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Journal articles on the topic 'Unstable charge pump'

Author: Grafiati

Published: 19 July 2023

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1

Kumar, Amit, Ruby Gupta, and Jyotsna Sharma. "Effect of dust grains on the parametric coupling of a lower hybrid wave driven ion cyclotron wave in a tokamak plasma." AIP Advances 12, no. 3 (2022): 035026. http://dx.doi.org/10.1063/5.0085062.

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In this article, the effect of dust charge fluctuations on the parametric upconversion of a lower hybrid wave into an ion cyclotron wave and a side band wave in a two-ion species tokamak plasma is studied. When the oscillatory velocity of plasma electrons is a few percent of the sound velocity, the lower hybrid wave becomes unstable and decays into two modes: an ion cyclotron wave mode and a low frequency lower hybrid side band wave. Furthermore, a ponderomotive force by a lower hybrid pump and a side band wave is exerted on the existing electrons, which drives the ion cyclotron decay mode. Th

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Gray, Megan M., Anita A. Thomas, Brian Burns, and Rachel A. Umoren. "Identifying Crucial Equipment and Skills Needed to Evacuate Critically Ill Infants During Disasters: Using Nursing Expertise to Guide Training Targets." Prehospital and Disaster Medicine 34, no. 04 (2019): 370–75. http://dx.doi.org/10.1017/s1049023x19004473.

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AbstractIntroduction:Unexpected disasters, such as earthquakes or fires, require preparation to address knowledge gaps that may negatively affect vulnerable patients. Training programs can promote natural disaster readiness to respond and evacuate patients safely, but also require evidence-based information to guide learning objectives.Problem:There is limited evidence on what skills and bedside equipment are most important to include in disaster training and evacuation programs for critically ill infants.Methods:An expert panel was used to create a 13-item mastery checklist of skills for beds

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3

Luo, Can, Hao Liu, Li Cheng, Chuan Wang, Weixuan Jiao, and Di Zhang. "Unsteady Flow Process in Mixed Waterjet Propulsion Pumps with Nozzle Based on Computational Fluid Dynamics." Processes 7, no. 12 (2019): 910. http://dx.doi.org/10.3390/pr7120910.

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The unsteady flow process of waterjet pumps is related to the comprehensive performance and phenomenon of rotating stall and cavitation. To analyze the unsteady flow process on the unsteady condition, a computational domain containing nozzle, impeller, outlet guide vane (OGV), and shaft is established. The surface vortex of the blade is unstable at the valley point of the hydraulic unstable zone. The vortex core and morphological characteristics of the vortex will change in a small range with time. The flow of the best efficiency point and the start point of the hydraulic unstable zone on each

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Han, Feng, Xionghuan Chen, Yang Yang, and Chuan Wang. "Numerical and Experimental Study on the Effect of Rotor–Stator Distance on Rotor–Stator Interaction Strength within Mixed-Flow Centrifugal Pumps." Journal of Marine Science and Engineering 10, no. 8 (2022): 1114. http://dx.doi.org/10.3390/jmse10081114.

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In this article, the influence of rotor–stator distance on the pump performance and rotor–stator interaction strength within mixed-flow centrifugal pump was investigated based on numerical calculation and test verification. Firstly, the performances of mixed-flow centrifugal pumps with two different rotor–stator distances were obtained and compared with the numerical results, which confirms the high accuracy of the numerical simulation. Next, the performances of mixed-flow centrifugal pumps with five different rotor–stator distances were compared and analyzed. It was found that the hydraulic p

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Itkin, G. P., A. A. Drobyshev, O. Yu Dmitrieva, A. S. Buchnev, and A. A. Sysoev. "TESTING THE INTERACTION OF HEART LEFT VENTRICLE AND CONTINUOUS-FLOW PUMP ON A MOCK CIRCULATION MODEL UNDER NORMAL AND PATHOLOGICAL CONDITIONS." Russian Journal of Transplantology and Artificial Organs 17, no. 3 (2015): 43–49. http://dx.doi.org/10.15825/1995-1191-2015-3-43-49.

