Research papers
5,883 papers · NASA NTRS, NTSB, FAA CAMI
NASA NTRS · 1,269 NTSB Safety Studies · 12 NTSB Aircraft Accident Reports · 17 Embry-Riddle Scholarly Commons · 1,993
5,883 matches
- arXiv 2020 ARXIV arXiv preprint
Effect of particle inertia on the alignment of small ice crystals in turbulent clouds
Small non-spherical particles settling in a quiescent fluid tend to orient so that their broad side faces down, because this is a stable fixed point of their angular dynamics at small particle Reynolds number.
- NASA NTRS 2020 ARC Technical Memorandum (TM)
Deep Space Human-Systems Research Recommendations for Future Human-Automation/Robotic Integration
Appropriate integration between automation and robotics systems and their human operators is essential for future space exploration. The Human Factors and Behavioral Performance Element of NASA’s Human Research Program r…
- NASA NTRS 2020 LaRC Conference Paper
Alert Timing Assessment for Unmanned Aircraft System Terminal Area Operations
A Detect and Avoid (DAA) system is an essential enabler for integrating Unmanned Aircraft Systems (UAS) into the U.S. National Airspace System.
- arXiv 2020 ARXIV arXiv preprint
SAR image wave spectra to retrieve the thickness of grease-pancake sea ice using viscous wave models
Young sea ice composed of grease and pancake ice (GPI), as well as thin floes, considered to be the most common form of sea ice fringing Antarctica, is now becoming the 'new normal' also in the Arctic.
- arXiv 2020 ARXIV arXiv preprint
Developmental Reinforcement Learning of Control Policy of a Quadcopter UAV with Thrust Vectoring Rotors
In this paper, we present a novel developmental reinforcement learning-based controller for a quadcopter with thrust vectoring capabilities. This multirotor UAV design has tilt-enabled rotors.
- arXiv 2020 ARXIV arXiv preprint
Dynamics of collision of a spherical ice crystal particle with a perfectly rigid substrate
Impact of single particle onto a rigid substrate leads to its deformation and fragmentation. The flow associated with the particle spreading on a solid substrate after impact is extremely complicated.
- arXiv 2020 ARXIV arXiv preprint
A pole-to-equator ocean overturning circulation on Enceladus
Enceladus is believed to have a saltwater global ocean with a mean depth of at least 30~km, heated from below at the ocean-core interface and cooled at the top, where the ocean loses heat to the icy lithosphere above.
- Semantic Scholar 2020 Article (Western Journal of Nursing Research)
Brief Workplace Interventions Addressing Burnout, Compassion Fatigue, and Teamwork: A Pilot Study
Burnout and compassion fatigue are problematic for nurses, patients, and organizations. Identifying brief interventions nurses can engage in while at work to address compassion fatigue, burnout, and teamwork, as burnout …
- arXiv 2020 ARXIV arXiv preprint
Universal Battery Performance and Degradation Model for Electric Aircraft
Development of Urban Air Mobility (UAM) concepts has been primarily focused on electric vertical takeoff and landing aircraft (eVTOLs), small aircraft which can land and takeoff vertically, and which are powered by recha…
- NASA NTRS 2020 JSC Accepted Manuscript (Version with final changes)
International Space Station (ISS) Thruster Plume Contamination and Erosion Control for Visiting Spacecraft
The ISS is the largest and most complex platform for space science utilization in low Earth orbit. Multiple sites for external payloads, with exposure to the associated natural and induced environments, are available to …
- arXiv 2020 ARXIV arXiv preprint
Virtual Testbed for Monocular Visual Navigation of Small Unmanned Aircraft Systems
Monocular visual navigation methods have seen significant advances in the last decade, recently producing several real-time solutions for autonomously navigating small unmanned aircraft systems without relying on GPS.
- Semantic Scholar 2020 Article (Journal of Intellectual Disability Research)
A randomised clinical pilot trial to test the effectiveness of parent training with video modelling to improve functioning and symptoms in children with autism spectrum disorders and intellectual disability.
