Here below we post a list of
Articles already accepted for publication in Issue 4/(December) 2023 of ‘Hidraulica’ Magazine.
The list displays the article title, author(s) and affiliation(s), and also the article abstract.
Full-length article will be available online only after publication.
- Inertial and Video Methods – A Non-Invasive Approach to Measuring the Human ‘s Upper Limb Joints Biomechanical Parameters
Cristian Radu BADEA1, Paul-Nicolae ANCUȚA1, Sorin Ionut BADEA1, Florentina BADEA1
1The National Institute of Research and Development in Mechatronics and Measurement Technique (INCDMTM), Romania
The correction of the biomechanics of human movements is an extremely important activity both for the civilian environment (in which we include: domestic, lucrative activities and those related to sports training) and for the military, as this allows the optimization of neuromuscular control and also the increase of the efficacy of physical and mental resources allocation, in humans. This fact leads to a reduction of the injury risks, to the correction of certain anatomical-functional deficiencies/limitations and last but not least, it allows the improvement of the individual’s quality of life. The non-invasive character of certain biomechanical analyses gives them a privileged status because the degree of intrusion and discomfort endured by the human subject subjected to the analysis is minimal, a fact that allows a better interaction with him in terms of he’s availability of physical and mental involvement. From the category of these non-invasive systems for biomechanical analysis of motion, as well as of posture, the most used (due to their facilities) are video and inertial ones. They allow qualitative/quantitative evaluations of posture (static determinations) and/or human motion (dynamic determinations).
- Double Gumbel Function Optimization through PSO and Maximum Likelihood for Data Analysis Using AI
Dr. Maritza ARGANIS1, M.Eng. Margarita PRECIADO2
1Universidad Nacional Autónoma de México. Instituto de Ingeniería. Facultad de Ingeniería, México
2Instituto Mexicano de Tecnología del Agua, Jiutepec, Morelos, México
Maximum annual hydrological frequency analysis data series requires techniques use to estimate distribution functions parameters; in case of univariate distribution functions that have more than two parameters, traditional methods complexity, such as the moment’s method, increases. In this research, the five double Gumbel distribution parameters of a function were estimated to approximate maximum annual daily measured rainfall data from a climatological station located at state of Jalisco, Mexico. To achieve this objective, Bing AI tool was used to develop a program in Python language that uses PSO particle cluster optimization algorithm from evolutionary computing using as an objective function the likelihood maximization function. Bing AI was oriented by giving a search interval taken from result reported by a program that uses traditional least squares technique and with this, it was possible to eliminate errors in t AI program that finally gave adjustments with a standard error of 13.858 acceptable for data estimation with return periods between 5 and 30 years standard fitting error.
- Experimental Research on the State of Stress and Deformations of Cylindrical Structures Subjected to Internal Pressure
Assist. Prof. PhD. Eng. Gheorghe Cosmin CIOCOIU1, Assoc. Prof. PhD. Eng. Ion DURBACĂ1, Assoc. Prof. PhD. Eng. Nicoleta SPOREA1, Professor Ph. D. Eng. Alin DINIȚĂ2, Lecturer Ph. D. Eng. Georgiana Luminiţa ENĂCHESCU1, Lecturer Ph. D. Eng. Anca Mădălina DUMITRESCU1
1POLITEHNICA University of Bucharest, Romania
2PETROLEUM-GAS University of Ploiești, Romania
The paper presents the experimental results obtained from the tests carried out on a cylindrical body with variable geometry, subjected to an internal pressure in three steps. The present work discusses the case of a transition without fillet from a thickness of the wall to a smaller one of the cylindrical body, in which case the values of the normal strains and the corresponding stress are determined experimentally. In the present case, strain gauge method was used.
- Photovoltaic Panels’ Downcycling Method that Pushes the Transition to a Circular Economy
Student Miruna-Andreea TOKAR1, Student Iuliu-Ioan LAZĂR1, Assist. Prof. PhD. Eng. Dănuț TOKAR1
1University Politehnica Timisoara, Romania
In the current context regarding energy sources’ problems, it is estimated that a high percentage of waste will be produced from photovoltaic panels, that will put pressure on the environment. Thus, the study focuses on downcycling them by incorporating them into mortars by six new recipes (R1, R2, R3, R4, R5 and R6) that replace the sand by integrating photovoltaic panels’ dust (PVd) and pieces of photovoltaic panels (PVp) (1/3 to 100% of the total amount). All samples were subjected to tensile bending, compression and an economic analysis and were compared with the control sample (R0). As a result of the experimental research, a change in the apparent density of the proposed samples was found, and a general improvement in all areas of testing. The obtained results show that used photovoltaic panels can constitute raw material for the creation of new construction materials.
- Sustainability of Nuclear Energy as a Source of the Future
Student Florin-Alexandru LUNGA1, Student Bogdan-Darian TOADER1, Assist. Prof. PhD. Eng. Dănuț TOKAR1
1University Politehnica Timisoara, Romania
Nuclear power is one of the most profitable, reliable, and low-carbon energies, so it can be seen as a source of the future. The article makes a comparative study between renewable technologies (photovoltaic, wind and nuclear) addressing both classical high-power (LR) and small-scale systems (SMRs) located in electrical energy consumption centres. The study highlights the advantages of nuclear energy in terms of land use, agricultural production, impact on wildlife and finally the possibility of cogeneration. In addition to these advantages, SMRs can provide charging stations for electric vehicles, which are also a solution of the near future.
