Relevant bibliographies by topics / Electric field meter

Academic literature on the topic 'Electric field meter'

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Published: 6 September 2023

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Journal articles on the topic "Electric field meter"

1

Bordonskii, G. S., and S. D. Krylov. "A Quasistatic Electric Field Meter." Instruments and Experimental Techniques 46, no. 6 (November 2003): 832–33. http://dx.doi.org/10.1023/b:inet.0000008941.52605.b5.

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Adzhiev, A. H., E. A. Korovin, S. V. Chernyshev, G. G. Shchukin, and D. D. Kuliev. "An atmospheric electric field meter." Instruments and Experimental Techniques 60, no. 5 (September 2017): 733–36. http://dx.doi.org/10.1134/s0020441217050013.

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Tokatly, V. I. "Electric field meter with dipole antenna in an alternating nonuniform electric field." Measurement Techniques 35, no. 11 (November 1992): 1335–43. http://dx.doi.org/10.1007/bf01821927.

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Ivaška, Vladislovas, and Vytautas Jonkus. "Electric field modelling for wood moisture meter." Lithuanian Journal of Physics 44, no. 4 (2004): 259–62. http://dx.doi.org/10.3952/lithjphys.44403.

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Buzinov, V. S., N. N. Iskhakova, and V. A. Tishchenko. "Reference wide-band electric-field intensity meter." Measurement Techniques 33, no. 10 (October 1990): 1035–37. http://dx.doi.org/10.1007/bf00990526.

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Tokatly, V. I. "Electric field meter with a dipole antenna in a nonuniform alternating electric field." Measurement Techniques 35, no. 12 (December 1992): 1424–29. http://dx.doi.org/10.1007/bf00976889.

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Tokatly, V. I. "Electric field meter with a dipole antenna in an elliptically polarized electric field." Measurement Techniques 37, no. 2 (February 1994): 193–98. http://dx.doi.org/10.1007/bf00979213.

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8

Strasser, Ryan, Sylvester Badua, Ajay Sharda, Devin Mangus, and Lucas Haag. "Performance of Planter Electric-drive Seed Meter during Simulated Planting Scenarios." Applied Engineering in Agriculture 35, no. 6 (2019): 925–35. http://dx.doi.org/10.13031/aea.13763.

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Highlights. Seed meter rpm error decreased with increasing planter speed during steady states.Point-row operations could result in up to 10-13 seeds being over- or under-planted.Seed meter rpm error varied from -7.2% to 7.9% during curve planting transient states. Abstract. Electric drive seed metering systems have become a common method for singulating row crop seed. These singulation systems have substantially fewer moving parts and can potentially respond more quickly than other drive mechanisms. However, the accuracy and response time of these systems has yet to be examined to quantify potential benefits of adoption. The objectives of this study were (1) to quantify accuracy and response time of electric meter drives to varying ground speeds and speed transitions during in-lab simulation planting operations on straight-line and curves, and (2) to compare actual seed meter motor speed to target meter speed during simulation field scenarios. To quantify metering system performance, test scenarios were developed to simulate planting on headlands, within field boundaries including traversing in-field obstacles, and planting on curves with different radii. Ground speeds during simulation scenarios were 7.2, 12.9, and 16.1 kph when operating on straight rows and 6.0, 8, 11, and 14.5 kph when planting along curvilinear paths. Test scenarios also included planter acceleration and deceleration at 0.4 and 0.6 m/s2 when traversing in-field obstacles and tighter radii curves. Tests were conducted with two different seeding rates, 44,460 and 88,920 seeds/ha. Eight high frequency encoders were mounted on the electric meters of selected row units to record real-time meter rpm and quantify seed meter accuracy and response time. A custom DAQ system was developed to read simulation test scenario data files in ASCII text file format and send prescribed ground speed commands to the Horsch Maestro 24.30 planter’s ECU at 10 Hz using a program written in LabVIEW. Results indicated that seed metering accuracy increased as ground speed increased resulting in a significantly lower seed meter rpm error at 16.1 kph under steady-state conditions. During transient states, seed meters needed 3 to 4 s to respond during deceleration and acceleration resulting to seed meter rpm error ranging from -3.7% to 3.6% at 44,460 seeds/ha seeding rate and from -3.8% to 3.2% at 88,920 seeds/ha seeding rate. During point-row operations, the response time of the meters was 0.4 s which could result in up to 10 seeds being under-planted and up to 13 seeds being over-planted per row unit. During curvilinear planting, seed meter rpm error for steady states ranged from -0.5% to 0.8% across varying turn radii resulting to seeding rate error ranging from -223 to 370 seeds/ha while during transient states seed meter rpm error varied from -7.2% to 7.9% resulting to seeding rate error ranging from -5,886 to 7,187 seeds/ha. Keywords: Seed meter rpm, Seeding rate error, Simulation, Variable rate planting, Planter meter.
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Johnston, A. R., and H. Kirkham. "A miniaturized space-potential DC electric field meter." IEEE Transactions on Power Delivery 4, no. 2 (April 1989): 1253–61. http://dx.doi.org/10.1109/61.25611.

