Onsager crosses are particles formed by rigidly connecting three perpendicular, elongated rods of length L and diameter D . We have investigated the behaviour of the virial coe cients of Onsager crosses as a function of the aspect ratio L /D of the rods. The interest in these particles stems from the fact that they should exhibit a cubatic liquid crystalline phase in the limit (L /D ) ® ¥ . It...

A bushing bearing was required between the aluminum connecting rod and the wrist pin to reduce wrist pin bearing wear in a severe application. The bushing could not be machined after assembly and precise control of bearing clearance was achieved by re-sizing (using a mandrel) after assembly. Re-sizing was a critical operation. Too much re-sizing would loosen the bushing pressfit while too littl...

We study the transmission of electromagnetic waves propagating in three-dimensional disordered photonic crystals that are periodic on the average with a diamond symmetry. The transmission has been calculated using the transfer matrix method. We study two different geometries for the scatterers: spheres and rods connecting nearest neighbors. We find that the gaps of the periodic structure surviv...

Background. The double haul is a unique feature of single-handed fly casting and is used in both fly fishing and fly casting competition. The movement behaviour during the double haul has not been investigated in previous research. Objectives. Describe the coordination of the rod and line hauling movements during distance fly casting. Methods. Elite fly casters performed distance castin...

In this paper, we investigated the technical problem of recovery overlength and heavy load conveying booms self-unloading ships. A method folding boom with a hydraulic-four-bar mechanism is presented, by using mathematical model for optimization velocity stationary ADAMS software, data results were obtained. The multi-objective index introduced, discussed. showed that parameters such as angular...

A. D. Kelly General Signal Laboratory Equipment 275 Aiken Road Asheville, NC 28806 Low temperature refrigeration mechanically and thermally stresses a compressor's wrist journal bearing. Knowledge of bearing condition would be useful for self-diagnostics or predictive maintenance, particularly in freezers used for storage of valuable biomedical products. This initial investigation considers ext...

Abstract The control problem of a multi-copter swarm, mechanically coupled through modular lattice structure connecting rods, is considered in this article. system’s structural elasticity deriving the dynamics. devised controller robust against induced flexibilities, while an inherent adaptation scheme allows for asymmetrical configurations and transportation unknown payloads. Certain optimizat...

The fine structure of the cone cell of the rabbit is described and compared wtih that of the rod. The cone outer segment consists of a pile of flattened sacs with two membranes 30 A thick and a regular clear space in between of about 30 A. The membrane of the rod sacs is slightly thicker ( approximately 40 A) and the clear space is less regular and frequently absent in the deeper regions. The d...

BACKGROUND The benefits of posterior lumbar fusion surgery with orthotopic paraspinal muscle-pediculated bone flaps are well established. However, the problem of non-union due to mechanical support is not completely resolved. The aim of the study was to compare the efficacy of polyether ether ketone (PEEK) rod device with conventional titanium devices in the posterior lumbar fusion surgery with...

The morphogenesis of the retinal rods has been studied with the electron microscope in white mice from birth up to the 16th day of age. Observations have been mainly concentrated on specimens of the 8th and 12th days and on the differentiation of the inner and outer segments of the retinal rods. In the morphogenesis of the outer segment three main stages have been considered. The first stage co...