BACKGROUND Poor eye contact and joint attention are early signs of autism spectrum disorder (ASD) and important prerequisites for developing other socio-communicative skills.
- arXiv 2020 ARXIV arXiv preprint
Using an Automated Heterogeneous Robotic System for Radiation Surveys
During missions involving radiation exposure, unmanned robotic platforms may embody a valuable tool, especially thanks to their capability of replacing human operators in certain tasks to eliminate the health risks assoc…
- arXiv 2020 ARXIV arXiv preprint
Quaternion Feedback Based Autonomous Control of a Quadcopter UAV with Thrust Vectoring Rotors
In this paper, we present an autonomous flight controller for a quadcopter with thrust vectoring capabilities. This UAV falls in the category of multirotors with tilt-motion enabled rotors.
- Semantic Scholar 2020 Article (Behaviour Research and Therapy)
Effectiveness of a transdiagnostic group intervention to enhance emotion regulation in young Afghan refugees: A pilot randomized controlled study.
There are several challenges to providing mental health care for refugees, including high comorbidity and structural barriers. Targeting transdiagnostic processes in a low-threshold group intervention appears particularl…
- arXiv 2020 ARXIV arXiv preprint
Energy Minimization in UAV-Aided Networks: Actor-Critic Learning for Constrained Scheduling Optimization
In unmanned aerial vehicle (UAV) applications, the UAV's limited energy supply and storage have triggered the development of intelligent energy-conserving scheduling solutions.
- arXiv 2020 ARXIV arXiv preprint
Machine Learning-Assisted UAV Operations with UTM: Requirements, Challenges, and Solutions
Unmanned aerial vehicles (UAVs) are emerging in commercial spaces and will support many applications and services, such as smart agriculture, dynamic network deployment, and network coverage extension, surveillance and s…
- arXiv 2020 ARXIV arXiv preprint
Learning-to-Fly: Learning-based Collision Avoidance for Scalable Urban Air Mobility
With increasing urban population, there is global interest in Urban Air Mobility (UAM), where hundreds of autonomous Unmanned Aircraft Systems (UAS) execute missions in the airspace above cities.
- Semantic Scholar 2020 Article (Archives of Physical Medicine and Rehabilitation)
Effectiveness of high-intensity interval training versus moderate-intensity continuous training in patients with fibromyalgia: A pilot randomized controlled trial.
OBJECTIVE To compare the effects of high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) combined with strengthening and stretching exercises in patients with fibromyalgia.
- arXiv 2020 ARXIV arXiv preprint
Gasdynamic Flow Control by Superfast Local Heating in a Strongly Nonequilibrium Pulse Plasma
Paper presents a review of modern works on the gasdynamic flow control using a heat release in highly nonequilibrium pulsed plasma. The major attention is paid to the effects based on ultrafast (on nanosecond time scale …
- arXiv 2020 ARXIV arXiv preprint
Modeling and Optimal Control of Hybrid UAVs with Wind Disturbance
This paper addresses modeling and control of a six-degree-of-freedom unmanned aerial vehicle capable of vertical take-off and landing in the presence of wind disturbances.
- arXiv 2020 ARXIV arXiv preprint
Verification Framework for Control System Functionality of Unmanned Aerial Vehicles
A control system verification framework is presented for unmanned aerial vehicles using theorem proving. The framework's aim is to set out a procedure for proving that the mathematically designed control system of the ai…
- arXiv 2020 ARXIV arXiv preprint
Recommendations for Emerging Air Taxi Network Operations based on Online Review Analysis of Helicopter Services
The effects of traffic congestion are adverse, primarily including air pollution, commuter stress, and an increase in vehicle operating costs and accidents on the road.
- Semantic Scholar 2020 Article (Frontiers in Neurology)
Dynamic Stability and Trunk Control Improvements Following Robotic Balance and Core Stability Training in Chronic Stroke Survivors: A Pilot Study
Stroke survivors show greater postural oscillations and altered muscular activation compared to healthy controls. This results in difficulties in walking and standing, and in an increased risk of falls.
