33 research outputs found

    Globalization, Fragmentation and Intra-Firm trade

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    What are the theoretical determinants of intra-firm trade between identical countries? This paper focuses on firm and sectorial characteristics to state that this pattern of trade can be associated to low level of intermediate goods trade costs compared with those on final goods and markups imposed by upstream local producers, and multinational firms' technological structure such that scale economies are at the firm-level for downstream sector and plant-level for upstream one.

    Les carcinomes adénoïdes kystiques de la parotide a propos de 3 cas

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    Les carcinomes adĂ©noĂŻdes kystiques (CAK) reprĂ©sentent 2 Ă  4% des tumeurs de la parotide et 12% des tumeurs malignes. Ce sont des tumeurs Ă  croissance lente qui sont caractĂ©risĂ©es par leur capacitĂ© Ă  infiltrer les gaines nerveuses. Les auteurs rapportent trois cas de CAK de la glande parotide diagnostiquĂ©s et traitĂ©s entre l’annĂ©e 2000 et 2007. Il s’agissait de 2 hommes et une femme qui ont consultĂ© devant l’apparition d’une tumĂ©faction de la loge parotidienne associĂ©e Ă  une paralysie faciale dans un cas. Les aires ganglionnaires Ă©taient libres. Tous les patients ont bĂ©nĂ©ficiĂ© d’une exploration comportant une Ă©chographie, une TDM dans un cas et une IRM chez un patient. Le traitement a consistĂ© en une parotidectomie totale associĂ©e Ă  un curage ganglionnaire dans tous les cas et Ă  une radiothĂ©rapie complĂ©mentaire. L’évolution a Ă©tĂ© favorable dans deux cas. Le carcinome adĂ©noĂŻde kystique de la parotide est une tumeur rare, caractĂ©risĂ©e par une Ă©volution trĂšs lente, une agressivitĂ© locale, un caractĂšre fortement rĂ©cidivant localement et un haut pouvoir mĂ©tastatique Ă  distance.Mots-clĂ©s : Carcinome adĂ©noĂŻde kystique, glande parotide, chirurgie, radiothĂ©rapie

    L\'amylose LaryngĂ©e À Propos D\'un Cas

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    L\'amylose localisĂ©e est caractĂ©risĂ©e par un dĂ©pĂŽt de protĂ©ines fibrillaires dans un site de l\'organisme sans atteinte systĂ©mique. La localisation laryngĂ©e est trĂšs rare. Ce diagnostic doit ĂȘtre Ă©voquĂ© devant toute lĂ©sion d\'allure bĂ©nigne du larynx. Les auteurs rapportent un cas d\'amylose laryngĂ©e colligĂ© sur une pĂ©riode de 10 ans.Localized amyloidosis is characterized by the deposition of amyloid fibres in a particular site or organ system in the absence of systemic involvement. The laryngeal location of amylosis is rare. The diagnosis must be suspected in front of any tumor of benign speed of the larynx. Authors report a case of laryngeal amyloidosis brought during a period of 10 years. Journal Tunisien d\'ORL et de chirurgie cervico-faciale Vol. 16 2006: pp. 30-3

    Le Carcinome Mucoépidermoïde De La Parotide : Apropos De 5 Cas

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    Les tumeurs des glandes salivaires reprĂ©sentent moins de 5% de toutes les tumeurs de la tĂȘte et du cou. Parmi eux, le carcinome mucoĂ©pidermoĂŻde est la tumeur la plus frĂ©quente. Quarante cinq pour cent des carcinomes mucoĂ©pidermoĂŻdes se dĂ©veloppent au niveau de la glande parotide. Cette lĂ©sion se voit surtout chez l\'adulte vers la 5Ăšme dĂ©cade. Le diagnostic est confirmĂ© seulement Ă  l\'examen anatomopathologique. Son pronostic est fonction des critĂšres histologiques.Salivary gland tumors account for less than 5% of the head and neck neoplasms. Among them, mucoepidermoid carcinoma is the most common malignant salivary gland tumor. About 45% of mucoepidermoid carcinomas occur in the parotid gland, and appear around the fifth decade of life. A certain diagnostic can be obtained only after post-operative histological examination. Histological examination indicates the patient prognosis. Journal Tunisien d\'ORL et de chirurgie cervico-faciale Vol. 16 2006: pp. 39-4

    Spindle cell oncocytoma of the adenohypophysis in a woman: a case report and review of the literature

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    <p>Abstract</p> <p>Introduction</p> <p>Spindle cell oncocytoma of the adenohypophysis is a rare tumour recently reported by Roncaroli <it>et al. </it>in 2002. This tumour is considered a grade I tumour by the World Health Organization.</p> <p>Case presentation</p> <p>We describe what is, to the best of our knowledge, the 14th case of its kind in the literature. A 45-year-old African woman presented clinical and radiological findings related to a nonfunctioning pituitary adenoma. The diagnosis was made on the basis of histological and immunohistochemical findings.</p> <p>Conclusion</p> <p>The purpose of this work is to report a rare pituitary tumour and to describe its histological and immunohistochemical features, which were characterized by the expression of thyroid transcription factor 1 antigen by tumour cells. This fact could support the theory of a possible common origin of these tumours in pituicytomas. In fact, thyroid transcription factor 1 is considered to be a specific marker of pituicytes.</p

