45 research outputs found
Design for Portability of Reconfigurable Virtual Instrumentation
No full textA portable architectural design strategy is described for the implementation of reconfigurable virtual instrumentation based on programmable Systems-on-Chip integrating microprocessors and FPGA in the same physical device. The key role is played by a general purpose communication block as a means to efficiently separate the activities carried out in the microprocessor and in the FPGA. Both parts interact according to simple logic protocols by reading and writing data on the common memory resources of the communication block. The architecture of the proposed communication system can be easily implemented in practically any modern programmable System-on-Chip. With the proposed strategy, the porting of embedded software programs and associated FPGA designs among different device families and vendors is facilitated. A structured methodology is proposed for handling complex real-time systems based on these programmable Systems-on-Chip. We described a concrete communication block that has been successfully implemented and utilized for a quick implementation of a data acquisition system based on a Xilinx Zynq-7030 FPGA Mezzanine Card (FMC) and a custom FMC module with an 8-bit 500 MSPS ADC
Diagnostic Analytics for Pixelated Particle Detectors: A Case Study
No full textWe present a method for diagnostics analysis for pixelated particle detectors. The method is based on extracting information from the detector in the form of model parameters by using a representative mathematical model. To illustrate the procedure we analyzed real experimental data obtained with the electromagnetic calorimeter ECAL2 of the COMPASS experiment at CERN. Having observed the data, the typical pulses were fitted with a mathematical model. Heat maps were drawn to visualize the distribution of the mean values of each of the fitted parameters. This data visualization technique is useful for highlighting areas with similar behavior and detecting abnormal responses in single cells. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland A
A MRI-derived 3D patient specific model for fibrosis quantification in atrial fibrillation
No full textIntroduction: Atrial fibrillation (AF) is the most common type of arrhythmia and the mechanisms that sustain it are not yet clearly identified. Catheter ablation is a promising therapy for AF. However, to achieve durable restoration of sinus rhythm, multiple procedures may be required. Early studies have suggested both extensive atrial tissue fibrosis and association between scar gaps and pulmonary vein (PV) reconnection sites as possible causes of the poor outcomes of the AF catheter ablation. In this study, in order to assist the electrophysiologist in patient selection and ablation procedure planning, we developed a 3D patient–specific left atrium (LA) model integrating anatomical and structural information derived from magnetic resonance angiography (MRA) and delayed–enhanced MR imaging (DE–MRI).
Materials and Methods: Thirty–five patients with paroxysmal AF were enrolled in the study and MRA and DE–MRI images were acquired. A patient–specific anatomical model was derived by MRA data, applying an edge–based level set approach guided by a phase–based edge detector (figure A, upper panels). A multimodality affine registration based on mutual information was then applied to register MRA into the spatial domain of DE–MRI (figure A, bottom panels). Once affine registration parameters were obtained, the corresponding intensity gray level information derived from the DE–MRI was overlapped on the registered 3D surface LA model, allowing the 3D visualization of LA fibrosis location and extent (figure B). In order to obtain a qualitative validation, the 3D LA models were compared with voltage maps reconstructed during the ablation procedures.
Results: The 3D patient specific model obtained through MRA segmentation and registration of DE–MRI data was feasible in all patients. Time required for the analysis was about 30 min for each patient. An example of the qualitative comparison between high enhanced regions in the 3D LA model with fibrosis information and the low voltage areas in the electroanatomical map is shown in figure C.
Conclusion: Preliminary qualitative validation of the 3D LA model including structural information seems a promising tool for a correct fibrosis localization and quantification. Next steps include assessment of the proposed tool to quantify scar location and extent for patient selection and catheter ablation planning.
JOURNAL/ehjci/beta/01619449-201605001-00094/math_94MM1/v/2017-03-08T095554Z/r/image-pn
DAQ platform based on SoC-FPGA for high resolution time stamping in cosmic ray detection
No full textAccurate timing in cosmic ray detection is critical for reconstruction of events from multiple scattered detectors. Since most of the detectors dedicated to study cosmic rays generate continuous analog signals, a precise timing depends on the sampling rate and the subsequent triggering system operating on the generated digital data stream. In this paper, a data acquisition platform based on a fully programmable System-On-Chip (SoC) and a high-speed analog to digital converter, able to manage 8-bit data resolution, 500MHz sampling rate and GPS connection for data synchronization is presented. The SoC is a ZYNQ 7000 device with a Field Programmable Gate Array (FPGA) and a dual core ARM processor embedded on a single chip. The system achieves 2 ns time resolution and is also able to increase data amplitude resolution through oversampling and can simultaneously generate a real time histogram of the incoming data. The platform has an embedded high voltage power supply control with temperature and pressure compensation for optimal and stable operation of different detectors. While the time critical activities are handled and carried out by the FPGA, software running on the dual core ARM processor with a real time operating system (FreeRTOS) provides Ethernet connection for remote control of the platform
High Voltage Isolated Bidirectional Network Interface for SoC-FPGA Based Devices: A Case Study: Application to Micro-pattern Gaseous Detectors
No full textThis paper describes a custom made high voltage isolated bidirectional network interface for communication among FPGA devices, which are in different power domains. Preliminary performance test and measurements of noise tolerance and stability are presented. A case study of an application regarding a network of multiple single-channel power supply systems for Micro Pattern Gaseous Detectors is portrayed. In order to match the specific system needs of dynamic voltage control, the network interface provides a reliable high voltage decoupling up to 2 kV with reasonable noise tolerance and data transmission rate up to 100 Mbps. The flexibility of the interface allows the implementation of different communication protocols
