Results 101 to 110 of about 341,826 (304)

Cluster AgeS Experiment (CASE): RR Lyrae stars from the globular cluster Omega Centauri as standard candles [PDF]

, 2003
New photometry of RRab and RRc stars in Omega Cen is used to calibrate their absolute magnitudes M_V as a function of: a) metallicity; and b) the Fourier parameters of light curves in the V band. The zero point of both calibrations relies on the distance
A. Olech, A. Schwarzenberg-Czerny, Alves, Butler, Caloi, Caputo, Caputo, Chaboyer, Clementini, Dutra, Fitzpatrick, Fusi Pecci, Gould, Gratton, Groenewegen, Harris, I. B. Thompson, J. Kaluzny, Kaluzny, Kaluzny, Kaluzny, Kovács, Kovács, Kovács, Lee, Lee, Ligeza, Pietrzyński, Rey, Sandage, Sandage, Sarajedini, Schlegel, Schwarzenberg-Czerny, Schwarzenberg-Czerny, Sebo, Simon, Simon, Simon, Thompson, Udalski, Udalski, van Leeuwen, Walker, Walker, Zebruń, Zinn   +46 more
core   +2 more sources

Deformation Behavior of La2O3‐Doped Copper during Equal Channel Angular Pressing

Advanced Engineering Materials, EarlyView.
By additions of strengthening elements and/or structure optimization, the mechanical properties of copper can be increased while keeping favorable electric conductivity. By combining addition of La2O3 and processing by equal channel angular pressing, substructure development is achieved, leading to increase in microhardness to more than double the ...
Lenka Kunčická, Josef Walek, Radim Kocich   +2 more
wiley   +1 more source

New distances to RAVE stars [PDF]

, 2013
Probability density functions are determined from new stellar parameters for the distance moduli of stars for which the RAdial Velocity Experiment (RAVE) has obtained spectra with S/N>=10.
Bienayme, Olivier, Binney, James, Bland-Hawthorn, Joss, Burnett, Ben, Gilmore, Gerry, Grebel, Eva K., Helmi, Amina, Kordopatis, Georges, McMillan, Paul J, Navarro, Julio, Parker, Quentin, Reid, Warren A., Seabroke, George, Sharma, Sanjib, Steinmetz, Matthias, Watson, Fred, Williams, Mary E. K., Wyse, Rosie F. G., Zwitter, Tomaz   +18 more
core   +5 more sources

Low‐Activation Compositionally Complex Alloys for Advanced Nuclear Applications—A Review

Advanced Engineering Materials, EarlyView.
Low‐activation compositionally complex alloys (LACCAs) are advanced metallic materials primarily composed of low‐activation elements, offering advantages such as rapid compliance with operational standards and safe recyclability. This review highlights their potential for extreme high‐temperature irradiation environments as structural materials for ...
Yangfan Wang, Hanliang Zhu, Zhiyang Wang, Zhijun Qiu, Xiao Wang, Zengxi Pan, Hongtao Zhu, Mingxing Zhang, Huijun Li   +8 more
wiley   +1 more source

Astrometry with Hubble Space Telescope: A Parallax of the Fundamental Distance Calibrator RR Lyrae [PDF]

, 2001
We present an absolute parallax and relative proper motion for the fundamental distance scale calibrator, RR Lyr. We obtain these with astrometric data from FGS 3, a white-light interferometer on HST. We find $\pi_{abs} = 3.82 \pm 0.2$ mas.
A. J. Bradley, A. L. Whipple, B. E. McArthur, Benedict G. F., Bergeat J., C. L. Slesnick, D. Story, E. Nelan, Feast M. W., Feast M. W., Fernley J., G. Fritz Benedict, Groenewegen M. A. T., Groenewegen M. A. T., Guinan E. F., Hanson R. B., J. Lee, J. Rhee, Kovacs G., L. H. Wasserman, L. W. Fredrick, Laney C. D., Luri X., Maloney F. P., Monet D. G., O. G. Franz, P. D. Hemenway, P. J. Shelus, Paczynski B., Paltoglou G., Perryman M. A. C., R. J. Patterson, R. L. Duncombe, Schmidt-Kaler Th., Standish E. M., Jr., Stanek K. Z., T. E. Harrison, Udalski A., Udalski A., Udalski A., Udalski A., van Leeuwen F., W. H. Jefferys, W. van Altena, Wood P. R.   +44 more
core   +3 more sources

An Integrated MATLAB Code for Homogenization‐Based Topology Optimization and Generating Functionally Graded Surface Lattices for Additive Manufacturing

Advanced Engineering Materials, EarlyView.
Unlocking structural efficiency, this work integrates homogenization‐based topology optimization with functionally graded triply periodic minimal surface lattices to create highly efficient, customizable lattice structures. Key achievements include the development of a versatile MATLAB framework, optimization of mechanical properties for additive ...
Mirhan Ozdemir, Ugur Simsek, Cemal Efe Gayir, Kadir Gunaydin, Orhan Gulcan   +4 more
wiley   +1 more source

Laser Additive Manufacturing of Oxide‐Dispersion‐Strengthened Steels: A Simulation‐Based Comparison Between Powder Bed Fusion and Direct Energy Deposition

Advanced Engineering Materials, EarlyView.
Controlling the size and distribution of dispersoids is essential for optimizing the performance of oxide‐dispersion‐strengthened steels. This study focuses on nanoparticle dispersion and agglomeration during laser additive manufacturing of Fe20Cr alloy reinforced with ZrO 2 nanoparticles. Utilizing multiphysics phase‐field simulations and nanoparticle
Somnath Bharech, Yangyiwei Yang, Timileyin David Oyedeji, Prasanth Bondi, Mareen Goßling, Bilal Gökce, Bai‐Xiang Xu   +6 more
wiley   +1 more source

Distance measures in cosmology [PDF]

, 1999
Formulae for the line-of-sight and transverse comoving distances, proper motion distance, angular diameter distance, luminosity distance, k-correction, distance modulus, comoving volume, lookback time, age, and object intersection probability are all ...
Hogg, David W.
core   +5 more sources

New distance and depth estimates from observations of eclipsing binaries in the SMC [PDF]

, 2008
A sample of 33 eclipsing binaries observed in a field of the SMC with FLAMES@VLT is presented. The radial velocity curves obtained, together with existing OGLE light curves, allowed the determination of all stellar and orbital parameters of these binary ...
Andersen, De Mink, Frédéric Royer, Guinan, Hadrava, Hadrava, Hensberge, Hensberge, Lucy, Paczyński, Pavlovski, Pierre L. North, Romain Gauderon, Simon, Van Rensbergen, Wilson, Wyrzykowski   +16 more
core   +3 more sources

X‐Ray Computed Tomography Quantifies Primary Phases and Reveals Crack Morphology in High‐Cycle Fatigue of Aluminum Alloy EN AW‐2618A

Advanced Engineering Materials, EarlyView.
Primary phases and a fatigue crack are studied in a forged blank of an aluminum alloy using synchrotron and laboratory X‐ray computed tomography. To image the crack, the fatigue test is interrupted, and a static tensile load is applied to open the crack.
Jakob Schröder, Ying Han, Tobias Fritsch, Bardia Hejazi, Alexander Ulbricht, Birgit Skrotzki, Giovanni Bruno   +6 more
wiley   +1 more source