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The photoluminescence center D_{II} is a persistent intrinsic defect which is common in all SiC polytypes. Its fingerprints are the characteristic phonon replicas in luminescence spectra. We perform ab-initio calculations of vibrational…

Materials Science · Physics 2007-05-23 Alexander Mattausch , Michel Bockstedte , Oleg Pankratov

Segmentation and measurement of cardiac chambers is critical in cardiac ultrasound but is laborious and poorly reproducible. Neural networks can assist, but supervised approaches require the same laborious manual annotations. We built a…

Image and Video Processing · Electrical Eng. & Systems 2026-02-24 Danielle L. Ferreira , Connor Lau , Zaynaf Salaymang , Rima Arnaout

This paper provides an initial investigation on the application of convolutional neural networks (CNNs) for fingerprint-based positioning using measured massive MIMO channels. When represented in appropriate domains, massive MIMO channels…

Machine Learning · Statistics 2017-08-22 Joao Vieira , Erik Leitinger , Muris Sarajlic , Xuhong Li , Fredrik Tufvesson

In biological and medical research, scientists now routinely acquire microscopy images of hundreds of morphologically heterogeneous organoids and are then faced with the task of finding patterns in the image collection, i.e., subsets of…

Computer Vision and Pattern Recognition · Computer Science 2024-03-21 Jannik Presberger , Rashmiparvathi Keshara , David Stein , Yung Hae Kim , Anne Grapin-Botton , Bjoern Andres

Semantic segmentation is an important task in computer vision that is often tackled with convolutional neural networks (CNNs). A CNN learns to produce pixel-level predictions through training on pairs of images and their corresponding…

Image and Video Processing · Electrical Eng. & Systems 2022-03-22 Tianyu Ma , Benjamin C. Lee , Mert R. Sabuncu

This paper presents a simple but performant semi-supervised semantic segmentation approach, called CorrMatch. Previous approaches mostly employ complicated training strategies to leverage unlabeled data but overlook the role of correlation…

Computer Vision and Pattern Recognition · Computer Science 2023-12-12 Boyuan Sun , Yuqi Yang , Le Zhang , Ming-Ming Cheng , Qibin Hou

We analysed XMM-{\it Newton} EPIC data for 53 galaxy clusters. Through 2D spectral maps, we provide the most detailed and extended view of the spatial distribution of temperature (kT), pressure (P), entropy (S) and metallicity (Z) of galaxy…

Cosmology and Nongalactic Astrophysics · Physics 2019-02-07 T. F. Laganá , F. Durret , P. A. A. Lopes

We present a complete theory of bicircular high-order-harmonic emission from N-fold rotationally symmetric molecules. Using a rotating frame of reference we predict the complete structure of the high-order-harmonic spectra for arbitrary…

Atomic Physics · Physics 2016-09-26 Daniel M. Reich , Lars Bojer Madsen

We have used the Stern-Gerlach deflection technique to study magnetism in chromium clusters of 20-133 atoms. Between 60 K and 100 K, we observe that these clusters have large magnetic moments and respond superparamagnetically to applied…

Atomic and Molecular Clusters · Physics 2009-11-13 F. W. Payne , Wei Jiang , L. A. Bloomfield

Pair-correlated fermionic atoms are created through dissociation of weakly bound molecules near a magnetic-field Feshbach resonance. We show that correlations between atoms in different spin states can be detected using the atom shot noise…

Other Condensed Matter · Physics 2009-11-11 M. Greiner , C. A. Regal , J. T. Stewart , D. S. Jin

Structural magnetic resonance imaging (MRI) has been widely utilized for analysis and diagnosis of brain diseases. Automatic segmentation of brain tumors is a challenging task for computer-aided diagnosis due to low-tissue contrast in the…

Image and Video Processing · Electrical Eng. & Systems 2020-11-22 Mohammad Hamghalam , Baiying Lei , Tianfu Wang

In this work we report ab initio calculations for the $H_2^+$ molecule interacting with ultrashort intense laser pulses. We analyse several observables that can, in principle, be available experimentally, in order to get a deeper…

Atomic Physics · Physics 2017-05-25 R. E. F. Silva

Fluid dispersed two-dimensional (2D) composite materials with dynamically tunable functional properties have recently emerged as a novel highly promising class of optoelectronic materials, opening up new routes not only for the emerging…

Spin complexes comprising the nitrogen-vacancy (NV) center and neighboring spins are being considered as a building block for a new generation of spintronic and quantum information processing devices. Because assembling identical spin…

Mesoscale and Nanoscale Physics · Physics 2013-05-08 Abdelghani Laraoui , Florian Dolde , Christian Burk , Friedemann Reinhard , Jörg Wrachtrup , Carlos A. Meriles

We have developed a coherent Raman imaging platform using broadband coherent anti-Stokes Raman scattering (BCARS) that provides an unprecedented combination of speed, sensitivity, and spectral breadth. The system utilizes a unique…

The structure formation of the dense interstellar material and the fragmentation of clumps into cores is a fundamental step to understand how stars and stellar clusters form. We aim to establish a statistical view of clump fragmentation at…

Astrophysics of Galaxies · Physics 2019-10-30 Yuxin Lin , Timea Csengeri , Friedrich Wyrowski , James S. Urquhart , Frederic Schuller , Axel Weiss , Karl M. Menten

We applied the newly developed rose diagram overlay method to detect the layered structure of 88 nearby open clusters ($\leq$500~pc) on the three projections after the distance correction of their member stars, based on the catalog in…

Astrophysics of Galaxies · Physics 2023-05-18 Qingshun Hu , Yu Zhang , Ali Esamdin , Hong Wang , Mingfeng Qin

In this paper, we have studied electron correlation and Gaunt interaction effects in ionization potentials (IPs) and hyperfine constants A of 2p$^2P_{1/2}$ and 2p$^2P_{3/2}$ states along with the fine structure splitting (FSS) between them…

Atomic Physics · Physics 2011-11-23 Narendra Nath Dutta , Sonjoy Majumder

The Microstrip Silicon Detector (MSD) is one of the subsystems of the FragmentatiOn Of Target (FOOT) experiment whose goal is to measure double differential nuclear fragmentation cross sections for applications in particle therapy and…

Instrumentation and Detectors · Physics 2026-03-23 S. Mazzolani , I. Mattei , L. Servoli

We study the packing fraction of clusters in free-falling streams of spherical and irregularly shaped particles using flash X-ray radiography. The estimated packing fraction of clusters is low enough to correspond to coordination numbers…

Soft Condensed Matter · Physics 2021-03-31 Yuuya Nagaashi , Akiko M. Nakamura , Sunao Hasegawa , Koji Wada
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