PTFE is often used in various fields because of its excellent properties such as low coefficient friction, heat resistance, and chemical resistance. On the other hand, non-granulated fine powder agglomerates easily tends to fibrillate, therefore, it difficult supply continuously with high accuracy. The purpose research develop a device that can accurately powder. authors propose new method whic...

The idea of monomiality traces back to the early forties of the last century, when J.F. Steffensen, in a largely unnoticed paper [1], suggested the concept of poweroid. A new interest in this subject was created by the work of G. Dattoli and his collaborators [2], [3] It turns out that all polynomial families, and in particular all special polynomials, are essentially the same, since it is poss...

This talk re-examines some of the evolving interaction between hyperbolic geometry and low-dimensional topology, focussing in particular on some contributions of Murray Macbeath to surface topology.

Cyclone separators are active filtering devices suitable for a variety of industrial applications from conventional cutting oil pumps to recycling liquids. Since the vortex flow inside cyclones is highly complicated, performance and patterns these filters should be thoroughly researched. Liquid–solid mostly use water. Numerical studies on using higher-viscosity oils limited. In this study, liqu...

We develop a model for a random walker with long-range hops on general graphs. This random multi-hopper jumps from a node to any other node in the graph with a probability that decays as a function of the shortest-path distance between the two nodes. We consider here two decaying functions in the form of the Laplace and Mellin transforms of the shortest-path distances. Remarkably, when the para...

The manifesto of ubiquitous computing is traditionally considered to be the justly famous 1991 visionary article written for Scientific American by the late Mark Weiser of Xerox PARC (Weiser, 1991). But the true birth date of this revolution, perhaps hard to pinpoint precisely, precedes that publication by at least a few years: Weiser himself first spoke of “ubiquitous computing” around 1988 an...

In this master thesis the flow behavior and the performance of a bow tunnel thruster at slow forward vessel motion is studied using Computational Fluid Dynamics (CFD). In this Definition Study a literature study is made, fundamental theory is explained and a roadmap for the master thesis is developed. At Royal IHC it is noticed that trailing suction hopper dredgers experience a significant decr...