Relevant bibliographies by topics / Pressure Loop

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Pressure Loop'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Pressure Loop"

1

Foëx, P., C. M. Francis, G. R. Cutfield, and B. Leone. "The Pressure—Length Loop." British Journal of Anaesthesia 60 (1988): 65S—71S. http://dx.doi.org/10.1093/bja/60.suppl_1.65s.

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Gordon, PA, JM Norton, JM Guerra, and ST Perdue. "Positioning of chest tubes: effects on pressure and drainage." American Journal of Critical Care 6, no. 1 (January 1, 1997): 33–38. http://dx.doi.org/10.4037/ajcc1997.6.1.33.

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BACKGROUND: Maintaining a chest drainage tube in a position that is free of dependent loops, as is commonly recommended, can be very difficult. Is there a beneficial effect on the patient's outcome when the drainage tubing is free of dependent loops? OBJECTIVE: The purpose of this study was to determine, under controlled laboratory conditions, (1) what are the differences in drainage with tubing in straight, coiled, or dependent-loop (with and without periodic lifting) positions and (2) what are the differences in pressure with each of the four tubing conditions? METHODS: In laboratory simulations, pressure and drainage were observed in a chest tube drainage system that was connected to a glass bottle simulating the lung. Pressure and drainage were measured for 1 hour with the drainage tubing placed in straight, coiled, and dependent-loop positions. For the periodic lifting condition, the dependent loop was lifted and drained every 15 minutes. RESULTS: We found no differences in pressure or drainage between straight and coiled positions of the drainage tubing. However, with the dependent-loop position, pressure at the "lung" side increased from about -18 cm H2O to as high as +8 cm H2O. Drainage dropped to zero without tube lifting. When the tube was lifted and drained every 15 minutes, there was no difference in drainage with the tubing in the straight or coiled positions. CONCLUSION: Findings support recommendations to maintain tubing free of dependent loops by placing tubing in straight or coiled positions. Frequently lifting and draining a dependent loop will provide the same total drainage amount as maintaining the tubing in a straight or coiled position, but pressures may be altered sufficiently within the tube to exceed recommended levels.
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Richter, Manuel J., Steven Hsu, Athiththan Yogeswaran, Faeq Husain-Syed, István Vadász, Hossein A. Ghofrani, Robert Naeije, et al. "Right ventricular pressure-volume loop shape and systolic pressure change in pulmonary hypertension." American Journal of Physiology-Lung Cellular and Molecular Physiology 320, no. 5 (May 1, 2021): L715—L725. http://dx.doi.org/10.1152/ajplung.00583.2020.

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Right ventricular (RV) function determines outcome in pulmonary arterial hypertension (PAH). RV pressure-volume loops, the gold standard for measuring RV function, are difficult to analyze. Our aim was to investigate whether simple assessments of RV pressure-volume loop morphology and RV systolic pressure differential reflect PAH severity and RV function. We analyzed multibeat RV pressure-volume loops (obtained by conductance catheterization with preload reduction) in 77 patients with PAH and 15 patients without pulmonary hypertension in two centers. Patients were categorized according to their pressure-volume loop shape (triangular, quadratic, trapezoid, or notched). RV systolic pressure differential was defined as end-systolic minus beginning-systolic pressure (ESP − BSP), augmentation index as ESP − BSP/pulse pressure, pulmonary arterial capacitance (PAC) as stroke volume/pulse pressure, and RV-arterial coupling as end-systolic/arterial elastance (Ees/Ea). Trapezoid and notched pressure-volume loops were associated with the highest afterload (Ea), augmentation index, pulmonary vascular resistance (PVR), mean pulmonary arterial pressure, stroke work, B-type natriuretic peptide, and the lowest Ees/Ea and PAC. Multivariate linear regression identified Ea, PVR, and stroke work as the main determinants of ESP − BSP. ESP − BSP also significantly correlated with multibeat Ees/Ea (Spearman’s ρ: −0.518, P < 0.001). A separate retrospective analysis of 113 patients with PAH showed that ESP − BSP obtained by routine right heart catheterization significantly correlated with a noninvasive surrogate of RV-arterial coupling (tricuspid annular plane systolic excursion/pulmonary arterial systolic pressure ratio; ρ: −0.376, P < 0.001). In conclusion, pressure-volume loop shape and RV systolic pressure differential predominately depend on afterload and PAH severity and reflect RV-arterial coupling in PAH.
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Aghajani, Ebrahim, Stig Muller, Knut E. Kj??rstad, Christian Korvald, Dag Nordhaug, Arthur Revhaugand, and Truls Myrmel. "THE PRESSURE-VOLUME LOOP REVISITED." Shock 25, no. 4 (April 2006): 370–76. http://dx.doi.org/10.1097/01.shk.0000209521.20496.7a.

