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Articles 1 - 5 of 5
Full-Text Articles in Physical Sciences and Mathematics
Vascular Tree Structure: Fast Curvature Regularization And Validation, Egor Chesakov
Vascular Tree Structure: Fast Curvature Regularization And Validation, Egor Chesakov
Electronic Thesis and Dissertation Repository
This work addresses the challenging problem of accurate vessel structure analysis in high resolution 3D biomedical images. Typical segmentation methods fail on recent micro-CT data sets resolving near-capillary vessels due to limitations of standard first-order regularization models. While regularization is needed to address noise and partial volume issues in the data, we argue that extraction of thin tubular structures requires higher-order curvature-based regularization. There are no standard segmentation methods regularizing surface curvature in 3D that could be applied to large 3D volumes. However, we observe that standard measures for vessels structure are more concerned with topology, bifurcation angles, and other …
Clustering-Based Personalization, Seyed Nima Mirbakhsh
Clustering-Based Personalization, Seyed Nima Mirbakhsh
Electronic Thesis and Dissertation Repository
Recommendation systems have been the most emerging technology in the last decade as one of the key parts in e-commerce ecosystem. Businesses offer a wide variety of items and contents through different channels such as Internet, Smart TVs, Digital Screens, etc. The number of these items sometimes goes over millions for some businesses. Therefore, users can have trouble finding the products that they are looking for. Recommendation systems address this problem by providing powerful methods which enable users to filter through large information and product space based on their preferences. Moreover, users have different preferences. Thus, businesses can employ recommendation …
An Approach To Artificial Society Generation For Video Games, Bryan Sarlo
An Approach To Artificial Society Generation For Video Games, Bryan Sarlo
Electronic Thesis and Dissertation Repository
Since their inception in the 1940s, video games have always had a need for non-player characters (NPCs) driven by some form of artificial intelligence (AI). More recently, researchers and developers have attempted to create believable, or human-like, agents by modeling them after humans by borrowing concepts from the social sciences. This thesis explores an approach to generating a society of such believable agents with human-like attributes and social connections. This approach allows agents to form various kinds of relationships with other agents in the society, and even provides an introductory form of shared or influenced attributes based on their spouse …
Geological Object Recognition In Extraterrestrial Environments, Gregory M. Elfers
Geological Object Recognition In Extraterrestrial Environments, Gregory M. Elfers
Electronic Thesis and Dissertation Repository
On July 4 1997, the landing of NASA’s Pathnder probe and its rover Sojourner marked the beginning of a new era in space exploration; robots with the ability to move have made up the vanguard of human extraterrestrial exploration ever since. With Sojourners landing, for the rst time, a ground traversing robot was at a distance too far from earth to make direct human control practical. This has given rise to the development of autonomous systems to improve the e?ciency of these robots,in both their ability to move,and their ability to make decisions regarding their environment. Computer Vision comprises a …
A Real-Time N-Gram Approach To Choosing Synonyms Based On Context, Brian J. Moore
A Real-Time N-Gram Approach To Choosing Synonyms Based On Context, Brian J. Moore
Electronic Thesis and Dissertation Repository
Synonymy is an important part of all natural language but not all synonyms are created equal. Just because two words are synonymous, it usually doesn’t mean they can always be interchanged. The problem that we attempt to address is that of near-synonymy and choosing the right word based purely on its surrounding words. This new computational method, unlike previous methods used on this problem, is capable of making multiple word suggestions which more accurately models human choice. It contains a large number of words, does not require training, and is able to be run in real-time. On previous testing data, …