Results 21 to 30 of about 2,443,257 (268)
Quantum mechanics of higher derivative systems and total derivative terms [PDF]
, 1995 A general theory is presented of quantum mechanics of singular, non-autonomous, higher derivative systems. Within that general theory, $n$-th order and $m$-th order Lagrangians are shown to be quantum mechanically equivalent if their difference is a ...
e.g. Gitman D M +3 more
core +2 more sources
FROM SCHILLER'S 'TRILL' TO 'OIL' FROM RUSSIAN HYDROCARBONS
Вестник Российского экономического университета имени Г. В. Плеханова, 2017 In conditions of budget deficit and difficulties in capital borrowing on global markets the issue of home borrowing is becoming more and more acute. A derivative profitable both for the government and citizens, who keep their savings in Russian banks ...
Anatoliy I. Vorobiev, Pavel A. Gudkov
doaj +1 more source
On Higher Derivatives as Constraints in Field Theory: a Geometric Perspective [PDF]
, 2010 We formalize geometrically the idea that the (de Donder) Hamiltonian formulation of a higher derivative Lagrangian field theory can be constructed understanding the latter as a first derivative theory subjected to constraints.Comment: 7 ...
Bocharov A. V. +4 more
core +1 more source
Restoration of microhemodynamics on the human body surface using the fractional derivative of temperature oscillations [PDF]
Известия Саратовского университета. Новая серия: ФизикаBackground and Objectives: The possibility of restoring microhemodynamics on the human body surface was investigated through the analysis of skin temperature oscillation signals using integer and fractional order derivatives.
Sagaidachnyi, Andrey Aleksandrovich +7 more
doaj +1 more source
Frontiers in Oncology, 2021 Glioblastoma (GBM) is one of the most common primary and deadliest malignant brain tumor with chemoresistance and poor prognosis. There is a lack of effective chemotherapeutic drug for the treatment of GBM.
Hao Wang, Lei Shi, Zhimin Wang
doaj +1 more source
Covariant Derivatives on Null Submanifolds [PDF]
, 2011 The degenerate nature of the metric on null hypersurfaces makes it difficult to define a covariant derivative on null submanifolds. Recent approaches using decomposition to define a covariant derivative on null hypersurfaces are investigated, with ...
Dray, Tevian, Hickethier, Don
core +1 more source
Artificial Intelligence to Analyze the Cortical Thickness Through Age
Frontiers in Artificial Intelligence, 2021 In this study, Artificial Intelligence was used to analyze a dataset containing the cortical thickness from 1,100 healthy individuals. This dataset had the cortical thickness from 31 regions in the left hemisphere of the brain as well as from 31 regions ...
Sergio Ledesma +5 more
doaj +1 more source
A fractional spline collocation method for the fractional order logistic equation [PDF]
, 2017 We construct a collocation method based on the fractional B-splines to solve a nonlinear differential problem that involves fractional derivative, i.e. the fractional order logistic equation.
Pezza, L., Pitolli, F.
core +1 more source
Interpolated Derivatives [PDF]
Proceedings of the Edinburgh Mathematical Society, 1940 In a previous paper [Spain, Proc. Roy. Soc. Edinburgh, Vol. LX (1940), 134], I have shown that the application of the cardinal function to the problem of interpolating the derivatives yields the resultThis formula is valid for x > a (the constant of integration), and R(n) < 0. The analytical continuation for R(n) ≥ 0.
openaire +1 more source
Higher Derivative Terms in Three Dimensional Supersymmetric Theories [PDF]
, 2015 In this work, we systematically analyze higher derivative terms in the supersymmetric effective actions for three dimensional scalar field theories using $\mathcal{N} =1$ superspace formalism.
Awad, Adel, Faizal, Mir
core +2 more sources