Science.gov

Sample records for rave system requirements

  1. RAVE: Rapid Visualization Environment

    NASA Technical Reports Server (NTRS)

    Klumpar, D. M.; Anderson, Kevin; Simoudis, Avangelos

    1994-01-01

    Visualization is used in the process of analyzing large, multidimensional data sets. However, the selection and creation of visualizations that are appropriate for the characteristics of a particular data set and the satisfaction of the analyst's goals is difficult. The process consists of three tasks that are performed iteratively: generate, test, and refine. The performance of these tasks requires the utilization of several types of domain knowledge that data analysts do not often have. Existing visualization systems and frameworks do not adequately support the performance of these tasks. In this paper we present the RApid Visualization Environment (RAVE), a knowledge-based system that interfaces with commercial visualization frameworks and assists a data analyst in quickly and easily generating, testing, and refining visualizations. RAVE was used for the visualization of in situ measurement data captured by spacecraft.

  2. Ukidna: the RAVE machine

    NASA Astrophysics Data System (ADS)

    McGrath, Andrew J.; Saunders, Will; Watson, Fred; Miziarski, Stan

    2004-09-01

    The Anglo-Australian Observatory is currently designing a new fibre positioner for the UK Schmidt Telescope. The instrument will have 2250 fibres, positioned with sub-arcsecond accuracy across a six degree field of view, and will have a reconfiguration time of one minute. The instrument is to enable the RAVE survey of high precision abundances and velocities for up to 50 million stars. The design is largely adapted from the AAO's FMOS-Echidna fibre positioner for Subaru. New design challenges for Ukidna include the enormous number of fibres, the large focal surface, and the field curvature of the Schmidt telescope. These features are mostly shared with the expected needs of future prime-focus multi-fibre systems on 8-30m class telescopes. We present details and performance of the multi-actuator design.

  3. Galactic Archaeology Highlights from RAVE

    NASA Astrophysics Data System (ADS)

    Kordopatis, G.; RAVE Collaboration

    2016-10-01

    The RAdial Velocity Experiment (RAVE) collected from 2003 to 2013 spectra for half a million low-mass stars of our galaxy. The information collected by the project helped to better understand the observed properties of the Milky Way outside the immediate Solar neighborhood and to unravel parts of the history of the evolution of the Galaxy. In this paper we make an overview of the results of RAVE and present some perspectives about future synergies of this project with the Gaia mission.

  4. THE RAVE SURVEY: RICH IN VERY METAL-POOR STARS

    SciTech Connect

    Fulbright, Jon P.; Wyse, Rosemary F. G.; Ruchti, Gregory R.; Gilmore, G. F.; Grebel, Eva; Bienayme, O.; Siebert, A.; Binney, J.; Bland-Hawthorn, J.; Campbell, R.; Freeman, K. C.; Gibson, B. K.; Helmi, A.; Munari, U.; Navarro, J. F.; Siviero, A.; Parker, Q. A.; Reid, W.; Seabroke, G. M.; Steinmetz, M.

    2010-11-20

    Very metal-poor stars are of obvious importance for many problems in chemical evolution, star formation, and galaxy evolution. Finding complete samples of such stars which are also bright enough to allow high-precision individual analyses is of considerable interest. We demonstrate here that stars with iron abundances [Fe/H] <-2 dex, and down to below -4 dex, can be efficiently identified within the Radial Velocity Experiment (RAVE) survey of bright stars, without requiring additional confirmatory observations. We determine a calibration of the equivalent width of the calcium triplet lines measured from the RAVE spectra onto true [Fe/H], using high spectral resolution data for a subset of the stars. These RAVE iron abundances are accurate enough to obviate the need for confirmatory higher-resolution spectroscopy. Our initial study has identified 631 stars with [Fe/H] {<=}-2, from a RAVE database containing approximately 200,000 stars. This RAVE-based sample is complete for stars with [Fe/H] {approx_lt}-2.5, allowing statistical sample analysis. We identify three stars with [Fe/H] {approx_lt}-4. Of these, one was already known to be 'ultra metal-poor', one is a known carbon-enhanced metal-poor star, but we obtain [Fe/H] = -4.0, rather than the published [Fe/H] = -3.3, and derive [C/Fe] = +0.9, and [N/Fe] = +3.2, and the third is at the limit of our signal-to-noise ratio. RAVE observations are ongoing and should prove to be a rich source of bright, easily studied, very metal-poor stars.

  5. New distances to RAVE stars

    NASA Astrophysics Data System (ADS)

    Binney, J.; Burnett, B.; Kordopatis, G.; McMillan, P. J.; Sharma, S.; Zwitter, T.; Bienaymé, O.; Bland-Hawthorn, J.; Steinmetz, M.; Gilmore, G.; Williams, M. E. K.; Navarro, J.; Grebel, E. K.; Helmi, A.; Parker, Q.; Reid, W. A.; Seabroke, G.; Watson, F.; Wyse, R. F. G.

    2014-01-01

    Probability density functions (pdfs) are determined from new stellar parameters for the distance moduli of stars for which the RAdial Velocity Experiment (RAVE) has obtained spectra with S/N ≥ 10. Single-Gaussian fits to the pdf in distance modulus suffice for roughly half the stars, with most of the other half having satisfactory two-Gaussian representations. As expected, early-type stars rarely require more than one Gaussian. The expectation value of distance is larger than the distance implied by the expectation of distance modulus; the latter is itself larger than the distance implied by the expectation value of the parallax. Our parallaxes of Hipparcos stars agree well with the values measured by Hipparcos, so the expectation of parallax is the most reliable distance indicator. The latter are improved by taking extinction into account. The effective temperature-absolute magnitude diagram of our stars is significantly improved when these pdfs are used to make the diagram. We use the method of kinematic corrections devised by Schönrich, Binney and Asplund to check for systematic errors for general stars and confirm that the most reliable distance indicator is the expectation of parallax. For cool dwarfs and low-gravity giants, <ϖ> tends to be larger than the true distance by up to 30 per cent. The most satisfactory distances are for dwarfs hotter than 5500 K. We compare our distances to stars in 13 open clusters with cluster distances from the literature and find excellent agreement for the dwarfs and indications that we are overestimating distances to giants, especially in young clusters.

  6. Raves, psychosis, and spirit healing.

    PubMed

    Seeman, Mary V

    2010-07-01

    This paper reflects the intersection of three cultures: the rave (all night dance party and use of the drug, Ecstasy) culture; the ward culture of an inpatient psychiatric program for First Episode Psychosis; the spirit healing culture of the Philippines. All three intersected in Toronto, Canada in the mid 1990s, as illustrated by the clinical case of a 19-year-old university student who was hospitalized with symptoms of drug-induced psychosis. Her initial treatment was not successful and presented dilemmas for the treating staff. Transfer to a second psychiatric facility that permitted attendance at a traditional Filipino healing ceremony resulted in a cure, with no recurrence 10 years later. According to James Dow's 1986 formulation, the components of the key spiritual healing session paralleled the very elements the young woman had sought by participating in raves, an activity that was problematic because it led to family displeasure. Whereas attendance at a rave triggered illness, the healing session, sanctioned by her family and taking place in their midst, resulted in healing.

  7. DOUBLE-LINED SPECTROSCOPIC BINARY STARS IN THE RAVE SURVEY

    SciTech Connect

    Matijevic, G.; Zwitter, T.; Munari, U.; Siviero, A.; Bienayme, O.; Siebert, A.; Binney, J.; Bland-Hawthorn, J.; Boeche, C.; Steinmetz, M.; Campbell, R.; Freeman, K. C.; Gibson, B.; Gilmore, G.; Grebel, E. K.; Helmi, A.; Navarro, J. F.; Parker, Q. A.; Seabroke, G. M.; Watson, F. G.

    2010-07-15

    We devise a new method for the detection of double-lined binary stars in a sample of the Radial Velocity Experiment (RAVE) survey spectra. The method is both tested against extensive simulations based on synthetic spectra and compared to direct visual inspection of all RAVE spectra. It is based on the properties and shape of the cross-correlation function, and is able to recover {approx}80% of all binaries with an orbital period of order 1 day. Systems with periods up to 1 yr are still within the detection reach. We have applied the method to 25,850 spectra of the RAVE second data release and found 123 double-lined binary candidates, only eight of which are already marked as binaries in the SIMBAD database. Among the candidates, there are seven that show spectral features consistent with the RS CVn type (solar type with active chromosphere) and seven that might be of W UMa type (over-contact binaries). One star, HD 101167, seems to be a triple system composed of three nearly identical G-type dwarfs. The tested classification method could also be applicable to the data of the upcoming Gaia mission.

  8. Polysubstance Use Patterns in Underground Rave Attenders: A Cluster Analysis

    ERIC Educational Resources Information Center

    Fernandez-Calderon, Fermin; Lozano, Oscar M.; Vidal, Claudio; Ortega, Josefa Gutierrez; Vergara, Esperanza; Gonzalez-Saiz, Francisco; Bilbao, Izaskun; Caluente, Marta; Cano, Tomas; Cid, Francisco; Dominguez, Celia; Izquierdo, Emcarni; Perez, Maria I.

    2011-01-01

    Drug use in mainstream rave parties has been widely documented in a large number of studies. However, not much is known about drug use in underground raves. The purpose of this study is to find out the polysubstance use patterns at underground raves. Two hundred and fifty-two young people between the ages of 18 and 30 who went to underground raves…

  9. An Exploration of Recent Club Drug Use among Rave Attendees

    ERIC Educational Resources Information Center

    Yacoubian, George S.; Peters, Ronald J.

    2007-01-01

    Raves are characterized by large numbers of youth dancing for long periods of time and by the use of "club drugs," such as 3, 4-methylenedioxymethamphetamine (MDMA or "ecstasy"). While a small body of research has explored the use of ecstasy and other club drugs (EOCD) among club rave attendees in the United States, we are…

  10. EXPLORING THE MORPHOLOGY OF RAVE STELLAR SPECTRA

    SciTech Connect

    Matijevic, G.; Zwitter, T.; Bienayme, O.; Siebert, A.; Bland-Hawthorn, J.; Boeche, C.; Grebel, E. K.; Freeman, K. C.; Gibson, B. K.; Gilmore, G.; Helmi, A.; Munari, U.; Navarro, J.; Parker, Q. A.; Reid, W.; Seabroke, G.; Siviero, A.; Steinmetz, M.; Williams, M.; Watson, F. G.; and others

    2012-06-01

    The RAdial Velocity Experiment (RAVE) is a medium-resolution (R {approx} 7500) spectroscopic survey of the Milky Way that has already obtained over half a million stellar spectra. They present a randomly selected magnitude-limited sample, so it is important to use a reliable and automated classification scheme that identifies normal single stars and discovers different types of peculiar stars. To this end, we present a morphological classification of {approx}350, 000 RAVE survey stellar spectra using locally linear embedding, a dimensionality reduction method that enables representing the complex spectral morphology in a low-dimensional projected space while still preserving the properties of the local neighborhoods of spectra. We find that the majority of all spectra in the database ({approx} 90%-95%) belong to normal single stars, but there is also a significant population of several types of peculiars. Among them, the most populated groups are those of various types of spectroscopic binary and chromospherically active stars. Both of them include several thousands of spectra. Particularly the latter group offers significant further investigation opportunities since activity of stars is a known proxy of stellar ages. Applying the same classification procedure to the sample of normal single stars alone shows that the shape of the projected manifold in two-dimensional space correlates with stellar temperature, surface gravity, and metallicity.

  11. RAVE stars in K2. I. Improving RAVE red giants spectroscopy using asteroseismology from K2 Campaign 1

    NASA Astrophysics Data System (ADS)

    Valentini, M.; Chiappini, C.; Davies, G. R.; Elsworth, Y. P.; Mosser, B.; Lund, M. N.; Miglio, A.; Chaplin, W. J.; Rodrigues, T. S.; Boeche, C.; Steinmetz, M.; Matijevič, G.; Kordopatis, G.; Bland-Hawthorn, J.; Munari, U.; Bienaymé, O.; Freeman, K. C.; Gibson, B. K.; Gilmore, G.; Grebel, E. K.; Helmi, A.; Kunder, A.; McMillan, P.; Navarro, J.; Parker, Q. A.; Reid, W.; Seabroke, G.; Sharma, S.; Siviero, A.; Watson, F.; Wyse, R. F. G.; Zwitter, T.; Mott, A.

    2017-03-01

    We present a set of 87 RAVE stars with detected solar like oscillations, observed during Campaign 1 of the K2 mission (RAVE K2-C1 sample). This data set provides a useful benchmark for testing the gravities provided in RAVE data release 4 (DR4), and is key for the calibration of the RAVE data release 5 (DR5). The RAVE survey collected medium-resolution spectra (R = 7500) centred in the Ca II triplet(8600 Å) wavelength interval, which although being very useful for determining radial velocity and metallicity, even at low S/N, is known be affected by a log (g)-Teff degeneracy. This degeneracy is the cause of the large spread in the RAVE DR4 gravities for giants. The understanding of the trends and offsets that affects RAVE atmospheric parameters, and in particular log (g), is a crucial step in obtaining not only improved abundance measurements, but also improved distances and ages. In the present work, we use two different pipelines, GAUFRE and Sp_Ace, to determine atmospheric parameters and abundances by fixing log (g) to the seismic one. Our strategy ensures highly consistent values among all stellar parameters, leading to more accurate chemical abundances. A comparison of the chemical abundances obtained here with and without the use of seismic log (g) information has shown that an underestimated (overestimated) gravity leads to an underestimated (overestimated) elemental abundance (e.g. [Mg/H] is underestimated by 0.25 dex when the gravity is underestimated by 0.5 dex). We then perform a comparison between the seismic gravities and the spectroscopic gravities presented in the RAVE DR4 catalogue, extracting a calibration for log (g) of RAVE giants in the colour interval 0.50 < (J-KS) < 0.85. Finally, we show a comparison of the distances, temperatures, extinctions (and ages) derived here for our RAVE K2-C1 sample with those derived in RAVE DR4 and DR5. DR5 performs better than DR4 thanks to the seismic calibration, although discrepancies can still be important

  12. Chemical separation of disc components using RAVE

    NASA Astrophysics Data System (ADS)

    Wojno, Jennifer; Kordopatis, Georges; Steinmetz, Matthias; McMillan, Paul; Matijevič, Gal; Binney, James; Wyse, Rosemary F. G.; Boeche, Corrado; Just, Andreas; Grebel, Eva K.; Siebert, Arnaud; Bienaymé, Olivier; Gibson, Brad K.; Zwitter, Tomaž; Bland-Hawthorn, Joss; Navarro, Julio F.; Parker, Quentin A.; Reid, Warren; Seabroke, George; Watson, Fred

    2016-10-01

    We present evidence from the RAdial Velocity Experiment (RAVE) survey of chemically separated, kinematically distinct disc components in the solar neighbourhood. We apply probabilistic chemical selection criteria to separate our sample into α-low (`thin disc') and α-high (`thick disc') sequences. Using newly derived distances, which will be utilized in the upcoming RAVE DR5, we explore the kinematic trends as a function of metallicity for each of the disc components. For our α-low disc, we find a negative trend in the mean rotational velocity (Vφ) as a function of iron abundance ([Fe/H]). We measure a positive gradient ∂Vφ/∂[Fe/H] for the α-high disc, consistent with results from high-resolution surveys. We also find differences between the α-low and α-high discs in all three components of velocity dispersion. We discuss the implications of an α-low, metal-rich population originating from the inner Galaxy, where the orbits of these stars have been significantly altered by radial mixing mechanisms in order to bring them into the solar neighbourhood. The probabilistic separation we propose can be extended to other data sets for which the accuracy in [α/Fe] is not sufficient to disentangle the chemical disc components a priori. For such data sets which will also have significant overlap with Gaia DR1, we can therefore make full use of the improved parallax and proper motion data as it becomes available to investigate kinematic trends in these chemical disc components.

  13. The Radial Velocity Experiment (RAVE): Fifth Data Release

    NASA Astrophysics Data System (ADS)

    Kunder, Andrea; Kordopatis, Georges; Steinmetz, Matthias; Zwitter, Tomaž; McMillan, Paul J.; Casagrande, Luca; Enke, Harry; Wojno, Jennifer; Valentini, Marica; Chiappini, Cristina; Matijevič, Gal; Siviero, Alessandro; de Laverny, Patrick; Recio-Blanco, Alejandra; Bijaoui, Albert; Wyse, Rosemary F. G.; Binney, James; Grebel, E. K.; Helmi, Amina; Jofre, Paula; Antoja, Teresa; Gilmore, Gerard; Siebert, Arnaud; Famaey, Benoit; Bienaymé, Olivier; Gibson, Brad K.; Freeman, Kenneth C.; Navarro, Julio F.; Munari, Ulisse; Seabroke, George; Anguiano, Borja; Žerjal, Maruša; Minchev, Ivan; Reid, Warren; Bland-Hawthorn, Joss; Kos, Janez; Sharma, Sanjib; Watson, Fred; Parker, Quentin A.; Scholz, Ralf-Dieter; Burton, Donna; Cass, Paul; Hartley, Malcolm; Fiegert, Kristin; Stupar, Milorad; Ritter, Andreas; Hawkins, Keith; Gerhard, Ortwin; Chaplin, W. J.; Davies, G. R.; Elsworth, Y. P.; Lund, M. N.; Miglio, A.; Mosser, B.

    2017-02-01

    Data Release 5 (DR5) of the Radial Velocity Experiment (RAVE) is the fifth data release from a magnitude-limited (9< I< 12) survey of stars randomly selected in the Southern Hemisphere. The RAVE medium-resolution spectra (R∼ 7500) covering the Ca-triplet region (8410–8795 Å) span the complete time frame from the start of RAVE observations in 2003 to their completion in 2013. Radial velocities from 520,781 spectra of 457,588 unique stars are presented, of which 255,922 stellar observations have parallaxes and proper motions from the Tycho-Gaia astrometric solution in Gaia DR1. For our main DR5 catalog, stellar parameters (effective temperature, surface gravity, and overall metallicity) are computed using the RAVE DR4 stellar pipeline, but calibrated using recent K2 Campaign 1 seismic gravities and Gaia benchmark stars, as well as results obtained from high-resolution studies. Also included are temperatures from the Infrared Flux Method, and we provide a catalog of red giant stars in the dereddened color {(J-{Ks})}0 interval (0.50, 0.85) for which the gravities were calibrated based only on seismology. Further data products for subsamples of the RAVE stars include individual abundances for Mg, Al, Si, Ca, Ti, Fe, and Ni, and distances found using isochrones. Each RAVE spectrum is complemented by an error spectrum, which has been used to determine uncertainties on the parameters. The data can be accessed via the RAVE Web site or the VizieR database.

  14. Raves: a review of the culture, the drugs and the prevention of harm

    PubMed Central

    Weir, E

    2000-01-01

    Raves are all-night dance parties attended by large numbers of youth, sometimes in excess of 20,000. The rave scene, which is international in scope, is distinguished by clandestine venues, hypnotic electronic music and the liberal use of drugs such as ecstasy (3,4-methylenedioxymethamphetamine), GHB (gamma-hydroxybutyrate) and ketamine. Several rave-related deaths in Canada in 1999 alerted health authorities, parents and police to the health risks of rave attendance. Family physicians, emergency physicians and pediatricians should have some understanding of raves, the drugs and the health risks so they can effectively counsel and treat patients. The rave culture in Canada and the drugs commonly used at raves are reviewed, and strategies and initiatives for harm reduction are discussed. PMID:10906922

  15. Discovering system requirements

    SciTech Connect

    Bahill, A.T.; Bentz, B.; Dean, F.F.

    1996-07-01

    Cost and schedule overruns are often caused by poor requirements that are produced by people who do not understand the requirements process. This report provides a high-level overview of the system requirements process, explaining types, sources, and characteristics of good requirements. System requirements, however, are seldom stated by the customer. Therefore, this report shows ways to help you work with your customer to discover the system requirements. It also explains terminology commonly used in the requirements development field, such as verification, validation, technical performance measures, and the various design reviews.

  16. TWRSview system requirements specification

    SciTech Connect

    Caldwell, J.A.; Lee, A.K.

    1995-12-01

    This document provides the system requirements specification for the TWRSview software system. The TWRSview software system is being developed to integrate electronic data supporting the development of the TWRS technical baseline

  17. Transportation System Requirements Document

    SciTech Connect

    Not Available

    1993-09-01

    This Transportation System Requirements Document (Trans-SRD) describes the functions to be performed by and the technical requirements for the Transportation System to transport spent nuclear fuel (SNF) and high-level radioactive waste (HLW) from Purchaser and Producer sites to a Civilian Radioactive Waste Management System (CRWMS) site, and between CRWMS sites. The purpose of this document is to define the system-level requirements for Transportation consistent with the CRWMS Requirement Document (CRD). These requirements include design and operations requirements to the extent they impact on the development of the physical segments of Transportation. The document also presents an overall description of Transportation, its functions, its segments, and the requirements allocated to the segments and the system-level interfaces with Transportation. The interface identification and description are published in the CRWMS Interface Specification.

  18. Toward an Ecstasy and Other Club Drug (EOCD) Prevention Intervention for Rave Attendees

    ERIC Educational Resources Information Center

    Yacoubian, George S., Jr.; Miller, Sarah; Pianim, Selwyn; Kunz, Michael; Orrick, Erin; Link, Tanja; Palacios, Wilson R.; Peters, Ronald J.

    2004-01-01

    A growing body of recent research has identified that "rave" attendees are at high risk for the use of "club drugs," such as 3,4-methylenedioxymeth-amphetamine (MDMA or "ecstasy"). Rave attendees, however, comprise only one of several club-going populations. In the current study, we explore the prevalence of ecstasy and other club drug (EOCD) use…

  19. The RAVE/VERTIGO vertex reconstruction toolkit and framework

    NASA Astrophysics Data System (ADS)

    Waltenberger, W.; Mitaroff, W.; Moser, F.; Pflugfelder, B.; Riedel, H. V.

    2008-07-01

    A detector-independent toolkit for vertex reconstruction (RAVE1) is being developed, along with a standalone framework (VERTIGO2) for testing, analyzing and debugging. The core algorithms represent state-of-the-art for geometric vertex finding and fitting by both linear (Kalman filter) and robust estimation methods. Main design goals are ease of use, flexibility for embedding into existing software frameworks, extensibility, and openness. The implementation is based on modern object-oriented techniques, is coded in C++ with interfaces for Java and Python, and follows an open-source approach. A beta release is available.

  20. Human Systems Integration Requirements

    DTIC Science & Technology

    2009-09-01

    conditions? (Night, All Weather) 5. Is there special gear required that may impact task performance (Mission Oriented Protective Posture (MOPP...or from personal protective equipment? 21. Does the system meet vibration and shock requirements under all operational conditions? 22. Are there...11. Is the system’s ability to distinguish between friendly and enemy targets compatible with mission oriented protective posture level IV (MOPP

  1. The Radial Velocity Experiment (RAVE), a preview to what to expect from the Gaia RVS

    NASA Astrophysics Data System (ADS)

    Steinmetz, Matthias

    2015-08-01

    The Radial Velocity Experiment (RAVE) is a large wide-field spectroscopic stellar survey of the Milky Way. Over the period 2003-2013, 574,630 spectra for 483,330 stars have been amassed at a resolution of R=7500 in the Ca-triplet region of 8410-8795 Å. Wavelength coverage and resolution are thus comparable to that anticipated from the Gaia RVS. Derived data products of RAVE include radial velocities, stellar parameters, chemicals abundances for Mg, Al, Si, Ca, Ti, Fe, and Ni, and absorption measured based on the DIB at 8620 Å. Since more than 290000 RAVE targets are drawn from the Tycho-2 catalogue, RAVE will be interesting prototype for the anticipated full Gaia data releases, in particular when combined with the first Gaia data releases, in particular when combined with the early Gaia data releases, which contain astrometry but not yet stellar parameters and abundances.

  2. RAVE as a Gaia precursor: what to expect from the Gaia RVS?

    NASA Astrophysics Data System (ADS)

    Steinmetz, M.

    2014-07-01

    The Radial Velocity Experiment (RAVE) is a large wide-field spectroscopic stellar survey of the Milky Way. Over the period 2003-2013, 574,630 spectra for 483,330 stars have been amassed at a resolution of R=7500 in the Ca-triplet region of 8410-8795 Å. Wavelength coverage and resolution are thus comparable to that anticipated from the Gaia RVS. Derived data products of RAVE include radial velocities, stellar parameters, chemicals abundances for Mg, Al, Si, Ca, Ti, Fe, and Ni, and absorption measures based on the diffuse interstellar bands (DIB) at 8620 Å. Since more than 290 000 RAVE targets are drawn from the Tycho-2 catalogue, RAVE will be an interesting prototype for the anticipated full Gaia data releases, in particular when combined with the early Gaia data releases, which contain astrometry but not yet stellar parameters and abundances.

  3. Space systems requirements definition

    NASA Technical Reports Server (NTRS)

    1985-01-01

    The compilation of Scientific Data Requirements (SDRs) were based on discussions with a representative cross section of the scientific community and a selected survey of the extensive literature dealing with the measurement of CO2-induced climatic changes. This approach resulted in a baseline set of SDRs to determine what could be accomplished with space-based sensors. Twenty-three SDRs emerged as the basis for the investigation of space systems.

  4. Look before leaping: combined opioids may not be the rave.

    PubMed

    Davis, Mellar P; LeGrand, Susan B; Lagman, Ruth

    2005-10-01

    The use of combinations of potent opioids is a common clinical practice. The addition of one potent opioid to another has been recommended to reduce opioid side effects, improve pain control, and limit dose escalation of the first opioid. The advantages of using combined opioids have been reported to be relative to differences in receptor activation versus endocytosis (RAVE). However, the advantages and detriment to combining opioids are related to naturally occurring opioid receptor dimers. Dimers and oligomers result in a unique opioid pharmacodynamics which influence opioid binding, G protein interactions, desensitization, receptor trafficking, and endocytosis. The pharmacodynamics of dimers may lead to positive or negative cooperativity when two opioids are combined. The use of multiple opioids in practice can lead to increased risk for dosing errors, reduced patient compliance, increased drug interactions and cost. Opioid combinations should not be used until prospective randomized trials clarify the benefits and safety.

  5. Requirements management system browser software requirements specification

    SciTech Connect

    Frank, D.D.

    1996-10-01

    The purpose of this document is to define the essential user requirements for the Requirements Management System Browser (RMSB) application. This includes specifications for the Graphical User Interface (GUI) and the supporting database structures. The RMSB application is needed to provide an easy to use PC-based interface to browse system engineering data stored and managed in a UNIX software application. The system engineering data include functions, requirements, and architectures that make up the Tank Waste Remediation System (TWRS) technical baseline. This document also covers the requirements for a software application titled ``RMSB Data Loader (RMSB- DL)``, referred to as the ``Parser.`` The Parser is needed to read and parse a data file and load the data structure supporting the Browser.

  6. Illicit Drug Use among Rave Attendees in a Nationally Representative Sample of US High School Seniors

    PubMed Central

    Palamar, Joseph J.; Griffin-Tomas, Marybec; Ompad, Danielle C.

    2015-01-01

    Background The popularity of electronic dance music and rave parties such as dance festivals has increased in recent years. Targeted samples of party-goers suggest high rates of drug use among attendees, but few nationally representative studies have examined these associations. Methods We examined sociodemographic correlates of rave attendance and relationships between rave attendance and recent (12-month) use of various drugs in a representative US sample of high school seniors (modal age: 18) from the Monitoring the Future study (2011–2013; Weighted N= 7,373). Results One out of five students (19.8%) reported ever attending a rave, and 7.7% reported attending at least monthly. Females and highly religious students were less likely to attend raves, and Hispanics, students residing in cities, students with higher income and those who go out for fun multiple times per week were more likely to attend. Rave attendees were more likely than non-attendees to report use of an illicit drug other than marijuana (35.5% vs. 15.6%, p < .0001). Attendees were more likely to report use of each of the 18 drugs assessed, and attendees were more likely to report more frequent use (≥6 times) of each drug (ps < .0001). Controlling for sociodemographic covariates, frequent attendance (monthly or more often) was associated with higher odds of use of each drug (ps < .0001). Frequent attendees were at highest risk for use of “club drugs.” Discussion Findings from this study can help inform prevention and harm reduction among rave attendees at greatest risk for drug use. PMID:26005041

  7. SINGLE-LINED SPECTROSCOPIC BINARY STAR CANDIDATES IN THE RAVE SURVEY

    SciTech Connect

    Matijevic, G.; Zwitter, T.; Bienayme, O.; Siebert, A.; Watson, F. G.; Bland-Hawthorn, J.; Parker, Q. A.; Freeman, K. C.; Gilmore, G.; Grebel, E. K.; Helmi, A.; Munari, U.; Siviero, A.; Navarro, J. F.; Reid, W.; Seabroke, G. M.; Steinmetz, M.; Williams, M.; Wyse, R. F. G.

    2011-06-15

    Repeated spectroscopic observations of stars in the RAdial Velocity Experiment (RAVE) database are used to identify and examine single-lined binary (SB1) candidates. The RAVE latest internal database (VDR3) includes radial velocities, atmospheric parameters, and other parameters for approximately a quarter of a million different stars with slightly less than 300,000 observations. In the sample of {approx}20,000 stars observed more than once, 1333 stars with variable radial velocities were identified. Most of them are believed to be SB1 candidates. The fraction of SB1 candidates among stars with several observations is between 10% and 15% which is the lower limit for binarity among RAVE stars. Due to the distribution of time spans between the re-observation that is biased toward relatively short timescales (days to weeks), the periods of the identified SB1 candidates are most likely in the same range. Because of the RAVE's narrow magnitude range most of the dwarf candidates belong to the thin Galactic disk while the giants are part of the thick disk with distances extending to up to a few kpc. The comparison of the list of SB1 candidates to the VSX catalog of variable stars yielded several pulsating variables among the giant population with radial velocity variations of up to few tens of km s{sup -1}. There are 26 matches between the catalog of spectroscopic binary orbits (S{sub B}{sup 9}) and the whole RAVE sample for which the given periastron time and the time of RAVE observation were close enough to yield a reliable comparison. RAVE measurements of radial velocities of known spectroscopic binaries are consistent with their published radial velocity curves.

  8. Analysis of the first- and second-generation Raving Dragon Novelty Bath Salts containing methylone and pentedrone.

    PubMed

    Poklis, Justin L; Wolf, Carl E; ElJordi, Omar I; Liu, Kai; Zhang, Shijun; Poklis, Alphonse

    2015-01-01

    In recent years, a large number of designer drugs sold as "Bath Salts" have appeared on the market. In July of 2011, Raving Dragon Novelty Bath Salts was obtained over the Internet. This product became unavailable in October of that year coinciding with the DEA issuing a temporarily schedule of mephedrone, methylone, and MDPV. Four months later in February of 2012, a new product was released from the same company under the new name Raving Dragon Voodoo Dust. The contents of both products were identified using spectroscopy methods: nuclear magnetic resonance, infrared, UV-visible, tandem mass spectrometry, and high-resolution time-of-flight mass spectrometry. It was determined that Raving Dragon Novelty Bath Salts contained methylone. The replacement product Raving Dragon Voodoo Dust contained the unscheduled drug pentedrone. The Raving Dragon brand of products illustrates the rapid change of ingredients in these products to circumvent laws restricting availability, distribution, and use.

  9. APASS Landolt-Sloan BVgri photometry of Rave stars. I. Data, effective temperatures, and reddenings

    SciTech Connect

    Munari, U.; Siviero, A.; Henden, A.; Frigo, A.; Bienaymé, O.; Siebert, A.; Bland-Hawthorn, J.; Boeche, C.; Grebel, E. K.; Freeman, K. C.; Gibson, B. K.; Gilmore, G.; Kordopatis, G.; Helmi, A.; Levine, S. E.; Navarro, J. F.; Parker, Q. A.; Reid, W.; Seabroke, G. M.; and others

    2014-11-01

    We provide AAVSO Photometric All-Sky Survey (APASS) photometry in the Landolt BV and Sloan g'r'i' bands for all 425,743 stars included in the fourth RAVE Data Release. The internal accuracy of the APASS photometry of RAVE stars, expressed as the error of the mean of data obtained and separately calibrated over a median of four distinct observing epochs and distributed between 2009 and 2013, is 0.013, 0.012, 0.012, 0.014, and 0.021 mag for the B, V, g', r', and i' bands, respectively. The equally high external accuracy of APASS photometry has been verified on secondary Landolt and Sloan photometric standard stars not involved in the APASS calibration process and on a large body of literature data on field and cluster stars, confirming the absence of offsets and trends. Compared with the Carlsberg Meridian Catalog (CMC-15), APASS astrometry of RAVE stars is accurate to a median value of 0.098 arcsec. Brightness distribution functions for the RAVE stars have been derived in all bands. APASS photometry of RAVE stars, augmented by 2MASS JHK infrared data, has been χ{sup 2} fitted to a densely populated synthetic photometric library designed to widely explore temperature, surface gravity, metallicity, and reddening. Resulting T {sub eff} and E {sub B–V}, computed over a range of options, are provided and discussed, and will be kept updated in response to future APASS and RAVE data releases. In the process, we find that the reddening caused by a homogeneous slab of dust, extending for 140 pc on either side of the Galactic plane and responsible for E{sub B−V}{sup poles} = 0.036 ± 0.002 at the Galactic poles, is a suitable approximation of the actual reddening encountered at Galactic latitudes |b| ≥ 25°.

  10. APASS Landolt-Sloan BVgri Photometry of RAVE Stars. I. Data, Effective Temperatures, and Reddenings

    NASA Astrophysics Data System (ADS)

    Munari, U.; Henden, A.; Frigo, A.; Zwitter, T.; Bienaymé, O.; Bland-Hawthorn, J.; Boeche, C.; Freeman, K. C.; Gibson, B. K.; Gilmore, G.; Grebel, E. K.; Helmi, A.; Kordopatis, G.; Levine, S. E.; Navarro, J. F.; Parker, Q. A.; Reid, W.; Seabroke, G. M.; Siebert, A.; Siviero, A.; Smith, T. C.; Steinmetz, M.; Templeton, M.; Terrell, D.; Welch, D. L.; Williams, M.; Wyse, R. F. G.

    2014-11-01

    We provide AAVSO Photometric All-Sky Survey (APASS) photometry in the Landolt BV and Sloan g'r'i' bands for all 425,743 stars included in the fourth RAVE Data Release. The internal accuracy of the APASS photometry of RAVE stars, expressed as the error of the mean of data obtained and separately calibrated over a median of four distinct observing epochs and distributed between 2009 and 2013, is 0.013, 0.012, 0.012, 0.014, and 0.021 mag for the B, V, g', r', and i' bands, respectively. The equally high external accuracy of APASS photometry has been verified on secondary Landolt and Sloan photometric standard stars not involved in the APASS calibration process and on a large body of literature data on field and cluster stars, confirming the absence of offsets and trends. Compared with the Carlsberg Meridian Catalog (CMC-15), APASS astrometry of RAVE stars is accurate to a median value of 0.098 arcsec. Brightness distribution functions for the RAVE stars have been derived in all bands. APASS photometry of RAVE stars, augmented by 2MASS JHK infrared data, has been χ2 fitted to a densely populated synthetic photometric library designed to widely explore temperature, surface gravity, metallicity, and reddening. Resulting T eff and E B - V , computed over a range of options, are provided and discussed, and will be kept updated in response to future APASS and RAVE data releases. In the process, we find that the reddening caused by a homogeneous slab of dust, extending for 140 pc on either side of the Galactic plane and responsible for EpolesB-V = 0.036 ± 0.002 at the Galactic poles, is a suitable approximation of the actual reddening encountered at Galactic latitudes |b| >= 25°.

  11. γ-Hydroxybutyrate: experience of 9 years of γ-hydroxybutyrate (GHB)-related incidents during rave parties in The Netherlands.

    PubMed

    Krul, Jan; Girbes, Armand R J

    2011-04-01

    OBJECTIVE. The objective of this study was to determine the health disturbances and to assess the severity of the incidents as reported during a 9-year experience of gamma-hydroxybutyrate (GHB)-related First Aid Attendees attending First Aid Stations at rave parties. DESIGN. This study was a prospective observational study of self-referred patients from the year 2000 to 2008. During rave parties, First Aid Stations were staffed with specifically trained medical and paramedical personnel. Patients were diagnosed and treated, and data were recorded using standardized methods. RESULTS. During a 9-year period with 202 rave parties, involving approximately three million visitors, 22 604 First Aid Attendees visited the First Aid Stations, of which 771 reported GHB-related health problems. The mean age of the GHB-using First Aid Attendees was 25.7 ± 6.1 years, most of them (66.4%) were male. Approximately one-third (32.7%) of them used one substance, while 48.1% combined GHB with ecstasy, alcohol, or cannabis. One of five (19.2%) combined GHB with other substances or more than one substance. One case was categorized as severe/life-threatening and 202 (26.2%) cases as moderate, requiring further medical care. In total, 43 (5.6%) First Aid Attendees needed hospital care. The most encountered health disturbance was altered consciousness. Combinations of altered consciousness, vomiting, and/or low body temperature were found in 186 cases (24.1%) and considered to be potentially dangerous. GHB-related First Aid Attendees required a longer stay at the First Aid Stations than the total group First Aid Attendees did (median 45 min vs 10 min). CONCLUSION. We found very little, severe short-term GHB-related health disturbances during rave parties in The Netherlands. Hospital referrals were rare. The most found symptom was altered consciousness, sometimes accompanied by vomiting and low body temperature. At events where the visitors use GHB, a well-trained and qualified

  12. Requirements based system risk modeling

    NASA Technical Reports Server (NTRS)

    Meshkat, Leila; Cornford, Steven; Feather, Martin

    2004-01-01

    The problem that we address in this paper is assessing the expected degree of success of the system or mission based on the degree to which each requirement is satisfied and the relative weight of the requirements. We assume a complete list of the requirements, the relevant risk elements and their probability of occurrence and the quantified effect of the risk elements on the requirements. In order to assess the degree to which each requirement is satisfied, we need to determine the effect of the various risk elements on the requirement.

  13. SRS control system upgrade requirements

    SciTech Connect

    Hill, L.F.

    1998-08-04

    This document defines requirements for an upgrade of the Sodium Removal System (SRS) control system. The upgrade is being performed to solve a number of maintainability and operability issues. The upgraded system will provide the same functions, controls and interlocks as the present system, and in addition provide enhanced functionality in areas discussed in this document.

  14. Weighing the local dark matter with RAVE red clump stars

    NASA Astrophysics Data System (ADS)

    Bienaymé, O.; Famaey, B.; Siebert, A.; Freeman, K. C.; Gibson, B. K.; Gilmore, G.; Grebel, E. K.; Bland-Hawthorn, J.; Kordopatis, G.; Munari, U.; Navarro, J. F.; Parker, Q.; Reid, W.; Seabroke, G. M.; Siviero, A.; Steinmetz, M.; Watson, F.; Wyse, R. F. G.; Zwitter, T.

    2014-11-01

    We determine the Galactic potential in the solar neigbourhood from RAVE observations. We select red clump stars for which accurate distances, radial velocities, and metallicities have been measured. Combined with data from the 2MASS and UCAC catalogues, we build a sample of ~4600 red clump stars within a cylinder of 500 pc radius oriented in the direction of the South Galactic Pole, in the range of 200 pc to 2000 pc distances. We deduce the vertical force and the total mass density distribution up to 2 kpc away from the Galactic plane by fitting a distribution function depending explicitly on three isolating integrals of the motion in a separable potential locally representing the Galactic one with four free parameters. Because of the deep extension of our sample, we can determine nearly independently the dark matter mass density and the baryonic disc surface mass density. We find (i) at 1 kpc Kz/ (2πG) = 68.5 ± 1.0 M⊙ pc-2; and (ii) at 2 kpc Kz/ (2πG) = 96.9 ± 2.2 M⊙ pc-2. Assuming the solar Galactic radius at R0 = 8.5 kpc, we deduce the local dark matter density ρDM(z = 0) = 0.0143 ± 0.0011 M⊙pc-3 = 0.542 ± 0.042 Gev cm-3 and the baryonic surface mass density Σbar = 44.4 ± 4.1 M⊙pc-2. Our results are in agreement with previously published Kz determinations up to 1 kpc, while the extension to 2 kpc shows some evidence for an unexpectedly large amount of dark matter. A flattening of the dark halo of order 0.8 can produce such a high local density in combination with a circular velocity of 240 km s-1. It could also be consistent with a spherical cored dark matter profile whose density does not drop sharply with radius. Another explanation, allowing for a lower circular velocity, could be the presence of a secondary dark component, a very thick disc resulting either from the deposit of dark matter from the accretion of multiple small dwarf galaxies, or from the presence of an effective "phantom" thick disc in the context of effective galactic

  15. Business System Planning Project System Requirements Specification

    SciTech Connect

    NELSON, R.E.

    2000-09-08

    The purpose of the Business Systems Planning Project System Requirements Specification (SRS) is to provide the outline and contents of the requirements for the CH2M HILL Hanford Group, Inc. (CHG) integrated business and technical information systems. The SRS will translate proposed objectives into the statement of the functions that are to be performed and data and information flows that they require. The requirements gathering methodology will use (1) facilitated group requirement sessions; (2) individual interviews; (3) surveys; and (4) document reviews. The requirements will be verified and validated through coordination of the technical requirement team and CHG Managers. The SRS document used the content and format specified in Lockheed Martin Services, Inc. Organization Standard Software Practices in conjunction with the Institute of Electrical and Electronics Engineers Standard 8340-1984 for Systems Requirements Documents.

  16. Managing System of Systems Requirements with a Requirements Screening Group

    SciTech Connect

    Ronald R. Barden

    2012-07-01

    Figuring out an effective and efficient way to manage not only your Requirement’s Baseline, but also the development of all your individual requirements during a Program’s/Project’s Conceptual and Development Life Cycle Stages can be both daunting and difficult. This is especially so when you are dealing with a complex and large System of Systems (SoS) Program with potentially thousands and thousands of Top Level Requirements as well as an equal number of lower level System, Subsystem and Configuration Item requirements that need to be managed. This task is made even more overwhelming when you have to add in integration with multiple requirements’ development teams (e.g., Integrated Product Development Teams (IPTs)) and/or numerous System/Subsystem Design Teams. One solution for tackling this difficult activity on a recent large System of Systems Program was to develop and make use of a Requirements Screening Group (RSG). This group is essentially a Team made up of co-chairs from the various Stakeholders with an interest in the Program of record that are enabled and accountable for Requirements Development on the Program/Project. The RSG co-chairs, often with the help of individual support team, work together as a Program Board to monitor, make decisions on, and provide guidance on all Requirements Development activities during the Conceptual and Development Life Cycle Stages of a Program/Project. In addition, the RSG can establish and maintain the Requirements Baseline, monitor and enforce requirements traceability across the entire Program, and work with other elements of the Program/Project to ensure integration and coordination.

