<abstract xmlns="http://www.w3.org/1999/xhtml">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.</abstract>

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

<abstract xmlns="http://www.w3.org/1999/xhtml">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.</abstract>

Empirical Mode Decomposition in Discrete Time Signals Denoising

<abstract xmlns="http://www.w3.org/1999/xhtml">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.</abstract>

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

<abstract xmlns="http://www.w3.org/1999/xhtml">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.</abstract>

Study on Designing the Extruder for 3D Printers with Pellets

<abstract xmlns="http://www.w3.org/1999/xhtml">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.</abstract>

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

<abstract xmlns="http://www.w3.org/1999/xhtml">The purpose of this paper is to give conditions for the existence and uniqueness of the infinite matrix factorization LU.</abstract>

Existence and Uniqueness of the Infinite Matrix Factorization LU

<abstract xmlns="http://www.w3.org/1999/xhtml">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.</abstract>

Sinthesis on Theories of Quality Management with Application in Wiring Industry

<abstract xmlns="http://www.w3.org/1999/xhtml">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.</abstract>

A Comparative Study Between the Different Modes of Support to Employment

AHEAD OF PRINT

Volume 20 (2023): Issue 2 (December 2023)

Volume 20 (2023): Issue 1 (June 2023)

Volume 19 (2022): Issue 2 (December 2022)

Volume 19 (2022): Issue 1 (June 2022)

Volume 18 (2021): Issue 2 (December 2021)

Volume 18 (2021): Issue 1 (June 2021)

Volume 17 (2020): Issue 2 (December 2020)

Volume 17 (2020): Issue 1 (June 2020)

Volume 16 (2019): Issue 2 (December 2019)

Volume 16 (2019): Issue 1 (June 2019)

Acta Marisiensis. Seria Technologica

 Acta Marisiensis - Seria Technologica is an open access international scientific journal of the Faculty of Engineering and Information Technology of the University of Medicine, Pharmacy, Sciences and Technology of Târgu Mureș, which is published by the University Press under the CC BY 4.0.   Acta Marisiensis - Seria Technologica aims to meet the demand for an international journal bringing together all aspects of research from different areas of knowledge in engineering technologies. The journal fulfils this aim by publishing the original research papers of prominent international researchers. The published articles are discussed in terms of concepts, state of the art research, standards, implementations, running experiments, applications, and industrial case studies. Topics cover a wide range of engineering subjects like: manufacturing, nano and micro technology, information systems, advanced software technology, parallel and distributed computing, power and energy systems, electronics and electrotechnology, optimization techniques, signal and image processing, quality control technology.  Acta Marisiensis - Seria Technologica is an open access journal with all content freely available on the public internet, permitting any users to read, download, copy, distribute, print, search, or link to the full texts of these articles, scrawl them for indexing, pass them as data to software, or use them for any other lawful purpose, without financial, legal, or technical barriers other than those inseparable from gaining access to the internet itself. The only constraint on reproduction and distribution, and the only role for copyright in this domain, should be to give authors control over the integrity of their work and the right to be properly acknowledged and cited.This is in accordance with the BOAI definition of open access.Authors are not charged for the submission or processing of their papers.  Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 