Results 21 to 30 of about 2,572,860 (288)

Redshift Weights for Baryon Acoustic Oscillations : Application to Mock Galaxy Catalogs [PDF]

, 2016
Large redshift surveys capable of measuring the Baryon Acoustic Oscillation (BAO) signal have proven to be an effective way of measuring the distance-redshift relation in cosmology. Building off the work in Zhu et al.
Padmanabhan, Nikhil, Ross, Ashley J., White, Martin, Zhao, Gongbo, Zhu, Fangzhou   +4 more
core   +2 more sources

Enhancing Multi-Distance Phase Retrieval via Unequal Interval Measurements

Photonics, 2021
In the conventional methods of multi-distance phase retrieval, the diffraction intensity patterns are recorded at equal intervals, which can induce slow convergence or stagnation in the subsequent reconstruction process.
Cheng Xu, Wei Yuan, Axiu Cao, Li Xue, Qiling Deng, Hui Pang, Yongqi Fu   +6 more
doaj   +1 more source

Aircraft positioning using multiple distance measurements and spline prediction

Aviation, 2022
During the crucial phases of take-off, initial climb, approach, and landing where aircraft are close to the ground, Global Navigation Satellite Systems (GNSS) signal strength may not be sufficient to guarantee safe operation, especially in the presence ...
Ivan Ostroumov, Karen Marais, Nataliia Kuzmenko   +2 more
doaj   +1 more source

The distance to the Fornax Dwarf Spheroidal Galaxy [PDF]

, 2007
A large multicolour, wide-field photometric database of the Fornax dwarf spheroidal galaxy has been analysed using three different methods to provide revised distance estimates based on stellar populations in different age intervals.
Aaronson, Aaronson, Azzopardi, Battaglia, Bellazzini, Bellazzini, Bersier, Bersier, Buonanno, Buonanno, Cacciari, Carretta, Carretta, Cole, Da Costa, Demers, E. V. Held, Ferraro, Ferraro, Girardi, Girardi, Greco, Greco, Gullieuszik, I. Saviane, L. Rizzi, Landolt, Lee, M. Gullieuszik, Makarov, Méndez, Paczynski, Pietrzyński, Pietrzyński, Pont, R. B. Tully, Rizzi, Rizzi, Rocha-Pinto, Rocha-Pinto, Sakai, Saviane, Schlegel, Stanek, Stetson, Stetson, Stone, Tolstoy, Tolstoy, Udalski, Udalski, Udalski, Udalski, Udalski, Valdes, Zinn   +55 more
core   +1 more source

Kompariranje in kalibriranje elektronskih tahimetrov : Comparison and Calibration of Electronic Distance Meters [PDF]

Geodetski Vestnik, 2003
All measuring instruments are subject to errors. Due to their characteristics random errors cannot be influenced and with instrument calibration they cannot be eliminated.
Florjan Vodopivec, Dušan Kogoj
doaj  

Site Selective and Efficient Spin Labeling of Proteins with a Maleimide-Functionalized Trityl Radical for Pulsed Dipolar EPR Spectroscopy

Molecules, 2019
Pulsed dipolar electron paramagnetic resonance spectroscopy (PDS) in combination with site-directed spin labeling (SDSL) of proteins and oligonucleotides is a powerful tool in structural biology.
J. Jacques Jassoy, Caspar A. Heubach, Tobias Hett, Frédéric Bernhard, Florian R. Haege, Gregor Hagelueken, Olav Schiemann   +6 more
doaj   +1 more source

A Thorough Investigation of Distance and Age of the Pulsar Wind Nebula 3C58 [PDF]

, 2013
A growing number of researchers present evidence that the pulsar wind nebula 3C58 is much older than predicted by its proposed connection to the historical supernova of A.D. 1181. There is also a great diversity of arguments.
Kothes, Roland
core   +1 more source

Normal Distance Measurements Between the Origins of the Major Branches of the Abdominal Aorta on Computed Tomography Angiography in Children

Namık Kemal Tıp Dergisi, 2022
Aim:The aim of the present study was to determine the normal distances between the origins of the major branches of the abdominal aorta, and their distances to the aorta at the diaphragmatic region and iliac bifurcation on multidetector computed ...
Edis ÇOLAK
doaj   +1 more source

The Influence of a Photometric Distance on Luminance Measurements

Energies, 2023
Luminance measurements are the least frequent of all photometric measurements. This article characterizes and systematizes the various methods of luminance measurement.
Dariusz Czyżewski
doaj   +1 more source

The Use of Gamma-ray Bursts as Direction and Time Markers in SETI Strategies [PDF]

, 1999
When transmitting a signal over a large distance it is more efficient to send a brief beamed signal than a continuous omni-directional transmission but this requires that the receiver knows where and when to look for the transmission.
Barthelmy S. D., Gehrels N., Gruber G. M., McLaughlin W. I., Pace G. W., Perryman M. A. C., Robin H. D. Corbet, Siebrand W. J., Smith D. A., Tang T. B., Tang T. B.   +10 more
core   +3 more sources