Results 81 to 90 of about 1,213,467 (327)

Natural extension of the Generalised Uncertainty Principle

, 2008
We discuss a gedanken experiment for the simultaneous measurement of the position and momentum of a particle in de Sitter spacetime. We propose an extension of the so-called generalized uncertainty principle (GUP) which implies the existence of a minimum
C Bambi, F R Urban, Perlmutter S, Riess A G, Scardigli F, Spergel D N, Stephani H   +6 more
core   +1 more source

New Sign Uncertainty Principles

, 2020
We prove new sign uncertainty principles which vastly generalize the recent developments of Bourgain, Clozel & Kahane and Cohn & Gonçalves, and apply our results to a variety of spaces and operators. In particular, we establish new sign uncertainty principles for Fourier and Dini series, the Hilbert transform, the discrete Fourier and Hankel ...
Felipe Gonçalves, Diogo Oliveira e Silva, João Pedro Ramos   +2 more
openaire   +4 more sources

Current Tracking Adaptive Control of Brushless DC Motors

International Journal of Adaptive Control and Signal Processing, EarlyView.
In this paper, the current tracking for Brushless Direct Current motors is approached considering uncertainty in the parameters of the motor's model. An adaptive control scheme to compensate electrical parameters uncertainty is proposed without requiring any knowledge of the mechanical parameters.
Fernanda Ramos‐García, Axel Coronado‐Andrade, Gerardo Espinosa‐Pérez, Luis Alvarez‐Icaza   +3 more
wiley   +1 more source

Erythropoietin, uncertainty principle and cancer related anaemia

BMC Cancer, 2002
Background This study was designed to evaluate if erythropoietin (EPO) is effective in the treatment of cancer related anemia, and if its effect remains unchanged when data are analyzed according to various clinical and methodological characteristics of ...
Bennett Charles L, Adams Jared R, Clark Otavio, Djulbegovic Benjamin   +3 more
doaj   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

A Generalized Uncertainty Principle in Quantum Gravity

, 1993
We discuss a Gedanken experiment for the measurement of the area of the apparent horizon of a black hole in quantum gravity. Using rather general and model-independent considerations we find a generalized uncertainty principle which agrees with a similar
Amati, Amati, Amati, Amati, Brill, Ciafaloni, Coleman, Gibbons, Gross, Gross, Gross, Hawking, Hawking, Konishi, Michele Maggiore, Preskill, Veneziano, Veneziano   +17 more
core   +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

The uncertainty principle and classical amplitudes

Journal of High Energy Physics
We study the variance in the measurement of observables during scattering events, as computed using amplitudes. The classical regime, characterised by negligible uncertainty, emerges as a consequence of an infinite set of relationships among multileg ...
Andrea Cristofoli, Riccardo Gonzo, Nathan Moynihan, Donal O’Connell, Alasdair Ross, Matteo Sergola, Chris D. White   +6 more
doaj   +1 more source

Uncertainty-principle noise in vacuum-tunneling transducers

, 1992
The fundamental sources of noise in a vacuum-tunneling probe used as an electromechanical transducer to monitor the location of a test mass are examined using a first-quantization formalism.
A. Papoulis, B. Yurke, C. M. Caves, E. Nelson, G. Kaminsky, H. van Kempen, K. A. Stephenson, K. S. Thorne, M. F. Bocko, M. F. Bocko, M. F. Bocko, R. A. Buser, R. Onofrio, R. Onofrio, S. Akamine   +14 more
core   +1 more source

On the Uncertainty Principle [PDF]

American Journal of Physics and Applications, 2016
Analysis of the laws which form, direct universe and of the interacting elements in the interactions emerging by these laws. Forming the theoretical, philosophical infrastructure of the some physical concepts and phenomena such as kinetic energy, uncertainty, length contraction, relative energy transformations, gravity, time and light speed to ...
openaire   +2 more sources