  17. [Raves and drug use from an epidemiologic and psychosocial approach: a bibliographic systematic review].

    PubMed

    Fernández-Calderón, Fermín; Lozano-Rojas, Óscar M; Rojas-Tejada, Antonio J

    2013-01-01

    The high drug use that occurs at raves and the specific characteristics of these parties make them a high risk recreational context the health of participants. The aim of this paper is to establish a categorization of research on drug use and raves according to their objectives and main results. Knowledge and research needs identified as a result of this review are discussed. To this end, a systematic review of scientific literature through Medline, Psycinfo and Psicodoc was conducted. After applying the inclusion criteria, 36 papers were obtained, classified into six categories. The results show that 23 studies aim psychosocial profile analysis, and the prevalence and patterns of drug use. Nine studies focus on risks related to drug use, and nine in the drug effects. Given the high risk associated with raves and the scarcity of empirical studies identified, the need to develop further empirical studies is addressed. There is still insufficient evidence to guide intervention strategies to prevent risks and harms among ravers. There is also a need to explore: polydrug use, harm reduction strategies, positive effects and motivations.

  18. Johnson Noise Thermometry System Requirements

    SciTech Connect

    Britton Jr, Charles L; Roberts, Michael; Ezell, N Dianne Bull; Qualls, A L; Holcomb, David Eugene

    2013-01-01

    This document is intended to capture the requirements for the architecture of the developmental electronics for the ORNL-lead drift-free Johnson Noise Thermometry (JNT) project conducted under the Instrumentation, Controls, and Human-Machine Interface (ICHMI) research pathway of the U.S. Department of Energy (DOE) Advanced Small Modular Reactor (SMR) Research and Development (R&D) program. The requirements include not only the performance of the system but also the allowable measurement environment of the probe and the allowable physical environment of the associated electronics. A more extensive project background including the project rationale is available in the initial project report [1].

  19. Chemical gradients in the Milky Way from the RAVE data. I. Dwarf stars

    NASA Astrophysics Data System (ADS)

    Boeche, C.; Siebert, A.; Piffl, T.; Just, A.; Steinmetz, M.; Sharma, S.; Kordopatis, G.; Gilmore, G.; Chiappini, C.; Williams, M.; Grebel, E. K.; Bland-Hawthorn, J.; Gibson, B. K.; Munari, U.; Siviero, A.; Bienaymé, O.; Navarro, J. F.; Parker, Q. A.; Reid, W.; Seabroke, G. M.; Watson, F. G.; Wyse, R. F. G.; Zwitter, T.

    2013-11-01

    Aims: We aim at measuring the chemical gradients of the elements Mg, Al, Si, and Fe along the Galactic radius to provide new constraints on the chemical evolution models of the Galaxy and Galaxy models such as the Besançon model. Thanks to the large number of stars of our RAVE sample we can study how the gradients vary as function of the distance from the Galactic plane. Methods: We analysed three different samples selected from three independent datasets: a sample of 19 962 dwarf stars selected from the RAVE database, a sample of 10 616 dwarf stars selected from the Geneva-Copenhagen Survey (GCS) dataset, and a mock sample (equivalent to the RAVE sample) created by using the GALAXIA code, which is based on the Besançon model. The three samples were analysed by using the very same method for comparison purposes. We integrated the Galactic orbits and obtained the guiding radii (Rg) and the maximum distances from the Galactic plane reached by the stars along their orbits (Zmax). We measured the chemical gradients as functions of Rg at different Zmax. Results: We found that the chemical gradients of the RAVE and GCS samples are negative and show consistent trends, although they are not equal: at Zmax< 0.4 kpc and 4.5 RAVE sample is d [Fe/H] /dRg = -0.065 dex kpc-1, whereas for the GCS sample it is d [Fe/H] /dRg = -0.043 dex kpc-1 with internal errors of ±0.002 and ±0.004 dex kpc-1, respectively. The gradients of the RAVE and GCS samples become flatter at larger Zmax. Conversely, the mock sample has a positive iron gradient of d [Fe/H] /dRg = +0.053 ± 0.003 dex kpc-1 at Zmax< 0.4 kpc and remains positive at any Zmax. These positive and unrealistic values originate from the lack of correlation between metallicity and tangential velocity in the Besançon model. In addition, the low metallicity and asymmetric drift of the thick disc causes a shift of the stars towards lower Rg and metallicity which, together with the thin

  20. Expert system requirements for power system restoration

    SciTech Connect

    Adibi, M.M. ); Kafka, R.J. ); Milanicz, D.P. )

    1994-08-01

    This paper is one of series presented on behalf of the System Operation Subcommittee with the intent of focusing industry attention on power system restoration. Expert systems are being considered for restoring bulk power supplies. In general, there are three restoration periods following a major power disturbance: establishment of initial sources of power, re-integration of a skeleton of the bulk power supply, and minimization of the unserved loads. Expert systems together with analytical tools have the potential of addressing the restoration procedures over these three periods. This paper describes the expert system requirements from the point of view of the practicing power engineers with emphasis placed on the initial power sources and requirements. The paper draws on the previous reports by the Power System Restoration Working Group.

  1. Flight Guidance System Requirements Specification

    NASA Technical Reports Server (NTRS)

    Miller, Steven P.; Tribble, Alan C.; Carlson, Timothy M.; Danielson, Eric J.

    2003-01-01

    This report describes a requirements specification written in the RSML-e language for the mode logic of a Flight Guidance System of a typical regional jet aircraft. This model was created as one of the first steps in a five-year project sponsored by the NASA Langley Research Center, Rockwell Collins Inc., and the Critical Systems Research Group of the University of Minnesota to develop new methods and tools to improve the safety of avionics designs. This model will be used to demonstrate the application of a variety of methods and techniques, including safety analysis of system and subsystem requirements, verification of key properties using theorem provers and model checkers, identification of potential sources mode confusion in system designs, partitioning of applications based on the criticality of system hazards, and autogeneration of avionics quality code. While this model is representative of the mode logic of a typical regional jet aircraft, it does not describe an actual or planned product. Several aspects of a full Flight Guidance System, such as recovery from failed sensors, have been omitted, and no claims are made regarding the accuracy or completeness of this specification.

  2. Symmetric States Requiring System Asymmetry

    NASA Astrophysics Data System (ADS)

    Nishikawa, Takashi; Motter, Adilson E.

    2016-09-01

    Spontaneous synchronization has long served as a paradigm for behavioral uniformity that can emerge from interactions in complex systems. When the interacting entities are identical and their coupling patterns are also identical, the complete synchronization of the entire network is the state inheriting the system symmetry. As in other systems subject to symmetry breaking, such symmetric states are not always stable. Here, we report on the discovery of the converse of symmetry breaking—the scenario in which complete synchronization is not stable for identically coupled identical oscillators but becomes stable when, and only when, the oscillator parameters are judiciously tuned to nonidentical values, thereby breaking the system symmetry to preserve the state symmetry. Aside from demonstrating that diversity can facilitate and even be required for uniformity and consensus, this suggests a mechanism for convergent forms of pattern formation in which initially asymmetric patterns evolve into symmetric ones.

  3. Paradoxical relationship between RAVE (relative activity versus endocytosis) values of several opioid receptor agonists and their liability to cause dependence

    PubMed Central

    Wang, Yu-hua; Sun, Jian-feng; Tao, Yi-min; Xu, Xue-jun; Chi, Zhi-qiang; Liu, Jing-gen

    2010-01-01

    Aim: To examine the relationship between the RAVE (relative activity versus endocytosis) values of opiate agonists and their dependence liability by studying several potent analgesics with special profiles in the development of physical and psychological dependence. Methods: The effects of (−)-cis-(3R,4S,2′R) ohmefentanyl (F9202), (+)-cis-(3R,4S,2′S) ohmefentanyl (F9204), dihydroetorphine (DHE) and morphine on [35S]GTPγS binding, forskolin-stimulated cAMP accumulation, and receptor internalization were studied in CHO cells stably expressing HA-tagged μ-opioid receptors (CHO-HA-MOR). cAMP overshoot in response to the withdrawal of these compound treatments was also tested. Results: All four agonists exhibited the same rank order of activity in stimulation of [35S]GTPγS binding, inhibition of adenylyl cyclase (AC) and induction of receptor internalization: DHE>F9204>F9202>morphine. Based on these findings and the previous in vivo analgesic data obtained from our and other laboratories, the RAVE values of the four agonists were calculated. The rank order of RAVE values was morphine>F9202>F9204>DHE. For the induction of cAMP overshoot, the rank order was F9202≥morphine>F9204≥DHE. Conclusion: Taken in combination with previous findings of these compounds' liability to develop dependence, the present study suggests that the agonist with the highest RAVE value seems to have a relatively greater liability to develop psychological dependence relative to the agonist with the lowest RAVE value. However, the RAVE values of these agonists are not correlated with their probability of developing physical dependence or inducing cAMP overshoot, a cellular hallmark of dependence. PMID:20228826

  4. Chromospherically Active Stars in the RAVE Survey. II. Young Dwarfs in the Solar Neighborhood

    NASA Astrophysics Data System (ADS)

    Žerjal, M.; Zwitter, T.; Matijevič, G.; Grebel, E. K.; Kordopatis, G.; Munari, U.; Seabroke, G.; Steinmetz, M.; Wojno, J.; Bienaymé, O.; Bland-Hawthorn, J.; Conrad, C.; Freeman, K. C.; Gibson, B. K.; Gilmore, G.; Kunder, A.; Navarro, J.; Parker, Q. A.; Reid, W.; Siviero, A.; Watson, F. G.; Wyse, R. F. G.

    2017-01-01

    A large sample of over 38,000 chromospherically active candidate solar-like stars and cooler dwarfs from the RAVE survey is addressed in this paper. An improved activity identification with respect to the previous study was introduced to build a catalog of field stars in the solar neighborhood with an excess emission flux in the calcium infrared triplet wavelength region. The central result of this work is the calibration of the age–activity relation for main-sequence dwarfs in a range from a few 10 {Myr} up to a few Gyr. It enabled an order of magnitude age estimation of the entire active sample. Almost 15,000 stars are shown to be younger than 1 {Gyr} and ∼2000 younger than 100 {Myr}. The young age of the most active stars is confirmed by their position off the main sequence in the J ‑ K versus {N}{UV}-V diagram showing strong ultraviolet excess, mid-infrared excess in the J ‑ K versus {W}1-{W}2 diagram, and very cool temperatures (J-K> 0.7). They overlap with the reference pre-main-sequence RAVE stars often displaying X-ray emission. The activity level increasing with the color reveals their different nature from the solar-like stars and probably represents an underlying dynamo-generating magnetic fields in cool stars. Of the RAVE objects from DR5, 50% are found in the TGAS catalog and supplemented with accurate parallaxes and proper motions by Gaia. This makes the database of a large number of young stars in a combination with RAVE’s radial velocities directly useful as a tracer of the very recent large-scale star formation history in the solar neighborhood. The data are available online in the Vizier database.

  5. Identification of globular cluster stars in RAVE data - I. Application to stellar parameter calibration

    NASA Astrophysics Data System (ADS)

    Anguiano, B.; Zucker, D. B.; Scholz, R.-D.; Grebel, E. K.; Seabroke, G.; Kunder, A.; Binney, J.; McMillan, P. J.; Zwitter, T.; Wyse, R. F. G.; Kordopatis, G.; Bienaymé, O.; Bland-Hawthorn, J.; Boeche, C.; Freeman, K. C.; Gibson, B. K.; Gilmore, G.; Munari, U.; Navarro, J.; Parker, Q.; Reid, W.; Siebert, A.; Siviero, A.; Steinmetz, M.; Watson, F.

    2015-08-01

    We present the identification of potential members of nearby Galactic globular clusters using radial velocities from the RAdial Velocity Experiment Data Release 4 (RAVE-DR4) survey data base. Our identifications are based on three globular clusters - NGC 3201, NGC 5139 (ω Cen) and NGC 362 - all of which are shown to have ∣RV∣ > 100 km s-1. The high radial velocity of cluster members compared to the bulk of surrounding disc stars enables us to identify members using their measured radial velocities, supplemented by proper motion information and location relative to the tidal radius of each cluster. The identification of globular cluster stars in RAVE DR4 data offers a unique opportunity to test the precision and accuracy of the stellar parameters determined with the currently available Stellar Parameter Pipelines used in the survey, as globular clusters are ideal test-beds for the validation of stellar atmospheric parameters, abundances, distances and ages. For both NGC 3201 and ω Cen, there is compelling evidence for numerous members (>10) in the RAVE data base; in the case of NGC 362 the evidence is more ambiguous, and there may be significant foreground and/or background contamination in our kinematically selected sample. A comparison of the RAVE-derived stellar parameters and abundances with published values for each cluster and with BASTI isochrones for ages and metallicities from the literature reveals overall good agreement, with the exception of the apparent underestimation of surface gravities for giants, in particular for the most metal-poor stars. Moreover, if the selected members are part of the main body of each cluster our results would also suggest that the distances from Binney et al., where only isochrones more metal rich than -0.9 dex were used, are typically underestimated by ˜40 per cent with respect to the published distances for the clusters, while the distances from Zwitter et al. show stars ranging from 1 to ˜6.5 kpc - with

  6. CLASSIFICATION OF FIELD DWARFS AND GIANTS IN RAVE AND ITS USE IN STELLAR STREAM DETECTION

    SciTech Connect

    Klement, R. J.; Bailer-Jones, C. A. L.; Rix, H.-W.; Smith, K. W.; Fuchs, B. E-mail: fuchs@ari.uni-heidelberg.de

    2011-01-10

    Samples of bright stars, as they emerge from surveys such as RAVE, contain comparable fractions of dwarf and giant stars. An efficient separation of these two luminosity classes is therefore important, especially for studies in which distances are estimated through photometric parallax relations. We use the available spectroscopic log g estimates from the second RAVE data release (DR2) to assign each star a probability for being a dwarf or subgiant/giant based on mixture model fits to the log g distribution in different color bins. We further attempt to use these stars as a labeled training set in order to classify stars which lack log g estimates into dwarfs and giants with a Support Vector Machine algorithm. We assess the performance of this classification against different choices of the input feature vector. In particular, we use different combinations of reduced proper motions, 2MASS JHK, DENIS IJK, and USNO-B B2R2 apparent magnitudes. Our study shows that-for our color ranges-the infrared bands alone provide no relevant information to separate dwarfs and giants. Even when optical bands and reduced proper motions are added, the fraction of true giants classified as dwarfs (the contamination) remains above 20%. Using only the dwarfs with available spectroscopic log g and distance estimates (the latter from Breddels et al.), we then repeat the stream search by Klementet al. (KFR08), which assumed that all stars were dwarfs and claimed the discovery of a new stellar stream at V {approx} -160 km s{sup -1} in a sample of 7015 stars from RAVE DR1. The existence of the KFR08 stream has been supported by two recent studies using other independent data sets. Our re-analysis of the pure DR2 dwarf sample exhibits an overdensity of five stars at the phase-space position of the KFR08 stream, with a metallicity distribution that appears inconsistent with that of stars at comparably low rotational velocities. Compared to several smooth Milky Way models, the mean standardized

  7. The Requirements Generation System: A tool for managing mission requirements

    NASA Technical Reports Server (NTRS)

    Sheppard, Sylvia B.

    1994-01-01

    Historically, NASA's cost for developing mission requirements has been a significant part of a mission's budget. Large amounts of time have been allocated in mission schedules for the development and review of requirements by the many groups who are associated with a mission. Additionally, tracing requirements from a current document to a parent document has been time-consuming and costly. The Requirements Generation System (RGS) is a computer-supported cooperative-work tool that assists mission developers in the online creation, review, editing, tracing, and approval of mission requirements as well as in the production of requirements documents. This paper describes the RGS and discusses some lessons learned during its development.

  8. Addicted to Democracy: "South Park" and the Salutary Effects of Agitation (Reflections of a Ranting and Raving "South Park" Junkie)

    ERIC Educational Resources Information Center

    Bruna, Katherine Richardson

    2004-01-01

    This article presents reflections of a ranting and raving "South Park" junkie. The church the author goes to is Unitarian Universalist (UU). UUism is the religion for people who don't believe in religion but somehow feel the need to regularly assemble in a religious tradition and affirm their nontraditional religiosity. From what the author can…

  9. Advanced EVA system design requirements study

    NASA Technical Reports Server (NTRS)

    1986-01-01

    Design requirements and criteria for the Space Station Advanced Extravehicular Activity System (EVAS) including crew enclosures, portable life support systems, maneuvering propulsion systems, and related extravehicular activity (EVA) support equipment were defined and established. The EVA mission requirements, environments, and medical and physiological requirements, as well as opertional, procedures, and training issues were considered.

  10. Taking the Pulse of a River System: Research on the Upper Mississippi River System

    USGS Publications Warehouse

    Sauer, Jennifer; Johnson, Barry

    2009-01-01

    Mark Twain raved about the Mississippi River basin as, 'the body of the Nation'. The 'upper body', upstream of the confluence with the Ohio River, includes commercially navigable reaches and branching tributaries that are recreationally and environmentally important. Together they feed and shelter an array of fish and wildlife in their flowing channels, floodplain lakes, backwaters, wetlands, and floodplain forests. Effective river management requires knowledge about factors controlling the dynamics and interactions of important ecosystem components. The Long Term Resource Monitoring Program (LTRMP) is the prized diagnostic tool in the Environmental Management Program for the Upper Mississippi River System that provides critical information about the status and trends of key environmental resources.

  11. "Partying" hard: party style, motives for and effects of MDMA use at rave parties.

    PubMed

    M ter Bogt, Tom F; Engels, Rutger C M E

    2005-01-01

    This study examines motives for and consequences of MDMA use at different types of dance parties in the Netherlands (2001 and 2002). Participants were 490 visitors of three different types of rave parties, "club/mellow," "trance/mainstream," and "hardcore" (34% female, mean age 22.3 years, 76.5% MDMA users). Partygoers are motivated primarily by the energetic and euphoric effects they expect from MDMA. Quantity of MDMA use is associated with hardcore and trance/mainstream party style, with the motives of euphoria, sexiness, self-insight, and sociability/flirtatiousness (negative), and with gender, educational level (negative), and MDMA use by friends. Women report more (acute) negative effects--depression, confusion, loss of control, suspiciousness, edginess, nausea, dizziness--than men; and in particular, women who are motivated to cope with their problems by using MDMA are at risk. Men's polydrug use and notably their motivation to conform to friends by using MDMA are associated with negative effects.

  12. Identifying Bright Carbon-Enhanced Metal-Poor Stars in the RAVE Catalog

    NASA Astrophysics Data System (ADS)

    Placco, Vinicius; Beers, Timothy C.

    2016-01-01

    Bright metal-poor stars are of great importance for high-resolution spectroscopic follow-up, since their brightness allows for detailed studies of the chemical compositions of their atmospheres, obtainable with short integration times on 4m-8m class telescopes. We have carried out a medium-resolution spectroscopic follow-up survey of very metal-poor ([Fe/H] < -2.0) stars selected from the RAVE catalog.Over the course of four semesters we observed over 1,200 stars with the Gemini North, Gemini South, SOAR, KPNO/Mayall, and ESO/NTT telescopes. These spectra are used to confirm the estimated atmospheric parameters from RAVE, as well as to determine [C/Fe], using our spectroscopic analysis pipeline. This information has already enabled the identification of many new carbon-enhanced metal-poor (CEMP) stars, including representatives of the inner- and outer-halo populations of the Milky Way, for which high-resolution spectroscopy is in progress from the ground with the Magellan/Clay Telescope and with the South African Large Telescope (SALT). The most interesting stars from the high-resolution follow-up will be observed from space with HST/STIS or COS. In this talk I will present the results of the medium-resolution follow-up, and preliminary results from the high-resolution effort.We acknowledge partial support from the grant PHY 14-30152; Physics Frontier Center/JINA Center for the Evolution of the Elements (JINA-CEE), awarded by the US National Science Foundation.

  13. CHROMOSPHERICALLY ACTIVE STARS IN THE RADIAL VELOCITY EXPERIMENT (RAVE) SURVEY. I. THE CATALOG

    SciTech Connect

    Žerjal, M.; Zwitter, T.; Matijevič, G.; Strassmeier, K. G.; Siviero, A.; Steinmetz, M.; Bienaymé, O.; Bland-Hawthorn, J.; Boeche, C.; Grebel, E. K.; Freeman, K. C.; Kordopatis, G.; Munari, U.; Navarro, J. F.; Parker, Q. A.; Reid, W.; Seabroke, G.; Wyse, R. F. G.

    2013-10-20

    RAVE, the unbiased magnitude limited survey of southern sky stars, contained 456,676 medium-resolution spectra at the time of our analysis. Spectra cover the Ca II infrared triplet (IRT) range, which is a known indicator of chromospheric activity. Our previous work classified all spectra using locally linear embedding. It identified 53,347 cases with a suggested emission component in calcium lines. Here, we use a spectral subtraction technique to measure the properties of this emission. Synthetic templates are replaced by the observed spectra of non-active stars to bypass the difficult computations of non-local thermal equilibrium profiles of the line cores and stellar parameter dependence. We derive both the equivalent width of the excess emission for each calcium line on a 5 Å wide interval and their sum EW{sub IRT} for ∼44,000 candidate active dwarf stars with signal-to-noise ratio >20, with no cuts on the basis of the source of their emission flux. From these, ∼14,000 show a detectable chromospheric flux with at least a 2σ confidence level. Our set of active stars vastly enlarges previously known samples. Atmospheric parameters and, in some cases, radial velocities of active stars derived from automatic pipelines suffer from systematic shifts due to their shallower calcium lines. We re-estimate the effective temperature, metallicity, and radial velocities for candidate active stars. The overall distribution of activity levels shows a bimodal shape, with the first peak coinciding with non-active stars and the second with the pre-main-sequence cases. The catalog will be made publicly available with the next RAVE public data releases.

  14. Land mobile satellite system requirements

    NASA Technical Reports Server (NTRS)

    Kiesling, J. D.

    1983-01-01

    A Land Mobile Satellite System (LMSS) provides voice, data and related communications services to moving vehicles and persons. Communications between the mobiles and satellite are in the 806-890 MHz band. The satellite translates these signals to a ""fixed services band'' such as 14/12 GHz band (Ku-band), and communicates in this band with fixed terminals called gateways. The gateways are located at convenient places such as telephone switches (which provide entry into the national telephone system), dispatcher headquarters, computer centers, etc. Communications are therefore principally mobile to fixed. A third communications link, also at Ku-band, is needed between the satellite and a single fixed ground station. This link provides satellite command, telemetry and ranging and also provides a network control function. The latter, through a common signalling system, receives requests and assigns channel slots, and otherwise controls, monitors and polices the network and collects billing information.

  15. Requirements based system level risk modeling

    NASA Technical Reports Server (NTRS)

    Meshkat, Leila; Cornford, Steven; Feather, Martin

    2004-01-01

    The problem that we address in this paper is assessing the expected degree of success of the system or mission based on the degree to which each requirement is satisfied and the relative weight of the requirements.

  16. Methodology requirements for intelligent systems architecture

    NASA Technical Reports Server (NTRS)

    Grant, Terry; Colombano, Silvano

    1987-01-01

    The methodology required for the development of the 'intelligent system architecture' of distributed computer systems which integrate standard data processing capabilities with symbolic processing to provide powerful and highly autonomous adaptive processing capabilities must encompass three elements: (1) a design knowledge capture system, (2) computer-aided engineering, and (3) verification and validation metrics and tests. Emphasis must be put on the earliest possible definition of system requirements and the realistic definition of allowable system uncertainties. Methodologies must also address human factor issues.

  17. The disk-halo interface of the Milky Way as observed with the Radial Velocity Experiment (RAVE)

    NASA Astrophysics Data System (ADS)

    Steinmetz, Matthias

    2015-08-01

    The Radial Velocity Experiment (RAVE) is the largest wide-field spectroscopic stellar survey of the Milky Way in the pre-Gaia era. Over the period of 2003-2013, 574,630 spectra for 483,330 stars have been amassed in the Ca triplet region at 8410-8795 Å with resolving power R ~ 7500. Spectral range and resolution are comparable to the RVS unit of the Gaia Satellite. Radial velocities at 2km/s accuracy have been derived as well as stellar parameters and chemical abundances for Mg, Al, Si, Ca, Ti, Fe, and Ni. Furthermore, distances have been derived by combining RAVE data with 2MASS and APASS photometry.RAVE data have been applied to a multitude of questions regarding the dynamical and chemical evolution of the Milky Way. In this presentation I will focus on the interface between the thin and thick disk(s) and the Galactic halo, respectively, presenting data on systematic changes in abundence and alpha enrichment of the respectice stellar population with their kinematical properties (rotation velocity, velocity dispersion) out to distances of several kpc from the Sun. Furthermore, systematic changes in the chemical gradients will be presented. An analysis of high velocity stars reveals that while most have abundance properties typical for halo stars, a few stars have more disk-like chemical abundance pattern indicative of that these stars were formed in the disk but later on ejected into the stellar halo.

  18. Teleoperators - Manual/automatic system requirements.

    NASA Technical Reports Server (NTRS)

    Janow, C.; Malone, T. B.

    1973-01-01

    The teleoperator is defined as a remotely controlled, cybernetic, man-machine system designed to extend and augment man's sensory, manipulative, and cognitive capabilities. The teleoperator system incorporates the decision making, adaptive intelligence without requiring its presence. The man and the machine work as a team, each contributing unique and significant capabilities, and each depending on the other to achieve a common goal. Some of the more significant requirements associated with the development of teleoperator systems technology for space, industry, and medicine are examined. Emphasis is placed on the requirement to more effectively use the man and the machine in any man-machine system.

  19. Control requirements for future battery systems

    NASA Technical Reports Server (NTRS)

    Masson, J. H.

    1983-01-01

    It is argued that sophisticated battery control systems are required to support the high power, high energy spacecraft secondary battery systems of the post 1985 time period. Four categories of battery control system functions are defined and discussed: battery operational control, auxiliary system control, battery system status indication and fault detection fault isolation. A concept for implementation of such a control system is also presented and discussed.

  20. MONITORED GEOLOGIC REPOSITORY SYSTEMS REQUIREMENTS DOCUMENT

    SciTech Connect

    V. Trebules

    2006-06-02

    This document establishes the Monitored Geologic Repository system requirements for the U.S. Department of Energy's (DOE's) Civilian Radioactive Waste Management System (CRWMS). These requirements are based on the ''Civilian Radioactive Waste Management System Requirements Document'' (CRD) (DOE 2004a). The ''Monitored Geologic Repository Systems Requirements Document'' (MGR-RD) is developed in accordance with LP-3.3 SQ-OCRWM, ''Preparation, Review, and Approval of Office of Repository Development Requirements Document''. As illustrated in Figure 1, the MGR-RD forms part of the DOE Office of Civilian Radioactive Waste Management Technical Requirements Baseline. Revision 0 of this document identifies requirements for the current phase of repository design that is focused on developing a preliminary design for the repository and will be included in the license application submitted to the U.S. Nuclear Regulatory Commission for a repository at Yucca Mountain in support of receiving a construction authorization and subsequent operating license. As additional information becomes available, more detailed requirements will be identified in subsequent revisions to this document.

  1. Requirements for CEC POP Machine Protection System

    SciTech Connect

    Pinayev, I.

    2015-02-18

    The requirements of CEC POP machine protection system are meant to prevent damage to a vacuum chamber by a missteered electron beam. In this example, beam energy = 22 MeV, Maximal bunch charge = 5 nC, Maximal repetition rate = 78 kHz, Normalized emittance = 5 mm mrad, Minimal β-function = 1 m. From this information the requirements of the protection system can be calculated by factoring the information into equations to find beam densities and temperature excursions.

  2. Security requirements in EHR systems and archives.

    PubMed

    Ruotsalainen, Pekka

    2004-01-01

    EHR system is a system for recording, retrieving, and manipulating information in electronic health care records. Archive is an organisation that intends to preserve health records for access and use for an identified group of consumers. There exist many combinations of EHR-systems and archives. EHR-system can be a single on-line system with integrated archiving functions or archive and EHR-system are co-operative or federated systems. This paper describes both common security requirements for EHR-systems and archives and security requirement specific for archives. Requirements are derived from ethical and legal principles. From principles a set of security requirements are derived. Safeguards for implementing security are discussed. In practise EHR-system and archive share many security services. This document is proposing that inside a security domain both the archive and EHR-system have a common security policy. In addition to this the archiving organisation needs a documented policy for information preserving and a policy for access and distribution of information between other archives.

  3. Online mass storage system detailed requirements document

    NASA Technical Reports Server (NTRS)

    1976-01-01

    The requirements for an online high density magnetic tape data storage system that can be implemented in a multipurpose, multihost environment is set forth. The objective of the mass storage system is to provide a facility for the compact storage of large quantities of data and to make this data accessible to computer systems with minimum operator handling. The results of a market survey and analysis of candidate vendor who presently market high density tape data storage systems are included.

  4. Ecstasy overdoses at a New Year's Eve rave--Los Angeles, California, 2010.

    PubMed

    2010-06-11

    Ecstasy (3,4-methylenedioxymethamphetamine [MDMA]) is an illegal synthetic amphetamine used as a stimulant and hallucinogen. On January 4, 2010, the Los Angeles County (LAC) Department of Public Health (DPH) learned of six MDMA-related emergency department (ED) visits and one death, all linked to a New Year's Eve event attended by approximately 45,000 persons. LAC DPH conducted an investigation to search for additional MDMA-related ED visits, characterize the cases, and determine whether drug contamination was involved. This report summarizes the results of the investigation, which determined that 18 patients visited EDs in LAC for MDMA-related illness within 12 hours of the rave. All were aged 16-34 years, and nine were female. In addition to using MDMA, 10 of the 18 had used alcohol, and five had used other drugs. Three patients were admitted to the hospital, including one to intensive care. A tablet obtained from one of the patients contained MDMA and caffeine, without known toxic contaminants. The cluster of apparent ecstasy overdoses occurred in the context of likely increasing MDMA use in the county during 2005-2009, as indicated by increased identification of MDMA-containing forensic specimens and a large increase in LAC residents entering drug treatment programs for MDMA. Collaboration between public health, police, fire, and emergency medical service (EMS) officials on a comprehensive prevention strategy might reduce the number of overdoses at similar events.

  5. Nuclear Space Power Systems Materials Requirements

    SciTech Connect

    Buckman, R.W. Jr.

    2004-02-04

    High specific energy is required for space nuclear power systems. This generally means high operating temperatures and the only alloy class of materials available for construction of such systems are the refractory metals niobium, tantalum, molybdenum and tungsten. The refractory metals in the past have been the construction materials selected for nuclear space power systems. The objective of this paper will be to review the past history and requirements for space nuclear power systems from the early 1960's through the SP-100 program. Also presented will be the past and present status of refractory metal alloy technology and what will be needed to support the next advanced nuclear space power system. The next generation of advanced nuclear space power systems can benefit from the review of this past experience. Because of a decline in the refractory metal industry in the United States, ready availability of specific refractory metal alloys is limited.

  6. Translation of User Needs to System Requirements

    DTIC Science & Technology

    2009-03-01

    written under the premise that the current state of the art of system development does not warrant or support a formal standards document.” Experience...1992). C4I for the warrior. Washington, D.C. Carson, R., Aslaksen, E., Caple, G., Davies, P., Griego , R., Kohl, R., et al. (2004). Requirements...Hilliard, R. (2004). ANSI/IEEE 1471 and systems engineering. Systems Engineering Journal, 7(3), 257-270. Maier, M., & Rechtin, E. (2002). The art of

  7. Requirements development for a patient computing system.

    PubMed Central

    Wald, J. S.; Pedraza, L. A.; Reilly, C. A.; Murphy, M. E.; Kuperman, G. J.

    2001-01-01

    Critical parts of the software development life cycle are concerned with eliciting, understanding, and managing requirements. Though the literature on this subject dates back for several decades, practicing effective requirements development remains a current and challenging area. Some projects flourish with a requirements development process (RDP) that is implicit and informal, but this approach may be overly risky, particularly for large projects that involve multiple individuals, groups, and systems over time. At Partners HealthCare System in Boston, Massachusetts, we have applied a more formal approach for requirements development to the Patient Computing Project. The goal of the project is to create web-based software that connects patients electronically with their physician's offices and has the potential to improve care efficiency and quality. It is a large project, with over 500 function points. Like most technological innovation, the successful introduction of this system requires as much attention to understanding the business needs and workflow details as it does to technical design and implementation. This paper describes our RDP approach, and key business requirements discovered through this process. We believe that a formal RDP is essential, and that informatics as a field must include proficiencies in this area. PMID:11825282

  8. Energy requirements in pressure irrigation systems

    NASA Astrophysics Data System (ADS)

    Sánchez, R.; Rodríguez-Sinobas, L.; Juana, L.; Laguna, F. V.; Castañón, G.; Gil, M.; Benítez, J.

    2012-04-01

    Modernization of irrigation schemes, generally understood as transformation of surface irrigation systems into pressure -sprinkler and trickle- irrigation systems, aims at, among others, improving irrigation efficiency and reduction of operation and maintenance efforts made by the irrigators. However, pressure irrigation systems, in contrast, carry a serious energy cost. Energy requirements depend on decisions taken on management strategies during the operation phase, which are conditioned by previous decisions taken on the design project of the different elements which compose the irrigation system. Most of the countries where irrigation activity is significant bear in mind that modernization irrigation must play a key role in the agricultural infrastructure policies. The objective of this study is to characterize and estimate the mean and variation of the energy consumed by common types of irrigation systems and their management possibilities. The work includes all processes involved from the diversion of water into irrigation specific infrastructure to water discharge by the emitters installed on the crop fields. Simulation taking into account all elements comprising the irrigation system has been used to estimate the energy requirements of typical irrigation systems of several crop production systems. It has been applied to extensive and intensive crop systems, such us extensive winter crops, summer crops and olive trees, fruit trees and vineyards and intensive horticulture in greenhouses. The simulation of various types of irrigation systems and management strategies, in the framework imposed by particular cropping systems, would help to develop criteria for improving the energy balance in relation to the irrigation water supply productivity.

  9. Civilian Radioactive Waste Management System Requirements Document

    SciTech Connect

    C.A. Kouts

    2006-05-10

    The CRD addresses the requirements of Department of Energy (DOE) Order 413.3-Change 1, ''Program and Project Management for the Acquisition of Capital Assets'', by providing the Secretarial Acquisition Executive (Level 0) scope baseline and the Program-level (Level 1) technical baseline. The Secretarial Acquisition Executive approves the Office of Civilian Radioactive Waste Management's (OCRWM) critical decisions and changes against the Level 0 baseline; and in turn, the OCRWM Director approves all changes against the Level 1 baseline. This baseline establishes the top-level technical scope of the CRMWS and its three system elements, as described in section 1.3.2. The organizations responsible for design, development, and operation of system elements described in this document must therefore prepare subordinate project-level documents that are consistent with the CRD. Changes to requirements will be managed in accordance with established change and configuration control procedures. The CRD establishes requirements for the design, development, and operation of the CRWMS. It specifically addresses the top-level governing laws and regulations (e.g., ''Nuclear Waste Policy Act'' (NWPA), 10 Code of Federal Regulations (CFR) Part 63, 10 CFR Part 71, etc.) along with specific policy, performance requirements, interface requirements, and system architecture. The CRD shall be used as a vehicle to incorporate specific changes in technical scope or performance requirements that may have significant program implications. Such may include changes to the program mission, changes to operational capability, and high visibility stakeholder issues. The CRD uses a systems approach to: (1) identify key functions that the CRWMS must perform, (2) allocate top-level requirements derived from statutory, regulatory, and programmatic sources, and (3) define the basic elements of the system architecture and operational concept. Project-level documents address CRD requirements by further

  10. Advanced extravehicular activity systems requirements definition study

    NASA Technical Reports Server (NTRS)

    1988-01-01

    A study to define the requirements for advanced extravehicular activities (AEVA) was conducted. The purpose of the study was to develop an understanding of the EVA technology requirements and to map a pathway from existing or developing technologies to an AEVA system capable of supporting long-duration missions on the lunar surface. The parameters of an AEVA system which must sustain the crewmembers and permit productive work for long periods in the lunar environment were examined. A design reference mission (DRM) was formulated and used as a tool to develop and analyze the EVA systems technology aspects. Many operational and infrastructure design issues which have a significant influence on the EVA system are identified.

  11. Advanced EVA system design requirements study

    NASA Technical Reports Server (NTRS)

    Woods, T. G.

    1988-01-01

    The results are presented of a study to identify specific criteria regarding space station extravehicular activity system (EVAS) hardware requirements. Key EVA design issues include maintainability, technology readiness, LSS volume vs. EVA time available, suit pressure/cabin pressure relationship and productivity effects, crew autonomy, integration of EVA as a program resource, and standardization of task interfaces. A variety of DOD EVA systems issues were taken into consideration. Recommendations include: (1) crew limitations, not hardware limitations; (2) capability to perform all of 15 generic missions; (3) 90 days on-orbit maintainability with 50 percent duty cycle as minimum; and (4) use by payload sponsors of JSC document 10615A plus a Generic Tool Kit and Specialized Tool Kit description. EVA baseline design requirements and criteria, including requirements of various subsystems, are outlined. Space station/EVA system interface requirements and EVA accommodations are discussed in the areas of atmosphere composition and pressure, communications, data management, logistics, safe haven, SS exterior and interior requirements, and SS airlock.

  12. Methodology for assessing systems materials requirements

    SciTech Connect

    Culver, D.H.; Teeter, R.R.; Jamieson, W.M.

    1980-01-01

    A potential stumbling block to new system planning and design is imprecise, confusing, or contradictory data regarding materials - their availability and costs. A methodology is now available that removes this barrier by minimizing uncertainties regarding materials availability. Using this methodology, a planner can assess materials requirements more quickly, at lower cost, and with much greater confidence in the results. Developed specifically for energy systems, its potential application is much broader. This methodology and examples of its use are discussed.

  13. Health requirements for advanced coal extraction systems

    NASA Technical Reports Server (NTRS)

    Zimmerman, W. F.

    1980-01-01

    Health requirements were developed as long range goals for future advanced coal extraction systems which would be introduced into the market in the year 2000. The goal of the requirements is that underground coal miners work in an environment that is as close as possible to the working conditions of the general population, that they do not exceed mortality and morbidity rates resulting from lung diseases that are comparable to those of the general population, and that their working conditions comply as closely as possible to those of other industries as specified by OSHA regulations. A brief technique for evaluating whether proposed advanced systems meet these safety requirements is presented, as well as a discussion of the costs of respiratory disability compensation.

  14. Human Systems Integration: Requirements and Functional Decomposition

    NASA Technical Reports Server (NTRS)

    Berson, Barry; Gershzohn, Gary; Boltz, Laura; Wolf, Russ; Schultz, Mike

    2005-01-01

    This deliverable was intended as an input to the Access 5 Policy and Simulation Integrated Product Teams. This document contains high-level pilot functionality for operations in the National Airspace System above FL430. Based on the derived pilot functions the associated pilot information and control requirements are given.

  15. Kinematic analysis of solar-neighborhood stars based on RAVE4 data

    NASA Astrophysics Data System (ADS)

    Bobylev, V. V.; Bajkova, A. T.

    2016-02-01

    We consider stars with radial velocities, proper motions, and distance estimates from the RAVE4 catalogue. Based on a sample of more than 145 000 stars at distances r < 0.5 kpc, we have found the following kinematic parameters: ( U, V, W)_ ⊙ = (9.12, 20.80, 7.66) ± (0.10, 0.10, 0.08) km s-1, Ω0 = 28.71 ± 0.63 km s-1 kpc-1, and Ω0 ' = -4.28 ± 0.11 km s-1 kpc-2. This gives the linear rotation velocity V 0 = 230 ± 12 km s-1 (for the adopted R 0 = 8.0 ± 0.4 kpc) and the Oort constants A = 17.12 ± 0.45 km s-1 kpc-1 and B = -11.60 ± 0.77 km s-1 kpc-1. The 2D velocity distributions in the UV, UW, and VW planes have been constructed using a local sample, r < 0.25 kpc, consisting of ~47 000 stars. A difference of the UV velocity distribution from the previously known ones constructed from a smaller amount of data has been revealed. It lies in the fact that our distribution has an extremely enhanced branch near the Wolf 630 peak. A previously unknown peak at ( U, V) = (-96, -10) km s-1 and a separate new feature in the Wolf 630 stream, with the coordinates of its center being ( U, V) = (30, -40) km s-1, have been detected.

  16. User requirements for a patient scheduling system

    NASA Technical Reports Server (NTRS)

    Zimmerman, W.

    1979-01-01

    A rehabilitation institute's needs and wants from a scheduling system were established by (1) studying the existing scheduling system and the variables that affect patient scheduling, (2) conducting a human-factors study to establish the human interfaces that affect patients' meeting prescribed therapy schedules, and (3) developing and administering a questionnaire to the staff which pertains to the various interface problems in order to identify staff requirements to minimize scheduling problems and other factors that may limit the effectiveness of any new scheduling system.

  17. Requirements for a transformerless power conditioning system

    NASA Astrophysics Data System (ADS)

    Klein, J.; Koerner, T.; Rippel, W.; Kalbach, J.

    1984-03-01

    Requirements for development of a Transformerless Power Conditioning Subsystem (TPCS) that will meet utility, manufacturer, and customer needs are detailed. Issues analyzed include current utility guidelines, safety and grounding issues that appear as local codes, various kinds of TPCS connections that can be developed, dc injection, and a brief survey of TPCS circuit topologies that will meet requirements. The major result is that a finite time exists for control operation before dc injection into the distribution transformer causes customer outage (on the order of seconds). This time permits the control system to sense a dc injection condition and remove the TPCS from the utility system. Requirements for such a control system are specified. A three wire connection will ensure balanced operation for customer loads and two wire connections caused average value dc to be injected into single phase loads. This type of connection also allows for the lowest array voltage. The conclusion is that requirements for a TPCS can be determined and that there are not showstopping issues preventing implementation. The actual design and topology of the TPCS was left for further study.

