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Öğe Öğe Coverings and actions of structured Lie groupoids(Universitatii Al.I.Cuza din Iasi, 2016) Gursoy M.H.; Icen I.; Ozcan A.F.In this work we deal with coverings and actions of Lie group-groupoids and Lie ring-groupoids being two sorts of the structured Lie groupoids. After we give definition of a structured Lie groupoid, we prove some characterizations of structured Lie groupoids. Then, we present the concept of covering of a structured Lie groupoid. As first main result of this work, we show that the category LSCov(M) of the smooth coverings of Lie group M is equivalent to the category SLGCov(?1M) of the coverings of structured Lie groupoid ?1M, where it is assumed that ?1M is a Lie group-groupoid, specially. Furthermore, we define an action of a structured Lie groupoid on a connected Lie structure. Finally, we show that the category SLGCov(G) of the coverings of a structured Lie groupoid G and the category SLGOp(G) of the actions of G on Lie structures (group or ring) are equivalent. © 2016, Universitatii Al.I.Cuza din Iasi. All rights reserved.Öğe Intraoperative laparoscopy by a flexible scope: is it reliable in contralateral childhood hernias?(1997) Gursoy M.H.; Gurel M.; Koltuksuz U.; Uguralp S.; Aydinc M.BACKGROUND AND OBJECTIVES: Negative contralateral groin exploration for childhood hernias raises the question of whether contralateral groin exploration is necessary or not. To find out whether a contralateral processus vaginalis was patent, we performed laparoscopy with a flexible scope. METHODS: After carbon dioxide insufflation, a flexible laparoscope was inserted through the opened hernia sac and the contralateral processus vaginalis orifice was examined. We considered a patent processus vaginalis as a potential hernia. The study involved 20 children: 16 boys and 4 girls. The symptomatic side was explored in a conventional manner and laparoscopy was performed through the opened hernia sac. RESULTS: A contralateral processus vaginalis was found in 6 children: 4 boys and 2 girls. These results were confirmed by exploring the opposite groin. We did not explore if the laparoscopic examination was within normal limits. There was one false-positive result in a female patient. CONCLUSIONS: Intraoperative non-puncture laparoscopy utilizing a flexible laparoscope through the hernia opening is an uncomplicated, reliable and precise method for identifying a patent contralateral processus vaginalis. It may represent a satisfactory alternative to routine bilateral inguinal exploration. Also, use of the flexible laparoscope may be more beneficial than use of a rigid laparoscope passed through the umbilicus or hernia sac.
