Emergence of curved light-cones in a class of inhomogeneous Luttinger liquids

The light-cone spreading of entanglement and correlation is a fundamental and ubiquitous feature of homogeneous extended quantum systems. Here we point out that a class of inhomogenous Luttinger liquids (those with a uniform Luttinger parameter K) at low energy display the universal phenomenon of curved light cones: gapless excitations propagate along the null geodesics of the metric ds(2) = d x(2) - v (x)(2)d t(2), with v (x) being the calculable spatial dependent velocity induced by the inhomogeneity. We confirm our findings with explicit analytic and numerical calculations both in-and out-of-equilibrium for a Tonks-Girardeau gas in a harmonic potential and in lattice systems with artificially tuned hamiltonian density

Edge Magneto-Fingerprints in Disordered Graphene Nanoribbons

We report on (magneto)-transport experiments in chemically derived narrow graphene nanoribbons under high magnetic fields (up to 60 Tesla). Evidences of field-dependent electronic confinement features are given, and allow estimating the possible ribbon edge symmetry. Besides, the measured large positive magnetoconductance indicates a strong suppression of backscattering induced by the magnetic field. Such scenario is supported by quantum simulations which consider different types of underlying disorders (smooth edge disorder and long range Coulomb scatters).Comment: 4 pages, 4 figure

Ultrasound evaluation of pelvic masses seen within a university gynecologic oncology clinic: does the scan location matter?

To quantify variations in the reporting of ultrasound characteristics of adnexal masses between local ultrasound centers and a tertiary care center for women referred to gynecologic oncology for evaluation of a pelvic mass. This study also sought to evaluate whether a gynecologic oncologist’s impression regarding the suspicion for malignancy differed based upon the information provided in the local ultrasound report as compared to the tertiary care center ultrasound report

The effect of weight-based chemotherapy dosing in a cohort of gynecologic oncology patients

The American Society of Clinical Oncology recommends that full weight-based doses of chemotherapy be used to treat obese patients with cancer. However, many oncologists limit the dose of chemotherapy based on ideal body weight or a maximum body surface area (BSA) of m2. The objective of our study is to determine how weight-based chemotherapy dosing affects toxicity, treatment delays, and laboratory values in a cohort of obese gynecologic cancer patients at our institution. We hypothesize that full weight-based dosing in obese patients does not increase adverse chemotherapy outcomes

Figure of merits of 28nm Si technologies for implementing laser attack resistant security dedicated circuits

International audienceAmong all means to attack a security dedicated circuit, fault injection by means of laser illumination is a very efficient one. The laser beam creates electrons/holes pairs along its way through the silicon. The collection of these charges creates a transient current and thus may induce a fault in the circuit. Nevertheless the collection efficiency depends on various parameters including the technology used to implement the circuit. Here, up-to-date Bulk and Fully Depleted Silicon on Insulator (FD-SOI) 28nm technologies are compared in terms of sensitivity against laser injection. It comes out that FD-SOI structures show less sensitivity to laser injection and thus should be further explored for security dedicated circuits implementations

Unveiling the Landau Levels Structure of Graphene Nanoribbons

Magnetotransport measurements are performed in ultraclean (lithographically patterned) graphene nanoribbons down to 70 nm. At high magnetic fields, a fragmentation of the electronic spectrum into a Landau levels pattern with unusual features is unveiled. The singular Landau spectrum reveals large magneto-oscillations of the Fermi energy and valley degeneracy lifting. Quantum simulations suggest some disorder threshold at the origin of mixing between opposite chiral magnetic edge states and disappearance of quantum Hall effect

Mass Transfer in VOC Adsorption on Zeolite : Experimental and Theoretical Breakthrough Curves

From experimental results of adsorption of volatile organic compounds (VOCs) on zeolite, we propose simulations of the breakthrough curves based on the Linear Driving Force model. Experiments were run on fixed beds of hydrophobic commercial zeolites. Pollutants chosen are from several chemical classes with different polarities. A good agreement between experimental and numerical results is found when an adjustable value of the internal mass-transfer coefficient is used. A constant value of effective diffusivity is found independent of the nature and the amount of VOCs adsorbed. A relation linking intrapellet mass-transfer coefficient and equilibrium constant is proposed, including the average effective diffusivity, to make predictions of breakthrough curves for any kind of volatile organic pollutant in gaseous effluent

Small cell carcinoma of the cervix: a retrospective analysis of characteristics important in outcomes

To assess clinical characteristics and treatment modalities in patients with small cell carcinoma of the cervix and the effect this has on overall (OS) and recurrence free survival (RFS)

Single incision laparo-endoscopic surgery (SILS) is comparable with robotic surgery at a tertiary care center for the management of gynecologic oncology patients

A shift toward minimally invasive surgical techniques has been implemented in the surgical management of gynecologic oncology patients. Over the course of 18 months, we have established a single incision laparo-endoscopic surgery program (SILS), and incorporated it in the management of our patients. We sought to assess the operative and postoperative outcomes of these patients in relation to patients who underwent robotic surgery during that same time period at our institution

Ovariectomized rats as a model of postmenopausal osteoarthritis: validation and application

We aimed to assess the effect of ovariectomy on cartilage turnover and degradation, to evaluate whether ovariectomized (OVX) rats could form an experimental model of postmenopausal osteoarthritis. The effect of ovariectomy on cartilage was studied using two cohorts of female Sprague–Dawley rats, aged 5 and 7 months. In a third cohort, the effect of exogenous estrogen and a selective estrogen receptor modulator was analyzed. Knee joints were assessed by histological analysis of the articular cartilage after 9 weeks. Cartilage turnover was measured in urine by an immunoassay specific for collagen type II degradation products (CTX-II), and bone resorption was quantified in serum using an assay for bone collagen type I fragments (CTX-I). Surface erosion in the cartilage of the knee was more severe in OVX rats than in sham-operated animals, particularly in the 7-month-old cohort (P = 0.008). Ovariectomy also significant increased CTX-I and CTX-II. Both the absolute levels of CTX-II and the relative changes from baseline seen at week 4 correlated strongly with the severity of cartilage surface erosion at termination (r = 0.74, P < 0.01). Both estrogen and the selective estrogen receptor modulator inhibited the ovariectomy-induced acceleration of cartilage and bone turnover and significantly suppressed cartilage degradation and erosion seen in vehicle-treated OVX rats. The study indicates that estrogen deficiency accelerates cartilage turnover and increases cartilage surface erosion. OVX rats provide a useful experimental model for the evaluation of the chondroprotective effects of estrogens and estrogen-like substances and the model may be an in vivo representation of osteoarthritis in postmenopausal women