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Introduction. The preliminary study of new developed pumps for circulatory support on the hydrodynamic circulation model is an important step in the process of their designing. Hydrodynamic circulation models that can closely imitate cardio – vascular system are important to defi ne the range of effective functioning of the pumps under normal and heart disease conditions which is of great importance for defi ning the mode of these pumps in real clinical conditions.The aim of study is to create a new hydrodynamic circulation model of the systemic circulation to study the processes of interactio

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Zhu, Chuanhui, Shubin Yan, Xiaodong Dong, Wei Zhang, Biyi Huang, and Yang Cui. "Exergy Analysis of Phase-Change Heat-Storage Coupled Solar Heat Pump Heating System." Materials 14, no. 19 (2021): 5552. http://dx.doi.org/10.3390/ma14195552.

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With the rapid development of industrialization, the excessive use of fossil fuels has caused problems such as increased greenhouse gas emissions and energy shortages. The development and use of renewable energy has attracted increased attention. In recent years, solar heat pump heating technology that uses clean solar energy combined with high-efficiency heat pump units is the development direction of clean heating in winter in northern regions. However, the use of solar energy is intermittent and unstable. The low-valley electricity policy is a night-time electricity price policy. Heat pump

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Sakai, Kento, Bungo Iwase, Keisuke Matsumoto, Kazuyoshi Miyagawa, and Satoshi Kawasaki. "Investigation on axial thrust behavior of balance piston system for a rocket pump." Journal of Physics: Conference Series 2217, no. 1 (2022): 012029. http://dx.doi.org/10.1088/1742-6596/2217/1/012029.

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Abstract High stability in axial direction is required for rocket pumps operated under extremely low-temperature and high-pressure conditions, turbopumps therefore uses balance piston (BP) system for balancing their axial thrust. The BP system is stable under quasi-static conditions. However, BP system might become dynamically unstable under some condition. Thus it is fundamental for stability evaluation of turbopumps to predict static/dynamic characteristics in axial direction of BP system. Furthermore, we focus on characteristic change by cavitation which often occurs in the pump inlet. In t

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Yang, Yongfei, Wei Li, Weidong Shi, Yuanfeng Ping, Yang Yang, and Lei Wang. "Numerical investigation on the unstable flow at off-design condition in a mixed-flow pump." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 233, no. 7 (2019): 849–65. http://dx.doi.org/10.1177/0957650919833892.

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The mixed-flow pump is wildly used in industrial and agricultural fields, and the requirements for its stability become more and more restricted with the improvement of the capacities. When the pump is operated under part-loading conditions, unstable characteristic like rotating stall happens and brings intensive vibration and noise. To reveal the internal unstable flow characteristics in mixed-flow pump, unsteady numerical simulation is conducted under different flow rates in the current research. The secondary flow and the vortex induced by the unsteady flow in the pump, which vary with the

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Yang, Mengqi, Xingxing Huang, Qilian He, et al. "Fluid-Structure Coupling Analysis of a Pump-turbine unit during the Pump Shutdown Transient Process." IOP Conference Series: Earth and Environmental Science 1079, no. 1 (2022): 012038. http://dx.doi.org/10.1088/1755-1315/1079/1/012038.

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Abstract Hydropower is a major renewable clean energy and is widely used worldwide. The reversible pump-turbine unit of the pumped-storage power station is able to work in two main operating modes as required by the power grid: turbine-mode for power generation and pump-mode for power storage. In order to absorb unstable energies such as wind and solar energy and improve the quality of the electricity, reversible pump-turbines need to frequently change operating conditions, and experience more start-stops under different operating modes in a short period. The unstable flow during these transie

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10

Nejneru, Carmen, Diana-Petronela Burduhos-Nergis, Mihai Axinte, Manuela Cristina Perju, and Costica Bejinariu. "Corrosion Behaviour of Nodular Cast Iron Used for Rotor Manufacturing in Different Wastewaters." Coatings 12, no. 7 (2022): 911. http://dx.doi.org/10.3390/coatings12070911.

