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Wyświetlanie 1-10 z 38
Tytuł:
Application of the Golden Numerical Rings for Configure Acoustic Systems of Fine Resolution
Autorzy:
Riznyk, W.
Powiązania:
https://bibliotekanauki.pl/articles/1504425.pdf
Data publikacji:
2011-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.28.Js
Opis:
The paper presents a new mathematical principle for improving the quality indices of acoustic systems with non-uniform structure (e.g. overlapping masks utilizing the entire ultra-acoustic aperture) with respect to the wavelength scale, where each pair of holes serves as an interferometer selecting the signal component at a spatial frequency, using novel design based on the combinatorial sequencing theory, namely the concept of golden numerical rings. The concept can be used for finding optimal placement of structural elements in spatially distributed systems, for example, positioning of holes elements in sonar antenna array. Golden numerical rings are cyclic sequences of positive integers which form perfect partitions of a finite interval [1, S] of integers. The sums of connected sub-sequences of a GRB enumerate the set of integer [1, S] exactly R-times. These design techniques make it possible to configure non-redundant masks in order to avoid interference of signal components of the same spatial frequency because phases of the components are unknown.
Źródło:
Acta Physica Polonica A; 2011, 119, 6A; 1046-1049
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Location of Processor Allocator and Job Scheduler and Its Impact on CMP Performance
Autorzy:
Zydek, D.
Chma, G.
Shawky, A.
Selvaraj, H.
Powiązania:
https://bibliotekanauki.pl/articles/227230.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
CMP
PA
JS
energy
assignment
Opis:
High Performance Computing (HPC) architectures are being developed continually with an aim of achieving exascale capability by 2020. Processors that are being developed and used as nodes in HPC systems are Chip Multiprocessors (CMPs) with a number of cores. In this paper, we continue our effort towards a better processor allocation process. The Processor Allocator (PA) and Job Scheduler (JS) proposed and implemented in our previous works are explored in the context of its best location on the chip. We propose a system, where all locations on a chip can be analyzed, considering energy used by Network-on-Chip (NoC), PA and JS, and processing elements. We present energy models for the researched CMP components, mathematical model of the system, and experimentation system. Based on experimental results, proper placement of PA and JS on a chip can provide up to 45% NoC energy savings.
Źródło:
International Journal of Electronics and Telecommunications; 2012, 58, 1; 9-14
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Velké svatohorské varhany ‒ ideální nástroj pro interpretaci hudby J. S. Bacha v českých zemích
The great Svatá Hora organ – the ideal instrument for interpreting the music of J.S. Bach in the Czech Republic
Autorzy:
Tůma, Jaroslav
Powiązania:
https://bibliotekanauki.pl/articles/570457.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Opolski. Diecezjalny Instytut Muzyki Kościelnej. Katedra Muzykologii Uniwersytetu Opolskiego
Tematy:
Svatá Hora
J.S. Bach skladatel
interpretace
J.S. Bach composer
interpretation
Opis:
Vladimír Šlajch’s organ at Svatá Hora in Příbram draws to a close an important stage of his life. Having had equal success building other organs, the most important and largest of which is in the German town Bruchsal, this instrument represents a unique achievement. These days we usually encounter organs that conform to the wishes of organists and organ experts that every new instrument be built primarily with the convenience of the performer in mind. The organ at the Basilica of Our Lady of Svatá Hora is different. Instead, it embodies a synthesis of original solutions and tried-and-true traditions. Vladimír Šlajch built it as a sort of tribute to the organ builders who once worked in Bohemia. The decorating of the prospect pipes makes reference to Abraham Starck from Loket, Ondřej Kokštejn from Příbram, and the organ builder Bedřich Semrád from the Central Povltaví Region. The tracker action for the manuals and registration is mechanical. Because of this tracker action constructed strictly in accordance with Baroque models, the organ makes an audible clicking sound when played, and in addition, because of differing distances for individual connections, the clicking is not equally loud for each note. The clicking bothers many organists, but the organ builder insists that the design is justified, using centuries of organ building tradition as his argument. In my opinion, playing the great Svatá Hora organ successfully depends upon approaching it with a great deal of humility and upon the ability to adapt oneself to the instrument, along with having a deep understanding of the features specific to the organ. It is true that the level of disruptive clacking noise reveals the organist’s particular style of playing, but it is also true that the attempt to make less noise forces each of us not only to depress, but also to release the keys as carefully as possible, and with this kind of tracker action, moving one’s fingers in this way naturally also influences the sound of legato passages and the smoothness of the phrasing. While the attempt to play without making noise is entirely futile, especially when using quieter registration, it has an absolutely fundamental influence over the quality of the melodic lines within the context of the polyphony, and that influence is clearly for the better. From the layout of the instrument, we clearly see the wealth of sonic possibilities at our disposal. The many colours of the registers can be combined into an almost inexhaustible quantity of shadings. While the organ is intended for playing older music, mainly of the Renaissance, Baroque, and Classical eras, neither Romantic nor contemporary compositions are out of the question. One must simply consider which ones to choose and which ones would be less appropriate, because although the tuning is set at a' = 440 Hz at 18 degrees Celsius, the temperament is slightly unequal, reminiscent of Valotti tuning. The spatial layout of the individual divisions of the Svatá Hora is quite unusual, but it still respects longstanding tradition. The manuals have a chromatic range from C to f'''. The Great division (manual II) takes up the two most spacious parts of the organ case. It is divided into a C and C sharp side. A smaller division called the Positiv, placed in front above the organist’s head, is connected to a third manual. The first manual plays the Unterwerk or Choir division, which is divided into bass and discant. Each register of the Unterwerk is activated separately for the bass and discant on the left and right sides of the console. The organ builder placed the Unterwerk right behind the console in the pedestal of the organ. Like the Great division, the Pedal is divided into a C and C sharp side, and each takes one of the adjacent loft areas on the sides. On the other hand, a three-rank pedal Cornet plays from the Crown Positiv or Kronwerk located at the top just under the vault. Representing a peculiar feature are the two sets of chimes (Zimbelstern), which are located on the pedal cases on opposite sides. A noteworthy property of the organ at Svatá Hora is its sonic versatility, perhaps even universality to a certain extent. If you listen to it, you soon get the impression that you are hearing a Czech or south-German Baroque sound, then it suddenly seems that you have found yourself listening to a Silberman organ in nearby Saxony, until finally you notice a passage that seems to come from the Baltic, with sounds of the ideal organ of Bach’s forerunners of the north-German school. Then the combination of the Principal on the Great manual and the Bifara stop tuned to create vibrato makes us wonder, might we perhaps be in Italy? And at the same time, although the organ is in a Catholic church, the instrument seems to the organist to be in perfect accord with the music of Johann Sebastian Bach. The acoustics and reverberation here are exceedingly suited to the spirit of Bach’s Protestantism. The Svatá Hora organ is indispensable for the successful interpretation of Bach’s music within the context of this region. Notwithstanding all of their beauty, the Baroque organs of Bohemia have a small range of tones, with a lack of the needed keys, pedals, and registers, while the later organs are oriented towards the Romantic musical style, and even newer organs usually suffer from insufficient artistic quality caused mainly by mass production methods. By contrast, the new Svatá Hora organ is of great artistic worth; it even fits the basilica perfectly from a visual perspective. Once the organ was finished, we could hardly imagine that not long beforehand the instrument had not yet been installed. These days, an organ is very rarely so perfectly matched to the place for which it is intended.
Źródło:
Folia Organologica. International yearbook of organ and organ music; 2019, 2; 93-101
2657-6082
2719-3284
Pojawia się w:
Folia Organologica. International yearbook of organ and organ music
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Opracowanie i testowanie aplikacji utworzonych z użyciem platform Node.js oraz Laravel
Development and testing of applications created with the platforms Node.js and Laravel
Autorzy:
Bomba, V
Łukasik, E.
