566 research outputs found
Community Emergency Management During the 2005 Ambae Eruption, Vanuatu, SW Pacific.
No abstract availabl
Investigation of New Tool to Unload Liquids from Stripper-Gas Wells
Abstract Liquid loading in low production gas wells is a common problem faced in many producing regions around the world. The techniques available to remove liquids from the wellbore impose significant capital and operational costs. This study investigates a new method for unloading and restoring continuous production of low rate (stripper) gas wells. The performance of a patented vortex flow modifier tool was examined using a 125-ft vertical flow loop of 2-inch diameter clear PVC. The vortex device was found to alter the basic flow structure in the pipe resulting in improved liquid flow. The tool was observed to reduce tubing pressure loss by up to 17 precent and lower the minimum gas velocity required to lift liquids up the tubing string
Models : tools for synthesis in international oceanographic research programs
Author Posting. © Oceanography Society, 2010. This article is posted here by permission of Oceanography Society for personal use, not for redistribution. The definitive version was published in Oceanography 23, no. 3 (2010): 126-139, doi: 10.5670/oceanog.2010.28Through its promotion of coordinated
international research programs, the
Intergovernmental Oceanographic
Commission (IOC) has facilitated
major progress on some of the most
challenging problems in oceanography.
Issues of global significance—such as
general ocean circulation, the carbon
cycle, the structure and dynamics
of ecosystems, and harmful algal
blooms—are so large in scope that
they require international collaboration
to be addressed systematically.
International collaborations are even
more important when these issues are
affected by anthropogenic processes—
such as climate change, CO2 enhancement,
ocean acidification, pollution,
and eutrophication—whose impacts
may differ greatly throughout the global
ocean. These problems require an entire
portfolio of research activities, including
global surveys, regional process studies,
time-series observations, laboratorybased
investigations, and satellite remote
sensing. Synthesis of this vast array of
results presents its own set of challenges
(Hofmann et al., 2010), and models
offer an explicit framework for integration
of the knowledge gained as well as
detailed investigation of the underlying
dynamics. Models help us to understand
what happened in the past, and to make
predictions of future changes—both
of which support the development of
sound policy and decision making. We
review examples of how models have
been used for this suite of purposes,
focusing on areas where IOC played a
key role in organizing and coordinating
the research activities.Support from the
National Science Foundation, National
Aeronautics and Space Administration,
National Oceanic and Atmospheric
Administration, and National Institute
of Environmental Health Sciences.
DS acknowledges CLISAP (Integrated
Climate System Analysis and Prediction)
at the KlimaCampus of the University
of Hamburg. PG acknowledges SCOR/
LOICZ Working Group 132
Effectiveness of cardiac resynchronization therapy by the frequency of revascularization procedures in ischemic cardiomyopathy patients
Background: It is not known whether the number of revascularizations modifies clinical outcomes in patients with ischemic cardiomyopathy (ICM) implanted with cardiac resynchronization therapy defibrillator (CRT-D) vs. an implantable cardioverter-defibrillator (ICD)-only.
Methods: In Multicenter Automatic Defibrillator Implantation Trial-Cardiac Resynchronization Therapy (MADIT-CRT), we evaluated the effect of CRT-D vs. ICD-only on heart failure (HF) or death, on ventricular tachycardia (VT), ventricular fibrillation (VF) or death, and on reverse remodeling in 592 ICM patients with left bundle branch block, by the number of pre-enrollment revascularizations (0, 1 or ≥ 2 revascularizations).
Results: There was a risk reduction of HF/death with CRT-D vs. ICD-only in all three sub-groups: ICM with no need for revascularization (HR 0.51 [0.26–1.02]; p = 0.055), ICM with 1 revascularization (HR 0.45 [0.30–0.70]; p < 0.001), and ICM with 2 or more revasÂcularizations (HR 0.37 [0.20–0.66]; p < 0.001). Similarly, there was a risk reduction of VT/ /VF/death with CRT-D vs. ICD-only in patients with no need for revascularization (HR 0.55 [0.31–0.99]; p = 0.044); with 1 revascularization (HR 0.77 [0.51–1.18]; p = 0.23); or with ≥ 2 revascularizations (HR 0.63 [0.34–1.17]; p = 0.14). There was a similar degree of left ventricular reverse remodeling in all three subgroups (p > 0.05 for LVESV, LVEDV, and LAV percent change at 1-year follow-up).
Conclusions: In ICM patients, CRT-D is associated with a reduction in HF or death and VT/VF or death — irrespective of the frequency of pre-enrollment revascularization procedures — and is accompanied by a similar degree of beneficial left ventricular reverse remodeling.
