Relevant bibliographies by topics / Mobile signal

Academic literature on the topic 'Mobile signal'

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Published: 30 May 2022
Last updated: 31 May 2022

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Journal articles on the topic "Mobile signal"

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Hoole, Paul Ratnamahilan Polycarp, Lwin Maw Abdul Raheem, Ramiah Harikrishnan, Kanesan Jeevan, and Samuel Ratnajeevan Herbert Hoole. "A Three-Element Handheld Mobile Communication Antenna for Desired Signal Reception and Reflected Signal Cancellation." Materials Science Forum 721 (June 2012): 153–58. http://dx.doi.org/10.4028/www.scientific.net/msf.721.153.

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Abstract. Space diversity, where antennas are separated in space at the receiver, is considered one of the most effective ways of eliminating unwanted signals in order to maximize the signal to noise ratio of the desired signal. Moreover it may be used to receive a signal that has gone through less fading when the direct path signal may have undergone deep fade. In this paper we use analytical electromagnetic solutions for the radiated signals to implement antenna space diversity on small handheld receiver units of mobile stations. While using the standard time difference of arrival method to obtain a first approximation of the mobile station position, the electromagnetic model is used to determine a more accurate position of the mobile station. The performance of this method with a multi-element mobile station antenna is shown to give good position estimation in the presence of various of kinds noise. A three element mobile station receiver is for the first time reported to be able simultaneously to null a deeply faded signal in the Rayleigh fading environment, and maximize the signal strength. It is shown that a three element antenna may be used to eliminate an undesired signal, while it may maximize the reception of the desired signal. The transmitter does not require a training sequence, as in the case of an equalizer, since the entire signal processing of the electromagnetic signal is done at the mobile receiver.
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Puspitasari, Nutri, Siti Nurrochmah, and Dona Sandy Yudasmara. "PENGEMBANGAN MEDIA PELATIHAN SIGNAL-SIGNAL WASIT BOLAVOLI MENGGUNAKAN M-LEARNING." Gelanggang Pendidikan Jasmani Indonesia 1, no. 2 (December 31, 2017): 238. http://dx.doi.org/10.17977/um040v1i2p238-245.

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Abstrak:Tujuan penelitian dan pengembangan ini untuk mengembangkan media pelatihan signal-signal wasit bolavoli yang dikemas dalam bentuk buku digital mobile learning. Selain itu, media buku digital mobile learning diharapkan dapat mempermudah peserta kegiatan latihan untuk belajar dan mempraktekkan materi signal-signal wasit bolavoli secara mandiri. Model penelitian ini menggunakan model konseptual. Uji coba kelompok keseluruhan melibatkan 45 anggota kegiatan latihan. Produk yang dihasilkan dari penelitian ini adalah media pelatihan signal-signal wasit bolavoli menggunakan M-Learning. Dengan hasil analisis data uji coba kelompok kecil diperoleh persentase 89,33% dan hasil analisis data uji kelompok besar diperoleh persentase 92,81%. Kesimpulan pengembangan media pelatihan signal-signal wasit bolavoli menggunakan M-Learning dapat digunakan sebagai media yang tepat dan layak untuk anggota kegiatan Unit Aktivitas Bolavoli di Universitas Negeri Malang. Kata Kunci: Perwasitan bolavoli, Mobile Learning
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Springer, David B., Thomas Brennan, Ntobeko Ntusi, Hassan Y. Abdelrahman, Liesl J. Zühlke, Bongani M. Mayosi, Lionel Tarassenko, and Gari D. Clifford. "Automated signal quality assessment of mobile phone-recorded heart sound signals." Journal of Medical Engineering & Technology 40, no. 7-8 (September 23, 2016): 342–55. http://dx.doi.org/10.1080/03091902.2016.1213902.

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Kozel, V. M., D. A. Podvornaya, and K. A. Kovalev. "Peal factor of signals of 5G mobile service systems." Doklady BGUIR 18, no. 6 (October 1, 2020): 5–10. http://dx.doi.org/10.35596/1729-7648-2020-18-6-5-10.

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This article discusses the possible formats of signals of 5G mobile communication networks (NR, IMT-2020): configurations of the number of resource blocks and frequency shifts of subcarriers. modulation schemes, organizations of the physical level, as well as the broadband signals of these networks and, as a result, the need for introducing a margin on the linearity of the transceiver’s paths to eliminate distortion or the manifestation of blocking effects when the signal interferes with third-party means. We analyze the characteristics of the dynamic range of the signals from IMT-2020 ground mobile systems and make a conclusion about the noise-like signals. To find the ratio of the maximum amplitude to its average value and a given ratio not exceeded with a given probability, the Matlab mathematical models were used. We infer that the law of probability distribution of the module of the instantaneous amplitude of the 5G signals corresponds to the distribution characteristic of narrow-band radio noise. Based on the study, the peak factor of the signal of the IMT-2020 ground mobile systems for various variations is obtained and a sufficient level of power reserve is provided to ensure, with high probability, the transmission of the 5G signals through radio paths, eliminating signal distortion. The results of this study were applied in the examination of the electromagnetic compatibility of radio electronic devices of cellular mobile communications with existing and promising electronic means of civil and special purposes and in the study of the protection of ground satellite stations from the effects of radio electronic means of IMT-2020 cellular mobile telecommunication networks located at border territories.
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Wang, Hai, Baoshen Guo, Shuai Wang, Tian He, and Desheng Zhang. "CSMC." Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies 5, no. 4 (December 27, 2021): 1–22. http://dx.doi.org/10.1145/3494959.

