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The RDP algorithm uses a simple parity scheme based on EX-OR operations. Each data block belongs to one row-parity set and one diagonal parity set. In a simple RDP array, there are p + 1 disks. The stripes across the array consist of one block from each disk. In each stripe, one block holds diagonal parity, one block holds row parity, and p – 1 blocks hold(More)
OBJECT The authors analyzed the cases of 190 patients with basilar invagination that was diagnosed on the basis of criteria laid down in 1939 by Chamberlain to assess the appropriate surgical procedure. METHODS Depending on the association with Chiari malformation, the anomaly of basilar invagination was classified into two groups. Eighty-eight patients(More)
OBJECTIVE We review our experience with the use of the plate and screw method of fixation in the treatment of 160 patients with atlantoaxial instability during a 14-year period at our center. We previously described this method of fixation in 1994. METHODS Between 1988 and 2001, 160 patients with atlantoaxial instability were treated with the use of a(More)
OBJECTIVE The surgical strategies and outcomes for 70 patients operated on for tuberculum sellae meningioma were analyzed retrospectively. The analysis was based on factors that probably determined the difficulties encountered during surgery, assisted in predicting the extent of resectability, and helped in predicting the surgical outcome. METHODS Seventy(More)
OBJECTIVE We reviewed the clinical and radiological features of 73 cases of trigeminal neuromas treated with radical surgery. METHODS The records for 73 patients with trigeminal neuromas who were surgically treated in the neurosurgery department of King Edward VII Memorial Hospital and Seth Gordhandas Sunderdas Medical College (Mumbai, India), between(More)
Row-Diagonal Parity (RDP) is a new algorithm for protecting against double disk failures. It stores all data unencoded, and uses only exclusive-or operations to compute parity. RDP is provably optimal in computational complexity, both during construction and reconstruction. Like other algorithms, it is optimal in the amount of redundant information stored(More)
OBJECT The author discusses the successful preliminary experience of treating selected cases of basilar invagination by performing atlantoaxial joint distraction, reduction of the basilar invagination, and direct lateral mass atlantoaxial plate/screw fixation. METHODS Twenty-two patients with basilar invagination-in which the odontoid process invaginated(More)
OBJECTIVE We analyzed the data for a series of 14 patients with primary Ewing's sarcomas of the cranium who were treated since 1985. Our aim was to assess the long-term outcomes and the selection of appropriate treatment methods. METHODS The patients were reviewed with respect to their clinical presentations, treatment, and outcomes. Computed tomographic(More)
BACKGROUND Colloid cyst of the third ventricle is a relatively rare intracranial tumor. It generates tremendous interest for the neurosurgeon because of its benign nature, deep location, and an excellent prognosis when diagnosed early and excised. METHOD A retrospective analysis of 105 cases of third ventricle colloid cyst treated between 1967 to 1998 was(More)
BACKGROUND The aim of the study is to analyze the nature, extensions, and dural relationships of hormonally inactive giant pituitary tumors. The relevance of the anatomic relationships to surgery is analyzed. METHODS There were 118 cases of hormonally inactive pituitary tumors analyzed with the maximum dimension of more than 4 cm. These cases were(More)