    The Global Burden of Alveolar Echinococcosis

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    Human alveolar echinococcosis (AE), caused by the larval stage of the fox tapeworm Echinococcus multilocularis, is amongst the world's most dangerous zoonoses. Transmission to humans is by consumption of parasite eggs which are excreted in the faeces of the definitive hosts: foxes and, increasingly, dogs. Transmission can be through contact with the definitive host or indirectly through contamination of food or possibly water with parasite eggs. We made an intensive search of English, Russian, Chinese and other language databases. We targeted data which could give country specific incidence or prevalence of disease and searched for data from every country we believed to be endemic for AE. We also used data from other sources (often unpublished). From this information we were able to make an estimate of the annual global incidence of disease and disease burden using standard techniques for calculation of DALYs. Our studies suggest that AE results in a median of 18,235 cases globally with a burden of 666,433 DALYs per annum. This is the first estimate of the global burden of AE both in terms of global incidence and DALYs and demonstrates the burden of AE is comparable to several diseases in the neglected tropical disease cluster

    Accounting for vegetation height and wind direction to correct eddy covariance measurements of energy fluxes over hilly crop fields

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    As agricultural hilly watersheds are widespread throughout the world, there is a strong need for reliable estimates of land surface fluxes, especially evapotranspiration, over crop fields on hilly slopes. In order to obtain reliable estimates from eddy covariance (EC) measurements in such conditions, the current study aimed at proposing adequate planar fit tilt corrections that account for the combined effects of topography, wind direction, and vegetation height on airflow inclinations. EC measurements were collected within an agricultural hilly watershed in northeastern Tunisia, throughout the growth cycles of cereals, legumes, and pasture. The wind had two dominant directions that induced upslope and downslope winds. For upslope winds, the airflows were parallel to the slopes and slightly came closer to the horizontal plane when vegetation grew. For downslope winds, over fields located in the lee of the rim top, the airflows were almost horizontal over bare soil and came closer to the topographical slope when vegetation grew. We therefore adjusted the planar fit tilt correction on EC measurements according to vegetation height and by discriminating between upslope and downslope winds. This adjusted tilt correction improved the energy balance closure in most cases, and the obtained energy balance closures were similar to that reported in the literature for flat conditions. We conclude that EC data collected within crop fields on hilly slopes can be used for monitoring land surface fluxes, provided planar fit tilt corrections are applied in an appropriate manner

    Quantification de l'évapotranspiration réelle à l'échelle d'un bassin versant agropastoral du semi-aride

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    Dans la rĂ©gion mĂ©diterranĂ©enne, la connaissance des besoins en eau des cultures est primordiale, pour une gestion rationnelle des ressources en eau. L&#8217;Ă©vapotranspiration rĂ©elle (ETR) peut ĂȘtre estimĂ©e par plusieurs mĂ©thodes de mesures ou de modĂ©lisation. La mĂ©thode des covariances turbulentes (EC) a l&#8217;avantage de permettre la mesure directe mĂȘme si des difficultĂ©s d&#8217;ordre mĂ©thodologiques sont rencontrĂ©es dans les milieux hĂ©tĂ©rogĂšnes et collinaires. Dans l&#8217;objectif d&#8217;Ă©valuer la variabilitĂ© de fonctionnement de la vĂ©gĂ©tation d&#8217;un bassin versant durant une saison, des chroniques d&#8217;ETR mesurĂ©es pour diffĂ©rentes occupations de sol sont comparĂ©es. Le bassin versant "Kamech" site de l&#8217;ORE OMERE en Tunisie, caractĂ©risĂ© par un milieu hĂ©tĂ©rogĂšne, a Ă©tĂ© choisi pour mettre en place des expĂ©rimentations de suivie de l&#8217;ETR depuis 2004. Des mesures atmosphĂ©riques, les diffĂ©rents termes du bilan d&#8217;Ă©nergie ont Ă©tĂ© rĂ©alisĂ©es, les flux turbulents sont mesurĂ©s par EC. L&#8217;expĂ©rimentation a permis d&#8217;Ă©valuer la technique de mesure dans les conditions de relief et la mĂ©thodologie de reconstitution des flux Ă  l&#8217;Ă©chelle d&#8217;une saison Ă  partir de mesures discontinues dans le temps. Les comparaisons des chroniques d&#8217;ETR de cĂ©rĂ©ales, de lĂ©gumineuses et de parcours ont montrĂ© la dynamique des Ă©changes surface-atmosphĂšre d&#8217;un bassin versant collinaire du semi arid
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