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The rise concern about mobile communication performance has driven the growing demand for the construction of mobile network signal maps which are widely utilized in network monitoring, spectrum management, and indoor/outdoor localization. Existing studies such as time-consuming and labor-intensive site surveys are difficult to maintain an update-to-date finegrained signal map within a large area. The mobile crowdsensing (MCS) paradigm is a promising approach for building signal maps because collecting large-scale MCS data is low-cost and with little extra-efforts. However, the dynamic environment and the mobility of the crowd cause spatio-temporal uncertainty and sparsity of MCS. In this work, we leverage MCS as an opportunity to conduct the city-wide mobile network signal map construction. We propose a fine-grained city-wide Cellular Signal Map Construction (CSMC) framework to address two challenges including (i) the problem of missing and unreliable MCS data; (ii) spatio-temporal uncertainty of signal propagation. In particular, CSMC captures spatio-temporal characteristics of signals from both inter- and intra- cellular base stations and conducts missing signal recovery with Bayesian tensor decomposition to build large-area fine-grained signal maps. Furthermore, CSMC develops a context-aware multi-view fusion network to make full use of external information and enhance signal map construction accuracy. To evaluate the performance of CSMC, we conduct extensive experiments and ablation studies on a large-scale dataset with over 200GB MCS signal records collected from Shanghai. Experimental results demonstrate that our model outperforms state-of-the-art baselines in the accuracy of signal estimation and user localization.
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Sârbu, Annamaria, Paul Bechet, and Simona Miclăuș. "Mobile Phone User Exposure Assessment to UMTS and LTE Signals at Mobile Data Turn on by Applying an Original Method." International conference KNOWLEDGE-BASED ORGANIZATION 23, no. 3 (June 27, 2017): 114–19. http://dx.doi.org/10.1515/kbo-2017-0164.

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Abstract In order to provide assessment of mobile phone user exposure to electromagnetic fields emitted in the close vicinity of a mobile device we have measured real life UMTS and LTE signals at mobile data turn on. The paper presents some preliminary results of mobile phone user exposure assessment at mobile data turn by making use of a non-standardized procedure that enables the calculus of the radiated signal energy and duty cycle. Our results sustain that higher user exposure is expected within the first minute after mobile data is switched on as higher duty cycles and more than a third of the total radiated energy is found in this time period, as compared to the total signal monitoring time. Authors expect increased exposure if other application services are launched within this time frame. Moreover, special attention should be paid to user exposure assessment in the case of active call services with mobile data turned on. Because SAR is currently the sole standardized metrics in dosimetry, the authors propose the use of the measured signal radiated energy as well as the calculated duty cycle as complementary indicators of user exposure to electromagnetic fields in order to provide a more comprehensive view on mobile phone radiation exposure.
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Kim, Hyung-Bae, Man-Jun Kwon, Eun-Jong Cha, and Myung-Geun Chun. "Bio-Signal Acquisition System Using Mobile Device." Journal of Korean Institute of Intelligent Systems 15, no. 3 (June 1, 2005): 349–54. http://dx.doi.org/10.5391/jkiis.2005.15.3.349.

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., Aditya Kumar Dwivedi. "MOBILE SECURITY USING WI-FI SIGNAL STRENGTH." International Journal of Research in Engineering and Technology 03, no. 22 (June 25, 2014): 44–45. http://dx.doi.org/10.15623/ijret.2014.0322009.

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Angel Mercy, T., J. Jeshua Linu, and P. Subha Hency Jose. "Bio-Signal Monitoring System using Mobile Phone." DJ Journal of Advances in Electronics and Communication Engineering 4, no. 2 (May 26, 2018): 11–16. http://dx.doi.org/10.18831/djece.org/2018021002.

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Lim, Beomjae, Byunghun Jeong, and Jungsun Kim. "Mobile Attendance System using Bluetooth Signal Strength." KIISE Transactions on Computing Practices 24, no. 6 (June 30, 2018): 307–11. http://dx.doi.org/10.5626/ktcp.2018.24.6.307.

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Dissertations / Theses on the topic "Mobile signal"

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Athanasiadis, Tasso, and tas atha@bigpond net au. "Signal Processing Techniques for Mobile Multimedia Systems." RMIT University. Electrical and Computer Engineering, 2007. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080123.115457.

