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Wyświetlanie 1-15 z 21
Tytuł:
Approaches to Evaluating the Quality of Masking Noise Interference
Autorzy:
Smailov, Nurzhigit
Batyrgaliev, Askhat
Akhmediyarova, Ainur
Seilova, Nurgul
Koshkinbayeva, Madina
Baigulbayeva, Moldir
Romaniuk, Ryszard
Orunbekov, Maxat
Assem, Kabdoldina
Kotyra, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1844611.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
noise generators
masking noises
TEMPEST
noise rating
Opis:
The paper discusses the characteristics of spatial electromagnetic noise generators, as well as the formation of a broadband noise signal. A number of well-known methods for assessing the quality of masking noise interference and the approaches used in them have been described. Approaches to the measurement of masking noise were also determined in assessing their quality. In conclusion, additional methods are proposed for assessing the quality of masking noises, such as searching for correlation of noise in different frequency sub-bands and using statistical and (or) graphical methods (tests) for randomness.
Źródło:
International Journal of Electronics and Telecommunications; 2021, 67, 1; 59-64
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hałasy, które nas nawiedzają. Cisza, żałoba i dźwiękowe abiekty
Haunting Noises. Silence, Mourning and Sound Abjects
Autorzy:
Brzostek, Dariusz
Powiązania:
https://bibliotekanauki.pl/articles/1068821.pdf
Data publikacji:
2021-03-11
Wydawca:
Łódzkie Towarzystwo Naukowe
Tematy:
silence
noise
specter
abject
mourning
Opis:
This paper focuses on the problem of silence regarded as an acoustic framework in which uncanny sonic phenomena appear. Some of these haunting noises take the form of sound abject — an unwanted sound of the human body, „neither [sound] subject nor [sound] object”. Borrowing terms from two eminent authors of twentieth-century aesthetics — Julia Kristeva, who proposed the concept of abject, and Pierre Schaeffer, who announced the existence of acousmatic sound objects, I hereby take the liberty of introducing the idea of „sound abject” — an unwanted, uncanny corporeal sound (the sound of the body itself ), uncontrolled by the self and constituting neither a subject nor an object but a sound phantasm that separates from the body and resounds worrisomely. I analyse the cases of sound installation created by Jan Simon as well as the Jamaican dub music production strategies.
Źródło:
Zagadnienia Rodzajów Literackich; 2020, 63, 4; 13-26
0084-4446
Pojawia się w:
Zagadnienia Rodzajów Literackich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Posthumanistyczne echa, apokaliptyczne tony i zwierzęce odgłosy w filmach Bonga Joon-ho
Posthuman echoes, apocalyptic tones and animal noises in Bong Joon-ho’s films
Autorzy:
Loska, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1047443.pdf
Data publikacji:
2021-03-31
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
posthumanism
science fiction film
Bong Joon-ho
animal studies
biopolitics
apocalyptic narratives
ecological catastrophes
Opis:
The subject of the analysis in this article are three films by Bong Joon-ho: The Host (2006), Snowpiercer (2013) and Okja (2017), considered from the posthumanist perspective. A starting point is Donna Haraway’s suggestion that science-fiction stories should be treated as a tool for speculative thinking. Then, I point to the way the Korean film director demonstrates his critical reflection on the effects of climate change, deepening economic inequalities, the impact of global capitalism and the biopolitical model of the governance. The main aim is to seek out the possible strategies of resistance which enable humans to change their attitude to other species (Okja) and to ask a question about the scope of human freedom, the effects of our interference in the functioning of the biosphere (Snowpiercer) and the results of genetic modifications of animals.
Źródło:
Images. The International Journal of European Film, Performing Arts and Audiovisual Communication; 2020, 28, 37; 151-166
1731-450X
Pojawia się w:
Images. The International Journal of European Film, Performing Arts and Audiovisual Communication
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on noises influencing the accuracy of CNC machine straightness measurements methods based on beam position detection
Autorzy:
Budzyn, Grzegorz
Rzepka, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/100115.pdf
Data publikacji:
2020
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
laser interferometer
ISO230
machine geometry
fibre laser
straightness measurement
Opis:
Fast, easy and accurate measurement of geometry of numerically controlled machines has always been challenging. With the use of a laser interferometer, it can be precise but it is complex. On the other side, the use of granite reference blocks is fairly easy yet quite limited for many machine types and sizes. Nowadays the improvements in technology open a new way – the instruments based on the detection of laser beam spot position. Those instruments are accurate and easy to use yet, comparing to the laser interferometers and granite blocks, they are sensitive to parameters of a laser source and to changing environmental conditions. In the paper, we analyse experimentally the influence of the type and parameters of laser source on the accuracy of straightness measurements. The most commonly met in practical applications a free space and fibre based laser sources are studied and compared. The influence of environmental conditions on measurement accuracy is also shown. Finally, the conclusions about optimal methods of improving the accuracy of beam position detection methods are drawn.
