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Gotowa bibliografia na temat „Pulse tests”

Autor: Grafiati

Data publikacji: 2 czerwca 2025

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "Pulse tests"

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Ritt, Stefan Andreas, and Alastair F. Johnson. "Load Pulse Determination in Gas Gun Impact Tests." Applied Mechanics and Materials 7-8 (August 2007): 259–64. http://dx.doi.org/10.4028/www.scientific.net/amm.7-8.259.

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This paper is concerned with methods to determine the resultant impact load pulse on test structures during gas gun tests. The muzzle of a gas gun carries an instrumented target support designed to measure force-time-pulses of the impact event on structures mounted on the device. The target during impact is supported on two long slender metallic bars with axial strain gauges. By measuring the impact strain pulses in the support bars and assuming longitudinal wave propagation, it is possible to determine the impact load pulse on the target. The paper describes the strain measuring device and me

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Achour, Yahia, Jacek Starzyński, and Kazimierz Jakubiuk. "New Architecture of Solid-State High-Voltage Pulse Generators." Energies 15, no. 13 (2022): 4823. http://dx.doi.org/10.3390/en15134823.

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The application of the nanosecond pulsed electric field (nsPEF) for biomedical treatments has gained more interest in recent decades due to the development of pulsed power technologies which provides the ability to control the electric field dose applied during tests. In this context, the proposed paper describes a new architecture of solid-state high-voltage pulse generators (SS-HVPG) designed to generate fully customised sequences of quasi-rectangular pulses. The idea is based on the combination of semiconductor switches (IGBT/MOSFET) known for their flexibility and controllability with spec

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Novakowski, Kentner S. "Analysis of pulse interference tests." Water Resources Research 25, no. 11 (1989): 2377–87. http://dx.doi.org/10.1029/wr025i011p02377.

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Zhang, Huayi, and Yilin Tang. "A Fuzzy Controller for PFN Trigger Time Sequence in Electromagnetic Railgun System." Journal of Physics: Conference Series 2478, no. 8 (2023): 082015. http://dx.doi.org/10.1088/1742-6596/2478/8/082015.

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Abstract For the electromagnetic launch system, how to realize the wide pulse, fast rise, and small fluctuation of pulse forming network output current is a core problem. A trigger time sequence control method based on fuzzy theory for the pulse forming network is proposed in this paper. First, circuit models of pulse forming unit, pulse forming network, and electromagnetic rail launcher is established. Second, a fuzzy trigger time sequence controller model for pulse forming network is designed by using Simulink. Third, fixed time sequence discharge tests consisting of 20 pulsed forming units

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Li, Hongda, Bo Zhang, Sergey Sosnovskiy, et al. "Study of Bipolar Inductively Isolated High-Voltage Pulse Source." Electronics 12, no. 18 (2023): 3864. http://dx.doi.org/10.3390/electronics12183864.

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To meet the application requirements of pulsed power technology in wastewater treatment and other aspects (for example, a scenario that requires a high-voltage pulse source that can output a pulse with a rising edge in the nanosecond range and a device that can stabilize the pulse under high-frequency conditions), this paper designed an inductively isolated bipolar high-voltage pulse source. It consists of three parts: the primary charging power supply, the isolated driver circuit, and the pulse-forming circuit. By using inductance instead of traditional resistance isolation, using the inducta

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Liu, Zhi Xin, Yong Wan Shi, and Hong Chen. "Modeling and Analysis of Crash Pulse of Vehicle Body Based on Tipped Equivalent Square Wave Method." Advanced Materials Research 211-212 (February 2011): 1007–11. http://dx.doi.org/10.4028/www.scientific.net/amr.211-212.1007.

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Crash pulse is an important parameter that can directly reflect the process of vehicle crash. And it is found that there exists an interrelationship between crash pulses and injuries of occupants. In this paper, a method of crash pulse modeling named TESW was adopted to simplify the real crash pulse with several characteristic parameters and then 37 groups characteristic parameters were obtained from 37 crash pulses of full-scale frontal tests, subsequently correlation analysis of crash pulse of body and injury of occupant were performed. And several rules that how these characteristic paramet

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Hu, L., B. Gao, J. K. Lv, S. C. Sun, Y. Hao, and G. F. Tu. "Halo Evolution of Hypereutectic Al-17.5Si Alloy Treated with High-Current Pulsed Electron Beam." Journal of Nanomaterials 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/806151.