  18. Requirements for a transformerless power conditioning system

    NASA Technical Reports Server (NTRS)

    Klein, J.; Koerner, T.; Rippel, W.; Kalbach, J.

    1984-01-01

    Requirements for development of a Transformerless Power Conditioning Subsystem (TPCS) that will meet utility, manufacturer, and customer needs are detailed. Issues analyzed include current utility guidelines, safety and grounding issues that appear as local codes, various kinds of TPCS connections that can be developed, dc injection, and a brief survey of TPCS circuit topologies that will meet requirements. The major result is that a finite time exists for control operation before dc injection into the distribution transformer causes customer outage (on the order of seconds). This time permits the control system to sense a dc injection condition and remove the TPCS from the utility system. Requirements for such a control system are specified. A three wire connection will ensure balanced operation for customer loads and two wire connections caused average value dc to be injected into single phase loads. This type of connection also allows for the lowest array voltage. The conclusion is that requirements for a TPCS can be determined and that there are not showstopping issues preventing implementation. The actual design and topology of the TPCS was left for further study.

  19. HSCT high lift system aerodynamic requirements

    NASA Technical Reports Server (NTRS)

    Paulson, John A.

    1992-01-01

    The viewgraphs and discussion of high lift system aerodynamic requirements are provided. Low speed aerodynamics has been identified as critical to the successful development of a High Speed Civil Transport (HSCT). The airplane must takeoff and land at a sufficient number of existing or projected airports to be economically viable. At the same time, community noise must be acceptable. Improvements in cruise drag, engine fuel consumption, and structural weight tend to decrease the wing size and thrust required of engines. Decreasing wing size increases the requirements for effective and efficient low speed characteristics. Current design concepts have already been compromised away from better cruise wings for low speed performance. Flap systems have been added to achieve better lift-to-drag ratios for climb and approach and for lower pitch attitudes for liftoff and touchdown. Research to achieve improvements in low speed aerodynamics needs to be focused on areas most likely to have the largest effect on the wing and engine sizing process. It would be desirable to provide enough lift to avoid sizing the airplane for field performance and to still meet the noise requirements. The airworthiness standards developed in 1971 will be the basis for performance requirements for an airplane that will not be critical to the airplane wing and engine size. The lift and drag levels that were required to meet the performance requirements of tentative airworthiness standards established in 1971 and that were important to community noise are identified. Research to improve the low speed aerodynamic characteristics of the HSCT needs to be focused in the areas of performance deficiency and where noise can be reduced. Otherwise, the wing planform, engine cycle, or other parameters for a superior cruising airplane would have to be changed.

  20. Future Orbital Power Systems Technology Requirements

    NASA Technical Reports Server (NTRS)

    1978-01-01

    NASA is actively involved in program planning for missions requiring several orders of magnitude, more energy than in the past. Therefore, a two-day symposium was held to review the technology requirements for future orbital power systems. The purpose of the meeting was to give leaders from government and industry a broad view of current government supported technology efforts and future program plans in space power. It provided a forum for discussion, through workshops, to comment on current and planned programs and to identify opportunities for technology investment. Several papers are presented to review the technology status and the planned programs.

  1. Automatic Visualization of Software Requirements: Reactive Systems

    SciTech Connect

    Castello, R.; Mili, R.; Tollis, I.G.; Winter, V.

    1999-05-12

    In this paper we present an approach that facilitates the validation of high consequence system requirements. This approach consists of automatically generating a graphical representation from an informal document. Our choice of a graphical notation is statecharts. We proceed in two steps: we first extract a hierarchical decomposition tree from a textual description, then we draw a graph that models the statechart in a hierarchical fashion. The resulting drawing is an effective requirements assessment tool that allows the end user to easily pinpoint inconsistencies and incompleteness.

  2. Satellite systems requirements for land mobile communications

    NASA Technical Reports Server (NTRS)

    Horstein, M.

    1983-01-01

    The system design objective is to provide a satellite link through a gateway station, connecting mobile users in areas not served by a terrestrial cellular system to the switched telephone network (STN). The proposed frequency allocation comprises a pair of 10-MHz bands in the 806-890 MHz range specified by the 1979 World Administrative Radio Conference (WARC) for land-mobile satellite service (LMSS). The satellite design is constrained by projected STS capability with an upper stage of the wide-body Centaur or Integral Propulsion System (IPS) type. For the latter (a TRW design), the payload is limited to approximately 10,400 lb. The design is to be based on 1990's technology, with initial operating capability scheduled for 1995. The satellite should be designed for a 7-year life. Mobile-unit compatibility with cellular system specifications is desirable, if consistent with other system requirements.

  3. A HIGH-RESOLUTION, MULTI-EPOCH SPECTRAL ATLAS OF PECULIAR STARS INCLUDING RAVE, GAIA , AND HERMES WAVELENGTH RANGES

    SciTech Connect

    Tomasella, Lina; Munari, Ulisse; Zwitter, Tomaz

    2010-12-15

    We present an Echelle+CCD, high signal-to-noise ratio, high-resolution (R = 20,000) spectroscopic atlas of 108 well-known objects representative of the most common types of peculiar and variable stars. The wavelength interval extends from 4600 to 9400 A and includes the RAVE, Gaia, and HERMES wavelength ranges. Multi-epoch spectra are provided for the majority of the observed stars. A total of 425 spectra of peculiar stars, which were collected during 56 observing nights between 1998 November and 2002 August, are presented. The spectra are given in FITS format and heliocentric wavelengths, with accurate subtraction of both the sky background and the scattered light. Auxiliary material useful for custom applications (telluric dividers, spectrophotometric stars, flat-field tracings) is also provided. The atlas aims to provide a homogeneous database of the spectral appearance of stellar peculiarities, a tool useful both for classification purposes and inter-comparison studies. It could also serve in the planning and development of automated classification algorithms designed for RAVE, Gaia, HERMES, and other large-scale spectral surveys. The spectrum of XX Oph is discussed in some detail as an example of the content of the present atlas.

  4. Auxiliary propulsion requirements for large space systems

    NASA Technical Reports Server (NTRS)

    Maloy, J. E.; Smith, W. W.; Machles, G. W.

    1983-01-01

    An insight into auxiliary propulsion systems (APS) requirements for large space systems (LSS) launchable by a single shuttle is presented. In an effort to scope the APS requirements for LSS, a set of generic LSSs were defined. For each generic LSS class a specific structural configuration, representative of that most likely to serve the needs of the 1980's and 1990's was defined. The environmental disturbance forces and torques which would be acting on each specific structural configuration in LEO and GEO orbits were then determined. Auxiliary propulsion requirements were determined as a function of: generic class specific configuration, size and openness of structure, orbit, angle of orientation, correction frequency, duty cycle, number and location of thrusters and direction of thrusters and APS/LSS interactions. The results of this analysis were used to define the APS characteristics of: (1) number and distribution of thrusters, (2) thruster modulation, (3) thrust level, (4) mission energy requirements, (5) total APS mass component breakdown, and (6) state of the art adequacy/deficiency. Previously announced in STAR as N83-26922

  5. Auxiliary propulsion requirements for large space systems

    NASA Technical Reports Server (NTRS)

    Maloy, J. E.; Smith, W. W.; Machles, G. W.

    1983-01-01

    An insight into auxiliary propulsion systems (APS) requirements for large space systems (LSS) launchable by a single shuttle is presented. In an effort to scope the APS requirements for LSS, a set of generic LSSs were defined. For each generic LSS class a specific structural configuration, representative of that most likely to serve the needs of the 1980's and 1990's was defined. The environmental disturbance forces and torques which would be acting on each specific structural configuration in LEO and GEO orbits were then determined. Auxiliary propulsion requirements were determined as a function of: generic class specific configuration, size and openness of structure, orbit, angle of orientation, correction frequency, duty cycle, number and location of thrusters and direction of thrusters and APS/LSS interactions. The results of this analysis were used to define the APS characteristics of: (1) number and distribution of thrusters, (2) thruster modulation, (3) thrust level, (4) mission energy requirements, (5) total APS mass component breakdown, and (6) state of the art adequacy/deficiency.

  6. Cathodic protection requirements for deepwater systems

    SciTech Connect

    Menendez, C.M.; Hanson, H.R.; Kane, R.D.; Farquhar, G.B.

    1999-07-01

    Field and laboratory experience related to requirements for cathodic protection (CP) in deep water are reviewed with emphasis on identification of the major variables that need to be specified for successful deepwater CP designs for offshore structures. The subject is addressed based on the historical development of cathodic protection design methodologies for offshore structures focusing on sacrificial anode systems and trends that have resulted in specific changes in design requirements. Three main subjects are discussed: (1) application of existing industry standards such as NACE RP0176; (2) environmental factors--dissolved oxygen, temperature, salinity, pH, water velocity and fouling; and (3) calcareous deposits--difference between shallow and deep waters. Current practice of design criteria and systems for deepwater applications is assessed, including initial polarization, use of coatings and anode materials. The results from laboratory tests are compared with available documented service experiences and field tests results.

  7. Electric airplane environmental control systems energy requirements

    SciTech Connect

    Buss, L.B.

    1984-05-01

    The electric airplane environmental control system (ECS) design drivers is discussed for an electric airplane from two aspects. The first aspect considered is the type of aircraft. The three examples selected are the 150-passenger commercial airline transport, the military on-station electronic-surveillance patrol aircraft, and the air-defense interceptor fighter. These vehicle examples illustrate the effect of both mission and mission profile on the design requirements of the ECS and the differences that the requirements make on the resulting advantages and disadvantages of electrification. For the commercial transport, the selection of the air source for ventilation will be featured. For the patrol aircraft, the cooling unit will be evaluated. For the fighter, emphasis will be placed on the need for systems integration. The second and more important consideration is the definition of the environmental control system requirements for both energy supply and heat sink thermal management integration from the power plant (engine) that make an electric ECS viable for each type of vehicle.

  8. Evaporative condensing minimizes system power requirements

    SciTech Connect

    Knebel, D.E.

    1997-04-01

    Evaporative condensing is a heat-rejection technology widely applied with industrial refrigeration. When employed with HVAC systems it can reduce electrical energy and demand consumption of an HVAC system by 20 to 40%, depending on location, compared to air-cooled condensing. Evaporative condensing allows direct-expansion (DX) systems to achieve energy and demand consumption comparable to the most efficient chilled water central plant systems. As the industry focuses its attention on solving the problems of energy conservation, demand reduction, and global warming, high-efficiency air conditioning systems utilizing evaporative condensing provide a reliable and cost-effective solution today. This article addresses the advantages of evaporative condensing over air-cooled and water-cooled condensing in DX packaged systems as well as chiller/cooling tower systems. A review of condensing methods and standard system operating characteristics will be used as examples to illustrate the thermodynamic benefits of evaporative condensing. Requirements for successful operation of evaporative condensers will be discussed.

  9. Intelligent redundant actuation system requirements and preliminary system design

    NASA Technical Reports Server (NTRS)

    Defeo, P.; Geiger, L. J.; Harris, J.

    1985-01-01

    Several redundant actuation system configurations were designed and demonstrated to satisfy the stringent operational requirements of advanced flight control systems. However, this has been accomplished largely through brute force hardware redundancy, resulting in significantly increased computational requirements on the flight control computers which perform the failure analysis and reconfiguration management. Modern technology now provides powerful, low-cost microprocessors which are effective in performing failure isolation and configuration management at the local actuator level. One such concept, called an Intelligent Redundant Actuation System (IRAS), significantly reduces the flight control computer requirements and performs the local tasks more comprehensively than previously feasible. The requirements and preliminary design of an experimental laboratory system capable of demonstrating the concept and sufficiently flexible to explore a variety of configurations are discussed.

  10. Advanced EVA system design requirements study: EVAS/space station system interface requirements

    NASA Technical Reports Server (NTRS)

    Woods, T. G.

    1985-01-01

    The definition of the Extravehicular Activity (EVA) systems interface requirements and accomodations for effective integration of a production EVA capability into the space station are contained. A description of the EVA systems for which the space station must provide the various interfaces and accomodations are provided. The discussion and analyses of the various space station areas in which the EVA interfaces are required and/or from which implications for EVA system design requirements are derived, are included. The rationale is provided for all EVAS mechanical, fluid, electrical, communications, and data system interfaces as well as exterior and interior requirements necessary to facilitate EVA operations. Results of the studies supporting these discussions are presented in the appendix.

  11. Vehicle systems and payload requirements evaluation. [computer programs for identifying launch vehicle system requirements

    NASA Technical Reports Server (NTRS)

    Rea, F. G.; Pittenger, J. L.; Conlon, R. J.; Allen, J. D.

    1975-01-01

    Techniques developed for identifying launch vehicle system requirements for NASA automated space missions are discussed. Emphasis is placed on development of computer programs and investigation of astrionics for OSS missions and Scout. The Earth Orbit Mission Program - 1 which performs linear error analysis of launch vehicle dispersions for both vehicle and navigation system factors is described along with the Interactive Graphic Orbit Selection program which allows the user to select orbits which satisfy mission requirements and to evaluate the necessary injection accuracy.

  12. Foreign Currency Requirements Automated Data System,

    DTIC Science & Technology

    1984-12-07

    RIDef. 4O02 LSNA 1080 HAz 1705 BPP IV. Code Fiscal Year Submit I/ V. Code Fiscal Year Submit 4/ .82 -4982 83 1983 84 1984 85 1985 86 1986 87 1987 VI...discussion of the equipment configuration requires that the following equipment categories be addressed: 0 Processors 0 Storage media * Output devices • Input...memory (core). They operate under the Multiple Virtual Storage (MVS) operating system. 5.1.2 Storage Media The part of the computer that is able to

  13. Future space transportation system architecture avionics requirements

    NASA Technical Reports Server (NTRS)

    Stone, Howard; Engelund, Walt

    1993-01-01

    NASA began a multi-center study in January 1993 to examine options for providing the most cost effective space transportation system in the future. The key advanced avionics requirements for these vehicle concepts are envisioned to provide significantly improved operational efficiency and effectiveness. It is very desirable to have adaptive guidance, navigation, and control approaches that will allow launch and return in almost any weather condition. The vehicles must be able to accommodate atmospheric density variations and winds without software changes. The flight operations must become much more autonomous in all flight regimes like an aircraft, and preflight checkout should make use of the onboard systems. When the vehicle returns to the launch site, subsystem health must be known and maintenance tasks scheduled accordingly. Ground testing of most subsystems must be eliminated. Also, the health monitoring system must be designed to enhance the ability to abort the mission significantly and save the crew and the vehicle. The displays and controls must be much less complex than current systems and must significantly reduce pilot work load. It is important to have low power, light weight displays and controls. Rendezvous and docking and all flight phases must have autopilot capability to reduce pilot work load for routine operations and in abort situations. The vehicles must have the demonstrated ability to return to the launch site. Abort from all mission phases can put additional demands on the communications system.

  14. Developing IVHM Requirements for Aerospace Systems

    NASA Technical Reports Server (NTRS)

    Rajamani, Ravi; Saxena, Abhinav; Kramer, Frank; Augustin, Mike; Schroeder, John B.; Goebel, Kai; Shao, Ginger; Roychoudhury, Indranil; Lin, Wei

    2013-01-01

    The term Integrated Vehicle Health Management (IVHM) describes a set of capabilities that enable sustainable and safe operation of components and subsystems within aerospace platforms. However, very little guidance exists for the systems engineering aspects of design with IVHM in mind. It is probably because of this that designers have to use knowledge picked up exclusively by experience rather than by established process. This motivated a group of leading IVHM practitioners within the aerospace industry under the aegis of SAE's HM-1 technical committee to author a document that hopes to give working engineers and program managers clear guidance on all the elements of IVHM that they need to consider before designing a system. This proposed recommended practice (ARP6883 [1]) will describe all the steps of requirements generation and management as it applies to IVHM systems, and demonstrate these with a "real-world" example related to designing a landing gear system. The team hopes that this paper and presentation will help start a dialog with the larger aerospace community and that the feedback can be used to improve the ARP and subsequently the practice of IVHM from a systems engineering point-of-view.

  15. 46 CFR 63.20-1 - Specific control system requirements.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 2 2014-10-01 2014-10-01 false Specific control system requirements. 63.20-1 Section 63... AUXILIARY BOILERS Additional Control System Requirements § 63.20-1 Specific control system requirements. In... following requirements apply for specific control systems: (a) Primary safety control system....

  16. 46 CFR 63.20-1 - Specific control system requirements.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 2 2011-10-01 2011-10-01 false Specific control system requirements. 63.20-1 Section 63... AUXILIARY BOILERS Additional Control System Requirements § 63.20-1 Specific control system requirements. In... following requirements apply for specific control systems: (a) Primary safety control system....

  17. 46 CFR 63.20-1 - Specific control system requirements.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 2 2010-10-01 2010-10-01 false Specific control system requirements. 63.20-1 Section 63... AUXILIARY BOILERS Additional Control System Requirements § 63.20-1 Specific control system requirements. In... following requirements apply for specific control systems: (a) Primary safety control system....

  18. Tsunami Detection Systems for International Requirements

    NASA Astrophysics Data System (ADS)

    Lawson, R. A.

    2007-12-01

    Results are presented regarding the first commercially available, fully operational, tsunami detection system to have passed stringent U.S. government testing requirements and to have successfully demonstrated its ability to detect an actual tsunami at sea. Spurred by the devastation of the December 26, 2004, Indian Ocean tsunami that killed more than 230,000 people, the private sector actively supported the Intergovernmental Oceanographic Commission's (IOC"s) efforts to develop a tsunami warning system and mitigation plan for the Indian Ocean region. As each country in the region developed its requirements, SAIC recognized that many of these underdeveloped countries would need significant technical assistance to fully execute their plans. With the original focus on data fusion, consequence assessment tools, and warning center architecture, it was quickly realized that the cornerstone of any tsunami warning system would be reliable tsunami detection buoys that could meet very stringent operational standards. Our goal was to leverage extensive experience in underwater surveillance and oceanographic sensing to produce an enhanced and reliable deep water sensor that could meet emerging international requirements. Like the NOAA Deep-ocean Assessment and Recording of Tsunamis (DART TM ) buoy, the SAIC Tsunami Buoy (STB) system consists of three subsystems: a surfaccommunications buoy subsystem, a bottom pressure recorder subsystem, and a buoy mooring subsystem. With the operational success that DART has demonstrated, SAIC decided to build and test to the same high standards. The tsunami detection buoy system measures small changes in the depth of the deep ocean caused by tsunami waves as they propagate past the sensor. This is accomplished by using an extremely sensitive bottom pressure sensor/recorder to measure very small changes in pressure as the waves move past the buoy system. The bottom pressure recorder component includes a processor with algorithms that

  19. Design requirements for SRB production control system. Volume 2: System requirements and conceptual description

    NASA Technical Reports Server (NTRS)

    1981-01-01

    In the development of the business system for the SRB automated production control system, special attention had to be paid to the unique environment posed by the space shuttle. The issues posed by this environment, and the means by which they were addressed, are reviewed. The change in management philosphy which will be required as NASA switches from one-of-a-kind launches to multiple launches is discussed. The implications of the assembly process on the business system are described. These issues include multiple missions, multiple locations and facilities, maintenance and refurbishment, multiple sources, and multiple contractors. The implications of these aspects on the automated production control system are reviewed including an assessment of the six major subsystems, as well as four other subsystem. Some general system requirements which flow through the entire business system are described.

  20. Profiles of urine samples taken from Ecstasy users at Rave parties: analysis by immunoassays, HPLC, and GC-MS.

    PubMed

    Zhao, H; Brenneisen, R; Scholer, A; McNally, A J; ElSohly, M A; Murphy, T P; Salamone, S J

    2001-01-01

    The abuse of the designer amphetamines such as 3,4-methylenedioxymethamphetamine (MDMA, Ecstasy) is increasing throughout the world. They have become popular drugs, especially at all-night techno dance parties (Raves), and their detection is becoming an important issue. Presently, there are no MDMA- or MDA-specific immunoassays on the market, and detection of the designer amphetamines is dependent upon the use of commercially available amphetamine assays. The success of this approach has been difficult to assess because of the general unavailability of significant numbers of samples from known drug users. The objectives of the present study are to characterize the drug content of urine samples from admitted Ecstasy users by chromatographic methods and to assess the ability of the available amphetamine/methamphetamine immunoassays to detect methylenedioxyamphetamines. We found that, when analyzed by high-performance liquid chromatography with diode-array detection (HPLC-DAD), 64% of 70 urine samples (by gas chromatography-mass spectrometry [GC-MS]: 88% of 64 urine samples) obtained from Rave attendees contained MDMA and/or 3,4-methylenedioxyamphetamine (MDA) alone or in combination with amphetamine, methamphetamine, or other designer amphetamines such as 3,4-methylenedioxyethylamphetamine (MDEA). This suggests that the majority of the Ravers are multidrug users. At the manufacturer's suggested cutoffs, the Abbott TDx Amphetamine/Methamphetamine II and the new Roche HS Amphetamine/MDMA assays demonstrated greater detection sensitivity for MDMA than the other amphetamine immunoassays tested (Abuscreen OnLine Hitachi AMPS, Abuscreen OnLine Integra AMPS, Abuscreen OnLine Integra AMPSX, CEDIA AMPS, and EMIT II AMPS). There is 100% agreement between each of the two immunoassays with the reference chromatographic methods, HPLC-DAD and GC-MS, for the detection of methylenedioxyamphetamines.

  1. Facility requirements for hypersonic propulsion system testing

    NASA Astrophysics Data System (ADS)

    Dunn, M. G.; Lordi, J. A.; Wittliff, C. E.; Holden, M. S.

    Facility requirements and capabilities for hypersonic propulsion system testing are reviewed with emphasis on short-duration test facilities. Past and current hypersonic facility studies are reviewed, and some of the many problems currently associated with wing-body hypersonic aircraft and several currently operational ground-based facilities or facilities in the development stage are described. Limitations on the short-duration shock tunnel are examined, including problem areas where this device can make significant contributions to the type of unified computational, ground-test, and flight-experiment program that will be necessary to resolve complex issues associated with the development of either a SSTO vehicle or an air-breathing/rocket-assist-to-orbit vehicle.

  2. Scientific requirements for space science data systems

    NASA Technical Reports Server (NTRS)

    Walker, Raymond J.

    1991-01-01

    In the 1990's space plasma physics studies will increasingly involve correlative analysis of observations from multiple instruments and multiple spacecraft. The solar terrestrial physics missions in the 1990's will be designed around simultaneous observations from spacecraft monitoring the solar wind, the polar magnetosphere and the near and distant magnetotail. Within these regions, clusters of spacecraft flying in formation will increasingly involve comparative magnetospheric studies. No single lab will have the expertise to process and analyze all of the different types of data so the data repositories will be distributed. Catalog and browse systems will be required to help select events for study. Data compression techniques may be useful in designing the data bases used for selecting events for study. Data compression onboard the spacecraft will be necessary, since instrument data rates will be much larger than available telemetry rates. However, considerable care will be necessary to avoid losing valuable data when applying data compression algorithms.

  3. System requirements specification for waste information and control system

    SciTech Connect

    Harris, R.R.

    1994-09-01

    This document defines the requirements for the Waste Information and Control System (WICS). The document defines the functions, constraints, and objectives that pertain to WICS. This shall serve as the baseline document to ensure the needs of the Hazardous Material Control group (HMC) at 222-S Laboratory are met with regard to assurance of accuracy and quality of data taken with WICS.

  4. Materials Requirements for Advanced Propulsion Systems

    NASA Technical Reports Server (NTRS)

    Whitaker, Ann F.; Cook, Mary Beth; Clinton, R. G., Jr.

    2005-01-01

    NASA's mission to "reach the Moon and Mars" will be obtained only if research begins now to develop materials with expanded capabilities to reduce mass, cost and risk to the program. Current materials cannot function satisfactorily in the deep space environments and do not meet the requirements of long term space propulsion concepts for manned missions. Directed research is needed to better understand materials behavior for optimizing their processing. This research, generating a deeper understanding of material behavior, can lead to enhanced implementation of materials for future exploration vehicles. materials providing new approaches for manufacture and new options for In response to this need for more robust materials, NASA's Exploration Systems Mission Directorate (ESMD) has established a strategic research initiative dedicated to materials development supporting NASA's space propulsion needs. The Advanced Materials for Exploration (AME) element directs basic and applied research to understand material behavior and develop improved materials allowing propulsion systems to operate beyond their current limitations. This paper will discuss the approach used to direct the path of strategic research for advanced materials to ensure that the research is indeed supportive of NASA's future missions to the moon, Mars, and beyond.

  5. 21 CFR 821.25 - Device tracking system and content requirements: manufacturer requirements.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES MEDICAL DEVICE TRACKING REQUIREMENTS Tracking Requirements § 821.25 Device tracking system and content requirements: manufacturer requirements. (a) A... 21 Food and Drugs 8 2014-04-01 2014-04-01 false Device tracking system and content...

  6. 21 CFR 821.25 - Device tracking system and content requirements: manufacturer requirements.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Device tracking system and content requirements... Requirements § 821.25 Device tracking system and content requirements: manufacturer requirements. (a) A... distributes that enables a manufacturer to provide FDA with the following information in writing for...

  7. Engineered Barrier System performance requirements systems study report. Revision 02

    SciTech Connect

    Balady, M.A.

    1997-01-14

    This study evaluates the current design concept for the Engineered Barrier System (EBS), in concert with the current understanding of the geologic setting to assess whether enhancements to the required performance of the EBS are necessary. The performance assessment calculations are performed by coupling the EBS with the geologic setting based on the models (some of which were updated for this study) and assumptions used for the 1995 Total System Performance Assessment (TSPA). The need for enhancements is determined by comparing the performance assessment results against the EBS related performance requirements. Subsystem quantitative performance requirements related to the EBS include the requirement to allow no more than 1% of the waste packages (WPs) to fail before 1,000 years after permanent closure of the repository, as well as a requirement to control the release rate of radionuclides from the EBS. The EBS performance enhancements considered included additional engineered components as well as evaluating additional performance available from existing design features but for which no performance credit is currently being taken.

  8. Capturing security requirements for software systems.

    PubMed

    El-Hadary, Hassan; El-Kassas, Sherif

    2014-07-01

    Security is often an afterthought during software development. Realizing security early, especially in the requirement phase, is important so that security problems can be tackled early enough before going further in the process and avoid rework. A more effective approach for security requirement engineering is needed to provide a more systematic way for eliciting adequate security requirements. This paper proposes a methodology for security requirement elicitation based on problem frames. The methodology aims at early integration of security with software development. The main goal of the methodology is to assist developers elicit adequate security requirements in a more systematic way during the requirement engineering process. A security catalog, based on the problem frames, is constructed in order to help identifying security requirements with the aid of previous security knowledge. Abuse frames are used to model threats while security problem frames are used to model security requirements. We have made use of evaluation criteria to evaluate the resulting security requirements concentrating on conflicts identification among requirements. We have shown that more complete security requirements can be elicited by such methodology in addition to the assistance offered to developers to elicit security requirements in a more systematic way.

  9. Information System Requirements Determination: Factors Impeding Stakeholders from Reaching Common Understandings and Agreements on Requirements

    ERIC Educational Resources Information Center

    Gissel, Richard L.

    2010-01-01

    Information system implementations require developers to first know what they must create and then determine how best to create it. The requirements determination phase of the system development life cycle typically determines what functions a system must perform and how well it must accomplish required functions. Implementation success depends on…

  10. Automated Orbit Determination System (AODS) requirements definition and analysis

    NASA Technical Reports Server (NTRS)

    Waligora, S. R.; Goorevich, C. E.; Teles, J.; Pajerski, R. S.

    1980-01-01

    The requirements definition for the prototype version of the automated orbit determination system (AODS) is presented including the AODS requirements at all levels, the functional model as determined through the structured analysis performed during requirements definition, and the results of the requirements analysis. Also specified are the implementation strategy for AODS and the AODS-required external support software system (ADEPT), input and output message formats, and procedures for modifying the requirements.

  11. Surveillance Analysis Computer System (SACS) software requirements specification (SRS)

    SciTech Connect

    Glasscock, J.A.; Flanagan, M.J.

    1995-09-01

    This document is the primary document establishing requirements for the Surveillance Analysis Computer System (SACS) Database, an Impact Level 3Q system. The purpose is to provide the customer and the performing organization with the requirements for the SACS Project.

  12. 40 CFR 141.712 - Unfiltered system Cryptosporidium treatment requirements.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... inactivation. (c) Inactivation treatment technology requirements. Unfiltered systems must use chlorine dioxide... section. (1) Systems that use chlorine dioxide or ozone and fail to achieve the...

  13. 40 CFR 141.712 - Unfiltered system Cryptosporidium treatment requirements.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... inactivation. (c) Inactivation treatment technology requirements. Unfiltered systems must use chlorine dioxide... section. (1) Systems that use chlorine dioxide or ozone and fail to achieve the...

  14. 40 CFR 141.712 - Unfiltered system Cryptosporidium treatment requirements.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... inactivation. (c) Inactivation treatment technology requirements. Unfiltered systems must use chlorine dioxide... section. (1) Systems that use chlorine dioxide or ozone and fail to achieve the...

  15. 40 CFR 141.712 - Unfiltered system Cryptosporidium treatment requirements.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... inactivation. (c) Inactivation treatment technology requirements. Unfiltered systems must use chlorine dioxide... section. (1) Systems that use chlorine dioxide or ozone and fail to achieve the...

  16. 40 CFR 141.712 - Unfiltered system Cryptosporidium treatment requirements.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... inactivation. (c) Inactivation treatment technology requirements. Unfiltered systems must use chlorine dioxide... section. (1) Systems that use chlorine dioxide or ozone and fail to achieve the...

  17. 23 CFR 973.204 - Management systems requirements.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... system; (2) A process to operate and maintain the management systems and their associated databases; (3... 23 Highways 1 2010-04-01 2010-04-01 false Management systems requirements. 973.204 Section 973.204... Indian Affairs Management Systems § 973.204 Management systems requirements. (a) The BIA, in...

  18. 23 CFR 973.204 - Management systems requirements.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... system; (2) A process to operate and maintain the management systems and their associated databases; (3... 23 Highways 1 2012-04-01 2012-04-01 false Management systems requirements. 973.204 Section 973.204... Indian Affairs Management Systems § 973.204 Management systems requirements. (a) The BIA, in...

  19. 23 CFR 973.204 - Management systems requirements.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... system; (2) A process to operate and maintain the management systems and their associated databases; (3... 23 Highways 1 2011-04-01 2011-04-01 false Management systems requirements. 973.204 Section 973.204... Indian Affairs Management Systems § 973.204 Management systems requirements. (a) The BIA, in...

  20. Advanced EVA system design requirements study, executive summary

    NASA Technical Reports Server (NTRS)

    1986-01-01

    Design requirements and criteria for the space station advanced Extravehicular Activity System (EVAS) including crew enclosures, portable life support systems, maneuvering propulsion systems, and related EVA support equipment were established. The EVA mission requirements, environments, and medical and physiological requirements, as well as operational, procedures and training issues were considered.

  1. 7 CFR 1767.12 - Accounting system requirements.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 12 2011-01-01 2011-01-01 false Accounting system requirements. 1767.12 Section 1767..., DEPARTMENT OF AGRICULTURE (CONTINUED) ACCOUNTING REQUIREMENTS FOR RUS ELECTRIC BORROWERS Uniform System of Accounts § 1767.12 Accounting system requirements. (a) Each Rural Development electric borrower...

  2. 7 CFR 1770.11 - Accounting system requirements.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 12 2014-01-01 2013-01-01 true Accounting system requirements. 1770.11 Section 1770..., DEPARTMENT OF AGRICULTURE (CONTINUED) ACCOUNTING REQUIREMENTS FOR RUS TELECOMMUNICATIONS BORROWERS Uniform System of Accounts § 1770.11 Accounting system requirements. (a) Each RUS borrower subject to...

  3. 7 CFR 1767.12 - Accounting system requirements.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 12 2014-01-01 2013-01-01 true Accounting system requirements. 1767.12 Section 1767..., DEPARTMENT OF AGRICULTURE (CONTINUED) ACCOUNTING REQUIREMENTS FOR RUS ELECTRIC BORROWERS Uniform System of Accounts § 1767.12 Accounting system requirements. (a) Each Rural Development electric borrower...

  4. 7 CFR 1770.11 - Accounting system requirements.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 12 2011-01-01 2011-01-01 false Accounting system requirements. 1770.11 Section 1770..., DEPARTMENT OF AGRICULTURE (CONTINUED) ACCOUNTING REQUIREMENTS FOR RUS TELECOMMUNICATIONS BORROWERS Uniform System of Accounts § 1770.11 Accounting system requirements. (a) Each RUS borrower subject to...

  5. 49 CFR 659.21 - System security plan: general requirements.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 7 2011-10-01 2011-10-01 false System security plan: general requirements. 659.21... State Oversight Agency § 659.21 System security plan: general requirements. (a) The oversight agency shall require the rail transit agency to implement a system security plan that, at a minimum,...

  6. 49 CFR 659.21 - System security plan: general requirements.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 7 2010-10-01 2010-10-01 false System security plan: general requirements. 659.21... State Oversight Agency § 659.21 System security plan: general requirements. (a) The oversight agency shall require the rail transit agency to implement a system security plan that, at a minimum,...

  7. HVDC control developments - addressing system requirements

    SciTech Connect

    Hauth, R.L.; Patel, H.S.; Piwko, R.J.

    1984-01-01

    This article describes typical high voltage direct current (HVDC) control systems and some of the new developments in the control area. HVDC control systems are showing their flexible characteristics as demonstrated, for example, by the new modulation, torsional damping, and alternating current voltage and reactive power controllers. Extensive studies are conducted to design and integrate such controllers into HVDC systems and to assure against any detrimental interactions within the total control system. 8 figures.

  8. Analytical tool requirements for power system restoration

    SciTech Connect

    Adibi, M.M. ); Borkoski, J.N. ); Kafka, R.J. )

    1994-08-01

    This paper is one of series presented by Power System Restoration Working Group (SRWG) on behalf of the System, Operation Subcommittee with the intent of focusing industry attention on power system restoration. In this paper a set of analytical tools is specified which together describe the static, transient and dynamic behavior of a power system during restoration. These tools are identified and described for restoration planning, training and operation. Their applications cover all stages of restoration including pre-disturbance condition, post-disturbance status, post-restoration target system, and minimization of unserved loads. The paper draws on the previous reports by the SRWG.

  9. System requirements specification for SMART structures mode

    NASA Technical Reports Server (NTRS)

    1992-01-01

    Specified here are the functional and informational requirements for software modules which address the geometric and data modeling needs of the aerospace structural engineer. The modules are to be included as part of the Solid Modeling Aerospace Research Tool (SMART) package developed for the Vehicle Analysis Branch (VAB) at the NASA Langley Research Center (LaRC). The purpose is to precisely state what the SMART Structures modules will do, without consideration of how it will be done. Each requirement is numbered for reference in development and testing.

  10. Exploration Planetary Surface Structural Systems: Design Requirements and Compliance

    NASA Technical Reports Server (NTRS)

    Dorsey, John T.

    2011-01-01

    The Lunar Surface Systems Project developed system concepts that would be necessary to establish and maintain a permanent human presence on the Lunar surface. A variety of specific system implementations were generated as a part of the scenarios, some level of system definition was completed, and masses estimated for each system. Because the architecture studies generally spawned a large number of system concepts and the studies were executed in a short amount of time, the resulting system definitions had very low design fidelity. This paper describes the development sequence required to field a particular structural system: 1) Define Requirements, 2) Develop the Design and 3) Demonstrate Compliance of the Design to all Requirements. This paper also outlines and describes in detail the information and data that are required to establish structural design requirements and outlines the information that would comprise a planetary surface system Structures Requirements document.

  11. 78 FR 36738 - Signal System Reporting Requirements

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-19

    ...., Monday through Friday, except Federal holidays. FOR FURTHER INFORMATION CONTACT: Sean Crain, Electronic Engineer, Signal and Train Control Division, Office of Railroad Safety, FRA, 1200 New Jersey Avenue SE... Report form into an electronic format. The electronic form required all of the same information as...

  12. 23 CFR 973.204 - Management systems requirements.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 23 Highways 1 2013-04-01 2013-04-01 false Management systems requirements. 973.204 Section 973.204... Indian Affairs Management Systems § 973.204 Management systems requirements. (a) The BIA, in consultation... management systems for federally and tribally owned IRRs. The BIA may tailor the nationwide...

  13. 23 CFR 973.204 - Management systems requirements.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 23 Highways 1 2014-04-01 2014-04-01 false Management systems requirements. 973.204 Section 973.204... Indian Affairs Management Systems § 973.204 Management systems requirements. (a) The BIA, in consultation... management systems for federally and tribally owned IRRs. The BIA may tailor the nationwide...

  14. Developing Systemic Theories Requires Formal Methods

    ERIC Educational Resources Information Center

    Gobet, Fernand

    2012-01-01

    Ziegler and Phillipson (Z&P) advance an interesting and ambitious proposal, whereby current analytical/mechanistic theories of gifted education are replaced by systemic theories. In this commentary, the author focuses on the pros and cons of using systemic theories. He argues that Z&P's proposal both goes too far and not far enough. The future of…

  15. Traceability of Software Safety Requirements in Legacy Safety Critical Systems

    NASA Technical Reports Server (NTRS)

    Hill, Janice L.

    2007-01-01

    How can traceability of software safety requirements be created for legacy safety critical systems? Requirements in safety standards are imposed most times during contract negotiations. On the other hand, there are instances where safety standards are levied on legacy safety critical systems, some of which may be considered for reuse for new applications. Safety standards often specify that software development documentation include process-oriented and technical safety requirements, and also require that system and software safety analyses are performed supporting technical safety requirements implementation. So what can be done if the requisite documents for establishing and maintaining safety requirements traceability are not available?

  16. Autonomy requirements for satellite power systems

    SciTech Connect

    Trumble, T.M.; Gjermundsen, E.; Wise, J.F.

    1984-08-01

    The focus of this paper, automating the power subsystems of satellites, represents one of the more complex and challenging tasks in achieving future autonomy goals. Recent studies have determined that our current satellites cannot survive for extended periods of time without the aid of ground support. Future survivable spacecraft will be required to perform their own support by utilizing a distributed processing architecture where smart subsystems interact with the centralized spacecraft computer.

  17. Implementation Procedure for STS Payloads, System Safety Requirements

    NASA Technical Reports Server (NTRS)

    1979-01-01

    Guidelines and instructions for the implementation of the SP&R system safety requirements applicable to STS payloads are provided. The initial contact meeting with the payload organization and the subsequent safety reviews necessary to comply with the system safety requirements of the SP&R document are described. Waiver instructions are included for the cases in which a safety requirement cannot be met.

  18. 49 CFR 228.313 - Electrical system requirements.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Electrical system requirements. 228.313 Section...; SLEEPING QUARTERS Safety and Health Requirements for Camp Cars Provided by Railroads as Sleeping Quarters § 228.313 Electrical system requirements. (a) All heating, cooking, ventilation, air conditioning,...

  19. 49 CFR 228.313 - Electrical system requirements.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Electrical system requirements. 228.313 Section...; SLEEPING QUARTERS Safety and Health Requirements for Camp Cars Provided by Railroads as Sleeping Quarters § 228.313 Electrical system requirements. (a) All heating, cooking, ventilation, air conditioning,...

  20. 49 CFR 228.313 - Electrical system requirements.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Electrical system requirements. 228.313 Section...; SLEEPING QUARTERS Safety and Health Requirements for Camp Cars Provided by Railroads as Sleeping Quarters § 228.313 Electrical system requirements. (a) All heating, cooking, ventilation, air conditioning,...

  1. Performance Requirements for the Double Shell Tank (DST) System

    SciTech Connect

    SMITH, D.F.

    2001-09-10

    This document identifies the upper-level Double-Shell Tank (DST) System functions and bounds the associated performance requirements. The functions and requirements are provided along with supporting bases. These functions and requirements, in turn, will be incorporated into specifications for the DST System.

  2. Automated Derivation of Complex System Constraints from User Requirements

    NASA Technical Reports Server (NTRS)

    Muery, Kim; Foshee, Mark; Marsh, Angela

    2006-01-01

    International Space Station (ISS) payload developers submit their payload science requirements for the development of on-board execution timelines. The ISS systems required to execute the payload science operations must be represented as constraints for the execution timeline. Payload developers use a software application, User Requirements Collection (URC), to submit their requirements by selecting a simplified representation of ISS system constraints. To fully represent the complex ISS systems, the constraints require a level of detail that is beyond the insight of the payload developer. To provide the complex representation of the ISS system constraints, HOSC operations personnel, specifically the Payload Activity Requirements Coordinators (PARC), manually translate the payload developers simplified constraints into detailed ISS system constraints used for scheduling the payload activities in the Consolidated Planning System (CPS). This paper describes the implementation for a software application, User Requirements Integration (URI), developed to automate the manual ISS constraint translation process.

  3. New Work Systems and Skill Requirements.

    ERIC Educational Resources Information Center

    Cappelli, Peter; Rogovsky, Nikolai

    1994-01-01

    The relationship between production systems, work organization, and skills has become a policy consideration in many industrialized countries seeking to improve competitiveness without reducing wage standards. Decision makers should weigh the costs of making these changes. (JOW)

  4. Facility Requirements for Integrated Learning Systems.

    ERIC Educational Resources Information Center

    Knirk, Frederick G.

    1992-01-01

    Discusses features in the physical environment that need to be considered for integrated learning systems (ILSs). Highlights include ergonomics; lighting, including contrast and colors; space, furniture, and equipment, including keyboard, monitor, software, and printer; ambient noise and acoustics; temperature, humidity, and air quality control;…

  5. 5 CFR 9701.405 - Performance management system requirements.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 5 Administrative Personnel 3 2013-01-01 2013-01-01 false Performance management system... management system requirements. (a) DHS will issue implementing directives that establish one or more performance management systems for DHS employees, subject to the requirements set forth in this subpart....

  6. 5 CFR 9701.405 - Performance management system requirements.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 5 Administrative Personnel 3 2014-01-01 2014-01-01 false Performance management system... management system requirements. (a) DHS will issue implementing directives that establish one or more performance management systems for DHS employees, subject to the requirements set forth in this subpart....

  7. 46 CFR 16.500 - Management Information System requirements.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 1 2010-10-01 2010-10-01 false Management Information System requirements. 16.500 Section 16.500 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MERCHANT MARINE OFFICERS AND SEAMEN CHEMICAL TESTING Management Information System § 16.500 Management Information System requirements....