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Recent trends in wireless communication systems show a significant demand for the delivery of multimedia services and applications over mobile networks - mobile multimedia - like video telephony, multimedia messaging, mobile gaming, interactive and streaming video, etc. However, despite the ongoing development of key communication technologies that support these applications, the communication resources and bandwidth available to wireless/mobile radio systems are often severely limited. It is well known, that these bottlenecks are inherently due to the processing capabilities of mobile transmission systems, and the time-varying nature of wireless channel conditions and propagation environments. Therefore, new ways of processing and transmitting multimedia data over mobile radio channels have become essential which is the principal focus of this thesis. In this work, the performance and suitability of various signal processing techniques and transmission strategies in the application of multimedia data over wireless/mobile radio links are investigated. The proposed transmission systems for multimedia communication employ different data encoding schemes which include source coding in the wavelet domain, transmit diversity coding (space-time coding), and adaptive antenna beamforming (eigenbeamforming). By integrating these techniques into a robust communication system, the quality (SNR, etc) of multimedia signals received on mobile devices is maximised while mitigating the fast fading and multi-path effects of mobile channels. To support the transmission of high data-rate multimedia applications, a well known multi-carrier transmission technology known as Orthogonal Frequency Division Multiplexing (OFDM) has been implemented. As shown in this study, this results in significant performance gains when combined with other signal-processing techniques such as spa ce-time block coding (STBC). To optimise signal transmission, a novel unequal adaptive modulation scheme for the communication of multimedia data over MIMO-OFDM systems has been proposed. In this system, discrete wavelet transform/subband coding is used to compress data into their respective low-frequency and high-frequency components. Unlike traditional methods, however, data representing the low-frequency data are processed and modulated separately as they are more sensitive to the distortion effects of mobile radio channels. To make use of a desirable subchannel state, such that the quality (SNR) of the multimedia data recovered at the receiver is optimized, we employ a lookup matrix-adaptive bit and power allocation (LM-ABPA) algorithm. Apart from improving the spectral efficiency of OFDM, the modified LM-ABPA scheme, sorts and allocates subcarriers with the highest SNR to low-frequency data and the remaining to the least important data. To maintain a target system SNR, the LM-ABPA loading scheme assigns appropriate signal constella tion sizes and transmit power levels (modulation type) across all subcarriers and is adapted to the varying channel conditions such that the average system error-rate (SER/BER) is minimised. When configured for a constant data-rate load, simulation results show significant performance gains over non-adaptive systems. In addition to the above studies, the simulation framework developed in this work is applied to investigate the performance of other signal processing techniques for multimedia communication such as blind channel equalization, and to examine the effectiveness of a secure communication system based on a logistic chaotic generator (LCG) for chaos shift-keying (CSK).
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GOMES, RENATO ARREGUI. "RADIO SIGNAL BEHAVIOUR ON MICROCELLULAR MOBILE ENVIRONMENTS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1999. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=7473@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
Com o aumento da demanda pelos serviços celulares se faz necessário estudar e desenvolver técnicas cada vez mais sofisticadas para a melhoria da capacidade e da qualidade dos sistemas celulares. Uma destas é a utilização moderada de microcélulas em regiões urbanas, e em algumas situações em regiões suburbanas. Os maiores problemas da utilização de microcélulas são suas características de propagação, bem diferentes das características das células convencionais. Para melhor compreender as características de propagação de um sinal rádio móvel num ambiente microcelular, este trabalho se propôs a fazer um estudo experimental onde, fenômenos como forma de células, efeitos de sombreamento, multipercurso e outros, foram analisados. Um laboratório móvel foi montado e uma grande campanha de medidas foi realizada em ambientes urbanos de características diferentes. Análises determinísticas e estatísticas, foram realizadas para se determinar parâmetros como o fator de queda do sinal com a distância e o desvio padrão da variabilidade do sinal. Estes resultados são importantes para o cálculo aproximado da cobertura do sinal em regiões semelhantes às estudadas. Especial atenção foi dada ao cálculo do ponto de quebra da dependência do sinal com a distância. Este ponto define a transição entre a região de campo próximo e a região de difração, sendo fundamental para estudos de cobertura. Uma importante contribuição foi na determinação da dependência da cobertura do sinal com a altura da antena transmissora. Os resultados medidos ajudaram a caracterizar a célula e conseqüentemente obter informações para localizações ótimas das altura das antenas, além de definir a melhor cobertura que estas alturas podem oferecer. Uma análise estatística da variabilidade do sinal foi realizada e distribuições de probabilidade foram testados frente aos resultados experimentais. A determinação de parâmetros importantes destas distribuições ajudou na verificação da aderência destes modelos aos resultados medidos. Os resultados são de extrema importância para esclarecer aspectos de propagação do sinal em microcélulas e disponibilizar dados para a elaboração de modelos de predição para o cálculo da cobertura do sinal para o projetista, resultando numa melhoria da qualidade e da capacidade do sistema microcelular.
The ever-increasing demand for cellular services raises the necessity of developing more sophisticated techniques to improve system quality and capacity. One of the techniques is the use of microcells in urban and occasionally suburban regions. However, the major problems facing the microcell deployment are the microcells peculiar propagation characteristics, which are very different from the conventional cellular systems. In order to address this problem, an experimental study of cell shape, shadowing effects and multipath, was carried out. A mobile laboratory was assembled and extensive measurements on different urban environments were performed. Deterministic and statistical analysis were carried out to find the parameters such as path loss versus distance factor, and the standard deviation of signal variability. Special attention was given to the determination of the breaking point, transition between the near field and diffraction regions on line-of-sight path. An important contribution was on the study of the effects of transmitter antenna height on coverage. The measured results will help on cell characterization and on finding the best height for the base station antennas. A statistical analysis of signal variability was performed to determine the best-fit probability distribution function with parameters carefully calculated. The collected results are of extreme importance to clarify propagation aspects of microcellular signal and to make it available a huge data bank for elaboration of better prediction models which will produce better quality and capacity of the microcellular systems.
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Landqvist, Ronnie. "Signal processing techniques in mobile communication systems : signal separation, channel estimation and equalization /." Karlskrona : Blekinge Institute of Technology, 2005. http://www.bth.se/fou/Forskinfo.nsf/allfirst2/98bf8bfb44d67d86c1257099003e2fc1?OpenDocument.