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Halo evolution of an Al-17.5Si alloy surface after treatment with increasing pulse numbers of a high-current pulsed electron beam (HCPEB) was investigated. A halo is a ring microstructure resembling a bull’s eye. SEM results indicate that the nanocrystallization of halo induced by HCPEB treatment leads to gradual diffusion of the Si phase. Multiple pulses numbers cause the Si phase to be significantly refined and uniformly distributed. In addition, nanosilicon particles with a grain size of 30~100 nm were formed after HCPEB treatment, as shown by TEM observation. XRD results indicate that Si d

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Al-Zuhairi, Ala’a Hussein Alwan. "Estimation of Flexural Strength of Plain Concrete from Ultrasonic Pulse Velocity." Journal of Engineering 19, no. 2 (2023): 197–206. http://dx.doi.org/10.31026/j.eng.2013.02.03.

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The aim of this study is to propose mathematical expressions for estimation of the flexural strength of plain concrete members from ultrasonic pulse velocity (UPV) measurements. More than two hundredpieces of precast concrete kerb units were subjected to a scheduled test program. The tests were divided into two categories; non-destructive ultrasonic and bending or rupture tests. For each precast unit, direct and indirect (surface) ultrasonic pulses were subjected to the concrete media to measure their travel velocities. The results of the tests were mointered in two graphs so that two mathemat

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Li, Lin, Yuhua Cao, Tiantian Fen, and Chang Lv. "Effect of Single and Double Pulse MIG Welding Process Parameters on Microstructure and Properties of Aluminium Alloy." Journal of Physics: Conference Series 2390, no. 1 (2022): 012004. http://dx.doi.org/10.1088/1742-6596/2390/1/012004.

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Abstract Lightweight aluminium alloys are widely used in many industries due to their advantageous mechanical properties. As welding is a popular method for joining aluminium alloy sheets, it is important to understand how the welding process affects the alloy’s performance. Here, we investigated the influence of various operating parameters during pulsed metal inert gas (MIG) welding of thin aluminium alloy plates on the input energy and metallurgical microstructure of the weld. A series of welding tests were performed using surface welding of AA6061 aluminium alloy plates under conditions of

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Takahashi, Masayuki, and Naofumi Ohnishi. "Theoretical and Numerical Studies of Dynamic Scaling of a Six-Degree-of-Freedom Laser Propulsion Vehicle." International Journal of Aerospace Engineering 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/801371.

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To estimate the flight reactions of a full-scale vehicle from reduced-scale tests, we constructed a scaling theory for the vehicle size, input energy, moment of inertia, and pulse frequency needed to maintain dynamic equivalence between a laboratory-scale and full-scale launch of a laser propulsion vehicle. The dynamic scaling law for a single pulse was constructed using translational and angular equations of motion. The analytical scaling was confirmed for a single-pulse incident using a fluid-orbit coupling simulator for the interaction between the blast wave and the vehicle. Motion equivale

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Rozprawy doktorskie na temat "Pulse tests"

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Arroyo, Marcos. "Pulse tests in soil samples." Thesis, University of Bristol, 2001. http://hdl.handle.net/1983/25e7e542-94f3-49f3-ba6f-36df35f5e0e2.

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Navidpour, Mansour. "Shake table tests for pulse-generated active-seismic control of frame structure." Thesis, University of Ottawa (Canada), 2007. http://hdl.handle.net/10393/27949.

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The majority of the existing infrastructure, designed prior to the enactment of modern seismic codes, is seismically deficient. Because it is not feasible to replace the entire inventory of seismically deficient infrastructure with new and seismically designed infrastructure, retrofitting remains to be the only viable option for seismic risk mitigation. Therefore, there has been significant research on the development of seismic retrofit technologies. The research project reported in this thesis is an effort towards developing a new seismic retrofit technique that utilizes pulse-based active f

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Rousseau, Charle Werner. "Establishing a cost effective method to quantify and predict the stability of solid rocket motors using pulse tests." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6793.

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Norgard, Peter. "Development of a gigawatt repetitive pulse modulator and high-pressure switch test stand and results from high-pressure switch tests." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4584.

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Thesis (M.S.)--University of Missouri-Columbia, 2006.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on April 22, 2009) Includes bibliographical references.

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Florea, Elena V. "Prediction of clinical events in elderly using sensor data a case study on pulse pressure /." Diss., Columbia, Mo. : University of Missouri-Columbia, 2009. http://hdl.handle.net/10355/6588.

