This paper proposes a new approach to sparse-signal detection called the horseshoe estimator. We show that the horseshoe is a close cousin of the lasso in that it arises from the same class of multivariate scale mixtures of normals, but that it is almost universally superior to the double-exponential prior at handling sparsity. A theoretical framework is proposed for understanding why the horse...

The effect of the shape of six different periodic forces and second periodic forces on the onset of horseshoe chaos are studied both analytically and numerically in a Duffing oscillator. The external periodic forces considered are sine wave, square wave, symmetric saw-tooth wave, asymmetric saw-tooth wave, rectified sine wave, and modulus of sine wave. An analytical threshold condition for the ...

We have investigated the structure of the cell adhesion molecule L1 by electron microscopy. We were particularly interested in the conformation of the four N-terminal immunoglobulin domains, because x-ray diffraction showed that these domains are bent into a horseshoe shape in the related molecules hemolin and axonin-1. Surprisingly, rotary-shadowed specimens showed the molecules to be elongate...

We consider the motion of coorbital satellites in the framework of the Restricted Three Body problem for We show a mechanism to generate horsehoe periodic orbits and we compute some families of horseshoe periodic orbits when vary ing the Jacobian constant We conclude that there exist stable horseshoe periodic orbits which t with the motion of Saturn coorbital satellites Janus and Epimetheus

Anomalies of the appendix are extremely rare, and a horseshoe appendix is even rarer. A literature search has revealed only five reported cases. In this report, we present a case of a horseshoe appendix.A 78-year-old man was referred for further examination following a positive fecal occult blood test. A mass in his ascending colon was detected on colonoscopy, while computed tomography showed t...

abstract horseshoe lung is a congenital pulmonary malformation that is usually associated with scimitar syndrome. this malformation consists of fusion of both pulmonary lobes from the posterobasal segments. the fusion appears in the retrocardiac area, in front of the esophagus and thoracic aorta. pleural separation of pulmonary lobes distinguishes pseudohorseshoe appearance from a true horsesho...

BACKGROUND AND OBJECTIVE Pyeloplasty in horseshoe kidneys can be challenging due to aberrant vasculature, renal malrotation, and ectopic location. Fewer than 20 cases of minimally invasive (MIS) pyeloplasty in horseshoe kidneys have been reported in the literature to date. We herein report the first 2 cases of laparoendoscopic single-site (LESS) pyeloplasty for UPJ obstruction in horseshoe kid...

Aim: To present a very rare case of bilaterally-complicated horseshoe kidney by nephrolithiasis in a patient with situsinversus with levocardia and skeletal anomalies. Case Report: A 41-year-old female presented by right loin pain. Abdominal ultrasound showed bilateral kidney stones with malrotation, right mild hydronephrosis and transposition of the abdominal organs. Chest X-ray showed the hea...

Horseshoe crabs have been a model for many biomedical science studies. Medicinal value of horseshoe crabs comes from its blue blood, eye and exoskeleton (chitin). Ability of blood to clot in the presence of bacteria, rendering the bacteria harmless has created its biomedical importance. Blood cells (amebocytes) carry Factor C, which binds lipopolysaccharide (LPS), undergoes a structural reorgan...