Remote Laboratory for E-Learning of Systems on Chip and Their Applications to Nuclear and Scientific Instrumentation
No full textConfiguring and setting up a remote access laboratory for an advanced online school on fully programmable System-on-Chip (SoC) proved to be an outstanding challenge. The school, jointly organized by the International Centre for Theoretical Physics (ICTP) and the International Atomic Energy Agency (IAEA), focused on SoC and its applications to nuclear and scientific instrumentation and was mainly addressed to physicists, computer scientists and engineers from developing countries. The use of e-learning tools, which some of them adopted and others developed, allowed the school participants to directly access both integrated development environment software and programmable SoC platforms. This facilitated the follow-up of all proposed exercises and the final project. During the four weeks of the training activity, we faced and overcame different technology and communication challenges, whose solutions we describe in detail together with dedicated tools and design methodology. We finally present a summary of the gained experience and an assessment of the results we achieved, addressed to those who foresee to organize similar initiatives using e-learning for advanced training with remote access to SoC platforms
Travesías, un viaje entre libros y lecturas en la Biblioteca de la Academia Argentina de Letras
No full textIn recent years, the study of cultural history has undergone an extraordinary development and, within that framework, the knowledge of society has been deepened through writing, publishing and reading. So, starting from considering that books acquire new life when they are recovered in their textual meaning, in their production conditions and their materialities, the Argentine editions of the 19th century present in the catalog of the Biblioteca de la Academia Argentina de Letras will be analyzed. It is understood that this approach allows studying texts in multiple dimensions. Thus, after passing from the world of print to the world of the reader, we will try to find answers to old questions –such as those found in the Almanaque Indicador Argentino (1899)– from new perspectives of understanding the multiplicity and differentiation of cultural practices, showing the author and his texts, the editor and the editions to reach the readers and the strategies deployed and shared senses around the books and readings in Argentina.En los últimos años, el estudio de la historia cultural ha experimentado un extraordinario desarrollo y, dentro de ese marco, se ha profundizado el conocimiento de la sociedad a través de lo escrito, lo editado y lo leído. De modo que partiendo de considerar que los libros adquieren nueva vida cuando son recuperados en su significación textual, en sus condiciones de producción y sus materialidades, se analizarán algunas ediciones argentinas del siglo XIX presentes en el catálogo de la Biblioteca de la Academia Argentina de Letras. Se entiende que este enfoque permite estudiar los textos en múltiples dimensiones. Así, y tras pasar del mundo del impreso al mundo del lector se intentará encontrar respuestas a viejas preguntas -como las que se encuentran en el Almanaque Indicador Argentino (1899)- desde nuevas perspectivas de comprensión de la multiplicidad y diferenciación de las prácticas culturales, mostrando al autor y sus textos, al editor y sus ediciones para llegar a los lectores y a las estrategias desplegadas y sentidos compartidos alrededor de los libros y las lecturas en Argentina
L'industria dei profumi nell'Egeo dell'Età del Bronzo
No full textThe PhD project focused on the perfume industry in the Aegean world during the Middle and Late Bronze Age (2100-1100 B.C.) and tried to reconstruct as much as possible the activity of the a-re-pa-zo-o “the perfume boiler” inside a Mycenaean palace. This dignitary is an “officer” attached to the palace, by the wa-na-ka, in charge of controlling the perfume production system and managing the raw materials used for their manufacturing. Perfumes are one of the most important luxury goods produced mainly for ritual, ceremonial and religious purposes. It is also one of the most traded luxury goods, even outside the Aegean area, as demonstrated by the numerous stirrup jars found in shipwrecks and in the Near East, as well as in the Mediterranean. The investigation method involved a careful analysis of Linear B sources regarding aromatic substances and the same type of sources from Egypt, the Near East and Greece during the Classical era in order to create a dataset for ingredients, method of production and equipment used. After the identification of the markers, the next step was the analysis of the archaeological contexts, in particular from the Mainland, Crete and Cyclades.
The research activity has produced significant results regarding the typology of tools, pottery, ingredients employed and the production and storage areas among the settlements. Also, shedding light on some technical differences between the Minoan and Mycenaean civilizations
A SoC-FPGA based readout platform for the free-running AMBER data acquisition system
No full textOwing to a change in the scope of physics research, the AMBER spectrometer at CERN is undergoing an update on its instrumentation and trigger strategy for the data acquisition system. One of the key updates is the adoption of a free-running and trigger-less operation, which differs from the predecessor of AMBER, COMPASS, by working in a continuous mode but in an event-based triggered way
La cultura impresa en los avisos publicitarios de la prensa gráfica en la Argentina durante el siglo XX : Alcances y proyecciones (PRIG 2016-2018)
No full textAt the beginning of the 20th century, there were emerged democratizing projects of book access emerging, accompanied by processes of urbanization and schooling that signed and shaped the "future readers". In the construction of book history, edition and reading in Argentina, a series of researches are bringing new approaches and reflections, which makes it possible to study how, when, why of the uses of the book and the modes of reading, as well as the circumstances and strategies deployed by the editorial activity, the author / publisher relationship, the marketing, the profile of the readers and the practices that allowed the appropriation of the print culture. Taking this as a starting point the project The print culture in advertisements of the printing press in Argentina during the twentieth century. Scopes and projections seeks to inquire about some of the many reasons men and women have read, looking at advertising notices and booklets in book's marketing
