Results 61 to 70 of about 95,355 (231)

Particle Emission-dependent Timing Noise of Pulsars?

, 2010
Though pulsars spin regularly, the differences between the observed and predicted ToA (time of arrival), known as "timing noise", can still reach a few milliseconds or more. We try to understand the noise in this paper.
Bailes M, Chukwude A E, Contopoulos I, Cordes J M, D'Alessandro F, Guo-Jun Qiao, Hobbs G, Jenet F A, Na X S, Ren-Xin Xu, Stinebring D R, Xiong-Wei Liu, Xu R X, Xue-Sen Na   +13 more
core   +1 more source

Message Time of Arrival Codes: A Fundamental Primitive for Secure Distance Measurement [PDF]

IEEE Symposium on Security and Privacy, 2019
Secure distance measurement and therefore secure Time-of-Arrival (ToA) measurement is critical for applications such as contactless payments, passive-keyless entry and start systems, and navigation systems.
Patrick Leu, Mridula Singh, Marc Roeschlin, K. Paterson, Srdjan Capkun   +4 more
semanticscholar   +1 more source

Micro‐Corrugated Hydrogel Electrodes for High‐Performance Biofuel Cells via Capillary Force and Ligand Exchange‐Induced Metal Nanoparticle Assembly

Small, EarlyView.
We present a high‐performance enzymatic biofuel cell based on a micro‐corrugated hydrogel electrode engineered via capillary force and ligand exchange‐induced assembly of tetra(octylammonium) (TOA)‐stabilized Au nanoparticles (Au NPs). The resulting metallic TOA‐Au NPs hydrogel structure enables seamless electron transfer and stable enzyme ...
Eunju Choi, Jun Hyung Kim, Su Hwan Kim, Hye Min Yu, Gee Chan Jin, Jeongmin Mo, Junha Pak, Seung‐Kyum Choi, Jongkuk Ko, Jinhan Cho, Cheong Hoon Kwon   +10 more
wiley   +1 more source

Numerical Investigation of the Time Discretization Impact on the Accuracy of a Point Target Localization by UWB Radar

EPJ Web of Conferences, 2018
UWB radar technologies enable localization of moving persons (targets) situated behind nonmetallic obstacles. Under exact knowledge of the propagation times, from the transmitting to the receiving antennas, of the radar emitted electromagnetic wave (time
Buša Ján, Kocur Dušan, Švecová Mária   +2 more
doaj   +1 more source

Autonomous orbit determination and navigation for formations of CubeSats beyond LEO [PDF]

, 2017
This paper investigates the use of the Time Of Arrival (TOA) and Doppler shift to allow a small formation of CubeSats to navigate beyond low Earth orbit (LEO).
Grey, Stuart, Serra, Romain, Torre, Francesco, Vasile, Massimiliano   +3 more
core   +2 more sources

Time‐Domain Computation of Propagation Characteristics of Partial Discharge in Cross‐Linked Polyethylene High‐Voltage Cable Incorporating Modified Frequency‐Dependent Parameters

High Voltage, EarlyView.
ABSTRACT The propagation characteristics of partial discharge (PD) in cables impact PD detection sensitivity, defect localisation accuracy and defect severity evaluation. Currently, the effects of semiconducting materials' frequency‐dependent properties and corrugated aluminium sheath structures on PD signal propagation in high‐voltage (HV) cables ...
Weisheng He, Yang You, Zhaoguo Wu, Zhe Hou, Xiong Liu, Xiao Ren, Yuan Yan   +6 more
wiley   +1 more source

Comparison of different X‐ray‐based scanning electron microscopy methods to detect sub‐nanometre ultra‐thin InAs layers deposited on top of GaAs

Journal of Microscopy, EarlyView.
Abstract We compare three different methods of X‐ray analysis in a scanning electron microscope (SEM): energy‐dispersive X‐ray spectroscopy (EDX), wavelength‐dispersive X‐ray spectroscopy (WDX) and micro X‐ray fluorescence (μXRF). These methods are all applied to the same gallium arsenide (GaAs) wafer with a 0.8 nm layer of indium arsenide (InAs) on ...
Thomas Walther, Stuart Creasey‐Gray, Stephan Boehm, Heath Young, Yang Yang   +4 more
wiley   +1 more source

Time of Arrival Based on Chirp Pulses as a means to Perform Localization in IEEE 802.15.4a Wireless Sensor Networks

Advances in Electrical and Computer Engineering, 2010
This paper introduces the technology Time of Arrival (TOA) based on chirp pulses (according to IEEE 802.15.4a) as a means to perform localization in Wireless Sensor Networks (WSN's) active at 2.4 GHz.
NAUWELAERS, B., De STRYCKER, L., GOEMAERE, J.-P., WYFFELS, J., Van NIEUWENHUYSE, A.   +4 more
doaj   +1 more source

A novel time of arrival estimation algorithm using an energy detector receiver in MMW systems

EURASIP Journal on Advances in Signal Processing, 2017
This paper presents a new time of arrival (TOA) estimation technique using an improved energy detection (ED) receiver based on the empirical mode decomposition (EMD) in an impulse radio (IR) 60 GHz millimeter wave (MMW) system.
Xiaolin Liang, Hao Zhang, Tingting Lyu, Han Xiao, T. Aaron Gulliver   +4 more
doaj   +1 more source

Multiresolution Time-of-arrival Estimation from Multiband Radio Channel Measurements [PDF]

IEEE International Conference on Acoustics, Speech, and Signal Processing, 2019
Achieving high resolution time-of-arrival (TOA) estimation in multipath propagation scenarios from bandlimited observations of communication signals is challenging because the multipath channel impulse response (CIR) is not bandlimited.
Tarik Kazaz, R. Rajan, G. Janssen, A. V. D. Veen   +3 more
semanticscholar   +1 more source