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Search Results: 1 - 10 of 6493 matches for " Brad Brown "
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Influence of deficit irrigation on nutrient indices in wine grape (Vitis vinifera L.)  [PDF]
Krista Shellie, Brad Brown
Agricultural Sciences (AS) , 2012, DOI: 10.4236/as.2012.32031
Abstract: Deficit irrigation is widely used in wine grape production (Vitis vinifera L.) to meet wine quality goals yet its influence on tissue nutrient indices has not been well studied. The objective of this research was to determine whether response to water deficit compromised the prescriptive usefulness of tissue nutrient analyses. Tissue macro and micronutrient composition at bloom and veraison were evaluated over multiple seasons in nine wine grape cultivars grown under well-watered or deficit-irrigated conditions. Deficit-irrigated vines sampled at veraison had 2 to 12-fold higher petiole nitrate-nitrogen concentration, 6% lower blade nitrogen concentration and 13% lower blade copper concentration compared to well-watered vines. Water deficit influenced blade potassium concentration at veraison differently according to cultivar and was lower (cv. Malbec, Petite syrah, Viognier, Lemberger and Sangiovese), higher (cv. Merlot, Cabernet franc and Cabernet Sauvignon) or similar (cv. Grenache) to well-watered vines. Results from this study indicate that nutrient analysis of petiole or blade tissue sampled at veraison has limited diagnostic and prescriptive usefulness when vines are grown under a water deficit.
The MARTE VNIR Imaging Spectrometer Experiment: Design and Analysis
Adrian J. Brown,Brad Sutter,Stephen Dunagan
Physics , 2014, DOI: 10.1089/ast.2007.0142
Abstract: We report on the design, operation, and data analysis methods employed on the VNIR imaging spectrometer instrument that was part of the Mars Astrobiology Research and Technology Experiment (MARTE). The imaging spectrometer is a hyperspectral scanning pushbroom device sensitive to VNIR wavelengths from 400-1000 nm. During the MARTE project, the spectrometer was deployed to the Rio Tinto region of Spain. We analyzed subsets of 3 cores from Rio Tinto using a new band modeling technique. We found most of the MARTE drill cores to contain predominantly goethite, though spatially coherent areas of hematite were identified in Core 23. We also distinguished non Fe-bearing minerals that were subsequently analyzed by X-ray diffraction (XRD) and found to be primarily muscovite. We present drill core maps that include spectra of goethite, hematite, and non Fe-bearing minerals.
Does Anesthesiologist-Directed Sedation Afford Superior Deep Cannulation Rates and Procedural Outcomes for ERCP in the Community Setting?  [PDF]
Brad Bowyer, Kathy Geissler, Robert Barclay, Sumeet Tewani, James Frakes, Nicholas Brown, Matthew Houlihan, Kunal Patel, Andrew Spiel
Open Journal of Gastroenterology (OJGas) , 2016, DOI: 10.4236/ojgas.2016.62007
Abstract: Aim: To compare outcomes by sedation class in community patients undergoing index endoscopic retrograde cholangiopancreatography (ERCP). Methods: Nineteen hundred sixteen consecutive patients underwent ERCP from May 2005 to May 2011. Eight hundred thirty seven patients were excluded due to prior papillary intervention or attempted ERCP. A total of 1079 patients were included. The 981 patients who underwent gastroenterologist directed sedation (GDS) served as the control population, while the 98 patients who received anesthesiologist directed sedation (ADS) served as the case population. Medical records were analyzed for patient demographics, procedure indication, adverse events, case complexity, procedural failure and sedation failure. Case complexity was defined by the grading system proposed by the working party of the ASGE Quality Committee. Sedation failure was defined by agitation or airway compromise prompting termination of the ERCP. Reasons for procedural failure included surgically altered anatomy, luminal obstruction, and technical failure. Study endpoint was defined as successful deep cannulation of the intended target duct. Results: Demographic distribution did not differ between the GDS and the ADS groups. Cannulation success rates were similar between the two groups, with 89.85% in the GDS group, and 89.58% in the ADS group (P = 0.864). There were no statistical differences between sedation groups in procedural or respiratory adverse events. Technical failure was the predominant basis for deep cannulation failure in both groups. Agitation and airway compromise accounted for deep cannulation failure similarly in both groups. The need for reversal agents was low but similar in both groups. There was no statistical advantage in deep cannulation success rate by complexity grade in either sedation class. Conclusion: Excellent procedural outcomes and low adverse event rates were achieved using GDS, a more accessible and cost-effective method in a community-based setting.
Starspots on Young Solar-Type Stars
Carolyn Brown,Brad Carter,Stephen Marsden,Ian Waite
Physics , 2013, DOI: 10.1017/S1743921314001938
Abstract: Doppler Imaging of starspots on young solar analogues is a way to investigate the early history of solar magnetic activity by proxy. Doppler images of young G-dwarfs have yielded the presence of large polar spots, extending to moderate latitudes, along with measurements of the surface differential rotation. The differential rotation measurement for one star (RX J0850.1- 7554) suggests it is possibly the first example of a young G-type dwarf whose surface rotates as almost a solid body, in marked contrast to the differential rotation of other rapidly rotating young G-dwarfs and the present-day Sun. Overall, our Doppler imaging results show that the young Sun possessed a fundamentally different dynamo to today.
