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Journal articles on the topic 'Asynchronous Transducers'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Makhsudov, Mokhirbek, and Dilyorbek Karimjonov. "Research algorithm and dynamic characteristics of three-phase electromagnetic current transducers in filter-compensation devices." E3S Web of Conferences 461 (2023): 01056. http://dx.doi.org/10.1051/e3sconf/202346101056.

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The article presents a three-phase current transducer for filter-compensation devices, representing the value of the stator current of an asynchronous motor. An algorithm for determining the values of the output electric quantities in them was developed based on the methods of interconnecting the loops of the sensitive element of the three-phase electromagnetic current transducer arranged in accordance with the stator slots of the asynchronous motor. In addition, based on this algorithm, the time-dependent dynamic characteristics of the output signal of the sensitive element loops are determin

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2

Belk, James, and Collin Bleak. "Some undecidability results for asynchronous transducers and the Brin-Thompson group $2V$." Transactions of the American Mathematical Society 369, no. 5 (2016): 3157–72. http://dx.doi.org/10.1090/tran/6963.

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Boikhanov, Z. U. "DYNAMIC CHARACTERISTICS OF CONTROLLED OUTPUT VOLTAGE CONVERTERS." Journal of Science and Innovative Development 5, no. 2 (2022): 133–39. http://dx.doi.org/10.36522/2181-9637-2022-2-14.

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This article uses a controlled output voltage-to-current converter to control the reactive power of an induction motor. The dynamic characteristics of the current converter were obtained using the Simulink program, taking into account reliability, sensitivity, measurement accuracy and error. Current converters are mainly operated during normal stable operation of the power supply system of an asynchronous motor. In this mode, when studying current transducers with certain conditional limits, the minimum and maximum values of the input current are accepted, for which the accuracy class (0.1‒1.2

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Pantalos, G. M., J. D. Marks, J. B. Riebman, N. A. Burton, R. Depaulis, and W. J. Kolff. "Hemodynamic and Energetic Assessment of Calves Implanted with a Left Ventricular Assist Device (LVAD)." International Journal of Artificial Organs 11, no. 2 (1988): 119–26. http://dx.doi.org/10.1177/039139888801100212.

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Hemodynamic and ventricular energetic parameters were measured in calves implanted with the air driven Utah Ventricular Assist Device (UVAD). Uptake site was varied to determine the effect of control mode and vacuum augmentation of filling. Uptake was drawn solely from the left atrium or combined with a left ventricular apical vent. LVAD outflow returned to the descending, thoracic aorta. Control modes examined included asynchronous pumping as well as 1:1 and 1:2 synchronous diastolic counterpulsation. The 85cc LVAD, vacuum formed from PELLETHANE®, was implanted acutely in four animals and chr

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Hans, Vinay, and Dr M. K. Bhaskar. "Comparative Studies between Phasor Measurement Units (Synchrophasors) & SCADA System." International Journal for Research in Applied Science and Engineering Technology 11, no. 11 (2023): 754–58. http://dx.doi.org/10.22214/ijraset.2023.56614.

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bstract: The increasing demand of load without considerable increase in transmission resources has posed numerous constraints and challenges in the power system monitoring and performance. Modern power system grid monitoring tools use data from remote terminal units (RTUs), protective relays, and transducers to provide information to system operators. This information is vital for the operation of the power system on a daily basis and under system contingencies. However, the method presently available to retrieve data from the devices is asynchronous and relatively slow. The asynchronous natur

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Khastsaev, Boris D., and Dmitry V. Merkushev. "Application of impedance method for research the dynamics of asynchronous motors." MATEC Web of Conferences 226 (2018): 04013. http://dx.doi.org/10.1051/matecconf/201822604013.

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One of the possible fields of application of the impedance method based on the use of impedance and its components as an informative parameter is considered. This area of work is the study and diagnosis of asynchronous motors in dynamic mode. The paper presents both a T – shaped scheme of replacement of an asynchronous motor and one of its possible mathematical models, on the basis of which conclusions were made about the feasibility of applying the impedance method for the study and diagnosis of asynchronous motors and the need to develop hardware for this method. In this regard, the main par

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Elkhooly, Mahmoud, Ahmad Elkouzi, and Rodger J. Elble. "Myorhythmia: A Quantitative Study of Synchrony and Rhythmicity Between the Head and Upper Limbs." Tremor and Other Hyperkinetic Movements 15 (April 1, 2025): 11. https://doi.org/10.5334/tohm.986.