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Johnston, Alan R., Harold Kirkham, and Bjorn T. Eng. "dc electric field meter with fiber‐optic readout." Review of Scientific Instruments 57, no. 11 (November 1986): 2746–53. http://dx.doi.org/10.1063/1.1139037.

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Dissertations / Theses on the topic "Electric field meter"

1

Cover, Keith Sean. "The fluxgate electric field meter : a feasibility study." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/25865.

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The fluxgate electric field meter is a new solid-state instrument capable of measuring slowly varying electric fields equally well in an insulating or conducting medium with high resolution. The field meter determines the strength of an electric field by measuring the potential difference between two insulated electrodes immersed in the electric field. The electrode insulation is important because it eliminates the contact potential noise between the conductive material of the electrode and a conductive medium. The capacitance of the insulated electrodes is of the order of 10pF; therefore measurement of the potential difference between the electrodes requires an electrometer with extremely low bias current and high input resistance. A novel electrometer was concieved and designed to accomplish this task. The new electrometer is a solid-state analogue of the vibrating-capacitor electrometer and is claimed to have zero bias current. MOS capacitors are substituted for the vibrating capacitor. The noise level for the crude, proof-of-concept electrometer was 220μVHz[sup -1/2] at 1Hz. This noise level is only 20 dB worse than the best commerical device I could locate. A crude, proof-of-concept electric field meter constructed with the electrometer had a high frequency cutoff of 150Hz and low frequency cutoff of 100μHz. Possible applications of the fluxgate electric field meter include measurement of atmospheric and interplanetary electric fields, measurement of static charge buildup, and geophysical surveys.
Science, Faculty of
Earth, Ocean and Atmospheric Sciences, Department of
Graduate
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2

Shafran, John Sawa. "A MEMS-based, high-resolution Electric-Field meter." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33358.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2005.
Includes bibliographical references (p. 169-172).
In MEMS-based inertial sensors, such as accelerometers and gyroscopes, known electrical waveforms are applied to a modulating capacitive element to determine an unknown deflection. However, the inverse of this scheme can also be exploited - the capacitive element can be deterministically modulated to measure an electrostatic variable. This thesis presents the design, analysis, and evaluation of such a sensor -a MEMS-based, high-resolution electrostatic field-meter (ESF) - using the Analog Devices iMEMS process. High-resolution sensing is achieved by optimizing the interface electronics for low-noise operation and applying feedback techniques to enhance the range-of-motion of the MEMS capacitive structure. The entire system consists of three components: the MEMS capacitive structure and two circuit subsystems - the sense block and the drive loop. The MEMS structure acts as a transducer to generate a dynamic current that is proportional to the magnitude and polarity of the electric field incident on the sensor. The drive loop is a closed feedback loop that modulates the MEMS capacitive structure at its resonant frequency to maximize its displacement and the magnitude of the dynamic current. The sense block ultimately converts the dynamic current into a dc voltage that is proportional to the magnitude and polarity of the incident electric field. The critical, front-end component of the sense block, a transimpedance amplifier, is implemented with a low-noise operational amplifier for optimum sensing resolution.
by John Sawa Shafran.
M.Eng.
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3

Ryan, D. T. "Critical currents of commercial superconductors in the picovolt per metre electric field regime." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242036.

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Líšková, Ivana. "Stanovení geotechnických vlastností zemin s využitím metody Elektrické impedanční spektrometrie." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265699.

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This diploma thesis deals with determination of geotechnical properties of soils with using method of electrical impedance spectrometry (EIS). For measurement was used device Z-meter of 3rd generation, which was developed with projects of international program of applied research EUREKA. Experiment was realized in Laboratory of soil mechanics in GEOtest a.s. in Brno.
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Argirevic, Tomislav [Verfasser], Marina [Akademischer Betreuer] Bennati, and Franc [Akademischer Betreuer] Meyer. "High-field EPR and ENDOR spectroscopy for proton-coupled electron transfer investigations in E.coli ribonucleotide reductase / Tomislav Argirevic. Gutachter: Marina Bennati ; Franc Meyer. Betreuer: Marina Bennati." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2012. http://d-nb.info/104393684X/34.

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6

Sethupathy, S. "Stable Galerkin Finite Element Formulation for the Simulation of Electromagnetic Flowmeter." Thesis, 2016. http://hdl.handle.net/2005/3068.