The Grizzly, December 2, 1983
Ursinus Mourns Loss of Bozorth • Student Dismissed • East and West: The Twain Meet • Nuclear Debate Reaches Ursinus • Students Needed for Telethon; Messiah Returns; Librarian Recognized • A Meeting of the Minds • Men\u27s Basketball Opens \u2783-\u2784 Season • Aquabears Stroke Well • UC Soccer Crowned ECAC Champs: Jubilation Reigns! • Women\u27s Hoops Take Drexel to the Limit • Bucketeers to Appear Sundayhttps://digitalcommons.ursinus.edu/grizzlynews/1109/thumbnail.jp
Combined histomorphometric and gene-expression profiling applied to toxicology
We have developed a unique methodology for the combined analysis of histomorphometric and gene-expression profiles amenable to intensive data mining and multisample comparison for a comprehensive approach to toxicology. This hybrid technology, termed extensible morphometric relational gene-expression analysis (EMeRGE), is applied in a toxicological study of time-varied vehicle- and carbon-tetrachloride (CCl(4))-treated rats, and demonstrates correlations between specific genes and tissue structures that can augment interpretation of biological observations and diagnosis
The Grizzly, October 7, 1983
Career Workshops Held • What\u27s in a Name • Fago Opens Lecture Series • Lantern Makes National Anthology • Campus Memo • Letters to the Editor • Red and Gold Days Inaugurated • Sorority Pledging Underway • Half-Price Student Rushes for Genty! • Keep it Clean • Renaissance Play at Ursinus Commemoration • ATO Incident at Penn • Politics Sells Papers • Yearbook Sale Begins Monday • Ursinus Soccer Romps Over Hopkins • Volleyball Scores Second Victory • Grizzlies Fall to Swarthmorehttps://digitalcommons.ursinus.edu/grizzlynews/1103/thumbnail.jp
Unipolar resistive switching in planar Pt/BiFeO3/Pt structure
This work was supported by the NASA EPSCoR Grant # NNX13AB22A. Financial support to various researchers from IFN-NSF grant # EPS 1002410 (RSK, DB, YS and BRW) is gratefully acknowledged. S. K. is thankful to UGC, India for a Raman fellowship under Indo-US 21st century knowledge initiatives (No:5-53/2013(I.C)).We report unipolar resistive switching suitable for nonvolatile memory applications in polycrystalline BiFeO3 thin films in planar electrode configuration with non-overlapping Set and Reset voltages, On/Off resistance ratio of similar to 10(4) and good data retention (verified for up to 3,000 s). We have also observed photovoltaic response in both high and low resistance states, where the photocurrent density was about three orders of magnitude higher in the low resistance state as compared to the high resistance state at an illumination power density of similar to 100 mW/cm(2). Resistive switching mechanisms in both resistance states of the planar device can be explained by using the conduction filament (thermo-chemical) model. (C) 2015 Author(s).Publisher PDFPeer reviewe
A Radio Pulsar/X-ray Binary Link
Radio pulsars with millisecond spin periods are thought to have been spun up
by transfer of matter and angular momentum from a low-mass companion star
during an X-ray-emitting phase. The spin periods of the neutron stars in
several such low-mass X-ray binary (LMXB) systems have been shown to be in the
millisecond regime, but no radio pulsations have been detected. Here we report
on detection and follow-up observations of a nearby radio millisecond pulsar
(MSP) in a circular binary orbit with an optically identified companion star.
Optical observations indicate that an accretion disk was present in this system
within the last decade. Our optical data show no evidence that one exists
today, suggesting that the radio MSP has turned on after a recent LMXB phase.Comment: published in Scienc
The effects of creatine supplementation combined with resistance training on regional measures of muscle hypertrophy: a systematic review with meta-analysis.
The purpose of this paper was to carry out a systematic review with meta-analysis of randomized controlled trials that examined the combined effects of resistance training (RT) and creatine supplementation on regional changes in muscle mass with direct imaging measures of hypertrophy. Moreover, we performed regression analyses to determine the potential influence of covariates. We included trials of at least 6 weeks in duration that examined the combined effects of creatine supplementation and RT on site-specific direct measures of hypertrophy (magnetic resonance imaging [MRI], computed tomography [CT] or ultrasound) in healthy adults. A total of 44 outcomes were analyzed across 10 studies that met inclusion criteria. Univariate analysis of all standardized outcomes showed a pooled mean estimate of 0.11 (95% Credible Interval [CrI]: -0.02 to 0.25) providing evidence of a very small effect favoring creatine supplementation when combined with RT, compared to RT and placebo. Multivariate analyses found similar small benefits for the combination of creatine supplementation and RT on changes in upper and lower body muscle thickness (0.10-0.16 cm). Analyses of moderating effects indicated a small superior benefit for creatine supplementation on younger compared to older adults (0.17 [95% CrI: -0.09 to 0.45]). In conclusion, results suggest that creatine supplementation combined with RT promotes a small increase in direct measures of skeletal muscle hypertrophy in both the upper and lower body
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