232 research outputs found
A NEW TECHNIQUE OF HYSTEROSCOPIC MYOMECTOMY WITH ENUCLEATION IN TOTO
No full textStudy Objective. To determine the safety and effectiveness of a new technique for hysteroscopic resection of uterine submucous myomas with high intramural involvement (G2 type, European Society of Hysteroscopy classification). Design. Prospective study (Canadian Task Force classification II-1). Setting. University hospital. Patients. Forty-four women. Intervention. Hysteroscopic myoma enucleation in toto. Measurements and Main Results. With a hysteroresectoscope and Collins electrode, an elliptic incision of endometrial mucosa that covers the myoma is made at the level of its reflection on the uterine wall until the cleavage zone of the myoma is reached. Connecting bridges between myoma and surrounding muscle fibers are resected. This allows nearly complete protrusion of the myoma into the uterine cavity, facilitating complete myomectomy by slicing. The procedure was performed in 41 (93.1%) of 44 women. Of these, 38 (92.6%) had myomas between 2 and 4 cm in diameter and 3 (7.4%) had myomas exceeding 4 cm. Mean operating time was 27 minutes (range 10-45 min). Conclusion. This technique is efficient and allows complete resection of submucous myomas with large intramural component by favoring intracavitary protrusion of that par
Ulrich Beck: modernità e cosmopolitismo fra Occidente e non-Occidente
No full textQuesto contributo offre alcune considerazioni su due dei temi centrali della riflessione di Ulrich Beck: la (ri)formulazione dell'idea di modernità nei termini di "seconda modernità"; e la conseguente esigenza di formulazione di un adeguato corredo metodologico e concettuale di impronta cosmopolita per l'analisi di questa nuova condizione della storia dell'umanità.
L'idea di una "seconda modernità", proiettata al di là dei caratteri industriali e delle categorie interpretative della modernità classica, nell'offrire un'alternativa alla tesi dell'avvento di una condizione postmoderna, ne coopta e neutralizza la critica, facendo uso dell'incertezza epistemologica prodotta dalla crisi dei fondamenti scientifici moderni per sancire teoricamente e legittimare un'incertezza sociale a sua volta deterministicamente ricondotta all'avvento di una società – anche globale – del rischio.
La proposta di un cosmopolitismo metodologico come necessario per l'analisi della seconda modernità elude la questione relativa all'inadeguatezza di categorie analitiche metodologicamente nazionaliste per lo studio della prima modernità; e, al tempo stesso, marginalizza o silenzia, eurocentricamente, tanto il ruolo costitutivo del mondo non occidentale nella genealogia intellettuale e istituzionale della modernità, quanto il "lato oscuro" di quest'ultima così come definita dall'Occidente
PGO models in the envelope function and effective mass approximations
No full textA recipe to design quantum devices that exhibit the theoretical pseudo-Gaussian oscillator electronic states properties is given. The algorithm is described en detail and is illustrated by the computation of a Mn x Cd 1- x Te ternary alloy pseudo-Gaussian heterostructure. The numerical procedure reaches beyond of pseudo-Gaussian models and can be used for designing epitaxial growth devices with desired electronic states structure. The calculations are carried out in the envelope function and effective mass approximations. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2011
A HYBRID MODEL FOR QUANTUM WELL SOLAR CELLS
No full text Quantum and classical components are blended together in this proposed theoretical model for describing multiple quantum well solar cells (MQWSC) in a p-i-n architecture. The model characteristics are: the use of transfer matrix as a quantum method for finding allowed energies in the coupled quantum wells, the connection of the absorption coefficient in the confined 2D structure to the one in the bulk semiconductor, and the treatment of the whole cell as a pseudo-homogeneous media to determine its reflectance. The resulted model is intended to be a working tool to assess electro-optical properties of MQWSC. Numerical results which relate the performance of the MQWSC to its structure are reported. </jats:p
Weather Modeling and Forecasting of PV Systems Operation
No full textXVIII, 355 p. 166 illus.online resource
Strong constraints on jet quenching in centrality-dependent +Pb collisions at 5.02 TeV from ATLAS
No full textJet quenching is the process of color-charged partons losing energy via interactions with quark-gluon plasma droplets created in heavy-ion collisions. The collective expansion of such droplets is well described by viscous hydrodynamics. Similar evidence of collectivity is consistently observed in smaller collision systems, including and +Pb collisions. In contrast, while jet quenching is observed in Pb+Pb collisions, no evidence has been found in these small systems to date, raising fundamental questions about the nature of the system created in these collisions. The ATLAS experiment at the Large Hadron Collider has measured the yield of charged hadrons correlated with reconstructed jets in 0.36 nb of +Pb and 3.6 pb of collisions at 5.02 TeV. The yields of charged hadrons with GeV near and opposite in azimuth to jets with or 60 GeV, and the ratios of these yields between +Pb and collisions, , are reported. The collision centrality of +Pb events is categorized by the energy deposited by forward neutrons from the struck nucleus. The values are consistent with unity within a few percent for hadrons with GeV at all centralities. These data provide new, strong constraints which preclude almost any parton energy loss in central +Pb collisions
Strong Constraints on Jet Quenching in Centrality-Dependent p plus Pb Collisions at 5.02 TeV from ATLAS
No full textJet quenching is the process of color-charged partons losing energy via interactions with quark-gluon plasma droplets created in heavy-ion collisions. The collective expansion of such droplets is well described by viscous hydrodynamics. Similar evidence of collectivity is consistently observed in smaller collision systems, including p p and p + Pb collisions. In contrast, while jet quenching is observed in Pb + Pb collisions, no evidence has been found in these small systems to date, raising fundamental questions about the nature of the system created in these collisions. The ATLAS experiment at the Large Hadron Collider has measured the yield of charged hadrons correlated with reconstructed jets in 0.36 nb - 1 of p + Pb and 3.6 pb - 1 of p p collisions at 5.02 TeV. The yields of charged hadrons with p T ch > 0.5 GeV near and opposite in azimuth to jets with p T jet > 30 or 60 GeV, and the ratios of these yields between p + Pb and p p collisions, I p Pb , are reported. The collision centrality of p + Pb events is categorized by the energy deposited by forward neutrons from the struck nucleus. The I p Pb values are consistent with unity within a few percent for hadrons with p T ch > 4 GeV at all centralities. These data provide new, strong constraints that preclude almost any parton energy loss in central p + Pb collisions
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