  8. 46 CFR 16.500 - Management Information System requirements.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 1 2011-10-01 2011-10-01 false Management Information System requirements. 16.500 Section 16.500 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MERCHANT MARINE OFFICERS AND SEAMEN CHEMICAL TESTING Management Information System § 16.500 Management Information System requirements....

  9. 46 CFR 16.500 - Management Information System requirements.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 1 2014-10-01 2014-10-01 false Management Information System requirements. 16.500 Section 16.500 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MERCHANT MARINE OFFICERS AND SEAMEN CHEMICAL TESTING Management Information System § 16.500 Management Information System requirements....

  10. 46 CFR 16.500 - Management Information System requirements.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 1 2012-10-01 2012-10-01 false Management Information System requirements. 16.500 Section 16.500 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MERCHANT MARINE OFFICERS AND SEAMEN CHEMICAL TESTING Management Information System § 16.500 Management Information System requirements....

  11. 46 CFR 16.500 - Management Information System requirements.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 1 2013-10-01 2013-10-01 false Management Information System requirements. 16.500 Section 16.500 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MERCHANT MARINE OFFICERS AND SEAMEN CHEMICAL TESTING Management Information System § 16.500 Management Information System requirements....

  12. 40 CFR 280.41 - Requirements for petroleum UST systems.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 27 2014-07-01 2014-07-01 false Requirements for petroleum UST systems... UNDERGROUND STORAGE TANKS (UST) Release Detection § 280.41 Requirements for petroleum UST systems. Owners and operators of petroleum UST systems must provide release detection for tanks and piping as follows: (a)...

  13. 40 CFR 280.41 - Requirements for petroleum UST systems.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 28 2013-07-01 2013-07-01 false Requirements for petroleum UST systems... UNDERGROUND STORAGE TANKS (UST) Release Detection § 280.41 Requirements for petroleum UST systems. Owners and operators of petroleum UST systems must provide release detection for tanks and piping as follows: (a)...

  14. 40 CFR 280.41 - Requirements for petroleum UST systems.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 27 2011-07-01 2011-07-01 false Requirements for petroleum UST systems... UNDERGROUND STORAGE TANKS (UST) Release Detection § 280.41 Requirements for petroleum UST systems. Owners and operators of petroleum UST systems must provide release detection for tanks and piping as follows: (a)...

  15. 40 CFR 280.41 - Requirements for petroleum UST systems.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 28 2012-07-01 2012-07-01 false Requirements for petroleum UST systems... UNDERGROUND STORAGE TANKS (UST) Release Detection § 280.41 Requirements for petroleum UST systems. Owners and operators of petroleum UST systems must provide release detection for tanks and piping as follows: (a)...

  16. 40 CFR 280.41 - Requirements for petroleum UST systems.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 26 2010-07-01 2010-07-01 false Requirements for petroleum UST systems... UNDERGROUND STORAGE TANKS (UST) Release Detection § 280.41 Requirements for petroleum UST systems. Owners and operators of petroleum UST systems must provide release detection for tanks and piping as follows: (a)...

  17. Research Requirements for Future Visual Guidance Systems

    DTIC Science & Technology

    1994-02-01

    operations at SEATAC International Airport in Washington. Future research efforts will be needed to develop surface guidance systems that will assist air... Airport in Washington State. Because of frequently occurring low-visibility conditions, SEATAC was considered an ideal location for the testing of...been carried out in the United States at JFK Airport in New York in the late 1980’s (reference 21). The costs of retrofitting the SEATAC airport with

  18. Biomedical Requirements for High Productivity Computing Systems

    DTIC Science & Technology

    2005-04-01

    conformations can be embodied in the program46. (Shimizu and Bray, p . 215). Systems Biology Analysis Methods Commonly used analysis methods for...pathologies and cellular level information to gain more robust information about heart function. 8.10 Adam P . Arkin, Ph.D. Faculty Scientist, Physical...solvers CVODE, LSODE, LSODA, Radau , and Dopri5, the and the PDE solvers Tom 690 and Toms731. It also includes root solvers, delay lines, and matrix

  19. Shielding Requirements for Particle Bed Propulsion Systems.

    DTIC Science & Technology

    1991-06-01

    neutron and gamma ray fluxes throughout the system. The difficulty in solving the equation arises from the fact that one side is differential and the other...the flux calculations. A zero order representation uses a monoenergetic, isotropic source. A first order approximation uses the multigroup diffusion...DIMENSIONS RESULTS MODIFY CRITERIA SHIELD NO FLUX & HEATING MAP Figure 4: Calculational Procedure 7 The K’s for neutron radiation radiation are given

  20. Display Systems Dynamics Requirements for Flying Qualities

    DTIC Science & Technology

    1988-05-09

    augmentation of the aircraft dynamics by a control system has been studied extensively, with current and evolving standards in existence. Consideration of the...MOTIVATION AND OBJECTIVES Current and emerging military aircraft present a number of challenges with respect to ".." ensuring good flying qualities... current and emerging military aircraft and the often costly consequences of poor design with respect to flying qualifies, such guidelines should be

  1. Industrial process driven system requirements for PSII applications

    SciTech Connect

    Munson, C.P.

    1997-10-01

    Plasma Source Ion Implantation (PSII) is a room temperature, plasma-based surface enhancement technology which is being commercialized through the efforts of a group of companies. A number of issues are critical to the successful design and operation of a commercial PSII system. These include overall vacuum system design, plasma source requirements and plasma-target interaction considerations, pulsed, high voltage sub-system (typically referred to as modulator) requirements, and target requirements and limitations. Critical system components are outlined and overall system design will be briefly covered.

  2. Solid Waste Information and Tracking System (SWITS) Software Requirements Specification

    SciTech Connect

    MAY, D.L.

    2000-03-22

    This document is the primary document establishing requirements for the Solid Waste Information and Tracking System (SWITS) as it is converted to a client-server architecture. The purpose is to provide the customer and the performing organizations with the requirements for the SWITS in the new environment. This Software Requirement Specification (SRS) describes the system requirements for the SWITS Project, and follows the PHMC Engineering Requirements, HNF-PRO-1819, and Computer Software Qualify Assurance Requirements, HNF-PRO-309, policies. This SRS includes sections on general description, specific requirements, references, appendices, and index. The SWITS system defined in this document stores information about the solid waste inventory on the Hanford site. Waste is tracked as it is generated, analyzed, shipped, stored, and treated. In addition to inventory reports a number of reports for regulatory agencies are produced.

  3. 47 CFR 73.33 - Antenna systems; showing required.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 4 2010-10-01 2010-10-01 false Antenna systems; showing required. 73.33... RADIO BROADCAST SERVICES AM Broadcast Stations § 73.33 Antenna systems; showing required. (a) An application for authority to install a broadcast antenna shall specify a definite site and include...

  4. 47 CFR 73.33 - Antenna systems; showing required.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 4 2011-10-01 2011-10-01 false Antenna systems; showing required. 73.33... RADIO BROADCAST SERVICES AM Broadcast Stations § 73.33 Antenna systems; showing required. (a) An application for authority to install a broadcast antenna shall specify a definite site and include...

  5. 47 CFR 73.33 - Antenna systems; showing required.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 4 2014-10-01 2014-10-01 false Antenna systems; showing required. 73.33... RADIO BROADCAST SERVICES AM Broadcast Stations § 73.33 Antenna systems; showing required. (a) An application for authority to install a broadcast antenna shall specify a definite site and include...

  6. 47 CFR 73.33 - Antenna systems; showing required.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 4 2013-10-01 2013-10-01 false Antenna systems; showing required. 73.33... RADIO BROADCAST SERVICES AM Broadcast Stations § 73.33 Antenna systems; showing required. (a) An application for authority to install a broadcast antenna shall specify a definite site and include...

  7. 47 CFR 73.33 - Antenna systems; showing required.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 4 2012-10-01 2012-10-01 false Antenna systems; showing required. 73.33... RADIO BROADCAST SERVICES AM Broadcast Stations § 73.33 Antenna systems; showing required. (a) An application for authority to install a broadcast antenna shall specify a definite site and include...

  8. 47 CFR 73.317 - FM transmission system requirements.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 4 2011-10-01 2011-10-01 false FM transmission system requirements. 73.317 Section 73.317 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES FM Broadcast Stations § 73.317 FM transmission system requirements. (a)...

  9. 47 CFR 73.317 - FM transmission system requirements.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 4 2010-10-01 2010-10-01 false FM transmission system requirements. 73.317 Section 73.317 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES FM Broadcast Stations § 73.317 FM transmission system requirements. (a)...

  10. 47 CFR 73.317 - FM transmission system requirements.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 4 2013-10-01 2013-10-01 false FM transmission system requirements. 73.317 Section 73.317 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES FM Broadcast Stations § 73.317 FM transmission system requirements. (a)...

  11. 47 CFR 73.317 - FM transmission system requirements.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 4 2012-10-01 2012-10-01 false FM transmission system requirements. 73.317 Section 73.317 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES FM Broadcast Stations § 73.317 FM transmission system requirements. (a)...

  12. 47 CFR 73.317 - FM transmission system requirements.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 4 2014-10-01 2014-10-01 false FM transmission system requirements. 73.317 Section 73.317 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES FM Broadcast Stations § 73.317 FM transmission system requirements. (a)...

  13. 2 CFR 25.215 - Requirements for agency information systems.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 2 Grants and Agreements 1 2014-01-01 2014-01-01 false Requirements for agency information systems... information related to the awards, and other systems as appropriate, are able to accept and use the DUNS... UNIVERSAL IDENTIFIER AND CENTRAL CONTRACTOR REGISTRATION Policy § 25.215 Requirements for agency...

  14. 7 CFR 1767.12 - Accounting system requirements.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Borrowers, herein, which prescribes accounting principles to be applied to specific factual circumstances. ... 7 Agriculture 12 2010-01-01 2010-01-01 false Accounting system requirements. 1767.12 Section 1767..., DEPARTMENT OF AGRICULTURE (CONTINUED) ACCOUNTING REQUIREMENTS FOR RUS ELECTRIC BORROWERS Uniform System...

  15. Space station electric power system requirements and design

    NASA Technical Reports Server (NTRS)

    Teren, Fred

    1987-01-01

    An overview of the conceptual definition and design of the space station Electric Power System (EPS) is given. Responsibilities for the design and development of the EPS are defined. The EPS requirements are listed and discussed, including average and peak power requirements, contingency requirements, and fault tolerance. The most significant Phase B trade study results are summarized, and the design selections and rationale are given. Finally, the power management and distribution system architecture is presented.

  16. Space Station electric power system requirements and design

    NASA Technical Reports Server (NTRS)

    Teren, Fred

    1987-01-01

    An overview of the conceptual definition and design of the Space Station Electric Power System (EPS) is given. Responsibilities for the design and development of the EPS are defined. The EPS requirements are listed and discussed, including average and peak power requirements, contingency requirements, and fault tolerance. The most significant Phase B trade study results are summarized, and the design selections and rationale are given. Finally, the power management and distribution system architecture is presented.

  17. 23 CFR 972.204 - Management systems requirements.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... to operate and maintain the management systems and their associated databases; and (5) A process for... 23 Highways 1 2013-04-01 2013-04-01 false Management systems requirements. 972.204 Section 972.204... WILDLIFE SERVICE MANAGEMENT SYSTEMS Fish and Wildlife Service Management Systems § 972.204...

  18. 23 CFR 970.204 - Management systems requirements.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... the management systems and their associated databases; and (5) A process for data collection, processing, analysis and updating for each management system. (d) All management systems will use databases... 23 Highways 1 2010-04-01 2010-04-01 false Management systems requirements. 970.204 Section...

  19. 23 CFR 971.204 - Management systems requirements.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... maintain the management systems and their associated databases; and (5) A process for data collection, processing, analysis, and updating for each management system. (c) All management systems will use databases... 23 Highways 1 2013-04-01 2013-04-01 false Management systems requirements. 971.204 Section...

  20. 23 CFR 972.204 - Management systems requirements.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... to operate and maintain the management systems and their associated databases; and (5) A process for... 23 Highways 1 2012-04-01 2012-04-01 false Management systems requirements. 972.204 Section 972.204... WILDLIFE SERVICE MANAGEMENT SYSTEMS Fish and Wildlife Service Management Systems § 972.204...

  1. 23 CFR 971.204 - Management systems requirements.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... maintain the management systems and their associated databases; and (5) A process for data collection, processing, analysis, and updating for each management system. (c) All management systems will use databases... 23 Highways 1 2011-04-01 2011-04-01 false Management systems requirements. 971.204 Section...

  2. 23 CFR 971.204 - Management systems requirements.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... maintain the management systems and their associated databases; and (5) A process for data collection, processing, analysis, and updating for each management system. (c) All management systems will use databases... 23 Highways 1 2014-04-01 2014-04-01 false Management systems requirements. 971.204 Section...

  3. 23 CFR 970.204 - Management systems requirements.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... the management systems and their associated databases; and (5) A process for data collection, processing, analysis and updating for each management system. (d) All management systems will use databases... 23 Highways 1 2013-04-01 2013-04-01 false Management systems requirements. 970.204 Section...

  4. 23 CFR 970.204 - Management systems requirements.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... the management systems and their associated databases; and (5) A process for data collection, processing, analysis and updating for each management system. (d) All management systems will use databases... 23 Highways 1 2012-04-01 2012-04-01 false Management systems requirements. 970.204 Section...

  5. 23 CFR 971.204 - Management systems requirements.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... maintain the management systems and their associated databases; and (5) A process for data collection, processing, analysis, and updating for each management system. (c) All management systems will use databases... 23 Highways 1 2010-04-01 2010-04-01 false Management systems requirements. 971.204 Section...

  6. 23 CFR 972.204 - Management systems requirements.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... to operate and maintain the management systems and their associated databases; and (5) A process for... 23 Highways 1 2010-04-01 2010-04-01 false Management systems requirements. 972.204 Section 972.204... WILDLIFE SERVICE MANAGEMENT SYSTEMS Fish and Wildlife Service Management Systems § 972.204...

  7. 23 CFR 970.204 - Management systems requirements.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... the management systems and their associated databases; and (5) A process for data collection, processing, analysis and updating for each management system. (d) All management systems will use databases... 23 Highways 1 2014-04-01 2014-04-01 false Management systems requirements. 970.204 Section...

  8. 23 CFR 971.204 - Management systems requirements.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... maintain the management systems and their associated databases; and (5) A process for data collection, processing, analysis, and updating for each management system. (c) All management systems will use databases... 23 Highways 1 2012-04-01 2012-04-01 false Management systems requirements. 971.204 Section...

  9. 23 CFR 972.204 - Management systems requirements.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... to operate and maintain the management systems and their associated databases; and (5) A process for... 23 Highways 1 2014-04-01 2014-04-01 false Management systems requirements. 972.204 Section 972.204... WILDLIFE SERVICE MANAGEMENT SYSTEMS Fish and Wildlife Service Management Systems § 972.204...

  10. 23 CFR 972.204 - Management systems requirements.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... to operate and maintain the management systems and their associated databases; and (5) A process for... 23 Highways 1 2011-04-01 2011-04-01 false Management systems requirements. 972.204 Section 972.204... WILDLIFE SERVICE MANAGEMENT SYSTEMS Fish and Wildlife Service Management Systems § 972.204...

  11. Information Requirements for a Procurement Management Information System.

    DTIC Science & Technology

    1975-08-01

    Management Information System is...described and some justification for this type of procurement management information system is presented. A literature search was made to determine...information systems. If information requirements are correctly identified and satisfied by a procurement management information system , contract administration and procurement management can be

  12. 2 CFR 25.215 - Requirements for agency information systems.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 2 Grants and Agreements 1 2013-01-01 2013-01-01 false Requirements for agency information systems... information systems. Each agency that makes awards (as defined in § 25.325) must ensure that systems processing information related to the awards, and other systems as appropriate, are able to accept and...

  13. 2 CFR 25.215 - Requirements for agency information systems.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 2 Grants and Agreements 1 2012-01-01 2012-01-01 false Requirements for agency information systems... information systems. Each agency that makes awards (as defined in § 25.325) must ensure that systems processing information related to the awards, and other systems as appropriate, are able to accept and...

  14. A box full of chocolates: The rich structure of the nearby stellar halo revealed by Gaia and RAVE

    NASA Astrophysics Data System (ADS)

    Helmi, Amina; Veljanoski, Jovan; Breddels, Maarten A.; Tian, Hao; Sales, Laura V.

    2017-01-01

    Context. The hierarchical structure formation model predicts that stellar halos should form, at least partly, via mergers. If this was a predominant formation channel for the Milky Way's halo, imprints of this merger history in the form of moving groups or streams should also exist in the vicinity of the Sun. Aims: We study the kinematics of halo stars in the Solar neighbourhood using the very recent first data release from the Gaia mission, and in particular the TGAS dataset, in combination with data from the RAVE survey. Our aim is to determine the amount of substructure present in the phase-space distribution of halo stars that could be linked to merger debris. Methods: To characterise kinematic substructure, we measured the velocity correlation function in our sample of halo (low-metallicity) stars. We also studied the distribution of these stars in the space of energy and two components of the angular momentum, in what we call "integrals of motion" space. Results: The velocity correlation function reveals substructure in the form of an excess of pairs of stars with similar velocities, well above that expected for a smooth distribution. Comparison to cosmological simulations of the formation of stellar halos indicates that the levels found are consistent with the Galactic halo having been built solely via accretion. Similarly, the distribution of stars in the space of integrals of motion is highly complex. A strikingly high fraction (from 58% up to more than 73%) of the stars that are somewhat less bound than the Sun are on (highly) retrograde orbits. A simple comparison to Milky Way-mass galaxies in cosmological hydrodynamical simulations suggests that less than 1% have such prominently retrograde outer halos. We also identify several other statistically significant structures in integrals of motion space that could potentially be related to merger events.

  15. Space Station Information System requirements for integrated communications

    NASA Technical Reports Server (NTRS)

    Marker, W.; Whitelaw, V.; Muratore, J.; Bigham, J., Jr.

    1987-01-01

    Space Station Information System (SSIS) requirements for integrated end-to-end communications are presented. The SSIS is defined as the integrated set of space and ground data and information systems and networks which will provide required data services to the Space Station flight crew, ground operations personnel, and customer communities. This model is based on the International Standards Organization (ISO) layered model for Open System Interconnection (OSI). These SSIS requirements include grades of service, priority classifications, systems management, flow control, bandwidth allocation, and standard SSIS data services.

  16. Expert system verification and validation study. Phase 2: Requirements Identification. Delivery 2: Current requirements applicability

    NASA Technical Reports Server (NTRS)

    1991-01-01

    The second phase of a task is described which has the ultimate purpose of ensuring that adequate Expert Systems (ESs) Verification and Validation (V and V) tools and techniques are available for Space Station Freedom Program Knowledge Based Systems development. The purpose of this phase is to recommend modifications to current software V and V requirements which will extend the applicability of the requirements to NASA ESs.

  17. Power system requirements and definition for lunar and Mars outposts

    NASA Technical Reports Server (NTRS)

    Petri, D. A.; Cataldo, R. L.; Bozek, J. M.

    1990-01-01

    Candidate power systems being considered for outpost facilities (stationary power systems) and vehicles (mobile systems) are discussed, including solar, chemical, isotopic, and reactor. The current power strategy was an initial outpost power system composed of photovoltaic arrays for daytime energy needs and regenerative fuel cells for power during the long lunar night. As day and night power demands grow, the outpost transitions to nuclear-based power generation, using thermoelectric conversion initially and evolving to a dynamic conversion system. With this concept as a guideline, a set of requirements has been established, and a reference definition of candidate power systems meeting these requirements has been identified.

  18. QUality Assessment of System Architectures and their Requirements (QUASAR)

    DTIC Science & Technology

    2010-05-18

    2010 Carnegie Mellon University QUality Assessment of System Architectures and their Requirements ( QUASAR ) DoD and NDIA System-of-Systems...Architectures and their Requirements ( QUASAR ) 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d. PROJECT NUMBER 5e...Prescribed by ANSI Std Z39-18 2 QUASAR Version 3.1, 1 Hour Overview Donald Firesmith, 18 May 2010 © 2010 Carnegie Mellon University Topics History

  19. Technology requirements for a generic aerocapture system. [for atmospheric entry

    NASA Technical Reports Server (NTRS)

    Cruz, M. I.

    1980-01-01

    The technology requirements for the design of a generic aerocapture vehicle system are summarized. These spacecraft have the capability of completely eliminating fuel-costly retropropulsion for planetary orbit capture through a single aerodynamically controlled atmospheric braking pass from a hyperbolic trajectory into a near circular orbit. This generic system has application at both the inner and outer planets. Spacecraft design integration, navigation, communications, and aerothermal protection system design problems were assessed in the technology requirements study and are discussed in this paper.

  20. Space Transportation System Availability Requirements and Its Influencing Attributes Relationships

    NASA Technical Reports Server (NTRS)

    Rhodes, Russell E.; Adams, Timothy C.; McCleskey, Carey M.

    2008-01-01

    It is important that engineering and management accept the need for an availability requirement that is derived with its influencing attributes. It is the intent of this paper to provide the visibility of relationships of these major attribute drivers (variables) to each other and the resultant system inherent availability. Also important to provide bounds of the variables providing engineering the insight required to control the system's engineering solution, e.g., these influencing attributes become design requirements also. These variables will drive the need to provide integration of similar discipline functions or technology selection to allow control of the total parts count. The relationship of selecting a reliability requirement will place a constraint on parts count to achieve a given availability requirement or if allowed to increase the parts count will drive the system reliability requirement higher. They also provide the understanding for the relationship of mean repair time (or mean down time) to maintainability, e.g., accessibility for repair, and both the mean time between failure, e.g., reliability of hardware and availability. The concerns and importance of achieving a strong availability requirement is driven by the need for affordability, the choice of using the two launch solution for the single space application, or the need to control the spare parts count needed to support the long stay in either orbit or on the surface of the moon. Understanding the requirements before starting the architectural design concept will avoid considerable time and money required to iterate the design to meet the redesign and assessment process required to achieve the results required of the customer's space transportation system. In fact the impact to the schedule to being able to deliver the system that meets the customer's needs, goals, and objectives may cause the customer to compromise his desired operational goal and objectives resulting in considerable

  1. Space Transportation System Availability Requirement and Its Influencing Attributes Relationships

    NASA Technical Reports Server (NTRS)

    Rhodes, Russell E.; Adams, Timothy C.; McCleskey, Carey M.

    2008-01-01

    It is important that engineering and management accept the need for an availability requirement that is derived with its influencing attributes. It is the intent of this paper to provide the visibility of relationships of these major attribute drivers (variables) to each other and the resultant system inherent availability. Also important to provide bounds of the variables providing engineering the insight required to control the system's engineering solution, e.g., these influencing attributes become design requirements also. These variables will drive the need to provide integration of similar discipline functions or technology selection to allow control of the total parts count. The relationship of selecting a reliability requirement will place a constraint on parts count to achieve a given availability requirement or if allowed to increase the parts count will drive the system reliability requirement higher. They also provide the understanding for the relationship of mean repair time (or mean down time) to maintainability, e.g., accessibility for repair, and both the mean time between failure, e.g., reliability of hardware and availability. The concerns and importance of achieving a strong availability requirement is driven by the need for affordability, the choice of using the two launch solution for the single space application, or the need to control the spare parts count needed to support the long stay in either orbit or on the surface of the moon. Understanding the requirements before starting the architectural design concept will avoid considerable time and money required to iterate the design to meet the redesign and assessment process required to achieve the results required of the customer's space transportation system. In fact the impact to the schedule to being able to deliver the system that meets the customer's needs, goals, and objectives may cause the customer to compromise his desired operational goal and objectives resulting in considerable

  2. Digital Avionics Information System (DAIS): Training Requirements Analysis Model (TRAMOD).

    ERIC Educational Resources Information Center

    Czuchry, Andrew J.; And Others

    The training requirements analysis model (TRAMOD) described in this report represents an important portion of the larger effort called the Digital Avionics Information System (DAIS) Life Cycle Cost (LCC) Study. TRAMOD is the second of three models that comprise an LCC impact modeling system for use in the early stages of system development. As…

  3. 46 CFR 10.410 - Quality Standard System (QSS) requirements.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... institution certified under a national or international Quality Management System Standard as meeting one or... 46 Shipping 1 2014-10-01 2014-10-01 false Quality Standard System (QSS) requirements. 10.410... MERCHANT MARINER CREDENTIAL Training Courses and Programs § 10.410 Quality Standard System...

  4. 48 CFR 252.215-7002 - Cost estimating system requirements.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... historical costs, and other analyses used to generate cost estimates. (b) General. The Contractor shall... 48 Federal Acquisition Regulations System 3 2010-10-01 2010-10-01 false Cost estimating system... of Provisions And Clauses 252.215-7002 Cost estimating system requirements. As prescribed in...

  5. System Requirements for On-Line and Batch Retrieval.

    ERIC Educational Resources Information Center

    American Society for Information Science, Washington, DC. Special Interest Group on Computerized Retrieval Services.

    Three papers on system requirements for on-line and batch retrieval presented at the American Society for Information Science (ASIS) annual meeting are included here. At G.D. Searle, data for records related to pharmacology screening are used in a batch system, and an on-line system is used to search information on mutagenic, carcinogenic, and…

  6. Functional Requirements for an Electronic Work Package System

    SciTech Connect

    Oxstrand, Johanna H.

    2016-12-01

    This document provides a set of high level functional requirements for a generic electronic work package (eWP) system. The requirements have been identified by the U.S. nuclear industry as a part of the Nuclear Electronic Work Packages - Enterprise Requirements (NEWPER) initiative. The functional requirements are mainly applied to eWP system supporting Basic and Moderate types of smart documents, i.e., documents that have fields for recording input such as text, dates, numbers, and equipment status, and documents which incorporate additional functionalities such as form field data “type“ validation (e.g. date, text, number, and signature) of data entered and/or self-populate basic document information (usually from existing host application meta data) on the form when the user first opens it. All the requirements are categorized by the roles; Planner, Supervisor, Craft, Work Package Approval Reviewer, Operations, Scheduling/Work Control, and Supporting Functions. The categories Statistics, Records, Information Technology are also included used to group the requirements. All requirements are presented in Section 2 through Section 11. Examples of more detailed requirements are provided for the majority of high level requirements. These examples are meant as an inspiration to be used as each utility goes through the process of identifying their specific requirements. The report’s table of contents provides a summary of the high level requirements.

  7. Tank waste remediation system functions and requirements document

    SciTech Connect

    Carpenter, K.E

    1996-10-03

    This is the Tank Waste Remediation System (TWRS) Functions and Requirements Document derived from the TWRS Technical Baseline. The document consists of several text sections that provide the purpose, scope, background information, and an explanation of how this document assists the application of Systems Engineering to the TWRS. The primary functions identified in the TWRS Functions and Requirements Document are identified in Figure 4.1 (Section 4.0) Currently, this document is part of the overall effort to develop the TWRS Functional Requirements Baseline, and contains the functions and requirements needed to properly define the top three TWRS function levels. TWRS Technical Baseline information (RDD-100 database) included in the appendices of the attached document contain the TWRS functions, requirements, and architecture necessary to define the TWRS Functional Requirements Baseline. Document organization and user directions are provided in the introductory text. This document will continue to be modified during the TWRS life-cycle.

  8. Towards Requirements in Systems Engineering for Aerospace IVHM Design

    NASA Technical Reports Server (NTRS)

    Saxena, Abhinav; Roychoudhury, Indranil; Lin, Wei; Goebel, Kai

    2013-01-01

    Health management (HM) technologies have been employed for safety critical system for decades, but a coherent systematic process to integrate HM into the system design is not yet clear. Consequently, in most cases, health management resorts to be an after-thought or 'band-aid' solution. Moreover, limited guidance exists for carrying out systems engineering (SE) on the subject of writing requirements for designs with integrated vehicle health management (IVHM). It is well accepted that requirements are key to developing a successful IVHM system right from the concept stage to development, verification, utilization, and support. However, writing requirements for systems with IVHM capability have unique challenges that require the designers to look beyond their own domains and consider the constraints and specifications of other interlinked systems. In this paper we look at various stages in the SE process and identify activities specific to IVHM design and development. More importantly, several relevant questions are posed that system engineers must address at various design and development stages. Addressing these questions should provide some guidance to systems engineers towards writing IVHM related requirements to ensure that appropriate IVHM functions are built into the system design.

  9. State analysis requirements database for engineering complex embedded systems

    NASA Technical Reports Server (NTRS)

    Bennett, Matthew B.; Rasmussen, Robert D.; Ingham, Michel D.

    2004-01-01

    It has become clear that spacecraft system complexity is reaching a threshold where customary methods of control are no longer affordable or sufficiently reliable. At the heart of this problem are the conventional approaches to systems and software engineering based on subsystem-level functional decomposition, which fail to scale in the tangled web of interactions typically encountered in complex spacecraft designs. Furthermore, there is a fundamental gap between the requirements on software specified by systems engineers and the implementation of these requirements by software engineers. Software engineers must perform the translation of requirements into software code, hoping to accurately capture the systems engineer's understanding of the system behavior, which is not always explicitly specified. This gap opens up the possibility for misinterpretation of the systems engineer's intent, potentially leading to software errors. This problem is addressed by a systems engineering tool called the State Analysis Database, which provides a tool for capturing system and software requirements in the form of explicit models. This paper describes how requirements for complex aerospace systems can be developed using the State Analysis Database.

  10. Propulsion element requirements using electrical power system unscheduled power

    NASA Technical Reports Server (NTRS)

    Zimmermann, Frank; Hodge, Kathy

    1989-01-01

    The suitability of using the electrical energy from the Space Station's Electrical Power System (EPS) during the periods of peak solar insolation which is currently not specifically allocated (unscheduled power) to produce propulsion propellants, gaseous hydrogen, and oxygen by electrolyzing water is investigated. Reboost propellant requirements are emphasized, but the results are more generally relevant because the balance of recurring propellant requirements are an order of magnitude smaller and the nonrecurring requirements are not significant on an average basis.

  11. Development and analysis of SCR requirements tables for system scenarios

    NASA Technical Reports Server (NTRS)

    Callahan, John R.; Morrison, Jeffery L.

    1995-01-01

    We describe the use of scenarios to develop and refine requirement tables for parts of the Earth Observing System Data and Information System (EOSDIS). The National Aeronautics and Space Administration (NASA) is developing EOSDIS as part of its Mission-To-Planet-Earth (MTPE) project to accept instrument/platform observation requests from end-user scientists, schedule and perform requested observations of the Earth from space, collect and process the observed data, and distribute data to scientists and archives. Current requirements for the system are managed with tools that allow developers to trace the relationships between requirements and other development artifacts, including other requirements. In addition, the user community (e.g., earth and atmospheric scientists), in conjunction with NASA, has generated scenarios describing the actions of EOSDIS subsystems in response to user requests and other system activities. As part of a research effort in verification and validation techniques, this paper describes our efforts to develop requirements tables from these scenarios for the EOSDIS Core System (ECS). The tables specify event-driven mode transitions based on techniques developed by the Naval Research Lab's (NRL) Software Cost Reduction (SCR) project. The SCR approach has proven effective in specifying requirements for large systems in an unambiguous, terse format that enhance identification of incomplete and inconsistent requirements. We describe development of SCR tables from user scenarios and identify the strengths and weaknesses of our approach in contrast to the requirements tracing approach. We also evaluate the capabilities of both approach to respond to the volatility of requirements in large, complex systems.

  12. Information systems requirements for the Microgravity Science and Applications Program

    NASA Technical Reports Server (NTRS)

    Kicza, M. E.; Kreer, J. R.

    1991-01-01

    NASA's Microgravity Science and Applications (MSAD) Program is presented. Additionally, the types of information produced wiithin the program and the anticipated growth in information system requirements as the program transitions to Space Station Freedom utilization are discussed. Plans for payload operations support in the Freedom era are addressed, as well as current activities to define research community requirements for data and sample archives.

  13. National Ignition Facility system design requirements conventional facilities SDR001

    SciTech Connect

    Hands, J.

    1996-04-09

    This System Design Requirements (SDR) document specifies the functions to be performed and the minimum design requirements for the National Ignition Facility (NIF) site infrastructure and conventional facilities. These consist of the physical site and buildings necessary to house the laser, target chamber, target preparation areas, optics support and ancillary functions.

  14. 14 CFR 121.127 - Flight following system; requirements.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Flight following system; requirements. 121.127 Section 121.127 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF... OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Approval of Areas and Routes...

  15. Design and Test Requirements for Space Flight Pressurized Systems

    DTIC Science & Technology

    2014-11-26

    establishes the baseline requirements for the design, fabrication, assembly, installation, test, inspection, operation, and maintenance of pressure systems...18 4.8 Operation and Maintenance Requirements ..................................................................... 18 4.8.1 Operating Procedure...18 4.8.2 Inspection and Maintenance

  16. Information systems requirements for the microgravity science and applications program

    NASA Technical Reports Server (NTRS)

    Kicza, M. E.; Kreer, J. R.

    1990-01-01

    NASA's Microgravity Science and Applications (MSAD) Program is presented. Additionally, the types of information produced within the program and the anticipated growth in information system requirements as the program transitions to Space Station Freedom utilization are discussed. Plans for payload operations support in the Freedom era are addressed, as well as current activities to define research community requirements for data and sample archives.

  17. Data requirements analysis in support of system safety

    NASA Technical Reports Server (NTRS)

    Pinkel, I.

    1971-01-01

    The development of a user-oriented safety data bank is reported and its data requirements are outlined. The information retrieval system employed is described along with the problems involved in its establishment and operation.

  18. 27 CFR 25.41 - Measuring system required.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ..., DEPARTMENT OF THE TREASURY LIQUORS BEER Measurement of Beer § 25.41 Measuring system required. The brewer shall accurately and reliably measure the quantity of beer transferred from the brewery cellars...

  19. 27 CFR 25.41 - Measuring system required.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ..., DEPARTMENT OF THE TREASURY ALCOHOL BEER Measurement of Beer § 25.41 Measuring system required. The brewer shall accurately and reliably measure the quantity of beer transferred from the brewery cellars...

  20. 27 CFR 25.41 - Measuring system required.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ..., DEPARTMENT OF THE TREASURY ALCOHOL BEER Measurement of Beer § 25.41 Measuring system required. The brewer shall accurately and reliably measure the quantity of beer transferred from the brewery cellars...

  1. 27 CFR 25.41 - Measuring system required.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ..., DEPARTMENT OF THE TREASURY LIQUORS BEER Measurement of Beer § 25.41 Measuring system required. The brewer shall accurately and reliably measure the quantity of beer transferred from the brewery cellars...

  2. 27 CFR 25.41 - Measuring system required.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ..., DEPARTMENT OF THE TREASURY LIQUORS BEER Measurement of Beer § 25.41 Measuring system required. The brewer shall accurately and reliably measure the quantity of beer transferred from the brewery cellars...

  3. Classification and certification requirements for floating production systems

    SciTech Connect

    Bowie, R.D.; Richardson, K.L.

    1995-12-31

    Floating Production Systems (FPSs) can be either, custom built or a converted semi-submersible, tanker or barge. The paper describes the necessary steps to be taken for the Classification and Certification of FPSs and FPSOS. The paper outlines the latest Classification and certification requirements for both semi-submersible and ship type FPSS. Classification and regulatory requirements for the Hull Structure, Stability, Station Keeping, Shipboard and Production Systems are discussed.

  4. Ground Systems Development Environment (GSDE) interface requirements and prototyping plan

    NASA Technical Reports Server (NTRS)

    Church, Victor E.; Philips, John; Bassman, Mitchell; Williams, C.

    1990-01-01

    This report describes the data collection and requirements analysis effort of the Ground System Development Environment (GSDE) Interface Requirements study. It identifies potential problems in the interfaces among applications and processors in the heterogeneous systems that comprises the GSDE. It describes possible strategies for addressing those problems. It also identifies areas for further research and prototyping to demonstrate the capabilities and feasibility of those strategies and defines a plan for building the necessary software prototypes.

  5. Energy Emergency Management Information System (EEMIS): functional requirements

    SciTech Connect

    Not Available

    1980-10-17

    This report deals with the functional requirements of the Energy Emergency Management Information System (EEMIS) as it is defined for State level use (EEMIS-S). This report provides a technical description of the EEMIS-S requirements. These guidelines state that in order to create the widest practicable competition the system's requirements, with few exceptions, must be expressed in functional terms without reference to specific hardware or software products, and that wherever exceptions are made a statement of justification must be provided. In addition, these guidelines set forth a recommended maximum threshold limit of annual contract value for schedule contract procurements. Section 2.0 presents a general overview of the EEMIS structure in terms of requirements for vendor support. The functional requirements for each component are developed by section as: Teleprocessing Monitor Requirements, Section 3.0; EEMIS File Requirements, Section 4.0; Data Base Management Requirements, Section 5.0; Application Program Requirements, Section 6.0; and Utility Program Requirements, Section 7.0. The final Section, 8.0, justifies the use of the GSA Teleprocessing Service Program - Multiple Award Schedule Contracts (TSP-MASC) procurement process. The intent of this section is to substantiate, in this instance, the desirability of obtaining time-sharing vendor services to support EEMIS under a schedule contract, even if certain TSP-MASC threshold limits might be exceeded.

  6. The 30/20 GHz communications system functional requirements

    NASA Technical Reports Server (NTRS)

    Siperko, C. M.; Frankfort, M.; Markham, R.; Wall, M.

    1981-01-01

    The characteristics of 30/20 GHz usage in satellite systems to be used in support of projected communication requirements of the 1990's are defined. A requirements analysis which develops projected market demand for satellite services by general and specialized carriers and an analysis of the impact of propagation and system constraints on 30/20 GHz operation are included. A set of technical performance characteristics for the 30/20 GHz systems which can serve the resulting market demand and the experimental program necessary to verify technical and operational aspects of the proposed systems is also discussed.

  7. Requirements Management System Browser (RMSB) software design description

    SciTech Connect

    Frank, D.D.

    1996-09-30

    The purpose of this document is to provide an ``as-built`` design description for the Requirements Management System Browser (RMSB) application. The Graphical User Interface (GUI) and database structure design are described for the RMSB application, referred to as the ``Browser.`` The RMSB application provides an easy to use PC-based interface to browse systems engineering data stored and managed in a UNIX software application. The system engineering data include functions, requirements, and architectures that make up the Tank Waste Remediation System (TWRS) technical baseline.

  8. Establishing performance requirements of computer based systems subject to uncertainty

    SciTech Connect

    Robinson, D.

    1997-02-01

    An organized systems design approach is dictated by the increasing complexity of computer based systems. Computer based systems are unique in many respects but share many of the same problems that have plagued design engineers for decades. The design of complex systems is difficult at best, but as a design becomes intensively dependent on the computer processing of external and internal information, the design process quickly borders chaos. This situation is exacerbated with the requirement that these systems operate with a minimal quantity of information, generally corrupted by noise, regarding the current state of the system. Establishing performance requirements for such systems is particularly difficult. This paper briefly sketches a general systems design approach with emphasis on the design of computer based decision processing systems subject to parameter and environmental variation. The approach will be demonstrated with application to an on-board diagnostic (OBD) system for automotive emissions systems now mandated by the state of California and the Federal Clean Air Act. The emphasis is on an approach for establishing probabilistically based performance requirements for computer based systems.

  9. Analyzing Software Requirements Errors in Safety-Critical, Embedded Systems

    NASA Technical Reports Server (NTRS)

    Lutz, Robyn R.

    1993-01-01

    This paper analyzes the root causes of safety-related software errors in safety-critical, embedded systems. The results show that software errors identified as potentially hazardous to the system tend to be produced by different error mechanisms than non- safety-related software errors. Safety-related software errors are shown to arise most commonly from (1) discrepancies between the documented requirements specifications and the requirements needed for correct functioning of the system and (2) misunderstandings of the software's interface with the rest of the system. The paper uses these results to identify methods by which requirements errors can be prevented. The goal is to reduce safety-related software errors and to enhance the safety of complex, embedded systems.

  10. Reliability program requirements for aeronautical and space system contractors

    NASA Technical Reports Server (NTRS)

    1987-01-01

    General reliability program requirements for NASA contracts involving the design, development, fabrication, test, and/or use of aeronautical and space systems including critical ground support equipment are prescribed. The reliability program requirements require (1) thorough planning and effective management of the reliability effort; (2) definition of the major reliability tasks and their place as an integral part of the design and development process; (3) planning and evaluating the reliability of the system and its elements (including effects of software interfaces) through a program of analysis, review, and test; and (4) timely status indication by formal documentation and other reporting to facilitate control of the reliability program.

  11. Ground Systems Development Environment (GSDE) interface requirements analysis

    NASA Technical Reports Server (NTRS)

    Church, Victor E.; Philips, John; Hartenstein, Ray; Bassman, Mitchell; Ruskin, Leslie; Perez-Davila, Alfredo

    1991-01-01

    A set of procedural and functional requirements are presented for the interface between software development environments and software integration and test systems used for space station ground systems software. The requirements focus on the need for centralized configuration management of software as it is transitioned from development to formal, target based testing. This concludes the GSDE Interface Requirements study. A summary is presented of findings concerning the interface itself, possible interface and prototyping directions for further study, and results of the investigation of the Cronus distributed applications environment.

  12. Reliability program requirements for Space and Terrestrial Nuclear Power Systems

    SciTech Connect

    Not Available

    1982-10-01

    The objectives of the reliability program requirements described in this report are (1) to provide contractors with an outline of the reliability requirements established by the Department of Energy (DOE) in the areas of design, development, production, testing, and acceptance of space and terrestrial nuclear systems hardware, and (2) to guide the contractor in meeting these requirements. This publication or particular portions of it is applicable as specified in the contract. Whether the contractors/subcontractors are subject to all the requirements or only to part of them will be specified by contract, program letter, or by the contract statement-of-work.

