OBJECTIVES To evaluate the efficacy of thick acellular human dermis (thick AlloDerm [LifeCell Corporation, The Woodlands, Tex]) grafts for posterior and middle lamellae reconstruction to correct lower eyelid retraction and to compare the long-term efficacy of thick AlloDerm with thin AlloDerm and hard palate grafts. METHODS Retrospective analysis of patients undergoing lower eyelid reconstruc...

We propose and experimentally demonstrate a hierarchical modulation scheme to improve power margin for orthogonal frequency division multiple access-passive optical networks (OFDMA-PONs). In a PON system, under the same launched optical power, optical network units (ONUs) have different power margins due to unequal distribution fiber lengths. The power margin of the PON system is determined by ...

AIM Standardization of the technique to section the extratemporal facial nerve in rats and creation of a scale to evaluate facial movements in these animals before and after surgery. STUDY DESIGN Experimental. METHOD twenty Wistar rats were anesthetized with ketamine xylazine and submitted to sectioning of the facial nerve near its emergence through the mastoid foramen. Eye closure and blin...

BACKGROUND Ductal carcinoma in situ is a non-invasive carcinoma that is unlikely to recur if completely excised. Margin width, the distance between the boundary of the lesion and the edge of the excised specimen, may be an important determinant of local recurrence. METHODS Margin widths, determined by direct measurement or ocular micrometry, and standardized evaluation of the tumor for nuclea...

We present a formulation of deep learning that aims at producing a large margin classifier. The notion of margin, minimum distance to a decision boundary, has served as the foundation of several theoretically profound and empirically successful results for both classification and regression tasks. However, most large margin algorithms are applicable only to shallow models with a preset feature ...

Introduction All lateral spinal radiographs in idiopathic scoliosis (IS) show a Double Rib Contour Sign (DRCS) of the thoracic cage, a radiographic expression of the rib hump. The outline of the convex overlies the contour of the concave ribs. The rib index (RI) method was extracted from the DRCS to evaluate rib hump deformity in IS patients. The RI was calculated by the ratio of spine distance...

We propose a large margin method for asymmetric learning with ellipsoids, called eMIL, suited to multiple instance learning (MIL). We derive the distance between ellipsoids and the hyperplane, generalising the standard support vector machine. Negative bags in MIL contain only negative instances, and we treat them akin to uncertain observations in the robust optimisation framework. However, our ...

We study the relationship between Support Vector Machines (SVM) and Least Squares SVM (LS-SVM). Our main result shows that under mild conditions, LS-SVM for binaryclass classifications is equivalent to the hard margin SVM based on the well-known Mahalanobis distance measure. We further study the asymptotics of the hard margin SVM when the data dimensionality tends to infinity with a fixed sampl...

BACKGROUND Our aim was to investigate the ways in which surgeons who perform head and neck ablative procedures on a regular basis define margins, how they use frozen sections to evaluate margins, and the effect of chemoradiation on determining tumor margins. METHODS A custom-designed questionnaire was mailed to members of the American Head and Neck Society asking members how they evaluate and...