Results 121 to 130 of about 87,664 (270)

Data Stitching for Dynamic Field Monitoring With NMR Probes

Magnetic Resonance in Medicine, Volume 95, Issue 4, Page 1944-1958, April 2026.
ABSTRACT Purpose To propose a new method for characterizing sequences with higher resolution or readout length than allowed by standard field monitoring approaches. Methods Our proposed method was devised to characterize entire readout gradients by stitching multiple segment‐specific dynamic field measurements obtained across a matched number of ...
Jinyuan Zhang, Zihao Zhang, Zhentao Zuo, Rong Xue, Yan Zhuo, Cameron Cushing, Alexander Bratch, Edward Auerbach, Andrea Grant, Jing An, Kamil Ugurbil, Xiaoping Wu   +11 more
wiley   +1 more source

Comprehensive 4D Parallel Transmission Spatial‐Spectral Pulse Design for Slab‐Selective Uniform Water‐Selective Excitation: Demonstration in the Human Brain at 7 Tesla

Magnetic Resonance in Medicine, Volume 95, Issue 4, Page 2052-2062, April 2026.
ABSTRACT Purpose To propose a new parallel transmission (pTx) spatial‐spectral (SPSP) pulse design for achieving slab‐selective uniform water‐selective excitation without unwanted out‐of‐slab fat excitation when using bipolar slab‐selective gradients to maintain a sharp slab profile.
Xin Shao, Zhe Zhang, Wen Zhong, Hua Guo, Kamil Ugurbil, Xiaoping Wu   +5 more
wiley   +1 more source

Microstructure forming mechanism of inconel 625 alloy fabricated by laser/ultra-high (UHF) induction hybrid deposition method

Journal of Materials Research and Technology
To reveal the microstructure forming mechanism of laser/ultra-high frequency (UHF) induction deposition, this paper developed a microscopic phase-field (PF) model to numerically investigate dendrite growth during solidification.
Yuhang Qiao, Rui Sun, Yong Yang, Shukun Liu, Xiaogang Wang   +4 more
doaj   +1 more source

Spin projected unrestricted Hartree-Fock ground states for harmonic quantum dots

, 2007
We report results for the ground state energies and wave functions obtained by projecting spatially unrestricted Hartree Fock states to eigenstates of the total spin and the angular momentum for harmonic quantum dots with $N\leq 12$ interacting electrons
A. Bohr, A. Szabo, B. Kramer, Chengguang Bao, F. Cavaliere, G. C. Darwin, L. P. Kouwenhoven, M. Sassetti, P. Ring, R. Cenni, S. Sasaki, U. De Giovannini   +11 more
core   +1 more source

A multideterminant assessment of mean field methods for the description of electron transfer in the weak coupling regime

, 2009
Multideterminant calculations have been performed on model systems to emphasize the role of many-body effects in the general description of charge quantization experiments. We show numerically and derive analytically that a closed-shell ansatz, the usual
A. C. Hurley, A. Szabo, J. Cornil, P. Fulde, R. Landauer, R. Stadler, S. Datta, V. Geskin   +7 more
core   +1 more source

Predation Risk Does Not Delay Breeding but Reduces Nest Survival in High‐Arctic Shorebirds

Ecology and Evolution, Volume 16, Issue 3, March 2026.
We assessed the impact of arctic foxes' predation pressure on two sympatric sandpiper species. Fox activity influenced the breeding ecology of both sandpipers, with earlier nest initiations and lower nest survival rates in areas of high fox activity. ABSTRACT Understanding predator–prey interactions is crucial for correctly answering many fundamental ...
Laura Bonnefond, David Pinaud, Loïc Bollache, Thomas Pagnon, Eric Buchel, Brigitte Sabard, Vladimir Gilg, Jérôme Moreau, Olivier Gilg   +8 more
wiley   +1 more source

UHF single-phase line acoustic wave transducers [PDF]

, 1978
M.J. Hoskins, Supriyo Datta, B.J. Hunsinger   +2 more
openalex   +1 more source

Comparative Framework for Energy Absorption Capacity of Auxetics and Open‐Cell Foams

Macromolecular Materials and Engineering, Volume 311, Issue 3, March 2026.
 . ABSTRACT The selection of the appropriate materials and structures for enhanced energy absorption is paramount in the design of protective gear, regardless of the final application. This research addresses a long‐standing academic debate regarding the effectiveness of auxetic structures in mitigating impacts relative to open‐cell foam counterparts ...
George Youssef, Celia Rufo‐Martín
wiley   +1 more source

Spatial Identification Methods and Systems for RFID Tags [PDF]

, 2013
Disertační práce je zaměřena na metody a systémy pro měření vzdálenosti a lokalizaci RFID tagů pracujících v pásmu UHF. Úvod je věnován popisu současného stavu vědeckého poznání v oblasti RFID prostorové identifikace a stručnému shrnutí problematiky ...
Povalač, Aleš
core  

Flip Angle Errors in Actual Flip Angle Imaging Using Polyvinylpyrrolidone/Water‐Based Phantoms

Magnetic Resonance in Medicine, Volume 95, Issue 3, Page 1489-1502, March 2026.
ABSTRACT Purpose The aim of this work is to report and investigate unexpected errors in actual flip angle imaging (AFI) applied to phantom fillings based on polyvinylpyrrolidone (PVP). Methods Flip angle maps of PVP/water mixtures with different PVP ratios were acquired at 3 T and 7 T using a 3D cartesian AFI. The influence of spoiling was investigated
Niklas Himburg, Max Lutz, Lorenz Mitschang, Jan Gregor Frintz, Sebastian Schmitter   +4 more
wiley   +1 more source