In this paper, we first show a DDH Lemma, which states that a multi-variable version of the decisional Diffie-Hellman problem is hard under the standard DDH assumption, where the group size is not necessarily known. Our proof, based on a self-reducibility technique, has a small reduction complexity. Using DDH Lemma, we extend the FSS pseudorandom generator of Farashahi et al. to a new one. The ...

We design a linearly homomorphic encryption scheme whose security relies on the hardness of the decisional Diffie-Hellman problem. Our approach requires some special features of the underlying group. In particular, its order is unknown and it contains a subgroup in which the discrete logarithm problem is tractable. Therefore, our instantiation holds in the class group of a non maximal order of ...

The main objective of this paper is to develop a simple technique for contrast enhancement of monochrome and color images using Discrete Dual Hahn (DDH) moments. The basic idea of our approach is to measure a local contrast at each band of a DDH moment matrix and use it to modify them. These modified moments are used to construct the enhanced image by taking the inverse DDH moment transform. Fo...

The genomic DNA-DNA hybridization (DDH) method has been widely used as a practical method for the determination of phylogenetic relationships between closely related biological strains. Traditional DDH methods have serious limitations including low reproducibility, a high background and a time-consuming procedure. The DDH method using a genome-probing microarray (GPM) has been recently develope...

The surgical management of patients with neglected developmental dysplasia of the hip (DDH) after the age of 6 years has been the subject of controversy. We present 11 cases (16 hips) of neglected DDH that were treated operatively by means of open reduction and derotational subtrochanteric osteotomy. Patient age ranged between 10 and 17 years (mean, 12 years). Follow-up ranged from 5 to 13 year...

The Developmental Dysplasia of the Hip (DDH), also know as Congenital Dislocation of the Hip, is common in infants and children and may persist into adulthood. The radiographic interpretation is highly conditioned by appropriate patient positioning and image quality criteria. The main goal of this study is to demonstrate the value of radiographic evaluation of DDH. Through the retrospective ana...

The gate control theory (GCT) of pain proposes that pain- and touch-sensing neurons antagonize each other through spinal cord dorsal horn (DH) gating neurons. However, the exact neural circuits underlying the GCT remain largely elusive. Here, we identified a new population of deep layer DH (dDH) inhibitory interneurons that express the receptor tyrosine kinase Ret neonatally. These early RET+ d...

Purpose: Developmental dysplasia of the hip (DDH) increases the risk of secondary degenerative changes and subsequent total hip arthroplasty. The postoperative quality of life in patients with DDH who have been born and grown with this disability and adapted to it during the life, is one of the most challenging issues. This study aimed to compare the quality of life of patients with DDH before ...

Developmental dysplasia of the hip (DDH) is most common anatomical pathology in newborns. Traditionally, standard physical exam for newborns includes stability testing using Barlow and Ortolani maneuvers. If pediatrician detects instability, then they are referred a ultrasound—the gold DDH diagnosis. We present our experience with simulation model teaching point care ultrasound examination an i...

INTRODUCTION Developmental dysplasia of the hip (DDH) is an important disease leading to osteoarthritis (OA), as it is well established that high stress concentrations during weight-bearing ambulation cause osteoarthritis. Historically, static geometric factors, e.g. center-edge (CE) angle, Sharp angle, Acetabular roof obliquity (ARO), and acetabular head index (AHI), have been used to quantify...