Bibliographies thématiques / Signal efficiency

Littérature scientifique sur le sujet « Signal efficiency »

Auteur : Grafiati
Publié le 11 mars 2023

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Articles de revues sur le sujet "Signal efficiency"

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de Ruijter, W. J., P. E. Mooney et O. L. Krivanek. « Signal transfer efficiency of slow-scan CCD cameras ». Proceedings, annual meeting, Electron Microscopy Society of America 51 (1 août 1993) : 1062–63. http://dx.doi.org/10.1017/s0424820100151143.

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Slow-scan CCD cameras are helping transmission electron microscopy and electron holography become increasingly quantitative. Accurate characterization of the performance of the cameras can extend this trend by making it possible to extract weak signals from noisy images with optimal precision. The property to be characterized is die performance of the camera in transferring a particular spatial frequency contained in the input electron image to the output image captured by a computer, as a function of the input intensity. Using the concepts and notation of standard signal processing theory, we characterize this performance by introducing signal transfer efficiency (STE) defined as:where SNRin(K) and SNRout(K) are signal-to-noise ratios at the input and the output of the image detector as a function of spatial frequency k. Signal-to-noise ratio is defined as SNR(K)=SII(K)/Snn(K) where SII(k) and Snn(k) denote the power spectra of the signal and the noise. STE could be regarded as an extension of the use of detection quantum efficiency as a figure of merit for electron image detectors.
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Pae, Suil. « Discretionary disclosure, efficiency, and signal informativeness ». Journal of Accounting and Economics 33, no 3 (août 2002) : 279–311. http://dx.doi.org/10.1016/s0165-4101(02)00057-5.

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Rosenberg, Dinah, et Nicolas Vieille. « On the Efficiency of Social Learning ». Econometrica 87, no 6 (2019) : 2141–68. http://dx.doi.org/10.3982/ecta15845.

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We revisit prominent learning models in which a sequence of agents make a binary decision on the basis of both a private signal and information related to past choices. We analyze the efficiency of learning in these models, measured in terms of the expected welfare. We show that, irrespective of the distribution of private signals, learning efficiency is the same whether each agent observes the entire sequence of earlier decisions or only the previous decision. In addition, we provide a simple condition on the signal distributions that is necessary and sufficient for learning efficiency. This condition fails to hold in many cases of interest. We discuss a number of extensions and variants.
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Kim, Seung Tae, Kap-Jin Kim, Ki-Won Song et Jae Min Ahn. « Performance of TPC based ranging signal for more than 2 services multiplexing ». E3S Web of Conferences 94 (2019) : 03007. http://dx.doi.org/10.1051/e3sconf/20199403007.

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This paper presents signal structure and power efficiency performance for simultaneous transmission of Global Navigation Satellite System (GNSS) service signals based on Tiered Polyphase Code (TPC). For the simultaneous transmission of three or more service signals, the intermodulation terms addition and modification of the power allocations for the signal multiplexing are applied first to the spreading signal with the binary pseudorandom noise (PRN) code and a constant envelope signal is generated. Then, Zadoff-Chu sequence is applied as a secondary code to generate a multiplexed satellite navigation signal having a constant envelope characteristic. Simulation results show that power efficiency performance of more than 80% can be achieved in three service signal multiplexing.
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Meng, Zhaokai, et Vladislav V. Yakovlev. « Optimizing signal collection efficiency of the VIPA-based Brillouin spectrometer ». Journal of Innovative Optical Health Sciences 08, no 04 (juillet 2015) : 1550021. http://dx.doi.org/10.1142/s1793545815500212.

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Brillouin spectroscopy is an emerging tool for microscopic optical imaging as it allows for noninvasive and direct assessment of the viscoelastic properties of materials. Recent advances of background-free confocal Brillouin spectrometer allows investigators to acquire the Brillouin spectra for turbid samples as well as transparent ones. However, due to strong signal loss induced by the imperfect optical setup, the Brillouin photons are usually immersed in background noise. In this report, we proposed and experimentally demonstrated multiple approaches to enhance the signal collection efficiency. A signal enhancement by > 4 times can be observed, enabling observation of ultra-weak signals.
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Tulyakova, N. O., et O. M. Trofymchuk. « Modified algorithms for signal nonlinear trend detection ». Radiotekhnika, no 206 (24 septembre 2021) : 137–51. http://dx.doi.org/10.30837/rt.2021.3.206.13.

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There is a problem of nonlinear (abrupt) signal trend detection in many digital signals processing practical applications. In particular, in the field of biomedical signals processing, the actual task is the elimination of abrupt signal baseline distortions caused by the patient's movements. For processing such signals containing edges and other discontinues, linear filtering based on discrete Fourier or cosine transforms leads to significant smoothing of a signal. Median type algorithms related to nonlinear stable (robust) filters are successfully applied for filtering such signals, in particular, high efficiency is provided by median hybrid filters with finite impulse response (FIR). The article considers simple algorithms of the class of FIR-median hybrid filters used for signal nonlinear trend detection. It is proposed to modify these algorithms by replacing the operation of finding the median of the data in the sliding filter window with the calculation of their myriad, as well as adding weights (number of duplications) to certain window elements. Statistical estimates of filter efficiency according to the mean square error (MSE) criterion for test signals like “step” and “ramp” edges, and triangular peak and parabola have been obtained. The high efficiency of the investigated nonlinear filters for the listed test signals types and the improvements achieved as a result of the proposed filter modifications are shown based on the analysis of the filter output signals and statistical estimates of their quality. Some examples of processing biomedical signals of electroencephalograms which illustrate good quality of noise suppression and signal abrupt changes preservation, and motion artifacts removal without large signal distortions are given.
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Brunetto, Paola, Luigi Fortuna, Pietro Giannone, Salvatore Graziani et Salvatore Strazzeri. « Optimization of IPMC Actuator Conversion Efficiency ». Advances in Science and Technology 61 (septembre 2008) : 131–40. http://dx.doi.org/10.4028/www.scientific.net/ast.61.131.

