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Sample records for providing reliable os

  1. Reliable Re-Os age for molybdenite

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, Katsuhiko (Univ. of Tokyo (Japan)); Lu, Q.; Masuda, Akimasa (Univ. of Electro-Communications, Tokyo (Japan)); Shimizu, Hiroshi (Kumamoto Univ. (Japan))

    1993-04-01

    Re-Os ages for four molybdenites were determined by the authors' newly developed method with isotope dilution-mass spectrometry. Special caution was given to achieve osmium isotopic equilibration between sample and spike during chemical treatment. Re-Os data for molybdenites from Mt. Mulgine (Australia), Maetaesvaara (Finland), Preissac (Canada), and Climax (US) define ages of 2790 Ma, 2600 Ma, 2680 Ma, and 26.6 Ma, respectively. The reproducibilities of their Re-Os age determination are shown to be within 2% by the replicate analyses for Mt. Mulgine, Maetaesvaara, and Preissac samples. The ages obtained are in good agreement with reference ages estimated for wall rocks of molybdenite deposits concerned. Thus, with careful experimental procedure, it appears that the Re-Os geochronometer can be used to reliably determine the age of molybdenite. 32 refs., 1 tab.

  2. Bring Your Own Device - Providing Reliable Model of Data Access

    Directory of Open Access Journals (Sweden)

    Stąpór Paweł

    2016-10-01

    Full Text Available The article presents a model of Bring Your Own Device (BYOD as a model network, which provides the user reliable access to network resources. BYOD is a model dynamically developing, which can be applied in many areas. Research network has been launched in order to carry out the test, in which as a service of BYOD model Work Folders service was used. This service allows the user to synchronize files between the device and the server. An access to the network is completed through the wireless communication by the 802.11n standard. Obtained results are shown and analyzed in this article.

  3. PROVIDING RELIABILITY OF HUMAN RESOURCES IN PRODUCTION MANAGEMENT PROCESS

    Directory of Open Access Journals (Sweden)

    Anna MAZUR

    2014-07-01

    Full Text Available People are the most valuable asset of an organization and the results of a company mostly depends on them. The human factor can also be a weak link in the company and cause of the high risk for many of the processes. Reliability of the human factor in the process of the manufacturing process will depend on many factors. The authors include aspects of human error, safety culture, knowledge, communication skills, teamwork and leadership role in the developed model of reliability of human resources in the management of the production process. Based on the case study and the results of research and observation of the author present risk areas defined in a specific manufacturing process and the results of evaluation of the reliability of human resources in the process.

  4. SRC: FenixOS - A Research Operating System Focused on High Scalability and Reliability

    DEFF Research Database (Denmark)

    Passas, Stavros; Karlsson, Sven

    2011-01-01

    Computer systems keep increasing in size. Systems scale in the number of processing units, memories and peripheral devices. This creates many and diverse architectural trade-offs that the existing operating systems are not able to address. We are designing and implementing, FenixOS, a new operating...... of the operating system....... system that aims to improve the state of the art in scalability and reliability. We achieve scalability through limiting data sharing when possible, and through extensive use of lock-free data structures. Reliability is addressed with a careful re-design of the programming interface and structure...

  5. Fire Extinguisher Control System Provides Reliable Cold Weather Operation

    Science.gov (United States)

    Branum, J. C.

    1967-01-01

    Fast acting, pneumatically and centrally controlled, fire extinguisher /firex/ system is effective in freezing climates. The easy-to-operate system provides a fail-dry function which is activated by an electrical power failure.

  6. Standardized Patients Provide a Reliable Assessment of Athletic Training Students' Clinical Skills

    Science.gov (United States)

    Armstrong, Kirk J.; Jarriel, Amanda J.

    2016-01-01

    Context: Providing students reliable objective feedback regarding their clinical performance is of great value for ongoing clinical skill assessment. Since a standardized patient (SP) is trained to consistently portray the case, students can be assessed and receive immediate feedback within the same clinical encounter; however, no research, to our…

  7. The Impact of Process Capability on Service Reliability for Critical Infrastructure Providers

    Science.gov (United States)

    Houston, Clemith J., Jr.

    2013-01-01

    This study investigated the relationship between organizational processes that have been identified as promoting resiliency and their impact on service reliability within the scope of critical infrastructure providers. The importance of critical infrastructure to the nation is evident from the body of research and is supported by instances where…

  8. A spectral-domain optical coherence tomography device provides reliable corneal pachymetry measurements in canine eyes.

    Science.gov (United States)

    Alario, A F; Pirie, C G

    2013-06-08

    The objective of this study was to determine central corneal thickness (CCT) and the intra- and interuser reliability using a portable spectral-domain optical coherence tomography (SD-OCT) device in canine eyes. Twenty clinically normal dogs were examined. CCT measurements were obtained from both eyes of each animal three times by two operators in succession. The CCT was automatically calculated using the pachymetry software generated from eight radial scans, 6 mm in length. Mean canine CCT was 606.83±39.45 μm for all eyes examined. There was no significant difference in CCT based on the eye examined (OD vs OS), age or gender of the animal. There was no significant difference in CCT between replicates performed by the same operator; however, a small but significant difference was noted in CCT between operators. The mean difference in CCT between operators was 1.9 μm (P=0.03). The coefficient of variation for each user and between users was very low (range 0.64-1.7 per cent). The intraclass correlation coefficient comparing operators was 0.975. Based on these results, the SD-OCT device evaluated is capable of obtaining precise CCT measurements with excellent intra- and interoperator reliability in canine eyes.

  9. Interrater reliability of Violence Risk Appraisal Guide scores provided in Canadian criminal proceedings.

    Science.gov (United States)

    Edens, John F; Penson, Brittany N; Ruchensky, Jared R; Cox, Jennifer; Smith, Shannon Toney

    2016-12-01

    Published research suggests that most violence risk assessment tools have relatively high levels of interrater reliability, but recent evidence of inconsistent scores among forensic examiners in adversarial settings raises concerns about the "field reliability" of such measures. This study specifically examined the reliability of Violence Risk Appraisal Guide (VRAG) scores in Canadian criminal cases identified in the legal database, LexisNexis. Over 250 reported cases were located that made mention of the VRAG, with 42 of these cases containing 2 or more scores that could be submitted to interrater reliability analyses. Overall, scores were skewed toward higher risk categories. The intraclass correlation (ICCA1) was .66, with pairs of forensic examiners placing defendants into the same VRAG risk "bin" in 68% of the cases. For categorical risk statements (i.e., low, moderate, high), examiners provided converging assessment results in most instances (86%). In terms of potential predictors of rater disagreement, there was no evidence for adversarial allegiance in our sample. Rater disagreement in the scoring of 1 VRAG item (Psychopathy Checklist-Revised; Hare, 2003), however, strongly predicted rater disagreement in the scoring of the VRAG (r = .58). (PsycINFO Database Record (c) 2016 APA, all rights reserved).

  10. Validation and reliability of the sex estimation of the human os coxae using freely available DSP2 software for bioarchaeology and forensic anthropology.

    Science.gov (United States)

    Brůžek, Jaroslav; Santos, Frédéric; Dutailly, Bruno; Murail, Pascal; Cunha, Eugenia

    2017-10-01

    A new tool for skeletal sex estimation based on measurements of the human os coxae is presented using skeletons from a metapopulation of identified adult individuals from twelve independent population samples. For reliable sex estimation, a posterior probability greater than 0.95 was considered to be the classification threshold: below this value, estimates are considered indeterminate. By providing free software, we aim to develop an even more disseminated method for sex estimation. Ten metric variables collected from 2,040 ossa coxa of adult subjects of known sex were recorded between 1986 and 2002 (reference sample). To test both the validity and reliability, a target sample consisting of two series of adult ossa coxa of known sex (n = 623) was used. The DSP2 software (Diagnose Sexuelle Probabiliste v2) is based on Linear Discriminant Analysis, and the posterior probabilities are calculated using an R script. For the reference sample, any combination of four dimensions provides a correct sex estimate in at least 99% of cases. The percentage of individuals for whom sex can be estimated depends on the number of dimensions; for all ten variables it is higher than 90%. Those results are confirmed in the target sample. Our posterior probability threshold of 0.95 for sex estimate corresponds to the traditional sectioning point used in osteological studies. DSP2 software is replacing the former version that should not be used anymore. DSP2 is a robust and reliable technique for sexing adult os coxae, and is also user friendly. © 2017 Wiley Periodicals, Inc.

  11. An FEC Adaptive Multicast MAC Protocol for Providing Reliability in WLANs

    Science.gov (United States)

    Basalamah, Anas; Sato, Takuro

    For wireless multicast applications like multimedia conferencing, voice over IP and video/audio streaming, a reliable transmission of packets within short delivery delay is needed. Moreover, reliability is crucial to the performance of error intolerant applications like file transfer, distributed computing, chat and whiteboard sharing. Forward Error Correction (FEC) is frequently used in wireless multicast to enhance Packet Error Rate (PER) performance, but cannot assure full reliability unless coupled with Automatic Repeat Request forming what is knows as Hybrid-ARQ. While reliable FEC can be deployed at different levels of the protocol stack, it cannot be deployed on the MAC layer of the unreliable IEEE802.11 WLAN due to its inability to exchange ACKs with multiple recipients. In this paper, we propose a Multicast MAC protocol that enhances WLAN reliability by using Adaptive FEC and study it's performance through mathematical analysis and simulation. Our results show that our protocol can deliver high reliability and throughput performance.

  12. How to combine multiple techniques to provide reliable in-situ time series for climate applications

    Science.gov (United States)

    Valladeau, G.; Soudarin, L.; Gravelle, M.

    2012-12-01

    Tide gauge measurements, as observations dedicated to climate applications, require a rigorous quality control since measurements are highly sensitive to biases or drifts in datasets. One major part of the error related to the assessment of Sea Surface Height at tide gauge location originates in vertical movements. Indeed, many studies have for instance demonstrated the need for tide gauges to be corrected for land motion when compared with altimeter data. The combination of multiple techniques (altimeter, in-situ and geodetic data) is a way of providing relevant tide gauge time series for end-users and climate applications such as the contribution of ice-sheet mass balance to the global sea-level. In this way, DORIS (Doppler Orbitography and Radiopositioning Integrated by Satellite) as well as GNSS (Global Navigation Satellite System) are considered as complementary techniques. They determine the crustal motion at a cm (or better) and mm/yr accuracy for the positions and velocities respectively. As the DORIS network was deployed by a geodetic institution, great care was taken when selecting the geographical location of the tracking stations to co-locate them with other space geodetic techniques (VLBI, SLR and GNSS), but also with tide gauges. Hence, as on May 2012, 22 DORIS stations are within 10 km from a tide gauge, including 8 within 500m. Ties between the DORIS antennas and the nearby tide gauge are also available when the measurement is possible. This study focuses on the example of the Thule tide gauge for which measurements are compared to the different techniques previously described. First, the comparison to both DORIS and GNSS data provides relevant information about the strong crustal movement North of Greenland. Then the use of altimeter data confirms results deduced from geodetic stations and give a larger view on the behavior of land motion around the Thule tide gauge. Therefore, the combination of multiple techniques is used to provide reliable tide

  13. High-density surface electromyography provides reliable estimates of motor unit behavior.

    Science.gov (United States)

    Martinez-Valdes, E; Laine, C M; Falla, D; Mayer, F; Farina, D

    2016-06-01

    To assess the intra- and inter-session reliability of estimates of motor unit behavior and muscle fiber properties derived from high-density surface electromyography (HDEMG). Ten healthy subjects performed submaximal isometric knee extensions during three recording sessions (separate days) at 10%, 30%, 50% and 70% of their maximum voluntary effort. The discharge timings of motor units of the vastus lateralis and medialis muscles were automatically identified from HDEMG by a decomposition algorithm. We characterized the number of detected motor units, their discharge rates, the coefficient of variation of their inter-spike intervals (CoVisi), the action potential conduction velocity and peak-to-peak amplitude. Reliability was assessed for each motor unit characteristics by intra-class correlation coefficient (ICC). Additionally, a pulse-to-noise ratio (PNR) was calculated, to verify the accuracy of the decomposition. Good to excellent reliability within and between sessions was found for all motor unit characteristics at all force levels (ICCs>0.8), with the exception of CoVisi that presented poor reliability (ICC95%). Motor unit features can be assessed non-invasively and reliably within and across sessions over a wide range of force levels. These results suggest that it is possible to characterize motor units in longitudinal intervention studies. Copyright © 2016 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.

  14. RELIABILITY OF FLIGHT DATA PROVIDED BY PORTABLE GPS RECEIVERS DURING AIR ACCIDENT INVESTIGATION

    Directory of Open Access Journals (Sweden)

    V. M. Rukhlinskiy

    2014-01-01

    Full Text Available This article considers the problem of assessment of data authenticity related to reliability of the flight data obtained in processing the information of portable GPS receivers’ during air accident investigations, which are characterized by the lack of standard flight data recording systems. Appropriate recommendations the improvement improving of the newly developed GPS receivers have been developed and implemented.

  15. Markerless motion capture can provide reliable 3D gait kinematics in the sagittal and frontal plane

    DEFF Research Database (Denmark)

    Sandau, Martin; Koblauch, Henrik; Moeslund, Thomas B.

    2014-01-01

    Estimating 3D joint rotations in the lower extremities accurately and reliably remains unresolved in markerless motion capture, despite extensive studies in the past decades. The main problems have been ascribed to the limited accuracy of the 3D reconstructions. Accordingly, the purpose of the pr...

  16. Using dynamic factor analysis to provide insights into data reliability in experience sampling studies.

    Science.gov (United States)

    Fuller-Tyszkiewicz, Matthew; Hartley-Clark, Linda; Cummins, Robert A; Tomyn, Adrian J; Weinberg, Melissa K; Richardson, Ben

    2017-09-01

    The past 2 decades have seen increasing use of experience sampling methods (ESMs) to gain insights into the daily experience of affective states (e.g., its variability, as well as antecedents and consequences of temporary shifts in affect). Much less attention has been given to methodological challenges, such as how to ensure reliability of test scores obtained using ESM. The present study demonstrates the use of dynamic factor analysis (DFA) to quantify reliability of test scores in ESM contexts, evaluates the potential impact of unreliable test scores, and seeks to identify characteristics of individuals that may account for their unreliable test scores. One hundred twenty-seven participants completed baseline measures (demographics and personality traits), followed by a 7-day ESM phase in which positive and negative state affect were measured up to 6 times per day. Analyses showed that although at the sample level, scores on these affect measures exhibited adequate levels of reliability, up to one third of participants failed to meet conventional standards of reliability. Where these low reliability estimates were not significantly associated with personality factors, they could-in some cases-be explained by model misspecification where a meaningful alternative structure was available. Despite these potential differences in factor structure across participants, subsequent modeling with and without these "unreliable" cases showed similar substantive results. Hence, the present findings suggest typical analyses based on ESM data may be robust to individual differences in data structure and/or quality. Ways to augment the DFA approach to better understand unreliable cases are discussed. (PsycINFO Database Record (c) 2017 APA, all rights reserved).

  17. Markerless motion capture can provide reliable 3D gait kinematics in the sagittal and frontal plane.

    Science.gov (United States)

    Sandau, Martin; Koblauch, Henrik; Moeslund, Thomas B; Aanæs, Henrik; Alkjær, Tine; Simonsen, Erik B

    2014-09-01

    Estimating 3D joint rotations in the lower extremities accurately and reliably remains unresolved in markerless motion capture, despite extensive studies in the past decades. The main problems have been ascribed to the limited accuracy of the 3D reconstructions. Accordingly, the purpose of the present study was to develop a new approach based on highly detailed 3D reconstructions in combination with a translational and rotational unconstrained articulated model. The highly detailed 3D reconstructions were synthesized from an eight camera setup using a stereo vision approach. The subject specific articulated model was generated with three rotational and three translational degrees of freedom for each limb segment and without any constraints to the range of motion. This approach was tested on 3D gait analysis and compared to a marker based method. The experiment included ten healthy subjects in whom hip, knee and ankle joint were analysed. Flexion/extension angles as well as hip abduction/adduction closely resembled those obtained from the marker based system. However, the internal/external rotations, knee abduction/adduction and ankle inversion/eversion were less reliable. Copyright © 2014 IPEM. Published by Elsevier Ltd. All rights reserved.

  18. THE SIMULATION DIAGNOSTIC METHODS AND REGENERATION WAYS OF REINFORCED - CONCRETE CONSTRUCTIONS OF BRIDGES IN PROVIDING THEIR OPERATING RELIABILITY AND LONGEVITY

    Directory of Open Access Journals (Sweden)

    B. V. Savchinskiy

    2010-03-01

    Full Text Available On the basis of analysis of existing diagnostic methods and regeneration ways of reinforced-concrete constructions of bridges the recommendations on introduction of new modern technologies of renewal of reinforced-concrete constructions of bridges in providing their operating reliability and longevity are offered.

  19. Two rice plasma membrane intrinsic proteins, OsPIP2;4 and OsPIP2;7, are involved in transport and providing tolerance to boron toxicity.

    Science.gov (United States)

    Kumar, Kundan; Mosa, Kareem A; Chhikara, Sudesh; Musante, Craig; White, Jason C; Dhankher, Om Parkash

    2014-01-01

    Boron (B) toxicity is responsible for low cereal crop production in a number of regions worldwide. In this report, we characterized two rice genes, OsPIP2;4 and OsPIP2;7, for their involvement in B permeability and tolerance. Transcript analysis demonstrated that the expression of OsPIP2;4 and OsPIP2;7 were downregulated in shoots and strongly upregulated in rice roots by high B treatment. Expression of both OsPIP2;4 and OsPIP2;7 in yeast HD9 strain lacking Fps1, ACR3, and Ycf1 resulted in an increased B sensitivity. Furthermore, yeast HD9 strain expressing OsPIP2;4 and OsPIP2;7 accumulated significantly higher B as compared to empty vector control, which suggests their involvement in B transport. Overexpression of OsPIP2;4 and OsPIP2;7 in Arabidopsis imparted higher tolerance under B toxicity. Arabidopsis lines overexpressing OsPIP2;4 and OsPIP2;7 showed significantly higher biomass production and greater root length, however there was no difference in B accumulation in long term uptake assay. Short-term uptake assay using tracer B (¹⁰B) in shoots and roots demonstrated increased ¹⁰B accumulation in Arabidopsis lines expressing OsPIP2;4 and OsPIP2;7, compare to wild type control plants. Efflux assay of B in the roots showed that ¹⁰B was effluxed from the Arabidopsis transgenic plants overexpressing OsPIP2;4 or OsPIP2;7 during the initial 1-h of assay. These data indicate that OsPIP2;4 and OsPIP2;7 are involved in mediating B transport in rice and provide tolerance via efflux of excess B from roots and shoot tissues. These genes will be highly useful in developing B tolerant crops for enhanced yield in the areas affected by high B toxicity.

  20. The evidence provided by a single trial is less reliable than its statistical analysis suggests.

    NARCIS (Netherlands)

    Borm, G.F.; Lemmers, F.A.M.O.; Fransen, J.; Donders, A.R.T.

    2009-01-01

    OBJECTIVE: To investigate whether a single trial can provide sufficiently robust evidence to warrant clinical implementation of its results. Trial-specific factors, such as subject selection, study design, and execution strategy, have an impact on the outcome of trials. In multiple trials, they may

  1. Citizen science provides a reliable and scalable tool to track disease-carrying mosquitoes.

    Science.gov (United States)

    Palmer, John R B; Oltra, Aitana; Collantes, Francisco; Delgado, Juan Antonio; Lucientes, Javier; Delacour, Sarah; Bengoa, Mikel; Eritja, Roger; Bartumeus, Frederic

    2017-10-24

    Recent outbreaks of Zika, chikungunya and dengue highlight the importance of better understanding the spread of disease-carrying mosquitoes across multiple spatio-temporal scales. Traditional surveillance tools are limited by jurisdictional boundaries and cost constraints. Here we show how a scalable citizen science system can solve this problem by combining citizen scientists' observations with expert validation and correcting for sampling effort. Our system provides accurate early warning information about the Asian tiger mosquito (Aedes albopictus) invasion in Spain, well beyond that available from traditional methods, and vital for public health services. It also provides estimates of tiger mosquito risk comparable to those from traditional methods but more directly related to the human-mosquito encounters that are relevant for epidemiological modelling and scalable enough to cover the entire country. These results illustrate how powerful public participation in science can be and suggest citizen science is positioned to revolutionize mosquito-borne disease surveillance worldwide.

