24 papers · ranked by Valyu relevance
Joel Hellewell, Samuel T. Horsfield, Johanna von Wachsmann, Tatiana Gurbich + 4 more
Metagenome Assembled Genomes (MAGs) are often incomplete, with sequences missing due to errors in assembly or low coverage. Incomplete MAGs present a particular challenge for identification of shared genes within a microbial population, known as core genes, as a core gene missing in only a few assemblies will result in…
Riccardo Iandolo, Marianna Semprini, Dante Mantini, Stefano Buccelli + 3 more
Recent studies provided novel insights into the meso-scale organization of the brain, highlighting the co-occurrence of different structures: classic assortative (modular), disassortative and core-periphery. However, the spectral properties of the brain meso-scale remain unexplored. To fill this knowledge gap, we…
Luke H. Ziolkowski, Yury A. Nikolaev, Akitoshi Chikamoto, Mai Oda + 8 more
Pacinian corpuscles are rapidly adapting mechanoreceptor end-organs that detect transient touch and high-frequency vibration. In the prevailing model, these properties are determined by the outer core, which acts as a mechanical filter limiting static and low-frequency stimuli from reaching the afferent terminal—the…
Shutang You, Hongyu Li, Shengyuan Liu, Kaiqi Sun + 3 more
'Wei Qiu' 'Yilu Liu'] Abstract— The power system frequency is important for the system overall stability. However, there does not exist a single measurement point of the system frequency due to the distributed nature of the system inertia and the small inconsistency of different generator rotors' electrical speeds in…
D Rubenstein
Compass mapping of moving rotors during atrial fibrillation unveiled unique properties of a different form of Doppler phenomenon. New rotational (RDE) and spiral Doppler effect (SDE) equations are derived and explain the diverging frequency changes (increasing and decreasing) that occur simultaneously on either side of…
Sheksha Dudekula, Aradhana Singh
The brain requires coordination among different regions to execute cognitive tasks, which may involve both positive- and negative-correlations. The topology of these correlations may indicate the mechanism underlying brain functioning in a given state. Here, we study changes in the functional connectomes (FCs) of both…
Francisco Portillo, Alfredo Alcayde, Rosa M. García, Nuria Novas + 3 more
The stability of the power grid’s frequency is crucial for industrial, commercial, and domestic applications. The standard frequency in Europe’s grid is 50 Hz and it must be as stable as possible; therefore, reliable measurement is essential to ensure that the frequency is within the limits defined in the standard EN…
Joan Gutierrez-Florensa, Alvaro Ortega, Lukas Sigrist, Federico Milano
'Federico Milano'] Abstract—Accurate frequency estimation is critical for the control, monitoring and protection of electrical power systems, in particular, of systems with a high penetration of power electronics. This paper introduces the novel concept of Quasi Steady-State (QSS) frequency as a quantity that fills the…
Felix Stete, Wouter Koopman, Carsten Henkel, Oliver Benson + 2 more
Light--matter coupling in plasmonic nanocavities has been widely studied in the past years. Yet, for core--shell particles, popular electromagnetic models that use the classical Lorentz oscillator to describe the shell predict extinction spectra with three maxima, if the plasmon and the shell absorption are in…
Talia L. Retter, Christine Schiltz
In frequency tagging, visual stimulation at a frequency (F) of ∼10 Hz has long been known to generate the highest-amplitude response at F in the frequency domain over the human occipital cortex with electroencephalogram and other high temporal-resolution methods. Brain responses are indeed commonly assessed simply at F…
P. Argoul, J. Taillard, F. Argoul
This paper revisits the continuous wavelet transform framework by establishing a rigorous physical and dimensional formulation of the Cauchy-Paul mother wavelet, tailored specifically for intermittent, non-sinusoidal electrophysiological oscillations. Departing from conventional, purely mathematical definitions, we…
Zachary T Sanger, Steffen Ventz, Robert A McGovern III, Theoden I Netoff
Chronic brain sensing devices, such as the Medtronic Percept™ or Neuropace RNS system, record local field potentials (LFPs) that may be vulnerable to interference and noise due to hardware limitations, environmental factors, movement, stimulation, cardiac signals, and analytical procedures. Although onboard hardware…
