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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
Tytuł:
Solvent-Dependent Quenching of the Lowest Excited Singlet State of 9,10-Dibromoanthracene by Ground-State 2,5-Dimethylhexa-2,4-Diene Yielding 9-Bromoanthracene or the [4+2] Adduct
Autorzy:
Nagahara, T.
Nakayama, T.
Hamanoue, K.
Powiązania:
https://bibliotekanauki.pl/articles/1992713.pdf
Data publikacji:
1998-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
82.40.Js
82.50.Fv
Opis:
Irrespective of the dielectric constant (ε) or the hydrogen-bonding ability of a pure solvent, the lowest excited singlet state (DBA*) of 9,10-dibromoanth racene (DBA) is quenched by ground-state 2,5-dimethylhexa-2,4-diene (DMHD) giving rise to the appearance of an exciplex emission. By means of sub-picosecond and nanosecond laser photolysis as well as steady-state photolysis, however, the following solvent-dependent results are obtained; (1) in acetonitrile (ε=37.5) and acetone (ε=20.7), an exciplex (DBA-DMHD)* formed between DBA* and DMHD generates the DBA radical anion (DBA$\text{}^{•-+}$) as an intermediate for formation of 9-bromoanthracene (BA) from DBA; (2) in ethanol (ε=24.6), 2-propanol (ε=19.9), 1-octanol (ε=10.3), diethyl ether (ε=4.34), and heptane (ε=1.92), a neutral radical species (NR$\text{}^{•}$) generated by decomposition of (DBA-DMHD)* (or by a reaction of DBA* with DMHD) is an intermediate for formation of a dibenzobicyclo[2.2.2]octadiene-type compound (a [4+2] adduct); (3) both DBA$\text{}^{•-}$ and NR$\text{}^{•}$ are generated in methanol (ε=32.7) but the rate (v) of BA formation upon steady-state photolysis of DBA in the presence of 1 M DMHD decreases in the order of v(acetonitrile, ε=37.5) > v(acetone, ε=20.7) > v(methanol, ε=32.7). It thus can be concluded that the mechanism of exciplex decomposition and the reaction of DBA* with DMHD are affected by not only the dielectric constant of a pure solvent but also its hydrogen-bonding ability.
Źródło:
Acta Physica Polonica A; 1998, 94, 4; 701-713
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Resonant Phonons in Adsorbates
Autorzy:
Dobrzynski, L.
Djafari Rouhani, B.
Zieliński, P.
Akjouj, A.
Sylla, B.
Oumghar, E.
Powiązania:
https://bibliotekanauki.pl/articles/1943987.pdf
Data publikacji:
1996-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.35.JS
68.45.-v
Opis:
After a brief review on surface phonons, we focus on resonant phonons in adsorbed thin layers. Such resonances may in general be understood within the substrate bulk band as thin layer modes shiften and broaden by the interaction with the substrate phonons. These resonant phonons appear as well-defined peaks in the phonon density of states. Their experimental study started recently by Helium atom scattering spectroscopy. This review will end by a prospective revue done mostly after the presentation of two unpublished results. First the slab resonant phonons may almost be confined in the surface slab even for frequencies falling within the bulk phonon band, if the surface slab is separated from the substrate by a buffer layer. The other prospective unpublished result deals with a model system in which the propagating phonons reach a space point from which they can continue to propagate through two different finite in space channels before reaching again a homogeneous uniform path. Such a system exhibits some frequencies for which the transmission factor vanishes. This phenomenon is related to the resonances associated with the finite additional path offered to the propagation of the phonons.
Źródło:
Acta Physica Polonica A; 1996, 89, 2; 139-144
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie Node.js w tworzeniu aplikacjach sterowanych zdarzeniami
Using of Node.js in creating application based on event-driven architecture
Autorzy:
Hrynczyszyn, W.
Plechawska-Wójcik, M.
Powiązania:
https://bibliotekanauki.pl/articles/98122.pdf
Data publikacji:
2017
Wydawca:
Politechnika Lubelska. Instytut Informatyki
Tematy:
node
js
programowanie zdarzeniowe
event-driven programming
Opis:
W niniejszej publikacji omówiona została nowa technika tworzenia oprogramowania – programowanie sterowane zdarzeniami. Została ona porównana z innymi popularnymi technikami tworzenia serwisów w celu ujawnienia słabych punktów oraz sprawdzeniu, w jakich obszarach aplikacji internetowych nadaje się do stosowania.