  2. Can high resolution 3D topographic surveys provide reliable grain size estimates in gravel bed rivers?

    Science.gov (United States)

    Pearson, E.; Smith, M. W.; Klaar, M. J.; Brown, L. E.

    2017-09-01

    High resolution topographic surveys such as those provided by Structure-from-Motion (SfM) contain a wealth of information that is not always exploited in the generation of Digital Elevation Models (DEMs). In particular, several authors have related sub-metre scale topographic variability (or 'surface roughness') to sediment grain size by deriving empirical relationships between the two. In fluvial applications, such relationships permit rapid analysis of the spatial distribution of grain size over entire river reaches, providing improved data to drive three-dimensional hydraulic models, allowing rapid geomorphic monitoring of sub-reach river restoration projects, and enabling more robust characterisation of riverbed habitats. However, comparison of previously published roughness-grain-size relationships shows substantial variability between field sites. Using a combination of over 300 laboratory and field-based SfM surveys, we demonstrate the influence of inherent survey error, irregularity of natural gravels, particle shape, grain packing structure, sorting, and form roughness on roughness-grain-size relationships. Roughness analysis from SfM datasets can accurately predict the diameter of smooth hemispheres, though natural, irregular gravels result in a higher roughness value for a given diameter and different grain shapes yield different relationships. A suite of empirical relationships is presented as a decision tree which improves predictions of grain size. By accounting for differences in patch facies, large improvements in D50 prediction are possible. SfM is capable of providing accurate grain size estimates, although further refinement is needed for poorly sorted gravel patches, for which c-axis percentiles are better predicted than b-axis percentiles.

  3. Reliability of environmental and occupational exposure data provided by surrogate respondents in a case-control study of Parkinson's disease.

    Science.gov (United States)

    Wang, F L; Semchuk, K M; Love, E J

    1994-07-01

    This study used data provided by 40 non-demented Parkinson's disease patients and 101 community controls, and by their 110 spouses and 31 adult children to assess the reliability of surrogate-provided rural environmental and occupational exposure information on the index subjects. The level of overall raw agreement between the index subjects and the spouse or adult child surrogates varied from 50.0 to 100.0% for the case-surrogate group and from 80.6 to 96.0% for the control-surrogate group. We did not detect significant differences in overall raw agreement between the case-surrogate and control-surrogate groups or between the spouse-surrogate and adult child-surrogate groups, for any of the variables studied. Considering all index subjects and their surrogates, the level of overall raw agreement was 80.3% for well water consumption, 82.3% for farm living, 85.8% for agricultural work, 87.1% for use of pesticides, 87.9% for field crop farming and 91.9% for use of fertilizers. However, the kappa estimates were lower, varying from 0.48 (SE = 0.20) for fertilizer use to 0.66 (SE = 0.11) for crop farming. The level of specific agreement was 52.2% for fertilizer use, 64.0% for pesticide use, 71.4% for agricultural work, 73.9% for crop farming, 80.9% for farm living, and 83.6% for well water consumption. The overall findings of this study support the use, if necessary, of spouses and adult children of index subjects as surrogate respondents in case-control studies of rural environment and occupational exposures and Parkinson's disease and, possibly, other neurologic diseases. Specific agreement seems to be a better index of reliability than overall agreement in studies where exposure is rare.

  4. reliability reliability

    African Journals Online (AJOL)

    eobe

    In this work, a FORTRAN-based computer computer. Eurocode 2 (EC 2)[1] ... addresses addresses: 1 idrcivil1@yahoo.com, 2 adomaarf1@gmail.com computer computer program was developed to aid the design of reinforced co program was ..... Haldar, A. and Mahadevan, S. Reliability Assessment using Stochastic Finite ...

  5. Mixed Matrix Method Provides A Reliable Metabolite Exposure Comparison for Assessment of Metabolites in Safety Testing (MIST).

    Science.gov (United States)

    Takahashi, Ryan H; Khojasteh, Cyrus; Wright, Matthew; Hop, Cornelis E C A; Ma, Shuguang

    2017-11-17

    The regulatory guidances on metabolites in safety testing (MIST) by US Food and Drug Administration (FDA) and International Conference on Harmonisation (ICH) describe the necessity to assess exposures of major circulating metabolites in humans at steady state relative to exposures achieved in nonclinical safety studies prior to the initiation of large scale clinical trials. This comparison can be accomplished by measuring metabolite concentrations in animals and humans with validated bioanalytical methods. However, bioanalysis of metabolites in multiple species and multiple studies is resource intensive and may impact the timelines of clinical studies. A simple, reliable and accurate method has been developed for quantitative assessment of metabolite coverage in preclinical safety species by mixing equal volume of human plasma with blank plasma of animal species and vice versa followed by an analysis using LC-SRM or LC-HRMS. Here, we explored the reliability and accuracy of this method in several development projects at Genentech and compared the results to those obtained from validated bioanalytical methods. The mixed-matrix method provided comparable accuracy (within ±20%) to those obtained from validated bioanalysis but does not require authentic standards or radiolabeled compounds, which could translate to time and resource savings in drug development. Quantitative assessment of metabolite coverage in safety species can be made using mixed matrix method with similar accuracy and scientific rigor to those obtained from validated bioanalytical methods. Moving forward, we are encouraging the industry and regulators to consider accepting the mixed matrix method for assessing metabolite exposure comparisons between humans and animal species used in toxicology studies. Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.org.

  6. Providing Reliability Services through Demand Response: A Prelimnary Evaluation of the Demand Response Capabilities of Alcoa Inc.

    Energy Technology Data Exchange (ETDEWEB)

    Starke, Michael R [ORNL; Kirby, Brendan J [ORNL; Kueck, John D [ORNL; Todd, Duane [Alcoa; Caulfield, Michael [Alcoa; Helms, Brian [Alcoa

    2009-02-01

    Demand response is the largest underutilized reliability resource in North America. Historic demand response programs have focused on reducing overall electricity consumption (increasing efficiency) and shaving peaks but have not typically been used for immediate reliability response. Many of these programs have been successful but demand response remains a limited resource. The Federal Energy Regulatory Commission (FERC) report, 'Assessment of Demand Response and Advanced Metering' (FERC 2006) found that only five percent of customers are on some form of demand response program. Collectively they represent an estimated 37,000 MW of response potential. These programs reduce overall energy consumption, lower green house gas emissions by allowing fossil fuel generators to operate at increased efficiency and reduce stress on the power system during periods of peak loading. As the country continues to restructure energy markets with sophisticated marginal cost models that attempt to minimize total energy costs, the ability of demand response to create meaningful shifts in the supply and demand equations is critical to creating a sustainable and balanced economic response to energy issues. Restructured energy market prices are set by the cost of the next incremental unit of energy, so that as additional generation is brought into the market, the cost for the entire market increases. The benefit of demand response is that it reduces overall demand and shifts the entire market to a lower pricing level. This can be very effective in mitigating price volatility or scarcity pricing as the power system responds to changing demand schedules, loss of large generators, or loss of transmission. As a global producer of alumina, primary aluminum, and fabricated aluminum products, Alcoa Inc., has the capability to provide demand response services through its manufacturing facilities and uniquely through its aluminum smelting facilities. For a typical aluminum smelter

  7. Low-magnification image analysis of Giemsa stained, electroporation and bleomycin treated endothelial monolayers provides reliable monolayer integrity data.

    Science.gov (United States)

    Meulenberg, Cécil J W; Cemazar, Maja

    2014-06-01

    The aim of this study was to develop an in vitro cell model for studying the in vivo observed vascular effect, induced by exposing blood vessels to changing electric field strengths. Human microvascular endothelial cells (HMEC-1) were cultured as monolayers on 8 chamber glass slides as a model of capillary wall. Exposed to electric pulses alone, or in the presence of bleomycin (electrochemotherapy), monolayers were incubated with culture medium, fixed with methanol, stained with Giemsa, and photographed. Images of high-contrast low-magnification monolayers made under identical optimal light exposure were converted to greyscale, and the use of a threshold tool yielded a binary distribution, from which we determined two parameters of monolayer integrity: the covered surface area and the number of cells. We show that this low-magnification image analysis method for attached endothelial cells provides reliable control parameters of monolayer integrity, representing capillary wall. Besides, already within 2h post-treatment the data show distinct effects in the monolayer integrity parameters for electric pulses alone, or in the presence of bleomycin. The present method can be readily introduced to short and long-term toxicity assays with a variety of treatment conditions. Copyright © 2014 Elsevier Ltd. All rights reserved.

  8. Transcutaneous PTCCO2 measurement in combination with arterial blood gas analysis provides superior accuracy and reliability in ICU patients.

    Science.gov (United States)

    Spelten, Oliver; Fiedler, Fritz; Schier, Robert; Wetsch, Wolfgang A; Hinkelbein, Jochen

    2017-02-01

    Hyper or hypoventilation may have serious clinical consequences in critically ill patients and should be generally avoided, especially in neurosurgical patients. Therefore, monitoring of carbon dioxide partial pressure by intermittent arterial blood gas analysis (PaCO2) has become standard in intensive care units (ICUs). However, several additional methods are available to determine PCO2 including end-tidal (PETCO2) and transcutaneous (PTCCO2) measurements. The aim of this study was to compare the accuracy and reliability of different methods to determine PCO2 in mechanically ventilated patients on ICU. After approval of the local ethics committee PCO2 was determined in n = 32 ICU consecutive patients requiring mechanical ventilation: (1) arterial PaCO2 blood gas analysis with Radiometer ABL 625 (ABL; gold standard), (2) arterial PaCO2 analysis with Immediate Response Mobile Analyzer (IRMA), (3) end-tidal PETCO2 by a Propaq 106 EL monitor and (4) transcutaneous PTCCO2 determination by a Tina TCM4. Bland-Altman method was used for statistical analysis; p analysis revealed good correlation between PaCO2 by IRMA and ABL (R2 = 0.766; p analysis revealed a bias and precision of 2.0 ± 3.7 mmHg for the IRMA, 2.2 ± 5.7 mmHg for transcutaneous, and -5.5 ± 5.6 mmHg for end-tidal measurement. Arterial CO2 partial pressure by IRMA (PaCO2) and PTCCO2 provided greater accuracy compared to the reference measurement (ABL) than the end-tidal CO2 measurements in critically ill in mechanically ventilated patients patients.

  9. A reliable bioassay procedure to evaluate per os toxicity of Bacillus thuringiensis strains against the rice delphacid, Tagosodes orizicolus (Homoptera: Delphacidae).

    Science.gov (United States)

    Mora, Rebeca; Ibarra, Jorge E; Espinoza, Ana M

    2007-06-01

    A reliable bioassay procedure was developed to test ingested Bacillus thuringiensis (Bt) toxins on the rice delphacid Tagosodes orizicolus. Initially, several colonies were established under greenhouse conditions, using rice plants to nurture the insect. For the bioassay, an in vitro feeding system was developed for third to fourth instar nymphs. Insects were fed through Parafilm membranes on sugar (10 % sucrose) and honey bee (1:48 vol/vol) solutions, observing a natural mortality of 10-15 % and 0-5 %, respectively. Results were reproducible under controlled conditions during the assay (18+/-0.1 degrees C at night and 28+/-0.1 degrees C during the day, 80 % RH and a 12:12 day:light photoperiod). In addition, natural mortality was quantified on insect colonies, collected from three different geographic areas of Costa Rica, with no significant differences between colonies under controlled conditions. Finally, bioassays were performed to evaluate the toxicity of a Bt collection on T. orizicolus. A preliminary sample of twenty-seven Bt strains was evaluated on coarse bioassays using three loops of sporulated colonies in 9 ml of liquid diet, the strains that exhibited higher percentages of T. orizicolus mortality were further analyzed in bioassays using lyophilized spores and crystals (1 mg/ml). As a result, strains 26-O-to, 40-X-m, 43-S-d and 23-O-to isolated from homopteran insects showed mortalities of 74, 96, 44 and 82% respectively while HD-137, HD-1 and Bti showed 19, 83 and 95% mortalities. Controls showed mortalities between 0 and 10% in all bioassays. This is the first report of a reliable bioassay procedure to evaluate per os toxicity for a homopteran species using Bacillus thuringiensis strains.

  10. A reduced factor structure for the PROQOL-HIV questionnaire provided reliable indicators of health-related quality of life.

    Science.gov (United States)

    Lalanne, Christophe; Chassany, Olivier; Carrieri, Patrizia; Marcellin, Fabienne; Armstrong, Andrew R; Lert, France; Spire, Bruno; Dray-Spira, Rosemary; Duracinsky, Martin

    2016-04-01

    To identify a simplified factor structure for the PROQOL-human immunodeficiency virus (HIV) questionnaire to improve the measurement of the health-related quality of life (HRQL) of HIV-positive patients in clinical care and research settings. HRQL data were collected using the eight-dimension PROQOL-HIV questionnaire from 2,537 patients (VESPA2 study). Exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) validated a simpler four-factor structure and assessed measurement invariance (MI). Multigroup analysis assessed the effect of sex, age, and antiretroviral therapy (ART) on the resulting factor scores. Correlations with symptom and Short Form (SF)-12 self-reports assessed convergent validity. Item analysis, EFA, and CFAs confirmed the validity [comparative fit index (CFI), 0.948; root mean square error of approximation, 0.064] and reliability (α's ≥ 0.8) of four dimensions: physical health and symptoms, health concerns and mental distress, social and intimate relationships, and treatment-related impact. Strong MI was demonstrated across sex and age (decrease in CFI indicator model indicated that HRQL correlated as expected with sex, age, and the ART status. Correlations of HRQL, symptom reports, and SF-12 scores evidenced convergent validity criterion. The simplified factor structure and scoring scheme for PROQOL-HIV will allow clinicians to monitor with greater reliability the HRQL of patients in clinical care and research settings. Copyright © 2016 Elsevier Inc. All rights reserved.

  11. Narrow-band imaging provides reliable screening for esophageal malignancy in patients with head and neck cancers.

    Science.gov (United States)

    Takenaka, Ryuta; Kawahara, Yoshiro; Okada, Hiroyuki; Hori, Keisuke; Inoue, Masafumi; Kawano, Seiji; Tanioka, Daisuke; Tsuzuki, Takao; Uemura, Masayuki; Ohara, Nobuya; Tominaga, Susumu; Onoda, Tomoo; Yamamoto, Kazuhide

    2009-12-01

    The narrow-band imaging (NBI) system is a novel technology that enhances the visualization of microvasculature and mucosal patterns. The aim of this study was to assess the reliability of the NBI system for esophageal cancer screening in patients with head and neck cancers. A total of 142 patients with head and neck squamous cell carcinoma (SCC) were examined by NBI endoscopy, followed by Lugol chromoendoscopy between April 2006 and June 2008 at the Okayama University Hospital, Okayama, Japan. Detection of SCC and high-grade intraepithelial neoplasia (HGIN) was conducted. The median age of the patients was 64 years (range: 29-86 years), and approximately three-fourths of all the patients were male. In total, 21 superficial lesions in 16 patients were detected by NBI endoscopy. Of these, 4 lesions were diagnosed histologically as SCC and 11 lesions as HGIN. An additional 22 Lugol-voiding lesions >or=5 mm were detected in 19 patients by Lugol chromoendoscopy. Although 1 of these lesions was diagnosed as HGIN, 21 lesions were diagnosed as low-grade intraepithelial neoplasia or lesions without atypical findings. The sensitivity of NBI endoscopy for detecting esophageal SCC and HGIN was 90.9% (95% confidence interval (CI), 58.7-99.8), specificity was 95.4% (95% CI, 90.3-98.3), and accuracy was 95.1% (95% CI, 90.1-98.0). NBI seems to be useful and reliable for screening for esophageal SCC in patients with head and neck cancers.

  12. MEMS reliability

    CERN Document Server

    Hartzell, Allyson L; Shea, Herbert R

    2010-01-01

    This book focuses on the reliability and manufacturability of MEMS at a fundamental level. It demonstrates how to design MEMs for reliability and provides detailed information on the different types of failure modes and how to avoid them.

  13. Intraclass reliability for assessing how well Taiwan constrained hospital-provided medical services using statistical process control chart techniques

    Directory of Open Access Journals (Sweden)

    Chien Tsair-Wei

    2012-05-01

    Full Text Available Abstract Background Few studies discuss the indicators used to assess the effect on cost containment in healthcare across hospitals in a single-payer national healthcare system with constrained medical resources. We present the intraclass correlation coefficient (ICC to assess how well Taiwan constrained hospital-provided medical services in such a system. Methods A custom Excel-VBA routine to record the distances of standard deviations (SDs from the central line (the mean over the previous 12 months of a control chart was used to construct and scale annual medical expenditures sequentially from 2000 to 2009 for 421 hospitals in Taiwan to generate the ICC. The ICC was then used to evaluate Taiwan’s year-based convergent power to remain unchanged in hospital-provided constrained medical services. A bubble chart of SDs for a specific month was generated to present the effects of using control charts in a national healthcare system. Results ICCs were generated for Taiwan’s year-based convergent power to constrain its medical services from 2000 to 2009. All hospital groups showed a gradually well-controlled supply of services that decreased from 0.772 to 0.415. The bubble chart identified outlier hospitals that required investigation of possible excessive reimbursements in a specific time period. Conclusion We recommend using the ICC to annually assess a nation’s year-based convergent power to constrain medical services across hospitals. Using sequential control charts to regularly monitor hospital reimbursements is required to achieve financial control in a single-payer nationwide healthcare system.

  14. Protein Based Molecular Markers Provide Reliable Means to Understand Prokaryotic Phylogeny and Support Darwinian Mode of Evolution

    Directory of Open Access Journals (Sweden)

    Vaibhav eBhandari

    2012-07-01

    Full Text Available The analyses of genome sequences have led to the proposal that lateral gene transfers (LGTs among prokaryotes are so widespread that they disguise the interrelationships among these organisms. This has led to questioning whether the Darwinian model of evolution is applicable to the prokaryotic organisms. In this review, we discuss the usefulness of taxon-specific molecular markers such as conserved signature indels (CSIs and conserved signature proteins (CSPs for understanding the evolutionary relationships among prokaryotes and to assess the influence of LGTs on prokaryotic evolution. The analyses of genomic sequences have identified large numbers of CSIs and CSPs that are unique properties of different groups of prokaryotes ranging from phylum to genus levels. The species distribution patterns of these molecular signatures strongly support a tree-like vertical inheritance of the genes containing these molecular signatures that is consistent with phylogenetic trees. Recent detailed studies in this regard on Thermotogae and Archaea, which are reviewed here, have identified large numbers of CSIs and CSPs that are specific for the species from these two taxa and a number of their major clades. The genetic changes responsible for these CSIs (and CSPs initially likely occurred in the common ancestors of these taxa and then vertically transferred to various descendants. Although some CSIs and CSPs in unrelated groups of prokaryotes were identified, their small numbers and random occurrence has no apparent influence on the consistent tree-like branching pattern emerging from other markers. These results provide evidence that although LGT is an important evolutionary force, it does not mask the tree-like branching pattern of prokaryotes or understanding of their evolutionary relationships. The identified CSIs and CSPs also provide novel and highly specific means for identification of different groups of microbes and for taxonomical and biochemical

  15. Intraclass reliability for assessing how well Taiwan constrained hospital-provided medical services using statistical process control chart techniques.

