95 research outputs found
Racism and Gender in James Baldwinâs Selected Essays
Racism and gender oppression are one of the major issues in Black America. This article attempts to examine these two themes in three essays by the African American writer James Baldwin; namely No Body Knows My Name: A Letter From the South, Faulkner and desegregation and On Catfish Row âPorgy and Bessâ in the Movies
Cystadénocarcinome de la base de la langue
Introduction: Les cancers de la base de langue sont des tumeurs agressives et silencieuses. Le cystadĂ©nocarcinome est une tumeur maligne du tissu glandulaire ayant une composante kystique intĂ©ressant principalement les glandes salivaires accessoires.Observation: Nous rapportons le cas dâun patient ĂągĂ© de 78 ans, qui a consultĂ© pour une dysphagie haute aux solides Ă©voluant depuis 2 ans, sans notion de dyspnĂ©e ni de dysphonie. Une formation kystique de la base de la langue a Ă©tĂ© mise en Ă©vidence. on a complĂ©tĂ© par un examen tomodensitomĂ©trique et une iRm qui ont montrĂ© une formation bienlimitĂ©e mesurant 3 cm aux dĂ©pens de la base de la langue, latĂ©ralisĂ©e Ă droite et comblant partiellement la vallĂ©cule droite. Le patient a Ă©tĂ© opĂ©rĂ© par voie cervicale infra mandibulaire avec exĂ©rĂšse chirurgicale en monobloc et lâexamen anatomopathologique a conclut Ă un cystadĂ©nocarcinome lingual. Un curage fonctionnel bilatĂ©ral a Ă©tĂ© pratiquĂ© complĂ©tĂ© ensuite par une radiothĂ©rapie.Conclusion: Le cystadĂ©nocarcinome de la base de la langue est une entitĂ© trĂšs rare. La symptomatologie clinique est pauvre. Les mĂ©tastases ganglionnaires sont frĂ©quentes. La tomodensitomĂ©trie et lâimagerie par rĂ©sonance magnĂ©tique sont nĂ©cessaires pour approcher la nature et lâextension de la tumeur. Le traitement est chirurgical et peut ĂȘtre suivi dâune radiothĂ©rapie.Mots Cles: cystadenocarcinome, base de langue, chirurgi
Otospongiose : a propos de 149 cas
Introduction : Lâotospongiose est une ostĂ©odystrophie de la capsule otique se traduisant par une surditĂ© de transmission ou plus rarement une surditĂ© mixte dâapparition progressive. Le but de notre travail est dâanalyser les caractĂ©ristiques épidĂ©miologiques, cliniques, paracliniques et comparer les rĂ©sultats en fonction de lâĂąge, du stade de lâostĂ©odystrophie, de la technique chirurgicale et de la prothĂšse.Patients et mĂ©thodes : notre Ă©tude est rĂ©trospective portant sur 124 patients (149 oreilles) colligĂ©s sur une pĂ©riode de 9 ans (2000-2008).RĂ©sultats : notre population a comportĂ© 86 femmes et 38 hommes. La moyenne dâĂąge Ă lâintervention Ă©tait de 39,82 ans. La surditĂ© Ă©tait bilatĂ©rale dans 61,3% des cas et unilatĂ©rale dans 38,3%. Les seuils moyens prĂ©opĂ©ratoires de la conduction osseuse et aĂ©rienne Ă©taient respectivement de 17,33 dB et 52,52 dB, le rinne moyen Ă©tait de 35,19 dB. La tomodensitomĂ©trie a Ă©tĂ© rĂ©alisĂ©e chez 63 patients. On a rĂ©alisĂ© 21 platinectomie totale, 24 platinectomie partielle et 101 platinotomie calibrĂ©e. Selon la classification de Portmann, on a trouvĂ© une rĂ©partition sensiblement Ă©gale entre les stades II, III et IV. On a utilisĂ© un piston tĂ©flon 6/10 mm dans 119 cas et 4/10 mm dans 27 cas. Le rinne moyen postopĂ©ratoire était de 15,95 dB. a 1 an, le rinne Ă©tait de 14,81 dB avec un rĂ©sultat satisfaisant de 94,2%.Conclusion : Il ressort de notre travail que certains facteurs semblent prĂ©dictifs de bons rĂ©sultats et qui sont : le sexe fĂ©minin, lâĂąge <50 ans, le stade chirurgical< stade IV, la platinotomie, et le piston 0,4 mm.Mots clĂ©s : otospongiose, conduction osseuse, conduction aĂ©rienne, platinotomie, platinectomie.Objective : Otosclerosis is a common disorder of the otic capsule characterized by the presence of a progressive conductive or rarely mixed hearing loss. The aims of this study were to analyses the epidemiologic, clinical, paraclinical characteristic and compare our results according to age, stage, surgical technique and prosthesis. Patients et mĂ©thodes : Our study is retrospective about 124 patients (149 ears) in the period of 9 years (2000-2008).Results: Our population included 86 female and 38 male patients. mean age at intervention time was 39,82 years. The hearing