منابع مشابه
Perpendicular Dissections of Space
For each pair (Qi, Qj) of reference points and each real number r there is a unique hyperplane h ⊥ QiQj such that d(P,Qi)2 − d(P,Qj)2 = r for points P in h. Take n reference points in d-space and for each pair (Qi, Qj) a finite set of real numbers. The corresponding perpendiculars form an arrangement of hyperplanes. We explore the structure of the semilattice of intersections of the hyperplanes...
متن کاملPathogenesis of cervical artery dissections
the question of assessment criteria. In: Battistini N, Fiorini P, Courbier R, et al., eds. Acute brain ischemia: medical and surgical therapy. New York: Raven Press, 1986:201–208. 38. Edwards DF, Chen YW, Diringer MN. Unified Neurological Stroke Scale is valid in ischemic and hemorrhagic stroke. Stroke 1995;26:1852–1858. 39. Woods RP, Mazziotta JC, Cherry SR. MRI-PET registration with automated...
متن کاملTreatment of a Mandibular Fracture by Two Perpendicular Mini-Plates
Introduction: In open reduction and internal fixation for the treatment of mandibular fracture, the fixation technique used is very important in reducing post-operative complications and promoting the healing process. This study assessed the results of fixation of the mandible using two mini-plates perpendicular to each other in the lower border of the mandible for fracture treatment. Materi...
متن کاملCervicocerebral artery dissections.
OBJECTIVE To determine the aetiology, frequency, presentation, and outcome of blunt cervicocerebral arterial dissection presentations. PATIENTS AND METHODS Cases were retrospectively identified through the stroke registers at Royal Melbourne Hospital (a tertiary teaching hospital) and Geelong Hospital (a regional referral centre). Medical notes were then reviewed. RESULTS A total of 18 case...
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ژورنال
عنوان ژورنال: Discrete & Computational Geometry
سال: 2002
ISSN: 0179-5376,1432-0444
DOI: 10.1007/s00454-001-0073-4