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Thesis (M.S.)--University of Missouri-Columbia, 2009.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. "May 2009" Includes bibliographical references.

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Behrens, Anders. "Measurements in Idiopathic Normal Pressure Hydrocephalus : Computerized neuropsychological test battery and intracranial pulse waves." Doctoral thesis, Umeå universitet, Klinisk neurovetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-96195.

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Idiopathic Normal Pressure Hydrocephalus (INPH) is a condition affecting gait, cognition and continence. Radiological examination reveals enlarged ventricles of the brain. A shunt that drains CSF from the ventricles to the abdomen often improves the symptoms. Much research on INPH has been focused on identifying tests that predict the outcome after shunt surgery. As part of this quest, there are attempts to find measurement methods of intracranial parameters that are valid, reliable, tolerable and safe for patients. Today's technologies for intracranial pressure (ICP) measurement are invasive,

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Qvarlander, Sara. "Analysis of ICP pulsatility and CSF dynamics : the pulsatility curve and effects of postural changes, with implications for idiopathic normal pressure hydrocephalus." Doctoral thesis, Umeå universitet, Radiofysik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-82784.

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The volume defined by the rigid cranium is shared by the brain, blood and cerebrospinal fluid (CSF). With every heartbeat the arterial blood volume briefly increases and venous blood and CSF are forced out of the cranium, leading to pulsatility in CSF flow and intracranial pressure (ICP). Altered CSF pulsatility has been linked to idiopathic normal pressure hydrocephalus (INPH), which involves enlarged cerebral ventricles and symptoms of gait/balance disturbance, cognitive decline and urinary incontinence that may be improved by implantation of a shunt. The overall aim of this thesis was to in

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Chies, Josué Argenta. "Ensaios não destrutivos em concreto : detecção de falhas no interior de estruturas de concreto com o uso de ultrassom." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/127927.

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A aplicação de Ensaios Não Destrutivos (END) é considerada uma alternativa para monitorar o estado das estruturas de concreto armado, principalmente quando ocorrem falhas de projeto, erros de dosagem, problemas na mistura, transporte ou lançamento do concreto. A medida da Velocidade de Pulso Ultrassônico (VPU) é um END que vem sendo usado comumente em diversas áreas da engenharia civil, devido à facilidade da operação, ao seu baixo custo, à rapidez na execução dos testes e à ausência de danos ao material analisado. O objetivo deste trabalho consiste em apresentar o resultado de uma pesquisa ex

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Abrão, Carmen Vianna. ""A oximetria de pulso como recurso auxiliar na determinação da vitalidade pulpar de dentes permanentes traumatizados"." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/23/23145/tde-20092006-092828/.

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A verificação da vitalidade pulpar depende de recursos semiotécnicos específicos, e, entre eles, os mais comumente empregados são os testes térmicos e elétrico. Tais testes apresentam limitações clínicas que interferem na análise e interpretação dos dados obtidos pelos mesmos. Os testes de sensibilidade são estímulos de origem térmica, elétrica ou mecânica aplicáveis ao dente e que são transmitidos às fibras nervosas sensitivas pulpares. Portanto, não leva em consideração a atividade circulatória do tecido pulpar e as condições de oxigenação, que são os reais indicadores da vitalidade do tecid

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Alwash, Maitham Fadhil Abbas. "Assessment of concrete strength in existing structures using nondestructive tests and cores : analysis of current methodology and recommendations for more reliable assessment." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0587/document.

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Pour évaluer la résistance mécanique du béton dans un ouvrage existant, la méthodologie courante combine des mesures non destructives (CND) comme le rebond ou/et la vitesse des ondes ultrasoniques avec la technique destructive (carottes) afin de produire une relation‘‘modèle de conversion” entre la résistance mécanique et les mesures CND. Le modèle de conversion est utilisé pour estimer la valeur locale de résistance mécanique à chaque emplacement de test en utilisant la valeur CND correspondante. Ensuite, on calcule les estimations de la résistance moyenne et/ou de l’écart-type de la résistan

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Książki na temat "Pulse tests"

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E, Bowers Glen, and United States. National Aeronautics and Space Administration., eds. Power electronics for a miniaturized arcjet. National Aeronautics and Space Administration, 1997.

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Jet Propulsion Laboratory (U.S.), ed. The large area pulsed solar simulator. National Aeronautics and Space Administration, Jet Propulsion Laboratory, California Institute of Technology, 1994.