This paper discusses a new programming method - event driven programming. This method is compared with other popular ways of implementing web services to find its weak points and discover in which areas of modern web applications it could be implemented.
Źródło:
Journal of Computer Sciences Institute; 2017, 3; 6-10
2544-0764
Pojawia się w:
Journal of Computer Sciences Institute
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza porównawcza szkieletów do budowy aplikacji internetowych w ekosystemie Node.js
The comparative analysis of web applications frameworks in the Node.js ecosystem
Autorzy:
Miłosierny, Bartosz
Dzieńkowski, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/1837816.pdf
Data publikacji:
2021
Wydawca:
Politechnika Lubelska. Instytut Informatyki
Tematy:
JavaScript frameworks
Node.js environment
performance comparative analysis
server application
szkielety programistyczne JavaScript
środowisko Node.js
analiza porównawcza wydajności
aplikacja serwerowa
Opis:
Przedmiotem badań była analiza porównawcza trzech szkieletów do budowy aplikacji internetowych działających w ekosystemie Node.js: Express (wersja 4.17.1), Hapi (wersja 20.0.1) oraz Koa (wersja 2.13.0). Przygotowano ekspe-ryment składający się z szeregu scenariuszy, podczas których dokonano pomiarów czasów odpowiedzi serwera na żądania przychodzące ze strony klienta. W ramach pracy zaimplementowano serwerowe aplikacje testowe obsługujące żądania HTTP (GET, POST, PUT, DELETE) realizujące typowe operacje na bazie danych. Aplikacje zawierały te same funkcjonalności i zostały zbudowane przy pomocy trzech testowanych szkieletów. W poszczególnych scenariuszach wysyłano od niezależnych klientów po 1000 żądań danego typu, dokonywano pomiarów czasów kolejnych odpowiedzi oraz obliczano ich średnie. Na podstawie uzyskanych wyników okazało się, że szkielety Hapi i Koa dla żądań typu GET, POST, PUT, DELETE, operujące na jednym obiekcie lub ciągu znaków Hello World! osiągnęły najlepsze, choć bardzo zbliżone czasy odpowiedzi. W przypadku żądania GET, przy większych obciążeniach zdecydowanie najlepszym okazał się szkielet Koa, uzyskując czasy odpowiedzi w przybliżeniu o 20% lepsze niż Express. Przy dużych obciążeniach zdecydowanie najgorzej wypadł szkielet Hapi osiągający ponad 2 razy dłuższe czasy odpowiedzi niż szkielet Koa.
The subject of the research was the comparative analysis of three frameworks for building web applications, i.e. Ex-press (version 4.17.1), Hapi (version 20.0.1) and Koa (version 2.13.0), operating in the Node.js ecosystem. An experi-ment was prepared consisting of a number of scenarios, during which the server response times to incoming requests from the client were measured. As part of the work, server test applications handling HTTP requests (GET, POST, PUT, DELETE) performing typical data operations were implemented. The applications contained the same functionalities and were built using the three tested frameworks. In individual scenarios, 1,000 requests of a given type were sent from independent clients, the times of successive responses were measured and their averages were calculated. On the basis of the obtained results, Hapi and Koa frameworks for GET, POST, PUT, DELETE requests, operating on one object or a string Hello World! have achieved the best, although very similar, response times. In the case of the GET request, the Koa framework proved to be the best for higher loads, achieving response times approximately 20% better than the Express framework. For high loads, the Hapi framework achieved the worst results, reaching response times over 2 times longer than the Koa framework.
Źródło:
Journal of Computer Sciences Institute; 2021, 18; 42-48
2544-0764
Pojawia się w:
Journal of Computer Sciences Institute
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zwiększenie efektywności procesu tworzenia aplikacji internetowych poprzez połączenie frameworków Meteor JS i Angular JS
Increasing an efficiency of the web-applications developing the process through the combine of frameworks MeteorJS and AngularJS
Autorzy:
Nishtuk, V.