    Science.gov (United States)

    Chien, Tsair-Wei; Chou, Ming-Ting; Wang, Wen-Chung; Tsai, Li-Shu; Lin, Weir-Sen

    2012-05-15

    Few studies discuss the indicators used to assess the effect on cost containment in healthcare across hospitals in a single-payer national healthcare system with constrained medical resources. We present the intraclass correlation coefficient (ICC) to assess how well Taiwan constrained hospital-provided medical services in such a system. A custom Excel-VBA routine to record the distances of standard deviations (SDs) from the central line (the mean over the previous 12 months) of a control chart was used to construct and scale annual medical expenditures sequentially from 2000 to 2009 for 421 hospitals in Taiwan to generate the ICC. The ICC was then used to evaluate Taiwan's year-based convergent power to remain unchanged in hospital-provided constrained medical services. A bubble chart of SDs for a specific month was generated to present the effects of using control charts in a national healthcare system. ICCs were generated for Taiwan's year-based convergent power to constrain its medical services from 2000 to 2009. All hospital groups showed a gradually well-controlled supply of services that decreased from 0.772 to 0.415. The bubble chart identified outlier hospitals that required investigation of possible excessive reimbursements in a specific time period. We recommend using the ICC to annually assess a nation's year-based convergent power to constrain medical services across hospitals. Using sequential control charts to regularly monitor hospital reimbursements is required to achieve financial control in a single-payer nationwide healthcare system.

  16. Line Transect and Triangulation Surveys Provide Reliable Estimates of the Density of Kloss' Gibbons (Hylobates klossii) on Siberut Island, Indonesia.

    Science.gov (United States)

    Höing, Andrea; Quinten, Marcel C; Indrawati, Yohana Maria; Cheyne, Susan M; Waltert, Matthias

    2013-02-01

    Estimating population densities of key species is crucial for many conservation programs. Density estimates provide baseline data and enable monitoring of population size. Several different survey methods are available, and the choice of method depends on the species and study aims. Few studies have compared the accuracy and efficiency of different survey methods for large mammals, particularly for primates. Here we compare estimates of density and abundance of Kloss' gibbons (Hylobates klossii) using two of the most common survey methods: line transect distance sampling and triangulation. Line transect surveys (survey effort: 155.5 km) produced a total of 101 auditory and visual encounters and a density estimate of 5.5 gibbon clusters (groups or subgroups of primate social units)/km(2). Triangulation conducted from 12 listening posts during the same period revealed a similar density estimate of 5.0 clusters/km(2). Coefficients of variation of cluster density estimates were slightly higher from triangulation (0.24) than from line transects (0.17), resulting in a lack of precision in detecting changes in cluster densities of triangulation and triangulation method also may be appropriate.

  17. A reliable bioassay procedure to evaluate per os toxicity of Bacillus thuringiensis strains against the rice delphacid, Tagosodes orizicolus (Homoptera: Delphacidae

    Directory of Open Access Journals (Sweden)

    Rebeca Mora

    2007-06-01

    Full Text Available A reliable bioassay procedure was developed to test ingested Bacillus thuringiensis (Bt toxins on the rice delphacid Tagosodes orizicolus. Initially, several colonies were established under greenhouse conditions, using rice plants to nurture the insect. For the bioassay, an in vitro feeding system was developed for third to fourth instar nymphs. Insects were fed through Parafilm membranes on sugar (10 % sucrose and honey bee (1:48 vol/vol solutions, observing a natural mortality of 10-15 % and 0-5 %, respectively. Results were reproducible under controlled conditions during the assay (18±0.1 °C at night and 28±0.1 °C during the day, 80 % RH and a 12:12 day:light photoperiod. In addition, natural mortality was quantified on insect colonies, collected from three different geographic areas of Costa Rica, with no significant differences between colonies under controlled conditions. Finally, bioassays were performed to evaluate the toxicity of a Bt collection on T. orizicolus. A preliminary sample of twenty-seven Bt strains was evaluated on coarse bioassays using three loops of sporulated colonies in 9 ml of liquid diet, the strains that exhibited higher percentages of T. orizicolus mortality were further analyzed in bioassays using lyophilized spores and crystals (1 mg/ml. As a result, strains 26-O-to, 40-X-m, 43S-d and 23-O-to isolated from homopteran insects showed mortalities of 74, 96, 44 and 82 % respectively while HD-137, HD-1 and Bti showed 19, 83 and 95 % mortalities. Controls showed mortalities between 0 and 10 % in all bioassays. This is the first report of a reliable bioassay procedure to evaluate per os toxicity for a homopteran species using Bacillus thuringiensis strains. Rev. Biol. Trop. 55 (2: 373-383. Epub 2007 June, 29.Se desarrolló una metodología de bioensayo para evaluar toxinas de Bacillus thuringiensis (Bt ingeridas por Tagosodes orizicolus, plaga del arroz y vector del virus de la hoja blanca. Se establecieron colonias

  18. A treatment schedule of conventional physical therapy provided to enhance upper limb sensorimotor recovery after stroke: expert criterion validity and intra-rater reliability.

    Science.gov (United States)

    Donaldson, Catherine; Tallis, Raymond C; Pomeroy, Valerie M

    2009-06-01

    Inadequate description of treatment hampers progress in stroke rehabilitation. To develop a valid, reliable, standardised treatment schedule of conventional physical therapy provided for the paretic upper limb after stroke. Eleven neurophysiotherapists participated in the established methodology: semi-structured interviews, focus groups and piloting a draft treatment schedule in clinical practice. Different physiotherapists (n=13) used the treatment schedule to record treatment given to stroke patients with mild, moderate and severe upper limb paresis. Rating of adequacy of the treatment schedule was made using a visual analogue scale (0 to 100mm). Mean (95% confidence interval) visual analogue scores were calculated (expert criterion validity). For intra-rater reliability, each physiotherapist observed a video tape of their treatment and immediately completed a treatment schedule recording form on two separate occasions, 4 to 6 weeks apart. The Kappa statistic was calculated for intra-rater reliability. The treatment schedule consists of a one-page A4 recording form and a user booklet, detailing 50 treatment activities. Expert criterion validity was 79 (95% confidence interval 74 to 84). Intra-rater Kappa was 0.81 (P<0.001). This treatment schedule can be used to document conventional physical therapy in subsequent clinical trials in the geographical area of its development. Further work is needed to investigate generalisability beyond this geographical area.

  19. A case study review of technical and technology issues for transition of a utility load management program to provide system reliability resources in restructured electricity markets

    Energy Technology Data Exchange (ETDEWEB)

    Weller, G.H.

    2001-07-15

    Utility load management programs--including direct load control and interruptible load programs--were employed by utilities in the past as system reliability resources. With electricity industry restructuring, the context for these programs has changed; the market that was once controlled by vertically integrated utilities has become competitive, raising the question: can existing load management programs be modified so that they can effectively participate in competitive energy markets? In the short run, modified and/or improved operation of load management programs may be the most effective form of demand-side response available to the electricity system today. However, in light of recent technological advances in metering, communication, and load control, utility load management programs must be carefully reviewed in order to determine appropriate investments to support this transition. This report investigates the feasibility of and options for modifying an existing utility load management system so that it might provide reliability services (i.e. ancillary services) in the competitive markets that have resulted from electricity industry restructuring. The report is a case study of Southern California Edison's (SCE) load management programs. SCE was chosen because it operates one of the largest load management programs in the country and it operates them within a competitive wholesale electricity market. The report describes a wide range of existing and soon-to-be-available communication, control, and metering technologies that could be used to facilitate the evolution of SCE's load management programs and systems to provision of reliability services. The fundamental finding of this report is that, with modifications, SCE's load management infrastructure could be transitioned to provide critical ancillary services in competitive electricity markets, employing currently or soon-to-be available load control technologies.

  20. A reliable bioassay procedure to evaluate per os toxicity of Bacillus thuringiensis strains against the rice delphacid, Tagosodes orizicolus (Homoptera: Delphacidae)

    OpenAIRE

    Mora, Rebeca; E. Ibarra, Jorge; M. Espinoza, Ana

    2006-01-01

    A reliable bioassay procedure was developed to test ingested Bacillus thuringiensis (Bt) toxins on the rice delphacid Tagosodes orizicolus. Initially, several colonies were established under greenhouse conditions, using rice plants to nurture the insect. For the bioassay, an in vitro feeding system was developed for third to fourth instar nymphs. Insects were fed through Parafilm membranes on sugar (10 % sucrose) and honey bee (1:48 vol/vol) solutions, observing a natural mortality of 10-15 %...

  1. Can simple mobile phone applications provide reliable counts of respiratory rates in sick infants and children? An initial evaluation of three new applications.

    Science.gov (United States)

    Black, James; Gerdtz, Marie; Nicholson, Pat; Crellin, Dianne; Browning, Laura; Simpson, Julie; Bell, Lauren; Santamaria, Nick

    2015-05-01

    applications found. This study provides evidence that applications running on simple phones can be used to count respiratory rates in children. The Once-per-Breath methods are the most reliable, outperforming the 60-second count. For children with raised respiratory rates the 20-breath version of the Once-per-Breath method is faster, so it is a more suitable option where health workers are under time pressure. Copyright © 2015 Elsevier Ltd. All rights reserved.

  2. Reliability and Validity of Kurdish Language Version of Health Promoting Lifestyle Profile II among Kurdish Healthcare Providers Kurdish Version of HPLP-II.

    Science.gov (United States)

    Kamali, Aram Salih Mohammed Amin; Sadeghi, Roya; Tol, Azar; Yaseri, Mahdi

    2016-12-01

    Unhealthy lifestyles pose significant threat to public health. This study aimed to assess the validity and reliability of a Kurdish version of the HPLP-II instrument among Kurdish healthcare providers, whose society and culture differ from that of North America and Spain, where the instrument was developed. The instrument was translated into Kurdish, back translated, and pilot tested to ascertain cultural sensitivity. It was then evaluated using a convenience sample of 460 healthcare providers in the Kurdistan region, northern Iraq using a principal components factor analysis. The order of factors was entirely identical to those isolated previously during the psychometric assessment of the English language version. The majority of our study participants were male (55%). In addition, 39.2% of participants were nurses. In addition, 42% of participants had less than five years of working experience. Furthermore, 82.1% of our study population held a high school diploma. The mean (SE) of Physical Activities dimension was low (15.3 ± 4.8) compared to Spiritual Growth dimension (24.5 ± 4.4). Moreover, the Cronbach's alpha coefficient for the overall HPLP-II questionnaire was 0.870; however, the nutrition dimension was low (0.622) compared to Physical Activities dimension (0.792). Furthermore, the correlation between items ranged from 0.099 to 0.611. The Kurdish version of the HPLP-II demonstrated initial reliability and validity. It is a precious tool to evaluate and assess lifestyle and lifestyle interventions built to improve the health of Kurds.

  3. Reliability of EP3OS symptom criteria and nasal endoscopy in the assessment of chronic rhinosinusitis - a GA(2) LEN study

    DEFF Research Database (Denmark)

    Tomassen, P; Newson, R B; Hoffmans, R

    2011-01-01

    endoscopy in the assessment of chronic rhinosinusitis - a GA(2) LEN study. Allergy 2010; DOI: 10.1111/j.1398-9995.2010.02503.x. ABSTRACT: Background:  The European Position Paper on Rhinosinusitis and Nasal Polyps (EP3OS) incorporates symptomatic, endoscopic, and radiologic criteria in the clinical...... determined. In two centers, 342 participants underwent nasal endoscopy. The association of symptom-based CRS with endoscopy and self-reported doctor-diagnosed CRS was assessed. Results:  There was a decrease in prevalence of CRS between the two study phases, and this was consistent across all centers (-3.......0%, 95% CI: -5.0 to -1.0%, I(2)  = 0). There was fair to moderate agreement between the two occasions (kappa = 39.6). Symptom-based CRS was significantly associated with positive endoscopy in nonallergic subjects, and with self-reported doctor-diagnosed CRS in all subjects, irrespective of the presence...

  4. Novel Chitinase Gene LOC_Os11g47510 from Indica Rice Tetep Provides Enhanced Resistance against Sheath Blight Pathogen Rhizoctonia solani in Rice

    Directory of Open Access Journals (Sweden)

    Tilak R. Sharma

    2017-04-01

    Full Text Available Sheath blight disease (ShB, caused by the fungus Rhizoctonia solani Kühn, is one of the most destructive diseases of rice (Oryza sativa L., causing substantial yield loss in rice. In the present study, a novel rice chitinase gene, LOC_Os11g47510 was cloned from QTL region of R. solani tolerant rice line Tetep and used for functional validation by genetic transformation of ShB susceptible japonica rice line Taipei 309 (TP309. The transformants were characterized using molecular and functional approaches. Molecular analysis by PCR using a set of primers specific to CaMv 35S promoter, chitinase and HptII genes confirmed the presence of transgene in transgenic plants which was further validated by Southern hybridization. Further, qRT-PCR analysis of transgenic plants showed good correlation between transgene expression and the level of sheath blight resistance among transformants. Functional complementation assays confirmed the effectiveness of the chitinase mediated resistance in all the transgenic TP309 plants with varying levels of enhanced resistance against R. solani. Therefore, the novel chitinase gene cloned and characterized in the present study from the QTL region of rice will be of significant use in molecular plant breeding program for developing sheath blight resistance in rice.

  5. Culturas migratorias en el Caribe colombiano: El caso de los isleños raizales de las islas de Old Providence y Santa Catalina

    Directory of Open Access Journals (Sweden)

    Ana Isabel Márquez Pérez

    2013-01-01

    Full Text Available Las migraciones caribeñas han sido ampliamente documentadas, especialmente desde visiones económicas y demográficas que enfatizan los aspectos negativos que estas causan en individuos y sociedades. Sin embargo, desde las ciencias humanas se ha difundido el concepto de culturas migratorias para analizarlas . El eje central es que, más allá de un fenómeno de tipo económico, ligado a superpoblación y desempleo , la movilidad caribeña puede entenderse como una tradición cultural que se ha convertido en un modo de vida legitimado por generaciones de migrantes, permitiendo la viabilidad de estas sociedades. Este concepto supone la movilidad constante a manera de migraciones temporales utilizadas como estrategias económicas básicas, así como mecanismos socioculturales que facilitan y perpetúan esta práctica. Este seria el caso de los habitantes de Providencia y Santa Catalina en el territorio de habla inglesa en el Caribe colombiano, quienes poseen una larga historia de migraciones que continúan hasta hoy y que constituyen una forma de vida. Este documento resulta de investigaciones realizadas tanto en las islas como con migrantes en Bogotá, entre 2004 y 2011, en las cuales se abordaron diversos temas, incluyendo el papel de las migraciones en la vida de estos isleños, las memorias y las percepciones sobre las mismas.

  6. Instrumentos da Contabilidade Gerencial utilizados em micro e pequenas empresas comerciais e disponibilizados por empresas de serviços contábeis = Managerial Accounting instruments used in micro and small commercial businesses services provided by accounting services companies

    Directory of Open Access Journals (Sweden)

    Vanderlei dos Santos

    2009-11-01

    Full Text Available O objetivo do estudo é verificar os instrumentos da contabilidade gerencial utilizados em micro e pequenas empresas comerciais na tomada de decisão e a disponibilização desses instrumentos por parte das empresas de serviços contábeis. Realizou-se pesquisa descritiva, de abordagem quantitativa e por meio de uma survey. Para a coleta dos dados foram aplicados dois questionários,um direcionado às empresas comerciais e o outro aos escritórios prestadores de serviços contábeis.De 77 empresas comerciais cadastradas na prefeitura do município de Presidente Getúlio/SC,obteve-se o retorno de 16 delas, constituindo-se assim uma amostra por acessibilidade. Quanto às empresas de serviços contábeis, obteve-se um retorno de 100% da população, totalizando 7 escritórios de contabilidade. Os resultados monstram que os instrumentos da contabilidade gerencial mais utilizados pelas empresas são a formação do preço de venda e o fluxo de caixa,enquanto os menos utilizados são, a análise das demonstrações contábeis e análise do custo/volume/lucro e ponto de equilíbrio. Conclui-se que há necessidade de mudança na relação das micro e pequenas empresas com a contabilidade e o aperfeiçoamento dos serviços oferecidos pelos profissionais das empresas de serviços contábeis.The objective of the study is to examine the instruments of managerial accounting used in microand small commercial businesses in decision making and the availability of these instruments byaccounting services companies. A descriptive research was done using a quantitative approachand a survey. Two questionnaires were applied to collect the data, one directed to commercialenterprises and other to the accounting service providers office. Out of the 77 commercialcompanies registered in President Getúlio / SC city hall, was obtained the return of 16 of them,being a sample of accessibility. As for accounting services companies, we obtained 100% ofreturn from the

  7. A NEaT Design for reliable and scalable network stacks

    NARCIS (Netherlands)

    Hruby, Tomas; Giuffrida, Cristiano; Sambuc, Lionel; Bos, Herbert; Tanenbaum, Andrew S.

    2016-01-01

    Operating systems provide a wide range of services, which are crucial for the increasingly high reliability and scalability demands of modern applications. Providing both reliability and scalability at the same time is hard. Commodity OS architectures simply lack the design abstractions to do so for

  8. ScreenOS Cookbook

    CERN Document Server

    Brunner, Stefan; Delcourt, David

    2008-01-01

    In the only book that completely covers ScreenOS, six key members of Juniper Network's ScreenOS development team help you troubleshoot secure networks using ScreenOS firewall appliances. Over 200 recipes address a wide range of security issues, provide step-by-step solutions, and include discussions of why the recipes work, so you can easily set up and keep ScreenOS systems on track. The easy-to-follow format enables you to find the topic and specific recipe you need right away.

  9. Capital humano e sua relação com o desempenho organizacional em empresas prestadoras de serviços contábeis = Human capital and its relationship with the organizational performance in accounting services providers

    Directory of Open Access Journals (Sweden)

    Suzete Antonieta Lizote

    2017-08-01

    Full Text Available Na atualidade o valor das empresas não pode ser estimado apenas pelos seus ativos tangíveis. A geração e aquisição de conhecimento são fundamentais para a obtenção de vantagens competitivas, pelo que cresce a importância do capital intelectual da organização. Nesse contexto a pesquisa objetiva analisar se o capital humano (CH que as empresas prestadoras de serviços contábeis dispõem se relaciona positivamente com seu desempenho organizacional (DO. Metodologicamente, a pesquisa se caracteriza como quantitativa e de natureza aplicada, com os dados empíricos obtidos com questionário numa amostra intencional. Levantaram-se dados de ambos os constructos e dos respondentes e suas empresas. Os métodos estatísticos foram o teste t e a análise de variância para as comparações de médias. Empregou-se também a análise fatorial exploratória e confirmatória e a modelagem em equações estruturais para avaliar a relação conjecturada. Os resultados obtidos mostraram que os respondentes têm percepções estatisticamente iguais para ambos os constructos ao considerar o gênero e o tipo de gestão que a firma possui, mas houve diferenças para a percepção do desempenho segundo seu tamanho. Empresas maiores declaram ter maior desempenho. A hipótese que o CH se relaciona positiva e significativamente com o DO foi confirmada. Currently the value of companies cannot only be estimated by their tangible assets. The generation and acquisition of knowledge are key for obtaining competitive advantages, reason for which the importance of the intellectual capital of the organization grows. In this context the research aims to analyze whether the human capital (CH held by companies providing accounting services are positively related to their organizational performance (DO. Methodologically, the research is characterized as quantitative and of an applied nature, with the empirical data obtained from a questionnaire in intentional sample. Data

  10. Leveraging Cloud Technology to Provide a Responsive, Reliable and Scalable Backend for the Virtual Ice Sheet Laboratory Using the Ice Sheet System Model and Amazon's Elastic Compute Cloud

    Science.gov (United States)

    Perez, G. L.; Larour, E. Y.; Halkides, D. J.; Cheng, D. L. C.

