Results 101 to 110 of about 129,282 (240)

Gauge fixing and the Hamiltonian for cylindrical spacetimes

, 2000
We introduce a complete gauge fixing for cylindrical spacetimes in vacuo that, in principle, do not contain the axis of symmetry. By cylindrically symmetric we understand spacetimes that possess two commuting spacelike Killing vectors, one of them ...
A. Ashtekar, A. Ashtekar, A. Ashtekar, A. Ashtekar, A. Einstein, A. Papapetrou, A. Vilenkin, A.S. Kompaneets, B. Carter, B. Linet, B.K. Berger, C.G. Torre, D. Harari, D. Kramer, G. Beck, G.A. Mena Marugán, Guillermo A. Mena Marugán, J. Carot, J. Samuel, J.D. Romano, J.R. Gott, K. Kuchař, K.S. Thorne, M. Henneaux, M. Varadarajan, P. Jordan,, P.A.M. Dirac, P.O. Mazur, P.O. Mazur, R. Geroch, R.M. Wald, S. Deser, S.A. Hayward, S.W. Hawking, W. Kundt, W.A. Hiscock   +35 more
core   +1 more source

Enhancing generalizability theory with mixed‐effects models for heteroscedasticity in psychological measurement: A theoretical introduction with an application from EEG data

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Generalizability theory (G‐theory) defines a statistical framework for assessing measurement reliability by decomposing observed variance into meaningful components attributable to persons, facets, and error. Classic G‐theory assumes homoscedastic residual variances across measurement conditions, an assumption that is often violated in ...
Philippe Rast, Peter E. Clayson
wiley   +1 more source

Variance Matrix Priors for Dirichlet Process Mixture Models With Gaussian Kernels

International Statistical Review, EarlyView.
Summary Bayesian mixture modelling is widely used for density estimation and clustering. The Dirichlet process mixture model (DPMM) is the most popular Bayesian non‐parametric mixture modelling approach. In this manuscript, we study the choice of prior for the variance or precision matrix when Gaussian kernels are adopted.
Wei Jing, Michail Papathomas, Silvia Liverani   +2 more
wiley   +1 more source

Regulating via Conditionality: The Instruments of the New Industrial Policy

Regulation &Governance, EarlyView.
ABSTRACT Conditionality was a central concern in the development literature of the 1990s. With the significant expansion of targeted public support to private firms since the Great Financial Crisis, the issue of conditionality has once again become a focal point in industrial policy debates.
Fabio Bulfone, Timur Ergen, Erez Maggor
wiley   +1 more source

Proprioceptive integration in motor control

The Journal of Physiology, EarlyView.
Abstract figure legend A virtual reality (VR)‐based reaching task reveals how proprioceptive feedback affects the perceived and actual movement speed of active movements, as well as the perceived hand position. When an antagonist vibration was applied, subjects tended to overestimate their movement speed while also decreasing their actual movement ...
Erik Skjoldan Mortensen, Mark Schram Christensen   +1 more
wiley   +1 more source

Programmable non-Hermitian photonic quantum walks via dichroic metasurfaces

APL Photonics
The evolution of a closed quantum system is described by a unitary operator generated by a Hermitian Hamiltonian. However, when certain degrees of freedom are coupled to an environment, the relevant dynamics can be captured by non-unitary evolution ...
Paola Savarese, Sarvesh Bansal, Maria Gorizia Ammendola, Lorenzo Amato, Raouf Barboza, Bruno Piccirillo, Francesco Di Colandrea, Lorenzo Marrucci, Filippo Cardano   +8 more
doaj   +1 more source

A Novel Approach to the Design and Sample Size Planning of Animal Experiments Based on Effect Estimation

Biometrical Journal, Volume 68, Issue 2, April 2026.
ABSTRACT Animal experiments are often purely exploratory, with little to no data available to support the planning phase. Nonetheless, ethical guidelines demand scientifically sound planning, particularly regarding sample size determination based on biometric criteria such as power analysis or precision of effect estimation.
Dario Zocholl, Henrike Solveen, Matthias Schmid   +2 more
wiley   +1 more source

Institutionalisation and Institutional Evolution: A Model of Selecting Government Officials in Ancient China

Economics of Transition and Institutional Change, Volume 34, Issue 2, Page 359-367, April 2026.
ABSTRACT The evolution of institutions in selecting government officials in ancient China reflected efficiency considerations and increased power concentration in the hands of the ruler. Selecting government officials in ancient China became more rule‐based over time, and standardisation and centralisation were some key features of this process.
Haiwen Zhou
wiley   +1 more source

Tensor Hypercontraction Error Correction Using Regression

Journal of Computational Chemistry, Volume 47, Issue 8, 30 March 2026.
The combination of tensor hypercontraction with machine learning bridges the gap between accuracy and computational efficiency through scaling reduction. ABSTRACT Wavefunction‐based quantum methods are some of the most accurate tools for predicting and analyzing the electronic structure of molecules, in particular for accounting for dynamical electron ...
Ishna Satyarth, Eric C. Larson, Devin A. Matthews   +2 more
wiley   +1 more source

Implementation of a multi-terminal quantum sorter in solid state systems

Scientific Reports
Identifying quantum states stands at the core of quantum information processing. However, an accurate observable measurement can pose a tough challenge whenever multiple outcomes are possible, e.g. measuring momentum vs.
Amanda Teodora Preda, Iulia Ghiu, Lucian Ion, Ulrich Wulf, Andrei Manolescu, George Alexandru Nemnes   +5 more
doaj   +1 more source