Gamma-Ray Burst Afterglows as Probes of Environment and Blastwave Physics II: The Distribution of p and Structure of the Circumburst Medium

We constrain blastwave parameters and the circumburst media of a subsample of BeppoSAX Gamma-Ray Bursts. For this sample we derive the values of the injected electron energy distribution index, p, and the density structure index of the circumburst medium, k, from simultaneous spectral fits to their X-ray, optical and nIR afterglow data. The spectral fits have been done in count space and include the effects of metallicity, and are compared with the previously reported optical and X-ray temporal behaviour. Assuming the fireball model, we can find a mean value of p for the sample as a whole of 2.035. A statistical analysis Of the distribution demonstrates that the p values in this sample are inconsistent with a single universal value for p at the 3sigma level or greater. This approach provides us with a measured distribution of circumburst density structures rather than considering only the cases of k = 0 (homogeneous) and k = 2 (wind-like). We find five GRBs for which k can be well constrained, and in four of these cases the circumburst medium is clearly wind-like. The fifth source has a value of 0 less than or equal to k less than or equal to 1, consistent with a homogeneous circumburst medium

Policy Recommendations for Concussion Recovery: Using Evidence Based Data for a Safe Return to Learn in Student-Athletes

The return of concussed students and student-athletes to the classroom is commonly referred to as return-to-learn (RTL). RTL, however, is often overshadowed by returning a student-athlete back to athletic competition (return-to-play), with few recommendations and studies evaluating the effect of improper management of recovery from a concussion in an academic setting. Therefore, the research proposed here aims to track how symptom severity, student behaviors, and oculomotor performance formulate our ability to prognosticate how a student will respond to academic stimuli post-injury. This will be achieved by longitudinally tracking student-athletes as they recover from concussion, using a repeated measures design to sample data. The data was analyzed using an analysis of variance mixed effects model to understand the relationship between daily behaviors and symptom prevalence. The study identified overall time, caffeine intake, alcohol consumption, screen time, music listened to, physical activity, sleep duration, step count, and gender as significant factors associated with concussion symptom recovery and classroom management. Linear regression was utilized to correlate RTL recovery time to oculomotor scores, to preliminarily show how these scores can inform medical personnel when a student can return, unrestricted, to the classroom, and the types of accommodations to suggest for use in the classroom during recovery. Additionally, the Rochester Institute of Technology was used as a case analysis of current RTL procedures (athletic and academic management) to find areas of inefficiencies in providing timely and sufficient support to concussed students. The data collected and presented in this study was utilized to develop preliminary, evidence-based RTL guidelines to provide clinicians, athletic training staff, and university stakeholders with policies and practices to better ensure proper care is taken among students recovering from a concussion

Vanderhorst & Miller to Philip Livingston, April 8, 1800

Vanderhorst & Miller wrote from Charleston to Philip Livingston, addressed to New York, NY. They wrote that they were sending, on behalf of Robert Barnwell, Mr. William S. Robinson\u27s bill, favor of Jonathan Coit to be deposited in Susan Kean\u27s account.https://digitalcommons.kean.edu/lhc_1800s/1067/thumbnail.jp

Ocular anatomy histology Powerpoint presentation

This project is a digital photo representation of ocular histology slides, chosen to represent the basic ocular anatomy course as taught at Pacific University College of Optometry. The purpose of this project is to facilitate the study of ocular histology without requiring access to a microscope and histology slides, or to an internet connection. This Microsoft Powerpoint presentation was prepared by topic using digital photos of the ocular histology slides at Pacific University. These photos were taken through the microscope with a four megapixil Olympus digital camera. Multiple photos were taken of each view of interest, and the best representations of given areas were included in the powerpoint presentation. Many of the photos were of sufficient quality that they were requested for use by Dr. Lee Ann Remington O.D .. Twenty-nine of the images were reproduced in the second edition (2005) ofher textbook: Clinical Anatomy of the Visual System. The series of powerpoint presentations, in their varying forms of evolution, have been freely available to students and faculty at Pacific University over the past two years through access to the College of Optometry Web-based server, Victoria. I have received feedback from several first year students. The program was used to assist their study of the laboratory portion of the ocular anatomy course at Pacific University. Those who used the program particularly liked the formatting and accessibility of the images. They were able to view and print the images while studying on personal computers. I have received other feedback noting the convenience of being able to make a single download and having the information on hand, particularly from students without internet access at home. While appreciated by the target audience for which the program was intended, there have been several critiques that the project is redundant. The information provided is viewed in the laboratory portion of the anatomy course, or available through several optometric and ophthalmologic university websites or publications. While this is true, it doesn\u27t take into consideration the benefit to the projected users of the program; namely the ability to study regardless of microscope access or internet availability. Also to be considered is that several of the images are now available in Dr. Remington\u27s new textbook, however I view this as an endorsement rather than a detraction from this thesis project

