Relevant bibliographies by topics / PULSE CHARACTERISTICS

Academic literature on the topic 'PULSE CHARACTERISTICS'

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Published: 11 September 2023

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Journal articles on the topic "PULSE CHARACTERISTICS"

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Zhang, Yangkai, and Qian Li. "Influence of Hydraulic Parameters on Multi-Stage Pulse Characteristics of Pressurized Pulsed Water Jet." Processes 11, no. 8 (August 20, 2023): 2502. http://dx.doi.org/10.3390/pr11082502.

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The multi-stage pulse competition of pressurized pulsed water jet becomes the initial pulse at the head tip, and hydraulic parameters are the key parameters that affect the characteristics of multiple pulses. Based on the ultra-high-speed imaging system, a pressurized pulsed water jet flow field capture system was constructed, and the effects of initial pressure and driving pressure of the pressurized chamber on the characteristics of multi-stage pulses were studied. The experimental results show that as the initial pressure of the booster chamber increases, the jet changes from a discontinuous state to a continuous state, and the multi-level pulse simultaneously changes from dominant multi-pulse to implicit multi-pulse; as the driving pressure increases, the initial spacing between the first pulse and the second pulse increases, and the peak velocity of the initial pulse gradually increases. At the same time, the location of the peak velocity also shifts away from the nozzle as the driving pressure increases. In addition, the peak velocity of the initial pulse is relatively close to the theoretical velocity of the continuous jet under driving pressure conditions.
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Su, Zhi, Haohua Zong, Hua Liang, Jun Li, and Xiancong Chen. "Characteristics of a dielectric barrier discharge plasma actuator driven by pulsed-DC high voltage." Journal of Physics D: Applied Physics 55, no. 7 (November 12, 2021): 075203. http://dx.doi.org/10.1088/1361-6463/ac30bc.

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Abstract Dielectric barrier discharge using pulsed-DC high voltage (pulsed-DC DBD) have been proven to be capable of effectively reducing skin friction drag in turbulent boundary layers with limited power consumption, thus producing significant net power savings. In this work, the characteristics of pulsed-DC DBD, including power consumption, induced flow structure, thermal effect, and body force, are investigated sequentially. Both the power consumption and pressure waves produced by pulsed-DC DBD are similar to that of DBD using nanosecond pulses (ns-DBD), whereas the wall-bounded jet structure resembles that of DBD using sinusoidal high voltage (ac-DBD). A curved wall jet is induced at a small pulse width, which turns into a straight one due to the combined effect of momentum and thermal addition when the pulse width increases. With increasing pulse width, the induced body force goes up while the thermal effect weakens. Although pulse frequency has no impact on the wall-bounded jet topology, the body force increases with pulse frequency because of the enhanced energy entrainment. With these results, four parameters that affect the performance of pulsed-DC DBD are extracted, including the pulse leading edge, pulse width, frequency, and amplitude, which lays the foundation for the optimization of pulsed-DC DBD.
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Seol, Youbin, Minsu Choi, Hongyoung Chang, and Shinjae You. "Study on OH Radical Production Depending on the Pulse Characteristics in an Atmospheric-Pressure Nanosecond-Pulsed Plasma Jet." Materials 16, no. 10 (May 19, 2023): 3846. http://dx.doi.org/10.3390/ma16103846.

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Hydroxyl radicals (OH) play a crucial role in plasma-bio applications. As pulsed plasma operation is preferred, and even expanded to the nanosecond range, it is essential to study the relationship between OH radical production and pulse characteristics. In this study, we use optical emission spectroscopy to investigate OH radical production with nanosecond pulse characteristics. The experimental results reveal that longer pulses generate more OH radicals. To confirm the effect of pulse properties on OH radical generation, we conduct computational chemical simulations, focusing on two types of pulse properties: pulse instant power and pulse width. The simulation results show that, similar to the experimental results, longer pulses generate more OH radicals. In the nanosecond range, reaction time is critical for OH radical generation. In terms of chemical aspects, N2 metastable species mainly contribute to OH radical generation. It is a unique behavior observed in nanosecond range pulsed operation. Furthermore, humidity can turn over the tendency of OH radical production in nanosecond pulses. In a humid condition, shorter pulses are advantageous for generating OH radicals. Electrons play key roles in this condition and high instant power contributes to them.
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King, Emma, Deirdre Cobbin, and Damien Ryan. "The Reliable Measurement of Radial Pulse: Gender Differences in Pulse Profiles." Acupuncture in Medicine 20, no. 4 (December 2002): 160–67. http://dx.doi.org/10.1136/aim.20.4.160.

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This study was undertaken to determine whether healthy adults exhibited characteristic pulse profiles. Pulse characteristics measured for 83 women and 65 men included presence at the Traditional Chinese Medicine (TCM) locations ( Cun, Guan, Chi); and depth (superficial, middle, deep), overall pulse force, relative pulse force, pulse width and pulse rhythm. Most subjects had similar values for many of the characteristics investigated including relative pulse force at the three traditional palpation locations ( Cun, Guan and Chi), pulse width and pulse rhythm. There were some significant gender differences. The pulse was present beyond Chi in 90% of males compared with 56% of females. Female pulses tended to be less forceful compared with males. However, with the exception of overall force, there was little support for TCM assumptions of gender differences in pulse such as in left/right balance. There was some support for the use of the TCM palpation locations Cun, Guan and Chi to discriminate between pulses since there was significant differences in manifestations of some pulse characteristics among these locations.
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YATSUI, KIYOSHI, KOUICHI SHIMIYA, KATSUMI MASUGATA, MASAO SHIGETA, and KAZUHIKO SHIBATA. "Characteristics of pulsed power generator by versatile inductive voltage adder." Laser and Particle Beams 23, no. 4 (October 2005): 573–81. http://dx.doi.org/10.1017/s0263034605050779.

