Free Torus Actions and Two-Stage Spaces

We prove the toral rank conjecture of Halperin in some new cases. Our results apply to certain elliptic spaces that have a two-stage Sullivan minimal model, and are obtained by combining new lower bounds for the dimension of the cohomology and new upper bounds for the toral rank. The paper concludes with examples and suggestions for future work.Comment: 17 pages, to appear in Math. Proc. Camb. Philos. So

Theoretical Foundations of Learning Communities

This chapter describes the historical and contemporary theoretical underpinnings of learning communities and argues that there is a need for more complex models in conceptualizing and assessing their effectiveness

What’s the Point?: An Exploration of Students’ Motivation to Learn in a First-Year Seminar

This qualitative case study explores how undergraduate students and their instructor made meaning of students’ motivation to learn in a one-credit, pass/fail first-year seminar. The findings point to the importance of addressing structural motivational barriers and ensuring that instructors possess the instructional, motivational, and developmental strategies necessary to foster motivation

Building Bridges: Using the Office Consultation Project to Connect Students to Theory and Practice

The Office Consultation Project is an innovative capstone project that partners graduate students in student affairs preparation programs with academic and student affairs practitioners. It provides an opportunity for students to apply research and scholarship to practical settings, while giving practitioners new insight into their units, additional work support, and expanded professional networks. The project benefits graduate preparation programs by cultivating cross-divisional networking and increasing campus awareness about the student affairs profession that could generate new practicum and assistantship opportunities

Students’ Peer Interactions Within a Cohort and in Host Countries During a Short-Term Study Abroad

In this qualitative case study, we explored students’ peer interactions within their cohort and in the host countries during a short-term study abroad. Framed by Bronfenbrenner’s (1993) ecological systems theory, findings revealed that students spent considerable energy reflecting on interactions with peers. The students considered themselves loners, mediators, messengers, and learners. Findings illustrate the need to attend to students’ differing personal attributes and relationships with peers, as these affect their overall experiences

Lyophilized spore dispenser

A lyophilized spore dispenser is provided which produces a finely divided, monoparticulate cloud of bacterial spores. The spores are contained within a tightly sealed chamber, and a turbulator orifice connected to an air supply source provides a jet of air which stirs up the spores and causes the spores to be suspended in eddy currents within the chamber. This air jet also produces a positive pressure within the chamber which forces the spores out of an injection orifice

Human Dorsal Striatal Activity during Choice Discriminates Reinforcement Learning Behavior from the Gambler’s Fallacy

Reinforcement learning theory has generated substantial interest in neurobiology, particularly because of the resemblance between phasic dopamine and reward prediction errors. Actor–critic theories have been adapted to account for the functions of the striatum, with parts of the dorsal striatum equated to the actor. Here, we specifically test whether the human dorsal striatum—as predicted by an actor–critic instantiation—is used on a trial-to-trial basis at the time of choice to choose in accordance with reinforcement learning theory, as opposed to a competing strategy: the gambler's fallacy. Using a partial-brain functional magnetic resonance imaging scanning protocol focused on the striatum and other ventral brain areas, we found that the dorsal striatum is more active when choosing consistent with reinforcement learning compared with the competing strategy. Moreover, an overlapping area of dorsal striatum along with the ventral striatum was found to be correlated with reward prediction errors at the time of outcome, as predicted by the actor–critic framework. These findings suggest that the same region of dorsal striatum involved in learning stimulus–response associations may contribute to the control of behavior during choice, thereby using those learned associations. Intriguingly, neither reinforcement learning nor the gambler's fallacy conformed to the optimal choice strategy on the specific decision-making task we used. Thus, the dorsal striatum may contribute to the control of behavior according to reinforcement learning even when the prescriptions of such an algorithm are suboptimal in terms of maximizing future rewards

Supporting Second Chances: Employment Strategies for Reentry Programs

The Second Chance Act supports a range of reentry programs around the country, designed to help those returning from jail or prison make a successful transition to life on the outside. In 2008, the Annie E. Casey Foundation commissioned Public/Private Ventures (P/PV) to create a resource that would be useful for Second Chance Act grantees as they develop employment strategies, by distilling lessons from research on a range of employment programs. "Supporting Second Chances" offers concrete suggestions for practitioners, based on a review of relevant literature and P/PV's own extensive experience with reentry and workforce development research and programming. The guide explores strategies in three major areas:Services aimed at helping people find immediate employment;Services that provide paid job experiences to participants; andServices that help people gain occupational skills.For each area, we provide: an overview of the approach, including its history and a brief definition; a high-level summary of the most recent and rigorous research available about the approach; an example of the approach in action; key "takeaways" for Second Chance Act grantees and other programs serving formerly incarcerated individuals; and where to go to learn more.Since the ultimate success of an employment strategy may hinge on a range of additional supports, the guide also features a section called "Beyond Getting a Job," which presents three approaches to help formerly incarcerated individuals get the most out of their paychecks and move into better jobs. The final section synthesizes lessons drawn from across the studies reviewed for the guide