Results 21 to 30 of about 3,154 (112)

High prevalence of hepatitis C virus infection in patients with B-cell lymphoproliferative disorders in Italy. [PDF]

, 1997
Starting from the observation that a number of consecutive patients with non-Hodgkin's lymphoma (NHL) resulted positive for hepatitis C virus (HCV) antibodies on routine testing, we set up a survey for HCV contact prevalence in all patients with ...
Apuzzo A, Chiurazzi F, De Renzo A, De Rosa G, Garofalo S, Gobbo ML, Grimaldi M, Matarazzo M, Notaro R, PICARDI, MARCO, Rotoli B.   +10 more
core   +1 more source

Fundamental limits of quantum-secure covert optical sensing [PDF]

, 2017
We present a square root law for active sensing of phase $\theta$ of a single pixel using optical probes that pass through a single-mode lossy thermal-noise bosonic channel.
Bash, Boulat A., Datta, Animesh, Gagatsos, Christos N., Guha, Saikat   +3 more
core   +1 more source

Fundamental Limits of Communication with Low Probability of Detection

, 2016
This paper considers the problem of communication over a discrete memoryless channel (DMC) or an additive white Gaussian noise (AWGN) channel subject to the constraint that the probability that an adversary who observes the channel outputs can detect the
Wang, Ligong, Wornell, Gregory, Zheng, Lizhong   +2 more
core   +1 more source

Fluctuations in instantaneous frequency predict alpha amplitude during visual perception. [PDF]

, 2017
Rhythmic neural activity in the alpha band (8-13 Hz) is thought to have an important role in the selective processing of visual information. Typically, modulations in alpha amplitude and instantaneous frequency are thought to reflect independent ...
Itthipuripat, Sirawaj, Nelli, Stephanie, Serences, John T, Srinivasan, Ramesh   +3 more
core   +3 more sources

Performance evaluation of the time delay digital tanlock loop architectures [PDF]

, 2015
This article presents the architectures, theoretical analyses and testing results of modified time delay digital tanlock loop (TDTLs) system. The modifications to the original TDTL architecture were introduced to overcome some of the limitations of the ...
Al-Kharji Al-Ali O., Al-Kharji Al-Ali O., Anani N., Best R. E., Crawford J. A., Haykin S., Mahmoud Al-Qutayri, Nader Anani, Omar Al-Kharji Al-Ali, Peeblesand P. Z., Prasad Ponnapalli, Saleh Al-Araji   +11 more
core   +1 more source

High-Resolution, Low Probability of Detection Links Through SDRs

IEEE Journal of Microwaves
This paper presents the design and implementation of a low probability of detection (LPD) communication link using a software-defined radio (SDR) platform. The proposed LPD link was tested in an indoor environment using an over-the-air (OTA) network. The
John M. Willis, Arnaldo J. Sans, Kefayet Ullah, Satheesh Bojja Venkatakrishnan, John L. Volakis   +4 more
doaj   +1 more source

Low Probability of Intercept/Detect (LPI/LPD) Secure Communications Using Antenna Arrays Employing Rapid Sidelobe Time Modulation

IEEE Transactions on Antennas and Propagation
We present an electronically-reconfigurable antenna array offering low probability of intercept/detect (LPI/LPD) and secure communications capabilities simultaneously at the physical layer. This antenna array is designed to provide rapidly time-varying sidelobes and a stationary main lobe. By performing rapid sidelobe time modulation (SLTM), the signal
Jiahao Zhao, Shichen Qiao, John H. Booske, Nader Behdad   +3 more
openaire   +2 more sources

Segmentation of Fault Networks Determined from Spatial Clustering of Earthquakes

, 2010
We present a new method of data clustering applied to earthquake catalogs, with the goal of reconstructing the seismically active part of fault networks.
Allégre, Ben-Zion, Ben-Zion, Bishop, Bowman, Corduneanu, D. Sornette, de Joussineau, Duda, Eneva, Faulkner, G. Ouillon, Gardner, Hauksson, Hauksson, Helmstetter, Helmstetter, Helmstetter, Helmstetter, Kagan, Kagan, Kagan, Kagan, Kagan, Kagan, Kilb, Knopoff, Liu, Lyakhovsky, MacQueen, Manighetti, Marsan, Martel, Martel, Miltenberger, Nemser, Ouillon, Ouillon, Ouillon, Ouillon, Pisarenko, Plesch, Powers, Reasenberg, Robertson, Scholz, Scholz, Sornette, Sornette, Sornette, Sornette, Sornette, Sornette, Sornette, Sornette, Vermilye, Waldhauser, Wang, Weatherley, Willemse, Wilson, Zhou, Zhuang, Zhuang   +63 more
core   +1 more source

Discovery and Identification of W' and Z' in SU(2) x SU(2) x U(1) Models at the LHC

, 2012
We explore the discovery potential of W' and Z' boson searches for various SU(2) x SU(2) x U(1) models at the Large Hadron Collider (LHC), after taking into account the constraints from low energy precision measurements and direct searches at both the ...
Cao, Qing-Hong, Li, Zhao, Yu, Jiang-Hao, Yuan, C. -P.   +3 more
core   +1 more source

Dispensability of Escherichia coli's latent pathways

, 2011
Gene-knockout experiments on single-cell organisms have established that expression of a substantial fraction of genes is not needed for optimal growth.
A. E. Motter, Baba, Barab  si, Becker, Blank, Braunstein, Covert, Deluna, Deutscher, Edwards, Emmerling, Feist, Feist, Ferguson, Flores, Fong, Fong, Freilich, Gerdes, Giaever, Goyal, Gu, Hasona, Herring, Hillenmeyer, Hopkins, Hua, Ibarra, Ito, J. S. Lee, Kaufman, Klipp, Kupiec, Mahadevan, Motter, Motter, Nishikawa, Papp, Reed, Reed, S. P. Cornelius, Shi, Smith, Stern, Vinopal, Wagner   +45 more
core   +2 more sources