Results 291 to 300 of about 73,293 (324)

Room‐Temperature Mid‐Infrared Detection Using Metasurface‐Absorber‐Integrated Phononic Crystal Oscillator

Laser &Photonics Reviews, EarlyView.
Room‐temperature mid‐infrared (MIR) detectors are demonstrated using lithium niobate surface acoustic wave phononic crystal oscillators integrated with metasurface absorbers. The devices exhibit rapid thermal response and simplified fabrication compared to suspended resonators.
Zichen Xi, Zengyu Cen, Dongyao Wang, Joseph G. Thomas, Bernadeta R. Srijanto, Ivan I. Kravchenko, Jiawei Zuo, Honghu Liu, Jun Ji, Yizheng Zhu, Yu Yao, Linbo Shao   +11 more
wiley   +1 more source

Low‐Frequency Raman Spectroscopy of Polymers

Macromolecular Chemistry and Physics, EarlyView.
Recent advances have made low‐frequency Raman spectroscopy accessible to the wider scientific community. This review discusses how low‐frequency Raman is particularly useful for researchers investigating polymers because the technique can help determine both the local and long‐range structure of materials, their thermodynamic properties, and their ...
Kayla A. Bensley, Robert V. Chimenti, Samuel E. Lofland   +2 more
wiley   +1 more source

Process Dependent Structural Evolution of Poly(Ether‐Ketone‐Ketone) (PEKK) During Pyrolysis in Carbon Fiber Composites

Macromolecular Chemistry and Physics, EarlyView.
This study presents insight into the structural evoluation of PEKK during pyrolysis in carbon fiber composite processing. Upon applying controlled thermal schedules, preservation of crystal structures and formation of crosslinks in the PEKK matrix prior to carbonization are mutually exclusive phenomena and can ultimately influence pre‐graphitic order ...
Matthew S. Schwenger, Robert V. Chimenti, James A. Newell, Francis M. Haas, Joseph F. Stanzione III   +4 more
wiley   +1 more source

A small and vigorous black hole in the early Universe. [PDF]

Nature
Maiolino R, Scholtz J, Witstok J, Carniani S, D'Eugenio F, de Graaff A, Übler H, Tacchella S, Curtis-Lake E, Arribas S, Bunker A, Charlot S, Chevallard J, Curti M, Looser TJ, Maseda MV, Rawle TD, Rodríguez Del Pino B, Willott CJ, Egami E, Eisenstein DJ, Hainline KN, Robertson B, Williams CC, Willmer CNA, Baker WM, Boyett K, DeCoursey C, Fabian AC, Helton JM, Ji Z, Jones GC, Kumari N, Laporte N, Nelson EJ, Perna M, Sandles L, Shivaei I, Sun F.   +38 more
europepmc   +1 more source

Application of Variable Step‐Size Hybrid Methods for Solving Third‐Order Lane‐Emden Equations

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT This manuscript introduces a pair of variable step‐size hybrid methods (PVSHM) to efficiently solve third‐order initial value problems of Lane‐Emden‐type equations (LETE). These equations are extensively used across various disciplines, including chemical engineering, fluid mechanics, physics, and astrophysics, to model a wide range of real ...
Mufutau Ajani Rufai, Thanh Tran, Bruno Carpentieri, Higinio Ramos   +3 more
wiley   +1 more source

Quantitative abdominal sodium MRI combined with 32‐channel proton pTx MRI at 7 Tesla in a large field‐of‐view

Magnetic Resonance in Medicine, EarlyView.
Abstract Purpose To combine large field‐of‐view abdominal 1H$$ {}^1\mathrm{H} $$ and quantitative sodium ( 23Na$$ {}^{23}\mathrm{Na} $$) MRI in the same position at 7 T to enable the quantification of the tissue sodium concentration via 23Na$$ {}^{23}\mathrm{Na} $$ MRI and the anatomical assignment in 1H$$ {}^1\mathrm{H} $$ images without repositioning
Anna K. Scheipers, Johannes A. Grimm, Jana Losch, Stephan Orzada, Thomas M. Fiedler, Armin M. Nagel, Sebastian Schmitter, Mark E. Ladd, Tanja Platt   +8 more
wiley   +1 more source

Synchrotron intensity gradient revealing magnetic fields in galaxy clusters. [PDF]

Nat Commun
Hu Y, Stuardi C, Lazarian A, Brunetti G, Bonafede A, Ho KW.   +5 more
europepmc   +1 more source

Feasibility of strong diffusion encoding and fast readout using a plug‐and‐play head gradient insert at 7 T

Magnetic Resonance in Medicine, EarlyView.
Purpose Diffusion weighting is achieved by the application of external field gradients typically for tens of milliseconds, during which the signal also substantially decays due to inherent T2 relaxation. Employing strong gradients will shorten the echo time (TE) and increase the signal‐to‐noise ratio.
G. C. Arends, E. Versteeg, A. De Luca, F. Marc, T. H. M. Roos, D. W. J. Klomp, M. Froeling, J. C. W. Siero, C. M. W. Tax   +8 more
wiley   +1 more source

Identification of a turnover in the initial mass function of a young stellar cluster down to 0.5 MJ

De Furio M, Meyer M, Greene T, Hodapp K, Johnstone D, Leisenring J, Rieke M, Robberto M, Roellig T, Cugno G, Fiorellino E, Manara C, Raileanu R, Terwisga Sv.   +13 more
europepmc   +1 more source