    2015-12-01

    The Virtual Ice Sheet Laboratory(VISL) is a Cryosphere outreach effort byscientists at the Jet Propulsion Laboratory(JPL) in Pasadena, CA, Earth and SpaceResearch(ESR) in Seattle, WA, and the University of California at Irvine (UCI), with the goal of providing interactive lessons for K-12 and college level students,while conforming to STEM guidelines. At the core of VISL is the Ice Sheet System Model(ISSM), an open-source project developed jointlyat JPL and UCI whose main purpose is to model the evolution of the polar ice caps in Greenland and Antarctica. By using ISSM, VISL students have access tostate-of-the-art modeling software that is being used to conduct scientificresearch by users all over the world. However, providing this functionality isby no means simple. The modeling of ice sheets in response to sea and atmospheric temperatures, among many other possible parameters, requiressignificant computational resources. Furthermore, this service needs to beresponsive and capable of handling burst requests produced by classrooms ofstudents. Cloud computing providers represent a burgeoning industry. With majorinvestments by tech giants like Amazon, Google and Microsoft, it has never beeneasier or more affordable to deploy computational elements on-demand. This isexactly what VISL needs and ISSM is capable of. Moreover, this is a promisingalternative to investing in expensive and rapidly devaluing hardware.

  11. os odontoideum

    African Journals Online (AJOL)

    walk unaided for short distances and has regained some power in both hands. Plain film, computed tomography. (CT) scan and magnetic resonance (MR) ... symptoms and/or neurological signs and C1-2 instabil- ity may be managed with posterior C1-2 internal fixa- tion and fusion.3. Conclusion. Os odontoideum is a ...

  12. os odontoideum

    African Journals Online (AJOL)

    vertebral column and is also the least stable.1 Os odon- toideum frequently leads to atlanto-axial instability with spinal-cord compression.2 Atlanto-axial instability can arise from multiple causes including inflammatory arthritides, trauma, infection, laxity of the transverse ligament, e.g. trisomy 21 and other congenital abnor-.

  13. IS THE CLIENT ALWAYS RIGHT? AN EMOTIONAL APPROACH TO SERVICES PROVIDING O cliente tem sempre razão? Uma abordagem emocional no provimento de serviços

    Directory of Open Access Journals (Sweden)

    Márcia Pitrowsky

    2011-01-01

    Full Text Available

    This essay aims at using the marketing academic frame of reference to present an approach on the emotional interaction processes that surround the supply and delivery of services in general, based on a quick analysis of the principle – not accepted by all service providers – that the client is always right.

    Este ensaio objetiva apresentar, dentro do estado da arte acadêmico do marketing, abordagem sobre a importância do comportamento humano pelo lado emocional nos processos de interação que envolvem a oferta e a entrega de serviços em geral, a partir de avaliação a respeito do princípio – do qual nem todos provedores de serviços compartilham – de que o cliente sempre teria razão.

  14. The Accelerator Reliability Forum

    CERN Document Server

    Lüdeke, Andreas; Giachino, R

    2014-01-01

    A high reliability is a very important goal for most particle accelerators. The biennial Accelerator Reliability Workshop covers topics related to the design and operation of particle accelerators with a high reliability. In order to optimize the over-all reliability of an accelerator one needs to gather information on the reliability of many different subsystems. While a biennial workshop can serve as a platform for the exchange of such information, the authors aimed to provide a further channel to allow for a more timely communication: the Particle Accelerator Reliability Forum [1]. This contribution will describe the forum and advertise it’s usage in the community.

  15. Gearbox Reliability Collaborative Update (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Sheng, S.; Keller, J.; Glinsky, C.

    2013-10-01

    This presentation was given at the Sandia Reliability Workshop in August 2013 and provides information on current statistics, a status update, next steps, and other reliability research and development activities related to the Gearbox Reliability Collaborative.

  16. Abejide, OS

    African Journals Online (AJOL)

    ... Vol 33, No 3 (2014) - Research papers. Reliability Analysis of Bending, Shear and Deflection Criteria of Reinforced Concrete Slabs ... Building, Civil & Geotechical Engineering Effects of Temperature Levels and Concrete Cover Thickness on Residual Strength Characteristics of Fire Exposed Reinforced Concrete Beams

  17. Visual Analogue Scale for Anxiety and Amsterdam Preoperative Anxiety Scale Provide a Simple and Reliable Measurement of Preoperative Anxiety in Patients Undergoing Cardiac Surgery

    Directory of Open Access Journals (Sweden)

    Joaquín Hernández-Palazón

    2015-03-01

    Full Text Available Background: Anxiety is an emotional state characterized by apprehension and fear resulting from anticipation of a threatening event. Objectives: The present study aimed to analyze the incidence and level of preoperative anxiety in the patients scheduled for cardiac surgery by using a Visual Analogue Scale for Anxiety (VAS-A and Amsterdam Preoperative Anxiety and Information Scale (APAIS and to identify the influencing clinical factors. Patients and Methods: This prospective, longitudinal study was performed on 300 cardiac surgery patients in a single university hospital. The patients were assessed regarding their preoperative anxiety level using VAS-A, APAIS, and a set of specific anxiety-related questions. Their demographic features as well as their anesthetic and surgical characteristics (ASA physical status, EuroSCORE, preoperative Length of Stay (LoS, and surgical history were recorded, as well. Then, one-way ANOVA and t-test were applied along with odds ratio for risk assessment. Results: According to the results, 94% of the patients presented preoperative anxiety, with 37% developing high anxiety (VAS-A ≥ 7. Preoperative LoS > 2 days was the only significant risk factor for preoperative anxiety (odds ratio = 2.5, CI 95%, 1.3 - 5.1, P = 0.009. Besides, a positive correlation was found between anxiety level (APAISa and requirement of knowledge (APAISk. APAISa and APAISk scores were greater for surgery than for anesthesia. Moreover, the results showed that the most common anxieties resulted from the operation, waiting for surgery, not knowing what is happening, postoperative pain, awareness during anesthesia, and not awakening from anesthesia. Conclusions: APAIS and VAS-A provided a quantitative assessment of anxiety and a specific qualitative questionnaire for preoperative anxiety in cardiac surgery. According to the results, preoperative LoS > 2 days and lack of information related to surgery were the risk factors for high anxiety levels.

  18. Software reliability

    CERN Document Server

    Bendell, A

    1986-01-01

    Software Reliability reviews some fundamental issues of software reliability as well as the techniques, models, and metrics used to predict the reliability of software. Topics covered include fault avoidance, fault removal, and fault tolerance, along with statistical methods for the objective assessment of predictive accuracy. Development cost models and life-cycle cost models are also discussed. This book is divided into eight sections and begins with a chapter on adaptive modeling used to predict software reliability, followed by a discussion on failure rate in software reliability growth mo

  19. Circuit design for reliability

    CERN Document Server

    Cao, Yu; Wirth, Gilson

    2015-01-01

    This book presents physical understanding, modeling and simulation, on-chip characterization, layout solutions, and design techniques that are effective to enhance the reliability of various circuit units.  The authors provide readers with techniques for state of the art and future technologies, ranging from technology modeling, fault detection and analysis, circuit hardening, and reliability management. Provides comprehensive review on various reliability mechanisms at sub-45nm nodes; Describes practical modeling and characterization techniques for reliability; Includes thorough presentation of robust design techniques for major VLSI design units; Promotes physical understanding with first-principle simulations.

  20. Reliability Calculations

    DEFF Research Database (Denmark)

    Petersen, Kurt Erling

    1986-01-01

    Risk and reliability analysis is increasingly being used in evaluations of plant safety and plant reliability. The analysis can be performed either during the design process or during the operation time, with the purpose to improve the safety or the reliability. Due to plant complexity and safety...... and availability requirements, sophisticated tools, which are flexible and efficient, are needed. Such tools have been developed in the last 20 years and they have to be continuously refined to meet the growing requirements. Two different areas of application were analysed. In structural reliability probabilistic...... approaches have been introduced in some cases for the calculation of the reliability of structures or components. A new computer program has been developed based upon numerical integration in several variables. In systems reliability Monte Carlo simulation programs are used especially in analysis of very...

  1. JUNOS OS For Dummies

    CERN Document Server

    Goralski, Walter J; Bushong, Michael

    2011-01-01

    Learn to use JUNOS to make your network reliable! Providing network administrators with a reliable network operating system, JUNOS software is an award-winning network operating system that focuses on security and the avoidance of down time. This easy-to-understand book starts with the basics of JUNOS and walks you through its features so that you can quickly learn how to set up, operate, and add key services. Since the various JUNOS features are constantly being updated to provide your network with the best security possible, this new edition shares must-know information, helpful advice, hand

  2. Improving machinery reliability

    CERN Document Server

    Bloch, Heinz P

    1998-01-01

    This totally revised, updated and expanded edition provides proven techniques and procedures that extend machinery life, reduce maintenance costs, and achieve optimum machinery reliability. This essential text clearly describes the reliability improvement and failure avoidance steps practiced by best-of-class process plants in the U.S. and Europe.

  3. Reliability Engineering

    CERN Document Server

    Lazzaroni, Massimo

    2012-01-01

    This book gives a practical guide for designers and users in Information and Communication Technology context. In particular, in the first Section, the definition of the fundamental terms according to the international standards are given. Then, some theoretical concepts and reliability models are presented in Chapters 2 and 3: the aim is to evaluate performance for components and systems and reliability growth. Chapter 4, by introducing the laboratory tests, puts in evidence the reliability concept from the experimental point of view. In ICT context, the failure rate for a given system can be

  4. OS X and iOS Kernel Programming

    CERN Document Server

    Halvorsen, Ole Henry

    2011-01-01

    OS X and iOS Kernel Programming combines essential operating system and kernel architecture knowledge with a highly practical approach that will help you write effective kernel-level code. You'll learn fundamental concepts such as memory management and thread synchronization, as well as the I/O Kit framework. You'll also learn how to write your own kernel-level extensions, such as device drivers for USB and Thunderbolt devices, including networking, storage and audio drivers. OS X and iOS Kernel Programming provides an incisive and complete introduction to the XNU kernel, which runs iPhones, i

  5. Escala de avaliação de traços autísticos (ATA: validade e confiabilidade de uma escala para a detecção de condutas artísticas Validity and reliability of a scale for the assessment of austistic behaviour

    Directory of Open Access Journals (Sweden)

    FRANCISCO B. ASSUMPÇÃO JR.

    1999-03-01

    Full Text Available O objetivo deste estudo foi, a partir da análise de uma população de 31 pacientes portadores de deficiência mental e de 30 pacientes diagnosticados como portadores de autismo, conforme os critérios diagnósticos do DSM-IV, traduzir, adaptar e validar a escala de traços autísticos, construída em Barcelona por Ballabriga e colaboradores. O ponto de corte encontrado foi 15 (p= 0,05; o coeficiente de variação (confiabilidade, 0,27; a validade externa mostrou baixa concordância (kappa= 0,04 e a validade interna foi 100%, mostrando que, em todos os pacientes avaliados, os diagnósticos clínicos concordaram com os realizados através da escala. O índice de correlação foi 0,42, mostrando-se específico para os quadros autísticos. Apresentou ainda, capacidade de discriminação e consistência interna, com alfa de Cronbach 0,71 . Consideramos, assim, que a escala mostra-se confiável para a sua utilização em nosso meio.This study aimed to translate, to adapt and to validate the scale of autistic traits (ATA developed by Ballabriga et al. in Barcelona, by the analysis of 31 patients with mental deficiency and 30 patients with autism, according to the DSM-IV criteria. The "cut off point" found was 15 (p= 0.05; the reliability coefficient was 0.27; the construct validity showed low agreement (kappa=0.04 and the internal validity was 100%, with all evaluated patients having their clinical diagnosis confirmed through the scale application. The correlation index was 0.42, showing that it is specific for autism. The scale presents discrimination capacity and internal consistency, and the Cronbach's alpha was 0.71. We consider that achieved results show that the scale is reliable to be used in our population.

  6. O processo saúde-doença e os cuidados com a saúde na perspectiva dos educadores infantis The health-illness process and health care from the perspective of child care providers

    Directory of Open Access Journals (Sweden)

    Damaris Gomes Maranhão

    2000-12-01

    Full Text Available Este artigo apresenta um estudo de caso realizado em creche pública que é administrada por uma entidade filantrópica e atende a população de baixa renda da periferia da cidade de São Paulo. O uso e a organização do espaço, a rotina de cuidados e as regras de higiene adotadas, quando analisadas à luz da antropologia, revelam os valores pelos quais os adultos ordenam o seu mundo social.This article presents a case study of a public daycare center for low-income children in the city of São Paulo. Anthropological analysis focused on the organization and use of space, daily care, and rules of hygiene, reflecting values used by adults to organize social reality.

  7. Calidad de vida de las(os profesionales de enfermería y sus consecuencias en el cuidado Qualidade de vida das(os profissionais da enfermagem e suas conseqüências na atenção Quality of life of nursing professionals and effects for the care they provide

    Directory of Open Access Journals (Sweden)

    MARÍA NUBIA ROMERO B

    2008-12-01

    Full Text Available Las precarias condiciones laborales en las cuales ejercen el y la profesional de enfermería, manifiestas en la pérdida de estabilidad laboral, de prestaciones sociales y de pago de recargos nocturnos y festivos, en el incremento de la jornada laboral y en el escaso tiempo de dedicación al cuidado directo, entre otros, expresan los efectos del modelo neoliberal aplicado al sector salud e impactan negativamente el cuidado y la calidad de vida personal y familiar de los profesionales, porque restringen poderosamente la realización de necesidades para el pleno desarrollo humano. Objetivo: describir e interpretar las condiciones personales, familiares y laborales que configuran la calidad de vida de las y los profesionales de enfermería, y que inciden en el ejercicio del cuidado. Tipo de estudio: descriptivo de corte transversal. La población encuestada correspondió a las y los asistentes al XVI Congreso Nacional de Enfermería realizado en julio de 2005 en Medellín. Resultados: se encuestaron 218 participantes en el congreso. El 73% refiere que en el actual SGSSS (Sistema General de Seguridad Social en Salud la calidad del cuidado ha empeorado; el 49% refiere agotamiento o cansancio psíquico; el 85% considera que con su salario satisface la necesidad de subsistencia de ellas(os y sus familiares; la posibilidad de realizar otras necesidades, como la del entretenimiento, se da solo en un 22%; el ocio, en un 14%, y el afecto, en un escaso 5%. Conclusiones: la calidad de vida de las y los profesionales de enfermería demuestra que la relación entre carencias y potencialidades presenta un desbalance hacia el empobrecimiento en la realización de sus necesidades humanas, relacionado con la escasez de satisfactores positivos en el tener, el estar y el hacer, debido a que los profesionales son vistos como meros recursos y no se trasciende la perspectiva de persona-objeto a persona-sujeto de desarrolloAs precárias condições de trabalho para os

  8. Quality of life of nursing professionals and effects for the care they provide Calidad de vida de las(os profesionales de enfermería y sus consecuencias en el cuidado Qualidade de vida das(os profissionais da enfermagem e suas conseqüências na atenção

    Directory of Open Access Journals (Sweden)

    GALINDO H SOLANYE

    2008-12-01

    Full Text Available The poor labor conditions in which nursing practitioners work, evidenced in the loss of labor stability, employment benefits and no payment of night and holiday work surcharges, increase of working hours and the scarce time dedicated to direct care, among others, shows the effects of the neoliberalism model and impact in a negative way the care and personal and family life of practitioners since all these restrict the fulfillment of needs for the full human development. Objective: to describe and interpret personal, family and labor conditions that configure the nursing practitioners' quality of life and which have an impact on the care they provide. Type of study: descriptive, cross-sectional analysis. The surveyed population was that attending the 16th National Nursing Congress which took place in July 2005 in Medellín. Results: 218 participants were surveyed. 73% reported the quality of care has deteriorated; 49% refers to exhaustion or psychic weariness; 85% considers that their salaries satisfy their basic needs; entertainment is only 22%, free time 14% and affection in a scarce 5%. Conclusions: The quality of life of said practitioners shows that the relationship between deficiencies and potentialities presents an imbalance towards deterioration in satisfying their human needs, related with the lack of positive satisfiers in the having, being and doing, and one does not go beyond the perspective person -object to person -subject.Las precarias condiciones laborales en las cuales ejercen el y la profesional de enfermería, manifiestas en la pérdida de estabilidad laboral, de prestaciones sociales y de pago de recargos nocturnos y festivos, en el incremento de la jornada laboral y en el escaso tiempo de dedicación al cuidado directo, entre otros, expresan los efectos del modelo neoliberal aplicado al sector salud e impactan negativamente el cuidado y la calidad de vida personal y familiar de los profesionales, porque

  9. Reliability in automotive ethernet networks

    DEFF Research Database (Denmark)

    Soares, Fabio L.; Campelo, Divanilson R.; Yan, Ying

    2015-01-01

    This paper provides an overview of in-vehicle communication networks and addresses the challenges of providing reliability in automotive Ethernet in particular.......This paper provides an overview of in-vehicle communication networks and addresses the challenges of providing reliability in automotive Ethernet in particular....

  10. Does multi-slice CT provide reliable attenuation values if measured with low slice thickness and low tube current? Results of a phantom study; Sind mit der Mehrschicht-Computertomografie Dichtemessungen auch bei geringer Schichtdicke und niedrigem Roehrenstrom verlaesslich?

    Energy Technology Data Exchange (ETDEWEB)

    Kirchhof, K.; Bohndorf, K. [Klinik fuer Diagnostische Radiologie und Neuroradiologie, Klinikum Augsburg (Germany); Welzel, T. [Abt. klinische Radiologie, Radiologische Universitaetsklinik Heidelberg (Germany); Wagner, T. [Pathologisches Inst., Klinikum Augsburg (Germany); Behr, W. [Inst. fuer Laboratoriumsmedizin, Mikrobiologie und Umwelthygiene, Klinikum Augsburg (Germany)

    2008-01-15

    Purpose: to test whether CT with low slice thickness and low tube current provides reliable attenuation measurements. Materials and methods: using multi-slice CT and a phantom, we measured the attenuation values of thrombi with different proportions of erythrocytes, using a slice thickness of 1.25 mm, 2.5 mm, and 5 mm with tube currents of 200 mA, 300 mA, and 400 mA and a slice thickness of 0.625 mm with tube currents of 150 mA, 175 mA, and 200 mA. Differences in attenuation values and pixel noise between the three thrombi for tube current and slice thickness were statistically analyzed. Results: the attenuation values of all thrombi increased (p < 0.05) when the slice thickness decreased using a tube current of 200 mA or when the tube current decreased using a slice thickness of 1.25 mm. With higher tube currents and thicker slices, the CT values depended on the type of thrombus and the slice thickness. In slices with a thickness of 0.625 mm, the CT values decreased with the tube current in the mixed thrombus with a low proportion of erythrocytes and in the red thrombus (p < 0.05). The maximal difference in mean attenuation values was 4.3 HU with a slice thickness of 0.625 mm and 2.2 HU with a slice thickness of 1.25 mm. The pixel noise increased as the slice thickness decreased (p < 0.05) with the exception of the red thrombus, if reduced to 0.625 mm. The pixel noise also increased as the tube current decreased (p < 0.05) except in mixed thrombi measured with 0.625 mm. The maximal difference in mean standard deviation was 1.8 HU with a slice thickness of 1.25 mm. (orig.)

  11. Android OS: A Review

    Directory of Open Access Journals (Sweden)

    Przemyslaw Gilski

    2015-02-01

    Full Text Available Due to the technological development, mobile terminals have evolved into functionally sophisticated devices such as smartphones and tablets. The Android platform has become one of the most popular operating system with millions of new users each year. Despite many studies, none have provided a comprehensive description of this operating system. In this paper we present a review of the Android OS. We describe the platforms history including improvements involved in each release as well as the systems architecture and project structure.

