Search results for " Bundle"
showing 10 items of 217 documents
Some families of big and stable bundles on $K3$ surfaces and on their Hilbert schemes of points
2021
Here we investigate meaningful families of vector bundles on a very general polarized $K3$ surface $(X,H)$ and on the corresponding Hyper--Kaehler variety given by the Hilbert scheme of points $X^{[k]}:= {\rm Hilb}^k(X)$, for any integer $k \geqslant 2$. In particular, we prove results concerning bigness and stability of such bundles. First, we give conditions on integers $n$ such that the twist of the tangent bundle of $X$ by the line bundle $nH$ is big and stable on~$X$; we then prove a similar result for a natural twist of the tangent bundle of $X^{[k]}$. Next, we prove global generation, bigness and stability results for tautological bundles on $X^{[k]}$ arising either from line bundles…
On the K-stability of complete intersections in polarized manifolds
2011
We consider the problem of existence of constant scalar curvature Kaehler metrics on complete intersections of sections of vector bundles. In particular we give general formulas relating the Futaki invariant of such a manifold to the weight of sections defining it and to the Futaki invariant of the ambient manifold. As applications we give a new Mukai-Umemura-Tian like example of Fano 5-fold admitting no Kaehler-Einstein metric and a strong evidence of K-stability of complete intersections on Grassmannians.
Left bundle branch block and myocardial infarction, a diagnosis not always easy: Our experience and review of literature
2012
The occurrence of left bundle branch block (LBBB) is quite common in clinical practice. The changes in cardiac repolarization, caused by this disorder of electric conduction, may mask the presence of an acute myocardial infarction (AMI), delaying the diagnostic-therapeutic iter, with an important impact on prognosis. We describe the case of a woman of 59 years with LBBB, came to our observation for a constrictive chest pain associated with dyspnea. The diagnostic workup for suspected acute coronary syndrome (ACS), initially conducted only on the analysis of the electrocardiogram (negative TnI at entry), showed the presence of coronary arteries free of stenosis. However, the diagnostic confi…
Leksinių samplaikų sąrašo tikslinimas: bandymas taikyti "Formulex" metodą
2016
Svetimkalbių vartotojų produkuojamos kalbos tekstynai pastaruoju metu neretai tiriami aprašant leksines samplaikas, t. y. pasikartojančias tam tikro ilgio žodžių sekas, jų vartojimą bei funkcijas. Tokiuose tyrimuose neišvengiamai susiduriama su iš dalies sutampančiomis ar nepilnos struktūros samplaikomis. Pavyzdžiui, keturžodės anglų kalbos samplaikos at the same time, the same time it ir but at the same yra automatiškai generuojamos kompiuterio programa kaip tekstyne pasikartojančios sekos. Tačiau ar kiekviena jų laikytina tikrąja samplaika? Ar kiekvienai iš jų galima priskirti vienokią ar kitokią funkciją? Šiame straipsnyje siekiama parodyti, kaip „Formulex” metodas (Forsyth, 2015a, 2015b…
Applications of Pattern-driven Methods in Corpus Linguistics
2018
The use of corpora has conventionally been envisioned as being either corpus-based or corpus-driven. While the formal definition of the latter term has been widely accepted since it was established by Tognini-Bonelli (2001), it is often applied to studies that do not, in fact, fullfil the fundamental requirement of a theory-neutral starting point. This volume proposes the term pattern-driven as a more precise alternative. The chapters illustrate a variety of methods that fall under this broad methodology, such as the extraction of lexical bundles, POS-grams and semantic frames, and demonstrate how these approaches can uncover new understandings of both synchronic and diachronic linguistic p…
Chapter 9. Join us for this
2018
Changes in dimension of neurovascular canals in the mandible and maxilla: A radiographic finding in patients diagnosed with MRONJ.
2017
Background The aim of this retrospective study was to compare the morphological features of neurovascular canals and foramina of patients with medication-related osteonecrosis of the jaws (MRONJ) and healthy individuals by using cone beam computed tomography (CBCT). Material and Methods The CBCT images of 58 patients under bisphosphonate therapy diagnosed with MRONJ and age gender- matched controls were retrospectively evaluated. The diameter of mandibular and nasopalatine canal and mandibular, mental and lingual foramina were measured on several sections of CBCT. The value of mental index (MI) and panoramic mandibular index (PMI) were also assessed. Results The mean value of diametric meas…
The influence of local capsaicin treatment on small nerve fibre function and neurovascular control in symptomatic diabetic neuropathy.
2002
Topical treatment with capsaicin cream has been shown to be successful in the treatment of different symptomatic nerve disorders like diabetic neuropathy. Conflicting data exist on the effect of capsaicin on nerve function and neurovascular control especially in patients with diabetic neuropathy. The aim of this pilot study was to investigate the impact of topical capsaicin application on small nerve fibre function and neurovascular control. Capsaicin cream was applied to the feet of 13 patients with symptomatic diabetic neuropathy over a period of 8 weeks. Before and during the treatment period, we investigated the total symptoms score, the vibration, thermal (heat and cold) and pain perce…
Successful control of a Methicillin-resistant Staphylococcus aureus outbreak in a neonatal intensive care unit: a retrospective, before-after study
2013
International audience; Background : Aim of this study was to provide a detailed description of a Methicillin-resistant Staphylococcus aureus (MRSA) outbreak management strategy in the neonatal intensive care unit of a university hospital.MethodsThis was a retrospective, “before-after” study, over two consecutive 18-month periods. The outbreak management strategy was performed by a multidisciplinary team and included: extensive healthcare workers (HCW) involvement, education, continuous hand-hygiene training and active MRSA colonization surveillance. The actions implemented were identified based on an anonymous, voluntary, reporting system, carried out among all the HCW, and regular audit a…
A curved Lowsley retractor improves manoeuvrability of the prostate during ascending radical retropubic prostatectomy
2007
Worldwide, radical retropubic prostatectomy is the commonest surgical procedure for treating localized prostate cancer. The technique has evolved continuously over the years, yielding improved continence and potency while reducing considerably the associated complications. Simple surgical ‘tricks’ have been proposed for crucial steps, e.g. the control of the dorsal venous complex, atraumatic dissection of the neurovascular bundles (NVBs), improved visualization of the urethral stump and tailoring of the vesicourethral anastomosis [1,2].