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 24 for “"Semantic gap"”.
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Toward Bridging the Semantic Gap Between x86-64 Software Binaries and Abstract Languages for Formal Verification and Security
… level (e.g., C++, Java, Python), as the language semantics are more amenable to use by mathematical libraries. However, this approach comes with limitations. Firstly, not all software has source code. Secondly, the source code may be unavailable for licensing reasons. Thirdly, even if the source …
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Fighting phishing at the user interface
… online at those fake web sites. Phishing is a semantic attack. The fundamental problem of phishing is that when a user submits sensitive information online under an attack, his mental model about this submission is different from the system model that actually performs this submission. …
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Bridging Sensor Data Streams and Human Knowledge
… standing problem in computer science called the Semantic Gap Problem. It was originally defined in the research area of image processing as "... the lack of coincidence between the information that one can extract from the visual data and the interpretation that the same data have for a user in a …
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Hybrid models for combination of visual and textual features in context-based image retrieval.
… information search systems. This is due to the semantic gap, the difference between human perception (information needs) and the machine representation of multimedia objects. Most existing image retrieval systems are monomodal, as they utilize only visual or only textual information about …
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Bridging the gap: Applying machine learning techniques in digital forensics
… face a significant challenge known as the ”semantic gap,” which arises from the need to infer high-level system information from low-level data such as physical memory and CPU registers. This dissertation explores using machine learning to bridge the semantic gap in FMA and VMI applications. …
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Instruction Set Design for Support of High-Level Languages
… languages (HLLs) in mind. The resulting semantic gap is known to cause significant inefficiencies in space and time resources in execution. Direct interpretation of HLLs is not the solution, because it is too complex and inefficient. The alternative is to precede the interpretation phase …
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Content -Based Access of Image and Video Data
… video data. The main objective is to bridge the semantic gap between high-level concepts in the human mind and low-level features extractable by the machines. An emphasis is put on the learning and classification aspect during the interactive retrieval process, namely, relevance feedback …
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Knowledge driven approaches to e-learning recommendation.
… in teaching materials. This challenge causes a semantic gap. Learners lack sufficient knowledge about the domain they are trying to learn about, so are unable to assemble effective keywords that identify what they wish to learn. This problem presents an intent gap. The work presented in this …
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Enhancing HPC on Virtual Systems in Clouds through Optimizing Virtual Overlay Networks
… guest data buffers during encapsulation, and the semantic gap between virtual Ethernet features and underlying physical network features. I propose three novel optimizations in response: optimistic timer- free virtual interrupt injection, zero-copy cut-through data forwarding, and virtual TCP …
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Visual Element Property Graphs for Bridging the Symbol Description-Recognition Gap
This thesis addresses the semantic gap between visual perception and functional significance of symbols used in road vehicles. It presents a novel approach that enables users to identify and understand automotive symbols by describing what they visually perceive, translating visual descriptions …
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Toward ontological visual understanding
… knowledge is one of the main reasons that the semantic gap still remains when it comes to automatic multimedia understanding. One difference between the human cognition system and state-of-the-art machine vision algorithms is that the former possesses and uses high-level semantic knowledge, or …
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Selective Dynamic Analysis of Virtualized Whole-System Guest Environments
… more of: prohibitive performance degradation, a semantic gap between the analysis code and the execution under analysis, architecture/OS specificity, being user-mode only, and lacking flexibility and extendability. This dissertation describes the design of the Dynamic Executable Code Analysis …
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Transparent and Precise Malware Analysis Using Virtualization: From Theory to Practice
… based malware analysis is the loss of semantic information, also known as the <em>semantic gap</em> problem. To put it differently, since analysis takes place at the virtual machine monitor where only the raw system state (e.g., CPU and memory) is visible, higher level constructs such …
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Similarity learning in the era of big data
… similarity by bridging the so-called “semantic gap”? 4) User wants and needs, and item characteristics, are continuously evolving, which generates data at an unprecedented rate; how to model the nature of temporal dynamics in principle and provide timely decision makings? The goal of …
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CATCloud: closing semantic gaps of CPU interfaces for precise autoscaling in the cloud
… CATCloud, an OS extension that closes the semantic gap of cloud CPU allocation. CATCloud views CPU resources as a shared bandwidth interface and implements a millisecond-scale CPU bandwidth autotuner for quota and periodicity. Implemented in the OS scheduler, CATCloud realizes observability …
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CATCloud: closing semantic gaps of CPU interfaces for precise autoscaling in the cloud
… CATCloud, an OS extension that closes the semantic gap of cloud CPU allocation. CATCloud views CPU resources as a shared bandwidth interface and implements a millisecond-scale CPU bandwidth autotuner for quota and periodicity. Implemented in the OS scheduler, CATCloud realizes observability …
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Context-based multimedia semantics modelling and representation
… decisions. Existing methods for multimedia semantic understanding are limited to the computable low-level features; which raises the question of how to identify and represent the high-level semantic knowledge in multimedia resources.In order to bridge the semantic gap between multimedia …
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Scaling synchronization primitives
… suffer from various preemption issues due to a semantic gap between the hypervisor scheduler and a virtual machine scheduler—the double scheduling problem. We address this problem by bridging this gap, in which both the hypervisor and virtual machines share minimal scheduling information to …
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Low-Level Static Analysis for Memory Usage and Control Flow Recovery
… operating on the assembly level due to the semantic gap between high-level languages and the code that processors actually execute. Automated methods, such as model checking, would not be able to handle many interesting functions due to the undecidability of memory usage. Fully-interactive …
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FROM USER-GENERATED-CONTENT TO STRUCTURED KNOWLEDGE EXPLORING MULTI-ASPECT SENTENCE REPRESENTATION AND PROTOTYPE HIERARCHY BASED CATEGORIZATION FOR ORGANIZATION OF TEXT COLLECTIONS
… from the aspects of lexical importance, lexical semantic gap reduction, and syntactic relation. This multi-aspect representation well captures the similarity between a pair of sentences and passages and articles. Second, a novel prototype hierarchy-based categorization (PHC) framework is proposed …
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