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Submersible drainage sump pumps work in a highly corrosive environment, forming films with corrosive reaction products on the surface. Pump rotors are high-demand parts, so they are made of quality materials with good wear and corrosion resistance properties such as nodular graphite cast iron. This paper analyses the corrosion behaviour of cast iron used in the manufacture of rotors in three types of wastewaters, with variable pH. Nodular graphite cast iron samples were immersed in wastewater for 30, 60, and 90 days and tested by linear polarisation and electrochemical impedance spectroscopy (

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Zhou, Qin, Linsheng Xia, and Chunze Zhang. "Internal Mechanism and Improvement Criteria for the Runaway Oscillation Stability of a Pump-Turbine." Applied Sciences 8, no. 11 (2018): 2193. http://dx.doi.org/10.3390/app8112193.

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The runaway oscillation process of the pump-turbine in a high head pumped-storage power plant is usually unstable. The root cause of its instability is still unclear. In this paper, its internal mechanism and the improvement method were studied in depth. First, the flow characteristics in a model pump-turbine during the runaway process at four guide-vane openings (GVOs) were investigated by 3D transient numerical simulations. Then, the energy dissipation characteristics of different types of backflow vortex structures (BFVSs) occurring at the runner inlet and their impacts on the runaway stabi

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Chen, Shou Kai. "Simulation Analysis of Concrete Temperature and Stress by Inclined-Layer Placing Method." Applied Mechanics and Materials 438-439 (October 2013): 578–82. http://dx.doi.org/10.4028/www.scientific.net/amm.438-439.578.

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The water-collecting well layer of large pump station base plate is constrained by bottom and lateral, and step construction method is used. In view of the characteristics, the simulation is done to study its temperature and stress during construction. Based on a large pump station project and the structural characteristics and construction method of water-collecting well layer, the FEM model is built, and the theories of the 3D-FEM of unstable temperature field and stress field is used to carry out the numerical calculation, which can study change law and distribution of temperature and stres

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Liu, Junjie, Yi Fan, Zhengrong Shi, and Tao Zhang. "Feasibility Analysis of a Direct-drive PV Heat Pump System Based on Phase Change Heat Storage." Journal of Physics: Conference Series 2503, no. 1 (2023): 012008. http://dx.doi.org/10.1088/1742-6596/2503/1/012008.

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Abstract A direct-drive PV pump system based on phase change heat storage is proposed to address the current building energy consumption problem in heating/cooling. The system can solve the problems of unstable solar energy, high battery cost, and short battery service life. Taking a 45m 2 office in Shanghai as the research object, the annual dynamic simulation model of the system is built through TSNSYS. The linear weighted evaluation function method is used for multi-objective optimization analysis of system performance and cost. The results show that the selection scheme with a PV area of 2

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14

Cavazzini, G., G. Zanetti, A. Santolin, and G. Ardizzon. "Characterization of the hydrodynamic instabilities in a pump-turbine operating at part load in turbine mode." IOP Conference Series: Earth and Environmental Science 1079, no. 1 (2022): 012033. http://dx.doi.org/10.1088/1755-1315/1079/1/012033.

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Abstract Pump-turbines (RPT) nowadays represents the most common mechanical equipment adopted in the new generation of storage hydro plant. In order to balance the frequent changes in electricity production and consumption caused by unpredictable renewable energy sources, RPT are forced to rapidly switch between the pumping and generating mode also extending their operation under off-design conditions in unstable operating areas. Because of the design criterion adopted for the development of a RPT, an unstable behavior represented by a typical S-shaped profile with a positive slope in the mach

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Zhou, Ling, Yong Han, Wanning Lv, Yang Yang, Yong Zhu, and Xiangyu Song. "Numerical Calculation of Energy Performance and Transient Characteristics of Centrifugal Pump under Gas-Liquid Two-Phase Condition." Micromachines 11, no. 8 (2020): 728. http://dx.doi.org/10.3390/mi11080728.

