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- 검색키워드
- 저자 : Jo?o Guerreiro (검색결과 4 건)
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Rui Azevedo Guerreiro,Paula Fazendas,Ana Rita Pereira,Ana Marques,João Pais,Sofia Alegria,Kisa Hyde Congo,Ana Catarina Gomes,João Carvalho,Gonçalo Morgado,Inês Cruz,Ana Rita Almeida,Isabel João,Hélder 한국심초음파학회 2020 Journal of Cardiovascular Imaging (J Cardiovasc Im Vol.28 No.2
BACKGROUND: Stress echocardiography has a 72%–85% sensitivity and an 80%–95% specificity. In this study, we characterized patients who received a false-positive stress echocardiogram result. METHODS: A total of 5,256 patients underwent a stress echocardiogram (induced by exercise, dobutamine, or dipyridamole) between 2009 to 2018, and 405 patients (7.7%) received a positive result. Among the positive patients, 300 underwent coronary angiography within 12 months, and these patients were included in this study (mean age = 64.9 ± 9.4 years, 230 men [76.7%]). Coronary artery disease was diagnosed by stenosis ≥50% in any epicardial coronary artery. Clinical and echocardiographic variables were compared between patients with true- and false-positive stress echocardiogram results. RESULTS: Seventy-two patients (24%) had a false-positive stress echocardiogram, with similar rates across stressor types (p = 0.574). Patients with false positives were less frequently men (63.9% vs. 80.7%, p = 0.003), had lower diabetes mellitus prevalence (15.3% vs. 45.6%, p = 0.001), were similar to true positive patients with regard to body-mass index, arterial hypertension prevalence, hyperlipidemia and smoking, and had lower pre-test probability of coronary artery disease (23% vs. 32%, p = 0.016). The wall motion score index (WMSI) was higher in the true-positive stress group, and wall motion abnormalities were more frequent in the apical segments (70.5% vs. 56.7%, p = 0.034). In a multivariable predictive model, men (odds ratio [OR] = 2.994), diabetes (OR = 5.440), and peak WMSI (OR = 10.690) were associated with a true-positive result. CONCLUSIONS: Twenty-four percent of our study population received a false-positive stress echocardiogram result, with similar rates across stressor types. Patients with true-positive stress echocardiogram results are more likely to be men, diabetic, and have a high peak WMSI.
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Experimental characterization of timber framed masonry walls cyclic behaviour
Goncalves, Ana Maria,Ferreira, Joao Gomes,Guerreiro, Luis,Branco, Fernando Techno-Press 2015 Structural Engineering and Mechanics, An Int'l Jou Vol.53 No.2
After the large destruction of Lisbon due to the 1755 earthquake, the city had to be almost completely rebuilt. In this context, an innovative structural solution was implemented in new buildings, comprising internal timber framed walls which, together with the floors timber elements, constituted a 3-D framing system, known as "cage", providing resistance and deformation capacity for seismic loading. The internal timber framed masonry walls, in elevated floors, are constituted by a timber frame with vertical and horizontal elements, braced with diagonal elements, known as Saint Andrew's crosses, with masonry infill. This paper describes an experimental campaign to assess the in-plane cyclic behaviour of those so called "frontal" walls. A total series of 4 tests were conducted in 4 real size walls. Two models consist of the simple timber frames without masonry infill, and the other two specimens have identical timber frames but present masonry infill. Experimental characterization of the in-plane behaviour was carried out by static cyclic shear testing with controlled displacements. The loading protocol used was the CUREE for ordinary ground motions. The hysteretic behaviour main parameters of such walls subjected to cyclic loading were computed namely the initial stiffness, ductility and energy dissipation capacity.
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Experimental characterization of timber framed masonry walls cyclic behaviour
Ana Maria Gonçalves,João Gomes Ferreira,Luís Guerreiro,Fernando Branco 국제구조공학회 2015 Structural Engineering and Mechanics, An Int'l Jou Vol.53 No.2
After the large destruction of Lisbon due to the 1755 earthquake, the city had to be almost completely rebuilt. In this context, an innovative structural solution was implemented in new buildings,comprising internal timber framed walls which, together with the floors timber elements, constituted a 3-Dframing system, known as “cage”, providing resistance and deformation capacity for seismic loading. The internal timber framed masonry walls, in elevated floors, are constituted by a timber frame with vertical andhorizontal elements, braced with diagonal elements, known as Saint Andrew‟s crosses, with masonry infill. This paper describes an experimental campaign to assess the in-plane cyclic behaviour of those so called “frontal” walls. A total series of 4 tests were conducted in 4 real size walls. Two models consist of the simple timber frames without masonry infill, and the other two specimens have identical timber frames but present masonry infill. Experimental characterization of the in-plane behaviour was carried out by static cyclic shear testing with controlled displacements. The loading protocol used was the CUREE for ordinary ground motions. The hysteretic behaviour main parameters of such walls subjected to cyclic loading were computed namely the initial stiffness, ductility and energy dissipation capacity.
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THE PERCEPTION OF ACTIVE LISTENING PRACTICE ON SOCIAL NETWORKS
Lídia Silveira Pina,Sandra Maria Correia Loureiro,Paulo Rita,Paulo Rita,Eduardo Moraes Sarmento,Ricardo G. Bilro,João Guerreiro 글로벌지식마케팅경영학회 2018 Global Marketing Conference Vol.2018 No.07
The evolution of the internet led to a shift in the business operations environment, giving rise to a plethora of challenges and opportunities for companies. Social networks have become attractive to companies due to their interactive nature, not only facilitating conversations with consumers, but also increasing the possibility of enhancing the online consumer brand engagement. Additionally, social networks and online brand communities increased consumers’ possibility of developing an active role in companies’ decision-making process, through the creation of user generated content, together with the opinion sharing and directly information exchange with brands and other internet users. The main objective of this research is to ascertain whether the active listening practice can contribute, in some way, to the improvement of the relationship maintained between consumers and brands. The current study suggests the adaptation of the active listening practice on the online field, as an attempt to enhance the communication strategies held by brands. Hence, this research seeks to demonstrate that this practice can improve the consumer-brand relationship through the development of two qualitative studies, as main approach, where the findings extracted in the first study will be used as inputs to the second one.
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