Academic literature on the topic 'Pulsatoria'

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Journal articles on the topic "Pulsatoria"

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Fryč, J., R. Kukla, and J. Los. "Possible use of vacuum controlled pulsators for sheep milking machines." Research in Agricultural Engineering 50, No. 1 (2012): 23–27. http://dx.doi.org/10.17221/4922-rae.

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Comparison measurements and evaluation of the suitability of three pulsators for sheep milking machines were carried out, i.e. a prototype made by the manufacturer of the milking parlour of the pulsator ratio 50% (50:50) and two hydraulic pulsators of the Danish manufacturer S.A. Christensen (SAC), models Unipuls-2 of the pulsator ratios 50% (50:50) and 60% (60:40). The specified pulsation rate was 2.5/s(150/min). It was found that the pulsator prototype made by the milking parlour manufacturer slowly passed air, whereby the vacuum in pulsation chambers did not attain the maximum value. Fig. 2
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Burssens, S., D. M. Bowman, C. Aerts, M. G. Pedersen, E. Moravveji та B. Buysschaert. "New β Cep pulsators discovered with K2 space photometry". Monthly Notices of the Royal Astronomical Society 489, № 1 (2019): 1304–20. http://dx.doi.org/10.1093/mnras/stz2165.

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Abstract We present the discovery of three new β Cep pulsators, three new pulsators with frequency groupings, and frequency patterns in a B3Ib star, all of which show pulsations with frequencies as high as about 17 d−1, with K2 space mission photometry. Based on a Fourier analysis and iterative pre-whitening, we present a classification and evaluate the potential for asteroseismic modelling. We include the lists of pulsation frequencies for three new β Cep pulsators, CD-28 12286, CD-27 10876, LS 3978, and additional pulsation mode frequencies for the known β Cep pulsator HD 164741. In addition
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Salazar-Vallejo, Sergio I., Patrick Gillet, and Victor Surugiu. "How false is Nereis falsa (Annelida, Phyllodocida, Nereididae)?" Revista de Biología Tropical 65, no. 3 (2017): 847. http://dx.doi.org/10.15517/rbt.v65i3.26635.

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There are many taxonomic problems in polychaete species names and solving confusing or inadequate taxonomic procedures is both time-demanding and extremely important. Our objective in this contribution was to analyse what is the current taxonomic situation for Nereis falsa de Quatrefages, 1866; it was based upon Nereis pulsatoria? Rathke, 1837 from the Black Sea, and it is currently regarded as having a very wide distribution. The species has been collected from different benthic substrates and even can be found on floating objects or marine turtles. Nereis falsa has been recorded from the Med
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Westwood, J. O. "XV. Observations upon the structural Character of the Death Watch (Atropos pulsatoria), with Description of a new British Genus in the Family to which it belongs." Transactions of the Royal Entomological Society of London 4, no. 1 (2009): 71–72. http://dx.doi.org/10.1111/j.1365-2311.1845.tb01339.x.

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Yatsunskyi, Petro. "THE RESULTS OF RESEARCH PNEUMATIC ELECTROMAGNETIC PULSATOR COMBINED WITH COLLECTOR." Mokslas - Lietuvos ateitis 14 (February 1, 2022): 1–4. http://dx.doi.org/10.3846/mla.2022.15162.

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This article demonstrates the results of experimental research one of the pulsators. Its main difference from others is a pneumatic electromagnetic pulsator in combination with a collector. Therefore, this article describes in detail the process of studying the pulsator. The planned experiment was carried out on by Factorial experiments with multiple factors. The influence of factors (the ripple frequency n, the milk ejection q and the ratio between strokes t/T) on the vacuum pressure in the inter wall chamber of teat cups was studied. The regression equation of the dependence response criteri
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Clausen, Mabel E., and Kurtis A. Williams. "Photometric Monitoring of the ZZ Ceti Star PG 1541+651." Research Notes of the AAS 7, no. 6 (2023): 122. http://dx.doi.org/10.3847/2515-5172/acdc93.

