Results 71 to 80 of about 52,830 (299)

Lifshitz Transition in Correlated Topological Semimetals

Advanced Science, EarlyView.
Theoretical calculations reveal that in YPtBi and GdPtBi, strong electronic correlations shift topological Dirac nodes away from the Fermi level by forming large hole pockets. This effect is sensitive to temperature and arises from interactions among 4d or 4f electrons, offering insights into Fermi surface engineering in quantum materials.
Byungkyun Kang, Myoung‐Hwan Kim, Chul Hong Park, Anderson Janotti, Eunja Kim   +4 more
wiley   +1 more source

Optimizing Structural Parameters and Layout of Fiber Positioners with the Whale Optimization Algorithm for LAMOST

The Astronomical Journal
Robotic fiber positioner (RFP) arrays are essential for multiobject spectroscopic telescopes. To improve the survey efficiency, they are densely arranged on the focal planes with overlapped patrol areas, guaranteeing full coverage and increasing the ...
Zengxiang Zhou, Jiahao Zhou, Baolong Chen, Jianping Wang, Zhigang Liu, Hongzhuan Hu, Feifan Zhang   +6 more
doaj   +1 more source

Spectroscopic Evidence of Edge‐Localized States in an Antiferromagnet Topological Insulator NdBi

Advanced Science, EarlyView.
Using spin‐polarized scanning tunneling microscopy (STM) in conjunction with quasiparticle interference, we successfully identify distinct signatures of the ferromagnetic and antiferromagnetic terminations in NdBi, a rare‐earth monopnictide exhibiting non‐trivial topology and magnetism. We demonstrate that step edges on ferromagnetic surfaces host well‐
Avior Almoalem, Rebecca Chan, Brinda Kuthanazhi, Juan Schmidt, Jose A. Moreno, Hermann Suderow, Paul Canfield, Taylor L. Hughes, Vidya Madhavan   +8 more
wiley   +1 more source

On-sky Demonstration of Second-stage Wave-front Control with a Photonic Lantern

The Astronomical Journal
Ground-based direct imaging of exoplanets at high contrast requires precise correction of atmospheric turbulence using adaptive optics (AO). The planet-to-star contrast ratio at small angular separations from the host star is often limited by non-common ...
Aditya R. Sengupta, Jordan Diaz, Matthew DeMartino, Rebecca Jensen-Clem, Sylvain Cetre, Elinor Gates, Kevin Bundy, Daren Dillon, Philip Hinz, Maïssa Salama, Nour Skaf, Olivier Guyon, Tara Crowe, Caleb Dobias, Stephen S. Eikenberry, Rodrigo Amezcua-Correa, Stephanos Yerolatsitis   +16 more
doaj   +1 more source

CosmoDM and its application to Pan-STARRS data

, 2015
The Cosmology Data Management system (CosmoDM) is an automated and flexible data management system for the processing and calibration of data from optical photometric surveys.
Desai, S., Henderson, R., Kummel, M., Mohr, J. J., Paech, K., Wetzstein, M.   +5 more
core   +1 more source

An ATP‐Mediated Antibiotic β‐Peptide Nanofiber That Kills Multidrug‐Resistant Bacteria via a Multistage Mechanism

Advanced Science, EarlyView.
The 3K‐AP system forms infinite supramolecular fibrils that undergo controlled degradation into shorter fragments upon enzymatic hydrolysis. Multitechnique imaging reveals a stepwise bacteriolytic mechanism involving bacterial entrapment, disassembly into lethal constructs, and associated extracellular vesicle release, highlighting the dynamic ...
Sohini Chakraborty, Kamal el Battioui, Dániel Molnár, Bálint Jezsó, Lejla Daruka, Tasvilla Sonallya, Tünde Juhász, Rita Hirmondó, Imola Cs. Szigyártó, Loránd Románszki, Natália Tőkési, Daniel Pinkas, Eszter Házy, Olivér Pavela, Andrea Bodor, Zoltán Varga, István Mándity, Mihály Kovács, Csaba Pál, Kata Horváti, Judit Tóth, Tamás Beke‐Somfai   +21 more
wiley   +1 more source

A Hierarchical Point-spread Function Reconstruction Method

The Astrophysical Journal
Reconstruction of the point-spread function (PSF) plays an important role in many areas of astronomy, including photometry, astrometry, galaxy morphology, and shear measurement.
Pedro Alonso, Jun Zhang, Cong Liu
doaj   +1 more source

Seedless One‐Pot Synthesis of Colloidal InAs Quantum Dots Enabling a High‐Accuracy Photoplethysmography Oximeter

Advanced Science, EarlyView.
A real‐time, non‐contact photoplethysmography (PPG) system based on InAs colloidal quantum dots (CQDs) synthesized via a seedless injection synthesis is demonstrated. The measured oxygen saturation shows considerable agreement with commercial PPG devices.
Beom Kwan Kim, Seungin Jee, Yongnam Ahn, In Suh Lee, Dongeon Kim, Seongchong Park, Yujin Jung, In‐Ho Bae, Se‐Woong Baek   +8 more
wiley   +1 more source

The Geography of Success: A Spatial Analysis of Export Intensity in the Italian Wine Industry

Agribusiness, EarlyView.
ABSTRACT This paper investigates the paradox of how Italy's fragmented, SME‐dominated wine industry achieves global export success. Moving beyond purely firm‐centric explanations, we test whether export intensity is spatially dependent, clustering geographically in regional ecosystems.
Nicolas Depetris Chauvin, Jonas Di Vita
wiley   +1 more source

A 1 bit Raw Voltage-recording System for Dedicated Observations of Transients at Low Radio Frequencies

The Astrophysical Journal Supplement Series
Recently we had reported commissioning of a prototype for pulsar observations at low radio frequencies (
Kshitij S. Bane, Indrajit V. Barve, G. V. S. Gireesh, C. Kathiravan, R. Ramesh   +4 more
doaj   +1 more source