Physical Review D, 2009 Theories of low-energy Lorentz violation by a fixed-norm "aether" vector field with two-derivative kinetic terms have a globally bounded Hamiltonian and are perturbatively stable only if the vector is timelike and the kinetic term in the action takes the
Carroll, Sean M. +3 more
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Comments on nonlinear sigma models coupled to supergravity
Physics Letters B, 2017 N=1, D=4 nonlinear sigma models, parametrized by chiral superfields, usually describe Kählerian geometries, provided that Einstein frame supergravity is used.
Sergio Ferrara, Massimo Porrati
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Application of a six sigma model to evaluate the analytical performance of urinary biochemical analytes and design a risk-based statistical quality control strategy for these assays: A multicenter study. [PDF]
J Clin Lab Anal, 2021 Liu Q +6 more
europepmc +2 more sources
Design of the 12-bit Delta-Sigma Modulator using SC Technique for Vibration Sensor Output Processing [PDF]
Radioengineering, 2012 The work deals with the design of the 12-bit Delta-Sigma modulator using switched capacitors (SC) technique. The modulator serves to vibration sensor output processing. The first part describes the Delta-Sigma modulator parameters definition.
M. Pavlik, V. Kledrowetz, J. Haze
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Cosmology of linear Higgs-sigma models with conformal invariance
Journal of High Energy Physics, 2021 We consider general linear Higgs-sigma models as ultra-violet completions of the Higgs inflation. We introduce general higher curvature terms beyond Einstein gravity and recast them into a class of linear Higgs-sigma models in the scalar-dual formulation
Hyun Min Lee, Adriana G. Menkara
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Junctions of mass-deformed nonlinear sigma models on SO(2N)/U(N) and Sp(N)/U(N). Part II
Journal of High Energy Physics, 2020 We construct three-pronged junctions of mass-deformed nonlinear sigma models on SO(2N)/U(N) and Sp(N )/U(N ) for generic N. We study the nonlinear sigma models on the Grassmann manifold or on the complex projective space.
Taegyu Kim, Sunyoung Shin
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New class of solutions in the non-minimal O(3)-sigma model
Physics Letters B, 2022 For the study of topological vortices with non-minimal coupling, we built a kind of non-canonical O(3)-sigma model, with a Maxwell term modified by a dielectric function.
F.C.E. Lima, C.A.S. Almeida
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Geodesics on Calabi-Yau manifolds and winding states in nonlinear sigma models
Frontiers in Physics, 2013 We conjecture that a non-flat D-real-dimensional compact Calabi-Yau manifold, such as a quintic hypersurface with D=6, or a K3 manifold with D=4, has locally length minimizing closed geodesics, and that the number of these with length less than L grows ...
Peng eGao, Michael R. Douglas
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Renormalization of supersymmetric Lifshitz sigma models
Journal of High Energy Physics, 2023 We study the renormalization of an N $$ \mathcal{N} $$ = 1 supersymmetric Lifshitz sigma model in three dimensions. The sigma model exhibits worldvolume anisotropy in space and time around the high-energy z = 2 Lifshitz point, such that the worldvolume ...
Ziqi Yan
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Tools for evaluating the performance of HbA1c analyzer: Sigma Metric and Quality Goal Index Ratio
International Journal of Medical Biochemistry, 2022 INTRODUCTION: Sigma metric model is one of the most popular quality management system tools used for Six Sigma process improvement. This model provides three features that improve the results: low inaccuracy, less deviation, and correct performance of ...
Yasemin Erdoğan Döventaş +1 more
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