  12. The rating reliability calculator

    Directory of Open Access Journals (Sweden)

    Solomon David J

    2004-04-01

    Full Text Available Abstract Background Rating scales form an important means of gathering evaluation data. Since important decisions are often based on these evaluations, determining the reliability of rating data can be critical. Most commonly used methods of estimating reliability require a complete set of ratings i.e. every subject being rated must be rated by each judge. Over fifty years ago Ebel described an algorithm for estimating the reliability of ratings based on incomplete data. While his article has been widely cited over the years, software based on the algorithm is not readily available. This paper describes an easy-to-use Web-based utility for estimating the reliability of ratings based on incomplete data using Ebel's algorithm. Methods The program is available public use on our server and the source code is freely available under GNU General Public License. The utility is written in PHP, a common open source imbedded scripting language. The rating data can be entered in a convenient format on the user's personal computer that the program will upload to the server for calculating the reliability and other statistics describing the ratings. Results When the program is run it displays the reliability, number of subject rated, harmonic mean number of judges rating each subject, the mean and standard deviation of the averaged ratings per subject. The program also displays the mean, standard deviation and number of ratings for each subject rated. Additionally the program will estimate the reliability of an average of a number of ratings for each subject via the Spearman-Brown prophecy formula. Conclusion This simple web-based program provides a convenient means of estimating the reliability of rating data without the need to conduct special studies in order to provide complete rating data. I would welcome other researchers revising and enhancing the program.

  13. The Empathic Operating System (emOS)

    Science.gov (United States)

    2016-06-15

    and candidate sourcing websites, from which we interviewed and on-boarded a Project Manager, a Lead iOS Developer, and a UX Designer . We also...2016. Deliverable: Lead iOS Developer and part-time UX designer hired March 2016 The Lead iOS developer and User Experience designer began at...evidence providing a cardinal direction for app development. Deliverable: Lead iOS Developer and part-time UX designer integrated with existing and

  14. Metrology automation reliability

    Science.gov (United States)

    Chain, Elizabeth E.

    1996-09-01

    At Motorola's MOS-12 facility automated measurements on 200- mm diameter wafers proceed in a hands-off 'load-and-go' mode requiring only wafer loading, measurement recipe loading, and a 'run' command for processing. Upon completion of all sample measurements, the data is uploaded to the factory's data collection software system via a SECS II interface, eliminating the requirement of manual data entry. The scope of in-line measurement automation has been extended to the entire metrology scheme from job file generation to measurement and data collection. Data analysis and comparison to part specification limits is also carried out automatically. Successful integration of automated metrology into the factory measurement system requires that automated functions, such as autofocus and pattern recognition algorithms, display a high degree of reliability. In the 24- hour factory reliability data can be collected automatically on every part measured. This reliability data is then uploaded to the factory data collection software system at the same time as the measurement data. Analysis of the metrology reliability data permits improvements to be made as needed, and provides an accurate accounting of automation reliability. This reliability data has so far been collected for the CD-SEM (critical dimension scanning electron microscope) metrology tool, and examples are presented. This analysis method can be applied to such automated in-line measurements as CD, overlay, particle and film thickness measurements.

  15. Electronics reliability calculation and design

    CERN Document Server

    Dummer, Geoffrey W A; Hiller, N

    1966-01-01

    Electronics Reliability-Calculation and Design provides an introduction to the fundamental concepts of reliability. The increasing complexity of electronic equipment has made problems in designing and manufacturing a reliable product more and more difficult. Specific techniques have been developed that enable designers to integrate reliability into their products, and reliability has become a science in its own right. The book begins with a discussion of basic mathematical and statistical concepts, including arithmetic mean, frequency distribution, median and mode, scatter or dispersion of mea

  16. OS Independent Mobile Solutions for Manufacturing Execution Systems

    Directory of Open Access Journals (Sweden)

    Heiko Meyer

    2013-12-01

    Full Text Available From the suppliers' perspective it is best to provide the user of a plant with a mobile solution in the form of perfectly matching Apps for the rolled-out manufacturing execution system. Due to the extremely short innovation cycle in the mobile phone development and not least because of the first iPhone generation launch in 2007 the mobile phone market completely changed over the past four years. Today, a large percentage of the sold devices can be classified as smart phones. The paper describes an easy and reliable way to develop OS independent mobile solutions for all common smartphones based on standard technologies.

  17. EXPLOITATION RELIABILITY OF RECUPERATORS

    OpenAIRE

    A. M. Selutin; V. A. Zharanov; A. V. Tkachenko

    2006-01-01

    The investigations and experience of implementation of constructions, that provide increase of gas-tightness of heat-exchangers, are described in the article. The given variants of compensators of different types allow to increase the reliability of operation of systems of the fuel furnaces waste flue gases heat using.

  18. EXPLOITATION RELIABILITY OF RECUPERATORS

    Directory of Open Access Journals (Sweden)

    A. M. Selutin

    2006-01-01

    Full Text Available The investigations and experience of implementation of constructions, that provide increase of gas-tightness of heat-exchangers, are described in the article. The given variants of compensators of different types allow to increase the reliability of operation of systems of the fuel furnaces waste flue gases heat using.

  19. Grid reliability

    CERN Document Server

    Saiz, P; Rocha, R; Andreeva, J

    2007-01-01

    We are offering a system to track the efficiency of different components of the GRID. We can study the performance of both the WMS and the data transfers At the moment, we have set different parts of the system for ALICE, ATLAS, CMS and LHCb. None of the components that we have developed are VO specific, therefore it would be very easy to deploy them for any other VO. Our main goal is basically to improve the reliability of the GRID. The main idea is to discover as soon as possible the different problems that have happened, and inform the responsible. Since we study the jobs and transfers issued by real users, we see the same problems that users see. As a matter of fact, we see even more problems than the end user does, since we are also interested in following up the errors that GRID components can overcome by themselves (like for instance, in case of a job failure, resubmitting the job to a different site). This kind of information is very useful to site and VO administrators. They can find out the efficien...

  20. How Reliable Is Laboratory Testing?

    Science.gov (United States)

    ... electronic reports to the healthcare provider by directly printing the report in a provider's office with a ... increase the reliability of a diagnosis and can reduce the chance of medical errors. As this diagram ...

  1. Un estudio exploratorio del cuidado provisto por inmigrantes a personas mayores de 64 años en los hogares Care provided by immigrants to older people in households. An explorative study

    Directory of Open Access Journals (Sweden)

    Jesús Rogero-García

    2010-03-01

    Full Text Available Justificación: En España existen carencias en el conocimiento sobre el cuidado provisto por inmigrantes a personas mayores dependientes en los hogares. Objetivo: Realizar un conocimiento exploratorio del tipo de atención que proveen los cuidadores inmigrantes a las personas mayores en hogares. Metodología: Estudio transversal en 24 mujeres inmigrantes que trabajaban en hogares cuidando personas mayores dependientes en la Comunidad de Madrid en 2008. Resultados principales: Todas las cuidadoras realizaron actividades domésticas, el 87% labores de acompañamiento, el 79% ayudas personales y el 75% cuidados sociosanitarios. Dedicaron 3,77 horas diarias a actividades domésticas, 2,27 a acompañamiento, 1,30 horas a ayudas personales en el hogar, y 0,60 horas diarias a cuidados sociosanitarios. Quienes reflejaron menores niveles de autonomía en movilidad y cuidado recibieron más tiempo de cuidados sociosanitarios y de ayudas personales que el resto. Conclusiones: Los cuidados provistos a mayores en los hogares por familiares, instituciones públicas e inmigrantes remunerados responden a demandas similares y son potencialmente sustituibles. Las cuidadoras inmigrantes actúan como conectores de la persona dependiente con su red social y con las instituciones sanitarias y sociales. Se requieren estudios con mayores muestras para profundizar en este fenómeno.Background: There has been a lack of research examining the type of care provided by immigrants to elderly people in Spain. Aim: To carry out an exploratory analysis of the type of care provided by immigrant caregivers to elderly people in their own homes. Methodology: A cross sectional study was developed based on 24 foreign-born women working in private households caring for dependent elderly people in the Autonomous Community of Madrid in 2008. Main results: All caregivers carried out housework, 87% of them accompanying duties, 79% personal help and 75% nursing care. Caregivers devoted 3

  2. Synthesis and X-ray crystal structure of (OsO(3)F(2))(2)2XeOF(4) and the Raman spectra of (OsO(3)F(2))(infinity), (OsO(3)F(2))(2), and (OsO(3)F(2))(2)2XeOF(4).

    Science.gov (United States)

    Hughes, Michael J; Mercier, Hélène P A; Schrobilgen, Gary J

    2009-05-18

    assigned by comparison with the calculated frequencies of (mu-FOsO(3)F(2))(2)OsO(3)F(-), providing more complete and reliable assignments than were previously available.

  3. Frontiers of reliability

    CERN Document Server

    Basu, Asit P; Basu, Sujit K

    1998-01-01

    This volume presents recent results in reliability theory by leading experts in the world. It will prove valuable for researchers, and users of reliability theory. It consists of refereed invited papers on a broad spectrum of topics in reliability. The subjects covered include Bayesian reliability, Bayesian reliability modeling, confounding in a series system, DF tests, Edgeworth approximation to reliability, estimation under random censoring, fault tree reduction for reliability, inference about changes in hazard rates, information theory and reliability, mixture experiment, mixture of Weibul

  4. MOLAR: Modular Linux and Adaptive Runtime Support for HEC OS/R Research

    Energy Technology Data Exchange (ETDEWEB)

    Frank Mueller

    2009-02-05

    MOLAR is a multi-institution research effort that concentrates on adaptive, reliable,and efficient operating and runtime system solutions for ultra-scale high-end scientific computing on the next generation of supercomputers. This research addresses the challenges outlined by the FAST-OS - forum to address scalable technology for runtime and operating systems --- and HECRTF --- high-end computing revitalization task force --- activities by providing a modular Linux and adaptable runtime support for high-end computing operating and runtime systems. The MOLAR research has the following goals to address these issues. (1) Create a modular and configurable Linux system that allows customized changes based on the requirements of the applications, runtime systems, and cluster management software. (2) Build runtime systems that leverage the OS modularity and configurability to improve efficiency, reliability, scalability, ease-of-use, and provide support to legacy and promising programming models. (3) Advance computer reliability, availability and serviceability (RAS) management systems to work cooperatively with the OS/R to identify and preemptively resolve system issues. (4) Explore the use of advanced monitoring and adaptation to improve application performance and predictability of system interruptions. The overall goal of the research conducted at NCSU is to develop scalable algorithms for high-availability without single points of failure and without single points of control.

  5. Reliability and construction control

    Directory of Open Access Journals (Sweden)

    Sherif S. AbdelSalam

    2016-06-01

    Full Text Available The goal of this study was to determine the most reliable and efficient combination of design and construction methods required for vibro piles. For a wide range of static and dynamic formulas, the reliability-based resistance factors were calculated using EGYPT database, which houses load test results for 318 piles. The analysis was extended to introduce a construction control factor that determines the variation between the pile nominal capacities calculated using static versus dynamic formulae. From the major outcomes, the lowest coefficient of variation is associated with Davisson’s criterion, and the resistance factors calculated for the AASHTO method are relatively high compared with other methods. Additionally, the CPT-Nottingham and Schmertmann method provided the most economic design. Recommendations related to a pile construction control factor were also presented, and it was found that utilizing the factor can significantly reduce variations between calculated and actual capacities.

  6. Medicare Provider Data - Hospice Providers

    Data.gov (United States)

    U.S. Department of Health & Human Services — The Hospice Utilization and Payment Public Use File provides information on services provided to Medicare beneficiaries by hospice providers. The Hospice PUF...

  7. OS MUSEUS COMO ESPAÇOS EDUCATIVOS

    Directory of Open Access Journals (Sweden)

    Maria da Graça J. Setton

    2017-09-01

    Full Text Available RESUMO: O objetivo deste artigo é fazer uma reflexão acerca dos espaços museológicos como prática educativa. Concebendo-os como um lazer diferenciado, tem-se uma falsa representação de que parte da população seria incapaz de usufruir de seus acervos. Partindo de uma perspectiva histórica acerca dos museus e da teoria de Pierre Bourdieu, procurou-se observar estruturas mentais que instauram barreiras culturais para algumas linguagens e práticas. Nesse sentido, como inspiração, visitaram-se alguns acervos no intuito de apreender as estratégias de aproximação e/ou afastamento de suas exposições. Para finalizar, problematizando o envolvimento com práticas de cultura responsáveis em grande parte pela formação de um capital cultural, provocou-se a reflexão sobre as diferentes formas de apreciar e de se sensibilizar com artefatos culturais diversos.

  8. The Double-System Architecture for Trusted OS

    Science.gov (United States)

    Zhao, Yong; Li, Yu; Zhan, Jing

    With the development of computer science and technology, current secure operating systems failed to respond to many new security challenges. Trusted operating system (TOS) is proposed to try to solve these problems. However, there are no mature, unified architectures for the TOS yet, since most of them cannot make clear of the relationship between security mechanism and the trusted mechanism. Therefore, this paper proposes a double-system architecture (DSA) for the TOS to solve the problem. The DSA is composed of the Trusted System (TS) and the Security System (SS). We constructed the TS by establishing a trusted environment and realized related SS. Furthermore, we proposed the Trusted Information Channel (TIC) to protect the information flow between TS and SS. In a word, the double system architecture we proposed can provide reliable protection for the OS through the SS with the supports provided by the TS.

  9. The Interpretatiom of Contracts to Provide Health Service With the Ligth of the Principle of Dignity of Human Person A interpretação dos contratos de prestação de serviços de saúde à luz do princípio da dignidade da pessoa humana

    Directory of Open Access Journals (Sweden)

    Adauto de Almeida Tomaszewski

    2010-11-01

    Full Text Available The dignity of the human person, as one of the founding principles of the Federative Republic of Brazil and the Democratic State must, even as possible, be respected when interpreting a contract of health service providing by the operator of right in front of a concrete case. After showing this premise, this study has as main objective to perform an analysis of the many rules of interpretation of the contracts of health service providing, in face of the principles and constitutional norms, as well as infra-constitutional legislation applicable to it, also aiming to acquire economic equilibrium and contractual justice. This theme is very relevant, because the number of beneficiaries of contracts of health service increases every year, before State’s inability to provide to all citizens a public health model, sculptured in article 196 of the Constitution of 1988, giving to the private business the possibility of exploration of this relevant state activity (articles 170 and 199 of the Constitution of 1988. Finally, it aims to encourage the parties involved in the contract to have a real and permanent debate, as a result of a critical reflection about all the variables involved in this context, aimed also to improve the entire health system (public and private ones, and, as a consequence of it, the faithful fulfillment of constitutional guidelines, because the article XXV of the Universal Declaration of Human Rights guarantees to every person the right to have a comprehensive health and dignity.A dignidade da pessoa humana, enquanto um dos princípios fundantes da República Federativa do Brasil e do Estado Democrático de Direito, deve, sempre que possível, ser levada em linha de conta quando da interpretação de um contrato de prestação de serviços de saúde pelo operador do Direito, diante de um caso concreto. Colocada essa premissa, tem o presente estudo como objetivo primordial, efetuar a análise das diversas regras de interpreta

  10. Diagnostic characterization of services providing care to victims of accidents and violence in five Brazilian state capitals Caracterização diagnóstica dos serviços que atendem a vítimas de acidentes e violências em cinco capitais brasileiras

    Directory of Open Access Journals (Sweden)

    Suely Ferreira Deslandes

    2006-06-01

    Full Text Available This article characterizes the services providing care to victims in five Brazilian regions with high violence and accident rates. It analyzes care activities and strategies, the profile of the teams, the conditions of installations, equipment and supplies, integrated care and registration services and the opinion of health managers with respect to the needs and requirements for a better care to the victims. The sample is composed by 103 services: 34 from Recife, 25 from Rio de Janeiro, 18 from Manaus, 18 from Curitiba and 8 from Brasília. The still preliminary results indicate: lower number of services focusing on the elderly; scarce investment in preventive actions; the principal actions carried out are social assistance, ambulatory and hospital care and psychological assistance; patients received from Basic Health Units require attention of the communities and families; need for investment in capacity building programs for professionals; precarious registries, data handled manually. The wording of the National Policy for Reduction of Morbidity and Mortality from Accidents and Violence is not well-known and there is a lack of articulation among and inside sectors and between prehospital and emergency care services. Rehabilitation services are insufficient in all cities.Este artigo caracteriza serviços que atendem as vítimas em capitais das cinco regiões brasileiras com altos índices de violências e acidentes. Analisam-se atividades e estratégias de atendimento, perfil das equipes, condições das instalações, equipamentos e insumos, serviços integrados de atenção e de registro de agravos e a ótica de gestores de saúde sobre demandas e necessidades para uma atenção de qualidade às vítimas. O acervo se constitui de 103 serviços: 34 de Recife, 25 de Rio de Janeiro, 18 de Manaus, 18 de Curitiba e 8 de Brasília. Os resultados ainda preliminares indicam: menor número de serviços com atendimentos voltados a idosos; pouco

  11. Caracterização diagnóstica dos serviços que atendem vítimas de acidentes e violências em cinco capitais brasileiras Diagnostic characterization of services providing care to victims of accidents and violence in five Brazilian state capitals

    Directory of Open Access Journals (Sweden)

    Suely Ferreira Deslandes

    2006-01-01

    Full Text Available Este artigo caracteriza serviços que atendem as vítimas em capitais das cinco regiões brasileiras com altos índices de violências e acidentes.Analisam-se atividades e estratégias de atendimento, perfil das equipes, condições das instalações, equipamentos e insumos, serviços integrados de atenção e de registro de agravos e a ótica de gestores de saúde sobre demandas e necessidades para uma atenção de qualidade às vítimas. O acervo se constitui de 103 serviços: 34 de Recife, 25 do Rio de Janeiro, 18 de Manaus, 18 de Curitiba e 8 de Brasília. Os resultados ainda preliminares indicam: menor número de serviços com atendimentos voltados a idosos; pouco investimento em ações de prevenção; suporte social, atendimento ambulatorial, hospitalar e psicológico são as principais ações empreendidas; encaminhamentos das unidades básicas de saúde requerem atenção nas comunidades e famílias; necessidade de investimentos na capacitação dos profissionais para atendimento; registros precários e feitos manualmente. O texto da Política Nacional de Redução de Morbimortalidade por Acidentes e Violências é pouco conhecido e há desarticulação inter e intra-institucional e entre atendimento pré-hospitalar e de emergência. Em todas as cidades há insuficiência de serviços de reabilitação.This article characterizes the services providing care to victims in five Brazilian regions with high violence and accident rates. It analyzes care activities and strategies, the profile of the teams, the conditions of installations, equipment and supplies, integrated care and registration services and the opinion of health managers with respect to the needs and requirements for a better care to the victims. The sample is composed by 103 services: 34 from Recife, 25 from Rio de Janeiro, 18 from Manaus, 18 from Curitiba and 8 from Brasília. The still preliminary results indicate: lower number of services focusing on the elderly; scarce

  12. Desempenho de serviços de saúde no tratamento diretamente observado no domicílio para controle da tuberculose Desempeño de los servicios de salud para el control de la tuberculosis a través del tratamiento domiciliar directamente observado The performance of health services in providing dots in households to control tuberculosis

    Directory of Open Access Journals (Sweden)

    Roxana Isabel Cardozo Gonzales

    2008-12-01

    Full Text Available Este é um estudo exploratório de natureza quantitativa e qualitativa, que avalia o desempenho dos serviços de saúde na execução do DOT no domicílio em um município de grande porte. Para a análise quantitativa foram construídos indicadores que avaliaram a otimização dos recursos materiais/humanos e a efetivação da observação da ingestão da medicação. Identificou-se que o desempenho dos serviços é influenciado pela disponibilidade de recursos humanos/materiais, organização interna dos serviços e ausência do doente no domicílio. Para a análise qualitativa, utilizou-se a técnica de análise de conteúdo, modalidade temática. A Debilidade de recursos materiais e humanos dos serviços de saúde e o Contexto sócio-cultural e econômico do doente foram identificados como os principais fatores que influenciam no desempenho dos serviços de saúde. Considera-se necessário uma permanente qualificação gerencial, organizativa e técnico-assistencial dos profissionais no controle da TB.Estudio exploratorio de tipo cuantitativo y cualitativo, que evalúa el desempeño de los servicios de salud al realizar el DOT en el domicilio en una ciudad grande. Para el análisis cuantitativo fueron construidos indicadores que evalúan la optimización de los recursos materiales/humanos y la observación de la ingestión de los medicamentos. Se identificó que el desempeño es influenciado por la disponibilidad de recursos humanos/materiales, organización interna de los servicios y la ausencia del enfermo en el domicilio. Para el análisis cualitativo, se utilizó la técnica de análisis de contenido por temática. La Debilidad en cuanto a recursos materiales y humanos en los servicios de salud y el Contexto socio-cultural y económico del enfermo fueron identificados como principales factores que influyen en el desempeño de los servicios de salud. Es importante una permanente calificación gerencial, organizativa y t

  13. Building a Reliable Onboard Network with Ethernet: A GSFC Prototype

    Science.gov (United States)

    Marquart, Jane

    2004-01-01

    This viewgraph presentation discusses the architecture of an Ethernet-based communication network for spacecraft. The presentation also contains information on data link reliability, PDU formats, and NIC/OS Measurements.