Miłosz, E.
Powiązania:
https://bibliotekanauki.pl/articles/98472.pdf
Data publikacji:
2017
Wydawca:
Politechnika Lubelska. Instytut Informatyki
Tematy:
MeteorJS
AngularJS
frameworki
połączenie frameworków
JS - frameworks
unification frameworks
Opis:
Celem artykułu było przeprowadzenie analizy porównawczej frameworków AngularJS i MeteorJS, oraz próba ich połączenia w procesie tworzenia aplikacji internetowej Analiza porównawcza została wykonana na podstawie dokumentacji technicznej wybranych narzędzi oraz na podstawie oceny procesu tworzenia przykładowej aplikacji internetowej z ich udziałem. Wybrane zostały mocne strony każdego z narzędzi, zostały one wykorzystane w procesie tworzenia aplikacji internetowej, w którym połączono frameworki przydzielając każdemu z nich okresloną funkcjonalność aplikacji. Połaczenie frameworków miało na celu zwiększenie efektywności procesu wytwarzania aplikacji internetowej.
The comparative analysis was made on the basis of technical documentation selected tools and on the process of creating a sample web application. Strengths of each tool were selected and have been used in the process of developing a web application that combines frameworks by assigning each of them a specific application functionality. Combining of frameworks aimed increasing the efficiency of the developing process of web application.
Źródło:
Journal of Computer Sciences Institute; 2017, 3; 33-37
2544-0764
Pojawia się w:
Journal of Computer Sciences Institute
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Material Composition of Piezoelectric Elements with Chosen Shapes on Plate Vibration Reduction
Autorzy:
Wiciak, J.
Trojanowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/1197495.pdf
Data publikacji:
2014-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.40.-r
43.28.Js
46.40.Ff
Opis:
This paper presents numerical analysis of efficiency of different shapes and material composition of piezoelectric actuators used for vibration reduction. Four numerical models representing a plate clamped on all sides with two attached piezoelectric elements were created. For each model, one element had the same shape and composition and was used for plate excitation, and the other one, used for vibration reduction, had different shape and possibly material composition and could be of square or circular shape with either homogeneous or two-part material composition. Two modes were taken into account: the first mode and the fifth mode. Analysis of results was performed with ANSYS software.
Źródło:
Acta Physica Polonica A; 2014, 125, 4A; A-179-A-182
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Vibration and Acoustic Pressure Reduction Using Different Types of Piezo actuators
Autorzy:
Wiciak, J.
Trojanowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/1402184.pdf
Data publikacji:
2015-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.40.-r
43.28.Js
46.40.Ff
Opis:
This paper presents results of numerical simulations on reduction of sound pressure radiated from a square plate using different types of piezo actuators. For this purpose a FEM model was developed using ANSYS software with said steel plate with a hemisphere of air on one side of the plate. There are two criteria by which the reduction is measured: minimising vibrations of plate area and minimising sound pressure on a half sphere surrounding the plate. Changes in the results for both the radiated sound pressure and plate vibration are discussed.
Źródło:
Acta Physica Polonica A; 2015, 128, 1A; A-62-A-66
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reduction of Vibration of Fluid Loaded Plate with Piezoelectric Elements - a Comparison of Analytical, FEM Harmonic Analysis, and Real Results
Autorzy:
Iwański, D.
Wiciak, J.
Powiązania:
https://bibliotekanauki.pl/articles/1400083.pdf
Data publikacji:
2013-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.28.Js
43.30.-k
43.30.+m
Opis:
In the present paper, a comparison of analytical calculations, FEM harmonic analysis, and real data from laboratory stand of fluid-loaded structure were taken under consideration. Resonant frequencies of the investigated structure were measured using swept sine technique on laboratory stand. Analytical calculations of the first twelve modes were made and the numerical model was build using the finite element method. Results from real data, analytical calculations, and numerical calculations are comparable.
Źródło:
Acta Physica Polonica A; 2013, 123, 6; 1040-1043
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Efficiency of Different Shapes of Homogeneous and Two-Part Piezo Elements on Vibration Reduction
Autorzy:
Trojanowski, R.
Wiciak, J.
