Search results for "Jet"
showing 10 items of 4711 documents
Laboratory disruption of scaled astrophysical outflows by a misaligned magnetic field
2021
The shaping of astrophysical outflows into bright, dense, and collimated jets due to magnetic pressure is here investigated using laboratory experiments. Here we look at the impact on jet collimation of a misalignment between the outflow, as it stems from the source, and the magnetic field. For small misalignments, a magnetic nozzle forms and redirects the outflow in a collimated jet. For growing misalignments, this nozzle becomes increasingly asymmetric, disrupting jet formation. Our results thus suggest outflow/magnetic field misalignment to be a plausible key process regulating jet collimation in a variety of objects from our Sun’s outflows to extragalatic jets. Furthermore, they provide…
Comparison of tritium measurement techniques for a laser cleaned JET tile
2014
Abstract Over the last 7–8 years, two quantitative analyzing methods—accelerator mass spectrometry (AMS) and full combustion (FC) followed by scintillation detection have been applied for determining the tritium activity concentrations in JET divertor tiles. These methods have two main differences – the range of detection and the spatial resolution – and are thus complementary. However, these differences can also complicate the comparison of the two techniques for typical JET divertor samples. Therefore a cross comparison exercise for tritium measurements was performed between the two methods using specially produced identical standard samples. The cross comparison measurements were perform…
Measurement of the forward-backward asymmetry of e(+)e(-)-]z-]b(b)over-bar using prompt leptons and a lifetime tag
1995
The forward-backward asymmetry of the process e+e-→Z→b {Mathematical expression} has been measured using events collected by the DELPHI experiment during the 1991 and 1992 LEP runs. This data sample corresponded to 884 000 hadronic Z decays at a centre-of-mass energy {Mathematical expression}. The tagging of b-quark events was performed using two approaches; the first was based on the semileptonic decay channels b→X+μ and b→X+e, the second used a lifetime tag with jet-charge reconstruction. The results of these two methods were combined to give {Mathematical expression} With the semileptonic sample, the forward-backward asymmetry of the process e+e-→Z→ {Mathematical expression} was also mea…
Del acceso a la fragmentación del bienestar: Los servicios sociales de atención y desarrollo local en España
2018
Los Servicios Sociales son instrumentos al servicio de la política social para alcanzar objetivos de bienestar, calidad de vida y prosperidad de la población a que atienden. El presente documento muestra un breve repaso a la aparición de los Servicios Sociales en España, su génesis, evolución y la situación actual. Es objetivo del presente trabajo, mostrar la distinta implementación de los Servicios Sociales en el territorio español, dependiendo de la voluntad político-legislativa. Finalmente se destaca el preponderante papel de las rentas para la inserción de los usuarios de servicios sociales, la importancia de dimensionar la universalidad de los mismos como principio instaurador y la s…
EFFECT OF FRUIT-SET TIME ON THE QUALITY PERFORMANCE OF ANNONA CHERIMOLA MILL. FRUIT
2019
The aim of this work was to analyze the differences between fruits obtained by different dates of fruit set and identify the proper fruit-set time that allows to obtain the optimum fruit quality in Annona cherimola cv Fino de Jete, planted in Southern Italy. Six fruit-set dates were selected from the first week of June to the second week of July. Fruits were sampled from October to November, when 1500 Growing Degree Days (DD) were accumulated; The DD were calculated using a base temperature of 12 °C. Fruit fresh weight (FW) and skin colour were measured. These parameters were measured also after storage, and in addition, the following parameters were measured: fruit shape (FS), pulp colour,…
X-ray emission mechanisms in protostellar jets
2005
Prompted by the recent detection of X-ray emission from Herbig-Haro objects, we studied the interaction between a supersonic jet originating from a young stellar object and the ambient medium; our aim is to investigate the mechanisms causing the X-ray emission. Our model takes into account the radiative losses from optically in plasmas and Spitzer's thermal conduction including saturation effects. We explored the parameter space defined by the density contrast between the ambient medium and the jet and by the Mach number, to infer the configurations which can give rise to X-ray emission. From the models, we derived the X-ray emission as it would be observed with Chandra/ACIS-I and XMM-Newto…
La Faculté d’architecture de Palerme
2020
Depuis sa fondation en 1944 au cœur du centre historique, la faculté d’architecture de l’université de Palerme a connu plusieurs sièges. en 1998, elle est transférée dans le campus universitaire de 40 ha créé aux portes de la ville dans l’après-guerre. le bâtiment qui l’abrite est le fruit d’un processus long et tortueux, entamé en 1983; en cours de construction, étudiants et enseignants s’y installent comme ils peuvent. Conçu par deux ténors de l’architecture de l’Italie du Sud, Pasquale Culotta (1939-2006) et Giuseppe leone (1936-2012), en collaboration avec Giuseppe laudicina et Tilde marra, l’édifice correspond à la troi- sième mouture d’un projet qui a changé de site et de programme au…
Antichi sbarchi e nuove mete di libertà
2016
Il progetto per VILLARD 16: "Territori Strategici: Antichi sbarchi e nuove mete di libertà", prevede la riconfigurazione urbana di tre diverse zone di Pozzallo, con la dislocazione di attività utili all’accoglienza degli sbarchi dei migranti, tema attuale per la città. Il progetto vuole ridisegnare i vuoti urbani presenti nella città e dislocati tra Lungomare Raganzino, Torre Cabrera, la ex colonia del mare, la parte finale del lungomare Pietrenere, attraverso nuovi spazi pubblici. Il progetto per la 2°area, Lungomare Raganzino, prevede la riconfigurazione del vuoto urbano rettangolare, più vicino alla città, attraverso la dislocazione di due elementi da utilizzare come un mercato che si ap…
“Main basse” (adroitement) sur la ville
2016
Uno degli obiettivi della ricerca architettonica consiste nel comprendere i processi attraverso i quali il progetto costruisce nuove identità per la città contemporanea esprimendo una compiuta modificazione dello spazio fisico. Si tratta di restituire rinnovata coerenza ai luoghi dell’accumulazione, che hanno smarrito il senso e la misura o ai luoghi antichi, sommersi come sono da incessanti ed eterogenee stratificazioni. Ogni volta che ci si volge ad Agrigento con sguardo autentico, finalmente interessati all’interpretazione radicale della sua forma e alle ragioni molteplici del suo sviluppo, s’individua per questa città una prospettiva di modernità. Essa consiste essenzialmente nella riap…
(progetto) Requalification du centre historique. Benevent, Italie.
2007
Violemment bombardée en 1943, la cité campanienne de Bénévent a subi l'absence de conscience historique des décideurs de l'après-guerre. Un concours d'idées national vient d'être lancé pour la valorisation du secteur le plus dégradé du centre ancien. Le projet de l'équipe lauréate - Pasquale Culotta, Riccardo Florio et Andrea Sciascia - présentait aux yeux du jury l'intérêt d'avoir appliqué le principe de la contemporanéité à des hypothèses de travail et de principes d'intervention issus d'une compréhension sensible de la morphologie, de la topographie et du lieu.