purpose: to report an extremely rare presentation of isolated orbital xanthogranuloma with no systemic disease, nor dermatologic manifestation. case report: the patient was a 45-year-old man complaining of a mass lesion in the superior and inferior eyelids of his right eye; the lesions had been enlarging slowly and painlessly since 5 years before. other examinations (including skin, heart, etc....

In the present study, we investigate the impact of stratospheric planetary wave reflection on tropospheric weather over Central Eurasia during the 2013 Sudden Stratospheric Warming (SSW) event. We analyze EP fluxes and Plumb wave activity fluxes to study the two and three dimensional aspects of wave propagation, respectively. The 2013 SSW event is excited by the combined influence of wavenumber...

Air-breathing electric propulsion (ABEP) enables long duration missions at very low orbital altitudes through the use of drag compensation. A system-level spacecraft model is developed, using interaction between thruster, intake and solar arrays, coupled to a calculation drag. quadratic solution found for specific impulse evaluated identify thruster performance required drag-compensation varyin...

Abstract In Low Earth Orbit (LEO), atmospheric drag is the largest contributor to trajectory prediction error. The current thermospheric density model used in operations, High Accuracy Satellite Drag Model (HASDM), applies corrections an empirical every 3 hr using observations of 75+ calibration satellites. This work aims improve global estimation by utilizing a physics‐based space environment ...

background: lemon verbena (lippia citriodora h.b.k.) is an aromatic and medicinal plant of family verbenaceae, which cultivated in the north region of iran. objective: this comparative study was carried out on essential oil content and composition of lippia citriodora h.b.k. from micro-propagated and rooted apical stem cutting plantlets. methods: the micro-propagated plantlets were obtained by ...

in vitro propagated and conventional runner propagated plantlets of strawberry (fragaria×ananassa duch) cv. ‘festival’ were transferred to the field and the size of crown for plants derived from both sources of planting material were compared. four sizes of the crown, i.e., < 0.5, 0.5-0.8, 0.8-1, and > 1 cm were taken from both sources of planting material. the results obtained flashed that veg...

purpose: to report a case of enophthalmos secondary to complete globe dislocation into the maxillary sinus due to orbital fracture. patient and findings: an 18-year-old man was referred to labafinejad hospital, one week after a car accident. at initial examination, the globe was not seen within the right orbit. a large floor fracture and globe luxation into the right maxillary sinus were confir...