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IPMCs are suitable candidates to realize artificial muscles for possible autonomous applications. In such a field power budget is of great importance. The goal of this paper is to maximize the IPMC electromechanical conversion efficiency in order to increase the performance of these transducers. More specifically, the optimal frequency, amplitude, and waveform to be used to drive the IPMC membrane has been investigated. By using a novel model of IPMC actuators, the waveform of the applied voltage signal that maximize the IPMC conversion efficiency was found. The amplitude of the first 15 harmonics of the IPMC driving signal was determined, for different constrains such as the minimum output power and the maximum input voltage. The paper reports about the proposed IPMC model, the optimization algorithm, the optimal driving signals, and the validation of the approach.
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Zhyrnov, V., S. Solonskaya et I. Shubin. « Evaluation of radar image processing efficiency based on intelligent analysis of processes ». Radiotekhnika, no 207 (24 décembre 2021) : 83–88. http://dx.doi.org/10.30837/rt.2021.4.207.09.

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The paper presents results of development of the method and experimental studies of the system for automatic detection of radar signals of aerial objects and their recognition with the processing of real records in surveillance radars. The relevance of this work consists in creation of algorithms for automatic information processing to ensure effective detection of useful signals due to accumulation of signal (energy) and semantic information. The method is based on the definition of semantic components at the stage of formation and analysis of the symbolic model of signals from point and extended air objects. Signal information is described by the predicate function of process knowledge of the formation and analysis of a symbolic model of a burst of impulse signals from point-like mobile aircraft such as an airplane, a helicopter, a UAV, and from extended atmospheric formations such as angel-echoes, clouds. As a result of semantic analysis of symbolic images of signal marks, classification distinctive features of air objects were obtained. The semantic components of the decision-making algorithm, similar to the decision-making algorithms used by the operator, have been investigated. In the developed algorithm, signal information is described by a predicate function on the set of signal mark pulse amplitudes that have exceeded a certain threshold value. Recognizing of aerial objects is carried out by solving the developed equations of predicate operations. The verification of the developed method was carried out on real data obtained on a survey radar of the centimeter range (pulse duration was 1 μs, probing frequency wass 365 Hz, survey period was 10 s). Based on these data, the types of characteristic marks of radar signals are modeled. According to the results of the experiments, they were all correctly identified.
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Němcová, Andrea, Radovan Smíšek, Lucie Maršánová, Lukáš Smital et Martin Vítek. « A Comparative Analysis of Methods for Evaluation of ECG Signal Quality after Compression ». BioMed Research International 2018 (18 juillet 2018) : 1–26. http://dx.doi.org/10.1155/2018/1868519.

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The assessment of ECG signal quality after compression is an essential part of the compression process. Compression facilitates the signal archiving, speeds up signal transmission, and reduces the energy consumption. Conversely, lossy compression distorts the signals. Therefore, it is necessary to express the compression performance through both compression efficiency and signal quality. This paper provides an overview of objective algorithms for the assessment of both ECG signal quality after compression and compression efficiency. In this area, there is a lack of standardization, and there is no extensive review as such. 40 methods were tested in terms of their suitability for quality assessment. For this purpose, the whole CSE database was used. The tested signals were compressed using an algorithm based on SPIHT with varying efficiency. As a reference, compressed signals were manually assessed by two experts and classified into three quality groups. Owing to the experts’ classification, we determined corresponding ranges of selected quality evaluation methods’ values. The suitability of the methods for quality assessment was evaluated based on five criteria. For the assessment of ECG signal quality after compression, we recommend using a combination of these methods: PSim SDNN, QS, SNR1, MSE, PRDN1, MAX, STDERR, and WEDD SWT.
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Zhang, Anan, Cong He, Maoyi Sun, Qian Li, Hong Wei Li et Lin Yang. « Partial discharge signal self-adaptive sparse decomposition noise abatement based on spectral kurtosis and S-transform ». COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 37, no 1 (2 janvier 2018) : 293–306. http://dx.doi.org/10.1108/compel-03-2017-0126.

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Purpose Noise abatement is one of the key techniques for Partial Discharge (PD) on-line measurement and monitoring. However, how to enhance the efficiency of PD signal noise suppression is a challenging work. Hence, this study aims to improve the efficiency of PD signal noise abatement. Design/methodology/approach In this approach, the time–frequency characteristics of PD signal had been obtained based on fast kurtogram and S-transform time–frequency spectrum, and these characteristics were used to optimize the parameters for the signal matching over-complete dictionary. Subsequently, a self-adaptive selection of matching atoms was realized when using Matching Pursuit (MP) to analyze PD signals, which leading to seldom noise signal element was represented in sparse decomposition. Findings The de-noising of PD signals was achieved efficiently. Simulation and experimental results show that the proposed method has good adaptability and significant noise abatement effect compared with Empirical Mode Decomposition, Wavelet Threshold and global signal sparse decomposition of MP. Originality/value A self-adaptive noise abatement method was proposed to improve the efficiency of PD signal noise suppression based on the signal sparse representation and its MP algorithm, which is significant to on-line PD measurement.
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Thèses sur le sujet "Signal efficiency"

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Berndsen, Kevin J. « Signal Optimization for Efficient High-Power Amplifier Operation ». University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1307985518.

