Chirped fiber Bragg grating (CFBG) sensors coupled to high speed interrogation systems are described as robust diagnostic approaches to monitoring shock wave and detonation front propagation tracking events for use in high energy density shock physics applications. Taking advantage of the linear distributed spatial encoding of the spectral band in single-mode CFBGs, embedded fiber systems and ass...

Magnetic particle tracking (MPT) was employed to study a rotating drum filled with cork particles, using both air and water as interstitial medium. This noninvasive monitoring technique allows for the of translation rotation in dry granular liquid–solid systems. Measurements on floating bed were compared detailed analysis shape velocity profiles performed. It found that change particle–wall par...

in this paper, we propose a novel method for fully automatic detection and tracking of human heads and faces in video sequences. the proposed algorithm consists of two modules: a face detection module and a face tracking module. the detection module, detects the face region and approximates it with an ellipse at the first frame using a modified version of adaboost cascaded classifier. the detec...

The active contour model (ACM) Snakes permits to simultaneously solve, in constrained cases, both the segmentation and tracking problems and has been proposed by [Kass et al (1987)]. The aim of this work is to propose a particular ACM formulation to track and analyze left ventricular (LV) endocardial wall motion from color kinesis (CK) echocardiography images [Murta (1998)]. A new approach call...

Heart motion video tracking is an atraumatic technique for analysing left ventricular wall abnormalities. The borders of the left ventricular silhouette as seen under an image intensifier are tracked at a number of points using two electronic markers, and the procedure is carried out in the posteroanterior, and right and left anterior oblique positions. This movement is converted into an analog...

We present a novel multi-resolution variational framework for vascular optical coherence elastography (OCE). This method exploits prior information about arterial wall biomechanics to produce robust estimates of tissue velocity and strain, reducing the sensitivity of conventional tracking methods to both noise- and strain-induced signal decorrelation. The velocity and strain estimation performa...

This paper introduces new learning algorithms for natural language processing based on the perceptron algorithm. We show how the algorithms can be efficiently applied to exponential sized representations of parse trees, such as the “all subtrees” (DOP) representation described by (Bod 1998), or a representation tracking all sub-fragments of a tagged sentence. We give experimental results showin...

monly associated with diverticular disease or inflammatory bowel disease. They usually involve the lower abdominal wall. If the process starts retroperitoneally, the resulting fistula will follow a tortuous route, tracking along the inguinal ligament, femoral canal, sciatic or obturator foramen and into the thigh. However, colocutaneous fistulas secondary to anastomotic leaks are rare. We descr...

Background Dobutamine stress magnetic resonance (DSMR) has been established for the detection of coronary artery disease (CAD) due to its high diagnostic accuracy and prognostic value. The novel technique feature tracking (FT) analyses regional myocardial strain and thereby offers detailed information about myocardial deformation. The purpose of this study was to examine how FT based circumfere...