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Abstract The Kepler and K2 missions discovered multiple ZZ Ceti white dwarf pulsators that exhibit recurrent outbursts. These outbursting white dwarfs are near the red edge of the ZZ Ceti instability strip, suggesting that the phenomenon is physically related to the cessation of pulsations. We present multi-day ground-based monitoring of the poorly studied red-edge ZZ Ceti pulsator PG 1541+651. We do not detect any outbursts in our data. We do find that this pulsator has a very rich and time-variable spectrum of modes in its periodogram. The white dwarf lies in the northern continuous viewing
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Zaripova, Lilia, and Vladimir Shaydakov. "Hydromechanical vibrator-pulsator for restoring the injectivity of injection wells." E3S Web of Conferences 524 (2024): 03029. http://dx.doi.org/10.1051/e3sconf/202452403029.

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The article presents a bench model of a vibrator pulsator with a hydromechanical principle of operation designed for processing the bottom-hole zone of the reservoir of injection and production wells, columns of tubing, field pipelines.The design uses a spring-loaded rotary valve. The design of the test bench is described. According to the results of bench tests, the parameters of the pulsator’s stable operation were revealed: at a liquid flow rate of 0.012 m3/s, the oscillation amplitude of the pulsator body was 300 microns, the amplitude of liquid pressure fluctuations was 1.8 MPa at a frequ
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Kurtz, D. W., G. Handler, S. A. Rappaport, et al. "The single-sided pulsator CO Camelopardalis." Monthly Notices of the Royal Astronomical Society 494, no. 4 (2020): 5118–33. http://dx.doi.org/10.1093/mnras/staa989.

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ABSTRACT CO Cam (TIC 160268882) is the second ‘single-sided pulsator’ to be discovered. These are stars where one hemisphere pulsates with a significantly higher amplitude than the other side of the star. CO Cam is a binary star comprised of an Am δ Sct primary star with Teff = 7070 ± 150 K, and a spectroscopically undetected G main-sequence secondary star. The dominant pulsating side of the primary star is centred on the L1 point. We have modelled the spectral energy distribution combined with radial velocities, and independently the TESS light curve combined with radial velocities. Both of t
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Jayaraman, Rahul, Saul A. Rappaport, Brian Powell, et al. "TIC 435850195: The Second Triaxial Tidally Tilted Pulsator." Astrophysical Journal 975, no. 1 (2024): 121. http://dx.doi.org/10.3847/1538-4357/ad77c3.

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Abstract The Transiting Exoplanet Survey Satellite (TESS) has enabled the discovery of numerous tidally tilted pulsators (TTPs), which are pulsating stars in close binaries where the presence of a tidal bulge has the effect of tilting the primary star’s pulsation axes into the orbital plane. Recently, the modeling framework developed to analyze TTPs has been applied to the emerging class of triaxial pulsators, which exhibit nonradial pulsations about three perpendicular axes. In this work, we report on the identification of the second-ever discovered triaxial pulsator, with 16 robustly detecte
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Gootkin, Keyan, Marc Hon, Daniel Huber, Daniel R. Hey, Timothy R. Bedding та Simon J. Murphy. "A New Catalog of 100,000 Variable TESS A-F Stars Reveals a Correlation between δ Scuti Pulsator Fraction and Stellar Rotation". Astrophysical Journal 972, № 2 (2024): 137. http://dx.doi.org/10.3847/1538-4357/ad5282.

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Abstract δ Scuti variables are found at the intersection of the classical instability strip and the main sequence on the Hertzsprung–Russell diagram. With space-based photometry providing millions of light curves of A-F type stars, we can now probe the occurrence rate of δ Scuti pulsations in detail. Using the 30 minutes cadence light curves from NASA's Transiting Exoplanet Survey Satellite's first 26 sectors, we identify variability in 103,810 stars within 5–24 cycles per day down to a magnitude of T = 11.25. We fit the period–luminosity relation of the fundamental radial mode for δ Scuti sta
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Dissertations / Theses on the topic "Pulsatoria"

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CASATI, ANNA. "LA PRESSIONE PULSATORIA NELLA POPOLAZIONE GENERALE: STUDIO DELLA DISTRIBUZIONE DELLA VARIABILE, DELLA SUA CORRELAZIONE CON I FATTORI DI RISCHIO CARDIOVASCOLARE E SUO IMPATTO PROGNOSTICO A LUNGO TERMINE." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2017. http://hdl.handle.net/10281/180697.

