1204 Submissions

[2] viXra:1204.0100 [pdf] submitted on 2012-04-28 18:43:37

Investigating “overclocking” an Android Mobile Phone with a Designed Experiment

Authors: Glen Gilchrist
Comments: 10 Pages.

Obtaining additional computational speed from a central processing unit by means of driving a computer system at clock frequencies higher than the default settings has long been used as a method to inexpensively “boost” the performance of a computer. With the emergence of so called smart-phones and the openness of the Android operating system, such tweaks have recently been applied to mobile handsets. This paper investigates the performance gains to an off the shelf handset with the custom Skatie Rom (C3C0, 2012) via means of a statistically designed experiment. A Taguchi Orthogonal Array was used to investigate 5 factors, each at 3 levels on the performance as measured with Aurora Softworks Quadrant application. Unsurprisingly the core CPU speed had the largest effect on overall performance, but we demonstrate that CPU Governor (lagfree) and the I/O Scheduler (noop) were also significant at p=0.000, whilst the size of the SD Card Cache is significant to p=0.065.
Category: Statistics

[1] viXra:1204.0077 [pdf] submitted on 2012-04-18 09:37:00

Multivariate Ratio Estimation With Known Population Proportion Of Two Auxiliary Characters For Finite Population

Authors: Rajesh Singh, Sachin Malik, A. A. Adewara, Florentin Smarandache
Comments: 8 Pages.

In the present study, we propose estimators based on geometric and harmonic mean for estimating population mean using information on two auxiliary attributes in simple random sampling. We have shown that, when we have multi-auxiliary attributes, estimators based on geometric mean and harmonic mean are less biased than Olkin (1958), Naik and Gupta (1996) and Singh (1967) type- estimator under certain conditions. However, the MSE of Olkin( 1958) estimator and geometric and harmonic estimators are same up to the first order of approximation.
Category: Statistics