3,702 research outputs found
Intelligent Devices - Sensors and Actuators - A KSC Perspective
The primary objective of this workshop is to identify areas of advancement in sensor measurements and technologies that will help to define standard practices and procedures that will better enable the infusion into flight programs of sensors with improved capabilities but limited or no flight heritage. These standards would be crucial to demonstrating a methodology for validating current models while also creating the possibility of being able to have sufficient data to either update these models (e. g., spatial or temporal resolution, etc.) or develop new models based on the ability to simulate the new measured physical parameters. The workshop is also intended to narrow the gap between sensor measurements (and techniques), data processing techniques and the ability to make use of that data by gathering together experts in the field for a short workshop. This collaboration will unite NASA and other government agencies with contractor capabilities industry-wide to prevent duplication, spawn synergistic growth in sensor technology, help analysts make good engineering decisions and help focus new sensor maturation efforts to better meet future flight program customers' needs. This is the first such workshop designed to specifically address establishing a standardized protocol/methodology for demonstrating the technology readiness of non-flight heritage sensor systems. While other similar workshops are held covering many areas of interest to the sensor development community, no other meeting is specific enough to address this vital but often overlooked topic. By encouraging cross-fertilization of ideas from instrument experts from many different backgrounds, it is hoped that this workshop will initiate innovative new ideas and concepts in sensor development, calibration and validation. It is anticipated this workshop will repeat periodically as needed
Semiclassical approach to fidelity amplitude
The fidelity amplitude is a quantity of paramount importance in echo type
experiments. We use semiclassical theory to study the average fidelity
amplitude for quantum chaotic systems under external perturbation. We explain
analytically two extreme cases: the random dynamics limit --attained
approximately by strongly chaotic systems-- and the random perturbation limit,
which shows a Lyapunov decay. Numerical simulations help us bridge the gap
between both extreme cases.Comment: 10 pages, 9 figures. Version closest to published versio
Overview of the Smart Network Element Architecture and Recent Innovations
In industrial environments, system operators rely on the availability and accuracy of sensors to monitor processes and detect failures of components and/or processes. The sensors must be networked in such a way that their data is reported to a central human interface, where operators are tasked with making real-time decisions based on the state of the sensors and the components that are being monitored. Incorporating health management functions at this central location aids the operator by automating the decision-making process to suggest, and sometimes perform, the action required by current operating conditions. Integrated Systems Health Management (ISHM) aims to incorporate data from many sources, including real-time and historical data and user input, and extract information and knowledge from that data to diagnose failures and predict future failures of the system. By distributing health management processing to lower levels of the architecture, there is less bandwidth required for ISHM, enhanced data fusion, make systems and processes more robust, and improved resolution for the detection and isolation of failures in a system, subsystem, component, or process. The Smart Network Element (SNE) has been developed at NASA Kennedy Space Center to perform intelligent functions at sensors and actuators' level in support of ISHM
Using Microalgae for Converting Solar Energy into Biofuels and other Bio-products
It is consensual that current patterns of energy consumption and usage are unsustainable
in the medium to long term, as mankind still has an overwhelming dependence on fossil
fuels. Various renewable energy systems are being studied, developed and
implemented, with the main goals of reducing the dependence on fossil fuels,
decreasing the environmental impacts, increasing energy supply and security, among
other purposes.N/
Effects of imperfections for Shor's factorization algorithm
We study effects of imperfections induced by residual couplings between
qubits on the accuracy of Shor's algorithm using numerical simulations of
realistic quantum computations with up to 30 qubits. The factoring of numbers
up to N=943 show that the width of peaks, which frequencies allow to determine
the factors, grow exponentially with the number of qubits. However, the
algorithm remains operational up to a critical coupling strength
which drops only polynomially with . The numerical dependence of
on is explained by analytical estimates that allows to
