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PurposeThe present study discussed wave propagation in a nonlocal generalized thermoelastic half-space with moving an internal heat source under influence of rotation.Design/methodology/approachNormal mode analysis is introduced to obtain the analytical expressions of the physical quantities.FindingsNumerical results are presented graphically to explore the effects of rotation, the nonlocal parameter, and the time-delay on the physical quantities. It is found that the physical quantities are affected by rotation, the nonlocal parameter, and the time-delay.Originality/valueThe problem is solved based on the classical-coupled theory, the Lord–Shulman theory, and the Green–Lindsay theory with memory-dependent derivative (MDD).

Purpose The purpose of the present study is to discuss the impacts of rotation, inclined load, nonlocal parameter, and an empirical material constant on various physical variables of a fiber-reinforced thermoelastic medium. Methods The present problem was studied using the simple phase-lags (DPL) model. Using normal mode analysis, the precise expressions for the temperature, stress, and displacement components are found. Results Matlab software is used to do numerical computations. Comparisons are done between the outcomes obtained and those expected for various nonlocal parameter values, rotation, an empirical material constant, and inclined load. Conclusion The nonlocal parameter and rotation play a big part in how the physical fields are distributed. The distributions of the physical fields are significantly influenced by the inclined load and an empirical material constant.

Purpose The purpose is to obtain precise expressions of physical fields using the appropriate non-dimensional variables and normal mode analysis. Methods Based on the Lord–Shulman (L-S) theory and taking into account gravitational influences as well as temperature-dependent features, the fundamental equations for a nonlocal thermoelastic solid are developed. Results When a nonlocal thermoelastic media is swapped out for a thermoelastic one, this approach still holds true. Comparisons are done between the outcomes obtained and those expected for various nonlocal parameter values and for an empirical material constant. Additionally, comparisons are done between the outcomes for various gravity field values. Conclusion The nonlocal parameter plays a big part in how the physical fields are distributed. The distributions of the physical fields are significantly influenced by the gravity field.

The present paper is concerned with the analysis of the reflection of waves through a thermoelastic medium with diffusion and mechanical force. The problem is discussed within memory-dependent derivatives in the context of the dual-phase-lag model and Lord and Shulman theory. The harmonic representation of waves method is used to find the solution of the reflection coefficients. On the basis of the solution, it is concluded that after reflection four quasi-waves ( qP , qT , qN , qSV ) propagate through the medium. Comparisons are made with the amplitude ratios of the reflected waves for different values of the magnetic field and gravity. Comparisons are made with the amplitude ratios of the reflected waves for different values of the mechanical force and thermal conductivity. The amplitude ratios of various reflected waves are significantly influenced by thermal conductivity, the angle of incidence and the gravity field.

The effect of rotation on a nonlocal fiber-reinforced visco-thermoelastic media was examined in this work using an modified Green and Lindsay theory (MGL). The problem was resolved by using normal mode method to derive the precise expressions of field quantities. In this technique, one gets exact solution without any assumed restrictions on the field variables. The normal mode technique is applicable to a wide range of problems in thermodynamics and thermoelasticity. Graphical representations of the thermal temperature, displacements and stresses are obtained. Comparisons of the physical quantities are shown in figures to study the effects of nonlocal parameter, rotation, viscosity and reinforcement parameters. Some special cases of interest have also been inferred from the present problem. The results indicate that rotation, nonlocal parameter, viscosity and reinforcing factors have a considerable impact on the fluctuations of the variables under consideration. These impacts are examined and described in depth.

In order to deal with the effects of globalization, urbanization, increase in world population, global warming, and climate change; and according to the Sustainable Development Goals (SDG) 2 targets, which aim to end hunger, achieve food security and improved nutrition and promote sustainable agriculture, it is urgently needed to transform our agriculture and livestock farming systems by taking into account the environmental considerations. The Breeding and management practices of indigenous bovine breeds: Solutions towards a sustainable future (BOVISOL) project is a scientific cooperation between three Mediterranean countries (Greece, Tunisia and Algeria) supported and funded by the European Commission under the European Research Area Networks (ERA-NET) scheme of the 7th Framework Programme. This project has been formed around the hypothesis that the local bovine breeds must be preserved since they possess a valuable genetic pool, and they are a part of the landscape and the biodiversity of rural areas. Moreover, their products (milk, cheese, meat, etc.) could contribute significantly to the local economies as they could easily be associated with recent food trends like “local” and “slow food”, which are considered today, as, not only a mean of nutrition, but also a way of living and a part of people’s identity. BOVISOL project aims to: (i) identify the local breeds and populations in a national level, (ii) describe the existing farm and breeding practices, (iii) analyze the quality of the main local animal products, (iv) propose solutions that will promote the sustainability of the traditional farming systems, especially nowadays that climate change proposes new challenges on animal production, and (v) disseminate the solutions on all the levels of the sector (farmers, scientists, local communities, governmental agencies).

