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Wyświetlanie 1-15 z 31
Tytuł:
Cyberbezpieczeństwo w kryminalistyce
Autorzy:
Borkowski, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/20311659.pdf
Data publikacji:
2023-10-31
Wydawca:
Akademia Sztuki Wojennej
Tematy:
cybercrime
cybersecurity
forensics
database systems
firewall
Opis:
It is common to use terms like cybercrime and cybersecurity interchangeably. The distinction between the subject scope of both terms in the case of forensic science clearly indicates the direction of the tasks carried out in the areas of tactics and technology. In contrast to cybersecurity, the preventive function of forensic science is to create solutions that strengthen the resistance of information systems to actions that violate the confidentiality, integrity, accessibility, and authenticity of processed data or related services offered by these systems. Ensuring such resilience should be perceived in the context of the activities of entities performing public tasks with the use of cooperating IT devices and software by processing, storing, sending, and receiving data via telecommunications networks using a terminal device appropriate for a given type of telecommunications network.
Źródło:
Cybersecurity and Law; 2023, 10, 2; 167-182
2658-1493
Pojawia się w:
Cybersecurity and Law
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Database systems for tomorrow: new challenges and research areas
Autorzy:
Goczyła, K.
Powiązania:
https://bibliotekanauki.pl/articles/1954642.pdf
Data publikacji:
2003
Wydawca:
Politechnika Gdańska
Tematy:
database systems
new architectures
web technologies
non-relational models
integration
Opis:
Since the mid-80s, considerable progress has been achieved in relational database technology. The main achievements have been in high performance, high reliability and availability, scalability and development tools. However, the environment for database systems is rapidly changing. There are new challenges that originate from the present hardware technology achievements, as well as from new kinds of data resources that hardly conform to the well-established relational data model (e.g. data from the Web). In the paper, we present the new challenges and research areas, as well as motivations behind them.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2003, 7, 2; 272-278
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Federated Database Systems in Supply Chain Management
Autorzy:
Paszkowski, J.
Marchlewska, A.
Przybyszewski, K.
Powiązania:
https://bibliotekanauki.pl/articles/108696.pdf
Data publikacji:
2012
Wydawca:
Społeczna Akademia Nauk w Łodzi
Tematy:
soft computing
supply chain management
databases
federated database systems
middle software
Opis:
The article shows the possible ways of use of federated database technologies in data management in the logistic chains of companies. The architectures and components of software for creating the federated systems and some suggestions for the architecture of data management information systems for companies are presented in the text. The mentioned solution stands a proposal to resolve the difficult problem of cooperation between the computer information systems in companies, which refers to making the data of company available to the external users and managing data in the logistic chain. The authors included an overall review of commercial software, which can be used to build the software of data managing in the chains of cooperating companies.
Źródło:
Journal of Applied Computer Science Methods; 2012, 4 No. 2; 55-66
1689-9636
Pojawia się w:
Journal of Applied Computer Science Methods
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance Modeling of Database Systems: a Survey
Autorzy:
Krajewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/309263.pdf
Data publikacji:
2018
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
database systems
NoSQL data stores
performance evaluation
queueing networks
queueing Petri nets
Opis:
This paper presents a systematic survey of the existing database system performance evaluation models based on the queueing theory. The continuous evolution of the methodologies developed is classified according to the mathematical modeling language used. This survey covers formal models – from queueing systems and queueing networks to queueing Petri nets. Some fundamentals of the queueing system theory are presented and queueing system models are classified according to service time distribution. The paper introduces queueing networks and considers several classification criteria applicable to such models. This survey distinguishes methodologies, which evaluate database performance at the integrated system level. Finally, queueing Petri nets are introduced, which combine modeling power of queueing networks and Petri nets. Two performance models within this formalism are investigated. We find that an insufficient amount of research effort is directed into the area of NoSQL data stores. Vast majority of models developed focus on traditional relational models. These models should be adapted to evaluate performance of non-relational data stores.
