1,720,961 research outputs found
Design and Analysis of RF/High-Speed SERDES in 28 nm CMOS Technology for Aerospace Applications
No full textThis paper proposes a transistor-level design of a high-speed 10-bit Serializer-Deserializer (SerDes) circuit for Aerospace applications, in a 28 nm CMOS technology. A data-rate above 10 Gbit/s has been taken as a target for the development, together with a −50 °C to 125 °C temperature range. The extreme performance requirements made necessary the realization of a full-custom design and the use of Current Mode Logic (CML) circuits. This solution brings advantages in devices where high speeds are required, overcoming standard CMOS logic capabilities. Moreover, an aerospace application involves an analysis over radiation and their effect on integrated circuits. The relatively low presence of cumulative radiation doses in this environment let them to be neglected and to focus the attention on the disturbs coming from high-energy particles hitting the substrate (Single Event Effects). These, in fact, constitute one of the main causes of failures in electronic devices for avionic systems
Analysis and Design of a Non-linear MPC Algorithm for Vehicle Trajectory Tracking and Obstacle Avoidance
No full textThis paper presents a non-linear Model Predictive Control (MPC) algorithm developed using GRAMPC library (GRadient-based Augmented-lagrangian framework for embedded non-linear MPC). Trajectory tracking and obstacle avoidance capabilities for vehicle equipped Advanced Driver Assistance Systems are becoming more and more important. These functions give better comfort and enhance safety for drivers and passengers. In this work, the vehicle has been modelled using six states (XY coordinates of the mass centre, yaw angle, velocity, reference yaw angle and Y errors) and two controls (front steer angle and acceleration). In real applications, the desired trajectory and the constraints are provided by the navigation system and sensors, while here a sinusoidal testbench has been chosen. GRAMPC library gives the opportunity of controlling many options, of managing real-time features and accuracy performances. Due to complexity of the non-linear MPC algorithm, classic Electronic Control Units (ECUs) based on low-cost microcontroller units (MCU), often do not have sufficient computing capabilities to meet the accuracy specifications. This explain the reasons of using high-end MCUs or, if necessary, HW-accelerated systems (MCU + FPGA), in order to guarantee performances and safety
ARANCIO M. L., PACCIARELLI M., ADESSO F., COSIMI F., FIORILLO L., INSOLVIBILE N., MIRANDA P., SCHIAPPELLI A., VICENZUTTO D. 2015, Scavi 2014-2015 al poggio di Sermugnano: prime notizie sull’evoluzione dell’abitato tra il primo ferro e l’età ellenistica, «Archaeologiae», XIII, 1-2, p. 104.
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
- …
