Search results for "pattern"

Intermediate and Advanced Hepatocellular Carcinoma Management in four Italian Centers: Patterns of Treatment and Costs.

2015

Pattern of progression in advanced hepatocellular carcinoma treated with ramucirumab

2020

Abstract Background & Aims Radiological progression patterns to first‐line sorafenib have been associated with post‐progression and overall survival in advanced hepatocellular carcinoma, but these associations remain unknown for therapies in second‐ and later‐line settings. This post hoc analysis of REACH and REACH‐2 examined outcomes by radiological progression patterns in the second‐line setting of patients with advanced hepatocellular carcinoma treated with ramucirumab or placebo. Methods Patients with advanced hepatocellular carcinoma, Child‐Pugh A and Eastern Cooperative Oncology Group Performance Status 0 or 1 with prior sorafenib were randomized to receive ramucirumab 8mg/kg or place…

Corrigendum to “Registration of surfaces minimizing error propagation for a one-shot multi-slit hand-held scanner” [Pattern Recognition 41 (6) 2055–2…

2009

A return to humane medicine: Osler's legacy.

2017

Sir William Osler is celebrated today not only for his contributions to the advancement of medical education, but also for the humanism he brought to the practice of medicine. He was a doctor whose bedside skills and manners were emulated, and can legitimately be called an infectious diseases specialist. Nonetheless, he was also a humanist in the broader sense of the term, a student of human affairs and human nature, who emphasised compassion for the individual. To what extent, if any, are today's challenges influenced by departures from the paradigms created by Osler? In this paper we sought to ascertain whether such a tradition is still relevant to current practice and may foster a new pe…

A Planning and Control System for Self-Driving Racing Vehicles

2018

Autonomous robots will soon enter our everyday life as self-driving cars. These vehicles are designed to behave according to certain sets of cooperative rules, such as traffic ones, and to respond to events that might be unpredictable in their occurrence but predictable in their nature, such as a pedestrian suddenly crossing a street, or another car losing control. As civilian autonomous cars will cross the road, racing autonomous cars are under development, which will require superior Artificial Intelligence Drivers to perform in structured but uncertain conditions. We describe some preliminary results obtained during the development of a planning and control system as key elements of an A…

A pre-processing technique based on the wavelet transform for linear autoassociators with applications to face recognition

1997

In order to improve the performance of a linear autoassociator (which is a neural network model), we explore the use of several preprocessing techniques. The gist of our approach is to store, in addition to the original pattern, one or several pre-processed (i.e. filtered) versions of the patterns to be stored in a neural network. First, we compare the performance of several pre-processing techniques (a plain vanilla version of the autoassociator as a control, a Sobel operator, a Canny-Deriche operator, and a multiscale Canny-Deriche operator) on an example of a pattern completion task using a noise degraded version of a face stored in an autoassociator. We found that the multiscale Canny-D…

Update endokrine Orbitopathie

2009

Automated Detection of Optic Disc Location in Retinal Images

2008

This contribution presents an automated method to locate the optic disc in color fundus images. The method uses texture descriptors and a regression based method in order to determine the best circle that fits the optic disc. The best circle is chosen from a set of circles determined with an innovative method, not using the Hough transform as past approaches. An evaluation of the proposed method has been done using a database of 40 images. On this data set, our method achieved 95% success rate for the localization of the optic disc and 70% success rate for the identification of the optic disc contour (as a circle).

Emergence of extreme events in fiber-based nonlinear devices

2010

We review our experimental and theoretical results showing the emergence of rogue events during light propagation in fiber-based nonlinear systems. Distinct statistical properties are underlined through parametric and Raman amplifications, supercontinuum generation and optical turbulence.

Generalized modulational instability in multimode fibers: Wideband multimode parametric amplification

2015

In this paper intermodal modulational instability (IM-MI) is analyzed in a multimode fiber where several spatial and polarization modes propagate. The coupled nonlinear Schr\"odinger equations describing the modal evolution in the fiber are linearized and reduced to an eigenvalue problem. As a result, the amplification of each mode can be described by means of the eigenvalues and eigenvectors of a matrix that stores the information about the dispersion properties of the modes and the modal power distribution of the pump. Some useful analytical formulas are also provided that estimate the modal amplification as function of the system parameters. Finally, the impact of third-order dispersion …