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Background: Myorhythmia is a <4 Hz oscillatory movement disorder that has been variably described as synchronous or asynchronous between body parts and as jerky or rhythmic in appearance, but there is no published report of quantitative motion analysis. Methods: A 51-year-old woman developed disabling myorhythmia in the head and upper limbs (right>left) approximately three months after a relapse of multiple sclerosis in her brainstem and cerebellum. Head and bilateral hand motion was recorded at rest and during posture with triaxial accelerometers and gyroscopic transducers. Recordings w

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Siddikov, Ilkhomjon Khakimovich, Dilyorbek Karimjonov Doniyorbek o'g'li, and Abdumutal Abdikarimovich Abdigapirov. "RESEARCH OF THREE-PHASES CURRENT’S TRANSDUCERS OF FILTER-COMPENSATION DEVICES FOR CONTROL REACTIVE POWER’S CONSUMPTION OF ASYNCHRONOUS MOTOR." Chemical Technology, Control and Management 2023, no. 1 (2023): 35–45. http://dx.doi.org/10.59048/2181-1105.1423.

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Margielewicz, Jerzy, Damian Gąska, Grzegorz Litak, Piotr Wolszczak, and Shengxi Zhou. "Energy Harvesting in a System with a Two-Stage Flexible Cantilever Beam." Sensors 22, no. 19 (2022): 7399. http://dx.doi.org/10.3390/s22197399.

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The subject of the research contained in this paper is a new design solution for an energy harvesting system resulting from the combination of a quasi-zero-stiffness energy harvester and a two-stage flexible cantilever beam. Numerical tests were divided into two main parts-analysis of the dynamics of the system due to periodic, quasiperiodic, and chaotic solutions and the efficiency of energy generation. The results of numerical simulations were limited to zero initial conditions as they are the natural position of the static equilibrium. The article compares the energy efficiency for the sele

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Klyuyev, О., A. Sadovoi, and Y. Sokhina. "CONSTRUCTION OF ROTOR ANGLE IDENTIFIER IN VECTOR CONTROL SYSTEMS OF DOUBLE FEED MACHINES." Collection of scholarly papers of Dniprovsk State Technical University (Technical Sciences) 2, no. 39 (2021): 74–81. http://dx.doi.org/10.31319/2519-2884.39.2021.9.

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In asynchronous electric drives with vector control on the rotor, it is necessary to calculate the value of the sine and cosine of the angle of rotation of the rotor relative to the stator to form control actions. When using angle sensors, complex structural tasks can arise — placement and reliable mounting of the sensor on the shaft and, accordingly, the task of the overall layout of the unit. For high-power machines, the tasks of developing and creating the design of the sensor itself arise. If serial rotor angular position sensors can be used, the task of placing and mounting the sensor is

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McDonnall, Daniel, Gregory A. Clark, and Richard A. Normann. "Selective motor unit recruitment via intrafascicular multielectrode stimulation." Canadian Journal of Physiology and Pharmacology 82, no. 8-9 (2004): 599–609. http://dx.doi.org/10.1139/y04-047.

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Recruitment of force via independent asynchronous firing of large numbers of motor units produces the grace and endurance of physiological motion. We have investigated the possibility of reproducing this physiological recruitment strategy by determining the selectivity of access to large numbers of independent motor units through intrafascicular multielectrode stimulation (IFMS) of the peripheral nerve. A Utah Slanted Electrode Array containing 100, 0.5–1.5 mm-long penetrating electrodes was inserted into the sciatic nerve of a cat, and forces generated by the 3 heads of triceps surea in respo

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Shapovalov, O., and I. Kravets. "INFLUENCE OF THE ELECTRIC POWER SYSTEM STRUCTURE ON THE RELIABILITY OF ELECTRICAL SUPPLY OF FIRE PROTECTION SYSTEMS." Fire Safety, no. 33 (December 31, 2018): 112–16. http://dx.doi.org/10.32447/20786662.33.2018.16.