Powiązania:
https://bibliotekanauki.pl/articles/1418045.pdf
Data publikacji:
2012-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.28.Js
43.40.-r
46.40.Ff
Opis:
The subject of this work is a numerical analysis of efficiency of different piezo element shapes and types used for vibration (and later structural sound) reduction. The shapes of both types of piezo elements used are as follows: square, right-angled triangle, and parallelogram. There are 2 types of piezo elements used in this study: homogeneous elements and elements consisting of 2 parts (inner and outer) of different composition. These are attached to steel plate clamped on all sides. For every simulation 5 elements are used as actuators, with 1 as disturbance source, and other 4 as active dampers. On the other side of a plate 4 elements are placed acting as vibration sensors. The actuator used as a disturbance source as well as sensors are always in the shape of a square. 4 modes were taken into account (analyzed each one singular and all together). Analyses were made with the use of ANSYS software.
Źródło:
Acta Physica Polonica A; 2012, 122, 5; 905-907
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kult Serca Jezusowego w wybranych pismach św. Józefa Sebastiana Pelczara
The cult of the Sacred Heart of Jesus in the selected writings of St. Joseph Sebastian Pelczar
Autorzy:
Słoma, Ireneusz
Powiązania:
https://bibliotekanauki.pl/articles/502660.pdf
Data publikacji:
2013
Wydawca:
Wyższe Seminarium Duchowne w Łodzi
Tematy:
Serce Jezusa
duchowość chrześcijańska
Józef Sebastian Pelczar
pisma J.S. Pelczara
Opis:
The cult of the Sacred Heart of Jesus centuries exists in the Church. Many of the saints propagated this worship, because themselves practiced this spirituality. One of them was St. Joseph Sebastian Pelczar (1842–1924), Bishop of the Diocese of Przemysl in the years 1901–1924 cared of sanctification of himself and other worshippers. He was a zealous apostle of the Sacred Heart of Jesus. He saw in it an efficient way to achieve holiness. Especially he recommended this cult in many writings. In the most important of them everyone can see that personal practice of the Sacred Heart cult transforms a worshipper on model of Jesus Christ. For this reason the Sacred Hearth worship should be practice by everyone. It also makes, resulting from the source of Divine Love they becomes an authentic worshippers. The people propagating this worship and caring about it help themselves and other people in achieving eternal happiness. The human life resulting from the cult of the Sacred Heart of Jesus transforms the present life and directs it to eternity.
Źródło:
Łódzkie Studia Teologiczne; 2013, 22; 169-175
1231-1634
Pojawia się w:
Łódzkie Studia Teologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The rapid prototyping of aircraft wheel hub model with the use of techniques JS, SLA, FDM
Autorzy:
Śliwa, R. E.
Budzik, G.
Bernaczek, J.
Dziubek, T.
Powiązania:
https://bibliotekanauki.pl/articles/245987.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
prototype
aircraft wheel hub
rapid prototyping
techniques JS
SLA
FDM
Opis:
Design work related to the implementation of new aerospace elements requires the use of 3D-CAD modelling techniques and rapid prototyping, which makes it possible to significantly accelerate the deployment of new solutions. The article presents the possibility of using some methods of rapid prototyping to produce the research model of a wheel hub forming part of the landing gear. Incremental rapid prototyping methods - JS (Jetting System), SLA (Stereolithography), FDM (Fused Depositing Modelling) - have been characterized with regard to the technology of executing a hub model, the parameters of the manufacturing apparatus, and comparing basic technical data of materials used in the analyzed processes. One of the elements of the process of prototyping was to process data in other equipment for rapid prototyping. This process consisted of the following steps: defining the parameters of model building, determining the appropriate model settings in the workspace of manufacturing equipment, editing the supporting structure, verifying the subsequent layers through the simulation of model building process, generating output numerical procedures for manufacturing equipment. Manufactured prototypes have been evaluated of dimensional accuracy with the use coordinate measuring machine. Also measured the surface roughness. Conducted studies were the basis to determine the applicability of various methods of rapid prototyping in the process of research and manufacturing aircraft wheel hub.