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Electromagnetic flow meters are simple, rugged, non-invasive flow measuring instruments, which are extensively employed in many applications. In particular, they are ideally suited for the flow rate measurement of liquid metals, which serve as coolants in fast breeder reactors. In such applications, theoretical evaluation of the sensitivity turns out to be the best possible choice. Invariably, an evaluation of the associated electromagnetic fields forms the first step. However, due to the complexity of the problem, only numerical field computational approach would be feasible. In the pertinent literature, couple of e orts could be found which employ the well-known Galerkin Finite Element Method (GFEM) for the required task. However, GFEM is known to suffer from the numerical stability problem even at moderate flow rates. This problem is quite common in fluid dynamics area and several stabilization schemes have been suggested as a remedial measure. Among such schemes, the Streamline Upwinding Petrov Galerkin (SU/PG) method is a simple and widely employed approach. The same has been adopted in some of the moving conductor literatures for obtaining a stable solution. Nevertheless, in fluid dynamics literature, it has been shown that the SU/PG solution can suffer from distortion/peaking at the boundary. The remedial measures proposed are nonlinear in nature and hence are computationally demanding. Also, even the SU/PG scheme by itself requires significant additional computation for quadratic and higher order elements. Further, the value of stabilization parameter is not accurately known for 2D and 3D problems. The present work is basically an attempt to address the above problem for flow meter and other rectilinearly moving conductor problems. More specifically, but for the requirement of (graded) structured mesh along the flow direction, it basically aims to address a more general class of problems not just limited to the flow meter. Following the classical approach employed in fluid dynamics literature, first the problem is studied in its 1D form. It was observed that a relatively better performance of GFEM over FDM scheme is basically due to the difference in their Right Hand Side (RHS) terms, which represents the applied magnetic field. Taking clue from this, it was envisaged that a better insight to the numerical problem can be obtained by using the control system theory's transfer function approach. An application of FDM or GFEM to the 1D form of the governing equation, leads to flalge-braic equations with space variable in discrete form. Hence, a Z-transform based approach is employed to relate the applied magnetic field to the vector potential of the resulting reaction magnetic field. It is then shown that the presence of a pole at Z = -1 is basically responsible for the oscillations in the numerical solution. It is then proposed that by using the control systems pole-zero cancellation principle, stability can be brought into the numerical solution. This requires suitable modification of RHS terms in the discretised equations and accordingly, two novel schemes have been proposed which works within the framework of GFEM. In author's considered opinion, the use of Z-transform for analysing the stability of the numerical schemes and the idea of employing pole-zero cancellation to bring in stability, are first of its kind. In the first of the proposed schemes, the pole-zero cancellation is achieved by simply restating the input magnetic field in terms its vector potential. Solving the difference equations given by the application of FDM or GFEM to 1D version of the governing equation, it is analytically shown that the proposed scheme is absolutely stable at high flow rates. However, at midrange of flow rates there is a small error, which is analytically quantified. Then the scheme is applied to the original flow meter problem which has only axially varying applied field and the stability is demonstrated for an extensive range of flow rates. Note that the discretisation along the flow direction was restricted in the above exercise to graded regular mesh, which can readily be realised for problems involving rectilinearly moving conductors. In order to cater for more general cases in which the applied field varies in both axial and transverse directions, a second scheme is developed. Here the RHS term representing the input magnetic field is considered in a generic weighted average form. The required weights are evaluated by imposing apart from the need for an essential zero yielding term, the flux preservation and other symmetry conditions. The stability of this scheme is proven analytically for both 1D and 2D version of the problem using respectively, the 1D and 2D Z-transform based approaches. The analytical inferences are adequately validated with numerical exercises. Also, the small error present for the midrange of flow rates is analytically quantified. Then the second scheme is applied to the actual flow meter with a general magnetic field pro le. The proposed scheme is shown to be very stable and accurate even at very high flow rates. As before, the discretisation was restricted to graded regular mesh along the flow direction. By solving for the standard TEAM No. 9 benchmark problem, applicability of the second scheme for other rectilinearly moving conductor problem has been adequately demonstrated. Even though the problems considered in this work readily permits the use of a graded regular mesh along the flow direction, for the sake of completeness, discretisation with arbitrary quadrilateral and triangular mesh is also considered. The performance of the proposed schemes for such cases even though found to deteriorate, is still shown to be considerably better than the GFEM. In summary, this work has successfully proposed two novel, computationally effcient and stable GFEM schemes for the simulation of electromagnetic flow meters and other rectilin early moving conductor problems.
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Books on the topic "Electric field meter"

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Thoday, R. D. C. Electric field strength meters for the HF, VHF, and UHF bands. London: BBC, 1990.

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2

A, Johnston, and United States. National Aeronautics and Space Administration., eds. Magnetic and electric field meters developed for the U.S. Department of Energy. [Washington, DC: National Aeronautics and Space Administration, 1989.

