Time is considered as production resource, which determines the need for its effective use in connection with other production resources. The problem consists in the inconsistency of the results of ...the existing forecasting system of production which are founded on modern concepts of space and time. The theoretical positions of Galilean, A. Lorentz and G. Minkowski were analyzed. A. Einstein’s explanations regarding the use of the velocity of light in vacuum as a constant in the well-known dependency for the generalized four-dimensional space were studied. An attempt is made to solve the applied problem in space and time, taking as a constant, for example, standard or maximum possible, (calculated) productivity.
The paper suggests considering the presence of inelastic shear mechanisms in the direction of the maximum tensile stress and the absence of these mechanisms in the other directions as the main ...feature of a structural material of biological origin. A “cracked fiber in tube” model is used for the study of the effect of interface cohesive strength on the stress intensity factor (SIF) for a crack in the fiber and on the energy absorbed under inelastic shear at the interface of fibers at their fracture. The values of the cohesive strength of the interface between the fibers and the distance between the cracks in the fiber at which the maximum energy is absorbed at material fracture at the stage of the crack growth in the fibers are obtained. This stage precedes the pullout process of the completely fractured fibers.
Background: Rational nutrition management in infants under 3 years is an important part of their adequate development at this age and in future.Objective: Our aim was to evaluate awareness of ...pediatricians and parents concerning rational nutrition management in infants under 3 years.Methods: 300 pediatricians and 300 parents of infants under 3 years who live in Moscow, Ivanovo, and Yaroslavl were enrolled in pilot survey.Results: Pediatricians' recommendations on child nutrition management satisfied the majority of parents (252; 84%), however, less than half of families (135; 45%) followed them. In other cases the child's ration depended on mother's opinion on the matter (96; 32%) and on child's food preference. «Unhealthy» food such as groceries and provision, processed food, spices, seafood, fast food, chocolate, candies, and sweets as well as soda was included in child's ration at the age of 2 and its consumption frequency increased significantly at the age of 3. Pediatricians strongly recommended special dairy for infants from the age of 1 (known as the 3rd formula). In fact, only half of children in Moscow eat them, and 27–30% of children in Ivanovo and Yaroslavl.Conclusion: Harmful breach of nutrition management in infants under 3 years is detected. Evidently, parents are not competent on the question. Optimization of educational activities performed by pediatricians, medical stuff, and mass media is required.
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