In light of the global focus on greenhouse gas emissions, energy consumption of communication networks has become an important research area. Networks are major energy consumers and are generally dimensioned for peak loads. For extended periods, resources consume power, but are lightly or unused. This research investigates the concept of dynamic topologies, i.e. networks that adapt their topolo...

We developed and realized a mechanical integration concept of prism-grating-prism-assembly for the CO2M mission. The design mounts relies on kinematic mounting optical elements. Additional, ultra-light blackened covers stray light disturbance suppression are included. complete assembly was investigated by extensive thermo-mechanical simulations to verify stability under operational, launch load...

LEDs are likely to be used for general lighting applications due to their high efficiency and longer life. To cover wide output range on lighting application some of control methods are adopts. In the proposed method, the interleaved DCM fly back converter is favoured. DCM operation can accomplish high PF for wide output power range. To achieve high efficiency, new pulse duty cycle control meth...

Non-synchronous breakage or line failure in power systems with light or no loads can lead to core saturation in transformers or potential transformers. This can cause component and capacitance matching resulting in the formation of resonant circuits, which trigger ferroresonance. This study employed a wavelet transform for the detection of ferroresonance. Simulation results demonstrate the effi...

this paper deals with the solution of a column with balcony loads. it is intended to determine the expressions for deflections and bending moments of the sections of a column under the action of transmitted loads from a balcony loaded at its free end by a force «p» and rigidly connected to the column somewhere between its ends. the action of this load on the column is equivalent to that of the ...

One of the main tasks of engineers is to design structural systems light and economic as possible, yet resistant enough to withstand all possible loads arising during their service life and to absorb the induced seismic energy in a controlled and predictable fashion. The traditional trial-and-error design approach is not capable to determine an economical design satisfying also the code require...

Suspended particulate matter (SPM) strongly alters the trophic environment of photosymbiotic aquatic organisms. At high particles loads, phototrophic energy gains can be diminished due to light absorption by suspended particles, and stress from particle abrasion or deposition on tissues. However, energy gains are enhanced if organisms are able to use SPM as a food source. For photosymbiotic ben...

This report is an update of the review for ramp-based baggage handling related literature undertaken in 2005 (Tapley and Riley, 2005). The aim of this review is to present information relating to alternative methods of loading narrow-bodied aircraft that reduce the manual handling related injury and ill-health risks to the handlers, and to identify knowledge gaps. This was used to inform subseq...

Transmission of interactive multimedia streams requires stringent Quality-of-Service (QoS) guarantees in delay, delay jitter, and bandwidth, which imposes strict resource constraints on the paths being used. While the general problem of finding a path that meets multiple QoS constraints is NP complete, we have shown that such a path can be found in polynomial time if the network service discipl...