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A large number of natural and man-made emergencies occurring on the territory of Ukraine, and not only that cause deforestation of buildings, structures, objects and cities and whole districts, require the provision of fire protection systems for sources of electricity that are independent of Electricity supply of certain areas or cities and objects. Regardless of the control mode, elements of automatic fire protection systems are elements that take part in a single technological process (notifying people of danger, feeding, water, removing smoke, etc.). All systems of fire protect

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Hari, Arief Dharmawan, Yudi Ponco Wardoyo Arinto, and Sulistya Widodo Chomsin. "An asynchronous interrupt driven sampling technique for a practical monitoring system of power-line single-phase voltage and current signals." International Journal of Power Electronics and Drive Systems 14, no. 01 (2023): 233~243. https://doi.org/10.11591/ijpeds.v14.i1.pp233-243.

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A practical monitoring system implementing an asynchronous interrupt driven sampling technique has been developed in this research. This system is intended to acquire power-line single-phase voltage and current signals as well as their related information such as RMS values and harmonic contents. The system uses a voltage transformer and a current transducer to acquire the signals of the voltage and current. A microcontroller is used in the system to perform acquisition processes, calculation, and wireless data transmission. The design activities include the development of hardware of the syst

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Dharmawan, Hari Arief, Arinto Yudi Ponco Wardoyo, and Chomsin Sulistya Widodo. "An asynchronous interrupt driven sampling technique for a practical monitoring system of power-line single-phase voltage and current signals." International Journal of Power Electronics and Drive Systems (IJPEDS) 14, no. 1 (2023): 233. http://dx.doi.org/10.11591/ijpeds.v14.i1.pp233-243.

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<span lang="EN-US">A practical monitoring system implementing an asynchronous interrupt driven sampling technique has been developed in this research. This system is intended to acquire power-line single-phase voltage and current signals as well as their related information such as RMS values and harmonic contents. The system uses a voltage transformer and a current transducer to acquire the signals of the voltage and current. A microcontroller is used in the system to perform acquisition processes, calculation, and wireless data transmission. The design activities include the developmen

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Lee, Geon Woo, and Hong Kook Kim. "Two-Step Joint Optimization with Auxiliary Loss Function for Noise-Robust Speech Recognition." Sensors 22, no. 14 (2022): 5381. http://dx.doi.org/10.3390/s22145381.

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In this paper, a new two-step joint optimization approach based on the asynchronous subregion optimization method is proposed for training a pipeline model composed of two different models. The first-step processing of the proposed joint optimization approach trains the front-end model only, and the second-step processing trains all the parameters of the combined model together. In the asynchronous subregion optimization method, the first-step processing only supports the goal of the front-end model. However, the first-step processing of the proposed approach works with a new loss function to

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Huang, Yi, and Clemens Gühmann. "Wireless Sensor Network for Temperatures Estimation in an Asynchronous Machine Using a Kalman Filter." ACTA IMEKO 7, no. 1 (2018): 5. http://dx.doi.org/10.21014/acta_imeko.v7i1.509.

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<p class="Abstract">A 4<sup>th</sup>-order Kalman filter (KF) algorithm is developed based on the thermal model of an asynchronous machine. The thermal parameters are identified and KF is implemented in a wireless sensor network (WSN) to estimate the temperatures of the stator windings, the rotor cage, and the stator core of an asynchronous machine. The rotor speed, coolant air temperature, and the effective current and voltage are acquired by a WTIM (wireless transducer interface module) separately and transmitted to a NCAP (network capable application processor) where the K

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17

Guediri, Α., and Α. Guediri. "Study and Order of a Medium Power Wind Turbine Conversion Chain Connected to Medium Voltage Grid." Engineering, Technology & Applied Science Research 11, no. 3 (2021): 7279–82. http://dx.doi.org/10.48084/etasr.4169.

