Spreading, Nonergodicity, and Selftrapping: a puzzle of interacting disordered lattice waves

Localization of waves by disorder is a fundamental physical problem encompassing a diverse spectrum of theoretical, experimental and numerical studies in the context of metal-insulator transitions, the quantum Hall effect, light propagation in photonic crystals, and dynamics of ultra-cold atoms in optical arrays, to name just a few examples. Large intensity light can induce nonlinear response, ultracold atomic gases can be tuned into an interacting regime, which leads again to nonlinear wave equations on a mean field level. The interplay between disorder and nonlinearity, their localizing and delocalizing effects is currently an intriguing and challenging issue in the field of lattice waves. In particular it leads to the prediction and observation of two different regimes of destruction of Anderson localization - asymptotic weak chaos, and intermediate strong chaos, separated by a crossover condition on densities. On the other side approximate full quantum interacting many body treatments were recently used to predict and obtain a novel many body localization transition, and two distinct phases - a localization phase, and a delocalization phase, both again separated by some typical density scale. We will discuss selftrapping, nonergodicity and nonGibbsean phases which are typical for such discrete models with particle number conservation and their relation to the above crossover and transition physics. We will also discuss potential connections to quantum many body theories.Comment: 13 pages in Springer International Publishing Switzerland 2016 1 M. Tlidi and M. G. Clerc (eds.), Nonlinear Dynamics: Materials, Theory and Experiment, Springer Proceedings in Physics 173. arXiv admin note: text overlap with arXiv:1405.112

Paravasation with cyclophosphamide - Case report of tissue necrosis in a patient with primary breast cancer

Background: Paravasation is a rare but severe complication of treatment with cytotoxic agents. Some anticancer drugs are considered to be of high toxicity (vesicant), some are merely irritant, and some are regarded as nearly non-toxic to healthy tissue as is the case with cyclophosphamide. Case Report: In this report, we present the first case of severe tissue damage caused by a paravasation of cyclophosphamide in a breast cancer patient receiving chemotherapy. Conclusion: Therefore, every attending oncological physician should be aware of the possibility of severe tissue damage as a consequence of cyclophosphamide paravasation

ASSESSMENT OF SERUM LIPID PROFILE IN HYPERTENSIVE PATIENTS: A CASE-CONTROL STUDY

Background: Hypertension and dyslipidemia are strongly associated with each other, and they are the most common risk factors for the development of the cardiovascular disease. Aim: Compare the serum lipid profile values among hypertensive patients and non-hypertensive individuals. Method: 30 patients with Hypertension and 30 age-matched non-hypertensive controls were included in the study. From the serum, total cholesterol levels were estimated by enzymatic (CHOD-PAP) colorimetric method, triglyceride by enzymatic (GPO-PAP) method, HDL-cholesterol and LDL-cholesterol were estimated using precipitant and Friedewald formula, by using commercially available reagent kits. Lipid profiles were compared with controls. Results: The mean values of total cholesterol were significantly more in Hypertensives-202.93 ± 28.44 and normotensives-178.76 ± 37.21, P<0.006. The mean values of triglycerides were significantly more in Hypertensives-139.8 ± 18.72 and normotensives-125.8± 12.34, P<0.001. The mean values of LDL-Cholesterol were significantly more in Hypertensives-141.63 ± 11.59 and normotensives-127.83 ± 14.65, P<0.0001. Conclusions: As Dyslipidemia is associated with Hypertension, serum lipid profile may be useful in the identification of patients at risk of Hypertension. Hypertensive patients need the measurement of blood pressure and lipid profile at regular intervals to prevent Cardiovascular diseases. Keywords: Cholesterol; Cardiovascular Diseases; Hypertension; Triglycerides; Dyslipidemia

ASSESSMENT OF SERUM LIPID PROFILE IN HYPERTENSIVE PATIENTS: A CASE-CONTROL STUDY

Background: Hypertension and dyslipidemia are strongly associated with each other, and they are the most common risk factors for the development of the cardiovascular disease. Aim: Compare the serum lipid profile values among hypertensive patients and non-hypertensive individuals. Method: 30 patients with Hypertension and 30 age-matched non-hypertensive controls were included in the study. From the serum, total cholesterol levels were estimated by enzymatic (CHOD-PAP) colorimetric method, triglyceride by enzymatic (GPO-PAP) method, HDL-cholesterol and LDL-cholesterol were estimated using precipitant and Friedewald formula, by using commercially available reagent kits. Lipid profiles were compared with controls. Results: The mean values of total cholesterol were significantly more in Hypertensives-202.93 ± 28.44 and normotensives-178.76 ± 37.21, P<0.006. The mean values of triglycerides were significantly more in Hypertensives-139.8 ± 18.72 and normotensives-125.8± 12.34, P<0.001. The mean values of LDL-Cholesterol were significantly more in Hypertensives-141.63 ± 11.59 and normotensives-127.83 ± 14.65, P<0.0001. Conclusions: As Dyslipidemia is associated with Hypertension, serum lipid profile may be useful in the identification of patients at risk of Hypertension. Hypertensive patients need the measurement of blood pressure and lipid profile at regular intervals to prevent Cardiovascular diseases. Keywords: Cholesterol; Cardiovascular Diseases; Hypertension; Triglycerides; Dyslipidemia

Exponential splitting of bound states in a waveguide with a pair of distant windows

We consider Laplacian in a straight planar strip with Dirichlet boundary which has two Neumann ``windows'' of the same length the centers of which are $2l$ apart, and study the asymptotic behaviour of the discrete spectrum as $l\to\infty$. It is shown that there are pairs of eigenvalues around each isolated eigenvalue of a single-window strip and their distances vanish exponentially in the limit $l\to\infty$. We derive an asymptotic expansion also in the case where a single window gives rise to a threshold resonance which the presence of the other window turns into a single isolated eigenvalue

