Results 101 to 110 of about 115,105,043 (204)

The companion equations and the moyal-nahm equations [PDF]

open access: yes, 2000
The first part of this thesis is concerned with the companion equations. These are equations of motion for the companion Lagrangian which is proposed to be the Lagrangian for a field theory associated with strings and branes, similar to the Klein-Gordon ...
Baker, Linda Margaret
core  

A Simplified Laminar Flow Model for the Pultrusion of Glass Fiber/Polyethylene Terephthalate Commingled Yarns

open access: yesAdvanced Engineering Materials, EarlyView.
A simplified thermoplastic pultrusion model is developed to predict thermal fields in glass fiber/polyethylene terephthalate (GF/PET) composites with reduced computational cost. By combining effective material homogenization, validation against literature data, and Gaussian‐process‐based optimization, the study reveals how heating limits, pulling speed,
Elder Soares   +3 more
wiley   +1 more source

From regular to irregular: a unified origin for Argyres-Douglas theories

open access: yesJournal of High Energy Physics
We propose that Argyres-Douglas theories of type D p (SU(N)) and (A p−1 , A N−1) — both realizable as Type A class $$\mathcal{S}$$ theories with irregular punctures — can be obtained via a sequence of mass deformations from a common ancestor: a class ...
Simone Giacomelli   +3 more
doaj   +1 more source

Fostering Innovation: Streamlining Magnetocaloric Materials Research by Digitalization

open access: yesAdvanced Engineering Materials, EarlyView.
Magnetocaloric cooling (MCE) is an environmentally friendly refrigeration method with great potential. Optimizing MCE materials involves the preparation and screening of large quantities of samples, which in turn generates a large amount of data. A digitalization approach is presented that uses ontologies, knowledge graphs, and digital workflows to ...
Simon Bekemeier   +17 more
wiley   +1 more source

A Manual for Conformal Field Theories in 4D [PDF]

open access: yes, 2017
This thesis conducts an investigation of four dimensional conformal field theories (CFT). With the application of the bootstrap techniques in mind, we set out to compute the conformal partial waves (CPW) needed to bootstrap a generic four-point function
El Khidir Osman, Emtinan Salah El-Din
core  

All class S $$ \mathcal{S} $$ theories of type-A originate from orbi-instantons

open access: yesJournal of High Energy Physics
A surprising relation between 4d N $$ \mathcal{N} $$ = 2 class S $$ \mathcal{S} $$ superconformal field theories of Type-A and 6d N $$ \mathcal{N} $$ = (1, 0) orbi-instanton theories is investigated.
Simone Giacomelli   +3 more
doaj   +1 more source

Is an Apple an Orange? A Large Language Model Benchmark for Candidate Term Extraction and Subclass Decisions Against Upper Ontologies in Engineering and Materials Science

open access: yesAdvanced Engineering Materials, EarlyView.
Building machine‐readable vocabularies for materials science is slow, expert‐driven work. This study benchmarks 13 large language models on two of its first steps: finding candidate terms in engineering articles and deciding where they belong in a class hierarchy.
Thomas Bjarsch   +3 more
wiley   +1 more source

The hamiltonian Lie algebroids of field theories

open access: yes, 2017
I will report on progress of a joint project with Alan Weinstein in which we try to understand the initial value constraints of field theories with external symmetries as momenta of a Lie algebroid action on the presymplectic manifold of fields.
Blohmann, Christian
core   +1 more source

Symbolic Regression and Multi‐Objective Optimization of the Flory–Huggins Interaction Parameter for Hydrogels

open access: yesAdvanced Engineering Materials, EarlyView.
We develop a data‐driven method to derive the mathematical expressions of the Flory–Huggins interaction parameter χ for the swelling behavior of temperature–responsive hydrogels. Starting from initial assumptions of χ, our workflow combines Bayesian optimization, Flory–Rehner theory, and symbolic regression to generate candidate χ expressions.
Yawen Wang   +2 more
wiley   +1 more source

A note on non-Lorentzian duality symmetries

open access: yesJournal of High Energy Physics
We work out non-Lorentzian dual actions for electromagnetism and linearised gravity, both in the Carrollian and Galilean cases. This is done in the same way as for Lorentzian theories, by first constructing a parent action that reduces to a pair of dual ...
Josh A. O’Connor, Simon Pekar
doaj   +1 more source

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