32 research outputs found
The Acute Renal and Cerebral Toxicity of Lithium: a Cerebro-renal Syndrome? A Case Report
No full textA TRANSPUTER-BASED LIST MODE PARALLEL SYSTEM FOR DIGITAL RADIOGRAPHY WITH 2D SILICON DETECTORS
No full textWe believe that a dedicated parallel computer system can represent an effective and flexible approach to the problem of 'list mode' acquisition and reconstruction of digital radiographic images obtained with a double-sided silicon microstrip detector. We present a Transputer-based implementation of a parallel system for the data acquisition and image reconstruction from a silicon crystal with 200 mum read-out pitch. We are currently developing a prototype of the system connected to a detector with a 10 mm2 sensitive area
A cloud based architecture to support Electronic Health Record
No full textWe introduce a novel framework of electronic healthcare enabled by a Cloud platform able to host both Hospital Information Systems (HIS) and Electronic Medical Record (EMR) systems and implement an innovative model of Electronic Health Record (EHR) that is not only patient-oriented but also supports a better governance of the whole healthcare system.
The proposed EHR model adopts the state of the art of the Cloud technologies, being able to join the different clinical data of the patient stored within the HISs and EMRs either placed into a local Data Center or hosted into a Cloud Platform enabling new directions of data analysis
Modular Data-acquisition System Based On Transputer Technology For Bi-dimensional Time Coincidence Counting
No full textWe describe the rationale and the test of a modular Data AcQuisition system (DAQ) for bi-dimensional (X-Y) digital imaging, based on a 16 channel Time-to-Digital Converter (TDC) NIM module connected to a specially designed TRAnsputer Module (TRAM). TDC time resolution is 12.5 ns (LSB) with a 40 MHz clock, time range is 3.3 s (28 bits), for a maximum rate of 500 kHz/channel guaranteed. The TDC + TRAM pair is the basic unit that can be scaled in modules of 8X + 8Y channels to meet the user's requirement for a larger number of X-Y channels to be considered simultaneously. TDC directly accesses the large RAM memory (32 Mbytes) of the INMOS T805 (20 MHz) transputer on the TRAM board. Each transputer in the modular system is a node of a ring network, whose root transputer node is hosted in a i386-based personal computer. After real-time data acquisition, a parallel reconstruction algorithm resolves time coincidences. Laboratory tests give a reconstruction time of 6.2 s for 1.28 10(5) events on 16 X + 16 Y channels (2 TDC + 2 TRAM), obtained in 1 s with a fluence of 5 X 10(4) events/mm2 (typically used in radiological imaging) on an area of 1.6 X 1.6 MM2
MODULAR DATA-ACQUISITION SYSTEM BASED ON TRANSPUTER TECHNOLOGY FOR BI-DIMENSIONAL TIME COINCIDENCE COUNTING
No full textWe describe the rationale and the test of a modular Data AcQuisition system (DAQ) for bi-dimensional (X-Y) digital imaging, based on a 16 channel Time-to-Digital Converter (TDC) NIM module connected to a specially designed TRAnsputer Module (TRAM). TDC time resolution is 12.5 ns (LSB) with a 40 MHz clock, time range is 3.3 s (28 bits), for a maximum rate of 500 kHz/channel guaranteed. The TDC + TRAM pair is the basic unit that can be scaled in modules of 8X + 8Y channels to meet the user's requirement for a larger number of X-Y channels to be considered simultaneously. TDC directly accesses the large RAM memory (32 Mbytes) of the INMOS T805 (20 MHz) transputer on the TRAM board. Each transputer in the modular system is a node of a ring network, whose root transputer node is hosted in a i386-based personal computer. After real-time data acquisition, a parallel reconstruction algorithm resolves time coincidences. Laboratory tests give a reconstruction time of 6.2 s for 1.28 10(5) events on 16 X + 16 Y channels (2 TDC + 2 TRAM), obtained in 1 s with a fluence of 5 X 10(4) events/mm2 (typically used in radiological imaging) on an area of 1.6 X 1.6 MM2
X-ray imaging test of a microstrip silicon detector with transputer DAQ
No full textThe authors have developed a TDC+Transputer-based acquisition system to study the X-ray imaging capabilities of a silicon μ-strip detector with 100 and 200 μm read-out pitch. This system allows real-time image acquisition and display. The authors present images obtained with an X-ray mammography tube using sub-millimeter high contrast test objects on a 16*16 channels prototyp
Emergent finite frequency criticality of driven-dissipative correlated lattice bosons
No full textCritical points and phase transitions are characterized by diverging susceptibilities, reflecting the tendency of the system toward spontaneous symmetry breaking. Equilibrium statistical mechanics bounds these instabilities to occur at zero frequency, giving rise to static order parameters. In this work we argue that a prototype model of correlated driven-dissipative lattice bosons, of direct relevance for upcoming generation of circuit QED arrays experiments, exhibits a susceptibility sharply diverging at a finite nonzero frequency, which is an emerging scale set by interactions and nonequilibrium effects. In the broken-symmetry phase the corresponding macroscopic order parameter becomes nonstationary and oscillates in time without damping, thus breaking continuous time-translational symmetry. Our work, connecting breaking of time translational invariance to divergent finite frequency susceptibilities, which are of direct physical relevance, could potentially be extended to study other time-domain instabilities in nonequilibrium quantum systems, including Floquet time crystals and quantum synchronization
Quantum impurity models coupled to Markovian and non-Markovian baths
No full textWe develop a method to study quantum impurity models, small interacting quantum systems bilinearly coupled to an environment, in the presence of an additional Markovian quantum bath, with a generic nonlinear coupling to the impurity. We aim at computing the evolution operator of the reduced density matrix of the impurity, obtained after tracing out all the environmental degrees of freedom. First, we derive an exact real-time hybridization expansion for this quantity, which generalizes the result obtained in the absence of the additional Markovian dissipation and which could be amenable to stochastic sampling through diagrammatic Monte Carlo. Then, we obtain a Dyson equation for this quantity and we evaluate its self-energy with a resummation technique known as the noncrossing approximation. We apply this novel approach to a simple fermionic impurity coupled to a zero temperature fermionic bath and in the presence of Markovian pump, losses, and dephasing
X-ray imaging test of a μ-strip silicon detector with a transputer DAQ
No full textThe authors have developed a TDC+transputer-based acquisition system to study the X-ray imaging capabilities of a silicon μstrip detector with 100 and 200 μm read-out pitch. This system allows real-time image acquisition and display. The authors present images obtained with an X-ray mammography tube using sub-millimeter high contrast test objects on a 16*16 channels prototyp
X-ray-imaging Test of A micro-strip Silicon Detector With A Transputer DAQ
No full textWe have developed a TDC+Transputer-based acquisition system to study the X-ray imaging capabilities of a silicon mustrip detector with 100 and 200 um read-out pitch. This system allows real-time image acquisition and display. We present images obtained with an X-ray mammography tube using sub-millimeter high contrast test objects on a 16x16 channels prototype