- arXiv 2020 ARXIV arXiv preprint
Coordinated Control of UAVs for Human-Centered Active Sensing of Wildfires
Fighting wildfires is a precarious task, imperiling the lives of engaging firefighters and those who reside in the fire's path. Firefighters need online and dynamic observation of the firefront to anticipate a wildfire's…
- Semantic Scholar 2020 Article (The International Journal of Aerospace Psychology)
The Effectiveness of a Mnemonic-Type Startle and Surprise Management Procedure for Pilots
ABSTRACT Background: Mnemonic-type startle and surprise procedures were previously proposed to help pilots cope with startle and surprise in-flight, but effects on performance after procedure execution have not yet been …
- Semantic Scholar 2020 Article (AIAA AVIATION 2020 FORUM)
Explainable Artificial Intelligence for Aviation Safety Applications
- Semantic Scholar 2020 Article (AIAA AVIATION 2020 FORUM)
A Supervised Learning Approach for Safety Event Precursor Identification in Commercial Aviation
- arXiv 2020 ARXIV arXiv preprint
Bedrock reconstruction from free surface data for unidirectional glacier flow with basal slip
Glacier ice flow is shaped and defined by several properties, including the bedrock elevation profile and the basal slip distribution. The effect of these two basal properties can present in similar ways in the surface.
- Semantic Scholar 2020 Article (Aerospace)
Critical Parameter Identification for Safety Events in Commercial Aviation Using Machine Learning
In recent years, there has been a rapid growth in the application of data science techniques that leverage aviation data collected from commercial airline operations to improve safety.
- arXiv 2020 ARXIV arXiv preprint
Energy-Efficient Cyclical Trajectory Design for UAV-Aided Maritime Data Collection in Wind
Unmanned aerial vehicles (UAVs), especially fixed-wing ones that withstand strong winds, have great potential for oceanic exploration and research.
- arXiv 2020 ARXIV arXiv preprint
Effect of axially varying sandpaper roughness on bubbly drag reduction in Taylor-Couette turbulence
We experimentally investigate the influence of alternating rough and smooth walls on bubbly drag reduction (DR). We apply rough sandpaper bands of width $s$ between $48.4\,mm$ and $148.5\,mm$, and roughness height $k = 6…
- Semantic Scholar 2020 Article (Journal of Physics: Conference Series)
Comparison of Detection Technology for Runway Incursion Prevention in Airport Hot Spot
The prevention of runway incursion in hot spot of airports has always been one of the research hot spots in the field of international civil aviation.
- arXiv 2020 ARXIV arXiv preprint
Fusion of Real Time Thermal Image and 1D/2D/3D Depth Laser Readings for Remote Thermal Sensing in Industrial Plants by Means of UAVs and/or Robots
This paper presents fast procedures for thermal infrared remote sensing in dark, GPS-denied environments, such as those found in industrial plants such as in High-Voltage Direct Current (HVDC) converter stations.
- NASA NTRS 2020 GRC Conference Paper
Scroll Pump Dust Tolerance Test for Martian Atomospheric Acquisition
The ability to generate oxygen on the Martian surface will be essential to establishing a human presence on Mars. Flow generating devices such as pumps, compressors, and blowers will be essential components in Martian at…
- Semantic Scholar 2020 Article (International Journal of Managerial Finance)
Financial performance and safety in the aviation industry
PurposeThis paper investigates whether financial factors, which are presumed to influence an airline's maintenance, purchasing, and training policies, are associated with the air carrier's safety performance.Design/metho…
- arXiv 2020 ARXIV arXiv preprint
Optimal control of nonlinear systems with unsymmetrical input constraints and its applications to the UAV circumnavigation problem
In this paper, a novel design scheme is introduced to solve the optimal control problem for nonlinear systems with unsymmetrical and state-dependent input constraints.
