In this study, modification of the mechanical behavior of concrete is studied. Where low concrete resistance can lead to deformation due to changes in mixing ratios and lead to changes in mechanical properties such as stretching, splits, cracks, ratchet, fracture resistance and slip resistance steps. To improve these mechanical properties of concrete and to study its effect on the mechanical properties of hot asphalt mixed, some materials such as flexible scrap and iron filings were added to the mixture with ratio: 5, 10 and 15% of the total weight of aggregate. Also, some results and comparisons between these ratios of addition materials upon the mechanical properties were given.

<p><span>This paper aimed to study how to reduce the amounts of heat transfer from or to the internal space of the building by covering its external walls with many locally available materials, thus reducing the rate of consumption of electrical energy used in adaptation, which leads to reducing energy consumption costs. The researcher built a model room with dimensions (1 x 1 x 2) m on the third floor of a building in Baghdad (L = 33.2 N), the dimensions of its walls (1 x 2 m) east for the installation of the sample, and the other surfaces are insulated with 200 mm polystyrene sheets. Use a 0.5 ton air conditioner to provide the room thermal comfort. The researcher found that the metal sheet with a thickness of 10 mm and covered with an insulating layer of thermoplastics is considered the best among the materials used in construction, as it saves 57% of the electrical energy consumed in air conditioning. While the use of marble, porcelain, Helen stone, and fiberglass slabs with a thickness of 10 mm, comes last because it saves less than 30% of electrical energy.</span></p>

<p>Multiple integral representation (MIR) has been used to represent studying the effect of temperature on the amount of nonlinear creep on the semi- crystalline polypropylene (PP) under the influence of axial elastic stress. To complete this research, the Kernel functions were selected, for the purpose of performing an analogy, and for arranging the conditions for the occurrence of the first, second and third expansion in a temperature range between 20 °C-60 °C, i.e., between the glass transition and softening temperatures, within the framework of the energy law. It was observed that the independent strain time increased non-linearly with increasing stress, and non-linearly decreased with increase in temperature, although the time parameter increased non-linearly with stress and temperature directly. In general, a very satisfactory agreement between theoretical and practical results on the MIR material was observed.</p>

The objective of this study is to conduct an experiment that considers the influence of vertical oscillations on the heat transfer coefficient of free convection in an aluminum flat plate component measuring 3 × 100 × 300 mm. The plate is subject to a steady-state heat transfer; whereby it experiences a sustained heat flux ranging from (250–1500) W/m2. The orientation of the flat plate can be either horizontal or inclined at particular angles, specifically at 0°, 30°, 45°, 60°, and 90°. The experimental tests conducted were characterized by an expanded frequency spectrum ranging from 2 to 16 Hz, a variable amplitude range spanning from 1.63 to 7.16 mm, and a range of Rayleigh number values upon activation of the system, with minimum and maximum thresholds of 138.991 and 487.275, respectively. The impact of vibration frequency upon both the amplitude and velocity of vibrations for a heat flow of 250 W/m2, situated at an angle of θ = 0°, was examined. The impact of the Reynolds number upon the total vibrational heat transfer coefficient, as well as the total Nusselt number, was investigated with and without the presence of angle vibration θ = 0°, across diverse degrees of heat flux. This study investigates the impact of the Rayleigh number on the overall Nusselt number under varying conditions of thermal flux, with and without the application of vibration at angles of θ = 30°, 45°, 60°, and 90°. The findings of this analysis demonstrate that there exists a discernible correlation between the incremental amplitude of vibration and the coefficient of heat transfer, manifesting as a negative slope within the range of 0° to 60°. Such correlation reaches its optimal magnitude of 13.2894% under the condition of flat vibration mode, whereas the coefficient of heat transfer declines progressively as vertical vibration is augmented, culminating in a maximum decline of 7.6475%. The present study reports a decrease in the overall vibrational heat transfer coefficient with increasing vibrational Reynolds number. The total Nusselt number was found to increase with or without vibration as the Rayleigh number increased.

The current study aimed to establish the basic infrastructure to facilitate the implementation of the procedural applications of total quality management, through the introduction of a fully functional total quality management unit in colleges and scientific departments, in line with internationally recognized standards, by meeting ISO 21001: standards for the requirements of the management system of educational institutions 2018 in light of the coronavirus crisis. A questionnaire was printed including all applications and 40 actions distributed to three categories of volunteers: undergraduate students, graduate students, and faculty members at the university. The current study involved the calculation of several key metrics, including the average number of volunteers, the average level of satisfaction across all choices, and the proportion of overall satisfaction attributable to the mean values observed across all groups. The results indicate a relatively low rating of 15 and a satisfaction level of 25.125 among the sample of undergraduates who participated in the study. In the context of postgraduate education, the scale reached a numerical value of 12.1, resulting in a satisfaction rate of 48.4. The responses or alternatives provided by respected faculty members at the university indicated a high level of confidence and clarity. The results indicate that a large percentage of the respondents 62.322 expressed their satisfaction unequivocally in the categorical response of “exactly yes” with a similar frequency of 8.725. The rationale behind their selection can be attributed to various factors, such as their proximity to the deanship, their great experience in university work, their active participation in decision-making processes, and the limited impact of the Corona pandemic. The satisfaction rate of university professors reached 80.57% overall. The graduate student group ranked second, peaking at 70.56%. In contrast, the statistical figures related to undergraduate students were relatively lower, as they ranked third with a rate of 55.21%.