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Wyświetlanie 1-15 z 27
Tytuł:
Między mężczyznami. Proza Wilhelma Macha – socrealizm psychoanalizą podszyty
Between Men Wilhelm Mach’s Prose: Social Realism Streaked with Psychoanalysis
Autorzy:
Śmieja, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/534581.pdf
Data publikacji:
2015
Wydawca:
Wydawnictwo Uniwersytetu Śląskiego
Tematy:
Mach,
masculinity
psychoanalysis
socialist realism
homosexuality
queer
Opis:
The presentation of the work of the now forgotten writer concentrates on three key issues: Wilhelm Mach’s homosexual biography and the problems arising from it, ambiguity of the categories of masculinity, brotherhood and fatherhood, used by Mach, as well as “family anti-utopias,” whose portrayals can be found in Rdza [Rust] or Jaworowy dom [Sycamore House]. The author attempts to restore Mach’s name as an important figure in the history of the struggles of the Polish modernity with nonnormative sexuality; the writer’s political involvement is read as a consequence of the faith in the emancipatory power of the new order.
Źródło:
Śląskie Studia Polonistyczne; 2015, 7, 2; 77-98
2084-0772
2353-0928
Pojawia się w:
Śląskie Studia Polonistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phase coding of information in the optical fibre sensor
Autorzy:
Życzkowski, M.
Karol, M.
Pałka, N.
Powiązania:
https://bibliotekanauki.pl/articles/1818224.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
optical fibre sensors
Mach-Zehnder interferometer
quantum sensors
Opis:
Determining the dependence of phase difference modulations between light pulses in a modified Mach-Zehnder interferometer was used to develop an optical system coding the information and working as an eavesdropping sensor for an optical fibre information exchange system. The basic challenge in the system development is to maintain stable operation in changing environmental conditions, as well as to ensure optimal parameters of the phase modulator. The system was tested for various many-kilometer long transmission lines of single-mode fibres. The research was focused on achieving the normative Bit Error Rate for the system in the 100 Mbit/s range (STM-1). Such a system can be used in commercial applications for the code key secure transmission in the physical layer of the link.
Źródło:
Opto-Electronics Review; 2020, 28, 1; 1--7
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vibration sensing with the optical fibre Mach-Zehnder interferometer
Autorzy:
Kurzych, Anna T.
Jaroszewicz, Leszek R.
Powiązania:
https://bibliotekanauki.pl/articles/27315693.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
Mach-Zehnder interferometer
vibration sensor
optical fibre technology
Opis:
Vibration is a ubiquitous phenomenon that occurs in everyday life and people are exposed to it almost all the time. Most often, vibration is measured using electromechanical devices such as piezoelectric, piezoresistive, or capacitive accelerometers. However, attention should be paid to the limitations of such vibration sensors. They cannot operate in the presence of strong electromagnetic fields. Measurements with electromechanical devices require physical contact between the sensor and the vibrating object, which is not always possible due to the design of the sensor and device. The possibility of a non-contact vibration measurement in harsh environments is provided by the technology of interferometric fibre optic sensors. This paper reports the principle of operation, design aspects, experimentation, and performance of a Mach-Zehnder interferometric setup for the measurement of vibration frequency. There are different sensing arms implemented in the interferometer: single-mode, polarization-maintaining, and tapered optical fibre. The paper emphasises the simplicity of the set-up structure and the detection capabilities based on the interferometric sensing giving the possibility of constructing a commercial vibration sensor for all industry demands.
Źródło:
Opto-Electronics Review; 2023, 31, 4; art. no. e148992
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical and Experimental Study on Detonation Wave Propagation in Cylindrical High Explosive Charges with a Wave-shaper
Autorzy:
Pan, J.
Zhang, X.
He, Y.
Deng, Q.
Guan, Z.
