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정정권,윤규호,전인성,김기엽,김현우,권순욱 大韓顎顔面成形再建外科學會 2002 Maxillofacial Plastic Reconstructive Surgery Vol.24 No.5
The ranula is a form of mucocele which specifically occurs in the floor of the mouth. The ranula is classfied into simple ranula and plunging ranula according to the mechanism of development such as the salivary duct obstruction or the extravasation. Clinically this lesion develops as a slowly enlarging painless, fluctuant mass on one side of the floor of the mouth and the mucosa may have a translucent bluish color. An 8-month-old male infant visited our hospital with the chief complaint of the left submandibular swelling and the mass on the floor of the mouth. We tentatively diagnosed a simple ranula. The marsupialization was performed but the sign and the symptom did not subside, so we took the MRI. By the MRI we diagnosed a plunging ranula and excised the sublingual gland via the intraoral approach. The correct diagnosis is essential for the most effective treatment, which is the excision of the sublingual gland.
Optimization for an Isoflux Pattern From a Multiring Microstrip Array via Least-Squares Regression
Jeong, Seong-Yeop,Lee, Teak-Kyung,Lee, Jae-Wook IEEE 2017 IEEE antennas and wireless propagation letters Vol.16 No.-
<P>This letter presents a novel optimization via the theoretical modeling of an array geometry for isoflux patterns from a satellite antenna. The array has a multiring geometry capable of realizing the source distribution and ring radii similar to a sinc function shape. Additionally, the array uses the sequential changing of the phase excitations in order to favor circular polarization. By means of the cavity model, a synthesized electric field from the array antenna is formulated. For the desired isoflux pattern, the formulated electric field is analytically optimized via the least-squares regression iteration process. The results of the optimization show the approximately uniform electric-field illumination on the ground from a satellite antenna.</P>