Evaluating the Visual Quality of Watermarked Images

A recent image quality measure, M-SVD, can express the quality of distorted images either numerically or graphically. Based on the Singular Value Decomposition (SVD), it consistently measures the distortion across different distortion types and within a given distortion type at different distortion levels. The SVD decomposes every real matrix into

Supervised semi-automated data analysis software for gas chromatography / differential mobility spectrometry (GC/DMS) metabolomics applications

Modern differential mobility spectrometers (DMS) produce complex and multi-dimensional data streams that allow for near-real-time or post-hoc chemical detection for a variety of applications. An active area of interest for this technology is metabolite monitoring for biological applications, and these data sets regularly have unique technical and data analysis end user requirements. While there are initial publications on how investigators have individually processed and analyzed their DMS metabolomic data, there are no user-ready commercial or open source software packages that are easily used for this purpose. We have created custom software uniquely suited to analyze gas chromatograph / differential mobility spectrometry (GC/DMS) data from biological sources. Here we explain the implementation of the software, describe the user features that are available, and provide an example of how this software functions using a previously-published data set. The software is compatible with many commercial or home-made DMS systems. Because the software is versatile, it can also potentially be used for other similarly structured data sets, such as GC/GC and other IMS modalities

An unresolved problem: freedom across lifetimes

Freedom is one of the central values in political and moral philosophy. A number of theorists hold that freedom (or, relatedly, opportunity) should either be the only or at least one of the central distribuenda in our theories of distributive justice. Moreover, many follow Mill and hold that a concern for personal freedom should guide, and limit, how paternalist public policy can be. For the most part, theorists have focussed on a person’s freedom at one specific point in time but have failed to give proper attention to freedom across time. Given that we care about personal freedom now, we have reason to care about future freedom too. But what kind of distribution of freedom across a person’s lifetime should we promote as a matter of legislation and public policy? I argue that none of the candidate principles for the distribution of freedom across time is plausible. Neither a starting gate view, nor a maximisation nor a sufficientarian view is satisfactory, because none adequately reflects our various reasons to value freedom. I show that this result presents a tough challenge for theories of distributive justice and paternalism that set great store by personal freedom