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United States. National Aeronautics and Space Administration., ed. PPT thrust stand. National Aeronautics and Space Administration, 1995.

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United States. National Aeronautics and Space Administration., ed. PPT thrust stand. National Aeronautics and Space Administration, 1995.

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Center, NASA Glenn Research, ed. Acousto-ultrasonics to assess material and structural properties. National Aeronautics and Space Administration, Glenn Research Center, 2002.

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Center, NASA Glenn Research, ed. Acousto-ultrasonics to assess material and structural properties. National Aeronautics and Space Administration, Glenn Research Center, 2002.

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Center, NASA Glenn Research, ed. Acousto-ultrasonics to assess material and structural properties. National Aeronautics and Space Administration, Glenn Research Center, 2002.

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H, Johari, and United States. National Aeronautics and Space Administration., eds. Delta wing vortex manipulation using pulsed and steady blowing during ramp pitching. Mechanical Engineering Dept., Worcester Polytechnic Institute, 1995.

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Ivanovs, Aleksandrs. Smol̦enskas - Rīgas aktis 13. gs.-14. gs. pirmā puse: Kompleksa Moscowitica - Ruthenica dokumenti par Smol̦enskas un Rīgas attiecībām. Latvijas Valsts vēstures arhīvs, 2009.

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United States. National Aeronautics and Space Administration., ed. Analysis of technology for solid state coherent lidar: Contract no. NAS8-38609 ... contract period: September 20, 1996 - June 30, 1997. National Aeronautics and Space Administration, 1997.

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Części książek na temat "Pulse tests"

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Ershaghi, Iraj. "Pulse and Interference Tests." In Solved Problems in Well Testing. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-47299-2_9.

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O'Connell, Dennis G., Janelle K. O'Connell, and Martha R. Hinman. "Pulse Pressure." In Special Tests of the Cardiopulmonary, Vascular, and Gastrointestinal Systems. CRC Press, 2024. http://dx.doi.org/10.1201/9781003526506-7.

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Scheidler, Mike, John Fitzpatrick, and Reuben Kraft. "Optimal Pulse Shapes for SHPB Tests on Soft Materials." In Dynamic Behavior of Materials, Volume 1. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4614-0216-9_37.

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Foster, John T., and Erik E. Nishida. "A Priori Pulse Shaper Design for Constant-Strain-Rate Tests of Elastic-Brittle Materials." In Dynamic Behavior of Materials, Volume 1. Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-4238-7_49.

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Saretta, Ylenia, Filippo Casarin, and Maria Rosa Valluzzi. "An Update of Sonic Pulse Velocity Tests on Heritage Buildings: Correlation with Masonry Types." In RILEM Bookseries. Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-39603-8_53.

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Weik, Martin H. "pulse test." In Computer Science and Communications Dictionary. Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_15121.

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Załęgowski, Kamil, and Maja Kępniak. "Effect of Polymer Mortar Modification Using Eco-friendly Biochar on Microstructure." In Springer Proceedings in Materials. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-72955-3_24.

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AbstractThe construction sector should have much to offer in terms of helping to achieve circular economy goals, among others the use of waste materials. The example of such materials is biochar, a black porous and carbon-rich matter that could be converted from various waste biomass. A biochar could be utilized as microfiller in polymer concretes. This application of biochar is promising due to good interfacial bonding with polymer, no reactivity between surrounding polymer matrix and filler particles and fact that even fillers with irregular particles and large specific surface area could be

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Cescatti, Elvis, Luca Rosato, Maria Rosa Valluzzi, and Filippo Casarin. "An Automatic Algorithm for the Execution and Elaboration of Sonic Pulse Velocity Tests in Direct and Tomographic Arrangements." In RILEM Bookseries. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-99441-3_77.

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Weik, Martin H. "shuttle-pulse test." In Computer Science and Communications Dictionary. Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_17301.

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Bäuerle, Dieter. "Ultrashort-Pulse Laser Ablation." In Advanced Texts in Physics. Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-662-04074-4_13.

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Streszczenia konferencji na temat "Pulse tests"

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Pellettiere, Joseph, and Amanda Taylor. "Anthropomorphic Test Device Response in Vertical Drop Tests and Sled Tests." In Vertical Flight Society 74th Annual Forum & Technology Display. The Vertical Flight Society, 2018. http://dx.doi.org/10.4050/f-0074-2018-12735.

