1,319 research outputs found
Implementing a Process for Marketing Optional Safety Equipment
A technical paper at the 31st International System Safety Conference (ISSC) in 2013 discussed work that was being done at Sikorsky Aircraft Corporation to develop a standard process for marketing safety-enhancing features and equipment that are above and beyond airworthiness certification and regulatory requirements. Sikorsky has taken the stance that it’s worth the cost and weight associated with including certain items in our bid offerings because of their impact on safety. Although customers can choose to remove these items during contract negotiations, those decisions will initiate a dialogue to ensure that customers fully understand the consequences of doing so. Sikorsky’s Product Equipment List (PEL) process was implemented in August, 2014. This paper discusses changes that were incorporated during the PEL launch
Limit Laws in Transaction-Level Asset Price Models
We consider pure-jump transaction-level models for asset prices in continuous
time, driven by point processes. In a bivariate model that admits
cointegration, we allow for time deformations to account for such effects as
intraday seasonal patterns in volatility, and non-trading periods that may be
different for the two assets. We also allow for asymmetries (leverage effects).
We obtain the asymptotic distribution of the log-price process. We also obtain
the asymptotic distribution of the ordinary least-squares estimator of the
cointegrating parameter based on data sampled from an equally-spaced
discretization of calendar time, in the case of weak fractional cointegration.
For this same case, we obtain the asymptotic distribution for a tapered
estimator under moreComment: This version accepted by Econometric Theor
Combined ablation and radiation therapy of spinal metastases: A novel multimodality treatment approach
NRG/RTOG 0837: Randomized, phase II, double-blind, placebo-controlled trial of chemoradiation with or without cediranib in newly diagnosed glioblastoma
BACKGROUND: A randomized, phase II, placebo-controlled, and blinded clinical trial (NCT01062425) was conducted to determine the efficacy of cediranib, an oral pan-vascular endothelial growth factor receptor tyrosine kinase inhibitor, versus placebo in combination with radiation and temozolomide in newly diagnosed glioblastoma.
METHODS: Patients with newly diagnosed glioblastoma were randomly assigned 2:1 to receive (1) cediranib (20 mg) in combination with radiation and temozolomide; (2) placebo in combination with radiation and temozolomide. The primary endpoint was 6-month progression-free survival (PFS) based on blinded, independent radiographic assessment of postcontrast T1-weighted and noncontrast T2-weighted MRI brain scans and was tested using a 1-sided
RESULTS: One hundred and fifty-eight patients were randomized, out of which 9 were ineligible and 12 were not evaluable for the primary endpoint, leaving 137 eligible and evaluable. 6-month PFS was 46.6% in the cediranib arm versus 24.5% in the placebo arm (
CONCLUSIONS: This study met its primary endpoint of prolongation of 6-month PFS with cediranib in combination with radiation and temozolomide versus placebo in combination with radiation and temozolomide. There was no difference in overall survival between the 2 arms
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The electrical conductivity and degradation of silver azide
Digitisation of this thesis was sponsored by Arcadia Fund, a charitable fund of Lisbet Rausing and Peter Baldwin
Combining stereotactic body radiation therapy with immunotherapy: Current data and future directions
Stereotactic body radiation therapy (SBRT) offers excellent local control of early-stage non-small cell lung cancer (NSCLC), but there currently is a need for tolerable systemic therapy to address regional and distant disease progression. One potential option is immunotherapy, which in metastatic NSCLC has shown promise for sustained disease control in a subset of patients. There is also growing evidence for a clinical synergy between radiation and immunotherapy, with several ongoing trials studying the abscopal effect. This review summarizes the current data in the fast-changing field of immuno-radiation therapy, highlighting updates from recent clinical trials
Cardiac stereotactic ablative radiotherapy for control of refractory ventricular tachycardia: Initial UK multicentre experience
BACKGROUND: Options for patients with ventricular tachycardia (VT) refractory to antiarrhythmic drugs and/or catheter ablation remain limited. Stereotactic radiotherapy has been described as a novel treatment option.
METHODS: Seven patients with recurrent refractory VT, deemed high risk for either first time or redo invasive catheter ablation, were treated across three UK centres with non-invasive cardiac stereotactic ablative radiotherapy (SABR). Prior catheter ablation data and non-invasive mapping were combined with cross-sectional imaging to generate radiotherapy plans with aim to deliver a single 25 Gy treatment. Shared planning and treatment guidelines and prospective peer review were used.
RESULTS: Acute suppression of VT was seen in all seven patients. For five patients with at least 6 months follow-up, overall reduction in VT burden was 85%. No high-grade radiotherapy treatment-related side effects were documented. Three deaths (two early, one late) occurred due to heart failure.
CONCLUSIONS: Cardiac SABR showed reasonable VT suppression in a high-risk population where conventional treatment had failed
Hit The Deck / music by Vincent Youmans; words by Leo Robinson and Clifford Grey
Cover: description reads: A nautical musical comedy; Publisher: Harms Incorporated (New York)https://egrove.olemiss.edu/sharris_d/1087/thumbnail.jp
Pretreatment volume of MRI-determined white matter injury predicts neurocognitive decline after hippocampal avoidant whole-brain radiation therapy for brain metastases: Secondary analysis of NRG Oncology Radiation Therapy Oncology Group 0933
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