Search results for "Operator"

Ergonomiskie riski un veselības veicināšanas pasākumi degvielas uzpildes stacijās uzņēmumā Virši-A

2022

„Ergonomiskie riski un veselības veicināšanas pasākumi degvielas uzpildes stacijās uzņēmumā AS “Virši-A” ”. Darba autore: Ilva Lazorenko. Darba zinātniskais vadītājs: profesors Henrijs Kaļķis. Darbs izklāstīts uz 77 lpp., ietver 24 attēlus, 7 tabulas, 5 pielikumus, 45 informatīvos avotus. Maģistra darbs sastāv no 4 daļām. Pirmajā daļā ir apskatīta un analizēta literatūra par ergonomiskiem riskiem degvielas uzpildes staciju darbinieku darba procesā. Pētījuma otrajā daļā aprakstītas pētījumā pielietotās metodes, trešajā daļā - iegūto rezultātu analīze un rezultātu iztirzāšana, ceturtajā daļā izstrādāti veselības veicināšanas pasākumi. Pētījuma rezultāti par degvielas uzpildes staciju darbinie…

Stress in emergency telephone number operators during the COVID-19 pandemic: the role of self-efficacy and Big Five personality traits

2022

BackgroundEmergency telephone number operators experience many challenges in their work during the COVID-19 pandemic. Their personality traits and self-efficacy may act as important factors in their level of perceived stress. The aim of this study was to determine the relationship between Big Five personality traits, self-efficacy and perceived stress among emergency tele-phone number operators during the COVID-19 pandemic.Participants and procedureOne hundred emergency telephone number operators participated in the study. The Perceived Stress Scale (PSS-10), Ten Item Personality Inventory (TIPI) and Generalized Self Efficacy Scale (GSES) were used.ResultsEmergency telephone number operator…

Sakārtotie svārstīgie nestriktie Hamahera agregācijas operatori daudzkritēriju lēmumu pieņemšanā

2017

Bakalaura darba ir veltīts sakārtotie svārstīie nestriktie Hamahera agregācijas operatoru un to pielietojums daudzkritēriju lēmumu pieņemšanā. Darbā aprakstīti tādi jēdzieni, kā t-norma, t-konorma, involūcija, svārstīga nestrikta kopa, svārstīgu nestriktu elementu sakārtojums, kuri nepieciešami, lai definētu sakārtotu svārstīgo nestrikto agregācijas operatoru. Balstoties uz šiem operātoriem aprakstīts daudzkritēriju lēmumu pieņemšanas modelis, kas ilustrēts ar praktiskiem piemēriem.

Representing compact sets of compact operators and of compact range vector measures

1987

Gaussian plane and spherical means in separable Hilbert spaces

1982

Operator (Quasi-)Similarity, Quasi-Hermitian Operators and All that

2016

Motivated by the recent developments of pseudo-Hermitian quantum mechanics, we analyze the structure generated by unbounded metric operators in a Hilbert space. To that effect, we consider the notions of similarity and quasi-similarity between operators and explore to what extent they preserve spectral properties. Then we study quasi-Hermitian operators, bounded or not, that is, operators that are quasi-similar to their adjoint and we discuss their application in pseudo-Hermitian quantum mechanics. Finally, we extend the analysis to operators in a partial inner product space (pip-space), in particular the scale of Hilbert space s generated by a single unbounded metric operator.

Modal analysis for random response of MDOF systems

1990

The usefulness of the mode-superposition method of multidegrees of freedom systems excited by stochastic vector processes is here presented. The differential equations of moments of every order are written in compact form by means of the Kronecker algebra; then the method for integration of these equations is presented for both classically and non-classically damped systems, showing that the fundamental operator available for evaluating the response in the deterministic analysis is also useful for evaluating the response in the stochastic analysis.

Liftings and extensions of operators in Brownian setting

2020

We investigate the operators T on a Hilbert space H which have 2-isometric liftings S with the property S ∗ S H ⊂ H . We show that such liftings are closely related to some extensions of T, which h...

Explicit expressions for Sturm-Liouville operator problems

1987

Throughout this paper H will denote a complex separable Hilbert space and L(H) denotes the algebra of all bounded linear operators on H. If T lies in L(H), its spectrum σ(T) is the set of all complex numbers z such zI–T is not invertible in L(H) and its compression spectrum σcomp(T) is the set of all complex numbers z such that the range (zI-T)(H) is not dense in H ([3, p. 240]). This paper is concerned with the Sturm–Liouville operator problemwhere λ is a complex parameter and X(t), Q, Ei, Fi for i = l,2, and t∈[0,a], are bounded operators in L(H). For the scalar case, the classical Sturm-Liouville theory yields a complete solution of the problem, see [4], and [7]. For the finite-dimension…

Distribution of Large Eigenvalues for Elliptic Operators

2019

In this chapter we consider elliptic differential operators on a compact manifold and rather than taking the semi-classical limit (h →), we let h = 1 and study the distribution of large eigenvalues. Bordeaux Montrieux (Loi de Weyl presque sure et resolvante pour des operateurs differentiels non-autoadjoints, these, CMLS, Ecole Polytechnique, 2008. https://pastel.archives-ouvertes.fr/pastel-00005367, Ann Henri Poincare 12:173–204, 2011) studied elliptic systems of differential operators on S1 with random perturbations of the coefficients, and under some additional assumptions, he showed that the large eigenvalues obey the Weyl law almost surely. His analysis was based on a reduction to the s…