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 46 for “"Semantic Representations"”.
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Semantic representations for spatial expressions
… are expressed via a spatial preposition? What semantic features can we draw from the meanings of the spatial prepositions? How can we decide which semantic features are necessary to specify spatial arrangements? And what kinds of semantic features should we employ in order to disambiguate …
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Integrating content and semantic representations for music recommendation.
… may be used to calculate similarity. Content representations capture the musical and texture facets of each track, and semantic representations describe social and cultural information provided by listeners. This thesis is motivated by an analysis of the strengths and weaknesses of both …
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From perceptual to semantic representations in the human brain
… perceptual details to construct more abstract representations that we call concepts, which span entire categories (such as the one of people) or refer to very specific and individual entities (such as our parents). Organizing our knowledge of the world around concepts, rather than around …
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Interpretable semantic representations from neural language models and computer vision
… a serious drawback to the development of these semantic models is in the ambiguity of these representations, as the dimensions of these feature vectors are no longer characterised by clear, recognisable units of meaning. Even though these models have produced state-of-the-art performance on …
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A comparison of imaging modalities and decoding methods for detecting semantic information in the brain
Representation of semantic information enables us to engage with the world in a meaningful way – to comprehend and produce language, identify and use objects, and understand and participate in events that involve us. Our understanding of where in the brain semantic information is represented has …
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Learning meaning in Genesis
… sentences into a variety of more meaningful semantic representations. I reproduced the functionality of these rules by training the existing rule-learning program UNDERSTAND with 43 human-readable examples of English sentences and corresponding semantic representations, resulting in 18 rules. …
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The Production and Comprehension Lexicons: What Is Shared and What Is Not
… of at least two levels of lexical information, semantic representations and word-forms (phonological and orthographic representations). The results from five experiments tested whether semantic and word-form representations are shared between production and comprehension or separate. The …
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Representing meaning: a feature-based model of object and action words
… and neurally plausible model of lexical-semantic representations, not only for words referring to concrete objects but also for words referring to actions and events using a common set of assumptions across domains. In order to do so, features of meaning are generated by naïve speakers, …
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Modeling False Memory in the Deese-Roediger-McDermott Paradigm: An Approach Using Holographic Declarative Memory
… (DRM) paradigm demonstrates how semantic associations can induce false recall and recognition (Roediger & McDermott, 1995). While cognitive architectures are able to model control processes, they often struggle with large-scale semantic representations which are required for …
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Finding similar questions in large-scale community QA forums
… this paper, we develop a methodology for finding semantically related questions. The task is difficult since 1) key pieces of information are often buried in extraneous details in the question body and 2) available annotations are scarce and fragmented, driven largely by participants. We design a …
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Dynamic speech networks in the brain: Dual contribution of incrementality and constraints in access to semantics
… and constraints in speech on access to lexical semantics. Through three E/MEG experiments I address two core issues in systems neuroscience of language: 1) What are the network dynamics underpinning cognitive computations that take place when we map sounds to rich semantic representations? 2) …
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Question Answering on Dynamic Knowledge Graph for Chemistry
… thesis include the non-shallow structure, the semantic heterogeneity, the embedding of numerical values, and the large scale of the chemistry Knowledge Graph. The thesis studied the two main methods for Knowledge Graph Question Answering: the Semantic Parsing and Knowledge Graph embedding …
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A New Eye On Semantics: Probing the Spatiotemporal Brain Dynamics Underlying Natural Reading
… the influence of task and context on the semantic processing of single words in isolation and in a sentence context. In one study, I considered task effects on single-word semantic representations using multivariate pattern analysis. In two further studies, I tested whether sentence …
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The effect of phonological, semantic, and hybrid associates on accurate recall and false memories of adults who stutter : a preliminary study
There are data to suggest that the phonological representations of young children who stutter are less specified than their typically fluent peers. The purpose of the present study is to determine if this apparent difference in phonological encoding persists in adults who stutter. Utilizing a false …
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Synthetic News Radio : content filtering and delivery for broadcast audio news
… in an audio news broadcast, and it creates semantic representations that can match stories of similar content through audio-based queries. Current speech recognition technology cannot by itself produce enough information to accurately characterize news audio; therefore, the clustered text …
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The neuro-cognitive representation of word meaning resolved in space and time.
… complex multidimensional representation, called semantic representation, which corresponds to its meaning. Notwithstanding decades of neuropsychological and neuroimaging work on the cognitive and neural substrate of semantic representations, many questions are left unanswered. The research in …
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Meaning Apprehension in the Cerebral Hemispheres
… hemispheric differences in the breadth of semantic activation using ambiguous words that possess multiple incompatible meanings, and failed to show significant hemispheric differences in activating and maintaining multiple incompatible meanings. In experiments three and four, associated …
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A MEG investigation of lexical access in aphasia
… to arise from impaired phonological processing, semantic representations, or both. The present study examined spreading lexical activation in people with aphasia by implementing thorough clinical evaluation, a series of listening tasks, and a time sensitive means of tracking cortical activation. …
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Spatial provenance: A case study on geological carbon sequestration
… provenance information is tackled by exploiting semantic representations and database technologies to enable the comparison of alternative and/or historical iterations of spatial data processing workflows. Using a case study based on geological carbon sequestration research, this thesis examines …
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Building a similarity engine
… words nearby, the LSTM-RNN method, which forms semantic representations of sentences by learning more about the sentence as it iterates through a sentence, using single convolution neural networks, and several other methods. Using these theories, we are trying to build a Similarity Engine which …
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