Search results for "TENS"
showing 10 items of 12157 documents
Flame-Retardant and Tensile Properties of Polyamide 12 Processed by Selective Laser Sintering
2022
This research was funded by the European Regional Development Fund within Measure 1.1.1.1 “Industry-Driven Research” of the Specific aid objective 1.1.1 “To increase the research and innovation capacity of scientific institutions of Latvia and their ability to attract external funding by investing in human resources and infrastructure” of the Operational Program “Growth and Employment” (Project No. 1.1.1.1/19/A/143). A.S. and A.Z. are grateful to funding received from the European Union Horizon 2020 Framework programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART2.
Effect of oil lamination between plasticized starch layers on film properties
2016
International audience; To reduce the hygroscopic character of biodegradable starch-based films, rapeseed oil was incorporated by lamination (starch-oil-starch 3-layers technique). The lipid lamination followed by starch solution casting step induced an emulsion type structure of dried films. Composite films are more opalescent and glossier than fatty free starch films. For all the films, structure is heterogeneous in the cross-section only. Adding fat induced a twice decrease of the tensile strength. Thermal gravimetry analysis did not show differences between films with and without oil. Lipid reduced the moisture absorption particularly at higher RH as well as the surface swelling index, …
Demo 39. Sustancias tensioactivas
2013
Objetivo: Demostrar el efecto sobre la tensión superficial de ciertos materiales.
DETERMINAZIONE DELLE TENSIONI RESIDUE IN GIUNTI FSW A T MEDIANTE METODO DEL CUT-COMPLIANCE
2009
In questo lavoro è stato applicato il metodo del cut-compliance (CC) per la determinzazione delle tensioni residue in giunti friction stir welding (FSW) saldati con una forma T. È riconosciuto che il metodo del CC fornisce ottimi risultati per i giunti di testa la cui geometria è simile al provino CT per prove di fatica. In letteratura, tuttavia, non è presente alcuna applicazione di questo metodo a forme differenti da quelle del giunto di testa poiché non sono note le funzioni di peso e di forma per differenti geometrie. Per tale motivo, sono state effettuate delle simulazioni agli elementi finiti per stimare le funzioni di forma e di peso considerando la geometria dei giunti FSW saldati a…
Rationality, experiences or identity work? Sensemaking of emotionally tense experiences of organizational sustainability
2021
Purpose Although emotional tensions related to organizational sustainability have been identified, little is known about how employees aim to resolve such situations. This study aims to explore how employees use sensemaking to resolve emotionally tense situations concerning organizational sustainability. Design/methodology/approach The authors studied a case in which, while employees attached positive emotions to organizational sustainability, external stakeholders viewed it negatively. Specifically, the study analyzed how employees used sensemaking to resolve such tense experiences and how this sensemaking eventually influenced their actions. To this end, the authors interviewed 25 employ…
Obtención de células madre de la pulpa dental : caracterización y adaptación a diversas condiciones de oxígeno
2013
Uno de los retos actuales de las cirugías odontológicas es la regeneración ósea, especialmente del hueso alveolar para la realización del implante dental. En los últimos años, las células madre mesenquimales derivadas la pulpa dental (CMPDs), se han convertido en un objetivo de estudio prometedor para la regeneración ósea gracias a su potencial de diferenciación a odontoblastos y osteoblastos así como sus propiedades inmunológicas. Sin embargo, su aplicación sigue siendo limitada por el gran número de células y el tiempo requerido para su obtención. Para ello, nos propusimos el objetivo de optimizar el tiempo de obtención de las CMPDs en la condición fisiológica de oxígeno (3-6% O2) así com…
Deriving electrophysiological brain network connectivity via tensor component analysis during freely listening to music
2020
Recent studies show that the dynamics of electrophysiological functional connectivity is attracting more and more interest since it is considered as a better representation of functional brain networks than static network analysis. It is believed that the dynamic electrophysiological brain networks with specific frequency modes, transiently form and dissolve to support ongoing cognitive function during continuous task performance. Here, we propose a novel method based on tensor component analysis (TCA), to characterize the spatial, temporal, and spectral signatures of dynamic electrophysiological brain networks in electroencephalography (EEG) data recorded during free music-listening. A thr…
The Tucker tensor decomposition for data analysis: capabilities and advantages
2022
Tensors are powerful multi-dimensional mathematical objects, that easily embed various data models such as relational, graph, time series, etc. Furthermore, tensor decomposition operators are of great utility to reveal hidden patterns and complex relationships in data. In this article, we propose to study the analytical capabilities of the Tucker decomposition, as well as the differences brought by its major algorithms. We demonstrate these differences through practical examples on several datasets having a ground truth. It is a preliminary work to add the Tucker decomposition to the Tensor Data Model, a model aiming to make tensors data-centric, and to optimize operators in order to enable…
Multi-domain Features of the Non-phase-locked Component of Interest Extracted from ERP Data by Tensor Decomposition
2020
The waveform in the time domain, spectrum in the frequency domain, and topography in the space domain of component(s) of interest are the fundamental indices in neuroscience research. Despite the application of time–frequency analysis (TFA) to extract the temporal and spectral characteristics of non-phase-locked component (NPLC) of interest simultaneously, the statistical results are not always expectedly satisfying, in that the spatial information is not considered. Complex Morlet wavelet transform is widely applied to TFA of event-related-potential (ERP) data, and mother wavelet (which should be firstly defined by center frequency and bandwidth (CFBW) before using the method to TFA of ERP…
Sparse nonnegative tensor decomposition using proximal algorithm and inexact block coordinate descent scheme
2021
Nonnegative tensor decomposition is a versatile tool for multiway data analysis, by which the extracted components are nonnegative and usually sparse. Nevertheless, the sparsity is only a side effect and cannot be explicitly controlled without additional regularization. In this paper, we investigated the nonnegative CANDECOMP/PARAFAC (NCP) decomposition with the sparse regularization item using l1-norm (sparse NCP). When high sparsity is imposed, the factor matrices will contain more zero components and will not be of full column rank. Thus, the sparse NCP is prone to rank deficiency, and the algorithms of sparse NCP may not converge. In this paper, we proposed a novel model of sparse NCP w…