Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 685 for “"Shrinkage"”.
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Shrinkage characteristics of lodgepole pine
This study examined shrinkage and related characteristics of two North American varieties of lodgepole pine: Pinus contorta var. latifolia and Pinus contorta var. murrayana, sampled at 10% of tree height. For var. murrayana, size was the only factor that had a significant effect on specific …
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Diversity shrinkage of pareto-optimal solutions in hiring practice: Simulation, shrinkage formula, and a regularization technique
… limitation of the technique—the possibility of shrinkage, especially diversity shrinkage, in the Pareto-optimal solutions. The dissertation consists of three studies. Study 1 attempts to study diversity shrinkage and job performance validity shrinkage using Monte-Carlo simulation. Using Monte …
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Shrinkage Estimation for Aalen's Additive Model
… information) and produce James-Stein-type of shrinkage estimators. We develop the asymptotic joint distribution of such restricted and unrestricted estimators and use it for studying the relative performance of the proposed estimators via their asymptotic distributional biases and risks. We …
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Shrinkage of concrete using porous aggregates
… There are several types of volume changes, but shrinkage is the type of volume change which is often responsible for cracking of the concrete. Shrinkage can be categorized due to several different mechanisms which cause shrinkage. The main types of shrinkage are plastic shrinkage, chemical …
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Drying shrinkage of Portland cement mortar
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Civil and Sanitary Engineering, 1959.
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Development of Concrete Shrinkage Performance Specifications
… types of deformation experienced by concrete is shrinkage. The four main types of shrinkage associated with concrete are plastic, autogeneous, carbonation and drying shrinkage. The volume changes in concrete due to shrinkage can lead to the cracking of the concrete. In the case of reinforced …
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Evaluating shrinkage of fly ash - slag geopolymers
… of geopolymers when used in field. Since shrinkage causes volume change, any volume change after the binder has stiffened will cause stresses to develop and this will cause cracks and reduction in the load carrying capacity of the mix. The study was performed on a user-friendly geopolymer …
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Polymerization shrinkage stress of light curing dental composites
OBJECTIVES: To analyze the polymerization shrinkage stresses flowable and universal dental composites at different times. MATERIALS AND METHODS: Seven flowable and four universal composites; were used in this study. Two glass cylinders were fixed in a vertical position on the INSTRON machine; …
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Drying Shrinkage and Microstructure of Hydrated Calcium Silicates
Made available in DSpace on 2014-12-14T15:24:03Z (GMT). No. of bitstreams: 1 7913521.pdf: 7919333 bytes, checksum: 93329c9cc76cd3e2ac21fd6a8cc48f0d (MD5) Previous issue date: 1978
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Comparison of ridge and other shrinkage estimation techniques
Shrinkage estimation is an increasingly popular class of biased parameter estimation techniques, vital when the columns of the matrix of independent variables X exhibit dependencies or near dependencies. These dependencies often lead to serious problems in least squares estimation: inflated …
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Low shrinkage metal skeletons by three dimensional printing
… of the necks during the sintering step causes a shrinkage of the part which, in general, is not uniform and has a certain amount of error associated with it. As currently practiced, the magnitude of the shrinkage is 1.5% and the uncertainty is 0.2%. The 3DP process can compensate for a given …
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Shrinkage and strength of compacted sand-clay mixtures
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Building Engineering and Construction, 1956.
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Army installations of the future : urban + shrinkage + landscape
The US Army has set a course to transition to a future force that is adaptive, modern, and at the forefront of change. This strategic vision lacks a refined installation strategy to meet the needs of the future force. In a period of troop reductions, declining budgets, and increased facility …
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In-Situ Measurement of Resin Shrinkage for Aerospace Components
<p>Resin shrinkage due to chemical changes and thermal gradients plays an important role in the residual stress evolution during composite manufacturing. In this thesis, we develop a new in-situ experimental approach for measuring resin shrinkage during curing with the help of digital image …
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Mechanism of anisotropic shrinkage during sintering of metalli powders
… 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 Curie temperature, while in austenitic field is quite poor. The …
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Swelling, shrinkage and shear strength of unsaturated expansive clays
The swelling, shrinkage and shear strength properties of unsaturated expansive clays are examined in this thesis. This research was instigated to provide the engineer with improved techniques for predicting the swelling behaviour encountered in unsaturated expansive clays. To achieve this …
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