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Alonso, Kevin. « A high efficiency method for exploiting an ultra fast opto-electric signal generator ». FIU Digital Commons, 1999. http://digitalcommons.fiu.edu/etd/1109.

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Simulations suggest that photomixing in resonant laser-assisted field emission could be used to generate and detect signals from DC to 100 THz. It is the objective of this research to develop a system to efficiently couple the microwave signals generated on an emitting tip by optical mixing. Four different methods for coupling are studied. Tapered Goubau line is found to be the most suitable. Goubau line theory is reviewed, and programs are written to determine loss on the line. From this, Goubau tapers are designed that have a 1:100 bandwidth. These tapers are finally simulated using finite difference time domain, to find the optimum design parameters. Tapered Goubau line is an effective method for coupling power from the field emitting tip. It has large bandwidth, and acceptable loss. Another important consideration is that it is the easiest to manufacture of the four possibilities studied, an important quality for any prototype.
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Pan, Lu. « Coding and Signal Processing Techniques for High Efficiency Data Storage and Transmission Systems ». Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/293753.

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Generally speaking, a communication channel refers to a medium through which an information-bearing signal is corrupted by noise and distortion. A communication channel may result from data storage over time or data transmission through space. A primary task for communication engineers is to mathematically characterize the channel to facilitate the design of appropriate detection and coding systems. In this dissertation, two different channel modeling challenges for ultra-high density magnetic storage are investigated: two-dimensional magnetic recording (TDMR) and bit-patterned magnetic recording (BPMR). In the case of TDMR, we characterize the error mechanisms during the write/read process of data on a TDMR medium by a finite-state machine, and then design a state-based detector that provides soft decisions for use by an outer decoder. In the case of BPMR, we employ an insertion/deletion (I/D) model. We propose a LDPC-CRC product coding scheme that enables the error detection without the involvement of Marker codes specifically designed for an I/D channel. We also propose a generalized Gilbert-Elliott (GE) channel to approximate the I/D channel in the sense of an equivalent I/D event rate. A lower bound of the channel capacity for the BPMR channel is derived, which supports our claim that commonly used error-correction codes are effective on the I/D channel under the assumption that I/D events are limited to a finite length. Another channel model we investigated is perpendicular magnetic recording model. Advanced signal processing for the pattern-dependent-noise-predictive channel detectors is our focus. Specifically, we propose an adaptive scheme for a hardware design that reduces the complexity of the detector and the truncation/saturation error caused by a fix-point representation of values in the detector. Lastly, we designed a sequence detector for compressively sampled Bluetooth signals, thus allowing data recovery via sub-Nyquist sampling. This detector skips the conventional step of reconstructing the original signal from compressive samples prior to detection. We also propose an adaptive design of the sampling matrix, which almost achieves Nyquist sampling performance with a relatively high compression ratio. Additionally, this adaptive scheme can automatically choose an appropriate compression ratio as a function of E(b)/N₀ without explicit knowledge of it.
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Gonzalez, Maria C., et George R. Branner. « EFFECTS OF NON- LINEAR AMPLIFICATION ON N-GMSK AND N-FQPSK SIGNAL STATISTICS ». International Foundation for Telemetering, 2004. http://hdl.handle.net/10150/605306.

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International Telemetering Conference Proceedings / October 18-21, 2004 / Town & Country Resort, San Diego, California
Digital modulation schemes that are power and bandwidth efficient are highly desirable. After non-linear amplification has been done, signal modulation schemes having constant or quasi-constant envelopes are not as susceptible to spectral regrowth as those with non-constant envelopes. Since such distortion generates interference in the adjacent channels, the power operation of the amplifier in non-constant envelope modulations is typically backed off, resulting in systems with reduced power efficiency. On the other hand, constant envelope modulation may have different bandwidth spectra. This paper examines the statistical characteristics of N-GMSK and N-FQPSK [1] signals to assess the bandwidth efficiency in the presence of amplifier nonlinearities.
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Schmitz, Michael J. « Multisine Excitation Design to Increase the Efficiency of System Identification Signal Generation and Analysis ». Diss., North Dakota State University, 2012. https://hdl.handle.net/10365/26701.