The influence of structure geometry and material on seismic metamaterial performance

Diverting, and controlling, elastic vibrations impacting upon infrastructure is a major challenge for seismic hazard mitigation, and for the reduction of machine noise and vehicle vibration in the urban environment. Seismic metamaterials (SMs), with their inherent ability to manipulate wave propagation, provide a key route for overcoming the technological hurdles involved in this challenge. Engineering the structure of the SM serves as a basis to tune and enhance its functionality, and inspired by split rings, swiss-rolls, notch-shaped and labyrinthine designs of elementary cells in electromagnetic and mechanical metamaterials, we investigate altering the structure geometries of SMs with the aim of creating large bandgaps \textcolor{black}{in a subwavelength regime}. We show that square stiff inclusions, perform better in comparison to circular ones, whilst keeping the same filling fraction. En route to enhancing the bandgap, we have also studied the performance of SMs with different constituent materials; we find that steel columns, as inclusions, show large bandgaps, however, the columns are too large for steel to be a feasible material in practical or financial terms. Non-reinforced concrete would be preferable for industry level scaling up of the technology because, concrete is cost-effective, easy to cast directly at the construction site and easy to provide arbitrary geometry of the structure. As a part of this study, we show that concrete columns can also be designed to exhibit bandgaps if we cast them within a soft soil coating surrounding the protected area for various civil structures like a bridge, building, oil pipelines etc

Proprioception, gait kinematics, and rate of loading during walking: Are they related?

The cyclic nature of walking can lead to repetitive stress and associated complications due to the rate of loading (ROL) experienced by the body at the initial contact of the foot with the ground. An individual’s gait kinematics at initial contact have been suggested to give rise to the ROL, and a repetitive, high ROL may lead to several disorders, including osteoarthritis. Additionally, proprioception, the feedback signaling of limb position and movement, may play a role in how the foot strikes the ground and thus, the ROL. Our goal was to explore the relationship between proprioception, gait kinematics and ROL. Thirty-eight women were recruited for gait analysis, and the gait characteristics 50ms prior to and at initial contact were examined. Two proprioception tests, joint angle reproduction and threshold to detect passive motion were used to examine the subject’s proprioceptive acuity. Our results indicate that individuals with a larger knee angle (i.e., greater extension) 50ms prior to initial contact (IC) experience a higher ROL during gait and have poorer proprioceptive scores. However, it remains unclear whether poor proprioception causes a high ROL or if a high ROL damages the mechanoreceptors involved in proprioception, but the apparent relationship is significant and warrants further investigation

Balance and coordination after viewing stereoscopic 3D television.

Manufacturers and the media have raised the possibility that viewing stereoscopic 3D television (S3D TV) may cause temporary disruption to balance and visuomotor coordination. We looked for evidence of such effects in a laboratory-based study. Four hundred and thirty-three people aged 4-82 years old carried out tests of balance and coordination before and after viewing an 80 min movie in either conventional 2D or stereoscopic 3D, while wearing two triaxial accelerometers. Accelerometry produced little evidence of any change in body motion associated with S3D TV. We found no evidence that viewing the movie in S3D causes a detectable impairment in balance or in visuomotor coordination

Etude ethnobotanique des légumes feuilles thérapeutiques utilisés dans le traitement des diarrhées au sud-Bénin (Afrique de l’Ouest)

Les légumes-feuilles constituent d’excellents apports pour la diversification de l’alimentation humaine. La présente étude a permis d’identifier les légumes-feuilles à propriétés anti-diarrhéiques consommés à Cotonou et Abomey-Calavi (Sud-Bénin). A l’aide d’enquêtes basées sur la méthode d’Interview Semi-Structurée, il a été recensé vingt-sept (27) espèces de légumes feuilles regroupées en vingt-trois genres (23) et appartenant à dix-sept (17) familles botaniques. Les familles les plus représentées, en termes d’espèce, sont les Amaranthaceae et les Lamiaceae. Les espèces les plus consommées pour le traitement des infections diarrhéiques sont : Ocimum gratissimum L. (29,05%), Vernonia amygdalina Delile. (16,80%), Crateva adansonii DC. ssp adansonii (13,49%) et Sesamum radiatum L. (11,41%). Ces légumes-feuilles sont préparés à l’état frais ou séchés (poudres) puis consommés comme légume d’accompagnement (sauce) ou utilisés comme tisane. Ces résultats constituent la base d’études  ultérieures visant à évaluer expérimentalement les potentialités antibactériennes et anti-diarrhéiques de ces légumes-feuilles. Cela  permettra de mettre à la disposition des populations, des Médicaments Traditionnels Améliorés.Mots clés : Ethnobotanique, diarrhées, légumes feuilles, médecine traditionnelle

Controlling light-with-light without nonlinearity

According to Huygens' superposition principle, light beams traveling in a linear medium will pass though one another without mutual disturbance. Indeed, it is widely held that controlling light signals with light requires intense laser fields to facilitate beam interactions in nonlinear media, where the superposition principle can be broken. We demonstrate here that two coherent beams of light of arbitrarily low intensity can interact on a metamaterial layer of nanoscale thickness in such a way that one beam modulates the intensity of the other. We show that the interference of beams can eliminate the plasmonic Joule losses of light energy in the metamaterial or, in contrast, can lead to almost total absorbtion of light. Applications of this phenomenon may lie in ultrafast all-optical pulse-recovery devices, coherence filters and THz-bandwidth light-by-light modulators