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Wyświetlanie 1-10 z 10
Tytuł:
Effects of Low- and High-Frequency Side Bands of Notched Noise on Masking and Auditory Filter Shape at Very High Frequencies
Autorzy:
Kordus, M.
Kowalewski, B.
Powiązania:
https://bibliotekanauki.pl/articles/177387.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
auditory filters
notched noise
Patterson’s method
masking
Opis:
This paper is concerned with the determination of the auditory filter shape using the notched noise method with noise bands symmetrically located above and below a probe frequency of 10 kHz. Unlike in the classical experiments conducted with the use of Patterson method the levels as well as power spectrum densities of the lower and upper component bands of the notched noise masker were not the same and were set such as to produce the same amount of masking at the 10-kHz frequency. The experiment consisted of three conditions in which the following values were determined: (I) the detection threshold for a 10-kHz probe tone in the presence of a noise masker presented below the tone’s frequency; (II) the level of a noise masker presented above the 10-kHz probe tone frequency, at which the masker just masked the probe tone, (III) the detection threshold for a probe tone in the presence of a notched-noise masker. The data show a considerable amount of variability across the subjects, however, the resulting frequency characteristics of the auditory filters are consistent with those presented in the literature so that the Equivalent Rectangular Bandwidth is less than 11% of their centre frequency.
Źródło:
Archives of Acoustics; 2015, 40, 3; 329-336
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interoperability of Intelligent Transport Systems
Autorzy:
Kowalewski, M.
Kowalczyk, B.
Chojnacki, B.
Parapura, H.
Powiązania:
https://bibliotekanauki.pl/articles/393373.pdf
Data publikacji:
2012
Wydawca:
Polskie Stowarzyszenie Telematyki Transportu
Tematy:
inteligentne systemy transportowe
prawo telekomunikacyjne
intelligent transportation systems
telecommunication law
Opis:
This paper presents selected problems of Intelligent Transport Systems (ITS) interoperability. Their nature is related to the determination of interoperability, communication aspects in functional areas – ITS subsystems and to European and national interoperability frameworks..
Źródło:
Archives of Transport System Telematics; 2012, 5, 2; 37-40
1899-8208
Pojawia się w:
Archives of Transport System Telematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
National ITS architecture objectives
Autorzy:
Chojnacki, B.
Kowalewski, M.
Pękalski, A.
Powiązania:
https://bibliotekanauki.pl/articles/393579.pdf
Data publikacji:
2014
Wydawca:
Polskie Stowarzyszenie Telematyki Transportu
Tematy:
intelligent transport system (ITS)
ITS
C-ITS
architecture
Polska
inteligentny system transportu
architektura
Polska
Opis:
Architecture of Intelligent Transport Systems (ITS) is a set of general statements which let to plan unified implementation of applications and services, cooperating with each other. Due to formal and practical requirements it should be architecture fulfilling domestic conditions, including public language. The collected knowledge, experience and studies, particularly connected with European Frame ITS architecture, can be a useful start point both to drawing up Polish domestic ITS architecture, as well as to adopting institutional arrangements, allowing for her effective applications and wide approval.
Źródło:
Archives of Transport System Telematics; 2014, 7, 1; 25-30
1899-8208
Pojawia się w:
Archives of Transport System Telematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intelligent transport systems (ITS) interoperability assurance drivers
Autorzy:
Chojnacki, B.
Kowalewski, M.
Pękalski, A.
Powiązania:
https://bibliotekanauki.pl/articles/393764.pdf
Data publikacji:
2014
Wydawca:
Polskie Stowarzyszenie Telematyki Transportu
Tematy:
intelligent transport system (ITS)
ITS
C-ITS
interoperability
testing
inteligentny system transportowy
interoperacyjność
testowanie
Opis:
Interoperability is one of crucial problems in transport systems and it is touching especially the systems, when their complexity is growing with application of information and communications techniques. Directive of 2010/40/ EU on frameworks of the implementation of intelligent transport systems in the area of the road transport and interfaces with other types of transport has established measures to ensure ITS conformance, interoperability and continuity. Here there is review of the drivers to ITS interoperability achievement, as well as processes of their practical application. Special focus is on testing of the implementation of standards and the specifications.
Źródło:
Archives of Transport System Telematics; 2014, 7, 1; 19-24
1899-8208
Pojawia się w:
Archives of Transport System Telematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ecohydrodynamic model of the Baltic Sea. Part 1. Description of the ProDeMo model
Autorzy:
Oldakowski, B.
Kowalewski, M.
Jedrasik, J.
Szymelfenig, M.
