Results 51 to 60 of about 63,661 (205)

Measurement of the small-scale structure of the intergalactic medium using close quasar pairs

, 2017
The distribution of diffuse gas in the intergalactic medium (IGM) imprints a series of hydrogen absorption lines on the spectra of distant background quasars known as the Lyman-$\alpha$ forest.
Hennawi, Joseph F., Kulkarni, Girish, Lee, Khee-Gan, Lukić, Zarija, Oñorbe, Jose, Prochaska, J. Xavier, Rorai, Alberto, Walther, Michael, White, Martin   +8 more
core   +1 more source

Process‐Informed Analysis of As‐Built Metal Additive Surface Features

Advanced Engineering Materials, EarlyView.
This article introduces a novel method for feature‐based surface texture characterisation directly incorporating manufacturing variables into the feature extraction workflow. This marks a major step towards identifying process‐specific surface properties and their influence on part function and hence a holistic understanding of process–structure ...
Theresa Buchenau, Adam Thompson, Hauke Brüning, Marc Amkreutz, Bernd Mayer, Samanta Piano   +5 more
wiley   +1 more source

A first step towards a direct inversion of the Lyman forest in QSO spectra

, 1998
A method for the recovery of the real space line-of-sight mass density field from Lyman absorption in QSO spectra is presented. The method makes use of a Lucy-type algorithm for the recovery of the HI density.
Haehnelt, Martin, Nusser, Adi
core   +1 more source

On the Lightweight Potential of Laser Additive Manufactured NiTi Triply Periodic Minimal Sheet Lattices

Advanced Engineering Materials, EarlyView.
This study explores the lightweight potential of laser additive‐manufactured NiTi triply periodic minimal surface sheet lattices. It systematically investigates the effects of relative density and unit cell size on surface quality, deformation recovery, compression behavior, and energy absorption.
Haoming Mo, Shuo Qu, Shiming Gao, Xu Song   +3 more
wiley   +1 more source

The dark matter content of the blue compact dwarf NGC 2915

, 2010
NGC 2915 is a nearby blue compact dwarf with the HI properties of a late-type spiral. Its large, rotating HI disk (extending out to R ~ 22 B-band scale lengths) and apparent lack of stars in the outer HI disk make it a useful candidate for dark matter ...
Begeman, Bell, Bell, Binney, Bureau, Carignan, Casertano, Cote, Côté, de Blok, de Blok, de Blok, de Vaucouleurs, E. C. Elson, Flores, Karachentsev, Kennicutt, Koribalski, Kroupa, Leroy, Leroy, Marchesini, Masset, Mateo, Meurer, Meurer, Meurer, Moore, Moore, Navarro, Navarro, Navarro, Noordermeer, Oh, R. C. Kraan-Korteweg, Sandage, Sault, Schlegel, Skrutskie, Springel, Springel, Steer, Swaters, Swaters, Taylor, Trachternach, van Albada, van der Kruit, van der Marel, W. J. G. de Blok, Walter   +50 more
core   +1 more source

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

A Workflow to Accelerate Microstructure‐Sensitive Fatigue Life Predictions

Advanced Engineering Materials, EarlyView.
This study introduces a workflow to accelerate predictions of microstructure‐sensitive fatigue life. Results from frameworks with varying levels of simplification are benchmarked against published reference results. The analysis reveals a trade‐off between accuracy and model complexity, offering researchers a practical guide for selecting the optimal ...
Luca Loiodice, Krzysztof S. Stopka, Michael D. Sangid   +2 more
wiley   +1 more source

Source Reconstruction as an Inverse Problem [PDF]

, 2000
Inverse Problem techniques offer powerful tools which deal naturally with marginal data and asymmetric or strongly smoothing kernels, in cases where parameter-fitting methods may be used only with some caution. Although they are typically subject to some
Coleman, Iain J., Gray, Norman
core   +2 more sources

New Interstellar Dust Models Consistent with Extinction, Emission, and Abundance Constraints

, 2003
We present new interstellar dust models which have been derived by simultaneously fitting the far-ultraviolet to near-infrared extinction, the diffuse infrared (IR) emission and, unlike previous models, the elemental abundance constraints on the dust for
Backus G. E., Colangeli L., Desert F. X., Eli Dwek, Leger A., Lehtinen K., Li A., Lutz D., Mathis J. S., Morgan D. H., Narayan R., Ossenkopf V., Richard G. Arendt, Schutte W. A., Stognienko R., Viktor Zubko, Warren S. G., Zubko V. G., Zubko V. G., Zubko V. G.   +19 more
core   +2 more sources

Multimodal Mechanical Testing of Additively Manufactured Ti6Al4V Lattice Structures: Compression, Bending, and Fatigue

Advanced Engineering Materials, EarlyView.
In this experimental study, the mechanical properties of additively manufactured Ti‐6Al‐4V lattice structures of different geometries are characterized using compression, four point bending and fatigue testing. While TPMS designs show superior fatigue resistance, SplitP and Honeycomb lattice structures combine high stiffness and strength. The resulting
Klaus Burkart, Jonas Schmidt, Anastasiya Toenjes, Johanna Eisenträger   +3 more
wiley   +1 more source