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Reducing sample frequencies in measurement systems can save power, but reduction to the point of undersampling results in aliasing and possible signal distortion. Nonlinearities of the system under test can also lead to distortions prior to measurement. In this dissertation, a first algorithm is presented for designing multisine excitation signals that can be undersampled without distortion from the aliasing of excitation frequencies or select harmonics. Next, a second algorithm is presented for designing undersampled distributions that approximate target frequency distributions. Results for pseudo-logarithmically-spaced frequency distributions designed for undersampling without distortion from select harmonics show a considerable decrease in the required sampling frequency and an improvement in the discrete Fourier transform (DFT) bin utilization compared to similar Nyquist-sampled output signals. Specifically, DFT bin utilization is shown to improve by eleven-fold when the second algorithm is applied to a 25 tone target logarithmic-spaced frequency distribution that can be applied to a nonlinear system with 2nd and 3rd order harmonics without resulting in distortion of the excitation frequencies at the system output. This dissertation also presents a method for optimizing the generation of multisine excitation signals to allow for significant simplifications in hardware. The proposed algorithm demonstrates that a summation of square waves can sufficiently approximate a target multisine frequency distribution while simultaneously optimizing the frequency distribution to prevent corruption from some non-fundamental harmonic frequencies. Furthermore, a technique for improving the crest factor of a multisine signal composed of square waves shows superior results compared to random phase optimization, even when the set of obtainable signal phases is restricted to a limited set to further reduce hardware complexity.
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Qian, Hua. « Power Efficiency Improvements for Wireless Transmissions ». Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/11649.

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Many communications signal formats are not power efficient because of their large peak-to-average power ratios (PARs). Moreover, in the presence of nonlinear devices such as power amplifiers (PAs) or mixers, the non-constant-modulus signals may generate both in-band distortion and out-of-band interference. Backing off the signal to the linear region of the device further reduces the system power efficiency. To improve the power efficiency of the communication system, one can pursue two approaches: i) linearize the PA; ii) reduce the high PAR of the input signal. In this dissertation, we first explore the optimal nonlinearity under the peak power constraint. We show that the optimal nonlinearity is a soft limiter with a specific gain calculated based on the peak power limit, noise variance, and the probability density function of the input amplitude. The result is also extended to the fading channel case. Next, we focus on digital baseband predistortion linearization for power amplifiers with memory effects. We build a high-speed wireless test-bed and carry out digital baseband predistortion linearization experiments. To implement adaptive PA linearization in wireless handsets, we propose an adaptive digital predistortion linearization architecture that utilizes existing components of the wireless transceiver to fulfill the adaptive predistorter training functionality. We then investigate the topic of PAR reduction for OFDM signals and forward link CDMA signals. To reduce the PAR of the OFDM signal, we propose a dynamic selected mapping (DSLM) algorithm with a two-buffer structure to reduce the computational requirement of the SLM method without sacrificing the PAR reduction capability. To reduce the PAR of the forward link CDMA signal, we propose a new PAR reduction algorithm by introducing a relative offset between the in-phase branch and the quadrature branch of the transmission system.
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Flanagan, T. B. « Signal controlled roundabouts : An investigation into the efficiency of signal controlled roundabouts utilizing simulation techniques with particular reference to junctions with three approaches ». Thesis, University of Bradford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376678.

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Deshpande, Vinit Vinod. « Evaluating the Impacts of Transit Signal Priority Strategies on Traffic Flow Characteristics:Case Study along U.S.1, Fairfax County, Virginia ». Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/31319.

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Transportation engineers and planners worldwide are faced with the challenge of improving transit services in urban areas using low cost means. Transit signal priority is considered to be an effective way to improve transit service reliability and efficiency. In light of the interest in testing and deploying transit signal priority on a major arterial in Northern Virginia, this research focuses on the impacts of transit signal priority in the U.S.1 corridor in Fairfax County in terms of benefits to transit and impacts on other traffic. Using a simulation tool, VISSIM, these impacts were assessed considering a ten second green extension priority strategy. The results of the simulation analysis indicated that the Fairfax Connector buses benefit from the green extension strategy with little to no impact on the other non-transit traffic. Overall, improvements of 3.61% were found for bus service reliability and 2.64% for bus efficiency, while negative impacts were found in the form of increases in queue lengths on side streets by a maximum value of approximately one vehicle. Because this research has provided a foundation for the evaluation of transit signal priority for VDOT and Fairfax County engineers and planners, future research can build upon this effort. Areas identified for future research include the provision of priority for the entire bus route; combination of emergency preemption and transit priority strategies; evaluation of other priority strategies using system- wide priority concepts; and the impacts of priority strategies in monetary terms.
Master of Science
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Kamdar, Vaibhavi Killol. « Evaluating the Transit Signal Priority Impacts along the U.S. 1 Corridor in Northern Verginia ». Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/30845.

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Heavy traffic volumes in peak hours accompanied by closely located signalized intersections and nearside bus stops on U.S. 1, result in congestion and traffic delays that bus transit may be able to alleviate to some extent. The capital investment and operating costs of other transit solutions such as â Bus Rapid Transitâ and â Heavy Rail Transitâ projects were found to be cost prohibitive compared to bus transit signal priority (TSP) options. Successful implementation of a limited TSP pilot project led local authorities to conclude that TSP should be extended to the full length of the Fairfax Connector bus routes on U.S. 1. This research focused on testing the impacts of a ten second green extension priority strategy for all the northbound transit buses in the morning peak period at twenty-six signalized intersections along U.S. 1. A micro simulation model VISSIM 3.7 was used to analyze the impacts of TSP. The simulation analysis indicates that the Fairfax Connector buses might benefit from the green extension strategy. Overall, improvements of up to 4% for transit travel time savings and 5-13% reduction in control delay for transit vehicles were observed. Considering all side street traffic, the total increase in maximum queue length might be up to 1.23%. Future research possibilities proposed include the evaluation of different priority strategies such as an early green, red truncation and queue jumps. Impacts of using a dedicated lane for transit buses along with TSP can also be evaluated. Conditional transit signal priority may also include bus occupancy levels and bus latenesses.
Master of Science
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Mallavarpu, Navin. « Large signal model development and high efficiency power amplifier design in cmos technology for millimeter-wave applications ». Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/44711.