Źródło:
Journal of Machine Engineering; 2020, 20, 3; 76-84
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The acoustic camera as a tool to identify belt conveyor noises
Autorzy:
Bortnowski, Piotr
Nowak-Szpak, Anna
Ozdoba, Maksymilian
Król, Robert
Powiązania:
https://bibliotekanauki.pl/articles/1839031.pdf
Data publikacji:
2020
Wydawca:
Główny Instytut Górnictwa
Tematy:
belt conveyor
noise sources
noise location
acoustic camera
przenośnik taśmowy
źródła hałasu
lokalizacja hałasu
kamera akustyczna
Opis:
This paper explores the possibilities of using an acoustic camera as a tool that allows the verification of the correct construction and operation of individual elements of a belt conveyor. Based on the simultaneously recorded components - a video camera and measuring microphones, the sound pressure level map of the belt conveyor was created. The tests were carried out in laboratory conditions and covered the location and identification of individual noise sources. The verification consists not only of searching for dominant sound sources, but above all, of searching for frequencies in the analysed spectrum that should not occur during their proper operation. The tests allow for the identification of frequencies and the determination of the sound pressure level for three noise sources: the electric motor noise, the idler roll bearing noise as well as the noise on the tail pulley caused by belt misalignment.
Źródło:
Journal of Sustainable Mining; 2020, 19, 4; 286-295
2300-1364
2300-3960
Pojawia się w:
Journal of Sustainable Mining
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Underwater Noises of Open-Circuit Scuba Diver
Autorzy:
Korenbaum, Vladimir
Kostiv, Anatoly
Gorovoy, Sergey
Dorozhko, Veniamin
Shiryaev, Anton
Powiązania:
https://bibliotekanauki.pl/articles/177264.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
underwater acoustics
diver
respiratory noises
noises of fins
open-circuit scuba
breathing apparatus
detection
monitoring
bearing
Opis:
The features of respiratory noises and noises of fins for open-circuit scuba divers, indicating a multipole character of noises emission, are specified in cameral conditions. It demonstrates a possibility to detect low-frequency components of noises of fins with pressure gradient sensor in near field. A possibility of estimating the respiratory rate of an open-circuit scuba diver is demonstrated at distances up to 100 m in real sea. It gives an opportunity of estimating the bearing (time delay in a pair of hydrophones) for the open-circuit scuba diver by respiratory noises at distances up to 150 m in real sea. Thus, low-frequency underwater noises of open-circuit scuba divers may be successfully applied to monitor the safety of diving and to prevent waterside intrusion by trespassers.
Źródło:
Archives of Acoustics; 2020, 45, 2; 349-357
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of wavelet – neural method to detect backlash zone in electromechanical systems generating noises
Autorzy:
Tomczyk, Marcin
Plichta, Anna
Mikulski, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/117667.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
induction motor
wavelet transformation
backlash zone
neural networks
silnik indukcyjny
transformacja falkowa
strefa luzu
sieci neuronowe
Opis:
This paper presents a method of identifying the width of backlash zone in an electromechanical system generating noises. The system load is a series of rectangular pulses of constant amplitude, generated at equal intervals. The need for identification of the backlash zone is associated with a gradual increase of its width during the drive operation. The study uses wavelet analysis of signals and analysis of neural network weights obtained from the processing without supervised learning. The time-frequency signal representations of accelerations of the mechanical load components were investigated.
Źródło:
Applied Computer Science; 2019, 15, 4; 93-108
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chroboty, echa, oho! Słuch i inne zmysły w poezji Mirona Białoszewskiego
Noises, echoes, oho! Hearing and other senses in Miron Białoszewski’s poetry
Autorzy:
Kopkiewicz, Aldona
Powiązania:
https://bibliotekanauki.pl/articles/1041758.pdf
Data publikacji:
2017-09-28
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
affect
trauma
senses
melancholy
poetry after 1945
modern poetry
postphenomenology
corporeal subjectivity
Opis:
The very relation between possibility of writing and sensitivity is a main concern of this interpretation of Miron Białoszewski’s poetry. At the start, I notice traumatic state of writing subjectivity, which I see as a negative affect. Białoszewski’s trauma manifests itself as an acedia in the Leżenia poetry cycle, in which the poet searches for another, positive affective simulation as well. He finds it in the very work of language, of sounds, and of material reality surrounding him. As he tries to revive himself and his writing mainly through the senses of touching and hearing/listening, I use the model of subjectivity described by Jean-Luc Nancy in the essay On listening,  to understand how creative, writing subjectivity works on sensual and language levels.
