The first electrically steerable dual-polarized Ka-band Vivaldi antenna array with connector-less, surface-mount interface is developed. includes integrated coaxial feed lines within the element structure and contact pads on PCB. covers frequency range from 26 to 40 GHz a beam steering of approximately ±60° in elementary planes ±50° diagonal plane, having less than 3 dB scan loss. 8×8 manufactu...

Wear and failure of mechanical seals may be critical in certain applications and should be avoided. Large relative misalignment between the seal faces is the most likely cause for intermittent contact and the increased friction that eventually brings failure. Adjustment of the seal clearance is probably the most readily implemented method of reducing the relative misalignment and eliminating se...

Today’s students often have to interact with a lot of information and content, more precisely declarative knowledge, whereas their studying technique often is simple repetition and retention. To facilitate the process of learning the approach of this article is to suggest a novel paradigm of e-learning IS that rely on old memorization strategies. These strategies are based on the mechanism of m...

In this paper, we propose SeamlessDesign, a novel collaborative workspace for rapid creation of reactive 3-D objects. SeamlessDesign has two significant characteristics in terms of seamless. First, SeamlessDesign supports a wide range of designing processes seamlessly. Users of SeamlessDesign can design from rough drafts to highly detailed 3-D objects in a unified and intuitive manner, includin...

Augmented Reality overlays computer generated images over the real world. This requires precise knowledge of the viewing projection of the headmounted display (HMD) and its position. Most of the previously published methods are complicated or use special equipment for the calibration process. We present a collection of calibration methods usable for fast and easy calibration of camera parameter...