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Search Results: 1 - 10 of 235041 matches for " Eric R. Pardyjak "
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Structure of Turbulence in Katabatic Flows below and above the Wind-Speed Maximum
Andrey A. Grachev,Laura S. Leo,Silvana Di Sabatino,Harindra J. S. Fernando,Eric R. Pardyjak,Christopher W. Fairall
Physics , 2015, DOI: 10.1007/s10546-015-0034-8
Abstract: Measurements of small-scale turbulence made over the complex-terrain atmospheric boundary layer during the MATERHORN Program are used to describe the structure of turbulence in katabatic flows. Turbulent and mean meteorological data were continuously measured at multiple levels at four towers deployed along the East lower slope (2-4 deg) of Granite Mountain. The multi-level observations made during a 30-day long MATERHORN-Fall field campaign in September-October 2012 allowed studying of temporal and spatial structure of katabatic flows in detail, and herein we report turbulence and their variations in katabatic winds. Observed vertical profiles show steep gradients near the surface, but in the layer above the slope jet the vertical variability is smaller. It is found that the vertical (normal to the slope) momentum flux and horizontal (along the slope) heat flux in a slope-following coordinate system change their sign below and above the wind maximum of a katabatic flow. The vertical momentum flux is directed downward (upward) whereas the horizontal heat flux is downslope (upslope) below (above) the wind maximum. Our study therefore suggests that the position of the jet-speed maximum can be obtained by linear interpolation between positive and negative values of the momentum flux (or the horizontal heat flux) to derive the height where flux becomes zero. It is shown that the standard deviations of all wind speed components (therefore the turbulent kinetic energy) and the dissipation rate of turbulent kinetic energy have a local minimum, whereas the standard deviation of air temperature has an absolute maximum at the height of wind-speed maximum. We report several cases where the vertical and horizontal heat fluxes are compensated. Turbulence above the wind-speed maximum is decoupled from the surface, and follows the classical local z-less predictions for stably stratified boundary layer.
An Unusual Case of Urinary Incontinence  [PDF]
Eric R. Anderson, Darius J. Unwala
Open Journal of Urology (OJU) , 2011, DOI: 10.4236/oju.2011.11001
Abstract: Urinary incontinence and hematuria are frequent complaints evaluated by urologists often with readily identifiable etiologies. Occasionally, an unlikely source is found. We present an unusual case of urinary incontinence and hematuria in an elderly female. Evaluation revealed that the complaints were due to a large cyst emanating from her right hip which was the result of a previous right hip arthroplasty in 1970 with three subsequent revisions. Her symptoms resolved spontaneously and the cyst has remained unchanged.
Assessing insulin effectiveness at the end of the day: Once-daily versus twice-daily insulin glargine injection  [PDF]
Mark R. Burge, Eric R. Schroeder, Stephen Mitchell
Journal of Diabetes Mellitus (JDM) , 2012, DOI: 10.4236/jdm.2012.22032
Abstract: Objective: Evidence supporting the twice-daily administration of insulin glargine as an approach to address its waning effectiveness at the end of a 24 hour period is sparse. We hypothesized that insulin concentrations determined during the last four hours of a 24 hour period would be greater when identical doses of insulin glargine were administered twice-daily as compared to once-daily among type 1 diabetes patients. Research Methods: Ten subjects with insulin deficient type 1 diabetes were admitted for two 38-hour studies at least one week apart. Patients received full-dose insulin glargine once daily at 0800 and half-dose insulin glargine twice-daily at 0800 and 2000 for at least one week in random order prior to overnight studies. Overnight glucose was stabilized with intravenous insulin on the evening prior to study, and subjects fasted and did not receive short acting insulin during the study period. Insulin concentrations were assessed every 30 minutes with an ultrasensitive assay between study hours 20 and 24. Results: Insulin concentrations for the final four hours of study period did not differ between once-daily and twice-daily insulin glargine administration (p = 0.38). Home glucose testing results and overnight plasma glucose concentrations did not differ between study conditions. Conclusions: These results demonstrate that insulin concentrations are equivalent during the last four hours of a 24-hour period when insulin glargine is administered once- or twice-daily. These findings do not support a role for twice-daily insulin glargine in the management of patients with type 1 diabetes.
