263 research outputs found
Reconstruction of the gravitational wave signal h(t) during the Virgo science runs and independent validation with a photon calibrator
No full text
In-vacuum Faraday isolation remote tuning
No full textIn-vacuum Faraday isolators (FIs) are used in gravitational wave interferometers to prevent the disturbance caused by light reflected back to the input port from the interferometer itself. The efficiency of the optical isolation is becoming more critical with the increase of laser input power. An in-vacuum FI, used in a gravitational wave experiment (Virgo), has a 20mm clear aperture and is illuminated by an almost 20W incoming beam, having a diameter of about 5mm. When going in vacuum at {10}^-6mbar, a degradation of the isolation exceeding 10dB was observed. A remotely controlled system using a motorized λ/2 waveplate inserted between the first polarizer and the Faraday rotator has proven its capability to restore the optical isolation to a value close to the one set up in air
Towards an Integrated Coastal Zone Management in Campania Region (Italy): A Multidisciplinary Approach to the Analysis of Coastal Fishery Activities and their Socio-Economic Management
No full textAbstractThe paper presents same of the main outcomes of a study concerning the application of the Integrated Coastal Zone Management (ICZM) to Campania region in Italy. The study was focused on the analysis of main uses and activities related to fishery such as the definition of thematic maps describing zones in which fishing activities are prohibited or restricted, areas of distribution of fishing effort, socio economic sustainability of local artisanal fishery, the relevance of fishing tourism and recreational fisheries, an analysis of local fish market. Data provided by official source as the Fishery Data collection, vessel traffic monitoring systems, logbook and legislative sources were successively verified by a field analysis through direct interviews to stakeholders
Gallbladder function and gastric liquid emptying in achalasia.
No full textBecause of evidence that the abnormalities in achalasia are not restricted to the distal esophagus, we investigated gallbladder function by cholescintigraphy in the steady state and in response to CCK and the scintigraphic gastric emptying of a liquid caloric meal in 10 individuals with achalasia and 10 normal controls. No abnormalities were found during the filling phase of the gallbladder but seven of the 10 patients showed a 50% reduction in the ejection fraction (39.4% +/- 30.4 vs 80.3 +/- 8.3 of controls, mean +/- SD, P = 0.007) and a slower than normal ejection phase (9.1%/min +/- 6.6 vs 18.1 +/- 4.5, P = 0.02. In eight of the 10 patients, gastric liquid emptying was accelerated with a T1/2 of 41.5 min +/- 15.4 vs 74.7 min +/- 11.5 in the controls (P = 0.007). It is concluded that in some achalasia patients extraesophageal functional abnormalities of the gastrointestinal tract may be found. Whether these findings are promoted by degenerative changes of extraesophageal nerve fibers as well as their clinical significance require further investigations
Are the lower oesophageal sphincter relaxations in achalasia always incomplete? A manometric and scintigraphic study
No full textIn two patients with achalasia we found intermittent, complete lower oesophageal sphincter (LES) relaxations at manometric evaluation. These patients had no weight loss, minimal oesophageal dilation, lower LES pressure and faster radionuclide oesophageal emptying when compared with other achalasia patients. Concurrent performing of radionuclide oesophageal emptying and manometry showed that the complete relaxations (CRs) were too short and functionally unsuccessful. Our findings suggest that these patients may be at an earlier disease stage and that intermittent CRs of LES may occasionally occur in achalasia
Long-term treatment of duodenal ulcer with pirenzepine; gastric pH values and incidence of relapses: an open pilot study
No full textTwenty-three endoscopically healed duodenal ulcer patients entered a long-term treatment with pirenzepine for 1 year (two 25-mg tablets at breakfast and two tablets at bedtime). One day before and 7 days after the long-term treatment started, gastric pH and BAO were measured in each patient after fasting. The patients were clinically examined monthly and underwent endoscopy 4, 8 and 12 months after the trial started or when they complained of ulcer symptoms. Blood and urine laboratory tests were carried out before treatment began and 6 and 12 months afterwards. Eighteen of the 22 patients that completed the trial (82%) did not relapse. The statistical analysis tended to show a relationship between absence of pH increase and relapses. No severe side-effects or changes in the results of laboratory tests were observed
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