Źródło:
Poznańskie Studia Polonistyczne. Seria Literacka; 2017, 30; 259-275
1233-8680
2450-4947
Pojawia się w:
Poznańskie Studia Polonistyczne. Seria Literacka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
I love noises
Autorzy:
Wiedemann, Adam
Współwytwórcy:
Szejko, Jan
Kopeć, Aleksandra
Kozioł, Paweł
Choromańska, Paulina
Data publikacji:
2017-07-18
Wydawca:
Fundacja Nowoczesna Polska
Tematy:
Współczesność
Wiersz
Liryka
Opis:
Publikacja zrealizowana w ramach projektu Wolne Lektury (http://wolnelektury.pl). Reprodukcja cyfrowa wykonana przez fundację Nowoczesna Polska z egzemplarza pochodzącego ze zbiorów autora. Dofinansowano ze środków Ministra Kultury i Dziedzictwa Narodowego.
Źródło:
Adam Wiedemann, Samczyk, Obserwator, Poznań 1996.
Dostawca treści:
Wolne Lektury
Książka
Tytuł:
Le bruitage en tant que declencheur de la créativité et de la parole en classe de langue
Sound images as elements enhancing creativity and the speaking skill in a foreign language
Autorzy:
Gajos, Mieczysław
Powiązania:
https://bibliotekanauki.pl/articles/1050834.pdf
Data publikacji:
2014-01-01
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
sound images
noises
creativity
imagination
speaking skill
Opis:
To develop communicative competence in L2 does the learner need to have the knowledge of linguistic resources, but also of other factors shaping the situational context in which the act of communication is taking place. The elements bearing directly on effi ciency on information exchange comprise all kinds of noises and sound images which make up a signifi cant part of the broadly conceived communicative context. The present paper aims to raise the question of how the use of sound images in the process of foreign language learning/teaching should be made. Among other issues, it addresses the usefulness of various sounds and noises in stimulating learners’ imagination, creativity and skills, as well as in enhancing spoken output in L2.
Źródło:
Studia Romanica Posnaniensia; 2014, 41, 3; 33-45
0137-2475
2084-4158
Pojawia się w:
Studia Romanica Posnaniensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical simulation of tonal and broadband hydrodynamic noises of noncavitating underwater propeller
Autorzy:
Kheradmand, S.
Rahrovi, A.
Mousavi, B.
Powiązania:
https://bibliotekanauki.pl/articles/259022.pdf
Data publikacji:
2014
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
Numerical Simulation
tonal
broadband
Hydrodynamic Noise
Propeller
Opis:
The objective of the study was to carry out numerical simulation of the hydrodynamic noise generated by the flow around a non-cavitating underwater propeller. To achieve this goal, hydrodynamic simulation of flow around the propeller was initially done. The unsteady 3-D flow was modelled numerically along with the LES turbulence model. The hydrodynamic parameters calculated for different advance coefficients are visibly in line with the previous experimental works. The turbulent quantities of the hydrodynamic study and the FWH model were used to find spectral distributions of flow noise for different advance coefficients. The results of the acoustic investigation were compared against other numerical results. An array of 100 hydrophones was used to find the directional distribution of the noise around the propeller. The obtained results indicate that, for different advance coefficients, the highest intensity of the noise recorded by different receivers around the propeller occurs in BPF. Furthermore, it has been found that the noise is directionally as well as intensively distributed around the propeller. Noise distributions of noise are presented and discussed for different regimes of propeller rotation. The analysis of the expanded spectrum (broadband analysis) of noise on the propellers has also been done and the contribution of all parts of the propeller to hydrodynamic noise generation are presented.
Źródło:
Polish Maritime Research; 2014, 3; 46-53
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie zakłóceń quasistacjonarnych w celu redukcji nierównomierności przesuwu taśmy w nagraniach dźwięku na nośnikach magnetycznych
The use of quasi stationary noises for tape feed fluctuation reduction in magnetic media recordings
Autorzy:
Kardasz, P.
