Full-Pose Estimation And Tracking Control For A Multi-Rotor Aircraft Package Exchange, 2019 Utah State University
Full-Pose Estimation And Tracking Control For A Multi-Rotor Aircraft Package Exchange, Trent P. Smith
All Graduate Theses and Dissertations
In this work, research to develop algorithms for a package exchange maneuver between two quad-rotor aircraft is presented. First, the development of tools used for this research is discussed. Second, a controller is designed that synchronizes the flight paths and motion of two quad-rotor robots. The controller is used to guide a designated follower quad-rotor to follow a leader aircraft’s position and orientation. The follower aircraft is equipped with a simple mechanical manipulator to compensate for limitations in the aircrafts maneuverability. finally, a sensor architecture study for relative navigation of Unmanned Aerial Vehicles (UAV) is presented. The architecture study ...
Toward Reliable, Secure, And Energy-Efficient Multi-Core System Design, 2019 Utah State University
Toward Reliable, Secure, And Energy-Efficient Multi-Core System Design, Prabal Basu
All Graduate Theses and Dissertations
Computer hardware researchers have perennially focussed on improving the performance of computers while stipulating the energy consumption under a strict budget. While several innovations over the years have led to high performance and energy efficient computers, more challenges have also emerged as a fallout. For example, smaller transistor devices in modern multi-core systems are afflicted with several reliability and security concerns, which were inconceivable even a decade ago. Tackling these bottlenecks happens to negatively impact the power and performance of the computers. This dissertation explores novel techniques to gracefully solve some of the pressing challenges of the modern computer design ...
Identification Of The Impacts Of Code Changes On The Security Of Software, 2019 Iowa State University
Identification Of The Impacts Of Code Changes On The Security Of Software, Moataz Abdelkhalek, Ameerah-Muhsina Jamil, Lotfi Ben Othmane
Lotfi ben Othmane
Companies develop their software in versions and iterations. Ensuring the security of each additional version using code review is costly and time consuming. This paper investigates automated tracing of the impacts of code changes on the security of a given software. To this end, we use call graphs to model the software code, and security assurance cases to model the security requirements of the software. Then we relate assurance case elements to code through the entry point methods of the software, creating a map of monitored security functions. This mapping allows to evaluate the security requirements that are affected by ...
Online Asynchronous Coded Caching, 2019 Iowa State University
Online Asynchronous Coded Caching, Hooshang Ghasemi, Aditya Ramamoorthy
Coded caching is a technique for reducing peak data rate in content delivery systems that employ caching. The original formulation of the coded caching problem assumes that the file requests from the users are synchronous, i.e., they arrive at the same time. In this work, we consider the asynchronous setting where the file requests are revealed to the server in an online fashion. We propose a novel online algorithm for this problem building on our prior work for the offline setting (where the server knows the request arrival times and deadlines in advance). Our simulation results demonstrate that our ...
Virtual Eye: A Spatial-Temporal Bottom-Up Eye Sensitivity Model, 2019 Purdue University
Virtual Eye: A Spatial-Temporal Bottom-Up Eye Sensitivity Model, Todd Goodall
Video quality and compression models use the
spatial contrast sensitivity function (CSF), which is solved
based on a linear system approximation. This function measures
the eye’s sensitivity to sinusoid gratings, ignoring the subtle
connectivity and inhomogeniety of cell density across the
visual field. Non-linear aspects of the eye, such as the change
in frequency sensitivity with changing illumination, are not
captured by this simple approximation. We propose Virtual
Eye, a bottom-up approach that models the spatio-temporal
dynamics of the eye across the visual field. Each functional
retinal cell layer in the eye is modeled using non-uniform spatial
cell responses ...
The Challenge For Vision Of Fluctuating Real-World Illumination, 2019 University of Manchester
The Challenge For Vision Of Fluctuating Real-World Illumination, David H. Foster
No abstract provided.
Design Of Dc-Link Vscf Ac Electrical Power System For The Embraer 190/195 Aircraft, 2019 ETEP – Faculdade de Tecnologia de São José dos Campos, Brazil
Design Of Dc-Link Vscf Ac Electrical Power System For The Embraer 190/195 Aircraft, Eduardo Francis Carvalho Freitas, Nihad E. Daidzic
Nihad E. Daidzic, Dr.-Ing., D.Sc., ATP, CFII, MEI
A proposed novel DC-Link VSCF AC-DC-AC electrical power system converter for Embraer 190/195 transport category airplane is presented. The proposed converter could replace the existing conventional system based on the CSCF IDGs. Several contemporary production airplanes already have VSCF as a major or backup source of electrical power. Problems existed with the older VSCF systems in the past; however, the switched power electronics and digital controllers have matured and can be now, in our opinion, safely integrated and replace existing constant-speed hydraulic transmissions powering CSCF AC generators. IGBT power transistors for medium-level power conversion and relatively fast efficient switching ...