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In this article, we will study a system consisting of a wind turbine operating at a variable wind speed and a two-feed asynchronous machine (DFIG) connected to the grid by the stator and fed by a transducer at the rotor side. The conductors are separately controlled for active and reactive power flow between the stator (DFIG) and the network, which is achieved using conventional PI and fuzzy logic. The proposed controllers generate reference voltages for the rotor to ensure that the active and reactive powers reach the required reference values, in order to ensure effective tracking of the opt

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18

Aliev, T. A., A. M. Abbasov, G. A. Guluyev, Аs H. Rzayev, and Y. G. Aliyev. "Frequency converter-based monitoring, diagnostics and control system for artesian well pumps." Informatics and Control Problems, no. 2(6) (December 29, 2021): 52–62. http://dx.doi.org/10.54381/icp.2021.2.09.

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The article highlights the relevance of energy saving problems on a global scale and the need to regulate by state laws the production and application of frequency converters, which allow to reduce the energy consumption of asynchronous motors by 30-60% depending on the load as a result of the International Energy Agency's targeted energy policy. Different characteristics of controlling the asynchronous motor, which is the main transmission of artesian well pumps, with Straight and Frequency Transducer (Variable Frequency Transmission) from the power grid are compared; the principles of energy

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19

Siddikov, llhomjon Xakimovich, Saidikrom Saidmurodovich A'zamov, and Dilyorbek Doniyorbek o'g'li Karimjonov. "ELECTROMAGNETIC CURRENT TRANSDUCER FOR CONTROL OF REACTIVE POWER CONSUMPTION OF AN ASYNCHRONOUS MOTOR FROM A SINGLE-PHASE SUPPLY OF RENEWABLE ENERGY SOURCE." Chemical Technology, Control and Management 2023, no. 4 (2023): 21–27. http://dx.doi.org/10.59048/2181-1105.1491.

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20

Kumar, Arjun, Shivashankar, and Bhagwan S. Ram. "Efficient Solar Integrated Doubly Fed Induction Generator for Wind Energy Harnessing." Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering) 13, no. 5 (2020): 723–35. http://dx.doi.org/10.2174/2352096512666191019094707.

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Background: Doubly-Fed Induction Generator (DFIG) is a dual input conventional asynchronous device connected across both stator and rotor, which also functions as an electrical transducer consuming up-to 30 % of the generated power during the rotor injection. This is the major concern with respect to the DFIG in terms of effective power generation. Methods: The proposed work provides the solution for this undesirable power loss by connecting the DFIG with an array of solar Photovoltaic (PV) panel through a conventional direct current bus using a boost converter. This research setup can work on

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Guediri, A., A. Guediri, and S. Touil. "Modeling and Comparison of Fuzzy-PI and Genetic Control Algorithms for Active and Reactive Power Flow between the Stator (DFIG) and the Grid." Engineering, Technology & Applied Science Research 12, no. 3 (2022): 8640–45. http://dx.doi.org/10.48084/etasr.4905.

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This paper performs a comparison between Fuzzy-PI regulators and Genetic Algorithm (GA) for controlling an active and reactive Doubly-Fed Induction Generator (DFIG) for providing power to the electrical grid. Theoretical analysis, modeling, and simulation studies are provided. Control strategies were developed for both active and reactive forces in order to optimize energy production. The performance of the two control strategies was examined and compared using benchmarks for durability and reference traceability. This paper studied a system consisting of a wind turbine operating at variable w

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Shrestha, Manish Man, Bibek Ropakheti, Uddhav Bhattarai, Ajaya Adhikari, and Shreeram Thakur. "Digital Ultrasonic Sensing Device with Programmable Frequency: Development and Analysis." Advances in Engineering and Technology: An International Journal 1, no. 1 (2021): 33–45. http://dx.doi.org/10.3126/aet.v1i1.39658.

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Ultrasonic wave is widely used in Structure Health Monitoring (SHM) systems. A piezoelectric transducer (PZT) is one of the most widely used sensors to acquire the structure's ultrasonic wave. As today's world is digital, it is necessary to digitize the traditional analog PZT sensing system. This paper describes the development and analysis of a digital ultrasonic sensing device (DUSD) for PZT sensors. We removed the complexities of the analog circuit by interfacing the microcontroller directly with the charge amplifier circuit. The microcontroller used in this research is a 32-bit ARM Cortex-

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Guediri, Abdelkarim, Messaoud Hettiri, and Abdelhafid Guediri. "Modeling of a Wind Power System Using the Genetic Algorithm Based on a Doubly Fed Induction Generator for the Supply of Power to the Electrical Grid." Processes 11, no. 3 (2023): 952. http://dx.doi.org/10.3390/pr11030952.

