Non-Syndromic Solitary Neurofibroma in floor of the mouth: A case report

Neurofibromas are rare in the head and neck region, but most frequent tumor of neural origin. Oral hard and soft tissue is affected bythe tumor. In this paper, we describe an unusual case of non-syndromic solitary neurofibroma of the floor of the mouth in a 70-yearfemalepatient with a chief complaint of growth in the floor of the mouth for the past 3 months. An occlusal, intraoral periapicalradiograph and CT imaging were done. After confirming the diagnosis, the lesion was excised under local anesthesia and the specimenwas submitted for histopathological examination. On subsequent follow-up, the patient was asymptomatic. Intraoral neurofibromaalthough uncommon, deserve special attention because of their similarity with other inflammatory neoplastic condition, and theirtendency to undergo malignant transformation

Fractional Quantum Hall States of Clustered Composite Fermions

The energy spectra and wavefunctions of up to 14 interacting quasielectrons (QE's) in the Laughlin nu=1/3 fractional quantum Hall (FQH) state are investigated using exact numerical diagonalization. It is shown that at sufficiently high density the QE's form pairs or larger clusters. This behavior, opposite to Laughlin correlations, invalidates the (sometimes invoked) reapplication of the composite fermion picture to the individual QE's. The series of finite-size incompressible ground states are identified at the QE filling factors nu_QE=1/2, 1/3, 2/3, corresponding to the electron fillings nu=3/8, 4/11, 5/13. The equivalent quasihole (QH) states occur at nu_QH=1/4, 1/5, 2/7, corresponding to nu=3/10, 4/13, 5/17. All these six novel FQH states were recently discovered experimentally. Detailed analysis indicates that QE or QH correlations in these states are different from those of well-known FQH electron states (e.g., Laughlin or Moore-Read states), leaving the origin of their incompressibility uncertain. Halperin's idea of Laughlin states of QP pairs is also explored, but is does not seem adequate.Comment: 14 pages, 9 figures; revision: 1 new figure, some new references, some new data, title chang

Editor's Choice - Infective Native Aortic Aneurysms: A Delphi Consensus Document on Terminology, Definition, Classification, Diagnosis, and Reporting Standards.

There is no consensus regarding the terminology, definition, classification, diagnostic criteria, and algorithm, or reporting standards for the disease of infective native aortic aneurysm (INAA), previously known as mycotic aneurysm. The aim of this study was to establish this by performing a consensus study. The Delphi methodology was used. Thirty-seven international experts were invited via mail to participate. Four two week Delphi rounds were performed, using an online questionnaire, initially with 22 statements and nine reporting items. The panellists rated the statements on a five point Likert scale. Comments on statements were analysed, statements revised, and results presented in iterative rounds. Consensus was defined as ≥ 75% of the panel selecting "strongly agree" or "agree" on the Likert scale, and consensus on the final assessment was defined as Cronbach's alpha coefficient > .80. All 38 panellists completed all four rounds, resulting in 100% participation and agreement that this study was necessary, and the term INAA was agreed to be optimal. Three more statements were added based on the results and comments of the panel, resulting in a final 25 statements and nine reporting items. All 25 statements reached an agreement of ≥ 87%, and all nine reporting items reached an agreement of 100%. The Cronbach's alpha increased for each consecutive round (round 1 = .84, round 2 = .87, round 3 = .90, and round 4 = .92). Thus, consensus was reached for all statements and reporting items. This Delphi study established the first consensus document on INAA regarding terminology, definition, classification, diagnostic criteria, and algorithm, as well as reporting standards. The results of this study create essential conditions for scientific research on this disease. The presented consensus will need future amendments in accordance with newly acquired knowledge

Wnt signalling and cancer stem cells

[Abstract] Intracellular signalling mediated by secreted Wnt proteins is essential for the establishment of cell fates and proper tissue patterning during embryo development and for the regulation of tissue homeostasis and stem cell function in adult tissues. Aberrant activation of Wnt signalling pathways has been directly linked to the genesis of different tumours. Here, the components and molecular mechanisms implicated in the transduction of Wnt signal, along with important results supporting a central role for this signalling pathway in stem cell function regulation and carcinogenesis will be briefly reviewed.Ministerio de Ciencia e Innovación; SAF2008-0060

Search for a heavy resonance decaying to a top quark and a w boson at √s = 13 tev in the fully hadronic final state

A search for a heavy resonance decaying to a top quark and a W boson in the fully hadronic final state is presented. The analysis is performed using data from proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 137 fb−1 recorded by the CMS experiment at the LHC. The search is focused on heavy resonances, where the decay products of each top quark or W boson are expected to be reconstructed as a single, large-radius jet with a distinct substructure. The production of an excited bottom quark, b*, is used as a benchmark when setting limits on the cross section for a heavy resonance decaying to a top quark and a W boson. The hypotheses of b* quarks with left-handed, right-handed, and vector-like chiralities are excluded at 95% confidence level for masses below 2.6, 2.8, and 3.1 TeV, respectively. These are the most stringent limits on the b* quark mass to date, extending the previous best limits by almost a factor of two

Diffusion de protons par 3He

En utilisant un programme de recherche automatique des paramètres du potentiel optique on a fait une analyse de la diffusion élastique de protons d'énergie comprise entre 1 MeV et 14 MeV par 3He

Quelques aspects des réactions induites par neutrons

On a calculé les sections efficaces de quelques réactions nucléaires induites par neutrons en employant la formule de Cameron donnant la densité des niveaux et en utilisant le potentiel du modèle optique pour obtenir les coefficients de transmission. Les valeurs théoriques ainsi obtenues sont comparées aux résultats expérimentaux

[Evolution technologique, auto-organisation et connaissance]

Egalement paru dans : Garcia, C.E. ; Sanz-Menedez, L. Management and technology. OPOCE, Luxembourg, 1998International audienceDans un précédent document les auteurs ont montré que l'évolution technologique est caractérisée à la fois par des périodes de rupture, mais également par de longues périodes de développement stable et croissant. Ici, les auteurs tentent d'établir les bases d'un traitement analytique des ruptures évoquées précédemment. Ce traitement analytique est fondé à la fois sur la théorie de la nucléation et sur un traitement généralisé du processus de génération de connaissance par le biais des activités de recherche. Les activités de recherche sont définies comme des activités qui analysent l'environnement extérieur pour trouver des alternatives aux routines existantes ou pour en trouver de complètement nouvelles

Le « spin cut-off factor » et l'énergie de corrélation pour 29Si

The spin cut-off factor and correlation energy for Si29 have been estimated from the fluctuations observed in the Si28(n, α)Mg 25 reaction.D'après les fluctuations observées dans la réaction 28Si(n, α) 25Mg on a estimé le facteur « spin cut-off » et l'énergie de corrélation pour 29Si