Encontrado(s) 2170865 resultado(s)
Encontrada(s) 217087 página(s)
Encontrada(s) 217087 página(s)
- Barroso, José
En la segunda mitad del siglo XX se ha llegado a denominar a nuestra sociedad «civilización de la imagen»; otros más precisos la han calificado como «era del simulacro». Ya en los albores del nuevo siglo se habla de la cultura de la imagen y de la realidad como espectáculo. Desde estas tribunas de opinión se oyen proclamas que van desde la política de los «gestos», hasta la dictadura del «marketing». Por ello, el autor de este trabajo señala que estamos en un sistema social saciado en su propia imagen, inmersos alegremente en el reino de la apariencia, donde lo más profundo es la superficie.
- Barroso, José
Teenagers have a close relationship of complicity with television, tainted by narcissism: only exist for them evident, agreeable and gratifying things. A serious and useful analysis requires outlining the profile of the teenagers today, as well as the environment of relationships, interaction and communication. Spare time defines a new level of consumption in Media which the school is far away to assume. Media literacy develops reading and writing kills. It is not merely a matter of analyze on a critic way the messages, media and television products, but also to create platforms for production. Educators, youngsters, students, social workers and journalists create a network which ensures media literacy. The eyes of the youngsters are glued to the television screen, and the environment of the school has to be the place for dialogue and analysis of this consumption. School and leisure time need to build the necessary bridges so that the youngsters may become critical citizens and participate in a healthy audiovisual consumption.
- Barroso, José
Media studies in Spain have been conspicuous for their discontinuity, slumps, and reductionisms. Educational institutions haven’t actually acknowledged the key social role that media and their screens play as agents and role-models in education. Hence that there arises the pressing need to devise a program that co-ordinates and integrates audiovisual and multi-visual literacy within the present school syllabus.
- Campos, María
The speed in messages transmission and in the accesibility to the Internet and other technological advances have increased users and receivers intervention in mass media and have given us another way of interpersonal communication, the virtual one. This p
MHD free convection flow of Eyring–Powell fluid from vertical surface in porous media with Hall/ionslip currents and ohmic dissipation
- Gaffar, S.
- Prasad, V.
- Reddy, E.
A mathematical study is presented to analyze the nonlinear, non-isothermal, magnetohydrodynamic (MHD) free convection boundary layer flow, heat and mass transfer of non-Newtonian Eyring–Powell fluid from a vertical surface in a non-Darcy, isotropic, homogenous porous medium, in the presence of Hall currents and ionslip currents. The governing nonlinear coupled partial differential equations for momentum conservation in the x, and z directions, heat and mass conservation, in the flow regime are transformed from an (x, y, z) coordinate system to a (ξ, η) coordinate system in terms of dimensionless x-direction velocity (f′) and z-direction velocity (G), dimensionless temperature and concentration functions (θ and ϕ) under appropriate boundary conditions. Both Darcian and Forchheimer porous impedances are incorporated in both momentum equations. Computations are also provided for the variation of the x and z direction shear stress components and also heat and mass transfer rates. It is observed that with increasing ɛ, primary velocity, secondary velocity, heat and mass transfer rates are decreased whereas, the temperature, concentration and skin friction are increased. An increasing δ is found to increase primary and secondary velocities, skin friction, heat and mass transfer rates. But the temperature and concentration decrease. Increasing βe and βi are seen to increase primary velocity, skin friction, heat and mass transfer rates whereas secondary velocity, temperature and concentration are decreased. Excellent correlation is achieved with a Nakamura tridiagonal finite difference scheme (NTM). The model finds applications in magnetic materials processing, MHD power generators and purification of crude oils.
Anterior tibial artery pseudoaneurysm due to interlocking bolt of tibial nail: A case report and review
- Gahlot, Nitesh
- Kanojia, Rajendra
Vascular injuries associated with the tibial nailing have been reported in few case reports. We here report a unique case of anterior tibial artery (ATA) pseudoaneurysm caused by the second proximal coronal interlocking bolt. We found that the position of interlocking bolts on the nail brings them very close to the anatomical positions of arteries in leg. The reports of ATA injury by interlocking bolts highlight the need for reconsidering the nail design and screw hole positions.
