IPG Photonics

About: IPG Photonics is a based out in . It is known for research contribution in the topics: Laser & Fiber laser. The organization has 903 authors who have published 1241 publications receiving 63339 citations.

Prominence in Triconstituent Compounds: Pitch Contours and Linguistic Theory

Abstract: According to the widely accepted Lexical Category Prominence Rule (LCPR), prominence assignment to triconstituent compounds depends on the branching direction. Left-branching compounds, that is, compounds with a left-hand complex constituent, are held to have highest prominence on the left-most constituent, whereas right-branching compounds have highest prominence on the second of the three constituents. The LCPR is, however, only poorly empirically supported. The present paper tests a new hypothesis concerning the prominence of triconstituent compounds and suggests a new methodology for the empirical investigation of compound prominence. According to this hypothesis, the prominence pattern of the embedded compound has a decisive influence on the prominence of the whole compound. Using a mixed-effects generalized additive model for the analysis of the pitch movements, it is shown that all triconstituent compounds have an accent on the first constituent irrespective of branching, and that the placement of a second, or even a third, accent is dependent on the prominence pattern of the embedded compound. The LCPR is wrong.

Environmental interfaces, heavy metals, microbes, and plants: applications of XAFS spectroscopy and related synchrotron radiation methods to environmental science

Abstract: During the past decade, applications of synchrotron radiation (SR) methods to environmental science have grown significantly, resulting in a new interdisciplinary field known as molecular environmental science, which focuses on the molecular-level speciation of environmental pollutants and the fundamental chemical and biological processes determining their behavior in complex systems. Here we review some recent applications of XAFS spectroscopy and related SR methods, including micro-XANES and X-ray Standing Wave (XSW) spectroscopy, micro-XRD, x-ray fluorescence micro-tomography, and photoemission spectroscopy to heavy metals and actinides in model systems and more complex environmental samples. Examples include XAFS studies of heavy metals and actinides at environmental interfaces, combined XAFS and XSW studies of heavy metal interactions with microbial biofilm-coated metal oxide surfaces, and combined XANES and photoemission studies of microbial interactions with metal sulfide surfaces.

Onion morphology and microstructure of polyhedral serpentine

Abstract: We describe the shape and internal structure of polyhedral spheroids found in serpentinized peri-dotites. Serpentine spheroids resemble geodesic domes made of ~160 to 180 triangular facets. At facet edges, the nested layers bend by ~14° along their three crystallographic directions, resulting in an onion-like structure with lateral continuity of the layers. The stacking of the serpentine layers within sectors is controlled by interlayer bonding. These polyhedral onions correspond to a novel type of spherical nanostructure for layered materials.