Results 91 to 100 of about 120,351 (278)

Exploring the Mpc Environment of the Quasar ULAS J1342+0928 at z = 7.54

The Astrophysical Journal
Theoretical models predict that z ≳ 6 quasars are hosted in the most massive halos of the underlying dark matter distribution and thus would be immersed in protoclusters of galaxies. However, observations report inconclusive results. We investigate the 1.
Sofía Rojas-Ruiz, Chiara Mazzucchelli, Steven L. Finkelstein, Eduardo Bañados, Emanuele Paolo Farina, Bram P. Venemans, Roberto Decarli, Chris J. Willott, Feige Wang, Fabian Walter, Enrico Congiu, Gabriel Brammer, Peter Zeidler   +12 more
doaj   +1 more source

Design of Remotely Operated Underwater Vehicle (ROUV) for Underwater Metal Detection

Kapal
The underwater surveys and inspections in Indonesia were carried out mostly by the operation of practical divers who were limited to shallow waters. The deep - sea exploration requires more advanced technology. The development of underwater technology is
Raden Sjarief Widjaja, Dedi Budi Purwanto, Andi Trimulyono, Muhammad Nur Abdullah Hafizh   +3 more
doaj   +1 more source

Development and Validation of a One‐Dimensional Finite Difference Simulation Scheme for Polymer Laser Powder Bed Fusion with Application to the Effect of the Inter Layer Time

Advanced Engineering Materials, EarlyView.
The study presents an efficient simulation approach for the polymer laser powder bed fusion process polymers process, validated with polyamide 12, polyamide 6, and polyetherketoneketone. It shows that inter layer time affects part density, with 90s yielding dense parts.
Claas Bierwisch, Bastien Dietemann, Moritz Grünewald, Christian Schlör, Johannes Rudloff   +4 more
wiley   +1 more source

Age Constraints for an M31 Globular Cluster from Main Sequence Photometry

, 2004
We present a color-magnitude diagram (CMD) of the globular cluster SKHB-312 in the Andromeda galaxy (M31), obtained with the Advanced Camera for Surveys on the Hubble Space Telescope.
Allen V. Sweigart, Alvio Renzini, Don A. VandenBerg, Ed Smith, Heitsch E., Henry C. Ferguson, R. Michael Rich, Randy A. Kimble, Thomas M. Brown   +8 more
core   +1 more source

Electrospinning Technology, Machine Learning, and Control Approaches: A Review

Advanced Engineering Materials, Volume 27, Issue 7, April 2025.
Electrospinning produces micro‐ and nanoscale fibers, holding great promise in biomedical engineering. Industrial adoption faces challenges in controlling fiber properties, reproducibility, and scalability. This review explores electrospinning techniques, modeling, and machine learning for process optimization.
Arya Shabani, Gorkem Anil Al, Nael Berri, Bernardo Castro‐Dominguez, Hannah S. Leese, Uriel Martinez‐Hernandez   +5 more
wiley   +1 more source

A Lighthouse Effect in Eta Carinae [PDF]

, 2012
We present a new model for the behavior of scattered time-dependent, asymmetric near-UV emission from the nearby ejecta of {\eta} Car. Using a 3-D hydrodynamical simulation of {\eta} Car's binary colliding winds, we show that the 3-D binary orientation ...
Groh, Jose H., Madura, Thomas I.
core   +1 more source

Mechanisms of Increasing Weld Depth during Temporal Power Modulation in High‐Power Laser Beam Welding

Advanced Engineering Materials, EarlyView.
Temporal power modulation increases weld depth in high‐power laser beam welding of dissimilar round bars by nearly 20% compared to same average continuously welded welding power. The mechanism of action also applies to sheet welding and depends on the inertia of keyhole depth for the modulated laser beam power.
Jan Grajczak, David Reynders, Christian Nowroth, Jens Twiefel, Jörg Wallaschek, Sarah Nothdurft, Jörg Hermsdorf, Stefan Kaierle   +7 more
wiley   +1 more source

The Cosmos in Its Infancy: JADES Galaxy Candidates at z > 8 in GOODS-S and GOODS-N

The Astrophysical Journal
We present a catalog of 717 candidate galaxies at z > 8 selected from 125 square arcmin of NIRCam imaging as part of the JWST Advanced Deep Extragalactic Survey (JADES).
Kevin N. Hainline, Benjamin D. Johnson, Brant Robertson, Sandro Tacchella, Jakob M. Helton, Fengwu Sun, Daniel J. Eisenstein, Charlotte Simmonds, Michael W. Topping, Lily Whitler, Christopher N. A. Willmer, Marcia Rieke, Katherine A. Suess, Raphael E. Hviding, Alex J. Cameron, Stacey Alberts, William M. Baker, Stefi Baum, Rachana Bhatawdekar, Nina Bonaventura, Kristan Boyett, Andrew J. Bunker, Stefano Carniani, Stephane Charlot, Jacopo Chevallard, Zuyi Chen, Mirko Curti, Emma Curtis-Lake, Francesco D’Eugenio, Eiichi Egami, Ryan Endsley, Ryan Hausen, Zhiyuan Ji, Tobias J. Looser, Jianwei Lyu, Roberto Maiolino, Erica Nelson, Dávid Puskás, Tim Rawle, Lester Sandles, Aayush Saxena, Renske Smit, Daniel P. Stark, Christina C. Williams, Chris Willott, Joris Witstok   +45 more
doaj   +1 more source

Intermediate Old Star Clusters in a Young Starburst: The case of NGC 5253

, 2012
We investigate the star cluster population in the outer parts of the starburst galaxy NGC 5253 using archive images taken with the Hubble Space Telescope's Advanced Camera for Surveys.
Alonso-Herrero, Bastian, Beck, Brodie, Caldwell, Calzetti, Calzetti, Cignoni, Cresci, D. Crnojević, D. Harbeck, Davidge, Dellenbusch, Dong, Harris, J. Gallagher, Karachentsev, Kobulnicky, Kotulla, Leitherer, López-Sánchez, Marconi, McQuinn, McQuinn, Schlegel, Sirianni, Thilker, Tremonti, van den, Weidner, Woodley   +30 more
core   +1 more source

Simulation of Inhomogeneous Refractive Index Fields Induced by Hot Tailored Forming Components

Advanced Engineering Materials, EarlyView.
This article presents a simulation model for simulating inhomogeneous refractive index fields (IRIF) in hot‐forged components, accounting for thermal influences and complex geometries. Through this simulation, a priori knowledge about the propagation of the IRIF can be obtained, allowing for the positioning of the component or an optical measurement ...
Pascal Kern, Lennart Hinz, Markus Kästner, Eduard Reithmeier   +3 more
wiley   +1 more source