Źródło:
Journal of Telecommunications and Information Technology; 2018, 4; 37-45
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On Forming Key Competences within the ICT-supported Instruction in Higher Education
Autorzy:
Šimonová, Ivana
Poulová, Petra
Sokolová, Marcela
Bílek, Martin
Powiązania:
https://bibliotekanauki.pl/articles/2028740.pdf
Data publikacji:
2014-03-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
ICT
key competences
online courses
e-learning
learning styles
Database Systems
Management
IT English
Opis:
The paper presents research results of the two-year pedagogical experiment comparing test scores in three subjects (Database Systems, Management, IT English) taught either in the ICT-supported way, or in the traditional face-to-face way at the Faculty of Informatics and Management, University of Hradec Kralove, Czech Republic. The main research objective was to find out whether ICT contribute to increasing learners’ knowledge and consequently to forming key competences. Didactic tests as the main tool were used within the pedagogical experiment which followed the “pre-test - instruction - post-test - post-test2” structure. The research sample included 687 respondents. Obtained results proved there were no statistically significant differences in learners’ knowledge in both approaches to instruction. The results were discussed from two important points of view: (1) teachers’ and learners’ ability to use the potential of ICT in teaching/learning and (2) the role of teaching/learning styles in the ICT-supported instruction.
Źródło:
The New Educational Review; 2014, 35; 134-147
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The architecture of modern database systems
Autorzy:
Goczyła, K.
Powiązania:
https://bibliotekanauki.pl/articles/1954011.pdf
Data publikacji:
1998
Wydawca:
Politechnika Gdańska
Tematy:
modern architecture
large database systems
parallel architecture
distributed architecture
highly efficient distributed architecture
client-server architecture
Opis:
The paper presents major trends in the modern architecture of large database systems. Two types of architecture are described in detail: the parallel architecture and the distributed architecture. It has been widely recognised that centralised, single processor computing systems and centralised database systems in particular are approaching their theoretical limits of performance. Hence we can observe a growing interest among researchers and developers in the design and implementation of highly efficient distributed architecture. The paper focuses on different types of client-server architecture, which nowadays is becoming very popular in data processing systems.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 1998, 2, 1; 107-119
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Appraisal of Abuja Master Plan Using GIS: A Case Study of Abuja Phase I, Federal Capital Territory, Abuja, Nigeria
Autorzy:
Amusa, Idowu Adigun
Ibe, Philip Ongboku
Akolo, Festus Olusanya
Powiązania:
https://bibliotekanauki.pl/articles/1178353.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Abuja
Geographic Information Systems and Database
Master plan
Opis:
The study designed and created a geospatial database for the entities in the study area. The database was subjected to test by issuing single criterion and multiple criteria queries. The single criterion query was issued to test the database on the number of parcels in the study area that are equal to or less than 1500 m2. This is the standard area of a plot when the Abuja Master plan was conceptualized. The query returned 642 parcels out of the 1490 parcels in the study area representing 43.09 percent of the total. The multiple criteria query was issued to show those parcels with more than 25,000 m2 and are developed. The query returned less than 1 percent; that is 11 parcels fall into this category. Buffering was carried out to see the level of compliance of buildings with the 3.0m setback from the fencing walls and the result returned 1725 buildings out of the 3822 buildings within the study area that did not comply with this rule. The parcels were also subjected to a setback of 20m from the river channels in the study area. The rivers were buffered with 20m and overlaid with the parcels. 133 parcels fall within the buffer zone. This is about 8.92 percent of the total parcels in the study area. The implication is that over 90 percent are safe in case there is flooding that spreads around that distance. Graduated colour renderer was used to classify the parcels using the sizes as parameter for the classification.
Źródło:
World Scientific News; 2017, 77, 2; 144-162
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermodynamic Description of Ternary Fe-B-X Systems. Part 4: Fe-B-V
Autorzy:
Miettinen, J.
Visuri, V.-V.
Fabritius, T.
Milcheva, N.
Vassilev, G.
Powiązania:
https://bibliotekanauki.pl/articles/355188.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
phase diagrams
thermodynamic modelling
Fe-based systems
Fe-B-X systems thermodynamic database
Fe-B-V system
Opis:
Thermodynamic descriptions of the ternary Fe-B-V system and its binary sub-system B-V, are developed using experimental thermodynamic and phase equilibrium data from the literature. The thermodynamic parameters of the other binaries, Fe-V and Fe-B, are taken from earlier assessments slightly modifying the Fe-V description. The work is in the context of a new Fe-B-X (X = Cr, Ni, Mn, V, Si, Ti, C) database. The solution phases are described using substitutional solution model. The borides are treated as stoichiometric or semistoichiometric phases and described with two-sublattice models.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 2; 451-456
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An efficient approach for view selection for data warehouse using tree mining and evolutionary computation
Autorzy:
Thakare, A.