obtain the scaling for functionality of Shor's algorithm on realistic quantum
computers with a large number of qubits.Comment: 10 pages, 10 figures, 1 table. Added references and new data. Erratum
added as appendix. 1 Figure and 1 Table added. Research is available at
http://www.quantware.ups-tlse.fr
Coronavirus Vaccines (COVID-19; SARS-COV-2): preliminary review of articles, patents, clinical trials and market
O recente surto de CoronavĂrus gerou uma pandemia mundial. Este artigo consiste em um estudo exploratĂłrio para avaliar parcialmente o volume existente de material e o potencial de aprofundar futuras prospecçÔes tecnolĂłgicas. O propĂłsito deste estudo Ă© o de prĂ©-avaliar o conhecimento que existe em ciĂȘncia (por meio de artigos), em tecnologia (por meio de patentes) e em testes clĂnicos e prontos para uso (por meio de vacinas disponĂveis no mercado). Os artigos foram mapeados na Web of Knowledge, o mapeamento patentĂĄrio usou a base Worldwide europeia, usando o software OrbitÂź. Os estudos clĂnicos utilizaram a base de dados dos Estados Unidos da AmĂ©rica (EUA). Foram encontradas 991 patentes, 125 artigos e 115 estudos clĂnicos sendo apenas dois que se referem explicitamente a vacinas. A evolução anual mostra um crescimento exponencial a partir de 2002-2004 para artigos e para patentes. A grande maioria dos estudos clĂnicos nem foi ainda iniciada (apenas 15% foram completados), evidenciando que hĂĄ necessidade urgente de estimular sua maturação. NĂŁo existe, no momento, no mercado, uma vacina que seja considerada efetiva mundialmente.The recent Coronavirus outbreak has sparked a worldwide pandemic. This article consists of an exploratory study to assess the existing volume of material and the potential for further technological assessment and forecast. It is used to assess the knowledge that exists in science (through articles), in technology (through patents), in clinical tests and ready for use (through vaccines available on the market). The articles were mapped on the Web of Knowledge, the patent assessment used the European Worldwide database, using the OrbitÂź software. 991 patents, 125 articles and 115 clinical studies were found, with only 2 explicitly referring to vaccines. The annual evolution shows an exponential growth from 2002-2004 for articles and for patents. The vast majority of clinical studies have not yet started (only 15% have been completed), showing that there is an urgent need to stimulate their maturation. There is still no vaccine on the market that is considered worldwide effective.info:eu-repo/semantics/publishedVersio
Spectroscopic classification of X-ray sources in the Galactic Bulge Survey
We present the classification of 26 optical counterparts to X-ray sources
discovered in the Galactic Bulge Survey. We use (time-resolved) photometric and
spectroscopic observations to classify the X-ray sources based on their
multi-wavelength properties. We find a variety of source classes, spanning
different phases of stellar/binary evolution. We classify CX21 as a quiescent
cataclysmic variable (CV) below the period gap, and CX118 as a high accretion
rate (nova-like) CV. CXB12 displays excess UV emission, and could contain a
compact object with a giant star companion, making it a candidate symbiotic
binary or quiescent low mass X-ray binary (although other scenarios cannot be
ruled out). CXB34 is a magnetic CV (polar) that shows photometric evidence for
a change in accretion state. The magnetic classification is based on the
detection of X-ray pulsations with a period of 81 2 min. CXB42 is
identified as a young stellar object, namely a weak-lined T Tauri star
exhibiting (to date unexplained) UX Ori-like photometric variability. The
optical spectrum of CXB43 contains two (resolved) unidentified double-peaked
emission lines. No known scenario, such as an AGN or symbiotic binary, can
easily explain its characteristics. We additionally classify 20 objects as
likely active stars based on optical spectroscopy, their X-ray to optical flux
ratios and photometric variability. In 4 cases we identify the sources as
binary stars.Comment: Accepted for publication in MNRA
Self-Validating Thermocouple
Self-Validating Thermocouple (SVT) Systems capable of detecting sensor probe open circuits, short circuits, and unnoticeable faults such as a probe debonding and probe degradation are useful in the measurement of temperatures. SVT Systems provide such capabilities by incorporating a heating or excitation element into the measuring junction of the thermocouple. By heating the measuring junction and observing the decay time for the detected DC voltage signal, it is possible to indicate whether the thermocouple is bonded or debonded. A change in the thermal transfer function of the thermocouple system causes a change in the rise and decay times of the thermocouple output. Incorporation of the excitation element does not interfere with normal thermocouple operation, thus further allowing traditional validation procedures as well
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