Autor: Pietak, K. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Formy skalne jako wartość środowiska przyrodniczego Parku Krajobrazowego Dolinki Podkrakowskie
Rock formations as sources of environmental value in the Krakow Valley Landscape Park
Autorzy:: Balon, J.
Pietak, K.
Powiązania:: https://bibliotekanauki.pl/articles/85752.pdf
Data publikacji:: 2010
Wydawca:: Polska Asocjacja Ekologii Krajobrazu
Tematy:: formy skalne
wartosc srodowiska
potencjal srodowiska przyrodniczego
Źródło:: Problemy Ekologii Krajobrazu; 2010, 27
1899-3850
Pojawia się w:: Problemy Ekologii Krajobrazu
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Verification mechanism for lightweight componenent-based environment based on ioc container
Autorzy:: Leszko, R.
Piętak, K.
Powiązania:: https://bibliotekanauki.pl/articles/305795.pdf
Data publikacji:: 2013
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: verification
component-based systems
functional integrit
Opis:: This paper presents a concept of component verification framework dedicated to a particular lightweight component environment. The starting point of the paper constitutes a discussion about the significance of verification of syntax in- consistencies in software development. Next, the need of verification in service-oriented and component-based systems is presented, and various approaches of verification in existing component environments are explained. The main part of the paper introduces a concept of functional integrity of component-based systems that utilize verification mechanisms which check consistency between components. The proposed solution is built on a fine-grained component environment (close to classes similarly to the Spring Framework) realized in the AgE platform. Selected technical aspects of framework design illustrate the considerations of the paper.
Źródło:: Computer Science; 2013, 14 (4); 577-588
1508-2806
2300-7036
Pojawia się w:: Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Analiza kryminalna wspomagana narzędziami GIS w aplikacji LINK
Criminal intelligence supported with spatial analysis tools in LINK application
Autorzy:: Marcjan, R.
Łakomy, M.
Wysokiński, M.
Piętak, K.
Kisiel-Dorohinicki, M.
Powiązania:: https://bibliotekanauki.pl/articles/120510.pdf
Data publikacji:: 2013
Wydawca:: Akademia Sztuki Wojennej
Tematy:: analiza kryminalna
wspomaganie decyzji
GIS (Geographical Information System)
decision support
criminal analysis
geographic information system (GIS)
Opis:: The aim of the paper is to present the possibilities of utilizing spatial (geographical) information in the criminal analysis and to introduce the LINK software, which is able to perform such analyses. LINK is a decision-support system dedicated for operational and investigational activities of homeland security services. The paper briefly discusses issues of criminal analysis in the Polish reality and focuses on crime mapping and spatial analyses. It also lists available analysis methods and software tools together with their pros and con. The description of LINK system functionality constitutes the main part of the paper. It covers the tasks of data acquisition, processing, analysis and visualization. In addition to that the paper also includes a description of the integration possibilities of LINK and ESRI’s ArcGIS application stack and performing complex geospatial analyses.
Źródło:: Zeszyty Naukowe AON; 2013, 4(93); 326-345
0867-2245
Pojawia się w:: Zeszyty Naukowe AON
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Collectively intelligent prediction in evolutionary multi-agent system
Autorzy:: Kijak, J.
Martyna, P.
Byrski, A.
Faber, Ł.
Piętak, K.
Kisiel-Dorohinicki, M.
Powiązania:: https://bibliotekanauki.pl/articles/397728.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:: evolutionary neural networks
agent-based computing
time series prediction
collective intelligence
metaheuristic optimization
ewolucyjne sieci neuronowe
obliczenia agentowe
predykcja szeregów czasowych
inteligencja zbiorowa
optymalizacja metaheurystyczna
Opis:: In the paper a summary of our previously realized and published work connected with constructing collective intelligent evolutionary multi-agent systems for time series prediction, based on multi-layered perceptrons is shown. Besides recalling our past papers, we describe the whole concept, present an implementation in a contemporary, componentoriented software framework AgE 3.0 and we conduct a number of experiments, finding different optimal parametrization for the considered instances of the problems (popular Mackey-Glass chaotic time series). The paper may be useful for a practitioner willing to use our meatheuristic algorithm (EMAS) along with the idea of collective agent-based system in order to realize prediction tasks.