Consciousness & Time: A Time-Based Model of the Evolution of Consciousness  [PDF]
Brad Bowins
Journal of Behavioral and Brain Science (JBBS) , 2017, DOI: 10.4236/jbbs.2017.71002
Abstract: A novel theoretical model is presented maintaining that consciousness evolved on the basis of time distinctions. Various models of time pertain to the existence of future, present and past. It is proposed that the future represents potentialities, the present the actualization of certain potentialities, and the past a record of actualized potentialities. Actualization of potentialities derives from micro quantum wave function collapses with specific constellations corresponding to macro level form. Consciousness provides for an awareness of potentialities being actualized in the present, the time frame of consciousness closely aligning with the time frame of potentialities being actualized in the moment. Evolution of such awareness is highly probable, given the ensuing motivation enabling behavior to be altered in the moment to minimize the actualization of maladaptive potentialities, and maximize the actualization of adaptive potentialities. The model also provides a logical proof for the occurrence of time distinctions.
High Resolution Spectroscopy and Spectropolarimetry of some late F-/early G-type sun-like stars as targets for Zeeman Doppler imaging
Ian Waite,Stephen Marsden,Brad Carter,Evelyne Alecian,Carolyn Brown,Donna Burton,Rhodes Hart
Physics , 2011, DOI: 10.1071/AS11025
Abstract: High resolution spectroscopy and spectropolarimetry have been undertaken at the Anglo-Australian Telescope in order to identify suitable targets for magnetic studies of young sun-like stars, for the proxy study of early solar evolution. This study involved the investigation of some variable late F-/early G-type sun-like stars originally identified by the Hipparcos mission. Of the 38 stars observed for this study, HIP 31021, HIP 64732, HIP 73780 were found to be spectroscopic binary stars while HIP 19072, HIP 67651 and HIP 75636 are also likely to be binaries while HIP 33111 could even be a triple system. Magnetic fields were detected on a number of the survey stars: HIP 21632, HIP 43720, HIP 48770, HIP 62517, HIP 71933, HIP 77144, HIP 89829, HIP 90899 and HIP 105388, making these stars good candidates for follow-up Zeeman Doppler imaging studies.
Novel Insights into Disseminated Candidiasis: Pathogenesis Research and Clinical Experience Converge
Brad Spellberg
PLOS Pathogens , 2008, DOI: 10.1371/journal.ppat.0040038
Abstract:
The scientific foundation for tobacco harm reduction, 2006-2011
Brad Rodu
Harm Reduction Journal , 2011, DOI: 10.1186/1477-7517-8-19
Abstract: In 2006 the American Council on Science and Health (ACSH) became the first American scientific organization to formally endorse tobacco harm reduction (THR), which involves the substitution of far safer sources of nicotine by those smokers who are unable or unwilling to achieve nicotine/tobacco abstinence. ACSH's position was based on a comprehensive review of the existing scientific and medical literature, which documented that (a) epidemiologic studies showed that smokeless tobacco (ST) use was at least 98% safer than smoking, (b) use of ST among men in Sweden was a major factor in very low prevalence of smoking, (c) ST use is not a gateway to smoking, (d) American smokers are misinformed about the scientific and medical basis for THR [1].Among developed countries the U.S. currently provides the best access to a wide variety of smoke-free products, including traditional smokeless tobacco, Swedish snus, dissolvable tobacco (sticks, strips, orbs and pellets), e-cigarettes, and pharmaceutical nicotine (gum, lozenges, patches, nasal spray). Many other countries prohibit almost all of them, which sadly enhances the continued dominance of cigarettes. Development and marketing of alternative smoke-free nicotine delivery systems will be accelerated by recent acquisitions by major tobacco manufacturers. In 2009 Reynolds American Inc. purchased Niconovum, a Swedish company developing novel nicotine products. In 2011 British American Tobacco established Nicoventures Limited, which will develop and commercialize innovative nicotine products, and Philip Morris International purchased global patent rights to a nicotine-containing aerosol developed by scientists at Duke University.Over the past five years there has been exponential expansion of interest in THR from medical and public health professionals, with a concomitant increase in the number of published studies. The purpose of this manuscript is to review and analyze influential contributions to the scientific and medical
KIERKEGAARD ANTE LOS PROBLEMAS DE LA PURA IRONíA
Frazier,Brad;
Praxis Filosófica , 2007,
Abstract: s?ren kierkegaard's thesis, the concept of irony, contains an interesting critique of pure irony. kierkegaard's critique turns on two main claims: a) pure irony is an incoherent and thus, unrealizable stance; b) the pursuit of pure irony is morally enervating, psychologically destructive, and culminates in bondage to moods. in this essay, first i attempt to clarify kierkegaard's understanding of pure irony as "infinite absolute negativity". then i set forth his multilayered critique of pure irony. finally, i consider briefly a distinctly theological component in kierkegaard's critique. i argue that this feature of kierkegaard's account can and should be distinguished from the broadly ethical critique of pure irony that i sketch in the second section, even if these components of kierkegaard's position are found together as a unified whole in the concept of irony. my overall goal in this essay is to reveal the subtlety and plausibility of kierkegaard's critique of pure irony. i also attempt to disclose the richness of the hegelian account of ethical life to which kierkegaard recurs in his thesis.
Who Works Where:
Brad Epps
Hispanic Issues On Line , 2006,
Abstract:
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