Allostasis, Homeostasis, and the Costs of Physiological Adaptation

Sarah Coste reviews Allostasis, Homeostasis, and the Costs of Physiological Adaptation (edited by Jay Schulkin) for the Quarterly Review of Biology

2018 Pulaski County Education Report Card

Our goal is to help parents, school personnel, community members, and policy makers understand how effectively the students in their community are being served. Pulaski students are demonstrating similar growth in achievement on the ACT Aspire as students in the state overall, but in achievement, graduation rates, and School Quality and Student Success, Pulaski County schools are performing below the state average

Arkansas Teacher Supply

This brief examines teacher supply in Arkansas. Using survey data collected in Spring 2017 and data publicly available from the Arkansas Department of Education, we examine how teacher supply varies by district, grade level, and subject across the state. In particular, we examine characteristics associated with the most favorable teaching supply

Dependence of Domain Wall Structure for Low Field Injection into Magnetic Nanowires

Micromagnetic simulation is used to model the injection of a domain wall into a magnetic nanowire with field strengths less than the so-called Walker field. This ensures fast, reliable motion of the wall. When the wire is located at the edge of a small injecting disk, a bias field used to control the orientation of the domain wall can reduce the pinning potential of the structure. The low field injection is explained by a simple model, which relies on the topological nature of a domain wall. The technique can quickly inject multiple domain walls with a known magnetic structure

The Effects of Social Stress on Voluntary Running Behavior in Female Mice

Regular physical activity (PA) positively impacts physical and mental health outcomes. However, there is a reciprocal relationship wherein stress significantly reduces healthy levels of routine PA. We showed previously that voluntary running behavior of male mice essentially ceases following exposure to a resident-intruder social stress. Here we examined female mice. Female mice were divided into four groups (n=8/group): sedentary/control, voluntary running/control, sedentary/stress, and voluntary running/stress. Running groups were given unlimited access to a running wheel in the home cage for 9 weeks with a nightly average of 6.86 ± 2.5 km. During the ninth week, stress groups were exposed to a single, 6-hour bout of a female-specific, resident-intruder social stress. Plasma corticosterone significantly increased following stress (34.56 ± 13 ng/ml basal to 330.5 ± 95 ng/ml immediately post-stress). Nightly running dropped significantly to 1.72 ± 0.9 km. Unlike male mice where running levels were slow to recover, voluntary running in these female mice returned to normal levels by the second night (5.01 ± 2.5 km). This study shows the sensitivity of habitual running behavior to stress exposure and suggests the utility of this mouse model in exploring the means by which stress negatively impacts routine PA