This month we demonstrate the use of robust estimators of location using the GNU S-Plus language, "R". R is a statistical programming environment that is a clone of the S and SPlus language developed at Lucent Technologies. In the following document we will illustrate the use of a GNU Web interface to the R engine on the "rss" server, http://rss.acs.unt.edu/cgi-bin/R/Rprog. This GNU Web interfa...

Extreme and non-extreme response styles (RSs) are prevalent in survey research using Likert-type scales. Their effects on measurement invariance (MI) in the context of confirmatory factor analysis are systematically investigated here via a Monte Carlo simulation study. Using the parameter estimates obtained from analyzing a 2007 Trends in International Mathematics and Science Study data set, a ...

Location estimation is a crucial component of location-aware applications. Positioning based on received signal strength (RSS) in wireless networks is considered a promising and inexpensive solution. Existing techniques only use RSS from some fixed access points (APs) deployed within the area of interest to estimate user location. Through experiments on the properties of RSS, it is found that R...

As the number of weblog users increase, RSS readers, which collect update information delivered as RSS feeds from such web sites, become popular to be used. Most of the commonly used RSS readers are in a tasteless style. In contrast, we aim to make a new type of RSS readers with the concepts of ‘pleasure’ and ‘comfort’ in mind. This paper describes two types of visual RSS readers with a high re...

We are witnessing a widespread of web syndication technologies such as RSS or Atom for a timely delivery of frequently updated Web content. Almost every personal weblog, news portal, or discussion forum employs nowadays RSS/Atom feeds for enhancing pull-oriented searching and browsing of web pages with push-oriented protocols of web content. Social media applications such as Twitter or Facebook...

A common use of statistical analysis entails a comparison of groups to one another. The familiar Student’s t-test is used to distinguish whether two groups are significantly different from one another. Starting with a null hypothesis that states there is no difference between the two samples (e.g. ), one proceeds to determine the probability with finding the difference seen in the data if that ...

Last month we examined using the bootstrap and robust estimation to calculate statistical power, this month we explore the use of the smoothed bootstrap with small data sets. The GNU S language, "R" is used to implement this procedure. R is a statistical programming environment that is a clone of the S and S-Plus language developed at Lucent Technologies. In the following document we illustrate...

despite of ever increasing scope and volume of online information content and the constant need for easy accessibility to these contents, experts in various subject matters always face time constraints when searching for information or looking up their intended resource. meanwhile, special libraries are faced with diminishing resources, time and human resource needed for providing services and ...

For a graph G with m edges let its Range of Subgraph Sizes (RSS) ρ(G) = {t : G contains a vertex-induced subgraph with t edges}. G has a full RSS if ρ(G) = {0, 1, . . . ,m}. We establish the threshold for a random graph to have a full RSS and give tight bounds on the likely RSS of a dense random graph. ∗Current Address: School of Mathematics, Georgia Institute of Technology, Atlanta GA30332 †Su...