Meteoroid Orbital Analysis: Connecting Meteorites and Asteroids

Since people started studying meteorites, scientists have attempted to better understand the parent bodies they originated from. Although, this is difficult because, unlike a terrestrial rock, you do not have access to the outcrop. The Near-Earth Object (NEO) population is the source of all meteorites found on Earth. Using the orbital data collected from the Desert Fireball Network, my work clarified the connections between meteorites and their source NEOs. I primarily did this analysis by employing rigorous numerical modeling techniques to constrain the dynamical and physical properties of asteroidal debris

Using Video And Mobile Applications To Manage Distress Following Acute COPD Exacerbation With Respiratory Failure: A Case Report

Chronic lower respiratory diseases, mainly chronic obstructive pulmonary disorder (COPD), represent a significant economic burden to the healthcare system and are among the top three leading causes of death in the United States. An acute exacerbation of chronic pulmonary disorder (AECOPD) is a worsening of the respiratory symptoms associated with COPD including dyspnea, increased sputum production, cough, and airway obstruction. Frequent AECOPD influences psychological status and may worsen comorbid anxiety, depression, and increase distress levels. As a result, motivation, mood, and participation in therapy may also be affected. Most exacerbations may be treated effectively on an outpatient basis. A fraction of episodes escalate in severity, resulting in respiratory failure and intensive care or specialty hospital admission. The purpose of this case report is to describe the use of video and mobile applications to promote distress relief during the rehabilitation of a patient with respiratory failure secondary to AECOPD in an LTACH setting.https://dune.une.edu/pt_studcrposter/1153/thumbnail.jp

Public Perceptions of Wisconsin’s Pavements and Tradeoffs in Pavement Improvement

Findings are reported from Phase II of a three-phase pooled-fund project in Wisconsin, Iowa, and Minnesota to determine perceptions of drivers regarding pavement of rural two-lane highways. Among the survey topics were drivers\u27 trust in the state department of transportation (DOT), pavement improvement trade-offs, and pavement evaluation. Results of the Wisconsin portion of the survey data are the focus of this study. The survey questionnaire was based in part on Phase I focus groups conducted to gauge beliefs about pavements as well as the language describing ruts, tining, and other pavement characteristics. Phase II entailed a statewide telephone survey of at least 400 randomly selected drivers in each of the three states. Although the focus here is on Wisconsin results, survey responses across the three states were very consistent. Included in the findings discussed are perceptions of pavement and the state DOT and pavement improvement options relating to construction, travel time, and delays. Results disclose key public perceptions of priorities with regard to spending limited funds. Also discussed are statistically significant relationships providing additional insights into public perceptions and pavement improvement on rural two-lane highways

Nonlinear methods for solving the diffusion equation

"November, 1976."Also issued as a Ph. D. thesis written by the first author and supervised by the second author, MIT Dept. of Nuclear Engineering, 1977Includes bibliographical references (pages 112-116)This thesis is concerned with methods for the transient solution of the neutron diffusion equations in one or two energy groups. Initially, nonlinear methods for solving the static diffusion equations using the finite element method were investigated. By formulating a new eigenvalue equation, some improvement in the solution efficiency was obtained. However, the transient solution of the diffusion equation using the finite element method was considered to be overly expensive. An analytic method for solving the one-dimensional diffusion equation was then developed. Numerical examples confirmed that this method is exact in one dimension. The method was extended to two dimensions, and results compared employing two different approximations for the transverse leakage. The method based on a flat approximation to the leakage was found to be superior, and it was extended to time-dependent problems. Results of time-dependent test problems show the procedure to be accurate and efficient. Comparisons with conventional finite difference techniques (such as TWIGL or MEKIN) indicate that the scheme can be an order of magnitude more cost effective

Description of the computer code 2DTD

"November 1976."Includes bibliographical references (page 13

An African’s faith: Discourse and disclosure in selected works by Sindiwe Magona

The recent attention to decolonisation in academia and other facets of the sociopolitical landscape has encouraged many to re-examine their tenets of faith and their methods of incorporating personal expressions of spirituality into their decision-making processes. The significance of faith practices for South Africans as they manoeuvre the challenges of navigating the post-apartheid context has been acknowledged across a number of disciplines, including law, education and healthcare. Yet for decades, South African writers have seamlessly included religious thought and practice into their works, evidencing the subtle influence of faith and tradition in their prose. For many, their religious faith has been vital to their identity development and cultural expression, and synonymous with their liberation. This article examines these metaphoric realities in the cohesive interplay of African traditions and western Christianity in the oeuvre of recognised black South African writer Sindiwe Magona

DEVELOPMENT OF HIGH-STRENGTH NIOBIUM ALLOYS FOR ELEVATED-TEMPERATURE APPLICATIONS

A study to improve the elevated-temperature strength of niobium by solloving has resulted not only- in greatly improved strengths at 1200 and 1470 deg F but also in the development of improved fabrication techniques for these alloys. The most important step in the fabric:ition procedure of niobium and niobium-base allows is the initial breakdown of the cast structure. The cast structure of 1.84 wt. 4 chromium, 3.21 wt.% chromium. 4.33 wt. ' zirconium, and 20.5 wt.% titanium-4.28 wt. = chromium allovs and unalloyed niobium was broken known by- forging ingots (protected from oxidation by molybdenum ciins) at 2550 deg F and rolling at 800 deg F. After the initiai breakdown of the cast structure, the alloy-s were coid roiied to a total of 95 per cent reduction with no difficulty .A second fabrication technique was employed for a second set of alloys. Unalloyed niobium and 1.29 wt. % chromium, 2.74 wt. 3 zirconium, 4.5 wt.% molybdenum, and 10 wt. % titanium-3 wt.% chromium alloys were forged and rolled at 1000 deg F to break down the cast structure and then cold rolled to 0.030-in. sheet. the sheet obtained by this technique showed moderate edge cracking. Tensite tests on the coid-worked materiais at 1200 and 1470 deg F indicate that chromium and zirconium.ire both potent strengtheners of niobium: the 1.84 wt.% chromium alloy- hiid a 0.2 per cent offset yield strength of 107,000 psi at 1200 deg F and 69,000 psi at 1470 deg F, and the 4.33 wt. % zirconium alloy had a 0.2 per cent offset yield strength of 69,000 psi at 1470 deg F. Limited welding studies indicate that strong and reasonably ductlle welds can be produced both by arc and spot welding. (auth