Drilling thrust force calculations require a large amount of experimental work, which can be greatly reduced, since an extensively validated CAD-based approach, using the DRILL3D software application, has become available. DRILL3D calculates the thrust force of both the cutting areas of the tool (main edges and chisel edge) simultaneously, which means that every simulation can substitute two se...

In this paper a simple tool for seismic design of steel structures for a selected ductility level is presented. For this purpose, a consistent set of earthquakes is selected and sorted based on the maximum acceleration of ground surface. The selected records are applied as the base motion to a single-degree-of-freedom system with strain hardening and the maximum response acceleration is determi...

Original scientific paper The present work aims at obtaining parametric combination to achieve the best surface finish and assess effects of selected process parameters on a laser cut quality for laser cutting. This helps to study the variation in response parameter (Ra value) for various levels of selected process parameters. In the present work mild steel specimen is used and the effect of th...

Experiments in visual cortex have shown that the firing rate of a neuron in response to the simultane­ ous presentation of a preferred and non-preferred stim­ ulus within the receptive field is interm ediate between that for the two stimuli alone (stimulus competition). A ttention directed to one of the stimuli drives the response towards the response induced by the attended stimulus alone (sel...

The preformulation of insoluble drugs, sulfadiazine and aluminium hydroxyde, were studied in order to achieve a suspension with desirable requirements. The objective of the formulator is to avoid the irreversible aggregation called “caking”, and to obtain a suspension with an airy, large volume sediment easily redispersible and with suitable rheological properties. An experimental design useful...

This paper reports the results of the second phase of a research project to characterize and optimize the design of an advanced launch vehicle for human access to low earth orbit. The vehicle makes use of rocket-based combined-cycle (RBCC) propulsion — a concept combining operating modes of an ejector, ramjet, scramjet, and rocket in a single engine. This research builds on previous work focuse...

The inherent unlimited high switching frequency of the sliding mode controller (SMC) is limited by practical constraints hysteresis modulation (HM) technique. inductor current and output voltage a converter can be regulated using combination HM-SMC. However, HM-SMC results in variable operation, which not preferred due to Electromagnetic Interference (EMI) issues. In this paper, an interval fuz...

Robust design optimization (RDO) of large-scale engineering systems is computationally intensive and requires significant CPU time. Considerable computational effort still required within conventional meta-model assisted RDO frameworks. The primary objective this article to minimize further the requirements by developing a global two-layered approximation based technique. in inner layer approxi...