The aim of the study is to evaluate the efficacy of a spinal osteotomy technique, Y shape osteotomy, for correcting kyphosis in AS patients planned preoperatively with computer software-assistance. 36 consecutive AS patients with thoracolumbar kyphosis were treated with one-stage posterior Y shape osteotomy and preoperative surgical planning was done with the aid of the Surgimap Spine. Radiolog...

The variation in the shape of the Y chromosome of Drosophila pseudoobscura Frolowa was first observed by LANCEFIELD (1929). He found that race A of this species has a J-shaped, and race B a V-shaped Y chromosome. This difference in the shape of the Y chromosome remains the only known “morphological” differential between the two races of this species, which are otherwise distinguished by their b...

Let U, V, W be independent random variables having a standard gamma distribution with respective shape parameters a, b, c, and define X = U/(U + W), Y = V/(V + W). Clearly, X and Y are correlated each having a beta distribution, X ∼ B(a, c) and Y ∼ B(b, c). In this article we derive probability density functions of XY, X/Y and X/(X + Y).

The shape-from-shading (SFS) equation relating u(y, r), the unknown (angular) height of a surface, to I(y, r), the known synthetic aperture radar (SAR) intensity data from the surface, is

To confirm my previous findings that the A(y) allele at the agouti locus reduced the mandible size and therefore altered the mandible shape in a KK mouse strain background, I further investigated the effects of the A(y) allele on mandible morphology on different strain backgrounds, DDD and B6. Principal component analysis revealed that the mandible was significantly smaller in A(y) mice (DDD-A(...

In “Shape From Specular Flow: Is One Flow Enough?” (Vasilyev, et al., 2011 [5]) we show that mirror shape can often be reconstructed from the observation of a single specular flow. In this technical report we provide additional details that, due to space constraints, could not be included in the paper. First we provide a derivation of the linear system for the reflection field derivative in the...

T h e covariance ma t r i x of a rotationally s y m m t r i c shape i s a scalar ident i ty ma t r i x . In this paper, w e apply this property of covariance m a t r i x t o deskew the skewed shape of rotational s y m m e t r y . T h e parameters of the deskew t rans format ion m a t r i x are solved by lett ing the covariance ma t r i x of t he t rans formed shape be equal t o a scalar ident i...

W e describe a new invariant-based data model for image databases under our approach fo r shape-based retrieval. The data model relies on contours description of the image shape, and emphasizes the use of invariants. Efjicient indexing is based on geometric invariant features, while semi-local multi-valued invariant signatures are used for ranking the answers. The advantages of the proposed app...

Semi-solid feedstock of AZ80 magnesium alloy modified by [trace] rare-earth Y element 10 (0, 0.2, 0.4, 0.8 wt.%) were fabricated by [strain-induced melting activation] (SIMA) in the form of 11 extrusion and partial remelting. The effect of Y addition on the microstructure evolution of [the] 12 extruded and [isothermally heat] treated alloy was observed by [using an] optical microscope (OM), 13 ...