27 research outputs found
Design and analysis of memristor-based reliable crossbar architectures
The conventional transistor-based computing landscape is already undergoing dramatic
changes. While transistor-based devices’ scaling is approaching its physical limits in
nanometer technologies, memristive technologies hold the potential to scale to much
smaller geometries.
Memristive devices are used majorly in memory design but they also have unignorable
applications in logic design, neuromorphic computing, sensors among many others. The
most critical research and development problems that must be resolved before memristive
architectures become mainstream are related to their reliability. One of such reliability
issue is the sneak-paths current which limits the maximum crossbar array size. This thesis
presents various designs of the memristor based crossbar architecture and corresponding
experimental analysis towards addressing its reliability issues.
Novel contribution of this thesis starts with the formulation of robust analytic models
for read and write schemes used in memristive crossbar arrays. These novel models are
less restrictive and are suitable for accurate mathematical analysis of any mn crossbar
array and the evaluation of their performance during these critical operations. In order
to minimise the sneak-paths problem, we propose techniques and conditions for reliable
read operations using simultaneous access of multiple bits in the crossbar array. Two
new write techniques are also presented, one to minimise failure during single cell write
and the other designed for multiple cells write operation. Experimental results prove that
the single write technique minimises write voltage drop degradation compared to existing
techniques. Test results from the multiple cells write technique show it consumes less
power than other techniques depending on the chosen configuration.
Lastly, a novel Verilog-A memristor model for simulation and analysis of memristor’s
application in gas sensing is presented. This proposed model captures the gas sensing
properties of titanium-dioxide using gas concentration to control the overall memristance
of the device. This model is used to design and simulate a first-of-its-kind sneak-paths
free memristor-based gas detection arrays. Experimental results from a 88 memristor
sensor array show that there is a ten fold improvement in the accuracy of the sensor’s
response when compared with a single memristor sensor
LASER Tech Briefs, September 1993
This edition of LASER Tech briefs contains a feature on photonics. The other topics include: Electronic Components and Circuits. Electronic Systems, Physical Sciences, Materials, Computer Programs, Mechanics, Machinery, Fabrication Technology, Mathematics and Information Sciences, Life Sciences and books and reports
NASA SBIR abstracts of 1992, phase 1 projects
The objectives of 346 projects placed under contract by the Small Business Innovation Research (SBIR) program of the National Aeronautics and Space Administration (NASA) are described. These projects were selected competitively from among proposals submitted to NASA in response to the 1992 SBIR Program Solicitation. The basic document consists of edited, non-proprietary abstracts of the winning proposals submitted by small businesses. The abstracts are presented under the 15 technical topics within which Phase 1 proposals were solicited. Each project was assigned a sequential identifying number from 001 to 346, in order of its appearance in the body of the report. Appendixes to provide additional information about the SBIR program and permit cross-reference of the 1992 Phase 1 projects by company name, location by state, principal investigator, NASA Field Center responsible for management of each project, and NASA contract number are included
Abstracts on Radio Direction Finding (1899 - 1995)
The files on this record represent the various databases that originally composed the CD-ROM issue of "Abstracts on Radio Direction Finding" database, which is now part of the Dudley Knox Library's Abstracts and Selected Full Text Documents on Radio Direction Finding (1899 - 1995) Collection. (See Calhoun record https://calhoun.nps.edu/handle/10945/57364 for further information on this collection and the bibliography).
Due to issues of technological obsolescence preventing current and future audiences from accessing the bibliography, DKL exported and converted into the three files on this record the various databases contained in the CD-ROM.
The contents of these files are:
1) RDFA_CompleteBibliography_xls.zip [RDFA_CompleteBibliography.xls: Metadata for the complete bibliography, in Excel 97-2003 Workbook format; RDFA_Glossary.xls: Glossary of terms, in Excel 97-2003 Workbookformat; RDFA_Biographies.xls: Biographies of leading figures, in Excel 97-2003 Workbook format];
2) RDFA_CompleteBibliography_csv.zip [RDFA_CompleteBibliography.TXT: Metadata for the complete bibliography, in CSV format; RDFA_Glossary.TXT: Glossary of terms, in CSV format; RDFA_Biographies.TXT: Biographies of leading figures, in CSV format];
3) RDFA_CompleteBibliography.pdf: A human readable display of the bibliographic data, as a means of double-checking any possible deviations due to conversion
Topical Workshop on Electronics for Particle Physics
The purpose of the workshop was to present results and original concepts for electronics research and development relevant to particle physics experiments as well as accelerator and beam instrumentation at future facilities; to review the status of electronics for the LHC experiments; to identify and encourage common efforts for the development of electronics; and to promote information exchange and collaboration in the relevant engineering and physics communities
NASA Tech Briefs, Summer 1983
Topics include: NASA TU Services: Technology Utilization services that can assist you in learning about and applying NASA technology. New Product Ideas: A summary of selected innovations of value to manufacturers for the development of new products; Electronic Components and Circuits; Electronic Systems; Physical Sciences; Materials; Life Sciences; Mechanics; Machinery; Fabrication Technology; Mathematics and information Sciences
NASA patent abstracts bibliography: A continuing bibliography. Section 2: Indexes (supplement 23)
Entries for 4000 patent and patent applications citations for the period May 1969 through June 1983 are listed. Subject, invention, source, number, and accession number indexes are included
NASA patent abstracts bibliography: A continuing bibliography. Section 2: Indexes (supplement 45)
A subject index is provided for over 5600 patents and patent applications for the period May 1969 through June 1994. Additional indexes list personal authors, corporate authors, contract numbers, NASA case numbers, U.S. patent class numbers, U.S. patent numbers, and NASA accession numbers
Understanding Quantum Technologies 2022
Understanding Quantum Technologies 2022 is a creative-commons ebook that
provides a unique 360 degrees overview of quantum technologies from science and
technology to geopolitical and societal issues. It covers quantum physics
history, quantum physics 101, gate-based quantum computing, quantum computing
engineering (including quantum error corrections and quantum computing
energetics), quantum computing hardware (all qubit types, including quantum
annealing and quantum simulation paradigms, history, science, research,
implementation and vendors), quantum enabling technologies (cryogenics, control
electronics, photonics, components fabs, raw materials), quantum computing
algorithms, software development tools and use cases, unconventional computing
(potential alternatives to quantum and classical computing), quantum
telecommunications and cryptography, quantum sensing, quantum technologies
around the world, quantum technologies societal impact and even quantum fake
sciences. The main audience are computer science engineers, developers and IT
specialists as well as quantum scientists and students who want to acquire a
global view of how quantum technologies work, and particularly quantum
computing. This version is an extensive update to the 2021 edition published in
October 2021.Comment: 1132 pages, 920 figures, Letter forma
NASA patent abstracts bibliography: A continuing bibliography. Section 2: Indexes (supplement 46)
A subject index is provided for over 5600 patents and patent applications for the period May 1969 through December 1994. Additional indexes list personal authors, corporate authors, contract numbers, NASA case numbers, U.S. patent class numbers, U.S. patent numbers, and NASA accession numbers