Transportation and Mobility Management Commons^™

Six-Degree-Of-Freedom Optimal Feedback Control Of Pinpoint Landing Using Deep Neural Networks, Omkar S. Mulekar, Hancheol Cho, Riccardo Bevilacqua

Student Works

Machine learning regression techniques have shown success at feedback control to perform near-optimal pinpoint landings for low fidelity formulations (e.g. 3 degree-of-freedom). Trajectories from these low-fidelity landing formulations have been used in imitation learning techniques to train deep neural network policies to replicate these optimal landings in closed loop. This study details the development of a near-optimal, neural network feedback controller for a 6 degree-of-freedom pinpoint landing system. To model disturbances, the problem is cast as either a multi-phase optimal control problem or a triple single-phase optimal control problem to generate examples of optimal control through the presence of disturbances. …

Stability Of Deep Neural Networks For Feedback-Optimal Pinpoint Landings, Omkar S. Mulekar, Hancheol Cho, Riccardo Bevilacqua

Student Works

The ability to certify systems driven by neural networks is crucial for future rollouts of machine learning technologies in aerospace applications. In this study, the neural networks are used to represent a fuel-optimal feedback controller for two different 3-degree-of-freedom pinpoint landing problems. It is shown that the standard sum-ofsquares Lyapunov candidate is too restrictive to assess the stability of systems with fuel-optimal control profiles. Instead, a parametric Lyapunov candidate (i.e. a neural network) can be trained to sufficiently evaluate the closed-loop stability of fuel-optimal control profiles. Then, a stability-constrained imitation learning method is applied, which simultaneously trains a neural network …

Metropolitan Transportation Commission Discretionary Transit Funding Methods Evaluation, Christopher E. Ferrell, John M. Eells, David Reinke, Richard Lee

Mineta Transportation Institute Publications

In 2021, the Santa Clara Valley Transportation Authority (VTA) approached the Mineta Transportation Institute (MTI) with a proposal to have MTI provide an evaluation of the Metropolitan Transportation Commission’s (MTC’s) operational discretionary funding allocation policies and methods for Bay Area transit operators. The research was done in two parts. Part 1 investigated MTC’s past and current allocation methods for discretionary operational transit funding programs; Part 2 involved the evaluation of outcomes if MTC employed alternative allocation methods. After the Part 1 review of MTC’s various transit funding programs, the federal pandemic relief funds and the Transportation Development Act/State Transit Assistance …

Predicting Dynamic Fragmentation Characteristics From High-Impact Energy Events Utilizing Terrestrial Static Arena Test Data And Machine Learning, Katharine Larsen, Riccardo Bevilacqua, Omkar S. Mulekar, Elisabetta L. Jerome, Thomas J. Hatch-Aguilar

Student Works

To continue space operations with the increasing space debris, accurate characterization of fragment fly-out properties from hypervelocity impacts is essential. However, with limited realistic experimentation and the need for data, available static arena test data, collected utilizing a novel stereoscopic imaging technique, is the primary dataset for this paper. This research leverages machine learning methodologies to predict fragmentation characteristics using combined data from this imaging technique and simulations, produced considering dynamic impact conditions. Gaussian mixture models (GMMs), fit via expectation maximization (EM), are used to model fragment track intersections on a defined surface of intersection. After modeling the fragment distributions, …

Sharing Economy Last Mile Delivery: Three Essays Addressing Operational Challenges, Customer Expectations, And Supply Uncertainty, Nicolò Masorgo

Graduate Theses and Dissertations

Last mile delivery has become a critical competitive dimension facing retail supply chains. At the same time, the emergence of sharing economy platforms has introduced unique operational challenges and benefits that enable and inhibit retailers’ last mile delivery goals. This dissertation investigates key challenges faced by crowdshipping platforms used in last mile delivery related to crowdsourced delivery drivers, driver-customer interaction, and customer expectations. We investigate the research questions of this dissertation through a multi-method design approach, complementing a rich archival dataset comprised of several million orders retrieved from a Fortune 100 retail crowdshipping platform, with scenario-based experiments. Specifically, the first …

Economic Evaluation Of Route Choice Characteristics For Company Truck Drivers And Owner-Operator Truck Drivers In Southern California Freeways, Joseph J. Kim, Jose Alejandro Arroyo Turcios

Mineta Transportation Institute Publications

To contribute to the understanding of freeway capacity and financing options, this study evaluates the demand for truck-only toll lanes on Southern California freeways. The study implemented surveys to both company truck drivers and owner-operator truck drivers to estimate the value they place on time, reliability, and safety measures. The research team met face-to-face with both types of truck drivers near the Ports of Los Angeles and Long Beach to understand the drivers’ perspectives regarding truck-only toll lanes on Southern California freeways. A data set containing 45 surveys out of 62 survey responses were used for statistical analysis. The results …

Connecting Eastern And Western Massachusetts With High Speed Rail, Mary Piecewicz, An Pham

School of Professional Studies

No abstract provided.

