Results 51 to 60 of about 5,019,889 (353)

The specific entropy of elliptical galaxies: an explanation for profile-shape distance indicators? [PDF]

, 1999
Dynamical systems in equilibrium have a stationary entropy; we suggest that elliptical galaxies, as stellar systems in a stage of quasi-equilibrium, may have a unique specific entropy.
G. B. Lima Neto, I. Maârquez W, Lima Neto Gerbal, W D. Gerbal   +3 more
core   +3 more sources

The Hubble Space Telescope Key Project on the Extragalactic Distance Scale. XXVI. The Calibration of Population II Secondary Distance Indicators and the Value of the Hubble Constant [PDF]

, 1999
A Cepheid-based calibration is derived for four distance indicators that utilize stars in old stellar populations: the tip of the red giant branch (TRGB), the planetary nebula luminosity function (PNLF), the globular cluster luminosity function (GCLF ...
L. Ferrarese, J. Mould, R. Kennicutt, J. Huchra, H. Ford, W. Freedman, P. Stetson, B. Madore, S. Sakai, B. Gibson, J. Graham, S. Hughes, G. Illingworth, D. Kelson, L. Macri, K. Sebo, N. Silbermann   +16 more
semanticscholar   +1 more source

RESEARCH OF THE METHODS EFFICIENCY FOR DETERMINING THE DISTANCE AND GEOMETRIC OBJECTS PARAMETERS OF TECHNICAL VISION SYSTEMS

Сучасні інформаційні системи, 2020
Study subject. The article discusses methods for determining the distance to objects and their geometric parameters using the vision systems. The goal is a comparative analysis of the quality indicators of the most used methods for determining the ...
Valeriy Barsov, Olena Kosterna, Oleksandr Plakhotnyi   +2 more
doaj   +1 more source

Globular Cluster Distance Determinations [PDF]

, 1998
The present status of the distance scale to Galactic globular clusters is reviewed. Six distance determination techniques which are deemed to be most reliable are discussed in depth. These different techniques are used to calibrate the absolute magnitude
A Renzini, A Renzini, AR Sandage, AR Sandage, AR Walker, AR Walker, B Chaboyer, B Chaboyer, B Chaboyer, B Paczyński, BW Carney, BW Carney, C Sneden, C Sneden, D Burnstein, D Minniti, E Brocato, E Carretta, F Caputo, F Fusi Pecci, F Grundahl, F Pont, G Kovćs, IN Reid, IN Reid, IN Reid, J Fernley, J Fernley, J Kaluzny, JR McVean, KM Cudworth, M Catelan, NR Simon, P Nissen, R Buonanno, R Buonanno, R Jimenez, R Zinn, R Zinn, RF Rees, RG Gratton, RP Kraft, RP Kraft, S Cassisi, V Caloi, VM Canuto, WE Harris, Y-W Lee, Y-W Lee, Y-W Lee   +49 more
core   +3 more sources

Research on Economic Periodicity Based on Principal Component-Weighted Distance and Clustering Analysis [PDF]

E3S Web of Conferences, 2020
Based on the knowledge of economics, this paper selects 22 macroeconomic indicators that best reflect the overall economic situation of the United States.
Yan Jiayi, Pu Qian, Liu Junfei
doaj   +1 more source

The Effect of Strength Training on Performance Indicators in Distance Runners

Journal of Strength and Conditioning Research, 2017
Beattie, K, Carson, BP, Lyons, M, Rossiter, A, and Kenny, IC. The effect of strength training on performance indicators in distance runners. J Strength Cond Res 31(1): 9–23, 2017—Running economy (RE) and velocity at maximal oxygen uptake (VV[Combining ...
Kris Beattie, B. Carson, M. Lyons, A. Rossiter, Ian C. Kenny   +4 more
semanticscholar   +1 more source

Distance Eigenvalues, Forwarding Indices, and Distance-based Topological Indices of Complement of Two Circulant Networks

, 2021
13 pages, 4 figures, and 4 ...
Antalan, John Rafael Macalisang, Campeña, Francis Joseph Hernandez   +1 more
openaire   +3 more sources

Stereotactic Body Radiation Therapy for Pediatric, Adolescent, and Young Adult Patients With Osteosarcoma: Local Control Outcomes With Dosimetric Analysis

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background/Objectives Osteosarcoma is a radioresistant tumor that may benefit from stereotactic body radiation therapy (SBRT) for locoregional control in metastatic/recurrent disease. We report institutional practice patterns, outcomes, toxicity, and failures in osteosarcoma patients treated with SBRT.
Jenna Kocsis, Shauna R. Campbell, Jonathan Jang, Eashwar Somasundaram, Chandana A. Reddy, Jacob G. Scott, Lilyana Angelov, Peter M. Anderson, Matteo Trucco, Zachary Burke, Lukas Nystrom, Nathan Mesko, Anthony Magnelli, Erin S. Murphy   +13 more
wiley   +1 more source

A 4% Geometric Distance to the Galaxy NGC4258 from Orbital Motions in a Nuclear Gas Disk [PDF]

, 1999
The water maser in the mildly active nucleus in the nearby galaxy NGC4258 traces a thin, nearly edge-on, subparsec-scale Keplerian disk. Using the technique of very long baseline interferometry, we have detected the proper motions of these masers as they
A. Riess, AE Bragg, BF Madore, C. Henkel, G Cecil, GH Jacoby, J. M. Moran, J. R. Herrnstein, JA Zensus, JM Moran, JR Herrnstein, JR Herrnstein, JR Herrnstein, JR Herrnstein, L. J. Greenhill, LG Greenhill, LJ Greenhill, M Aaronson, M Eracleous, M Miyoshi, M Rowan-Robinson, M. Inoue, M. Miyoshi, N Nakai, N. Nakai, O-G Richter, P. J. Diamond, WD Watson   +27 more
core   +3 more sources

Supernova Legacy Survey: using spectral signatures to improve Type Ia supernovae as distance indicators [PDF]

, 2010
GMOS optical long-slit spectroscopy at the Gemini-North telescope was used to classify targets from the Supernova Legacy Survey (SNLS) from July 2005 and May 2006 - May 2008. During this time, 95 objects were observed.
E. Walker, I. Hook, M. Sullivan, D. Howell, P. Astier, C. Balland, S. Basa, T. Bronder, R. Carlberg, A. Conley, D. Fouchez, J. Guy, D. Hardin, R. Pain, K. Perrett, C. Pritchet, N. Regnault, J. Rich, G. Aldering, H. Fakhouri, T. Kronborg, N. Palanque-Delabrouille, S. Perlmutter, V. Ruhlmann-Kleider, T. Zhang   +24 more
semanticscholar   +1 more source