  13. Monitored Retrievable Storage System Requirements Document. Revision 1

    SciTech Connect

    Not Available

    1994-03-01

    This Monitored Retrievable Storage System Requirements Document (MRS-SRD) describes the functions to be performed and technical requirements for a Monitored Retrievable Storage (MRS) facility subelement and the On-Site Transfer and Storage (OSTS) subelement. The MRS facility subelement provides for temporary storage, at a Civilian Radioactive Waste Management System (CRWMS) operated site, of spent nuclear fuel (SNF) contained in an NRC-approved Multi-Purpose Canister (MPC) storage mode, or other NRC-approved storage modes. The OSTS subelement provides for transfer and storage, at Purchaser sites, of spent nuclear fuel (SNF) contained in MPCs. Both the MRS facility subelement and the OSTS subelement are in support of the CRWMS. The purpose of the MRS-SRD is to define the top-level requirements for the development of the MRS facility and the OSTS. These requirements include design, operation, and decommissioning requirements to the extent they impact on the physical development of the MRS facility and the OSTS. The document also presents an overall description of the MRS facility and the OSTS, their functions (derived by extending the functional analysis documented by the Physical System Requirements (PSR) Store Waste Document), their segments, and the requirements allocated to the segments. In addition, the top-level interface requirements of the MRS facility and the OSTS are included. As such, the MRS-SRD provides the technical baseline for the MRS Safety Analysis Report (SAR) design and the OSTS Safety Analysis Report design.

  14. Patient Accounting Systems: Are They Fit with the Users' Requirements?

    PubMed Central

    Ayatollahi, Haleh; Nazemi, Zahra

    2016-01-01

    Objectives A patient accounting system is a subsystem of a hospital information system. This system like other information systems should be carefully designed to be able to meet users' requirements. The main aim of this research was to investigate users' requirements and to determine whether current patient accounting systems meet users' needs or not. Methods This was a survey study, and the participants were the users of six patient accounting systems used in 24 teaching hospitals. A stratified sampling method was used to select the participants (n = 216). The research instruments were a questionnaire and a checklist. The mean value of ≥3 showed the importance of each data element and the capability of the system. Results Generally, the findings showed that the current patient accounting systems had some weaknesses and were able to meet between 70% and 80% of users' requirements. Conclusions The current patient accounting systems need to be improved to be able to meet users' requirements. This approach can also help to provide hospitals with more usable and reliable financial information. PMID:26893945

  15. Mined Geologic Disposal System Requirements Document. Revision 1

    SciTech Connect

    Not Available

    1994-03-01

    This Mined Geologic Disposal System Requirements Document (MGDS-RD) describes the functions to be performed by, and the requirements for, a Mined Geologic Disposal System (MGDS) for the permanent disposal of spent nuclear fuel (SNF) (including SNF loaded in multi-purpose canisters (MPCs)) and commercial and defense high-level radioactive waste (HLW) in support of the Civilian Radioactive Waste Management System (CRWMS). The purpose of the MGDS-RD is to define the program-level requirements for the design of the Repository, the Exploratory Studies Facility (ESF), and Surface Based Testing Facilities (SBTF). These requirements include design, operation, and decommissioning requirements to the extent they impact on the physical development of the MGDS. The document also presents an overall description of the MGDS, its functions (derived using the functional analysis documented by the Physical System Requirements (PSR) documents as a starting point), its segments as described in Section 3.1.3, and the requirements allocated to the segments. In addition, the program-level interfaces of the MGDS are identified. As such, the MGDS-RD provides the technical baseline for the design of the MGDS.

  16. Requirements for a Global Greenhouse Gas Information System

    NASA Astrophysics Data System (ADS)

    Duren, R.; Boland, S.; Lempert, R.; Miller, C.

    2008-12-01

    A global greenhouse gas information system will prove a critical component of any successful effort to mitigate climate change which relies on limiting the atmospheric concentration of greenhouse gases. The system will provide the situational awareness necessary to actively reduce emissions, influence land use change, and sequester carbon. The information from such a system will be subject to intense scrutiny. Therefore, an effective system must openly and transparently produce data of unassailable quality. A global greenhouse gas information system will likely require a combination of space-and air-based remote- sensing assets, ground-based measurements, carbon cycle modeling and self-reporting. The specific requirements on such a system will be shaped by the degree of international cooperation it enjoys and the needs of the policy regime it aims to support, which might range from verifying treaty obligations, to certifying the tradable permits and offsets underlying a market in greenhouse gas emission reductions, to providing a comprehensive inventory of high and low emitters that could be used by non-governmental organizations and other international actors. While some technical studies have examined particular system components in single scenarios, there remains a need for a comprehensive survey of the range of potential requirements, options, and strategies for the overall system. We have initiated such a survey and recently hosted a workshop which engaged a diverse community of stakeholders to begin synthesizing requirements for such a system, with an initial focus on carbon dioxide. In this paper we describe our plan for completing the definition of the requirements, options, and strategies for a global greenhouse gas monitoring system. We discuss our overall approach and provide a status on the initial requirements synthesis activity.

  17. Structural Requirements for the Space Propulsion Engine Systems

    NASA Technical Reports Server (NTRS)

    Aggarwal, Pravin K.

    2006-01-01

    In January 2004, the National Aeronautics and Space Administration (NASA) was given a vision for Space Exploration by President Bush, setting our sight on a bold new path to go back to the Moon, then to Mars and beyond. As NASA gets ready to meet the vision set by President Bush, failures are not an option. Reliability of the propulsion engine systems will play an important role in establishing an overall safe and reliable operation of these new space systems. A new standard, NASA-STD-5012, Strength and Life Assessment for Space Propulsion System Engines, has been developed to provide structural requirements for assessment of the propulsion systems engine. This standard is a complement to the current NASA-wide standard NASA-STD-5001, Structural Design and Test Factors of Safety for Spaceflight Hardware, which excluded the requirement for the engine systems (rotatory structures) along with pressure vessels. As developed, this document builds on the heritage of the multiple industrial standards related to strength and life assessment of the structures. For assuring a safe and reliable operation of a product and/or mission, establishing a set of structural assessment requirements is a key ingredient. Hence, a concentrated effort was made to improve the requirements where there are known lessons learned during the design, test, and operation phases of the Space Shuttle Main Engine (SSME) and other engine development programs. Requirements delineated in this standard are also applicable for the reusable and/or human missions. It shall be noted that "reliability of a system cannot be tested and inspected but can only be achieved if it is first designed into a system." Hence, these strength and life assessment requirements for the space propulsion system engines shall be used along with other good engineering practices, requirements, and policies.

  18. Remote Sensing System Requirements Development: A Simulation-Based Approach

    NASA Technical Reports Server (NTRS)

    Zanoni, Vicki; Davis, Bruce; Ryan, Robert; Blonski, Slavomir; Gasser, Gerald

    2002-01-01

    Earth science research and application requirements for multispectral data have often been driven by currently available remote sensing technology. Few parametric studies exist that specify data required for certain applications. Consequently, data requirements are often defined based on the best data available or on what has worked successfully in the past. Since properites such as spatial resolution, swath width, spectral bands, signal-to-noise ratio (SNR), data quantization, and band-to-band registration drive sensor platform and spaceraft system architecture and cost, analysis of these criteria is important to objectively optimize system design. Remote sensing data requirements are also linked to calibration and characterization methods. Parameters such as spatial resolution, radiometric accuracy, and geopositional accuracy affect the complexity and cost of calibration methods. However, there are few studies that quantify the true accuracies required for specific problems. As calibration methods and standards are proposed, it is important that they be tied to well-known data requirements. The Application Research Toolbox (ART) developed at Stennis Space Center provides a simulation-based method for multispectral data requirements development. The ART produces simulated data sets from hyperspectral data through band synthesis. Parameters such as spectral band shape and width, SNR, data quantization, spatial resolution, and band-to-band registration can be varied to create many different simulated data products. Simulated data utility can then be assessed for different applications so that requirements can be better understood. This paper describes the ART and its applicability for rigorously deriving remote sensing data requirements.

  19. A Methodological Framework for Enterprise Information System Requirements Derivation

    NASA Astrophysics Data System (ADS)

    Caplinskas, Albertas; Paškevičiūtė, Lina

    Current information systems (IS) are enterprise-wide systems supporting strategic goals of the enterprise and meeting its operational business needs. They are supported by information and communication technologies (ICT) and other software that should be fully integrated. To develop software responding to real business needs, we need requirements engineering (RE) methodology that ensures the alignment of requirements for all levels of enterprise system. The main contribution of this chapter is a requirement-oriented methodological framework allowing to transform business requirements level by level into software ones. The structure of the proposed framework reflects the structure of Zachman's framework. However, it has other intentions and is purposed to support not the design but the RE issues.

  20. 29 CFR 1926.652 - Requirements for protective systems.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... appendices A, C and D. Designs for timber shoring in trenches shall be determined in accordance with the... of support systems from excavations. (2) Additional requirements for support systems for trench... calculated for the full depth of the trench, and there are no indications while the trench is open of...

  1. 29 CFR 1926.652 - Requirements for protective systems.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... appendices A, C and D. Designs for timber shoring in trenches shall be determined in accordance with the... of support systems from excavations. (2) Additional requirements for support systems for trench... calculated for the full depth of the trench, and there are no indications while the trench is open of...

  2. 29 CFR 1926.652 - Requirements for protective systems.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... appendices A, C and D. Designs for timber shoring in trenches shall be determined in accordance with the... of support systems from excavations. (2) Additional requirements for support systems for trench... calculated for the full depth of the trench, and there are no indications while the trench is open of...

  3. 29 CFR 1926.652 - Requirements for protective systems.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... appendices A, C and D. Designs for timber shoring in trenches shall be determined in accordance with the... of support systems from excavations. (2) Additional requirements for support systems for trench... calculated for the full depth of the trench, and there are no indications while the trench is open of...

  4. 29 CFR 1926.652 - Requirements for protective systems.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... appendices A, C and D. Designs for timber shoring in trenches shall be determined in accordance with the... of support systems from excavations. (2) Additional requirements for support systems for trench... calculated for the full depth of the trench, and there are no indications while the trench is open of...

  5. 19 CFR 143.5 - System performance requirements.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... THE TREASURY (CONTINUED) SPECIAL ENTRY PROCEDURES Automated Broker Interface § 143.5 System... are detailed in Customs Publication 552, Customs And Trade Automated Interface Requirements (CATAIR... must demonstrate that his system can interface directly with the Customs computer and ensure...

  6. 19 CFR 143.5 - System performance requirements.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... THE TREASURY (CONTINUED) SPECIAL ENTRY PROCEDURES Automated Broker Interface § 143.5 System... are detailed in Customs Publication 552, Customs And Trade Automated Interface Requirements (CATAIR... must demonstrate that his system can interface directly with the Customs computer and ensure...

  7. 19 CFR 143.5 - System performance requirements.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... THE TREASURY (CONTINUED) SPECIAL ENTRY PROCEDURES Automated Broker Interface § 143.5 System... are detailed in Customs Publication 552, Customs And Trade Automated Interface Requirements (CATAIR... must demonstrate that his system can interface directly with the Customs computer and ensure...

  8. 19 CFR 143.5 - System performance requirements.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... THE TREASURY (CONTINUED) SPECIAL ENTRY PROCEDURES Automated Broker Interface § 143.5 System... are detailed in Customs Publication 552, Customs And Trade Automated Interface Requirements (CATAIR... must demonstrate that his system can interface directly with the Customs computer and ensure...

  9. 19 CFR 143.5 - System performance requirements.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... THE TREASURY (CONTINUED) SPECIAL ENTRY PROCEDURES Automated Broker Interface § 143.5 System... are detailed in Customs Publication 552, Customs And Trade Automated Interface Requirements (CATAIR... must demonstrate that his system can interface directly with the Customs computer and ensure...

  10. 5 CFR 9701.405 - Performance management system requirements.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... requirements. 9701.405 Section 9701.405 Administrative Personnel DEPARTMENT OF HOMELAND SECURITY HUMAN RESOURCES MANAGEMENT SYSTEM (DEPARTMENT OF HOMELAND SECURITY-OFFICE OF PERSONNEL MANAGEMENT) DEPARTMENT OF HOMELAND SECURITY HUMAN RESOURCES MANAGEMENT SYSTEM Performance Management § 9701.405...

  11. Teaching the Free Enterprise System in Required Social Studies Courses.

    ERIC Educational Resources Information Center

    Texas Education Agency, Austin. Div. of Curriculum Development.

    Guidelines are provided for integrating the teaching of the American free enterprise system into required high school social studies courses, as specified in Texas school accreditation standards. Five sample instructional units are included: an introductory unit which defines the essentials and benefits of the free enterprise system, and four…

  12. 47 CFR 15.511 - Technical requirements for surveillance systems.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... surveillance systems operated by law enforcement, fire or emergency rescue organizations or by manufacturers... 90 of this chapter. (2) The operation of imaging systems under this section requires coordination, as... of this device is restricted to law enforcement, fire and rescue officials, public utilities,...

  13. 47 CFR 15.511 - Technical requirements for surveillance systems.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... surveillance systems operated by law enforcement, fire or emergency rescue organizations or by manufacturers... 90 of this chapter. (2) The operation of imaging systems under this section requires coordination, as... of this device is restricted to law enforcement, fire and rescue officials, public utilities,...

  14. 47 CFR 15.511 - Technical requirements for surveillance systems.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... surveillance systems operated by law enforcement, fire or emergency rescue organizations or by manufacturers... 90 of this chapter. (2) The operation of imaging systems under this section requires coordination, as... of this device is restricted to law enforcement, fire and rescue officials, public utilities,...

  15. 47 CFR 15.511 - Technical requirements for surveillance systems.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... surveillance systems operated by law enforcement, fire or emergency rescue organizations or by manufacturers... 90 of this chapter. (2) The operation of imaging systems under this section requires coordination, as... of this device is restricted to law enforcement, fire and rescue officials, public utilities,...

  16. National Maglev initiative: California line electric utility power system requirements

    NASA Technical Reports Server (NTRS)

    Save, Phil

    1994-01-01

    The electrical utility power system requirements were determined for a Maglev line from San Diego to San Francisco and Sacramento with a maximum capacity of 12,000 passengers an hour in each direction at a speed of 300 miles per hour, or one train every 30 seconds in each direction. Basically the Maglev line requires one 50-MVA substation every 12.5 miles. The need for new power lines to serve these substations and their voltage levels are based not only on equipment loading criteria but also on limitations due to voltage flicker and harmonics created by the Maglev system. The resulting power system requirements and their costs depend mostly on the geographical area, urban or suburban with 'strong' power systems, or mountains and rural areas with 'weak' power systems. A reliability evaluation indicated that emergency power sources, such as a 10-MW battery at each substation, were not justified if sufficient redundancy is provided in the design of the substations and the power lines serving them. With a cost of $5.6 M per mile, the power system requirements, including the 12-kV DC cables and the inverters along the Maglev line, were found to be the second largest cost component of the Maglev system, after the cost of the guideway system ($9.1 M per mile), out of a total cost of $23 M per mile.

  17. 47 CFR 73.49 - AM transmission system fencing requirements.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 4 2010-10-01 2010-10-01 false AM transmission system fencing requirements. 73.49 Section 73.49 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES AM Broadcast Stations § 73.49 AM transmission system fencing...

  18. 47 CFR 73.49 - AM transmission system fencing requirements.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 4 2013-10-01 2013-10-01 false AM transmission system fencing requirements. 73.49 Section 73.49 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES AM Broadcast Stations § 73.49 AM transmission system fencing...

  19. 47 CFR 73.49 - AM transmission system fencing requirements.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 4 2011-10-01 2011-10-01 false AM transmission system fencing requirements. 73.49 Section 73.49 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES AM Broadcast Stations § 73.49 AM transmission system fencing...

  20. 47 CFR 73.49 - AM transmission system fencing requirements.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 4 2014-10-01 2014-10-01 false AM transmission system fencing requirements. 73.49 Section 73.49 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES AM Broadcast Stations § 73.49 AM transmission system fencing...

  1. 47 CFR 73.49 - AM transmission system fencing requirements.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 4 2012-10-01 2012-10-01 false AM transmission system fencing requirements. 73.49 Section 73.49 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES AM Broadcast Stations § 73.49 AM transmission system fencing...

  2. 5 CFR 9701.405 - Performance management system requirements.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... requirements. 9701.405 Section 9701.405 Administrative Personnel DEPARTMENT OF HOMELAND SECURITY HUMAN RESOURCES MANAGEMENT SYSTEM (DEPARTMENT OF HOMELAND SECURITY-OFFICE OF PERSONNEL MANAGEMENT) DEPARTMENT OF HOMELAND SECURITY HUMAN RESOURCES MANAGEMENT SYSTEM Performance Management § 9701.405...

  3. 5 CFR 9701.405 - Performance management system requirements.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... requirements. 9701.405 Section 9701.405 Administrative Personnel DEPARTMENT OF HOMELAND SECURITY HUMAN RESOURCES MANAGEMENT SYSTEM (DEPARTMENT OF HOMELAND SECURITY-OFFICE OF PERSONNEL MANAGEMENT) DEPARTMENT OF HOMELAND SECURITY HUMAN RESOURCES MANAGEMENT SYSTEM Performance Management § 9701.405...

  4. National Ignition Facility sub-system design requirements integrated timing system SSDR 1.5.3

    SciTech Connect

    Wiedwald, J.; Van Aersau, P.; Bliss, E.

    1996-08-26

    This System Design Requirement document establishes the performance, design, development, and test requirements for the Integrated Timing System, WBS 1.5.3 which is part of the NIF Integrated Computer Control System (ICCS). The Integrated Timing System provides all temporally-critical hardware triggers to components and equipment in other NIF systems.

  5. Investigation of Propulsion System Requirements for Spartan Lite

    NASA Technical Reports Server (NTRS)

    Urban, Mike; Gruner, Timothy; Morrissey, James; Sneiderman, Gary

    1998-01-01

    This paper discusses the (chemical or electric) propulsion system requirements necessary to increase the Spartan Lite science mission lifetime to over a year. Spartan Lite is an extremely low-cost (less than 10 M) spacecraft bus being developed at the NASA Goddard Space Flight Center to accommodate sounding rocket class (40 W, 45 kg, 35 cm dia by 1 m length) payloads. While Spartan Lite is compatible with expendable launch vehicles, most missions are expected to be tertiary payloads deployed by. the Space Shuttle. To achieve a one year or longer mission life from typical Shuttle orbits, some form of propulsion system is required. Chemical propulsion systems (characterized by high thrust impulsive maneuvers) and electrical propulsion systems (characterized by low-thrust long duration maneuvers and the additional requirement for electrical power) are discussed. The performance of the Spartan Lite attitude control system in the presence of large disturbance torques is evaluated using the Trectops(Tm) dynamic simulator. This paper discusses the performance goals and resource constraints for candidate Spartan Lite propulsion systems and uses them to specify quantitative requirements against which the systems are evaluated.

  6. Visualization System Requirements for Data Processing Pipeline Design and Optimization.

    PubMed

    von Landesberger, Tatiana; Fellner, Dieter; Ruddle, Roy

    2016-08-25

    The rising quantity and complexity of data creates a need to design and optimize data processing pipelines - the set of data processing steps, parameters and algorithms that perform operations on the data. Visualization can support this process but, although there are many examples of systems for visual parameter analysis, there remains a need to systematically assess users' requirements and match those requirements to exemplar visualization methods. This article presents a new characterization of the requirements for pipeline design and optimization. This characterization is based on both a review of the literature and first-hand assessment of eight application case studies. We also match these requirements with exemplar functionality provided by existing visualization tools. Thus, we provide end-users and visualization developers with a way of identifying functionality that addresses data processing problems in an application. We also identify seven future challenges for visualization research that are not met by the capabilities of today's systems.

  7. Engineering Safety-Related Requirements for Software-Intensive Systems

    DTIC Science & Technology

    2006-03-01

    Climate Orbiter ($125 million) English vs. Metric units mismatch Mars Polar Lander Missing requirement concerning touchdown sensor behavior Therac – 25 ...Engineering Safety-Related Requirements for Software-Intensive Systems 25 Corresponding Safety Subfactors Safety SubfactorSafety Safety Problem Type Safety...station with the doors open for boarding, the horizontal gap between the station platform and the vehicle door threshold shall be no greater than 25 mm

  8. Space Transportation System Availability Requirements and Its Influencing Attributes Relationships

    NASA Technical Reports Server (NTRS)

    Rhodes, Russel E.; Adams, TImothy C.

    2008-01-01

    It is essential that management and engineering understand the need for an availability requirement for the customer's space transportation system as it enables the meeting of his needs, goal, and objectives. There are three types of availability, e.g., operational availability, achieved availability, or inherent availability. The basic definition of availability is equal to the mean uptime divided by the sum of the mean uptime plus the mean downtime. The major difference is the inclusiveness of the functions within the mean downtime and the mean uptime. This paper will address tIe inherent availability which only addresses the mean downtime as that mean time to repair or the time to determine the failed article, remove it, install a replacement article and verify the functionality of the repaired system. The definitions of operational availability include the replacement hardware supply or maintenance delays and other non-design factors in the mean downtime. Also with inherent availability the mean uptime will only consider the mean time between failures (other availability definitions consider this as mean time between maintenance - preventive and corrective maintenance) that requires the repair of the system to be functional. It is also essential that management and engineering understand all influencing attributes relationships to each other and to the resultant inherent availability requirement. This visibility will provide the decision makers with the understanding necessary to place constraints on the design definition for the major drivers that will determine the inherent availability, safety, reliability, maintainability, and the life cycle cost of the fielded system provided the customer. This inherent availability requirement may be driven by the need to use a multiple launch approach to placing humans on the moon or the desire to control the number of spare parts required to support long stays in either orbit or on the surface of the moon or mars. It is

  9. Requirements specification for nickel cadmium battery expert system

    NASA Technical Reports Server (NTRS)

    1986-01-01

    The requirements for performance, design, test, and qualification of a computer program identified as NICBES, Nickel Cadmium Battery Expert System, is established. The specific spacecraft power system configuration selected was the Hubble Space Telescope (HST) Electrical Power System (EPS) Testbed. Power for the HST comes from a system of 13 Solar Panel Arrays (SPAs) linked to 6 Nickel Cadmium Batteries which are connected to 3 Busses. An expert system, NICBES, will be developed at Martin Marietta Aerospace to recognize a testbed anomaly, identify the malfunctioning component and recommend a course of action. Besides fault diagnosis, NICBES will be able to evaluate battery status, give advice on battery status and provide decision support for the operator. These requirements are detailed.

  10. Information security requirements in patient-centred healthcare support systems.

    PubMed

    Alsalamah, Shada; Gray, W Alex; Hilton, Jeremy; Alsalamah, Hessah

    2013-01-01

    Enabling Patient-Centred (PC) care in modern healthcare requires the flow of medical information with the patient between different healthcare providers as they follow the patient's treatment plan. However, PC care threatens the stability of the balance of information security in the support systems since legacy systems fall short of attaining a security balance when sharing their information due to compromises made between its availability, integrity, and confidentiality. Results show that the main reason for this is that information security implementation in discrete legacy systems focused mainly on information confidentiality and integrity leaving availability a challenge in collaboration. Through an empirical study using domain analysis, observations, and interviews, this paper identifies a need for six information security requirements in legacy systems to cope with this situation in order to attain the security balance in systems supporting PC care implementation in modern healthcare.

  11. Software requirements definition Shipping Cask Analysis System (SCANS)

    SciTech Connect

    Johnson, G.L.; Serbin, R.

    1985-07-21

    The US Nuclear Regulatory Commission (NRC) staff reviews the technical adequacy of applications for certification of designs of shipping casks for spent nuclear fuel. In order to confirm an acceptable design, the NRC staff may perform independent calculations. The current NRC procedure for confirming cask design analyses is laborious and tedious. Most of the work is currently done by hand or through the use of a remote computer network. The time required to certify a cask can be long. The review process may vary somewhat with the engineer doing the reviewing. Similarly, the documentation on the results of the review can also vary with the reviewer. To increase the efficiency of this certification process, LLNL was requested to design and write an integrated set of user-oriented, interactive computer programs for a personal microcomputer. The system is known as the NRC Shipping Cask Analysis System (SCANS). The computer codes and the software system supporting these codes are being developed and maintained for the NRC by LLNL. The objective of this system is generally to lessen the time and effort needed to review an application. Additionally, an objective of the system is to assure standardized methods and documentation of the confirmatory analyses used in the review of these cask designs. A software system should be designed based on NRC-defined requirements contained in a requirements document. The requirements document is a statement of a project's wants and needs as the users and implementers jointly understand them. The requirements document states the desired end products (i.e. WHAT's) of the project, not HOW the project provides them. This document describes the wants and needs for the SCANS system. 1 fig., 3 tabs.

  12. Evolving Requirements for Magnetic Tape Data Storage Systems

    NASA Technical Reports Server (NTRS)

    Gniewek, John J.

    1996-01-01

    Magnetic tape data storage systems have evolved in an environment where the major applications have been back-up/restore, disaster recovery, and long term archive. Coincident with the rapidly improving price-performance of disk storage systems, the prime requirements for tape storage systems have remained: (1) low cost per MB, (2) a data rate balanced to the remaining system components. Little emphasis was given to configuring the technology components to optimize retrieval of the stored data. Emerging new applications such as network attached high speed memory (HSM), and digital libraries, place additional emphasis and requirements on the retrieval of the stored data. It is therefore desirable to consider the system to be defined both by STorage And Retrieval System (STARS) requirements. It is possible to provide comparative performance analysis of different STARS by incorporating parameters related to (1) device characteristics, and (2) application characteristics in combination with queuing theory analysis. Results of these analyses are presented here in the form of response time as a function of system configuration for two different types of devices and for a variety of applications.

  13. The HYDROS Mission: Requirements and Baseline System Design

    NASA Technical Reports Server (NTRS)

    Njoku, Eni; Spencer, Michael; McDonald, Kyle; Smith, Joel; Houser, Paul; Doiron, Terence; O'Neill, Peggy; Girard, Ralph; Entekhabi, Dara

    2003-01-01

    The HYDROS mission is under development by NASA as part of its Earth System Science Pathfinder (ESSP) program. HYDROS is designed to provide global maps of the Earth's soil moisture and freezel/thaw state every 2-3 days, for weather and climate prediction, water and carbon cycle studies, natural hazards monitoring, and national security applications. HYDROS uses a unique active and passive L-band microwave system that optimizes measurement accuracy, spatial resolution, and coverage. It provides measurements in nearly all weather conditions, regardless of solar illumination. The designs of the radar and radiometer electronics, antenna feedhorn and reflector, and science data system, are driven by specific mission and science objectives. These objectives impose requirements on the frequencies, polarizations, sampling, spatial resolution, and accuracy of the system. In this paper we describe the HYDROS mission requirements, baseline design, and measurement capabilities.

  14. NASA's Systems Engineering Approaches for Addressing Public Health Surveillance Requirements

    NASA Technical Reports Server (NTRS)

    Vann, Timi

    2003-01-01

    NASA's systems engineering has its heritage in space mission analysis and design, including the end-to-end approach to managing every facet of the extreme engineering required for successful space missions. NASA sensor technology, understanding of remote sensing, and knowledge of Earth system science, can be powerful new tools for improved disease surveillance and environmental public health tracking. NASA's systems engineering framework facilitates the match between facilitates the match between partner needs and decision support requirements in the areas of 1) Science/Data; 2) Technology; 3) Integration. Partnerships between NASA and other Federal agencies are diagrammed in this viewgraph presentation. NASA's role in these partnerships is to provide systemic and sustainable solutions that contribute to the measurable enhancement of a partner agency's disease surveillance efforts.

  15. System Modeling of Lunar Oxygen Production: Mass and Power Requirements

    NASA Technical Reports Server (NTRS)

    Steffen, Christopher J.; Freeh, Joshua E.; Linne, Diane L.; Faykus, Eric W.; Gallo, Christopher A.; Green, Robert D.

    2007-01-01

    A systems analysis tool for estimating the mass and power requirements for a lunar oxygen production facility is introduced. The individual modeling components involve the chemical processing and cryogenic storage subsystems needed to process a beneficiated regolith stream into liquid oxygen via ilmenite reduction. The power can be supplied from one of six different fission reactor-converter systems. A baseline system analysis, capable of producing 15 metric tons of oxygen per annum, is presented. The influence of reactor-converter choice was seen to have a small but measurable impact on the system configuration and performance. Finally, the mission concept of operations can have a substantial impact upon individual component size and power requirements.

  16. Systems Requirement Document for the MSRE U-233 Conversion System

    SciTech Connect

    Aigner, R.D.

    2001-01-11

    The fissile material reclamation activities for the MSRE remediation project include the removal and recovery of uranium from the off-gas system, from the stored fuel salt, and finally, from the uranium-laden charcoal in the Auxiliary Charcoal Bed (ACB). Each of these operations produces an uranium/fluoride compound that is not suitable for long-term storage. The uranium-fluoride compounds can be stored for a limited period of time in pressure vessels. The interim-storage vessels are designed to handle the internal pressure buildup from gases formed by radiolysis of the uranium-fluoride compounds. The conversion process will take the pressurized vessels from interim storage and process the materials in a hot cell located at Building 4501. The gas in the vessels will be vented through chemical traps and then the traps will be processed to convert the various uranium-fluoride compounds to a stable uranium oxide form. This will be done one trap at a time. The chemical form of uranium being extracted from the off-gas system and from fuel salt fluorination process is uranium hexafluoride UF{sub 6}. During the operations at MSRE, the UF{sub 6} is chemisorbed onto sodium fluoride (NaF) traps where it forms the complex, 2NaF{center_dot}UF{sub 6}. The conversion process that will be installed in the Building 4501 Hot Cell D will recover the UF{sub 6} from the NaF traps by decomposition of the binary complex at elevated temperatures (>300 C). After the uranium is extracted from the NaF traps, it is collected in the conversion process reaction vessel. The reaction vessel is then hydrolized and heated through several step operations up to 900 C in order to convert the material to a stable uranium oxide. The ACB at MSRE contains uranium-laden charcoal with unstable C{sub x}F compounds. After extraction at MSRE, this material will be delivered to Building 4501 Hot Cell D for processing to a stable oxide. The charcoal conversion process is still under development, with mockup and

  17. Automated Derivation of Complex System Constraints from User Requirements

    NASA Technical Reports Server (NTRS)

    Foshee, Mark; Murey, Kim; Marsh, Angela

    2010-01-01

    The Payload Operations Integration Center (POIC) located at the Marshall Space Flight Center has the responsibility of integrating US payload science requirements for the International Space Station (ISS). All payload operations must request ISS system resources so that the resource usage will be included in the ISS on-board execution timelines. The scheduling of resources and building of the timeline is performed using the Consolidated Planning System (CPS). The ISS resources are quite complex due to the large number of components that must be accounted for. The planners at the POIC simplify the process for Payload Developers (PD) by providing the PDs with a application that has the basic functionality PDs need as well as list of simplified resources in the User Requirements Collection (URC) application. The planners maintained a mapping of the URC resources to the CPS resources. The process of manually converting PD's science requirements from a simplified representation to a more complex CPS representation is a time-consuming and tedious process. The goal is to provide a software solution to allow the planners to build a mapping of the complex CPS constraints to the basic URC constraints and automatically convert the PD's requirements into systems requirements during export to CPS.

  18. Automated support requirement system user's guide for nondata entry personnel

    NASA Technical Reports Server (NTRS)

    Maryland, J. E., Jr.

    1985-01-01

    ASRS provides the capability to process intercenter/agency support requirements and commitments necessary for support of the Space Shuttle Launch and Landing, Flight, and Cargo operations. The instructions and commands that users will be allowed to utilize are presented. ASRS utilizes a data base stored on Honeywell DPS8 computer. ASRS programs are written in COBOL 74 utilizing the Honeywell DMIV-TP Processing System and the GCOS8 Operating System; they can also be accessed through Telenet or Datanet.

  19. Earth Sciences Requirements for the Information Sciences Experiment System

    NASA Technical Reports Server (NTRS)

    Bowker, David E. (Editor); Katzberg, Steve J. (Editor); Wilson, R. Gale (Editor)

    1990-01-01

    The purpose of the workshop was to further explore and define the earth sciences requirements for the Information Sciences Experiment System (ISES), a proposed onboard data processor with real-time communications capability intended to support the Earth Observing System (Eos). A review of representative Eos instrument types is given and a preliminary set of real-time data needs has been established. An executive summary is included.

  20. The effect of requirements prioritization on avionics system conceptual design

    NASA Astrophysics Data System (ADS)

    Lorentz, John

    This dissertation will provide a detailed approach and analysis of a new collaborative requirements prioritization methodology that has been used successfully on four Coast Guard avionics acquisition and development programs valued at $400M+. A statistical representation of participant study results will be discussed and analyzed in detail. Many technically compliant projects fail to deliver levels of performance and capability that the customer desires. Some of these systems completely meet "threshold" levels of performance; however, the distribution of resources in the process devoted to the development and management of the requirements does not always represent the voice of the customer. This is especially true for technically complex projects such as modern avionics systems. A simplified facilitated process for prioritization of system requirements will be described. The collaborative prioritization process, and resulting artifacts, aids the systems engineer during early conceptual design. All requirements are not the same in terms of customer priority. While there is a tendency to have many thresholds inside of a system design, there is usually a subset of requirements and system performance that is of the utmost importance to the design. These critical capabilities and critical levels of performance typically represent the reason the system is being built. The systems engineer needs processes to identify these critical capabilities, the associated desired levels of performance, and the risks associated with the specific requirements that define the critical capability. The facilitated prioritization exercise is designed to collaboratively draw out these critical capabilities and levels of performance so they can be emphasized in system design. Developing the purpose, scheduling and process for prioritization events are key elements of systems engineering and modern project management. The benefits of early collaborative prioritization flow throughout the

  1. Reliability analysis and initial requirements for FC systems and stacks

    NASA Astrophysics Data System (ADS)

    Åström, K.; Fontell, E.; Virtanen, S.

    In the year 2000 Wärtsilä Corporation started an R&D program to develop SOFC systems for CHP applications. The program aims to bring to the market highly efficient, clean and cost competitive fuel cell systems with rated power output in the range of 50-250 kW for distributed generation and marine applications. In the program Wärtsilä focuses on system integration and development. System reliability and availability are key issues determining the competitiveness of the SOFC technology. In Wärtsilä, methods have been implemented for analysing the system in respect to reliability and safety as well as for defining reliability requirements for system components. A fault tree representation is used as the basis for reliability prediction analysis. A dynamic simulation technique has been developed to allow for non-static properties in the fault tree logic modelling. Special emphasis has been placed on reliability analysis of the fuel cell stacks in the system. A method for assessing reliability and critical failure predictability requirements for fuel cell stacks in a system consisting of several stacks has been developed. The method is based on a qualitative model of the stack configuration where each stack can be in a functional, partially failed or critically failed state, each of the states having different failure rates and effects on the system behaviour. The main purpose of the method is to understand the effect of stack reliability, critical failure predictability and operating strategy on the system reliability and availability. An example configuration, consisting of 5 × 5 stacks (series of 5 sets of 5 parallel stacks) is analysed in respect to stack reliability requirements as a function of predictability of critical failures and Weibull shape factor of failure rate distributions.

  2. Fusing Quantitative Requirements Analysis with Model-based Systems Engineering

    NASA Technical Reports Server (NTRS)

    Cornford, Steven L.; Feather, Martin S.; Heron, Vance A.; Jenkins, J. Steven

    2006-01-01

    A vision is presented for fusing quantitative requirements analysis with model-based systems engineering. This vision draws upon and combines emergent themes in the engineering milieu. "Requirements engineering" provides means to explicitly represent requirements (both functional and non-functional) as constraints and preferences on acceptable solutions, and emphasizes early-lifecycle review, analysis and verification of design and development plans. "Design by shopping" emphasizes revealing the space of options available from which to choose (without presuming that all selection criteria have previously been elicited), and provides means to make understandable the range of choices and their ramifications. "Model-based engineering" emphasizes the goal of utilizing a formal representation of all aspects of system design, from development through operations, and provides powerful tool suites that support the practical application of these principles. A first step prototype towards this vision is described, embodying the key capabilities. Illustrations, implications, further challenges and opportunities are outlined.

  3. 14 CFR 171.319 - Approach elevation monitor system requirements.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Approach elevation monitor system requirements. 171.319 Section 171.319 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) NAVIGATIONAL FACILITIES NON-FEDERAL NAVIGATION FACILITIES Microwave Landing...

  4. 14 CFR 171.315 - Azimuth monitor system requirements.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Azimuth monitor system requirements. 171.315 Section 171.315 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) NAVIGATIONAL FACILITIES NON-FEDERAL NAVIGATION FACILITIES Microwave Landing...

  5. 46 CFR 151.20-5 - Cargo system valving requirements.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... meet the requirements listed below. Cargo tanks, whether gravity or pressure vessel type, for cargoes... tank is insulated) shall be provided with a valving system designated as Gravity-1. Cargo tanks, whether gravity or pressure vessel type, for cargoes which are carried below ambient temperature and...

  6. 46 CFR 151.20-5 - Cargo system valving requirements.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... meet the requirements listed below. Cargo tanks, whether gravity or pressure vessel type, for cargoes... tank is insulated) shall be provided with a valving system designated as Gravity-1. Cargo tanks, whether gravity or pressure vessel type, for cargoes which are carried below ambient temperature and...

  7. Topside facilities for floating production systems require new engineering thinking

    SciTech Connect

    Burn, A.J.; Graaf, G.

    1983-05-01

    Since the oil industry moved offshore, great emphasis has been placed on the need to reduce space and weight requirements of topside facilities. For successful design of floating production systems, weight consciousness assumes an even higher level of importance, necessitating systematic attention to detail even at the feasibility study stage of a project.

  8. 2 CFR 25.215 - Requirements for agency information systems.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 2 Grants and Agreements 1 2011-01-01 2011-01-01 false Requirements for agency information systems. 25.215 Section 25.215 Grants and Agreements Office of Management and Budget Guidance for Grants and Agreements OFFICE OF MANAGEMENT AND BUDGET GOVERNMENTWIDE GUIDANCE FOR GRANTS AND AGREEMENTS...

  9. 48 CFR 207.106 - Additional requirements for major systems.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Government surveillance of the process by which prime contractors consider such sources and determine whether... Government to use technical data to competitively reprocure identical items or components of the system if... mobilization requirements are insufficient to meet the agency's mobilization needs; or (3) The Government...

  10. 48 CFR 207.106 - Additional requirements for major systems.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Government surveillance of the process by which prime contractors consider such sources and determine whether... Government to use technical data to competitively reprocure identical items or components of the system if... mobilization requirements are insufficient to meet the agency's mobilization needs; or (3) The Government...

  11. Product Assurance Requirements Guide for Naval Ocean Systems Center Projects.

    DTIC Science & Technology

    1982-12-21

    individuals are certified as proficient in the required skills. Results of inspections, surveillance and quality adits shall be used as *Suitable for...or to drift towards a " rubber -stamp" type operation. These tendencies must be resisted. The impact of reliable components on life cycle cost, system

  12. 17 CFR 242.301 - Requirements for alternative trading systems.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... COMMISSION (CONTINUED) REGULATIONS M, SHO, ATS, AC, AND NMS AND CUSTOMER MARGIN REQUIREMENTS FOR SECURITY... inaccurate when filed. (v) The alternative trading system shall promptly file a cessation of operations... provided for in paragraphs (b)(2)(i) through (v) of this section must be filed with surveillance...

  13. 17 CFR 242.301 - Requirements for alternative trading systems.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... COMMISSION (CONTINUED) REGULATIONS M, SHO, ATS, AC, AND NMS AND CUSTOMER MARGIN REQUIREMENTS FOR SECURITY... inaccurate when filed. (v) The alternative trading system shall promptly file a cessation of operations... provided for in paragraphs (b)(2)(i) through (v) of this section must be filed with surveillance...

  14. 17 CFR 242.301 - Requirements for alternative trading systems.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... COMMISSION (CONTINUED) REGULATIONS M, SHO, ATS, AC, AND NMS AND CUSTOMER MARGIN REQUIREMENTS FOR SECURITY... inaccurate when filed. (v) The alternative trading system shall promptly file a cessation of operations... provided for in paragraphs (b)(2)(i) through (v) of this section must be filed with surveillance...

  15. 17 CFR 242.301 - Requirements for alternative trading systems.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... COMMISSION (CONTINUED) REGULATIONS M, SHO, ATS, AC, AND NMS AND CUSTOMER MARGIN REQUIREMENTS FOR SECURITY... inaccurate when filed. (v) The alternative trading system shall promptly file a cessation of operations... provided for in paragraphs (b)(2)(i) through (v) of this section must be filed with surveillance...

  16. 17 CFR 242.301 - Requirements for alternative trading systems.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... COMMISSION (CONTINUED) REGULATIONS M, SHO, ATS, AC, AND NMS AND CUSTOMER MARGIN REQUIREMENTS FOR SECURITY... inaccurate when filed. (v) The alternative trading system shall promptly file a cessation of operations... provided for in paragraphs (b)(2)(i) through (v) of this section must be filed with surveillance...

  17. 47 CFR 73.6024 - Transmission standards and system requirements.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 4 2010-10-01 2010-10-01 false Transmission standards and system requirements. 73.6024 Section 73.6024 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast Stations § 73.6024...

  18. 47 CFR 73.6024 - Transmission standards and system requirements.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 4 2011-10-01 2011-10-01 false Transmission standards and system requirements. 73.6024 Section 73.6024 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast Stations § 73.6024...

  19. 47 CFR 73.6024 - Transmission standards and system requirements.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 4 2013-10-01 2013-10-01 false Transmission standards and system requirements. 73.6024 Section 73.6024 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast Stations § 73.6024...

  20. 47 CFR 73.6024 - Transmission standards and system requirements.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 4 2012-10-01 2012-10-01 false Transmission standards and system requirements. 73.6024 Section 73.6024 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast Stations § 73.6024...

  1. 47 CFR 73.6024 - Transmission standards and system requirements.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 4 2014-10-01 2014-10-01 false Transmission standards and system requirements. 73.6024 Section 73.6024 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast Stations § 73.6024...

  2. Research Perspectives for Material Requirements Planning Systems. Paper No. 434.

    ERIC Educational Resources Information Center

    Berry, W. L.; Whybark, D. Clay

    Material requirements planning (MRP) systems are described as management tools for planning and controlling production operations. A wide variety of industries and production organizations are credited as reporting significant operating improvements in such areas as inventory control, production scheduling, delivery performance, and production…

  3. 50 CFR 660.14 - Vessel Monitoring System (VMS) requirements.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 50 Wildlife and Fisheries 13 2014-10-01 2014-10-01 false Vessel Monitoring System (VMS) requirements. 660.14 Section 660.14 Wildlife and Fisheries FISHERY CONSERVATION AND MANAGEMENT, NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION, DEPARTMENT OF COMMERCE (CONTINUED) FISHERIES OFF WEST COAST...