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Quick, Christopher M., Mohammad W. Mohiuddin, Glen A. Laine, and Abraham Noordergraaf. "The arterial system pressure–volume loop." Physiological Measurement 26, no. 6 (November 9, 2005): N29—N35. http://dx.doi.org/10.1088/0967-3334/26/6/n01.

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Krishan, V. "Modelling of a solar coronal loop." Journal of Plasma Physics 56, no. 3 (December 1996): 427–40. http://dx.doi.org/10.1017/s0022377800019395.

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Montgomery and co-workers have developed a framework to describe the steady state of a turbulent magnetofluid, without the usual recourse to linearization. Thus the magnetic and velocity fields emerge in their fully nonlinear form as a consequence of the selective decays of the invariants of the system. Using this statistical theory of magnetohydrodynamic turbulence, the pressure, magnetic and flow fields of a solar coronal loop have been determined. The spatial and time profiles of the loop pressure are derived. A comparison with the observed properties of the loops is made, whenever possible.
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Schmelz, JO, D. Johnson, JM Norton, M. Andrews, and PA Gordon. "Effects of position of chest drainage tube on volume drained and pressure." American Journal of Critical Care 8, no. 5 (September 1, 1999): 319–23. http://dx.doi.org/10.4037/ajcc1999.8.5.319.

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BACKGROUND: The nursing practice of avoiding dependent loops in the tubing of chest drainage systems because such loops may impede drainage and alter the intrapleural pressure is not research based. OBJECTIVES: To determine if the volume of fluid drained and pressure vary when the chest drainage tubing is straight, coiled, has a dependent loop, or has a dependent loop that is periodically lifted and drained. METHODS: A repeated-measures design was used. For each tubing position, 500 mL of fluid was infused into the pleural space of 8 adult pigs during 45 minutes. The volume of fluid drained and the pressure at 2 locations within the drainage tubing were measured for 1 hour. RESULTS: After 60 minutes, significantly less fluid (least significant difference test, P = .03) was drained with the dependent-loop tubing position (65 mL) than with the other 3 positions. However, the amount of fluid drained was not significantly different among the lift and drain (250 mL), coiled (301 mL), or straight (337 mL) tubing positions. Throughout the entire study, pressure at the connection between the chest tube and the drainage tube was significantly higher (least significant difference test, P = .003) for the dependent loop with and without periodic lifting and draining. CONCLUSIONS: Straight and coiled tube positions are optimal for draining fluid from the pleural space. If a dependent loop cannot be avoided, lifting and draining it every 15 minutes will maintain adequate drainage.
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Kado, Yuichiro, Takuma Miyamoto, David J. Horvath, Shengqiang Gao, Kiyotaka Fukamachi, and Jamshid H. Karimov. "Development of a circulatory mock loop for biventricular device testing with various heart conditions." International Journal of Artificial Organs 43, no. 9 (February 4, 2020): 600–605. http://dx.doi.org/10.1177/0391398820903316.

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This study aimed to evaluate a newly designed circulatory mock loop intended to model cardiac and circulatory hemodynamics for mechanical circulatory support device testing. The mock loop was built with dedicated ports suitable for attaching assist devices in various configurations. This biventricular mock loop uses two pneumatic pumps (Abiomed AB5000™, Danvers, MA, USA) driven by a dual-output driver (Thoratec Model 2600, Pleasanton, CA, USA). The drive pressures can be individually modified to simulate a healthy heart and left and/or right heart failure conditions, and variable compliance and fluid volume allow for additional customization. The loop output for a healthy heart was tested at 4.2 L/min with left and right atrial pressures of 1 and 5 mm Hg, respectively; a mean aortic pressure of 93 mm Hg; and pulmonary artery pressure of 17 mm Hg. Under conditions of left heart failure, these values were reduced to 2.1 L/min output, left atrial pressure = 28 mm Hg, right atrial pressure = 3 mm Hg, aortic pressure = 58 mm Hg, and pulmonary artery pressure = 35 mm Hg. Right heart failure resulted in the reverse balance: left atrial pressure = 0 mm Hg, right atrial pressure = 30 mm Hg, aortic pressure = 100 mm Hg, and pulmonary artery pressure = 13 mm Hg with a flow of 3.9 L/min. For biventricular heart failure, flow was decreased to 1.6 L/min, left atrial pressure = 13 mm Hg, right atrial pressure = 13 mm Hg, aortic pressure = 52 mm Hg, and pulmonary artery pressure = 18 mm Hg. This mock loop could become a reliable bench tool to simulate a range of heart failure conditions.
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Durrant, C. J., and S. F. Brown. "Coronal Loops in Solar Active Regions." Publications of the Astronomical Society of Australia 8, no. 2 (1989): 137–41. http://dx.doi.org/10.1017/s132335800002316x.