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Holm, Rasmus. "Energy-Efficient Mobile Communication with Cached Signal Maps." Thesis, Linköpings universitet, Programvara och system, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-124607.

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Data communication over cellular networks is expensive for the mobile device in terms of energy, especially when the received signal strength (RSS) is low. The mobile device needs to amplify its transmission power to compensate for noise leading to an increased energy consumption. This thesis focuses on developing a RSS map for the third generation cellular technology (3G) which can be stored locally at the mobile device, and can be used for avoiding expensive communication in low RSS areas. The proposed signal map is created by crowdsourced information collected from several mobile devices. An application is used to collect data in the mobile device of the user and the application periodically sends the information back to the server which computes the total signal map. The signal map is composed of three levels of information: RSS information, data rate tests and estimated energy levels. The energy level categorizes the energy consumption of an area into "High", "Medium" or "Low" based on the RSS, data rate test information and an energy model developed from physical power measurements. The coarse categorization provides an estimation of the energy consumption at each location. It is evaluated by collecting data traces on a smartphone at different locations and comparing the measured energy consumption at each location to the energy level categories of the map. The RSS prediction is preliminarily evaluated by collecting new data along a path and comparing how well it correlates to the signal map. The evaluation in this thesis shows that with the current collected data there are not enough observations in the map to properly estimate the RSS. However, we believe that with more observations a more accurate evaluation could be done.
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Sonbas, Buket. "Signal Processing for Sensor Based Navigation of Mobile Robot." Thesis, Högskolan i Gävle, Avdelningen för elektronik, matematik och naturvetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-14230.

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A self-navigating, path following and obstacle avoiding mobile robot is difficult to realize especially when its sensors are strongly effected by noise. This MSc thesis is aimed at investigating a realistic scenario of an autonomous mobile robot simulated in the MatLab environment. The robot system is able to follow a given reference path by utilizing its onboard sensors and decision making capabilities to avoid collisions with arbitrarily placed obstacles along its path. A novel navigational algorithm based on modifying the robot’s way-points using the run-time sensory data is developed and used to go around obstacles and then rejoin the original travel path as needed. The thesis work explores the impact of varying noise in the sensory data and ways of improving the navigational accuracy via signal processing. The study is done in two major sections, the first focusing on the navigational aspects of the mobile robot and the second exploring the sensory data analyses issues. The robot considered has a triangular shape with two differentially driven wheels at the rear left and rear right corners for skid steering control and one castor wheel in the front corner for balance purposes. The sensing system of the mobile robot includes infrared range finders with viewing angles of 180 degrees placed on the corners of the robot, which are able to detect obstacles all around the robot allowing effective path planning to be carried out via the special-purpose developed navigational algorithms. A reference path in an obstacle cluttered environment is assumed to be available for the robot to follow while avoiding randomly placed obstacles as the two wheels are driven to navigate the robot along the path using the robot kinematics. For making the navigation mobility of the robot as realistic as possible, practical infrared sensors have been studied experimentally to determine their noise characteristics to include in the simulation studies and the noise levels easily varied to simulate low and high noise levels and assess their effects on the overall navigational precision. Signal processing methods are used to show that improvements in the navigational performance can be achieved when the noise levels are high.
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Prihodko, Nikolajs. "Machine Learning for Forecasting Signal Strength in Mobile Networks." Thesis, Linköpings universitet, Statistik och maskininlärning, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-154466.

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In this thesis we forecast the future signal strength of base stations in mobile networks. Better forecasts might improve handover of mobile phones between base stations, thus improving overall user experience. Future values are forecast using a series of past sig- nal strength measurements. We use vector autoregression (VAR), a multilayer perceptron (MLP), and a gated recurrent unit (GRU) network. Hyperparameters, including the set of lags, of these models are optimised using Bayesian optimisation (BO) with Gaussian pro- cess (GP) priors. In addition to BO of the VAR model, we optimise the set of lags in it using a standard bottom-up and top-down heuristic. Both approaches result in similar predictive mean squared error (MSE) for the VAR model, but BO requires fewer model estimations. The GRU model provides the best predictive performance out of the three models. How- ever, none of the models (VAR, MLP, or GRU) achieves the accuracy required for practical applicability of the results. Therefore, we suggest adding more information to the model or reformulating the problem.
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Chitraranjan, Charith Devinda. "Tracking Vehicles from Mobile Phone Received Signal Strength Sequences." Diss., North Dakota State University, 2015. http://hdl.handle.net/10365/25527.

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We address the problem of tracking vehicles from received signal strength (RSS) sequences generated by mobile phones carried in them. Our main objectives are to provide travel-time estimates for selected roads and provide personal navigation assistance when GPS is unavailable or undesirable. A mobile phone periodically measures the RSS levels from the associated cell tower and several (six for GSM) strongest neighbor cell towers. Each such measurement is known as an RSS fingerprint. In Chapter 3, we propose local alignment of mobile phone RSS measurements to track vehicles. We use local alignment instead of the traditionally used global alignment to allow for vehicles changing roads. More specifically, we use local dynamic time warping to align the RSS sequence of a phone, to a reference sequence that we had collected for the relevant road. Due to fluctuations in RSS levels and other effects, even at the same location, the set of cell towers reported in a fingerprint and their reported RSS levels vary over time. To model these variations, in Chapter 4.1, we propose a complete observation model for RSS fingerprints that specifies for each gird-location in the area of interest, the distribution of the probability of observing any fingerprint at that location. We then use it with a Dynamic Bayesian Network to track vehicles. Unlike traditional observation models, which model only the variation of the RSS levels, we model the variation of the set of cells reported in fingerprints as well. Accurate estimation of the parameters of either traditional or our complete observation model requires recording fingerprints by driving on the roads of interest, which is tedious and expensive. Therefore, to avoid such driving, we propose unsupervised learning in Chapter 5 to estimate model parameters using RSS sequences of phone calls made by road-users. Experiments with RSS data collected on five roads demonstrate that our proposed algorithms produce lower errors than relevant existing methods. Furthermore, application of our algorithms to real subscriber call traces produced travel-time estimates for a given road segment that were, on average, within 13% - 14% of travel-times computed through license plate recognition.
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Mehta, Mehul. "Power control for a mobile satellite system." Thesis, University of Southampton, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245306.