Powiązania:
https://bibliotekanauki.pl/articles/358040.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
high explosive
detonation wave
Mach reflection
wave-shaper
Whitham method
Opis:
The use of a cylindrical high-explosive charge with a wave-shaper is an efficient way to obtain an ultra-high pressure and a convergent detonation wave. An analysis of flow fields corresponding to the regular and Mach reflection of detonation waves in a cylindrical high-explosive charge with a wave-shaper is presented in this paper. The pressure, flow velocity and triple point growth angle of the Mach stem were calculated. The Mach stem height was also determined by using the modified Whitham method. The results show that the Mach stem height rises from zero at the critical angle of Mach reflection and changes to the Chapman-Jouguet detonation state with the propagation of the detonation waves. Shock indentation experiments were conducted, in which a wave-shaper was used in a cylindrical high-explosive charge to form Mach reflection detonation waves. The results showed that the discrepancy between the experimental results and the theoretical calculations was less than 15%, which proves the validity of the proposed theoretical model.
Źródło:
Central European Journal of Energetic Materials; 2016, 13, 3; 658-676
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A preconditioned solution scheme for the computation of compressible flow in turbomachinery at arbitrary mach numbers
Autorzy:
Anker, J. E.
Mayer, J. F.
Stetter, H.
Powiązania:
https://bibliotekanauki.pl/articles/1986683.pdf
Data publikacji:
2002
Wydawca:
Politechnika Gdańska
Tematy:
preconditioning
non-reflecting boundary condition
Mach number independency
turbomachinery flow
Opis:
A preconditioned solution scheme for the computation of compressible flow in turbomachinery at arbitrary Mach numbers is presented. The preconditioning technique used is applied to a state-of-the-art explicit, time-marching Navier-Stokes code which originally was developed for compressible, high-speed turbomachinery applications. It combines the ideas of low Mach number preconditioning and artificial compressibility method into a unified approach where principally fluids with arbitrary equations of state can be simulated. As shown by the test cases presented, it allows the code to simulate flows efficiently and accurately independent of the Mach number. A description of the Navier-Stokes equations for rotating coordinate systems, along with the solution scheme and the details of the preconditioning method is given. Since turbomachinery computations are often performed on truncated domains, the solution scheme should be used in conjunction with non-reflecting boundary conditions. A change in the time-dependency of the equations due to preconditioning necessitates a modification of the boundary conditions. Thus, a derivation of the appropriate boundary conditions for the presented preconditioned scheme was performed and the resultant equations are given in this paper. The effectiveness of the new boundary conditions is demonstrated by comparing them with both boundary conditions that use the standard one-dimensional characteristic approach and the original boundary conditions for the non-preconditioned case.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2002, 6, 1; 143-176
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and validation of a single-jack variable Mach number nozzle in a cryogenic transonic wind tunnel
Autorzy:
Yu, Chengguo
Zhang, Zhili
Wang, Ning
Nie, Xutao
Peng, Qiang
Chen, Zhenhua
Powiązania:
https://bibliotekanauki.pl/articles/2200829.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
cryogenic
flow uniformity
single-jack nozzle
transonic wind tunnel
variable
Mach number
Opis:
The wind tunnel with variable Mach numbers controlled by a single jack is highly desired in the aerospace, automobile and building industry due to its superior controllability and working range. Decreasing the temperature of a test gas is an efficient and economical approach to achieving higher Reynolds numbers that accommodate all working statuses of test subjects, which however, brings new challenges to the wind tunnel design nowadays. This paper proposes a new design concept of a single-jack variable Mach number nozzle based on its particular cryogenic characteristics, as the nozzle is the core structure to achieve variable Mach numbers. The contours of the nozzle under different Reynolds numbers and Mach numbers are modeled and solved by an incomplete elliptic integral, followed by modification with cryogenic characteristics. A 0.3-m cryogenic wind tunnel is utilized as a validation platform for the nozzle design, resulting in designed contours being in line with the measured contours. Moreover, the root means square (RMS) deviations of Mach number 1.3 at the core position are controlled within 0.011 in low and high temperatures, which surpasses the other existing wind tunnels.
