ATLAS pixel detector electronics and sensors

The silicon pixel tracking system for the ATLAS experiment at the Large Hadron Collider is described and the performance requirements are summarized. Detailed descriptions of the pixel detector electronics and the silicon sensors are given. The design, fabrication, assembly and performance of the pixel detector modules are presented. Data obtained from test beams as well as studies using cosmic rays are also discussed

BIM-Based Design for Road Infrastructure: A Critical Focus on Modeling Guardrails and Retaining Walls

Although building information modeling (BIM) has been widely adopted in the building industry for several decades, the use of BIM in the context of transportation infrastructure has been slow in terms of both adoption and application. Industry and academia are increasingly making efforts to adopt BIM for other non-building civil infrastructure but, so far, there has not been a comprehensive review of these efforts specifically regarding transportation. This paper explores BIM implementation in an infrastructure design project. An Autodesk ® BIM-based tool, Civil 3D, is proposed as a potential BIM tool platform. This paper also focuses on modeling specific road elements not editable from the standard library, such as guardrails and retaining walls, as well as proposing different solutions using Revit and Subassembly Composer and analyzing the interoperability among BIM-based tools

Development of cellulitis caused by Aeromonas hydrophila in allogeneic hematopoietic transplantation: a case report.

The Aeromonas species are Gram-negative bacteria that are commonly found in aquatic environments. Aeromonas hydrophila is the most frequently isolated in humans and has been responsible for a variety of infections: gastrointestinal syndromes, skin and soft tissue infections, sepsis and other less common syndromes

Development of cellulitis caused by Aeromonas hydrophila in allogeneic hematopoietic transplantation: a case report.

The Aeromonas species are Gram-negative bacteria that are commonly found in aquatic environments. Aeromonas hydrophila is the most frequently isolated in humans and has been responsible for a variety of infections: gastrointestinal syndromes, skin and soft tissue infections, sepsis and other less common syndromes

ARDESIA: 4-Channels Fast SDD X-ray Spectrometer for Synchrotron Applications

This work reports on the development of the ARDESIA spectrometer. ARDESIA is a SDD-based, multichannel X-ray spectrometer, optimized for synchrotron applications that require a high-rate (Mcps), high-resolution (below 150 eV FWHM at shaping time faster than 200 ns) soft Xray detection. The main applications for which ARDESIA is designed are X-ray fluorescence (XRF) and X-ray absorption fine structure (XAFS) techniques. A compact, low-noise detection module has been developed for the instrument. The detector signals are amplified by a monolithic four-channel CUBE preamplifier and processed by a digital pulse processor to achieve short pulse processing times, to highlight the good performances of the module at high count rates (about 1 Mcps per channel). In this work, the characterization of the second release of the ARDESIA detection module is reported. This second release has fixed few issues presented by the first one and it is now a stable solution for high performances X-ray spectroscopy. After that, the complete 4-channel instrument is presented. The instrument has been realized so that the detection module can properly fit inside a synchrotron scattering chamber with a finger-like structure. The mechanical structure grants cooling, with a double Peltier TEC strategy, vacuum, insulation from the harsh surrounding environment and potential for placing side-by-side several spectrometers

An Interlaboratory Test Program on the Extensive Use of Waste Aggregates in Asphalt Mixtures: Preliminary Steps

In view of increasing social and environmental consciousness, a circular approach in waste materials management in order to convert them into new secondary resources is becoming more necessary. Given this context, an interlaboratory testing program (ILTP) focusing on maximizing the use of waste aggregates replacing conventional virgin ones has been launched in the framework of the RILEM Technical Committee on \u201cValorisation of Waste and Secondary Materials for Roads\u201d. Construction and demolition wastes, recycled concrete aggregates and steel slags were selected as waste aggregates to be investigated. A reference mixture prepared with natural virgin aggregates was also considered for comparison purposes. This paper describes the results achieved during the first steps of the ILTP concerning: (i) the basic characterization of the selected marginal aggregates; (ii) the Marshall mix design of different asphalt mixtures prepared with one or more waste aggregates. Overall, the experimental results collected during these preliminary steps seem to confirm that the selected marginal aggregates can be considered as valid alternatives for the traditional road materials, while not jeopardizing their performance