In the design theory for the relational data base model [6] the decomposition of a relation scheme according to some normal form has been advocated for as one means to avoid undesired redundancy and anomalies [7,8,16]. Desired characteristics of such a decomposition in the case of a relation scheme R with an associated set F of functional dependencies are the lossless-join property and the pres...

One of the crucial choices when modelling species distributions using pseudo-absences and background approaches is delineation area to fit model. We hypothesise that there a minimum around geographical centre distribution characterises well enough range environmental conditions needed by survive. Thus, fitting model within this should be optimal solution in terms both quality execution time. Mi...

Polymer network models construct the constitutive relationships of a broader polymer from behavior single chain (e.g. viscoelastic response to applied forces, electromagnetic fields, etc.). Network have been used for multiscale phenomena in variety contexts such as rubber elasticity, soft multifunctional materials, biological and even curing polymers. For decades, myriad developed with differin...

This paper considers a dynamic common agency model of natural resource harvest quota regulation in which both conservationists and harvesters vie to influence the regulator’s quota allocations as well as the choice of regulator. Conservationists tend to benefit from the adoption of regulation since the regulator will reduce the aggregate harvest quota relative to the unregulated equilibrium. Ha...

Artemia salina L.is an important model organism for the world ecosystem, which is very sensitive, easily available, allows to work in laboratory environment, used toxic effect studies, and gives safe results. This study was designed evaluate of water extract fresh underground parts some species five geophyte genera (Arum rupicola var. virescens (Stapf) P.C. Boyce, Cyclamen cilicium Boiss. &...

We present a method to control wave propagation in highly deformable layered media by utilizing elastic insta-bility-induced wrinkling of interfacial layers. The onset of a wrinkling instability in initially straight interfacial layersoccurs when a critical compressive strain or stress is achieved [1]. Further compression beyond the critical strainleads to an increase in the wri...

BOYCE, CURTIS WESLEY. Augmented Reality as a Perceptual Aid in Robot Teleoperation. (Under the direction of Dr. Robert St. Amant). Robots have reached a level of sophistication such that it is now productive to include robot-assisted search teams in urban search and rescue scenarios. The perceptual interface to the human operator is frequently a video display that relays images from a camera on...

Baxter permutations apparently first arose in attempts to prove the “commuting function” conjecture of Dyer (see [I]), namely, if f and g are continuous functions mapping [0, l] into [0, l] which commute under composition, then they have a common fixed point. Although numerous partial results were obtained for the conjecture (e.g., see [l, 3, 7, IO]), it was ultimately shown in 1967 to be false...

How to repair the injured spinal cord is a question that scientists have struggled with for decades. The answer is of course still a mystery. But ask people on the street for their opinion and they will likely offer something like “stem cells” as the solution. I find it amusing (and honestly, a bit annoying) that family and friends continue to ask me if there is anything new with stem cells. My...

When an elastomeric material is subject to sufficiently high temperature, macromolecular network junctions can undergo time-dependent scission and re-crosslinking (healing). The material system then consists of molecular networks with different reference states. A constitutive framework, based on the experimental work of Tobolsky, is used to determine the evolution of deformation of a solid rub...