Results 51 to 60 of about 6,163,357 (346)

X-Ray Constraints on Wandering Black Holes in Stripped Galaxy Nuclei in the Halo of NGC 5128

open access: yesThe Astrophysical Journal
A subset of galaxies have dense nuclei, and when these galaxies are accreted and tidally stripped, the nuclei can masquerade as globular clusters in the halos of large galaxies.
Samuel L. Feyan   +8 more
doaj   +1 more source

A Highly Sensitive and Miniature Optical Fiber Sensor for Electromagnetic Pulse Fields

open access: yesSensors, 2021
The detection of an electromagnetic pulse (EMP) field is of great significance in determining the field environment of tested equipment in small spaces.
Min Zhao, Xing Zhou, Yazhou Chen
doaj   +1 more source

Photoionization in the time and frequency domain

open access: yes, 2017
Ultrafast processes in matter, such as the electron emission following light absorption, can now be studied using ultrashort light pulses of attosecond duration ($10^{-18}$s) in the extreme ultraviolet spectral range.
Arnold, C. L.   +13 more
core   +1 more source

Mapping the evolution of mitochondrial complex I through structural variation

open access: yesFEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin   +2 more
wiley   +1 more source

Waveform Analysis of UWB GPR Antennas

open access: yesSensors, 2009
Ground Penetrating Radar (GPR) systems fall into the category of ultra-wideband (UWB) devices. Most GPR equipment covers a frequency range between an octave and a decade by using short-time pulses.
Julia Armesto   +3 more
doaj   +1 more source

Time-domain parametric sensitivity analysis of multiconductor transmission lines [PDF]

open access: yes, 2011
We present a new parametric macromodeling technique for lossy and dispersive multiconductor transmission lines (MTLs). This technique can handle design parameters, such as substrate or geometrical layout features, and provide time-domain sensitivity ...
Antonini, G   +4 more
core   +2 more sources

Organoids in pediatric cancer research

open access: yesFEBS Letters, EarlyView.
Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

open access: yesFEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho   +3 more
wiley   +1 more source

A visual approximation of a Fourier transforms operation using GeoGebra [PDF]

open access: yesITM Web of Conferences
Many engineering fields use the Fourier Transform. The purpose of the Fourier Transform is to decompose periodic signals into fundamental frequencies and harmonic frequencies.
Suwarno Djoko Untoro
doaj   +1 more source

A Decoupling Method for Successive Robot Rotation Based on Time Domain Instantaneous Euler Angle

open access: yesMathematics, 2023
In the present study, a novel time domain decoupling method was proposed for the multiple successive rotations of different kinds of robots. This is achieved through the utilization of instantaneous Euler angles.
Xin Zhou, Jianxu Zhu
doaj   +1 more source

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