Nelson investigated advertising placements for a diverse sample of 28 magazines and concluded that targeting of underage youth by alcohol advertisers was not occurring. Siegel et al. claim that my results suffer from collinearity, but fail to present a comprehensive measure of multicollinearity. For my model, variance inflation factors are within acceptable limits and estimation using redefined...

In this issue, we publish a paper by Flynn (2010), which adds to the extensive literature on how to handle results which lie below the level of detection (non-detects), including the paper we published by Krishnamoorthy et al., (2009) a few months ago. This led us to ask Helsel (2010) to contribute a commentary on the topic. Helsel concludes with four ‘things that I think we should be able to a...

In this paper it will show how unknown density and distribution functions can be modeled semi-nonparametrically via orthonormal series expansions, and how to estimate semi-nonparametric (SNP) models via a sieve estimation approach. As an application I will focus on the mixed proportional hazard (MPH) model with fixed right censoring and unspecified mixing distribution and baseline hazard. I wil...

The detection of gravitational wave usually requires to match the measurement data with a large number of templates, which is computationally very expensive. Compressed sensing methods allow one to match the data with a small number of templates and interpolate the rest. However, the interpolation process is still computationally expensive. In this article, we designed a novel method that only ...

The new R package flirt is introduced for flexible item response theory (IRT) modeling of psychological, educational, and behavior assessment data. flirt integrates a generalized linear and nonlinear mixed modeling framework with graphical model theory. The graphical model framework allows for efficient maximum likelihood estimation. The key feature of flirt is its modular approach to facilitat...

Enterprise information portal benefits and corporate goals How are various claimed EIP benefits related to corporate goals, business processes , and to IT applications? Most discussions of EIP benefits and, for that matter , of benefits of other software alternatives to EIPs, are not tightly coupled to corporate goals and business processes (see Chapter 3). In the EIP literature the discussion ...

This paper describes an integrated system for human emotion recognition. While other techniques extract explicit motion fields from the areas of interest and combine them with templates or training sets, the proposed system compares evidence of muscle activation from the human face to relevant data taken from a 3-d model of a head. This comparison takes place at curve level, with each curve bei...

An automatic stereo panning algorithm intended for live multitrack downmixing has been researched. The algorithm uses spectral analysis to determine the panning position of sources. The method uses filter bank quantitative channel dependence, priority channel architecture and constrained rules to assign panning criteria. The algorithm attempts to minimize spectral masking by allocating similar ...

In this paper we introduce a kind of asymmetric distribution for nonnegative data called log-proportional hazard distribution (LPHF). This new distribution is used to study an asymmetrical regression model for data with limited responses (censored) through the mixture of a Bernoulli distribution with logit link and the LPHF distribution. Properties of the LPHF distribution are studied, maximum ...

The typical experimental procedure for testing stress corrosion cracking initiation involves an interval-censored reliability test. Based on these test results, the parameters of a Weibull distribution, which is a widely accepted crack initiation model, can be estimated using maximum likelihood estimation or median rank regression. However, it is difficult to determine the appropriate number of...