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 279 for “"Subtraction"”.
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Background subtraction by disparity warping
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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POSIT: Process Oriented Subtraction-Interface for Tutoring
… (ITS) which I have called Process Oriented Subtraction-Interface for Tutoring or POSIT. POSIT is an Intelligent Tutoring System, developed on a microcomputer, and based on Anderson's (1982, 1987) ACT* model of learning. Unlike the tutoring systems that were developed by Anderson and his …
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Null subtraction imaging technique for biomedical ultrasound imaging
… and thus decreasing lateral resolution. Null subtraction imaging (NSI) is a nonlinear image processing technique that uses different on-receive apodizations on copies of the same image to reduce sidelobe levels while also dramatically improving lateral resolution. In the NSI technique, three …
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Fostering fluency with basic addition and subtraction facts
… investigating knowledge and use of the addition-subtraction complement principle (if a + b = c, then c – b = a or c – a = b) by pupils in grades kindergarten to 3. Eighty-one children from three public schools serving a mid-western community participated in the study. Participants were assigned …
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Fostering Preschoolers' Understanding of the Addition -Subtraction Inverse Principle
… for a key arithmetic concept, the addition-subtraction inverse principle (e.g., 2 + 1 - 1 = 2). Twenty-four 4 to 5 years old Taiwanese children from two public preschools serving low- and middle-income families participated in the training experiment. Half were randomly assigned to an …
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Feasibility of using Lodox to perform digital subtraction angiography
… and the origin of lesions or blockages. Digital subtraction angiography (DSA) is a tool used to improve the clarity of the vessels being imaged for better and easier decision making in diagnostics and planning. Lodox, a low dose x-ray system developed by Debex (Pty) Ltd, a subsidiary of de Beers, …
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An improved Gaussian mixture model algorithm for background subtraction
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.
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Digital subtraction radiography for monitoring carious lesions using clinical radiographs
… progressing or regressing.<br/><br/>Digital subtraction radiography (DSR) has been available for several years and has a possible application in monitoring progression and regression of carious lesions over time. DSR is the process of computerised subtraction of grey values of geometrically …
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Electric neutron polarizability and eigenspectrum subtraction techniques for disconnected quark loops.
I present an analysis for the mass shift of the neutron in order to obtain the neutron electric polarizability. Neutron electric polarizability can be studied by implementing a static electric field on the lattice. The implementation of this field, though, is non-trivial and the "proper" form for …
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Development of Conceptual and Procedural Knowledge in Preschoolers' Addition and Subtraction
Learning in some domains requires the learner to construct relations between conceptual and procedural knowledge. However, we still do not have full knowledge about the underlying processes. Understanding of this issue will help researchers not only in building theories of knowledge acquisition but …
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Mitigation of Interference From Iridium Satellites by Parametric Estimation and Subtraction
Radio astronomy is the science of observing the universe at radio frequencies. In recent years, radio astronomy has faced a growing interference problem as radio frequency (RF) bandwidth has become an increasingly scarce commodity. Communication systems such as Earth orbiting communication …
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Children's Awareness of Structural Relationships Embedded in Addition and Subtraction Word Problems
A common practice in primary schools is the use of tasks that involve children solving word problems. A great deal of research has focused on improving children's performance in these tasks by various forms of instruction. This study aims to reveal transitions in children's thinking about; and …
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Subtraction - - Whole Numbers When the Minuend Contains Fewer Units Than the Subtrahend
… question: Which method or methods of teaching subtraction are being used in the elementary school today? An attempt also was made to answer the question: Why?
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Fostering fluency with basic addition and subtraction facts using computer-aided instruction
Achieving fluency with the basic addition and subtraction combinations is difficult for many students in grades 1 to 3. Two papers chronicle three experiments, which entailed evaluating the efficacy of software designed to promote fluency with add-with-8 or -9, near-doubles (e.g., 5 + 6), and …
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Evaluation of null subtraction imaging and interpolation techniques for ultrasound B-mode
… one particular super-resolution method, null subtraction imaging, under these conditions while also demonstrating methods to overcome the challenges previously encountered with this method.
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