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A pulsed power generator by inductive voltage adder, versatile inductive voltage adder (VIVA-I), which features a high average potential gradient (2.5 MV/m), was designed and is currently in operation,. It was designed to produce an output pulse of 4 MV/60 ns by adding 2 MV pulses in two-stages of induction cells, where amorphous cores are installed. As a pulse forming line, we used a Blumlein line with the switching reversed, where cores are automatically biased due to the presence of prepulse. Good reproducibility was obtained even in the absence of the reset pulse. Within ∼40% of full charge voltage, pulsed power characteristics of Marx generator, pulse forming line (PFL), transmission line (TL), and induction cells were tested for three types of loads; open-circuit, dummy load of liquid (CuSO4) resistor, and electron beam diode. In the open-circuit test, ∼2.0 MV of output voltage was obtained with good reproducibility. Dependences of output voltage on diode impedances were evaluated by using various dummy loads, and the results were found as expected. An electron-beam diode was operated successfully, and ∼18 kA of beam current was obtained at the diode voltage of ∼1 MV.
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Shaburova, Nataliya, Valeriy Krymsky, and Ahmad Ostovari Moghaddam. "Theory and Practice of Using Pulsed Electromagnetic Processing of Metal Melts." Materials 15, no. 3 (February 7, 2022): 1235. http://dx.doi.org/10.3390/ma15031235.

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In industrial practice, various methods of external influences on metal melts are used. For example, vibration processing, exposure to ultrasound, and other physical fields. The main purpose of such influences is purposeful grinding of the metal structure, which contributes to the improvement of mechanical characteristics. The article presents an overview of research on pulse processing of ferrous and non-ferrous melts: processing with pulsed current, electromagnetic pulses and pulsed magnetic fields. The results of the analysis showed that, despite the different methods and devices used for these treatments, their effect on the structure and properties of the cast metal is generally the same. The main effect is observed in the refinement of the macro and microstructure and a simultaneous increase in the strength properties and plasticity. The intensity of the observed effects depends on the characteristics of the equipment used to create the pulses. The main characteristics are: pulse duration, pulse frequency, current amplitude, and power.
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Wang, Fuyong, Zhipeng Qin, Jing Luo, Xiudong Zhou, and Bo Li. "Duration-controllable mid-infrared pulse from bias-pumped Er:ZBLAN fiber laser." Laser Physics 32, no. 1 (December 6, 2021): 015102. http://dx.doi.org/10.1088/1555-6611/ac3d0f.

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Abstract We experimentally demonstrate the generation of duration-controllable pulses at 2.8 µm based on bias-pump technique for the first time. Bias-pumped by a 976 nm continuous-wave (CW)-pulsed combined laser, duration-controllable pulses are produced from an Er:ZBLAN fiber laser and the duration is entirely determined by the duration of pump pulse. Numerical simulations agree with experimental results well, and further predict that the temporal profile of output pulse from bias-pumped Er:ZBLAN fiber laser can also be identical with that of pump pulse under certain conditions. The pump-controlled mid-infrared pulse may have more applications in various areas due to its manageable temporal characteristics.
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Kandratsyeu, Aleh, Uladzimir Sabaleuski, Luis Redondo, and Andrei G. Pakhomov. "Four Channel 6.5 kV, 65 A, 100 ns–100 µs Generator with Advanced Control of Pulse and Burst Protocols for Biomedical and Biotechnological Applications." Applied Sciences 11, no. 24 (December 11, 2021): 11782. http://dx.doi.org/10.3390/app112411782.

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Pulsed electric fields in the sub-microsecond range are being increasingly used in biomedical and biotechnology applications, where the demand for high-voltage and high-frequency pulse generators with enhanced performance and pulse flexibility is pushing the limits of pulse power solid state technology. In the scope of this article, a new pulsed generator, which includes four independent MOSFET based Marx modulators, operating individually or combined, controlled from a computer user interface, is described. The generator is capable of applying different pulse shapes, from unipolar to bipolar pulses into biological loads, in symmetric and asymmetric modes, with voltages up to 6.5 kV and currents up to 65 A, in pulse widths from 100 ns to 100 µs, including short-circuit protection, current and voltage monitoring. This new scientific tool can open new research possibility due to the flexibility it provides in pulse generation, particularly in adjusting pulse width, polarity, and amplitude from pulse-to-pulse. It also permits operating in burst mode up to 5 MHz in four independent channels, for example in the application of synchronized asymmetric bipolar pulses, which is shown together with other characteristics of the generator.
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Wang, Wen Bin, Dao Yuan Liu, and Yu Qin Yao. "Study of Transmission Characteristics of Optical Pulse in the Dispersive Fiber." Applied Mechanics and Materials 513-517 (February 2014): 2775–77. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.2775.