Deshpande, P.
Powiązania:
https://bibliotekanauki.pl/articles/305413.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
database management systems
data warehousing and data mining
query optimization
graph mining
algorithms for parallel computing
evolutionary computations
genetic algorithms
Opis:
The selection of a proper set of views to materialize plays an important role in database performance. There are many methods of view selection that use different techniques and frameworks to select an efficient set of views for materialization. In this paper, we present a new efficient scalable method for view selection under the given storage constraints using a tree mining approach and evolutionary optimization. The tree mining algorithm is designed to determine the exact frequency of (sub)queries in the historical SQL dataset. The Query Cost model achieves the objective of maximizing the performance benefits from the final view set that is derived from the frequent view set given by the tree mining algorithm. The performance benefit of a query is defined as a function of query frequency, query creation cost, and query maintenance cost. The experimental results show that the proposed method is successful in recommending a solution that is fairly close to an optimal solution.
Źródło:
Computer Science; 2018, 19 (4); 431-455
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermodynamic Description of Ternary Fe-B-X Systems. Part 5: Fe-B-Si
Autorzy:
Miettinen, J.
Visuri, V.-V.
Fabritius, T.
Milcheva, N.
Vassilev, G.
Powiązania:
https://bibliotekanauki.pl/articles/355656.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
phase diagrams
thermodynamic modeling
Fe-based systems
Fe-B-X systems thermodynamic database
Fe-B-Si system
Opis:
Thermodynamic descriptions of the ternary Fe-B-Si system and its binary sub-system, B-Si, are developed in the context of a new Fe-B-X (X = Cr, Ni, Mn, V, Si, Ti, C) database. The thermodynamic parameters of the other binary sub-systems, Fe-Si and Fe-B, are taken from earlier assessments. Experimental thermodynamic and phase equilibrium data available in the literature has been used for the optimization of the thermodynamic parameters of the Fe-B-Si and B-Si systems. The solution phases are described using substitutional solution model and the compounds (silicides and borides) are treated as stoichiometric phases. The calculated and experimental thermodynamic and phase equilibrium data were found to be in good agreement.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 4; 1239-1248
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermodynamic Description of Ternary Fe-B-X Systems. Part 6: Fe-B-Ti
Autorzy:
Miettinen, J.
Visuri, V.-V.
Fabritius, T.
Milcheva, N.
Vassilev, G.
Powiązania:
https://bibliotekanauki.pl/articles/356115.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
phase diagrams
thermodynamic modeling
Fe-based systems
Fe-B-X systems thermodynamic database
Fe-B-Ti system
Opis:
Thermodynamic optimizations of the ternary Fe-B-Ti system and its binary sub-system, B-Ti are presented. The thermodynamic descriptions of the other binaries, Fe-Ti and Fe-B, are taken from the earlier studies slightly modifying the Fe-Ti system assessment. The adjustable parameters of the Fe-B-Ti and B-Ti systems are optimized in this study using the experimental thermodynamic and the phase equilibrium data from the literature. The solution phases of the system are described using the substitutional solution model and the compounds (including borides) are treated as stoichiometric phases. The results show a good correlation between the calculated and measured thermodynamic and phase equilibrium data.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 4; 1249-1255
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
System POTOK: Forests ecosystem components projection with database and digital vector maps use
Autorzy:
Valenta, M.
Czarniecka, A.