The value of econometrics to economists in business and government: a study of the state of the discipline
Eric R. Sowey
Advances in Decision Sciences , 2002, DOI: 10.1155/s117391260200007x
Abstract: This paper is the first ever in-depth study of the econometric practice of quantitative economists outside academia. It goes further, to examine empirically the often-heard proposition that academic and nonacademic economists nowadays seem to analyse the same applied quantitative problems in markedly separate ways. Nine indicators of separation between the approaches of ‘town’ and ‘gown’ economists are developed. The study rests on detailed interviews with 50 nonacademic economists drawn widely from a single area of professional activity: the Australian housing sector. These economists' use of econometric methods, and their views on the value of these methods, are documented and compared with the academic approach to applied econometric work, as reported in the scholarly literature. The evidence on the nine indicators supports the existence of a state of separation. The paper points to some undesirable consequences of separation and concludes with practical ideas on what should be done about it. There are lessons in the findings of this study for the future of other quantitative disciplines that are widely practised in government, business and industry.
Terrorist bombings in Madrid
Eric R Frykberg
Critical Care , 2004, DOI: 10.1186/cc2997
Abstract: The authors confirmed the many consistent patterns to be expected following terrorist bombings, which virtually every other published series has documented [2,3]. The great majority of immediate survivors (1789/1885 [95%]) were not critically injured. As the authors state, this is best explained by the selection bias caused by the immediate death of most of those with critical injuries. Although it appears quite favorable that 14 of these 1885 immediate survivors (0.74%) subsequently died, it is important to recognize that this is deceptive because most casualties were not at all at risk for death. The death rate was correctly expressed in this report as a percentage of only the critically injured casualties who were truly at risk for death, and among whom all deaths occurred, resulting in a much heftier 'critical mortality' rate of 17% (14/82). This is a more accurate reflection of the quality of medical care given in such a mass casualty setting, and is a more accurate standard for comparison with other similar bombings. This critical mortality rate falls well within the range of all other terrorist bombing disasters, and lends itself to quality improvement analysis. The authors should be commended for applying the established objective measures of injury severity (Injury Severity Score, Acute Physiology and Chronic Health Evaluation II) to their patient population to allow this determination. I do agree that the two early emergency room deaths should be included in this figure because these patients were exposed to medical care.The injury patterns in this event were also typical of bombing disasters. Head, chest, abdominal, traumatic amputation and blast lung injuries predominated among the critically injured survivors, being the most common contributors to death; musculoskeletal and soft tissue wounds predominated among those who were not critically injured. Eardrum perforations and eye injuries were quite common but did not cause life-threatening problems.Over-
The molecular biology of memory: cAMP, PKA, CRE, CREB-1, CREB-2, and CPEB
Eric R Kandel
Molecular Brain , 2012, DOI: 10.1186/1756-6606-5-14
Cultura, ideologia, poder e o futuro da antropologia
Wolf Eric R.
Mana , 1998,
The Ambiguity of Reduction
Eric R. Scerri
Hyle : International Journal for Philosophy of Chemistry , 2007,
Abstract: I claim that the question of whether chemistry is reduced to quantum mechanics is more ambiguous and multi-faceted than generally supposed. For example, chemistry appears to be both reduced and not reduced at the same time depending on the perspective that one adopts. Similarly, I argue that some conceptual issues in quantum mechanics are ambiguous and can only be laid to rest by embracing paradox and ambiguity rather than regarding them as obstacles to be overcome. Recent work in the reduction of chemistry is also reviewed, including discussions of the ontological reduction of chemistry and the question of the emergence of chemistry from physics.
Some Aspects of the Metaphysics of Chemistry and the Nature of the Elements
Eric R. Scerri
Hyle : International Journal for Philosophy of Chemistry , 2005,
Abstract: There is now a considerable body of published work on the epistemology of modern chemistry, especially with regard to the nature of quantum chemistry. In addition, the question of the metaphysical underpinnings of chemistry has received a good deal of attention. The present article concentrates on metaphysical considerations including the question of whether elements and groups of elements are natural kinds. It is also argued that an appeal to the metaphysical nature of elements can help clarify the re-emerging controversies among chemists regarding the placement of the elements hydrogen and helium in the periodic system and the question of whether there exists a best form of the periodic table.
Impulsive Periodic Boundary Value Problems for Dynamic Equations on Time Scale
Eric R. Kaufmann
Advances in Difference Equations , 2009, DOI: 10.1155/2009/603271
Abstract: Let be a periodic time scale with period p such that 0,ti,T=mp∈ , i=1,2,…,n, m∈ , and 0
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