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Chromatic dispersion and nonlinearity effect are the two important factors affecting the optical pulse which propagates in the optical fiber. The former makes the pulse broaden, the latter mainly broaden pulse spectrum. Therefore, the linear and nonlinear dispersive propagation and control of optical pulses in the fiber has always been an important research topic of concern. In this paper, Starting from the nonlinear Schrodinger equation of the optical pulse and neglecting the chromatic dispersion, under the situation of chirp and chirp-free Gaussian pulse, we analytical analyzed, calculated and simulated the frequency chirp, pulse broadening factor and waveform of the Gaussian optical pulses in dispersion fiber. And numerical studied the waveform evolution of chirp-free super-Gaussian optical pulse with distance, analyzed the influence of optical pulse propagation by dispersion in different shapes and different initial chirp.
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Fujii, T., R. Gobbo, and M. Rea. "Pulse corona characteristics." IEEE Transactions on Industry Applications 29, no. 1 (1993): 98–102. http://dx.doi.org/10.1109/28.195894.

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Dissertations / Theses on the topic "PULSE CHARACTERISTICS"

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Turner, Kevin E. "Stiffness Characteristics of Airfoils Under Pulse Loading." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1259113516.

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Liewkongsataporn, Wichit. "Characteristics of Pulsating Flows in a Pulse Combustor." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/11542.

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Pulsating flows in a Helmholtz pulse combustor tailpipe were numerically simulated by a commercial CFD software package, FLUENT. The effects of ambient temperature on the characteristics of the pulsating tailpipe flows were studied. Two study cases, with high and low levels of ambient temperature, were simulated with compressible flow equations. An additional case, with high ambient temperature, was simulated with incompressible (temperature-dependent density) flow equations. Results showed that the effect of ambient temperature on the mean temperature profile in the tailpipe was limited to the distance where the ambient fluid traveled into the tailpipe during the period of flow reversal. In this region, the amplitude of mass flow rate oscillation significantly increased, due to higher density associated with low ambient temperature. The overall effects of cooler ambient temperature included an increase in mean pressure at the entrance of the tailpipe and a decrease in the magnitude of velocity amplitude profile along the tailpipe. Interestingly, the mean velocities along the tailpipe, even at the tailpipe exit, were not affected by the cooler ambient air. The mean velocity at the exit corresponded to the higher temperature of fresh fluid from upstream, which was not affected by the ambient temperature, driven out of the tailpipe in each oscillation cycle. The linear acoustic theory with appropriate assumptions could be used to calculate the magnitude of the profiles of velocity amplitude along the tailpipe as a fair approximation, at least for the study cases in this thesis.
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Chang, Wing Chien Christopher. "Operational characteristics of an SCR-based pulse generating circuit." Thesis, Monterey, California: Naval Postgraduate School, 2014. http://hdl.handle.net/10945/44535.

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Approved for public release; distribution is unlimited
A commercial off-the-shelf silicon controlled rectifier (SCR) was connected in series with a parallel RC load under DC bias to produce self-terminating voltage pulses. The physics underlying the switching mechanism of the SCR in such a circuit was investigated and the values of load resistance and capacitance varied to ascertain their role on the pulse-generating capability of the circuit. When pulsing was successfully achieved, a reverse recovery current was always present to return the SCR from its on state to its off state. In addition, the regenerative process responsible for turning the SCR is through the avalanche multiplication of charge carriers within the device. This appeared to be independent of the mode of triggering, either by increasing the DC bias or using a current at the gate. Significantly, pulsing was discovered to be sustainable for a specific range of RC values that depends on the SCR’s intrinsic turn-off time. Specifically, it was found that without making modifications to the SCR itself, the minimum dead time achievable between pulses was essentially the turn-off time of the SCR. The findings of the research will help to design optimum SCR-based circuits for pulse mode detection of light and ionizing radiation without external amplification circuitry.
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Melia, Thomas. "Heat transfer characteristics of pulse combustors for gas turbine engines." Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/10278.

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Conventional gas turbine combustors operate with a designed drop in pressure over the length of the device. This is desired in order to encourage mixing within the combustor. Compared to this, pulse pressure gain combustors are an alternative to the conventional combustor that produces an increase in static pressure between the inlet and exhaust of the device. The removal of the combustor pressure loss increases the efficiency of the combustion process by increasing the amount of work produced. Many types of pulsed pressure gain combustors exist. Of these, the valveless pulse combustor is the simplest featuring no moving parts. Whilst some research has been conducted into investigating the performance and workings of a pulse combustor, little has been conducted with the view of cooling the combustor. This has been the focus for the research contained herein. The research has focussed on establishing an understanding of the heat transfer characteristics within a pulse combustor tailpipe. This has involved experimental, analytical and computational research on a pulse combustor as well as on a cold-flow model of a pulse combustor tailpipe. This has enabled a study into the feasibility of cooling a pulse combustor to be conducted. The research has found that for conditions where the unsteady velocity amplitude within the cold-flow model of the pulse combustor tailpipe exceeds the mean velocity, an enhancement to the heat transfer coefficient is measured compared to the value expected in a similar non-oscillating flow. When there is no enhancement to the heat transfer coefficient, the cyclic variation of the unsteady heat flux follows the variation of the unsteady pressure within the device. However, at times of enhancement, the instantaneous heat flux structure shows a large deviation from the structure of the pressure field driving the oscillations. This change is shown to be caused by the reversal in the near-wall velocity and may indicate a mechanism for the enhancement in the mean heat flux. The cooling feasibility study showed that with further investigation, it may be possible to cool a pulse combustor within a gas turbine engine.
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Mutsuura, Keita, Hirotaka Shimizu, Yasunobu Yokomizu, and Toshiro Matsumura. "Flux flow resistance in Bi2223 generated by pulse currents." IEEE, 2005. http://hdl.handle.net/2237/6789.