Powiązania:
https://bibliotekanauki.pl/articles/98032.pdf
Data publikacji:
2016
Wydawca:
Politechnika Lubelska. Instytut Informatyki
Tematy:
Node
js
Laravel
PHP
MongoDB
benchmark
Opis:
Celem pracy była analiza i badanie programowej platformy Node.js i frameworka Laravel, a także porównanie wydajności serwisów utworzonych za pomocą tych technologii. Testy wydajności aplikacji przeprowadzono za pomocą oprogramowania Apache Benchmark i Apache JMeter. Analiza obejmuje teoretyczne i praktyczne aspekty ich funkcjonowania.
The aim of this work was the analysis and research of software platform Node.js and the framework Laravel, and comparing the performance of the created sites using Node.js and PHP. The tests were carried out with Apache Benchmark and Apache JMeter. The analysis includes theoretical and practical aspects of their functioning.
Źródło:
Journal of Computer Sciences Institute; 2016, 2; 60-63
2544-0764
Pojawia się w:
Journal of Computer Sciences Institute
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porównanie wydajności narzędzi do tworzenia interfejsu aplikacji typu SPA na przykładzie React i Vue.js
Comparison of the performance of tools for creating a SPA application interface - React and Vue.js
Autorzy:
Boczkowski, Krzysztof
Pańczyk, Beata
Powiązania:
https://bibliotekanauki.pl/articles/98420.pdf
Data publikacji:
2020
Wydawca:
Politechnika Lubelska. Instytut Informatyki
Tematy:
React
Vue.js
wydajność
JavaScript
performance
Opis:
W artykule przeprowadzono analizę wydajności aktualnie stosowanych narzędzi do tworzenia interfejsu aplikacji typu SPA. Badanie przeprowadzono z wykorzystaniem dwóch aplikacji, o takiej samej funkcjonalności, zaimplementowanych w React i Vue.js. Do pomiaru wykorzystano narzędzia deweloperskie dostępne w przeglądarkach internetowych oraz odpowiednie implementacje własnych metod.
The article analyses the performance of currently used tools for creating a SPA application interface. The study was conducted using two applications with the same functionality, implemented in React and Vue.js. The tools available in web browsers and appropriate implementations of own methods were used to measure SPA performance.
Źródło:
Journal of Computer Sciences Institute; 2020, 14; 73-77
2544-0764
Pojawia się w:
Journal of Computer Sciences Institute
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza porównawcza szkieletów programistycznych Angular 10 i Vue 3.0
Comparative analysis of the Angular 10 and Vue 3.0 frameworks
Autorzy:
Lipski, Piotr
Kyć, Jarosław
Pańczyk, Beata
Powiązania:
https://bibliotekanauki.pl/articles/1837836.pdf
Data publikacji:
2021
Wydawca:
Politechnika Lubelska. Instytut Informatyki
Tematy:
Angular
Vue.js
efficiency
comparison
wydajność
porównanie
Opis:
Celem artykułu jest przeprowadzenie analizy porównawczej dwóch szkieletów programistycznych Angular w wersji 10 oraz Vue w wersji 3.0. Podstawą porównania jest wydajność zbadana za pomocą dwóch podobnych co do funkcjonalności aplikacji. Badaniu poddano widok ze zmienną liczbą wyświetlanych elementów, a czas mierzono od momentu wskazania liczby komponentów do zakończenia renderowania. Porównano także ilość przestrzeni dyskowej jaką zajmują finalne aplikacje oraz modułów aplikacji względem sposobu realizacji ich funkcjonalności. Wyniki badań pozwoliły sformułować wnioski, że Vue jest bardziej wydajny od Angulara a dodatkowo aplikacja Vue zajmuje mniej przestrzeni dyskowej.
The aim of this article is to perform a comparative analysis of the Angular v10 and Vue v3.0 frameworks. The basis of the comparison is the performance tested with two applications that are similar in terms of functionality. The view with a variable number of displayed elements was examined, and the time was measured from the moment the number of components was indicated to the end of rendering. The amount of disk space occupied by the final applications and application segments was also compared in relation to the method of implementing their functionality. The results of the research allowed to formulate the conclusions that Vue is more efficient than Angular and additionally the Vue application takes up less disk space.