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This dissertation presents a novel large signal modeling approach which can be used to accurately model CMOS transistors used in millimeter-wave CMOS power amplifiers. The large signal model presented in this work is classified as an empirical compact device model which incorporates temperature-dependency and device periphery scaling. These added features allow for efficient design of multi-stage CMOS power amplifiers by virtue of the process-scalability. Prior to the presentation of the details of the model development, background is given regarding the 90nm CMOS process, device test structures, de-embedding methods and device measurements, all of which are necessary preliminary steps for any device modeling methodology. Following discussion of model development, the design of multi-stage 60GHz Class AB CMOS power amplifiers using the developed model is shown, providing further model validation. The body of research concludes with an investigation into designing a CMOS power amplifier operating at frequencies close to the millimeter-wave range with a potentially higher-efficiency class of power amplifier operation. Specifically, a 24GHz 130nm CMOS Inverse Class F power amplifier is simulated using a modified version of the device model, fabricated and compared with simulations. This further demonstrates the robustness of this device modeling method.
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Livres sur le sujet "Signal efficiency"

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Arvan, Lanny. A model of efficiency wages as a signal of firm value. [Urbana, Ill.] : College of Commerce and Business Administration, University of Illinois at Urbana-Champaign, 1987.

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United States. National Aeronautics and Space Administration., dir. Pulse shaped 8-PSK bandwidth efficiency and spectral spike elimination. Las Cruces, N.M : New Mexico State University, 1998.

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United States. National Aeronautics and Space Administration., dir. Pulse shaped 8-PSK bandwidth efficiency and spectral spike elimination. Las Cruces, N.M : New Mexico State University, 1998.

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United States. National Aeronautics and Space Administration., dir. Pulse shaped 8-PSK bandwidth efficiency and spectral spike elimination. Las Cruces, N.M : New Mexico State University, 1998.

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United States. National Aeronautics and Space Administration., dir. Pulse shaped 8-PSK bandwidth efficiency and spectral spike elimination. Las Cruces, N.M : New Mexico State University, 1998.

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Flanagan, Thomas Bernard. Signal controlled roundabouts : An investigation into the efficiency of signal controlled roundabouts utilizing simulation techniques with particular reference to junctions with three approaches. Bradford, England : University of Bradford, 1987.

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Benkeser, Christian. Power efficiency and the mapping of communication algorithms into VLSI. Konstanz : Hartung-Gorre, 2010.

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Shishkin, Aleksey. Methods of digital processing and speech recognition. ru : INFRA-M Academic Publishing LLC., 2023. http://dx.doi.org/10.12737/1904325.

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The monograph discusses the theory, algorithms and practical methods of implementing digital processing and recognition of speech signals. The basics of mathematical analysis of digital signals necessary for speech processing are presented. The acoustic theory of speech formation with the construction of a general discrete model is briefly described. The main characteristic features of speech signals, as well as methods of their isolation are considered. Hidden Markov models and the architecture of traditional recognition systems based on them are described in detail. Weighted finite converters used to increase the efficiency and speed up the process of decoding acoustic signals are considered. The main architectures of artificial neural networks and examples of integrated (end-to-end) speech recognition systems based on them are presented. It is intended for students, postgraduates, researchers and specialists dealing with speech signal processing, pattern recognition and artificial intelligence.
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Rubak, Jan. Efficient spectral representation of measured signals. Ottawa : National Library of Canada, 2002.

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Veshkurtsev, Yury. THE FOUNDATIONS OF THE THEORY OF CONSTRUCTION OF NEW-GENERATION MODEMS. au : AUS PUBLISHERS, 2022. http://dx.doi.org/10.26526/monography_628a8925151ca0.71125494.

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The monography presents the fundamentals of the theory of construction new-generation modems. Modems are built on the principles of statistical communication theory, based on the use of a random signal (chaos) as a carrier of information. In such a signal, a characteristic function is modulated, which is a fundamental characteristic of a random process. The signal modulation and demodulation method is patented and allows you to create modems with efficiency and noise immunity indicators several orders of magnitude higher than those of the known devices of the same name. New-generation modems immediately improve the technical characteristics of digital IT equipment by several orders of magnitude, since they work without errors in wired and radio channels when receiving one hundred duodecillion of binary symbols. The book is recommended for scientists and specialists in the field of digital communication systems, statistical radio engineering and instrumentation, and may be useful for graduate students, masters and students of relevant specialties.
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Chapitres de livres sur le sujet "Signal efficiency"

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Werner, D., et P. Müller. « Communication and Efficiency in the Symbiotic Signal Exchange ». Dans Environmental Signal Processing and Adaptation, 9–37. Berlin, Heidelberg : Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-56096-5_2.

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Ramkaj, Athanasios T., Marcel J. M. Pelgrom, Michiel S. J. Steyaert et Filip Tavernier. « Architectural Considerations for High-Efficiency GHz-Range ADCs ». Dans Analog Circuits and Signal Processing, 57–120. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-22709-7_3.