  4. Energy resource requirements of a solar heating system

    NASA Astrophysics Data System (ADS)

    Rogers, D. W. O.

    1980-01-01

    The paper addresses the question of the total energy resource use of a solar hot water and space heating system compared to the traditional oil, gas and electric heating options. The methods of energy analysis have been applied to a liquid-based, short-term storage solar space and water heating system for a dwelling in Toronto, and the results indicate that the indirect use of energy resources does not have a major impact on the overall energy conservation characteristics of the system which, being in many respects a worst case, takes 1.0-3.5 years of operation to conserve the energy resources, required to build, operate and maintain the system. Over the assumed 20-year lifetime the solar heating system, sized to provide 50% of the heating requirement to a house, uses between 53 and 62% as many energy resources as a conventional system, heating the same house. The energy-conservation characteristics of the system can be completely negated by the use of thermally generated electricity as backup in a 50% solar heating system which replaces oil or gas heating. The collectors and annual operating energy for the pumps were found to be the two most significant factors in the analysis.

  5. Interface requirements in nuclear medicine devices and systems

    SciTech Connect

    Maguire, G.Q. Jr.; Brill, A.B.; Noz, M.E.

    1982-01-01

    Interface designs for three nuclear medicine imaging systems, and computer networking strategies proposed for medical imaging departments are presented. Configurations for two positron-emission-tomography devices (PET III and ECAT) and a general-purpose tomography instrument (the UNICON) are analyzed in terms of specific performance parameters. Interface designs for these machines are contrasted in terms of utilization of standard versus custom modules, cost, and ease of modification, upgrade, and support. The requirements of general purpose systems for medical image analysis, display, and archiving, are considered, and a realizable state-of-the-art system is specfied, including a suggested timetable.

  6. Formal Requirements-Based Programming for Complex Systems

    NASA Technical Reports Server (NTRS)

    Rash, James L.; Hinchey, Michael G.; Rouff, Christopher A.; Gracanin, Denis

    2005-01-01

    Computer science as a field has not yet produced a general method to mechanically transform complex computer system requirements into a provably equivalent implementation. Such a method would be one major step towards dealing with complexity in computing, yet it remains the elusive holy grail of system development. Currently available tools and methods that start with a formal model of a system and mechanically produce a provably equivalent implementation are valuable but not sufficient. The gap that such tools and methods leave unfilled is that the formal models cannot be proven to be equivalent to the system requirements as originated by the customer For the classes of complex systems whose behavior can be described as a finite (but significant) set of scenarios, we offer a method for mechanically transforming requirements (expressed in restricted natural language, or appropriate graphical notations) into a provably equivalent formal model that can be used as the basis for code generation and other transformations. While other techniques are available, this method is unique in offering full mathematical tractability while using notations and techniques that are well known and well trusted. We illustrate the application of the method to an example procedure from the Hubble Robotic Servicing Mission currently under study and preliminary formulation at NASA Goddard Space Flight Center.

  7. Minimum Control Requirements for Advanced Life Support Systems

    NASA Technical Reports Server (NTRS)

    Boulange, Richard; Jones, Harry; Jones, Harry

    2002-01-01

    Advanced control technologies are not necessary for the safe, reliable and continuous operation of Advanced Life Support (ALS) systems. ALS systems can and are adequately controlled by simple, reliable, low-level methodologies and algorithms. The automation provided by advanced control technologies is claimed to decrease system mass and necessary crew time by reducing buffer size and minimizing crew involvement. In truth, these approaches increase control system complexity without clearly demonstrating an increase in reliability across the ALS system. Unless these systems are as reliable as the hardware they control, there is no savings to be had. A baseline ALS system is presented with the minimal control system required for its continuous safe reliable operation. This baseline control system uses simple algorithms and scheduling methodologies and relies on human intervention only in the event of failure of the redundant backup equipment. This ALS system architecture is designed for reliable operation, with minimal components and minimal control system complexity. The fundamental design precept followed is "If it isn't there, it can't fail".

  8. Models of Human Information Requirements: "When Reasonable Aiding Systems Disagree"

    NASA Technical Reports Server (NTRS)

    Corker, Kevin; Pisanich, Gregory; Shafto, Michael (Technical Monitor)

    1994-01-01

    Aircraft flight management and Air Traffic Control (ATC) automation are under development to maximize the economy of flight and to increase the capacity of the terminal area airspace while maintaining levels of flight safety equal to or better than current system performance. These goals are being realized by the introduction of flight management automation aiding and operations support systems on the flight deck and by new developments of ATC aiding systems that seek to optimize scheduling of aircraft while potentially reducing required separation and accounting for weather and wake vortex turbulence. Aiding systems on both the flight deck and the ground operate through algorithmic functions on models of the aircraft and of the airspace. These models may differ from each other as a result of variations in their models of the immediate environment. The resultant flight operations or ATC commands may differ in their response requirements (e.g. different preferred descent speeds or descent initiation points). The human operators in the system must then interact with the automation to reconcile differences and resolve conflicts. We have developed a model of human performance including cognitive functions (decision-making, rule-based reasoning, procedural interruption recovery and forgetting) that supports analysis of the information requirements for resolution of flight aiding and ATC conflicts. The model represents multiple individuals in the flight crew and in ATC. The model is supported in simulation on a Silicon Graphics' workstation using Allegro Lisp. Design guidelines for aviation automation aiding systems have been developed using the model's specification of information and team procedural requirements. Empirical data on flight deck operations from full-mission flight simulation are provided to support the model's predictions. The paper describes the model, its development and implementation, the simulation test of the model predictions, and the empirical

  9. An onboard navigation system which fulfills Mars aerocapture guidance requirements

    NASA Technical Reports Server (NTRS)

    Brand, Timothy J.; Fuhry, Douglas P.; Shepperd, Stanley W.

    1989-01-01

    The development of a candidate autonomous onboard Mars approach navigation scheme capable of supporting aerocapture into Mars orbit is discussed. An aerocapture guidance and navigation system which can run independently of the preaerocapture navigation was used to define a preliminary set of accuracy requirements at entry interface. These requirements are used to evaluate the proposed preaerocapture navigation scheme. This scheme uses optical sightings on Deimos with a star tracker and an inertial measurement unit for instrumentation as a source for navigation nformation. Preliminary results suggest that the approach will adequately support aerocaputre into Mars orbit.

  10. Rationale for windshield glass system specification requirements for shuttle orbiter

    NASA Technical Reports Server (NTRS)

    Hayashida, K.; King, G. L.; Tesinsiky, J.; Wittenburg, D. R.

    1972-01-01

    A preliminary procurement specification for the space shuttle orbiter windshield pane, and some of the design considerations and rationale leading to its development are presented. The windshield designer is given the necessary methods and procedures for assuring glass pane structural integrity by proof test. These methods and procedures are fully developed for annealed and thermally tempered aluminosilicate, borosilicate, and soda lime glass and for annealed fused silica. Application of the method to chemically tempered glass is considered. Other considerations are vision requirements, protection against bird impact, hail, frost, rain, and meteoroids. The functional requirements of the windshield system during landing, ferrying, boost, space flight, and entry are included.

  11. Latency in Visionic Systems: Test Methods and Requirements

    NASA Technical Reports Server (NTRS)

    Bailey, Randall E.; Arthur, J. J., III; Williams, Steven P.; Kramer, Lynda J.

    2005-01-01

    A visionics device creates a pictorial representation of the external scene for the pilot. The ultimate objective of these systems may be to electronically generate a form of Visual Meteorological Conditions (VMC) to eliminate weather or time-of-day as an operational constraint and provide enhancement over actual visual conditions where eye-limiting resolution may be a limiting factor. Empirical evidence has shown that the total system delays or latencies including the imaging sensors and display systems, can critically degrade their utility, usability, and acceptability. Definitions and measurement techniques are offered herein as common test and evaluation methods for latency testing in visionics device applications. Based upon available data, very different latency requirements are indicated based upon the piloting task, the role in which the visionics device is used in this task, and the characteristics of the visionics cockpit display device including its resolution, field-of-regard, and field-of-view. The least stringent latency requirements will involve Head-Up Display (HUD) applications, where the visionics imagery provides situational information as a supplement to symbology guidance and command information. Conversely, the visionics system latency requirement for a large field-of-view Head-Worn Display application, providing a Virtual-VMC capability from which the pilot will derive visual guidance, will be the most stringent, having a value as low as 20 msec.

  12. Nuclear Thermal Propulsion Mars Mission Systems Analysis and Requirements Definition

    NASA Technical Reports Server (NTRS)

    Mulqueen, Jack; Chiroux, Robert C.; Thomas, Dan; Crane, Tracie

    2007-01-01

    This paper describes the Mars transportation vehicle design concepts developed by the Marshall Space Flight Center (MSFC) Advanced Concepts Office. These vehicle design concepts provide an indication of the most demanding and least demanding potential requirements for nuclear thermal propulsion systems for human Mars exploration missions from years 2025 to 2035. Vehicle concept options vary from large "all-up" vehicle configurations that would transport all of the elements for a Mars mission on one vehicle. to "split" mission vehicle configurations that would consist of separate smaller vehicles that would transport cargo elements and human crew elements to Mars separately. Parametric trades and sensitivity studies show NTP stage and engine design options that provide the best balanced set of metrics based on safety, reliability, performance, cost and mission objectives. Trade studies include the sensitivity of vehicle performance to nuclear engine characteristics such as thrust, specific impulse and nuclear reactor type. Tbe associated system requirements are aligned with the NASA Exploration Systems Mission Directorate (ESMD) Reference Mars mission as described in the Explorations Systems Architecture Study (ESAS) report. The focused trade studies include a detailed analysis of nuclear engine radiation shield requirements for human missions and analysis of nuclear thermal engine design options for the ESAS reference mission.

  13. Establishing functional requirements for emergency management information systems

    SciTech Connect

    Reed, J.H.; Rogers, G.O.; Sorensen, J.H.

    1991-01-01

    The advancement of computer technologies has led to the development of a number of emergency management information systems (e.g., EIS, CAMEO, IEMIS). The design of these systems has tended to be technologically driven rather than oriented to meeting information management needs during an emergency. Of course, emergency management needs vary depending on the characteristics of the emergency. For example, in hurricanes, onset is typically slow enough to allow emergency managers to simulate evacuations dynamically while in chemical disasters onset may be sufficiently rapid to preclude such simulation(s). This paper describes a system design process in which the analysis of widely recognized emergency management functions was used to identify information requirements and the requisite software and hardware capabilities to deal with rapid onset, low probability, high consequence events. These requirements were then implemented as a prototype emergency management system using existing hardware and software to assure feasibility. Data, hardware, and software requirements were further developed, refined, and made more concrete through an iterative prototyping effort. This approach focuses attention directly on meeting emergency management information needs while avoiding unneeded technological innovations. 10 refs., 4 figs., 1 tab.

  14. Avionic architecture requirements for Space Exploration Initiative systems

    NASA Technical Reports Server (NTRS)

    Herbella, C. G.; Brown, D. C.

    1991-01-01

    The authors discuss NASA's Strategic Avionics Technology Working Group (SATWG) and the results of the first study commissioned by the SATWG, the Space Avionics Requirements Study (SARS). The goal of the SARS task was to show that an open avionics architecture, using modular, standardized components, could be applied across the wide range of systems that comprise the Space Exploration Initiative. The study addressed systems ranging from expendable launch vehicles and the space station to surface systems such as Mars or lunar rovers and habitats. Top-level avionics requirements were derived from characterizations of each of the systems considered. Then a set of avionics subsystems were identified, along with estimates of the numbers and types of modules needed to meet the requirements. Applicability of these results across the infrastructure was then illustrated. In addition to these tasks, critical technologies were identified, characterized, and assessed in terms of their criticality and impact on the program. Design, development, test, and evaluation methods were addressed to identify potential areas of improvement.

  15. NGSI: FUNCTION REQUIREMENTS FOR A CYLINDER TRACKING SYSTEM

    SciTech Connect

    Branney, S.

    2012-06-06

    While nuclear suppliers currently track uranium hexafluoride (UF{sub 6}) cylinders in various ways, for their own purposes, industry practices vary significantly. The NNSA Office of Nonproliferation and International Security's Next Generation Safeguards Initiative (NGSI) has begun a 5-year program to investigate the concept of a global monitoring scheme that uniquely identifies and tracks UF{sub 6} cylinders. As part of this effort, NGSI's multi-laboratory team has documented the 'life of a UF{sub 6} cylinder' and reviewed IAEA practices related to UF{sub 6} cylinders. Based on this foundation, this paper examines the functional requirements of a system that would uniquely identify and track UF{sub 6} cylinders. There are many considerations for establishing a potential tracking system. Some of these factors include the environmental conditions a cylinder may be expected to be exposed to, where cylinders may be particularly vulnerable to diversion, how such a system may be integrated into the existing flow of commerce, how proprietary data generated in the process may be protected, what a system may require in terms of the existing standard for UF{sub 6} cylinder manufacture or modifications to it and what the limiting technology factors may be. It is desirable that a tracking system should provide benefit to industry while imposing as few additional constraints as possible and still meeting IAEA safeguards objectives. This paper includes recommendations for this system and the analysis that generated them.

  16. Microgravity fluid management requirements of advanced solar dynamic power systems

    NASA Technical Reports Server (NTRS)

    Migra, Robert P.

    1987-01-01

    The advanced solar dynamic system (ASDS) program is aimed at developing the technology for highly efficient, lightweight space power systems. The approach is to evaluate Stirling, Brayton and liquid metal Rankine power conversion systems (PCS) over the temperature range of 1025 to 1400K, identify the critical technologies and develop these technologies. Microgravity fluid management technology is required in several areas of this program, namely, thermal energy storage (TES), heat pipe applications and liquid metal, two phase flow Rankine systems. Utilization of the heat of fusion of phase change materials offers potential for smaller, lighter TES systems. The candidate TES materials exhibit large volume change with the phase change. The heat pipe is an energy dense heat transfer device. A high temperature application may transfer heat from the solar receiver to the PCS working fluid and/or TES. A low temperature application may transfer waste heat from the PCS to the radiator. The liquid metal Rankine PCS requires management of the boiling/condensing process typical of two phase flow systems.

  17. Future planetary missions potentially requiring Radioisotope Power Systems

    NASA Astrophysics Data System (ADS)

    Mondt, Jack F.; Nesmith, Bill J.

    2000-01-01

    This paper summarizes the potential Radioisotope Power System, (RPS), technology requirements for future missions being planned for NASA's Solar System Exploration (SSE) theme. Many missions to the outer planets (Jupiter and beyond) require completion of the work on advanced radioisotope power systems (ARPS) now underway in NASA's Deep Space Systems Technology Program. The power levels for the ARPS can be divided into four classes. Forty to one hundred milliwatt-class provides both thermal and electric power for small in situ science laboratories on the surface of bodies in the solar system. One to two watt class for surface and aerobot science laboratories. Ten to twenty-watt class for micro satellites in orbit, surface science stations and aerobots. One hundred to two hundred watt class for orbiter science spacecraft, for drilling core samples, for powering subsurface hydrobots and cryobots on accessible bodies and for data handling and communicating data from small orbiters, surface laboratories, aerobots and hydrobots back to Earth. Using the most optimistic solar-based power system instead of advanced RPSs pushes the launch masses of these missions beyond the capability of affordable launch vehicles. Advanced RPS is also favored over solar power for obtaining comet samples on extended-duration missions. .

  18. SWEPP assay system version 2.0 software requirements specification

    SciTech Connect

    Matthews, S.D.; East, L.V.; Marwil, E.S.; Ferguson, J.J.

    1996-06-01

    The INEL Stored Waste Examination Pilot Plant (SWEPP) operations staff use nondestructive analysis methods to characterize the radiological contents of contact-handled radioactive waste containers. Containers of waste from Rocky Flats Environmental Technology Site and other DOE sites are currently stored at SWEPP. Before these containers can be shipped to WIPP, SWEPP must verify compliance with storage, shipping, and disposal requirements. One part of the SWEPP program measures neutron emissions from the containers and estimates the mass of Pu and other transuranic isotopes present. The code NEUT2 was originally used to perform data acquisition and reduction; the SWEPP Assay System (SAS) code replaced NEUT2 in early 1994. This document specifies the requirements for the SAS software as installed at INEL and was written to comply with RWMC (INEL Radioactive Waste Management Complex) quality requirements.

  19. HLLV avionics requirements study and electronic filing system database development

    NASA Technical Reports Server (NTRS)

    1994-01-01

    This final report provides a summary of achievements and activities performed under Contract NAS8-39215. The contract's objective was to explore a new way of delivering, storing, accessing, and archiving study products and information and to define top level system requirements for Heavy Lift Launch Vehicle (HLLV) avionics that incorporate Vehicle Health Management (VHM). This report includes technical objectives, methods, assumptions, recommendations, sample data, and issues as specified by DPD No. 772, DR-3. The report is organized into two major subsections, one specific to each of the two tasks defined in the Statement of Work: the Index Database Task and the HLLV Avionics Requirements Task. The Index Database Task resulted in the selection and modification of a commercial database software tool to contain the data developed during the HLLV Avionics Requirements Task. All summary information is addressed within each task's section.

  20. Current cost and performance requirements for residential cool storage systems

    SciTech Connect

    Brown, D.R.; Spanner, G.E.

    1988-08-01

    This study defines the current cost and performance requirements for residential cool storage technologies based on the characteristics of conventional air conditioning equipment and residential time-of-day (TOD) rate structures existing during the 1986--1987 time frame. Currently, rate structures are changing rapidly. Given the volatility of rate structures, the establishment of cost goal is challenging. The goals presented in this study are based on the utility rate structure as of 1986. This study serves to define residential cool storage cost and performance requirements in the current economic environment as well as the many issues affecting the requirements for residential cool storage systems both now and in the future. The same methodology can be employed to establish long-run goals once future rate structures are adequately defined. 12 refs., 6 figs., 18 tabs.

  1. Validating Requirements for Fault Tolerant Systems Using Model Checking

    NASA Technical Reports Server (NTRS)

    Schneider, Francis; Easterbrook, Steve M.; Callahan, John R.; Holzmann, Gerard J.

    1997-01-01

    Model checking is shown to be an effective tool in validating the behavior of a fault tolerant embedded spacecraft controller. The case study presented here shows that by judiciously abstracting away extraneous complexity, the state space of the model could be exhaustively searched allowing critical functional requirements to be validated down to the design level. Abstracting away detail not germane to the problem of interest leaves by definition a partial specification behind. The success of this procedure shows that it is feasible to effectively validate a partial specification with this technique. Three anomalies were found in the system one of which is an error in the detailed requirements, and the other two are missing/ambiguous requirements. Because the method allows validation of partial specifications, it also is an effective methodology towards maintaining fidelity between a co-evolving specification and an implementation.

  2. Integrated Station Executive requirements and systems design approach

    NASA Technical Reports Server (NTRS)

    Berger, Eugene L.; Morris, C. Doug

    1992-01-01

    The Avionics Office of the Space Station Projects Office at Johnson Space Center (JSC) is working to define and integrate end-to-end requirements for the Space Station Freedom Program (SSFP) space-ground operations. As part of these efforts, the project office has had the MITRE Corporation perform assessments and analyses in areas where they had particular concern. These areas include the changing concepts for test methodologies, the operation and performance of the communication protocols, end-to-end network management, and the Master Objects Data Base (MODB). Since the recent restructure of the space station design, a new software application, the Integrated Station Executive (ISE), has been established. This application is to act as an executive agent along with the crew and ground controllers, while replacing (or absorbing) many of the system management functions that required a home when distributed element management was eliminated. This document summarizes the current state of the ISE requirements and assesses the characteristics of the current design. MITRE's goals in this assessment and analysis is twofold: first, identify any internal inconsistencies in either the requirements or in the current design; and second, to examine the applicability of the Open System Interconnection (OSI) management standards. Inasmuch as the ISE has been defined as the executive or operations manager application within the integrated avionics of the space station, special attention is given to adapting OSI management for the specification of the ISE functions.

  3. Unmanned Aircraft System Control and ATC Communications Bandwidth Requirements

    NASA Technical Reports Server (NTRS)

    Henriksen, Steve

    2008-01-01

    There are significant activities taking place to establish the procedures and requirements for safe and routine operation of unmanned aircraft systems (UAS) in the National Airspace System (NAS). Among the barriers to overcome in achieving this goal is the lack of sufficient frequency spectrum necessary for the UAS control and air traffic control (ATC) communications links. This shortcoming is compounded by the fact that the UAS control communications links will likely be required to operate in protected frequency spectrum, just as ATC communications links are, because they relate to "safety and regularity of flight." To support future International Telecommunications Union (ITU) World Radio Conference (WRC) agenda items concerning new frequency allocations for UAS communications links, and to augment the Future Communications Study (FCS) Technology Evaluation Group efforts, NASA Glenn Research Center has sponsored a task to estimate the UAS control and ATC communications bandwidth requirements for safe, reliable, and routine operation of UAS in the NAS. This report describes the process and results of that task. The study focused on long-term bandwidth requirements for UAS approximately through 2030.

  4. A Methodology for Systems Requirements Specification and Traceability for Large Real Time Complex Systems

    DTIC Science & Technology

    1991-09-27

    The ECS block is divided into four projects : Systems Design Synthesis Technology, Systems Evaluation and Assessment Technology, Systems Reengineering...Technology, and Engineering Application Prototype. These projects work closely together to incorporate new technology across the entire system...development life cycle. The Requirements Specification and Traceability Task is within the Systems Design Synthesis Technology Project . The project looks at

  5. Ground Systems Development Environment (GSDE) interface requirements analysis: Operations scenarios

    NASA Technical Reports Server (NTRS)

    Church, Victor E.; Phillips, John

    1991-01-01

    This report is a preliminary assessment of the functional and data interface requirements to the link between the GSDE GS/SPF (Amdahl) and the Space Station Control Center (SSCC) and Space Station Training Facility (SSTF) Integration, Verification, and Test Environments (IVTE's). These interfaces will be involved in ground software development of both the control center and the simulation and training systems. Our understanding of the configuration management (CM) interface and the expected functional characteristics of the Amdahl-IVTE interface is described. A set of assumptions and questions that need to be considered and resolved in order to complete the interface functional and data requirements definitions are presented. A listing of information items defined to describe software configuration items in the GSDE CM system is included. It also includes listings of standard reports of CM information and of CM-related tools in the GSDE.

  6. Defining Requirements for an Integrated Water Resource Modeling System

    SciTech Connect

    Thurman, David A.; Peterson, Todd S.; Frodge, Jonathan

    2002-07-29

    This paper describes the process used to define the requirements for an integrated water resource modeling system that will be employed by a range of users with varying backgrounds and needs. A five-step process was initiated to ensure consideration of the needs and interests of users representing many different parts of the organization. The steps of the process, the results of each step and a summary of the results are presented.

  7. Defense Information Systems Program Automated CORDIVEM Design Requirements,

    DTIC Science & Technology

    1984-02-28

    data by providing a clear audit trail of how and why decisions were made as a function of the C2 system performance. Further, the careful and...environmental resolution must be made with great care because it dramatically influences the resolution of most combat effects and determines to a large...other items, however, this analysis demonstrates the potential model definition problem unless careful attention is given to the user requirements and

  8. System requirements for laser power beaming to geosynchronous satellites

    SciTech Connect

    Neal, R.D.; McKechnie, T.S.; Neal, D.R.

    1994-03-01

    Geosynchronous satellites use solar arrays as their primary source of electrical power. During earth eclipse, which occurs 90 times each year, the satellites are powered by batteries, but the heavy charge-discharge cycle decreases their life expectancy. By beaming laser power to satellites during the eclipses, satellite life expectancy can be significantly increased. In this paper, the authors investigate the basic system parameters and trade-offs of using reactor pumped laser technology to beam power from the Nevada Test Site. A first order argument is used to develop a consistent set of requirements for such a system.

  9. Performance requirements of automotive batteries for future car electrical systems

    NASA Astrophysics Data System (ADS)

    Friedrich, R.; Richter, G.

    The further increase in the number of power-consuming functions which has been announced for future vehicle electrical systems, and in particular the effects of new starting systems on battery performance, requires a further optimization of the lead acid system coupled with effective energy management, and enhanced battery operating conditions. In the face of these increased requirements, there are proven benefits to splitting the functions of a single SLI battery between two separate, special-purpose batteries, each of which are optimized, for high power output and for high energy throughput, respectively. This will bring about a marked improvement in weight, reliability, and state of charge (SOC). The development of special design starter and service batteries is almost completed and will lead to new products with a high standard of reliability. The design of the power-optimized lead acid accumulator is particularly suitable for further development as the battery for a 42/36 V electrical system. This is intended to improve the efficiency of the generator and the various power-consuming functions and to improve start/stop operation thereby bringing about a marked reduction in the fuel consumption of passenger cars. This improvement can also be assisted by a charge management system used in conjunction with battery status monitoring.

  10. Architectural requirements for the Red Storm computing system.

    SciTech Connect

    Camp, William J.; Tomkins, James Lee

    2003-10-01

    This report is based on the Statement of Work (SOW) describing the various requirements for delivering 3 new supercomputer system to Sandia National Laboratories (Sandia) as part of the Department of Energy's (DOE) Accelerated Strategic Computing Initiative (ASCI) program. This system is named Red Storm and will be a distributed memory, massively parallel processor (MPP) machine built primarily out of commodity parts. The requirements presented here distill extensive architectural and design experience accumulated over a decade and a half of research, development and production operation of similar machines at Sandia. Red Storm will have an unusually high bandwidth, low latency interconnect, specially designed hardware and software reliability features, a light weight kernel compute node operating system and the ability to rapidly switch major sections of the machine between classified and unclassified computing environments. Particular attention has been paid to architectural balance in the design of Red Storm, and it is therefore expected to achieve an atypically high fraction of its peak speed of 41 TeraOPS on real scientific computing applications. In addition, Red Storm is designed to be upgradeable to many times this initial peak capability while still retaining appropriate balance in key design dimensions. Installation of the Red Storm computer system at Sandia's New Mexico site is planned for 2004, and it is expected that the system will be operated for a minimum of five years following installation.

  11. Power system requirements and selection for the space exploration initiative

    SciTech Connect

    Biringer, K.L. ); Bartine, D.E. ); Buden, D. ); Foreman, J. ); Harrison, S. )

    1991-01-01

    The Space Exploration Initiative (SEI) seeks to reestablish a US program of manned and unmanned space exploration. The President has called for a program which includes a space station element, a manned habitation of the moon, and a human exploration of Mars. The NASA Synthesis Group has developed four significantly different architectures for the SEI program. One key element of a space exploration effort is the power required to support the missions. The Power Speciality Team of the Synthesis Group was tasked with assessing and evaluating the power requirements and candidate power technologies for such missions. Inputs to the effort came from existing NASA studies as well as other governments agency inputs such as those from DOD and DOE. In addition, there were industry and university briefings and results of solicitations from the AIAA and the general public as part of the NASA outreach effort. Because of the variety of power needs in the SEI program, there will be a need for multiple power system technologies including solar, nuclear and electrochemical. Due to the high rocket masses required to propel payloads to the moon and beyond to Mars, there is great emphasis placed on the need for high power density and high energy density systems. Power system technology development work is needed results will determine the ultimate technology selections. 23 refs., 10 figs.

  12. Requirements and applications for robotic servicing of military space systems

    NASA Technical Reports Server (NTRS)

    Ledford, Otto C., Jr.; Bennett, Rodney G.

    1992-01-01

    The utility of on-orbit servicing of spacecraft has been demonstrated by NASA several times using shuttle-based astronaut EVA. There has been interest in utilizing on-orbit servicing for military space systems as well. This interest has been driven by the increasing reliance of all branches of the military upon space-based assets, the growing numbers, complexity, and cost of those assets, and a desire to normalize support policies for space-based operations. Many military satellites are placed in orbits which are unduly hostile for astronaut operations and/or cannot be reached by the shuttle. In addition, some of the projected tasks may involve hazardous operations. This has led to a focus on robotic systems, instead of astronauts, for the basis of projected servicing systems. This paper describes studies and activities which will hopefully lead to on-orbit servicing being one of the tools available to military space systems designers and operators. The utility of various forms of servicing has been evaluated for present and projected systems, critical technologies have been identified, and strategies for the development and insertion of this technology into operational systems have been developed. Many of the projected plans have been adversely affected by budgetary restrictions and evolving architectures, but the fundamental benefits and requirements are well understood. A method of introducing servicing capabilities in a manner which has a low impact on the system designer and does not require the prior development of an expensive infrastructure is discussed. This can potentially lead to an evolutionary implementation of the full technology.

  13. Electric Bike Sharing--System Requirements and Operational Concepts

    SciTech Connect

    Cherry, Christopher; Worley, Stacy; Jordan, David

    2010-08-01

    Bike sharing is an exciting new model of public-private transportation provision that has quickly emerged in the past five years. Technological advances have overcome hurdles of early systems and cities throughout the globe are adopting this model of transportation service. Electric bikes have simultaneously gained popularity in many regions of the world and some have suggested that shared electric bikes could provide an even higher level of service compared to existing systems. There are several challenges that are unique to shared electric bikes: electric-assisted range, recharging protocol, and bike and battery checkout procedures. This paper outlines system requirements to successfully develop and deploy an electric bike sharing system, focusing on system architecture, operational concepts, and battery management. Although there is little empirical evidence, electric bike sharing could be feasible, depending on demand and battery management, and can potentially improve the utility of existing bike sharing systems. Under most documented bike sharing use scenarios, electric bike battery capacity is insufficient for a full day of operation, depending on recharging protocol. Off-board battery management is a promising solution to address this problem. Off-board battery management can also support solar recharging. Future pilot tests will be important and allow empirical evaluation of electric bikesharing system performance. (auth)

  14. Onboard shuttle on-line software requirements system: Prototype

    NASA Technical Reports Server (NTRS)

    Kolkhorst, Barbara; Ogletree, Barry

    1989-01-01

    The prototype discussed here was developed as proof of a concept for a system which could support high volumes of requirements documents with integrated text and graphics; the solution proposed here could be extended to other projects whose goal is to place paper documents in an electronic system for viewing and printing purposes. The technical problems (such as conversion of documentation between word processors, management of a variety of graphics file formats, and difficulties involved in scanning integrated text and graphics) would be very similar for other systems of this type. Indeed, technological advances in areas such as scanning hardware and software and display terminals insure that some of the problems encountered here will be solved in the near-term (less than five years). Examples of these solvable problems include automated input of integrated text and graphics, errors in the recognition process, and the loss of image information which results from the digitization process. The solution developed for the Online Software Requirements System is modular and allows hardware and software components to be upgraded or replaced as industry solutions mature. The extensive commercial software content allows the NASA customer to apply resources to solving the problem and maintaining documents.

  15. Job Management Requirements for NAS Parallel Systems and Clusters

    NASA Technical Reports Server (NTRS)

    Saphir, William; Tanner, Leigh Ann; Traversat, Bernard

    1995-01-01

    A job management system is a critical component of a production supercomputing environment, permitting oversubscribed resources to be shared fairly and efficiently. Job management systems that were originally designed for traditional vector supercomputers are not appropriate for the distributed-memory parallel supercomputers that are becoming increasingly important in the high performance computing industry. Newer job management systems offer new functionality but do not solve fundamental problems. We address some of the main issues in resource allocation and job scheduling we have encountered on two parallel computers - a 160-node IBM SP2 and a cluster of 20 high performance workstations located at the Numerical Aerodynamic Simulation facility. We describe the requirements for resource allocation and job management that are necessary to provide a production supercomputing environment on these machines, prioritizing according to difficulty and importance, and advocating a return to fundamental issues.

  16. Aerospace energy systems laboratory: Requirements and design approach

    NASA Technical Reports Server (NTRS)

    Glover, Richard D.

    1988-01-01

    The NASA Ames-Dryden Flight Research Facility at Edwards, California, operates a mixed fleet of research aircraft employing nickel-cadmium (NiCd) batteries in a variety of flight-critical applications. Dryden's Battery Systems Laboratory (BSL), a computerized facility for battery maintenance servicing, has developed over two decades into one of the most advanced facilities of its kind in the world. Recently a major BSL upgrade was initiated with the goal of modernization to provide flexibility in meeting the needs of future advanced projects. The new facility will be called the Aerospace Energy Systems Laboratory (AESL) and will employ distributed processing linked to a centralized data base. AESL will be both a multistation servicing facility and a research laboratory for the advancement of energy storage system maintenance techniques. This paper describes the baseline requirements for the AESL and the design approach being taken for its mechanization.

  17. Opportunistically discovering usability requirements for a clinical handover system.

    PubMed

    Kaufmann, David; Parry, David; Carlsen, Victoria; Carter, Philip; Parry, Emma; Westbrook, Lucy

    2013-01-01

    Clinical Handover in hospital is a process that can cause a major risk to patients, and be inefficient and time-consuming for staff. Software designed to support such processes needs to be used in a demanding and fast-moving environment. This work formulated Usability Design Requirements for such a handover software system. The requirements have been derived from a usability evaluation at Auckland City Hospital, where the handover was observed in two different environments during a handover improvement process. The requirements were produced using a multi-method, triangulated approach and they may be able to inform the design of systems to support clinical handover. The physical environment and the protocols adopted for handover were changed during this process, with software changes waiting for a larger project. Periods of change in work practice may be particularly favourable times to perform such studies, even if major software changes are not implemented. Staff engagement with the process may also be improved during times of change.

  18. An airline study of advanced technology requirements for advanced high speed commercial engines. 3: Propulsion system requirements

    NASA Technical Reports Server (NTRS)

    Sallee, G. P.

    1973-01-01

    The advanced technology requirements for an advanced high speed commercial transport engine are presented. The results of the phase 3 effort cover the requirements and objectives for future aircraft propulsion systems. These requirements reflect the results of the Task 1 and 2 efforts and serve as a baseline for future evaluations, specification development efforts, contract/purchase agreements, and operational plans for future subsonic commercial engines. This report is divided into five major sections: (1) management objectives for commercial propulsion systems, (2) performance requirements for commercial transport propulsion systems, (3) design criteria for future transport engines, (4) design requirements for powerplant packages, and (5) testing.

  19. Mirror Quality Required By The Antares Laser System

    NASA Astrophysics Data System (ADS)

    Sweatt, W. C.

    1980-11-01

    The Antares laser system is a large (100 kJ) CO2 pulse laser operating at 10.6 pm. The system has 72 beam lines, each with an aperture of 900 cm2. The system will be composed primarily of large copper-faced mirrors whose principal dimensions range up to 65 cm. These mirrors will be single-point diamond turned (SPDT) at the Y-12 facility of Union Carbide Corporation in Oak Ridge, Tennessee. We have had to develop surface quality specifications for these mirrors. These specifications were initially set at 50 nm peak-to-valley (p-v) surface error for the microsurface over 0.5-mm areas and 500 nm (p-v) over the whole mirror surface. In this paper an attempt has been made to refine these specifications to a more phys-ically meaningful set based on the performance of the system. The optical specification for Antares is that 80% of the energy from each beam should be deliverable inside a 400-μm circle. The diffraction limited focal spot is 160 pm across, so small amounts of low spa-tial frequency wavefront aberrations are acceptable. This is the "figure error" and can be represented by a best-fit fourth-order polynomial. It is specified separately from the higher spatial frequency "subfigure" errors that diffract light out of the 400-μm circle. Antares will have a completely automatic alignment and centering system. A more versatile and less expensive alignment system can be developed if the alignment is done with visible light. This tightens the tolerances on the microsurface but not the figure error. These requirements, along with several lesser ones, must be considered when tolerancing the mirror quality. It appears that the SPDT mirrors turned at Y-12 will meet our minimum requirements.

  20. Resource requirements for digital computations on electrooptical systems

    NASA Astrophysics Data System (ADS)

    Eshaghian, Mary M.; Panda, Dhabaleswar K.; Kumar, V. K. Prasanna

    1991-03-01

    The resource requirements of electrooptical organizations in performing digital computing tasks are studied via a generic model of parallel computation using optical interconnects, called the 'optical model of computation' (OMC). In this model, computation is performed in digital electronics and communication is performed using free space optics. Relationships between information transfer and computational resources in solving a given problem are derived. A computationally intensive operation, two-dimensional digital image convolution is undertaken. Irrespective of the input/output scheme and the order of computation, a lower bound of Omega(nw) is obtained on the optical volume required for convolving a w x w kernel with an n x n image, if the input bits are given to the system only once.

  1. INO340 telescope control system: middleware requirements, design, and evaluation

    NASA Astrophysics Data System (ADS)

    Shalchian, Hengameh; Ravanmehr, Reza

    2016-07-01

    The INO340 Control System (INOCS) is being designed in terms of a distributed real-time architecture. The real-time (soft and firm) nature of many processes inside INOCS causes the communication paradigm between its different components to be time-critical and sensitive. For this purpose, we have chosen the Data Distribution Service (DDS) standard as the communications middleware which is itself based on the publish-subscribe paradigm. In this paper, we review and compare the main middleware types, and then we illustrate the middleware architecture of INOCS and its specific requirements. Finally, we present the experimental results, performed to evaluate our middleware in order to ensure that it meets our requirements.

  2. Satellite Power Systems (SPS) concept definition study. Volume 2: SPS system requirements

    NASA Technical Reports Server (NTRS)

    Hanley, G.

    1978-01-01

    Collected data reflected the level of definition resulting from the evaluation of a broad spectrum of SPS (satellite power systems) concepts. As the various concepts matured, these requirements were updated to reflect the requirements identified for the projected satellite system/subsystem point design(s). The study established several candidate concepts which were presented to provide a basis for the selection of one or two approaches that would be given a more comprehensive examination. The two selected concepts were expanded and constitute the selected system point designs. The identified system/subsystem requirements was emphasized and information on the selected point design was provided.

  3. 78 FR 55060 - Proposed Information Collection; Comment Request; Expanded Vessel Monitoring System Requirement...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-09

    ... Vessel Monitoring System Requirement in the Pacific Coast Groundfish Fishery AGENCY: National Oceanic and... commercial fishing vessels are required to install and use a vessel monitoring system (VMS)...

  4. NIRVANA GOSIP (Government Open Systems Interconnect Profile) requirements

    SciTech Connect

    Wood, B.J.

    1990-08-01

    NIRVANA is an effort to standardize electrical computer-aided design workstations at Sandia National Laboratories in Albuquerque, New Mexico. The early effect of this project will be the introduction of at least 60 new engineering workstations at Sandia National Laboratories, Albuquerque, and at Allied Signal, Kansas City Division. These workstations are expected to begin arriving in September 1990. This paper outlines the requirements that a NIRVANA Network must satisfy to comply with the Government Open Systems Interconnect Profile (GOSIP). The author also identifies several issues involved in achieving GOSIP compliance. 4 refs., 1 fig.

  5. Search Hanford accessible reports electronically system requirements specification

    SciTech Connect

    Willers, K.J.

    1994-02-28

    The Emergency, Safety, & Quality (ESQ) Services organization of Westinghouse Hanford Company (WHC) is experiencing changes related to new programs. The programs include Corrective Actions Management Systems, Self-Assessment, Trend Analysis, and Lessons Learned analysis. The programs are pushing up organizational costs while funding and manpower levels are projected to be dropping. A large cost involved in implementing the new programs is the cost for people to locate unstructured information required to make decisions or write documentation. But, most resources for retrieving information are found in structured database systems. This means that unstructured information that must be located has to be found by one of these methods: (1) searching manually through documents, (2) searching individual documents one at a time with word processing programs, (3) searching through text fields with query systems primarily designed for structured database information, or (4) develop a text search and retrieval system designed for unstructured information. One example of this is using Occurrence Reporting Processing System (ORPS) and Quality, Environmental, and Safety Tracking (QUEST) documents. An explanation of this is in the following textual box.

  6. Overall requirements for an advanced underground coal extraction system

    SciTech Connect

    Goldsmith, M.; Lavin, M.L.

    1980-10-15

    This report presents overall requirements on underground mining systems suitable for coal seams exploitable in the year 2000, with particular relevance to the resources of Central Appalachia. These requirements may be summarized as follows: (1) Production Cost: demonstrate a return on incremental investment of 1.5 to 2.5 times the value required by a low-risk capital project. (2) Miner Safety: achieve at least a 50% reduction in deaths and disabling injuries per million man-hours. (3) Miner Health: meet the intent of all applicable regulations, with particular attention to coal dust, carcinogens, and mutagens; and with continued emphasis on acceptable levels of noise and vibration, lighting, humidity and temperature, and adequate work space. (4) Environmental Impact: maintain the value of mined and adjacent lands at the pre-mining value following reclamation; mitigation of off-site impacts should not cost more than the procedures used in contemporary mining. (5) Coal Conservation: the recovery of coal from the seam being mined should be at least as good as the best available contemporary technology operating in comparable conditions. No significant trade-offs between production cost and other performance indices were found.

  7. Electronic collection system for spacelab mission timeline requirements

    NASA Technical Reports Server (NTRS)

    Lindberg, James P.; Piner, John R.; Huang, Allen K. H.

    1995-01-01

    This paper describes the Functional Objective Requirements Collection System (FORCS) software tool that has been developed for use by Principal Investigators (PI's) and Payload Element Developers (PED's) on their own personal computers to develop on-orbit timelining requirements for their payloads. The FORCS tool can be used either in a totally stand-alone mode, storing the information in a local file on the user's personal computer hard disk or in a remote mode where the user's computer is linked to a host computer containing the integrated database of the timeline requirements for all of the payloads on a mission. There are a number of features incorporated in the FORCS software to assist the user. The user may move freely back and forth between the various forms for inputting the data. Several methods are used to input the information, depending on the type of the information. These methods range from filling in text boxes, using check boxes and radio buttons, to inputting information into a spreadsheet format. There are automated features provided to assist in developing the proper format for the data, ranging from limit checking on some of the parameters to automatic conversion of different formats of time data inputs to the one standard format used for the timeline scheduling software.

  8. Space station resistojet system requirements and interface definition study

    NASA Technical Reports Server (NTRS)

    Heckert, Bruce J.