loss was bilateral in 61,3% of cases and unilateral in 38,3%. The bone and air conduction threshold was 17.33 dB and 52,52 dB, the air-bone gap was 35,19 dB. The CT scan was realized in 63 patients. We have realized 21stapedectomy, 24 partial stapedectomy and 101 stapedotomy. In accordance with Portmann classification, the distribution between II, III and IV stages was almost equal. We used 6/10 mm Teflon piston prosthesis in 119 cases and 4/10 mm in 27 cases. The postoperative air-bone gap was 15,95 dB. after 1 year, the air-bone gap was 14,81 dB with a satisfying results in 94,2%.Conclusion: it seems that some factors are predictive for good results like a female sex, age<50 years, stage< stage IV, platinotomy and piston 4/10 mm.Keyswords : otosclerosis, bone conduction, air conduction, stapedectomy, stapedotom
Mechanical Properties Comparison of Four Models, Failure Theories Study and Estimation of Thermal Expansion Coefficients for Artificial E-glass Polyester Composite
In this paper, the mechanical properties of artificial E-glass reinforced polyester composite were evaluated; the elastic properties and the strength of the composite were measured experimentally by tensile tests and then compared with the predicted values by theoretical four micromechanical constitutive models. The strength of the composite lamina and laminates were also determined experimentally and compared with five widely used theoretical failure theories. The lamination theory was also used to determine the strength of laminates by applying Hill- Tsai failure criterion. The theoretical models showed that the composite stiffness increases with increasing the fibre volume fraction and the volume fraction which gave the best fit to the experimental results of elastic modulus (E1) corresponds to volume fraction (Vf) equal 0.37. The stiffness of a unidirectional lamina depends on the fiber orientation relative to the off-axis load direction, and it drops sharply as the fiber alignment angle increases. In addition, the prediction of thermal expansion coefficients of composite is carried out in the present analysis, whereas the values of the coefficient that estimated to be based on the mechanical properties of the certain composite theoretically and experimentally
NEW VIDEO COMPRESSION USING MSPIHT3D
ABSTRACTIn this paper, we propose a new approach to video compression based on the principle of Set Partitioning In Hierarchical Treealgorithm (SPIHT). Our approach, the modified SPIHT3D (MSPIHT3D), distributes entropy differently than SPIHT3D andalso optimizes the coding. This approach can produce results that are a significant improvement on the Peak Signal-to-NoiseRatio (PSNR) and compression ratio obtained by SPIHT3D algorithm, without affecting the computing time.KEYWORDS: video compression,, MSPIHT3D, arithmetic Coding, PSNR, Compression ratio
Les osteomes des sinus de la face
Introduction : Le but de notre travail est prĂ©ciser le profil Ă©pidĂ©mio-clinique de cette pathologie, lâapport de lâimagerie dans le diagnostic, et discuter les modalitĂ©s de lâexĂ©rĂšse chirurgicale et lâapport de la voie endoscopique.Patients et mĂ©thode : il sâagit dâune Ă©tude rĂ©trospective de 18 patients porteurs dâostĂ©omes des sinus paranasaux opĂ©rĂ©s entre 1993 Ă 2010. Ont Ă©tĂ© exclus les patients non opĂ©rĂ©s et les malades perdus de vue.RĂ©sultats : il sâagit de 18 patients porteurs dâun ostĂ©ome symptomatique des sinus de la face, dâĂąge moyen 40 ans, sex ratio 0,38. La localisation la plus frĂ©quente Ă©tait le sinus frontal dans 55.5% des cas. Le traitement chirurgical Ă©tait de mise pour les patients symptomatiques. La voie endonasale Ă©tait indiquĂ©e dans 6 cas.la rĂ©cidive a intĂ©ressĂ© deux patients (11%) ayant un ostĂ©ome frontal et fronto-ethmoĂŻdal. Pour le reste des malades lâĂ©volution Ă©tait favorable avec un recul moyen de 36 mois.Conclusion : LâostĂ©ome des sinus paranasaux reste longtemps asymptomatique mais peut se compliquer par extension orbitaire ou cĂ©rĂ©brale. Lâabord endonasal a permis dâamĂ©liorer la prise en charge.Mots clĂ©s : OstĂ©ome, sinus de la face, tomodensitomĂ©trie, chirurgie, voie endonasaleObjective : Lymph node infection is the most frequent