نتایج جستجو برای: cmod
تعداد نتایج: 73 فیلتر نتایج به سال:
The study and prediction of velocities in the pedestal region of Alcator CMod are important for understanding plasma confinement and transport. In this study we examine the simplified neoclassical predictions for impurity flows using equations developed for plasmas with background ions in the Pfirsch-Schlüter (high collisionality) and banana (low collisionality) regimes. B flow profiles for H-m...
Abstract In this paper, the probabilistic behavior of plain concrete beams subjected to flexure is studied using a continuous mesoscale model. The model two-dimensional where aggregate and mortar are treated as separate constituents having their own characteristic properties. represented ellipses generated under prescribed grading curves. Ellipses randomly placed so it requires analysis for Mon...
Saturated concrete is significantly different from dry in fracture mechanical properties. Using the wedge-splitting tensile method to research rule of change moisture content, double-K toughness and energy three strength grades (C20, C30, C40) immersed a free water environment for 0 h, 2 5 24 120 h were studied order provide support safety evaluation structures environment. The initial cracking...
This paper introduces algorithms designed to retrieve high-resolution ocean surface wind fields from satellite borne synthetic aperture radars (SARs) operating in C-band at either vertical (VV) or horizontal (HH) polarization in transmit and receive. Wind directions are extracted from wind induced streaks that are visible in SAR images at scales above 200 m and that are approximately in line wi...
Regimes of High Confinement (H-mode) have been studied in the Alcator CMod tokamak [Hutchinson et al., Phys. Plasmas 1, 1511 (1994)]. Plasmas with no Edge Localized Modes (ELM-free) have been compared in detail to a new regime, Enhanced Dα (EDA). EDA discharges have only slightly lower energy confinement than comparable ELM-free ones, but show markedly reduced impurity confinement. Thus EDA dis...
Abstract In this study, the effect of carbon black and graphite filler on crack initiation fracture parameters fly ash geopolymer mortar is investigated. The was added in amount 0.5 1.0% powder 5 10% relative to mass. reference mixture without any also prepared. characteristics were determined based results three-point bending test prismatic specimens provided with an initial central edge notch...
This paper presents a part of development non-standard method for testing cylindrical test specimens measurement fracture properties pipeline materials. structures working under pressure is based on determining mechanics parameters SENT (Single Edge Notched Tension) and new PRNT (Pipe Ring specimens. In this work, both types required were manufactured from polyamide PA12 by using SLS (selective...
Abstract We have developed C-band compact polarimetry geophysical model functions for RADARSAT Constellation Mission ocean surface wind speed retrieval. A total of 1594 RADARSAT-2 images acquired in quad-polarization SAR imaging mode were collocated with situ buoy observations. This dataset is first used to simulate polarimetric data and examine their dependencies on radar incidence angle vecto...
Abstract The challenging task of structural design under safety, economic efficiency and environmental sustainability constraints has led to the development several efficient materials. In this context, steel fiber reinforced concrete (SFRC) stands out due post-cracking behavior related its enhanced toughness. Recent normative codes consider composite, suggesting good performance broadening app...
Ocean winds in the Baltic Sea are expected to power many wind farms in the coming years. This study examines satellite Synthetic Aperture Radar (SAR) images from Envisat ASAR for mapping wind resources with high spatial resolution. Around 900 collocated pairs of wind speed from SAR wind maps and from 10 meteorological masts, established specifically for wind energy in the study area, are compar...
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