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Nordio, Alessandro. "Advanced signal processing algorithms for 3rd generation wireless mobile systems /." [S.l.] : [s.n.], 2002. http://library.epfl.ch/theses/?nr=2550.

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Wong, Hak Lim. "Signal strength-based location estimation in two different mobile networks." HKBU Institutional Repository, 2006. http://repository.hkbu.edu.hk/etd_ra/700.

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Books on the topic "Mobile signal"

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Murray-Smith, Roderick, ed. Mobile Social Signal Processing. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54325-8.

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Gorban, I. I. Mobile sonar systems: Optimization of space-time signal processing. Kiev: Naukova dumka, 2008.

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Active sensors for local planning in mobile robotics. River Edge, NJ: World Scientific, 2001.

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Casey, Donal. Channel estimation techniques for mobile communications. Dublin: University College Dublin, 1995.

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K, Kokula Krishna Hari, ed. Method to Provide Mobile Signal when the Network Provider Has Failed. Chennai, India: Association of Scientists, Developers and Faculties, 2016.

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Hanhart, Daniel. Mobile computing und RFID im facility management: Anwendungen, Nutzen und serviceorientierter Architekturvorschlag. Berlin: Springer, 2008.

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SDMA for multipath wireless channels: Limiting characteristics and stochastic models. Berlin: Springer·, 2003.

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Jans, David A. The mobile receptor hypothesis: The role of membrane receptor lateral movement in signal transduction. Austin: R.G. Landes, 1997.

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Vaughan, Rodney. Channels, Propagation and Antennas for Mobile Communications. Stevenage: IET, 2003.

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Southampton, England) IEE/EURASIP Conference on DSPenabledRadio (2nd 2005. The 2nd IEE/EURASIP Conference on DSPenabledRadio: 19-20 September 2005, University of Southampton, Southampton : organised by the IEE Signal Processing Professional Network and EURASIP ; co-organisers, EURASIP. London: Institution of Electrical Engineers, 2005.

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Book chapters on the topic "Mobile signal"

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Parsons, J. D., and J. G. Gardiner. "Propagation and signal strength prediction." In Mobile Communication Systems, 68–100. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4684-1526-1_3.

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Crossan, Andrew, Grégoire Lefebvre, Sophie Zijp-Rouzier, and Roderick Murray-Smith. "A Multimodal Contact List to Enhance Remote Communication." In Mobile Social Signal Processing, 84–100. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54325-8_9.

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Vinciarelli, Alessandro. "Mobile Phones and Social Signal Processing for Analysis and Understanding of Dyadic Conversations." In Mobile Social Signal Processing, 1–8. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54325-8_1.

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Favre, Sarah. "Turns Analysis for Automatic Role Recognition." In Mobile Social Signal Processing, 9–21. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54325-8_2.

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Valente, Fabio, and Alessandro Vinciarelli. "Speaker Diarization of Multi-party Conversations Using Participants Role Information: Political Debates and Professional Meetings." In Mobile Social Signal Processing, 22–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54325-8_3.

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Renaud, Karen, and Heather Crawford. "Invisible, Passive, Continuous and Multimodal Authentication." In Mobile Social Signal Processing, 34–41. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54325-8_4.

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Harper, Richard H. R. "The Metaphysics of Communications Overload." In Mobile Social Signal Processing, 42–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54325-8_5.

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Williamson, Julie R., and Stephen Brewster. "Capturing Performative Actions for Interaction and Social Awareness." In Mobile Social Signal Processing, 51–63. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54325-8_6.

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Trendafilov, Dari, Saija Lemmelä, and Roderick Murray-Smith. "Negotiation Models for Mobile Tactile Interaction." In Mobile Social Signal Processing, 64–73. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54325-8_7.

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Tünnermann, René, Christian Leichsenring, and Thomas Hermann. "Direct Tactile Coupling of Mobile Phones with the feelabuzz System." In Mobile Social Signal Processing, 74–83. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54325-8_8.

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Conference papers on the topic "Mobile signal"

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Vinciarelli, Alessandro, Roderick Murray-Smith, and Hervé Bourlard. "Mobile social signal processing." In the 12th international conference. New York, New York, USA: ACM Press, 2010. http://dx.doi.org/10.1145/1851600.1851731.

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Springer, D. B., T. Brennan, L. J. Zuhlke, H. Y. Abdelrahman, N. Ntusi, G. D. Clifford, B. M. Mayosi, and L. Tarassenko. "Signal quality classification of mobile phone-recorded phonocardiogram signals." In ICASSP 2014 - 2014 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE, 2014. http://dx.doi.org/10.1109/icassp.2014.6853814.