Źródło:
Journal of Theoretical and Applied Mechanics; 2022, 60, 4; 719--732
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fuzzy-based prediction for suddenly expanded axisymmetric nozzle flows with microjets
Autorzy:
Quadros, Jaimon D.
Suhas, P.
Khan, Sher A.
Aabid, Abdul
Baig, Muneer
Mogul, Yakub I.
Powiązania:
https://bibliotekanauki.pl/articles/2173710.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
base pressure
Mach number
fuzzy modeling
ciśnienie bazowe
liczba Macha
modelowanie rozmyte
Opis:
The current research focuses on the implementation of the fuzzy logic approach for the prediction of base pressure as a function of the input parameters. The relationship of base pressure (β ) with input parameters, namely, Mach number (M), nozzle pressure ratio (η), area ratio (α), length to diameter ratio (ξ ), and jet control (ϑ ) is analyzed. The precise fuzzy modeling approach based on Takagi and Sugeno’s fuzzy system has been used along with linear and non-linear type membership functions (MFs), to evaluate the effectiveness of the developed model. Additionally, the generated models were tested with 20 test cases that were different from the training data. The proposed fuzzy logic method removes the requirement for several trials to determine the most critical input parameters. This will expedite and minimize the expense of experiments. The findings indicate that the developed model can generate accurate predictions
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 5; art. no. e142654
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In-fiber Mach–Zehnder interferometer based on polarization-maintaining fiber for displacement and temperature sensing
Autorzy:
Cheng, Jun-Ni
Jiang, Xiao-Yan
Powiązania:
https://bibliotekanauki.pl/articles/2202764.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
displacement sensing
polarization-maintaining fiber
graded-index multimode fiber
Mach-Zehnder interferometer
Opis:
A displacement sensor based on polarization-maintaining fiber has been proposed and proved in experiment. The polarization-maintaining fiber (PMF) is sandwiched with two graded-index multimode fibers (GI MMF), which form the Mach–Zehnder interferometer (MZI) sensor. Graded-index multimode fiber serve as an optical coupler for modes conversion. The results show that with the increase of displacement, the spectrum moves to the long wavelength direction, but when temperature increases, the spectrum has a red shift, which means that the displacement and temperature can be measured separately according to the wavelength drift direction. The sensor consists of 4 mm GI MMF and 14 mm PMF, which can exhibit the displacement sensitivity of –9.275 pm/μm in the range of 0–600 μm. In addition, temperature will also affect the sensitivity of displacement measurement, so the sensitivity of the sensor to temperature is also measured. The results show that the selected monitoring dip provides a better temperature sensitivity of 33.605 pm/°C in the range of 35–75°C. The sensor is easy to fabricate and does not has any functional coating, which make it become a good candidate in the industrial field.
Źródło:
Optica Applicata; 2023, 53, 1; 21--33
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Generation of chirped microwave signal with any central frequency based on a nonuniformly spaced finite impulse response filter
Autorzy:
Chen, D.
Wang, R.
Pu, T.
Xiang, P.
Fang, T.
Zheng, J.
Xiong, J.
Powiązania:
https://bibliotekanauki.pl/articles/174334.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
microwave photonics
microwave photonic filter
chirped microwave signal
dual drive Mach–Zehnder modulator
Opis:
A novel optical approach to generating a chirped microwave signal by using a nonuniformly spaced finite impulse response filter is proposed and demonstrated. In this scheme, a narrowband Gaussian pulse is used as the original chirped-free signal, which is easy to be acquired. To eliminate the need of a wideband chirped-free signal, a mixer and a radio frequency signal are used to up-convert the spectrum of the original Gaussian signal. Therefore, the required frequency response can be calculated and reconstructed by a finite impulse response filter with nonuniformly spaced taps. Besides, a dual drive Mach–Zehnder modulator is used to realize single sideband modulation of the chirpedfree signal. Thus, the transfer function induced by the fiber dispersion is eliminated and the chirped microwave signal with any central frequency can be generated. In this paper, a design example of a filter with a central frequency of 10GHz is provided, and generation of the target chirped microwave signal is also demonstrated by numerical simulations.
