Papers by Author: Mečislovas Mariūnas

Abstract: In the paper the industry role in the curricula of engineering education is examined. There are shown that the information obtained on industry developments trends, product export/import ratio as well as the level of investments injected into individual industry sub-sectors helps to make projections as to the number and profile of future professional staff; more specifically, as to the type of curriculum modules and the university acceptance level. Based on the information obtained from university graduates and managers from industrial enterprises as well as other authorities and summarized in an appropriate way, adequate corrections are introduced into the curriculum module without prejudice to regulations of the Government of the Republic Lithuania and to the provisions of the Bologna Declaration.

Abstract: The paper analyses chemical and magnetronic coating methods. The investigation is made into the types of such implant-oriented materials that are best featured for their bonding properties. It has been established that the most durable and solid coatings are the ones that are made by way of magnetronic method. The coatings are less subject to wear-out process when cobalt plays the function of the bonding material once inserted between polyethylene and ceramics and subsequently coated with the layer of ceramic material.

Abstract: Based on biosignal energy equality to the work performed by a muscle, in the estimation of energy dissipation within a biolotronic system, analytical expressions have been derived that have helped to calculate major mechanical characteristics of the muscle including elongation of the muscle, speed and acceleration of such elongation. The paper presents the analysis of relevant digital methods alongside with the formulae for the calculation of major mechanical characteristics when the relationship of a muscle biosignal that is presented in a graphical way. As shown, fatigue of the muscle is characterized by one of extreme points of the phase shift function. The values of the first and the second derivatives of the elongation function may be used for the evaluation of functional capacity of the muscle.

Abstract: Analysis into the effects of parametric characteristics of visual aid on the perception level of information transmitted has led to the possibility of examining and determining the quality of the reading level as a function of certain parameters of a digital apparatus (sensor), the distance to the text, the size of letters and the intensity of light. Efforts have been made to evaluate the effect of the specifications of the executor as well as the information transfer (by tactile way) speed onto the sensory organs of the disabled person at the perception level. A choice has been made of rational information transfer speeds and appropriate visual aid characteristics to facilitate an adequate perception level.