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H, Kirkham, and Jet Propulsion Laboratory (U.S.), eds. AC and DC electric field meters developed for the U.S. Department of Energy. Pasadena, Calif: The Laboratory, 1987.

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United States. National Aeronautics and Space Administration., ed. Ion drift meter research: Final report 1 January 1992 - 31 December 1993. Richardson, TX: The University of Texas at Dallas, 1994.

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5

IEEE Power Engineering Society. Transmission and Distribution Committee. IEEE Recommended Practice for Instrumentation: Specifications for Magnetic Flux Density and Electric Field Strength Meters-10Hz to 3Khz (Ieee Std 1308-1994). Inst of Elect & Electronic, 1995.

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Book chapters on the topic "Electric field meter"

1

Guo, Yan, Lan Su, Zhenyu Chen, Zhiguo Wen, Zhenjiang Pang, Zheng Wang, and Jian Du. "The Detection Method of High Frequency Electromagnetic Field for the Malicious Use of Electric Energy Meters." In Application of Intelligent Systems in Multi-modal Information Analytics, 522–28. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-74814-2_74.

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Schierding, C., D. Möckel, M. Thedens, M. Beyer, and M. Kurrat. "Further Developments of Metrological and Simulation-Based Characterization of the Non-contact Measurement of Electrostatic Charge by Means of Electric Field Meters." In Lecture Notes in Electrical Engineering, 55–66. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31676-1_6.

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Sun, Ying, Zhipeng Su, Qiong Wu, Feiou Yu, Ying Zhao, and Enzhen Hou. "Clock Synchronization Methods of Electric Meters Based on Wireless Communication." In Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde220015.

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Aiming at the inaccurate clock calibration of electric meters and the shortcomings of traditional clock synchronization methods, this article briefly summarizes the reasons of inaccurate meter clocks, and proposes a method of electric meter clock calibration based on wireless communication, which solves the problem of meter clock synchronization accuracy. It is verified by field test. The test results show that the error of electric meters clock after clock calibration can be controlled at the second level. And the data error of collected import active electrical energy is smaller, which meets the requirements of real-time analysis of electricity spot trading and other businesses, providing more accurate data to ensure the results reliability.
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Newnham, Robert E. "Magnetic phenomena." In Properties of Materials. Oxford University Press, 2004. http://dx.doi.org/10.1093/oso/9780198520757.003.0016.

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In this chapter we deal with a number of magnetic properties and their directional dependence: pyromagnetism, magnetic susceptibility, magnetoelectricity, and piezomagnetism. In the course of dealing with these properties, two new ideas are introduced: magnetic symmetry and axial tensors. Moving electric charge generates magnetic fields and magnetization. Macroscopically, an electric current i flowing in a coil of n turns per meter produces a magnetic field H = ni amperes/meter [A/m]. On the atomic scale, magnetization arises from unpaired electron spins and unbalanced electronic orbital motion. The weber [Wb] is the basic unit of magnetic charge m. The force between two magnetic charges m1 and m2 is where r is the separation distance and μ0 (=4π×10−7 H/m) is the permeability of vacuum. In a magnetic field H, magnetic charge experiences a force F = mH [N]. North and south poles (magnetic charges) separated by a distance r create magnetic dipole moments mr [Wb m]. Magnetic dipole moments provide a convenient way of picturing the atomistic origins arising from moving electric charge. Magnetization (I) is the magnetic dipole moment per unit volume and is expressed in units of Wb m/m3 = Wb/m2. The magnetic flux density (B = I + μ0H) is also in Wb/m2 and is analogous to the electric displacement D. All materials respond to magnetic fields, producing a magnetization I = χH, and a magnetic flux density B = μH where χ is the magnetic susceptibility and μ is the magnetic permeability. Both χ and μ are in henries/m (H/m). The permeability μ = χ + μ0 and is analogous to electric permittivity. χ and μ are sometimes expressed as dimensionless quantities (x ̅ and μ ̅ and ) like the dielectric constant, where = x ̅/μ0 and = μ ̅/μ0. Other magnetic properties will be defined later in the chapter. A schematic view of the submicroscopic origins of magnetic phenomena is presented in Fig. 14.1. Most materials are diamagnetic with only a weak magnetic response induced by an applied magnetic field.
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Gupta, Rupal, and Ruchika Gupta. "Challenges and Opportunities for Smart Meters in Smart Cities of India Using Machine Learning and Deep Learning." In Advances in Electronic Government, Digital Divide, and Regional Development, 41–47. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-9710-1.ch003.

