Results 71 to 80 of about 7,966 (257)

Detection and estimation of generalized chirps using time-frequency representations4

, 1994
We propose techniques for the detection and parameter estimation of generalized chirps in the presence of noise. Generalized chirps are nonstationary signals characterized by group delays with specific dispersion law characteristics.
Papandreou, Antonia, Kay, Steven M., Boudreaux-Bartels, G. Faye   +2 more
core   +1 more source

Technology Transfer to Underwater Archaeology: The LAHKE Project at the Submerged Neolithic Site of La Marmotta

Archaeological Prospection, EarlyView.
ABSTRACT This document is a report on the field application of non‐invasive geophysical and robotic prospecting methods at the submerged Neolithic site of La Marmotta (Lake Bracciano, Italy), within the LAHKE (LAke Heritage Knowledge and Exploration) project; the study focuses on the practical validation, adaptation and transfer of existing ...
dell' Erba Ramiro, Cupertino Giacomo, Cipollini Angelo, Luciano Blasi, Quattrucci Luca   +4 more
wiley   +1 more source

Validation of new satellite rainfall products over the Upper Blue Nile Basin, Ethiopia [PDF]

Atmospheric Measurement Techniques, 2018
Accurate measurement of rainfall is vital to analyze the spatial and temporal patterns of precipitation at various scales. However, the conventional rain gauge observations in many parts of the world such as Ethiopia are sparse and unevenly ...
G. T. Ayehu, G. T. Ayehu, G. T. Ayehu, T. Tadesse, B. Gessesse, T. Dinku   +5 more
doaj   +1 more source

Embedding a Dinuclear Ru─Pt Photocatalyst Into Polyampholytic Graft Copolymer Matrix Enables Prolonged Hydrogen Evolution While Allowing Catalyst Repair

Chemistry – A European Journal, EarlyView.
A unimolecular polyampholytic graft copolymer matrix provides a protective confinement for an electrostatically embedded tetrapyridophenazine‐bridged heterodinuclear Ru‐Pt hydrogen evolving photocatalyst. The matrix slows the degradation kinetics of the catalyst and at the same time does not hinder its repair by ammonium persulfate.
Yurii Utievskyi, Alexander K. Mengele, Mariet Puthanagady, Nikita Vashistha, Linda Zedler, Christof Neumann, Marius Müßler, Andrey Turchanin, Benjamin Dietzek‐Ivanšić, Sven Rau, Felix H. Schacher   +10 more
wiley   +1 more source

Children & Infants Respiratory Protective System CHIRPS

, 2009
Children & infants’ respiratory protective system (CHIRPS) is a new innovative respiratory protective system (RPS) against chemical and biological (CB) hazards, designed to fit newborns, infants and children up to 10 years of age.
Tamar Miller Traugot, Uri Shuali, Yiftah Priel, Heli Honig, Yonit Lavie, Keren Hizkia, Gad Frishman, Reuven Fichman, Hadar Roter, Ido Nir, Esther Krasner   +10 more
core   +1 more source

A Co‐Designed Implicit‐Reset Path PFD and Current Mismatch Compensated CP Enabling Sub‐0.5% Mismatch and Dead Zone‐Free for Low‐Spur PLLs

International Journal of Circuit Theory and Applications, EarlyView.
A co‐designed implicit‐reset phase‐frequency detector (PFD) and nonlinear amplifier‐assisted charge pump (CP) achieve dead zone‐free operation from 10 MHz to 4.7 GHz with < 0.5% current mismatch without calibration, enabling −80 dBc of reference spur and 0.50 ps of RMS jitter in a 180 nm of CMOS PLL.
A. Ghaemnia, Jincheng Yang, Xiaojiong Fei, G. Zhang   +3 more
wiley   +1 more source

Interactions of chirped and chirp-free similaritons in optical fiber amplifiers

Nonlinear Optics: Materials, Fundamentals and Applications, 2007
We obtain exact self-similar solutions to an inhomogeneous nonlinear Schrödinger equation, describing propagation of optical pulses in fiber amplifiers with distributed dispersion and gain. We show that there exists a one-to-one correspondence between such self-similar waves and solitons of the standard, homogeneous, nonlinear Schrödinger equation if a
Sergey A, Ponomarenko, Govind P, Agrawal
openaire   +2 more sources

High‐Voltage Stability of LiCoO2 Cathode Materials Composited With Vanadium‐Based Glass Coatings

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Vanadium‐based glasses show fluidity and good wettability toward other materials at low temperatures. The controlled precipitation of nanocrystals in vanadium‐based glasses enhances the material's mechanical properties and electrical conductivity. The VPFL coatings bond to the LiCoO2 interface via chemical bonds.
Xu Wang, Zhiquan Su, Weiwen Chen, Qiang Chen, Yihong Chen, Fanhou Kong, Zhe Wang, Yao Zhou, Xiaolong Yu, Changjiu Li   +9 more
wiley   +1 more source

Auditory gamma‐band synchronization and attentional performance in juvenile myoclonic epilepsy

Epilepsia Open, EarlyView.
Abstract Objective Cognitive difficulties in juvenile myoclonic epilepsy (JME) are part of the clinical phenotype alongside epileptic seizures; however, the underlying neurophysiological mechanisms remain unclear. Auditory steady‐state responses (ASSRs) to repetitive 40‐ and 80‐Hz stimuli are widely used measures of gamma‐band oscillations (GBOs ...
Ryo Mitoma, Shunsuke Tamura, Yoji Hirano, Takako Mitsudo, Yubin Sung, Takahiko Mukaino, Takahiro Yamaguchi, Kou Matsumoto, Toshiaki Onitsuka, Shogo Hirano, Tomohiro Nakao, Noriko Isobe, Hiroshi Shigeto   +12 more
wiley   +1 more source

Evaluating the effectiveness of CHIRPS data for hydroclimatic studies [PDF]

Long-term gridded precipitation products (GPPs) are crucial for climatology and hydrological research to overcome the limitations of gauge observations.
Li, Longhui, Chun, Kwok, Tan, Mou Leong, Zhang, Fei, Du, Hongrong, Humayun Kabir, Muhammad   +5 more
core   +1 more source