Źródło:
Optica Applicata; 2016, 46, 3; 399-408
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of dispersion order on optical millimetre-wave generation based on series optical external modulators without an optical filter
Autorzy:
Singh, M.
Raghuwanshi, S. K.
Powiązania:
https://bibliotekanauki.pl/articles/174512.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
fiber chromatic dispersion
microwave photonics
radio-over-fiber
dual-drive Mach–Zehnder modulator
Opis:
The influence of higher order fiber dispersions (like chromatic dispersion and dispersion slope) on the optical millimeter-wave generation is studied. Optical sideband suppression ratio and radio frequency spurious suppression ratio are given and discussed. Moreover, the mathematical results of the proposed model are verified by experiments and numerical simulations.
Źródło:
Optica Applicata; 2015, 45, 2; 215-226
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Афективното естество на реализма – за не-човешките субекти в прозата на Вилхелм Мах
The Affective Nature of Realism – on Non-Human Subjects in Wilhelm Mach’s Prose
Autorzy:
Kovacheva, Adriana
Powiązania:
https://bibliotekanauki.pl/articles/2046618.pdf
Data publikacji:
2021-11-27
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
realism
affect
ecocriticism
Blaga Dimitrova
Wilhelm Mach
реализъм
афект
Блага Димитрова
Вилхелм Мах
Opis:
Статията разглежда мястото на творчеството на Вилхелм Мах през 60-те години на ХХ век в полската проза, когато се смята, че романът има основно познавателни цели. Мах не се противопоставя пряко на тази тенденция, но основният проблем, който го интересува, е какво превръща литературата в преживяване. Статията проследява развитието на този въпрос в творчеството на писателя, съсредоточавайки се върху епизоди и фрагменти от неговата проза, в които са описани мъчения и убийства на домашни животни. Тези сцени показват основните механизми за предаване на афекти в прозата на Мах. Техният анализ показва, че според писателя литературата работи тогава, когато е в състояние да предаде афекта и да създаде условия за неговото пълно изразяване. Поставена е хипотезата, че афективният реализъм, който търси Мах, може да бъде четен като контекст и контрапункт за прозата на Блага Димитрова.
The article examines the problem of the special place occupied by the prose writer Wilhelm Mach in the Polish literary field in the 1960s, when it was suggested that the novel had mainly cognitive functions. Mach does not openly oppose this tendency, but his work is concerned with the question what makes literature an experience. The article traces the development of this problem in Mach’s work, focusing on novel scenes and episodes of killing or torturing domestic animals in which the writer’s mechanism for depicting affects plays a key role. Their analysis shows that, according to Mach, a literary work works when it transmits affects and demonstrates the ultimate possibilities for their expression. The article tests the hypothesis that Wilhelm Mach’s search for affective realism can be seen as a counterpoint and context to Blaga Dimitrova’s fiction.
Źródło:
Poznańskie Studia Slawistyczne; 2021, 21; 127-139
2084-3011
Pojawia się w:
Poznańskie Studia Slawistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evidence for a Causal Relationship Between Mach’s Principle and the Quantitative Latency for Universal Entanglement
Autorzy:
Persinger, M. A.
Koren, S. A.
