Results 81 to 90 of about 3,753,549 (263)

Operator equations and weighted shifts

open access: yesJournal of Mathematical Analysis and Applications, 1978
(The symbolic functional notation will be used in all that follows, regardless of whether or not the elements of H2(w) are actually functions.) The linear operator U may be extended to a closed, densely defined linear transformation U, on H2(w). It is a well known fact (see Halmos [3, p. 491) that lJ, is bounded iff +%+1/%1&0 is a bounded sequence.
openaire   +3 more sources

INDEX COMPUTATION OF SOME BISINGULAR OPERATORS WITH SHIFT BY HOMOTOPY METHOD

open access: yesВестник Донского государственного технического университета, 2018
The work continues to research the insufficiently explored problem of bisingular operators with shift index. It considers new cases of index computation of the bisingular operators with indisintegrative involutive shift by the homotopy method.
S. V. EFIMOV
doaj  

INDEX COMPUTATION OF SOME BISINGULAR OPERATORS WITH SHIFT BY HOMOTOPY METHOD

open access: yesAdvanced Engineering Research, 2010
The work continues to research the insufficiently explored problem of bisingular operators with shift index. It considers new cases of index computation of the bisingular operators with indisintegrative involutive shift by the homotopy method.
S. V. EFIMOV
doaj  

On the Wigner-Racah Algebra of the Group SU(2) in a Non-Standard Basis

open access: yes, 1998
The algebra su(2) is derived from two commuting quon algebras for which the parameter q is a root of unity. This leads to a polar decomposition of the shift operators of the group SU(2).
Kibler, M. R.
core   +1 more source

Can varying the number of teams in a shift schedule constitute a preventive strategy?

open access: yesRevista de Saúde Pública, 2004
OBJECTIVE: The study examines the implications for shiftworkers of applying different numbers of teams in the organization of shiftwork. METHODS: The participating operators came from five different companies applying continuous shift rotation systems ...
Hans Jeppe Jeppesen   +2 more
doaj   +1 more source

HUBUNGAN ANTARA SHIFT KERJA DENGAN KELELAHAN KERJA SUBYEKTIF PADA PENJAGA WARNET DI KELURAHAN SEKARAN

open access: yesUnnes Journal of Public Health, 2015
The purpose of this research is to determine the relationship between work shift and subjective fatigue of work at internet cafe operators in Sekaran. Shift work can affect variety of physical and psychological changes in the people including fatigue ...
. Muvarichin
doaj   +1 more source

Nabla derivatives associated with nonlinear control systems on homogeneous time scales

open access: yesNonlinear Analysis, 2016
The backward shift and nabla derivative operators, defined by the control system on homogeneous time scale, in vector spaces of one-forms and vector fields are introduced and some of their properties are proven.
Zbigniew Bartosiewicz   +5 more
doaj   +1 more source

On the Complete Indeterminacy and the Chaoticity of the Generalized Heun Operator in Bargmann Space

open access: yesAxioms
In 1998, we gave a complete scattering analysis of the cubic Heun operator H=a∗(a+a∗)a acting on Bargmann space, where a and a∗ are the standard Bose annihilation and creation operators satisfying the commutation relation [a,a∗]=I.
Abdelkader Intissar
doaj   +1 more source

Discomfort Analysis in Computerized Numeric Control Machine Operations

open access: yesSafety and Health at Work, 2012
Objectives: The introduction of computerized numeric control (CNC) technology in manufacturing industries has revolutionized the production process, but there are some health and safety problems associated with these machines.
Krishnamoorthy Muthukumar   +2 more
doaj   +1 more source

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