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This paper is interested in studying a system consisting of a wind turbine operating at variable wind speeds, and a two-feed asynchronous machine (DFIG) connected to the grid by a stator and fed by a transducer at the side of the rotor. The conductors are separately controlled for active and reactive power flow between the stator (DFIG) and the grid. The proposed controllers generate reference voltages for the rotor to ensure that the active and reactive power reaches the required reference values, to ensure effective tracking of the optimum operating point and to obtain the maximum electrical

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Uma, Hariharan, Sonowal Swaraj, and Kaur Mohandeep. "Pacemaker and Geriatric Anaesthesia: A special report." International Journal of Medical Reviews and Case Reports 3, no. 6 (2018): 331–33. https://doi.org/10.5455/IJMRCR.pacemaker-geriatric-anaesthesia.

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Geriatric medicine is a full-fledged speciality nowadays. Anaesthesia for geriatric patients is quite challenging. Elderly patients with serious cardiac problems are presenting for various surgeries, warranting the anaesthesiologist to formulate tailor-made peri-operative plan of management. We hereby present a case of an elderly male patient, posted for bilateral inguinal hernioplasty having a permanent pacemaker in situ in DDDR (dual-chamber rate-modulated) mode. The patient, on preoperative examination, was found to have a complete atrioventricular (AV) block on electrocardiogram (ECG) and

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Lu, Yao, Wilson Truccolo, Fabien B. Wagner, et al. "Optogenetically induced spatiotemporal gamma oscillations and neuronal spiking activity in primate motor cortex." Journal of Neurophysiology 113, no. 10 (2015): 3574–87. http://dx.doi.org/10.1152/jn.00792.2014.

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Transient gamma-band (40–80 Hz) spatiotemporal patterns are hypothesized to play important roles in cortical function. Here we report the direct observation of gamma oscillations as spatiotemporal waves induced by targeted optogenetic stimulation, recorded by intracortical multichannel extracellular techniques in macaque monkeys during their awake resting states. Microelectrode arrays integrating an optical fiber at their center were chronically implanted in primary motor (M1) and ventral premotor (PMv) cortices of two subjects. Targeted brain tissue was transduced with the red-shifted opsin C

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Pham, Jessica, Luisa Ladel, Christina Wu, and Catriona Jamieson. "Abstract 169: Leveraging space to advance terrestrial cancer research." Cancer Research 83, no. 7_Supplement (2023): 169. http://dx.doi.org/10.1158/1538-7445.am2023-169.

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Abstract The International Space Station (ISS) offers a unique macroenvironment to study biology. The effects of microgravity in low earth orbit (LEO) can be leveraged to study pre-cancer and cancer transformation in an accelerated timeframe. Thus, we launched two cancer cell types into space as a proof of concept and to establish an innovative model for studying cancer. The two cell types are TF1a, an erythroleukemia cell line, and Caco-2, a colon cancer cell line that was cultured as organoids. These studies were performed in collaboration with Axiom Space and were launched as part of the Ax

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Kim, U. H., G. H. Suh, and I. H. Kim. "17 COMPARISON OF FOLLICULAR WAVE EMERGENCE AND FOLLICULAR DEVELOPMENT FOLLOWING ESTRADIOL BENZOATE PLUS PROGESTERONE OR GnRH AT THE FIRST FOLLICULAR WAVE IN A CIDR-TREATED, LACTATING HOLSTEIN COWS." Reproduction, Fertility and Development 17, no. 2 (2005): 158. http://dx.doi.org/10.1071/rdv17n2ab17.