Thermal And Orbital Analysis Of Darkness Cubesat, 2019 Olivet Nazarene University
Thermal And Orbital Analysis Of Darkness Cubesat, Katie Dickey
Honors Program Projects
Fermi National Accelerator Laboratory is sending a 3U CubeSat into LEO to search for a 3.5 keV photon corresponding to the decay of a theorized dark matter particle called the sterile neutrino. The CubeSat will encounter environmental variations while in orbit that can be computed through an orbital analysis using System’s Tool Kit. In order to minimize thermal noise readout, improve optical resolution, and increase bandwidth, the sensors must be kept below 170K while taking data. This temperature is difficult to achieve due to radiation from the Sun and the Earth’s albedo radiation. Through the thermal analysis ...
An Assessment Of The Decision Making Units’ Efficiency In Service Systems (The Case Of Cellular Telecom), 2019 Portland State University
An Assessment Of The Decision Making Units’ Efficiency In Service Systems (The Case Of Cellular Telecom), Maoloud Dabab, Timothy R. Anderson
Student Research Symposium
Most tools and models on performance and quality of service management are generic and do not solve the complex technical systems, which the most critical component on the network and where these tools should be applied. The objective of this research is to assess the cellular performance and Base Transceiver Station (BTS) efficiency by proposing a robust model that is derived from multiple Key Performance Indicators (KPIs) based on technical and financial aspects. The novelty of this research provides a comprehensive multidimensional model for tuning the BTS parameters, which can lead to developing a standard global mobile network KPI. The ...
Explanation Methods For Neural Networks, 2019 Portland State University
Explanation Methods For Neural Networks, Jack H. Chen, Christof Teuscher
Student Research Symposium
Neural Networks (NNs) have become a basis of almost all state-of-the-art machine learning algorithms and classifiers. While NNs have been shown to generalize well to real-world examples, researchers have struggled to show why they work on an intuitive level. We designed several methods to explain the decisions of two state-of-the-art NN classifiers, ResNet and an All-CNN, in the context of the Japanese Society of Radiological Technology (JSRT) lung nodule dataset and the CIFAR-10 image dataset. Leading explanation methods LIME and Grad-CAM generate variations of heat maps which represent the regions of the input determined salient by the NN. We analyze ...
Fly-By-Logic: A Tool For Unmanned Aircraft System Fleet Planning Using Temporal Logic, 2019 University of Pennsylvania
Fly-By-Logic: A Tool For Unmanned Aircraft System Fleet Planning Using Temporal Logic, Yash Vardhan Pant, Rhudii A. Quaye, Houssam Abbas, Akarsh Varre, Rahul Mangharam
Real-Time and Embedded Systems Lab (mLAB)
Safe planning for fleets of Unmaned Aircraft Systems (UAS) performing complex missions in urban environments has typically been a challenging problem. In the United States of America, the National Aeronautics and Space Administration (NASA) and the Federal Aviation Administration (FAA) have been studying the regulation of the airspace when multiple such fleets of autonomous UAS share the same airspace, outlined in the Concept of Operations document (ConOps). While the focus is on the infrastructure and management of the airspace, the Unmanned Aircraft System (UAS) Traffic Management (UTM) ConOps also outline a potential airspace reservation based system for operation where operators ...
Research Of Electro-Optical Effect In Metal Halide Perovskites By Fabry-Perot Interometer Method, 2019 Washington University in St. Louis
Research Of Electro-Optical Effect In Metal Halide Perovskites By Fabry-Perot Interometer Method, Hanxiang Yin
Engineering and Applied Science Theses & Dissertations
Perovskites have been investigated a lot by present and reported with outstanding optoelectronic properties. However, so far there is no publications about another important property, the electro-optical (EO) effect which is related to important applications in photolithography. This thesis is mainly mean to calculate the EO constants of one kind of organic perovskite material, CH3NH3PbI3, which has been reported to have good capability of forming film by spin-coating, through the way of putting the film of CH3NH3PbI3 between two layers of metal mirrors to build a Fabry-Perot interferometer and characterizing ...
Mitigating Energy Loss In A Robot Hopping On A Physically Emulated Dissipative Substrate, 2019 University of Pennsylvania
Mitigating Energy Loss In A Robot Hopping On A Physically Emulated Dissipative Substrate, Sonia F. Roberts, Daniel E. Koditschek
Departmental Papers (ESE)
We work with geoscientists studying erosion and desertification to improve the spatial and temporal resolution of their data collection over long transects in difficult realworld environments such as deserts. The Minitaur robot, which can run quickly over uneven terrain and use a single leg to measure relevant ground properties such as stiffness, is an attractive scout robot candidate for inclusion in a heterogeneous team in collaboration with a heavily geared, sensor-laden RHex. However, Minitaur is challenged by long-distance locomotion on sand dunes. Previous simulation results suggested that the energetic cost of transport can be mitigated by programming a virtual damping ...
