The paper addresses dynamic and control issues related to a dynamical model called the classical shimmying wheel. The classical shimmying wheel models the rolling dynamics of many physical rolling systems such as aircraft nose wheels, motorcycles, automotive systems and tractor{ trailer systems. Such system can exhibit undesirable unstable rolling motion, i.e. shimmying, which can often lead to...

The cardiovascular disease is one of most frequent cause deaths in modern society. The objective of this work is analyse the effect of dynamic vascular geometry (curvature, torsion, bifurcation) and pulsatile blood nature on secondary flow, wall shear stress and platelet deposition. The problem was examined as multi-scale physical phenomena using perturbation analysis and numerical modelling. T...

This essay describes the development of groups used for the specification of symmetries from ordinary and magnetic point groups to Fedorov and magnetic space groups, as well as other varieties of groups useful in the study of symmetric objects. In particular, we consider the problem of some incorrectness in Vol. A of the International Tables for Crystallography. Some results of tensor calculus ...

Visualizing 3D continuum or time-varying simulation (scalar) datasets is diicult because of the immense amount of data to be processed and understood. Furthermore , these datasets may contain many evolving amorphous regions, making it diicult to visually follow features of interest. In this paper, we present a process for analyzing continuum datasets and review some of our previous work on feat...

[0.1] Questions about integers and primes It is easy to formulate questions about integers and primes, though not easy to distinguish those questions that have deeper meanings. More than 2000 years ago, contemporaries of Euclid knew that there are infinitely-many prime numbers. Quantifying the distribution of primes is still essentially an open question! Chebyshev (1848-50), Riemann (1857-8), H...

Regardless of profile, whether flat topped or pointed, to the summit observer all mountain peaks cast triangular shadows when the sun is low. A theory for such anomalous shadows is developed. The shadow apex angle is shown to depend only on the ratio of the breadth of the mountain to its height.

In order to ground my approach to the study of paranormal phenomena, I first explain my operational approach to physics, and to the “historical” sciences of cosmic, biological, human, social and political evolution. I then indicate why I believe that “paranormal phenomena” might — but need not — fit into this framework. I endorse the need for a new theoretical framework for the investigation of...

Knowledge of the foot morphometry is important for proper foot structure and function. Foot structure as a vital part of human body is important for many reasons. The foot anthropometric and morphology phenomena are analyzed together with hidden biomechanical descriptors in order to fully characterize foot functionality. For Croatian student population the scatter data of the individual foot va...