Global Observer for Homogegeous Vector Fields

This paper presents an algebraic approach to the problem of nonlinear observer design. We show, that an observer which converges globally and asymptotically can be designed for a class of homogeneous systems of odd degree

Hydrodynamic Effects in the Symmetron and f(R)f(R)-gravity Models

In this paper we present the first results from implementing two scalar-tensor modified gravity theories, the symmetron and the Hu-Sawicki $f(R)$-gravity model, into a hydrodynamic N-body code with dark matter particles and a baryonic ideal gas. The study is a continuation of previous work where the symmetron and $f(R)$ have been successfully implemented in the RAMSES code, but for dark matter only. By running simulations, we show that the deviation from $\Lambda$CDM in these models for the gas density profiles are significantly lower than the dark matter equivalents. When it comes to the matter power-spectrum we find that hydrodynamic simulations agree very well with dark matter only simulations as long as we consider scales larger than $k\sim 0.5$ h/Mpc. In general the effects of modified gravity on the baryonic gas is found to not always mirror the effects it has on the dark matter. The largest signature is found when considering temperature profiles. We find that the gas temperatures in the modified gravity model studied here show deviations, when compared to $\Lambda$CDM, that can be a factor of a few larger than the deviations found in density profiles and power spectra.Comment: 11 pages, 10 figures, submitted to MNRA

Study of Some Biochemical Parameters in Iraqi Children with Acute Lymphoblastic Leukemia

Leukemia or cancer of the blood is the most common childhood cancer, Acute lymphoblastic leukemia (ALL), is the most common form of leukemia that occurs in children. It is characterized by the presence of too many immature white blood cells in the child’s blood and bone marrow, Acute lymphoblastic leukemia can occur in adults too, treatment is different for children. Children with ALL develop symptoms related to infiltration of blasts in the bone marrow, lymphoid system, and extramedullary sites, such as the central nervous system (CNS). Common constitutional indications consist of fatigue (50%), pallor (25%), fever (60%), and weight loss (26%). Infiltration of blast cells in the marrow cavity and periosteum often lead to bone pain (23%) and disturbance of normal hematopoiesis. Thrombocytopenia with platelet counts less than 100,000 are seen in approximately 75% of patients. About 40% of patients with childhood ALL present with hemoglobin levels less than 7 g/dL. Although leukocyte counts greater than 50,000/mm3 occur in 20% of cases, neutropenia defined as an absolute neutrophil count less than 500 is common at presentation and is associated with an increased risk of infection. The aim of this study was to investigate the differentiations in some biochemical parameters (Hb, PCV, total serum proteins Aspartate amino transferase(AST), Alanin amino transferase (ALT), and Malondialdehyde (MDA) in blood which can be conceder as a marker of ALL. Samples were collected from 50 patients (between 1-16 years old) diagnosed with ALL after one month treatment with induction therapy, compared with 30 control samples taken from healthy persons at the same age . The ALT and MDA showed a significant increase p < 0.001 and

Circle and Popov Criterion for Output Feedback Stabilization of Uncertain Systems

In this paper, we address the problem of output feedback stabilization&nbsp;for a class of uncertain dynamical systems. An asymptotically stabilizing&nbsp;controller is proposed under the assumption that the nominal system is&nbsp;absolutely stable

L’endocardite à Bartonella en Tunisie: Particularités lésionnelles et évolutives

L'endocardite à Bartonalla est une infection ubiquitaire, son diagnostic est difficile vu qu'il s'agit souvent d'endocardite à hémoculture négative. Lebut de cette étude est d'analyser les particularités lésionnelles et  évolutives de cette entité dans un pays du nord d'Afrique, la Tunisie et dedémontrer la gravité de cette infection. Nous avons étudié  rétrospectivement les dossiers médicaux de 20 patients atteints  d'endocardite à Bartonella, confirmée selon les critères de Dukes modifiés. L'âge moyen de nos patients était 37 ans avec une prédominance  masculine (SR=3). Tous nos malades avaient un niveau socio-économique bas. Le motif essentiel de consultation était la dyspnée, 6 patients étaient admis dans un tableau d'insuffisance cardiaque congestive. Une  prédilection des lésions au niveau de la valve aortique a été notée (14 cas). Quatorze patients avaient des végétations endocarditiques avec une taille qui dépasse 10 mm chez 8 malades. La majorité des patients (18 patients) présentaient une régurgitation valvulaire massive en rapport principalement avec des mutilations importantes (6 cas de ruptures de cordages mitraux, 2 cas de déchirures des sigmoïdes aortiques, un cas de perforation valvulaire aortique, un cas de désinsertion de prothèse  mitrale). Quinze malades (3/4) avaient nécessité une chirurgie à la phase active de la maladie, l'indication majeure était l'insuffisance cardiaque. Une complication neurologique était notée chez 2 malades et une  complication rénale chez 3 malades. Treize patients étaient guéris, 5 malades étaient décédés et 2 malades opérés ont présenté une  réinfection à staphylococcus aureus et à candida albicans en  postopératoire. L'endocardite à Bartonella est une infection grave. Cette Bactérie possède un potentiel destructif important. Le recours à la chirurgie est quasi constant. La morbi-mortalité est élevée. La recherche de cette bactérie devrait être alors systématique chez nos malades suspects d'endocardite d'autant plus que la bartonellose est endémique sur nos terres

Value of routine ultrasound examination at 35-37 weeks' gestation in diagnosis of fetal abnormalities

