Results 11 to 20 of about 909,701 (168)

Nonlocal Transformations for Accelerated Observers [PDF]

, 2009
According to the locality postulate of special relativity, the measurements of physical fields by accelerated observers at a given event in Minkowski spacetime are related to each other by the representations of the Lorentz group.
Mashhoon, Bahram
core   +2 more sources

OBSERVATIONS OF VARIABLE STARS WITH SMALL TELESCOPES

Odessa Astronomical Publications, 2017
No ...
I. S. Bryukhanov
doaj   +1 more source

Personalised ecology and detection functions

People and Nature, 2020
Direct interactions with nature are important for people's health, well‐being and support for pro‐nature policies. There is an urgent need better to understand the structure and dynamics of these interactions, and how they differ among individual people,
Kevin J. Gaston
doaj   +1 more source

Observers in an accelerated universe [PDF]

, 2011
If the current acceleration of our Universe is due to a cosmological constant, then a Coleman-De Luccia bubble will nucleate in our Universe. In this work, we consider that our observations could be likely in this framework, consisting in two infinite ...
A.D. Linde, B.H. Lee, D.N. Page, E. Farhi, E. Malec, J. Garriga, J. Metzger, J.E. Marsden, J.M. Heinzle, J.R. Gott, J.W. York, K. Kuchar, K. Sakai, K.M. Lee, L. Susskind, M. Bucher, P. de Bernardis et al. (Boomerang Collaboration), Prado Martín-Moruno, R. Beig, S. Ansoldi, S.J. Parke, S.R. Coleman, S.R. Coleman, S.W. Hawking, V.A. Berezin, W. Israel   +25 more
core   +3 more sources

HD 66051, an eclipsing binary hosting a highly peculiar, HgMn-related star

Scientific Reports, 2017
HD 66051 is an eclipsing system with an orbital period of about 4.75 d that exhibits out-of-eclipse variability with the same period. New multicolour photometric observations confirm the longevity of the secondary variations, which we interpret as a ...
Ewa Niemczura, Stefan Hümmerich, Fiorella Castelli, Ernst Paunzen, Klaus Bernhard, Franz-Josef Hambsch, Krzysztof Hełminiak   +6 more
doaj   +1 more source

Searches of the periods and variability type definition of new variable stars AL Ari, FM Leo, LL Aqr, V1125 Tau, V1366 Ori

Odessa Astronomical Publications, 2017
Measurements of brightness of stars 1AL Ari, FM Leo, LL Aqr, V1125 Tau, V1366 Ori opened in ”HIPPARCOS” experiment are carried out using negatives of the Odessa observatory.
A. P. Solonovich, I. V. Bryukhanov, A. S. Sernenyuta   +2 more
doaj   +1 more source

A turbidity sensor development based on NL-PI observers: Experimental application to the control of a Sinaloa’s River Spirulina maxima cultivation

Open Chemistry, 2020
This article addresses the problem of controlling the growth of microalgae originating in Mexican rivers, especially in the state of Sinaloa, Culiacan River.
Flores Gerardo, Rodriguez-Mata Abraham Efraim, Amabilis-Sosa Leonel Ernesto, Gonzalez-Huitron Victor Alejandro, Hernández-González Omar, Lopéz-Peréz Pablo Antonio   +5 more
doaj   +1 more source

Fluid observers and tilting cosmology [PDF]

, 2006
We study perfect fluid cosmological models with a constant equation of state parameter $\gamma$ in which there are two naturally defined time-like congruences, a geometrically defined geodesic congruence and a non-geodesic fluid congruence.
A A Coley, Barrow J D, Barrow J D, Barrow J D, Barrow J D, Coley A A, Coley A A, Coley A A, Coley A Hervik S Latta J, Das S Corasanuti P S Khoury J, Harnett D, Hervik S, Hervik S, Hervik S, Hervik S, Huey G Wandelt B D, Jaffe T R Hervik S Banday A J Gorski K M, Lim W C Deeley R J Wainwright J, McInnes B, Raychaudhuri A K, Rendall A D, S Hervik, Sahni V, Shikin I S, van Elst H, W C Lim, Wainwright J   +26 more
core   +3 more sources

Virtual Diagnostic Sensors Design for an Automated Guided Vehicle

Applied Sciences, 2018
In recent years, Automated Guided Vehicles (AGVs) have been playing an increasingly important role in producing industry and infrastructure and will soon arrive to other areas of human life such as the transportation of goods and people. However, several
Ralf Stetter, Marcin Witczak, Marcin Pazera   +2 more
doaj   +1 more source

Anti-slip control based on optimal slip ratio for heavy-haul locomotives

The Journal of Engineering, 2019
To solve the problem of wheelset slip and effectively exert locomotive traction, a protection method of anti-slip control with integral sliding mode based on optimal slip ratio is proposed.
Jing He, Xintian Zuo, Changfan Zhang, Songan Mao, Yunguo He   +4 more
doaj   +1 more source