The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Mid-IR lasers operating at 3–3.2 μm and 4.3–4.4 μm with efficiencies near 20% have been demonstrated from 12C2H2 and HCN-filled low-loss (< 5 dB/m) kagome-structure HC-PCF and from CO-filled silver coated capillaries.
The MV-1 system is a megavolt-class, 10-kJ Marx generator that employs cascade photo-triggering to affect rapid erection of the 13 modular stages. The system produces a negative current pulse with a fall time of 100–120 ns and a pulse width of 400–430 ns (FWHM) into an impedance-matched load. The estimated internal impedance is 15.4 Ω and the peak current is typically 48 kA. The MV-1 system has operated...
The diagnosis of left ventricular mechanical dyssynchrony (LVMD) and identifying cardiac resynchronization therapy (CRT) candidates are challenging problems due to the limitation of the currently applied regional volume-curve analysis. In this study, four-dimensional (4D, 3D+time) left ventricle (LV) regional shape models of 26 LVMD patients were constructed from pre- and/or post- CRT real-time 3D...
This paper describes progress in the design of unobtrusive technology for the tracking of participant status and engagement in spoken conversations. The apparatus and algorithms have applications in human-computer interface design and will enable a better level of communication between an information providing system, or robot, and a human user by mimicking the nonverbal processes that are an essential...
The making mathematics meaningful (3M) project was designed to prepare 50 elementary school teachers to be better qualified to teach their students about measurement. The project was a partnership among the University of Louisiana at Monroe, the Louisiana Department of Education, and a number of school systems in Northeast Louisiana. The project emphasized practical applications of mathematics in...
We present a method that is capable of tracking and estimating pose of articulated objects in real-time. This is achieved by using a bottom-up approach to detect instances of the object in each frame, these detections are then linked together using a high-level a priori motion model. Unlike other approaches that rely on appearance, our method is entirely dependent on motion; initial low-level part...
This paper presents a method that is capable of robustly estimating gait phase of a human walking from a sequence of images using only low-level motion. The approach we adopt is first to learn statistical motion models of the trajectories we would expect to observe for each of the main limbs. We then extract a sparse cloud of motion features from an image sequence using a standard feature tracker...
Research has shown that the dynamics of facial motion are important in the perception of gender, identity, and emotion. In this paper we show that it is possible to use a multilinear tensor framework to extract facial motion signatures and to cluster these signatures by gender or by emotion. Here we consider only the dynamics of internal features of the face (e.g. eyebrows, eyelids and mouth) so as...
This paper surveys the approaches to video representation, focusing on semantic analysis for content-based indexing and retrieval. A problem of adaptive representation of digital multimedia is critically assessed and some novel ideas are presented. Furthermore, the concept of video multimodality is reevaluated and redefined in order to introduce modalities such as editing technique or affect to the...
We present a novel approach to motion synthesis. It is shown that by splitting sequences into segments new sequences can be created with a similar look and feel to the original. Copying segments of the original data generates a sequence which maintains detailed characteristics. By modelling each segment using an autoregressive process we can introduce new segments and therefore unseen motions. These...
We present two approaches for the generation of novel video textures, which portray a human expressing different emotions. Here training data is provided by video sequences of an actress expressing specific emotions such as angry, happy and sad. The main challenge of modelling these video texture sequences is the high variance in head position and facial expression. Principal components analysis (PCA)...
High gain Optical Beam Induced Current (OBIC) imaging has been used for the first time to examine the internal structural effects of electrical stress on thermally-isolated polysilicon resistors. The resistors are examined over a wide range of current densities, producing Joule heating up to ~1200 ?C. Throughout this current density range, the OBIC images indicate a clustering of dopant under dc stress...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.