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The current era has been filled with the data and information, crawling around the web and being utilized in the best way to produce smartness. The same concept has been used for developing smart cities by increasingly deploying IoT sensor devices to collect the data from various fields. There are numerous opportunities in these fields that are related to streaming IoT data, cloud service, computer vision, and machine learning. Simultaneously, there are lots of challenges while implementing the solutions at various locations. This chapter highlights various challenges and opportunities in electricity meter consumption and billing. In this chapter, a Python-based model has been proposed for smart electricity meter for taking the reading from commercial/residential meters and producing the electricity bills smartly. Challenges for the customers will be handled by frequently monitoring the reading from the meters and reporting issues if any directly to the concerned authority. This will definitely help specially the commercial consumers to rectify their issues.
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"Invasive Asian Carps in North America." In Invasive Asian Carps in North America, edited by Richard E. Sparks, Traci L. Barkley, Sara M. Creque, John M. Dettmers, and Karen M. Stainbrook. American Fisheries Society, 2011. http://dx.doi.org/10.47886/9781934874233.ch10.

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<em>Abstract</em>.—In 1990, the U.S. Congress authorized the Army Corps of Engineers to study barriers to prevent the downstream movement of round gobies <em>Apollonia </em>(formerly <em>Neogobius</em>) <em>melanostomus </em>and other harmful, invasive fishes from southern Lake Michigan through the Chicago canal system into the Illinois River (a tributary of the Mississippi River). A demonstration electric barrier was activated too late (April 18, 2002) to block the gobies, but it was the only barrier to upstream movement of Asian carps from the Illinois River to Lake Michigan and provided useful information for design of a second, improved barrier (Barrier 2). We surgically implanted combined radio-and-acoustic transmitters in 130 common carp <em>Cyprinus carpio </em>that we released 20 m downstream of the demonstration barrier in the Chicago Sanitary and Ship Canal to assess the ability of the barrier to prevent upstream passage of fish. Movements of these fish were monitored from April 2002 through December 2006, within and beyond the 8.7-km reach bounded upstream by the electric barrier and downstream by the Lockport Dam and Lock. Fixed hydrophones and radio antennas continuously monitored the canal immediately upstream and downstream of the barrier for signals from the transmitters. In addition, 32 surveys were conducted with boat-mounted receivers to locate transmitters that were out of range of the fixed receivers. The fixed receivers detected 109 of the 130 transmitters; most detections occurred within a few days after release of the fish. The tracking boat located 120 of the transmitters at least once and 100 at least twice. Most of the transmitters remained well downstream of the barrier and upstream of the lock, but one moved downstream beyond the lock, one passed upstream through the barrier, four moved upstream within 60–400 m of the barrier after moving downstream, and three remained at the release point for their entire battery life, indicating that the fish had died or the transmitters had been expelled. On two occasions, common carp were visually observed within half a meter of the surface (the limit of visibility) at the barrier. These fish were not observed to move beyond the downstream margin of the electric field. The traverse of the barrier on April 3, 2003 occurred at the same time as a tow was passing. A tow consists of steel barges that are lashed together and pushed by a diesel-powered boat. The tow may have facilitated the passage of the fish, either by entraining the fish or by distorting the electric field. The tracking boat detected the transmitter upstream of the barrier on April 10, 2003. The transmitter did not move more than 100 m during the remaining life of the transmitter, indicating that the fish was probably dead. After we reported the passage, Smith-Root, Inc. (operators of the electric barrier, under contract to the U.S. Army Corps of Engineers) increased the duty cycle of the electric field by fivefold. We did not detect any further passages of transmitters, suggesting that the existing electric field (Barrier 1) prevented upstream movement of adult common carp and that the new, improved barrier, in combination with Barrier 1, may be effective against the more recently introduced Asian carps. The response of Asian carps to electric barriers still needs further study because the behavior of the Asian carps differs from common carp. Also, there are ways these carps could bypass Barriers 1 and 2 that need to be addressed. These potential bypasses may explain the recent detections of DNA shed from these carps in canal water upstream from the barriers.
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"Invasive Asian Carps in North America." In Invasive Asian Carps in North America, edited by Richard E. Sparks, Traci L. Barkley, Sara M. Creque, John M. Dettmers, and Karen M. Stainbrook. American Fisheries Society, 2011. http://dx.doi.org/10.47886/9781934874233.ch10.

