OBJECTIVES Precise measurements of aortic annulus dimensions are crucial for prosthesis size selection in patients undergoing transcatheter aortic valve implantation (TAVI). The so-called effective diameter (derived from area) measured in multislice computed tomography (MSCT) images has evolved to be the most precise measurement tool. Usually, the operator must manually adjust the aortic annula...

Multi-color and broadband visible emission was realized thorough the hexagonal annular structure of GaN. The annular structure fabricated by selective-area growth emitted purple, blue and green color-emission from the multi-facets. The hexagonal annular structure provided various sidewalls of {101} and {112} semi-polar facets, and (0001) polar facet. From the cathodoluminescence study, the (000...

PURPOSE To investigate six cases of annular cyclitis. METHODS All patients with impairment of visual acuity underwent complete ophthalmologic examination, color fundus photography, laboratory tests and fluorescein angiography. Indocyanine green (ICG) angiography and B-scan ultrasonography were also performed in three cases in order to diagnose the disease. RESULTS All patients presented a u...

Acute annular urticaria is a common and benign cutaneous hypersensitivity reaction seen in children that manifests with characteristic annular, arcuate, and polycyclic urticarial lesions in association with acral edema. It is mistaken most often for erythema multiforme and, occasionally, for a serum-sickness-like reaction. Although these 3 entities may present in a similar manner, specific clin...

Annular quasimonoenergetic electron beams with a mean energy in the range 200-400 MeV and charge on the order of several picocoulombs were generated in a laser wakefield accelerator and subsequently accelerated using a plasma afterburner in a two-stage gas cell. Generation of these beams is associated with injection occurring on the density down ramp between the stages. This well-localized inje...

Introduction Annular pancreas is a rare congenital abnormality characterized by a ring of pancreatic tissue surrounding the descending portion of the duodenum. Annular pancreas coexisting with replaced common hepatic artery which is also a rare anatomical variation has not been reported previously. Case Presentation A 53-year-old man visited our hospital complaining of epigastric pain. Based ...

We studied coupling phenomena between surface plasmons and electromagnetic waves in the microwave spectrum using circular apertures surrounded by array of grooves.We first present experimental and theoretical results of enhanced microwave transmission though a subwavelength circular aperture with concentric periodic grooves around the surface plasmon resonance frequency. This is followed by tra...

Flow visualization of two phase flow pattern of steam during condensation process in separate horizontal quartz micro-tubes with inner diameter ranging from 70-675 m was conducted. Two main kinds of flow patterns were observed: annular flow and slug flow, which both were nearly symmetrical. The annular flow also can be divided into two kinds: annular flow and annular-wave flow. The effects of t...

To Hehzut Hasse on his 6~. birthday Let f(a) be a holomorphic. function in the open unit disk D in the complex plane. (b) given any 8 > 0, there exists an n, = no(&) suc,h that, for every IL > rtO, J, lies in the region 1-E < 1 z 1 < 1. Set p!c, = p$ I f(z) I If lim pu, = 00, then we call f, for brevity, an annular function.-CO As is evident from this definition, an annular fun&ion f is not ide...

Responses of free standing subwavelength annular dielectric nanorod arrays are described. Extreme reflection peaks with high quality factor follow a multiple scattering approach, which can be explained by geometrical resonance. It is demonstrated that the value and the resonant frequency of the sharp geometric resonance modes can be tuned by geometric parameters such as the outer radius, inner ...