The Development of Bio-Inspired Cortical Feature Maps for Robot Sensorimotor Controllers

Full version unavailable due to 3rd party copyright restrictions.This project applies principles from the field of Computational Neuroscience to Robotics research, in particular to develop systems inspired by how nature manages to solve sensorimotor coordination tasks. The overall aim has been to build a self-organising sensorimotor system using biologically inspired techniques based upon human cortical development which can in the future be implemented in neuromorphic hardware. This can then deliver the benefits of low power consumption and real time operation but with flexible learning onboard autonomous robots. A core principle is the Self-Organising Feature Map which is based upon the theory of how 2D maps develop in real cortex to represent complex information from the environment. A framework for developing feature maps for both motor and visual directional selectivity representing eight different directions of motion is described as well as how they can be coupled together to make a basic visuomotor system. In contrast to many previous works which use artificially generated visual inputs (for example, image sequences of oriented moving bars or mathematically generated Gaussian bars) a novel feature of the current work is that the visual input is generated by a DVS 128 silicon retina camera which is a neuromorphic device and produces spike events in a frame-free way. One of the main contributions of this work has been to develop a method of autonomous regulation of the map development process which adapts the learning dependent upon input activity. The main results show that distinct directionally selective maps for both the motor and visual modalities are produced under a range of experimental scenarios. The adaptive learning process successfully controls the rate of learning in both motor and visual map development and is used to indicate when sufficient patterns have been presented, thus avoiding the need to define in advance the quantity and range of training data. The coupling training experiments show that the visual input learns to modulate the original motor map response, creating a new visual-motor topological map.EPSRC, University of Plymouth Graduate Schoo

How Art Can Be Used to Grieve and Heal: Making Altered Books with Parentally Bereaved Adolescents

Death is a natural and inevitable part of life. The grief response to death is also natural, yet children’s grief is often overlooked. Many believe that children are not capable of grief because their brains are still developing or that they do not understand what death is and therefore cannot grieve. It is true that a child will grieve differently than an adult, but they still experience grief. This paper focused on children and adolescents who have experienced the death of a parent and how they use art to grieve in a healthy way. Existing research supports the benefits of using art therapy with children who are grieving, and a literature review was done documenting and reviewing the research. The method that was used in this paper was the making of altered books in an open art studio grief group of 6 adolescents. The results of the method were that the altered books served as a way for the participants to tell their story with the use of expressive arts

A randomised comparison of bolus phenylephrine and ephedrine for the management of spinal hypotension in patients with severe preeclampsia and a non-reassuring fetal heart rate trace

Background: Studies in healthy patients undergoing elective caesarean delivery show that ephedrine used for spinal hypotension is associated with increased fetal acidosis compared with phenylephrine. This has not been investigated prospectively in severe preeclampsia. Methods: Patients with severe preeclampsia requiring caesarean delivery for a non- reassuring fetal heart tracing were randomised to receive bolus ephedrine (7.5-15 mg) or phenylephrine (50-100 μg) for spinal hypotension. The primary outcome was umbilical arterial base deficit. Secondary outcomes were umbilical arterial (UA) and venous (UV) pH and lactate level, venous base deficit, and Apgar scores. Results: A total of 133 women were included;; 64 required vasopressor treatment and were randomised to 2 groups of 32 with similar patient characteristics. Pre- delivery blood pressure changes were similar in the 2 groups. There was no difference in mean [SD] UA base deficit (-4.9 [3.7] vs -6.0 [4.6] mmol·L⁻¹ for ephedrine and phenylephrine respectively;; P = 0.29). Mean [SD] pH (UA and UV) and lactate levels were also similar between groups (7.25 [0.08] vs 7.22 [0.10], 7.28 [0.07] vs 7.27 [0.10], and 3.41 [2.18] vs 3.28 [2.44] mmol·L⁻¹ respectively). In addition, UV PO₂ was higher in the ephedrine group (2.8 [0.7] vs 2.4 [0.62]) kPa, P = 0.02). There was no difference in 1- or 5-minute Apgar scores, numbers of neonates with 1-minute Apgar scores < 7 (10/32 [31%] vs 12/32 [38%]), or with a pH < 7.2 (6/31 [19%] vs 8/29 [28%]). Conclusions: In patients with severe preeclampsia and fetal compromise, fetal acid-base status is independent of the use of bolus ephedrine vs phenylephrine to treat spinal hypotension

