146 research outputs found

    Wide scope indefinites in Russian

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    This paper contributes to the cross-linguistic study of indefinites by reporting on two experimental studies on the scopal and functional properties of the two Russian indefinites koe- and -to. We show that koe- allows not only wide scope readings out of syntactic islands, but also functional readings, much like English a certain. -to, on the other hand, allows all possible scopal readings and both functional and non-functional readings. We then discuss this state of affairs from the perspective of a number of prominent theories of indefinite scope

    Surface texturing of steel by femtosecond laser and accompanying structure/ phase transformations

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    Topography, structure, and phase composition of surface layers of AISI 321 stainless steel textured by 1030-nm 320-fs-laser pulses were studied by scanning electron microscopy and X-ray diffraction analysis. Variation in single-pulse fluence and the number of pulses was found to change the laser-produced surface texture from onedimensional quasi-periodic nanograting to microrelief of various roughnes

    Ionic Tuning of Cobaltites at the Nanoscale

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    Control of materials through custom design of ionic distributions represents a powerful new approach to develop future technologies ranging from spintronic logic and memory devices to energy storage. Perovskites have shown particular promise for ionic devices due to their high ion mobility and sensitivity to chemical stoichiometry. In this work, we demonstrate a solid-state approach to control of ionic distributions in (La,Sr)CoO3_{3} thin films. Depositing a Gd capping layer on the perovskite film, oxygen is controllably extracted from the structure, up-to 0.5 O/u.c. throughout the entire 36 nm thickness. Commensurate with the oxygen extraction, the Co valence state and saturation magnetization show a smooth continuous variation. In contrast, magnetoresistance measurements show no-change in the magnetic anisotropy and a rapid increase in the resistivity over the same range of oxygen stoichiometry. These results suggest significant phase separation, with metallic ferromagnetic regions and oxygen-deficient, insulating, non-ferromagnetic regions, forming percolated networks. Indeed, X-ray diffraction identifies oxygen-vacancy ordering, including transformation to a brownmillerite crystal structure. The unexpected transformation to the brownmillerite phase at ambient temperature is further confirmed by high-resolution scanning transmission electron microscopy which shows significant structural - and correspondingly chemical - phase separation. This work demonstrates room-temperature ionic control of magnetism, electrical resistivity, and crystalline structure in a 36 nm thick film, presenting new opportunities for ionic devices that leverage multiple material functionalities

    Role of epicardial adipose tissue in the development of cardiovascular diseases

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    Epicardial adipose tissue (EAT) has unique properties due to its special anatomical structure, thermoregulation, and metabolic activity. Dysregulated EAT provokes the synthesis of pro-inflammatory cytokines, disorders in the metabolism of fats and glucose, as well as contributes to fatty degeneration of the myocardium and heart failure development. EAT may serve as a risk factor and biomarker for cardiovascular diseases, and is also a potential therapeutic target. The purpose of this review was to highlight current research data on EAT, secreted adipokines, their effect on target tissue metabolism, and to systematize the relationship between EAT and cardiovascular diseases. In particular, its function, role in heart failure, atrial fibrillation, as well as the prognostic value of various microRNAs determined in EAT are highlighted

    Grammatical meaning and the second language classroom : introduction

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    This special issue assembles empirical work on second language teaching and learning from a generative linguistic perspective. The focus is on properties that constitute grammar–meaning interaction, that differ in the native and target language grammars, and that have not been highlighted in the pedagogical literature so far. Common topics address whether and how learners acquire grammatical meanings in the second language, including difficult misalignments between native and target-language constructions and functional morphemes. We propose that teaching and learning a second language can be enhanced by focusing on the relationship between grammatical forms and their meanings, as elucidated by contemporary linguistic theory
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