Results 91 to 100 of about 3,322,345 (245)

Thermal Cycle–Microstructure–Property Relationships in Rail Steel Heat‐Affected Zone Simulated by Gleeble

Advanced Engineering Materials, EarlyView.
Microstructural evolution of premium rail steel during flash butt welding (FBW), comparing physically simulated heat‐affected zones with actual weld regions. Thermal cycles induce phase transformations and microstructural heterogeneity that influence weld quality and mechanical performance. These findings provide insights into optimizing FBW parameters
Emmanoelle Cintra da Cunha Araújo, João Marcos da Silva Nunes, Marcelly Cristiny Nunes de Carvalho, Alex Rojas, Cristie Luis Kugelmeier, Cristhian Ricardo Loayza Loayza, João Carlos Ferreira, Maria Veronica Goncalves Rodrigues, Rute Sayuri Kano, Isaac Araújo Furtado, Jacyara Dalylla da Silva Nunes, Jhonatan Peres de Sousa, Marcos Natan da Silva Lima, Eden Santos Silva, Gedeon Silva Reis, Samuel Filgueiras Rodrigues   +15 more
wiley   +1 more source

Cerebral Perfusion Monitoring Using Near-Infrared Spectroscopy During Head-Up Tilt Table Test in Patients With Orthostatic Intolerance

Frontiers in Human Neuroscience, 2019
The head-up tilt table test (HUT) is one of the primary clinical examinations for evaluating orthostatic intolerance (OI). HUT can be divided into three phases: dynamic tilt phase (supine to tilt up), static tilt phase (remain tilted at 70°), and post ...
Yoo Hwan Kim, Yoo Hwan Kim, Seung-ho Paik, Zephaniah Phillips V, Nam-Joon Jeon, Byung-Jo Kim, Byung-Jo Kim, Beop-Min Kim   +7 more
doaj   +1 more source

DNA DOUBLE STRAND REPAIR DURING HEAD-DOWN-TILT BEDREST: AGBRESA MEETS RADIATION [PDF]

, 2020
BACKGROUND Radiation and reduced gravity impose a major burden on health and performance during human spaceflight. While radiation increases cancer risk and limits tissue regeneration, reduced gravity predisposes to musculoskeletal and cardiovascular ...
Berwanger, C., Diegeler, S., Hellweg, C.E., Schrage-Knoll, I., Mulder, E., Kraus, G., Jordan, J, Kronenberg, J., Bohmeier, M., Huth, E., Paulke, F., Schmitz, C., Lecheler, L.   +12 more
core  

Perceived Vertical and Lateropulsion: Clinical Syndromes, Localization, and Prognosis [PDF]

, 2000
We present a clinical classification of central vestibular syndromes according to the three major planes of action of the vestibulo-ocular reflex: yaw, roll, and pitch.
Dieterich, Marianne, Brandt, Thomas
core   +1 more source

Microstructural, Mechanical, and Textural Evolution of Dissimilar Combination of Laser‐Welded Maraging Steel and 4340 Steel

Advanced Engineering Materials, EarlyView.
The present work reports the microstructural, mechanical, and texture evolution of a dissimilar combination laser‐welded maraging steel with 4340 steel. This is important for aerospace applications. The demand for dissimilar welding is growing rapidly with the requirement of efficient and durable joints.
Bharat Behl, Yu Dong, Alokesh Pramanik, Tapas Kumar Bandyopadhyay   +3 more
wiley   +1 more source

T2-relaxation time increases in lumbar intervertebral disks after 21d head-down tilt bed-rest [PDF]

, 2017
Objectives: Spaceflight back pain and intervertebral disc (IVD) herniations cause problems in astronauts. Purpose of this study was to assess changes in T2-relaxation-time through MRI measurements before and after head-down tilt bed-rest, a spaceflight ...
Rittweger, Jörn, Eysel, Peer, Bansmann, Martin, Ganse, Bergita, Pohle-Fröhlich, Regina, Felsenberg, Dieter, Frings-Meuthen, Petra, Johannes, Bernd Wolfgang, Koy, Timmo, Belavy, Daniel Ludovic   +9 more
core  

Twenty-four hours of bed rest with head-down tilt: venous and arteriolar changes of limbs

, 1991
The hemodynamic changes after 24 h of bed rest with -5 degree head-down tilt were studied in six normal subjects as a condition causing an intrathoracic shift of blood volume with a resulting urinary sodium and water loss and a subsequent reduction in ...
P. J. Lacolley, G. M. London, C. Gharib, M. E. Safar, B. M. Pannier, J. L. Cuche, J. L. Duchier, B. I. Levy   +7 more
core   +1 more source

Counterion Dependent Side‐Chain Relaxation Stiffens a Chemically Doped Thienothiophene Copolymer

Advanced Functional Materials, EarlyView.
Oxidation of a thienothiophene copolymer, p(g3TT‐T2), via different doping strategies and dopant molecules resulted in materials with similar oxidation levels and a high electrical conductivity of ≈100 S cm−1. However, mechanical properties varied significantly, with sub‐glass transition temperatures and elastic moduli spanning from –44°C to –3°C and ...
Mariavittoria Craighero, Meghna Jha, Elsa Veronica Flores‐Vela, Joost Kimpel, Andreas Schaefer, Jiali Guo, Jesika Asatryan, Alberto Peinador Veiga, Shuichi Haraguchi, Per‐Anders Carlsson, Jaime Martín, Mariano Campoy‐Quiles, Christian Müller   +12 more
wiley   +1 more source

Advances in Sustainable and Wearable Textile Based Soft Robotics

Advanced Functional Materials, EarlyView.
This Review examines advances in wearable textile‐based soft robotics, focusing on sustainable materials, integrated sensing, and scalable actuation. It discusses manufacturing and system integration across healthcare, assistive robotics, prosthetics, and human–machine interfaces, and highlights key challenges in circular design, including life‐cycle ...
Zahir Abbas, Marzia Dulal, Sophia K. Novoselov, Victoria K. Novoselov, Kostya S. Novoselov, Shaila Afroj, Nazmul Karim   +6 more
wiley   +1 more source

Cohen et al. Supplemental Figure 2: Vector flow imaging of the internal jugular vein in different levels of head-down tilt

Vector flow imaging of the internal jugular vein in the longitudinal view at different levels of head-down (HDT) tilt at the caudal (first half) and cranial (second half) levels in a representative 26-year-old male participant.
Jason Au (6893915), Jeremy Cohen (16414377)   +1 more
core   +1 more source