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Belshe, Elizabeth F. "Evaluating pulse-amplitude modulated fluorometry for landscape scale assessment of photosynthetic characteristics /." Electronic version (PDF), 2005. http://dl.uncw.edu/etd/2005/belshee/elizabethbelshe.pdf.

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Wolters, G. "Characteristics of wave impact induced pressure pulse propagation into cracks of coastal structures." Thesis, Queen's University Belfast, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419521.

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DeSantis, Dylan David. "CH3NH3PbBr3-xClx Device Characteristics for Gamma Spectroscopy with Simulations of Real Time Pulse Height Analysis." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1501878848404021.

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Clark, Jeffrey. "Double Negative Metamaterials in Dielectric Waveguide Configurations." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/28708.

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With the recent resurgence of interest in double negative (DNG) materials and the reported construction of a metamaterial with DNG characteristics, applications of these materials become feasible and examination of the behavior of systems and devices a potentially fruitful topic. The most promising area of research, upon inquiry into past work related to DNG materials, proves to be dielectric waveguides. The present investigation, then, focuses on the inclusion of DNG materials in various planar dielectric waveguide configurations. These waveguides involve a core region surrounded by various numbers of symmetrically-placed cladding layers. The present investigation involves the review of the electromagnetic properties of DNG materials by a thorough analysis based on Maxwell's equations. The use of a negative index of refraction for these materials is justified. These results are then used to perform a frequency domain analysis of an N-layer formulation for dielectric waveguides which is general for any combination of DNG and double positive (DPS) materials. This N-layer formulation allows for the derivation of the characteristic equation, which relates the operating frequency and the propagation constant solutions, along with the cutoff conditions and field distributions. A causal material model which obeys the Kramers-Kronig relations and which is based on measurements of a realized metamaterial is studied and used in the investigation in order to produce realistic results. The N-layer formulation is then applied to the three-layer (slab) waveguide and known results are reviewed. A new interpretation of intramodal degeneracy is given, whereby degenerate modes are split into two separate modes, one with positive phase velocity and one with negative phase velocity but both with a causal positive group (energy) velocity. Next, the formulation is applied to the five-layer waveguide. New behaviors are observed in this case which are not seen for the three-layer waveguide, including the return of the fundamental mode in some cases, whereas it is never present for the three-layer guide, the absence of certain higher-order modes in some situations and the appearance of new modes. Additionally, for some configurations the order of the even and odd modes in the DNG frequency range is found to be reversed from that of conventional waveguides. The photonic crystal waveguide, which involves an infinite number of periodically placed cladding layers, is next studied using ray analysis, and a slight variation of the N-layer formulation is used to compare these results with those of the pseudo-photonic crystal waveguide. The pseudo-photonic crystal waveguide is identical to the photonic crystal waveguide with the exception that it has only large but finite number of layers. It is seen that the results of these two cases are similar for conventional modes, but the photonic crystal waveguide allows for new modes called photonic crystal modes which are inaccessible through conventional waveguides. Interesting phenomena such as mode crossings among the photonic crystal modes are observed and discussed. Using the results from the frequency domain analysis of the five-layer waveguide, a Fourier transform technique is used to study pulse propagation in a waveguide containing DNG materials. A Gaussian pulse is launched in the waveguide over the frequency range covering a portion of the positive- and negative-phase-velocity fundamental transverse electric (TE) modes. Splitting of the input pulse into two separate pulses is observed, where both of these new pulses have a causal, positive energy velocity. The interpretation of intramodal degeneracy given in previous discussions is buttressed with evidence from this portion of the investigation, thus completing the analysis and bringing the present study to its conclusion.
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Kalinichenko, A. I., V. E. Strel'nitskij, and V. V. Vasyliev. "Characteristics of DLC Coating Prepared by Pulse Biasing: Analysis in Model of Thermoelastic Peak of Ion." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35398.

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A mode of pulse biasing of DLC coating deposition is theoretically investigated. In this mode a deposited ion flow of plasma with energy of E0 (20 200) eV is modified by superimposing of pulse potential ~ 1000 V. It was shown that intrinsic stress in a DLC coating can be decreased in several times without of essential decrease of sp3-bonded carbon concentration compared with DLC made in stationary mode deposition at E0 ion energy. A method of optimization of pulse mode parameters is proposed which is based on analysis of location of thermoelastic peaks of ions on phase P, T-diagram of carbon. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35398
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Books on the topic "PULSE CHARACTERISTICS"

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Engineers, Institute Of Electrical and Electronics. IEEE standard methods and equipment for measuring the transmission characteristics of pulse-code modulation (PCM) telecommunications circuits and systems. New York, NY, USA: Institute of Electrical and Electronics Engineers, 1991.

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Matick, Richard E. Transmission lines for digital and communication networks: An introduction to transmission lines, high-frequency and high-speed pulse characteristics and applications. New York: IEEE Press, 1995.

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Marchenko, Aleksey, and Mihail Nemcov. Electronics. ru: INFRA-M Academic Publishing LLC., 2023. http://dx.doi.org/10.12737/1587595.