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AbstractWe discuss the appearance of solar active regions as seen in EUV line radiation in terms of a system of simple static coronal loop models. The loop models are based on those of Rosner et al. (1978) and may be understood in terms of the scaling laws introduced by these authors. We present here some generalized scaling laws which demonstrate that the global properties of loops in fixed length are insensitive to everything but the overall heating rate or the basal pressure. The model and scaling laws appear to describe hot loops (T< 106K) well. Empirically determined temperatures and densities in cooler loops are not in agreement with coronal loop models.We have computed a simple model of an active region using a dipole magnetic structure. The individual loop structures were calculated on the basis of the two different assumptions of constant basal pressure and of constant heating rate. This paper presents a preliminary discussion of the results and a comparison with observation.
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Chen, Guang Feng, Qing Qing Huang, Lin Lin Zhai, and Qing Qing Li. "Elastic Rod Based Carpet Loop Pile Trajectory Simulation." Advanced Materials Research 680 (April 2013): 392–97. http://dx.doi.org/10.4028/www.scientific.net/amr.680.392.

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The 3D simulation of tufted carpet pile loops need to calculate the direction loop pile. By simplifying the tufted carpet yarn into elongated elastic rod, without considering the extrusion between loops piles, applying pressure at both ends of loop pile. By analyzing the elastic rod stress deformation and using Matlab simulate to determine the yarn centerline direction with the flexible line. The simulation results show that the obtained yarn centerline path is consistent with the trend of actual loop pile.
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Dissertations / Theses on the topic "Pressure Loop"

1

Pereira, E. "Adaptive closed-loop control of arterial pressure during anaesthesia." Thesis, University of Bristol, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379565.

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Woo, Youngjin. "Inelastic Analysis of the Loop Tack Test for Pressure Sensitive Adhesives." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/29237.

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A numerical analysis of the loop tack test is presented to study the behavior of the strip and the influence of several factors, and the results are compared with experimental ones. The numerical results can be applied to model the performance of a pressure sensitive adhesive (PSA). Since the simulation of the loop tack test includes geometrical and material nonlinearities, it is solved numerically by the finite element method. The finite element program ABAQUS is used throughout the research. As the teardrop shaped loop is pushed down onto the adhesive and then pulled up, the variation of the loop behavior is investigated using two-dimensional (2D) and three-dimensional (3D) models. A bilinear elastic-plastic constitutive law is used for the strip. The deformation of the pressure sensitive adhesive is approximated as uniaxial extension of independent adhesive strands. A Winkler-type nonlinear elastic foundation and a viscoelastic foundation are used to model the PSA. A nonlinear elastic spring function is used, which is composed of a compression region for the bonding phase and a tension region for the debonding phase. A debonding failure criterion is assumed, in which an adhesive strand will debond when it reaches a certain length. During the bonding phase, it is assumed that the loop is perfectly bonded, and the contact time is not included. Curves of the pulling force versus the top displacement (i.e., tack curves) are obtained throughout the simulation. A parametric study is made with respect to the nonlinear spring function parameters, experimental uncertainties, and strip thickness. Anticlastic bending behavior is shown in the 3D analysis, and the contact patterns are presented. The effects of the elasticity modulus of the PSA for the elastic foundation and the displacement rate for the viscoelastic model are investigated.
Ph. D.
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Williams, NuRocha Lyn. "Elastic Analysis of the Loop Tack Test for Pressure Sensitive Adhesives." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/33983.

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The loop tack test measures the tack (instant grip) of an adhesive. An analytical model of this test seems to be lacking and is the subject of this research. The strip is investigated using several mathematical formulations, and the solutions are obtained numerically. The loop is created from a flexible elastic strip that is bent into a teardrop shape, with its ends clamped together. The strip is tested in a cycle, in which the loop is first pushed onto the surface, compressing the adhesive. Then the loop is pulled up, and gradually debonds from the substrate. The loop is assumed to be nonlinearly elastic and inextensible. The mechanics of the loop tack test are studied in order to determine the impact of various factors on adhesive performance. These factors include the stiffness of the backing, the stiffness and thickness of the adhesive, the elongation of the adhesive before debonding, and the contact time. The relationship between the applied force and the vertical deflection of the loop's ends is determined, as well as that between the applied force and the contact length. Also, the maximum "pull - off" force needed to remove the substrate from the loop is obtained from the results. Shapes of the loop during the cycle are found. This research will increase understanding of the behavior of the adhesive and backing during the loop tack test. With the computer model that has been developed, any set of parameters and conditions can be analyzed, and improvements can be made in the test procedure.
Master of Science
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HAMDAN, MOHAMMAD OMAR. "LOOP HEAT PIPE (LHP) MODELING AND DEVELOPMENT BY UTILIZING COHERENT POROUS SILICION (CPS) WICKS." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1049987207.