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Treatment with GnRH in a controlled internal drug release (CIDR)-based timed AI protocol induced synchronized follicular wave emergence, a large ovulatory follicle, and synchronous ovulation following a second injection of GnRH, while follicular wave emergence was relatively asynchronous in the estradiol benzoate (EB)-treated cows resulting in ovulation of smaller ovulatory follicles (Kim et al. 2004 Theriogenology, in press). In this study, we compared new follicular wave emergence and follicular development following treatment with EB plus progesterone (P4) or GnRH at the first follicular wa

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Kim, U. H., G. H. Suh, and I. H. Kim. "235 FOLLICULAR WAVE EMERGENCE AND DEVELOPMENT FOLLOWING ESTRADIOL PLUS PROGESTERONE AT A GROWING OR A STATIC PHASE OF THE DOMINANT FOLLICLE IN CIDR-TREATED, LACTATING DAIRY COWS." Reproduction, Fertility and Development 18, no. 2 (2006): 225. http://dx.doi.org/10.1071/rdv18n2ab235.

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Treatment with estradiol benzoate (EB), compared to GnRH, in a controlled internal drug release (CIDR)-based timed AI protocol induced relatively asynchronous follicular wave emergence, resulting in ovulation of smaller ovulating follicles (Kim et al. 2005 Theriogenology 63, 260-268). In this study, we compared new follicular wave emergence and development following treatment with EB (2 mg) plus progesterone (50 mg) at a growing (Day 3 after ovulation) or a static (Day 8) phase of the dominant follicle during the first follicular wave in CIDR-treated, lactating dairy cows. Previously synchroni

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Pitari, Maria Rita, Marco Rossi, Cirino Botta, et al. "Inhibition Of Mir-21 In HS-5 Bone Marrow Stromal Cells In The Presence Of Multiple Myeloma cells Restores RANKL/OPG Ratio: A Potential Therapeutic Approach For Myeloma-Related Bone Disease." Blood 122, no. 21 (2013): 683. http://dx.doi.org/10.1182/blood.v122.21.683.683.

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Abstract Multiple Myeloma (MM)-related osteolytic lesions of the skeleton result from asynchronous bone turnover wherein increased bone resorption by osteoclasts (OCLs) is associated to suppression of bone formation due to inhibition of osteoblasts (OBLs). In this context, the balance between osteoprotegerin (OPG) and the receptor activator for nuclear factor-κB ligand (RANKL) plays a relevant role, because RANKL signaling induces differentiation, activation and survival of OCLs, whereas OPG acts as a decoy receptor of RANKL, thus blocking bone resorption. In the MM milieu, the interaction of

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Zhou, Yuhua, Wei Fan, Hui Tang, et al. "Measurement insights and error analysis of electronic parameters for ultrasonic transducers." Measurement Science and Technology, May 10, 2024. http://dx.doi.org/10.1088/1361-6501/ad49bd.

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Abstract Piezoelectric ultrasonic transducers with the function of energy conversation, as well as their numerous advantages, such as high-power density, quick response, flexible design, and service reliability, are involved in wide applications of industrial processing, precision driving, smart sensing, and medical services. The electromechanical equivalent circuit and Kirchhoff’s law indicate that mechatronics parameters are essential for performance evaluation, reliability analysis, and fault diagnosis of ultrasonic transducers. Importantly, the ultrasonic transducer is a time variant syste

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Makhsudov, Mokhirbek, and Dilyorbek Karimjonov. "Three-phase electromagnetic current transducers of asynchronous motor reactive power filter-compensation device." November 4, 2024. https://doi.org/10.5281/zenodo.14032828.

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<strong>Relevance:</strong> currently, semiconductor elements are widely used in the control and management of electrical devices, which leads to an increase in the number of symmetrical and non-sinusoidal currents affecting the quality of electricity. Symmetrical and non-sinusoidal currents also negatively affect the increase in the reactive power of electrical installations, overheating, reduced operational efficiency and the operability of other devices in the network. It is important to ensure that the value of symmetrical and non-sinusoidal currents does not exceed the values set by the s

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Soltani Dehkharqani, Arash, Fredrik Engström, Jan-Olov Aidanpää, and Michel J. Cervantes. "Experimental Investigation of a 10 MW Prototype Axial Turbine Runner: Vortex Rope Formation and Mitigation." Journal of Fluids Engineering 142, no. 10 (2020). http://dx.doi.org/10.1115/1.4047793.

