Volume 1 Issue 2

Authors: Michael D. Sharkov; Konstantin Ju. Pogrebitsky; Michael E. Boiko; Samuel G. Konnikov

Abstract: General phenomena allowing one to connect x-ray absorption coefficient and electron yield of substance are analyzed. A series of developed laboratory x-ray spectrometers based on rotating anode radiation and aimed at XAFS (x-ray absorption fine structure) measuring are described. Basic schemes of these devices are considered. Particular examples of using the devices for XAFS registration and following substance analysis are demonstrated.

Keywords: Lab Device Schematic; EXAFS Spectroscopy; XANES Spectroscopy; Electron Transport in Matter; Atomic Structure

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Authors: Erika Ottaviano; Salvatore Grande

Abstract: This paper presents a pose estimation device that can be used as monitoring system for the real-time gait analysis of lower extremity. The above-mentioned system is a modified version of the CATRASYS (Cassino Tracking System), which is a measuring system designed and built at University of Cassino, which is able to estimate the pose (position and orientation) and wrenches of a moving object. In this context the pose and wrenches estimation device is used to analyze some basic characteristics of the gait in terms of lower extremity position determination and investigation on the influence of the gait of gender, age, height, and weight. The influence of carrying a load is investigated together with the influence of different types of shoes too. Those results are also shown and discussed for a characterization of the gait and future medical applications, both for diagnosis procedures and rehabilitation therapies.

Keywords: Experimental Robotics; Measuring Systems; Gait Analysis

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Authors: Daniela Perdukova; Pavol Fedor; Misel Batmend

Abstract: The proposed paper deals with two main ideas. The first is focused on principles of construction of an electromagnetic diamond percussion tool used for stone engraving. The second focuses on design and implementation of algorithm, which optimizes this diamond percussion tool path for bitmap CNC engraver. The tool foundation is an electrically driven pointed diamond engraving by hammering on solid, polished surfaces. The first part of the paper includes measurements of tool prototype, describing its basic features and potential applications. Finally, the tool performance is tested on a sample image engraved into polished black granite. The second part presents new algorithm for searching the shortest path connecting all bitmap pixels that need to be engraved with respect to specific constraints given by hard ware of bitmap CNC engraver. New algorithm considered as a heuristic approximation of Hamiltonian shortest path was implemented and tested on a real device. Results of experiments are listed. Concerning a set of 17 real-life bitmaps, the new algorithm saves from 7% up to 17% of overall engraving time compared to original line-by-line tool path.

Keywords: Mechatronic System;Percussion Tool; Experimental Measurements, Headstone Engraving; Photo Etching; Engraving Path; Optimization

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