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Background: i valori espressi nelle misurazioni della pressione arteriosa derivano dall’interazione di due componenti, una statica rappresentata dalla pressione arteriosa media e una dinamica rappresentata dalla pressione pulsatoria (PP). Alcuni studi hanno posto attenzione alla componente pulsatoria della pressione arteriosa, calcolata come differenza tra pressione arteriosa sistolica e diastolica, valutando l’associazione tra PP e successiva occorrenza di eventi cardiovascolari. Tuttavia la maggioranza di questi studi sono stati effettuati su popolazioni selezionate in base a diversi paramet
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Suard, Sylvain. "Propagation pulsatoire des flammes de brouillard." Laboratoire de modélisation et simulation numérique en mécanique et génie des procédés (Marseille), 2004. http://www.theses.fr/2004AIX22100.

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Giuliani, Fabrice. "Étude du comportement d'un système d'injection de turbomachine en régime pulsatoire forcé." Toulouse, ENSAE, 2002. http://www.theses.fr/2002ESAE0007.

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Les instabilités de combustion apparaissant dans les systèmes aérobies de type turbomachine résultent d'un couplage aéro-thermo-acoustique et provoquent une usure accrue des pièces constituantes du foyer. Dans le contexte de la compréhension physique des phénomènes de couplage impliqués dans l'apparition, le maintien voire l'encouragement de ces instabilités de combustion, on analyse l'incidence d'une injection instationnaire de carburant sur le processus de combustion. Une installation expérimentale a été conçue dans ce but à l'ONERA Centre de Toulouse. La modulation générée par la pression a
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Andriamihafy, Herison. "Débitmétrie par diaphragme en écoulement pulsatoire sources d'erreurs et corrections, approche expérimentale et modélisation." Grenoble : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb375937341.

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Andriamihafy, Hérison. "Débitmétrie par diaphragme en écoulement pulsatoire : sources d'erreurs et corrections possibles, approche expérimentale et modélisation." Toulouse, ENSAE, 1987. http://www.theses.fr/1987ESAE0014.

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Guingand, Frédéric. "Etude des phénomènes hydro-acoustiques liés au régime pulsatoire du circuit haute pression d'une direction assistée hydraulique." Lyon, INSA, 2000. http://www.theses.fr/2000ISAL0024.

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L'interaction du débit pulsé généré par la pompe avec le circuit de direction de direction assistée produit des pulsation de pression (bruit hydaulique) qui sont transmises au circuit et aux structures d'accueil (bruit solidien), conduisant à du bruit aérien dans le véhicule. Actuellement, la mise au point de ce type de système, exclusiovement expérimentale et itérative, est coûteuse en moyens et en temps. La démarche mise en place dans le cadre de cette étude permet d'orienter la conception des circuits, de faciliter la mise au point expérimentale et de développer une méthodologie basée sur l
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Ben, Abdessalem Khaled. "Etude de l'écoulement pulsatile d'un fluide visqueux dans un milieu viscoélastique non linéaire et présentant deux sites de réflexion : application à l'écoulement du sang dans les artères." Paris 7, 2008. http://www.theses.fr/2008PA077212.

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La connaissance des grandeurs hémodynamiques du système cardio-vasculaire en relation avec les donnée pathologiques ou physiologiques, a été le sujet de nombreux travaux de recherches durant les dernières décennies. Le bi de cette thèse de doctorat été de promouvoir les possibilités d'investigation non intrusive du système artériel, lesquelle sont basées sur l'utilisation des techniques vélocimétriques et échographique ultrasonores. Nous avons développ différents méthodes qui permettent une quantification non-invasive des grandeurs hémodynamiques d'intérêt clinique dan un tronc artériel. Nous
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Bokov, Plamen. "Description expérimentale et numérique de l'interaction entre un stent biodégradable et la paroi artérielle." Paris 7, 2011. http://www.theses.fr/2011PA077109.