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Ma, Jinge. "Design of Frequency Output Pressure Transducer." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc804933/.

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Piezoelectricity crystal is used in different area in industry, such as downhole oil, gas industry, and ballistics. The piezoelectricity crystals are able to create electric fields due to mechanical deformation called the direct piezoelectric effect, or create mechanical deformation due to the effect of electric field called the indirect piezoelectric effect. In this thesis, piezoelectricity effect is the core part. There are 4 parts in the frequency output pressure transducer: two crystal oscillators, phase-locked loop (PLL), mixer, frequency counter. Crystal oscillator is used to activate the piezoelectricity crystal which is made from quartz. The resonance frequency of the piezoelectricity crystal will be increased with the higher pressure applied. The signal of the resonance frequency will be transmitted to the PLL. The function of the PLL is detect the frequency change in the input signal and makes the output of the PLL has the same frequency and same phase with the input signal. The output of the PLL will be transmitted to a Mixer. The mixer has two inputs and one output. One input signal is from the pressure crystal oscillator and another one is from the reference crystal oscillator. The frequency difference of the two signal will transmitted to the frequency counter from the output of the mixer. Thus, the frequency output pressure transducer with a frequency counter is a portable device which is able to measure the pressure without oscilloscope or computer.
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Laurenti, Rafael. "The Karma of Products : Exploring the Causality of Environmental Pressure with Causal Loop Diagram and Environmental Footprint." Doctoral thesis, KTH, Industriell ekologi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-184223.

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Environmental pressures from consumer products and mechanisms of predetermination were examined in this thesis using causal loop diagram (CLD) and life cycle assessment (LCA) footprinting to respectively illustrate and provide some indicators about these mechanisms. Theoretical arguments and their practical implications were subjected to qualitative and quantitative analysis, using secondary and primary data. A study integrating theories from various research fields indicated that combining product-service system offerings and environmental policy instruments can be a salient aspect of the system change required for decoupling economic growth from consumption and environmental impacts. In a related study, modes of system behaviour identified were related to some pervasive sustainability challenges to the design of electronic products. This showed that because of consumption and investment dynamics, directing consumers to buy more expensive products in order to restrict their availability of money and avoid increased consumption will not necessarily decrease the total negative burden of consumption. In a study examining product systems, those of washing machines and passenger cars were modelled to identify variables causing environmental impacts through feedback loops, but left outside the scope of LCA studies. These variables can be considered in LCAs through scenario and sensitivity analysis. The carbon, water and energy footprint of leather processing technologies was measured in a study on 12 tanneries in seven countries, for which collection of primary data (even with narrow systems boundaries) proved to be very challenging. Moreover, there were wide variations in the primary data from different tanneries, demonstrating that secondary data should be used with caution in LCA of leather products. A study examining pre-consumer waste developed a footprint metric capable of improving knowledge and awareness among producers and consumers about the total waste generated in the course of producing products. The metric was tested on 10 generic consumer goods and showed that quantities, types and sources of waste generation can differ quite radically between product groups. This revealed a need for standardised ways to convey the environmental and scale of significance of waste types and for an international standard procedure for quantification and communication of product waste footprint. Finally, a planning framework was developed to facilitate inclusion of unintended environmental consequences when devising improvement actions. The results as a whole illustrate the quality and relevance of CLD; the problems with using secondary data in LCA studies; difficulties in acquiring primary data; a need for improved waste declaration in LCA and a standardised procedure for calculation and communication of the waste footprint of products; and systems change opportunities for product engineers, designers and policy makers.

Jury committee

Henrikke Baumann, Associate Professor

Chalmers University of Technology

Department of Energy and Environment

Division of Environmental System Analysis

Joakim Krook, Associate Professor

Linköpings Universitet

Department of Management and Engineering (IEI) / Environmental Technology and Management (MILJÖ)

Karl Johan Bonnedal, Associate Professor

Umeå University

Umeå School of Business and Economics (USBE)

Sofia Ritzén, Professor

KTH Royal Institute of Technology

School of Industrial Engineering and Management

Department of Machine Design

Integrated Product Development

QC 20160405

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Foschi, Edoardo. "Design of a return circuit for an open loop wind tunnel." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21536/.

