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A Ground Penetrating Radar and Electrical Resistivity Tomography Prospection for Detecting Sterile Bodies in the Phosphatic Bearing of Sidi Chennane(Morocco)

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International Journal of Geosciences 2011年第4期2卷 406-413页

作者： Nora El Assel Azzouz Kchikach Teresa Teixido Jose Antonio Pena Mohammed Jaffal roger guerin Pascale Lutz Es-Said Jourani Mbarek Amaghzaz Equipe de Recherche E2G Universite Cadi AyyadMarrakechMorocco Laboratorio de Geofisica Aplicada Instituto Andaluz de GeofisicaUniversidad de GranadaSpain Universite Pierre et Marie Curie-Paris UMR 7619 SisypheParisFrance Institut Polytechnique LaSalle Beauvais Department GeosciencesBeauvaiFrance Groupe Office Cherifien des Phosphates(OCP) KhouribgaMorocco

In Sidi Chennane deposits (Morocco), the phosphatic series is composed of regular interbedded phosphatic and marly limestone layers. Exploitation of the phosphate in these deposits collides frequently with problems bound to the existence, in this series, of sterile bodies qualified as derangements. They cause two kinds of problems: 1) as they are hard, compact and masked by a Quaternary cover, they disturb the exploitation in some yards and give bad reserve calculation;2) even the use of wells and mechanical boreholes did not evidence their delimitation. Our study shows that these bodies can be detected and delimited using ground penetrating radar and electrical resistivity tomography methods. It is based on the acquisition and the interpretation of series tests using these methods carried out above visible sterile bodies in a trench of exploitation in order to have geologically valid information. The article concerns to the analysis of the results and of the proceeding for a possible large geophysics survey.

关键词： Phosphatic Series Sterile Bodies Geophysical Prospecting GPR and ERT Methods

Functions of nuclear factor Y in nervous system development,function and health

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Neural Regeneration Research 2025年第10期20卷 2887-2894页

作者： Pedro Moreira roger Pocock Development and Stem Cells Program Monash Biomedicine Discovery Institute and Department of Anatomy and Developmental BiologyMonash UniversityMelbourneVICAustralia

Nuclear factor Y is a ubiquitous heterotrimeric transcription factor complex conserved across eukaryotes that binds to CCAAT boxes,one of the most common motifs found in gene promoters and *** the last 30 years,research has revealed that the nuclear factor Y complex controls many aspects of brain development,including differentiation,axon guidance,homeostasis,disease,and most recently ***,a complete understanding of transcriptional regulatory networks,including how the nuclear factor Y complex binds to specific CCAAT boxes to perform its function remains *** this review,we explore the nuclear factor Y complex’s role and mode of action during brain development,as well as how genomic technologies may expand understanding of this key regulator of gene expression.

关键词： axon guidance CCAAT boxes neuronal degeneration neuronal differentiation neuronal regeneration nuclear factor Y complex transcription factor transcriptional regulation

Long-Time Turbulence Model Deduced from the Navier-Stokes Equations

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Chinese Annals of Mathematics,Series B 2015年第5期36卷 883-894页

作者： roger LEWANDOWSKI IRMAR and Fluminance Team University of Rennes 1 and INRIA Campus Beaulieu

The author shows the existence of long-time averages to turbulent solutions of the Navier-Stokes equations and determines the equations satisfied by them, involving a Reynolds stress that is shown to be dissipative.

关键词： Navier-Stokes equations Weak solutions Turbulence modeling Reynolds stress

Clinical Factors Associated with Hepatocellular Iron Deposition in End-stage Liver Disease

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Journal of Clinical and Translational Hepatology 2020年第3期8卷 231-239页

作者： Amelia Fierro-Fine Leana guerin Hasan Hicsasmaz Kyle E.Brown Department of Pathology University of Iowa Roy J.and Lucille A.Carver College of MedicineIowa CityIAUSA ObjectRelational LLP Iowa CityIAUSA Division of Gastroenterology-Hepatology University of Iowa Roy J.and Lucille A.Carver College of MedicineIowa CityIAUSA Program in Free Radical and Radiation Biology University of Iowa Roy J.and Lucille A.Carver College of MedicineIowa CityIAUSA Iowa City Veterans Administration Medical Center Iowa CityIAUSA

Background and Aims: Hepatocellular iron accumulation in patients with chronic liver disease has been linked to adverse outcomes. The objective of this study was to identify clinical factors associated with hemosiderosis. Methods: A total of 103 consecutive liver transplant recipients were identified, in whom liver biopsy had been performed prior to transplantation. Laboratory and clinical data at biopsy and transplant were abstracted from the medical records and hepatocyte iron was graded in the biopsy and explant. The association of change in iron score from biopsy to transplant, with the time interval between these two events, was examined using linear mixed model analysis for repeated measures. Results: Most subjects had advanced fibrosis (F3-F4) at liver biopsy, which was performed on average about 2.5 years before transplant. Over 80% of patients had no or 1+ hepatocyte iron at biopsy;iron increased between biopsy and transplant in about 40%. The only demographic or clinical feature that correlated with increased iron was the presence of a transjugular intrahepatic portosystemic shunt. Increased iron at transplant was associated with higher serum iron and transferrin saturation at biopsy, and with lower hemoglobin level, greater mean corpuscular volume, mean corpuscular hemoglobin and mean corpuscular hemoglobin concentration, higher ferritin and model for end-stage liver disease score at ***: The development of hemosiderosis in end-stage liver disease is associated with lower hemoglobin levels and alterations in red blood cell indices that are suggestive of hemolysis. These observations suggest that extravascular hemolysis may play a role in the development of secondary iron overload.

