Since computer was invented, people are using many devices to interact with computer. Initially there were keyboard, mouse etc. but with the advancement of technology, new ways are being discovered that are quite usual and natural to the humans like stylus, touch-enable systems. In the current age of technology, user is expected to touch the machine interface to give input. Hand gesture is such...

Image recognition and tracking system is the function of the surveillance cameras and camera tracking automatic tracking / shooting. The function of binocular vision includes dual CMOS synchronous motion control, dual channel video acquisition, feature extraction, image matching, object location, depth calculation. AVI video stream directly is processed by image stabilization algorithm, the ima...

A visual illusion is reported which comprises the following: when a monitor with a moving constant velocity grating is swayed in front of a subject, the grating may be perceived as freezing or decelerating on the screen. This percept appears to depend on the magnitude and direction of the retinal grating velocity, relative to that of the monitor. Various possible explanations are rejected. It i...

A beam diagnostic to measure transverse pro les of electron beams is described. This pro le monitor uses a cerium-doped yttrium:aluminum:garnet (YAG:Ce) crystal scintillator to produce an image of the transverse beam distribution. The advantage of this material over traditional uorescent screens is that it is formed from a single crystal, and therefore has improved spatial resolution. The resol...

A traveling wave transverse rf deflecting structure is discussed as a tool for bunch length measurement and as an aid to detailed phase space diagnostics in future FEL projects. The high frequency time variation of the deflecting fields is used to ‘pitch’ or ‘yaw’ the electron bunch where the resulting transverse beam width measured on a simple profile monitor represents a reliable, single-shot...

we introduce the notions of t-dual rickart and strongly t-dual rickart modules. we provide several characterizations and investigate properties of each of these concepts. it is shown that every free (resp. finitely generated free) $r$-module is t-dual rickart if and only if $overline{z}^2(r)$ is a  direct summand of $r$ and end$(overline{z}^2(r))$ is a semisimple (resp. regular) ring. it is sho...

Performance of a free-space optical communication system is influenced by atmospheric turbulence which degrades signal transmission quality. A gamma–gamma channel model employed to characterise this under weak-to-strong conditions. The proposed dual diffuser modulation using subtraction dual-wavelength concept combined with phase screen improve transmission. Its performances are compared conven...

AIM To compare the use of film-based periapical radiographs and digital panoramic images displayed on monitor and glossy paper in the assessment of the periapical status of the teeth. METHODOLOGY A total of 86 subjects were examined. All participants underwent a full-mouth radiographic survey (14 periapical radiographs) and a digital panoramic radiography. The periapical status of all apprais...