EN TORNO A LA ESPACIALIDAD EN LAS IGLESIAS CRISTIANAS Y MEZQUITAS MUSULMANAS

Resumen: El templo es un acontecimiento crucial en la vida religiosa de las diferentes culturas. En el artículo se abordan unos aspectos de la vivencia del templo como espacio sagrado. Se analizan dimensiones cualitativas del espacio sacro en el Cristianismo y en el Islam como su direccionalidad, jerarquía y dinamismo. En tal perspectiva se intenta arrojar luz sobre la génesis y el diferente significado del campanario y del minarete como configuraciones de la arquitectura sacra del Cristianismo y del Islam.Palabras clave: arquitectura sacra, espacio del templo, campanario, minaret

War in peace: military uniforms and anthropological preparations for war

En la primera parte del artículo se sostiene que entre la guerra y la paz no hay fronteras definidas y categóricas. Se desarrolla la idea de “preparación antropológica” de la guerra. En la segunda parte se explora el uniforme militar como un factor en la preparación antropológica de la guerra.The first part of the article argues that between war and peace there are no definite boundaries. It addresses the idea of “anthropological preparation” for the war. The second part analyzes the military uniform as a factor for this anthropological preparation

Photoabsorption and photoconductivity in C₆₀ layers

A complex investigation of the photoconductivity of fullerene films, prepared by thermal evaporation in vacuum, was carried out. The investigated films contain predominantly C₆₀ in various phases as shown elsewhere. The multiple photocurrent spectra analysis (MPSA method) has been used in the current study. The MPSA method utilizes a family of routine photocurrent spectra, measured at various intensities generated by the light source. A suitable data processing of such a family allowed several basic characteristics of the films to be obtained – the optical bandgap, subbandgap optical absorption spectra, features of shallow and deep defect states as well as the spectra of the power index in the dependence of the photocurrent on the photon flux. These characteristics were interpreted in terms of structural features of the investigated samples. Conclusions about applications of such C₆₀ films were made

An Arc Discharge by Closely Situated Electrodes for Synthesis of Nanostructures

Abstract. Geometry of electrodes, distance between them, work atmosphere and ambient temperature are the important factors, which determine quantity and variety of structures synthesized via arc discharge. Usually, electrodes of different cross-section are placed away from each other, allowing a large vapor stream directed into the reactor inside to be obtained. Generally, the anode is thinner than the cathode; it heats up to a high temperature, sublimates and supplies the carbon vapor required for nanoparticle synthesis. In contrast to this commonly used approach, when electrode dimensions are appropriately chosen and electrodes placed closely together, temperature interaction between them becomes considerable, discharge area constrains and hot electrodes can be used as heaters for the evaporation of materials of high melting point

An Arc Discharge by Closely Situated Electrodes for Synthesis of Nanostructures

Abstract. Geometry of electrodes, distance between them, work atmosphere and ambient temperature are the important factors, which determine quantity and variety of structures synthesized via arc discharge. Usually, electrodes of different cross-section are placed away from each other, allowing a large vapor stream directed into the reactor inside to be obtained. Generally, the anode is thinner than the cathode; it heats up to a high temperature, sublimates and supplies the carbon vapor required for nanoparticle synthesis. In contrast to this commonly used approach, when electrode dimensions are appropriately chosen and electrodes placed closely together, temperature interaction between them becomes considerable, discharge area constrains and hot electrodes can be used as heaters for the evaporation of materials of high melting point

The x-ray light valve: a low-cost, digital radiographic imaging system- spatial resolution

ABSTRACT In recent years, new x-ray radiographic systems based on large area flat panel technology have revolutionized our capability to produce digital x-ray radiographic images. However, these active matrix flat panel imagers (AMFPIs) are extraordinarily expensive compared to the systems they are replacing. Thus there is a need for a low cost digital imaging system for general applications in radiology. Different approaches have been considered to make lower cost, integrated x-ray imaging devices for digital radiography, including: scanned projection x-ray, an integrated approach based on computed radiography technology and optically demagnified x-ray screen/CCD systems. These approaches suffer from either high cost or high mechanical complexity and do not have the image quality of AMFPIs. We have identified a new approach -the X-ray Light Valve (XLV). The XLV has the potential to achieve the immediate readout in an integrated system with image quality comparable to AMFPIs. The XLV concept combines three well-established and hence lowcost technologies: an amorphous selenium (a-Se) layer to convert x-rays to image charge, a liquid crystal (LC) cell as an analog display, and an optical scanner for image digitization. Here we investigate the spatial resolution possible with XLV systems. Both a-Se and LC cells have both been shown separately to have inherently very high spatial resolution. Due to the close electrostatic coupling in the XLV, it can be expected that the spatial resolution of this system will also be very high. A prototype XLV was made and a typical office scanner was used for image digitization. The Modulation Transfer Function was measured and the limiting factor was seen to be the optical scanner. However, even with this limitation the XLV system is able to meet or exceed the resolution requirements for chest radiography