- arXiv 2020 ARXIV arXiv preprint
Multiple Access in Aerial Networks: From Orthogonal and Non-Orthogonal to Rate-Splitting
Recently, interest on the utilization of unmanned aerial vehicles (UAVs) has aroused. Specifically, UAVs can be used in cellular networks as aerial users for delivery, surveillance, rescue search, or as an aerial base st…
- arXiv 2020 ARXIV arXiv preprint
A Comprehensive Survey of Control Strategies for Autonomous Quadrotors
Over the past several decades there has been a constant increase in the use of Unmanned Aerial Systems (UAS). Hence, there has also been a growth in the number of control algorithms to service the many applications embod…
- arXiv 2020 ARXIV arXiv preprint
An Incremental Clustering Method for Anomaly Detection in Flight Data
Safety is a top priority for civil aviation. New anomaly detection methods, primarily clustering methods, have been developed to monitor pilot operations and detect any risks from such flight data.
- arXiv 2020 ARXIV arXiv preprint
Cooperative Navigation Using Pairwise Communication with Ranging and Magnetic Anomaly Measurements
The problem of cooperative localization for a small group of Unmanned Aerial Vehicles (UAVs) in a GNSS denied environment is addressed in this paper.
- arXiv 2020 ARXIV arXiv preprint
Measures and LMIs for Adaptive Control Validation
Occupation measures and linear matrix inequality (LMI) relax-ations (called the moment sums of squares or Lasserre hierarchy) have been used previously as a means for solving control law verification and validation (VV) …
- arXiv 2020 ARXIV arXiv preprint
An Energy-Efficient Event-Based MIMO Communication Scheme for UAV Formation Control
We consider a leader-follower formation control setup as an example for a multi-agent networked control system (NCS). This paper proposes an event-based wireless communication scheme with a MIMO precoder, that dynamicall…
- arXiv 2020 ARXIV arXiv preprint
Fast Increase of Nanofluidic Slip in Supercooled Water: the Key Role of Dynamics
Nanofluidics is an emerging field offering innovative solutions for energy harvesting and desalination. The efficiency of these applications depends strongly on liquid-solid slip, arising from a favorable ratio between v…
- arXiv 2020 ARXIV arXiv preprint
Safety Constrained Multi-UAV Time Coordination: A Bi-level Control Framework in GPS Denied Environment
Unmanned aerial vehicles (UAVs) suffer from sensor drifts in GPS denied environments, which can cause safety issues. To avoid intolerable sensor drifts while completing the time-critical coordination task for multi-UAV s…
- arXiv 2020 ARXIV arXiv preprint
UAVs as Mobile Base Stations
The research presented here has been conducted as part of professor Fabrizion Granelli's course "Advanced Network Modeling and Design" at UniTn and regards the use of drones as mobile base stations.
- arXiv 2020 ARXIV arXiv preprint
Continuation Method with the Trusty Time-stepping Scheme for Linearly Constrained Optimization with Noisy Data
The nonlinear optimization problem with linear constraints has many applications in engineering fields such as the visual-inertial navigation and localization of an unmanned aerial vehicle maintaining the horizontal flig…
- arXiv 2020 ARXIV arXiv preprint
Flight Time Prediction for Fuel Loading Decisions with a Deep Learning Approach
Under increasing economic and environmental pressure, airlines are constantly seeking new technologies and optimizing flight operations to reduce fuel consumption.
- arXiv 2020 ARXIV arXiv preprint
Inertial torque on a small spheroid in a stationary uniform flow
How anisotropic particles rotate and orient in a flow depends on the hydrodynamic torque they experience. Here we compute the torque acting on a small spheroid in a uniform flow by numerically solving the Navier-Stokes e…
- NASA NTRS 2020 ARC Accepted Manuscript (Version with final changes)
Tactical Separation and Safety Alerting System for Terminal Airspace
Provision of tactical alerts to aid air traffic controllers in providing separation assurance in terminal airspace is hindered by the complexity of the airspace, its operations, and flight procedures.