On the Incompatibility of Standard Quantum Mechanics and the de Broglie-Bohm Theory

It is shown that the de Broglie-Bohm quantum theory of multi-particle systems is incompatible with the standard quantum theory of such systems unless the former is ergodic. A realistic experiment is suggested to distinguish between the two theories.Comment: A few technical changes incorporated in section V without any change in conclusion

Picture This: Using photo-research exhibits as science outreach

Is a picture worth a thousand words? This paper discusses a unique science outreach initiative–provocative photo-research exhibits on sexism in science. Gender imbalance in science, technology, engineering, and math (STEM) is not only a concern from a social justice perspective, but also has negative consequences for scientific innovation and the economy, given that lack of workplace gender diversity is associated with lower revenue and returns. Science outreach (i.e., public outreach by scientists) could be particularly impactful in Waterloo, Ontario – a region known as ‘Canada’s Silicon Valley’ that contributes over $30-billion annually to the global economy. Portraying complex social issues using a visual medium has the potential to be accessible to a diverse audience. Images from two photo-research exhibits #DistractinglySexist (2015) and #DistractinglyHonest (2016) were based on social-psychological literature and findings from research by two of the authors (Hennessey and Foster) on the social costs of confronting sexism in science. Feedback indicates that these exhibits are effective outreach tools, and appear to facilitate discussions on sexism in science, and expand the social network of women in science by connecting those in the series and people who engage with exhibit materials

Two-particle interference in standard and Bohmian quantum mechanics

The compatibility of standard and Bohmian quantum mechanics has recently been challenged in the context of two-particle interference, both from a theoretical and an experimental point of view. We analyze different setups proposed and derive corresponding exact forms for Bohmian equations of motion. The equations are then solved numerically, and shown to reproduce standard quantum-mechanical results.Comment: Minor corrections, 2 references added, version to appear in J. Phys.

Internet Exchanges for Used Books: An Empirical Analysis of Welfare Implications

Information technology-enabled exchanges have enhanced the viability of a variety of secondary markets, notably markets for used books. Electronic used book exchanges, in particular, offer a wider selection, lower search costs, and significantly lower prices than physical used bookstores do. The increased viability of these used book markets has caused concern among groups such as the Book Publishers Association and AuthorâÃÂÃÂs Guild who believe that used book markets will significantly cannibalize new book sales. This proposition, while theoretically possible, is based on speculation as opposed to empirical evidence. In this research, we use a unique dataset collected from Amazon.comâÃÂÃÂs new and used marketplaces to estimate the impact of IT-enabled used book markets on new book sales. We use these data to calculate the impact of these secondary market exchanges on consumer and publisher welfare by calculating the cross-price elasticity of new books sales with respect to used book prices. Our analysis suggests that IT-enabled secondary market exchanges increase consumer surplus by approximately $70 million annually. Further, we find that only 15cannibalize new book purchases. The remaining 85lose only$32 million in gross profit annually (about 0.2% of total gross profit) due to the presence of AmazonâÃÂÃÂs used book markets. Further, the additional used book readership gain from these electronic markets may mitigate author losses through increased revenue from secondary sources such as speaking and licensing fees. These surplus changes, combined with the estimated $64 million the used book market added to AmazonâÃÂÃÂs gross profits, show that IT-enabled used markets for books have a strong positive first-order impact on total welfare.Information Systems Working Papers Serie

Sleep Quality: A Mediator in the Pathway of Stress and Cold Symptom Severity

Stress is a known contributor to immune system suppression associated with higher illness susceptibility, including acute infectious respiratory illness or the common cold. Sleep quality is an additional mechanism that may underlie the association between stress and cold symptomatology. Although the associations between stress and sleep and cold symptomatology have been examined separately, little is known about the mechanistic role of sleep in these associations. The present study fills that void by examining archival data from the Common Cold Project (Pittsburgh Cold Study 3). The results indicate sleep quality surfaced as an indirect pathway linking stress to changes in cold severity. Additionally, better sleep was associated with greater changes in cold severity above perceived stress. These findings suggest that better sleep may be associated with less severe symptomatology. Future research should address mechanisms underlying the associations between stress, sleep, and cold symptomatology

Picture This: Using photo-research exhibits as science outreach

Is a picture worth a thousand words? This paper discusses a unique science outreach initiative–provocative photo-research exhibits on sexism in science. Gender imbalance in science, technology, engineering, and math (STEM) is not only a concern from a social justice perspective, but also has negative consequences for scientific innovation and the economy, given that lack of workplace gender diversity is associated with lower revenue and returns. Science outreach (i.e., public outreach by scientists) could be particularly impactful in Waterloo, Ontario – a region known as ‘Canada’s Silicon Valley’ that contributes over $30-billion annually to the global economy. Portraying complex social issues using a visual medium has the potential to be accessible to a diverse audience. Images from two photo-research exhibits #DistractinglySexist (2015) and #DistractinglyHonest (2016) were based on social-psychological literature and findings from research by two of the authors (Hennessey and Foster) on the social costs of confronting sexism in science. Feedback indicates that these exhibits are effective outreach tools, and appear to facilitate discussions on sexism in science, and expand the social network of women in science by connecting those in the series and people who engage with exhibit materials

Sustainability performance measurement : a preliminary classification framework of models and indicators

In this position paper we focus on the diversity of sustainability measurements. Based on existing research on performance measurement, we propose a preliminary classification framework summarizing sustainability models and indicators. By describing illustrative examples, we claim that several models and indicators can be distinguished with their own peculiarities. Having such a framework is interesting for both academia and business to structure the range of models and indicators and to ultimately select the appropriate sustainability measurement approach. The proposed framework should be validated by further research