Late gadolinium enhancement does occur in Tako-tsubo cardiomyopathy — A quantitative cardiac magnetic resonance and speckle tracking strain study
- Niranjan Gaikwad, Niranjan Gaikwad
- Butler, Thomas
- Maxwell, Ryan
- Shaw, Elizabeth
- E. Strugnell, Wendy
- Chan, Jonathan
- A. Figtree, Gemma
- E. Slaughter, Richard
- Hamilton-Craig, Christian
Late gadolinium enhancement (LGE) on cardiac magnetic resonance imaging (CMR) has been recommended to distinguish Tako-tsubo cardiomyopathy (TTC) from either acute myocardial infarction or myocarditis. 44 consecutive patients with confirmed Mayo Clinic criteria for TTC underwent CMR imaging at 1.5 Tesla during the acute phase. 10 patients who had CMRI to exclude scar related ventricular tachycardia, and had negative studies, were used as negative controls. LGE was quantitated at two signal intensity thresholds (CircleCVi software) at > 2 and > 5 standard-deviations (SD) above reference myocardium, and compared to biomarkers. Mean door-to-CMR time was 57 hours. 18 patients (41%) had LGE > 2 SD localized to the area of abnormal wall motion, representing 28.9 ± 11.2% LV mass. In 16 of these 18 patients (89%) LGE signal intensity was > 5 SD above normal myocardium, representing 12.1 ± 10% LV mass. LGE signal intensity was significantly greater in TTC than in matched controls (p < 0.05) but lower than in STEMI patients (p < 0.05). Mean troponin was significantly higher in LGE positive patients (2.5 ± 1.8 vs 4.4 ± 6.9, p = 0.001). Mean ejection fraction (EF) by CMR was 45% ± 8.7 in LGE-negative, and 40% ± 7.1 in LGE-positive patients (p = 0.37). Recovery of segmental function was confirmed at follow-up, mean EF was 59% in both groups. LGE was present in 41% of cases of TTC, 89% of which had intense enhancement > 5 SD above normal myocardium. Presence of LGE was associated with worse myocardial injury in the acute setting, with no difference in recovery of function.
- Rossi, Pablo
The concept of reflexivity is key within the body of work of Anthony Giddens because it links basic topics such as agency, routines and institutions. A bibliographic analysis examines reflexivitys different uses and limitations. According to the problem about the link between the micro and the macro in sociology, the first part identifies the role of reflexivity within the theory of structuration. Then the analysis shifts to the role of Reflexivity in the production, reproduction, and change of modern institutions. Finally, as means to increase the analytic usefulness of the concept, a proposal for three uses of the term reflexivity is discussed. The proposal also highlights the perspective of observation and the subject of reflexivity. The proposed distinctions are put into play in order to argue against the apparent contradiction between reflexivity and routines. The conclusion highlights on several of the limitations in Giddens’ work and show a few ways to advance with the study of Reflexivity.
- Gajitos, Marisun
The world of fashion is often associated with being trendy and being able to spend a good amount of money in purchasing clothes, shoes and accessories that are «in». The pre-teens, teenagers and yuppies are the main target group. But buying habits are slowly but surely changing, at least in the Northem European countries, and specifically in Finland. The focus is not on quantity but on quality: long-lasting materials and timeless design pieces. And ethics. Though a lot of young people are still prey to cheap, seasonal anires and fashion items, newgeneration designen are anracting clients towards intelligent consumerism: buying for quality and based on values.
Pulmonary vein orientation assessment: Is it necessary in patients undergoing contact force sensing guided radiofrequency catheter ablation of atrial fibrillation
- Gal, Pim
- F.W. Ooms, Joris
- Paul Ottervanger, Jan
- J. Smit, Jaap
- Ahmet Adiyaman, Ahmet Adiyaman
- Misier, Anand
- Delnoy, Peter Paul
- L. Jager, Piet
- Arif Elvan, Arif Elvan
We hypothesized that pulmonary vein (PV) orientation influences tissue contact of the contact force (CF) sensing radiofrequency ablation catheter (CFC) and therefore atrial fibrillation (AF) free survival after pulmonary vein isolation (PVI). The aim of this study was to determine the association between PV orientation, CF and AF free survival in patients undergoing CFC PVI. Sixty consecutive patients undergoing CFC PVI were included. ECG-triggered cardiac CT scans were obtained in all patients before PVI, and the PV orientation was measured at the insertion in the LA for all PVs in both the transverse and frontal plane. PVs were assigned to 1 of 4 orientation groups: ventral–caudal, dorsal–caudal, ventral–cranial and dorsal–cranial. Mean age was 59 years, 88% had paroxysmal AF. AF free survival off anti-arrhythmic drugs after a median follow-up of 12 months was 58% after a single PVI procedure. No association was found between PV orientation and CF. Furthermore, no association was found between PV orientation and AF free survival. In univariate analysis, the number of lesions with a mean CF of 10 g was associated with AF free survival. However, in multivariate analysis, only the AF duration was significantly associated with AF free survival. This study shows that in patients undergoing PVI with the CFC ablation system, PV orientation does not affect CF and is not associated with AF free survival. PV orientation assessment does not appear to be necessary in patients undergoing CFC PVI.