Estimating The Economic And Health Benefits Of Bicycling In Northwest Arkansas, Mervin Jebaraj

Publications and Presentations

Over the past year, the Center for Business and Economic Research in the Sam M. Walton College of Business at the University of Arkansas conducted an analysis of the economic and health benefits of bicycling in Northwest Arkansas. The study was commissioned by the Walton Family Foundation and built on a previous study completed in 2018. The data and analysis presented in this study will inform regional and state policymakers, funders, and other community stakeholders about the overall return-on-investment from the significant investments in the bicycling ecosystem in Northwest Arkansas.

Investigating The Effect Of Knowledge Of Environmental Implications On Generation Z Vehicle Choice In Last Mile Delivery Service, Mitchelle Atungulu

Supply Chain Management Undergraduate Honors Theses

Consumer knowledge has a significant impact on consumer behavior and choice, where specific types of knowledge influences consumer shopping and purchasing decisions. As concerns about the environment and businesses operations’ effect on the environment grows, there has been various calls for facilitating increased consumer awareness on environmental issues; with the intent of this knowledge serving to influence consumer decision making in a manner that is viewed as favorable for environmental sustainability. With the substantial growth of ecommerce, one of the decisions that consumers more frequently make is that of delivery service choice as they make online purchase transactions. Various aspects …

Union Pacific Strategic Audit, Maureen O'Hara

Honors Theses

Union Pacific is the largest domestic railroad in the United States, responsible for nearly all of the rail-based shipping in the 23 states making up the Western two-thirds of the country. The company provides a crucial link in the global supply chain. By utilizing internal and external analysis tools, this report seeks to understand how Union Pacific’s business model and strategies have led them to create and sustain competitive advantages against other big competitors in the transportation industry. The analysis utilizes tools such as PESTLE, Porter’s Five Forces, and SWOT analyses. Following the application of the analysis, strategic recommendations are …

Improving Safety Service Patrol Performance, Mecit Cetin, Hong Yang, Kun Xie, Sherif Ishak, Guocong Zhai, Junqing Wang, Giridhar Kattepogu

Civil & Environmental Engineering Faculty Publications

Safety Service Patrols (SSPs) provide motorists with assistance free of charge on most freeways and some key primary roads in Virginia. This research project is focused on developing a tool to help the Virginia Department of Transportation (VDOT) optimize SSP routes and schedules (hereafter called SSP-OPT). The computational tool, SSP-OPT, takes readily available data (e.g., corridor and segment lengths, turnaround points, average annual daily traffic) and outputs potential SSP configurations that meet the desired criteria and produce the best possible performance metrics for a given corridor. At a high level, the main components of the developed tool include capabilities to: …

Single Pilot Operations And Public Acceptance: A Mixed Methods Study Conducted In Greece, Panagiotis Kioulepoglou, Ilias Makris

International Journal of Aviation, Aeronautics, and Aerospace

The airline industry is moving towards Single Pilot Operations (SPO), as a result of the increased training and salary cost of pilots, and also as a remedy to the impending pilot shortage which is estimated to manifest itself in the years to follow. The main objective of this study was to explore whether the Greek public is willing to accept only one pilot onboard, what are the factors that affect this decision, and which is the preferred method of replacing the second pilot by choosing between an array of alternative options proposed by the industry.

Based on the qualitative findings …

S7e9: What New Frontiers Await For Maine’S Space Economy?, Ron Lisnet, Ali Abedi, Joseph Patton

The Maine Question

University of Maine research and education have ascended beyond Earth’s atmosphere since the 1990s. For example, UMaine scientists have tested the latest hypervelocity decelerators for NASA space travel and created a wireless leak detection system for the International Space Station. Through its latest inventions and studies, and scholarship and fellowship programs, UMaine plays a critical role in advancing the state’s space economy and training future leaders in the aerospace industry. But the university is far from reaching its final frontier.

In recent years, UMaine researchers have been developing the state’s first small research satellite with the University of Southern Maine …

Aviation Supply And Demand In The São Paulo And Rio De Janeiro Systems Evolution: An Exploratory Study, Leila Halawi, Bruno De Paula Balan, Renan Cipriano Da Cunha, Maria Claudia Ferreira Da Cunha

Publications

Aim/purpose – Multiple factors affect a passenger’s origin and destination airport choice. This study explores some of the leading indicators associated with performance in cities with more than one airport. Two important Multi-Airport Systems (MAS) in Brazil were the object of this study: São Paulo (Congonhas and Guarulhos) and Rio de Janeiro (Santos Dumont and Galeão), the most significant demand-generating centers in the country and the most critical distribution centers of flights from South America.