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The material of module 2 "Electronics" is systematically presented in accordance with the modern university program of the discipline " Electrical Engineering and Electronics" for non-electrotechnical areas of training of bachelors and certified specialists. The element base of semiconductor electronics devices is considered: classification, voltage and frequency characteristics, features of the use of electronic devices in various operating modes are given. The principles of construction and functioning of typical analog, pulse and digital devices are described in detail. A separate chapter is devoted to the principles of converting light energy into electrical energy and vice versa, the design and operation of optoelectronic devices and fiber- optic lines of information transmission. Meets the requirements of the federal state educational standards of higher education of the latest generation. For students of higher educational institutions studying in non-electro- technical areas of bachelor's and graduate training.
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Al-Jimaz, Adel Shaye. The hydrodynamic behaviour and mass transfer characteristics of single droplets in a pulsed sieve plate column. Birmingham: Aston University. Department of Chemical Engineering and Applied Chemistry, 1992.

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Roark, D. Michael. Estimation of hydraulic characteristics in the Santa Fe Group aquifer system using computer simulations of river and drain pulses in the Rio Bravo study area, near Albuquerque, New Mexico. Albuquerque, N.M: U.S. Dept. of the Interior, U.S. Geological Survey, 2001.

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Roark, D. Michael. Estimation of hydraulic characteristics in the Santa Fe Group aquifer system using computer simulations of river and drain pulses in the Rio Bravo study area, near Albuquerque, New Mexico. Albuquerque, N.M: U.S. Dept. of the Interior, U.S. Geological Survey, 2001.

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Ghosh, Prakriti Kumar. Pulse Current Gas Metal Arc Welding: Characteristics, Control and Applications. Springer, 2017.

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Ghosh, Prakriti Kumar. Pulse Current Gas Metal Arc Welding: Characteristics, Control and Applications. Springer, 2018.

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Matick, Richard E. Transmission Lines and Communication Networks: An Introduction to Transmission Lines, High-frequency and High-speed Pulse Characteristics and Applications. Wiley-IEEE Press, 2000.

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Institute Of Electrical and Electronics Engineers and IEEE Communications Society. IEEE Standard Methods and Equipment for Measuring the Transmission Characteristics of Pulse-Code Modulation (Pcm Telecommunications Circuits and Sys). Institute of Electrical & Electronics Enginee, 1991.

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Book chapters on the topic "PULSE CHARACTERISTICS"

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Li, John K. J. "Arterial Pulse Transmission Characteristics." In The Arterial Circulation, 69–128. Totowa, NJ: Humana Press, 2000. http://dx.doi.org/10.1007/978-1-59259-034-6_4.

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Lakshmaiah, Dayaydi, C. B. Ramarao, and K. Kishan Rao. "Switching Characteristics of Devices." In Analog and Pulse Circuits, 72–85. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003274582-3.

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Li, Nan, Yuping Zhao, Xiaobo Mao, Yang Wang, Yifan Shang, and Luqi Huang. "Physical Constitution Discrimination Based on Pulse Characteristics." In Communications in Computer and Information Science, 359–70. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3415-7_30.

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Battermann, Sven, and Heyno Garbe. "Time Domain Measurements to Validate Test Site Characteristics." In Ultra-Wideband, Short-Pulse Electromagnetics 7, 561–67. New York, NY: Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-37731-5_61.

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Marengo, Edwin A., F. Anthony, J. Devaney, and Ehud Heyman. "Radiation Characteristics of Collimated, Ultra-Wideband, Volume Sources." In Ultra-Wideband, Short-Pulse Electromagnetics 2, 321–30. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-1394-4_34.

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Kaskens, Julian, and Annamalai Manickavasagan. "Pulse-Based Yogurt: Physicochemical, Microbial and Sensory Characteristics." In Plant Protein Foods, 223–49. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-91206-2_8.

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Xia, Jilu, Zicheng Zhang, Shifei Liu, and Zhikuan Zhu. "Study on Vacuum Breakdown Characteristics of Microseconds Pulse." In Lecture Notes in Electrical Engineering, 1251–58. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-0357-3_128.

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Mohanty, Atanu, and Nirod K. Das. "Low Cross-Polar, Short-Pulse Radiation Characteristics of Printed Antennas Covered by a Polarization Grating." In Ultra-Wideband, Short-Pulse Electromagnetics, 195–202. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-2870-8_23.

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Ma, Tzyh-Ghuang, and Sung-Jung Wu. "Ultrawideband Band-Notched U-Shape Folded Monopole Antenna and its Radiation Characteristics." In Ultra-Wideband Short-Pulse Electromagnetics 8, 49–56. New York, NY: Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-73046-2_7.

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Haruyama, T., and H. Inoue. "Cooling Characteristics of a Modified Miniature Pulse Tube Refrigerator." In A Cryogenic Engineering Conference Publication, 1427–33. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-0373-2_179.

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Conference papers on the topic "PULSE CHARACTERISTICS"

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Berenshtein VB, A. A. Rabinov, O. V. Vereschaka, N. V. Cherepanov, E. V. Emelyanov, and A. Y. Tsytsarev. "Pulse signals noise characteristics." In 2005 15th International Crimean Conference Microwave and Telecommunication Technology. IEEE, 2005. http://dx.doi.org/10.1109/crmico.2005.1565146.

