical examples of such data are streams containing radio-telescope and satellite observations. Their analysis, especially with real-time constraints, can be challenging and requires the usage of dedicated software components. We propose a solution for such parallel analysis using the supercomputer, supervised by the KASKADA platform, which with the conjunction with immerse 3D visualization techniques can be used to solve problems such as pulsar detection and chronometric or oil-spill simulation on the sea surface.
Źródło:
Polish Maritime Research; 2015, 3; 99-104
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
KASKADA platform in cloud environment
Autorzy:
Krawczyk, H.
Proficz, J.
Daca, B.
Powiązania:
https://bibliotekanauki.pl/articles/1941699.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska
Tematy:
KASKADA
cloud computing
PaaS
CD NIWA
OpenStack
Opis:
KASKADA is a computing platform for developing and running services and applications oriented to multimedia processing and data streaming. A solution for serving the platform in the PaaS model is presented. The paper briefly describes the software for creating the private cloud solutions and the components designed and implemented to enable hosting the platform in the cloud environment based on the OpenStack software. The cloud has been deployed to a supercomputer working in C2 NIWA at the Gdansk University of Technology. This article assumes the reader’s basic knowledge of the KASKADA platform.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2015, 19, 4; 371-386
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of multimedia applications in a cluster-oriented environment
Autorzy:
Czarnul, P.
Dziubich, T.
Krawczyk, H.
Powiązania:
https://bibliotekanauki.pl/articles/220601.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
quality measurements
software quality
quality model and measures
parallel computing
distributed middleware
multimedia applications
Opis:
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 the producttime to market process. On the other hand, it raises questions about the quality of the application, trade-offs between quality factors and attributes and measurements of these. Services are usually hosted and executed in an environment managed by its provider that assures the quality attributes such as availability or throughput. Therefore, in this paper an attempt has been made to perform quality measurements towards the creation of efficient, dependable and user-oriented Web applications. First, the process of designing service-based applications is described. Next, metrics for subsequent measurements of efficiency, dependability and usability of distributed applications are presented. These metrics will assess the efforts and trade-offs in a Web-based application development. As examples, we describe a pair of multimedia applications which we have developed in our department and executed in a cluster-based environment. One of them runs in the BeesyCluster middleware and the second one in the Kaskada platform. For these applications we present results of measurements and conclude about relations between quality attributes in the presented application development model. This knowledge can be used to reason about such relations for new similar applications and be used in rapid and quality development of the latter.
Źródło:
Metrology and Measurement Systems; 2012, 19, 2; 177-190
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Parallel processing of multimedia streams
Autorzy:
Krawczyk, H.
Bańczyk, K
Proficz, J.
Powiązania:
https://bibliotekanauki.pl/articles/97509.pdf
Data publikacji:
2010
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
multimedia stream
Opis:
The paper presents a new multimedia processing platform: KASKADA. The design of the platform is described: the diagram of main classes, the sequence diagram illustrating their cooperation during the processing of multimedia streams, and the details of the intertask communication mechanism. We also present the framework supporting algorithm development, a service scenario definition, and provide evaluation of the platform usability.
Źródło:
Computer Applications in Electrical Engineering; 2010, 8; 9-25
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A parallel genetic algorithm for creating virtual portraits of historical figures
Autorzy:
Krawczyk, H.
Proficz, J.
Ziółkowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/1933983.pdf
Data publikacji:
2012
Wydawca:
Politechnika Gdańska
Tematy:
genetic algorithms
fitness function
KASKADA platform
parallel processing
high performance computing
Opis:
In this paper we present a genetic algorithm (GA) for creating hypothetical virtual portraits of historical figures and other individuals whose facial appearance is unknown. Our algorithm uses existing portraits of random people from a specific historical period and social background to evolve a set of face images potentially resembling the person whose image is to be found. We then use portraits of the person’s relatives to judge which of the evolved images are most likely to resemble his/her actual appearance. Unlike typical GAs, our algorithm uses a new supervised form of fitness function which itself is affected by the evolution process. Additional description of requested facial features can be provided to further influence the final solution (i.e. the virtual portrait). We present an example of a virtual portrait created by our algorithm. Finally, the performance of a parallel implementation developed for the KASKADA platform is presented and evaluated.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2012, 16, 1-2; 145-162
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnonic Spectra of Ferromagnetic Composites Versus Magnetization Contrast
Autorzy:
Krawczyk, M.
Puszkarski, H.
Powiązania:
https://bibliotekanauki.pl/articles/1968941.pdf
Data publikacji:
1998-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Gg
Opis:
It had been shown recently that the calculated magnonic spectra of two-dimensional periodic ferromagnetic composites can present frequency ranges forbidden for the propagation of magnon excitations throughout the composite. However, those forbidden energy gaps were found to be highly sensitive to the exchange contrast between the component ferromagnetic materials but were very weakly sensitive to the contrast in spontaneous magnetizations of the two materials. Accordingly, in this paper we introduce a new mathematical definition of the exchange field acting in inhomogeneous medium. With this new definition the present theory gives magnonic spectra reasonably sensitive to magnetization contrast, as they should be from the physical viewpoint; moreover, the magnetization contrast now becomes a gap-creating factor as well.
Źródło:
Acta Physica Polonica A; 1998, 93, 5-6; 805-810
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Treatment of the Periodically Inhomogeneous Surface: Multiple Boundary Condition
Autorzy:
Puszkarski, H.
Krawczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/2014016.pdf
Data publikacji:
2000-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.35.-p
02.60.Lj
Opis:
We deal with the following question: how can the composite nature of a boundary condition formulated for a periodically inhomogeneous surface and involving the composite surface parameter, be treated analytically? We show that when the appropriate Fourier transformation is applied, the composite boundary condition reduces to a specific eigenproblem condition, which constitutes the spectrum of eigenvalues of an "effective" surface parameter, a novel quantity we introduced to account for the nonhomogeneity of the surface.
Źródło:
Acta Physica Polonica A; 2000, 97, 6; 1017-1022
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 30

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