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This work is about the design of two different solutions of a return circuit for the subsonic open loop wind tunnel of the University of Bologna placed in the laboratory of aerodynamics. The possibility of realizing a return circuit was born from the idea of moving the current wind tunnel to a different place. Realizing a closed-type wind tunnel could permit a better installation with reduced costs since the starting point of the project is an existing tunnel. Two different design solutions are shown in order to satisfy different conditions of allocation: one model has vertical development, the other has horizontal development. The conceptual phase is followed by a study of the pressure losses in order to evaluate which design solution could be the best.
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Sutherland, Erika Susanne. "Analysis of the performance and stability of a passive recirculation loop for hydrogen delivery to a PEM fuel cell system." Digital WPI, 2011. https://digitalcommons.wpi.edu/etd-theses/443.

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Proton Exchange Membrane (PEM) fuel cells are becoming an increasingly important alternative to combustion engines as the fossil fuel reserves are depleted. Several papers have presented steady state analyses of the system, but few are known to present dynamic analysis of the flow and control of the hydrogen delivery process. This thesis presents the dynamic analysis of hydrogen delivery to a PEM fuel cell system. The hydrogen is delivered to the anode with use of an ejector for passive recirculation. The system to be studied consists of the manifolds, ejector, and pressure control valve. Models describing the elements of the anode delivery systems are formulated. The governing nonlinear equations are solved analytically and numerically, and the regimes of stable hydrogen delivery process are established. The linearized models are used for performance analysis and optimization of the hydrogen delivery process. The nonlinear model is used to improve the simulation of the dynamics of the PEM fuel cell system and validate the parameters at optimal linearized stability. Experiments are conducted to find the parameters used in the model, as well as validate the results. Both the linear and nonlinear models are implemented in Simulink and tested against the laboratory data from the PEM fuel cell system. The analysis showed that the models have the same time constant and dynamic behavior as the PEM system. The optimal parameters for stability and a faster response with no oscillations in the output are obtained. The redesigned valve and resulting dynamics of the PEM fuel cell system provides improved system performance.
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Peterson, Zachary W. "Closed-Loop Thrust and Pressure Profile Throttling of a Nitrous Oxide/Hydroxyl-Terminated Polybutadiene Hybrid Rocket Motor." DigitalCommons@USU, 2012. https://digitalcommons.usu.edu/etd/1400.

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Hybrid motors that employ non-toxic, non-explosive components with a liquid oxidizer and a solid hydrocarbon fuel grain have inherently safe operating characteristics. The inherent safety of hybrid rocket motors offers the potential to greatly reduce overall operating costs. Another key advantage of hybrid rocket motors is the potential for in-flight shutdown, restart, and throttle by controlling the pressure drop between the oxidizer tank and the injector. This research designed, developed, and ground tested a closed-loop throttle controller for a hybrid rocket motor using nitrous oxide and hydroxyl-terminated polybutadiene as propellants. The research simultaneously developed closed-loop throttle algorithms and lab scale motor hardware to evaluate the fidelity of the throttle simulations and algorithms. Initial open-loop motor tests were performed to better classify system parameters and to validate motor performance values. Deep-throttle open-loop tests evaluated limits of stable thrust that can be achieved on the test hardware. Open-loop tests demonstrated the ability to throttle the motor to less than 10% of maximum thrust with little reduction in effective specific impulse and acoustical stability. Following the open-loop development, closed-loop, hardware-in-the-loop tests were performed. The closed-loop controller successfully tracked prescribed step and ramp command profiles with a high degree of fidelity. Steady-state accuracy was greatly improved over uncontrolled thrust.
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Fernandez, Alvarez Juan Jose. "Design of a high-pressure research flow loop for the experimental investigation of liquid loading in gas wells." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2358.

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Books on the topic "Pressure Loop"

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Sun, J. G. Analysis of boron dilution in a four-loop PWR. Washington, DC: U.S. Nuclear Regulatory Commission, 1995.

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Vijayan, P. K. Steady state and stability characteristics of a supercritical pressure natural circulation loop (SPNCL) with CO₂. Mumbai: Scientific Information Resource Division, Bhabha Atomic Research Centre, 2013.

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La presse dans la gueule du loup. Port-au-Prince, Haïti: Imprimerie Le Natal S.A., 2007.

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Brennan, Paul. Blowback: An anecdotal look at pressure equipment and other harmless devices that can kill you! Columbus, OH: The National Board of Boiler and Pressure Vessel Inspectors, 2013.

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Lutz, Susan. How do I look?: Important questions in every girl's life. Greensboro, NC: New Growth Press, 2012.

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Cotton, Christopher. The gender gap cracks under pressure: A detailed look at male and female performance differences during competitions. Cambridge, MA: National Bureau of Economic Research, 2010.

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Cotton, Christopher. The gender gap cracks under pressure: A detailed look at male and female performance differences during competitions. Cambridge, MA: National Bureau of Economic Research, 2010.

