Search results for "PROB"

1,5-3 gadus vecu bērnu ekrānierīču lietošanas paradumu saistība ar temperamentu, uzvedības problēmām, māšu audzināšanas pieeju, māšu ekrānierīču liet…

2021

Maģistra darba mērķis bija izpētīt, kāda ir 1,5–3 gadus vecu bērnu ekrānierīču lietošanas paradumu saistība ar temperamentu, uzvedības problēmām, māšu audzināšanas pieeju, māšu ekrānierīču lietošanas paradumiem un māšu attieksmi pret bērnu ekrānierīču lietošanu. Pētījumā piedalījās 96 bērnu mātes, kurām ir bērni vecumā no 1,5 līdz 3 gadiem. Bērnu vidējais vecums ir 2,43 gadi. Lai izvērtētu bērna uzvedību pēdējo 6 mēnešu laikā, tika izmantota Bērna uzvedības novērtēšanas aptauja vecākiem (Child Behavior Checklist (CBCL/ 1 ½ - 5) paredzēta 1,5–5 g.v. bērnu aprūpētājiem, kuri bērnu var novērot mājas situācijā. Aptaujas standartizāciju veica I. Skreitule – Pikše, M. Raščevska, S. Sebre, A. Koļe…

Mātes audzināšanas pieeju saistība ar vecāku kompetences izjūtu un bērnu uzvedību audžuģimenēs un bioloģiskajās ģimenēs.

2019

Pētījuma mērķis bija pētīt, vai pastāv atšķirības un saistības starp mātes audzināšanas pieejām ar vecāku kompetences izjūtu un bērnu uzvedības problēmām audžuģimenēs un bioloģiskajās ģimenēs. Pētījumā piedalījās 64 mātes, kurām ir bērni vecumā no 8-18 gadiem, no kurām 32 bija audžumātes, bet 32 bija bioloģiskās mātes. Respondentiem bija jāaizpilda trīs aptaujas - Alabamas audzināšanas aptauja (The Alabama Parenting Questionnaire – Preschool Revision, (APQ-PR), Clerkin, Marks, Polikaro & Halperin, 2007), Vecāku kompetences izjūtas skala (Parenting Sense of Competence Scale (PSOC), Johnston & Mash, 1989) un Ahenbaha bērnu uzvedības novērtējuma anketa vecākiem (bērna vecums 6-18gadi) (Youth S…

Vecāku stress un audzināšanas uzvedības, un bērnu ar autiskā spektra traucējumiem trauksme un eksternalizētas uzvedības problēmas

2022

Pētījuma mērķis bija noskaidrot, kādas attiecības pastāv bērnu ar autiskā spektra traucējumiem (AST) populācijā, starp vecāku stresu un audzināšanas uzvedībām, un bērnu eksternalizētām uzvedības problēmām (EUP) un trauksmi. Papildus tam, pārbaudīt līdzšinējos pētījumos uzrādītās saistības starp trauksmi un EUP, kontrolējot bērna IQ un vecumu. Pētījumā piedalījās 61 vecāks, kas audzina skolas vecuma bērnu ar AST. Vecākiem tika lūgts atbildēt par bērna trauksmi un EUP, kā arī savu stresu un audzināšanas uzvedībām. Pētījumā tika izmantota bērnu trauksmes skala – autiskā spektra traucējumiem (ASC-ASD-P), Bērnu uzvedības novērtēšanas aptauja (CBCL/6-18), Vecāku stresa indeksa aptauja, īsā versij…

Vehicle routing problems with drones equipped with multi-package payload compartments

2022

The vehicle routing problem with drones (VRP-D) consists of designing combined truck-drone routes and schedules to serve a set of customers with specific requests and time constraints. In this paper, VRP-D is extended to include a fleet of drones equipped with multi-package payload compartments to serve more customers on a single trip. Moreover, a drone can return to a truck, different from the one from which it started, to swap its depleted battery and/or to pick up more packages. This problem, denoted as VRP-D equipped with multi-package payload compartments (VRP-D-MC), aims to maximize total profit. In this work, an adaptive multi-start simulated annealing (AMS-SA) metaheuristic algorith…

