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Acta Marisiensis. Seria Technologica
The Journal of The University of Medicine, Pharmacy, Sciences and Technology "George Emil Palade" of Targu-Mures
Open access
A Comparative Study Between the Different Modes of Support to Employment

Abstract

The objective of the research is to elaborate a comparative scheme of support and assessment procedures in Vocational Education and Training programmes according to ASSESS project partner’s countries. It is a comparative study between the different modes of support to employment and a conclusion between the existing programs and measures in the ASSESS project partner’s countries, investigating the strengths and weaknesses, assessment and evaluation of employability, methods that have been used and degree of performance. The research provides important information on different programs that includes assessment show the needs, realities and what improvements can be done. This analysis makes it possible to model key steps that will be included in an assessment tool of key skills for employment.

Open access
Complete Solution for Linear Programming Problem in two Variables and One Restriction

Abstract

In this work we consider an elementary linear programming problem with one restriction in order to be returned the set of solutions. For this, we include the corresponding source code.

Open access
Empirical Mode Decomposition in Discrete Time Signals Denoising

Abstract

This study explores the data-driven properties of the empirical mode decomposition (EMD) for signal denoising. EMD is an acknowledged procedure which has been widely used for non-stationary and nonlinear signal processing. The main idea of the EMD method is to decompose the analyzed signal into components without using expansion functions. This is a signal dependent representation and provides intrinsic mode functions (IMFs) as components. These are analyzed, through their Hurst exponent and if they are found being noisy components they will be partially or integrally eliminated. This study presents an EMD decomposition-based filtering procedure applied to test signals, the results are evaluated through signal to noise ratio (SNR) and mean square error (MSE). The obtained results are compared with discrete wavelet transform based filtering results.

Open access
Existence and Uniqueness of the Infinite Matrix Factorization LU

Abstract

The purpose of this paper is to give conditions for the existence and uniqueness of the infinite matrix factorization LU.

Open access
Experiments on Temperature Control Using On-Off Algorithm Combined with PID Algorithm

Abstract

The paper presents an automated system for the temperature control using a PIC microcontroller, a digital temperature sensor with I2C and a MOSFET as actuator. The control strategy is a proportional-integrative one, preceded by an on-off algorithm. The most important data is presented on a graphical interface. In order to send the parameters of the process and the command states to the computer, the serial communication is used.

Open access
Sinthesis on Theories of Quality Management with Application in Wiring Industry

Abstract

Quality management in the electrical wiring industry is a complex issue. The paper presents a brief literature review in complex terms related to the quality management, the methods which can be used towards continuous improvement, first as quality management in its whole concept, than as quality management in the wiring industry. The base in quality in wiring industry are the test in the Laboratory and verifications in the production line. Finally, is focusing on the electrical resistance which on several tests was to high exceeding the maximum value. Due to this, a corrective action must be implemented.

Open access
Study on Designing the Extruder for 3D Printers with Pellets

Abstract

The purpose of the paper is to design an extruder to ensure continuous flow of material and retraction of the melted material into the extruder of the printers operating with pellets ABS, PLA or other materials used. The way in which 3D printers work differs from that of plastic injection machines by the fact that for the execution of a piece it is necessary for the extruder to position itself at different points of the surface without depositing the material. If it does not stop the flow of material during the repositioning move, then the executed piece will be compromised. Designed pieces were designed with the help of the Inventor Software and it was determined experimentally whether the extruder is working. It was found that the original design did not fully meet the requirements of the coat-coat process, which is why rethinking of the extruder’s operation and modifications to ensure retraction of the material is necessary.

Open access
Study on the Influence of Carbon on Standardized and Non-Standardized Steel

Abstract

The way a piece or tool behaves in operation is determined by the quality of the material from which it is made, the precision of execution and heat treatment applied. In the present research, it is highlighted the differences that take shape after heat treating different materials (low carbon steel and high alloyed steel) including heating to dissimilar austenitic phases (880°C and 1020°C), holding for non-identical times, tempering at low temperature (260 °C) and then cooling by using separate cooling mediums (oil, air and water). The results show no noticeable increase in the hardness and mechanical properties for the low carbon steel after the heat treatment, but on the other hand, the high alloyed steel, reveals distinguishable changes in both hardness and mechanical properties. There is a close link between the structure, the parameters of the thermal processes and the properties that are desired so that future specialists have to assimilate the basic knowledge related to the phenomena that occur during a heat treatment but at the same time it is important to equip the companies with machines and measure devices, like a spectrometer.

Open access