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.
Results
Showing 1 to 20 of 1292 for “"Top-down"”.
-
Top-down modulation of visual attention
This body of work examines the effects of pre-cues on visual search for targets defined by a colour-orientation conjunction. Cueing the identity of targets enhanced the efficiency of search, with stronger effects from cueing the colour of the target compared to cueing its orientation, even though …
-
Database support for top-down proteomics
Top-down proteomics is a revolutionary application for the identification and characterization of protein, known to be one of the most complicated and challenging issues in biology. In top-down proteomics, the quality and speed of the data warehouse is very important, as high accuracy results are …
-
Top-Down Synthesis for Library Learning
This thesis introduces corpus-guided top-down synthesis as a mechanism for synthesizing library functions that capture common functionality from a corpus of programs in a domain specific language (DSL). The algorithm builds abstractions directly from initial DSL primitives, using syntactic pattern …
-
Affective influences on top-down visual attention
… neural substrates and both draw upon limited top-down resources. Attention is biased towards emotional stimuli and these biases are suggested to be a key mechanism in the development of psychopathology. The aim of this thesis was to investigate the impact of affective influences on visual …
-
Top-down attentional control in affective contexts
… influence cognition. The present study examined top-down attentional control, one component of executive function, during three distinct affective contexts. The color-word Stroop task was used to measure top-down attentional control, and an autobiographical memory task manipulated the affective …
-
Integrating bottom-up and top-down information
… a framework for integrating bottom-up and top-down computer vision algorithms. I developed this framework, which I call the Map-Dictionary Pixel framework, because my intuition is that there is a need for tools that make it easier to build computer vision systems that mimic the way human …
-
Top-Down Interrogation And Characterization Of Biological Macromolecules
… analytes.</p> <p>This thesis is focused on the top-down analysis of various macrobiomolecules, nucleic acids and proteins, in the context of ion/ion reaction and gas-phase unimolecular dissociation. The first part of the thesis deals with gas phase fragmentation behavior of chemically modified …
-
Complex Proteoform Identification Using Top-Down Mass Spectrometry
… exhibit different functional behaviors. Because top-down mass spectrometry directly analyzes intact proteoforms and provides complete sequence information of proteoforms, it has become the method of choice for the identification of complex proteoforms. Although instruments and experimental …
-
Pattie: An Automated Tutor for Top-Down Programming
Made available in DSpace on 2014-12-13T18:01:43Z (GMT). No. of bitstreams: 1 7606743.pdf: 3817702 bytes, checksum: 5cb9f8a67aeccd89aa055621d8c71d07 (MD5) Previous issue date: 1975
-
Hardware modeling and top-down design using VHDL
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1991.
-
Top-down design of digital signal processing systems
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
-
Recognition of English vowels using top-down method
… not just through bottom-up processing, but also top-down. In many cases of listening, one can usually predict what will come based on the preceding context, or one can determine what has been pronounced by listening to the following sounds. Therefore, if some cues to a word are given, it would be …
-
Top-down Approach To Securing Intermittent Embedded Systems
… in intermittent computing. This research takes a top-down approach to design secure intermittent systems. To that end, we identify security threats, design a secure intermittent system, optimize its performance, and evaluate our design using embedded benchmarks. First, we identify vulnerabilities …
-
Top-down Cross-Section Controlled III-Nitride Nanowire Lasers
… lasing properties still remains challenging. A top-down two-step etch process developed for vertical GaN nanowires offers the ability to precisely control the cross-section of the nanowire lasers. Consequently, the lasing properties can potentially be tailored by controlling the cross-section. …
-
Top-Down Control of Lateral Interactions in Visual Cortex
… features (Li et al. 2004). We hypothesized that top-down modulation of effective connectivity within V1 underlies the behaviorally dependent modulations of contextual interactions in V1. To test this idea, we used a chronically implanted multi-electrode array in awake primates and studied the …
-
Addressing performance bottlenecks for top-down engineered nanowire transistors
… However, as the scaling dimensions shrink down to the sub-100 nm regime, immense physical challenges make the use of conventional scaling techniques alone insufficient. Novel one-dimensional (1D) structures such as semiconductor nanowires (NWs) are considered to be promising structures for …
-
A new grammatical transformation into deterministic top-down form.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering, 1973
-
Top-down and bottom-up interactions for cortical bursting
… pyramidal neurons could multiplex bottom-up and top-down information via L1-independent tonic spikes and L1-dependent bursts, respectively, and have provided a basis for emerging theoretical models of cortical computation and learning. However, our understanding of burst firing and subcellular …
-
Top-down Modulation of the Chromatic VEP with Hypnotic Suggestion
… composed of both bottom-up (stimulus driven) and top-down (feedback) processes. It has been demonstrated that directed spatial attention enhances processing of attended stimuli, inhibits non-attended stimuli, and increases baseline activity in portions of cortex corresponding to attended areas of …
-
Bottom-up and Top-down Mechanisms of Visually-Guided Movements
… the bottom-up circuits that mediate it and top-down cognitive influences that modulate it. A critical sensorimotor behavior in everyday life is the generation of rapid eye movements, called saccades. By making saccades 2-3 times/second, we scan visual scenes and integrate the incoming visual …
Page 1 of 65