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An extension of the traditional modulation transfer function (MTF), the detective MTF, is proposed for the evaluation of the resolution of X-ray imaging detectors with non-uniform efficiency on the scale of individual detector elements. The…

Instrumentation and Detectors · Physics 2008-02-03 D. J. Miller , A. Papanestis

The ntCT nano tomography system is a geometrically magnifying X-ray microscopy system integrating the recent Excillum NanoTube nano-focus X-ray source and a CdTe photon counting detector from Dectris. The system's modulation transfer…

Instrumentation and Detectors · Physics 2021-02-01 Jonas Graetz , Dominik Müller , Andreas Balles , Christian Fella

Inferring brain connectivity and structure \textit{in-vivo} requires accurate estimation of the orientation distribution function (ODF), which encodes key local tissue properties. However, estimating the ODF from diffusion MRI (dMRI)…

Image and Video Processing · Electrical Eng. & Systems 2024-02-07 William Consagra , Lipeng Ning , Yogesh Rathi

Using first-principles calculations based on density functional theory (DFT), we investigate the exchange interaction between a magnetic tip and a magnetic sample which is detected in magnetic exchange force microscopy (MExFM) and also…

Materials Science · Physics 2009-11-13 C. Lazo , V. Caciuc H. Hoelscher , S. Heinze

Measuring task relatedness and mitigating negative transfer remain a critical open challenge in Multitask Learning (MTL). This work extends data attribution -- which quantifies the influence of individual training data points on model…

Machine Learning · Computer Science 2025-05-28 Yiwen Tu , Ziqi Liu , Jiaqi W. Ma , Weijing Tang

Accurate and reliable identification of the relative transfer functions (RTFs) between microphones with respect to a desired source is an essential component in the design of microphone array beamformers, specifically when applying the…

Audio and Speech Processing · Electrical Eng. & Systems 2024-12-19 Daniel Levi , Amit Sofer , Sharon Gannot

In gamma ray astronomy muon events have a distinct feature of casting ring-like images on the sensor plane, thus forming a well known signal class for Cherenkov telescopes. These ring-like images can then be used to deduce the optical point…

Instrumentation and Methods for Astrophysics · Physics 2020-01-22 Laurits Tani

We propose a natural way to generalize relative transfer functions (RTFs) to more than one source. We first prove that such a generalization is not possible using a single multichannel spectro-temporal observation, regardless of the number…

Sound · Computer Science 2015-07-02 Antoine Deleforge , Sharon Gannot , Walter Kellermann

The ability to form images through hair-thin optical fibres promises to open up new applications from biomedical imaging to industrial inspection. Unfortunately, deployment has been limited because small changes in mechanical deformation…

Machine Learning Force Fields (MLFFs) are a promising alternative to expensive ab initio quantum mechanical molecular simulations. Given the diversity of chemical spaces that are of interest and the cost of generating new data, it is…

Machine Learning · Computer Science 2025-05-30 Tobias Kreiman , Aditi S. Krishnapriyan

We study the influence of the assumption behind the use of the inverse Tully-Fisher relation: that there should be no observational cutoffs in the TF parameter log(V_M). It is noted how lower and upper cutoffs would be seen in a log(H_0)…

Astrophysics · Physics 2007-05-23 P. Teerikorpi , T. Ekholm , M. O. Hanski , G. Theureau

The Tully-Fisher relation (TFR) is one of the most important and widely used empirical correlations in extragalactic astronomy. Apart from its importance as a secondary distance indicator, the TFR relation serves as a test for galaxy…

A learning-based method for estimating the magnitude distribution of sound fields from spatially sparse measurements is proposed. Estimating the magnitude distribution of acoustic transfer function (ATF) is useful when phase measurements…

Sound · Computer Science 2025-06-23 Shoichi Koyama , Kenji Ishizuka

In the present work, we report on the in situ magnetic force microscopy (MFM) study of the magnetization reversal in two-dimensional arrays of ferromagnetic Ni80Fe20 and Co55Fe45 nanowires(NW) with different diameters (40, 50, 70 and 100…

Materials Science · Physics 2013-12-03 M. R. Tabasum , F. Zighem , J. De La Torre Medina , A. Encinas , L. Piraux , B. Nysten

Using a magnetic resonance force microscope (MRFM), the power emitted by a spin transfer nano-oscillator consisting of a normally magnetized Py$|$Cu$|$Py circular nanopillar is measured both in the autonomous and forced regimes. From the…

Materials Science · Physics 2013-02-20 A. Hamadeh , Grégoire De Loubens , V. V. Naletov , J. Grollier , Ch. Ulysse , V. Cros , O. Klein

Determining sensor parameters is a prerequisite for quantitative force measurement. Here we report a direct, high-precision calibration method for quartz tuning fork(TF) sensors that are popular in the feld of nanomechanical measurement. In…

Materials Science · Physics 2025-06-27 Lifeng Hao , Qi Wang , Ping Peng , Zhenxing Cao , Weicheng Jiao , Fan Yang , Wenbo Liu , Rongguo Wang , Xiaodong He

In large-scale regression problems, random Fourier features (RFFs) have significantly enhanced the computational scalability and flexibility of Gaussian processes (GPs) by defining kernels through their spectral density, from which a finite…

Machine Learning · Computer Science 2024-06-05 Houston Warren , Rafael Oliveira , Fabio Ramos

Transmission matrix (TM) linearly maps the incident and transmitted complex fields, and has been used widely due to its ability to characterize scattering media. It is computationally demanding to reconstruct the TM from intensity images…

Optics · Physics 2024-01-05 Jingshan Zhong , Zhong Wen , Quanzhi Li , Qilin Deng , Qing Yang

The measurement of the Transmission Matrix (TM) of a scattering medium is of great interest for imaging. It can be acquired directly by interferometry using an internal reference wavefront. Unfortunately, internal reference fields are…

Optics · Physics 2019-04-25 Matthias Hofer , Sophie Brasselet

We use a 1.0-um-wide patterned Cu wire with an integrated nanomagnetic tip to measure the statistical nuclear polarization of 19F in CaF2 by magnetic resonance force microscopy (MRFM). With less than 350 uW of dissipated power, we achieve…

Other Condensed Matter · Physics 2007-06-27 M. Poggio , C. L. Degen , C. T. Rettner , H. J. Mamin , D. Rugar