Evaluation of critical mass for open-cycle, gas-core rocket reactors

Evaluation of critical mass for open cycle, gas core rocket reactor

Tail States in a Superconductor with Magnetic Impurities

A field theoretic approach is developed to investigate the profile and spectrum of sub-gap states in a superconductor subject to a weak magnetic impurity potential. Such states are found to be associated with inhomogeneous supersymmetry broken instanton configurations of the action.Comment: 4 pages, 2 eps figure

Moduli and periods of simply connected Enriques surfaces

We describe a period map for those simply connected Enriques surfaces in characteristic 2 whose canonical double cover is K3. The moduli stack for these surfaces has a Deligne-Mumford quotient that is an open substack of a $\mathbb P^1$-bundle over the period space. We also give some general results relating local and global moduli for algebraic varieties and describe the difference in their dimensions in terms of the failure of the automorphism group scheme to be reduced

Master of Science

thesisSideline concussion assessments can prove difficult in situations where athletes claim to be asymptomatic and do not present with obvious cognitive deficit. More thorough neurocognitive assessments, such as Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT), can be difficult to administer on the sideline and are not always conclusive. The Vestibular/Ocular Motor Screen (VOMS) is designed to assess the vestibular and ocular symptomology of an individual suspected of suffering a concussion and has shown promising preliminary findings. This study sought to determine if the VOMS would correlate with current concussion assessment methods in acute settings. Participants were recruited from local high schools and included football athletes who sustained a suspected concussion. Athletes suspected of a concussion were administered a subsection of the VOMS before other concussion assessment methods. Results were compared to the Standardized Concussion Assessment Tool (SCAT 3) and ImPACT tests to determine the ability of the VOMS to assess the presence of concussion in acute situations. It was hypothesized the VOMS would correlate with concussion evaluations and lend more support to the diagnosis. Receiver Operating Curve (ROC) analysis and Phi correlations were conducted. The study concluded with a sample of 11 athletes evaluated for suspected concussion with five concussions diagnosed through assessments other than the VOMS. Our study findings revealed that relationship and diagnostic ability were evident regarding specific symptoms within individual tests, which comprises the VOMS. However, the subset of the VOMS utilized for this test did not prove to be a viable test metric to determine the presence of an acute concussion. Interestingly, significant relationships and diagnostic capability were identified within this tested subset of the VOMS, specifically regarding concussion suspicion when fogginess and dizziness are present. Further research is warranted to determine if these findings can be used in a diagnostic capacity, though at minimum, our study findings provide a basis for increased clinical suspicion of concussion when these symptoms are present

A brief guide to the selection of quality of life instrument

There are numerous quality of life (QOL) scales. Because QOL experts are often partial to their own scales, researchers need to be able to select scales for themselves. Scales best suited for longitudinal purposes (clinical trials and audit) have different properties to those suited for cross-sectional studies (population and correlational studies and clinical use). The reason and logic of these differences is explained. For longitudinal use, researchers need to consider the relationship between item set, population and treatment; scales can be short, floor and ceiling effects must be avoided, and there should be extended response options. For cross-sectional use scales should have a wide range of items, should be longer, and there are no adverse floor and ceiling effects, and response options can be simpler to allow a larger set of items

Cavity Reactor Engineering Mockup Critical Experiment

Critical mass of uranium 235 for stainless steel lined cavities in nuclear research and test reactors with heavy water reflecto

Observations of deep coral and sponge assemblages in Olympic Coast National Marine Sanctuary, Washington. Cruise Report: NOAA Ship McArthur II Cruise AR06-07/07

From May 22 to June 4, 2006, NOAA scientists led a research cruise using the ROPOS Remotely Operated Vehicle (ROV) to conduct a series of dives at targeted sites in the Olympic Coast National Marine Sanctuary (OCNMS) with the goal of documenting deep coral and sponge communities. Dive sites were selected from areas for which OCNMS had side scan sonar data indicating the presence of hard or complex substrate. The team completed 11 dives in sanctuary waters ranging from six to 52 hours in length, at depths ranging from 100 to 650 meters. Transect surveys were completed at 15 pre-selected sites, with additional observations made at five other sites. The survey locations included sites both inside and outside the Essential Fish Habitat (EFH) Conservation Area, known as Olympic 2, established by the Pacific Fishery Management Council, enacted on June 12, 2006. Bottom trawling is prohibited in the Olympic 2 Conservation Area for nontribal fishermen. The Conservation Area covers 159.4 square nautical miles or about 15 percent of the sanctuary. Several species of corals and sponges were documented at 14 of the 15 sites surveyed, at sites both inside and outside the Conservation Area, including numerous gorgonians and the stony corals Lophelia pertusa and Desmophyllum dianthus, as well as small patches of the reef building sponge Farrea occa. The team also documented Lophelia sp. and Desmophyllum sp. coral rubble, dead gorgonians, lost fishing gear, and other anthropogenic debris, supporting concerns over potential risks of environmental disturbances to coral health. (PDF contains 60 pages.

Atmospheric effects on the underground muon intensity

It has previously been reported that the barometric pressure coefficient observed for muons at Poatina (vertical absorber depth 357 hg/sq cm) appears to be appreciably higher than would be expected from atmospheric absorption alone. There is a possibility that the effect is due to an upper atmospheric temperature effect arising from an inverse correlation of surface pressure with stratospheric temperature. A new proportional telescope is discussed which has been operating at Poatina since about the beginning of 83 and which has a long term stability suitable for studying variations of atmospheric origin

A case report of vanishing bile duct syndrome after exposure to pexidartinib (PLX3397) and paclitaxel.

Pexidartinib (PLX3397) is a small molecule tyrosine kinase and colony-stimulating factor-1 inhibitor with FDA breakthrough therapy designation for tenosynovial giant-cell tumor, and currently under study in several other tumor types, including breast cancer, non-Hodgkin's lymphoma, and glioblastoma. Here, we report a case of severe drug-induced liver injury requiring liver transplantation due to vanishing bile duct syndrome (VBDS) after exposure to pexidartinib in the I-SPY 2 Trial, a phase 2 multicenter randomized neoadjuvant chemotherapy trial in patients with Stage II-III breast cancer. We also review the current literature on this rare, idiosyncratic, and potentially life-threatening entity