Explore the vast range of titles available.

What emerges from designers' spring cleaning: simple, city-perfect pieces combined with a chic new sense of proportion. Fluid, soft-color fabricscut long and flowing, worn snugly wrapped, or draped and slit so they swirl-combine in gently overlapping layers that are built to move

Acquired reactive perforating collagenosis (ARPC), rare disorder characterized by transepidermal elimination (TEE) of collagen fibers, is seen in adult diabetics. Genetic predisposition, familial aggregation, trauma, bites and scratching are implicated. Diabetics develop microvascular diseases leading to intense pruritus causing repeated micro trauma leading to necrosis of connective tissue of dermis, causing TEE. Isolated papules, plaques and nodules with central keratotic plugs, are mostly seen on extensor surfaces of limbs but trunk and face may be involved. Histopathology shows extrusion of abnormal collagen fibers through epidermis. Multiple treatment modalities show variable response. A 52 year old diabetic female had multiple, itchy, well defined, erythematous papules and plaques with central adherent crusting on lower back since 1 month. Histopathology showed cup shaped epidermal depression filled with plug of altered collagen, acanthotic epidermis with hyperkeratosis and parakeratosis. Underlying epidermis was thin with fine slits through which vertically oriented basophilic collagen fibers were extruded.

We have constructed a microfabricated circular corral for bacteria made of rings of concentric funnels which channel motile bacteria outwards via non-hydrodynamic interactions with the funnel walls. Initially bacteria do move rapidly outwards to the periphery of the corral. At the edge, nano-slits allow for the transport of nutrients into the device while keeping the bacteria from escaping. After a period of time in which the bacteria increase their cell density in this perimeter region, they are then able to defeat the physical constrains of the funnels by launching back-propagating collective waves. We present the basic data and some nonlinear modeling which can explain how bacterial population waves propagate through a physical funnel, and discuss possible biological implications.

According to the application requirements of abrasive water jet emergency cutting steel, the cutting characteristics of different steels are analyzed from the aspects of cutting erosion section, cutting-in and cutting parameters by experimental research method. What’s more, the effects of operating parameters such as jet pressure, target distance, nozzle diameter, cutting angle, transverse speed, abrasive concentration and repeated cutting times on cutting-in are emphatically analyzed; Combined with the experimental data, AMPSO (Adaptive Mutation Particle Swarm Optimization)—BP (Back Propagation) neural network and AMPSO-SVM (Support Vector Machine) algorithm are designed to predict the cutting-in. The results showed that the erosion sections of different steels had similar morphology, and the trailing and roughness characteristics of the sections were closely related to the cutting-in; Compared with pre-mixing high pressure cutting, post-mixing ultra-high pressure cutting had deeper and finer slits, but there was a larger uncut area at the tail; Pressure, target distance and transverse speed were the key operating parameters affecting cutting-in. Both AMPSO-BP and AMPSO-SVM algorithm can predict cutting-in with mean relative errors of 10.03% and 6.34% respectively.

This paper presents a comprehensive numerical analysis of super-resolution imaging using dielectric microparticles, employing the Finite-Difference Time-Domain (FDTD) method to elucidate the mechanisms that enable resolution enhancements beyond the diffraction limit. Our study demonstrates that dielectric microparticles can achieve a resolution on the order of 50 nm in the visible spectrum, surpassing traditional optical microscopy limits. By simulating the propagation of radiation through a microparticle-object system and generating optical images via a backward propagation technique, we reveal critical insights into how microparticles enhance image contrast and resolution. The study also explores the influence of various parameters, such as source coherence and particle-substrate interactions, on the image formation process. Our results not only validate the super-resolution capability of microparticle-assisted imaging but also provide a robust framework for further advancements in optical imaging technologies, with potential applications in fields requiring ultra-high-resolution visualization.

The two-point complex coherence function constitutes a complete representation for scalar quasi-monochromatic optical fields. Exploiting dynamically reconfigurable slits implemented with a digital micromirror device, we report on measurements of the complex two-point coherence function for partially coherent light scattering from a `scene' comprising one or two objects at different transverse and axial positions with respect to the source. Although the intensity shows no discernible shadows in absence of a lens, numerically back-propagating the measured complex coherence function allows estimating the objects' sizes and locations -- and thus the reconstruction of the scene.

The cut of the season is long, loose, and charged with sex appeal—the perfect foil for fall's new extreme elegance.

Better the view from behind with striking shape-shifting dresses that leave a lasting impression coming and—especially—going.