Powiązania:
https://bibliotekanauki.pl/articles/1941710.pdf
Data publikacji:
2000
Wydawca:
Politechnika Gdańska
Tematy:
ecosystem
forest
GIS
geographic information systems
hydrology
relational database
Opis:
The composition presents a prototype solution (system POTOK) of a complex problem such as advanced assistance for researches in hydrological terms of forest areas. The idea of this system was based on a junction of two technologies: relational database and digital projection of space. The database is a ground of application that allowed creating ad hoc queries accomplished by advanced processing and also gives wide prospects of visualising the results (in 3D). The system could be used in related branches of science.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2000, 4, 1; 91-101
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermodynamic Description of Ternary Fe-B-X Systems. Part 9: Fe-B-Cu
Autorzy:
Miettinen, Jyrki
Visuri, Ville-Valtteri
Fabritius, Timo
Powiązania:
https://bibliotekanauki.pl/articles/2049545.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
phase diagrams
thermodynamic modelling
thermodynamic database
Fe-based systems
Fe-B-X systems
Fe-B-Cu system
Opis:
Thermodynamic descriptions of the ternary Fe-B-Cu system and its binary sub-system B-Cu aredeveloped in the context of a new Fe-B-X (X = Cr, Cu, Mn, Mo, Ni, Si, Ti, V, C) database. The thermodynamic parameters of the other binary sub-systems (Fe-B and Fe-Cu) are taken from earlier assessments. Experimental thermodynamic and phase equilibrium data available in the literature have been used for the optimization of the Fe-B-Cu and B-Cu systems’ thermodynamic parameters. The solution phases are described using a substitutional solution model and the compounds (two borides of the Fe-B system) are treated as stoichiometric phases. A good agreement was obtained between the calculated and the experimental thermodynamic and phase equilibrium data.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 1; 297-304
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermodynamic Description of Ternary Fe-B-X Systems. Part 1: Fe-B-Cr
Opis termodynamiczny trójskładnikowych układów Fe-B-X. Część 1: Fe-B-Cr
Autorzy:
Miettinen, J.
Vassilev, G.
Powiązania:
https://bibliotekanauki.pl/articles/353802.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
phase diagrams
thermodynamic modelling
Fe-based systems
Fe-B-X systems thermodynamic database
Fe-B-Cr system
diagramy fazowe
modelowanie termodynamiczne
układy na bazie Fe
termodynamiczne układy Fe-B-X
układ Fe-B-Cr
Opis:
A thermodynamic description of the Fe-B-Cr system is developed in the context of a new Fe-B-X (X = Cr, Ni, Mn, Si, Ti, V, C) database. The thermodynamic parameters of the binary sub-systems, Fe-B, Fe-Cr and B-Cr, are taken from earlier assessments slightly modifying the Fe-B and B-Cr descriptions, and those of the ternary system are optimized in this study using experimental thermodynamic and phase equilibrium data from the literature. The solution phases are described using substitutional solution model. The borides are treated as stoichiometric or semi-stoichiometric phases and described with two-sublattice models.
Przedstawiono termodynamiczny opis trójskładnikowego układu Fe-B-Cr w kontekście bazy danych dla układów Fe-B-X (X = Cr, Ni, Mn, Si, Ti, V, C). Parametry termodynamiczne dwuskładnikowych stopów Fe-Mn, Fe-B i Mn-B zostały są zaczerpnięte z wcześniejszych opracowań, przy tym opisy Fe-B i B-Cr zostały nieznacznie zmodyfikowane. Parametry dla układu Fe-Mn-B zostały zoptymalizowane w tej pracy w oparciu o eksperymentalne równowagi fazowe i dane termodynamiczne zaczerpnięte z literatury. Roztwory stałe opisano przy użyciu modelu roztworu substytucyjnego, a borki traktowane są jako fazy stechiometryczne lub półstechiometryczne opisane przy użyciu modelu dwu podsieci.
Źródło:
Archives of Metallurgy and Materials; 2014, 59, 2; 601-607
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Database for the purpose of integrated coastal zone management
Autorzy:
Gajewski, J.
Stachowiak, A.
Żarki, I.
Powiązania:
https://bibliotekanauki.pl/articles/1941709.pdf
Data publikacji:
2000
Wydawca:
Politechnika Gdańska
Tematy:
integrated coastal zone management
GIS
geographic information systems
database design
GIS internet access
Opis:
The database was created in response to the need of obtaining complex information necessary for efficient management of the Polish coastal zone. Database preparation processes are co-ordinated within the EU PHARE project focusing on harmonising such databases in Estonia, Lithuania, Latvia and Poland. The majority of the information concerns the geographical objects, therefore the database was generated with application of Geographic Information Systems.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2000, 4, 1; 103-107
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 31

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