Objective: To investigate the potential value of routine ultrasound examination at 35-37 weeks’ gestation in the diagnosis of previously unknown fetal abnormalities. Methods: This was a prospective study in 52,401 singleton pregnancies attending for a routine ultrasound examination at 35+0 - 36+6 weeks’ gestation; all pregnancies had a previous scan at 18-24 weeks and 47,215 also had a scan at 11-13 weeks. We included pregnancies resulting in livebirth or stillbirth but excluded those with known chromosomal abnormalities. The abnormalities were classified according to affected major organ system and the type and incidence of new abnormalities was determined. Results: In the study population the incidence of fetal abnormalities was 2.2% (1,168 / 52,401), including 847 (72.5%) that had been previously diagnosed during the first and / or second trimester, 247 (21.2%) that were detected for the first time at 35-37 weeks and 74 (6.3%) that were detected for the first time postnatally. The most common abnormalities that were diagnosed during the first and / or second trimester, that were also observed at 35-37 weeks, included aberrant right subclavian artery, ventricular septal defect, talipes, unilateral renal agenesis and / or pelvic kidney, hydronephrosis, duplex kidney or unilateral multicystic kidney, cystic pulmonary airway malformation, ventriculomegaly, cleft lip and palate, polydactyly,abdominal cyst or gastroschisis. The most common abnormalities seen at 35-37 weeks were hydronephrosis, mild ventriculomegaly, ventricular septal defect, duplex kidney, ovarian cyst and arachnoid cyst. The incidence of abnormalities first seen at 35-37 weeks was 0.5% and the most common were ovarian cysts, microcephaly, achondroplasia, dacryocystocele and hematocolpos. The incidence of abnormalities first seen postnatally was 0.1% and the most common were isolated cleft palate, polydactyly or syndactyly and ambiguous genitalia or hypospadias; prenatal examination of the genitalia was not a compulsory part of the protocol. Conclusions: A high proportion of fetal abnormalities are detected for the first time during a routine ultrasound examination at 35-37 weeks’ gestation. Such diagnosis and subsequent management, including selection of time and place for delivery and postnatal investigations, could potentially improve postnatal outcome

Acoustical and thermodynamic study of binary mixture cyclohexane-methanol using ultrasonic interferometer at different temperatures

The ultrasonic velocity (U) mass density (ρ) and shear viscosity (η) of the binary liquid mixtures of cyclohexane-methanol have been determined experimentally in the single-phase region and over the whole composition range at temperature range (T = 321.15 to 325.15 K). The experimental measurements of these properties have been carried out at atmospheric pressure, for a constant frequency 2 MHz. From these experimental data values, various acoustic and thermodynamic parameters namely adiabatic compressibility (βs), acoustic impedance (Z), intermolecular free length (Lf), relaxation time (τ), molar volume (Vm), free volume (Vf), internal pressure (πi), attenuation (α/f2), Gibb’s energy (ΔG), and cohesive energy (CE) have been calculated. Also their excess values have been calculated. All these parameters and their excess values have been interpreted in terms of molecular interaction such as dipole-dipole and dipole induced dipole interactions through hydrogen bonding between components of binary liquid mixture

3D MPSoC Design Using 2D EDA tools: Analysis of Parameters

International audienceDesign space exploration of 3D MPSoC architecture is reported in this paper analyzing the impact of 2D EDA tools to the 3D architecture performance. In particular, we study how 3D performance is varied when changing the EDA tools options intending to highlight design issues of 3D design. Results show that 3D timing performance is affected greatly compared with power consumption and total wirelength

Laryngectomie totale résultats de l’expérience du service d’orl de sfax

Introduction : La laryngectomie totale (LT) reste l’intervention la plus réalisée dans notre pays pour les cancers laryngés. Le but de ce travail est d’évaluer les résultats postopératoires et évolutifs des malades ayant eu une LT. Matériel et méthodes : Il s’agit d’une étude rétrospective à propos de 187 cas de patients ayant eu une laryngectomie totale, sur une période de 19 ans (1987-2005). La tumeur a été classée T3T4 dans 87,8 % des cas. L’atteinte des 3étages était trouvée dans 56% des cas et l’extension extra laryngée dans 59 % des cas. Une trachéotomie première pour dyspnée laryngée a été réalisée dans 44 % des cas. La laryngectomie était étendue au pharynx ou à la base de la langue dans 43 % des cas. Résultats : Les suites opératoires ont été marquées par l’apparition d'un  pharyngostome chez 19% des patients et par une infection dans 11% des cas. Les limites de résection ont été tumorales dans 14% des cas. Une radiothérapie postopératoire a été réalisée dans 92,5% des cas.Une rééducation orthophonique a pu être réalisée chez 36% des patients. Sur un recul moyen de 40 mois (2 à 132 mois), une récidive tumorale ou ganglionnaire a été retrouvée dans 8 % et 5 % des cas respectivement. Le taux de métastase à distance était de 11 % des cas. Une deuxième localisation a été objectivée dans 4 % des cas. La survie moyenne à 5 ans était de 75 %. Discussion : La laryngectomie totale est une intervention mutilante, par le handicap vocal qu’elle engendre mais la survie à 5 ans est de 75%. La perte définitive de la fonction phonatoire du larynx en constitue l’handicap majeur. Le diagnostic plus précoce de ces cancers dans notre pays peut permettre d’autres alternatives thérapeutiques.Mots-clés : Laryngectomie totale, pharyngostome, cancers laryngés