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Hawley, Suzanne L. Solar flare model atmospheres. [Washington, DC: National Aeronautics and Space Administration, 1993.

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Broder, David S. Behind the front page: A candid look at how the news is made. New York: Simon and Schuster, 1987.

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Barna, George. Today's pastors: A revealing look at what pastors are saying about themselves, their peers, and the pressures they face. Ventura, Calif., U.S.A: Regal Books, 1993.

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Book chapters on the topic "Pressure Loop"

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Arnal, Jean-Michel. "Pressure-Volume Loop." In Monitoring Mechanical Ventilation Using Ventilator Waveforms, 129–48. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-58655-7_6.

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Kam, Peter, Ian Power, Michael J. Cousins, and Philip J. Siddal. "Pressure–Volume Loop of the Left Ventricle." In Principles of Physiology for the Anaesthetist, 161–65. Fourth edition. | Boca Raton : CRC Press, Taylor & Francis Group, 2020.: CRC Press, 2020. http://dx.doi.org/10.1201/9780429288210-26.

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Remec, I., and M. Najžer. "Analysis of Pressure Vessel Cavity and Surveillance Capsule Dosimetry from a Two Loop PWR." In Proceedings of the Seventh ASTM-Euratom Symposium on Reactor Dosimetry, 63–71. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2781-3_7.

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Douillet, Alban, and Guang R. Gao. "Register Pressure in Software-Pipelined Loop Nests: Fast Computation and Impact on Architecture Design." In Languages and Compilers for Parallel Computing, 17–31. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/978-3-540-69330-7_2.

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Remec, I., and M. Najžer. "Analysis of Pressure Vessel Cavity and Surveillance Capsule Dosimetry from a Two Loop PWR." In Proceedings of the Seventh ASTM-Euratom Symposium on Reactor Dosimetry, 135–43. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2781-3_15.

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Ziegler, Tilman, Karl-Ludwig Laugwitz, and Christian Kupatt. "Left Ventricular Pressure Volume Loop Measurements Using Conductance Catheters to Assess Myocardial Function in Mice." In Methods in Molecular Biology, 33–41. New York, NY: Springer US, 2020. http://dx.doi.org/10.1007/978-1-0716-0668-1_3.

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Oommen, Libin P., and G. N. Kumar. "Experimental Studies on the Effect of Varying Rates of Part-Cooled EGR in High Pressure Loop on an MPFI Engine Under Variable Speed Operation." In Lecture Notes in Mechanical Engineering, 479–95. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5996-9_37.

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Wu, K. C. "Peak Loop Pressure and Temperature and Comparison of Total Cooling Provided to the Energy Released after Low Current Quenches of SSC Dipoles in Magcool Cryogenic System." In Advances in Cryogenic Engineering, 789–96. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2522-6_95.

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de Graaf, Florijn, and Simon Goddek. "Smarthoods: Aquaponics Integrated Microgrids." In Aquaponics Food Production Systems, 379–92. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-15943-6_15.

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AbstractWith the pressure to transition towards a fully renewable energy system increasing, a new type of power system architecture is emerging: the microgrid. A microgrid integrates a multitude of decentralised renewable energy technologies using smart energy management systems, in order to efficiently balance the local production and consumption of renewable energy, resulting in a high degree of flexibility and resilience. Generally, the performance of a microgrid increases with the number of technologies present, although it remains difficult to create a fully autonomous microgrid within economic reason (de Graaf F, New strategies for smart integrated decentralised energy systems, 2018). In order to improve the self-sufficiency and flexibility of these microgrids, this research proposes integrating a neighbourhood microgrid with an urban agriculture facility that houses a decoupled multi-loop aquaponics facility. This new concept is called Smarthood, where all Food–Water–Energy flows are circularly connected. In doing so, the performance of the microgrid greatly improves, due to the high flexibility present within the thermal mass, pumps and lighting systems. As a result, it is possible to achieve 95.38% power and 100% heat self-sufficiency. This result is promising, as it could pave the way towards realising these fully circular, decentralised Food–Water–Energy systems.
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Jain, Pankaj, and Christopher S. Hayward. "Pressure-volume loops: Background theory with practical examples." In Interventional Cardiology and Cardiac Catheterisation, 233–47. Second edition. | Boca Raton, FL : CRC Press, Taylor & Francis Group, [2019] | Preceded by Cardiology and cardiac catheterisation : the essential guide / edited by John Boland and David W.M. Muller. 2001.: CRC Press, 2019. http://dx.doi.org/10.1201/9781351060356-18.

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Conference papers on the topic "Pressure Loop"

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Aoki, Shigeru, and Takeshi Watanabe. "Forced Response of Continuous System With Hysteresis Loop Characteristics: System With Quadrilateral Hysteresis Loop Characteristics." In ASME 2005 Pressure Vessels and Piping Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/pvp2005-71279.