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Ce travail porte sur l'étude expérimentale et numérique de l'interaction entre un stent biodégradable et la paroi artérielle. Deux types de stents ont été explorés, un stent en acier inoxydable et un en polymère biodégradable le PLLA-PTT (copolymère de poly-L-acide lactique et de polytrimethylène terephtalate). En utilisant des simulations numériques 3D simplifiées, utilisant la notion de pression équivalente, nous montrons que le stent biodégradable est capable d'assurer une dilatation post-angioplastique de 7% de la lumière vasculaire initiale. Dans une partie expérimentale, nous montrons qu
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De, Assis Peralta Raphaël. "Caractériser les populations stellaires à l'aide d'indices sismiques." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066106/document.

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A l'instar de la sismologie terrestre, l'astérosismologie est l'étude des tremblements d'étoiles. Ces vibrations internes sont observées via les variations de luminosité (ou de vitesse) qui se manifestent à leurs surfaces. A partir de ces séries temporelles, on calcule les spectres de puissance qui contiennent une véritable mine d'informations. En particulier, pour les pulsateurs de types solaires, nous pouvons observer le signal de la granulation ainsi que les modes propres d'oscillations stellaires qui sont tous deux une conséquence directe de la convection dans l'enveloppe de l'étoile. L'as
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Tardu, Sedat. "Ecoulement turbulent instationnaire près d'une paroi : réponse des structures turbulentes : [thèse en partie soutenue sur un ensemble de travaux]." Grenoble 1, 1988. http://www.theses.fr/1988GRE10137.

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Books on the topic "Pulsatoria"

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Pogorilowski, Andrei. Energii ale timpului muzical: Studii esențiale de funcționalism pulsatoric. Ararat, 1994.

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1957-, Goupil M. J., Hansen Carl J, and United States. National Aeronautics and Space Administration., eds. On the role of resonances in nonradial pulsators. National Aeronautics and Space Administration, 1997.

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Varkey, Joseph Valliaara. The Pulsator. Raider Publishing International, 2007.

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Pogorilowski, Andrei. Energies of Musical Time - Essential Studies of Pulsatory Functionalism (English/Romanian). Editura Ararat, 1995.

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Book chapters on the topic "Pulsatoria"

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Salvi, Paolo. "La pressione pulsatoria." In Onde di polso. Springer Milan, 2012. http://dx.doi.org/10.1007/978-88-470-2424-3_3.

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Rivinius, Th. "Be Stars: Rapidly Rotating Pulsators." In Astrophysics and Space Science Proceedings. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-29630-7_46.

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Goodwin, Richard M. "The Economy as an Evolutionary Pulsator." In The Long-Wave Debate. Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-662-10351-7_4.

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Charpinet, S., G. Fontaine, and P. Brassard. "Fundamental Parameters of SDB Pulsators from Asteroseismology." In White Dwarfs. Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0215-8_18.

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O’Brien, M. Sean. "Old Pulsators: White Dwarfs and Their Immediate Precursors." In Asteroseismology Across the HR Diagram. Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0799-2_7.

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Baade, Dietrich, and Werner W. Weiss. "Computed Spectral Line Variations for Oblique Nonradial Pulsators." In Upper Main Sequence Stars with Anomalous Abundances. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4714-6_38.

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Kurtz, D. W. "Evidence for, and Development of, the Oblique Pulsator Model." In Variable Stars as Essential Astrophysical Tools. Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4299-1_13.

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Corbet, Robin H. D. "The Three Types of High Mass X-Ray Pulsator." In The Evolution of Galactic X-Ray Binaries. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4594-4_6.

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Ernst, Floris. "On the Outside: Prediction of Human Respiratory and Pulsatory Motion." In Compensating for Quasi-periodic Motion in Robotic Radiosurgery. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4614-1912-9_4.

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Billères, M., and G. Fontaine. "High Signal-to-Noise Ratio Observations of EC 14026 Pulsators." In White Dwarfs. Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0215-8_17.

