Analysis of Basic Principles for Sensor System Design Process Mobile Robots

This work considers general classification of SS, which is grouped according to their functional tasks and consists of three groups of devices, as result, an analysis is carried out and features that must be taken into account when designing such sensor systems are determined. The paper proposes a general principle for design of sensor systems of mobile robots, which differs in that an initial model is proposed, which will be one of key components for further design concept. General principles of sensory systems organization are proposed: sensitivity, modality, adaptation and speed

Modern Walking Robots: A Brief Overview

In this review, we would like to present some of the most interesting modern designs of walking robots: bipedal, quadropedal, hexopedal, and octopods. Their advantages and disadvantages are highlighted. It has been determined that structures with eight or more limbs are ineffective due to high level of electricity consumption. The use of more than six number of legs does not give noticeable advantages in profile cross-country ability or maneuverability, however, it allows to reduce the forces and moments of inertia forces due to decrease in mode coefficient (ratio of time spent by propulsor in support to time of entire step), and, consequently, smoother leg movements in swing phase

POLYMERS IN CARDIOVASCULAR SURGERY

 Surgical intervention is still one of the most important treatment methods to investigate or treat a pathological condition, and the cardiovascular surgery is considered one of the most important types of surgical interventions at all. The uniqueness of a human body and the impossibility of its full procreation, enforces the use of various auxiliary materials such as polymers to carry out the most difficult surgery while ensuring further vital activity. In this paper, we explore the features of polymers which are used in cardiovascular surgery, discussing the existing variety of such polymers and the orientations of their use. Depending on the carried out analysis, the classification of main types of polymers had been offered which are the most suitable for cardiovascular surgery, besides generalized classification of polymeric products defects. The obtained results enable to immediately identify all significant factors that may lead to emergence defect for the purpose of its control and prevention to improve the quality of surgical intervention and stabilize the patient's cardiovascular system

Properties of hierarchy zeolite obtained from obsidian and perlite

A method for obtaining hierarchical BEA, MOR, MFI, MTW, and GIS zeolites and nanocomposites by partial recrystallization of perlite and obsidian in the presence of polyquaternary ammonium salts, which act as structure-directing agents, is proposed. The obtained materials are characterized by a developed specific surface, the presence of Lewis (up to 98 mu mol/g) and Bronsted (5-105 mu mol/g) acid sites and show catalytic activity in the process of 1,1-diethoxyethane production from acetaldehyde and ethanol