Źródło:
Journal of KONES; 2011, 18, 3; 439-443
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza wydajnościowa wybranych narzędzi do budowy aplikacji Single Page Application
Performance analysis of selected tools for building a Single Page Application
Autorzy:
Timanovskyi, Yehor
Plechawska-Wójcik, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/98466.pdf
Data publikacji:
2020
Wydawca:
Politechnika Lubelska. Instytut Informatyki
Tematy:
SPA
szkielet JavaScript
Angular
Vue.js
wydajność
frameworks JavaScript
performance
Opis:
W artykule przedstawiono analizę wydajnościową z wykorzystaniem wybranych narzędzi do budowy Single Page Application. Do oceny wydajności aplikacji testowej używana została przeglądarka Google Chrome z narzędziem DevTools. Całkowita liczba wszystkich testów wynosiła 112. W ramach przeprowadzonego badania powstała aplikacja testowa z wykorzystaniem różnych szkieletów JavaScript - szkieletu Angular i szkieletu Vue.js.
The article presents analysis of the performance of selected tools to build a Single Page Application. Chrome browser with DevTools tool was used to evaluate the performance of the test application. The total number of all tests was 112. As part of the study, a test application was created using different JavaScript frameworks - the Angular framework and the Vue.js framework.
Źródło:
Journal of Computer Sciences Institute; 2020, 14; 82-87
2544-0764
Pojawia się w:
Journal of Computer Sciences Institute
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phase-Locked Particle Image Velocimetry Visualization of the Sound Field at the Outlet of a Circular Tube
Autorzy:
Weyna, S.
Mickiewicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/1196700.pdf
Data publikacji:
2014-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.58.+z
43.28.Js
43.25.-x
47.35.Rs
Opis:
The shedding process and acoustic flow formation in the region of outlet of a cylinder duct has been investigated by means of the particle image velocimetry (PIV) technique. The research work on the behavior of the sound field at outlets of waveguides addresses issues of importance to industrial applications. The obtained results can be used in a number of industrial applications involving pipes, ducts and tubing. In our investigation the acoustics flow fields are measured with a phase-locked PIV system with high sampling rate and large internal memory block using DAVIS v. 8.11 software. A cross-correlation method, in conjunction with the FFT analysis, is used as a vector processing algorithm. A series of PIV vector maps was used to evaluate the acoustic velocity field at the open end of circular tube throughout the acoustic cycle for frequencies of 700 Hz and 1400 Hz. Six phase steps were assumed for one frequency cycle and the characteristic signal was extracted from the velocity data step and shown graphically.
Źródło:
Acta Physica Polonica A; 2014, 125, 4A; A-108-A-112
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza porównawcza zastosowania szkieletów Angular2 i Ember.js
Comparative analysis of the usage of Angular2 and Ember.js frameworks
Autorzy:
Palak, Jan
Plechawska-Wójcik, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/98268.pdf
Data publikacji:
2018
Wydawca:
Politechnika Lubelska. Instytut Informatyki
Tematy:
Angular 2
Ember.js
porównanie bibliotek Javascript
comparative analysis
Javascript frameworks
Opis:
Celem artykułu jest analiza porównawcza bibliotek Angular2 z Ember.js. Na potrzeby testów została opracowana specjalna aplikacja internetowa. W świetle kryteriów porównawczych analizie poddano: szybkość generowania strony, wyświetlanie dużej liczby danych, obsługa multimediów, mechanizmy zabezpieczeń, dostępność dokumentacji, obsługę różnych formatów danych, integrację z portalami społecznościowymi. Ponadto celem jest również prezentacja cech wspólnych oraz różnic obu bibliotek.
The focus of this article is the comparative analysis of the usage of the Angular2 and Ember.js frameworks. The requirement for tests of these frameworks has been developed though special web applications. The analysis was performed with the following comparative criteria: the speed of the website generation, presentation of large amount of data, media services, security mechanism, documentation availability, different data format handling, and integration with social media. Also, this paper aims to present common features and differences between the two frameworks regarding their characteristic features.
Źródło:
Journal of Computer Sciences Institute; 2018, 7; 205-209
2544-0764
Pojawia się w:
Journal of Computer Sciences Institute
Dostawca treści:
Biblioteka Nauki
Artykuł
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