Źródło:
Journal of Computer Sciences Institute; 2021, 20; 205-209
2544-0764
Pojawia się w:
Journal of Computer Sciences Institute
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics of Acoustic Emission Signals Generated by the Contacts of the Selector
Autorzy:
Cichoń, A.
Borucki, S.
Wotzka, D.
Szmajda, M.
Powiązania:
https://bibliotekanauki.pl/articles/1417945.pdf
Data publikacji:
2012-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
52.80.-s
43.28.Js
Opis:
An important part of electric power transformer is the on load tap changer which enables for voltage regulation in the network. Due to high level of failure frequency of these devices it is necessary to look for new diagnostic methods which enable for theirs technical state estimation under transformer normal operating condition. Presently at the Electric Power Institute at Opole University of Technology there are works in progress aspiring to determine the application possibility of the acoustic emission method for on load tap changer diagnosis. Results of scientifically-research works aiming to characterize the acoustic emission signals generated by a separated selector are presented in the paper. Measurements have been performed in a setup with a model of on load tap changer type VEL-110-27 from ELIN. Acoustic emission signals generated by the selector have been analyzed in detail. Analysis of the time-frequency components of signals generated by on load tap changer has been carried out with the short time Fourier transform and continuous wavelet transform. Based on the comparison outcome of acoustic emission signals generated by the power changer and by the selector two measuring paths endowed with wide band contact transducers have been proposed for the practical application.
Źródło:
Acta Physica Polonica A; 2012, 122, 5; 804-807
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristic of Acoustic Signals Generated by Operation of On Load Tap Changers
Autorzy:
Cichon, A.
Fracz, P.
Zmarzly, D.
Powiązania:
https://bibliotekanauki.pl/articles/1493036.pdf
Data publikacji:
2011-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
52.80.-s
43.28.Js
Opis:
Possibilities of application of the acoustic method for the on load tab changers diagnosis has been presented in the paper. The analysis of measurement results gathered during research works performed under laboratory conditions has been presented in detail. The registered acoustic signals have been analyzed in time and time-frequency domains. The time domain analysis has been performed by presentation of time runs and their envelopes determined by use of the Hilbert transform. Evaluation of the time-frequency components has been performed by use of the short-time Fourier transform, the discrete and the continuous wavelet transforms.
Źródło:
Acta Physica Polonica A; 2011, 120, 4; 585-588
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Application of the Selected Time-Frequency Descriptors Detection of the Acoustic Emission Signals Generated by Multisource Partial Discharges
Autorzy:
Cichon, A.
Powiązania:
https://bibliotekanauki.pl/articles/1795791.pdf
Data publikacji:
2009-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
52.80.-s
43.28.Js
Opis:
The paper presents the comparative analysis results of the acoustic emission signals generated by various forms of partial discharges occurring in multisource systems. Modern methods of the signal digital processing: a short-time Fourier transform and continuous and discrete wavelet transforms were applied for the assessment of the results in the time-frequency domain. The acoustic emission signals generated by partial discharges were registered with a WD AH17 contact transducer by the Physical Acoustics Corporation placed on the external part of the tub.
Źródło:
Acta Physica Polonica A; 2009, 116, 3; 290-293
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Acoustic Wave Propagation in a Power Transformer Model
Autorzy:
Wotzka, D.
Boczar, T.
Zmarzły, D.
Powiązania:
https://bibliotekanauki.pl/articles/1807760.pdf
Data publikacji:
2009-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
52.80.-s
43.28.Js
Opis:
Analyses of acoustic wave propagation in a model power transformer are presented in the paper. The acoustic wave is induced by partial discharges that are simulated at predefined coordinates in the core and winding. Propagation of the numerical calculated acoustic wave is analyzed within the transient state. Achieved results indicate that the space and time distributions of the acoustic pressure depend on the induction position. Furthermore, a greater pressure gradient is observed in domains with higher speed of sound while the largest amplitude occurs at the vicinity of the induction position.
Źródło:
Acta Physica Polonica A; 2009, 116, 3; 428-431
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 38

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