Results 1 to 10 of about 9,228 (164)

Time-resolved 3D imaging opportunities with XMPI at ForMAX. [PDF]

J Synchrotron Radiat
The first implementation of X‐ray multi‐projection imaging (XMPI) at the ForMAX beamline (MAX IV) enables the acquisition of multiple projections simultaneously without requiring sample rotation. This approach facilitates volumetric studies of fast dynamics at frame rates of 12.5 kHz with micrometre resolution, with the potential of even higher speeds,
Rogalinski JK, Yao Z, Yao Z, Zhang Y, Hu Z, Gordeyeva K, Rosén T, Söderberg D, Mazzolari A, da Silva J, Haghighat V, McDonald SA, Nygård K, Asimakopoulou EM, Villanueva-Perez P.   +14 more
europepmc   +2 more sources

Selective learning for sensing using shift-invariant spectrally stable undersampled networks [PDF]

Scientific Reports
The amount of data collected for sensing tasks in scientific computing is based on the Shannon-Nyquist sampling theorem proposed in the 1940s. Sensor data generation will surpass 73 trillion GB by 2025 as we increase the high-fidelity digitization of the
Ankur Verma, Ayush Goyal, Sanjay Sarma, Soundar Kumara   +3 more
doaj   +2 more sources

X-ray data reconstruction from incomplete data sampling. [PDF]

J Appl Crystallogr
A reconstruction procedure for patterns with incomplete information is reported. It is based on a modified Papoulis–Gerchberg algorithm. The modifications were introduced to guide the reconstruction procedure. The reconstruction algorithm could prove useful in specific experimental geometry setups.For specific setups, a diffraction pattern can contain ...
Medina KG, Rams EE, Neder RB.
europepmc   +2 more sources

Active control of noise radiated from a long cylinder: Can the Nyquist limitation be broken? [PDF]

Heliyon
In the present paper, we consider active control of noise propagating from a long cylinder. For that purpose control sources are distributed on the external surface of the cylinder.
N. Hu, S. Utyuzhnikov
doaj   +2 more sources

Navigating the Data Processing Maze: A Systematic Review of Jump Height Calculations Using Force Platforms. [PDF]

Eur J Sport Sci
ABSTRACT Vertical jump height estimates the ability to oppose gravity and lower body neuromuscular performance in athletes and various clinical populations. The use of force platforms for measuring jump height is increasingly popular due to technological advancements and the equipment's relative ease of use in various settings.
Eythorsdottir I, Gløersen Ø, Rice H, Werkhausen A, Ettema G, Solberg P, Paulsen G.   +6 more
europepmc   +2 more sources

Arterial Pulse Wave Velocity Signal Reconstruction Using Low Sampling Rates [PDF]

Biosensors
Pulse Wave Velocity (PWV) analysis is valuable for assessing arterial stiffness and cardiovascular health and potentially for estimating blood pressure cufflessly. However, conventional PWV analysis from two transducers spaced closely poses challenges in
Sungcheol Hong, Gerard Coté
doaj   +2 more sources

Symmetric Sampling and the Discrete Laws of Physics (1) Refuting the Classical Shannon-Nyquist Sampling Theorem [PDF]

Heel Mv.
europepmc   +2 more sources

How to generate accurate continuous thermal regimes from sparse but regular temperature measurements

Methods in Ecology and Evolution, 2023
In ecology, there is an emerging emphasis on the importance of capturing temperature variation at relevant scales. Temperature fluctuates continuously in nature but is sampled at discrete time points, so how often should ecologists measure temperature to
Loke vonSchmalensee
doaj   +1 more source

Compressive narrowband interference detection and parameter estimation in direct sequence spread spectrum communication

IET Signal Processing, 2022
The Shannon‐Nyquist sampling theorem that is based on narrowband interference (NBI) detection and parameter estimation methods in direct sequence spread spectrum (DSSS) communication is limited by the high sampling rate.
Zengkai Shi, Yongshun Zhang, Zhaoyong Qian, Xiaoshuang Sun, Xiangtai Ma   +4 more
doaj   +1 more source

Accelerometer sampling requirements for animal behaviour classification and estimation of energy expenditure

Animal Biotelemetry, 2023
Background Biologgers have contributed greatly to studies of animal movement, behaviours and physiology. Accelerometers, among the various on-board sensors of biologgers, have mainly been used for animal behaviour classification and energy expenditure ...
Hui Yu, Florian T. Muijres, Jan Severin te Lindert, Anders Hedenström, Per Henningsson   +4 more
doaj   +1 more source