  14. Software Architecture Reliability Analysis using Failure Scenarios

    NARCIS (Netherlands)

    Tekinerdogan, B.; Sözer, Hasan; Aksit, Mehmet

    2005-01-01

    We propose a Software Architecture Reliability Analysis (SARA) approach that benefits from both reliability engineering and scenario-based software architecture analysis to provide an early reliability analysis of the software architecture. SARA makes use of failure scenarios that are prioritized

  15. Mac OS X for Astronomy

    Science.gov (United States)

    Pierfederici, F.; Pirzkal, N.; Hook, R. N.

    Mac OS X is the new Unix based version of the Macintosh operating system. It combines a high performance DisplayPDF user interface with a standard BSD UNIX subsystem and provides users with simultaneous access to a broad range of applications which were not previously available on a single system such as Microsoft Office and Adobe Photoshop, as well as legacy X11-based scientific tools and packages like IRAF, SuperMongo, MIDAS, etc. The combination of a modern GUI layered on top of a familiar UNIX environment paves the way for new, more flexible and powerful astronomical tools to be developed while assuring compatibility with already existing, older programs. In this paper, we outline the strengths of the Mac OS X platform in a scientific environment, astronomy in particular, and point to the numerous astronomical software packages available for this platform; most notably the Scisoft collection which we have compiled.

  16. Fatores associados ao uso de diretrizes clínicas em operadoras de planos de saúde e prestadores de serviços hospitalares no campo da Saúde Suplementar no Brasil Factors associated with the use of clinical guidelines by health plan operators and their inpatient care providers

    Directory of Open Access Journals (Sweden)

    Margareth Crisóstomo Portela

    2008-10-01

    Full Text Available Este artigo objetiva identificar fatores associados ao uso de diretrizes clínicas, segundo percepção de dirigentes respondentes, em operadoras de planos de saúde e prestadores de serviços hospitalares no campo da saúde suplementar no Brasil. Utiliza dados de dois inquéritos de abrangência nacional: um envolvendo 90 operadoras selecionadas aleatoriamente de um universo de 1.573, voltado para a caracterização da implementação de diretrizes clínicas e outros instrumentos e práticas de gestão da clínica; e outro envolvendo 74 hospitais, selecionados de um universo de 3.817 prestadores de serviços hospitalares a planos de saúde, destinado a apreender os mecanismos de microrregulação das operadoras e suas possíveis repercussões sobre as práticas dos hospitais. Referiram o uso de diretrizes clínicas 32,3% das operadoras e 51,6% dos hospitais. Entre as primeiras, mostraram-se independentemente associados ao uso de diretrizes, localização geográfica, tipo e porte da operadora, enquanto que, entre os hospitais, porte, complexidade e uso de outras ferramentas da gestão da clínica. Os resultados evidenciam o quanto ainda é incipiente e insatisfatória a gestão, por operadoras e hospitais, sobre a qualidade dos cuidados à saúde providos aos pacientes.This paper is aimed at identifying factors related to the use of clinical guidelines by health plan operators and their inpatient care providers in the supplementary care sector in Brazil from the viewpoint of managers. The study is based on two national surveys: one involving 90 health plan operators randomly selected from a universe of 1573, oriented towards characterizing the implementation of clinical guidelines and other tools of clinical governance; and another involving 74 hospitals, selected from a universe of 3817 inpatient care providers, aimed at capturing micro-regulation mechanisms applied by health plan operators and their repercussions on hospital practices. Use of

  17. Conceptions of reliability revisited and practical recommendations.

    Science.gov (United States)

    Sijtsma, Klaas; van der Ark, L Andries

    2015-01-01

    We discuss reliability definitions from the perspectives of classical test theory, factor analysis, and generalizability theory. For each method, we discuss the rationale, the estimation of reliability, and the goodness of fit of the model that defines the reliability coefficient to the data. Similarities and differences in the three approaches are highlighted. Finally, we provide a computational example using generated data to illustrate the differences among the different reliability methods.

  18. Os concursos no Facebook

    OpenAIRE

    Simões, Sara Raquel Branco

    2016-01-01

    Nota: 14 valores Com o surgimento da Internet, todas as estratégias e conteúdo das marcas necessitam de ter em conta a aplicabilidade no mundo digital, sendo imperativo conseguir captar a atenção de todos os potenciais destinatários das iniciativas de marketing. Assim, atualmente o marketing não se pratica apenas offline, sendo o social media um verdadeiro impulsionador das relações entre as marcas e os seus clientes e seguidores. Por outro lado, o Facebook é a rede social m...

  19. The Definitive Guide to CentOS

    CERN Document Server

    Membrey, P; Angenendt, R

    2009-01-01

    CentOS is just like Red Hat, but without the price tag and with the virtuous license. When belts have to be tightened, we want to read about an OS with all the features of a commercial Linux variety, but without the pain. The Definitive Guide to CentOS is the first definitive reference for CentOS and focuses on CentOS alone, the workhorse Linux distro, that does the heavy lifting in small and medium-size enterprises without drawing too much attention to itself. *Provides tutorial and hands-on learning but is also designed to be used as a reference*Bases all examples on real-world tasks that re

  20. Transit Reliability Information Program : Reliability Verification Demonstration Plan for Rapid Rail Vehicles

    Science.gov (United States)

    1981-08-01

    The Transit Reliability Information Program (TRIP) is a government-initiated program to assist the transit industry in satisfying its need for transit reliability information. TRIP provides this assistance through the operation of a national Data Ban...

  1. OS Friendly Microprocessor Architecture

    Science.gov (United States)

    2017-04-01

    Architecture Version 2 Permission Bit Cache Bank Architecture 28 5.7 Microkernel, OS, and Application Cache Banks Organization 29 5.8 Process Level Cache... architecture cache bank organization 5.8 Process Level Cache Bank Operations Figure 26 presents a simplified example of microkernel cache banks and cache...

  2. Reliability analysis in intelligent machines

    Science.gov (United States)

    Mcinroy, John E.; Saridis, George N.

    1990-01-01

    Given an explicit task to be executed, an intelligent machine must be able to find the probability of success, or reliability, of alternative control and sensing strategies. By using concepts for information theory and reliability theory, new techniques for finding the reliability corresponding to alternative subsets of control and sensing strategies are proposed such that a desired set of specifications can be satisfied. The analysis is straightforward, provided that a set of Gaussian random state variables is available. An example problem illustrates the technique, and general reliability results are presented for visual servoing with a computed torque-control algorithm. Moreover, the example illustrates the principle of increasing precision with decreasing intelligence at the execution level of an intelligent machine.

  3. Nonspecialist Raters Can Provide Reliable Assessments of Procedural Skills

    DEFF Research Database (Denmark)

    Mahmood, Oria; Dagnæs, Julia; Bube, Sarah

    2018-01-01

    skills which is difficult owing to the limited availability of faculty time. The aim of this study was to explore the validity of assessments of video recorded procedures performed by nonspecialist raters. METHODS: This study was a blinded observational trial. Twenty-three novices (senior medical...

  4. The ARES test system for palm OS handheld computers.

    Science.gov (United States)

    Elsmore, Timothy F; Reeves, Dennis L; Reeves, Andrea N

    2007-02-01

    The ARES (ANAM Readiness Evaluation System) is a cognitive testing system designed for operation on palm OS handheld computers i.e., Personal Digital Assistants (PDA). It provides an inexpensive and portable testing platform for field and clinical applications. ARES test batteries can be configured from a library of tests derived from the ANAM test system. ARES features include support of multiple users on a single PDA, a Microsoft Windows test battery authoring program, and a program for downloading, viewing, graphing, and archiving data. In validity tests, the same subjects were tested on identical ARES and conventional ANAM NeuroCog test batteries. Scores from the two platforms correlated highly, but absolute scores differed slightly. In reliability testing with the ARES Warrior battery, ARES scores were highly correlated in daily tests.

  5. O papel necessário da Agência Nacional de Saúde Suplementar na regulação das relações entre operadoras de planos de saúde e prestadores de serviços The necessary role of the National Supplementary Health Agency in the regulation of relations between managed care companies and service providers

    Directory of Open Access Journals (Sweden)

    Silvia Gerschman

    2012-06-01

    Full Text Available Este artigo trata do papel regulatório que caberia à Agência Nacional de Saúde Suplementar (ANS desempenhar, a partir do resultado de um conjunto de pesquisas e estudos sobre as práticas de microrregulação exercidas pelas operadoras de planos de saúde sobre os prestadores hospitalares privados. O trabalho se baseia em diversos estudos e, especialmente, nos resultados da pesquisa de Ugá et al. (2007, cujos resultados permitiram a problematização de questões relativas à necessidade de regular alguns elementos da relação entre operadoras e prestadores hospitalares, fundamentais para a garantia do acesso e da qualificação da atenção recebida por clientes de operadoras de planos privados de saúde; e também relativas à importância que os prestadores hospitalares privados possuem para o SUS. Busca-se, assim, a partir dos estudos sobre o tema, refletir tanto sobre o papel regulador a ser desempenhado pela ANS nas relações contratuais entre operadoras e prestadores, quanto sobre o papel que ao SUS caberia exercer.This paper discusses the regulatory role that would fit the National Supplementary Health Agency (ANS, from the results of researches and studies on the practices of micro-regulation performed by private managed care companies on hospital providers they contract. It is based on several studies, especially on the research by Ugá el al (2007, whose results allowed the questioning of issues related to the necessary regulation of some elements of the relationship between health managed care companies and hospital providers, key to ensuring access and qualification of health care received by customers of those companies, as well as the importance that hospital providers have for the public health system, SUS. The paper aims, therefore, from the studies on the subject, to reflect on the regulatory role to be played by ANS in the contractual relations between managed care companies and providers and on the role that would fit

  6. Human Reliability Program Overview

    Energy Technology Data Exchange (ETDEWEB)

    Bodin, Michael

    2012-09-25

    This presentation covers the high points of the Human Reliability Program, including certification/decertification, critical positions, due process, organizational structure, program components, personnel security, an overview of the US DOE reliability program, retirees and academia, and security program integration.

  7. Improving Software Reliability Forecasting

    NARCIS (Netherlands)

    Burtsy, Bernard; Albeanu, Grigore; Boros, Dragos N.; Popentiu, Florin; Nicola, V.F.

    1996-01-01

    This work investigates some methods for software reliability forecasting. A supermodel is presented as a suited tool for prediction of reliability in software project development. Also, times series forecasting for cumulative interfailure time is proposed and illustrated.

  8. Reliable Design Versus Trust

    Science.gov (United States)

    Berg, Melanie; LaBel, Kenneth A.

    2016-01-01

    This presentation focuses on reliability and trust for the users portion of the FPGA design flow. It is assumed that the manufacturer prior to hand-off to the user tests FPGA internal components. The objective is to present the challenges of creating reliable and trusted designs. The following will be addressed: What makes a design vulnerable to functional flaws (reliability) or attackers (trust)? What are the challenges for verifying a reliable design versus a trusted design?

  9. Principles of Bridge Reliability

    DEFF Research Database (Denmark)

    Thoft-Christensen, Palle; Nowak, Andrzej S.

    The paper gives a brief introduction to the basic principles of structural reliability theory and its application to bridge engineering. Fundamental concepts like failure probability and reliability index are introduced. Ultimate as well as serviceability limit states for bridges are formulated......, and as an example the reliability profile and a sensitivity analyses for a corroded reinforced concrete bridge is shown....

  10. Integrated system reliability analysis

    DEFF Research Database (Denmark)

    Gintautas, Tomas; Sørensen, John Dalsgaard

    Specific targets: 1) The report shall describe the state of the art of reliability and risk-based assessment of wind turbine components. 2) Development of methodology for reliability and risk-based assessment of the wind turbine at system level. 3) Describe quantitative and qualitative measures...... (indicators) that can be used to assess the reliability of innovations and new technologies....

  11. Power system reliability

    Energy Technology Data Exchange (ETDEWEB)

    Allan, R.; Billinton, Roy (Manchester Univ. (United Kingdom). Inst. of Science and Technology Saskatchewan Univ., Saskatoon, SK (Canada))

    1994-01-01

    The function of an electric power system is to satisfy the system load as economically as possible and with a reasonable assurance of continuity or reliability. The application of quantitative reliability techniques in planning and operation has increased considerably in the past few years. Reliability evaluation is now becoming an integral part of the economic comparison of alternatives (6 figures, 17 references) (Author)

  12. Developing Reliable Life Support for Mars

    Science.gov (United States)

    Jones, Harry W.

    2017-01-01

    A human mission to Mars will require highly reliable life support systems. Mars life support systems may recycle water and oxygen using systems similar to those on the International Space Station (ISS). However, achieving sufficient reliability is less difficult for ISS than it will be for Mars. If an ISS system has a serious failure, it is possible to provide spare parts, or directly supply water or oxygen, or if necessary bring the crew back to Earth. Life support for Mars must be designed, tested, and improved as needed to achieve high demonstrated reliability. A quantitative reliability goal should be established and used to guide development t. The designers should select reliable components and minimize interface and integration problems. In theory a system can achieve the component-limited reliability, but testing often reveal unexpected failures due to design mistakes or flawed components. Testing should extend long enough to detect any unexpected failure modes and to verify the expected reliability. Iterated redesign and retest may be required to achieve the reliability goal. If the reliability is less than required, it may be improved by providing spare components or redundant systems. The number of spares required to achieve a given reliability goal depends on the component failure rate. If the failure rate is under estimated, the number of spares will be insufficient and the system may fail. If the design is likely to have undiscovered design or component problems, it is advisable to use dissimilar redundancy, even though this multiplies the design and development cost. In the ideal case, a human tended closed system operational test should be conducted to gain confidence in operations, maintenance, and repair. The difficulty in achieving high reliability in unproven complex systems may require the use of simpler, more mature, intrinsically higher reliability systems. The limitations of budget, schedule, and technology may suggest accepting lower and

  13. Implementação de um sistema Collaborative Planning, Forecasting, and Replenishment em uma grande rede de fast food por meio de um prestador de serviços logísticos Implementation of a Collaborative Planning, Forecasting, and Replenishment system in a large fast food company through a logistics provider

    Directory of Open Access Journals (Sweden)

    Mauro Vivaldini

    2008-12-01

    Full Text Available A gestão colaborativa é, atualmente, um elemento-chave no contexto da gestão da cadeia de suprimentos. Neste artigo, o tema é abordado mediante a análise de um caso real, em que uma grande rede mundial de fast-food e seu prestador de serviço logístico (PSL trabalharam conjuntamente no Brasil em um projeto-piloto para a implementação de um collaborative planning, forecasting, and replenishment (CPFR. O trabalho faz uso de uma metodologia de pesquisa-ação e apresenta as principais variáveis que influenciaram o projeto, abordando os processos necessários para a implementação e os pontos que favorecem o CPFR. Com base no caso estudado, o trabalho apresenta um conjunto de propostas sobre o papel dos agentes da cadeia em projetos dessa natureza. A gestão da cadeia de suprimentos por intermédio da coordenação direta de um PSL também permite demonstrar as possibilidades e dificuldades desse sistema, contribuindo com a visão colaborativa na cadeia de suprimentos a partir da relação entre seus agentes.Nowadays, Collaborative Planning has been considered a key element in the Supply Chain Management context. In this article, this topic is addressed by a real case where a large worldwide fast-food network and its logistics provider worked together in Brazil in a pilot project in order to implement a Collaborative Planning, Forecasting, and Replenishment (CPFR system. Based on an action research approach, this paper presents the main variables that influenced the real project embracing the necessary processes, and it points out those that leveraged the CPFR implementation. Based on the case studied, a set of proposals about the role of the supply chain agents in similar projects is presented. Moreover, the case of conducting the supply chain management by a direct coordination of a logistics provider also allows to highlight the possibilities and difficulties of the CPFR system and to contribute towards a supply chain agents

  14. Os odontoideum: case report

    OpenAIRE

    Pinho, André Rodrigues; Moutinho, Vitorino Veludo; Silva,Nuno Paulo Alegrete; Serdoura,António Francisco Martingo; Freitas, Joana Manuel Ferreira; Pinto, Rui Alexandre Peixoto; Cabral, Abel Vitorino Trigo

    2012-01-01

    OBJECTIVE: To report the difficulties in managing a case of os odontoideum. METHODS: Female patient, 12 years old who developed a quadiparesis after minor cervical trauma in October 2005. In the emergency department a congenital cervical anomaly was identified. The patient was placed in a Stryker® frame and, few days later, in a halo bracing. After 3 months, an infection around the pins emerged and the halo vest had to be removed. A severe C1-2 instability persisted and a C1-C2 Gallie procedu...

  15. Reliability in the design phase

    Energy Technology Data Exchange (ETDEWEB)

    Siahpush, A.S.; Hills, S.W.; Pham, H. (EG and G Idaho, Inc., Idaho Falls, ID (United States)); Majumdar, D. (USDOE Idaho Field Office, Idaho Falls, ID (United States))

    1991-12-01

    A study was performed to determine the common methods and tools that are available to calculated or predict a system's reliability. A literature review and software survey are included. The desired product of this developmental work is a tool for the system designer to use in the early design phase so that the final design will achieve the desired system reliability without lengthy testing and rework. Three computer programs were written which provide the first attempt at fulfilling this need. The programs are described and a case study is presented for each one. This is a continuing effort which will be furthered in FY-1992. 10 refs.

  16. Reliability in the design phase

    Energy Technology Data Exchange (ETDEWEB)

    Siahpush, A.S.; Hills, S.W.; Pham, H. [EG and G Idaho, Inc., Idaho Falls, ID (United States); Majumdar, D. [USDOE Idaho Field Office, Idaho Falls, ID (United States)

    1991-12-01

    A study was performed to determine the common methods and tools that are available to calculated or predict a system`s reliability. A literature review and software survey are included. The desired product of this developmental work is a tool for the system designer to use in the early design phase so that the final design will achieve the desired system reliability without lengthy testing and rework. Three computer programs were written which provide the first attempt at fulfilling this need. The programs are described and a case study is presented for each one. This is a continuing effort which will be furthered in FY-1992. 10 refs.

  17. Reliability and safety engineering

    CERN Document Server

    Verma, Ajit Kumar; Karanki, Durga Rao

    2016-01-01

    Reliability and safety are core issues that must be addressed throughout the life cycle of engineering systems. Reliability and Safety Engineering presents an overview of the basic concepts, together with simple and practical illustrations. The authors present reliability terminology in various engineering fields, viz.,electronics engineering, software engineering, mechanical engineering, structural engineering and power systems engineering. The book describes the latest applications in the area of probabilistic safety assessment, such as technical specification optimization, risk monitoring and risk informed in-service inspection. Reliability and safety studies must, inevitably, deal with uncertainty, so the book includes uncertainty propagation methods: Monte Carlo simulation, fuzzy arithmetic, Dempster-Shafer theory and probability bounds. Reliability and Safety Engineering also highlights advances in system reliability and safety assessment including dynamic system modeling and uncertainty management. Cas...