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The Federal Aviation Administration has regulations designed to protect aircraft occupants in the event of a crash. Two-drop tests of a Fokker 28 (F-28) small regional jet airframe performed at the National Aeronautics and Space Agency provided full-scale crash data on the performance of transport category aircraft seating systems. The crash pulse measured at the floor differed from the certification tests and the performance of the seats did as well. To assess injuries in the spinal column, lumbar loads were collected for all Anthropomorphic Test Devices, and a range of occupants was included

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Borlino, M. Cappio, E. Giorio, and V. Squizzato. "Tests of Immunity to GSM Pulse Modulation." In 11th International Zurich Symposium and Technical Exhibition on Electromagnetic Compatibility. IEEE, 1995. https://doi.org/10.23919/emc.1995.10784305.

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Millard, S. G., K. R. Gowers, and J. H. Bungey. "Galvanostatic Pulse Techniques: a Rapid Method of Assessing Corrosion Rates of Steel in Concrete Structures." In CORROSION 1995. NACE International, 1995. https://doi.org/10.5006/c1995-95525.

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Abstract Instrumentation has been developed for rapid data acquisition and processing of the potential transient response to a galvanostatic pulse. This has been designed to be employed as a site method for the corrosion evaluation of steel reinforcement in concrete structures. Details of the technique are presented, together with experimental results from electronic circuits, test solutions, and specimens of steel in concrete. Results obtained were comparable with those from AC impedance tests, but the galvanostatic pulse technique gave better resolution of time constants, and the measurement

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Ji, Yatai, Paolo Giangrande, Pinjia Zhang, et al. "On the Effect of Pulse Voltage Frequency During Insulation Electrical Endurance Tests at 200 Mbar Pressure." In 2025 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD). IEEE, 2025. https://doi.org/10.1109/wemdcd61816.2025.11014147.

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Richards, Marvin. "Predicted Performance of an Optimized Energy-Absorbing Crashworthy Seat During Idealized and Actual Crash Pulses." In Vertical Flight Society 70th Annual Forum & Technology Display. The Vertical Flight Society, 2014. http://dx.doi.org/10.4050/f-0070-2014-9481.

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Advanced computer simulation was utilized to optimize a generic vertical-load-limiting seat's energy absorber (EA) load-stroke profile to achieve acceptable lumbar axial compressive loads for a 50th percentile anthropomorphic test device (ATD) when exposed to standard military triangular test pulses. The optimized EA profiles included a constant-load type, a progressive-ramp-load type, and a progressive-step-load type. Measured accelerations from three full-scale rotorcraft crash tests were then input to the computer simulation to evaluate the three optimized EA profiles. The modeling showed t

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Lim, Yow-Luen, Shu-You Lian, Yuan-Chih Chang, Tsai-Sheng Lin, and Tzu Shiang Sun. "Design and Simulation of Double Pulse Tests for Si IGBT/SiC MOSFET Hybrid Switch Power Module Applied to Electric Vehicles." In 2024 19th International Microsystems, Packaging, Assembly and Circuits Technology Conference (IMPACT). IEEE, 2024. https://doi.org/10.1109/impact63555.2024.10818960.

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Weidinger, David M., Louis Ge, and Richard W. Stephenson. "Ultrasonic Pulse Velocity Tests on Compacted Soil." In GeoHunan International Conference 2009. American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41041(348)22.

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Stuban, Norbert. "Operational tests of a wireless fetal pulse oximeter." In 2013 36th International Spring Seminar on Electronics Technology (ISSE). IEEE, 2013. http://dx.doi.org/10.1109/isse.2013.6648277.

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NISHII, S., K. FUKUDA, and N. KUBOTA. "Combustion tests of two-stage pulse rocket motors." In 25th Joint Propulsion Conference. American Institute of Aeronautics and Astronautics, 1989. http://dx.doi.org/10.2514/6.1989-2426.

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Park, Chung-Kyu, Eun-Young Kim, and Cing-Dao (Steve) Kan. "Investigation of Vehicle Crash Pulse Severity Using Frontal New Car Assessment Program (NCAP) Test Data." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-66401.

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The severity of vehicle crash pulses of the frontal New Car Assessment Program (NCAP) tests is evaluated by existing metrics. The existing metrics can be categorized into four groups: metrics based on vehicle crash pulse only, metrics based on vehicle crash pulse with assumed occupant response, metrics based on vehicle crash pulse with actual occupant responses, and combined metrics. The paper discusses their evaluation results of frontal NCAP test data and their assessability of the crash pulse severity.