Powiązania:
https://bibliotekanauki.pl/articles/376703.pdf
Data publikacji:
2014
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
redukcja zakłóceń
analiza sygnału
zapis magnetyczny
Opis:
Stare nagrania dźwięku na taśmach magnetycznych charakteryzują się zakłóceniami spowodowanymi nierównomiernością przesuwu taśmy oraz jej mechanicznymi odkształceniami. W celu ich redukcji można wykorzystać zawsze obecne w takich nagraniach zakłócenia quasistacjonarne, takie jak przydźwięk sieciowy. Artykuł przedstawia algorytm, wykorzystujący wahania częstotliwości tych zakłóceń w celu oszacowania nierównomierności przesuwu taśmy i redukcji spowodowanych tym zniekształceń. Przy użyciu sygnału testowego zostało zbadane zachowanie się proponowanego algorytmu i jakość redukcji zakłóceń. Zostały również zarysowane kierunki dalszych badań nad udoskonaleniem i wykorzystaniem opracowanego algorytmu.
Old audio recordings on magnetic tape are characterized by distortions caused by its mechanical deformations and non-uniformity of the tape feed. In order to reduce these distortions the ever-present quasi stationary noise, such as 50 Hz hum, can be used. The article presents an algorithm that uses this noise fluctuation to estimate the non-uniformity of the tape feed and to reduce the distortions caused by that non-uniformity. The behavior of the proposed algorithm and the quality of non-uniformity tape feed distortions reduction was examined. The directions for further research and refinement of the developed algorithm were outlined.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2014, 80; 109-114
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fractional Kalman Filter algorithms for correlated system and measurement noises
Autorzy:
Sierociuk, D.
Powiązania:
https://bibliotekanauki.pl/articles/206137.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
fractional order calculus
discrete fractional state-space systems
fractional Kalman filter
Opis:
The paper presents a generalization of the Fractional Kalman Filter to a case when correlated system and measurement noises appear. The algorithm proposed is derived in detail for a linear generalized discrete fractional order state-space system for both constant and variable order cases. In order to present the efficiency of the proposed algorithm, results of numerical simulations are presented. Results of numerical experiments are compared with the effect of estimation obtained when using the traditional Fractional Kalman Filter algorithm.
Źródło:
Control and Cybernetics; 2013, 42, 2; 471-490
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Szumy podwodne małej jednostki
Underwater noise in a small vessel
Autorzy:
Dudziak, S.
Powiązania:
https://bibliotekanauki.pl/articles/223113.pdf
Data publikacji:
2013
Wydawca:
Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich
Tematy:
szumy morza
hydroakustyka
identyfikacja
sea noises
hydroacoustics
identification
Opis:
Artykuł przedstawia wyniki badań in situ przeprowadzone na akwenie Zatoki Gdańskiej w celu pomiaru i analizy szumów generowanych przez jednostkę morską. Otrzymane wyniki są wstępem do opracowania metod opisu dźwięków generowanych przez jednostki, a także fazy ich przejścia względem obiektu pomiarowego.
The paper presents the results of investigations carried out in the Bay of Gdańsk in order to measure and analyze noise generated by a maritime vessel. The results obtained are the initial stage in developing methods for describing sounds generated by vessels, as well as phases of their passage with regard to the object measured.
Źródło:
Zeszyty Naukowe Akademii Marynarki Wojennej; 2013, R. 54 nr 3 (194), 3 (194); 39-51
0860-889X
Pojawia się w:
Zeszyty Naukowe Akademii Marynarki Wojennej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spectra for the product of Gaussian noises
Autorzy:
Kish, L. B.
Mingesz, R.
Gingl, Z.
Granqvist, C.-G.
Powiązania:
https://bibliotekanauki.pl/articles/221180.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fluctuation-enhanced sensing
correlation detectors
indoor and environmental air quality sensing
Opis:
Products of Gaussian noises often emerge as the result of non-linear detection techniques or as parasitic effects, and their proper handling is important in many practical applications, including fluctuation-enhanced sensing, indoor air or environmental quality monitoring, etc. We use Rice's random phase oscillator formalism to calculate the power density spectra variance for the product of two Gaussian band-limited white noises with zero-mean and the same bandwidth W. The ensuing noise spectrum is found to decrease linearly from zero frequency to 2W, and it is zero for frequencies greater than 2W. Analogous calculations performed for the square of a single Gaussian noise confirm earlier results. The spectrum at non-zero frequencies, and the variance of the square of a noise, is amplified by a factor two as a consequence of correlation effects between frequency products. Our analytic results are corroborated by computer simulations.
Źródło:
Metrology and Measurement Systems; 2012, 19, 4; 653-658
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 21

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