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Yin, Xiaohu, et Yue Zhao. « Analysis of Transmission Efficiency of Magnetically Coupled Resonant Radio Energy ». Dans Sensor Networks and Signal Processing, 87–97. Singapore : Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4917-5_7.

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Zhao, Dixian, et Patrick Reynaert. « Low-Power and Efficiency Enhancement Techniques for mm-Wave PAs ». Dans Analog Circuits and Signal Processing, 59–86. Cham : Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-18839-3_4.

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Sorgonà, Agostino, et Maria Rosa Abenavoli. « Nitrogen in Citrus : Signal, Nutrient, and Use Efficiency ». Dans Advances in Citrus Nutrition, 231–44. Dordrecht : Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4171-3_16.

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Liao, Nannan, Hui Liu, Cheng Li, Xia Ren et Baolong Guo. « Simple Linear Iterative Clustering with Efficiency ». Dans Advances in Intelligent Information Hiding and Multimedia Signal Processing, 109–17. Singapore : Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1057-9_11.

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Pradhan, Arjyadhara, Babita Panda, Bhagabat Panda et Aradhana Khillo. « An Improved MPPT Technique for Increasing Efficiency of PV Module ». Dans Advances in Electrical Control and Signal Systems, 633–44. Singapore : Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5262-5_47.

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León, Javier, Juan José Escobar, Jesús González, Julio Ortega, Francisco Manuel Arrabal-Campos, Andrés Ortiz et Miguel Damas. « Recurrent Neural Networks and Efficiency in High-Dimensional EEG Classification ». Dans Bioengineering and Biomedical Signal and Image Processing, 297–310. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-88163-4_26.

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Fan, Zhang, et Zhang Hong. « Multiple LDPC Code Combined with OVCDM to Improve Signal Coding Efficiency and Signal Transmission Effects ». Dans Lecture Notes in Networks and Systems, 372–79. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80624-8_46.

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Yu, Jianjun, et Nan Chi. « High Spectral Efficiency Optical Four-Dimensional Modulation ». Dans Digital Signal Processing In High-Speed Optical Fiber Communication Principle and Application, 467–502. Singapore : Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3098-2_17.

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Actes de conférences sur le sujet "Signal efficiency"

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Lozovskiy, I. F. « Efficiency of Signal Censoring in Whitening Filters ». Dans 2006 8th International Conference on Actual Problems of Electronic Instrument Engineering. IEEE, 2006. http://dx.doi.org/10.1109/apeie.2006.4292367.

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Losev, Alexander A. « LINC Efficiency Improvement for Multichannel Signal Amplification ». Dans 2017 IVth International Conference on Engineering and Telecommunication (EnT). IEEE, 2017. http://dx.doi.org/10.1109/icent.2017.20.

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Dorosinsky, Leonid. « BOUNDARY ESTIMATES OF AN SIGNAL CLASSIFICATION EFFICIENCY ». Dans 19th SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings. STEF92 Technology, 2019. http://dx.doi.org/10.5593/sgem2019/2.2/s10.060.

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Lozovskiy, I. F. « Efficiency of Signal Censoring in Whitening Filters ». Dans 2006 8th International Conference on Actual Problems of Electronic Instrument Engineering. IEEE, 2006. http://dx.doi.org/10.1109/apeie.2006.4292488.

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Chen, Tao, Haesik Kim et Yang Yang. « Energy efficiency metrics for green wireless communications ». Dans Signal Processing (WCSP 2010). IEEE, 2010. http://dx.doi.org/10.1109/wcsp.2010.5633634.

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Schreurs, D., M. Myslinski et H. Taher. « Large-signal behavioural modelling - from transistor to amplifier ». Dans IET Seminar on High Efficiency Power Amplifier Design for Next Generation Wireless Applications. IEE, 2006. http://dx.doi.org/10.1049/ic:20060003.

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Mego, Roman, et Tomas Fryza. « Efficiency of the signal processing algorithms using signal-flow based mapping tool ». Dans 2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA. IEEE, 2015. http://dx.doi.org/10.1109/radioelek.2015.7129035.

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Curpen, Radu, Titus Balan, Ioan Alexandru Miclos et Ionut Comanici. « Assessment of Signal Jamming Efficiency Against LTE UAVs ». Dans 2018 12th International Conference on Communications (COMM). IEEE, 2018. http://dx.doi.org/10.1109/iccomm.2018.8453639.

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Curpen, Radu, Titus Balan, Ioan Alexandru Miclos et Ionut Comanici. « Assessment of Signal Jamming Efficiency Against LTE UAVs ». Dans 2018 12th International Conference on Communications (COMM). IEEE, 2018. http://dx.doi.org/10.1109/iccomm.2018.8484746.

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Ma, Zhan, et Andrew Segall. « Low Resolution Decoding for High-Efficiency Video Coding ». Dans Signal and Image Processing. Calgary,AB,Canada : ACTAPRESS, 2011. http://dx.doi.org/10.2316/p.2011.759-113.

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Rapports d'organisations sur le sujet "Signal efficiency"

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Burlage, R. S., A. V. Palumbo et J. McCarthy. Method efficiency and signal quantification of bacteria for a groundwater transport experiment. Office of Scientific and Technical Information (OSTI), avril 1995. http://dx.doi.org/10.2172/52802.

