38 research outputs found

    Wheat Yield Vulnerability: Relation to Rainfall and Suggestions for Adaptation

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    Wheat production is of paramount importance in the region of Meknes, which is mainly produced under rainfed conditions. It is the dominant cereal, the greater proportion being the soft type. During the past few decades, rainfall flaws have caused a number of cases of droughts. These flaws have seriously affecting wheat production. The main objective of this study is the assessment of rainfall variability at monthly, seasonal and annual scales and to determine their impact on wheat yields. To reduce this impact we suggested some mechanisms of adaptation. We used monthly rainfall records for three decades and wheat yields records of fifteen years. Rainfall variability is assessed utilizing the precipitation concentration index and the variation coefficient. The association between wheat yields and cumulative rainfall amounts of different scales was calculated based on a regression model to evaluate the impact of rainfall on wheat yields. Data analysis shown moderate seasonal and irregular annual rainfall distribution. Yields fluctuated from 210 to 4500 Kg/ha with 52% of coefficient of variation. The correlation results shows that soft wheat and hard wheat are strongly correlated with the period of January to March than with the whole growing-season. While they are adversely correlated with the mid-spring. This investigation concluded that synchronizing appropriate adaptation with the period of January to March was crucial to achieving success yield of wheat

    The Role of Visual Perspective Taking in Human-Robot Collaboration

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    We present a video demonstration of our human-robot collaboration experiment investigating visual perspective taking and trust. In the experiment, participants interact with a Vector robot to help it navigate out of a maze. Both robot and participant have a unique view of the maze, with participants viewing it from above and Vector from a point-of-view perspective. The maze itself includes a series of junctions with several route options. After announcing the task objectives, the robot navigates autonomously and uses verbal utterances to communicate route options and route suggestions at each junction. Junction decisions are made after Vector announces the route options, listens to participants' selection, offers a route suggestion, and processes participants' final decision. So, to efficiently navigate to the mazes exit, participants' must assume Vector's visual perspective to understand the direction it is referring to. As outlined in the conclusion, this experiment intended to investigate the role of visual perspective taking on trust dynamics in collaborative human-robot interaction, with a view to supporting further work on robot theory of mind (ToM).</p

    Case Report - Abcès thyroïdien à Escherichia coli: à propos d’un cas et revue de la littérature

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    L&#8217;abc&#232;s de la thyro&#239;de est une entit&#233; pathologique extr&#234;mement rare, repr&#233;sentant seulement 0.1% des pathologies chirurgicales de la thyro&#239;de. C&#8217;est une situation inhabituelle en raison des caract&#233;ristiques anatomiques et physiologiques de la glande qui lui donne une capacit&#233; de r&#233;sistance vis-&#224;-vis des infections. Nous rapportons un cas rare d'abc&#232;s thyro&#239;dien &#224; Escherichia .coli survenu chez une patiente de 55 ans, immunod&#233;prim&#233;e: diab&#233;tique insulinod&#233;pendante non &#233;quilibr&#233;e, hypertendue mal suivie avec insuffisance cardiaque gauche, et en insuffisance r&#233;nale chronique terminale. La patiente s&#8217;est pr&#233;sent&#233;e aux urgences avec une tum&#233;faction basi-cervicale ant&#233;rieure &#233;voluant sur 10 jours, pr&#233;dominante &#224; droite, mesurant 6 cm, sensible, inflammatoire, mobile &#224; la d&#233;glutition, avec une dyspn&#233;e mixte, sueurs et fi&#232;vre. Un scanner cervico-thoracique mettait en &#233;vidence un &#233;norme processus du lobe thyro&#239;dien droit &#224; contenu liquidien de 9cm, refoulement des voies a&#233;riennes sup&#233;rieures. Une cytoponction &#224; l'aiguille ramenait 10 ml de liquide purulent. Le drainage chirurgical a &#233;t&#233; r&#233;alis&#233; sous anesth&#233;sie locale vue le risque d&#8217;intubation difficile devant le blindage cervical en pr&#233;sence d&#8217;une trach&#233;e difficilement accessible. Une E. coli &#233;tait isol&#233;e apr&#232;s la culture du liquide de drainage. La patiente &#233;tait porteuse d&#8217;un bricker depuis l&#8217;enfance pour malformation de la vessie. Ceci sugg&#232;re une bact&#233;ri&#233;mie &#224; point de d&#233;part urinaire, avec embole septique au niveau de la glande thyro&#239;de. L&#8217;&#233;volution &#233;tait bonne sous tri-antibioth&#233;rapie, et des pansements biquotidiens, avec &#233;quilibration de son diab&#232;te et insuffisance r&#233;nale chronique. Nous rappellerons &#224; travers cette observation les moyens de d&#233;fense de la thyro&#239;de contre les infections, les diff&#233;rents facteurs pr&#233;disposant &#224; l&#8217;abc&#232;s de la thyro&#239;de, et les germes incrimin&#233;s dans chaque &#233;tiologie. Nous discuterons les diagnostics diff&#233;rentiels et nous insisterons sur les modalit&#233;s diagnostiques et de prise en charge th&#233;rapeutique de ce type de malades
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