Preeclampsia is a disease of the human species, described more than a century ago, of unknown cause, which shares with atherosclerosis risk factors, biochemical abnormalities, endothelial dysfunction and a multifactorial origin. Reducing atherosclerosis lethality is achieved with secondary prevention; and similarly, in preeclampsia, early diagnosis and timely obstetric resolution (secondary pre...

Quadrature amplitude modulation (QAM), deployed in billions of communication devises, exhibits a shaping-loss of πe/6 (≈ 1.53 dB) compared to the Shannon-Hartley theorem. With inspiration gained from special (leaf, flower petal, and seed) packing arrangements (so called spiral phyllotaxis) found among plants, we have designed a shape-versatile, circular symmetric, modulation scheme, the Golden ...

We have tested the applicability of the global modal approach in the density wave theory of spiral structure for a sample of six spiral galaxies: NGC 488, NGC 628, NGC 1566, NGC 2985, NGC 3938 and NGC 6503. The galaxies demonstrate a variety of spiral patterns from the regular open and tightly wound spiral patterns to a multi-armed spiral structure. Using the observed radial distributions of th...

Geometrical design of the spiral crystal selector can affect crystal orientation in the final single crystal structure. To achieve a better understanding of conditions associated with the onset of crystal orientation in a spiral crystal selector, temperature field was investigated using three-dimensional finite element method during the process. Different geometries of spiral crystal selec...

Based on the fan-beam reconstruction formula recently developed by Noo et al. [Phys. Med. Biol. 47, 2525-2546 (2002)] we develop a Feldkamp-type algorithm for the reconstruction of a volume of interest (VOI) from super-short-scan data. With either a circular or spiral scanning locus in our VOI reconstruction scheme, we first estimate fan-beam data from cone-beam data using the popular "cosine c...

PURPOSE To quantitatively assess the performance and reproducibility of 3D spiral coronary artery wall imaging with beat-to-beat respiratory-motion-correction (B2B-RMC) compared to navigator gated 2D spiral and turbo-spin-echo (TSE) acquisitions. MATERIALS AND METHODS High-resolution (0.7 × 0.7 mm) cross-sectional right coronary wall acquisitions were performed in 10 subjects using four techn...

AIM The aim of this study was evaluation of constructive alignment of student perceptions to a spiral curriculum, as a pre-requisite to successful learning. METHOD A survey was undertaken to evaluate student thoughts and experiences of a spiral curriculum, by participation in an anonymous voluntary questionnaire. Students were asked to rate their thoughts on their understanding, perceived ben...

(i) Develop a three-dimensional hurricane-vortex initialization scheme using the Advanced Microwave Sounding Unit (AMSU) data, radar, QuickSCAT, and other in situ and remote sensing observations; (ii) improve the formulations of cloud microphysics, boundary-layer physics and air-sea interactive processes in hurricane models; (iii) study the larger-scale environments that are favorable for, and ...

We present a self-consistent theory of magnetic short-range order based on a spin-rotation-invariant slaveboson representation of the 2D t-J model. In the functional-integral scheme, at the nearest-neighbour pairapproximation level, the bosonized t-J Lagrangian is transformed to a classical Heisenberg model with an effective (doping-dependent) exchange interaction which takes into account the i...

This paper extends some of the previous work on synaptically generated traveling waves from one dimension to two dimensions. Numerical simulations of networks of the so-called theta neurons were used for exploration of the existence, stability and the nature of these waves. The symmetric nature of the traveling waves was justi"ed and a numerical scheme for evaluating the velocity of the traveli...