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The unstable operation of a centrifugal pump under the gas-liquid two-phase condition seriously affects its performance and reliability. In order to study the gas phase distribution and the unsteady force in an impeller, based on the Euler-Euler heterogeneous flow model, the steady and unsteady numerical calculations of the gas-liquid two-phase full flow field in a centrifugal pump was carried out, and the simulation results were compared with the test data. The results show that the test results are in good agreement with the simulation data, which proves the accuracy of the numerical calcula

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16

Silva, T. M., N. N. P. Cerize, and A. M. Oliveira. "The Effect of High Shear Homogenization on Physical Stability of Emulsions." International Journal of Chemistry 8, no. 4 (2016): 52. http://dx.doi.org/10.5539/ijc.v8n4p52.

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<p class="03Abstract">Emulsions are thermodynamically unstable systems where droplet size is one of the main factors that affect its physical stability and consequently their quality. In this context, this work analyses the incorporation of a high shear homogenization step in the manufacturing process of an emulsion with the objective of maintaining its physical stability. In order to demonstrate the effects of this homogenization in the manufacturing process, the emulsion characterization was carried out by microscopy, rheology, laser diffraction and analytical photo-centrifugation tech

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17

Giavoni, Marta, María José Villanueva-Suárez, Rocío De la Peña-Armada, Alejandra Garcia-Alonso, and Inmaculada Mateos-Aparicio. "Pasteurization Modifies the Sensorial Attributes and Nutritional Profile of Orange Pulp By-Product." Foods 11, no. 13 (2022): 1973. http://dx.doi.org/10.3390/foods11131973.

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After orange processing, different by-products are generated, i.e., peels, seeds and pulps. The pulp is highly perishable, being an unstable food matrix that needs a preservation process to be stored and used again in the food production chain. Pasteurization is the technique of choice before aseptically packaging and storing under refrigerated conditions. In this study, the effect of pasteurization has been evaluated on the chemical, functional and sensorial profiles. Ash content decreased (p < 0.05) after the thermal treatment. Indeed, magnesium, calcium and zinc diminished, although copp

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18

Li, Shuo, Wei Li, Leilei Ji, Weidong Shi, and Ramesh K. Agarwal. "Vortex Dynamics Analysis of Internal Flow Field of Mixed-Flow Pump under Alford Effect." Water 13, no. 24 (2021): 3575. http://dx.doi.org/10.3390/w13243575.

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A multi-region dynamic slip method was established to study the internal flow characteristics of the mixed-flow pump under the Alford effect. The ANSYS Fluent software and the standard k-ε two-equation model were used to numerically predict the mixed-flow pump’s external characteristics and analyze the forces on the impeller and guide vane internal vortex structure and non-uniform tip gap of the mixed-flow pump at different eccentric distances. The research results show that the external characteristic results of the numerical calculation are consistent with the experimental measurement. The h

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Viaene, Eric, Hugues Chanteux, Hélène Servais, Marie-Paule Mingeot-Leclercq та Paul M. Tulkens. "Comparative Stability Studies of Antipseudomonal β-Lactams for Potential Administration through Portable Elastomeric Pumps (Home Therapy for Cystic Fibrosis Patients) and Motor-Operated Syringes (Intensive Care Units)". Antimicrobial Agents and Chemotherapy 46, № 8 (2002): 2327–32. http://dx.doi.org/10.1128/aac.46.8.2327-2332.2002.