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Ehiabhi, Jolly, et Haifeng Wang. A Systematic Review of Machine Learning Models in Mental Health Analysis Based on Multi-Channel Multi-Modal Biometric Signals. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, février 2023. http://dx.doi.org/10.37766/inplasy2023.2.0003.

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Review question / Objective: A systematic review of Mental health diagnosis/prognoses of mental disorders using Machine Learning techniques with information from biometric signals. A review of the trend and status of these ML techniques in mental health diagnosis and an investigation of how these signals are used to help increase the efficiency of mental health disease diagnosis. Using Machine learning techniques to classify mental health diseases as against using only expert knowledge for diagnosis. Feature Extraction from signal gotten from biometric signals that help classify sleep disorders. Rationale: To review the application of ML techniques on multimodal and multichannel PSG datasets got from biosensors typically used in the Hospital. To help professionals grasp the steps of using machine learning to classify mental health diseases.
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Busso, Matías, Sebsatián Montaño et Juan S. Muñoz-Morales. Signaling Specific Skills and the Labor Market of College Graduates. Inter-American Development Bank, mars 2023. http://dx.doi.org/10.18235/0004759.

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We study how signaling skills that are specific to college majors affect labor market outcomes of college graduates. We rely on census-like data and a regression discontinuity design to study the impacts of a well-known award given to top performers on a mandatory nationwide exam in Colombia. The award allows students to signal their high level of specific skills when searching for a job. These students earn 7 to 12 percent more than otherwise identical students lacking the signal. This positive return persists five years after graduation. The signal mostly benefits workers who graduate from low-reputation colleges, and allows workers to find jobs in more productive firms and in sectors that better use their skills. We rule out that the positive earnings returns are explained by human capital. The signal favors mostly less advantaged groups, implying that reducing information frictions about students skills could potentially shrink earnings gaps. Our results imply that information policies like those that formally certify skills can improve the efficiency in talent allocation of the economy and, at the same time, level the playing field.
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Elmgren, Karson, Ashwin Acharya et Will Will Hunt. Superconductor Electronics Research. Center for Security and Emerging Technology, novembre 2021. http://dx.doi.org/10.51593/20210003.

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Devices based on superconductor electronics can achieve much higher energy efficiency than standard electronics. Research in superconductor electronics could advance a range of commercial and defense priorities, with potential applications for supercomputing, artificial intelligence, sensors, signal processing, and quantum computing. This brief identifies the countries most actively contributing to superconductor electronics research and assesses their relative competitiveness in terms of both research output and funding.
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Chamovitz, Daniel, et Albrecht Von Arnim. Translational regulation and light signal transduction in plants : the link between eIF3 and the COP9 signalosome. United States Department of Agriculture, novembre 2006. http://dx.doi.org/10.32747/2006.7696515.bard.

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The COP9 signalosome (CSN) is an eight-subunit protein complex that is highly conserved among eukaryotes. Genetic analysis of the signalosome in the plant model species Arabidopsis thaliana has shown that the signalosome is a repressor of light dependent seedling development as mutant Arabidopsis seedlings that lack this complex develop in complete darkness as if exposed to light. These mutant plants die following the seedling stage, even when exposed to light, indicating that the COP9 signalosome also has a central role in the regulation of normal photomorphogenic development. The biochemical mode of action of the signalosome and its position in eukaryotic cell signaling pathways is a matter of controversy and ongoing investigation, and recent results place the CSN at the juncture of kinase signaling pathways and ubiquitin-mediated protein degradation. We have shown that one of the many CSN functions may relate to the regulation of translation through the interaction of the CSN with its related complex, eukaryotic initiation factor (eIF3). While we have established a physical connection between eIF3 subunits and CSN subunits, the physiological and developmental significance of this interaction is still unknown. In an effort to understand the biochemical activity of the signalosome, and its role in regulating translation, we originally proposed to dissect the contribution of "h" subunit of eIF3 (eIF3h) along the following specific aims: (i) Isolation and phenotypic characterization of an Arabidopsis loss-of-function allele for eIF3h from insertional mutagenesis libraries; (ii) Creation of designed gain and loss of function alleles for eIF3h on the basis of its nucleocytoplasmic distribution and its yeast-two-hybrid interactions with other eIF3 and signalosome partner proteins; (iii) Determining the contribution of eIF3h and its interaction with the signalosome by expressing specific mutants of eIF3h in the eIF3h- loss-of function background. During the course of the research, these goals were modified to include examining the genetic interaction between csn and eif3h mutations. More importantly, we extended our effort toward the genetic analysis of mutations in the eIF3e subunit, which also interacts with the CSN. Through the course of this research program we have made several critical scientific discoveries, all concerned with the apparent diametrically opposed roles of eIF3h and eIF3e. We showed that: 1) While eIF3e is essential for growth and development, eIF3h is not essential for growth or basal translation; 2) While eIF3e has a negative role in translational regulation, eIF3h is positively required for efficient translation of transcripts with complex 5' UTR sequences; 3) Over-accumulation of eIF3e and loss-of-function of eIF3h both lead to cop phenotypes in dark-grown seedlings. These results were published in one publication (Kim et al., Plant Cell 2004) and in a second manuscript currently in revision for Embo J. Are results have led to a paradigm shift in translation research – eIF3 is now viewed in all systems as a dynamic entity that contains regulatory subuits that affect translational efficiency. In the long-term agronomic outlook, the proposed research has implications that may be far reaching. Many important plant processes, including developmental and physiological responses to light, abiotic stress, photosynthate, and hormones operate in part by modulating protein translation [23, 24, 40, 75]. Translational regulation is slowly coming of age as a mechanism for regulating foreign gene expression in plants, beginning with translational enhancers [84, 85] and more recently, coordinating the expression of multiple transgenes using internal ribosome entry sites. Our contribution to understanding the molecular mode of action of a protein complex as fundamental as eIF3 is likely to lead to advances that will be applicable in the foreseeable future.
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Coplin, David L., Shulamit Manulis et Isaac Barash. roles Hrp-dependent effector proteins and hrp gene regulation as determinants of virulence and host-specificity in Erwinia stewartii and E. herbicola pvs. gypsophilae and betae. United States Department of Agriculture, juin 2005. http://dx.doi.org/10.32747/2005.7587216.bard.

