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168 results on '"Vladimirova, Tanya"'

4. Wireless Fault-Tolerant Distributed Architecture for Satellite Platform Computing

Author

Vladimirova, Tanya, Fayyaz, Muhammad, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Lee, Geuk, editor, Howard, Daniel, editor, Kang, Jeong Jin, editor, and Ślęzak, Dominik, editor

Published
2012
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5. Integer KLT Design Space Exploration for Hyperspectral Satellite Image Compression

Author

Noor, Nor Rizuan Mat, Vladimirova, Tanya, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Lee, Geuk, editor, Howard, Daniel, editor, and Ślęzak, Dominik, editor

Published
2011
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7. A Self-reconfigurable System-on-Chip Architecture for Satellite On-Board Computer Maintenance

Author

Wu, Xiaofeng, Vladimirova, Tanya, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Jesshope, Chris, editor, and Egan, Colin, editor

Published
2006
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8. A Novel Processor Architecture for Real-Time Control

Author

Wu, Xiaofeng, Chouliaras, Vassilios, Nunez-Yanez, Jose, Goodall, Roger, Vladimirova, Tanya, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Jesshope, Chris, editor, and Egan, Colin, editor

Published
2006
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9. Embedded Intelligent Imaging On-Board Small Satellites

Author

Yuhaniz, Siti, Vladimirova, Tanya, Sweeting, Martin, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Srikanthan, Thambipillai, editor, Xue, Jingling, editor, and Chang, Chip-Hong, editor

Published
2005
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17. Fault-tolerant encryption for space applications

Author

Banu, Roohi and Vladimirova, Tanya

Subjects
Fault tolerance (Computers) -- Usage, Fault tolerance (Computers) -- Analysis, Satellite communications services industry -- Technology application, Satellite communications services industry -- Safety and security measures, Satellite imaging -- Technology application, Satellite imaging -- Safety and security measures, Fault tolerance, Technology application, Aerospace and defense industries, Business, Computers, Electronics, Electronics and electrical industries
Abstract

This paper is concerned with the use of commercial security algorithms like the Advanced Encryption Standard (AES) in Earth observation small satellites. The demand to protect the sensitive and valuable data transmitted from satellites to ground has increased and hence the need to use encryption on board. AES, which is a very popular choice in terrestrial communications, is slowly emerging as the preferred option in the aerospace industry including satellites. This paper first addresses the encryption of satellite imaging data using five AES modes--ECB, CBC, CFB, OFB and CTR. A detailed analysis of the effect of single even upsets (SEUs) on imaging data during on-board encryption using different modes of AES is carried out. The impact of faults in the data occurring during transmission to ground due to noisy channels is also discussed and compared for all the five modes of AES. In order to avoid data corruption due to SEUs, a novel fault-tolerant model of AES is presented, which is based on the Hamming error correction code. A field programmable gate array (FPGA) implementation of the proposed model is carried out and measurements of the power and throughput overhead are presented.

Published
2009

37. Enabling Space Sensor Networks with PCBSat

Author

Barnhart, David, Vladimirova, Tanya, Sweeting, Martin, Balthazor, Richard, Enloe, Lon, Krause, Habash, Lawrence, Timothy, Mcharg, Matthew, Lyke, Jim, White, Jim, and Baker, Adam

Abstract

Distributed space mission concepts are emerging for scientific applications requiring constellations of hundreds to thousands of satellites. Analogous to proliferating terrestrial wireless sensor networks, massively distributed space sensor networks will enable the observation of real-time multi-point phenomenology. For example, an ionospheric plasma depletion sensor network would shed light on “plasma bubbles” accepted as the cause of satellite navigation and communication signal scintillation at low latitudes in the post-dusk sector. Economics dictate a low-cost, massproducible sensor node for this prospective class of space mission. One promising concept is a satellite-on-a-printed circuit board (PCBSat), which leverages the multi-billion dollar infrastructure of the commercial PCB industry. The system configuration goals are: 10x10x2 cm and approximately 200 g mass, while supporting a small sensor, such as the Miniature Electrostatic Analyzer (MESA). Three interim stage prototype design cycles and partial environmental testing have been completed successfully. This paper briefly surveys distributed space missions and presents a complete mission architecture for the ionospheric plasma depletion study. Sub-kilogram very small satellite technologies are then discussed, followed by comparative cost modeling for commercial mass-production. The detailed design and environmental testing results of PCBSat complete the paper, including launch opportunities.

Published
2007

40. Preface

Author

Vladimirova, Tanya, primary, Katz, Richard, additional, Wansch, Rainer, additional, Zhao, Zhengxu, additional, Newell, Michael, additional, Merodio, David, additional, Emam, Omar, additional, Huebner, Michael, additional, Erdogan, Ahmet, additional, Fayyaz, Muhammad, additional, and Zhai, Xiaojun, additional

Published
2014
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45. A CCSDS Software System for a Single-Chip On-Board Computer of a Small Satellite

Author

Rutter, Isabel, Vladimirova, Tanya, and Tiggeler, Hans

Abstract

The work presented in this paper is part of a Surrey Space Centre research project that aims to reduce the size of an on-board computer to a single chip facilitating further miniaturisation of small satellites. The paper is concerned with a communication system, specifically designed to meet the needs of a single-chip onboard computer - a simplified yet reliable and automated standalone alternative software implementation of the Consultative Committee of Space Data Systems (CCSDS) protocol communicating with a standard universal asynchronous receiver-transmitter (UART) peripheral. Details of the design and implementation stages of a CCSDS package coded in the language C are given. A thin hardware layer is described which translates the asynchronous UART stream into a CCSDS compliant synchronous stream. Synthesis results targeted at Actel FPGAs are presented taking into account single event upset tolerant coding styles.

Published
2001

46. Heterogeneous System-on-a-Chip Design for Self-Powered Wireless Sensor Networks in Non-Benign Environments

Author

SURREY UNIV GUILDFORD (UNITED KINGDOM) SURREY SPACE CENTRE, Vladimirova, Tanya, Barnhart, David J., SURREY UNIV GUILDFORD (UNITED KINGDOM) SURREY SPACE CENTRE, Vladimirova, Tanya, and Barnhart, David J.

Abstract

A new dimension of system architecture design is emerging where hundreds to thousands of ultralight (<10g) sensor nodes will collectively perform a spectrum of wireless sensor network missions in a distributed fashion. To support this architecture, high volume production of sensor nodes at low cost is required. This proposed basic research project is aimed at the development of a technique to design and fabricate self-powered wireless sensor nodes monolithically as a system-on-a-chip (SoC) with a commercially available complementary metal-on-silicon (CMOS) very large scale integration (VLSI) process. Two essential technologies specifically targeted at non-benign environments have been investigated and reported on: integrated solar cells in CMOS and radiation hardening by design of asynchronous logic. A first-ever design for integrated solar cells in commercial CMOS is presented. Two prototype designs have been designed, fabricated, and tested. The average efficiency of the first prototype is 2.4%, compared to an estimated, but unverified 1% from previous work. The actual efficiency of the junction is 8.3%, without considering the metallization overhead. An improved design demonstrates 3.44% efficiency, a 40% improvement. The junction efficiency alone is 11.3%. However, power from these first two prototypes cannot be harnessed properly in the current implementation. A final design, overcoming this limitation, has been submitted for fabrication and will be reported in a later publication. This novel development has potential widespread application to a rapidly growing number of solar self-powered SoC designs of any type., The original document contains color images.

Published
2008

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