Lessons Learned and Next Steps in Energy Efficiency Measurement and Attribution: Energy Savings, Net to Gross, Non-Energy Benefits, and Persistence of Energy Efficiency Behavior

This white paper examines four topics addressing evaluation, measurement, and attribution of direct and indirect effects to energy efficiency and behavioral programs: Estimates of program savings (gross); Net savings derivation through free ridership / net to gross analyses; Indirect non-energy benefits / impacts (e.g., comfort, convenience, emissions, jobs); and, Persistence of savings

Examining the Value of Collaboration Systems in Collocated Teams: A Longitudinal Analysis

This study examines user perceptions regarding the value of collaboration systems from a longitudinal perspective. Resource management support, coordination support, and evaluation support are highlighted as key aspects based on which the users form cognitions about collaboration system value. Based on technology acceptance model and expectation disconfirmation theory, we propose a model that examines the evolution of user cognitions from pre-usage to post-adoption stage. The results show that the basis on which users form their cognitions about collaboration systems change over time. At the pre-usage stage, coordination support was found to be the most important determinant of value. At the post- adoption stage, evaluation support assumed more importance. Further, at the post-adoption stage the impact of confirmation on usefulness perceptions is partially mediated by user perceptions regarding evaluation support, providing interesting insights on the cognition revision process. The study offers implications for research and practice

An Exploratory Study of Information Systems Usage Profiles from a Longitudinal Perspective

Past research on Information Systems (IS) usage has mainly focused on the presence of usage and time of usage from a cross-sectional perspective, which provides limited understanding about what usage profiles exist and how these profiles change over time. We address this gap by leveraging a data set that captures IS usage profiles from IS usage log data over 18 months. Through cluster analysis based on two dimensions (number of IS features used and the depth of such usage), we found that the longitudinal profiles represent five distinct trajectories: minimalists, centrists, maximizers, decliners, expanders. Expanders start with a low usage profile and expand the usage over time, while all other four groups started the usage at a medium or high usage level and then made different adjustments over time. Moving forward it will be interesting to evaluate cognitive and behavioral differences across these profiles

Progression from ocular hypertension to visual field loss in the English hospital eye service

Background There are more than one million National Health Service visits in England and Wales each year for patients with glaucoma or ocular hypertension (OHT). With the ageing population and an increase in optometric testing, the economic burden of glaucoma-related visits is predicted to increase. We examined the conversion rates of OHT to primary open-angle glaucoma (POAG) in England and assessed factors associated with risk of conversion. Methods Electronic medical records of 45 309 patients from five regionally different glaucoma clinics in England were retrospectively examined. Conversion to POAG from OHT was defined by deterioration in visual field (two consecutive tests classified as stage 1 or worse as per the glaucoma staging system 2). Cox proportional hazards models were used to examine factors (age, sex, treatment status and baseline intraocular pressure (IOP)) associated with conversion. Results The cumulative risk of conversion to POAG was 17.5% (95% CI 15.4% to 19.6%) at 5 years. Older age (HR 1.35 per decade, 95% CI 1.22 to 1.50, p<0.001) was associated with a higher risk of conversion. IOP-lowering therapy (HR 0.45, 95% CI 0.35 to 0.57, p<0.001) was associated with a lower risk of conversion. Predicted 5-year conversion rates for treated and untreated groups were 14.0% and 26.9%, respectively. Conclusion Less than one-fifth of OHT patients managed in glaucoma clinics in the UK converted to POAG over a 5-year period, suggesting many patients may require less intensive follow-up. Our study provides real-world evidence for the efficacy of current management (including IOP-lowering treatment) at reducing risk of conversion

A Cross-Sectional Study Exploring the Physical Activity Levels of Afghans and Other South Asian Youth in the UK

Introduction: Participating in regular physical activity (PA) has numerous benefits, such as reducing obesity, chronic degenerative conditions, and depression. Despite many health-related benefits, physical inactivity is increasing in young people worldwide, especially in ethnic minority groups, such as British South Asians (BSAs). The aim of this study was to explore the PA levels of BSAs, specifically focusing on youth from Afghan, Pakistani, Bangladeshi, and Indian groups. Methods: A total of 191 (Afghans N = 44; Bangladeshi N = 39; Indian N = 56, Pakistani N = 52) youth from the West Midlands (UK) participated in this study (mean age 15.4 ± 0.5). The International Physical Activity Questionnaire—Short Form was used to measure PA levels. Data were modelled using a Bayesian approach to determine differences in PA levels. Results: The results indicated that 88.5% Afghans, 80% Bangladeshi, 78.6% Indians and 63% Pakistani reported engaging in <30 min of PA per day. Additionally, boys were more active than girls across all ethnic groups. Discussion: This study highlighted an alarmingly low proportion of young people from each BSA ethnic group meeting the PA guidelines. To the authors’ knowledge, this is the first study to explore and compare PA levels of the young British Afghan population, thus contributing novel findings to the area of BSA PA. Conclusion: Overall, the vast majority of BSA young people failed to meet the recommended PA guidelines of 60 min per day. Future research could utilise objective methods, such as Global Positioning System, pedometers and accelerometery to track and monitor PA levels, and could adopt an ecological approach to explore determinants of PA within each ethnic and gender group

Gubernatorial Reputation and Vertical Tax Externalities: All Smoke, No Fire?

This paper investigates whether reputation-building strategies guide U.S. governors’ responses to changes in federal cigarette taxes (i.e. vertical tax interactions). Using 1975-2000 state cigarette tax data, we find that reputation-building strategies affect the nature of vertical tax externalities. Lame duck governors exhibit a more negative response to changes in the federal cigarette tax. Thus, by reducing the state tax base and by causing a decline in the state tax, an increase in the federal tax rate reduces state tax revenues in states headed by lame ducks

Mass transfer efficiency of a tall and low plate free area liquid pulsed sieve-plate extraction column

Acknowledgements The authors would like to acknowledge Chakwal group of industries for funding the project. Ms. Madiha, Ms. Zona, Mr. Sohaib, Mr. Abdullah, Mr. Mudassar, and Mr. Salahuddin also deserve our acknowledgements for their assistance in different ways.Peer reviewedPublisher PD

Soliton response to transient trap variations

The response of bright and dark solitons to rapid variations in an expulsive longitudinal trap is investigated. We concentrate on the effect of transient changes in the trap frequency in the form of temporal delta kicks and the hyperbolic cotangent functions. Exact expressions are obtained for the soliton profiles. This is accomplished using the fact that a suitable linear Schrodinger stationary state solution in time can be effectively combined with the solutions of non-linear Schrodinger equation, for obtaining solutions of the Gross-Pitaevskii equation with time dependent scattering length in a harmonic trap. Interestingly, there is rapid pulse amplification in certain scenarios