|
|
|
|
|
Muhammad Bin Saif, Sara Migliorini and Fausto Spoto
Blockchain technology has been successfully applied in recent years to promote the immutability, traceability, and authenticity of previously collected and stored data. However, the amount of data stored in the blockchain is usually limited for economic ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Leonard Vance, Agustin Espinoza, Jorge Martinez Dominguez, Salil Rabade, Gavin Liu and Jekan Thangavelautham
Sustainable space exploration will require using off-world resources for propellant generation. Using off-world-generated propellants significantly increases future missions? range and payload capacity. Near Earth Objects (NEOs) contain a range of availa...
ver más
|
|
|
|
|
|
|
|
|
|
|
Janis Dalbins, Kristo Allaje, Hendrik Ehrpais, Iaroslav Iakubivskyi, Erik Ilbis, Pekka Janhunen, Joosep Kivastik, Maido Merisalu, Mart Noorma, Mihkel Pajusalu, Indrek Sünter, Antti Tamm, Hans Teras, Petri Toivanen, Boris Segret and Andris Slavinskis
Nanosatellites have established their importance in low-Earth orbit (LEO), and it is common for student teams to build them for educational and technology demonstration purposes. The next challenge is the technology maturity for deep-space missions. The ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Andris Slavinskis, Mario F. Palos, Janis Dalbins, Pekka Janhunen, Martin Tajmar, Nickolay Ivchenko, Agnes Rohtsalu, Aldo Micciani, Nicola Orsini, Karl Mattias Moor, Sergei Kuzmin, Marcis Bleiders, Marcis Donerblics, Ikechukwu Ofodile, Johan Kütt, Tõnis Eenmäe, Viljo Allik, Jaan Viru, Pätris Halapuu, Katriin Kristmann, Janis Sate, Endija Briede, Marius Anger, Katarina Aas, Gustavs Plonis, Hans Teras, Kristo Allaje, Andris Vaivads, Lorenzo Niccolai, Marco Bassetto, Giovanni Mengali, Petri Toivanen, Iaroslav Iakubivskyi, Mihkel Pajusalu and Antti TammaddShow full author listremoveHide full author list
The electric solar wind sail, or E-sail, is a propellantless interplanetary propulsion system concept. By deflecting solar wind particles off their original course, it can generate a propulsive effect with nothing more than an electric charge. The high-v...
ver más
|
|
|
|
|
|
|
|
|
|
|
Giacomo Lari, Marco Zannoni, Daniele Durante, Ryan S. Park and Giacomo Tommei
The extreme accuracy of Juno radio science data allows us to perform very precise orbit determination experiments. While previous works focused on the estimation of the gravitational field of Jupiter, in this article, we aim to accurately determine the p...
ver más
|
|
|
|
|
|
|
|
|
|
|
Leina Abdelgalil and Mohamed Mejri
Electronic health records (EHRs) play an important role in our life. However, most of the
time, they are scattered and saved on different databases belonging to distinct institutions (hospitals,
laboratories, clinics, etc.) geographically distributed acr...
ver más
|
|
|
|
|
|
|
|
|
|
|
Fu-Yuen Hsiao
This study investigated the variation of the osculating orbit elements of a spacecraft propelled by photonic laser propulsion (PLP) under the two-body problem assumption. The PLP thrusting system can produce continuous and constant thrust. This paper fir...
ver más
|
|
|
|
|
|
|
|
|
|
|
Sergey Agayan, Shamil Bogoutdinov, Roman Krasnoperov and Roman Sidorov
The article is focused on the approach based on the discrete mathematical analysis conception and continues a series of studies related to the application of the previously developed methodology to geophysical data analysis. The main idea of the study is...
ver más
|
|
|
|
|
|
|
|
|
|
|
Stefano Casini, Iosto Fodde, Bert Monna, Angelo Cervone and Eberhard Gill
The purpose of this work is to present a novel CubeSat architecture, aimed to explore Near Earth Asteroids. The fast growth in small satellite commercial-off-the-shelf technologies, which characterized the last decade of space industry, is exploited to d...
