Edificio, en Tel-Aviv

This building is a clear example of the efforts now being made by the new generations of Israel architects to develop a national architecture, based principally on prefabrication, and running contrary to the classic moulds so deeply rooted in the Middle East, and also to the strong wave of American style modernism. Up to now, this is the tallest building in Tel-Aviv. It consists of vertical pillars at ground level, which branch out into Y shaped supports at the second floor. A large block of apartments rises above these. The outer walls consist of prefabricated concrete parts; there is also a large trellice structure, made up of concrete units, which supports a number of projecting fittings; these provide shade and facilitate ventilation. This type of fittings has proved very useful throughout Israel as a means of solving the basic problem of shade against the sun and suitable ventilation.Constituye un claro exponente de la lucha que sostiene la. nueva generación de arquitectos, formados en Israel, por crear una arquitectura nacional propia—basada principalmente en la prefabricación—, contraria a los moldes clasicistas tan arraigados en el Oriente Medio y a la gran ola de arquitectura americanizante. El edificio, el más alto construido hasta la fecha, en la zona central de Tel-Aviv, arranca en planta baja de unos pilares verticales, que se abren en la planta primera en forma de Y, para sustentar el bloque de apartamentos. Los cerramientos de fachada están construidos con piezas prefabricadas de hormigón; y una gran celosía constituida por bloques de hormigón, a los cuales van adosadas unas piezas salientes que dan sombra y facilitan la ventilación, resolviendo acertadamente este problema fundamental en toda la arquitectura del país

The XENON100 Dark Matter Experiment

The XENON100 dark matter experiment uses liquid xenon (LXe) in a time projection chamber (TPC) to search for Xe nuclear recoils resulting from the scattering of dark matter Weakly Interacting Massive Particles (WIMPs). In this paper we present a detailed description of the detector design and present performance results, as established during the commissioning phase and during the first science runs. The active target of XENON100 contains 62 kg of LXe, surrounded by an LXe veto of 99 kg, both instrumented with photomultiplier tubes (PMTs) operating inside the liquid or in Xe gas. The LXe target and veto are contained in a low-radioactivity stainless steel vessel, embedded in a passive radiation shield. The experiment is installed underground at the Laboratori Nazionali del Gran Sasso (LNGS), Italy and has recently published results from a 100 live-days dark matter search. The ultimate design goal of XENON100 is to achieve a spin-independent WIMP-nucleon scattering cross section sensitivity of \sigma = 2x10^-45 cm^2 for a 100 GeV/c^2 WIMP.Comment: 23 pages, 27 figures; version accepted by journa