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<em>Abstract</em>.—In 1990, the U.S. Congress authorized the Army Corps of Engineers to study barriers to prevent the downstream movement of round gobies <em>Apollonia </em>(formerly <em>Neogobius</em>) <em>melanostomus </em>and other harmful, invasive fishes from southern Lake Michigan through the Chicago canal system into the Illinois River (a tributary of the Mississippi River). A demonstration electric barrier was activated too late (April 18, 2002) to block the gobies, but it was the only barrier to upstream movement of Asian carps from the Illinois River to Lake Michigan and provided useful information for design of a second, improved barrier (Barrier 2). We surgically implanted combined radio-and-acoustic transmitters in 130 common carp <em>Cyprinus carpio </em>that we released 20 m downstream of the demonstration barrier in the Chicago Sanitary and Ship Canal to assess the ability of the barrier to prevent upstream passage of fish. Movements of these fish were monitored from April 2002 through December 2006, within and beyond the 8.7-km reach bounded upstream by the electric barrier and downstream by the Lockport Dam and Lock. Fixed hydrophones and radio antennas continuously monitored the canal immediately upstream and downstream of the barrier for signals from the transmitters. In addition, 32 surveys were conducted with boat-mounted receivers to locate transmitters that were out of range of the fixed receivers. The fixed receivers detected 109 of the 130 transmitters; most detections occurred within a few days after release of the fish. The tracking boat located 120 of the transmitters at least once and 100 at least twice. Most of the transmitters remained well downstream of the barrier and upstream of the lock, but one moved downstream beyond the lock, one passed upstream through the barrier, four moved upstream within 60–400 m of the barrier after moving downstream, and three remained at the release point for their entire battery life, indicating that the fish had died or the transmitters had been expelled. On two occasions, common carp were visually observed within half a meter of the surface (the limit of visibility) at the barrier. These fish were not observed to move beyond the downstream margin of the electric field. The traverse of the barrier on April 3, 2003 occurred at the same time as a tow was passing. A tow consists of steel barges that are lashed together and pushed by a diesel-powered boat. The tow may have facilitated the passage of the fish, either by entraining the fish or by distorting the electric field. The tracking boat detected the transmitter upstream of the barrier on April 10, 2003. The transmitter did not move more than 100 m during the remaining life of the transmitter, indicating that the fish was probably dead. After we reported the passage, Smith-Root, Inc. (operators of the electric barrier, under contract to the U.S. Army Corps of Engineers) increased the duty cycle of the electric field by fivefold. We did not detect any further passages of transmitters, suggesting that the existing electric field (Barrier 1) prevented upstream movement of adult common carp and that the new, improved barrier, in combination with Barrier 1, may be effective against the more recently introduced Asian carps. The response of Asian carps to electric barriers still needs further study because the behavior of the Asian carps differs from common carp. Also, there are ways these carps could bypass Barriers 1 and 2 that need to be addressed. These potential bypasses may explain the recent detections of DNA shed from these carps in canal water upstream from the barriers.
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8

Estrada, Jheanel, Gil Opina Jr, and Anshuman Tripathi. "Object and Traffic Light Recognition Model Development Using Multi-GPU Architecture for Autonomous Bus." In Frontiers in Artificial Intelligence and Applications. IOS Press, 2021. http://dx.doi.org/10.3233/faia210286.

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The autonomous vehicle is both an exciting yet complex field to dig in these past few years. Many have ventured out to develop Level 4 Autonomous Vehicle but up to this point, many issues were still arising about its safety, perception and sensing capabilities, tracking, and localization. This paper aims to address the struggles of developing an acceptable model for object detection in real-time. Object detection is one of the challenging areas of autonomous vehicles due to the limitations of the camera, lidar, radar, and other sensors, especially during night-time. There were various datasets and models available, but the number of samples, the labels, the occlusions, and other factors may affect the performance of the dataset. To address the mentioned problem, this study has undergone a rigorous process of scene selection and imitation to deal with the imbalance dataset, applied the state-of-the-art YOLO architecture for the model development. After the development process, the model was deployed in a multi-GPU architecture that lessens the computational load on a single GPU structure and was tested on a 12-meter fully electric autonomous bus. This study will lead to the development of a usable and safe autonomous bus that will lead the future of public transportation.
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Hector, Scott, Karen Blake, and Tim Elam. "Petroleum occurrences in the Mount Diablo area, California." In Regional Geology of Mount Diablo, California: Its Tectonic Evolution on the North America Plate Boundary. Geological Society of America, 2021. http://dx.doi.org/10.1130/2021.1217(06).

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ABSTRACT Mount Diablo is flanked on its northeast side by a thick section of Late Cretaceous and Tertiary sedimentary rocks, which produced small hydrocarbon accumulations in the Los Medanos, Willow Pass, Mulligan Hill, and Concord gas fields. The first well was drilled in 1864, and today most of the active wells on the northeast flank are used for gas storage by Pacific Gas and Electric Company. These fields, which also include the Brentwood oil field, lie to the northeast of Mount Diablo and have produced 6.4 million cubic meters (225 billion cubic feet) of natural gas and over 57 million cubic meters (9.1 million barrels) of oil. The main reservoirs for the Sacramento Basin are sandstones in the Late Cretaceous and Paleogene section. The source rock there is primarily from the Upper Cretaceous Dobbins Shale, which began generation 75 m.y. ago, and the Winters Shale, which began generation 35 m.y. ago. The Livermore Basin is located on the western and southwestern sides of the mountain. The only commercial field in that basin is the small Livermore oil field. This field produces primarily from Miocene sandstones. The Livermore Basin is a Neogene basin that was syntectonically formed in the last few million years and continues to grow today. Studies of the black oils found in the Livermore field show that the source rock is likely the Eocene Nortonville Shale, though the Upper Cretaceous Moreno shale is also considered to be a possible source. The Livermore field has produced 12 million cubic meters of oil (1.9 million barrels).
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Ruland, Christoph. "Secure Online Metering for a Liberalized Energy Market." In Secure E-Government Web Services, 97–110. IGI Global, 2007. http://dx.doi.org/10.4018/978-1-59904-138-4.ch006.