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Huang, Shijie, Yi Liu, Liangli Xiong, He Zhang, and Fuchang Lin. "Destruction Characteristics of Electric Pulse Discharge." In 2020 IEEE 1st China International Youth Conference on Electrical Engineering (CIYCEE). IEEE, 2020. http://dx.doi.org/10.1109/ciycee49808.2020.9332637.

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Voskresensky, D. I., and E. V. Ovchinnikova. "Direction characteristics of short-pulse antennas." In 2000 10th International Crimean Microwave Conference. Microwave and Telecommunication Technology. Conference Proceedings. IEEE, 2000. http://dx.doi.org/10.1109/crmico.2000.1255833.

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Kamezaki, Hiroaki, Kaede Yano, Haruhito Kato, and Hideyuki Horisawa. "Effect of Discharge Pulse Delays on Characteristics of a Short-pulse Laser-assisted Pulsed Plasma Thruster." In 2018 Joint Propulsion Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2018. http://dx.doi.org/10.2514/6.2018-4590.

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Okajima, K., H. Ohashi, and H. Ito. "Characteristics of intense pulsed heavy ion beam by bipolar pulse accelerator." In 2014 IEEE 41st International Conference on Plasma Sciences (ICOPS) held with 2014 IEEE International Conference on High-Power Particle Beams (BEAMS). IEEE, 2014. http://dx.doi.org/10.1109/plasma.2014.7012450.

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Okajima, K., H. Ohashi, and H. Ito. "Characteristics of intense pulsed heavy ion beam by bipolar pulse accelerator." In 2014 IEEE 41st International Conference on Plasma Sciences (ICOPS) held with 2014 IEEE International Conference on High-Power Particle Beams (BEAMS). IEEE, 2014. http://dx.doi.org/10.1109/plasma.2014.7012754.

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Zhang, Dongdong, Ping Yan, Jue Wang, and Yuan Zhou. "Magnetic characteristics of saturable pulse transformer in magnetic pulse compression system." In 2009 IEEE Pulsed Power Conference (PPC). IEEE, 2009. http://dx.doi.org/10.1109/ppc.2009.5386352.

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Tanima, Indu Saini, and B. S. Saini. "Physiological Characteristics Classification by Optical Pulse Sensor using Arterial Pulse Waves." In 2020 2nd International Conference on Innovative Mechanisms for Industry Applications (ICIMIA). IEEE, 2020. http://dx.doi.org/10.1109/icimia48430.2020.9074844.

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Lu, Wen-Qiang, and Qing-Mei Fan. "Non-Fourier Heat Conduction Phenomena Applied Different Temperature and Heat Flux Pulses on Boundary." In ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer. ASMEDC, 2008. http://dx.doi.org/10.1115/mnht2008-52287.

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A new numerical method [1], which combines the dual reciprocity boundary element method with Laplace transforms, has been used to solve ultrafast heat conduction problems. By this method, the time micro scale heat transfer problems applied different extreme high frequency temperature and heat flux pulses (the width of a single pulse is less than 10−12 s) on the boundary are simulated in this paper. Numerical results open out some phenomena of non-Fourier heat conduction. “Thermal accumulation (TA)” as a typical phenomenon of non-Fourier heat conduction takes on different characteristics under different pulsed conditions. The pulse time-width has important effect on the non-Fourier characteristics for single pulse, while different pulse periods for seriate pulse make obvious different non-Fourier characteristics.
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Matsuda, Atsushi, Takeharu Sakai, and Akihiro Sasoh. "Ablation Impulse Characteristics by Laser Pulse Irradiation." In 47th AIAA Aerospace Sciences Meeting including The New Horizons Forum and Aerospace Exposition. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2009. http://dx.doi.org/10.2514/6.2009-251.

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Reports on the topic "PULSE CHARACTERISTICS"

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Vineyard, Gerald E. Investigation of the Current Turn-off Characteristics of a GTO Thyristor in an Inductive Pulse Forming Network. Fort Belvoir, VA: Defense Technical Information Center, May 2008. http://dx.doi.org/10.21236/ada485932.

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Hawley. PR-015-11707-R01 Test Diagnostic Methods for Turbine Gas Meters. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), July 2013. http://dx.doi.org/10.55274/r0010671.

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Similar to most metering technologies, turbine meters are known to be affected by abnormal flow or abnormal mechanical conditions which can cause bias in flow measurement. These types of flow conditions include blockage at the flow meter or straightening vanes, grime or liquid contamination on the internal meter components, damage to the internal meter components, and pulsation in the flow. With the introduction of ultrasonic and Coriolis meters for gas applications, the natural gas industry has embraced the concept of meters with embedded diagnostic capabilities. These capabilities allow the detection of potential problems with the flow behavior or meter condition that may lead to measurement error. Diagnostic measurements also exist for turbine meters. Some turbine meter manufacturers provide techniques for diagnosing proper meter performance through approaches that include unique design attributes (e.g., dual-rotors) or by monitoring the characteristics (shape, timing, etc.) of the pulses produced as blades pass a sensor. Various analog and digital signal analysis methods exist to interpret the output pulse characteristics to determine meter condition attributes such as bent blades and bearing wear. The objective of this research was to assess, through flow testing, the ability of various diagnostic methods to detect abnormal flow and abnormal mechanical conditions for both single and dual-rotor turbine meters. A secondary objective was to determine the amount of flow measurement error that could be present for the various flow conditions that were tested. The approach was to test three different diagnostic methods on a single-rotor and dual-rotor turbine meter at the Metering Research Facility at Southwest Research Institute. The selected diagnostic methods were the Smith MeterTM AccuLERT II from FMC Technologies, TurbinScope from Elster-Instromet, and The Turbo Corrector from Mercury Instruments. Tests were performed under controlled conditions and were designed to determine the ability of the selected diagnostics to detect various levels of flow meter or tube bundle blockage, grime buildup on the rotor or rotor bearings, damage to the rotor, or flow pulsations.
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Choueiri, Edgar. Gas-Fed Pulsed Plasma Thrusters: Fundamentals, Characteristics and Scaling Laws. Fort Belvoir, VA: Defense Technical Information Center, December 2000. http://dx.doi.org/10.21236/ada387454.