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This paper deals with steady-state response of a continuous system with collision characteristics. Considering the energy loss in a collision, an analytical method of approximate solution for the continuous system with symmetrical hysteresis loop characteristics is presented. The resonance curves of nonlinear response obtained from approximate solution are shown as discontinuous line, and are discussed the phenomenon.
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Bergmans, John, and Roberto Di Salvo. "Solid Rocket Closed-Loop Pressure Control." In 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.2003-4968.

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Zeng, Wen, Hai Fu, and Songjing Li. "Closed-Loop Pressure Feedback Control of a Pressure-Driven Microdroplet Generator." In 9th FPNI Ph.D. Symposium on Fluid Power. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/fpni2016-1524.

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To predict the size of droplets formed by pressure-driven flows, the droplet size as a nonlinear function of the pressure ratio is measured experimentally. The mathematical model of the pressure-driven microfluidic device is established, and by varying the volume of a container, comparative and quantitative measurements of the response speed and control accuracy of pressure-driven flows are presented. In particular, a closed-loop control system with feedback of the driven pressure is demonstrated, and the deviation between the measured and the predicted value of the driven pressure can be eliminated by using a PI controller. As a result, by accurately controlling the driven pressure of pressure-driven flows, monodisperse droplets with a desired size can be formed for pressure-driven microdroplet generators.
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Mohammad, Irshad, and Haiying Huang. "Plantar pressure sensing using loop antenna sensors." In the 5th International Conference. New York, New York, USA: ACM Press, 2012. http://dx.doi.org/10.1145/2413097.2413107.

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Trieglaff, Ralf, Christian Schrandt, Axel Schulz, and Mayk Schulz. "TUEV NORD Concept Loop: Lifetime Optimisation of Pipelines." In ASME 2014 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/pvp2014-28755.

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LOOP is a concept to evaluate corroded or damaged pipelines based on detailed data from UT-pigging. The procedure of LOOP delivers a 3D-model generated from the data of a commercial in-line inspection tools (ultrasonic, magnetic flux). This makes it possible to use the full functionalities of the relevant finite element software like evaluation of wall-thinning (LOOP 1) and fracture mechanics analysis to evaluate cracks in the wall (LOOP 2). In this paper is given the basic ideas of the LOOP concept, where the main focus is directed to the LOOP 1 assessment procedure. Based on a real example of a corroded pipeline is demonstrated the assessment procedure, which is based on an elastic-plastic analysis of a real inner contour of the corroded surface transferred in the finite element geometry model. The unique element is that the surface data of the UT-pigging is used directly to generate the geometry model in the FE-software ANSYS. The assessment procedure is validated by a burst pressure test of a corroded pipeline. The result of the burst pressure test is compared with the calculated limit load from an elastic-plastic analysis based on measured material properties. Additionally, the assessment procedure is compared with the results of a limit load analysis based on DIN EN 13445-3 and with the results of the standard assessment procedure. At the end the assessment procedure is compared with the procedure given in API 579-1 standard.
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Zhang, M. M., L. Cheng, and Y. Zhou. "Closed-Loop Control Vortex-Airfoil Interaction Noise." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93893.

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Closed-loop controlled interactions between an airfoil and impinging vortices were experimentally investigated. This work aims to minimize the fluctuating flow pressure (p) at the leading edge of the airfoil, which is a major source of the blade-vortex interaction noises commonly seen in rotorcrafts. Piezo-ceramic actuators were used to create a local surface perturbation near the leading edge of the airfoil in order to alter the airfoil-vortex interaction. Two closed-loop control schemes were investigated, which deployed p and the streamwise fluctuating flow velocity (u) as the feedback signal, respectively. While the control effect on p was measured using a fast response pressure transducer, the oncoming vortical flow was monitored using a particle image velocimetry and a hot wire. It was found that the control scheme based on the feedback signal u led to a pronounced impairment in the strength of oncoming vortices and meanwhile a maximum reduction in p by 39%, outperforming the control scheme based on the feedback signal p. Physics behind the observations is discussed.
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Gongharov, K. A., A. Yu Kochetkov, and V. N. Buz. "Development of Loop Heat Pipe with Pressure Regulator." In International Conference On Environmental Systems. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2006. http://dx.doi.org/10.4271/2006-01-2171.

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Zheng, Quan, Bruce Church, and Ken Defore. "Closed Loop Pressure Control System Requirements and Implementation." In SAE 2011 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2011. http://dx.doi.org/10.4271/2011-01-0391.