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The liberalization of the energy market requires frequent online access to metering devices. That is not only necessary for exchanging meter data, but also for management reasons. The integration of strong security mechanisms is an essential requirement for the introduction of online meter device access. The project SELMA (Secure Electronic Exchange of Metering Data) supported the development of a concept, the implementation and a field trial test of prototypes of such metering devices. This paper focuses on the security aspects. It describes the security analysis, the required security services and the security concept. The security concept includes the security mechanisms and cryptographic techniques applied to the metering data as well as the security management.
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Conference papers on the topic "Electric field meter"

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Guo, Zaihua, Yuxue Huang, and Liangfu Li. "Research and design preamplifier circuit of atmospheric electric field meter." In 2011 7th Asia-Pacific International Conference on Lightning (APL). IEEE, 2011. http://dx.doi.org/10.1109/apl.2011.6110177.

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Li, Fawu, Hao Lu, and Chuanxiao Zheng. "Research on Lightning Early Warning Method Based on Field Mill Electric Field Meter." In 2023 6th International Conference on Energy, Electrical and Power Engineering (CEEPE). IEEE, 2023. http://dx.doi.org/10.1109/ceepe58418.2023.10166802.

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Randa, J., and M. Kanda. "High-Frequency Errors of an Electric-Field Meter in Complicated Environments." In 1985 IEEE International Symposium on Electromagnetic Compatibility. IEEE, 1985. http://dx.doi.org/10.1109/isemc.1985.7567008.

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Dimitrov Andreev, Andrey. "Analysis of a non-contact flow meter with exciting electric field." In 2014 18th International Symposium on Electrical Apparatus and Technologies (SIELA). IEEE, 2014. http://dx.doi.org/10.1109/siela.2014.6871843.

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Zaitsev, B., A. Shikhabudinov, A. Teplykh, I. Borodina, and V. Kisin. "The meter of microdisplacements based on piezoelectric lateral electric field excited resonator." In 2016 IEEE International Ultrasonics Symposium (IUS). IEEE, 2016. http://dx.doi.org/10.1109/ultsym.2016.7728681.

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Johnston, Alan R., and Harold Kirkham. "An Electric Field Meter And Temperature Measurement Techniques For The Power Industry." In Cambridge Symposium-Fiber/LASE '86, edited by Ramon P. DePaula and Eric Udd. SPIE, 1987. http://dx.doi.org/10.1117/12.937507.

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Shcherbyna, Olga, Maksym Zaliskyi, Oleksandr Solomentsev, Nataliia Kuzmenko, Felix Yanovsky, Ivan Ostroumov, Yuliya Averyanova, and Olha Sushchenko. "Diagnostic Process Efficiency Analysis for Block Diagram of Electric Field Parameters Meter." In 2021 IEEE 12th International Conference on Electronics and Information Technologies (ELIT). IEEE, 2021. http://dx.doi.org/10.1109/elit53502.2021.9501136.

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Liu, Zehui, Wei He, Hanzhi Zhang, Shuang Xia, Bo Xiao, and Yan Xu. "Notice of Retraction: Study on the Parameters of UHV DC Electric Field Meter." In 2010 Asia-Pacific Power and Energy Engineering Conference (APPEEC 2010). IEEE, 2010. http://dx.doi.org/10.1109/appeec.2010.5449449.

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Wu, Yu-Hsuan, Stefania Romeo, Martin A. Gundersen, and P. Thomas Vernier. "Biophotonic Studies of Intracellular Responses to Nanosecond, Megavolt-per-meter, pulsed Electric Field." In Bio-Optics: Design and Application. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/boda.2011.jtua3.

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Nowosielski, Leszek, and Jacek Rychlica. "Method of Transmitter and Electric Field Strength Meter Synchronization during Shielding Effectiveness Measurement." In 2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring). IEEE, 2019. http://dx.doi.org/10.1109/piers-spring46901.2019.9017228.

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Reports on the topic "Electric field meter"

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Panek, Jeffrey, James McCarthy, Alan Krol, and Adrian Huth. PR-312-15201-Z01 Balko OK Compressor Station 102 Data Summary and Initial AERMOD Performance Assessment. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), November 2017. http://dx.doi.org/10.55274/r0011444.