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ABSTRACT The stability of antipseudomonal β-lactams in concentrated solutions was examined in view of their potential administration by continuous infusion with external pumps (for intensive care patients) or with portable pumps carried under clothing (for cystic fibrosis patients). Aztreonam (100 g/liter), piperacillin (128 g/liter, with tazobactam), and azlocillin (128 g/liter) remained 90% stable for up to more than 24 h at 37°C (mezlocillin [128 g/liter] was stable at 25°C but not at 37°C). Ceftazidime (120 g/liter), cefpirome (32 g/liter), and cefepime (50 g/liter) remained 90% stable for

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Devi, Manubolu Harika, and Srinivas Munjam. "Bioethanol Production from Rice Straw and Cellulose Degradation using Aspergillus terreus and Trichoderma harzanium." Biosciences Biotechnology Research Asia 19, no. 3 (2022): 699–711. http://dx.doi.org/10.13005/bbra/3022.

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On account of its minimal expense and a high potential for change into energy-producing products, lignocellulosic biomass is the future of bioenergy and energy. Notwithstanding, their true capacity is restricted by the utilization of inefficient and unstable enzymes. Therefore, the present work aim to investigate the cellulose degradation potential of two isolated fungal species Aspergillus terreus and Trichoderma harzanium followed by bioethanol production from acid-thermal pre-treated rice straw (RS). The experiments were conducted in two phases. In phase-I of experiments, the isolated cellu

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Fazzini, L., M. Gori, A. Calabrese, et al. "P284 POTENTIAL PROARRHYTHMIC SIDE EFFECT OF HIGH DOSE AND PROLONGED SODIUM NITROPRUSSIDE INFUSION THROUGH CALCIUM ION REDUCTION." European Heart Journal Supplements 25, Supplement_D (2023): D151. http://dx.doi.org/10.1093/eurheartjsupp/suad111.358.

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Abstract Patient presentation. A fifty y/o male patient with a history of congenital aortic stenosis surgically corrected previously and with chronic heart failure due to severe left ventricular dysfunction presented to our emergency department complaining dyspnea. Due to acute decompensated heart failure with ongoing cardiogenic shock, he was admitted to our intensive cardiology unit. Initial work up. The blood exams showed a normal renal and liver function, normal total and free calcium, 9.4 mg/dL and 1.16 mmol/L respectively, lactates were mildly increased. The chest x–ray showed pulmonary

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Bernardes, Thiago Fernandes, Ricardo Andrade Reis, and Rafael Camargo do Amaral. "Chemical and microbiological changes and aerobic stability of marandu grass silages after silo opening." Revista Brasileira de Zootecnia 38, no. 1 (2009): 1–8. http://dx.doi.org/10.1590/s1516-35982009000100001.

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This trial had the objective of characterizing the microbial population and evaluating the aerobic stability of Marandu grass silages with pelleted citrus pulp (PCP). The collected forage was submitted to the following treatments: Silage of Marandu grass; silage of Marandu grass + 50 g/kg PCP and silage of Marandu grass + 100 g/kg PCP on natural matter basis. Metal cylindrical containers with 80 cm of height and 50 cm of diameter were used as silos during assays of microbiological dynamics and chemical changes of silages in anaerobiosis. Evaluations were performed on days 0, 2, 4 and 6 after s

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Rahayuningtyas, Ari, Diang Sagita, and Novita Dwi Susanti. "Rancang bangun sistem monitoring dan kontrol pH air untuk budidaya ikan lele." Agrointek : Jurnal Teknologi Industri Pertanian 17, no. 1 (2023): 97–105. http://dx.doi.org/10.21107/agrointek.v17i1.14129.

