The partial least squares (PLS) method computes a sequence of approximate solutions xk ∈ Kk(AA,A b), k = 1, 2, . . . , to the least squares problem minx ‖Ax− b‖2. If carried out to completion, the method always terminates with the pseudoinverse solution x† = A†b. Two direct PLS algorithms are analyzed. The first uses the Golub–Kahan Householder algorithm for reducing A to upper bidiagonal form....

background: fenestration in the modified fontan operation allows right-to-left shunting, which reduces the fontan pathway pressure and improves cardiac output. however, on account of the fact that persistent right-to-left shunting results in cyanosis and paradoxical emboli, fenestration closure is recommended after recovery from the fontan operation. methods: this study recruited 3 patients who...

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aim : the aim of this study was to comprehensively analyze histopathologic parameters of whipple pancreaticoduodenectomy specimens at taleghani general hospital pathology department. background : the whipple procedure is performed for variety of tumors involving the head of the pancreas, ampulla of vater, common bile duct, or duodenum. patients and methods : records of all cases of whipple panc...

conclusions most cases of splenectomy in our center caused by trauma, and among the different types of trauma, blunt trauma is the dominant cause. road traffic accidents, in particular motor vehicle accidents, especially motorbike injures, are the most frequent cause of splenectomy. due to the instability of trauma patients, a mortality rate of 8% seems to be reasonable for splenectomy. rnwe re...

thyroglossal duct cysts are the most common congenital anomalies in thyroid development, which in less than 1% of cases are malignant. in most cases the diagnosis is made postoperatively. up to now, a few cases have been reported which had been papillary carcinoma. controversies exist concerning its nature and treatment. we present a 30 years old woman with papillary carcinoma of thyroglossal d...

Pectus excavatum is a common thoracic deformity. The main surgical method in early years was Ravitch procedure. Due to the complexity of operation itself, it difficult ensure effect. We recently received 35-year-old male patient with When he 15 old, procedure local hospital for pectus excavatum. postoperative effect not satisfactory, and deformity became worse age. Recently, we performed anothe...