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Raporty organizacyjne na temat "Pulse tests"

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Meyer, Perry A., Judith A. Bamberger, Carl W. Enderlin, et al. Pulse Jet Mixing Tests With Noncohesive Solids. Office of Scientific and Technical Information (OSTI), 2009. http://dx.doi.org/10.2172/956900.

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Meyer, Perry A., Judith A. Bamberger, Carl W. Enderlin, et al. Pulse Jet Mixing Tests With Noncohesive Solids. Office of Scientific and Technical Information (OSTI), 2012. http://dx.doi.org/10.2172/1036077.

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Felch, K., C. Hess, H. Huey, et al. Recent long-pulse and high-average-power tests on a 140 GHz gyrotron. Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/6541575.

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Webber, R. C. Report on booster high pulse repetition rate operation tests conducted on March 29, 1998. Office of Scientific and Technical Information (OSTI), 1999. http://dx.doi.org/10.2172/5495.

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Meyer, Perry A., Ellen BK Baer, Judith A. Bamberger, James A. Fort, and Michael J. Minette. Assessment of Differences in Phase 1 and Phase 2 Test Observations for Waste Treatment Plant Pulse Jet Mixer Tests with Non-Cohesive Solids. Office of Scientific and Technical Information (OSTI), 2010. http://dx.doi.org/10.2172/992015.

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Galindo, Arturo, and Jorge Tovar. Policy Support and Firm Performance During the COVID-19 Pandemic: Evidence from Colombia. Inter-American Development Bank, 2022. http://dx.doi.org/10.18235/0004622.

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The pandemic hit the Colombian economy as hard as other countries. Using a novel Business Pulse Survey, this paper tests the effect of government support and COVID-19 cases on firms performance. A one-standard-deviation increase in government support (in periods in which the pandemics intensity was average) increased the percentage of firms reporting normal operations by 4.8 percent. Political demonstrations in spring 2021, however, reduced the percentage by 13 percent each month they lasted. Firms' financial distress also counters the impact of government support, suggesting the need to ease

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Al-Qadi, Imad, Hasan Ozer, Aravind Ramakrishnan, and Ashraf Alrajhi. Pavement Distresses Due to Truck Platoons: A Holistic Analysis. Illinois Center for Transportation, 2023. http://dx.doi.org/10.36501/0197-9191/23-015.

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Currently, AASHTOWare PMED does not contain a framework to compute distresses for loading scenarios like truck platoons. Truck platoons reduce fuel consumption and improve safety while increasing pavement damage because of a reduction in wander and rest period. The important parameters of truck platoons are wander, rest period, and penetration level. Unlike wander, the effect of reduced rest period on permanent deformation and platoon penetration level are not well documented. Rest period (i.e., truck spacing) is a critical parameter in platoons that can be controlled to reduce damage or to im

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Hawley. PR-015-11707-R01 Test Diagnostic Methods for Turbine Gas Meters. Pipeline Research Council International, Inc. (PRCI), 2013. http://dx.doi.org/10.55274/r0010671.

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Similar to most metering technologies, turbine meters are known to be affected by abnormal flow or abnormal mechanical conditions which can cause bias in flow measurement. These types of flow conditions include blockage at the flow meter or straightening vanes, grime or liquid contamination on the internal meter components, damage to the internal meter components, and pulsation in the flow. With the introduction of ultrasonic and Coriolis meters for gas applications, the natural gas industry has embraced the concept of meters with embedded diagnostic capabilities. These capabilities allow the

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Huatian, Xu, and Bi Wuxi. PR469-183600-R01 The Influence of Solid State Decouplers on Pipeline CP Surveys. Pipeline Research Council International, Inc. (PRCI), 2020. http://dx.doi.org/10.55274/r0011935.

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The objectives of this research are to figure out how solid state decouplers (SSDs) influence the surveys related to pipeline cathodic protection (CP) and provide corresponding field guidelines on how to mitigate the adverse effects of SSDs. Firstly, by combining the classical capacitor discharge theory and the equivalent circuit of the CP system, a four-stage physical model is built to explain how SSDs' discharge current pulse influences the CP related readings. From the physical model, we can obtain the following conclusions: (1) The driving force behind the discharging of an SSD's capacitor

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Dethlefsen, R. Design concepts for a pulse power test facility to simulate EMP surges. Part II. Slow pulses. Office of Scientific and Technical Information (OSTI), 1985. http://dx.doi.org/10.2172/6280383.

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