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Gram-negative plant pathogenic bacteria employ specialized type-III secretion systems (TTSS) to deliver an arsenal of pathogenicity proteins directly into host cells. These secretion systems are encoded by hrp genes (for hypersensitive response and pathogenicity) and the effector proteins by so-called dsp or avr genes. The functions of effectors are to enable bacterial multiplication by damaging host cells and/or by blocking host defenses. We characterized essential hrp gene clusters in the Stewart's Wilt of maize pathogen, Pantoea stewartii subsp. stewartii (Pnss; formerly Erwinia stewartii) and the gall-forming bacterium, Pantoea agglomerans (formerly Erwinia herbicola) pvs. gypsophilae (Pag) and betae (Pab). We proposed that the virulence and host specificity of these pathogens is a function of a) the perception of specific host signals resulting in bacterial hrp gene expression and b) the action of specialized signal proteins (i.e. Hrp effectors) delivered into the plant cell. The specific objectives of the proposal were: 1) How is the expression of the hrp and effector genes regulated in response to host cell contact and the apoplastic environment? 2) What additional effector proteins are involved in pathogenicity? 3) Do the presently known Pantoea effector proteins enter host cells? 4) What host proteins interact with these effectors? We characterized the components of the hrp regulatory cascade (HrpXY ->7 HrpS ->7 HrpL ->7 hrp promoters), showed that they are conserved in both Pnss and Fag, and discovered that the regulation of the hrpS promoter (hrpSp) may be a key point in integrating apoplastic signals. We also analyzed the promoters recognized by HrpL and demonstrated the relationship between their composition and efficiency. Moreover, we showed that promoter strength can influence disease expression. In Pnss, we found that the HrpXY two-component signal system may sense the metabolic status of the bacterium and is required for full hrp gene expression in planta. In both species, acyl-homoserine lactone-mediated quorum sensing may also regulate epiphytic fitness and/or pathogenicity. A common Hrp effector protein, DspE/WtsE, is conserved and required for virulence of both species. When introduced into corn cells, Pnss WtsE protein caused water-soaked lesions. In other plants, it either caused cell death or acted as an Avr determinant. Using a yeast- two-hybrid system, WtsE was shown to interact with a number of maize signal transduction proteins that are likely to have roles in either programmed cell death or disease resistance. In Pag and Pab, we have characterized the effector proteins HsvG, HsvB and PthG. HsvG and HsvB are homologous proteins that determine host specificity of Pag and Pab on gypsophila and beet, respectively. Both possess a transcriptional activation domain that functions in yeast. PthG was found to act as an Avr determinant on multiple beet species, but was required for virulence on gypsophila. In addition, we demonstrated that PthG acts within the host cell. Additional effector genes have been characterized on the pathogenicity plasmid, pPATHₚₐg, in Pag. A screen for HrpL- regulated genes in Pnsspointed up 18 candidate effector proteins and four of these were required for full virulence. It is now well established that the virulence of Gram-negative plant pathogenic bacteria is governed by Hrp-dependent effector proteins. However; the mode of action of many effectors is still unresolved. This BARD supported research will significantly contribute to the understanding of how Hrp effectors operate in Pantoea spp. and how they control host specificity and affect symptom production. This may lead to novel approaches for genetically engineering plants resistant to a wide range of bacterial pathogens by inactivating the Hrp effectors with "plantabodies" or modifying their receptors, thereby blocking the induction of the susceptible response. Alternatively, innovative technologies could be used to interfere with the Hrp regulatory cascade by blocking a critical step or mimicking plant or quorum sensing signals.
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Dickinson, Bradley W. Efficient Algorithms and Structures for Robust Signal Processing. Fort Belvoir, VA : Defense Technical Information Center, septembre 1986. http://dx.doi.org/10.21236/ada190311.

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Dickinson, Bradley W. Efficient Algorithms and Structures for Robust Signal Processing. Fort Belvoir, VA : Defense Technical Information Center, mai 1985. http://dx.doi.org/10.21236/ada166147.

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Goodman, Joel, Keith Forsythe et Benjamin Miller. Efficient Reconstruction of Block-Sparse Signals. Fort Belvoir, VA : Defense Technical Information Center, janvier 2011. http://dx.doi.org/10.21236/ada541046.

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Blum, Rick S. Energy Efficient Signal Detection for Army Applications Based on Ordering. Fort Belvoir, VA : Defense Technical Information Center, septembre 2011. http://dx.doi.org/10.21236/ada559168.

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