Academic literature on the topic 'Overdrive mechanism'

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Journal articles on the topic "Overdrive mechanism"

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Chechekhin, Vadim, Anastasia Ivanova, Konstantin Kulebyakin, et al. "Alpha1A- and Beta3-Adrenoceptors Interplay in Adipose Multipotent Mesenchymal Stromal Cells: A Novel Mechanism of Obesity-Driven Hypertension." Cells 12, no. 4 (2023): 585. http://dx.doi.org/10.3390/cells12040585.

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Hypertension is a major risk factor for cardiovascular diseases, such as strokes and myocardial infarctions. Nearly 70% of hypertension onsets in adults can be attributed to obesity, primarily due to sympathetic overdrive and the dysregulated renin-angiotensin system. Sympathetic overdrive increases vasoconstriction via α1-adrenoceptor activation on vascular cells. Despite the fact that a sympathetic outflow increases in individuals with obesity, as a rule, there is a cohort of patients with obesity who do not develop hypertension. In this study, we investigated how adrenoceptors’ expression a
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Kunysz, A. M., A. Shrier, and L. Glass. "Bursting behavior during fixed-delay stimulation of spontaneously beating chick heart cell aggregates." American Journal of Physiology-Cell Physiology 273, no. 1 (1997): C331—C346. http://dx.doi.org/10.1152/ajpcell.1997.273.1.c331.

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Spontaneously beating embryonic chick atrial heart cell aggregates were stimulated with depolarizing current pulses delivered at a fixed delay after each action potential. This preparation is an experimental model of a reentrant tachycardia. During fixed-delay stimulation, bursting behavior was typically observed for a wide range of delays. Episodes of bursting at a rate faster (slower) than control were followed by overdrive suppression (underdrive acceleration). We use a simple nonlinear model, based on the interaction between excitability and overdrive suppression, to describe these dynamic
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Arnar, David O., Dezhi Xing, and James B. Martins. "Overdrive pacing of early ischemic ventricular tachycardia: evidence for both reentry and triggered activity." American Journal of Physiology-Heart and Circulatory Physiology 288, no. 3 (2005): H1124—H1130. http://dx.doi.org/10.1152/ajpheart.01162.2003.

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Entrainment can be a useful method to identify reentry as a mechanism of ventricular tachycardia (VT). In this study, we evaluated the effect of gradually decreasing cycle lengths of overdrive pacing for stable VT induced in a canine model 1–3 h after coronary occlusion. Intact dogs underwent anterior descending coronary artery occlusion after instrumentation of the risk zone with 21 multipolar plunge needles, each recording 6 bipolar electrograms. Overdrive pacing was attempted if the animals had sustained hemodynamically stable VT, looking for evidence of entrainment. Subsequent three-dimens
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Kedar, Pimparkar. "AUTOMATIC KINEMATIC LINKAGE TRANSMISSION USING OVERDRIVE." International Journal of Advances In Scientific Research and Engineering (IJASRE) 3, no. 4 (2017): 145–49. https://doi.org/10.5281/zenodo.583839.

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<em>In this paper we have tried to explain combined use of lesteran’s concept of automatic transmission and overdrive mechanism. In lesteran’s concept he replaced gearbox with automatic mechanical torque convertor assembly. While overdrive consists of an electrically or hydraulically operated </em><em>epicycle gear</em><em> train bolted behind the </em><em>transmission</em><em> unit which allows the engine to operate at a lower RPM for a given road speed. This allows the vehicle to achieve better fuel efficiency, and often quieter operation on the highway</em>
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Mohanan Nair, Krishna Kumar, Narayanan Namboodiri, Hiren Kevadiya, and Ajitkumar Valaparambil. "Atrial overdrive pacing during LBBB tachycardia: What is the mechanism?" Pacing and Clinical Electrophysiology 41, no. 4 (2018): 411–13. http://dx.doi.org/10.1111/pace.13302.

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Gorev, M. V., Sh G. Nardaia та F. G. Rzaev. "Pacing maneuvers for supraventricular tachycardia differential diagnosis: ventricular overdrive pacing". Journal of Arrhythmology 29, № 3 (2022): 54–70. http://dx.doi.org/10.35336/va-2022-3-08.

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The accurate tachycardia mechanism verification is the most important condition for high effectiveness and safety of the supraventricular tachycardia ablation. Ventricular overdrive pacing - is a simple and useful diagnostic maneuver, frequently used in the supraventricular tachycardia diagnosis. The conditions for its performance and interpretation in the standard and rare situations are described in this review.
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Ye, Hui, Zhi Fang, Prabhakar Tamirisa, Gaurav Jain, and Erik Scott. "(Digital Presentation) Thermal Acceleration Model for the Capacity Fade of a Rechargeable Li Ion Battery and Its Validation with 10+ Years of Testing Data." ECS Meeting Abstracts MA2022-01, no. 2 (2022): 388. http://dx.doi.org/10.1149/ma2022-012388mtgabs.