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Wang, Yong-Yi. PR-350-124504-R02 Essential Welding Variables Methodology for X70-X65 Linepipe Steels. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), December 2015. http://dx.doi.org/10.55274/r0010887.

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High productivity mechanized welding processes, such as variants of multi-wire pulsed-gas metal arc welding (GMAW-P) have become increasingly popular due to their high production rates. Compared to the conventional single-wire GMAW processes, the high-productivity pro-cesses are more complex in welding procedure design, qualification, and field welding. The characteristics of these high productivity processes are different from that of the traditional sin-gle-wire/single-torch GMAW or shielded metal arc (manual) welding (SMAW) processes that have dominated pipeline construction in the past. The objective of this project is to validate the essential welding variable methodology (EWVM) for welding of X70/X65 line pipes steels by modern, high-productivity pulsed-gas metal arc welding (GMAW-P) techniques to achieve de-sired weld properties while keeping the cost and time of welding procedure qualification to a minimum level.
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Jerng, D. W., and J. M. Carpenter. Heat generation and neutron beam characteristics in a high power pulsed spallation neutron source. Office of Scientific and Technical Information (OSTI), November 1996. http://dx.doi.org/10.2172/396586.

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Bane, Sally, Alexey Shashurin, Allen Garner, and Carlo Scalo. FINAL TECHNICAL REPORT: Nanosecond Repetitively Pulsed (NRP) Plasmas: Relationship Between Induced Flow and Plasma Characteristics at Atmospheric Pressure. Office of Scientific and Technical Information (OSTI), September 2022. http://dx.doi.org/10.2172/1887575.

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Mazzoni, Silvia, Nicholas Gregor, Linda Al Atik, Yousef Bozorgnia, David Welch, and Gregory Deierlein. Probabilistic Seismic Hazard Analysis and Selecting and Scaling of Ground-Motion Records (PEER-CEA Project). Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, November 2020. http://dx.doi.org/10.55461/zjdn7385.

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This report is one of a series of reports documenting the methods and findings of a multi-year, multi-disciplinary project coordinated by the Pacific Earthquake Engineering Research Center (PEER) and funded by the California Earthquake Authority (CEA). The overall project is titled “Quantifying the Performance of Retrofit of Cripple Walls and Sill Anchorage in Single-Family Wood-Frame Buildings,” henceforth referred to as the “PEER–CEA Project.” The overall objective of the PEER–CEA Project is to provide scientifically based information (e.g., testing, analysis, and resulting loss models) that measure and assess the effectiveness of seismic retrofit to reduce the risk of damage and associated losses (repair costs) of wood-frame houses with cripple wall and sill anchorage deficiencies as well as retrofitted conditions that address those deficiencies. Tasks that support and inform the loss-modeling effort are: (1) collecting and summarizing existing information and results of previous research on the performance of wood-frame houses; (2) identifying construction features to characterize alternative variants of wood-frame houses; (3) characterizing earthquake hazard and ground motions at representative sites in California; (4) developing cyclic loading protocols and conducting laboratory tests of cripple wall panels, wood-frame wall subassemblies, and sill anchorages to measure and document their response (strength and stiffness) under cyclic loading; and (5) the computer modeling, simulations, and the development of loss models as informed by a workshop with claims adjustors. This report is a product of Working Group 3 (WG3), Task 3.1: Selecting and Scaling Ground-motion records. The objective of Task 3.1 is to provide suites of ground motions to be used by other working groups (WGs), especially Working Group 5: Analytical Modeling (WG5) for Simulation Studies. The ground motions used in the numerical simulations are intended to represent seismic hazard at the building site. The seismic hazard is dependent on the location of the site relative to seismic sources, the characteristics of the seismic sources in the region and the local soil conditions at the site. To achieve a proper representation of hazard across the State of California, ten sites were selected, and a site-specific probabilistic seismic hazard analysis (PSHA) was performed at each of these sites for both a soft soil (Vs30 = 270 m/sec) and a stiff soil (Vs30=760 m/sec). The PSHA used the UCERF3 seismic source model, which represents the latest seismic source model adopted by the USGS [2013] and NGA-West2 ground-motion models. The PSHA was carried out for structural periods ranging from 0.01 to 10 sec. At each site and soil class, the results from the PSHA—hazard curves, hazard deaggregation, and uniform-hazard spectra (UHS)—were extracted for a series of ten return periods, prescribed by WG5 and WG6, ranging from 15.5–2500 years. For each case (site, soil class, and return period), the UHS was used as the target spectrum for selection and modification of a suite of ground motions. Additionally, another set of target spectra based on “Conditional Spectra” (CS), which are more realistic than UHS, was developed [Baker and Lee 2018]. The Conditional Spectra are defined by the median (Conditional Mean Spectrum) and a period-dependent variance. A suite of at least 40 record pairs (horizontal) were selected and modified for each return period and target-spectrum type. Thus, for each ground-motion suite, 40 or more record pairs were selected using the deaggregation of the hazard, resulting in more than 200 record pairs per target-spectrum type at each site. The suites contained more than 40 records in case some were rejected by the modelers due to secondary characteristics; however, none were rejected, and the complete set was used. For the case of UHS as the target spectrum, the selected motions were modified (scaled) such that the average of the median spectrum (RotD50) [Boore 2010] of the ground-motion pairs follow the target spectrum closely within the period range of interest to the analysts. In communications with WG5 researchers, for ground-motion (time histories, or time series) selection and modification, a period range between 0.01–2.0 sec was selected for this specific application for the project. The duration metrics and pulse characteristics of the records were also used in the final selection of ground motions. The damping ratio for the PSHA and ground-motion target spectra was set to 5%, which is standard practice in engineering applications. For the cases where the CS was used as the target spectrum, the ground-motion suites were selected and scaled using a modified version of the conditional spectrum ground-motion selection tool (CS-GMS tool) developed by Baker and Lee [2018]. This tool selects and scales a suite of ground motions to meet both the median and the user-defined variability. This variability is defined by the relationship developed by Baker and Jayaram [2008]. The computation of CS requires a structural period for the conditional model. In collaboration with WG5 researchers, a conditioning period of 0.25 sec was selected as a representative of the fundamental mode of vibration of the buildings of interest in this study. Working Group 5 carried out a sensitivity analysis of using other conditioning periods, and the results and discussion of selection of conditioning period are reported in Section 4 of the WG5 PEER report entitled Technical Background Report for Structural Analysis and Performance Assessment. The WG3.1 report presents a summary of the selected sites, the seismic-source characterization model, and the ground-motion characterization model used in the PSHA, followed by selection and modification of suites of ground motions. The Record Sequence Number (RSN) and the associated scale factors are tabulated in the Appendices of this report, and the actual time-series files can be downloaded from the PEER Ground-motion database Portal (https://ngawest2.berkeley.edu/)(link is external).
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Bendikov, Michael, and Thomas C. Harmon. Development of Agricultural Sensors Based on Conductive Polymers. United States Department of Agriculture, August 2006. http://dx.doi.org/10.32747/2006.7591738.bard.

