Regional air mobility refers to the transportation of passengers aboard small aircraft over short distances. These operations are challenging due low passenger volumes, competing modes, and high operating costs. Nevertheless, recent convergence new technologies for electric propulsion autonomy brings promise step-changes in both efficiency sustainability. The next challenge is define concepts t...

Reducing air pollution and greenhouse gas emissions has become one of the primary tasks for shipping industry over past few years. Among alternative marine fuels, liquefied natural (LNG) is regarded as most popular fuels because it cleanest fossil fuels. Therefore, a practical way to implement green deploy dual-fuel ships that can burn conventional fuel oil LNG on various ship routes. However, ...

The environment of those who live and work in warships is closely related to the way the ships are built and employed. In stating the requirements for the atmosphere between decks the emphasis has swung during the past 50 years from the need for controlling the chemical constituents to the control of the factors which comprise the thermal environment, and now, with the advent of the nuclear-pow...

This paper deals with the Electric Vehicle Scheduling and Optimal Charging Problem. More precisely, given a fleet of Electric Vehicles EVs and Combustion Engine Vehicles CVs, a set of tours to be processed by vehicles and a charging infrastructure, the problem aims to optimize the assignment of vehicles to tours and minimize the charging cost of EVs, while considering several operational constr...

The Center for the Management of Information (CMI) at The University of Arizona engaged in a joint research project with the U.S. Navy’s Commander Third Fleet (Third Fleet) and The MITRE Corporation (MITRE) to use and evaluate collaborative technology during Strong Angel, a humanitarian assistance/disaster relief (HA/DR) exercise. Strong Angel was a part of RIMPAC 2000, a five-week multinationa...

This study proposes six novel techniques on the customer’s priority while addressing conventional hub location issue. Each strategy assigns a value to every customer based distance and demand parameters, in which customers are prioritized this value. Then, vehicle fleet is scheduled according priority. A new mixed-integer linear programming model presented applied for each location-scheduling p...

The fleet assignment problem (FAP) deals with assigning aircraft types, each having a different capacity, to the scheduled flights, based on equipment capabilities and availabilities, operational costs, and potential revenues. An airline s fleeting decision highly impacts its revenues, and thus, constitutes an essential component of its overall scheduling process. However, due to the large numb...

Abstract Effective utilization of service vessels in sea-based fish farming requires that the are suited to operating environments at farms. This paper presents a methodology for assessing vessel fleet performance when serving network farms with different metocean conditions. Fleet is defined as ability perform operations requested by farms, due time. An optimization simulation approach employe...

This paper reviews studies from the past 30 years that use operations research methods to tackle containership routing and scheduling problems at the strategic, tactical, and operational planning levels. These problems are first classified and summarized, with a focus on model formulations, assumptions, and algorithm design. The paper then gives an overview of studies on containership fleet siz...

Even in the era of automatization maritime safety constantly needs improvements. Regardless presence crew members on board, both manned and autonomous ships should follow clear guidelines (no matter as bridge procedures or algorithms). To date, many indicators, especially collision avoidance have been proposed. One such parameters commonly used day-to-day navigation but usually omitted by resea...