Results 31 to 40 of about 1,726,292 (286)

Mathematical structure and physical content of composite gravity in weak-field approximation

open access: yes, 2020
The natural constraints for the weak-field approximation to composite gravity, which is obtained by expressing the gauge vector fields of the Yang-Mills theory based on the Lorentz group in terms of tetrad variables and their derivatives, are analyzed in
Öttinger, Hans Christian
core   +1 more source

Statistical field theory for simple fluids: the collective variables representation

open access: yes, 2005
An alternative representation of an exact statistical field theory for simple fluids, based on the method of collective variables, is presented. The results obtained are examined from the point of another version of theory that was developed recently by ...
Bohm   +28 more
core   +1 more source

Magnitude and crystalline anisotropy of hole magnetization in (Ga,Mn)As [PDF]

open access: yes, 2006
Theory of hole magnetization Mc in zinc-blende diluted ferromagnetic semiconductors is developed relaxing the spherical approximation of earlier approaches. The theory is employed to determine Mc for (Ga,Mn)As over a wide range of hole concentrations and
C. Śliwa   +4 more
core   +1 more source

On optimum multi‐input multi‐output radar signal design: Ambiguity function, manifold structure and duration‐bandwidth

open access: yesIET Signal Processing, 2021
A design technique is developed for the probing signals of a Multi‐Input Multi‐Output (MIMO) radar. The concentration of the energy of the signal in its essential duration and essential bandwidth is achieved through the use of a class of time‐frequency ...
Yuqing Liu   +3 more
doaj   +1 more source

A Theory of Cheap Control in Embodied Systems

open access: yes, 2014
We present a framework for designing cheap control architectures for embodied agents. Our derivation is guided by the classical problem of universal approximation, whereby we explore the possibility of exploiting the agent's embodiment for a new and more
B Sallans   +43 more
core   +5 more sources

Why Matrix theory works for oddly shaped membranes [PDF]

open access: yes, 2001
We give a simple proof of why there is a Matrix theory approximation for a membrane shaped like an arbitrary Riemann surface. As corollaries, we show that noncompact membranes cannot be approximated by matrices and that the Poisson algebra on any compact
A. P. Polychronakos   +14 more
core   +2 more sources

Personalizing the Pediatric Hematology/Oncology Fellowship: Adapting Training for the Next Generation

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT The pediatric hematology‐oncology fellowship training curriculum has not substantially changed since its inception. The first year of training is clinically focused, and the second and third years are devoted to scholarship. However, this current structure leaves many fellows less competitive in the current job market, resulting in ...
Scott C. Borinstein   +3 more
wiley   +1 more source

Stochastic quantization of the linearized gravitational field [PDF]

open access: yes, 1982
Stochastic field equations for linearized gravity are presented. The theory is compared with the usual quantum field theory and questions of Lorentz covariance are discussed.
Davidson, Mark P.
core   +2 more sources

Stereotactic Body Radiation Therapy for Pediatric, Adolescent, and Young Adult Patients With Osteosarcoma: Local Control Outcomes With Dosimetric Analysis

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background/Objectives Osteosarcoma is a radioresistant tumor that may benefit from stereotactic body radiation therapy (SBRT) for locoregional control in metastatic/recurrent disease. We report institutional practice patterns, outcomes, toxicity, and failures in osteosarcoma patients treated with SBRT.
Jenna Kocsis   +13 more
wiley   +1 more source

Accuracy Assessment of LiDAR-Derived Digital Elevation Models Based on Approximation Theory

open access: yesRemote Sensing, 2015
The cumulative error at a point in a LiDAR-derived DEM consists of three components: propagated LiDAR-sensor error, propagated ground error, and interpolation error.
XiaoHang Liu, Hai Hu, Peng Hu
doaj   +1 more source

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