The current study shows the propagation of waves in a fiber-reinforced thermoelastic medium with an inclined load under the effect of Hall current and gravitational force. The problem is analyzed using the Lord–Schulman hypothesis of one thermal relaxation time. A normal mode method is utilized to acquire the analytical result for any boundary condition. Several investigations have been adapted into figures to display the impacts of the gravity field, Hall current, inclined load, and the empirical solid constant on all physical quantities. A comparison is made with the obtained results to indicate the strong impact of the external parameters acting on the phenomenon of mechanical load on the fiber-reinforcement thermoelastic medium.

The goal of this work is to examine the effect of the gravity on a nonlocal fiber-reinforced half-space with reference temperature-dependent material properties. The three-phase lag model, the type III Green–Naghdi theory, and the Lord–Shulman theory all with memory-dependent derivatives are taken into consideration while analyzing the issue. To derive the precise formulations of physical fields, the harmonic wave analysis method is used. To quantify the impact of temperature-dependent on the characteristics of the medium and gravity, graphs are used. It is found that the physical quantities are affected by gravity, the nonlocal parameter, and reference temperature-dependent material properties. The method that was used in the present article is applicable to a wide range of problems in hydrodynamics and thermoelasticity.

The current study aimed at investigating the effects of partial or total substitution of soybean meal with faba bean on reproductive parameters of Queue Fine de l’Ouest rams. Eighteen adult rams (49.8 ± 3.7 kg and 2.4 ± 1.5 years old) were divided into three homogenous groups. Rams received oat hay ad libitum and 3 types of concentrate (33 g/BW0.75) where soybean meal was the main protein source (SBM diet, n = 6), partially (50%, SBMFB diet, n = 6) or totally (100% FB diet, n = 6) substituted in nitrogen basis by local faba bean. The volume of ejaculate, sperm concentration and sperm mortality rate were measured weekly by collecting semen using an artificial vagina. Serial blood samples were collected 30 days and 120 days after the beginning of the experiment in order to assess plasma testosterone concentrations. The results showed that hay intake was affected (P < 0.05) by the nature of the nitrogen source incorporated (1032.3 ± 12.2; 1026.8 ± 56.6 and 972.8 ± 39.05 g DM/d for SBM, FB and SBMFB respectively. The average live weight of the rams increased from 49.8 ± 0.4 (week 1) to 57.3 ± 0.9 kg (week 17) without effect of the diet. A positive effect of faba bean incorporation in the concentrate was observed on ejaculate volume, concentration and spermatozoa production. All these parameters were significantly higher in SBMFB and FB groups than in SBM group (P < 0.05). The protein source did not affect the percentage of dead spermatozoa and the total abnormalities which were similar for the three diets (38.7; 35.8 and 38.1% for SBM; SBMFB and FB, respectively). The mean testosterone concentration was higher (P < 0.05) in rams fed with faba bean (1.7 ± 0.7 to 1.9 ± 0.7 ng/ml for the SBMFB and the FB groups respectively) than in rams fed SBM diet (1.06 ± 0.5 ng/ml). It was concluded that the substitution of soybean meal by faba bean improved the reproductive performance and did not affect sperm quality in Queue Fine de l’Ouest rams.

Purpose The impact of gravity on nonlocal thermoelastic diffusion solid is discussed in this work. Methods The Green-Naghdi theory (G-N II), the Lord-Shulman theory, and the three-phase-lag model all explore the issue. The governing equations are solved using the normal mode technique to get the analytic forms of the displacements, temperatures, force stress tensors, and mass concentration. Using appropriate boundary conditions, the physical fields are calculated and the numerical computations have been carried out with the help of MATLAB programming. Results In the physical domain, numerical results for the field quantities are provided and graphically displayed in both the absence and presence of gravity and the nonlocal parameter. Conclusion Physical variables are affected by nonlocal thermoelasticity as well as the gravity field.