Źródło:: International Journal of Microelectronics and Computer Science; 2017, 8, 3; 85-96
2080-8755
2353-9607
Pojawia się w:: International Journal of Microelectronics and Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Physicochemical properties of fuel compositions obtained from diesel fuel and different kinds of fatty raw material
Autorzy:: Duda, K.
Piętak, A.
Powiązania:: https://bibliotekanauki.pl/articles/241877.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: biodiesel quality examination
biodiesel mixture
animal fat biodiesel
vegetable oil biodiesel
transesterification
Opis:: Increased interest in development of alternative fuels used to power combustion engines is caused by excessive use of fuels obtained from mineral sources. Depletion of resources, political aspects as well as the negative impact on the environment are commonly discussed issues in relation to fossil fuels. On the other hand, biodegradability, lower toxic components emissions and interchangeability with mineral fuels are commonly described benefits related to biodiesel, interpreted as fatty acid methyl esters obtained from fatty raw material. Also the multiplicity of raw materials that can be used for production promotes popularization of the biodiesel. However the variety of raw materials can have significant impact on the number of physicochemical properties of alternative fuels due to the differences in molecular structures forming given type of raw material. The article presents analysis of properties of different types of biodiesel and its mixtures with diesel according to the outlines presented in the quality standards for mineral and alternative fuels. Alternative fuels were produced in the laboratory setup from swine, poultry, rape and sunflower fatty raw material. Such parameters as: density, kinematic viscosity, flash point, acid value, oxidation stability, cold filter plugging point, sulphur content, water content and total contamination were examined, based on the results, the quality of the biofuels was evaluated. Study confirms that biofuels derived from plant origin fatty raw material present favorable results in the aspect water content, total contamination, acid value and cold flow properties, thus biofuels derived from animal origin raw fatty material presents lower density and sulphur content.
Źródło:: Journal of KONES; 2018, 25, 3; 137-143
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Vibration energy harvesting in the transportation system: a review
Odzyskiwanie energii z drgań w systemie transportowym: przegląd
Autorzy:: Radkowski, S.
Lubikowski, K.
Piętak, A.
Powiązania:: https://bibliotekanauki.pl/articles/329398.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:: odzysk energii
wzmacniający generator dynamiczny
mechanizm działania
strojenie częstotliwościowe
energy harvesting
inertial generators dynamic magnifier
transolution mechanisms
frequency tuning
Opis:: This review presents different approaches of kinematic energy harvesting. Energy harvesting is the conversion at ambient energy present in the transportation system into electrical energy. Most vibration energy harvesters are based on spring-mass-damper systems which generate maximum power when the frequency of the ambient vibration fits the resonant frequency of harvester. The strategy of the reduction of this limitation is discussed in the paper. At first the periodic tuning of the resonant frequency is explained. Additionally the method of continuous tuning is presented. The emphasis is placed on maximizing the power transferred from the energy harvester to the output load. It is consider the possibility of using a dynamic magnifier in order to amplify the harvested electrical power. It is showed that the proper parameter selection of the magnifier the power can be enhanced and the effective frequency bandwidth of the generator can be improved. Next is presented a comprehensive review of the principles mechanisms of transformation the kinematic energy into electrical energy. The three main transduction methods are based on piezoelectric, electromagnetic and electrostatic phenomena. Piezoelectric harvesters use active materials that generate an electric charge when stressed mechanically. Electromagnetic generators change the relative motion of conduction in magnetic field, on the principle at electromagnetic inductions. Electrostatic generators convert the relative movements between charged capacitor plates into electrical energy. The advantages and disadvantages of each are described and evaluated and the relevant merits of each approach are concluded.