A Systems Engineering Approach To Improving The National Weather Service, 2019 Loyola Marymount University
A Systems Engineering Approach To Improving The National Weather Service, Joanna Fregoso
LMU/LLS Theses and Dissertations
The National Weather Service (NWS) is responsible for ensuring that the U.S is a weather ready nation. The mission of the NWS focuses on protecting the lives and property of those in the U.S, while also enhancing the national economy. The number of high-impact weather events have increased over the past decades, suggesting a need for a more effective NWS. This paper focuses on improving the NWS by following the systems engineering approach and using system architecting principles.
Point Process Algorithm For The Estimation Of Bi-Directional Cardiorespiratory Interactions In Preterm Infants, 2019 University of Texas at Tyler
Point Process Algorithm For The Estimation Of Bi-Directional Cardiorespiratory Interactions In Preterm Infants, Selorm Darkey
Electrical Engineering Theses
Cardiorespiratory interactions tend to be frail in the early stages of life, necessitating the further analysis of their existence since this could turn out to be a significant factor in assessing the neurodevelopment of neonates. Strength of cardio-respiratory interactions are presumed to be weak and rapidly fluctuating in neonates. Even with the extensive significant research that have been dedicated to early human development there still isn’t a standard or specific technique to analyze these weak cardio-respiratory fluctuating characteristics in neonates. We employ a mathematical technique that’s based on series of tools that have been outstanding in measurement of ...
A Swimming Open-Water Navigation Assistive Headset And Receiver, 2019 Utah State University
A Swimming Open-Water Navigation Assistive Headset And Receiver, Zakk B. Rhodes
All Graduate Plan B and other Reports
Open water swimming is a common activity dating back to ancient times. One challenge with open water swimming is navigation because while maintaining proper swimming technique suggests the head be in the water, it is difficult to see where one is going. Thus swimmers must bring their head out of the water periodically to sight landmarks. This work describes a solution to this problem by a design for a GPS device to assist swimmers with navigation. The swimmer can plan their own route, send it to the device, and then be guided by the device. They then will not have ...
Granny Pod Virtual Assistant, 2019 University of Nebraska at Omaha
Granny Pod Virtual Assistant, David Connolly, Bing Chen
Dr. Chen is working on a sustainable small house (SSH) project, sometimes called the “Granny Pod”. Regulations will soon allow homeowners to house their parents on their property, which can be an opportunity live independently in a cheap, sustainable, and convenient alternative to a retirement community. To help achieve this vision, a Virtual Assistant system for the SSH was developed. The system uses a Google Home or Amazon Echo to respond to the voice command “Hey Google (or Alexa), I need help” by contacting the nearby homeowner or caretaker. It alerts the resident who is at the door when the ...
Design Of Remote Datalogger Connection And Live Data Tweeting System, 2019 University of Arkansas, Fayetteville
Design Of Remote Datalogger Connection And Live Data Tweeting System, Zachary Wofford
Biological and Agricultural Engineering Undergraduate Honors Theses
Low-Impact Development (LID) is an attempt to sustainably respond to the potential hazards posed by urban expansion. Green roofs are an example of LID design meant to reduce the amount of runoff from storm events that are becoming more intense and less predictable while also providing insulation to buildings. LID has not yet been widely adopted as it is often a more expensive alternative to conventional infrastructure (Bowman et. al., 2009). However, its benefits are apparent. The University of Arkansas Honors College awarded a grant to research the large green roof atop Hillside Auditorium. One part of this grant is ...
Public Utilities' Disaster Response And Management Plans: An Evaluation Of National Grid And New York State Electric & Gas, 2019 State University of New York College at Buffalo - Buffalo State College
Public Utilities' Disaster Response And Management Plans: An Evaluation Of National Grid And New York State Electric & Gas, Taylor N. Vishion
Public Administration Master’s Projects
Societal dependence on electricity has rapidly increased as technological advancement has occurred, thus requiring electric utilities to advance their emergency response and repair procedures. Disaster management and response is a relatively new field for electric utilities, and despite the adoption of the Incident Command System created by FEMA, there are still opportunities for all utilities to improve. This project aims to assess the disaster response and management procedures of National Grid U.S. and NYSEG and identify opportunities for improvement. This study interviewed emergency management professionals experienced with electric utilities and found both National Grid U.S. and NYSEG can ...
Torch Mounted Wire Nipper, 2019 University of Tennessee, Knoxville
Torch Mounted Wire Nipper, Steven D. Patrick, Matt Montgomery, Ben Rouse, Garrett D. Foust
Chancellor’s Honors Program Projects
No abstract provided.