Results 21 to 30 of about 90,404 (262)

Unipolar Barrier Near-Infrared 2D Photodetectors for 3D Image Sensors. [PDF]

Adv Sci (Weinh)
A MoTe2/WSe2/Cl–SnSe2 unipolar barrier photodetector is demonstrated, in which the WSe2 layer effectively blocks majority‐carrier injection, yielding suppressed dark current and enhanced near‐infrared (NIR) sensing. The device achieves high detectivity, a wide linear dynamic range, and fast response under 1310 nm illumination, enabling high‐fidelity 3D
Hong JP, Kim SJ, Jang J, Lee JJ, Han SJ, Yeon E, Kim JW, Ahn J, Kim SY, Ko HW, Han S, Lee SA, Seo PH, Suh YW, Lee K, Wang G, Zheng DG, Hong S, Hahn S, Yoon SK, Park MC, Hwang DK.   +21 more
europepmc   +2 more sources

Selecting a Photometric System for Gaia: C, N, O and Alpha-Process Elements

Open Astronomy, 2003
The sensitivity of stellar spectra to C, N, O and α-process element abundances is discussed with the aim of taking this effect into account when selecting a photometric system for the Gaia orbiting observatory.
Tautvaišienė G., Edvardsson B., Bartašiūtė S.   +2 more
doaj   +1 more source

Fast CCD Photometry in the Taiwan-America Occultation Survey

Open Astronomy, 2003
We describe the efforts of the Taiwan-America Occultation Survey (TAOS) project to develop a data acquisition and analysis scheme for fast CCD imaging photometry.
Chen W. P., Zhang Z. W., King S. K., Alcock C., Byun Y. I., Cook K. H., Dave R., Giammarco J., Lee T., Lehner M., Liang C., Lissauer J., Marshall S., Pater I. de, Porrata R., Rice J., Wang A., Wang S. Y., Wen C. Y.   +18 more
doaj   +1 more source

The Observational Signatures of Cosmic Strings [PDF]

, 2009
Cosmic strings were postulated by Kibble in 1976 and, from a theoretical point of view, their existence finds support in modern superstring theories, both in compactification models and in theories with extended additional dimensions.
Riccio, Giuseppe
core   +1 more source

The Reduction of CCD Images for Stellar Photometry on the Vatt

Open Astronomy, 2003
We briefly describe a method of organizing all the star field exposures taken in a complete CCD observational run. By a “CommandLog” (to be published in J. Astron.
Janusz R., Boyle R. P., Philip A. G. Davis   +2 more
doaj   +1 more source

Parameterization of long-period eclipsing binaries

Open Astronomy, 2022
One of the important sources for independent determination of stellar masses is eclipsing binaries with components on the main sequence, and with observable spectral lines of both components.
Pakhomova Polina, Berdnikov Leonid, Kniazev Alexei, Katkov Ivan, Malkov Oleg   +4 more
doaj   +1 more source

Tiled Projector Displays Correction for Dark Scenes in Railway Simulators [PDF]

, 2011
Tiled projector displays are a common choice for training simulators, where a high resolution output image is required. They are cheap for the resolution that they can reach and can be configured in many different ways.
Félez Mindán, Jesús, Romero Rey, Gregorio, Zoido Benitez, Carlos, Maroto Ibáñez, Joaquín, C. Zoido, J. Felez, J. Maroto, G. Romero   +7 more
core   +1 more source

Overlapping Open Clusters NGC 1750 and NGC 1758 behind the Taurus Dark Clouds. II. CCD Photometry in the Vilnius System

Open Astronomy, 2003
Seven-color photometry in the Vilnius system has been obtained for 420 stars down to V = 16 mag in the area containing the overlapping open clusters NGC 1750 and NGC 1758 in Taurus.
Straižys V., Kazlauskas A., Černiauskas A., Boyle R. P., Vrba F. J., Philip A. G. Davis, Laugalys V., Černis K., Smriglio F.   +8 more
doaj   +1 more source

A New Approach to the Long-Term Activity Behavior of DM UMa

Open Astronomy, 2012
A long-term activity character of DM UMa (K0-1 IV-III), which is one of the most active members of the RS CVn type variables, is examined using the multicolor photometric observations which spread to the time interval between 1980 and 2009. In this work,
Taş G., Evren S.
doaj   +1 more source

Merging Data from Large and Small Telescopes – Good or Bad? And: How Useful is the Application of Statistical Weights to Time-Series Photometric Measurements?

Open Astronomy, 2003
I have investigated the value of the contribution of small telescopes to the success of a whole WET run. To this end, I have applied different data weighting schemes to two extreme WET test data sets. I find that weights proportional to the inverse local
Handler G.
doaj   +1 more source