Search results for " Time"

Mothers’ non-standard working schedules and family time : enhancing regularity and togetherness

2016

Purpose – The purpose of this paper is to investigate Finnish working mothers’ experiences of the effects of non-standard working schedules (NSWS) on family time in two family forms, coupled and lone-parent families. Furthermore the aim is to find out what meanings mothers with NSWS attached to family time paying particular attention to the circumstances in which mothers experienced NSWS positively. Design/methodology/approach – Thematic analysis of 20 semi-structured interviews was used to investigate mothers’ experiences of the effects of NSWS on family time. Findings – The key factor generating positive experiences was the ability to maintain regularity and togetherness, which was enhan…

A beam search algorithm for minimizing crane times in premarshalling problems

2022

The premarshalling problem consists of sorting the containers placed in a bay of the container yard so that they can be retrieved in the order in which they will be required. We study the premarshalling problem with crane time minimization objective and develop a beam search algorithm, with some new elements adapted to the characteristics of the problem, to solve it. We propose various evaluation criteria, depending on the type of container movement, for its local evaluation; a new heuristic algorithm including local search for blue its global evaluation; and several new dominance rules. The computational study shows the contribution of each new element. The performance of the complete algo…

Effects of a progressive aquatic resistance exercise program on the biomechanical composition and morphology of cartilage in women with mild knee ost…

2013

Background. Symptoms associated with osteoarthritis of the knee result in decreased function, loss of working capacity and extensive social and medical costs. There is a need to investigate and develop effective interventions to minimise the impact of and even prevent the progression of osteoarthritis. Aquatic exercise has been shown to be effective at reducing the impact of osteoarthritis. The purpose of this article is to describe the rationale, design and intervention of a study investigating the effect of an aquatic resistance exercise intervention on cartilage in postmenopausal women with mild knee osteoarthritis. Methods. A minimum of 80 volunteers who meet the inclusion criteria will…

Alternatīvi BI risinājumi

2018

Lielie dati ir nopietns drauds tradicionālo datubāžu ātrdarbībai. Biznesa inteliģences rīkiem ir nepieciešamas ātras datubāzes, lai varētu veikt datu analīzi pēc iespējas tuvāk reāllaika analīzei. Tāpēc ir nepieciešams izpētī alternatīvu BI risinājumiem. Darba mērķis ir izpētīt un noskaidrot iespējas, ko sniedz mūsdienīgās datubāžu pārvaldības sistēmas salīdzinājuma ar tradicionālajām datubāžu pārvaldības sistēmām un vai ieguvumi ir pietiekami būtiski, lai in-memory datubāzes ieteiktu izmantot uzņēmumiem. Šī darba ietvaros tika veikta literatūras izpēte saistībā ar biznesa inteliģenci, pašreizējajām problēmām tajā un iespējamiem alternatīvu veidiem, kā problēmas var risināt. Kā arī, tika ve…

A Numbers-Based Approach to a Free Particle's Spacetime

2020

A possibility is proposed to define the proper spacetime of a free nonzerorest- mass m_0 particle based on the connection of its lasting proper time to an open sequence of natural numbers counting de Broglie time periods (h/c^2)(m^(-1)_ 0 ) [see R. Ferber, A Missing Link: What is Behind de Broglie's" Periodic Phenomenon"?, Foundations of Physics Letters 9, 575 (1996)]. It is suggested to define a set of twodirectional intervals of the particle's proper space (proper distances) following the construction of positive and negative integers from the ordered pairs of the natural numbers, which belong to the sequence 1, 2, ..., n defining the elapsed interval of de Broglie time t_n. Corresponding…

Search for heavy neutrinos with the T2K near detector ND280

2019

This paper reports on the search for heavy neutrinos with masses in the range 140<MN<493  MeV/c2 using the off-axis near detector ND280 of the T2K experiment. These particles can be produced from kaon decays in the standard neutrino beam and then subsequently decay in ND280. The decay modes under consideration are N→ℓ±απ∓ and N→ℓ+αℓ−β(−)ν(α,β=e,μ). A search for such events has been made using the Time Projection Chambers of ND280, where the background has been reduced to less than two events in the current dataset in all channels. No excess has been observed in the signal region. A combined Bayesian statistical approach has been applied to extract upper limits on the mixing elements of heav…

Robust delay-dependent H∞ control of uncertain time-delay systems with mixed neutral, discrete, and distributed time-delays and Markovian switching p…

2011

Author's version of an article published in the journal: IEEE Transactions on Circuits and Systems I: Regular Papers. Also available from the publisher at: http://dx.doi.org/10.1109/tcsi.2011.2106090 The problem of robust mode-dependent delayed state feedback H ∞ control is investigated for a class of uncertain time-delay systems with Markovian switching parameters and mixed discrete, neutral, and distributed delays. Based on the LyapunovKrasovskii functional theory, new required sufficient conditions are established in terms of delay-dependent linear matrix inequalities for the stochastic stability and stabilization of the considered system using some free matrices. The desired control is …

Robust fault detection for switched systems with time-varying delay using delta operator approach

2014

Aesthetic Appeal and Visual Usability in Four Icon Design Eras

2016

Technological artefacts express time periods in their visual design. Due time, visual culture changes and thus affects the design of pictorial representations in technological products, such as icons in user interfaces. Previous research of temporal aspects in human-computer interaction has been focusing on particular interaction situations, but not on the effects of design eras on user experience. The influence of icon design styles of different eras on aesthetic and usability experiences was studied with the method of primed product comparisons. Affective preferences and their processing times were analysed in order to examine visual usability in terms of semantic distance and aesthetic a…

Discrete exterior calculus for photonic crystal waveguides

2022

The discrete exterior calculus (DEC) is very promising, though not yet widely used, discretization method for photonic crystal (PC) waveguides. It can be seen as a generalization of the finite difference time domain (FDTD) method. The DEC enables efficient time evolution by construction and fits well for nonhomogeneous computational domains and obstacles of curved surfaces. These properties are typically present in applications of PC waveguides that are constructed as periodic structures of inhomogeneities in a computational domain. We present a two-dimensional DEC discretization for PC waveguides and demonstrate it with a selection of numerical experiments typical in the application area. …