Results 81 to 90 of about 148,841 (287)

Laser Powder Bed Fusion of Copper–Tungsten Composites for Heat Sink Applications in High‐Power Electronics

Advanced Engineering Materials, EarlyView.
This article demonstrates the successful qualification of a copper–tungsten composite for laser powder bed fusion. The resulting components exhibited high density, high thermal conductivity, and reduced thermal expansion. Heat sinks with complex geometries were successfully manufactured, clearly showcasing the material's potential for additive ...
Simon Rauh, Shashank Deepak Prabhu, Jannik Huber, Lioba Fischer, Gerhard Wolf, Nico Hempel, Peter Mayr   +6 more
wiley   +1 more source

Alterations in T1 of normal and reperfused infarcted myocardium after Gd-BOPTA versus GD-DTPA on inversion recovery EPI. [PDF]

, 1997
This study tested whether Gd-BOPTA/Dimeg or Gd-DTPA exerts greater relaxation enhancement for blood and reperfused infarcted myocardium. Relaxivity of Gd-BOPTA is increased by weak binding to serum albumin.
Cavagna, F, Derugin, N, Higgins, Charles, Lauerma, K, Mintorovitch, J, Saeed, M, Wendland, M   +6 more
core  

Magnetic quantum tunnelling in Fe8 with excited nuclei

, 2009
We investigate the effect of dynamic nuclear spin fluctuation on quantum tunneling of the magnetization (QTM) in the molecular magnet Fe8 by increasing the nuclei temperature using radio frequency (RF) pulses before the hysteresis loop measurements.
A. Abragam, Amit Keren, Efrat Shimshoni, L. Landau, Miki Ueda, Oren Shafir, Satoru Maegawa   +6 more
core   +1 more source

Advancing Research on Biomaterials and Biological Materials with Scanning Electron Microscopy under Environmental and Low Vacuum Conditions

Advanced Engineering Materials, EarlyView.
Herein, environmental scanning electron microscopy (ESEM) is discussed as a powerful extension of conventional SEM for life sciences. By combining high‐resolution imaging with variable pressure and humidity, ESEM allows the analysis of untreated biological materials, supports in situ monitoring of hydration‐driven changes, and advances the functional ...
Jendrian Riedel, Lea Dierker, Antoine Eyram Kwame, Kim Nora Wagner, Jonas J. Unterholzner, Jan‐Henning Dirks, Dorothea Brüggemann   +6 more
wiley   +1 more source

Biased perceptions of public opinion don't define echo chambers but reveal systematic differences in political awareness.

PLoS ONE
Echo chambers are widely acknowledged as a feature of online discourse and current politics: a phenomenon arising when people selectively engage with like-minded others and are shielded from opposing ideas.
Crispin H V Cooper, Kevin Fahey, Regan Jones   +2 more
doaj   +1 more source

The Relationship Between Emotional and Other Factors in Information Diffusion

IEEE Access
With the recent proliferation of social media, the spread of disinformation and misinformation has become a global risk. This study analyzes and characterizes the relationship between human emotions and other elements (social bots and echo chambers ...
Shuhei Ippa, Takao Okubo, Masaki Hashimoto   +2 more
doaj   +1 more source

Diffusion NMR Methods Applied to Xenon Gas for Materials Study

, 2002
We report initial NMR studies of i) xenon gas diffusion in model heterogeneous porous media, and ii) continuous flow laser-polarized xenon gas. Both areas utilize the Pulsed Gradient Spin Echo techniques in the gas-phase, with the aim of obtaining more ...
Cory, D. G., Mair, R. W., Rosen, M. S., Walsworth, R. L., Wang, R.   +4 more
core   +1 more source

Unidirectional Tape‐Based Composites from Hemp and Pineapple Leaf Fiber: Mechanical Performance in Conventional and Bio‐Based Matrices

Advanced Engineering Materials, EarlyView.
The study investigates novel semi‐finished products made of unidirectionally arranged hemp or pineapple leaf fiber‐reinforced composites produced from different matrices. The materials are analyzed in terms of their mechanical and interfacial properties and void content.
Nina Graupner, Raja Bade, Valentin Ackermann, Roja M. Baumann, Corvin Bischoff, Jona F. Ebeling, Oskar Glenz, Marlo Groh, Jonathan Groth, Finja Hiller, Tom Hirschmüller, Felix Menke, Syntcha Ngantchou Lecdou, Mika Ohler, Daniel Rafii Vardiny, Darius Richter, Dario Röper, Henrik Schumacher, Theresa Stein, Benjamin Vorbeck, Elisabeth Wermter, Kay Kölzig, Jörg Müssig   +22 more
wiley   +1 more source

Disinformation Dynamics Unveiling the Impact of Echo Chambers in Shaping Online Public Opinion

Bulletin of "Carol I" National Defense University
The proliferation of misinformation and the emergence of echo chambers in the online environment pose significant challenges to modern democracies, directly impacting public opinion and social behaviors.
Ștefania-Elena STOICA
doaj   +1 more source

Opening up the echo chamber: Perspective taking in social science education

Acta Didactica Norden, 2020
Public discourse is increasingly polarised when it comes to contemporary political and controversial issues. The debating climate has been described as an “echo chamber” where we tend to find arguments supporting our own established truths rather than ...
Johan Sandahl
doaj   +1 more source