    1987-01-01

    Preliminary resistojet design requirements were established based on initial technical requirements imposed by the results of NASA and Rocketdyne studies. The requirements are directed toward long life, simplicity, flexibility, and commonality with other space station components. The resistojet assembly is comprised of eight resistojets, fluid components downstream of the waste fluid storage system, a power controller, structure, and shielding. It consists of two identical subassemblies, one of which is redundant. Each subassembly consists of four 500-W resistojets, series redundant latch values, a power controller, a water vaporizer, two pressure regulators, filters, check valves, disconnects, fluid tubing, and electrical cables. All components are packaged at the end of the stinger aft of the JEM and Columbus modules. Different flow and power control methods were studied. A constant inlet pressure and a two-power setting controller were tentatively selected based on simplicity and reasonably high specific impulse for the range of waste gas compositions that are anticipated. The constant pressure is supplied by pressure regulators. The two set point power control includes individual power supplies to each resistojet heater and water vaporizer. An embedded data processor, a multiplexer-demultiplexer, and a network interface unit that are standard space station components are included in the power controller. The total dry weight of the resistojet assembly is approximately 172 lb. The total cost for design, development, test, evaluation, qualification, and flight hardware is estimated to be $16 million.

  9. Reliability and availability requirements analysis for DEMO: fuel cycle system

    SciTech Connect

    Pinna, T.; Borgognoni, F.

    2015-03-15

    The Demonstration Power Plant (DEMO) will be a fusion reactor prototype designed to demonstrate the capability to produce electrical power in a commercially acceptable way. Two of the key elements of the engineering development of the DEMO reactor are the definitions of reliability and availability requirements (or targets). The availability target for a hypothesized Fuel Cycle has been analysed as a test case. The analysis has been done on the basis of the experience gained in operating existing tokamak fusion reactors and developing the ITER design. Plant Breakdown Structure (PBS) and Functional Breakdown Structure (FBS) related to the DEMO Fuel Cycle and correlations between PBS and FBS have been identified. At first, a set of availability targets has been allocated to the various systems on the basis of their operating, protection and safety functions. 75% and 85% of availability has been allocated to the operating functions of fuelling system and tritium plant respectively. 99% of availability has been allocated to the overall systems in executing their safety functions. The chances of the systems to achieve the allocated targets have then been investigated through a Failure Mode and Effect Analysis and Reliability Block Diagram analysis. The following results have been obtained: 1) the target of 75% for the operations of the fuelling system looks reasonable, while the target of 85% for the operations of the whole tritium plant should be reduced to 80%, even though all the tritium plant systems can individually reach quite high availability targets, over 90% - 95%; 2) all the DEMO Fuel Cycle systems can reach the target of 99% in accomplishing their safety functions. (authors)

  10. Space station data system analysis/architecture study. Task 1: Functional requirements definition, DR-5. Appendix: Requirements data base

    NASA Technical Reports Server (NTRS)

    1985-01-01

    Appendix A contains data that characterize the system functions in sufficient depth as to determine the requirements for the Space Station Data System (SSDS). This data is in the form of: (1) top down traceability report; (2) bottom up traceability report; (3) requirements data sheets; and (4) cross index of requirements paragraphs of the source documents and the requirements numbers. A data base users guide is included that interested parties can use to access the requirements data base and get up to date information about the functions.

  11. Innovative requirements and technologies for future RLVs health management system

    NASA Astrophysics Data System (ADS)

    Maltecca, L.; Miccichè, L.; Russo, G.; Sellitto, M.

    2002-07-01

    The Italian aerospace research program PRORA (PROgramma nazionale di Ricerche Aerospaziali), which has been conceived and managed by CIRA (Italian Aerospace Research Center), is focused on the development of innovative technologies, also based on experience from flying test beds. One family of these test beds, designated USV (Unmanned Space Vehicle) will be dedicated to acquire the knowledge about future RLV (Reusable Launch Vehicle) technologies. Major strategic technologies identified are reusability, hypersonic flight and atmospheric re-entry. The Phase-A study has been concluded and recently approved. Laben (a Finmeccanica Company) has contributed to identify requirements for the next generations of on board Vehicle Health Management System (VHMS) and to investigate possible innovative architectures. This new generation VHMS will be able to manage in a real-time mode the health of the vehicle (structure, propulsion, avionics, etc.). The proposed approach is based on a set of decentralised computers linked via an advanced high-speed interconnect system. This paper will describe preliminary requirements analysis and trade-off's mainly in terms of HW (e.g. use of general purpose CPUs versus DSPs, interconnects and topologies).

  12. Focusing the research agenda for simulation training visual system requirements

    NASA Astrophysics Data System (ADS)

    Lloyd, Charles J.

    2014-06-01

    Advances in the capabilities of the display-related technologies with potential uses in simulation training devices continue to occur at a rapid pace. Simultaneously, ongoing reductions in defense spending stimulate the services to push a higher proportion of training into ground-based simulators to reduce their operational costs. These two trends result in increased customer expectations and desires for more capable training devices, while the money available for these devices is decreasing. Thus, there exists an increasing need to improve the efficiency of the acquisition process and to increase the probability that users get the training devices they need at the lowest practical cost. In support of this need the IDEAS program was initiated in 2010 with the goal of improving display system requirements associated with unmet user needs and expectations and disrupted acquisitions. This paper describes a process of identifying, rating, and selecting the design parameters that should receive research attention. Analyses of existing requirements documents reveal that between 40 and 50 specific design parameters (i.e., resolution, contrast, luminance, field of view, frame rate, etc.) are typically called out for the acquisition of a simulation training display system. Obviously no research effort can address the effects of this many parameters. Thus, we developed a defensible strategy for focusing limited R&D resources on a fraction of these parameters. This strategy encompasses six criteria to identify the parameters most worthy of research attention. Examples based on display design parameters recommended by stakeholders are provided.

  13. Facility Systems, Ground Support Systems, and Ground Support Equipment General Design Requirements

    NASA Technical Reports Server (NTRS)

    Thaxton, Eric A.; Mathews, Roger E.

    2014-01-01

    This standard establishes requirements and guidance for design and fabrication of ground systems (GS) that includes: ground support equipment (GSE), ground support systems (GSS), and facility ground support systems (F GSS) to provide uniform methods and processes for design and development of robust, safe, reliable, maintainable, supportable, and cost-effective GS in support of space flight and institutional programs and projects.

  14. L-Band Digital Aeronautical Communications System Engineering - Concepts of Use, Systems Performance, Requirements, and Architectures

    NASA Technical Reports Server (NTRS)

    Zelkin, Natalie; Henriksen, Stephen

    2010-01-01

    This NASA Contractor Report summarizes and documents the work performed to develop concepts of use (ConUse) and high-level system requirements and architecture for the proposed L-band (960 to 1164 MHz) terrestrial en route communications system. This work was completed as a follow-on to the technology assessment conducted by NASA Glenn Research Center and ITT for the Future Communications Study (FCS). ITT assessed air-to-ground (A/G) communications concepts of use and operations presented in relevant NAS-level, international, and NAS-system-level documents to derive the appropriate ConUse relevant to potential A/G communications applications and services for domestic continental airspace. ITT also leveraged prior concepts of use developed during the earlier phases of the FCS. A middle-out functional architecture was adopted by merging the functional system requirements identified in the bottom-up assessment of existing requirements with those derived as a result of the top-down analysis of ConUse and higher level functional requirements. Initial end-to-end system performance requirements were derived to define system capabilities based on the functional requirements and on NAS-SR-1000 and the Operational Performance Assessment conducted as part of the COCR. A high-level notional architecture of the L-DACS supporting A/G communication was derived from the functional architecture and requirements.

  15. Observing System Simulations for ASCENDS: Synthesizing Science Measurement Requirements (Invited)

    NASA Astrophysics Data System (ADS)

    Kawa, S. R.; Baker, D. F.; Schuh, A. E.; Crowell, S.; Rayner, P. J.; Hammerling, D.; Michalak, A. M.; Wang, J. S.; Eluszkiewicz, J.; Ott, L.; Zaccheo, T.; Abshire, J. B.; Browell, E. V.; Moore, B.; Crisp, D.

    2013-12-01

    The measurement of atmospheric CO2 from space using active (lidar) sensing techniques has several potentially significant advantages in comparison to current and planned passive CO2 instruments. Application of this new technology aims to advance CO2 measurement capability and carbon cycle science into the next decade. The NASA Active Sensing of Carbon Emissions, Nights, Days, and Seasons (ASCENDS) mission has been recommended by the US National Academy of Sciences Decadal Survey for the next generation of space-based CO2 observing systems. ASCENDS is currently planned for launch in 2022. Several possible lidar instrument approaches have been demonstrated in airborne campaigns and the results indicate that such sensors are quite feasible. Studies are now underway to evaluate performance requirements for space mission implementation. Satellite CO2 observations must be highly precise and unbiased in order to accurately infer global carbon source/sink fluxes. Measurement demands are likely to further increase in the wake of GOSAT, OCO-2, and enhanced ground-based in situ and remote sensing CO2 data. The objective of our work is to quantitatively and consistently evaluate the measurement capabilities and requirements for ASCENDS in the context of advancing our knowledge of carbon flux distributions and their dependence on underlying physical processes. Considerations include requirements for precision, relative accuracy, spatial/temporal coverage and resolution, vertical information content, interferences, and possibly the tradeoffs among these parameters, while at the same time framing a mission that can be implemented within a constrained budget. Here, we attempt to synthesize the results of observing system simulation studies, commissioned by the ASCENDS Science Requirements Definition Team, into a coherent set of mission performance guidelines. A variety of forward and inverse model frameworks are employed to reduce the potential dependence of the results on model

  16. Performance Requirements for the Double Shell Tank (DST) System Phase 1

    SciTech Connect

    SMITH, D.F.

    2001-03-06

    This document describes the performance requirements for the Double-Shell Tank (DST) System. These requirements reflect the projected waste transfers from several case scenarios. These requirements, in turn, will be incorporated into a specification for the DST System.

  17. Mission control communications interface requirements study, space transportation system, volume 1

    NASA Technical Reports Server (NTRS)

    1976-01-01

    Communications traffic models required by the STS Operator to satisfy the operational requirements and concepts were developed. Detailed requirements for the ground system required for flight control of the STS and interface with Payload Operations Control Centers were constructed.

  18. Solar power satellite. System definition study. Part 1, volume 4: SPS transportation system requirements. [spacecraft propulsion

    NASA Technical Reports Server (NTRS)

    1977-01-01

    The best estimates of space transportation requirements for cargo launch vehicles, personnel launch carriers, high thrust orbit transfer, and electric orbit transfer systems are discussed, along with the rationale for each.

  19. 30 CFR 250.440 - What are the general requirements for BOP systems and system components?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Blowout Preventer (bop) System Requirements § 250.440...

  20. 30 CFR 250.440 - What are the general requirements for BOP systems and system components?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Blowout Preventer (bop) System Requirements § 250.440...

  1. 30 CFR 250.440 - What are the general requirements for BOP systems and system components?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ..., DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Blowout Preventer (bop) System Requirements § 250.440 What are the...

  2. 30 CFR 250.440 - What are the general requirements for BOP systems and system components?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Blowout Preventer (bop) System Requirements § 250.440...

  3. Basic Requirements for Systems Software Research and Development

    NASA Technical Reports Server (NTRS)

    Kuszmaul, Chris; Nitzberg, Bill

    1996-01-01

    Our success over the past ten years evaluating and developing advanced computing technologies has been due to a simple research and development (R/D) model. Our model has three phases: (a) evaluating the state-of-the-art, (b) identifying problems and creating innovations, and (c) developing solutions, improving the state- of-the-art. This cycle has four basic requirements: a large production testbed with real users, a diverse collection of state-of-the-art hardware, facilities for evalua- tion of emerging technologies and development of innovations, and control over system management on these testbeds. Future research will be irrelevant and future products will not work if any of these requirements is eliminated. In order to retain our effectiveness, the numerical aerospace simulator (NAS) must replace out-of-date production testbeds in as timely a fashion as possible, and cannot afford to ignore innovative designs such as new distributed shared memory machines, clustered commodity-based computers, and multi-threaded architectures.

  4. Rf System Requirements for JLab’s MEIC Collider Ring

    SciTech Connect

    Wang, Shaoheng; Li, Rui; Rimmer, Robert A.; Wang, Haipeng; Zhang, Yuhong

    2013-06-01

    The Medium-energy Electron Ion Collider (MEIC), proposed by Jefferson Lab, consists of a series of accelerators. At the top energy are the electron and ion collider rings. For the ion ring, it accelerates five long ion bunches to colliding energy and rebunches ions into a train of very short bunches before colliding. A set of low frequency RF system is needed for the long ion bunch energy ramping. Another set of high frequency RF cavities is needed to rebunch ions. For the electron ring, superconducting RF (SRF) cavities are needed to compensate the synchrotron radiation energy loss. The impedance of the SRF cavities must be low enough to keep the high current electron beam stable. The preliminary design requirements of these RF cavities are presented.

  5. Technology requirements for advanced earth-orbital transportation systems

    NASA Technical Reports Server (NTRS)

    Haefeli, R. C.; Littler, E. G.; Hurley, J. B.; Winter, M. G.

    1977-01-01

    Areas of advanced technology that are either critical or offer significant benefits to the development of future Earth-orbit transportation systems were identified. Technology assessment was based on the application of these technologies to fully reusable, single-stage-to-orbit (SSTO) vehicle concepts with horizontal landing capability. Study guidelines included mission requirements similar to space shuttle, an operational capability begining in 1995, and main propulsion to be advanced hydrogen-fueled rocket engines. Also evaluated was the technical and economic feasibility of this class of SSTO concepts and the comparative features of three operational take-off modes, which were vertical boost, horizontal sled launch, and horizontal take-off with subsequent inflight fueling. Projections of both normal and accelerated technology growth were made. Figures of merit were derived to provide relative rankings of technology areas. The influence of selected accelerated areas on vehicle design and program costs was analyzed by developing near-optimum point designs.

  6. Review of power requirements for satellite remote sensing systems

    NASA Technical Reports Server (NTRS)

    Morain, Stanley A.

    1988-01-01

    The space environment offers a multitude of attributes and opportunities to be used to enhance human life styles and qualities of life for all future generations, worldwide. Among the prospects having immense social as well as economic benefits are earth-observing systems capable of providing near real-time data in such areas as food and fiber production, marine fisheries, ecosystem monitoring, disaster assessment, and global environmental exchanges. The era of Space Station, the Shuttle program, the planned unmanned satellites in both high and low Earth orbit will transfer to operational status what, until now, has been largely research and development proof of concept for remotely sensing Earth's natural and cultural resources. An important aspect of this operational status focuses on the orbital designs and power requirements needed to optimally sense any of these important areas.

  7. The Requirements and Design of the Rapid Prototyping Capabilities System

    NASA Astrophysics Data System (ADS)

    Haupt, T. A.; Moorhead, R.; O'Hara, C.; Anantharaj, V.

    2006-12-01

    The Rapid Prototyping Capabilities (RPC) system will provide the capability to rapidly evaluate innovative methods of linking science observations. To this end, the RPC will provide the capability to integrate the software components and tools needed to evaluate the use of a wide variety of current and future NASA sensors, numerical models, and research results, model outputs, and knowledge, collectively referred to as "resources". It is assumed that the resources are geographically distributed, and thus RPC will provide the support for the location transparency of the resources. The RPC system requires providing support for: (1) discovery, semantic understanding, secure access and transport mechanisms for data products available from the known data provides; (2) data assimilation and geo- processing tools for all data transformations needed to match given data products to the model input requirements; (3) model management including catalogs of models and model metadata, and mechanisms for creation environments for model execution; and (4) tools for model output analysis and model benchmarking. The challenge involves developing a cyberinfrastructure for a coordinated aggregate of software, hardware and other technologies, necessary to facilitate RPC experiments, as well as human expertise to provide an integrated, "end-to-end" platform to support the RPC objectives. Such aggregation is to be achieved through a horizontal integration of loosely coupled services. The cyberinfrastructure comprises several software layers. At the bottom, the Grid fabric encompasses network protocols, optical networks, computational resources, storage devices, and sensors. At the top, applications use workload managers to coordinate their access to physical resources. Applications are not tightly bounded to a single physical resource. Instead, they bind dynamically to resources (i.e., they are provisioned) via a common grid infrastructure layer. For the RPC system, the

  8. Radiometer system requirements for microwave remote sensing from satellites

    NASA Technical Reports Server (NTRS)

    Juang, Jeng-Nan

    1990-01-01

    An area of increasing interest is the establishment of a significant research program in microwave remote sensing from satellites, particularly geosynchronous satellites. Due to the relatively small resolution cell sizes, a severe requirement is placed on beam efficiency specifications for the radiometer antenna. Geostationary satellite microwave radiometers could continuously monitor several important geophysical parameters over the world's oceans. These parameters include the columnar content of atmospheric liquid water (both cloud and rain) and water vapor, air temperature profiles, and possibly sea surface temperature. Two principle features of performance are of concern. The first is the ability of the radiometer system to resolve absolute temperatures with a very small absolute error, a capability that depends on radiometer system stability, on frequency bandwidth, and on footprint dwell time. The second is the ability of the radiometer to resolve changes in temperature from one resolution cell to the next when these temperatures are subject to wide variation over the overall field-of-view of the instrument. Both of these features are involved in the use of the radiometer data to construct high-resolution temperature maps with high absolute accuracy.

  9. Facility Systems, Ground Support Systems, and Ground Support Equipment General Design Requirements

    NASA Technical Reports Server (NTRS)

    Thaxton, Eric A.

    2014-01-01

    KSC-DE-512-SM establishes overall requirements and best design practices to be used at the John F. Kennedy Space Center (KSC) for the development of ground systems (GS) in support of operations at launch, landing, and retrieval sites. These requirements apply to the design and development of hardware and software for ground support equipment (GSE), ground support systems (GSS), and facility ground support systems (F-GSS) used to support the KSC mission for transportation, receiving, handling, assembly, test, checkout, servicing, and launch of space vehicles and payloads and selected flight hardware items for retrieval. This standards manual supplements NASA-STD-5005 by including KSC-site-specific and local environment requirements. These requirements and practices are optional for equipment used at manufacturing, development, and test sites.

  10. System Design Techniques for Reducing the Power Requirements of Advanced life Support Systems

    NASA Technical Reports Server (NTRS)

    Finn, Cory; Levri, Julie; Pawlowski, Chris; Crawford, Sekou; Luna, Bernadette (Technical Monitor)

    2000-01-01

    The high power requirement associated with overall operation of regenerative life support systems is a critical Z:p technological challenge. Optimization of individual processors alone will not be sufficient to produce an optimized system. System studies must be used in order to improve the overall efficiency of life support systems. Current research efforts at NASA Ames Research Center are aimed at developing approaches for reducing system power and energy usage in advanced life support systems. System energy integration and energy reuse techniques are being applied to advanced life support, in addition to advanced control methods for efficient distribution of power and thermal resources. An overview of current results of this work will be presented. The development of integrated system designs that reuse waste heat from sources such as crop lighting and solid waste processing systems will reduce overall power and cooling requirements. Using an energy integration technique known as Pinch analysis, system heat exchange designs are being developed that match hot and cold streams according to specific design principles. For various designs, the potential savings for power, heating and cooling are being identified and quantified. The use of state-of-the-art control methods for distribution of resources, such as system cooling water or electrical power, will also reduce overall power and cooling requirements. Control algorithms are being developed which dynamically adjust the use of system resources by the various subsystems and components in order to achieve an overall goal, such as smoothing of power usage and/or heat rejection profiles, while maintaining adequate reserves of food, water, oxygen, and other consumables, and preventing excessive build-up of waste materials. Reductions in the peak loading of the power and thermal systems will lead to lower overall requirements. Computer simulation models are being used to test various control system designs.

  11. 21 CFR 821.25 - Device tracking system and content requirements: manufacturer requirements.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... for tracked devices that are intended for use by a single patient over the life of the device, after...: manufacturer requirements. 821.25 Section 821.25 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES MEDICAL DEVICE TRACKING REQUIREMENTS...

  12. Universal Documentation System Handbook. Volume 2. Requirement Formats and Instructions; Program Introduction, Program Requirements Document/Operations Requirements

    DTIC Science & Technology

    1989-08-01

    agency conoept of support r qaired to include the extent of gc.neral supporL facilities ai loyistics. 0 List overall personnel assignment schedules...PREPARATION INSlUCIONS FO 2400 - AI /GRJND VOICE OCtW2NICATIONS NOTE: This format is used to specify the general air/ground voice oxmmunication...the total number of circuits needed to satisfy all the requirments within the line items. RERF : Enter any remarks in this entry that will further

  13. 40 CFR Table 6 to Subpart Vvvvvv... - Emission Limits and Compliance Requirements for Wastewater Systems

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... Requirements for Wastewater Systems 6 Table 6 to Subpart VVVVVV of Part 63 Protection of Environment... of Part 63—Emission Limits and Compliance Requirements for Wastewater Systems As required in § 63.11498, you must comply with the requirements for wastewater systems as shown in the following table....

  14. 40 CFR Table 6 to Subpart Vvvvvv... - Emission Limits and Compliance Requirements for Wastewater Systems

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Requirements for Wastewater Systems 6 Table 6 to Subpart VVVVVV of Part 63 Protection of Environment... of Part 63—Emission Limits and Compliance Requirements for Wastewater Systems As required in § 63.11498, you must comply with the requirements for wastewater systems as shown in the following table....

  15. 40 CFR Table 6 to Subpart Vvvvvv... - Emission Limits and Compliance Requirements for Wastewater Systems

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Requirements for Wastewater Systems 6 Table 6 to Subpart VVVVVV of Part 63 Protection of Environment... of Part 63—Emission Limits and Compliance Requirements for Wastewater Systems As required in § 63.11498, you must comply with the requirements for wastewater systems as shown in the following table....

  16. 40 CFR Table 8 to Subpart Vvvvvv... - Emission Limits and Compliance Requirements for Heat Exchange Systems

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Requirements for Heat Exchange Systems 8 Table 8 to Subpart VVVVVV of Part 63 Protection of Environment... of Part 63—Emission Limits and Compliance Requirements for Heat Exchange Systems As required in § 63.11499, you must comply with the requirements for heat exchange systems as shown in the following...

  17. Detailed requirements document for the problem reporting data system (PDS). [space shuttle and batch processing

    NASA Technical Reports Server (NTRS)

    West, R. S.

    1975-01-01

    The system is described as a computer-based system designed to track the status of problems and corrective actions pertinent to space shuttle hardware. The input, processing, output, and performance requirements of the system are presented along with standard display formats and examples. Operational requirements, hardware, requirements, and test requirements are also included.

  18. Onboard Inert Gas Generation System/Onboard Oxygen Gas Generation System (OBIGGS/OBOGS) Study. Part 1; Aircraft System Requirements

    NASA Technical Reports Server (NTRS)

    Reynolds, Thomas L.; Bailey, Delbert B.; Lewinski, Daniel F.; Roseburg, Conrad M.; Palaszewski, Bryan (Technical Monitor)

    2001-01-01

    The purpose of this technology assessment is to define a multiphase research study program investigating Onboard Inert Gas Generation Systems (OBIGGS) and Onboard Oxygen Generation Systems (OBOGS) that would identify current airplane systems design and certification requirements (Subtask 1); explore state-of-the-art technology (Subtask 2); develop systems specifications (Subtask 3); and develop an initial system design (Subtask 4). If feasible, consideration may be given to the development of a prototype laboratory test system that could potentially be used in commercial transport aircraft (Subtask 5). These systems should be capable of providing inert nitrogen gas for improved fire cargo compartment fire suppression and fuel tank inerting and emergency oxygen for crew and passenger use. Subtask I of this research study, presented herein, defines current production aircraft certification requirements and design objectives necessary to meet mandatory FAA certification requirements and Boeing design and performance specifications. These requirements will be utilized for baseline comparisons for subsequent OBIGGS/OBOGS application evaluations and assessments.

  19. Satellite services system analysis study. Volume 3: Service equipment requirements

    NASA Technical Reports Server (NTRS)

    1981-01-01

    Service equipment mission requirements are discussed. On-orbit operations, satellite classes, and reference missions are included. Service equipment usage and requirements are considered. Equipment identification methodology is discussed. Service equipment usage is analyzed, including initial launch, revisit, Earth return, and orbital storage. A summary of service requirements and equipment is presented, including service equipment status, even interaction, satellite features, and observations.

  20. Universal Documentation System Handbook. Volume 2. Requirement Formats and Instructions, Program Introduction, Program Requirements Document/Operations Requirements.

    DTIC Science & Technology

    1989-08-01

    the line for UNIT, enter appropriate measurement units, i.e. feet, meters, feet/secord, degrees, etc. In the column TEST PHASE, list the segments of...the trajectory or test phase in which different measurements or precisions are required. Segments may be described as intervals between events or in...terms of time or range. For example, Launch-to-Bcoster Burn-out (or T-0 to T+6 sec, or Launch to 1,000 ft). Opposite the applicable segment , enter the

  1. Fuel cell systems for passenger cars - opportunities and requirements

    SciTech Connect

    Tachtler, J.; Bourne, C.

    1996-12-31

    From the point of view of energy density, handling and economy, present-day motor fuels are superior to all known alternatives. The internal combustion engine powered by them satisfies the requirements of customers to an excellent degree. The search for alternatives can therefore only be justified if emissions can be avoided totally and non-fossil primary energy sources can be used or at least partially our dependence on mineral oil can be reduced. What was long suspected has been increasingly confirmed, not least by developments at BMW: electricity (stored in batteries) and hydrogen offer the best prerequisites for achieving these goals in the long term. These forms of energy can be produced in sufficient quantities and with relatively little effect on the environment. They promise to produce an absolute minimum of pollutants when used in vehicles. Natural gas, which is very similar to hydrogen, and hybrid systems, that would compensate for battery risks, could perform a valuable function in the transitional phase.

  2. 40 CFR 280.42 - Requirements for hazardous substance UST systems.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... that meets the following requirements: (a) Release detection at existing UST systems must meet the... systems must meet the release detection requirements for new systems in paragraph (b) of this section. (b) Release detection at new hazardous substance UST systems must meet the following requirements:...

  3. 46 CFR 153.406 - Standards for containment systems having required restricted gauges.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 5 2011-10-01 2011-10-01 false Standards for containment systems having required... MATERIALS Design and Equipment Cargo Gauging Systems § 153.406 Standards for containment systems having required restricted gauges. When Table 1 requires a cargo's containment system to have a restricted...

  4. 46 CFR 153.406 - Standards for containment systems having required restricted gauges.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 5 2010-10-01 2010-10-01 false Standards for containment systems having required... MATERIALS Design and Equipment Cargo Gauging Systems § 153.406 Standards for containment systems having required restricted gauges. When Table 1 requires a cargo's containment system to have a restricted...

  5. Satellite Power Systems (SPS) concept definition study (Exhibit D). Volume 7: System/subsystems requirements databook

    NASA Technical Reports Server (NTRS)

    Hanley, G. M.

    1981-01-01

    This volume summarizes the basic requirements used as a guide to systems analysis, and is a basis for the selection of candidate Satellite Power Systems (SPS) point designs. Initially, these collected data reflected the level of definition resulting from the evaluation of a broad spectrum of SPS concepts. As the various concepts matured, these requirements were updated to reflect the requirements identified for the projected satellite system/subsystem point designs. Included is an updated version of earlier Rockwell concepts using klystrons as the specific microwave power amplification approach, as well as a more in-depth definition, analysis and preliminary point design on two concepts based on the use of advanced solid state technology to accomplish the task of high power amplification of the 2.45 GHz transmitted power beam to the Earth receiver. Finally, a preliminary definition of a concept using magnetrons as the microwave power amplifiers is presented.

  6. Proposed system safety design and test requirements for the microlaser ordnance system

    NASA Technical Reports Server (NTRS)

    Stoltz, Barb A.; Waldo, Dale F.

    1993-01-01

    Safety for pyrotechnic ignition systems is becoming a major concern for the military. In the past twenty years, stray electromagnetic fields have steadily increased during peacetime training missions and have dramatically increased during battlefield missions. Almost all of the ordnance systems in use today depend on an electrical bridgewire for ignition. Unfortunately, the bridgewire is the cause of the majority of failure modes. The common failure modes include the following: broken bridgewires; transient RF power, which induces bridgewire heating; and cold temperatures, which contracts the explosive mix away from the bridgewire. Finding solutions for these failure modes is driving the costs of pyrotechnic systems up. For example, analyses are performed to verify that the system in the environment will not see more energy than 20 dB below the 'No-fire' level. Range surveys are performed to determine the operational, storage, and transportation RF environments. Cryogenic tests are performed to verify the bridgewire to mix interface. System requirements call for 'last minute installation,' 'continuity checks after installation,' and rotating safety devices to 'interrupt the explosive train.' As an alternative, MDESC has developed a new approach based upon our enabling laser diode technology. We believe that Microlaser initiated ordnance offers a unique solution to the bridgewire safety concerns. For this presentation, we will address, from a system safety viewpoint, the safety design and the test requirements for a Microlaser ordnance system. We will also review how this system could be compliant to MIL-STD-1576 and DOD-83578A and the additional necessary requirements.

  7. The Geographic Information System component of the Hanford Environmental Information System. Requirements analysis for HEISGIS

    SciTech Connect

    Tzemos, S.; Overton, E.S.

    1992-01-01

    The Hanford Environmental Information System (HEIS) has been developed to manage the data from the characterization and environmental monitoring of the Hanford Site. HEISGIS is the Geographic Information Systems component of HEIS. This report analyzes the HEISGIS functional requirements as articulated by the members of a GIS subcommittee established by the HEIS Technical Advisory Committee (HTAC) in a series of meetings. These functionalities are identified throughout this report, but no implementation commitment is made. This requirements analysis document will be followed by a brief list of the functionalities that will be implemented in FY91 and a description of the requisite acceptance test criteria.

  8. Aircraft-store Electrical Interconnection System (AEIS) functional requirements

    NASA Astrophysics Data System (ADS)

    Perkins, J. R.; Lautner, D. E.

    1982-11-01

    This paper provides a summary of the work performed under an A2I2 (Aircraft Armament Interoperable Interface) contract sponsored by the Naval Weapon Center and Air Force Armament Laboratory for developing the aircraft-store electrical functional requirements which will be principally implemented by MIL-STD-1760. The paper provides an overview of the overall requirement drivers and then focuses on three principal electrical areas of the AEIS: The power interface, high bandwidth signaling, and digital data transfer. The paper provides insight on derivation of these requirements and supporting rationale in terms of drivers from existing store requirements, developmental store and technology trends, and traditional engineering approaches.

  9. Planetary data system requirements: Multi-mission radio science requirements for the 1978 to 1988 era

    NASA Technical Reports Server (NTRS)

    Howard, H. T. (Editor)

    1979-01-01

    The functional and performance requirements for support of multimission radio science are established. The classes of radio science investigation are described and the needed data is discussed. This document is for a sliding ten year period and will be iterated as the mission set evolves.

  10. 50 CFR 660.312 - Vessel Monitoring System (VMS) requirements.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ..., WA 98115-6349, phone: (206) 526-6133. (2) Activate the mobile transceiver unit, submit an activation... VMS? A VMS consists of a NMFS OLE type-approved mobile transceiver unit that automatically determines... required to have VMS? The following vessels are required to install a NMFS OLE type-approved...

  11. Requirements for Diluting & Flushing Double Shell Tank (DST) Systems

    SciTech Connect

    FASSETT, D.P.

    2000-08-01

    This document identifies requirements and their applicability to the design and operation of the Double-Shell Tank Diluent and Flush Subsystem. The requirements are described here to justify their use in the Double-Shell Tank Diluent and Flush Subsystem Specification (HNF-4163).

  12. 40 CFR 57.703 - Compliance with the supplementary control system requirements.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... control system requirements. 57.703 Section 57.703 Protection of Environment ENVIRONMENTAL PROTECTION... Requirements § 57.703 Compliance with the supplementary control system requirements. This section applies to... shall require immediately upon issuance of the NSO operation of any existing supplementary...

  13. 40 CFR 57.703 - Compliance with the supplementary control system requirements.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... control system requirements. 57.703 Section 57.703 Protection of Environment ENVIRONMENTAL PROTECTION... Requirements § 57.703 Compliance with the supplementary control system requirements. This section applies to... shall require immediately upon issuance of the NSO operation of any existing supplementary...

  14. Detailed requirements document for the Interactive Financial Management System (IFMS), volume 1

    NASA Technical Reports Server (NTRS)

    Dodson, D. B.

    1975-01-01

    The detailed requirements for phase 1 (online fund control, subauthorization accounting, and accounts receivable functional capabilities) of the Interactive Financial Management System (IFMS) are described. This includes information on the following: systems requirements, performance requirements, test requirements, and production implementation. Most of the work is centered on systems requirements, and includes discussions on the following processes: resources authority, allotment, primary work authorization, reimbursable order acceptance, purchase request, obligation, cost accrual, cost distribution, disbursement, subauthorization performance, travel, accounts receivable, payroll, property, edit table maintenance, end-of-year, backup input. Other subjects covered include: external systems interfaces, general inquiries, general report requirements, communication requirements, and miscellaneous. Subjects covered under performance requirements include: response time, processing volumes, system reliability, and accuracy. Under test requirements come test data sources, general test approach, and acceptance criteria. Under production implementation come data base establishment, operational stages, and operational requirements.

  15. 14 CFR 417.303 - Command control system requirements.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... system must transmit a command signal that has the radio frequency characteristics and power needed for receipt of the signal by the onboard vehicle flight termination system. A command control system must... susceptible remote control data processing or transmitting system that is part of the command control...

  16. 14 CFR 417.303 - Command control system requirements.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... system must transmit a command signal that has the radio frequency characteristics and power needed for receipt of the signal by the onboard vehicle flight termination system. A command control system must... susceptible remote control data processing or transmitting system that is part of the command control...

  17. 23 CFR 970.204 - Management systems requirements.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION FEDERAL LANDS HIGHWAYS NATIONAL PARK SERVICE MANAGEMENT SYSTEMS National Park Service Management Systems § 970.204 Management systems... decisions based on management system outputs can be considered at the national, regional, and park levels....

  18. Technology and development requirements for advanced coal conversion systems

    NASA Technical Reports Server (NTRS)

    1981-01-01

    A compendium of coal conversion process descriptions is presented. The SRS and MC data bases were utilized to provide information paticularly in the areas of existing process designs and process evaluations. Additional information requirements were established and arrangements were made to visit process developers, pilot plants, and process development units to obtain information that was not otherwise available. Plant designs, process descriptions and operating conditions, and performance characteristics were analyzed and requirements for further development identified and evaluated to determine the impact of these requirements on the process commercialization potential from the standpoint of economics and technical feasibility. A preliminary methodology was established for the comparative technical and economic assessment of advanced processes.

  19. Functions & Requirements for Debris Removal System Project A-2

    SciTech Connect

    PRECECHTEL, D.R.

    1999-12-29

    This revision of the Functions and Requirements Document updates the approved Functions and Requirements for Debris Removal Subproject WHC-SD-SNF-FRD-009, Rev. 0. It has been revised in its entirety to reflect the current scope of work for Debris Removal as canisters and lids under the K Basin Projects work breakdown structure (WBS). In this revision the canisters and lids will be consider debris and a new set of Functions and Requirements have been developed to remove the canisters and lids from the basin.

  20. 46 CFR 28.350 - General requirements for electrical systems.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... COMMERCIAL FISHING INDUSTRY VESSELS Requirements for Vessels Which Have Their Keel Laid or Are at a Similar... be installed in lockers used to store paint, oil, turpentine, or other flammable or...

  1. 46 CFR 28.845 - General requirements for electrical systems.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... COMMERCIAL FISHING INDUSTRY VESSELS Aleutian Trade Act Vessels § 28.845 General requirements for electrical... be installed in lockers used to store paint, oil, turpentine, or other flammable or...

  2. 46 CFR 28.845 - General requirements for electrical systems.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... COMMERCIAL FISHING INDUSTRY VESSELS Aleutian Trade Act Vessels § 28.845 General requirements for electrical... be installed in lockers used to store paint, oil, turpentine, or other flammable or...

  3. 46 CFR 28.350 - General requirements for electrical systems.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... COMMERCIAL FISHING INDUSTRY VESSELS Requirements for Vessels Which Have Their Keel Laid or Are at a Similar... be installed in lockers used to store paint, oil, turpentine, or other flammable or...

  4. 46 CFR 62.35-50 - Tabulated monitoring and safety control requirements for specific systems.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 2 2013-10-01 2013-10-01 false Tabulated monitoring and safety control requirements for... Systems § 62.35-50 Tabulated monitoring and safety control requirements for specific systems. The minimum instrumentation, alarms, and safety controls required for specific types of systems are listed in Table...

  5. Performance Requirements for the Double Shell Tank (DST) System Phase 1

    SciTech Connect

    SMITH, D.F.

    2000-04-20

    This document describes the performance requirements for the Double-Shell Tank (DST) System. These requirements reflect the Case 3, Project Planning Case from the Tank Waste Remediation System Operation and Utilization Plan, Revision 1. These requirements, in turn, will be incorporated into a specification for the DST System.

  6. 14 CFR 417.303 - Command control system requirements.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... flight termination system used for each launch. (f) Electromagnetic interference. Each command control system component must function within the electromagnetic environment to which it is exposed. A command... must prevent electromagnetic interference. (g) Command transmitter failover. A command control...

  7. 14 CFR 417.303 - Command control system requirements.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... flight termination system used for each launch. (f) Electromagnetic interference. Each command control system component must function within the electromagnetic environment to which it is exposed. A command... must prevent electromagnetic interference. (g) Command transmitter failover. A command control...

  8. 14 CFR 417.303 - Command control system requirements.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... flight termination system used for each launch. (f) Electromagnetic interference. Each command control system component must function within the electromagnetic environment to which it is exposed. A command... must prevent electromagnetic interference. (g) Command transmitter failover. A command control...

  9. 47 CFR 15.511 - Technical requirements for surveillance systems.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... bandwidth of an imaging system operating under the provisions of this section must be contained between 1990... surveillance systems operated by law enforcement, fire or emergency rescue organizations or by manufacturers... the procedures described in § 15.521. (f) Imaging systems operating under the provisions of...

  10. 49 CFR 393.40 - Required brake systems.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... provided in this section. (b) Service brakes—(1) Hydraulic brake systems. Motor vehicles equipped with hydraulic brake systems and manufactured on or after September 2, 1983, must, at a minimum, have a service...—partial failure of service brakes—(1) Hydraulic brake systems. Motor vehicles manufactured on or...

  11. 49 CFR 393.40 - Required brake systems.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... provided in this section. (b) Service brakes—(1) Hydraulic brake systems. Motor vehicles equipped with hydraulic brake systems and manufactured on or after September 2, 1983, must, at a minimum, have a service...—partial failure of service brakes—(1) Hydraulic brake systems. Motor vehicles manufactured on or...

  12. 48 CFR 252.215-7002 - Cost estimating system requirements.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... the estimating methods and rationale used in developing cost estimates and budgets; (v) Provide for... management systems; and (4) Is subject to applicable financial control systems. Estimating system means the Contractor's policies, procedures, and practices for budgeting and planning controls, and...

  13. Design requirements for SRB production control system. Volume 1: Study background and overview

    NASA Technical Reports Server (NTRS)

    1981-01-01

    The solid rocket boosters assembly environment is described in terms of the contraints it places upon an automated production control system. The business system generated for the SRB assembly and the computer system which meets the business system requirements are described. The selection software process and modifications required to the recommended software are addressed as well as the hardware and configuration requirements necessary to support the system.

  14. Manned geosynchronous mission requirements and systems analysis study extension

    NASA Technical Reports Server (NTRS)

    1981-01-01

    Turnaround requirements for the manned orbital transfer vehicle (MOTV) baseline and alternate concepts with and without a space operations center (SOC) are defined. Manned orbital transfer vehicle maintenance, refurbishment, resupply, and refueling are considered as well as the most effective combination of ground based and space based turnaround activities. Ground and flight operations requirements for abort are identified as well as low cost approaches to space and ground operations through maintenance and missions sensitivity studies. The recommended turnaround mix shows that space basing MOTV at SOC with periodic return to ground for overhaul results in minimum recurring costs. A pressurized hangar at SOC reduces labor costs by approximately 50%.

  15. 47 CFR 73.687 - Transmission system requirements.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...) Spurious emissions, including radio frequency harmonics, shall be maintained at as low a level as the state of the art permits. As measured at the output terminals of the transmitter (including harmonic filters, if required) all emissions removed in frequency in excess of 3 MHz above or below the...

  16. 47 CFR 73.687 - Transmission system requirements.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...) Spurious emissions, including radio frequency harmonics, shall be maintained at as low a level as the state of the art permits. As measured at the output terminals of the transmitter (including harmonic filters, if required) all emissions removed in frequency in excess of 3 MHz above or below the...

  17. 40 CFR 761.211 - Manifest system-Transporter requirements.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...) TOXIC SUBSTANCES CONTROL ACT POLYCHLORINATED BIPHENYLS (PCBs) MANUFACTURING, PROCESSING, DISTRIBUTION IN COMMERCE, AND USE PROHIBITIONS PCB Waste Disposal Records and Reports § 761.211 Manifest system—Transporter requirements. (a)(1) A transporter shall not accept PCB waste from a generator unless it is accompanied by...

  18. 40 CFR 761.211 - Manifest system-Transporter requirements.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...) TOXIC SUBSTANCES CONTROL ACT POLYCHLORINATED BIPHENYLS (PCBs) MANUFACTURING, PROCESSING, DISTRIBUTION IN COMMERCE, AND USE PROHIBITIONS PCB Waste Disposal Records and Reports § 761.211 Manifest system—Transporter requirements. (a)(1) A transporter shall not accept PCB waste from a generator unless it is accompanied by...

  19. Functional interferon system is required for clearance of lassa virus.

    PubMed

    Yun, Nadezhda E; Poussard, Allison L; Seregin, Alexey V; Walker, Aida G; Smith, Jennifer K; Aronson, Judith F; Smith, Jeanon N; Soong, Lynn; Paessler, Slobodan

    2012-03-01

    Lassa virus (LASV) is the causative agent of Lassa hemorrhagic fever (LF) in humans, a deadly disease endemic to West Africa that results in 5,000 to 10,000 deaths annually. Here we present results demonstrating that functional type I and type II interferon (IFN) signaling is required for efficient control of LASV dissemination and clearance.

  20. 50 CFR 660.14 - Vessel Monitoring System (VMS) requirements.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 98115-6349, phone: (206) 526-6133. (2) Activate the mobile transceiver unit, submit an activation report...? A VMS consists of a NMFS OLE type-approved mobile transceiver unit that automatically determines the... a VMS? The following vessels are required to install a NMFS OLE type-approved mobile...

