This study investigates the effectiveness of computer-mediated Engineering Drawing instruction in improving spatial ability namely spatial visualisation and mental rotation. A multi factorial quasi experimental design study was employed involving a cohort of 138, 20 year old average undergraduates. Three interventional treatments were administered, namely Interactive Engineering Drawing Trainer...

This paper presents a sensitivity investigation of the expected busy period for a controllable M/G/1 queueing system by means of a factorial design statistical analysis. We studies the effect of four important factors (parameters) that influence the expected busy period of an M/G/1 system, in which the server operates -policy in his idle period. A 2 4 factorial experimental design is used ...

An algorithmic approach to constructing mixed-level orthogonal and near-orthogonal arrays Quasi Monte Carlo simulations of Brownian sheet with an application to interest rate stochastic string model A method for generating uniformly scattered points on the Lp-norm unit sphere and its application in statistical simulation A new class of model-robust designs A method for screening active effects ...

Nanotechnology is forging era-defining breakthroughs across science and engineering. In particular, one-dimensional nanostructures such as nanowires, nanotubes and nanobelts are widely regarded as critical building blocks for creating the next generation of devices in electronics, optics, energy and biomedicine. Motivated by a practical problem of sequential synthesis of nanowires, we propose a...

The objective of this study was to optimize the physicodynamic conditions of polymeric system as a coating substrate for drug eluting stents against restenosis. As Nitric Oxide (NO) has multifunctional activities, such as regulating blood flow and pressure, and influencing thrombus formation, a continuous and spatiotemporal delivery of NO loaded in the polymer based nanoparticles could be a via...

The objective of this study was the development of a statistical approach for radiolabeling optimization of cysteine-dextran conjugates with Tc-99m tricarbonyl core. This strategy has been applied to the labeling of 2-propylene-S-cysteine-dextran in the attempt to prepare a new class of tracers for sentinel lymph node detection, and can be extended to other radiopharmaceuticals for different ta...

Design of experiments (DOE) methodology was used to identify and optimize factors that influence the degree of functionalization (polycarboxylation) of WS2 INTs via a modified acidic Vilsmeier–Haack reagent. The six factors investigated were reaction time, temperature and the concentrations of 2-bromoacetic acid, WS2 INTs, silver acetate and DMF. The significance of each factor and the associat...