Results 61 to 70 of about 1,218,885 (321)

Proper Motion of Dense Circumstellar Knots in the Supernova Remnant Cassiopeia A

The Astrophysical Journal Supplement Series
The young supernova remnant Cassiopeia A is currently interacting with the circumstellar medium expelled by its progenitor star. We analyzed the proper motion of dense circumstellar clumps, known as quasi-stationary flocculi (QSFs), embedded within the ...
Bon-Chul Koo, Sang Bum Ko, Christopher F. McKee, Carl Heiles, Robert A. Fesen, Ji Yeon Seok, Hyun-Jeong Kim, Sung-Chul Yoon   +7 more
doaj   +1 more source

A Qualitative Analysis of Patient Perspectives and Preferences in Lupus Management to Guide Lupus Guidelines Development

Arthritis Care &Research, EarlyView.
Objective A patient‐centered approach for chronic disease management, including systemic lupus erythematosus (SLE), aligns treatment with patients’ values and preferences, leading to improved outcomes. This paper summarizes how patient experiences, perspectives, and priorities informed the American College of Rheumatology (ACR) 2024 Lupus Nephritis (LN)
Shivani Garg, Izzy Hartel, Lisa R. Sammaritano, Anca Askanase, Bonnie L. Bermas, Maria Dall'Era, Alí Duarte‐García, Victoria P. Werth, Brad Rovin, Reem A. Mustafa, Amy S. Turner, Bené Williams, Brian L. Ung, Hiya Bhavsar, Monique C. Gore‐Massy, Nahirannette Pulido, Natacha Guerrero, Natalie M. Smith, Wambui Machua, Linda T. Hiraki, Mary Beth Son   +20 more
wiley   +1 more source

Galaxy population structure from proper motions [PDF]

Symposium - International Astronomical Union, 1985
We are currently engaged in astrometry of Kapteyn Selected Area photographic plates covering the period 1908 to the present day using the GALAXY measuring engine at RGO. Our intention is to use the apparent motions to investigate the stellar velocity structure within a kiloparsec of the Sun.
N. Reid, C. A. Murray
openaire   +1 more source

The Proper Motion of the High Galactic Latitude Pulsar Calvera

The Astrophysical Journal
Calvera (1RXS J141256.0+792204) is a pulsar of characteristic age 285 kyr at a high Galactic latitude of b = +37°, detected only in soft thermal X-rays.
M. Rigoselli, S. Mereghetti, J. P. Halpern, E. V. Gotthelf, C. G. Bassa   +4 more
doaj   +1 more source

X-Ray Measured Dynamics of Tycho's Supernova Remnant

, 2010
We present X-ray proper-motion measurements of the forward shock and reverse-shocked ejecta in Tycho's supernova remnant, based on three sets of archival Chandra data taken in 2000, 2003, and 2007.
Albinson, Asami Hayato, Badenes, Badenes, Bamba, Cassam-Chenaï, Decourchelle, DeLaney, Dwarkadas, Dwarkadas, Ellison, Furuzawa, Hamuy, Hernández, Hiroshi Tsunemi, Hiroya Yamaguchi, Hughes, Hwang, Hwang, Ihara, John P. Hughes, Katsuda, Kerzendorf, Koji Mori, Lee, Pohl, Reynoso, Reynoso, Riess, Robert Petre, Ruiz-Lapuente, Satoru Katsuda, Strom, Strom, Tamagawa, Tan, Uchiyama, Una Hwang, Velazquez, Vink, Warren, Yang   +41 more
core   +1 more source

Current Tracking Adaptive Control of Brushless DC Motors

International Journal of Adaptive Control and Signal Processing, EarlyView.
In this paper, the current tracking for Brushless Direct Current motors is approached considering uncertainty in the parameters of the motor's model. An adaptive control scheme to compensate electrical parameters uncertainty is proposed without requiring any knowledge of the mechanical parameters.
Fernanda Ramos‐García, Axel Coronado‐Andrade, Gerardo Espinosa‐Pérez, Luis Alvarez‐Icaza   +3 more
wiley   +1 more source

Superluminal Proper Motion in the X-Ray Jet of Centaurus A

The Astrophysical Journal
The structure of the jet in Cen A is likely better revealed in X-rays than in the radio band, which is usually used to investigate jet proper motions. In this paper, we analyze Chandra Advanced CCD Imaging Spectrometer observations of Cen A from 2000 to ...
David Bogensberger, Jon M Miller, Richard Mushotzky, W. N. Brandt, Elias Kammoun, Abderahmen Zoghbi, Ehud Behar   +6 more
doaj   +1 more source

A Chandra Proper Motion for PSR J1809-2332

, 2012
We report on a new Chandra exposure of PSR J1809-2332, the recently discovered pulsar powering the bright EGRET source 3EG J1809-2328. By registration of field X-ray sources in an archival exposure, we measure a significant proper motion for the pulsar ...
Adam Van Etten, Braje, C.-Y. Ng, Hartman, Ng, Oka, Ray, Roberts, Roberts, Roger W. Romani, Romani   +10 more
core   +1 more source

Enhancing Corrosion Resistance and Mechanical Strength of 3D‐Printed Iron Polylactic Acid for Marine Applications via Laser Surface Texturing

Advanced Engineering Materials, EarlyView.
Laser surface texturing significantly improves the corrosion resistance and mechanical strength of 3D‐printed iron polylactic acid (Ir‐PLA) for marine applications. Optimal laser parameters reduce corrosion by 80% and enhance tensile strength by 25% and ductility by 15%.
Mohammad Rezayat, Mojtaba Karamimoghadam, Mohammadreza Lalegani Dezaki, Ali Zolfagharian, Giuseppe Casalino, Antonio Mateo, Mahdi Bodaghi   +6 more
wiley   +1 more source

Proper Motion

, 2013
Proper Motion (in the sense of "intrinsic to the object") is the apparent angular motion of stars across the sky, due to their orbits around the center of the Milky Way Galaxy. Lacking any depth perception, astronomers have to use different techniques to measure a star’s radial (directly toward or away from us) and transverse (across the sky) motions ...
openaire   +1 more source