Zhenpeng Wang, Tao Yu, Yanlin Sui, Zhi Wang
In space gravitational wave detection missions, the laser heterodyne interference signal (LHI signal) has a high-dynamic characteristic due to the Doppler shift. Therefore, the three beat-notes frequencies of the LHI signal are changeable and unknown. This may further lead to the unlocking of the digital phase-locked…
Vasile V. Moca, Adriana Nagy-Dăbâcan, Harald Bârzan, Raul C. Mureşan
Time-frequency analysis is ubiquitous in many fields of science. Due to the Heisenberg-Gabor uncertainty principle, a single measurement cannot estimate precisely the localization of a finite oscillation in both time and frequency. Classical spectral estimators, like the short-time Fourier transform (STFT) or the…
Bhavnesh Jangid, Matthew R. Hermes, Laura Gagliardi
We investigate the use of density matrix embedding theory to facilitate the computation of core ionization energies (IP) of large molecules at the equation of motion coupled-cluster singles doubles with perturbative triples (EOM-CCSD*) level in combination with the core-valence separation (CVS) approximation. The…
Elena Serea, Codrin Donciu, Marinel Costel Temneanu, Mario Luiso + 1 more
The accurate frequency estimation of sinusoidal signals remains a key requirement in precision instrumentation and signal analysis, particularly in applications where noise and spectral leakage affect the measurement accuracy. This paper introduces a new frequency-domain technique, called IAE-DFT (Iterative Amplitude…
M. Alexander Ardagh, Omar A. Abdelrahman, Paul Dauenhauer
Acceleration of catalytic transformation of molecules via heterogeneous materials occurs through design of active binding sites to optimally balance the requirements of all steps in a catalytic cycle. In accordance with the Sabatier principle, the characteristics of a single binding site are balanced between at least…
Subrata Jana, John Herbert
Methods for computing x-ray absorption spectroscopy at the self-consistent field level are examined, based on a constrained core hole (possibly containing a fractional electron), and in some cases promoting an electron or a fraction of an electron into the virtual space. These methods are based on Slater's transition…
Md. Shoaibur Rahman
Here we present an algorithm to procedurally remap spectral contents of natural signals. The algorithm takes in two inputs: a signal whose spectral component needs to be remapped and a warping or remapping function. The algorithm generates one output, which is a remapped version of the original signal. The input signal…
Yifan Quan, Manoj V. H. Subramanya, Yifu Ouyang, Michael Mardini + 3 more
This paper presents a study of coherent dynamic nuclear polarization (DNP) using frequency swept pulses at 94 GHz which optimize the polarization transfer efficiency. Accordingly, an enhancement ℇ∼496 was observed using 10mM trityl-OX063 as the polarizing agent in a standard d8-glycerol:D2O:H2O :: 6:3:1 glassing matrix…
Tao Cao, Mingchen Liu, Chang Xu, Jikun Yan + 5 more
'Shaozhen Liu' 'Hao Peng' 'Jiahui Peng' 'Alexei V. Sokolov'] Optimization of laser output parameters vs. f-to-2f beating signals can be mutually contradicting, when an octave-spanning supercontinuum is employed for f-to-2f measurements. We show that resonant dispersive waves will solve this issue, thanks to their…
Mikhail Buyalo, Alexey Gubenko, Sergey Mikhrin, Vladimir Mikhrin + 2 more
'Alexey R. Kovsh' 'Ashok V. Krishnamoorthy'] We report a continuous-wave, O-band quantum-dot semiconductor comb laser for WDM optical interconnects exhibiting a 2.2 THz optical bandwidth with up to 89 comb wavelengths spaced at 25 GHz, over 30% peak ex-facet electrical-to-optical power conversion efficiency, up to 270…
E. J. Daw, I. J. Hollows, Elliot L. Jones, R. Kennedy + 4 more
'T. B. Edo' 'M. Fays' 'L. Sun'] We present a novel adaptive filtering approach to the dynamic characterisation of waves of varying frequency and amplitude embedded in arbitrary noise backgrounds. This method, known as IWAVEa , possesses critical advantages over conventional techniques making it a useful new tool in the…
H. Schmickler
Depending on the application people use time-domain or frequency-domain signals in order to measure or describe processes. First we will look at the definition of these terms, produce some mathematical background and then apply the tools to measurements made in the accelerator domain. We will first look at signals…