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We present results from axisymmetric, time-dependent hydrodynamical (HD) and magnetohydrodynamical (MHD) simulations of a gaseous envelope collapsing onto a black hole (BH). We consider gas with so small angular momentum that after an…

Astrophysics · Physics 2009-11-10 Daniel Proga

Space weather observations and modeling at Mars have begun but they must be significantly increased to support the future of Human Exploration on the Red Planet. A comprehensive space weather understanding of a planet without a global…

Space Physics · Physics 2022-12-06 James L. Green , Chuanfei Dong , Michael Hesse , C. Alex Young , Vladimir Airapetian

Challenging space mission scenarios include those in low altitude orbits, where the atmosphere creates significant drag to the S/C and forces their orbit to an early decay. For drag compensation, propulsion systems are needed, requiring…

Timely transportation of organs, patients, and medical supplies is critical to modern healthcare, particularly in emergencies and transplant scenarios where even short delays can severely impact outcomes. Traditional ground-based vehicles…

Computation and Language · Computer Science 2026-02-04 Elaheh Sabziyan Varnousfaderani , Syed A. M. Shihab , Mohammad Taghizadeh

In this paper, we consider a prospective receiving hybrid beamforming structure consisting of several radio frequency (RF) chains and abundant antenna elements in multi-input multi-output (MIMO) systems. Due to conventional costly full…

Information Theory · Computer Science 2024-05-21 Li-Hsiang Shen , Yen-Chun Lo , Kai-Ten Feng , Sau-Hsuan Wu , Lie-Liang Yang

Operating satellites in Very Low Earth Orbit (VLEO) benefits the already expanding New Space industry in applications including Earth Observation and beyond. However, long-term operations at such low altitudes require propulsion systems to…

Multi-agent Pickup and Delivery (MAPD) is a challenging industrial problem where a team of robots is tasked with transporting a set of tasks, each from an initial location and each to a specified target location. Appearing in the context of…

Multiagent Systems · Computer Science 2021-10-29 Zhe Chen , Javier Alonso-Mora , Xiaoshan Bai , Daniel D. Harabor , Peter J. Stuckey

We construct a new type of transfer from the Earth to Mars, which ends in ballistic capture. This results in a substantial savings in capture $\Delta v$ from that of a classical Hohmann transfer under certain conditions. This is…

Earth and Planetary Astrophysics · Physics 2015-06-23 Francesco Topputo , Edward Belbruno

In the distant future, humans will surely fly to Mars. Even today, probes and vehicles are carrying out measurements on the surface of Mars. However, most landings on Mars cannot be carried out with parachutes alone. Instead, landing…

Physics Education · Physics 2019-12-12 Markus Nielbock

Mobile edge caching/computing has been emerging as a promising paradigm to provide new services (e.g., ultra-high rate, ultra-reliable, and/or low-latency communications) in future wireless networks. In this paper, we introduce a novel…

Networking and Internet Architecture · Computer Science 2019-06-10 Yuris Mulya Saputra , Dinh Thai Hoang , Diep N. Nguyen , Eryk Dutkiewicz

Data assimilation is an increasingly popular technique in Mars atmospheric science, but its effect on the mean states of the underlying atmosphere models has not been thoroughly examined. The robustness of results to the choice of model and…

Earth and Planetary Astrophysics · Physics 2022-03-02 Todd A. Mooring , Gabrielle E. Davis , Steven J. Greybush

We propose a novel Energy-Predictive Drone Service (EPDS) framework for efficient package delivery within a skyway network. The EPDS framework incorporates a formal modeling of an EPDS and an adaptive bidirectional Long Short-Term Memory…

Robotics · Computer Science 2025-08-05 Guanting Ren , Babar Shahzaad , Balsam Alkouz , Abdallah Lakhdari , Athman Bouguettaya

This paper presents the design of Variable-Pitch-Propeller mechanism and its application on a quadcopter called Heliquad to demonstrate its unique capabilities. The input-output relationship is estimated for a generic mechanism. Various…

Systems and Control · Electrical Eng. & Systems 2024-04-09 Eeshan Kulkarni , Suresh Sundaram

Interest in the exploration of, and the establishment of a human settlement, on Mars is rapidly growing. To achieve this, rapid transit will be required to bring crucial cargo. Current missions to Mars take 150 days, which would be too long…

Space Physics · Physics 2023-01-09 Madhukarthik Mohanalingam , Christopher Carr

Rapid aerial grasping through robots can lead to many applications that utilize fast and dynamic picking and placing of objects. Rigid grippers traditionally used in aerial manipulators require high precision and specific object geometries…

Latent heat thermal energy storage (LHTES) has been recommended as an effective technology to the thermal management system of space exploration for its excellent ability of storing thermal energy. However, it is well known that the low…

Fluid Dynamics · Physics 2021-04-30 Kun He , Ben Ma , Lei Wang

In order for off-Earth top surface structures built from regolith to protect astronauts from radiation, they need to be several meters thick. Technical University Delft (TUD) proposes to excavate into the ground to create subsurface…

Instrumentation and Methods for Astrophysics · Physics 2021-05-07 Henriette Bier , Edwin Vermeer , Arwin Hidding , Krishna Jani

In this paper, we present a drone-based delivery system that assumes to deal with two different mixed-areas, i.e., rural and urban. In these mixed-areas, called EM-grids, the distances are measured with two different metrics, and the…

Data Structures and Algorithms · Computer Science 2023-02-28 Francesco Betti Sorbelli , Federico Corò , Sajal K. Das , Cristina M. Pinotti , Anil Shende

Recent trends in robotic services propose offloading robot functionalities to the Edge to meet the strict latency requirements of networked robotics. However, the Edge is typically an expensive resource and sometimes the Cloud is also an…

Robotics · Computer Science 2023-02-15 Khasa Gillani , Jorge Martín Pérez , Milan Groshev , Antonio de la Oliva , Robert Gazda

Today\'s world of space\'s primary concern is the uncontrolled growth of space debris and its probability of collision with spacecraft, particularly in the low earth orbit (LEO) regions. This paper is aimed to design an optimized…

Robotics · Computer Science 2022-08-10 Roshan Sah , Raunak Srivastava , Kaushik Das