Results 21 to 30 of about 1,047,569 (316)
Spiral galaxy distance indicators based on near-infrared photometry [PDF]
, 1999 We compare two methods of distance determination to spiral galaxies using optical/near-infrared (NIR) observations, the (I-K) versus M_K colour - absolute magnitude (CM) relation and the I and K-band Tully-Fisher relation (TFR). Dust-free colours and NIR
de Grijs, R., Peletier, R. F.
core +5 more sources
HST observations of the LMC field around SN87A: distance determinations with Red Clump and Tip of the Red Giant Branch stars [PDF]
, 1999 We have used HST-WFPC2 multiband observations of a field around SN 1987A in the Large Magellanic Cloud to measure its distance from the Sun. The observations allowed us to carefully determine the interstellar extinction along the line of sight to a large
Bessel M. S. +10 more
core +2 more sources
The Astronomical Journal, 2023 The accuracy of stellar distances inferred purely from parallaxes degrades rapidly with distance. Proper motion measurements, when combined with some idea of typical velocities, provide independent information on stellar distances.
C. A. L. Bailer-Jones
doaj +1 more source
AGB variables as distance indicators [PDF]
International Astronomical Union Colloquium, 2004 AbstractEvidence for the existence of Mira Period-Luminosity relations is reviewed including recent work on Miras with thick circumstellar shells. The calibration of the relation at K is discussed in detail. The nature of variables deviating from the PL relation and possible metallicity effects are also discussed.
openaire +3 more sources
Travel Matrix Decomposition for Understanding Spatial Long-Distance Travel Structure
Complexity, 2023 Mobile phone location data enable us to obtain accurate and temporally detailed long-distance travel distribution. However, the traditional long-distance travel distribution model cannot normally handle this detailed temporal information.
Hiromichi Yamaguchi +2 more
doaj +1 more source
Open Praxis, 2023 Due to the forces of globalization, higher education institutions have increased their participation in international partnerships and the flow of academic services and resources across borders.
Rebecca E. Heiser
doaj +1 more source
Composite indicator as a distance
, 2022 Programa de Doctorat en Desenvolupament Local i Cooperació ...
openaire +1 more source
EVALUATION INDICATORS IN DISTANCE EDUCATION AT THE UNIVERSITY SYSTEM
RIED: Revista Iberoamericana de Educación a Distancia, 2001 The key- question the article propose is if it is possible to stablish a unique quality indicators system for all the universities. We realize there is no a consensus about which are the objectives at the University level.
Javier Callejo +4 more
doaj +1 more source
Frontiers in Built Environment, 2021 The spread of pandemics such as COVID-19 is strongly linked to human activities. The objective of this article is to specify and examine early indicators of disease spread risk in cities during the initial stages of outbreak based on patterns of human ...
Xinyu Gao +6 more
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Process of ranking countries by level of development
Croatian Review of Economic, Business and Social Statistics, 2018 The paper presents the process of ranking and classifying countries using the I-distance method. The I-distance method is a method of classification and multidimensional ranking based on the distance values between selected indicators.
Račić Željko V.
doaj +1 more source