نتایج جستجو برای: ultrafine filler
تعداد نتایج: 12732 فیلتر نتایج به سال:
BACKGROUND Digital maps are instrumental in conveying information about environmental hazards geographically. For laypersons, computer-based maps can serve as tools to promote environmental health literacy about invisible traffic-related air pollution and ultrafine particles. Concentrations of these pollutants are higher near major roadways and increasingly linked to adverse health effects. Int...
Laser welding of dissimilar aluminium alloys with filler material Luís Filipe Amaro Pinto Instituto Superior Técnico – Technical University of Lisbon – Portugal September 2008 Abstract The aluminium alloys are materials with great potential because of its high strength and low weight. However, the welding of dissimilar aluminium alloys is difficult in autogeneous welding, due to these alloys ar...
In this research, microstructure and mechanical properties of AISI316 to AISI430 dissimilar joint were investigated. For this purpose, GTAW process using ER316L and ER2209 filler metals with diameter of 2.4 mm was used. The microstructure and fracture surface of the welded samples were characterized by optical microscopy and scanning electron microscopy. Also the mechanical properties of the we...
A complete understanding of the mechanisms upon which a filler acts in a cement-based material, e.g. as a C–S–H nucleation and/or growthinducing factor, is of high importance. Although various studies report on accelerated cement hydration in the presence of fillers, the reason behind these observations is not completely understood yet. This work contributes to this subject, by providing an exp...
Long waits online undermine users’ evaluations of Web sites and their providers, triggering abandonment behaviors. Yet e-business researchers and practitioners have not perfected mechanisms to respond to online wait issues. A filler interface that runs during the wait for search results may influence online users’ perceived waiting time (PWT); however, no scientific investigation has attempted ...
Abstract Since the early days of generative grammar, the study of "unbounded dependencies" such as wh-questions and relative clauses has occupied a central place in both syntactic theory and language processing research. The problem that such constructions pose is as follows. In a normal wh-question, a wh-phrase is typically displaced to the left periphery of a clause (What did you say - to Joh...
The discussion of whether the role information encoded by verbs is anticipatorily used in sentence comprehension apart from the world knowledge in the context has been a while. However, in head-initial languages like English, it is difficult to tell apart the use of lexical information like verbs from that of world knowledge information because roles associated with role fillers are mostly enco...
Double object questions are harder to process than the corresponding questions with prepositional objects (Boland 1997). When given the choice between the two, a parser prefers to wait and not associate a filler with a gap in a double object construction, contrary to the prediction of the Active Filler Hypothesis (Frazier 1987). I propose that the reason the parser holds back is that it wants t...
BACKGROUND The systemic consequences of esthetic filler injections are poorly understood. CASE PRESENTATION We report a patient with a past history of subcutaneous injection of aesthetic filler material in the lower legs, who presented with post-infectious glomerulonephritis following necrotic leg ulcers at the injection site. Kidney biopsy revealed the presence of translucent, non-birefringe...
We evaluated the concentration of fluoride release at the initial stage and after recharging the fluoride from a resin-based sealant containing surface reaction-type pre-reacted glass-ionomer (S-PRG) filler and conventional resin-based sealants. The concentration of other ions released from the sealants in the surrounding distilled water was also examined. At the initial stage, fluoride was rel...
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