Sadr`aj: Market Overview; Structure and Properties; Brief Description of the Properties of Generic Polymeric Materials; Physical Properties – Characteristic Values – Test Methods and Procedures; Calculation for Structures under Mechanical Load – Examples of Geometrically Simple Structural Parts under Static Loads; Design and Material Consideration for Parts Subjected to Mechanical Loads; Design...

In this paper we study the class of graphs C defined by excluding the following structures as induced subgraphs: thetas, pyramids, 1-wheels and 3-wheels. We describe the structure of graphs in C, and we give a polynomial-time recognition algorithm for this class. We also prove that K4-free graphs in C are 4-colorable. We remark that C includes the class of chordal graphs, as well as the class o...

Introduction Conclusions References

Thtte's Wheels Theorem states that a minimally 3-connected non-wheel graph G with at least four vertices contains at least one edge e such that the contraction of e from G produces a graph which is both 3-connected and simple. The edge e is said to be non-essential. We show that a minimally 3-connected graph which is non-planar contains at least six non-essential edges. The wheel graphs are the...

We find an explicit expression of the Tutte polynomial of an $n$-fan. We also find a formula of the Tutte polynomial of an $n$-wheel in terms of the Tutte polynomial of $n$-fans. Finally, we give an alternative expression of the Tutte polynomial of an $n$-wheel and then prove the explicit formula for the Tutte polynomial of an $n$-wheel.

This paper is concerned with the dynamic response of straddle-monorail single-axle bogie under curve condition. A 15 degrees-of-freedom(DOF) model established for straddle-type monorail vehicle bogie, which consists driving wheels, steering wheels and stabilizing wheels. The motion equations are derived using Lagrange's equation, wheel-rail contact curving track beam created. Compared test resu...

Aluminium disc wheels intended for normal use in passenger cars are commonly produced by gravity casting. If the cooling process and the initial temperature of the mould are not well controlled, shrinkage cavity will occur after solidification, causing leakage in the disc wheel. In this research, a casting simulation software is used to simulate the casting process of aluminium wheels. The cast...

A manual guided vehicle (MGV) is used to handle heavy materials in thin film transistor-liquid crystal display (TFT-LCD) manufacturing clean rooms. This study focuses on evaluating the force exertions and muscle activities in MGV operations. The independent variables include gender, force direction, handle height, load handled and wheel diameter of the MGV. The results show the force direction,...

A class of transition-metal-centered aromatic boron wheels (D(nh)-M©B(n)(q-)) have been recently produced and characterized according to an electronic design principle. Here we investigate the interplay between electronic and geometric requirements for the molecular wheels using the case of VB(10)(-), which is isoelectronic to the decacoordinated molecular wheels, Ta©B(10)(-) and Nb©B(10)(-). P...

Following two months of very successful commissioning and the first science observations on the GBT (see the following articles), operation was suspended in early April, one month earlier than planned, to work on the azimuth track. As described in previous NRAO Newsletters, the azimuth track wear strips, on which the azimuth wheels roll, were shifting slightly in a circumferential direction as ...