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Lu, Qilong, Magdi Khair, Jeongmin Lee, Seongoh Lee, Euisung Lee, and Kwonoh Oh. "A Filtration System for High-Pressure Loop EGR." In SAE 2011 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2011. http://dx.doi.org/10.4271/2011-01-0413.

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Van Duyne, Daniel A., Lenin B. Semprucci, and Nathan Jaycox. "Pump Start Transients in Closed Loop System Solved With Restriction Orifices." In ASME 2003 Pressure Vessels and Piping Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/pvp2003-1811.

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Pressure spikes following pump start in a closed loop system at Millstone Unit 2, caused thermal relief valve lifting, and two remained partially open, draining 40 gpm (2.5 L/s). Entrapped air following maintenance activities caused these pressure spikes. Proposed solutions included changing pump impellers, removing all thermal relief valves, and vacuum filling the system. Altran proposed installing orifice plates as flow restrictors in the 8” (203 mm) lines from the surge tank. These flow restrictors reduced the collapse rate of the captive gas pockets and thus reduced the associated pressure spikes following pump start which was confirmed by tests performed in March, 2002.
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Reports on the topic "Pressure Loop"

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Godwin, Aaron. High Pressure Fire Loop Analysis. Office of Scientific and Technical Information (OSTI), October 2017. http://dx.doi.org/10.2172/1411237.

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Shires, Dale. Effects of Loop Unrolling and Loop Fusion on Register Pressure and Code Performance. Fort Belvoir, VA: Defense Technical Information Center, June 1997. http://dx.doi.org/10.21236/ada326916.

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Baumgard, Kirby, Antonio Triana, John Johnson, Song Yang, and Kiran Premchand. Exhaust Aftertreatment and Low Pressure Loop EGR Applied to an Off-Highway Engine. Office of Scientific and Technical Information (OSTI), January 2006. http://dx.doi.org/10.2172/992140.

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Williams, John, and Robert M. Rice. Navy High-Pressure Waterjet Closed-Loop Paint Stripping System (The National Shipbuilding Research Program). Fort Belvoir, VA: Defense Technical Information Center, January 1995. http://dx.doi.org/10.21236/ada454667.

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Gill, David, William Kolb, and Ronald Briggs. An evaluation of pressure and flow measurement in the Molten Salt Test Loop (MSTL) system. Office of Scientific and Technical Information (OSTI), July 2013. http://dx.doi.org/10.2172/1089992.

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Lu, S. C. Preliminary structural evaluation of Trojan RCL (reactor coolant loop) subject to postulated RPV (reactor pressure vessel) support failure. Office of Scientific and Technical Information (OSTI), January 1990. http://dx.doi.org/10.2172/5129291.

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Wu, K. C. Peak Loop Pressure and Peak Temperature in the MAGCOOL-Subcooler Cryogenic System after Low Current Quenches of SSC Dipole DCA213. Office of Scientific and Technical Information (OSTI), November 1992. http://dx.doi.org/10.2172/1119173.

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Sabau, Adrian, Kyle R. Gluesenkamp, Phil Lafond, and David Brownell. Certification and User Manual for A 5kW Heat Exchanger Test Loop at Low Temperatures and High-Pressures. Office of Scientific and Technical Information (OSTI), February 2020. http://dx.doi.org/10.2172/1606805.

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Cotton, Christopher, Frank McIntyre, and Joseph Price. The Gender Gap Cracks Under Pressure: A Detailed Look at Male and Female Performance Differences During Competitions. Cambridge, MA: National Bureau of Economic Research, October 2010. http://dx.doi.org/10.3386/w16436.

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Pettit, Chris, and D. Wilson. A physics-informed neural network for sound propagation in the atmospheric boundary layer. Engineer Research and Development Center (U.S.), June 2021. http://dx.doi.org/10.21079/11681/41034.

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We describe what we believe is the first effort to develop a physics-informed neural network (PINN) to predict sound propagation through the atmospheric boundary layer. PINN is a recent innovation in the application of deep learning to simulate physics. The motivation is to combine the strengths of data-driven models and physics models, thereby producing a regularized surrogate model using less data than a purely data-driven model. In a PINN, the data-driven loss function is augmented with penalty terms for deviations from the underlying physics, e.g., a governing equation or a boundary condition. Training data are obtained from Crank-Nicholson solutions of the parabolic equation with homogeneous ground impedance and Monin-Obukhov similarity theory for the effective sound speed in the moving atmosphere. Training data are random samples from an ensemble of solutions for combinations of parameters governing the impedance and the effective sound speed. PINN output is processed to produce realizations of transmission loss that look much like the Crank-Nicholson solutions. We describe the framework for implementing PINN for outdoor sound, and we outline practical matters related to network architecture, the size of the training set, the physics-informed loss function, and challenge of managing the spatial complexity of the complex pressure.
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