关键词： Erythrocyte indices End-stage liver disease Hemolysis Hemosiderosis Humans Iron

A Relative Theory for Leibniz n-Algebras

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Algebra Colloquium 2016年第2期23卷 219-226页

作者： Guy roger Biyogmam Department of Mathematics Southwestern Oklahoma State University 100 Campus Drive Weatherford OK 73096 USA

In this paper we show that for an n-Filippov algebra g, the tensor power g ^n-1 is endowed with a structure of anti-symmetric co-representation over the Leibniz algebra g ^n-1. This co-representation is used to define some relative theories for Leibniz n-algebras with n 〉 2 and obtain exact sequences relating them. As a result, we construct a spectral sequence for the Leibniz homology of Filippov algebras.

关键词： Leibniz n-algebras Filippov algebras Leibniz homology

Correction of disturbed pathophysiology of hepatic failure by albumin dialysis

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Hepatobiliary & Pancreatic Diseases International 2008年第1期7卷 19-24页

作者： roger Williams Institute of Hepatology University College London Medical School 69-75 Chenies MewsLondonWC1E 6HXUK

Introduction In my presentation to the 4th International Symposium on Hepatic Failure and Artificial Liver Support in Chongqing on which this paper is based, I was specifically asked to address the question of whether albumin dialysis, as in the Molecular Adsorbents Recirculating System (MARS) did correct known abnormalities of the disturbed pathophysiology in liver failure. Before doing this

关键词： albumin dialysis

Archaeal viruses-novel,diverse and enigmatic

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Science China(Life Sciences) 2012年第5期55卷 422-433页

作者： GARRETT roger A Archaea Centre Department of BiologyCopenhagen UniversityOle Maal esVej 5DK2200 Copenhagen NDenmark

Recent research has revealed a remarkable diversity of viruses in archaeal-rich environments where spindles, spheres, fila- ments and rods are common, together with other exceptional morphotypes never recorded previously. Moreover, their dou- ble-stranded DNA genomes carry very few genes exhibiting homology to those of bacterial and eukaryal viruses. Studies on viral life cycles are still at a preliminary stage but important insights are being gained especially from microarray analyses of viral transcripts for a few model virus-host systems. Recently, evidence has been presented for some exceptional archaeal- nspecific mechanisms for extra-cellular morphological development of virions and for their cellular extrusion. Here we sum- marise some of the recent developments in this rapidly developing and exciting research area.

关键词： virus morphotypes diversity and evolution life cycle temporal regulation cellular extrusion mechanism

SOME REMARKS ON HYDROFOIL CAVITATION

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Journal of Hydrodynamics 2012年第3期24卷 305-314页

作者： ARNDT roger E. A. Saint Anthony Falls Laboratory University of Minnesota MinneapolisMN 55414 USA

This paper reviews numerical and experimental investigations of sheet/cloud cavitation carried out at the St. Anthony Falls Laboratory and at two collaborating facilities （Versuchsanstalt Ftir Wasserbau, Obernach, Germany and Osaka University, Japan） for more than a decade. Although significant advances have been made in the analysis of this flow several issues are still unresolved. The purpose of this paper is to examine the overall features of the problem, review the progress made to date and suggest avenues for new investigation.

关键词： cavitation hydrofoil numerical simulations

Multi-agent Control of High Redundancy Actuation

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International Journal of Automation and computing 2014年第1期11卷 1-9页

作者： Jessica Davies roger Dixon roger M.Goodall Thomas Stefen Lancaster Environment Centre Lancaster University School of Electrical Electronic & Systems EngineeringLoughborough University Department of Aeronautical and Automotive Engineering Loughborough University

The high redundancy actuator(HRA)concept is a novel approach to fault tolerant actuation that uses a high number of small actuation elements,assembled in series and parallel in order to form a single actuator which has intrinsic fault *** this structure afords resilience under passive control methods alone,active control approaches are likely to provide higher levels of performance.A multiple-model control scheme for an HRA applied through the framework of multi-agent control is presented *** application of this approach to a 10×10 HRA is discussed and consideration of reconfguration delays and fault detection errors are *** example shows that multi-agent control can provide tangible performance improvements and increase fault tolerance in comparison to a passive fault tolerant *** delays are shown to be tolerable,and a strategy for handling false fault detections is detailed.

关键词： Fault tolerance actuators intelligent control redundancy intelligent actuators cooperative systems