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One of the water quality parameters that are important to consider in fish farming is pH. Unstable pH conditions can cause a decrease in water quality and cause fish to harvest less than optimal yields. Under certain conditions, there is an extreme change in the pH value, so it needs to be normalized again. This study aims to design a monitoring and control system of pH for catfish farming. The control system consisted of an SKU SEN0161 type pH sensor, equipped with two pumps to automatically flow alkaline and acidic pH solutions. The design method used was the prototyping method, i.e. Listen

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Widmer, Christian, Thomas Staubli, and Nathan Ledergerber. "Unstable Characteristics and Rotating Stall in Turbine Brake Operation of Pump-Turbines." Journal of Fluids Engineering 133, no. 4 (2011). http://dx.doi.org/10.1115/1.4003874.

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Reversible pump-turbines are versatile in the electricity market since they can be switched between pump and turbine operation within a few minutes. The emphasis on the design of the more sensitive pump flow however often leads to stability problems in no load or turbine brake operation. Unstable characteristics can be responsible for hydraulic system oscillations in these operating points. The cause of the unstable characteristics can be found in the blocking effect of either stationary vortex formation or rotating stall. The so-called unstable characteristic in turbine brake operation is def

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Wang, Jun-Li, Xing-Yuan Chen, Maxime Binama, Wen-Tao Su, and Jian Wu. "A Numerical Study on Mechanical Seal Dynamic Characteristics Within a Reactor Coolant Pump." Frontiers in Energy Research 10 (May 5, 2022). http://dx.doi.org/10.3389/fenrg.2022.879198.

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Unstable flow within a reactor coolant pump (RCP)’s mechanical seal may cause the change of its sealing parameters, possibly threatening RCP’s safe operations. In this study, based on the moving grid technology, a 3D fluid–structure interaction analysis model is established, where the influence of parameters such as the inlet pressure fluctuation, closing force fluctuation, and speed fluctuation on mechanical seal performance characteristics within an RCP is numerically studied. Study results have shown that when pressure and closing force fluctuations are applied, the static ring displacement

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Lu, Jiaxing, feng wu, Xiaobing Liu, Baoshan Zhu, Shouqi Yuan, and Jian Wang. "Investigation of the mechanism of unsteady flow induced by cavitation at the tongue of a centrifugal pump based on the proper orthogonal decomposition method." Physics of Fluids, September 9, 2022. http://dx.doi.org/10.1063/5.0113020.

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To investigate the unsteady evolution characteristics and mechanism of cavitation at the tongue and its influence on the flow field in a centrifugal pump, numerical calculations were performed to research the occurrence and development of cavitation at the tongue under large flow rate conditions. The numerical calculation results were verified by experiments. The proper orthogonal decomposition (POD) method was used to decompose and reconstruct the flow field at the tongue of the centrifugal pump. The relationship between the typical frequency of pressure pulsation and the mainstream structure

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Lin, Fei, Honglei Ren, Ting Wei, Yuezan Tao, Yucheng Li, and Jie Yang. "Geothermal dynamic constraints of groundwater source heat pump system in shallow aquifers." Frontiers in Energy Research 10 (January 6, 2023). http://dx.doi.org/10.3389/fenrg.2022.928125.

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Due to the temperature of shallow aquifers being affected by atmospheric temperature, groundwater source heat pumps (GWSHPs) become unstable and the operation efficiency of GWSHP is constrained. In the study, the coupling numerical simulation model of the groundwater flow field and temperature field is established based on the continuous monitoring results in an actual experimental site, and the water and thermal migration of shallow aquifer is simulated under the influence of the atmospheric environment. The influence of the dynamic change in ground temperature is analyzed on a GWSHP. The res

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Wang, Yefang, Fan Zhang, Shouqi Yuan, Ke Chen, Xueyuan Wei, and Desmond Appiah. "Effect of URANS and Hybrid RANS-Large Eddy Simulation Turbulence Models on Unsteady Turbulent Flows Inside a Side Channel Pump." Journal of Fluids Engineering 142, no. 6 (2020). http://dx.doi.org/10.1115/1.4045995.

