Results 81 to 90 of about 17,110 (224)

Material Strategies for Stimulation and Recording in Neural Biocomputing Platforms

Advanced Electronic Materials, Volume 12, Issue 14, 20 July 2026.
Material strategies enabling stimulation and recording are central to neural biocomputing systems. This review examines how electronic materials govern the encoding of inputs and decoding of outputs in living neural networks. Advances in electrical, optical, and multimodal interfaces highlight emerging design principles for biocomputing platforms ...
Sehong Kang, Junggeon Park, Aryaman Joshi, Rakid Haque, Gyu Weon Hwang, Hyunjoon Kong   +5 more
wiley   +1 more source

AGN evolution, clustering and the X-ray background [PDF]

, 1991
We combine optical, X-ray (Einstein and ROSAT) and infrared (IRAS) data to investigate the evolution and spatial distribution of AGN with particular emphasis on the implications for the origin of the diffuse X-ray background.
Georgantopoulos, Ioannis
core  

Feasibility Study for Application of Digitized Henize Mt. Wilson Michigan Southern Sky Hα$$ \boldsymbol{\alpha} $$ Survey Low‐Dispersive Spectral Plates for Searches for Anomalous and Highly Redshifted Objects

Astronomische Nachrichten, Volume 347, Issue 6, July 2026.
ABSTRACT The goal of this study is to confirm the feasibility of the use of digitized low dispersive MtWilson Michigan Southern Sky Hα$$ \alpha $$ survey astronomical photographic plates for modern astrophysical research. The detection of highly redshifted objects, such as early galaxies and quasars, is fundamental to understanding the universe's ...
Tauseef Ahmad Zafar, René Hudec, Marta Mara Merono Vidagany, Fehmi Mejri   +3 more
wiley   +1 more source

The Jets in Micro-Quasars and Quasars: A Comparison [PDF]

Highlights of Astronomy, 2005
AbstractThe discovery of relativistic jets in radio emitting X-ray binaries in our own galaxy has led to the term ‘microquasar’ being coined for these objects. In this paper the properties of microquasars are compared with those of quasars and radio galaxies, with the aim of trying to see how the similarities and differences can inform us about the ...
openaire   +1 more source

The Physical Properties of Low-redshift FeLoBAL Quasars. IV. Optical–Near-IR Spectral Energy Distributions and Near-IR Variability Properties

The Astrophysical Journal
We present the optical–near-infrared spectral energy distributions (SED) and near-infrared variability properties of 30 low-redshift iron low-ionization Broad Absorption Line quasars (FeLoBALQs) and matched samples of LoBALQs and unabsorbed quasars ...
Karen M. Leighly, Hyunseop Choi, Michael Eracleous, Donald M. Terndrup, Sarah C. Gallagher, Gordon T. Richards   +5 more
doaj   +1 more source

Complement Factor H‐Based Therapeutics: A Comprehensive Overview

European Journal of Immunology, Volume 56, Issue 7, July 2026.
Complement factor H is a central regulator of the complement system and thus a target for therapeutic intervention. In this review, we provide an overview of past and current factor H‐based therapeutic concepts and modalities to treat complement‐mediated diseases.
Sebastiaan M. W. R. Hamers, Emmy J. Buter, Richard B. Pouw   +2 more
wiley   +1 more source

A slitless spectroscopic survey for quasars near quasars

, 2008
We present the results of the “Quasars near Quasars” (QNQ) survey, a CCD-based slitless spectroscopic survey for faint $V\la 22$ quasars at $1.7\la z\la 3.6$ on 18 $26\farcm 2\times 33\farcm 5$ fields centred on bright quasars at $2.761.7$.
F. Selman, L. Wisotzki, G. Worseck
core   +1 more source

QUASARS PROBING QUASARS. VI. EXCESS H I ABSORPTION WITHIN ONE PROPER Mpc OF z ~ 2 QUASARS [PDF]

, 2013
With close pairs of quasars at different redshifts, a background quasar sightline can be used to study a foreground quasar's environment in absorption. We use a sample of 650 projected quasar pairs to study the H I Lyα absorption transverse to luminous ...
Cantalupo, Sebastiano, Lee, Khee-Gan, Prochaska, J. Xavier, Djorgovski, S. G., Lau, Marie Wingyee, Martin, Crystal L., Bovy, Jo, Myers, Adam, Prochaska, J Xavier, Simcoe, Robert A., Ellison, Sara L, Rubin, Kate HR, Hennawi, Joseph F., Rubin, Kate H. R., Hennawi, Joseph F, Martin, Crystal L, Ellison, Sara L., Djorgovski, SG, Simcoe, Robert A   +18 more
core   +1 more source

Parsec-scale structure of quasars: dawn of the golden age?

, 2013
Half a century after their discovery, the study of quasars remains one of the most fascinating intellectual challenges in astronomy. Quasars are laboratories for everything from relativity to magnetohydrodynamics and are perhaps the best available probes
Ojha, Roopesh
core   +1 more source

Machine Learning–based Search of High-redshift Quasars

The Astrophysical Journal Supplement Series
We present a machine learning search for high-redshift (5.0 < z < 6.5) quasars using the combined photometric data from the Dark Energy Spectroscopic Instrument (DESI) Imaging Legacy Surveys and the Wide-field Infrared Survey Explorer survey.
Guangping Ye, Huanian Zhang, Qingwen Wu
doaj   +1 more source