A new model characterizing the response of a multi-strand wire rope subjected to axial tension and axial torque is presented in this paper. Apart frommost of previous approaches which deal with a straight wire strand, the present model fully considers the double-helix structure in multi-strand configuration. To be further, a new method to compute local deformation parameters (two curvatures and...

The conventional handpump is the most popular technology choice for improved potable water supplies in rural sub-Saharan Africa. To date, however, it has failed to deliver satisfactory levels of sustainability, largely due to inadequate maintenance capacity. An alternative option to standardised imported handpumps is the locally manufactured rope-pump, which is considerably cheaper and easier t...

Numerical simulations indicate that there exist conformations of the unknot, tied on a finite piece of rope, entangled in such a manner, that they cannot be disentangled to the torus conformation without cutting the rope. The simplest example of such a gordian unknot is presented. Knots are closed, self-avoiding curves in the 3-dimensional space. The shape and size of a knot, i.e. its conformat...

OBJECTIVE The aim of this study was to assess sensitivity and specificity of surrogate physical ability tests as predictors of criterion firefighting task performance and to identify corresponding minimum muscular strength and endurance standards. METHODS Fifty-one (26 male; 25 female) participants completed three criterion tasks (ladder lift, ladder lower, ladder extension) and three corresp...

Systems of ocean current power generation are generally moored deep in the seabed. The mooring system is like ropes. ropes very long and can provide tension but not compression, their dynamic displacement large unstable, which different from traditional structures. To generate high-efficiency generation, it necessary to design a stable system. Maintaining stability small invertor significantly ...

[1] The comment by Feng et al. [2010] suggests that the semi‐automated algorithm developed by Cartwright and Moldwin [2008] is not always a reliable method of identifying flux ropes and that the duration distribution of flux ropes in the solar wind is not bimodal. The semi‐automated method was developed in an attempt to remove the subjective nature of visual flux rope identification by using qu...

Problems. The introduction of steel reinforced concrete coatings structures, in our opinion, is preceded by the development methods for monitoring state cable-stayed ropes - creating safe conditions long-term operation structures.
 aim study. Analytical determination dependence internal electrical resistance a rubber cable rope on presence rupture.
 Methods implementation. To control ...

This paper aims to introduce System Dynamics (SD) in applying Drum Buffer Rope (DBR) methodology of Theory of Constraints (TOC) in a three-stage flow shop system that produces a single product. To the best of our knowledge, although there are a lot of TOC applications using discrete simulation in production scheduling with DBR methodology, there are not any TOC application of DBR methodology in...

The suicide act of self-strangulation must be distinguished from homicide, which needs objective scene investigation, autopsy and anamnesis in order to elucidate the manner of death. A 54-year-old man was found dead in public hospital small mosque. There was one nylon rope around his neck, tied together with a knot in the front, under the chin, and rope continuing tightly to right ankle support...