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Abstract In this work, the unsteady Reynolds-averaged Navier–Stokes (URANS) and three hybrid Reynolds-averaged Navier–Stokes-large eddy simulation (RANS-LES) models are employed to resolve the vortical flows in a typical single-stage side channel pump, to evaluate the suitability of these advanced turbulence models in predicting the pump hydraulic performance and unstable swirling flows. By the comparison of the overall performance, it can be observed that the results obtained by scale-adapted simulation (SAS) are closer to test data than shear stress transport (SST), detached eddy simulation

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Siregar, Mey Hajarini, and Mulkan Iskandar Nasution. "RANCANG BANGUN SISTEM PEMBERIAN PAKAN DAN PENGATURAN pH AIR SECARA OTOMATIS PADABUDI DAYA IKAN LELE BERBASIS ATMEGA 16 MENGGUNAKAN MEDIA SMARTPHONE." JISTech (Journal of Islamic Science and Technology) 6, no. 2 (2021). http://dx.doi.org/10.30829/jistech.v6i2.11056.

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Research has been carried out that aims (i) to design a feeding system and water pH regulation in catfish farming automatically, (ii) to assemble and build a control circuit with existing electronic components and sensors, (iii) to apply the IoT system to pH controller made to be controlled remotely. The tool is designed to control the pH of the water by means of circulation and for measuring the pH of the water in the catfish pond, it is carried out periodically using a pH sensor of type PH4502C. The system uses the RTC DS1307 digital clock module to determine the feeding schedule. Smartphone

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Lei, Dan, Linlin Cao, Tairan Zhong, Qing-Yu He, and Xuesong Sun. "Residue Lys219 of CpxR is critical in the regulation of the antibiotic resistance of Escherichia coli." Journal of Antimicrobial Chemotherapy, June 8, 2023. http://dx.doi.org/10.1093/jac/dkad171.

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Abstract Background CpxR is a critical regulator in bacterial adaptation to various harmful stresses, and is known to regulate bacterial resistance to commonly used antibiotics, such as aminoglycosides, β-lactams and polypeptides. However, the detailed study of functional residues of CpxR remains insufficient. Objectives To investigate the contribution of Lys219 to CpxR’s function in regulating antibiotic resistance of Escherichia coli. Methods We performed sequence alignment and conservative analysis of the CpxR protein and constructed mutant strains. We then performed electrophoretic mobilit

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Tomov, Petar, Loic Pora, Richard Paridaens, et al. "Study of the Hydraulic Performances of Two Inducers in Water—CO2 Mixture—Toward Performance Improvement With Suppression of Prerotation." Journal of Fluids Engineering 144, no. 4 (2022). http://dx.doi.org/10.1115/1.4052951.

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Abstract The inducers increase the pressure available at the inlet of the impellers of centrifugal pumps. This technological solution may induce instabilities, such as prerotating flow at partial flow rates. The scientific literature offers studies on the cavitation in the inducers, as well as on the associated instabilities. However, studies describing devices that improve the behavior in these unstable regimes are rare. This is particularly true for fluids like aviation fuels or liquids with dissolved gases. In this work we expose, an experimental study for two axial inducers carried out at

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Wang, Honggeng, Shixiang Xu, Yue Yue Chen, and Baifei Shen. "Generation of terahertz radiation with fractional or integer OAMs from a fractional-order vortex two-color field." New Journal of Physics, August 8, 2022. http://dx.doi.org/10.1088/1367-2630/ac87c8.