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Rechargeable Li ion batteries have become not only a major power source for consumer electronics, but also a critical power source for high demanding applications like electrical vehicles, portable military devices and medical devices. Medtronic, one of the leading medical device companies has developed a breakthrough rechargeable Li ion battery technology-OverdriveTM to power implantable neurostimulators such as Intellis and Interstim Micro. OverdriveTM batteries have exceptional stable performance and fast charging capability. Figure 1 shows design verification test of capacity stability und
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Greenberg, Yisachar J., and Mario Vassalle. "On the mechanism of overdrive suppression in the guinea pig sinoatrial node." Journal of Electrocardiology 23, no. 1 (1990): 53–67. http://dx.doi.org/10.1016/0022-0736(90)90151-q.

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Grace, Anthony A., and Daniela L. Uliana. "Insights into the Mechanism of Action of Antipsychotic Drugs Derived from Animal Models: Standard of Care versus Novel Targets." International Journal of Molecular Sciences 24, no. 15 (2023): 12374. http://dx.doi.org/10.3390/ijms241512374.

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Therapeutic intervention for schizophrenia relies on blockade of dopamine D2 receptors in the associative striatum; however, there is little evidence for baseline overdrive of the dopamine system. Instead, the dopamine system is in a hyper-responsive state due to excessive drive by the hippocampus. This causes more dopamine neurons to be in a spontaneously active, hyper-responsive state. Antipsychotic drugs alleviate this by causing depolarization block, or excessive depolarization-induced dopamine neuron inactivation. Indeed, both first- and second-generation antipsychotic drugs cause depolar
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CLAVIN, PAUL, and FORMAN A. WILLIAMS. "Multidimensional stability analysis of gaseous detonations near Chapman–Jouguet conditions for small heat release." Journal of Fluid Mechanics 624 (April 10, 2009): 125–50. http://dx.doi.org/10.1017/s0022112008005387.

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Multidimensional instability of planar detonations, leading to cellular structures, is studied analytically near Chapman–Jouguet conditions, in the limit of small heat release, with small (Newtonian) differences between heat capacities, by using an expansion in a small parameter representing the ratio of the heat release to the thermal enthalpy of the fresh mixture. In this limit, the dynamics of detonations is governed by the interaction between the acoustic waves and the heat-release rate inside the inner detonation structure, the entropy–vorticity wave playing a negligible role at leading o
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Book chapters on the topic "Overdrive mechanism"

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Blomström-Lundqvist, Carina. "Introduction." In ESC CardioMed. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780198784906.003.0475.

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Supraventricular arrhythmias encompass atrial premature beats, supraventricular tachycardias (SVTs), and atrial fibrillation. SVT is used to describe tachycardias in which the mechanism involves tissue from the His bundle or above, thus including atrial tachycardias, atrioventricular nodal reentrant tachycardia, and atrioventricular reentrant tachycardia due to accessory pathways. Atrial fibrillation is not included among the SVTs and is described elsewhere. The term tachycardia refers to atrial and/or ventricular rates greater than 100 beats per minute at rest. Atrial premature beats, the mos
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Tsarouchas, Nick. "Clinical Neurophysiology of Epileptogenic Networks." In Neurophysiology - Networks, Plasticity, Pathophysiology, and Behavior [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.104952.

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Current theories and models of brain rhythm generation are based on (1) the excitability of individual neurons and whole networks, (2) the structural and functional connectivity of neuronal ensembles, (3) the dynamic interaction of excitatory and inhibitory network components, and (4) the importance of transient local and global states. From the interplay of the above, systemic network properties arise which account for activity overdrive or suppression, and critical-level synchronization. Under certain conditions or states, small-to-large scale neuronal networks can be entrained into excessiv
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Conference papers on the topic "Overdrive mechanism"

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Lian, Jinkang, Chang Liu, Yiqiang Chen, and Xiuyin Zhang. "Degration Behavior and Mechanism Analysis of AlGaN/GaN HEMTs After RF Overdrive Stress." In 2024 IEEE 10th International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications (MAPE). IEEE, 2024. https://doi.org/10.1109/mape62875.2024.10813782.

