A cellular concrete with a fine porous structure was experimentally made using the corrosion technique for aluminum powder as an expanding agent in an aqueous solution of Ca(OH)₂. The originality of this paper was the use of our own production method for the fine aluminum powder through atomizing the recycled molten waste of this metal using concentrated jets of nitrogen. Additionally, the waste melting technique involved our own microwave heating method. A high weight proportion of calcined gypsum (maximum 82.3%) represented the main concrete binder. Using moderate contents of coal fly ash (3.6–11.1%) together with perlite (4.6–6.4%) to reduce the pore size and silica fume (0.3–1.2%) with pozzolanic properties, the aim was to obtain a macrostructure characterized by a very low pore size and to increase the compressive strength (by up to 4.1 MPa), despite the relatively low density (below 641 kg/m³). An industrial method of increasing the mechanical strength by steam curing fresh concrete was applied.

The paper covers the issue concerning the current recruitment systems in higher education, a European-level starting point of the reform launched by the Bologna Process in 1999. The Bologna Process was born in 1999 as an intergovernmental collaboration agreement in the higher education system. Its objective was to build a European higher education area based on principles and criteria shared between the participating countries. Twenty-five years after the agreement came into force, it is possible to take stock of the effects that European rules have had on the processes of hiring teaching staff (researchers, associate professors and full professors). While on the one hand the reform has introduced a standardization of processes (strength), on the other hand some critical issues (weaknesses) have been identified. The current recruitment systems in higher education are unsatisfactory, due to repeated gaps in the ethical profiles of the procedures, which have produced two collateral effects: 1) an increase in administrative appeals and 2) an increase in the average age of successful candidates. The paper proposes an innovative and theoretical e-recruitment model named NCHE-4-R-AP-FP to overcome these critical issues. The model identifies the need to transform the present procedures from non-comparative procedures to comparative procedures, should change its name and become the reference procedure for all three academic levels. Therefore, it would be possible to foresee the creation of 1) a comparative procedure for researchers, which should evaluate only research activity; 2) a comparative procedure for full and associate professors, which should evaluate research, teaching, institutional and third mission activities (with the exclusion for the latter of those already included in research activity, such as patents). The fundamental differences between the model and existing ones are: 1) AI integrated into current e-government processes, 2) abolition of physical evaluation committees and 3) transformation of recruitment processes into e-recruitment processes. The advantages of the proposed model consist in overcoming the previously exposed critical issues, although the most archaic academic system itself will probably advance the greatest resistance to the proposal.

A glass foam with good thermal insulation characteristics (apparent density of 0.38 g/cm³, porosity of 81.9% and thermal conductivity of 0.089 W/m·K), high compressive strength (3.9 MPa) and a satisfactory microstructural homogeneity with pore size between 0.6–1.0 mm was obtained by sintering at 927 °C of flat glass waste, a glass waste usually not used in the manufacture of glass foam. The manufacturing recipe has been improved by the simultaneous use of two microwave susceptible foaming agents (SiC and Si₃N₄) and the addition of coal fly ash and an oxygen-supplying agent (MnO₂). The originality of the work was the simultaneous use of the two foaming agents and also the application of the technique of predominantly direct microwave heating, compared to the conventional heating methods commonly used in the manufacture of glass foam. The remarkable energy efficiency of the microwave heating technique led to high average heating rates without affecting the structural homogeneity and very low specific energy consumption.

The article presents the main advantages of electric arc furnace (EAF): it has a great contribution to reintroduce significant quantities of reusable metallic materials in the economic circuit, it constitutes itself as an important part in the Primary Materials and Energy Recovery (PMER), good productivity, good quality / price ratio, the possibility of developing a wide variety of classes and types of steels, including special steels and high alloy. In this paper it is presented some important developments of electric arc furnace: vacuum electric arc furnace, artificial intelligence expert systems for pollution control Steelworks. Another important aspect presented in the article is an original block diagram for optimization the EAF management system. This scheme is based on the original objective function (criterion function) represented by the price / quality ratio. The article presents an original block diagram for optimization the control system of the EAF. For designing this concept of EAF management system, many principles were used.

The article takes as a starting point several complementary definitions of marketing. Also present several key points related to marketing policy: defining the position that the company will occupy on the market with respect to competition, fixing the image with what will approach the market, achieving a balance between turnover rates profit and expenses as a condition for the survival of the company. In below article it is proposed an original concept of marketing management. This concept takes into consideration on the one hand correlations between company position in the market definition and on the other hand the image received by customers. The ultimate goal of this original concept of marketing management is to ensure an effective balance between: the turnover rate of profit and expenses of the company.