Results 61 to 70 of about 140,620 (283)

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

FEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

New Limits on Radio Emission from X-ray Dim Isolated Neutron Stars [PDF]

, 2009
We have carried out a search for radio emission at 820 MHz from six X-ray dim isolated neutron stars with the Robert C. Byrd Green Bank Radio Telescope.
A. Possenti, Aguilera, Bracewell, Burns, Camilo, Cordes, Cordes, Cordes, D. R. Lorimer, Evans, Faucher-Giguere, Gonzalez, Gotthelf, Haberl, Haberl, Hankins, Haslam, Ibrahim, Johnson, Kaplan, Kaplan, Kaplan, Kaplan, Kaplan, Kaplan, Kaplan, Kaplan, Kaspi, Kramer, Kulkarni, Lorimer, Lyne, M. A. McLaughlin, M. Burgay, McLaughlin, McLaughlin, McLaughlin, McLaughlin, Motch, Motch, Page, Pivovaroff, Popov, R. Turolla, Radhakrishnan, Ransom, Rutledge, S. B. Popov, S. Zane, Schwope, Tiengo, V. I. Kondratiev, van Kerkwijk, van Kerkwijk, Voges, Vranesevic, Walter, Weltevrede, Zane, Zane   +59 more
core   +3 more sources

Molecular dynamics simulations of positively selected codons in FcγRI reveal novel biochemical binding properties

FEBS Open Bio, EarlyView.
Evolutionary analysis across 32 placental mammals identified positive selection at residues H148 and W149 in the immune receptor FcγR1. Ancestral reconstruction combined with molecular dynamics simulations reveals how these mutations may influence receptor structure and dynamics, providing insight into the evolution of antibody recognition and immune ...
David A. Young, Omar Arias‐Gaguancela, Fiona Gibson, Morgan Grainger, Jodie Score, Amit Nathubhai, Mauricio Cafiero, Lee Richard Machado   +7 more
wiley   +1 more source

An Extremely Active Repeating Fast Radio Burst Source in a Likely Nonmagneto-ionic Environment

The Astrophysical Journal
Fast radio bursts (FRBs) are bright radio bursts originating at cosmological distances. Only three repeating FRBs FRB 20121102A, FRB 20190520B, and FRB 20201124A among ∼60 known repeating FRBs have circular polarization.
Yi Feng, Di Li, Yong-Kun Zhang, Chao-Wei Tsai, Yuanhong Qu, Wei-Yang Wang, Yuan-Pei Yang, Pei Wang, Dengke Zhou, Jiarui Niu, Chenchen Miao, Mao Yuan, Jiaying Xu, Ryan S. Lynch, William Paul Armentrout, Brenne Gregory, Lingqi Meng, Shen Wang, Xianglei Chen, Shi Dai, Chen-Hui Niu, Mengyao Xue, Ju-Mei Yao, Bing Zhang, Junshuo Zhang, Weiwei Zhu, Jintao Xie, Yuhao Zhu   +27 more
doaj   +1 more source

No detectable radio emission from the magnetar-like pulsar in Kes 75 [PDF]

, 2008
The rotation-powered pulsar PSR J1846-0258 in the supernova remnant Kes 75 was recently shown to have exhibited magnetar-like X-ray bursts in mid-2006.
Anne M. Archibald, Haslam C. G. T., Mardia K. V., Margaret A. Livingstone, Maura A. McLaughlin, Melatos A., Ransom S. M., Victoria M. Kaspi   +7 more
core   +3 more sources

Directed evolution of enzymes at the crossroads of tradition and innovation

FEBS Open Bio, EarlyView.
An iterative cycle of data‐driven enzyme optimization comprising four stages: genetic diversification of a template enzyme, expression of protein variants, high‐throughput evaluation, and machine‐learning‐guided redesign of the next variant library.
Maria Tomkova, Andrej Mirossay, Erik Sedlak   +2 more
wiley   +1 more source

A Comprehensive Study of the Energy and Redshift Distributions of the Fast Radio Burst Population Based on the First CHIME/FRB Catalog

The Astrophysical Journal
Fast radio bursts (FRBs) are brief, high-energy bursts of radio waves from extragalactic sources, and their origin remains an open question. In this paper, we perform a comprehensive analysis of the FRB population using the first CHIME/FRB catalog ...
Qing-Zhen Lei, Xin-Zhe Wang, Can-Min Deng   +2 more
doaj   +1 more source

LOFAR, a new low frequency radio telescope

, 2003
LOFAR, the Low Frequency Array, is a large radio telescope consisting of approximately 100 soccer-field sized antenna stations spread over a region of 400 km in diameter. It will operate at frequencies from ~10 to 240 MHz, with a resolution at 240 MHz of
Barthelmann, Carilli, Carilli, Cohen, De Breuck, Enßlin, Falcke, Huub Röttgering   +7 more
core   +2 more sources

An optimal method for scheduling observations of large sky error regions for finding optical counterparts to transients [PDF]

, 2016
The discovery and subsequent study of optical counterparts to transient sources is crucial for their complete astrophysical understanding. Various gamma ray burst (GRB) detectors, and more notably the ground--based gravitational wave detectors, typically
Bhalerao, Varun, Bose, Sukanta, Gadre, Bhooshan, Rana, Javed, Singhal, Akshat   +4 more
core   +2 more sources

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

International Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam, Anthony Siming Chen, Guido Herrmann   +2 more
wiley   +1 more source