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Chin, Wen-Long, and Ming-Ju Lu. "Signal Detection for Mobile Devices." In 2019 7th International Conference on Information and Communication Technology (ICoICT). IEEE, 2019. http://dx.doi.org/10.1109/icoict.2019.8835236.

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Misic, Bojan, and Milan Bjelica. "Signal strength visualization in mobile networks." In 2013 21st Telecommunications Forum Telfor (TELFOR). IEEE, 2013. http://dx.doi.org/10.1109/telfor.2013.6716394.

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Ikekawa, M., M. Hori, K. Nadehara, T. Kumura, M. Yoshida, I. Kuroda, and T. Nishitani. "Multimedia signal processor for mobile applications." In IEEE International Conference on Multimedia and Expo, 2001. ICME 2001. IEEE, 2001. http://dx.doi.org/10.1109/icme.2001.1237695.

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Kuhlman, Michael J., Tsung-Hsueh Lee, and Pamela A. Abshire. "Mixed-signal odometry for mobile robotics." In SPIE Defense, Security, and Sensing, edited by Thomas George, M. Saif Islam, and Achyut K. Dutta. SPIE, 2013. http://dx.doi.org/10.1117/12.2016373.

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Zhu, Huijie, Wei Xu, Yalou Sang, Zhiqiang Yao, Limei Liu, and Moses C. Okonkw. "Mobile Communication Signal Selection Algorithm for Signal of Opportunity Navigation." In 2021 23rd International Conference on Advanced Communication Technology (ICACT). IEEE, 2021. http://dx.doi.org/10.23919/icact51234.2021.9370940.

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Zhu, Huijie, Wei Xu, Yalou Sang, Zhiqiang Yao, Limei Liu, and Moses C. Okonkw. "Mobile Communication Signal Selection Algorithm for Signal of Opportunity Navigation." In 2022 24th International Conference on Advanced Communication Technology (ICACT). IEEE, 2022. http://dx.doi.org/10.23919/icact53585.2022.9728807.

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Gappmair, Wilfried, Markus Flohberger, and Otto Koudelka. "Moment-Based Estimation of the Signal-to-Noise Ratio for Oversampled Narrowband Signals." In 2007 16th IST Mobile and Wireless Communications Summit. IEEE, 2007. http://dx.doi.org/10.1109/istmwc.2007.4299066.

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Xiong, Yingen, and Kari Pulli. "Sequential image stitching for mobile panoramas." In Signal Processing (ICICS). IEEE, 2009. http://dx.doi.org/10.1109/icics.2009.5397590.

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Reports on the topic "Mobile signal"

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Fisher, William, Paul Grassi, William C. Barker, Spike E. Dog, Santos Jha, William Kim, Taylor McCorkill, Joseph Portner, Mark Russell, and Sudhi Umarji. Mobile Application Single Sign-On: Improving Authentication for Public Safety First Responders. National Institute of Standards and Technology, August 2021. http://dx.doi.org/10.6028/nist.sp.1800-13.

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Jury, William A., and David Russo. Characterization of Field-Scale Solute Transport in Spatially Variable Unsaturated Field Soils. United States Department of Agriculture, January 1994. http://dx.doi.org/10.32747/1994.7568772.bard.

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This report describes activity conducted in several lines of research associated with field-scale water and solute processes. A major effort was put forth developing a stochastic continuum analysis for an important class of problems involving flow of reactive and non reactive chemicals under steady unsaturated flow. The field-scale velocity covariance tensor has been derived from local soil properties and their variability, producing a large-scale description of the medium that embodies all of the local variability in a statistical sense. Special cases of anisotropic medium properties not aligned along the flow direction of spatially variable solute sorption were analysed in detail, revealing a dependence of solute spreading on subtle features of the variability of the medium, such as cross-correlations between sorption and conductivity. A novel method was developed and tested for measuring hydraulic conductivity at the scale of observation through the interpretation of a solute transport outflow curve as a stochastic-convective process. This undertaking provided a host of new K(q) relationships for existing solute experiments and also laid the foundation for future work developing a self-consistent description of flow and transport under these conditions. Numerical codes were developed for calculating K(q) functions for a variety of solute pulse outflow shapes, including lognormal, Fickian, Mobile-Immobile water, and bimodal. Testing of this new approach against conventional methodology was mixed, and agreed most closely when the assumptions of the new method were met. We conclude that this procedure offers a valuable alternative to conventional methods of measuring K(q), particularly when the application of the method is at a scale (e.g. and agricultural field) that is large compared to the common scale at which conventional K(q) devices operate. The same problem was approached from a numerical perspective, by studying the feasibility of inverting a solute outflow signal to yield the hydraulic parameters of the medium that housed the experiment. We found that the inverse problem was solvable under certain conditions, depending on the amount of noise in the signal and the degree of heterogeneity in the medium. A realistic three dimensional model of transient water and solute movement in a heterogeneous medium that contains plant roots was developed and tested. The approach taken was to generate a single realization of this complex flow event, and examine the results to see whether features were present that might be overlooked in less sophisticated model efforts. One such feature revealed is transverse dispersion, which is a critically important component in the development of macrodispersion in the longitudinal direction. The lateral mixing that was observed greatly exceeded that predicted from simpler approaches, suggesting that at least part of the important physics of the mixing process is embedded in the complexity of three dimensional flow. Another important finding was the observation that variability can produce a pseudo-kinetic behavior for solute adsorption, even when the local models used are equilibrium.
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Alchanatis, Victor, Stephen W. Searcy, Moshe Meron, W. Lee, G. Y. Li, and A. Ben Porath. Prediction of Nitrogen Stress Using Reflectance Techniques. United States Department of Agriculture, November 2001. http://dx.doi.org/10.32747/2001.7580664.bard.

