Currently in Romania it has been implemented the European Qualifications Framework (EQF) and its sustainability has become an impending need. In this paper, the authors propose an integrating structure, which involves a relatively large number of organizations for the sustainability of the National Qualifications Framework (CNC), while also providing quality assurance in higher education. Using quality management principles and their implementation stages as generic conceptual solutions, there have been established the specific conceptual solutions for the conceptual design of a system which the authors have called the System of Implementation and Sustainability of the National Qualifications Framework in Higher Education (SIS - CNCIS). It was then prepared the detailed design of the SIS-CNCIS for the particular case of implementation in Industrial Engineering.
The rapid prototyping with ice is a new manufacturing technology that can generate three-dimensional objects from ice by depositing and rapidly freezing water layer by layer. In order to freeze the water droplets, the plate must meet certain conditions, among those it is worth to be mentioned, the surface temperature, which should not surpass 0°C. The equipment presented in the paper is a part of rapid freeze prototyping equipment, designed and built by the authors. The authors analysed various freezing systems and they discovered that the classical cooling systems are not appropriate to be used in rapid freeze prototyping technology. The unique solution is the utilisation of thermoelectric cells, generic named as Peltier cells. The modern technology can be used in obtaining Peltier cells, with a high degree of reliability, electrical consumption and yield. This can be successfully used as heat pumps in industry. The author developed an original system that permitted to implement the Peltier cells. The cold plate was designed by using CAD software. In addition, the cold plate was produced and tested. The equipment obtained, has a greater power in comparison with the classical ones, even if it has smaller dimensions. The electrical power supply has to be well filtered in order to generate a higher efficiency. Through the main advantages of the Peltier cells can be mentioned: no maintenance have to be performed as this type of cells have no moving parts, thus having a major advantage; no CFC or other consumables parts have to be used, thus proving to be more economical than other systems; the heat regulation can be performed easier compared with the classical systems offering a better control and precision; it can be used in severe environments where conventional cooling systems can fail, being successfully used in the presence of liquid nitrogen; it can perform in various positions and is reversible similar to heat pumps. The main drawback of this system is that it uses a great amount of electrical energy, consequently can have a low yield.
This paper is an overview reporting on a five stages research program concerning the use of bauxite residue as amendment for rehabilitation the acidic soils. The first two experimental works on this subject deal with: a) Preliminary experiments with particularly selected soil compositions and selected plants from both spontaneous flora and high intensive culture plants, 2012-2014; b) Acid Soils Remediation, Glass house experiment on maize plants growth, 2016-2017; These studies showed that the successful acidic soils remediation required some complementary adjuvant for significant changes in soil agrochemical properties, and for raising the soil fertility up to a reasonable level. In the second and the third stage-Open field experiment on maize plants 2018-2019-three property control adjuvant were used for this purpose: the bauxite residue for pH control, the organic compost as source of organic carbon and better control of the soil properties, and the NPK mineral fertilizers as source of main macronutrients. All these kind of formulations promoted in acidic soils normal vegetative plant growth and significantly rises in maize crop production and quality. The in both glass house and open field experiments on maize plants, the particular targets were: a) analysis and validation the good results of the glass house stage experiments; b) Better understanding of the BR rehabilitation effect on soil properties and composition after first year in a three years rehabilitation program; c) Accumulating credible data about crop outputs and grains quality in the remediated acidic soils. Also, these studies results sustain and bolster the expectations for the next two stages of the research program: a) Open field experiment on wheat plants; Final report 2019 and b) Open field experiment on sun flower plants; Final report 2020.
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