Powiązania:
https://bibliotekanauki.pl/articles/412579.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Mach’s principle
entanglement latency
1023 m•s-1
inertial frame dragging
gravitationalelectromagnetic differentiation
Opis:
Support for Mach’s principle of the Prominence or the Immanence of the Universe which states that the behavior of any part of the Cosmos is determined by all of its parts requires quantitative convergence from the appropriate combination of universal parameters. Applications of recent calculations based upon a diffusivity with a real value (~1023 m•s-1) revealed solutions that are consistent with the concept of dragging inertial frames and geodetic (Lense-Thirring) precession. The latency for non-local entanglement around the earth is similar to frame dragging as measured by Ciufolini. The independent solution for this real value to capture Mach’s “whole universe” requires the contribution from quantum-level Zero Point Fluctuations. Consideration of this value for solar-terrestrial distances could explain the non-local “gravitational” effects upon biological reactions that appear to precede electromagnetic effects. The verification of the “entanglement latency” by independent methods could produce the validation for Mach’s principle.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 15; 80-86
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zbliżenie na biedronkę. Konwicki, Mach i ujęcie z niebyłej adaptacji
Close-up on the Ladybug. Konwicki, Mach and a Shot from an Unrealized Adaptation
Autorzy:
Kaniecki, Przemysław
Powiązania:
https://bibliotekanauki.pl/articles/26850812.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Instytut Sztuki PAN
Tematy:
Tadeusz Konwicki
Wilhelm Mach
scenariusz
filmy niezrealizowane
aluzja literacka
screenplay
unrealised films
literary allusion
Opis:
Przedmiotem artykułu jest podobieństwo motywu biedronki w scenariuszu (autorstwa Tadeusza Konwickiego, Jerzego Kawalerowicza i Wilhelma Macha) niezrealizowanego filmu o wyprawach kosmicznych Witaj, Ziemio (1959) oraz bliźniaczego motywu w powieści Wniebowstąpienie (1967) Konwickiego. Autor wykazuje, że motyw ten nie stanowi jedynie nieświadomej reminiscencji, ale został wprowadzony przez pisarza do tekstu powieści z rozmysłem i w konkretnych celach, które zostają tu zrekonstruowane. Omawia znaczenia figury biedronki w maszynopisie scenariusza oraz sensy, które nawiązanie to wnosi do Wniebowstąpienia. Przedstawia również komplikacje z zakresu teorii literatury ujawniające się przy opisie tego nawiązania. Wynikają one z tego, że tekst, do którego Konwicki się odwołał, nie funkcjonuje w obiegu (zatem trudno mówić o aluzji literackiej, skoro odbiorcy nie mogli wiedzieć, że motyw jest aluzją). Problemy te spiętrza jeszcze milczenie pisarza na temat scenariusza – nie opowiadał o nim ani nawet nie sugerował jego związków z Wniebowstąpieniem. Autor próbuje więc dociec, jakie mogły być intencje Konwickiego i jak podobieństwa obu motywów można wpisać w kategorie teoretycznoliterackie.
The article discusses the similarity between the motif of the ladybug in the screenplay (by Tadeusz Konwicki, Jerzy Kawalerowicz, and Wilhelm Mach) of an unrealized film about space expeditions, Witaj, Ziemio (Welcome, Earth) (1959), and the twin motif from Kowicki’s novel Wniebowstąpienie (Ascension) (1967). The author shows that the appearance of the ladybug is not just an unconscious reminiscence, but the motif was deliberately introduced by Konwicki into the text of the novel, for specific purposes that are reconstructed here. He discusses the meanings of the motif in the screenplay’s typescript, and the contribution of this reference to the meanings of Ascension. He also presents the literary-theoretical complications that arise in describing the reference, which result from the fact that the text evoked by Konwicki is not in circulation; it is difficult to speak of a literary allusion if the readers did not understand that the motif is an allusion. These complications are compounded by the writer’s silence about the script – he did not talk about it or even hint at its connection to Ascension. The author tries to find out what Konwicki’s intentions might have been and how the similarities between the two motifs can be put into literary-theoretical categories.
Źródło:
Kwartalnik Filmowy; 2022, 118; 42-57
0452-9502
2719-2725
Pojawia się w:
Kwartalnik Filmowy
Dostawca treści:
Biblioteka Nauki
Artykuł
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