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Commercial agriculture has come under increasing pressure to reduce nitrogen fertilizer inputs in order to minimize potential nonpoint source pollution of ground and surface waters. This has resulted in increased interest in site specific fertilizer management. One way to solve pollution problems would be to determine crop nutrient needs in real time, using remote detection, and regulating fertilizer dispensed by an applicator. By detecting actual plant needs, only the additional nitrogen necessary to optimize production would be supplied. This research aimed to develop techniques for real time assessment of nitrogen status of corn using a mobile sensor with the potential to regulate nitrogen application based on data from that sensor. Specifically, the research first attempted to determine the system parameters necessary to optimize reflectance spectra of corn plants as a function of growth stage, chlorophyll and nitrogen status. In addition to that, an adaptable, multispectral sensor and the signal processing algorithm to provide real time, in-field assessment of corn nitrogen status was developed. Spectral characteristics of corn leaves reflectance were investigated in order to estimate the nitrogen status of the plants, using a commercial laboratory spectrometer. Statistical models relating leaf N and reflectance spectra were developed for both greenhouse and field plots. A basis was established for assessing nitrogen status using spectral reflectance from plant canopies. The combined effect of variety and N treatment was studied by measuring the reflectance of three varieties of different leaf characteristic color and five different N treatments. The variety effect on the reflectance at 552 nm was not significant (a = 0.01), while canonical discriminant analysis showed promising results for distinguishing different variety and N treatment, using spectral reflectance. Ambient illumination was found inappropriate for reliable, one-beam spectral reflectance measurement of the plants canopy due to the strong spectral lines of sunlight. Therefore, artificial light was consequently used. For in-field N status measurement, a dark chamber was constructed, to include the sensor, along with artificial illumination. Two different approaches were tested (i) use of spatially scattered artificial light, and (ii) use of collimated artificial light beam. It was found that the collimated beam along with a proper design of the sensor-beam geometry yielded the best results in terms of reducing the noise due to variable background, and maintaining the same distance from the sensor to the sample point of the canopy. A multispectral sensor assembly, based on a linear variable filter was designed, constructed and tested. The sensor assembly combined two sensors to cover the range of 400 to 1100 nm, a mounting frame, and a field data acquisition system. Using the mobile dark chamber and the developed sensor, as well as an off-the-shelf sensor, in- field nitrogen status of the plants canopy was measured. Statistical analysis of the acquired in-field data showed that the nitrogen status of the com leaves can be predicted with a SEP (Standard Error of Prediction) of 0.27%. The stage of maturity of the crop affected the relationship between the reflectance spectrum and the nitrogen status of the leaves. Specifically, the best prediction results were obtained when a separate model was used for each maturity stage. In-field assessment of the nitrogen status of corn leaves was successfully carried out by non contact measurement of the reflectance spectrum. This technology is now mature to be incorporated in field implements for on-line control of fertilizer application.
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Coyner, Kelley, and Jason Bittner. Automated Vehicles and Infrastructure Enablers. SAE International, March 2022. http://dx.doi.org/10.4271/epr2022008.

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Manufacturers and developers of automated vehicles (AVs) often maintain that no new infrastructure enablers are needed to achieve full AV deployment aside from existing infrastructure investments (e.g., connected traffic signals, designated stops, booking software, mobile applications, separated lanes). These groups hold that a state-of-good-repair and clean lane markings are sufficient; however, much of the US receives poor grades when it comes to these features. What do infrastructure owners and operators need to know about what constitutes effective lane markings or what to prioritize in terms of safety and mobility? How do policy considerations effect these choices? Automated Vehicles and Infrastructure Enablers the first in a series on AVs and infrastructure—considers ways in which infrastructure can speed or delay deployment, mitigate hazards, and capture benefits related to AV roll-out. Some of these benefits include accessibility, safety, reduced climate impacts, and integrated supply chain logistics.
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Sakhare, Rahul Suryakant, Jairaj Desai, Jijo K. Mathew, Woosung Kim, Justin Mahlberg, Howell Li, and Darcy M. Bullock. Evaluating the Impact of Vehicle Digital Communication Alerts on Vehicles. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317324.

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Traditional methods for communicating the presence of maintenance activities and work zones have been done with a variety of fixed signs. The increase of in-vehicle connectivity on our roads—either directly integrated into the vehicle or via an application running on a mobile phone–provides an opportunity for additional communication to motorists about the presence of emergency vehicles, maintenance activities, or work zones. Although the exact form of the in-vehicle communication is evolving and will continue to do so, a critical first step is to leverage the extensive telematics currently deployed on the Indiana Department of Transportation Vehicles. The objective of this study was to conduct trial deployments on a variety of INDOT vehicles, and to begin a dialog with private sector partners about what information INDOT can share that will provide a safer roadway for all motorists, INDOT workers, and INDOT partners. The final design of connected vehicles will likely change considerably over the next few years as market forces determine what type of information is directly integrated into the vehicle and what information is integrated via cell phones. This report identifies several examples where in-vehicle notification alerting drivers to the presence of service and contractor vehicles was acknowledged by drivers. Hard braking data is being used to determine if these alerts have a meaningful impact on safety. Early results indicate substantial reduction in hard braking events (from 29 to 3) between conditions when queue trucks are not used and when they are used. A larger data set is currently being collected with Hoosier Helpers to isolate the impact of the in-vehicle alerts.
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Moran, Nava, Richard Crain, and Wolf-Dieter Reiter. Regulation by Light of Plant Potassium Uptake through K Channels: Biochemical, Physiological and Biophysical Study. United States Department of Agriculture, September 1995. http://dx.doi.org/10.32747/1995.7571356.bard.

