Results 81 to 90 of about 872,163 (296)

Optical geometry for gravitational collapse and Hawking radiation

, 2000
The notion of optical geometry, introduced more than twenty years ago as a formal tool in quantum field theory on a static background, has recently found several applications to the study of physical processes around compact objects.
A. Gupta, C. W. Misner, D. G. Boulware, D. G. Boulware, G. Cognola, G. F. Torres del Castillo, G. W. Gibbons, H. Bondi, J. D. Bekenstein, J. D. Bekenstein, J. R. Oppenheimer, J. S. Dowker, Joachim Almergren, K. S. Thorne, K. S. Thorne, M. A. Abramowicz, M. A. Abramowicz, M. A. Abramowicz, M. A. Abramowicz, M. A. Abramowicz, M. A. Abramowicz, M. A. Abramowicz, M. A. Abramowicz, M. A. Abramowicz, M. A. Abramowicz, M. A. Abramowicz, Marek A. Abramowicz, N. D. Birrell, P. C. W. Davies, P. C. W. Davies, P. Candelas, R. Balbinot, R. Balbinot, R. Balbinot, R. D. Greene, R. M. Wald, R. M. Wald, S. A. Fulling, S. B. Gidding, S. B. Giddings, S. Kristiansson, S. Liberati, S. P. de Alwis, S. Sonego, S. Sonego, S. Sonego, S. W. Hawking, S. W. Hawking, S. W. Hawking, Sebastiano Sonego, T. Banks, T. Banks, T. Banks, U. H. Gerlach, V. Moretti, Y. Aharonov   +55 more
core   +1 more source

An Inkjet‐Printed Platinum‐Based Temperature Sensing Element on Polyimide Substrates

Advanced Engineering Materials, EarlyView.
An inkjet‐printed, meander‐structured, nanoparticle platinum‐based resistive temperature sensors on polyimide substrates are demonstrated as proof‐of‐concept. Optimized sintering at 250°C enables stable conductive structures. The Pt100‐ and Pt1000‐type sensors exhibit linear resistance–temperature characteristics with stable TCR in the 20°C–80°C range,
Shawon Alam, Thomas Kister, Alexander Scholz, Sophie Sauva, Makara Lay, Tobias Kraus, Jasmin Aghassi‐Hagmann   +6 more
wiley   +1 more source

Enabling Digital Continuity in Virtual Manufacturing for Eco‐Efficiency Assessment of Lightweight Structures by Means of a Domain‐Specific Structural Mechanics Language: Requirements, Idea and Proof of Concept

Advanced Engineering Materials, EarlyView.
This article presents a solver‐agnostic domain‐specific language (DSL) for computational structural mechanics that strengthens interoperability in virtual product development. Using a hierarchical data model, the DSL enables seamless exchange between diverse simulation tools and numerical methods.
Martin Rädel, Andreas Schuster, Felix Schoenitz, Jean Lefèvre   +3 more
wiley   +1 more source

Analyzing Cutting Temperature in Hard-Turning Technique with Standard Inserts Through Both Simulation and Experimental Investigations

Applied Sciences
The cutting temperature in hard turning is extremely high, which reduces tool life, lowers machined-surface quality, and affects dimensional control.
Pham Minh Duc, Le Hieu Giang, Van Thuc Nguyen   +2 more
doaj   +1 more source

Optimizing Post Friction Stir Welding Heat Treatment in Dissimilar Friction Stir Welded 6061/AlSi10MgMn Joints for Electrical Vehicle Battery Housing

Advanced Engineering Materials, EarlyView.
Microstructural evolution and hardness optimization along the cross‐section of friction stir welded AA6061/AlSi10MgMn joints, for electric vehicle battery housings, were investigated. Postweld aging between 170°C and 220°C enhances hardness uniformity within the nugget zone.
Emanuele Ghio, Emanuela Cerri
wiley   +1 more source

Ultrasonic Polishing [PDF]

, 1993
The ultrasonic polishing process makes use of the high-frequency (ultrasonic) vibrations of an abradable tool which automatically conforms to the work piece and an abrasive slurry to finish surfaces and edges on complex, highly detailed, close tolerance ...
Gilmore, Randy
core   +1 more source

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

Drawing dynamic geometry figures online with natural language for junior high school geometry

International Review of Research in Open and Distributed Learning, 2012
This paper presents a tool for drawing dynamic geometric figures by understanding the texts of geometry problems. With the tool, teachers and students can construct dynamic geometric figures on a web page by inputting a geometry problem in natural ...
Wing-Kwong Wong, Sheng-Kai Yin, Chang-Zhe Yang   +2 more
doaj   +1 more source

From conjecture generation by maintaining dragging to proof

, 2016
In this paper we propose a hypothesis about how different uses of maintaining dragging, either as a physical tool in a dynamic geometry environment or as a psychological tool for generating conjectures can influence subsequent processes of proving ...
Antonini, Samuele, Baccaglini-Frank, Anna   +1 more
core  

Interpolation in non-positively curved K\"ahler manifolds

, 2001
We extend to any simply connected K\"ahler manifold with non-positive sectional curvature some conditions for interpolation in $\mathbb{C}$ and in the unit disk given by Berndtsson, Ortega-Cerd\`a and Seip.
B. Berndtsson, Christophe Mourougane, H.H. Wu, I. Chavel, J. Ortega-Cerdà, J.-P. Demailly, K. Seip, L. Manivel, R.E. Greene, S. Kobayashi, Y.T. Siu   +10 more
core   +2 more sources