Contact-Complex Riemannian Submersions

A submersion from an almost contact Riemannian manifold to an almost Hermitian manifold, acting on the horizontal distribution by preserving both the metric and the structure, is, roughly speaking a contact-complex Riemannian submersion. This paper deals mainly with a contact-complex Riemannian submersion from an η-Ricci soliton; it studies when the base manifold is Einstein on one side and when the fibres are η-Einstein submanifolds on the other side. Some results concerning the potential are also obtained here.

Implications for culture contact history from a glass artefact on a Diingwulung earth mound in Weipa

This paper reports on a glass artefact found on an earth mound at Diingwulung in Wathayn Country, near Weipa, far north Queensland. Despite intense research efforts and cultural heritage management surveys over many years, and the fact that they have been reported commonly within the ethnographic literature, such artefacts have been found rarely outside of Aboriginal mission contexts. As well as describing the artefact, its location and the frontier contact complex of the area, this paper includes the background of knapped glass artefacts in Australia, archaeological and ethnographic descriptions of Indigenous glass use in far north Queensland and the methodology of glass artefact analysis. Although it is only a single artefact, we argue that this glass piece has much to reveal not only regarding its chronology, use, and the function of the site where it was found, but also about culture contact, persistence of traditional technology, connections to Country and the continuity and extent of post-contact Indigenous occupation of the area.

Reduction of Actuation Loads in a Self-Deploying SMA-Based Slat-Cove Filler for a Transport Aircraft

During low speed maneuvers such as approach and landing, a significant component of the total environmental noise produced by a typical transport aircraft is associated with flow over the airframe, termed airframe noise. A key contributor to airframe noise is the leading-edge-slat, a high-lift device. Previous work showed that a slat-cove filler (SCF) may be effective at reducing the slat noise and optimal designs for an SMA-based SCF have been determined, considering stow/deploy and aerodynamic loads as well as other constraints for two realistic airframe configurations such that actuation force was minimized as the design objective. The objective of this current work is to further reduce the actuation force required to retract the SCF by an auxiliary method. The methods considered for force reduction are 1) utilization of structural instabilities in the SCF, 2) addition of auxiliary SMA actuators, and 3) replacement of selected metallic regions of the SCF with more compliant polymer-based alternatives. These methods are investigated using finite element analysis (FEA) models based on a physical bench-top model developed previously. The FEA models are also capable of modeling contact, complex load cases, and they benefit from the use of a custom user subroutine that captures the pseudoelastic response of SMA materials. For each of the three force reduction concepts considered, design optimizations are conducted using open source optimization codes and the non-dominated sorting genetic algorithm. An overall best design is proposed.

On canonical-type connections on almost contact complex Riemannian manifolds

We consider a pair of smooth manifolds, which are the counterparts in the even-dimensional and odd-dimensional cases. They are separately an almost complex manifold with Norden metric and an almost contact manifolds with B-metric, respectively. They can be combined as the so-called almost contact complex Riemannian manifold. This paper is a survey with additions of results on differential geometry of canonical-type connections (i.e. metric connections with torsion satisfying a certain algebraic identity) on the considered manifolds.

The development of the blood clotting initiation conceptions: from A.A. Schmidt to D.M Zubairov

The objective of the review is to cover the formation of modern understanding of molecular mechanisms of blood coagulation initiation. It was provided mainly by the research of Professor D.M. Zubairov and his colleagues. Since 1963, he has established that blood coagulation initiation is not connected to the phenomenon of vascular wall moistening and contact complex factors activation. Research of the thromboplastic activity distribution in tissue cells, blood and in the serum phospholipid microparticles allowed to conclude that blood coagulation is initiated by long-term expression of tissue factor and rapid massive alterations in cellular membranes. This was confirmed by the detection of the turned phospholipids mesophases in tissue thromboplastin preparations and heterogeneity of vitamin К-depending factors binding. Based on the results of the research, a functional conception of blood coagulation initiation by phase alteration of bilayer structure of cellular membranes to a mesomorphic structure was developed. It is caused by different agonists through receptor dependant Са 2+-mobilizing cell signal systems or by massive migration of calcium ions into the cell at its damage. An initial bioimitating non-enzymatic proteolysis vitamin of К-dependant factors and their massive enzymatic activating in the ensembles of enzymatic complexes takes place on heterophase phospholipids surface. Clotting is limited by blood and tissue macrophages, removing cells and phospholipids particles with heterophase surface from cell circulation, and also by anticoagulant factors action. Based on this conception, the researches revealed the pathogenetic of role thrombogenic micro vesicles originating form the cellular membranes transformation in the development of disseminated intravascular coagulation syndrome, myocardial infarction, leucosis, autoimmune and infectious diseases. Finding out the basic concepts of blood coagulation initiation mechanism puts D.M. Zubairov in one row with scientists, pawning the bases of modern biology and medicine.