34,564 research outputs found
Recibo, 1925 abr. 13, Madrid, de Editorial Plus-Ultra a D. M. Rien Puente
No full textRecibo impreso en azul y rojo, manuscrito en tinta negra, con número "1727"Alcance y contenido: Versa sobre la cantidad abonada por el destinatario, que se corresponde con el importe de saldo de su cuentaEn el membrete: "Editorial Plus-Ultra / Argensola, 2 / Madrid"Recibo firmado y rubricado por el Gerente de la Editorial, con firma ilegibleMembrete con los datos del nombre, la actividad y la dirección del establecimiento, en distintas líneas. Todo ello enmarcado con una cenefa en color verde y con fondo de colores. A la izquierda del recibo, Estado de Cuenta del destinatarioPapel color crema, perteneciente a un tac
Crónica y cine en Plus Ultra: cine, patria y tradición
No full textEl presente artículo constituye parte de la investigación sobre crónica y distinción en la prensa argentina durante las tres primeras décadas del siglo XX. La crónica referida al cine nacional integra un repertorio de discursos dedicados a los nuevos medios de comunicación y las nuevas artes que vinculan a la revista Plus Ultra con el proyecto modernizador en Argentina. Nuestra lectura se orienta hacia el análisis de las tensiones que tal proyecto genera en relación con las prácticas de la distinción que definen la agenda editorial de Plus Ultra
Ultra-precision grinding of PZT ceramics--Surface integrity control and tooling design
No full textA comprehensive statistical analysis of the factors controlling surface quality and form in ultra-precision grinding of polycrystalline lead zirconate titanate (PZT) ceramics has been conducted. The work focuses on practical grinding conditions and it includes an assessment of the interactions that exist between the method of material removal and the machine design. In the first phase of experimentation, defects including porosity and the fractural damage induced in the subsurface area were investigated. Machining trials were then conducted which were used to highlight the significant technical factors or combinations of technical factors that influence surface roughness, surface flatness and textural damage. A model for the systematic material removal mechanism which suggests that a relatively large depth of cut and ‘soft contact’ can be used to achieve improved surface integrity is proposed. In order to verify the suggested model, a series of design modifications to the tooling structure were made and the nature of the contact at the material removal interface was studied. Dramatic improvements in surface quality were achieved by incorporating a compliant polymer layer into the vacuum chuck used to hold the ceramics during grinding
A Population-Based Ultra-Widefield Digital Image Grading Study for Age-Related Macular Degeneration-Like Lesions at the Peripheral Retina.
No full textOur understanding of the relevance of peripheral retinal abnormalities to disease in general and in age-related macular degeneration (AMD) in particular is limited by the lack of detailed peripheral imaging studies. The purpose of this study was to develop image grading protocols suited to ultra-widefield imaging (UWFI) in an aged population
Radio channel characterisation and system-level modelling for ultra wideband body-centric wireless communications
No full textPhDThe next generation of wireless communication is evolving towards user-centric networks,
where constant and reliable connectivity and services are essential. Bodycentric
wireless network (BCWN) is the most exciting and emerging 4G technology
for short (1-5 m) and very short (below 1 m) range communication systems. It has
got numerous applications including healthcare, entertainment, surveillance, emergency,
sports and military. The major difference between the BCWN and conventional
wireless systems is the radio channel over which the communication takes place. The
human body is a hostile medium from the radio propagation perspective and it is
therefore important to understand and characterise the effect of the human body on
the antenna elements, the radio propagation channel parameters and hence the system
performance. In addition, fading is another concern that affects the reliability and
quality of the wireless link, which needs to be taken into account for a low cost and
reliable wireless communication system for body-centric networks.
The complex nature of the BCWN requires operating wireless devices to provide
low power requirements, less complexity, low cost and compactness in size. Apart
from these characteristics, scalable data rates and robust performance in most fading
conditions and jamming environment, even at low signal to noise ratio (SNR) is
needed. Ultra-wideband (UWB) technology is one of the most promising candidate for
BCWN as it tends to fulfill most of these requirements. The thesis focuses on the characterisation
of ultra wideband body-centric radio propagation channel using single
and multiple antenna techniques. Apart from channel characterisation, system level
modelling of potential UWB radio transceivers for body-centric wireless network is
also proposed. Channel models with respect to large scale and delay analysis are derived
from measured parameters. Results and analyses highlight the consequences
of static and dynamic environments in addition to the antenna positions on the performance
of body-centric wireless communication channels. Extensive measurement
i
campaigns are performed to analyse the significance of antenna diversity to combat
the channel fading in body-centric wireless networks. Various diversity combining
techniques are considered in this process. Measurement data are also used to predict
the performance of potential UWB systems in the body-centric wireless networks.
The study supports the significance of single and multiple antenna channel characterisation
and modelling in producing suitable wireless systems for ultra low power
body-centric wireless networks.University of Engineering and Technology Lahore Pakista
I\u27m Not Rockefeller: Implications for Major Foundations Seeking to Engage Ultra- High-Net-Worth Donors
No full text· This article describes how a group of 33 ultrahigh- net-worth philanthropists (UHNWPs) approach their giving.
· A few key areas dominated their giving priorities: education; health; poverty and social welfare; and children/youth initiatives each were a priority for more than a quarter of participants – with education expressed as an interest of 55 percent.
· A third of the 24 who responded to the question spent less than 10 percent of their full working time devoted to philanthropy, and 13 dedicated less than 20 percent of their working time.
· UHNWPs view their peers as their most trusted information resource. After peers, the most commonly cited source of information was the popular press.
· UHNWPs typically are ambivalent or uncertain about the value of evaluation.
· Partnerships between organized philanthropy and UHNWPs has potential benefits for both, if barriers of job responsibilities, training, communication styles and vocabulary can be overcome
FORMACIÓN DOCENTE:“UN ESPACIO DEL CURRICULUM-UNIVERSITARIO"
No full textLos objetivos de nuestro trabajo son mejorar la enseñanza universitaria a partir de la formación docente universitaria apropiada a la construcción de un curriculum universitario acorde a las necesidades de nuestro contexto. El estudio diagnóstico del nivel de concordancia entre los objetivos, los contenidos,la metodología de la enseñanza y la evaluación, muestra una ruptura en el curriculum actual.El quiebre entre la teoría y la práctica educativas incide negativamente en las dificultades de aprendizajes significativos. Es ineludible el desarrollo de la Pedagogía Universitaria y la investigación educativa que la sustente para generar la formación docente apropiada a las necesidades de la enseñanza universitaria
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