Search results for " head"
showing 10 items of 503 documents
Double-Blind Study on the Effects of Steroids on Severe Closed Head Injury
1976
The results of a double-blind study on the effects of a low dose and a high dose of dexamethasone on severe closed head injury are presented. The steroid, particularly in high dose, reduced mortality, improved the neurologic course and the final outcome. Timing of steroid administration is of great importance.
Prophylaxis of hemicrania continua: two new cases effectively treated with topiramate.
2007
Hemicrania continua (HC) is an uncommon and under-recognized primary headache disorder characterized by a strictly unilateral continuous headache of moderate intensity with possible exacerbations and associated with ipsilateral autonomic features. HC has generally a prompt and enduring response to indomethacin although 25% to 50% of treated patients develop gastrointestinal side effects. These cases pose a difficult management challenge as no other drug is consistently effective in HC. Recently 2 HC patients responsive to topiramate treatment have been reported. Here we describe 2 more patients effectively treated with topiramate. Neither reported any side effects and one had persisting res…
Sapotrophical development of fusarium graminearum : respective role of different natural habitats of the fungus in the wheat infectious process in Bu…
2012
Fusarium Head Blight (FHB), mainly caused by the fungal species Fusarium graminearum, is one of the most important disease altering wheat crops in Burgundy. Moreover the plant-pathogen interaction leads to the production of mycotoxins potentially toxic for humans and animals.The only alternative to date to prevent the development of the disease is to control the saprotrophic development of F. graminearum in its natural habitat, i.e. weeds, soil and crops residues. Due to the trend of reduced tillage, special attention should be paid to the role of crop residues in the survival and development of F. graminearum.Two approaches were chosen to better understand the saprotrophic development of F…
Histopathological and immunohistochemical aspects of bone tissue in aseptic necrosis of the femoral head
2021
Femoral head osteonecrosis, also known as avascular necrosis, is a disease with a multifactorial etiology, characterized by a profound change of bone architecture, which leads to the diminishing of bone resistance and femoral head collapse. The main causes that lead to femoral head necrosis are represented by the decrease of local blood perfusion and increase of intraosseous pressure, because of an excessive development of adipose tissue in the areolas of the trabecular bone tissue in the femoral head. The histopathological and immunohistochemical (IHC) study performed by us showed that most of bone trabeculae were damaged by necrotic-involutive processes, their sizes being reduced, both re…
Are paediatric headaches in the emergency department increasing? An Italian experience
2020
The aim of this study was to assess admissions, for headache, to the emergency department (ED) of the Di Cristina Children’s Hospital in Palermo over a decade. The total number of ED admissions for headache was retrospectively analysed considering two 24-month periods: 2009-2010 and 2017-2018. Total admissions to the ED decreased from 55,613 to 50,096 (-10%) between the two periods considered, while the number of admissions for headache increased by 63.56% (p < 0.0001). There was also a significant increase in the number of multiple ED admissions by single children (9.5% versus 17.98% of the patients accessing the ED for headache). This significant increase in admissions for paediatric h…
Coupled hydraulic and electronic regulation of cross-flow turbines in hydraulic plants
2017
The potential benefit of coupling hydraulic and electronic regulation to maximize the energy production of a cross-flow turbine in hydraulic plants is analyzed and computed with reference to a specific case. Design criteria of the cross-flow turbine inside hydraulic plants are first summarized, along with the use of hydraulic regulation in the case of constant water head and variable discharge. Optimal turbine impeller rotational speed is derived, and traditional as well as innovative systems for electrical regulation are presented. A case study is analyzed to evaluate the potential energy production according to the expected monthly mean flow distribution and two possible choices: CFT1 wit…
Coupled Hydraulic and Electronic Regulation for Banki Turbines
2016
Abstract The potential benefit of coupling hydraulic and electronic regulation to maximize the energy production of a Bank turbine in hydraulic plants is analyzed and computed with reference to a specific case. Design criteria of the Banki turbine inside hydraulic plants are first summarized, along with the use of hydraulic regulation in the case of constant water head and variable discharge at the end of aqueducts feeding water distribution systems. Optimal turbine impeller rotational speed is derived and traditional, as well as innovative systems for electricity production according to controlled rotational speed of the generator are presented. The study case at the purification plant nam…
New Computational Fluid Dynamic Procedure to Estimate Friction and Local Losses in Coextruded Drip Laterals
2007
The design of trickle irrigation systems is crucial to optimize profitability and to warrant high values for the emission uniformity (EU) coefficient. EU depends on variation of the pressure head due to head losses along the lines and elevation changes, as well as the water temperature, and other parameters related to the emitters (manufacturer's coefficient of variation, number of emitters per plants, emitter spacing). Trickle irrigation plants are usually designed using small diameter plastic pipes (polyethylene or polyvinyl chloride). The design problem, therefore, needs to consider head losses along the lines as well as emitter discharge variations due to the manufacturer's variability.…
FE Calculation Methodology for the Thermodynamic Fatigue Analysis of an Engine Component
2006
Thermo mechanical fatigue problem is treated to define an analysis methodology permitting the strength evaluation by reliability viewpoint. The main difficulty is the lack of both theoretical and experimental information; consequently the problem is treated verifying continually the validity and the limits of the developing solution method. The main task of the activity described in this paper was the development of a numerical methodology, based on FE analyses, for the evaluation of the structural behavior of engine components subjected to thermo mechanical fatigue phenomena. The chosen application was the exhaust manifold of an IC engine; FE analyses were executed following the standard m…
Methodological frontier in operational analysis for roundabouts: a review
2016
Several studies and researches have shown that modern roundabouts are safe and effective as engineering countermeasures for traffic calming, and they are now widely used worldwide. The increasing use of roundabouts and, more recently, turbo and flower roundabouts, has induced a great variety of experiences in the field of intersection design, traffic safety, and capacity modeling. As for unsignalized intersections, which represent the starting point to extend knowledge about the operational analysis to roundabouts, the general situation in capacity estimation is still characterized by the discussion between gap acceptance models and empirical regression models. However, capacity modeling mu…