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Ang, Ghim Boon, Alfred Quah, Changqing Chen, et al. "Device Characterization Using AFP Nanoprobing for the Localization of New Product Design Weakness." In ISTFA 2013. ASM International, 2013. http://dx.doi.org/10.31399/asm.cp.istfa2013p0213.

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Abstract This paper illustrated the beauty of AFP nano-probing as the critical failure analysis tool in localizing new product design weakness. A 40nm case of HTOL Pin Leakage due to Source/Drain punch-through at a systematic location was discussed. The root cause and mechanism was due to VDS overdrive testing issue. This paper placed a strong emphasis on systematic problem solving approach, deep dive and use of right FA approach/tool that are essentially critical to FA analysts in wafer foundry since there is always minimal available data provided. It would serve as a good reference to wafer
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Yerlikaya, Ümit, and R. Tuna Balkan. "Dynamic Modeling and Control of an Electromechanical Control Actuation System." In ASME 2017 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/dscc2017-5056.

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Electromechanical actuators are widely used in miscellaneous applications in engineering such as aircrafts, missiles, etc. due to their momentary overdrive capability, long-term storability, and low quiescent power/low maintenance characteristics. This work focuses on electromechanical control actuation systems (CAS) that are composed of a brushless direct current motor, ball screw, and lever mechanism. In this type of CAS, nonlinearity and asymmetry occur due to the lever mechanism itself, saturation limits, Coulomb friction, backlash, and initial mounting position of lever mechanism. In this
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Bulat, P. V., N. B. Fedosenko, and V. V. Upyrev. "ON THE MECHANISM FOR MAINTAINING AN OVERDRIVEN DETONATION IN A ROTATING DETONATION ENGINE." In 8TH INTERNATIONAL SYMPOSIUM ON NONEQUILIBRIUM PROCESSES, PLASMA, COMBUSTION, AND ATMOSPHERIC PHENOMENA. TORUS PRESS, 2020. http://dx.doi.org/10.30826/nepcap2018-2-26.

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At present, virtually all jet engines are based on the Brighton thermodynamic cycle (combustion at constant pressure). The improvement of such engines has already reached its technological limit. A significant increase in the efficiency of jet engines (by 20%-25%) can be provided by a transition to the Fickett-Jacobs[4] thermodynamic cycle which uses detonation combustion. One possible realization is a rotating detonation engine (RDE) in which the combustion chamber is the space between two coaxial cylinders. In an ideal scheme, a fuel mixture is supplied from one end which is ignited by a sho
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Offermanns, Stefan, Eberhard Roos, and Werner Stadtmu¨ller. "Structural Response of Thin-Walled Austenitic Pipes to Internal Gaseous Detonation Loading." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63352.

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One of the main risks with the occurrence or by the use of hydrogen in oxygen-containing environment is the easy ignitability of the gas-mixture. An example of unwanted aggregations of such a gas-mixture is the generation of gaseous hydrogen and oxygen in safety-relevant piping of nuclear power plants due to radiolysis. Radiolysis is the dissociation of water under the influence of gamma and neutron radiation. Within the scope of a research project funded by the German Federal Ministry of Economics and Technology (BMWi), the assessment of incident situations with appearance and ignition of dif
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Offermanns, Stefan, and Stefan Weihe. "Deformation and Failure Mechanisms of Austenitic Piping Under the Influence of Oxyhydrogen Reactions." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-66692.

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The present paper deals with the deformation and failure mechanisms of austenitic piping under the influence of oxyhydrogen reactions for the safety evaluation of incident scenarios in technical installations based on previous work of the author [1–5]. For the characterization of the processes, detonation tests performed at the Materials Testing Institute University of Stuttgart (MPA Stuttgart) have been used. The aim of these experiments was to study the detonation processes in head spray cooling piping of boiling water reactors. The experiments were performed on austenitic pipes with an oute
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Browne, Vance D. "Metal Belt CVT’s: Performance Parameters." In ASME 2000 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/detc2000/ptg-14404.

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Abstract Automotive applications of CVT’s using metal belts are continuing to grow. There has been a significant amount of work in the detailed mechanics for these CVT’s. This CVT technology may be extended into non-automotive areas, which have different size, torque, ratio and speed requirements than automotive applications. The purpose of this paper is to explore the basic performance parameters for the metal belt CVT outside the automotive envelope and to present a design procedure for an initial estimate of torque capacity. This may then be used for preliminary functional feasibility evalu
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Reports on the topic "Overdrive mechanism"

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Tasker, Douglas George. Multipoint / Overdrive: Synergized Initiation Mechanisms. Office of Scientific and Technical Information (OSTI), 2017. http://dx.doi.org/10.2172/1351219.

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