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In 2010, the U.S. Environmental Protection Agency (EPA) adopted a 1-hour nitrogen dioxide (NO2) National Ambient Air Quality Standard (NAAQS) of 100 parts per billion (ppb) or approximately 188 micrograms per cubic meter (�g/m3) that is considerably more stringent than the longstanding annual standard of 53 ppb (100 �g/m3). New or modified compressor units may be encumbered by federal or state regulatory requirements to demonstrate compliance with the NO2 NAAQS using AERMOD, EPA's dispersion model, because the new NAAQS greatly reduces the compliance margin. AERMOD was developed and validated with a primary focus on larger sources with taller stacks, such as electric utility boilers, which results in model conservatism for sources such as compressor stations with shorter stacks that result in near-field modeled impacts. However, a comprehensive dataset was not available to understand AERMOD conservatism. This project developed a comprehensive dataset based on 13 months of monitoring at a compressor station in Oklahoma, including ambient monitoring of ozone and oxides of nitrogen (NOx), meteorological data, and reciprocating engine emissions. This final report summarizes planning and execution of the data collection effort, reviews the resulting dataset, and provides an initial assessment of AERMOD performance based on this dataset. In addition to this report, the dataset will be released to EPA and the public so that it is accessible to the modeling community for other projects that are investigating specific aspects of AERMOD performance. This includes both the report and the associated data in Excel format.
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Panek, Jeffrey, Adrian Huth, Alan Krol, and James McCarthy. PR-312-18208-R03 AERMOD Performance Assessments, Implementation Issues and Recommended Improvements. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), August 2022. http://dx.doi.org/10.55274/r0012232.

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In 2010, the U.S. Environmental Protection Agency (EPA) adopted a 1-hour nitrogen dioxide (NO2) National Ambient Air Quality Standard (NAAQS) of 100 parts per billion (ppb) or approximately 188 micrograms per cubic meter (�g/m3) that is considerably more stringent than the longstanding annual standard of 53 ppb (100 �g/m3). New or modified compressor units may be encumbered by federal or state regulatory requirements to demonstrate compliance with the NO2 NAAQS using AERMOD, EPA's dispersion model, because the new NAAQS greatly reduces the compliance margin. Compressor stations have been increasingly requested to model source contribution to other nearby permitting actions through no new action on their part. Model conservatism and performance concerns has limited NO2 NAAQS compliance options necessitating the need to improve model estimates for reciprocating engine drivers at pipeline compressor stations. AERMOD was developed and validated with a primary focus on larger sources with taller stacks, such as electric utility boilers, which results in model conservatism for sources such as compressor stations with shorter stacks that result in near-field modeled impacts. This report summarizes additional analyses conducted and reviewed with EPA that were completed to assess and reduce model conservatism and improve overall model performance. This report presents a more detailed analysis of modeled versus observed results, model performance, and recommendations for model improvements. These analyses also evaluated other ongoing efforts (e.g., PRIME2 downwash improvements and integration of the ADMS chemistry module an alternative in AERMOD) using the data collected from this program may be used to assess these revisions. This final report summarizes the deeper dive into the NOx chemistry, dispersion, and downwash performance assessments within AERMOD based on the Balko dataset. Specific recommendations are made throughout this report to improve overall model performance.
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Robinett, Fred. PR-471-14207-Z03 Evaluation of Field Pump Performance Testing Procedure. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), August 2019. http://dx.doi.org/10.55274/r0011616.

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In situ pump performance testing was performed at the TransCanada pipeline Monitor station in Alberta Canada and Liebenthal station in Saskatchewan Canada in accordance with the Field Pump Performance Testing Procedure (PRCI report PR-471-14207-R01). Testing at the Monitor station was performed by Sulzer with two different batches of crude oil with slightly different viscosities and densities. Because of the pipeline operation limitations the flow could not be varied appreciably, however the flow points were near the pumps bep flow and therefore believed to be beneficial. To help validate field pump performance testing techniques measurements were taken using two methods to measure flow and two to measure pump power-in. Testing at the Liebenthal station was performed by TransCanada personnel on one fixed speed and one variable speed unit. All testing was performed with one batch of crude oil. The fixed speed unit power was measured with electrical power to the motor and the variable speed unit power was measured with a torque meter and electrical power. A full description of the Excel sheets used to calculate the field pump performance and the factory test data corrected to field conditions is made. The spreadsheet is included with this report. This work will benefit the liquids pipeline operators by validating the field test procedure, thereby providing assurance and acceptance of the methods. Using these field pump performance testing methods on additional pumps will help populate the database of measured viscous pump performances. This data can then be used to further improve the Hydraulic Institutes viscous correction calculations. Additionally, improved field pump performance measurements will allow the pipeline users to optimize their pipeline operation.
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