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Conference papers on the topic "Pulsatoria"

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Kukhtarev, Nickolai V., Tatiana V. Kukhtareva, Mekonen Bayssie, et al. "Photogalvanic pulsator." In International Symposium on Optical Science and Technology, edited by Francis T. S. Yu and Ruyan Guo. SPIE, 2002. http://dx.doi.org/10.1117/12.452627.

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Reitschuster, Stefan, Thomas Tobie, and Karsten Stahl. "Operating Behavior and Performance of Polymer Gears in Pulsator Tests." In ASME 2024 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2024. http://dx.doi.org/10.1115/detc2024-141295.

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Abstract For designing gears reliable strength values are essential. The determination of strength values for the tooth root load-carrying capacity is usually based on experimental fatigue tests in a pulsator due to various advantages compared to back-to-back tests. In contrast to steel gears, it is currently unclear how polymer gears perform in the pulsator test and whether the pulsator test is suitable for determining the tooth root load-carrying capacity of such gears. Against this background, theoretical and experimental investigations on the operating behavior and fatigue life of POM gear
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Majdalani, Joseph, and Hicham Chibli. "Pulsatory Channel Flows with Arbitrary Pressure Gradients." In 3rd Theoretical Fluid Mechanics Meeting. American Institute of Aeronautics and Astronautics, 2002. http://dx.doi.org/10.2514/6.2002-2981.

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Wilson, Matthew, David Lineberry, and Marlow Moser. "Experimental Pulsator Characterization for Liquid Injector Research." In 46th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. American Institute of Aeronautics and Astronautics, 2010. http://dx.doi.org/10.2514/6.2010-7011.

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Bazarov, Vladimir, Erik Lee, David Lineberry, Bryant Swanner, and Robert Frederick. "Pulsator Designs for Liquid Rocket Injector Research." In 43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. American Institute of Aeronautics and Astronautics, 2007. http://dx.doi.org/10.2514/6.2007-5156.

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Wilson, Matthew, David Lineberry, and Marlow Moser. "Experimental Pulsator Characterization for Liquid Injector Research." In 45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. American Institute of Aeronautics and Astronautics, 2009. http://dx.doi.org/10.2514/6.2009-5491.

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Muntges, Daniel, and Joseph Majdalani. "Pulsatory Channel Flow for an Arbitrary Volumetric Flowrate." In 32nd AIAA Fluid Dynamics Conference and Exhibit. American Institute of Aeronautics and Astronautics, 2002. http://dx.doi.org/10.2514/6.2002-2856.

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Salmon, Sébastien, Josefina Montalbán, Andrea Miglio, et al. "The Enigma of B-type Pulsators in the SMC." In STELLAR PULSATION: CHALLENGES FOR THEORY AND OBSERVATION: Proceedings of the International Conference. AIP, 2009. http://dx.doi.org/10.1063/1.3246521.

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Hayes, Brandon, Austin Hayes, Matthew Rolleston, Alexander Ferreira, and James Krisher. "Pulsatory Mixing of Laminar Flow Using Bubble-Driven Micro-Pumps." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86937.

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Y-shaped microfluidic channels have been built with Computer Numerical Control (CNC) and laser cutting manufacturing techniques. Fluid is delivered to each port via external syringe pumps. Each Y-shaped channel contains thermal inkjet (TIJ) resistors built using conventional microfabrication techniques. The resistors vaporize water and generate drive bubbles. This work focuses on utilizing TIJ technology as an active mixing technique in microfluidics. By varying the electrical firing frequency of the resistors, fluid was successfully mixed with an effective mixing length equal to the length of
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Richter, Andreas, and Petr A. Nikrityuk. "Heat and fluid flow past spherical particles in pulsatory flows." In THMT-12. Proceedings of the Seventh International Symposium On Turbulence, Heat and Mass Transfer Palermo, Italy, 24-27 September, 2012. Begellhouse, 2012. http://dx.doi.org/10.1615/ichmt.2012.procsevintsympturbheattransfpal.540.

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