  18. Brasileños

    Directory of Open Access Journals (Sweden)

    Ana Almeida

    2007-01-01

    Full Text Available En este estudio se exploran las explicaciones causales de adolescentes de 15 años portugueses y brasileños sobre las relaciones de maltrato entre iguales. A partir de una narrativa gráfica presentada en viñetas, acompañada de una entrevista semiestructurada se pretende crear el contexto narrativo que da margen para la interpretación, las atribuciones emocionales y para los juicios socio-morales presentes en las explicaciones del maltrato. Estos aspectos fueron codificados a partir del análisis de contenido de las entrevistas individuales utilizando un sistema de categorías previamente elaborado. Los resultados muestran que los adolescentes perciben el maltrato como un patrón característico de interacción desarrollado en la relación entre víctima y agresor, y sostenido en la dinámica de los grupos de iguales. Estos datos fueron discutidos a la luz de de los objetivos del estudio, tratando de evidenciar la importancia de atender a lo que los adolescentes dicen, piensan y comprenden acerca de los malos tratos de cara a la investigación e intervención.

  19. Structural Reliability Methods

    DEFF Research Database (Denmark)

    Ditlevsen, Ove Dalager; Madsen, H. O.

    The structural reliability methods quantitatively treat the uncertainty of predicting the behaviour and properties of a structure given the uncertain properties of its geometry, materials, and the actions it is supposed to withstand. This book addresses the probabilistic methods for evaluation...... of structural reliability, including the theoretical basis for these methods. Partial safety factor codes under current practice are briefly introduced and discussed. A probabilistic code format for obtaining a formal reliability evaluation system that catches the most essential features of the nature...

  20. Reliable computation from contextual correlations

    Science.gov (United States)

    Oestereich, André L.; Galvão, Ernesto F.

    2017-12-01

    An operational approach to the study of computation based on correlations considers black boxes with one-bit inputs and outputs, controlled by a limited classical computer capable only of performing sums modulo-two. In this setting, it was shown that noncontextual correlations do not provide any extra computational power, while contextual correlations were found to be necessary for the deterministic evaluation of nonlinear Boolean functions. Here we investigate the requirements for reliable computation in this setting; that is, the evaluation of any Boolean function with success probability bounded away from 1 /2 . We show that bipartite CHSH quantum correlations suffice for reliable computation. We also prove that an arbitrarily small violation of a multipartite Greenberger-Horne-Zeilinger noncontextuality inequality also suffices for reliable computation.

  1. Measurement System Reliability Assessment

    Directory of Open Access Journals (Sweden)

    Kłos Ryszard

    2015-06-01

    Full Text Available Decision-making in problem situations is based on up-to-date and reliable information. A great deal of information is subject to rapid changes, hence it may be outdated or manipulated and enforce erroneous decisions. It is crucial to have the possibility to assess the obtained information. In order to ensure its reliability it is best to obtain it with an own measurement process. In such a case, conducting assessment of measurement system reliability seems to be crucial. The article describes general approach to assessing reliability of measurement systems.

  2. Test Reliability at the Individual Level

    Science.gov (United States)

    Hu, Yueqin; Nesselroade, John R.; Erbacher, Monica K.; Boker, Steven M.; Burt, S. Alexandra; Keel, Pamela K.; Neale, Michael C.; Sisk, Cheryl L.; Klump, Kelly

    2016-01-01

    Reliability has a long history as one of the key psychometric properties of a test. However, a given test might not measure people equally reliably. Test scores from some individuals may have considerably greater error than others. This study proposed two approaches using intraindividual variation to estimate test reliability for each person. A simulation study suggested that the parallel tests approach and the structural equation modeling approach recovered the simulated reliability coefficients. Then in an empirical study, where forty-five females were measured daily on the Positive and Negative Affect Schedule (PANAS) for 45 consecutive days, separate estimates of reliability were generated for each person. Results showed that reliability estimates of the PANAS varied substantially from person to person. The methods provided in this article apply to tests measuring changeable attributes and require repeated measures across time on each individual. This article also provides a set of parallel forms of PANAS. PMID:28936107

  3. Test Reliability at the Individual Level.

    Science.gov (United States)

    Hu, Yueqin; Nesselroade, John R; Erbacher, Monica K; Boker, Steven M; Burt, S Alexandra; Keel, Pamela K; Neale, Michael C; Sisk, Cheryl L; Klump, Kelly

    2016-01-01

    Reliability has a long history as one of the key psychometric properties of a test. However, a given test might not measure people equally reliably. Test scores from some individuals may have considerably greater error than others. This study proposed two approaches using intraindividual variation to estimate test reliability for each person. A simulation study suggested that the parallel tests approach and the structural equation modeling approach recovered the simulated reliability coefficients. Then in an empirical study, where forty-five females were measured daily on the Positive and Negative Affect Schedule (PANAS) for 45 consecutive days, separate estimates of reliability were generated for each person. Results showed that reliability estimates of the PANAS varied substantially from person to person. The methods provided in this article apply to tests measuring changeable attributes and require repeated measures across time on each individual. This article also provides a set of parallel forms of PANAS.

  4. Reliability assurance for regulation of advanced reactors

    Energy Technology Data Exchange (ETDEWEB)

    Fullwood, R.; Lofaro, R.; Samanta, P.

    1991-12-31

    The advanced nuclear power plants must achieve higher levels of safety than the first generation of plants. Showing that this is indeed true provides new challenges to reliability and risk assessment methods in the analysis of the designs employing passive and semi-passive protection. Reliability assurance of the advanced reactor systems is important for determining the safety of the design and for determining the plant operability. Safety is the primary concern, but operability is considered indicative of good and safe operation. This paper discusses several concerns for reliability assurance of the advanced design encompassing reliability determination, level of detail required in advanced reactor submittals, data for reliability assurance, systems interactions and common cause effects, passive component reliability, PRA-based configuration control system, and inspection, training, maintenance and test requirements. Suggested approaches are provided for addressing each of these topics.

  5. TinyOS Alliance Structure

    DEFF Research Database (Denmark)

    Bonnet, Philippe; Culler, David; Estrin, Deborah

    2006-01-01

    This memo describes the goals and organization structure of the TinyOS Alliance. It covers membership, the working group forums for contribution, intellectual property, source licensing, and the TinyOS Steering Committee (TSC).......This memo describes the goals and organization structure of the TinyOS Alliance. It covers membership, the working group forums for contribution, intellectual property, source licensing, and the TinyOS Steering Committee (TSC)....

  6. Main: IRO2OS [PLACE

    Lifescience Database Archive (English)

    Full Text Available G-box plus G; Transcription factor OsIRO2 is induced exclusively by Fe deficiency; root; shoot; Fe; iron; Oryza sativa (rice) CACGTGG ... ...IRO2OS S000505 15-September-2006 (last modified) kehi OsIRO2-binding core sequence;

  7. Palm webOS

    CERN Document Server

    Allen, Mitch

    2009-01-01

    A Note from the Author and from O'Reilly Media about what this bookdoes--and doesn't--do: Palm webOS is a brand new platform and represents a very different type ofoperating system where the web runtime is used as the basis for the UI andApplication model. Palm and O'Reilly felt that it was important to have abook available to help developers get a basic understanding of the new Palmplatform at the time that the SDK was released; this timing played a majorrole in the content and structure of the book. Ideally this book would have been a complete reference of the new platformbut that wasn't

  8. Applying reliability models to the maintenance of Space Shuttle software

    Science.gov (United States)

    Schneidewind, Norman F.

    1992-01-01

    Software reliability models provide the software manager with a powerful tool for predicting, controlling, and assessing the reliability of software during maintenance. We show how a reliability model can be effectively employed for reliability prediction and the development of maintenance strategies using the Space Shuttle Primary Avionics Software Subsystem as an example.

  9. Reliability Considerations for the Operation of Large Accelerator User Facilities

    CERN Document Server

    Willeke, F.J.

    2016-01-01

    The lecture provides an overview of considerations relevant for achieving highly reliable operation of accelerator based user facilities. The article starts with an overview of statistical reliability formalism which is followed by high reliability design considerations with examples. The article closes with operational aspects of high reliability such as preventive maintenance and spares inventory.

  10. OsRAR1 and OsSGT1 physically interact and function in rice basal disease resistance.

    Science.gov (United States)

    Wang, Yaling; Gao, Mingjun; Li, Qun; Wang, Linyou; Wang, Jianjun; Jeon, Jong-Seong; Qu, Na; Zhang, Yuelin; He, Zuhua

    2008-03-01

    The RAR1 and SGT1 proteins function synergistically or antagonistically in plant innate immune responses. Here, we show that the rice orthologs OsRAR1 and OsSGT1 physically interact in vivo and in yeast. They displayed conserved roles in Arabidopsis disease resistance through ectopic expression in the Arabidopsis rar1 and sgt1 mutants. Overexpression of OsRar1 and OsSGT1 in rice significantly increased basal resistance to a virulent bacterial blight Xanthomonas oryzae pv. oryzae PXO99 but not to another virulent strain DY89031, suggesting race-specific-like basal resistance conferred by OsRar1 and OsSGT1. OsRar1-OE and OsSGT1-OE plants also enhanced resistance to all four virulent blast fungal Magnaporthe oryzae races. Overexpression of the OsSGT1-green fluorescent protein (GFP) fusion most likely caused a dominant negative phenotype which led to race-specific-like basal resistance. Transgenic plants overexpressing OsSGT1-GFP show enhanced resistance to DY89031 but decreased resistance to PXO99, implying that OsSGT1 might be the target of a component required for DY89031 virulence or OsSGT1-GFP might stabilize weak resistance proteins against DY89031. Consistent with the hypothesis of the dominant negative regulation, we observed the reduced sensitivity to auxin of OsSGT1-GFP plants compared with the wild-type ones, and the curling-root phenotype in OsSGT1-OE plants. These results collectively suggest that OsRar1 and OsSGT1 might be differentially required for rice basal disease resistance. Our current study also provides new insight into the roles of OsSGT1 in basal disease resistance.

  11. Structural Reliability Methods

    DEFF Research Database (Denmark)

    Ditlevsen, Ove Dalager; Madsen, H. O.

    of structural reliability, including the theoretical basis for these methods. Partial safety factor codes under current practice are briefly introduced and discussed. A probabilistic code format for obtaining a formal reliability evaluation system that catches the most essential features of the nature...

  12. Hawaii Electric System Reliability

    Energy Technology Data Exchange (ETDEWEB)

    Loose, Verne William [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Silva Monroy, Cesar Augusto [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2012-08-01

    This report addresses Hawaii electric system reliability issues; greater emphasis is placed on short-term reliability but resource adequacy is reviewed in reference to electric consumers’ views of reliability “worth” and the reserve capacity required to deliver that value. The report begins with a description of the Hawaii electric system to the extent permitted by publicly available data. Electrical engineering literature in the area of electric reliability is researched and briefly reviewed. North American Electric Reliability Corporation standards and measures for generation and transmission are reviewed and identified as to their appropriateness for various portions of the electric grid and for application in Hawaii. Analysis of frequency data supplied by the State of Hawaii Public Utilities Commission is presented together with comparison and contrast of performance of each of the systems for two years, 2010 and 2011. Literature tracing the development of reliability economics is reviewed and referenced. A method is explained for integrating system cost with outage cost to determine the optimal resource adequacy given customers’ views of the value contributed by reliable electric supply. The report concludes with findings and recommendations for reliability in the State of Hawaii.

  13. Hawaii electric system reliability.

    Energy Technology Data Exchange (ETDEWEB)

    Silva Monroy, Cesar Augusto; Loose, Verne William

    2012-09-01

    This report addresses Hawaii electric system reliability issues; greater emphasis is placed on short-term reliability but resource adequacy is reviewed in reference to electric consumers' views of reliability %E2%80%9Cworth%E2%80%9D and the reserve capacity required to deliver that value. The report begins with a description of the Hawaii electric system to the extent permitted by publicly available data. Electrical engineering literature in the area of electric reliability is researched and briefly reviewed. North American Electric Reliability Corporation standards and measures for generation and transmission are reviewed and identified as to their appropriateness for various portions of the electric grid and for application in Hawaii. Analysis of frequency data supplied by the State of Hawaii Public Utilities Commission is presented together with comparison and contrast of performance of each of the systems for two years, 2010 and 2011. Literature tracing the development of reliability economics is reviewed and referenced. A method is explained for integrating system cost with outage cost to determine the optimal resource adequacy given customers' views of the value contributed by reliable electric supply. The report concludes with findings and recommendations for reliability in the State of Hawaii.

  14. LED system reliability

    NARCIS (Netherlands)

    Driel, W.D. van; Yuan, C.A.; Koh, S.; Zhang, G.Q.

    2011-01-01

    This paper presents our effort to predict the system reliability of Solid State Lighting (SSL) applications. A SSL system is composed of a LED engine with micro-electronic driver(s) that supplies power to the optic design. Knowledge of system level reliability is not only a challenging scientific

  15. Reliability and Availability of Cloud Computing

    CERN Document Server

    Bauer, Eric

    2012-01-01

    A holistic approach to service reliability and availability of cloud computing Reliability and Availability of Cloud Computing provides IS/IT system and solution architects, developers, and engineers with the knowledge needed to assess the impact of virtualization and cloud computing on service reliability and availability. It reveals how to select the most appropriate design for reliability diligence to assure that user expectations are met. Organized in three parts (basics, risk analysis, and recommendations), this resource is accessible to readers of diverse backgrounds and experience le

  16. Reliability of large and complex systems

    CERN Document Server

    Kolowrocki, Krzysztof

    2014-01-01

    Reliability of Large and Complex Systems, previously titled Reliability of Large Systems, is an innovative guide to the current state and reliability of large and complex systems. In addition to revised and updated content on the complexity and safety of large and complex mechanisms, this new edition looks at the reliability of nanosystems, a key research topic in nanotechnology science. The author discusses the importance of safety investigation of critical infrastructures that have aged or have been exposed to varying operational conditions. This reference provides an asympt

  17. Os perigos da utopia

    Directory of Open Access Journals (Sweden)

    Larry Hufford

    2009-06-01

    Full Text Available

    A utopia pode ter um lado que eleva e um lado sinistro, mas geralmente o lado sinistro acaba destruindo o idealismo inicial. A razão para isto é que os utópicos inevitavelmente adotam uma imagem messiânica do mundo. As três revoluções messiânicas na história—a americana, a francesa e a bolchevique—foram lideradas por homens que pensavem que suas idéias eram universais. Este ensaio examina os escritos do existencialista francês Albert Camus, que argumenta que não existem valores transcendentais, ao mesmo tempo que ele não aceita o niilismo. Camus faz uma distinção entre um rebelde e um revolucionário, e conclui que uma rebelião tentará terminar com uma opressão espedífica, enquanto que uma revolução tentará criar “um novo

  18. Solid State Lighting Reliability Components to Systems

    CERN Document Server

    Fan, XJ

    2013-01-01

    Solid State Lighting Reliability: Components to Systems begins with an explanation of the major benefits of solid state lighting (SSL) when compared to conventional lighting systems including but not limited to long useful lifetimes of 50,000 (or more) hours and high efficacy. When designing effective devices that take advantage of SSL capabilities the reliability of internal components (optics, drive electronics, controls, thermal design) take on critical importance. As such a detailed discussion of reliability from performance at the device level to sub components is included as well as the integrated systems of SSL modules, lamps and luminaires including various failure modes, reliability testing and reliability performance. This book also: Covers the essential reliability theories and practices for current and future development of Solid State Lighting components and systems Provides a systematic overview for not only the state-of-the-art, but also future roadmap and perspectives of Solid State Lighting r...

  19. Structural Reliability Methods

    DEFF Research Database (Denmark)

    Ditlevsen, Ove Dalager; Madsen, H. O.

    The structural reliability methods quantitatively treat the uncertainty of predicting the behaviour and properties of a structure given the uncertain properties of its geometry, materials, and the actions it is supposed to withstand. This book addresses the probabilistic methods for evaluation...... of structural reliability, including the theoretical basis for these methods. Partial safety factor codes under current practice are briefly introduced and discussed. A probabilistic code format for obtaining a formal reliability evaluation system that catches the most essential features of the nature...... of the uncertainties and their interplay is the developed, step-by-step. The concepts presented are illustrated by numerous examples throughout the text....

  20. Desvíos

    Directory of Open Access Journals (Sweden)

    Sánchez Doblado, Manuel

    1992-08-01

    Full Text Available In order to establish connections between the general circulation tracks, and between these and station tracks, devices must be installed on the track which are able to move in a crosswise direction, there by permitting the choice of the appropriate path for the treads. This device in general, is complex and its complexity increases at high speeds (> 200 km/h. Following this, the article deals briefly with some of the solutions adopted to ensure movement on the shunts under optimal safety and comfort conditions, along with the extended useful life of this device in comparison with the conventional railroad.

    Para el establecimiento de las comunicaciones entre las vías generales de circulación, y entre éstas y las del apartado de estaciones, se requiere la instalación de unos aparatos de vía que, dotados de movimiento transversal, permiten establecer adecuadamente la elección del camino de rodadura. El aparato, en general, es complejo, y dicha complejidad se incrementa con la circulación a alta velocidad (V > 200 km/h. A continuación se abordan, de forma sucinta, algunas de las soluciones adoptadas que permiten la circulación por los desvíos en condiciones de seguridad y confort elevados, junto con el alargamiento de su vida útil respecto al ferrocarril convencional.

  1. Os usos da diversidade

    Directory of Open Access Journals (Sweden)

    Clifford Geertz

    1999-05-01

    Full Text Available Resumo Ao discorrer sobre o “Futuro do Etnocentrismo”, este artigo parte da premissa de que a globalização, apesar de ter – em muitos casos – diminuído as diferenças entre povos, não tem amenizado os preconceitos e as formas de discriminação que ocorrem em nome dessas diferenças. Ele resgata a importância do antropólogo neste cenário lembrando que a diversidade cultural faz parte da sociedade complexa, remetendo-se não apenas a grupos étnicos ou nacionais bem delimitados, mas também a diferenças de geração, gênero, sexo e classe, entre outros. Neste contexto, a tolerância passiva de modos distantes de vida assim como a aceitação pragmática de nosso próprio paroquialismo são atitudes não somente intelectualmente desonestas mas também moralmente repreensíveis. É no encontro incômodo de subjetividades variantes na sua própria sociedade que o antropólogo define seu lugar.

  2. Reliable design of electronic equipment an engineering guide

    CERN Document Server

    Natarajan, Dhanasekharan

    2014-01-01

    This book explains reliability techniques with examples from electronics design for the benefit of engineers. It presents the application of de-rating, FMEA, overstress analyses and reliability improvement tests for designing reliable electronic equipment. Adequate information is provided for designing computerized reliability database system to support the application of the techniques by designers. Pedantic terms and the associated mathematics of reliability engineering discipline are excluded for the benefit of comprehensiveness and practical applications. This book offers excellent support

  3. Models of network reliability analysis, combinatorics, and Monte Carlo

    CERN Document Server

    Gertsbakh, Ilya B

    2009-01-01

    Unique in its approach, Models of Network Reliability: Analysis, Combinatorics, and Monte Carlo provides a brief introduction to Monte Carlo methods along with a concise exposition of reliability theory ideas. From there, the text investigates a collection of principal network reliability models, such as terminal connectivity for networks with unreliable edges and/or nodes, network lifetime distribution in the process of its destruction, network stationary behavior for renewable components, importance measures of network elements, reliability gradient, and network optimal reliability synthesis

  4. On Reliability and Validity

    OpenAIRE

    MARTINS, Gilberto de Andrade

    2007-01-01

    In order to assess, evaluate or quantify financial, equity, auditing and controllership oriented data related both to private and public sectors, the practioner or the researcher has to pay close attention to the significance and accurateness criteria of the research tools he is about to employ: validity and reliability. The validity criterion refers to the instrument capacity of assessing what it intends to assess; reliability deals with the constancy of results when the same individual or o...