Design/methodology/approach – Using public databases presenting the evolution of supply and demand from 2013 to 2018, the evolution of flights, and the sales by airlines …

The Maritime Transportation Sector: Addressing Key Challenges Towards Sustainable Development, Rayan Dui

Center for Business Research and Development

The present business landscape expects sustainability from the most diverse organizations. However, sustainability issues in maritime transportation have taken a lower priority among its stakeholders. The different maritime stakeholders have started to become aware of their sustainability responsibility as interest in sustainable shipping has grown among retailers and their shipping vessels, leading to cost-efficiency in their operations and compliance with regulations and conventions set forth by the IMO (Lister, 2015). It must be noted that the maritime transportation sector is central to the worldwide economy as it is responsible for transporting products of all kinds and accounts for approximately ninety …

Comprehensive Report On Extraterrestrial Resource Extraction, Robinson Raphael

Student Works

The prospect of asteroid mining provides a plethora of riches that include metals and water. As the number of discovered asteroids continues to grow, opportunities arise to commercialize these resources within Near-Earth Asteroids (NEAs). With urgent applications on Earth and in space, NEAs allow for a surge in sales. Planning forward, Astroider Aerospace Systems follows a mission split into four phases. Phase 1 develops a series of spacecraft using existing technologies, titled as Near-Earth Asteroid Miners and Near-Earth Asteroid Surveyors. Phase 2 first launches the surveyors to candidate NEAs, prospecting them for ores. To identify potential celestial bodies for this …

Shifting Satellite Control Paradigms: Operational Cybersecurity In The Age Of Megaconstellations, Carl A. Poole [*], Robert A. Bettinger, Mark Reith

Faculty Publications

The introduction of automated satellite control systems into a space-mission environment historically dominated by human-in-the-loop operations will require a more focused understanding of cybersecurity measures to ensure space system safety and security. On the ground-segment side of satellite control, the debut of privately owned communication antennas for rent and a move to cloud-based operations or mission centers will bring new requirements for cyber protection for both Department of Defense and commercial satellite operations alike. It is no longer a matter of whether automation will be introduced to satellite operations, but how quickly satellite operators can adapt to the onset of …

The Sustainability Of Integrated Cruise Ship Sanitation And Wastewater Management Systems: A Contribution To Circular Economy Strategies In The Baltic Region, Jenette Tifuh Mujingni

World Maritime University Ph.D. Dissertations

The implementation of sustainable sanitation and wastewater management strategies has been recognized as one of the most important strategies for mitigating wastewater-sourced nutrient environmental pollution, and a central contributor to the United Nations Sustainable Development Goals (UNSDGs). This study suggests that, by closing the nutrient loop through the implementation of Circular Economy principles in the management of cruise ship sanitary wastewater and enhancing the resource efficiency of the IGFS, the cruise industry could support the agricultural sector through the supply of more sustainable organic nutrients for farming with the overall goal of rendering both activities “green”, and mitigating the effect …

Economic Growth, Energy Consumption, And Carbon Dioxide Emissions In The E7 Countries: A Bootstrap Ardl Bound Test, Teng Tong, Jaime Ortiz, Chuanhua Xu, Fangjhy Li

International Business and Entrepreneurship Faculty Publications and Presentations

Background

International awareness of the impact of global warming and climate change is increasing. Developing countries face the task of achieving sustainable economic growth while also improving the efficiency of their energy consumption. The E7 countries (Brazil, India, Indonesia, Mexico, People’s Republic of China, Russia, and Turkey) are all highly concerned with the promotion of carbon-emission-reduction strategies.

Methods

This research uses a bootstrap autoregressive distributed lag (ARDL) bound test with structural breaks to examine the cointegration and causality relations between economic growth, energy consumption, and carbon dioxide (CO2) emissions in the E7 countries.

Results

There is no cointegration between economic …

Philippine Air Transportation: Impact And Challenges, Krista Danielle Yu, Paulynne Castillo, Cesar C. Rufino, Maria Zunally Rapada, Tereso S. Tullao Jr.

Angelo King Institute for Economic and Business Studies (AKI)

With the Philippines’ archipelagic geography, air transport is the most efficient way to connect its islands and boost economic activities. Using the latest Philippine input-output tables (National Statistical Coordination Board, 2006; Philippine Statistics Authority, 2014, 2017), the air transport sector proves to be the leading driver of economic activities. Ranking first relative to all other sectors in the economy, in terms of backward linkages, indicates its general dependence on the rest of the economy for inputs to the services that it provides.