Powiązania:
https://bibliotekanauki.pl/articles/49157.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
hydrodynamic-ecological model
nutrient
ecohydrodynamic modelling
biogeochemical process
subregion
ProDeMo model
Baltic ecosystem
Baltic Sea
Gdansk Gulf
Opis:
The ProDeMo (Production and Destruction of Organic Matter Model), a 3D coupled hydrodynamic-ecological model, was formulated and applied to the whole Baltic Sea and the subregion of the Gulf of Gdańsk. It describes nutrient cycles (phosphorus, nitrogen, silicon) through the food web with 15 state variables, oxygen conditions and the parameterisation of water-sediment interactions. The present version of the model takes two groups of phytoplankton – diatoms and non-diatoms – as well as zooplankton into consideration. It covers the flow of matter and energy in the sea, including river discharges and atmospheric deposition. Numerical applications are embedded on a 1 NMgri d for the Gulf of Gdańsk and a 5 NMgri d for the Baltic Sea. Since the model results largely concur with observations, the model can be regarded as a reliable tool for analysing the behaviour of the Baltic ecosystem. Some examples of the spatial-temporal variability of the most important biological and chemical parameters are presented. The model results are compared with those of other modelling research in the Baltic Sea. Both the ProDeMo model algorithm and its computing procedures need to be further developed. The next version should therefore enable more phytoplankton groups to be defined, for example cyanobacteria, which are able to take up molecular nitrogen from the atmosphere (nitrogen fixation). Additionally, the sediment phase should be divided into active and non-active layers.
Źródło:
Oceanologia; 2005, 47, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of mechanical properties of P91 steel by means of magnetic Barkhausen emission
Autorzy:
Makowska, K.
Kowalewski, Z. L.
Augustyniak, B.
Piotrowski, L.
Powiązania:
https://bibliotekanauki.pl/articles/949227.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
mechanical properties
magnetic Barkhausen effect
plastic strain
Opis:
In this work, an attempt at determination of mechanical properties by means of a method based on magnetic Barkhausen emission measurements was proposed. The specimens made of P91 steel were subjected to creep or plastic flow which were interrupted after a range of selected time periods in order to achieve specimens with an increasing level of strain. Subsequently, measurements of magnetic Barkhausen emission were carried out, and then static tensile tests were performed in order to check variations of basic mechanical parameters. It is shown that evident relationships between the yield point/ultimate tensile strength and some parameters of the Barkhausen emission exist.
Źródło:
Journal of Theoretical and Applied Mechanics; 2014, 52, 1; 181-188
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The preliminary investigation on the use of impregnating formulations with organosilanes and glycerides in the wood treatment. Part II:IR analysis
Wstępne badania nad wykorzystaniem organosilanowo-glicerydowych preparatów do impregnacji drewna. Część II:analiza FTIR
Autorzy:
Wozniak, M.
Kowalewski, P.
Ratajczak, I.
Pierdoch, W.
Mazela, B.
Szentner, K.
Powiązania:
https://bibliotekanauki.pl/articles/7448.pdf
Data publikacji:
2013
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2013, 84
1898-5912
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The preliminary investigation on the use of impregnating formulations with organosilanes and glycerides in the wood treatment. Part I:AAS analysis and micrfungi test
Wstępne badania nad wykorzystaniem organosilanowo-glicerydowych preparatów do impregnacji drewna. Część I:analizy AAS i testy biologiczne
Autorzy:
Pierdoch, W.
Wozniak, M.
Kowalewski, P.
Ratajczak, I.
Mazela, B.
Rissmann, I.
Powiązania:
https://bibliotekanauki.pl/articles/8942.pdf
Data publikacji:
2013
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2013, 84
1898-5912
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SatBałtyk – A Baltic environmental satellite remote sensing system – an ongoing project in Poland. Part 1: Assumptions, scope and operating range
Autorzy:
Wozniak, B.
Bradtke, K.
Darecki, M.
Dera, J.
Dudzinska-Nowak, J.
Dzierzbicka-Glowacka, L.
Ficek, D.
Furmanczyk, K.
Kowalewski, M.
Krezel, A.
Majchrowski, R.
Ostrowska, M.
Paszkuta, M.
Ston-Egiert, J.
Stramska, M.
Zapadka, T.