  1. 46 CFR 167.45-50 - Foam smothering system requirements.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 167.45-50 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) NAUTICAL SCHOOLS PUBLIC NAUTICAL SCHOOL SHIPS Special Firefighting and Fire Prevention Requirements § 167.45-50 Foam smothering... deep in not more than 3 minutes. The arrangement of piping shall be such as to give a...

  2. 46 CFR 167.45-50 - Foam smothering system requirements.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 167.45-50 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) NAUTICAL SCHOOLS PUBLIC NAUTICAL SCHOOL SHIPS Special Firefighting and Fire Prevention Requirements § 167.45-50 Foam smothering... deep in not more than 3 minutes. The arrangement of piping shall be such as to give a...

  3. Video requirements plan for the HMT equipment removal system

    SciTech Connect

    Vargo, G.F. Jr.

    1995-02-01

    This document is the plan defining the video coverage requirements for the equipment removal event of the Hydrogen Mitigation Test (HMT) mixer pump currently installed in high level nuclear waste storage Tank 241-SY-101. When the mixer pump fails the removal and installation of a spare pump will be a time critical event. Since the success of the HMT mixer pump has resolved the DOE safety issue it is absolutely essential that mixing be restored to the tank in a short as time possible. Therefore, the removal of the failed pump and the installation of the spare pump must be anticipated and planned well in advance. The removal, containment, transporting, and storage of the failed pump is a very complex and hazardous task. The successful completion of this task will require careful planning and monitoring. Certain events, during the removal and subsequent installation of the new pump, will require video observation and storage for safety, documenting, training, and promotional use. Furthermore, certain events will require close monitoring and observation by the event directors and key supervisory personnel for the execution of specific tasks during the equipment removal event.

  4. 30 CFR 250.803 - Additional production system requirements.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... pressure vessels at any time when there is a change in operating pressures that requires new settings for... significant change in operating pressures. The most recent pressure-recorder charts used to determine... subfreezing climates, the lessee shall furnish evidence to the District Manager that the firefighting...

  5. 30 CFR 250.803 - Additional production system requirements.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... pressure vessels at any time when there is a change in operating pressures that requires new settings for... significant change in operating pressures. The most recent pressure-recorder charts used to determine... subfreezing climates, the lessee shall furnish evidence to the District Manager that the firefighting...

  6. 30 CFR 250.803 - Additional production system requirements.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... ranges of pressure vessels at any time when there is a change in operating pressures that requires new... significant change in operating pressures. The most recent pressure-recorder charts used to determine... prominent place on the facility or structure. (v) For operations in subfreezing climates, the lessee...

  7. 30 CFR 250.803 - Additional production system requirements.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... pressure vessels at any time when there is a change in operating pressures that requires new settings for... significant change in operating pressures. The most recent pressure-recorder charts used to determine... subfreezing climates, the lessee shall furnish evidence to the District Manager that the firefighting...

  8. 50 CFR 660.14 - Vessel Monitoring System (VMS) requirements.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Sand Point Way NE., Seattle, WA 98115-6349, phone: (206) 526-6133. (2) Activate the mobile transceiver...? A VMS consists of a NMFS OLE type-approved mobile transceiver unit that automatically determines the... a VMS? The following vessels are required to install a NMFS OLE type-approved mobile...

  9. 50 CFR 660.14 - Vessel Monitoring System (VMS) requirements.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Sand Point Way NE., Seattle, WA 98115-6349, phone: (206) 526-6133. (2) Activate the mobile transceiver...? A VMS consists of a NMFS OLE type-approved mobile transceiver unit that automatically determines the... a VMS? The following vessels are required to install a NMFS OLE type-approved mobile...

  10. 50 CFR 660.14 - Vessel Monitoring System (VMS) requirements.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Sand Point Way NE., Seattle, WA 98115-6349, phone: (206) 526-6133. (2) Activate the mobile transceiver...? A VMS consists of a NMFS OLE type-approved mobile transceiver unit that automatically determines the... a VMS? The following vessels are required to install a NMFS OLE type-approved mobile...

  11. 47 CFR 73.687 - Transmission system requirements.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...) Spurious emissions, including radio frequency harmonics, shall be maintained at as low a level as the state... filters, if required) all emissions removed in frequency in excess of 3 MHz above or below the respective... attenuate its emissions within the frequency range 467 to 470 MHz and a Channel 69 station must...

  12. An Operational Approach to Requirements Specification for Embedded Systems.

    DTIC Science & Technology

    1981-08-01

    language can have is to be unable to express what the requirements analyst wants to say. This is the problem that makes analysts revert to English ...APPENDIX: A GRAMMAR FOR PAISLEY This gramar is LALR, and is written in BNF with nonterminals underlined. Comments are transparent, and can therefore

  13. Student Performance Requirements: Minitary Service. Continuation Education System Development Project.

    ERIC Educational Resources Information Center

    La Puente Union High School District, CA.

    Funded under Title III of the Elementary and Secondary Education Act of 1965, the La Puente, California, continuation education project investigated (1) attitudes of former students concerning the success of the school in preparing them for entry into military service, (2) the minimal skills and knowledge required by each of the armed forces, (3)…

  14. Algorithmic requirements for swarm intelligence in differently coupled collective systems

    PubMed Central

    Stradner, Jürgen; Thenius, Ronald; Zahadat, Payam; Hamann, Heiko; Crailsheim, Karl; Schmickl, Thomas

    2013-01-01

    Swarm systems are based on intermediate connectivity between individuals and dynamic neighborhoods. In natural swarms self-organizing principles bring their agents to that favorable level of connectivity. They serve as interesting sources of inspiration for control algorithms in swarm robotics on the one hand, and in modular robotics on the other hand. In this paper we demonstrate and compare a set of bio-inspired algorithms that are used to control the collective behavior of swarms and modular systems: BEECLUST, AHHS (hormone controllers), FGRN (fractal genetic regulatory networks), and VE (virtual embryogenesis). We demonstrate how such bio-inspired control paradigms bring their host systems to a level of intermediate connectivity, what delivers sufficient robustness to these systems for collective decentralized control. In parallel, these algorithms allow sufficient volatility of shared information within these systems to help preventing local optima and deadlock situations, this way keeping those systems flexible and adaptive in dynamic non-deterministic environments. PMID:23805030

  15. User Requirements in Man-Machine Interactive Systems.

    ERIC Educational Resources Information Center

    Dave, Ashok

    The basic objective of the development of man-machine interactive systems is to design a system that will most effectively take into account the limitations and talents of both man and machine, recognizing that the human factors are, in certain aspects, diametrically opposed to those of the computer. This document briefly investigates those…

  16. The Synergism of User Needs, System Requirements, and Technological Limitations.

    ERIC Educational Resources Information Center

    Levine, Gwen R.

    User perception of data importance and the economic feasibility of hardware and storage devices will determine the future direction of online systems. A retrieval system's functions are ultimately dictated by database design. Early online sytems were designed for bibliographic information limited to citations only using sequential files. When…

  17. Semantic Modeling of Requirements: Leveraging Ontologies in Systems Engineering

    ERIC Educational Resources Information Center

    Mir, Masood Saleem

    2012-01-01

    The interdisciplinary nature of "Systems Engineering" (SE), having "stakeholders" from diverse domains with orthogonal facets, and need to consider all stages of "lifecycle" of system during conception, can benefit tremendously by employing "Knowledge Engineering" (KE) to achieve semantic agreement among all…

  18. 5 CFR 9901.405 - Performance management system requirements.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 5 Administrative Personnel 3 2011-01-01 2011-01-01 false Performance management system... DEFENSE NATIONAL SECURITY PERSONNEL SYSTEM (NSPS) Performance Management § 9901.405 Performance management... performance management system— (1) Provides for the appraisal of the performance of each employee annually;...

  19. Results from Symposium on Future Orbital Power Systems Technology Requirements

    NASA Technical Reports Server (NTRS)

    Gorland, S.

    1979-01-01

    Technology deficiencies, adequacy of current programs, and recommendations for reducing the testing and risks involved in future orbital energy systems made at the NASA Symposium are summarized. Photovoltaic space power system problems, including structural dynamics and attitude control problems due to solar array flexing; solar cell radiation resistance, manufacturing capability, and cost reduction; solar arrays including inflatable arrays, spectrum selection to increase efficiency, and polymer coatings for cells; battery technology; the endurance data base for fuel cell and electrolysis technology, and power management were discussed. Other topics considered were laser/microwave power transmission, thermal management, nuclear power systems, and environmental interactions. It was concluded that a 'front end' system study is needed in each area and current programs for multi-hundred-kW power systems are underscoped.

  20. MARA (Multimode Airborne Radar Altimeter) system documentation. Volume 1: MARA system requirements document

    NASA Astrophysics Data System (ADS)

    Parsons, C. L.

    1989-07-01

    The Multimode Airborne Radar Altimeter (MARA), a flexible airborne radar remote sensing facility developed by NASA's Goddard Space Flight Center, is discussed. This volume describes the scientific justification for the development of the instrument and the translation of these scientific requirements into instrument design goals. Values for key instrument parameters are derived to accommodate these goals, and simulations and analytical models are used to estimate the developed system's performance.

  1. MARA (Multimode Airborne Radar Altimeter) system documentation. Volume 1: MARA system requirements document

    NASA Technical Reports Server (NTRS)

    Parsons, C. L. (Editor)

    1989-01-01

    The Multimode Airborne Radar Altimeter (MARA), a flexible airborne radar remote sensing facility developed by NASA's Goddard Space Flight Center, is discussed. This volume describes the scientific justification for the development of the instrument and the translation of these scientific requirements into instrument design goals. Values for key instrument parameters are derived to accommodate these goals, and simulations and analytical models are used to estimate the developed system's performance.

  2. System Design Description and Requirements for Modeling the Off-Gas Systems for Fuel Recycling Facilities

    SciTech Connect

    Daryl R. Haefner; Jack D. Law; Troy J. Tranter

    2010-08-01

    This document provides descriptions of the off-gases evolved during spent nuclear fuel processing and the systems used to capture the gases of concern. Two reprocessing techniques are discussed, namely aqueous separations and electrochemical (pyrochemical) processing. The unit operations associated with each process are described in enough detail so that computer models to mimic their behavior can be developed. The document also lists the general requirements for the desired computer models.

  3. System identification requirements for high-bandwidth rotorcraft flight control system design

    NASA Technical Reports Server (NTRS)

    Tischler, Mark B.

    1990-01-01

    The application of system identification methods to high-bandwidth rotorcraft flight control system design is examined. Flight test and modeling requirements are illustrated using flight test data from a BO-105 hingeless rotor helicopter. The proposed approach involves the identification of nonparametric frequency-response models followed by parametric (transfer funtion and state space) model identification. Results for the BO-105 show the need for including coupled body/rotor flapping and lead-lag dynamics in the identification model structure to allow the accurate prediction of control system bandwidth limitations. Lower-order models are useful for estimating nominal control system performance only when the flight data used for the identification are band-limited to be consistent with the frequency range of applicability of the model. The flight test results presented in this paper are consistent with theoretical studies by previous researchers.

  4. A Proposed Material Requirements Planning System for NARF Alameda.

    DTIC Science & Technology

    1980-03-01

    in general and stock availability in particular is a vital part of the plan. Demand forecasting by workload driven material requirements planning (MRP...CATION OFr THIS PAGIt (b DNe ,,w UNCLASSIFIED fOCMVv CLISIJlOICATION ev Too$$ wasOfI¢ e Meoe 9.00" means to improve stock availability. This thesis...Oakland. Improving supply support of the Naval Air Rework Facility Alameda in general and stock availability in particular is a vital part of the plan

  5. Multileaf collimator characteristics and reliability requirements for IMRT Elekta system.

    PubMed

    Liu, Chihray; Simon, Thomas A; Fox, Christopher; Li, Jonathan; Palta, Jatinder R

    2008-01-01

    Understanding the characteristics of a multileaf collimator (MLC) system, modeling MLC in a treatment planning system, and maintaining the mechanical accuracy of the linear accelerator gantry head system are important factors in the safe implementation of an intensity-modulated radiotherapy program. We review the characteristics of an Elekta MLC system, discuss the necessary MLC modeling parameters for a treatment planning system, and provide a novel method to establish an MLC leaf position quality assurance program. To perform quality assurance on 40 pairs of individual MLC leaves is a time-consuming and difficult task. In this report, an effective routine MLC quality assurance method based on the field edge of a backup jaw as referenced in conjunction with a diode array as a radiation detector system is discussed. The sensitivity of this test for determining the relative leaf positions was observed to be better than 0.1 mm. The Elekta MLC leaf position accuracy measured with this system has been better than 0.3 mm.

  6. 78 FR 79455 - Information Collection; System for Award Management Registration Requirements for Prime Grant...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-30

    ... ADMINISTRATION Information Collection; System for Award Management Registration Requirements for Prime Grant.... ADDRESSES: Submit comments identified by Information Collection 3090- 0290, System for Award Management... comments only and cite Information Collection 3090-0290, System for Award Management...

  7. Analysis of data systems requirements for global crop production forecasting in the 1985 time frame

    NASA Technical Reports Server (NTRS)

    Downs, S. W.; Larsen, P. A.; Gerstner, D. A.

    1978-01-01

    Data systems concepts that would be needed to implement the objective of the global crop production forecasting in an orderly transition from experimental to operational status in the 1985 time frame were examined. Information needs of users were converted into data system requirements, and the influence of these requirements on the formulation of a conceptual data system was analyzed. Any potential problem areas in meeting these data system requirements were identified in an iterative process.

  8. Requirements on Clinical Trial Management Systems for Academic Site Management Organizations.

    PubMed

    Schöbel, Martin; Stäubert, Sebastian; Löbe, Matthias; Meinel, Kirsti; Winter, Alfred

    2016-01-01

    As a part of the introduction of a Clinical Trial Management System (CTMS) for an Academic Site Management Organization (SMO) we had to determine the requirements such a system has to meet. By performing extensive Requirements Engineering, we aimed at raising the success of the future system and the user satisfaction. Investigations revealed the existence of TORE (Task and Object-oriented Requirements Engineering), a task-driven approach for determining requirements on user interface- and information-intensive systems. In this paper, we present an adoption of this method for our purposes, resulting in a reasonable list of requirements for CTMS acquisition.

  9. 46 CFR 27.205 - What are the requirements for internal communication systems on towing vessels?

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 1 2013-10-01 2013-10-01 false What are the requirements for internal communication... requirements for internal communication systems on towing vessels? (a) You must ensure that your vessel is... required to have internal communication systems. (c) When the operating-station's engine controls and...

  10. 46 CFR 27.205 - What are the requirements for internal communication systems on towing vessels?

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 1 2010-10-01 2010-10-01 false What are the requirements for internal communication... requirements for internal communication systems on towing vessels? (a) You must ensure that your vessel is... required to have internal communication systems. (c) When the operating-station's engine controls and...

  11. 46 CFR 27.205 - What are the requirements for internal communication systems on towing vessels?

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 1 2012-10-01 2012-10-01 false What are the requirements for internal communication... requirements for internal communication systems on towing vessels? (a) You must ensure that your vessel is... required to have internal communication systems. (c) When the operating-station's engine controls and...

  12. 46 CFR 27.205 - What are the requirements for internal communication systems on towing vessels?

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 1 2014-10-01 2014-10-01 false What are the requirements for internal communication... requirements for internal communication systems on towing vessels? (a) You must ensure that your vessel is... required to have internal communication systems. (c) When the operating-station's engine controls and...

  13. 40 CFR 63.11498 - What are the standards and compliance requirements for wastewater systems?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... requirements for wastewater systems? 63.11498 Section 63.11498 Protection of Environment ENVIRONMENTAL... and compliance requirements for wastewater systems? (a) You must comply with the requirements in paragraph (a)(1) and (2) of this section and in Table 6, Item 1 to this subpart for all wastewater...

  14. 40 CFR 63.11498 - What are the standards and compliance requirements for wastewater systems?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... requirements for wastewater systems? 63.11498 Section 63.11498 Protection of Environment ENVIRONMENTAL... and compliance requirements for wastewater systems? (a) You must comply with the requirements in paragraph (a)(1) and (2) of this section and in Table 6, Item 1 to this subpart for all wastewater...

  15. 40 CFR 63.11498 - What are the standards and compliance requirements for wastewater systems?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... requirements for wastewater systems? 63.11498 Section 63.11498 Protection of Environment ENVIRONMENTAL... and compliance requirements for wastewater systems? (a) You must comply with the requirements in paragraph (a)(1) and (2) of this section and in Table 6, Item 1 to this subpart for all wastewater...

  16. 40 CFR 63.11498 - What are the standards and compliance requirements for wastewater systems?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... requirements for wastewater systems? 63.11498 Section 63.11498 Protection of Environment ENVIRONMENTAL... and compliance requirements for wastewater systems? (a) You must comply with the requirements in paragraph (a)(1) and (2) of this section and in Table 6, Item 1 to this subpart for all wastewater...

  17. 40 CFR 63.11498 - What are the standards and compliance requirements for wastewater systems?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... requirements for wastewater systems? 63.11498 Section 63.11498 Protection of Environment ENVIRONMENTAL... and compliance requirements for wastewater systems? (a) You must comply with the requirements in paragraph (a)(1) and (2) of this section and in Table 6, Item 1 to this subpart for all wastewater...

  18. 46 CFR 27.205 - What are the requirements for internal communication systems on towing vessels?

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... required to have internal communication systems. (c) When the operating-station's engine controls and the... requirements for internal communication systems on towing vessels? (a) You must ensure that your vessel is... 46 Shipping 1 2011-10-01 2011-10-01 false What are the requirements for internal...

  19. Formal representation of the requirements for an Advanced Subsonic Civil Transport (ASCT) flight control system

    NASA Technical Reports Server (NTRS)

    Frincke, Deborah; Wolber, Dave; Fisher, Gene; Cohen, Gerald C.; Mclees, R. E.

    1992-01-01

    A partial requirement specification for an Advanced Subsonic Civil Transport (ASCT) Flight Control System is described. The example was adopted from requirements given in a NASA Contractor report. The language used to describe the requirements, Requirements Specification Language (RSL), is described in a companion document.

  20. 39 CFR 501.7 - Postage Evidencing System requirements.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... maintain neutrality on religious, social, political, legal, moral, or other public issues; (2) Is not... system, whether within the boundaries of the indicia or outside the clear zone as defined in DMM...

  1. Design requirements for SRB production control system. Volume 4: Implementation

    NASA Technical Reports Server (NTRS)

    1981-01-01

    The implementation plan which is presented was developed to provide the means for the successful implementation of the automated production control system. There are three factors which the implementation plan encompasses: detailed planning; phased implementation; and user involvement. The plan is detailed to the task level in terms of necessary activities as the system is developed, refined, installed, and tested. These tasks are scheduled, on a preliminary basis, over a two-and-one-half-year time frame.

  2. Icing-Protection Requirements for Reciprocating-Engine Induction System

    NASA Technical Reports Server (NTRS)

    Coles, Willard D; Rollin, Vern G; Mulholland, Donald R

    1950-01-01

    Despite the development of relatively ice-free fuel-metering systems, the widespread use of alternate and heated-air intakes, and the use of alcohol for emergency de-icing, icing of aircraft-engine induction systems is a serious problem. Investigations have been made to study and to combat all phases of this icing problem. From these investigations, criterions for safe operation and for design of new induction systems have been established. The results were obtained from laboratory investigations of carburetor-supercharger combinations, wind-tunnel investigations of air scoops, multicylinder-engine studies, and flight investigations. Characteristics of three forms of ice, impact, throttling, and fuel evaporation were studied. The effects of several factors on the icing characteristics were also studied and included: (1) atmospheric conditions, (2) engine and air-scoop configurations, including light-airplane system, (3) type fuel used, and (4) operating variables, such as power condition, use of a manifold pressure regulator, mixture setting, carburetor heat, and water-alcohol injection. In addition, ice-detection methods were investigated and methods of preventing and removing induction-system ice were studied. Recommendations are given for design and operation with regard to induction-system design.

  3. Integrated Information Support System (IISS). Volume 4. IISS System. Part 1. System Requirements Document

    DTIC Science & Technology

    1990-09-30

    including foreign nations DA ,D L . S N, Pr ect Manager DATE Wriht-Pat srs AFB, OH 45433-6533 FOR THE COMMANDER: ’ARUCE A. RASMUSSEN, Chief DATE WRDC/MTI O...Technology Directorate, through Mr. David L . Judson, Project Manager . The Prime Contractor was Integration Technology Services, Software Programs Division, of...network, the restart and recovery requirements, and the monitoring of performance . The Network Transaction Manager is invoked to carry out the following

  4. Turbine Engine Loads Simulator (TELS) Radiographic Systems Requirements Study

    DTIC Science & Technology

    1977-06-01

    TABLE OF CONTENTS INTRODUCTION SUMMARY RECOMMENDATIONS FOR RESEARCH AND DEVELOPMENT RADIOGRAPHIC REQUIREMENTS...53 60 60 64 64 67 68 73 75 75 76 78 84 84 84 85 86 87 87 87 88 90 ¢ A EDC-TR-77-55 TABLE OF CONTENTS (Cont ’d) SECTION...to X-ray Source PAGE 131 133 135 138 139 141 143 155 157 159 161 177 184 8 TABLE I II I!! IV C-I C-II C-Ill E-1 E-2 E-3

  5. NASA TSRV essential flight control system requirements via object oriented analysis

    NASA Technical Reports Server (NTRS)

    Duffy, Keith S.; Hoza, Bradley J.

    1992-01-01

    The objective was to analyze the baseline flight control system of the Transport Systems Research Vehicle (TSRV) and to develop a system specification that offers high visibility of the essential system requirements in order to facilitate the future development of alternate, more advanced software architectures. The flight control system is defined to be the baseline software for the TSRV research flight deck, including all navigation, guidance, and control functions, and primary pilot displays. The Object Oriented Analysis (OOA) methodology developed is used to develop a system requirement definition. The scope of the requirements definition contained herein is limited to a portion of the Flight Management/Flight Control computer functionality. The development of a partial system requirements definition is documented, and includes a discussion of the tasks required to increase the scope of the requirements definition and recommendations for follow-on research.

  6. Bureau of Prisons access control system: functional and operational requirements

    NASA Astrophysics Data System (ADS)

    Janus, Michael; Carlson, Peter M.; Kane, Thomas

    1997-01-01

    The Federal Bureau of Prisons (BOP) operates 86 correctional institutions nationwide. The BOP has grown dramatically, the size of its inmate population growing from just over 41,000 inmates in 1987 to over 100,000 today. The number of BOP staff managing these facilities has grown correspondingly, more than doubling in number in the same ten year period. Technology has paid a major role in keeping up with this growth while maintaining high standards of security in BOP institutions. In an attempt to further enhance security in its institutions, the BOP has recently begun pilot testing an access control and entry system (ACES). ACES is intended to provide an automated record of very entry and exit to a correctional institution. ACES takes advantage of several methods of identifying an individual (inmate, staff or visitor) to assure that the individual exiting the institution is the same as the individual entering. The pilot test has raised a number of questions regarding the implementation of a technologically sophisticated system in a correctional institution. Questions of training, support, 'ownership,' cost effectiveness, and future potential all influence the deployment of this system. Preliminary results indicate that an adequate training and support system is essential to the performance of any sophisticated system and that other organizational issues need to be addressed before the decision to implement is made.

  7. Material requirements for bio-inspired sensing systems

    NASA Astrophysics Data System (ADS)

    Biggins, Peter; Lloyd, Peter; Salmond, David; Kusterbeck, Anne

    2008-10-01

    The aim of developing bio-inspired sensing systems is to try and emulate the amazing sensitivity and specificity observed in the natural world. These capabilities have evolved, often for specific tasks, which provide the organism with an advantage in its fight to survive and prosper. Capabilities cover a wide range of sensing functions including vision, temperature, hearing, touch, taste and smell. For some functions, the capabilities of natural systems are still greater than that achieved by traditional engineering solutions; a good example being a dog's sense of smell. Furthermore, attempting to emulate aspects of biological optics, processing and guidance may lead to more simple and effective devices. A bio-inspired sensing system is much more than the sensory mechanism. A system will need to collect samples, especially if pathogens or chemicals are of interest. Other functions could include the provision of power, surfaces and receptors, structure, locomotion and control. In fact it is possible to conceive of a complete bio-inspired system concept which is likely to be radically different from more conventional approaches. This concept will be described and individual component technologies considered.

  8. Assessment of the impact of dipped guideways on urban rail transit systems: Ventilation and safety requirements

    NASA Technical Reports Server (NTRS)

    1982-01-01

    The ventilation and fire safety requirements for subway tunnels with dipped profiles between stations as compared to subway tunnels with level profiles were evaluated. This evaluation is based upon computer simulations of a train fire emergency condition. Each of the tunnel configurations evaluated was developed from characteristics that are representative of modern transit systems. The results of the study indicate that: (1) The level tunnel system required about 10% more station cooling than dipped tunnel systems in order to meet design requirements; and (2) The emergency ventilation requirements are greater with dipped tunnel systems than with level tunnel systems.

  9. Euclid imaging channels: from science to system requirements

    NASA Astrophysics Data System (ADS)

    Amiaux, J.; Auguères, J. L.; Boulade, O.; Cara, C.; Paulin-Henriksson, S.; Réfrégier, A.; Ronayette, S.; Amara, A.; Glauser, A.; Dumesnil, C.; di Giorgio, A. M.; Booth, J.; Schweitzer, M.; Holmes, R.; Cropper, M.; Atad-Ettedgui, E.; Duvet, L.; Lumb, D.

    2010-07-01

    Euclid is an ESA Cosmic Vision wide-field space mission concept dedicated to the high-precision study of Dark Energy and Dark Matter. The mission relies on two primary cosmological probes: Weak gravitational Lensing (WL) and Baryon Acoustic Oscillations (BAO). The first probe requires the measurement of the shape and photometric redshifts of distant galaxies. The second probe is based on the 3-dimensional distribution of galaxies through spectroscopic redshifts. Additional cosmological probes are also used and include cluster counts, redshift space distortions, the integrated Sachs-Wolfe effect (ISW) and galaxy clustering, which can all be derived from a combination of imaging and spectroscopy. Euclid Imaging Channels Instrument of the Euclid mission is designed to study the weak gravitational lensing cosmological probe. The combined Visible and Near InfraRed imaging channels form the basis of the weak lensing measurements. The VIS channel provides high-precision galaxy shape measurements for the measurement of weak lensing shear. The NIP channel provides the deep NIR multi-band photometry necessary to derive the photometric redshifts and thus a distance estimate for the lensed galaxies. This paper describes the Imaging Channels design driver requirements to reach the challenging science goals and the design that has been studied during the Cosmic Vision Assessment Phase.

  10. Requirements and approach for a space tourism launch system

    NASA Astrophysics Data System (ADS)

    Penn, Jay P.; Lindley, Charles A.

    2003-01-01

    Market surveys suggest that a viable space tourism industry will require flight rates about two orders of magnitude higher than those required for conventional spacelift. Although enabling round-trip cost goals for a viable space tourism business are about 240/pound (529/kg), or 72,000/passenger round-trip, goals should be about 50/pound (110/kg) or approximately 15,000 for a typical passenger and baggage. The lower price will probably open space tourism to the general population. Vehicle reliabilities must approach those of commercial aircraft as closely as possible. This paper addresses the development of spaceplanes optimized for the ultra-high flight rate and high reliability demands of the space tourism mission. It addresses the fundamental operability, reliability, and cost drivers needed to satisfy this mission need. Figures of merit similar to those used to evaluate the economic viability of conventional commercial aircraft are developed, including items such as payload/vehicle dry weight, turnaround time, propellant cost per passenger, and insurance and depreciation costs, which show that infrastructure can be developed for a viable space tourism industry. A reference spaceplane design optimized for space tourism is described. Subsystem allocations for reliability, operability, and costs are made and a route to developing such a capability is discussed. The vehicle's ability to satisfy the traditional spacelift market is also shown.

  11. SEPS mission and system integration/interface requirements for the space transportation system. [Solar Electric Propulsion System

    NASA Technical Reports Server (NTRS)

    Cork, M. J.; Barnett, P. M.; Shaffer, J., Jr.; Doran, B. J.

    1979-01-01

    Earth escape mission requirements on Solar Electric Propulsion System (SEPS), and the interface definition and planned integration between SEPS, user spacecraft, and other elements of the STS. Emphasis is placed on the Comet rendezvous mission, scheduled to be the first SEPS user. Interactive SEPS interface characteristics with spacecraft and mission, as well as the multiple organizations and inter-related development schedules required to integrate the SEPS with spacecraft and STS, require early attention to definition of interfaces in order to assure a successful path to the first SEPS launch in July 1985

  12. ECASTAR: Energy conservation. An assessment of systems, technologies and requirements

    NASA Technical Reports Server (NTRS)

    1975-01-01

    A methodology was presented for a systems approach to energy conservation actions and their potentials and impacts in the United States. Constraints affecting the approach were ranked, and the most important ones are the present economic and technical conditions. The following unresolved issues were identified: consumptive lifestyles vs. conservation ethic, environmental standards vs. energy conservation, capital availability, decentralization and vertical integration vs. centralization, fuel rich regions vs. fuel poor regions, supply vs. end use conservation, life cycle costing vs. initial cost, mandatory savings vs. voluntary savings, labor intensive vs. capital intensive, price control vs. free market. The following recommendations were made: provide action/impact assessment, establish regional energy centers, improve technology articulation with government, design total energy systems, utilize existing systems approach expertise.

  13. System design requirements for advanced rotary-wing agricultural aircraft

    NASA Technical Reports Server (NTRS)

    Lemont, H. E.

    1979-01-01

    Helicopter aerial dispersal systems were studied to ascertain constraints to the system, the effects of removal of limitations (technical and FAA regulations), and subsystem improvements. Productivity indices for the aircraft and swath effects were examined. Typical missions were formulated through conversations with operators, and differing gross weight aircraft were synthesized to perform these missions. Economic analysis of missions and aircraft indicated a general correlation of small aircraft (3000 lb gross weight) suitability for small fields (25 acres), and low dispersion rates (less than 32 lb/acre), with larger aircraft (12,000 lb gross weight) being more favorable for bigger fields (200 acres) and heavier dispersal rates (100 lb/acre). Operator problems, possible aircraft and system improvements, and selected removal of operating limitations were reviewed into recommendations for future NASA research items.

  14. A requirements specification for a software design support system

    NASA Technical Reports Server (NTRS)

    Noonan, Robert E.

    1988-01-01

    Most existing software design systems (SDSS) support the use of only a single design methodology. A good SDSS should support a wide variety of design methods and languages including structured design, object-oriented design, and finite state machines. It might seem that a multiparadigm SDSS would be expensive in both time and money to construct. However, it is proposed that instead an extensible SDSS that directly implements only minimal database and graphical facilities be constructed. In particular, it should not directly implement tools to faciliate language definition and analysis. It is believed that such a system could be rapidly developed and put into limited production use, with the experience gained used to refine and evolve the systems over time.

  15. 75 FR 22844 - Construction Fall Protection Systems Criteria and Practices and Training Requirements; Extension...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-30

    ... Occupational Safety and Health Administration Construction Fall Protection Systems Criteria and Practices and Training Requirements; Extension of the Office of Management and Budget's (OMB) Approval of Information... extend OMB approval of the information collection requirements contained in the construction standards...

  16. Current and future graphics requirements for LaRC and proposed future graphics system

    NASA Technical Reports Server (NTRS)

    Taylor, N. L.; Bowen, J. T.; Randall, D. P.; Gates, R. L.

    1984-01-01

    The findings of an investigation to assess the current and future graphics requirements of the LaRC researchers with respect to both hardware and software are presented. A graphics system designed to meet these requirements is proposed.

  17. Aerial applications dispersal systems control requirements study. [agriculture

    NASA Technical Reports Server (NTRS)

    Bauchspies, J. S.; Cleary, W. L.; Rogers, W. F.; Simpson, W.; Sanders, G. S.

    1980-01-01

    Performance deficiencies in aerial liquid and dry dispersal systems are identified. Five control system concepts are explored: (1) end of field on/off control; (2) manual control of particle size and application rate from the aircraft; (3) manual control of deposit rate on the field; (4) automatic alarm and shut-off control; and (5) fully automatic control. Operational aspects of the concepts and specifications for improved control configurations are discussed in detail. A research plan to provide the technology needed to develop the proposed improvements is presented along with a flight program to verify the benefits achieved.

  18. Propulsion requirements for the HL-20 personnel launch system

    NASA Astrophysics Data System (ADS)

    Talay, Theodore A.

    1992-07-01

    A lifting-body approach to the design of an HL-20 personnel launch system spacecraft for SSF crew rotation missions is presented. The high hypersonic lift-to-drag ratio of the HL-20 provides significant advantages in reduced g-loads during entry, high crossrange capability, ability to fly to landing sites over an extensive part of the earth, and multiple landing opportunities per day at specific landing sites. The HL-20 is capable of performing a return-to-launch-site runaway landing anytime during the first minute of launch following activation of an enhanced launch escape system.

  19. Propulsion requirements for the HL-20 personnel launch system

    NASA Technical Reports Server (NTRS)

    Talay, Theodore A.

    1992-01-01

    A lifting-body approach to the design of an HL-20 personnel launch system spacecraft for SSF crew rotation missions is presented. The high hypersonic lift-to-drag ratio of the HL-20 provides significant advantages in reduced g-loads during entry, high crossrange capability, ability to fly to landing sites over an extensive part of the earth, and multiple landing opportunities per day at specific landing sites. The HL-20 is capable of performing a return-to-launch-site runaway landing anytime during the first minute of launch following activation of an enhanced launch escape system.

  20. L-Band System Engineering - Concepts of Use, Systems Performance Requirements, and Architecture

    NASA Technical Reports Server (NTRS)

    Henriksen, Stephen; Zelkin, Natalie

    2011-01-01

    This document is being provided as part of ITT s NASA Glenn Research Center Aerospace Communication Systems Technical Support (ACSTS) contract NNC05CA85C, Task 7: New ATM Requirements-Future Communications, C-band and L-band Communications Standard Development. Task 7 was motivated by the five year technology assessment performed for the Federal Aviation Administration (FAA) under the joint FAA-EUROCONTROL cooperative research Action Plan (AP-17), also known as the Future Communications Study (FCS). It was based on direction provided by the FAA project-level agreement (PLA FY09_G1M.02-02v1) for "New ATM Requirements-Future Communications." Task 7 was separated into two distinct subtasks, each aligned with specific work elements and deliverable items. Subtask 7-1 addressed C-band airport surface data communications standards development, systems engineering, test bed development, and tests/demonstrations to establish operational capability for what is now referred to as the Aeronautical Mobile Airport Communications System (AeroMACS). Subtask 7-2, which is the subject of this report, focused on preliminary systems engineering and support of joint FAA/EUROCONTROL development and evaluation of a future L-band (960 to 1164 MHz) air/ground (A/G) communication system known as the L-band digital aeronautical communications system (L-DACS), which was defined during the FCS. The proposed L-DACS will be capable of providing ATM services in continental airspace in the 2020+ timeframe. Subtask 7-2 was performed in two phases. Phase I featured development of Concepts of Use, high level functional analyses, performance of initial L-band system safety and security risk assessments, and development of high level requirements and architectures. It also included the aforementioned support of joint L-DACS development and evaluation, including inputs to L-DACS design specifications. Phase II provided a refinement of the systems engineering activities performed during Phase I, along

  1. System requirements and design features of Space Station Remote Manipulator System mechanisms

    NASA Technical Reports Server (NTRS)

    Kumar, Rajnish; Hayes, Robert

    1991-01-01

    The Space Station Remote Manipulator System (SSRMS) is a long robotic arm for handling large objects/payloads on the International Space Station Freedom. The mechanical components of the SSRMS include seven joints, two latching end effectors (LEEs), and two boom assemblies. The joints and LEEs are complex aerospace mechanisms. The system requirements and design features of these mechanisms are presented. All seven joints of the SSRMS have identical functional performance. The two LEES are identical. This feature allows either end of the SSRMS to be used as tip or base. As compared to the end effector of the Shuttle Remote Manipulator System, the LEE has a latch and umbilical mechanism in addition to the snare and rigidize mechanisms. The latches increase the interface preload and allow large payloads (up to 116,000 Kg) to be handled. The umbilical connectors provide power, data, and video signal transfer capability to/from the SSRMS.

  2. 48 CFR 207.106 - Additional requirements for major systems.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... analysis of the total value, in terms of innovative design, life-cycle costs, and other pertinent factors... license rights needed to sustain those systems and subsystems over their life cycle. The strategy may... contract award; (iii) Address the potential for changes in the sustainment plan over the life cycle of...

  3. 48 CFR 207.106 - Additional requirements for major systems.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... analysis of the total value, in terms of innovative design, life-cycle costs, and other pertinent factors... license rights needed to sustain those systems and subsystems over their life cycle. The strategy may... contract award; (iii) Address the potential for changes in the sustainment plan over the life cycle of...

  4. 48 CFR 207.106 - Additional requirements for major systems.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...-term technical data and computer software needs of those systems and subsystems; and (ii) Establish acquisition strategies that provide for the technical data and computer software deliverables and associated... technical data and computer software, and associated license rights, that were not acquired upon...

  5. 46 CFR 167.45-50 - Foam smothering system requirements.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... discharge over the entire area of the bilge (tank top) of the largest boiler room a volume of foam 6 inches... distribution over the entire area protected. (b) The foam-type system may be of a type approved by the Navy...

  6. 40 CFR 91.327 - Sampling system requirements.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ..., sample line section, filters, and so forth) in the heated portion of the sampling system that has a... mass and the oven temperature need be measured. (b) If water is removed by condensation, monitor the sample gas temperature or sample dew point either within the water trap or downstream. It may not...

  7. 40 CFR 91.327 - Sampling system requirements.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ..., sample line section, filters, and so forth) in the heated portion of the sampling system that has a... mass and the oven temperature need be measured. (b) If water is removed by condensation, monitor the sample gas temperature or sample dew point either within the water trap or downstream. It may not...

  8. 39 CFR 501.7 - Postage Evidencing System requirements.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Performance Criteria for Information-Based Indicia and Security Architecture for Open IBI Postage Evidencing Systems or Performance Criteria for Information-Based Indicia and Security Architecture for Closed IBI... on the Postal Service Web site at http://www.usps.com/postagesolutions/programdoc.html or...

  9. 39 CFR 501.7 - Postage Evidencing System requirements.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... Performance Criteria for Information-Based Indicia and Security Architecture for Open IBI Postage Evidencing Systems or Performance Criteria for Information-Based Indicia and Security Architecture for Closed IBI... on the Postal Service Web site at http://www.usps.com/postagesolutions/programdoc.html or...

  10. 39 CFR 501.7 - Postage Evidencing System requirements.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Performance Criteria for Information-Based Indicia and Security Architecture for Open IBI Postage Evidencing Systems or Performance Criteria for Information-Based Indicia and Security Architecture for Closed IBI... on the Postal Service Web site at http://www.usps.com/postagesolutions/programdoc.html or...

  11. 39 CFR 501.7 - Postage Evidencing System requirements.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Performance Criteria for Information-Based Indicia and Security Architecture for Open IBI Postage Evidencing Systems or Performance Criteria for Information-Based Indicia and Security Architecture for Closed IBI... 604.4.0 and the Performance Criteria for Information-Based Indicia and Security Architecture for...

  12. The HYDROS mission: requirements and baseline system design

    NASA Technical Reports Server (NTRS)

    Njoku, Eni; Spencer, Michael; McDonald, Kyle; Smith, Joel; Houser, Paul; Doiron, Terence; ONeill, Peggy; Girard, Ralph; Entekhabi, Dara

    2004-01-01

    The HYDROS mission is under development by NASA as part of its Earth System Science Pathfinder program. HYDROS is designed to provide global maps of the Earth's soil moisture and freeze/thaw state every 2-3 days, for weather and climate prediction, water and carbon cycle studies, natural hazards monitoring, and national security applications.

  13. Triangulating System Requirements for Users with Severe Motor Disabilities

    ERIC Educational Resources Information Center

    Randolph, Adriane B.

    2012-01-01

    By giving a voice to users in the design process of information systems, they often feel more empowered and engaged. The inclusion of users with disabilities in the design process, however, can be markedly more difficult. User profiling allows a user's preferences and interests to be captured and represented. However, for a user with severe motor…

  14. 46 CFR 151.20-5 - Cargo system valving requirements.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... having a saturated vapor pressure of 10 pounds per square inch gauge or less at 115 °F (105 °F if the... vapor pressure is maintained at 10 pounds per square inch gauge or below shall be provided with a valving system designated as Gravity-2. Cargo tanks for cargoes which have vapor pressures above 10...

  15. 46 CFR 151.20-5 - Cargo system valving requirements.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... having a saturated vapor pressure of 10 pounds per square inch gauge or less at 115 °F (105 °F if the... vapor pressure is maintained at 10 pounds per square inch gauge or below shall be provided with a valving system designated as Gravity-2. Cargo tanks for cargoes which have vapor pressures above 10...

  16. 46 CFR 151.20-5 - Cargo system valving requirements.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... having a saturated vapor pressure of 10 pounds per square inch gauge or less at 115 °F (105 °F if the... vapor pressure is maintained at 10 pounds per square inch gauge or below shall be provided with a valving system designated as Gravity-2. Cargo tanks for cargoes which have vapor pressures above 10...

  17. 40 CFR 90.327 - Sampling system requirements.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... largest thermal mass and the oven temperature need be measured. (b) If water is removed by condensation... sampling systems which use heated components, use engineering judgment to locate the coolest portion of each component (pump, sample line section, filters, and so forth) in the heated portion of the...

  18. 40 CFR 90.327 - Sampling system requirements.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... largest thermal mass and the oven temperature need be measured. (b) If water is removed by condensation... sampling systems which use heated components, use engineering judgment to locate the coolest portion of each component (pump, sample line section, filters, and so forth) in the heated portion of the...

  19. 40 CFR 91.327 - Sampling system requirements.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... components are within an oven, then only the surface temperature of the component with the largest thermal... use heated components, use engineering judgment to locate the coolest portion of each component (pump, sample line section, filters, and so forth) in the heated portion of the sampling system that has...

  20. 46 CFR 167.45-50 - Foam smothering system requirements.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... discharge over the entire area of the bilge (tank top) of the largest boiler room a volume of foam 6 inches deep in not more than 3 minutes. The arrangement of piping shall be such as to give a uniform distribution over the entire area protected. (b) The foam-type system may be of a type approved by the Navy...