Results 21 to 30 of about 1,473 (119)

First In Vivo 23Na Human Imaging at 10.5 T Using a Combined Sodium‐Proton Transceiver Body Array

Magnetic Resonance in Medicine, Volume 95, Issue 4, Page 2429-2441, April 2026.
ABSTRACT Purpose To demonstrate the first in vivo human 23Na MRI at 10.5 T using a novel dual‐tuned transceiver body array and to evaluate a self‐gating approach for respiratory motion compensation, focusing on renal imaging. Methods A custom‐built eight‐channel 23Na‐loop 1H‐dipole transceiver array was designed, constructed, and characterized.
Simon Schmidt, Arcan M. Ertürk, Gregory J. Metzger   +2 more
wiley   +1 more source

Red Type-1 Quasars after Cosmic Noon and Impact on L UV-related Quasar Statistics

The Astrophysical Journal
Over the past decades, nearly a million quasars have been explored to shed light on the evolution of supermassive black holes and galaxies. The ultraviolet-to-optical spectra of type-1 quasars particularly offer insights into their black hole activities.
Yongjung Kim, Dohyeong Kim, Myungshin Im, Minjin Kim   +3 more
doaj   +1 more source

Commissioning and clinical implementation of an MLC tracking system: An evaluation of AAPM TG‐264 guidelines

Journal of Applied Clinical Medical Physics, Volume 27, Issue 3, March 2026.
Abstract Background Precise radiotherapy relies on accurately targeting tumours while minimising exposure to healthy tissue, yet patient and organ motion complicate treatment delivery. To address intra‐fractional motion, multi‐leaf collimator (MLC) tracking systems have recently been adopted, adapting beam shapes in real‐time.
André Haraldsson, Tobias Pommer, Emilia Persson, Hedda Enocsson, Mustafa Kadhim, Adalsteinn Gunnlaugsson, Per Munck af Rosenschöld   +6 more
wiley   +1 more source

Circum-Galactic Medium in the Halo of Quasars

Frontiers in Astronomy and Space Sciences, 2017
The properties of circum-galactic gas in the halo of quasar host galaxies are investigated analyzing Mg II 2800 and C IV 1540 absorption-line systems along the line of sight close to quasars.
Riccardo Ottolina, Renato Falomo, Aldo Treves, Michela Uslenghi, Jari K. Kotilainen, Riccardo Scarpa, Emanuele Paolo Farina   +6 more
doaj   +1 more source

Work in Progress: Use of Wood‐Based Inserts in Injection Molding

Engineering Reports, Volume 8, Issue 3, March 2026.
The study investigates the suitability of wood‐based mold inserts for the production of small series in polymer injection molding, showing that specially modified materials like laminated beech and compressed bamboo are more promising than natural woods. The results indicate that reproducible components can be produced with these tools. ABSTRACT In the
David Grundmann, Michael Mainz, Leo Munier, Fabian Dillenhöfer, Alexander Pfriem, Bernd Künne, Marcel Bartz   +6 more
wiley   +1 more source

Impact of Radio-mode Feedback on the Covering Fraction of the Circumgalactic Medium of Quasars

The Astrophysical Journal
Utilizing data from the Low-Frequency Array Two-meter Sky Survey and the Sloan Digital Sky Survey, we assemble a sample of 1469 projected quasar pairs with detected radio emissions from foreground quasars, as well as a control sample of 5846 pairs ...
Wen-Qiang Liang, Zhi-fu Chen, Rui-Jing Lu, Jing Li, Zhe-Geng Chen   +4 more
doaj   +1 more source

Anisotropy Analysis of Bamboo and Tooth Using 4‐Angle Polarization Micro‐Spectroscopy

Nano Select, Volume 7, Issue 3, March 2026.
Super‐resolution via orientation: spatial distribution of specific molecular vibrations are revealed at 1/20 of the diffraction limit. ABSTRACT To investigate the anisotropic properties of biomaterials, two distinct classes are considered as follows: polymer‐based (cellulose in plants) and crystalline‐based (enamel in teeth), each demonstrating ...
Meguya Ryu, Hsin‐Hui Huang, Jitraporn Vongsvivut, Soon Hock Ng, Irma Dumbrytė, Donatas Narbutis, Mangirdas Malinauskas, Saulius Juodkazis, Junko Morikawa   +8 more
wiley   +1 more source

The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Quasar Survey: Quasar Properties from Data Releases 10 to 12

The Astrophysical Journal Supplement Series
We present the quasar catalog from Data Releases 10 to 12 of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Quasar Survey, comprising quasars observed between 2021 September and 2024 June. We robustly identified 11,346 quasars, of
Bing Lyu, Xue-Bing Wu, Jun-Jie Jin, Yuming Fu, Yuxuan Pang, Huimei Wang, Rui Zhu, Su Yao, Yan-Li Ai, Yan-xia Zhang, Hai-long Yuan, Zhi-ying Huo   +11 more
doaj   +1 more source

Predicting the Yields of z > 6.5 Quasar Surveys in the Era of Roman and Rubin

The Astrophysical Journal, 2023
About 70 luminous quasars discovered at z > 6.5 are strongly biased toward the bright end, thus not providing a comprehensive view of quasar abundance beyond the cosmic dawn. We present the predicted results of the Roman/Rubin high-redshift quasar survey,
Wei Leong Tee, Xiaohui Fan, Feige Wang, Jinyi Yang, Sangeeta Malhotra, James E. Rhoads   +5 more
doaj   +1 more source

Flame Retardant Polyolefins Using Fibers From Leather Waste: Adjusting Extrusion Variables to Balance the Property Profile

Journal of Vinyl and Additive Technology, Volume 32, Issue 2, Page 410-430, March 2026.
Adjusting extrusion variables are a key to balance the flame retardancy and mechanical properties of polyolefin/leather waste fiber composites. ABSTRACT The extrusion processing variables represent a key to the optimal use of additives and thus the development of flame‐retardant polymer composites. Adjusting the property profile, for example, finding a
Guadalupe Sanchez‐Olivares, Sven Brehme, Fausto Calderas, Bernhard Schartel   +3 more
wiley   +1 more source