Stress-strain state of slotted grips

The stress-strain state of the slotted grips of broad-range centering clamp mechanisms is theoretically and experimentally investigated.     

Distributed smart system for monitoring the state of complex technical objects

Aspects of the design of measurement systems for monitoring the state of the earthbound infrastructure of complex technical objects are discussed. The concept of smart monitoring systems is introduced, results on the development and multilevel organization of these systems are presented, and the possibility of using wireless sensor networks in them is discussed.     

Macroscopic modeling of slow axonal transport of rapidly diffusible soluble proteins

The purpose of this paper is to develop a macroscopic model of slow axonal transport of soluble proteins which may be transported in axons by both diffusion and active molecular-motor-assisted transport mechanisms. The model relies on the “stop-and-go” hypothesis put forward by Brown et al. [A. Brown, L. Wang, P. Jung, Stochastic simulation of neurofilament transport in axons: the “stop-and-go” hypothesis, Molecular Biology of the Cell 16 (2005) 4243–4255.] according to which the motion of neurofilaments in slow axonal transport does not occur at a constant velocity; instead, neurofilaments move along microtubules alternating between short periods of rapid movement, short on-track pauses, and prolonged off-track pauses, when they temporarily disengage from microtubules. For soluble proteins, diffusion may also play an important role in overall slow axonal transport; to account for this effect governing equations of the dynamic system model developed in Craciun et al. [G. Craciun, A. Brown, A. Friedman, A dynamical system model of neurofilament in axons, Journal of Theoretical Biology 237 (2005) 316–322.] are extended to incorporate diffusivity of off track proteins (proteins unbound to a stationary matrix). The model correctly predicts that the total concentration of organelles forms the bell-shaped wave that spreads out as it propagates toward the axon tip.     

Metrological aspects of the creation of the projected coordinate-time and navigation support system for Russia

Basic trends in the development of a coordinate-time and navigation support system in Russia are considered. Approaches to assure the uniformity of measurements of the parameters of the equipment that comprise the basic support of a future GLONASS system are presented.     

High-temperature X-ray diffraction study of phase transformations in nitrogen-bearing steels

The phase composition, lattice parameters, and residual stresses in the α and γ phases of steels containing 0.14–1.2 wt % N are determined by high-temperature X-ray diffraction at 20–1200°C. A procedure is proposed for the in situ quantitative study of the Cr₂N nitride dissolution kinetics and austenite grain growth when diffraction patterns are taken at high temperatures. The temperature boundaries of the decomposition of the α and γ phases and the temperature of complete dissolution of nitride phases are found. The formation of interphase residual stresses during thermal treatment is considered.