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Abstract The transient load fluctuations on the runner blades of prototype hydraulic turbines during load variations are one of the main causes of fatigue and eventual structural failure. A clear understanding of the dynamic loads on the runner blades is required to detect the source of the fluctuations. In this paper, an experimental investigation of vortex rope formation and mitigation in a prototype Kaplan turbine, namely, Porjus U9, is carried out. Synchronized unsteady pressure and strain measurements were performed on a runner blade during steady-state and load variation under off-cam co

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Bucci, Giovanni, Fabrizio Ciancetta, Edoardo Fiorucci, Antonio Ometto, and Maria Anna Segreto. "A Simplified Indirect Technique for the Measurement of Mechanical Power in Three-Phase Asynchronous Motors." International Journal of Emerging Electric Power Systems 20, no. 2 (2019). http://dx.doi.org/10.1515/ijeeps-2018-0284.

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Abstract This paper presents an indirect method for measuring the mechanical power produced by three-phase induction motors. The proposed technique is based on the hypothesis that three-phase induction motors are balanced systems that transform electrical power into mechanical one. The measurement of a single phase current is used to estimate the mechanical power generated at the axis. The relationship between electric current and mechanical power is generally non-linear. By expressing the quantities in p.u., this trend is approximated with a second order polynomial. From the analysis of the m

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Matsuda, Osamu, Shohei Ueno, Motonobu Tomoda, Paul H. Otsuka, and Oliver B. Wright. "Time-resolved imaging of GHz acoustic vibrations at arbitrary frequencies using asynchronous periodic probe laser pulses." Applied Physics Letters 125, no. 5 (2024). http://dx.doi.org/10.1063/5.0218494.

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We present a technique for imaging gigahertz surface acoustic waves in the time domain at arbitrary frequencies, in which acoustic waves are excited asynchronously to the optical probe pulse train used to detect them. We apply this approach to the two-dimensional imaging of electrically excited single-frequency surface acoustic waves on a GaAs substrate with a deposited interdigital transducer. This technique significantly increases the possible fields of application for gigahertz acoustic wave device imaging.

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Syms, R. R. A., and Aiman Noorwali. "Polyphase Codes for Multiplexed Acoustic Signalling and Sensing on Pipes." Smart Materials and Structures, July 22, 2022. http://dx.doi.org/10.1088/1361-665x/ac8385.

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Abstract Transmission of acoustic signals between distributed sensor nodes may be useful for status monitoring of elongated structures such as pipelines. In principle, coded signals can be used in an asynchronous multiplexed system, provided the signals are distinguishable. However, multimode effects complicate signal propagation, so any such codes should be short. A search for polyphase code families with properties suitable for acoustic code division multiple access (CDMA) is presented. Algorithms for reduction of search space to allow use of a laptop for code discovery are described. Short

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Fan, Jinqi, Nam Kyun Kim, Natasha Fernandez, Minji Shin та Hee Cho. "Abstract 16737: Inhibition of Tgf-β1 Signaling Protect Against Cell-Cell Decoupling and Asynchronous Automaticity of Tbx18-ipms". Circulation 142, Suppl_3 (2020). http://dx.doi.org/10.1161/circ.142.suppl_3.16737.

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Background: We have previously demonstrated that TBX18 suffices to reprogram postnatal ventricular cardiomyocytes to induced pacemaker cells (TBX18-iPMs). However, the nascent automaticity appeared to wane over time, characterized by loss of syncytial pacing but preservation of single cell automaticity. Hypothesis: Based on increase in Tgfβ ligands in TBX18-iPMs and the known role of Tgfβ signaling in electrical remodeling, we hypothesized that loss of syncytial automaticity is due to electrical decoupling of the iPMs mediated by Tgfβ signaling. Methods: Adenoviral vectors expressing either hu

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Abdullayev, Muhammadsayfullo. "RESEARCH OF THE DYNAMIC CHARACTERISTICS OF THREE-PHASE ELECTROMAGNETIC CURRENT TRANSDUCER FOR FILTER-COMPENSATION DEVICE OF ASYNCHRONOUS MOTOR REACTIVE POWER." Universum:Technical sciences 107, no. 2 (2023). http://dx.doi.org/10.32743/unitech.2023.107.2.15042.

