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Articles 1 - 8 of 8
Full-Text Articles in Computer Engineering
Dachash: A Dynamic, Cache-Aware And Concurrent Hash Table On Gpus, Hao Zhou
Dachash: A Dynamic, Cache-Aware And Concurrent Hash Table On Gpus, Hao Zhou
Electronic Theses and Dissertations
GPU acceleration of hash tables in high-volume transaction applications such as computational geometry and bio-informatics are emerging. Recently, several hash table designs have been proposed on GPUs, but our analysis shows that they still do not adequately factor in several important aspects of a GPU’s execution environment, leaving large room forfurther optimization.
A Novel Approach Toward High Accuracy Indoor Localization}{Masters Of Science, Yunshu Wang
A Novel Approach Toward High Accuracy Indoor Localization}{Masters Of Science, Yunshu Wang
Electronic Theses and Dissertations
This thesis presents a novel approach towards high accuracy indoor localization with smartphones. Better than all the existing indoor localization methods, our approach has the advantage of being infrastructural-free, robust, and it does not require any pre-installation in a new environment. To make this goal come true, we built a testbed that only uses the Inertial Measurement Units (IMU) of the smartphones to access the smartphones' raw acceleration and orientation data, then use these data to calculate the user's location by coordinate transformation and interactions. We conducted extensive experiments and evaluations for testbed validation as well as to carefully examine …
Understanding Depression During The Covid-19 Pandemic Through Social Media Data, Nusrat Armin
Understanding Depression During The Covid-19 Pandemic Through Social Media Data, Nusrat Armin
Electronic Theses and Dissertations
The COVID-19 pandemic has dramatically affected peoples’ daily lives all over theworld - physically, economically, and emotionally. Due to the virus, many people have died, and many hospitalized. A record number of people have lost their job, and many businesses have closed. The global economy is at risk. People are facing new realities of their lives. Studies have shown that the level of depression is three times higher than before this pandemic. Previous studies have shown that people use social media to express their emotions and feelings. The purpose of this study is to understand the depression during this COVID-19 …
Localization And Mapping Of Unknown Locations And Tunnels With Unmanned Ground Vehicles, Doris Turnage
Localization And Mapping Of Unknown Locations And Tunnels With Unmanned Ground Vehicles, Doris Turnage
Electronic Theses and Dissertations
The main goals of this research were to enhance a commercial off the shelf (COTS) software platform to support unmanned ground vehicles (UGVs) exploring the complex environment of tunnels, to test the platform within a simulation environment, and to validate the architecture through field testing. Developing this platform will enhance the U. S. Army Engineering Research and Development Center’s (ERDC’s) current capabilities and create a safe and efficient autonomous vehicle to perform the following functions within tunnels: (1) localization (e.g., position tracking) and mapping of its environment, (2) traversing varied terrains, (3) sensing the environment for objects of interest, and …
Dynamic Thermal Management Of Vertically Stacked Heterogeneous Processors, Ajay Sharma
Dynamic Thermal Management Of Vertically Stacked Heterogeneous Processors, Ajay Sharma
Electronic Theses and Dissertations
No abstract provided.
Virtual Worlds And Conservational Channel Evolution And Pollutant Transport Systems (Concepts), Chenchutta Denaye Jackson
Virtual Worlds And Conservational Channel Evolution And Pollutant Transport Systems (Concepts), Chenchutta Denaye Jackson
Electronic Theses and Dissertations
Many models exist that predict channel morphology. Channel morphology is defined as the change in geometric parameters of a river. Channel morphology is affected by many factors. Some of these factors are caused either by man or by nature. To combat the adverse effects that man and nature may cause to a water system, scientists and engineers develop stream rehabilitation plans. Stream rehabilitation as defined by Shields et al., states that "restoration is the return from a degraded ecosystem back to a close approximation of its remaining natural potential" [Shields et al., 2003]. Engineers construct plans that will restore streams …
Using Eye Tracking And Attention Maps In Computer Science Education, Austin Pernell
Using Eye Tracking And Attention Maps In Computer Science Education, Austin Pernell
Electronic Theses and Dissertations
Eye tracking has been used for many different areas of study where a user's eye movements are considered the most important information available. Before eye tracking was possible, the only way that information could be obtained was to ask the user where they looked and what caught their attention. Now, with the rise of eye tracking cameras, this data can be captured, stored, and processed in a meaningful way. These cameras aren't perfectly accurate however and there is still some interpretation that must be applied to more accurately represent the true gaze path of the user. This paper establishes some …
Implementation Of Multiple-Instance Learning In Drug Activity Prediction, Gang Fu
Implementation Of Multiple-Instance Learning In Drug Activity Prediction, Gang Fu
Electronic Theses and Dissertations
In the context of drug discovery and development, much effort has been exerted to determine which conformers of a given molecule are responsible for the observed biological activity. In this work we aimed to predict bioactive conformers using a variant of supervised learning, named multiple-instance learning. A single molecule, treated as a bag of conformers, is biologically active if and only if at least one of its conformers, treated as an instance, is responsible for the observed bioactivity; and a molecule is inactive if none of its conformers is responsible for the observed bioactivity. The implementation requires instance-based embedding, and …