Powiązania:
https://bibliotekanauki.pl/articles/48960.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
algal bloom
Baltic ecosystem
Baltic Sea
Baltic water
chlorophyll a
functional property
marine optics
organic matter
phytoplankton pigment
Polska
remote sensing
SatBaltyk project
satellite monitoring
solar radiation
structural property
Opis:
This article is the first of two papers on the remote sensing methods of monitoring the Baltic ecosystem, developed by a Polish team. The main aim of the five- year SatBałtyk (2010–2014) research project (Satellite Monitoring of the Baltic Sea Environment) is to prepare the technical infrastructure and set in motion operational procedures for the satellite monitoring of the Baltic environment. This system is to characterize on a routine basis the structural and functional properties of this sea on the basis of data supplied by the relevant satellites. The characterization and large-scale dissemination of the following properties of the Baltic is anticipated: the solar radiation influx to the sea’s waters in various spectral intervals, energy balances of the short- and long-wave radiation at the Baltic Sea surface and in the upper layers of the atmosphere over the Baltic, sea surface temperature distribution, dynamic states of the water surface, concentrations of chlorophyll a and other phytoplankton pigments in the Baltic water, distributions of algal blooms, the occurrence of upwelling events, and the characteristics of primary organic matter production and photosynthetically released oxygen in the water. It is also intended to develop and, where feasible, to implement satellite techniques for detecting slicks of petroleum derivatives and other compounds, evaluating the state of the sea’s ice cover, and forecasting the hazards from current and future storms and providing evidence of their effects in the Baltic coastal zone. The ultimate objective of the project is to implement an operational system for the routine determination and dissemination on the Internet of the above-mentioned features of the Baltic in the form of distribution maps as well as plots, tables and descriptions characterizing the state of the various elements of the Baltic environment. The main sources of input data for this system will be the results of systematic recording by environmental satellites and also special-purpose ones such as TIROS N/NOAA, MSG (currently Meteosat 9), EOS/AQUA and ENVISAT. The final effects of the SatBałtyk project are to be achieved by the end of 2014, i.e. during a period of 60 months. These two papers present the results obtained during the first 15 months of the project. Part 1 of this series of articles contains the assumptions, objectives and a description of the most important stages in the history of our research, which constitute the foundation of the current project. It also discusses the way in which SatBałtyk functions and the scheme of its overall operations system. The second article (Part 2), will discuss some aspects of its practical applicability in the satellite monitoring of the Baltic ecosystem (see Woźniak et al. (2011) in this issue).
Źródło:
Oceanologia; 2011, 53, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SatBaltyk – A Baltic environmental satellite remote sensing system – an ongoing project in Poland. Part 2: Practical applicability and preliminary results
Autorzy:
Wozniak, B.
Bradtke, K.
Darecki, M.
Dera, J.
Dudzinska-Nowak, J.
Dzierzbicka-Glowacka, L.
Ficek, D.
Furmanczyk, K.
Kowalewski, M.
Krezel, A.
Majchrowski, R.
Ostrowska, M.
Paszkuta, M.
Ston-Egiert, J.
Stramska, M.
Zapadka, T.
Powiązania:
https://bibliotekanauki.pl/articles/48019.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Baltic ecosystem
Baltic Sea
energy influx
irradiance condition
marine optics
photosynthesis
plant community
Polska
practical application
preliminary result
radiation balance
remote sensing
SatBaltyk project
satellite monitoring
sea surface
solar energy
Opis:
This paper is the second part of the description of the first stage of the SatBałtyk project’s implementation. Part 1 (Woźniak et al. 2011, in this issue) presents the assumptions and objectives of SatBałtyk and describes the most important stages in the history of our research, which is the foundation of this project. It also discusses the operation and general structure of the SatBałtyk system. Part 2 addresses various aspects of the practical applicability of the SatBałtyk Operational System to Baltic ecosystem monitoring. Examples are given of the Baltic’s characteristics estimated using the preliminary versions of the algorithms in this Operational System. At the current stage of research, these algorithms apply mainly to the characteristics of the solar energy influx and the distribution of this energy among the various processes taking place in the atmosphere-sea system, and also to the radiation balance of the sea surface, the irradiance conditions for photosynthesis and the condition of plant communities in the water, sea surface temperature distributions and some other marine phenomena correlated with this temperature. Monitoring results obtained with these preliminary algorithms are exemplified in the form of distribution maps of selected abiotic parameters of the Baltic, as well as structural and functional characteristics of this ecosystem governed by these parameters in the Baltic’s many basins. The maps cover practically the whole area of the Baltic Sea. Also given are results of preliminary inspections of the accuracy of the magnitudes shown on the maps. In actual fact, the errors of these estimates are relatively small. The further practical application of this set of algorithms (to be gradually made more specific) is therefore entirely justified as the basis of the SatBałtyk system for the effective operational monitoring of the state and functioning of Baltic ecosystems. This article also outlines the plans for extending SatBałtyk to include the recording of the effects and hazards caused by current and expected storm events in the Polish coastal zone.
Źródło:
Oceanologia; 2011, 53, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-10 z 10

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