A reinjected cuspidal horseshoe October 10
نویسندگان
چکیده
Horseshoes play a central role in dynamical systems and are observed in many chaotic systems. However most points in a neighborhood of the horseshoe escape after finite iterations. In this work we construct a model that possesses an attracting set that contains a cuspidal horseshoe with positive entropy. This model is obtained by reinjecting the points that escape the horseshoe and can be realized in a 3-dimensional vector field.
منابع مشابه
A Reinjected Cuspidal Horseshoe
Horseshoes play a central role in dynamical systems and are observed in many chaotic systems. However most points in a neighborhood of the horseshoe escape after finite iterations. In this work we construct a model that possesses an attracting set that contains a cuspidal horseshoe with positive entropy. This model is obtained by reinjecting the points that escape the horseshoe and can be reali...
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Prom April, 1983 until December, 1987, 15 patients with horseshoe kidneys underwent surgery in Shahid Labbafi Nejad Medical Center. Pyelolithotomy was done in 11 cases, pyeloplasty in 2 cases, and nephrectomy in 2 cases. Symphysiotomy was performed in 14 of these patients. Preoperative angiography was not done in any of the cases and midline transperitoneal approach was utilized in all of ...
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Background and aim: Horseshoe placenta is a variant of ring-shaped placenta. Ring-shaped placenta is a rare anomaly seen in fewer than 1 in 6000 deliveries, which could be seen as horseshoe shape due to atrophy in a portion of the ring. This report refers to a possible relationship between the horseshoe shape placenta and preterm labor; although it has not been yet validated in the literature. ...
متن کامل[Surgical therapy of lithiasis in horseshoe kidney].
OBJECTIVE To present our centre's experience in the surgical treatment of lithiasis in patients with horseshoe kidney. MATERIAL AND METHODS From October 2007 to March 2011 we treated 10 patients with renal lithiasis in their horseshoe kidneys. Retrospectively, we reviewed the symptoms, medical and surgical history, the characteristics of the stones (size, location, composition) and treatments...
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تاریخ انتشار 2012