Publikacja prezentuje różne podejścia w odzyskiwaniu energii ruchu. Odzysk energii rozumiany jest jako konwersja otaczającej energii obecnej w systemie transportowym w energię elektryczną. Większość systemów (urządzeń) dokonujących tej transformacji bazuje na układzie sprężyna-masa-tłumik, które generują największą moc jeśli częstotliwość istniejących drgań odpowiada częstotliwości rezonansowej układu transformującego. W pracy została omówiona strategia zlikwidowania przytoczonego ograniczenia. Jako pierwszy został wyjaśniony mechanizm okresowego dostrajania częstotliwości rezonansowej. Fakultatywnie przedstawiono metodę ciągłego jej strojenia. Jednak głównie położono nacisk na maksymalizację mocy przekazywanej z układu odzyskującego energię do obciążenia wyjściowego. Rozważono możliwość zastosowania wzmacniacza dynamicznego, którego zadaniem jest zwiększenie odzyskanej energii elektrycznej. Zostało wykazane, że właściwy wybór parametrów takiego wzmacniacza, zwiększa wydajność energetyczną, jak również szerokość efektywnego pasma częstotliwości generatora. Kolejno przedstawiono obszerny przegląd zasad mechanizmów transformacji energii kinematycznej w energię elektryczną. Opisano trzy główne metody transdukcji, które opierają się na następujących zjawiskach: piezoelektrycznym, elektromagnetycznym i elektrostatycznym. System odzyskujący bazujący na efekcie piezoelektrycznym, wykorzystuje aktywne materiały, które generują ładunek elektryczny pod wpływem występowania naprężeń mechanicznych. Generatory elektromagnetyczne transformują ruch względny przewodnika w polu magnetycznym, na zasadzie indukcji elektromagnetycznej. Natomiast generatory elektrostatyczne zamieniają względne przesunięcia pomiędzy naładowanymi okładkami kondensatora w energię elektryczną. Zalety i wady każdego ze sposobów odzyskiwania energii zostały opisane i ocenione a dodatkowo wyszczególniono zalety każdego z podejść.
Źródło:: Diagnostyka; 2012, 4(64); 39-44
1641-6414
2449-5220
Pojawia się w:: Diagnostyka
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Possibilities of supplying internal combustion engines by wood gas
Autorzy:: Piętak, A.
Duda, K.
Chraplewska, N.
Powiązania:: https://bibliotekanauki.pl/articles/247405.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: producer gas
wood gas
combustion
biomass gasification
environmental protection
Opis:: The article presents possibilities of implementation gas, came by wood biomass gasification, to run on internal combustion engines powered normally by Diesel fuel. Carbonization, gasification and burning effects were introduced. Main processes occurring during biomass gasification were shown. Basic chemical reactions characteristic to each stage were named. The differences in composition of received gas according to sort of biomass, gasification medium and type of generator were mentioned. In article were depicted way of modus operandi and structures of typical generators along with its advantages and disadvantages. gas properties obtained by this method and its main parameters were presented. The advantages and disadvantages posed by the use of wood gas in internal combustion engines were described. Parameters of the gas that should be amended to allow the engine to be powered were listed. Also were shown ways of changing these parameters. Necessary engine modifications to be able to supply it with wood gas were presented. The article finishes with conclusions and risks resulting from the use of this technology and also possible impact on the environment.
Źródło:: Journal of KONES; 2010, 17, 3; 369-376
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Examining the quality of custom productions biofuels
Autorzy:: Piętak, A.
Chraplewska, N.
Duda, K.
Powiązania:: https://bibliotekanauki.pl/articles/247665.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: biofuels
examinations and quality standards
custom production
Opis:: In relation to the scantiness of stores and the constantly increasing demand for energy, societies are forced to seek alternative energy sources. Biofuels that is fuels produced of biomass are one of them. The most important biofuels are bioethanol (produced from sugar cultivations and cereal crops, used with petrol) and biodiesel (ester produced mainly of vegetable oils; serves as the substitute or the addition to diesel). The esters of vegetable oils production requires using appropriate apparatus which enables to produce esters with parameters defined in very exacting legal norms about the quality of such fuel. In the paper were described results examining the quality of esters and mineral oils made with the use highly specialist, new generation 's apparatus which fulfll the conditions defining in the relevant norm. Results of those surveys are showing that using simple methods in production such biofuel doesn 't let for getting the product with parameters defined by the law. Applying fuel with lowered standard parameters influences on observed cases of improper functioning of fuel apparatus in engines with self-ignition, mainly in case of high pressure systems (e.g. Common Rail).
Źródło:: Journal of KONES; 2010, 17, 4; 391-398
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Influence of contribution of biofuels derived from renewable materials in the fuel on the combustion process and toxic compounds emission of compression ignition engine
Autorzy:: Mikulski, M.