localization of extrapulmonary tuberculosis. The treatment does not make general agreement. The aim of this study is to specify, from a review of the literature, the different ways of antimicrobial treatment and the indications of surgery.Patients and methods : il is about a retrospective study including 18 patients with paranasal sinus osteomas operated between 1993 and 2010. Were excluded unoperated and lost patients.Results : in this group of 18 patients with symptomatic sinus osteoma of the face, the mean age was 40 years, sex ratio was 0.38. the frontal sinus was the most affected, 55.5% of cases. Surgical treatment was set for symptomatic patients. The endonasal route was indicated in 6 cases. Recurrence was observed in two patients (11%) having a frontal osteoma and fronto-ethmoid. Outcomes were favorable in the remaining patients, mean follow-up was 36 months.Conclusion: Paranasal sinuses osteoma is a long asymptomatic tumor, but it may be complicated with orbital extending or stroke. Endonasal approach contributed to improve the treatment.Keyswords : Osteoma, paranasal sinus, computed tomography, surgery, endonasal approac
A Family of Plasmodesmal Proteins with Receptor-Like Properties for Plant Viral Movement Proteins
Plasmodesmata (PD) are essential but poorly understood structures in plant cell walls that provide symplastic continuity and intercellular communication pathways between adjacent cells and thus play fundamental roles in development and pathogenesis. Viruses encode movement proteins (MPs) that modify these tightly regulated pores to facilitate their spread from cell to cell. The most striking of these modifications is observed for groups of viruses whose MPs form tubules that assemble in PDs and through which virions are transported to neighbouring cells. The nature of the molecular interactions between viral MPs and PD components and their role in viral movement has remained essentially unknown. Here, we show that the family of PD-located proteins (PDLPs) promotes the movement of viruses that use tubule-guided movement by interacting redundantly with tubule-forming MPs within PDs. Genetic disruption of this interaction leads to reduced tubule formation, delayed infection and attenuated symptoms. Our results implicate PDLPs as PD proteins with receptor-like properties involved the assembly of viral MPs into tubules to promote viral movement
Editorsâ Introduction: An Overview of the Educational Administration and Leadership Curriculum: Traditions of Islamic Educational Administration and Leadership in Higher Education
This chapter provides an overview of several topics relevant to constructing an approach to teaching educational administration and leadership in Muslim countries. First, it places the topic in the context of the changing nature and critiques of the field that argue for a greater internationalisation to both resist some of the negative aspects of globalisation and to represent countriesâ traditions in the professional curriculum. Then, it identifies literature that presents the underlying principles and values of Islamic education that guide curriculum and pedagogy and shape its administration and leadership including the Qurâan and Sunnah and the classical educational literature which focuses on aims, values and goals of education as well as character development upon which a âgoodâ society is built. This is followed by a section on the Islamic administration and leadership traditions that are relevant to education, including the values of educational organisations and how they should be administered, identifying literature on the distinctive Islamic traditions of leadership and administrator education and training as it applies to education from the establishment of Islam and early classical scholars and senior administrators in the medieval period who laid a strong foundation for a highly sophisticated preparation and practice of administration in philosophical writings and the Mirrors of Princes writings, and subsequent authors who have built upon it up to the contemporary period. The final section provides an overview of the chapters in this collection
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