Nonparametric discrimination of time series data

A normality assumption is usually made for the discrimination between two stationary time series processes. A nonparametric approach is desirable whenever there is doubt concerning the validity of this normality assumption. In this paper a nonparametric approach is suggested based on kernel density estimation firstly on (p+1) sample autocorrelations and secondly on (p+1) consecutive observations. A numerical comparison is made between Fishers linear discrimination based on sample autocorrelations and kernel density discrimination for AR and MA processes with and without Gaussian noise. The methods are applied to some seismological data.     

Management control,culture and ethnicity in a Chinese Indonesian company

This study explores socio-cultural aspects of management control in a Chinese Indonesian manufacturing company. Ethnographic data collection methods were combined with grounded theory data analysis to explore how cultures, ethnic differences, history, politics, and commercial considerations shaped management controls. A combination of emic and etic methods were used to generate grounded comparisons with nomethetic research on culture and control in a cultural contingency tradition.     

Infusion administration billing for vedolizumab and infliximab in inflammatory bowel disease

Abstract

Aims: Increasing use of biologics has led to interest in treatment components with potential for cost savings. This study was aimed at comparing administration times and associated costs of infliximab and vedolizumab infusions for inflammatory bowel disease (IBD).

Materials and methods: This study used claims data from the Symphony Health Integrated Dataverse to identify IBD patients using infliximab or vedolizumab between 20 May 2014 and 29 February 2016. Use of Current Procedural Terminology administration codes was evaluated and costs calculated using the 2016 Center for Medicare and Medicaid Services Physician Fee Schedule. Assessments included infusion times, associated costs, productivity loss using average wage estimates from the United States Bureau of Labor Statistics, and home infusion adoption.

Results: A total of 10,051 infliximab and 3114 vedolizumab patients with first-hour claims were identified; 52.0% were female and 64.5% had Crohn’s disease. There were 48,377 infliximab first-hour claims (mean 4.8 infusions per patient); 46,462 (96.0%) had a second-hour claim. In comparison, there were 14,717 vedolizumab claims (mean 4.7 infusions per patient), with only 411 (2.8%) second-hour claims, resulting in vedolizumab cost savings of approximately $1.27 million. The difference in second-hour infusions resulted in 46,051 additional hours of productivity loss with infliximab, and lost wages averaging $1.18 million (range $0.68–$1.77 million).

Limitations: Administration costs were inferred as charge costs and not directly assessed. Productivity loss assessed time spent on infusion only, and included a small proportion of patients beyond working age.

Conclusions: Second-hour infusion billing was significantly lower with vedolizumab than with infliximab, corresponding to cost savings and reduced productivity loss.     

Making accounting degrees fit for a university

This contribution is a commentary on the paper by Chabrak and Craig (2013) that calls for accounting pedagogy reforms that place accounting within its socio-economic context and enable students to formulate critiques and alternatives. It examines four areas pertinent to this: accounting curricula and pedagogy; accounting's relation within universities and to professional accounting institutions; student expectations; and accounting academics. The commentary concurs with the plea of Chabrak and Craig for curriculum and pedagogy reforms but notes the difficulties this faces in the UK (and possibly elsewhere) given the growing commercialisation of and competition between UK universities, and the influence of professional credentialing upon accounting academics who lack knowledge of accounting research. However, there is a public interest need, and a student and employer desire for curriculum and pedagogical reform and university teaching quality systems do not militate against this. The conclusion is that it lies with accounting academics to counter the drift of accounting degrees imitating from professional accounting courses.     

The professional development of European accounting academics: A proposed theoretical framework for future research

Over the last decade there has been a growing interest in the professional development of accounting academics and the effectiveness of their teaching. There is recognition that this development impacts on the primary roles of accounting educators: teaching, research and administration. This paper examines the career stories of accounting educators from different European countries. The aim is to develop a theoretical framework to provide new insights into the process of professional development. The comparative analysis of these career experiences led to the development of a proposed conceptual framework for gaining an understanding of the professional development of accounting educators. Drawing on these findings, the paper proposes that an awareness of the key-factors and the process of professional development of accounting educators may provide a new way of understanding the complex relationships among identities, system of beliefs, and behaviours related to teaching, research and administration.     

Fires and explosions of hydrocarbon oxidation plants

A review of fires and explosions in hydrocarbon oxidation plants, including these caused by decomposition.     

Human problems with computer control: An update

The applications of computer control continue to grow. Incidents can be avoided by the study of previous occurrences. This paper updates “Human Problems with Computer Control” [1] and describes more incidents on computer-controlled plants. As before, the computers provided new and easier opportunities for making familiar errors.