06. The Jester\u27s Embrace

https://crossworks.holycross.edu/poetry2023/1006/thumbnail.jp

Framing effects in a competitive environment: Black Lives Matter versus President Trump

How is public opinion in the United States affected by the president and the Black Lives Matter social movement’s competing frames on racial inequality? Political elites have used frames to shape public opinion on a multitude of issues, showing success in select and specific conditions. However, it seems that competition, a moderator of framing effects, is always present in politics, especially between a social movement and president. I expand upon the theory that, in competitive environments, repetition or recent exposure increases a frame’s accessibility in memory, therefore the “loudest” of the two frames is the one that influences opinion. To examine this claim, I conducted a content analysis to discern the frames presented frequently by the elite actors and I conducted a survey experiment measuring the influence of each frame on public opinion compared to a control group. I found that when presented with either the Black Lives Matter\u27s racism frame or President Trump’s law and order frame, opinion shifted favorably towards the existence of racial inequality and less hostility toward black Americans. This adds to the limited literature on the impact of social movements’ frames on public opinion as well as the consequences of unpopular presidents on public opinion

Sanctuaries

Sanctuaries navigates the environment of home via interrelated essays and vignettes personal to my upbringing in rural Southwest Indiana. By exploring my own childhood, youth, and family traumas and successes, I have crafted a collection that speaks volumes about seeing the world from a perspective both privileged and underprivileged simultaneously. I uncover my lineage\u27s numerous bouts with physical and mental illness and unrealized dreams, but I also bring to light our traditions of spreading kindness, treading lightly in the world, and preparing inordinate amounts of food and festive cheer to balance out times of hardship. Few writers have attempted to paint the Southern-Midwest\u27s landscape and to characterize its people as more than caricatures caught between the factories of the north and the tobacco fields of the south, so I rose to that challenge. What results is an essay collection rife with excess and squalor, abandon and abandonment, humor and deep sorrow, atheism and fervent belief in the supernatural, and snippets of what it really means, by my home region\u27s estimation, to be part of a family

Optimal dynamic control of invasions: applying a systematic conservation approach

The social, economic, and environmental impacts of invasive plants are well recognized. However, these variable impacts are rarely accounted for in the spatial prioritization of funding for weed management. We examine how current spatially explicit prioritization methods can be extended to identify optimal budget allocations to both eradication and control measures of invasive species to minimize the costs and likelihood of invasion. Our framework extends recent approaches to systematic prioritization of weed management to account for multiple values that are threatened by weed invasions with a multi-year dynamic prioritization approach. We apply our method to the northern portion of the Daly catchment in the Northern Territory, which has significant conservation values that are threatened by gamba grass (Andropogon gayanus), a highly invasive species recognized by the Australian government as a Weed of National Significance (WONS). We interface Marxan, a widely applied conservation planning tool, with a dynamic biophysical model of gamba grass to optimally allocate funds to eradication and control programs under two budget scenarios comparing maximizing gain (MaxGain) and minimizing loss (MinLoss) optimization approaches. The prioritizations support previous findings that a MinLoss approach is a better strategy when threats are more spatially variable than conservation values. Over a 10-year simulation period, we find that a MinLoss approach reduces future infestations by ~8% compared to MaxGain in the constrained budget scenarios and ~12% in the unlimited budget scenarios. We find that due to the extensive current invasion and rapid rate of spread, allocating the annual budget to control efforts is more efficient than funding eradication efforts when there is a constrained budget. Under a constrained budget, applying the most efficient optimization scenario (control, minloss) reduces spread by ~27% compared to no control. Conversely, if the budget is unlimited it is more efficient to fund eradication efforts and reduces spread by ~65% compared to no control

English Studies as a Site for Healing: A Conversation about Place-Based and Indigenous Pedagogies in the English Classroom

This article summarizes a roundtable discussion from the 2016 Alaska Native Studies Conference among professors and students from two English Studies courses at the University of Alaska Anchorage: History of the English Language and History of Rhetoric. Jennifer and Heather discuss how the courses are traditionally taught and how they redesigned the courses to incorporate place-based and indigenous pedagogies. Then, Tayler, Samantha, Hailey, and Arlo--students from a range of backgrounds who took one or both of the classes--describe how the courses encouraged them to develop critical perspectives, build new knowledge through undergraduate research, and experience personal and professional transformations that led to advocacy. The dialogue provides a range of pedagogical perspectives and considers English Studies as a potential site for cultural and historical healing.Ye