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In this 1-year feasibility study, we tried polymerization of several different monomers, commercial as well as novel, specially designed and synthesized for this project in the presence of the nitrate ion to produce imprinted conductive polymers. Polymers 1 and 2 (shown below) produced a response to nitrate, but one inferior to that produced by a polypyrrole (Ppy)-based sensor (which we demonstrated prior to this study). Thus, we elected to proceed with improving the stability of the Ppy-based sensor. In order to improve stability of the Ppy-based sensor, we created a two-layer design which includes nitrate-doped Ppy as an inner layer, and nitrate-doped PEDOT as the outer layer. PEDOT is known for its high environmental stability and conductivity. This design has demonstrated promise, but is still undergoing optimization and stability testing. Previously we had failed to create nitrate-doped PEDOT in the absence of a Ppy layer. Nitrate-doped PEDOT should be very promising for sensor applications due to its high stability and exceptional sensing properties as we showed previously for sensing of perchlorate ions (by perchlorate-doped PEDOT). During this year, we have succeeded in preparing nitrate-doped PEDOT (4 below) by designing a new starting monomer (compound 3 below) for polymerization. We are currently testing this design for nitrate sensing. In parallel with the fabrication design studies, we fabricated and tested nitrate-doped Ppy sensors in a series of flow studies under laboratory and field conditions. Nitrate-doped Ppy sensors are less stable than is desirable but provide excellent nitrate sensing characteristics for the short-term experiments focusing on packaging and deployment strategies. The fabricated sensors were successfully interfaced with a commercial battery-powered self-logging (Onset Computer Hobo Datalogger) and a wireless data acquisition and transmission system (Crossbow Technologies MDA300 sensor interface and Mica2 wireless mote). In a series of flow-through experiments with water, the nitrate-doped Ppy sensors were exposed to pulses of dissolved nitrate and compared favorably with an expensive commercial sensor. In 24-hour field tests in both Merced and in Palmdale, CA agricultural soils, the sensors responded to introduced nitrate pulses, but with different dynamics relative to the larger commercial sensors. These experiments are on-going but suggest a form factor (size, shape) effect of the sensor when deployed in a porous medium such as soil. To fill the need for a miniature reference electrode, we identified and tested one commercial version (Cypress Systems, ESA Mini-reference electrode) which works well but is expensive ($190). To create an inexpensive miniature reference electrode, we are exploring the use of AgCl-coated silver wire. This electrode is not a “true” reference electrode; however, it can calibrated once versus a commercial reference electrode at the time of deployment in soil. Thus, only one commercial reference electrode would suffice to support a multiple sensor deployment.
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Estimation of hydraulic characteristics in the Santa Fe Group aquifer system using computer simulations of river and drain pulses in the Rio Bravo study area, near Albuquerque, New Mexico. US Geological Survey, 2001. http://dx.doi.org/10.3133/wri014069.

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