Introduction: Sensory-motor control and in general gaining balance will be impaired after an ankle injury and in fatigue situations. The aim of this research was to study the effect of exercise-based fatigue on static and dynamic balance in mountaineering athletes who were successful in returning to a suitable level of physical activity after an ankle sprain injury. Materials and methods: ...

Existing INS-aided GPS re-acquisition methods use either long coherent integration periods or non-coherent accumulation to obtain the required frequency resolution or acquire low C/N0 signals. Such methods need accurate position or velocity aiding, which is generally unavailable in many signal re-acquisition scenarios that use low-cost receiver oscillators and sensors. Furthermore, in high dyna...

In this paper, we describe a novel approach to scalable group re-keying for secure multicast. Our approach, which we call Kronos, is based upon the idea of periodic group re-keying. We first motivate our approach by showing that if a group is re-keyed on each membership change, as the size of the group increases and/or the rate at which members leave and join the group increases, the frequency ...

A Data Warehouse (DW) is one of the main components of every BI system. It has been convincingly argued that the success of BI projects can be strongly affected by the Requirements Engineering (RE) phase, when the requirements of a DW are captured. Multiple RE methods for DWs have been proposed which have goal models in the core of their approach. Existing methods cover RE up to the static part...

Product Service Systems (PSS) – a combination of software, hardware and service elements – are an emerging trend on the market. Their development encounters different difficulties, amongst them the existence of dynamic cyclic interdependencies. These cycles make the challenging requirements engineering (RE) for PSS even more complicated. Up to now there is no integrated RE approach for PSS. An ...

Integrated IT-management has been a challenging research topic for several years now. However, integrated management of today’s large-scale, dynamic, and multiorganizational IT-systems is still in its infancy. To overcome the difficulties management solutions for such environments have either been re-done from scratch or simply ignored. It would be desirable to re-use well-established managemen...

Amino acid radical generation and transport are fundamentally important to numerous essential biological processes to which small molecule models lend valuable mechanistic insights. Pyridyl-amino acid-methyl esters are appended to a rhenium(I) tricarbonyl 1,10-phenanthroline core to yield rhenium-amino acid complexes with tyrosine ([Re]-Y-OH) and phenylalanine ([Re]-F). The emission from the [R...

recent developments in the area of smart structures indicate that variable geometry / stiffness truss network is of fundamental importance in designing smart transformable structures and systems for space applications. this paper presents the conceptual design and dynamic modeling of a cooperative re-configurabel dual-arm robotic structure called dual-arm cam-lock manipulator. the manipulator i...