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Barakat, Assem, Saeed Alshahrani, Abdullah Mohammed Al-Majid, et al. "Activation of p53 signaling and regression of breast and prostate carcinoma cells by spirooxindole-benzimidazole small molecules." Frontiers in Pharmacology 15 (April 8, 2024). http://dx.doi.org/10.3389/fphar.2024.1358089.

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This study discusses the synthesis and use of a new library of spirooxindole-benzimidazole compounds as inhibitors of the signal transducer and activator of p53, a protein involved in regulating cell growth and cancer prevention. The text includes the scientific details of the [3 + 2] cycloaddition (32CA) reaction between azomethine ylide 7a and ethylene 3a within the framework of Molecular Electron Density Theory. The mechanism of the 32CA reaction proceeds through a two-stage one-step process, with emphasis on the highly asynchronous transition state structure. The anti-cancer properties of

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Tumminia, Matteo, Dario Valentini, Giovanni Pace, et al. "Maximum Likelihood Identification of Cavitation Instabilities in Axial Inducers." Journal of Fluids Engineering, September 3, 2022. http://dx.doi.org/10.1115/1.4055473.

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Abstract The article illustrates the results of an exploratory study on the effectiveness of maximum likelihood Bayesian estimation in the identification of cavitation instabilities in axial inducers using the blade-to-blade pressure measured by a single transducer flush-mounted on the impeller casing. The typical azimuthal distribution of the pressure in the blade channels is parameterized and modulated in space and time for theoretically reproducing the expected pressure generated by known forms of cavitation instabilities (cavitation surge auto-oscillations, n-lobed synchronous/asynchronous

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Mehta, Natasha, J. Yasha Kresh, Steven P. Kutalek, Peter A. Lewin, and Andrew R. Kohut. "Abstract 158: Ultrasound-Induced Inhibition and Modulation of Neonatal Ventricular Cardiomyocyte Depolarization." Circulation Research 115, suppl_1 (2014). http://dx.doi.org/10.1161/res.115.suppl_1.158.

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Background: Ultrasound can interact with tissue through either thermal or non-thermal physical mechanisms. Radiation force has been shown to stimulate cardiac and neural tissue in vivo. Ultrasound might hold clinical potential as a noninvasive therapeutic tool via specific bioeffects on cardiomyocytes. This study aims to assess the effect of ultrasound on cardiomyocyte depolarization in a tissue culture model. Methods: Cardiomyocytes were isolated from neonatal rat ventricular tissue and plated directly on microelectrode arrays to record depolarization patterns. A custom 2.5 MHz unfocused ultr

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Pardo, Anat, Shir Nahum Fridland, Or Lee Rak, et al. "Fetal heart rate and amniotic fluid volume measurements with a home ultrasound device." American Journal of Perinatology, November 19, 2024. http://dx.doi.org/10.1055/a-2469-0887.

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Objective: Pulsenmore ES is a self-scanning ultrasound system for remote fetal assessment. It is composed of a hand-held transducer that serves as a smartphone cradle coupled with an application and clinician’s web-viewer dashboard. Recently, a novel capability was added to the system allowing for offline fetal heart rate (FHR) and maximal vertical pocket (MVP) measurements. The aim of this study was to evaluate these tools for usability and accuracy. Study Design: A prospective, non-randomized, non-blinded clinical study design was used. Pulsenmore ES scans were obtained by non-professional l

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Wilken, Rowan. "Walkie-Talkies, Wandering, and Sonic Intimacy." M/C Journal 22, no. 4 (2019). http://dx.doi.org/10.5204/mcj.1581.

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IntroductionThis short article examines contemporary artistic use of walkie-talkies across two projects: Saturday (2002) by Sabrina Raaf and Walk That Sound (2014) by Lukatoyboy. Drawing on Dominic Pettman’s notion of sonic intimacy, I argue that both artists incorporate walkie-talkies as part of their explorations of mediated wandering, and in ways that seek to capture sonic ambiances and intimacies. One thing that is striking about both these works is that they rethink what’s possible with walkie-talkies; both artists use them not just as low-tech, portable devices for one-to-one communicati

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