2021

Abstract Reliable patient-specific ventricular repolarization times (RTs) can identify regions of functional block or afterdepolarizations, indicating arrhythmogenic cardiac tissue and the risk of sudden cardiac death. Unipolar electrograms (UEs) record electric potentials, and the Wyatt method has been shown to be accurate for estimating RT from a UE. High-pass filtering is an important step in processing UEs, however, it is known to distort the T-wave phase of the UE, which may compromise the accuracy of the Wyatt method. The aim of this study was to examine the effects of high-pass filtering, and improve RT estimates derived from filtered UEs. We first generated a comprehensive set of UE…

A graph colouring model for assigning a heterogeneous workforce to a given schedule

1996

Abstract We analyze a heterogeneous workforce assignment problem in which the minimum number of workers required to carry out a machine load plan is calculated. The problem is formulated as a restricted vertex colouring problem and a branch and bound algorithm is presented. The special characteristics of the graph to be coloured allow an efficient implementation of the branch and bound. Computational results show that the algorithm can solve problems of 50 activities, 5, 10 and 15 machines and between 2 to 15 different types of workers in just a few seconds.

QSPR/QSAR Studies of 2-Furylethylenes Using Bond-Level Quadratic Indices and Comparison with Other Computational Approaches

2017

The recently introduced, non-stochastic and stochastic quadratic indices (Marrero-Ponce <em>et al. J. Comp. Aided Mol. Des.</em> 2006, 20, 685-701) were applied to QSAR/QSPR studies of heteroatomic molecules. These novel bond-based molecular descriptors (MDs) were used for the prediction of the partition coefficient (log P), and the antibacterial activity of 34 derivatives of 2-furylethylenes. Two statistically significant QSPR models using non-stochastic and stochastic bond-based quadratic indices were obtained (R<sup>2</sup> = 0.971, s = 0.137 and R<sup>2</sup> = 0.986, s = 0.096). These models showed good stability to data variation in leave-one-out (L…

The Potsdam Open Source Radio Interferometry Tool (PORT)

2021

The Potsdam Open Source Radio Interferometry Tool (PORT) is the very long baseline interferometry (VLBI) analysis software developed and maintained at the GFZ German Research Centre for Geosciences. Chiefly, PORT is tasked with the timely processing of VLBI sessions and post-processing activities supporting the generation of celestial and terrestrial reference frames. In addition, it serves as a framework for research and development within the GFZ's VLBI working group and is part of the tool set employed in educating young researchers. Starting out from VLBI group delays, PORT estimates station and radio sources positions, as well as Earth orientation parameters, tropospheric parameters, a…

Biophotonics in veterinary medicine: the first steps toward clinical translation

2019

In this paper, we analyzed the current situation and the potential of biophotonics and biomedical optics in veterinary medicine. Promising optical techniques such as optical coherence tomography, pulse oximeter, and hyperspectral imaging have been clinically translated into human medicine. But even though human and small animal medicine share personalized and state-of-the-art approach, biophotonics remains rarely exploited in the canine and feline medicine. However, there are some biophotonics studies in veterinary oncology which addressed tumor diagnosis (skin and subcutaneous tumors), prognosis (lymphoma), and therapy (clear surgical margins). Visible and near-infrared spectroscopy served…

An equivalent single-layer model for magnetoelectroelastic multilayered plate dynamics

2012

Abstract An equivalent single-layer model for the dynamic analysis of magnetoelectroelastic laminated plates is presented. The electric and magnetic fields are assumed to be quasi-static and the first-order shear deformation theory is used. The formulation of the model provides for a preliminary fulfillment of the electro-magnetic governing equations, which allows to determine the electric and magnetic potential as functions of the mechanical variables. Then, by using this result, the equations of motion are written leading to the problem governing equations. They involve the same terms of the elastic dynamic problem weighted by effective stiffness coefficients, which take the magneto-elect…