Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Manuel Ortigueira"'
Publikováno v:
Computers, Vol 11, Iss 12, p 177 (2022)
Heart Rate Variability (HRV) is a biomarker that can be obtained non-invasively from the electrocardiogram (ECG) or the photoplethysmogram (PPG) fiducial points. However, the accuracy of HRV can be compromised by the presence of artifacts. In the her
Externí odkaz:
https://doaj.org/article/edaf70ae507b411e8cf48e0f52c28839
Autor:
Daniela Martins, Arnaldo Batista, Helena Mouriño, Sara Russo, Filipa Esgalhado, Catarina R. Palma dos Reis, Fátima Serrano, Manuel Ortigueira
Publikováno v:
Sensors, Vol 22, Iss 19, p 7638 (2022)
The electrohysterogram (EHG) is the uterine muscle electromyogram recorded at the abdominal surface of pregnant or non-pregnant woman. The maternal respiration electromyographic signal (MR-EMG) is one of the most relevant interferences present in an
Externí odkaz:
https://doaj.org/article/892bd6084af84884a67a1d17aca07e86
Publikováno v:
Symmetry, Vol 14, Iss 6, p 1139 (2022)
Heart Rate Variability (HRV) evaluates the autonomic nervous system regulation and can be used as a monitoring tool in conditions such as cardiovascular diseases, neuropathies and sleep staging. It can be extracted from the electrocardiogram (ECG) an
Externí odkaz:
https://doaj.org/article/b680e6576bec4b8c8661a3944bcb453b
Autor:
Müfit Şan, Arnaldo Batista, Sara Russo, Filipa Esgalhado, Catarina R. Palma dos Reis, Fátima Serrano, Manuel Ortigueira
Publikováno v:
Sensors, Vol 22, Iss 5, p 1704 (2022)
The uterine electromyogram, also called electrohysterogram (EHG), is the electrical signal generated by uterine contractile activity. The EHG has been considered an expanding technique for pregnancy monitoring and preterm risk evaluation. Data were c
Externí odkaz:
https://doaj.org/article/f913d2ca41b7438a90683b6dc31d81a6
Autor:
Gabriel Bengochea, Manuel Ortigueira
Publikováno v:
Mathematics, Vol 9, Iss 10, p 1150 (2021)
This paper proposed a definition of the fractional line integral, generalising the concept of the fractional definite integral. The proposal replicated the properties of the classic definite integral, namely the fundamental theorem of integral calcul
Externí odkaz:
https://doaj.org/article/296054b912804709be1d7c77b11d3ac2
Publikováno v:
Management Letters/Cuadernos de Gestión, Vol 1, Iss 1, Pp 67-103 (2001)
In the present, public health system in Spain is going through a modernisation trend, mainly aimed towards the beneficiaries of its services, i.e., the whole citizens. Among the wide set of actions being put forward are the implementation of new orga
Externí odkaz:
https://doaj.org/article/de6d5b1783c74715863384eb427584ee
Consumer’s trust in Internet shopping: a modelling proposal based on the standard learning hierarchy
Publikováno v:
Management Letters/Cuadernos de Gestión, Vol 6, Iss 2, Pp 59-79 (2006)
This paper is placed on the framework of studies focused on analyzing the consumers’ buying behaviour on the Internet. We have based on adapting the hierarchy-of-effects model (standard learning hierarchy), in order to theoretically propose a conce
Externí odkaz:
https://doaj.org/article/c4da51f861594a42b83dcbaacdf24f1c
Publikováno v:
Management Letters/Cuadernos de Gestión, Vol 5, Iss 1, Pp 89-102 (2005)
In this paper we contribute to specify the construct «involvement», including the following aspects:a) knowledge of its origin and the several theoretical frames to approach it; b) elimination of potential confusion over other constructs (such as t
Externí odkaz:
https://doaj.org/article/9683668b4ad34fcfbe958c4089a871f6
Autor:
Manuel Ortigueira, José Machado
Publikováno v:
Fractal and Fractional, Vol 1, Iss 1, p 3 (2017)
The actual state of interplay between Fractional Calculus, Signal Processing, and Applied Sciences is discussed in this paper. A framework for compatible integer and fractional derivatives/integrals in signals and systems context is described. It is
Externí odkaz:
https://doaj.org/article/fd81706197ba46aa9e17df6f6f886eb8
Autor:
Manuel Ortigueira, José Machado
Publikováno v:
Fractal and Fractional, Vol 1, Iss 1, p 2 (2017)
This paper proposes the definition of fractional definite integral and analyses the corresponding fundamental theorem of fractional calculus. In this context, we studied the relevant properties of the fractional derivatives that lead to such a defini
Externí odkaz:
https://doaj.org/article/709c291ee95e4dcc8243cd0f9ee162d4