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Showing 1 to 20 of 24 for “"dimensional change"”.
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High-dimensional change point detection for mean and location parameters
Change point inference refers to detection of structural breaks of a sequence observation, which may have one or more distributional shifts subject to models such as mean or covariance changes. In this dissertation, we consider the offline multiple change point problem that the sample size is fixed …
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Development of a model of the anisotropic dimensional change on sintering
… design procedure accounting for anisotropic dimensional changes on sintering. The goal of the project is both enlarging the reference database and investigating in depth the parameters responsible for anisotropic dimensional changes. The effects of green density, geometry, and compaction …
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Improved Numerical Quadrature over General Two-Dimensional Domains Utilizing Curvature Based Domain Decomposition
… for numerical quadrature on a general two-dimensional domain presented by James Lambers. QUAD2D eliminates the error of approximation inherent in general polygonal methods due to the variance between an estimated polygon boundary and the domain boundary. The QUAD2D method achieves …
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Materials Processing Towards Development of Rapid Prototyping Technology for Manufacturing Biomedical Implants
… transformation. Dilatometry revealed that dimensional change reaches to saturation at 1200°C. Mechanical testing of the parts sintered at 1200--1500°C revealed that compressive strength in the 2--10 MPa range was achieved.
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Stimulus Matters: Effects of Familiarity versus Novelty
… were tested in four different versions of the Dimensional Change Card Sort (DCCS). Performance was no different among standard, 2D-familiar, and 3D-familiar conditions. When comparing novel with the standard condition, children performed worse (37% and 68% respectively). Findings support the …
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Volumetric dimensional changes of luting cements
… of this study was to evaluate volumetric dimensional changes and the amount of Ca2+ released by the new luting agent. Twenty specimens of each material, namely calcium aluminate glass ionomer, resin-modified glass ionomer, and two resin luting agents, were fabricated and weighed. The 20 …
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An object-oriented software development environment for geometric modeling in intelligent computer aided design
… previous design. It is difficult to propagate a dimensional change throughout an entire model -- especially solid models. This rigidity imposed by conventional CAD systems discourages a designer from exploring different approaches in creating a novel product.
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Individual Differences in Preschool Aged Children's Inhibitory Control: Adding Borders to the Day/Night Task
… using methodological design features from the Dimensional Change Card Sort (DCCS) Task. This addition allowed the day/night task to serve as a better analogue to the Stroop task, which is an inhibitory control task commonly used with adults. In addition, electroencephalogram (EEG) illuminated …
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The Effects of Perspiration Application, Weathering Exposures, Washing Action of Automatic Home Clothes Washers, and Repeated Laundering on the Ultraviolet Protection of a Naturally Colored Lightweight Cotton Fabric
… cotton fabric. In addition, five fabric property changes in the test specimen after the treatments of perspiration, weathering exposure, washing action, and repeated laundering (i.e., fabric count change, thickness change, weight change, color change and dimensional change) were included in this …
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Transient liquid-phase infiltration of a powder-metal skeleton
… of homogeneous composition without significant dimensional change, unlike traditional infiltration and full-density sintering. Fabrication of direct metal parts with complex geometry is possible using TLI in conjunction with Solid Freeform Fabrication (SFF) processes such as Three-Dimensional …
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Dimensional Stability of Geosynthetic Clay Liners in Landfill Applications
<p>An investigation was conducted related to the dimensional stability of geosynthetic clay liners (GCLs) in landfill applications. Multiple occurrences of panel separation of overlap seams in GCLs have been documented; however, explanation for the relative contribution of various mechanisms …
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Hot embossing as a method for rapid prototyping microfluidic devices
… was found that a maximum range of +/-3[mu]m in dimensional change existed. Gains in tool dimensions were then mainly attributed to the deposition of embossed materials onto the tool. The study further determined a method for creating usable resin tool copies that exhibited a replication accuracy …
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Design and synthesis of molecular actuators and sensors
… approach -- lecular mechanisms, which utilize a dimensional change of a single polymer chain. We propose two types of molecular mechanisms: contracting and expanding. We proposed earlier a calix[4]arenebased molecular actuator for the contracting mechanism, in which p-dimer formation was proposed …
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Mechanism of anisotropic shrinkage during sintering of metalli powders
The anisotropic dimensional change on sintering of a prior cold compacted iron was investigated by dilatometry. Shrinkage is larger along the compaction direction than in the compaction plane. This phenomenon is very pronounced during the heating ramp in alpha phase and in particular below the …
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Examining the Validity of the Preschool Kitchen Task Assessment
… – Preschool Version Parent Form (BRIEF-P), Dimensional Change Card Sort (DCCS), Forward Digit & Backward Digit Span (FDS & BDS). A strong negative significant relationship was found between the participant’s age in months and their total score on the PKTA.</p> <p><strong>Discussion and …
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Reactive binders for metal parts produced by Three Dimensional Printing
Three Dimensional Printing (3DP) is a solid free form fabrication process which enables the construction of parts directly from computer-aided design (CAD) models. In the current process, metal parts are produced by printing a polymer binder into stainless steel powder. The parts are subsequently …
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The effect of pressure on the resistivity and Hall coefficient of amorphous metallic alloys
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-13T14:15:22Z No. of bitstreams: 1 1983_mcneil.pdf: 2009043 bytes, checksum: 17a78b5f271dbede167bc04309ec74b8 (MD5)
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Executive function measures in early childhood screening: Concurrent and predictive validity
… NIH Toolbox measures, the Flanker and Dimensional Change Card Sort (DCCS) tasks, with developmental extensions (Dext) that lower the floor of these measures, and Peg Tapping. Routine screening included well-validated developmental readiness and behavioral measures. Results of …
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The Preschool Kitchen Task Assessment (PKTA): Assessing Validity of a Performance-based Assessment of Executive Function
… Function - Preschool Version (BRIEF-P), the Dimensional Change Card Sort, and the Forward and Backward Digit Span Tasks. Relationships between scores were examined by calculating a Pearson <em>r </em>correlation.</p> <p><strong><em>Results. </em></strong>A good significant correlation was …
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High temperature alkali corrosion kinetics of low expansion ceramics
… at higher temperatures, apparently due to the change in reaction layer morphology from a highly porous to a more dense structure. The observed alkali reaction rate of transformation toughened zirconia is linear at all temperatures with an experimental activation energy of 229 kJ/mol. The …
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