The CLEO detector at the Cornell Electron Storage Ring (CESR) is completing a major upgrade that significantly extends its physics reach in the study of heavy quarks and leptons. The major elements of this detector upgrade are the installation of a “fast” ring imaging Cherenkov detector, a new central drift chamber and a new barrel-style silicon strip vertex detector. Trigger and data acquisiti...

Change management is indispensable in most distributed software systems, which are continuously being modified throughout their life cycle. Managing the changes at runtime in highly available distributed systems is especially challenging as upgrade of a running system should not deteriorate its availability characteristics. We present a distributed algorithm that allows to dynamically upgrade a...

Upgrade of a commercial ultra-high vacuum four-probe scanning tunneling microscopy system for atomic resolution capability and thermal stability is reported. To improve the mechanical and thermal performance of the system, we introduced extra vibration isolation, magnetic damping, and double thermal shielding, and we redesigned the scanning structure and thermal links. The success of the upgrad...

This paper presents a contribution for the safety assessment of historical masonry buildings under seismic loading. Three different simplified safety indexes (in-plan area ratio, area to weight ratio and base shear ratio) are analyzed, taking into account a large sample of fifty-eight Portuguese churches. The sample of building has been organized according to the seismic zonation, from high to ...

This paper discusses the experimental set-up and procedures for the seismic testing and evaluation of a sprinkler system in hospital model. Concrete compression tests are ran to ensure compliance with ACI 355.2 anchor testing qualifications. Maximum shear strength of the anchor is found to include within the piping system model. Frame and piping system within the model is tested under input mot...

The updated version for the Manual of Civil Structures (MOC), a model seismic code in Mexico, was published in 2008. MOC also is incorporating guidelines for the seismic design of base-isolated structures this year 2012, being the first Mexican code to include such recommendations. This paper summarizes the most relevant aspects of these guidelines, their relations to other guidelines worldwide...

Several seismic phases that scattered within a few hundred kilometers of the base of the mantle are observed in a very dense seismic section. The Los Angeles Region Seismic Experiment passive phase array was composed of 88 seismometers placed along a 175 km profile. Records from two deep earthquakes in Tonga and one earthquake near Honshu, Japan show a secondary arrival between clear P and PcP ...

0 Introduction The “VLBA 4-Gbps Upgrade” discussed in this memorandum, part of the larger VLBA Sensitivity Upgrade Project, comprises the replacement of all VLBA systems downstream from the IFs. The primary objective is to enable wideband throughput at a 4 Gbps sustained aggregate data rate. This rate would exploit fully the two 500-MHz IF channels that are generally available, with Nyquist sam...

LHC upgrade studies are ongoing as part of the EU CARE-HHH and of the US-LARP programmes. The aim is a ten-fold increase of the LHC luminosity by the middle of next decade, a possible upgrade of the injector complex to inject at 1 TeV and, at a later stage, to raise the collider energy. The motivations for the LHC upgrade are discussed. An overview of beam dynamics and technological challenges ...