ver más
|
|
|
|
|
|
|
|
|
|
|
Dillon O?Reilly, Georg Herdrich and Darren F. Kavanagh
Over 2500 active satellites are in orbit as of October 2020, with an increase of ~1000 smallsats in the past two years. Since 2012, over 1700 smallsats have been launched into orbit. It is projected that by 2025, there will be 1000 smallsats launched per...
ver más
|
|
|
|
|
|
|
|
|
|
|
Toshiki Tanaka, Takuji Ebinuma, Shinichi Nakasuka and Heidar Malki
In this study, dual-satellite lunar global navigation systems that consist of a constellation of two navigation satellites providing geo-spatial positioning on the lunar surface were compared. In our previous work, we proposed a new dual-satellite relati...
ver más
|
|
|
|
|
|
|
|
|
|
|
Ravi teja Nallapu, Graham Dektor, Nalik Kenia, James Uglietta, Shota Ichikawa, Mercedes Herreras-Martinez, Akshay Choudhari, Aman Chandra, Stephen Schwartz, Erik Asphaug and Jekanthan Thangavelautham
The Martian satellites Phobos and Deimos hold many unanswered questions that may provide clues to the origin of Mars. These moons are low Δv" role="presentation">????v
?
v
stopover sites to Mars. Some human missions to Mars typically identify ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Toshiki Tanaka, Takuji Ebinuma and Shinichi Nakasuka
In view of the upcoming missions to obtain resources from the lunar surface, it is essential to have highly-accurate navigation systems to locate surface vehicles in shadowed regions. In response, we propose a dual-satellite lunar navigation system that ...
ver más
|
|
|
|
|
|
|
|
|
|
|
VIRGINIA M. SILBERGLEIT
Auroral observations of equatorward extent of the rayed auroral displays are researched. Ground-based observations at Belgrano Station (78.0º S; 38.8º W) during the southern winter months of 1981 are considered. Four hourly sequences of geomagnetic in...
ver más
|
|
|
|
|
|
|
|
|
|
|
Lorenzo Niccolai, Marco Bassetto, Alessandro A. Quarta and Giovanni Mengali
Propellantless propulsive systems such as Electric Solar Wind Sails are capable of accelerating a deep-space probe, only requiring a small amount of propellant for attitude and spin-rate control. However, the generated thrust magnitude is usually small w...
ver más
|
|
|
|
|
|
|
|
|
|
|
Marco Bertolazzi and Carlo Caini
This paper aims to present a possible alternative to direct file transfer in ?challenged networks?, by using DTNbox, a recent application for peer-to-peer directory synchronization between DTN nodes. This application uses the Bundle Protocol (BP) to tack...
ver más
|
|
|
|
|
|
|
|
|
|
|
Ricardo Martins Gonçalves, Miguel Mira da Silva and Paulo Rupino da Cunha
The immutability of data stored in a blockchain is a crucial pillar of trust in this technology, which has led to its increasing adoption in various use cases. However, there are situations where the inability to change or delete data may be illegal. Eur...
ver más
|
|
|
|
|
|
|
|
|
|
|
Yongbo Jiang, Gongxue Sun and Tao Feng
With the increasing value of various kinds of data in the era of big data, the demand of different subjects for data transactions has become more and more urgent. In this paper, a blockchain-based data transaction protection scheme is proposed to realize...
ver más
|
|
|
|
|
|
|
|
|
|
|
Ruibin Zeng, Jiali You, Yang Li and Rui Han
The Interplanetary File System (IPFS), a new type of P2P file system, enables people to obtain data from other peer nodes in a distributed system without the need to establish a connection with a distant server. However, IPFS suffers from low resolution ...
ver más
|
|
|
|
|
|
|
|
|
|
|
David Morante, Manuel Sanjurjo Rivo and Manuel Soler
In this paper, we provide a survey on available numerical approaches for solving low-thrust trajectory optimization problems. First, a general mathematical framework based on hybrid optimal control will be presented. This formulation and their elements, ...
ver más
|
|
|
|
|
|