Autonomous search for a diffusive source in an unknown environment

The paper presents an approach to olfactory search for a diffusive emitting source of tracer (e.g. aerosol, gas) in an environment with unknown map of randomly placed and shaped obstacles. The measurements of tracer concentration are sporadic, noisy and without directional information. The search domain is discretised and modelled by a finite two-dimensional lattice. The links is the lattice represent the traversable paths for emitted particles and for the searcher. A missing link in the lattice indicates a blocked paths, due to the walls or obstacles. The searcher must simultaneously estimate the source parameters, the map of the search domain and its own location within the map. The solution is formulated in the sequential Bayesian framework and implemented as a Rao-Blackwellised particle filter with information-driven motion control. The numerical results demonstrate the concept and its performance.Comment: 11 pages, 7 figure

AIDing Contraception: HIV and Recent Trends in Abortion Rates

Since the onset of HIV/AIDS awareness in the early 1980s, much attention has centered around the substantial negative effects of the disease throughout the world. This paper provides evidence of a secondary effect the disease has had on sexual behavior in the United States. Using a difference-in-differences estimation framework and state level data, we show that the perceived threat of HIV resulted in a drop in unwanted pregnancies, as demonstrated by a lower incidence of abortions. Our results suggest that each additional reported case of HIV per 1,000 individuals resulted in 85.5 fewer abortions per 1,000 live births.HIV, abortion, fertility

Guided self-help cognitive behavioural therapy for depression in primary care : a randomised controlled trial

Peer reviewedPublisher PD

A College Athlete\u27s Return from Severe Aplastic Anemia

Please enjoy Volume 5, Issue 1 of the JSMAHS. In this issue you will find Professional and under graduate research abstracts, case reports, and critically appraised topics. Thank you for viewing this 5th Annual OATA Special Edition

Water Users’ Perspectives: Summary of Withdrawal Survey Responses and Commentary

The state of South Carolina is currently in a multiyear process of updating the State Water Plan, and water demand projections are an important component of that work. Predictions of water demand are inherently uncertain, but perhaps they can benefit from input by a diverse and robust sample of water users. A brief survey regarding water use was distributed to 780 permitted and registered water users in the state, including all water suppliers, industries, and irrigators withdrawing more than 3 million gallons in a month or more than 100,000 gallons in a day. There are 316 responses to 10 quantitative survey items that are summarized, presented, and discussed. Results indicate that most respondents plan to maintain their current levels of water use, consider their withdrawal reports to be accurate within 10%, and believe their current water supplies to be critical to their enterprise. A qualitative review of comments noted on survey responses includes a variety of potential drivers of water demand. The results motivate a discussion of recommendations for future research

PC-CUBE: A Personal Computer Based Hypercube

PC-CUBE is an ensemble of IBM PCs or close compatibles connected in the hypercube topology with ordinary computer cables. Communication occurs at the rate of 115.2 K-band via the RS-232 serial links. Available for PC-CUBE is the Crystalline Operating System III (CrOS III), Mercury Operating System, CUBIX and PLOTIX which are parallel I/O and graphics libraries. A CrOS performance monitor was developed to facilitate the measurement of communication and computation time of a program and their effects on performance. Also available are CXLISP, a parallel version of the XLISP interpreter; GRAFIX, some graphics routines for the EGA and CGA; and a general execution profiler for determining execution time spent by program subroutines. PC-CUBE provides a programming environment similar to all hypercube systems running CrOS III, Mercury and CUBIX. In addition, every node (personal computer) has its own graphics display monitor and storage devices. These allow data to be displayed or stored at every processor, which has much instructional value and enables easier debugging of applications. Some application programs which are taken from the book Solving Problems on Concurrent Processors (Fox 88) were implemented with graphics enhancement on PC-CUBE. The applications range from solving the Mandelbrot set, Laplace equation, wave equation, long range force interaction, to WaTor, an ecological simulation

Addressing Land (In)Justice Through Data Collection In Partnership with Land in Common

In this report we aim to explore and visualize the types of land injustices in the state of Maine in partnership with Land in Common For centuries, Maine has undergone various forms of inequity regarding minority groups and their land. Land in Common is a community land whose mission seeks “to develop a durable, state-wide, democratically run cooperative structure for the ownership, care, and equitable distribution of land in Maine.” Under this umbrella, Land in Common creates affordable housing by separating land from development and bringing it under common ownership. Another important piece of Land in Common’s mission is to return the land we now call Maine back to its original owners, the Wabanaki people. As stated, Land injustice varies tremendously across the state of Maine as you will see in our many figures below. We have scoured the internet, deriving information from ArcGIS, the Agriculture census, and files directly from Land in Common in order to break down who owns land in Maine. The most notable injustice is that there are 7 groups (families and corporations) that own 25% of all land in Maine. This impressive statistic constitutes the efforts of Land in Common. The other 75% of land is privately owned typically by white families, leaving people of color and indigenus groups with a miniscule amount. People of color and indigenous groups have been oppressed across the entire nation for centuries. Although there is ample evidence that constitutes change everywhere, it is apparent that these changes are not easily sprouted. However, this is the essence of this project and Land in Common. Change is the ultimate goal and with our findings we intend to help Land in Common achieve their goals Through our extensive research on how land is broken down by multiple variations across Maine, we aim to display our data in a coherent way for Land in Common to use. Our data is designed for the people of Land in Common to better comprehend the best locations for Land distribution given what and who surrounds certain areas. We also intend to identify different ways to raise awareness of Land in Common in order to receive more donations for their selfless cause. Finally, how could we set up a volunteer program at Bates College that serves as proposal work for students

Stakeholder Engagement: Methods of Inclusion in South Carolina State Water Plan Decision-Making

Stakeholder engagement in natural resource planning has become increasingly important at local and state levels. Including stakeholders in decision-making can increase buy-in and public support of final regional and state recommendations. It can also lead to policy change and improved implementation outcomes resulting from these planning processes. South Carolina is developing a stakeholder-driven water plan, although it is several years away from being finalized. The methods used in this process are a departure from past efforts. Stakeholder inclusion in decision-making in the water planning process is described and analyzed in this article. The focus is on the specific phases of the process and the methods of inclusion used or those anticipated to be used. In this cycle, stakeholder involvement in decisions range from informational/advisory to consultative to decision-making

Personality predictors of levels of forgiveness two and a half years after the transgression

The aim of the present study was to explore whether the domains and facets of the five-factor model of personality predicted motivational states for avoidance and revenge following a transgression at a second temporal point distant from the original transgression. A sample of 438 university students, who reported experiencing a serious transgression against them, completed measures of avoidance and revenge motivations around the transgression and five-factor personality domains and facets at time 1, and measures of avoidance and revenge motivations two and a half years later. The findings suggest that neuroticism, and specifically anger hostility, predicts revenge and avoidance motivation