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Abstract This paper investigates the generation of the ultra-broadwidth (0.1-30 THz) terahertz (THz) radiation carrying fractional/integer orbital angular momentums (OAMs) via the interaction of the two-color (ω0 and 2ω0) laser field carrying initial fractional topological charges (TCs) with air in a moderate pump intensity regime (20 TW/cm2<Ipump<50 TW/cm2). The two four-wave mixing (FWM) processes (i.e., ω0+ω′0-2ω0→ωTHz and 2ω0-ω0-ω′0→ωTHz) are responsible for THz generation. The two processes can produce two THz pulses. They interfere with each other and THz interference vortex beams

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Spears, Jenna, Yousif Al-Saiegh, farah olleik, Roy Taoutel, and John Steers. "Abstract 11593: The Critical Role of Transthoracic Echocardiography in the Evaluation of Cardiogenic Shock and Takotsubo Cardiomyopathy." Circulation 146, Suppl_1 (2022). http://dx.doi.org/10.1161/circ.146.suppl_1.11593.

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Introduction: Cardiogenic shock occurs in 10% of patients with takotsubo cardiomyopathy (TTC) as a result of severe systolic dysfunction, or left ventricular outflow tract (LVOT) obstruction. Methods: Case report and review of the literature. Results: A 62-year-old female with a history of hypertension and diabetes mellitus presented with lightheadedness, shortness of breath, and chest discomfort. She was hemodynamically unstable, tachycardic, and hypotensive (70/40 mmHg). Her EKG showed sinus tachycardia at 101 BPM with 1 mm ST depression in leads II, III, AVF; V3-V6. Chest radiograph reveale

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Martinez Primoy, I. R., B. Lorenzo-Lopez, N. Garcia-Gonzalez, R. Paez-Munoz, P. Marin-Andreu, and J. C. Garcia-Rubira. "After an acute coronary syndrome: levosimendan or dobutamine? this is our impression." European Heart Journal: Acute Cardiovascular Care 12, Supplement_1 (2023). http://dx.doi.org/10.1093/ehjacc/zuad036.110.

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Abstract Funding Acknowledgements Type of funding sources: None. Introduction Inotropic support is frequently needed after acute coronary syndromes(ACS) at coronary care units(CCU). Despite it has being long time since approval of levosimendan(LV) as inotropic support to cardiogenic shock, dobutamine(DB) still being the basis of this treatment. We think levosimendan is a secure and effective alternative. Purpose To analyse the use of levosimendan and dobutamine done in our ACS patients to determine if we have followed some clear criteria of selection, and try to draw a defined pattern for futu

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Tran, Dung L., Dara W. Childs, Hari Shrestha, and Min Zhang. "Preswirl and Mixed-Flow (Mainly Liquid) Effects on Rotordynamic Performance of a Long (L/D = 0.75) Smooth Seal." Journal of Engineering for Gas Turbines and Power 142, no. 3 (2020). http://dx.doi.org/10.1115/1.4044291.

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Abstract Measured results are presented for rotordynamic coefficients and mass leakage rates of a long smooth annular seal (length-to-diameter ratio L/D = 0.75, diameter D = 114.686 mm, and radial clearance Cr = 0.200 mm) tested with a mixture of silicone oil (PSF-5cSt) and air. The test seal is centered, the seal exit pressure is maintained at 6.9 bars-g while the fluid inlet temperature is controlled within 37.8–40.6 °C. It is tested with three inlet-preswirl inserts, namely, zero, medium, and high (the preswirl ratios (PSRs), i.e., the ratio between the fluid's circumferential velocity and

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Cuningham, Phillip Lamarr, and Melinda Lewis. "“Taking This from This and That from That”: Examining RZA and Quentin Tarantino’s Use of Pastiche." M/C Journal 16, no. 4 (2013). http://dx.doi.org/10.5204/mcj.669.

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In his directorial debut, The Man with the Iron Fists (2012), RZA not only evokes the textual borrowing techniques he has utilised as a hip-hop producer, but also reflects the influence of filmmaker Quentin Tarantino, who has built a career upon acknowledging mainstream and cult film histories through mise-en-scene, editing, and deft characterisation. The Man with the Iron Fists was originally to coincide with Tarantino’s rebel slave narrative Django Unchained (2012), which Tarantino has discussed openly as commentary regarding race in contemporary America. In 2011, Variety reported that RZA h

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