Modeling time series data with semi-reflective boundaries

Time series data are increasingly common in many areas of the health sciences, and in some instances, may have natural boundaries serving as performance guidelines or as thresholds associated with adverse outcomes. Such boundaries may be labeled as semi-reflective, in that the time series values have an increased chance of returning towards middle levels as the boundaries are approached, but boundaries can still be breached. In this paper we review a model that was previously proposed for such data and we investigate its statistical properties. Specifically, this model consists of a third-order auto-regressive projection component, parameterized as a constrained linear combination of linear, flat, and quadratic trends, and an error term that uses a logistic regression model for its sign. We describe and compare a previously-proposed estimation method with a modified version thereof, using computer simulations, as well as data examples from heart monitoring and from a driving simulator. We find that the two methods tend to give different results, with the modified technique having lower bias and more accurate confidence intervals than the previously-proposed method.     

Town–gown relationships: Exploring university–community engagement from the perspective of community members

An increasing number of colleges and universities have developed strategies for community engagement. The engagement, however, has been one-sided in that colleges and universities send students, faculty, and staff members out into the community. The current investigation sought to further broaden the definition of community engagement by exploring the benefits that can be accrued by a university when community members are encouraged to explore the cultural, intellectual, athletic, and artistic benefits that are provided in college and university campuses.     

Infants distinguish and represent pattern as an object feature from externally generated patterns superimposed on real, 3-dimensional objects' surfaces

As infants form object representations, the patterns viewed on objects' surfaces may be challenging to decipher because these patterns may be created from the surface reflectance of an object (an object property) or from an external source, such as a cast shadow. We tested 7 ½-month-old infants' use of cues that specify the source of patterns seen on the surfaces of real, 3-dimensional objects to individuate those objects. Results suggest that when forming object representations based on patterns, 7½-month-olds rely heavily on temporal and depth cues to distinguish patterns inherent to the object from other types of patterns.     

What do midwives fear?

BackgroundThere is evidence that a significant number of women are fearful about birth but less is known about the fears of maternity health providers and how their fear may impact on the women they care for.AimThe aim of this study was to determine the top fears midwives in Australia and New Zealand hold when it comes to caring for childbearing women.MethodFrom 2009 to 2011, 17 workshops were held in Australia and New Zealand supporting over 700 midwives develop skills to keep birth normal. During the workshop midwives were asked to write their top fear on a piece of paper and return it to the presenters. Similar concepts were grouped together to form 8 major categories.FindingsIn total 739 fears were reported and these were death of a baby (n = 177), missing something that causes harm (n = 176), obstetric emergencies (n = 114), maternal death (n = 83), being watched (n = 68), being the cause of a negative birth experience (n = 52), dealing with the unknown (n = 36) and losing passion and confidence around normal birth (n = 32). Student midwives were more concerned about knowing what to do, while homebirth midwives were mostly concerned with being blamed if something went wrong.ConclusionThere was consistency between the 17 groups of midwives regarding top fears held. Supporting midwives with workshops such as dealing with grief and loss and managing fear could help reduce their anxiety. Obstetric emergency skills workshops may help midwives feel more confident, especially those dealing with shoulder dystocia and PPH as they were most commonly recorded.     

‘Do you really want me to tell ya!’ critical learning in engaging young people in contact with the justice system as peer educators with social work students

ABSTRACT

This paper outlines and evaluates an active and experiential learning project, which gave young people involved with the justice system, a voice as peer educators engaging with social work students outside of the traditional educational institution. The project had two key interconnecting elements. Firstly, by engaging a hidden population of young people in a realistic and meaningful way, it enabled them to share their experiences, and allowed students to understand the complexity of what it means to be socially excluded. Secondly, through this active participation process the young people began to see education as a desirable goal.

The project took place over three months and included 10 social work students and 13 young people involved with the justice system. Creative use of multimedia facilitated production of a learning resource to capture the young people’s lived experiences with statutory social work and justice systems. Young people were fundamentally challenged in their beliefs about themselves being involved in education to achieve a qualification. Students were challenged in their creativity and versatility responding to the task, when collaborating with ‘hard to reach’ young people. They were furthermore challenged in terms of their attitudes and assumptions in relation to offending and social justice.     

Bat ecology and public health surveillance for rabies in an urbanizing region of Colorado

We describe use of Fort Collins, Colorado, and nearby areas by bats in 2001–2005, and link patterns in bat ecology with concurrent public health surveillance for rabies. Our analyses are based on evaluation of summary statistics, and information-theoretic support for results of simple logistic regression. Based on captures in mist nets, the city bat fauna differed from that of the adjacent mountains, and was dominated by big brown bats (Eptesicus fuscus). Species, age, and sex composition of bats submitted for rabies testing locally and along the urbanizing Front Range Corridor were similar to those of the mist-net captures and reflected the annual cycle of reproduction and activity of big brown bats. Few submissions occurred November- March, when these bats hibernated elsewhere. In summer females roosted in buildings in colonies and dominated health samples; fledging of young corresponded to a summer peak in health submissions with no increase in rabies prevalence. Roosting ecology of big brown bats in buildings was similar to that reported for natural sites, including colony size, roost-switching behavior, fidelity to roosts in a small area, and attributes important for roost selection. Attrition in roosts occurred from structural modifications of buildings to exclude colonies by citizens, but without major effects on long-term bat reproduction or survival. Bats foraged in areas set aside for nature conservation. A pattern of lower diversity in urban bat communities with dominance by big brown bats may occur widely in the USA, and is consistent with national public health records for rabies surveillance.