Associations between Quantitative Mobility Measures Derived from Components of Conventional Mobility Testing and Parkinsonian Gait in Older Adults

Objective: To provide objective measures which characterize mobility in older adults assessed in the community setting and to examine the extent to which these measures are associated with parkinsonian gait. Methods: During conventional mobility testing in the community-setting, 351 ambulatory non-demented Memory and Aging Project participants wore a belt with a whole body sensor that recorded both acceleration and angular velocity in 3 directions. We used measures derived from these recordings to quantify 5 subtasks including a) walking, b) transition from sit to stand, c) transition from stand to sit, d) turning and e) standing posture. Parkinsonian gait and other mild parkinsonian signs were assessed with a modified version of the original Unified Parkinson’s Disease Rating Scale (mUPDRS). Results: In a series of separate regression models which adjusted for age and sex, all 5 mobility subtask measures were associated with parkinsonian gait and accounted for 2% to 32% of its variance. When all 5 subtask measures were considered in a single model, backward elimination showed that measures of walking sit to stand and turning showed independent associations with parkinsonian gait and together accounted for more than 35% of its variance. Cross-validation using data from a 2nd group of 258 older adults showed similar results. In similar analyses, only walking was associated with bradykinesia and sway with tremor. Interpretation Quantitative mobility subtask measures vary in their associations with parkinsonian gait scores and other parkinsonian signs in older adults. Quantifying the different facets of mobility has the potential to facilitate the clinical characterization and understanding the biologic basis for impaired mobility in older adults

Vanderhorst & Miller to Philip Livingston, February 22, 1799

Vanerhorst & Miller wrote from Charleston to Philip Livingston, addressed to Broadway, NY. The letter said that on the instructions of Robert Barnwell they sent a check in favor of Charles Bank and Co. which was to be paid to Susan Kean, widow of John Kean and sister of Philip Livingston. A duplicate of this letter was also sent and received by Philip. The check mentioned can be found as Jonathan Coit to W. S. Robinson, February 21, 1799 .https://digitalcommons.kean.edu/lhc_1790s/1156/thumbnail.jp

Gamma-Ray Burst Afterglows as Probes of Environment and Blastwave Physics

We use a new approach to obtain limits on the absorbing columns towards an initial sample of 10 long Gamma-Ray Bursts observed with BeppoSAX and selected on the basis of their good optical and nIR coverage, from simultaneous fits to nIR, optical and X-ray afterglow data, in count space and including the effects of metallicity. In no cases is a MIV-like ext,inction preferred, when testing MW, LMC and SMC extinction laws. The 2175A bump would in principle be detectable in all these afterglows, but is not present in the data. An SMC-like gas-to-dust ratio or lower value can be ruled out for 4 of the hosts analysed here (assuming Sh4C metallicity and extinction law) whilst the remainder of the sample have too large an error to discriminate. We provide a more accurate estimate of the line-of-sight extinction and improve upon the uncertainties for the majority of the extinction measurements made in previous studies of this sample. We discuss this method to determine extinction values in comparison with the most commonly employed existing methods

SLIDES: The Multi-Species Conservation Program: What it Means for Water Users and the Environment in the Lower Basin

Presenter: Joe Vanderhorst, Metropolitan Water District of Southern California. Respondent on US-Mexico Issues and Other Lower Basin Matters: Bob Johnson, US Bureau of Reclamation. 26 slides

Arnoldus Vanderhorst to John Kean, August 28,1789

Arnoldus Vanderhorst wrote from Charleston to John Kean, addressed to Beaufort, SC. He was writing on behalf of Mr. and Mrs. Williams, and Miss A. Grove. Mrs. Williams and Miss Grove were sisters of John\u27s late step-father, Samuel Grove. He had left them each 1,000 pounds in his will. Arnoldus wrote asking John to send that money and enclosed the relevant documents.https://digitalcommons.kean.edu/lhc_1780s/1299/thumbnail.jp