Duda, K.
Piętak, A.
Wierzbicki, S.
Powiązania:: https://bibliotekanauki.pl/articles/242841.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: engine
fuel
oil
lubrication
exhaust emission
ecology
Opis:: The use of liquid fuels as an energy source for internal combustion engines is unavoidable nowadays, further consumption increases with the development of industry and economic growth of the country. The abundance of the world in fossil fuels is a highly controversial issue; however, irrespective of forecasts concerning deposits of mineral fuels, undisputable fact is that these are resources, which will deplete. Economic, environmental and legislative issues also impose a limitation of use of fossil fuels. Under the problems associated with fossil fuels, an interesting alternative may be fuel derived from renewable sources. Biodiesel understood as a renewable energy source, used to feed compression ignition engines seem to be the ideal solution to meet energy needs, facing so called economic circulation era. Many research results confirm that combustion of pure biofuels in the currently highly advanced injection systems causes many problems. Different biofuel properties from diesel, such as viscosity or density directly influences on combustion process and emission of toxic components in the exhaust gases. Therefore, biodiesel blends with diesel fuel in all proportions; the combustion of such mixtures carries a number of benefits, from consumption reduction of non-renewable resources to reduction of harmful components in the exhaust gases. In this paper, the effect of doping methyl esters on the process of combustion and exhaust gases emissions in a compression ignition engine feed with mixtures of esters and diesel was examined. Tests were performed on four-cylinder, CI Andoria ACDR engine equipped with Common Rail fuel injection system. In order to investigate the combustion process, cylinder pressure and toxic components in exhaust gases steady state measurements were performed.
Źródło:: Journal of KONES; 2014, 21, 4; 343-351
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: A proposal of simulation model of a wind-steering system for sailing yachts, based on single-stage servopendulum coupled with main rudder
Autorzy:: Piętak, A.
Mikulski, M.
Melzacki, M.
Czerwiński, K.
Powiązania:: https://bibliotekanauki.pl/articles/259625.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: sailing yachts
wind-steering system
automation
Opis:: The aim of this study was to investigate possible application of fast design prototyping methods for wind-steering systems used in offshore sailing yachts. The development of such methods would help to speed up the construction work and reduce the scope of necessary experimental research, prior to implementation of the system. In the present work, based on an analysis of existing designs of windvane systems, a preliminary selection of the system configuration has been undertaken, in terms of a compromise between efficiency, performance, and design complexity. Construction design of a single- stage, servo – pendulum system, has been developed by using the Autodesk Inventor design package. Next, based on the design data, a simulation model of the system, has been produced by using Matlab – Simulink software and SimMechanics library. The model was further verified in terms of kinematics mapping with the use of Matlab visualization tools.
Źródło:: Polish Maritime Research; 2015, 2; 15-22
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: The properties of mixtures of FAEE diesel and ethanol used to power compression ignition engines
Autorzy:: Piętak, A.
Duda, K.
Chraplewska, N.
Ambrosewicz, M.
Struś, M.
Powiązania:: https://bibliotekanauki.pl/articles/245969.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: biodiesel
combustion engines
air pollution
biofuels examination
biofuel mixtures
ethyl esters
Opis:: Due to the continuous increase in prices of conventional fuels, the production of biofuels on an industrial, as well as small scale, nowadays is becoming more economically efficient. However, the usage of biofuels in its pure form is a problem when one have to supply them with modern injection systems. Due to the difference in parameters of biofuels in comparison with conventional fuels, the attempt to develop a mixture of optimal parameters for use in diesel engines, equipped with modern injection system, was made. Fuels derived from substrates which are produced independently of food production and which can energize CI engines are occupying now stronger market positions. Easier access to know-how and an uncomplicated production process result in technological development, not only in mass-scale plants but also in smaller devices which meet the needs of individual users or in which residues of other processes are neutralized or reused13 samples were tested, mixed of diesel, FAEE and ethyl alcohol. The mixtures were prepared and tested in The Department of Mechatronics in University of Warmia and Mazury for the most important parameters in the evaluation of possibility of usage to power modern compression ignition engines.
Źródło:: Journal of KONES; 2013, 20, 4; 341-347
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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