Using unlabelled data to update classification rules with applications in food authenticity studies

Summary.  An authentic food is one that is what it purports to be. Food processors and consumers need to be assured that, when they pay for a specific product or ingredient, they are receiving exactly what they pay for. Classification methods are an important tool in food authenticity studies where they are used to assign food samples of unknown type to known types. A classification method is developed where the classification rule is estimated by using both the labelled and the unlabelled data, in contrast with many classical methods which use only the labelled data for estimation. This methodology models the data as arising from a Gaussian mixture model with parsimonious covariance structure, as is done in model-based clustering. A missing data formulation of the mixture model is used and the models are fitted by using the EM and classification EM algorithms. The methods are applied to the analysis of spectra of food-stuffs recorded over the visible and near infra-red wavelength range in food authenticity studies. A comparison of the performance of model-based discriminant analysis and the method of classification proposed is given. The classification method proposed is shown to yield very good misclassification rates. The correct classification rate was observed to be as much as 15% higher than the correct classification rate for model-based discriminant analysis.     

Anthropological versus sociological approaches to the study of soccer hooliganism: some critical notes

It is argued that the anthropological approach, as used by Armstrong and Harris, has not generated any breakthrough in the study of soccer hooliganism. In particular, it is suggested that their use of a commonsense rather than a sociological concept of violence vitiates their analysis in several ways, contributing above all to substantial inconsistencies between some of their own empirical data and their general conclusions concerning levels of soccer-related violence. It is also contended that their critique of the ‘figurational’ or ‘process-sociological’ approach followed by the Leicester researchers is based on a confused misrepresentation of that approach. Specifically it is argued (i) that Armstrong and Harris fail to recognize the wide range of methods, including extensive participant observation, used by the Leicester group, (ii) that their attempt to cast doubt on the Leicester group's contention that the core football hooligans come predominantly from the ‘rougher’ sections of the working class is based on nothing more than a priori speculation. In this connection, Armstrong and Harris themselves provide no reliable data on the social class of soccer hooligans in Sheffield, and they seem unaware of the fact that several different sources of data appear to confirm the finding of the Leicester group, (iii) they have misunderstood both the terminology and the reasoning of the Leicester group concerning the ‘rougher’ sections of the working class and their relationship to football hooliganism.     

Textbook Affordability in the Time of COVID-19

Abstract

This article provides a background of the textbook affordability problem affecting students attending United States higher education institutions, both prior to and during the 2019 novel coronavirus disease (COVID-19) pandemic, as well as potential solutions to the problem. Solutions discussed include the availability of open materials in online repositories, publisher responses like inclusive access, institutional incentive programs, and initiatives by library consortia or other statewide programs. The responses of various stakeholders to make textbooks accessible to students during the pandemic are also covered.     

An Examination of Public Private Academic Partnerships: Does Program Success Enhance University Performance Outcomes?

In response to a steady decline in State funding, universities have become heavily involved in a variety of public private academic partnerships (PPAPs) in such areas as medical research, business incubation, technological commercialization, continuing professional education, and intercollegiate athletics. Despite this trend, research which examines if such partnerships actually enhance university funding is rare within the public organization literature. Given this, we focus on university intercollegiate athletics programs, which represent one of the largest PPAPs ever undertaken by universities, to examine whether PPAP success can potentially enhance university performance outcomes leading to increased funding levels. Such programs represent a PPAP because public, private, and academic entities all come together to form an organization (division 1 football at the bowl subdivision level) which seeks to benefit all three entities through sharing resources and responsibilities. Study results showed that athletic success positively influenced a variety of university performance outcome variables such as enrollments and endowments. While results indicate that PPAP success can enhance university funding, we also suggest modifications that should enhance the chances that PPAPs will be successful.