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The swelling of plant motor cells is regulated by various signals with almost unknown mediators. One of the obligatory steps in the signaling cascade is the activation of K+-influx channels -K+ channels activated by hyperpolarization (KH channels). We thus explored the regulation of these channels in our model system, motor cell protoplasts from Samanea saman, using patch-clamp in the "whole cell" configuration. (a) The most novel finding was that the activity of KH channels in situ varied with the time of the day, in positive correlation with cell swelling: in Extensor cells KH channels were active in the earlier part of the day, while in Flexor cells only during the later part of the day; (b) High internal pH promoted the activity of these channels in Extensor cells, opposite to the behavior of the equivalent channels in guard cells, but in conformity with the predicted behavior of the putative KH channel, cloned from S. saman recently; (c) HIgh external K+ concentration increased (KH channel currents in Flexor cells. BL depolarized the Flexor cells, as detected in cell-attached patch-clamp recording, using KD channels (the K+-efflux channels) as "voltage-sensing devices". Subsequent Red-Light (RL) pulse followed by Darkness, hyperpolarized the cell. We attribute these changes to the inhibition of the H+-pump by BL and its reactivation by RL, as they were abolished by an H+-pump inhibitor. BL increased also the activity KD channels, in a voltage-independent manner - in all probability by an independent signaling pathway. Blue-Light (BL), which stimulates shrinking of Flexor cells, evoked the IP3 signaling cascade (detected directly by IP3 binding assay), known to mobilize cytosolic Ca2+. Nevertheless, cytosolic Ca2+ . did not activate the KD channel in excised, inside-out patches. In this study we established a close functional similarity of the KD channels between Flexor and Extensior cells. Thus the differences in their responses must stem from different links to signaling in both cell types.
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Lindow, Steven, Isaac Barash, and Shulamit Manulis. Relationship of Genes Conferring Epiphytic Fitness and Internal Multiplication in Plants in Erwinia herbicola. United States Department of Agriculture, July 2000. http://dx.doi.org/10.32747/2000.7573065.bard.

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Most bacterial plant pathogens colonize the surface of healthy plants as epiphytes before colonizing internally and initiating disease. The epiphytic phase of these pathogens is thus an important aspect of their epidemiology and a stage at which chemical and biological control is aimed. However, little is known of the genes and phenotypes that contribute to the ability of bacteria to grow on leaves and survive the variable physical environment in this habitat. In addition, while genes such as hrp awr and others which confer pathogenicity and in planta growth ability have been described, their contribution to other aspects of bacterial epidemiology such as epiphytic fitness have not been addressed. We hypothesized that bacterial genes conferring virulence or pathogenicity to plants also contribute to the epiphytic fitness of these bacteria and that many of these genes are preferentially located on plasmids. We addressed these hypotheses by independently identifying genes that contribute to epiphytic fitness, in planta growth, virulence and pathogenicity in the phytopathogenic bacterium Erwinia herbicola pv gypsophilae which causes gall formation on gypsophila. This species is highly epiphytically fit and has acquired a plasmid (pPATH) that contains numerous pathogenicity and virulence determinants, which we have found to also contribute to epiphytic fitness. We performed saturation transposon mutagenesis on pPATH as well as of the chromosome of E.h. gypsophilae, and identified mutants with reduced ability to grow in plants and/or cause disease symptoms, and through a novel competition assay, identified mutants less able to grow or survive on leaves. The number and identity of plasmid-borne hrp genes required for virulence was determined from an analysis of pPATH mutants, and the functional role of these genes in virulence was demonstrated. Likewise, other pPATH-encoded genes involved in IAA and cytokinin biosynthesis were characterized and their pattern of transcriptional activity was determined in planta. In both cases these genes involved in virulence were found to be induced in plant apoplasts. About half of avirulent mutants in pPATH were also epiphytically unfit whereas only about 10% of chromosomal mutants that were avirulent also had reduced epiphytic fitness. About 18% of random mutants in pPATH were avirulent in contrast to only 2.5% of random chromosomal mutants. Importantly, as many as 28% of pPATH mutants had lower epiphytic fitness while only about 10% of random chromosomal mutants had lower epiphytic fitness. These results support both of our original hypotheses, and indicate that genes important in a variety of interactions with plant have been enriched on mobile plasmids such as pPATH. The results also suggest that the ability of bacteria to colonize the surface of plants and to initiate infections in the interior of plants involves many of the same traits. These traits also appear to be under strong regulatory control, being expressed in response to the plant environment in many cases. It may be possible to alter the pattern of expression of such genes by altering the chemical environment of plants either by genetic means or by additional or chemical antagonists of the plant signals. The many novel bacterial genes identified in this study that are involved in plant interactions should be useful in further understanding of bacterial plant interactions.
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