A simulation and modeling approach of coupled thermal and electrical behavior of PV panels using the artificial hummingbird algorithm and two-dimensional finite difference-based model.

Accurate estimation of photovoltaic (PV) panels' temperature is crucial for an accurate assessment for both the electrical and thermal aspects and performances. In this study we propose an advanced simulation approach linking a double-diode (DD) electrical model using the Artificial hummingbird algorithm; for parameter extraction; and a two-dimensional finite-difference-based thermal model. The electrical-sub model is firstly validated in comparison to experimental data figuring in literature using three types of PV technologies, with a relative error of about 2%.

Capillary hemangioma of the middle ear: one case report and review of the literature.

Hemangiomas are rare benign vascular tumors; there are several types including the capillary hemangiomas, we present the case of an exceptional localization of capillary hemangioma in the middle ear. We report the case of a 60-year-old female which consults for episodes of pulsatile tinnitus, otorragies, and hearing loss of the left ear. The clinical examination revealed a reddish polypoid mass in the left external auditory canal, the radiological tests showed a vascular mass in the middle left ear.

Retropharyngeal abscess in adults: five case reports and review of the literature.

Retropharyngeal abscesses are rare in adults. They occur mostly in immunocompromised patients or as a foreign body complication. We report 5 cases of retropharyngeal abscess collected in the ENT Department of CHU Mohammed VI of Marrakech, during a two-year period (December 2008 to December 2009).

[Hydatid cyst of the thyroid in a child].

Introduction: Hydatidosis is an anthropozoonosis due to the development of the Echinococcus granulosus in humans. Thyroid gland involvement is rather rare. The authors report a very rare case of thyroid gland hydatidosis in a child.