  5. Beginning Mac OS X Snow Leopard programming

    CERN Document Server

    Trent, Michael

    2010-01-01

    Michael Trent is a technical reviewer for numerous books and magazine articles and the coauthor of Beginning Mac OS X Programming with Drew McCormack. Drew McCormack is an experienced computational scientist, founder of the ""The Mental Faculty""-an independent company developing software for the Mac and iPhone-and the coauthor of Beginning Mac OS X Programming with Michael Trent. Wrox Beginning guides are crafted to make learning programming languages and technologies easier than you think, providing a structured, tutorial format that will guide you through all the techniques involved.

  6. Java and Mac OS X

    CERN Document Server

    Davis, T Gene

    2010-01-01

    Learn the guidelines of integrating Java with native Mac OS X applications with this Devloper Reference book. Java is used to create nearly every type of application that exists and is one of the most required skills of employers seeking computer programmers. Java code and its libraries can be integrated with Mac OS X features, and this book shows you how to do just that. You'll learn to write Java programs on OS X and you'll even discover how to integrate them with the Cocoa APIs.: Shows how Java programs can be integrated with any Mac OS X feature, such as NSView widgets or screen savers; Re

  7. OS X Mavericks for dummies

    CERN Document Server

    LeVitus, Bob

    2013-01-01

    Coast through OS X Mavericks with help from Dr. Mac and For Dummies Ready to make friends with Mavericks? Then, Dr. Mac's your man. Author and longtime Mac guru, Bob "Dr. Mac" LeVitus shares his witty insights and helpful tips in this full-color update to his bestselling OS X guide. You'll learn the basics of working with the Dock, Launchpad, and Mission Control before moving on to setting up your e-mail, surfing with Safari, organizing your files, and customizing OS X Mavericks for all you need your Mac to do. Familiarizes you with OS X essentials like navigating the desktop, connecting to

  8. A reliability measure of protein-protein interactions and a reliability measure-based search engine.

    Science.gov (United States)

    Park, Byungkyu; Han, Kyungsook

    2010-02-01

    Many methods developed for estimating the reliability of protein-protein interactions are based on the topology of protein-protein interaction networks. This paper describes a new reliability measure for protein-protein interactions, which does not rely on the topology of protein interaction networks, but expresses biological information on functional roles, sub-cellular localisations and protein classes as a scoring schema. The new measure is useful for filtering many spurious interactions, as well as for estimating the reliability of protein interaction data. In particular, the reliability measure can be used to search protein-protein interactions with the desired reliability in databases. The reliability-based search engine is available at http://yeast.hpid.org. We believe this is the first search engine for interacting proteins, which is made available to public. The search engine and the reliability measure of protein interactions should provide useful information for determining proteins to focus on.

  9. Gearbox Reliability Collaborative (GRC) Description and Loading

    Energy Technology Data Exchange (ETDEWEB)

    Oyague, F.

    2011-11-01

    This document describes simulated turbine load cases in accordance to the IEC 61400-1 Ed.3 standard, which is representative of the typical wind turbine design process. The information presented herein is intended to provide a broad understanding of the gearbox reliability collaborative 750kW drivetrain and turbine configuration. In addition, fatigue and ultimate strength drivetrain loads resulting from simulations are presented. This information provides the bases for the analytical work of the gearbox reliability collaborative effort.

  10. Telecommunications system reliability engineering theory and practice

    CERN Document Server

    Ayers, Mark L

    2012-01-01

    "Increasing system complexity require new, more sophisticated tools for system modeling and metric calculation. Bringing the field up to date, this book provides telecommunications engineers with practical tools for analyzing, calculating, and reporting availability, reliability, and maintainability metrics. It gives the background in system reliability theory and covers in-depth applications in fiber optic networks, microwave networks, satellite networks, power systems, and facilities management. Computer programming tools for simulating the approaches presented, using the Matlab software suite, are also provided"

  11. Photovoltaic module reliability workshop

    Science.gov (United States)

    Mrig, L.

    The paper and presentations compiled in this volume form the Proceedings of the fourth in a series of Workshops sponsored by Solar Energy Research Institute (SERI/DOE) under the general theme of photovoltaic module reliability during the period 1986 to 1990. The reliability photovoltaic (PV) modules/systems is exceedingly important along with the initial cost and efficiency of modules if the PV technology has to make a major impact in the power generation market, and for it to compete with the conventional electricity producing technologies. The reliability of photovoltaic modules has progressed significantly in the last few years as evidenced by warrantees available on commercial modules of as long as 12 years. However, there is still need for substantial research and testing required to improve module field reliability to levels of 30 years or more. Several small groups of researchers are involved in this research, development, and monitoring activity around the world. In the U.S., PV manufacturers, DOE laboratories, electric utilities and others are engaged in the photovoltaic reliability research and testing. This group of researchers and others interested in this field were brought together under SERI/DOE sponsorship to exchange the technical knowledge and field experience as related to current information in this important field. The papers presented here reflect this effort.

  12. Photovoltaic module reliability workshop

    Energy Technology Data Exchange (ETDEWEB)

    Mrig, L. (ed.)

    1990-01-01

    The paper and presentations compiled in this volume form the Proceedings of the fourth in a series of Workshops sponsored by Solar Energy Research Institute (SERI/DOE) under the general theme of photovoltaic module reliability during the period 1986--1990. The reliability Photo Voltaic (PV) modules/systems is exceedingly important along with the initial cost and efficiency of modules if the PV technology has to make a major impact in the power generation market, and for it to compete with the conventional electricity producing technologies. The reliability of photovoltaic modules has progressed significantly in the last few years as evidenced by warranties available on commercial modules of as long as 12 years. However, there is still need for substantial research and testing required to improve module field reliability to levels of 30 years or more. Several small groups of researchers are involved in this research, development, and monitoring activity around the world. In the US, PV manufacturers, DOE laboratories, electric utilities and others are engaged in the photovoltaic reliability research and testing. This group of researchers and others interested in this field were brought together under SERI/DOE sponsorship to exchange the technical knowledge and field experience as related to current information in this important field. The papers presented here reflect this effort.

  13. Improving Power Converter Reliability

    DEFF Research Database (Denmark)

    Ghimire, Pramod; de Vega, Angel Ruiz; Beczkowski, Szymon

    2014-01-01

    The real-time junction temperature monitoring of a high-power insulated-gate bipolar transistor (IGBT) module is important to increase the overall reliability of power converters for industrial applications. This article proposes a new method to measure the on-state collector?emitter voltage...... of a high-power IGBT module during converter operation, which may play a vital role in improving the reliability of the power converters. The measured voltage is used to estimate the module average junction temperature of the high and low-voltage side of a half-bridge IGBT separately in every fundamental...

  14. Introduction to quality and reliability engineering

    CERN Document Server

    Jiang, Renyan

    2015-01-01

    This book presents the state-of-the-art in quality and reliability engineering from a product life cycle standpoint. Topics in reliability include reliability models, life data analysis and modeling, design for reliability and accelerated life testing, while topics in quality include design for quality, acceptance sampling and supplier selection, statistical process control, production tests such as screening and burn-in, warranty and maintenance. The book provides comprehensive insights into two closely related subjects, and includes a wealth of examples and problems to enhance reader comprehension and link theory and practice. All numerical examples can be easily solved using Microsoft Excel. The book is intended for senior undergraduate and post-graduate students in related engineering and management programs such as mechanical engineering, manufacturing engineering, industrial engineering and engineering management programs, as well as for researchers and engineers in the quality and reliability fields. D...

  15. Niños investigadores

    Directory of Open Access Journals (Sweden)

    Manfred Liebel

    2007-12-01

    Full Text Available EN LA SOCIOLOGÍA INFANTIL, EL PRINCIPIO DE HACER PARTICIPAR A NIÑAS Y NIÑOS en los procesos de investigación está ampliamente reconocido. Tomando como punto de partida ese principio de participación, el presente aporte analiza la pregunta de en qué medida y de qué manera los niños mismos pueden actuar como investigadores. A fin de apreciar en lo justo la perspectiva de los niños, el presente trabajo aboga por que –con el debido acompañamiento de personas adultas– la investigación esté en manos de los niños. Por medio de varios ejemplos de países del Sur, se muestra cómo poner en práctica esta forma de investigación encabezada por niños. Tomando en cuenta la desigualdad en las relaciones entre niñas, niños y personas adultas, el trabajo hace referencia a problemas de ética y práctica investigativa que surgen en el proceso de investigación y también en el tema del uso de los resultados. Finalmente, se explican los beneficios que niñas y niños pueden obtener de sus propias investigaciones.

  16. Structural Reliability Methods

    DEFF Research Database (Denmark)

    Ditlevsen, Ove Dalager; Madsen, H. O.

    The structural reliability methods quantitatively treat the uncertainty of predicting the behaviour and properties of a structure given the uncertain properties of its geometry, materials, and the actions it is supposed to withstand. This book addresses the probabilistic methods for evaluation...

  17. Reliability based structural design

    NARCIS (Netherlands)

    Vrouwenvelder, A.C.W.M.

    2013-01-01

    According to ISO 2394, structures shall be designed, constructed and maintained in such a way that they are suited for their use during the design working life in an economic way. To fulfil this requirement one needs insight into the risk and reliability under expected and non-expected actions. A

  18. The value of reliability

    DEFF Research Database (Denmark)

    Fosgerau, Mogens; Karlström, Anders

    2010-01-01

    We derive the value of reliability in the scheduling of an activity of random duration, such as travel under congested conditions. Using a simple formulation of scheduling utility, we show that the maximal expected utility is linear in the mean and standard deviation of trip duration, regardless...

  19. Reliability and Model Fit

    Science.gov (United States)

    Stanley, Leanne M.; Edwards, Michael C.

    2016-01-01

    The purpose of this article is to highlight the distinction between the reliability of test scores and the fit of psychometric measurement models, reminding readers why it is important to consider both when evaluating whether test scores are valid for a proposed interpretation and/or use. It is often the case that an investigator judges both the…

  20. Reliability of Plastic Slabs

    DEFF Research Database (Denmark)

    Thoft-Christensen, Palle

    1989-01-01

    In the paper it is shown how upper and lower bounds for the reliability of plastic slabs can be determined. For the fundamental case it is shown that optimal bounds of a deterministic and a stochastic analysis are obtained on the basis of the same failure mechanisms and the same stress fields....

  1. Travel time reliability modeling.

    Science.gov (United States)

    2011-07-01

    This report includes three papers as follows: : 1. Guo F., Rakha H., and Park S. (2010), "A Multi-state Travel Time Reliability Model," : Transportation Research Record: Journal of the Transportation Research Board, n 2188, : pp. 46-54. : 2. Park S.,...

  2. Parametric Mass Reliability Study

    Science.gov (United States)

    Holt, James P.

    2014-01-01

    The International Space Station (ISS) systems are designed based upon having redundant systems with replaceable orbital replacement units (ORUs). These ORUs are designed to be swapped out fairly quickly, but some are very large, and some are made up of many components. When an ORU fails, it is replaced on orbit with a spare; the failed unit is sometimes returned to Earth to be serviced and re-launched. Such a system is not feasible for a 500+ day long-duration mission beyond low Earth orbit. The components that make up these ORUs have mixed reliabilities. Components that make up the most mass-such as computer housings, pump casings, and the silicon board of PCBs-typically are the most reliable. Meanwhile components that tend to fail the earliest-such as seals or gaskets-typically have a small mass. To better understand the problem, my project is to create a parametric model that relates both the mass of ORUs to reliability, as well as the mass of ORU subcomponents to reliability.

  3. Reliability of semiology description.

    Science.gov (United States)

    Heo, Jae-Hyeok; Kim, Dong Wook; Lee, Seo-Young; Cho, Jinwhan; Lee, Sang-Kun; Nam, Hyunwoo

    2008-01-01

    Seizure semiology is important for classifying patients' epilepsy. Physicians usually get most of the seizure information from observers though there have been few reports on the reliability of the observers' description. This study aims at determining the reliability of observers' description of the semiology. We included 92 patients who had their habitual seizures recorded during video-EEG monitoring. We compared the semiology described by the observers with that recorded on the videotape, and reviewed which characteristics of the observers affected the reliability of their reported data. The classification of seizures and the individual components of the semiology based only on the observer-description was somewhat discordant compared with the findings from the videotape (correct classification, 85%). The descriptions of some ictal behaviors such as oroalimentary automatism, tonic/dystonic limb posturing, and head versions were relatively accurate, but those of motionless staring and hand automatism were less accurate. The specified directions by the observers were relatively correct. The accuracy of the description was related to the educational level of the observers. Much of the information described by well-educated observers is reliable. However, every physician should keep in mind the limitations of this information and use this information cautiously.

  4. Reliability measurement without limits

    NARCIS (Netherlands)

    Reidsma, Dennis; Carletta, J.

    In computational linguistics, a reliability measurement of 0.8 on some statistic such as $\\kappa$ is widely thought to guarantee that hand-coded data is fit for purpose, with lower values suspect. We demonstrate that the main use of such data, machine learning, can tolerate data with a low

  5. High reliability organizations

    NARCIS (Netherlands)

    Gallis, R.; Zwetsloot, G.I.J.M.

    2014-01-01

    High Reliability Organizations (HRO’s) are organizations that constantly face serious and complex (safety) risks yet succeed in realising an excellent safety performance. In such situations acceptable levels of safety cannot be achieved by traditional safety management only. HRO’s manage safety

  6. Research and design of smart grid monitoring control via terminal based on iOS system

    Science.gov (United States)

    Fu, Wei; Gong, Li; Chen, Heli; Pan, Guangji

    2017-06-01

    Aiming at a series of problems existing in current smart grid monitoring Control Terminal, such as high costs, poor portability, simple monitoring system, poor software extensions, low system reliability when transmitting information, single man-machine interface, poor security, etc., smart grid remote monitoring system based on the iOS system has been designed. The system interacts with smart grid server so that it can acquire grid data through WiFi/3G/4G networks, and monitor each grid line running status, as well as power plant equipment operating conditions. When it occurs an exception in the power plant, incident information can be sent to the user iOS terminal equipment timely, which will provide troubleshooting information to help the grid staff to make the right decisions in a timely manner, to avoid further accidents. Field tests have shown the system realizes the integrated grid monitoring functions, low maintenance cost, friendly interface, high security and reliability, and it possesses certain applicable value.

  7. OS X Mavericks portable genius

    CERN Document Server

    Spivey, Dwight

    2013-01-01

    Plenty of tips, tricks, and shortcuts help you make the most of Apple's newest OS X OS X Mavericks is Apple's newest operating system, with great new ways to enhance your digital lifestyle. This hip, straightforward guide focuses on helping you get everything you want from your Mac. You'll discover how to customize your computer and workspace, troubleshoot and maintain OS X, and have fun browsing and manipulating images and multimedia. You'll listen to music and podcasts, discover how to work with and connect peripherals, copy music to an iPod, add a printer, sync your Mac to other devices, an

  8. OS X Mountain Lion bible

    CERN Document Server

    Gruman, Galen

    2012-01-01

    The complete guide to Mac OS X, fully updated for the newest release! The Mac's solid, powerful operating system and the exploding popularity of iOS devices are fueling a strong increase in market share for Apple. Previous editions of this book have sold more than 75,000 copies, and this new edition is fully updated with all the exciting features of OS X Mountain Lion, including Game Center, Messages, and Notifications. Written by industry expert Galen Gruman, it covers all the basics and then delves deep into professional and higher-end topics, making it the one book you need to succeed with

  9. Professional iOS programming

    CERN Document Server

    van de Put, Peter

    2013-01-01

    Hands-on guidance for programming the next generation of iOS apps If you want to create advanced level iOS apps that get noticed in the App Store, start with this expert book. Written by an international software developer and consultant who has delivered winning solutions for clients all over the world, this professional guide helps you build robust, professional iOS apps at a level that satisfies the demands of clients, companies, and your own creativity. The book includes full source code and invaluable insight from the author's extensive experience. Especially helpful are numerous case st

  10. Estimation of continental 187Os/186Os values by using 187Os/186Os and 143Nd/144Nd ratios in marine manganese nodules

    OpenAIRE

    Turekian, Karl K.; Luck, Jean-Marc

    1984-01-01

    The relationship between 187Os/186Os and 143Nd/144Nd in different manganese nodule fields is used to determine the 187Os/186Os ratio of the continental terrains bounding the major ocean basins. The Atlantic Ocean drainages yield 187Os/186Os of about 11; the Pacific Ocean, between 25 and 36; and the western Indian Ocean, 20. By assuming a two-component continental crust composed of “ultramafic rocks” (high Os concentration, low 187Os/186Os) and “granite” with only radiogenic 187Os produced in ...

  11. Preservation of an Archaean whole rock Re-Os isochron for the Venetia lithospheric mantle: Evidence for rapid crustal recycling and lithosphere stabilisation at 3.3 Ga

    Science.gov (United States)

    van der Meer, Quinten H. A.; Klaver, Martijn; Reisberg, Laurie; Riches, Amy J. V.; Davies, Gareth R.

    2017-11-01

    Re-Os and platinum group element analyses are reported for peridotite xenoliths from the 533 Ma Venetia kimberlite cluster situated in the Limpopo Mobile Belt, the Neoarchaean collision zone between the Kaapvaal and Zimbabwe Cratons. The Venetian xenoliths provide a rare opportunity to examine the state of the cratonic lithosphere prior to major regional metasomatic disturbance of Re-Os systematics throughout the Phanerozoic. The 32 studied xenoliths record Si-enrichment that is characteristic of the Kaapvaal lithospheric mantle and can be subdivided into five groups based on Re-Os analyses. The most pristine group I samples (n = 13) display an approximately isochronous relationship and fall on a 3.28 ± 0.17 Ga (95 % conf. int.) reference line that is based on their mean TMA age. This age overlaps with the formation age of the Limpopo crust at 3.35-3.28 Ga. The group I samples derive from ∼50 to ∼170 km depth, suggesting coeval melt depletion of the majority of the Venetia lithospheric mantle column. Group II and III samples have elevated Re/Os due to Re addition during kimberlite magmatism. Group II has otherwise undergone a similar evolution as the group I samples with overlapping 187Os/188Os at eruption age: 187Os/188OsEA, while group III samples have low Os concentrations, unradiogenic 187Os/188OsEA and were effectively Re-free prior to kimberlite magmatism. The other sample groups (IV and V) have disturbed Re-Os systematics and provide no reliable age information. A strong positive correlation is recorded between Os and Re concentrations for group I samples, which is extended to groups II and III after correction for kimberlite addition. This positive correlation precludes a single stage melt depletion history and indicates coupled remobilisation of Re and Os. The combination of Re-Os mobility, preservation of the isochronous relationship, correlation of 187Os/188Os with degree of melt depletion and lack of radiogenic Os addition puts tight constraints on

  12. Reliability in the utility computing era: Towards reliable Fog computing

    DEFF Research Database (Denmark)

    Madsen, Henrik; Burtschy, Bernard; Albeanu, G.

    2013-01-01

    This paper considers current paradigms in computing and outlines the most important aspects concerning their reliability. The Fog computing paradigm as a non-trivial extension of the Cloud is considered and the reliability of the networks of smart devices are discussed. Combining the reliability...... requirements of grid and cloud paradigms with the reliability requirements of networks of sensor and actuators it follows that designing a reliable Fog computing platform is feasible....

  13. DESAFÍOS AL ORDEN

    Directory of Open Access Journals (Sweden)

    Evangelina De los Rios

    2012-03-01

    Full Text Available Fradkin, Raúl y Gelman, Jorge (Compiladores, Desafíos al Orden. Política y sociedades rurales durante la Revolución de Independencia, Prohistoria ediciones, Rosario, 2008, 157 pp.

  14. [sup 187]Os-[sup 186]Os and [sup 187]Os-[sup 188]Os method of dating: An introduction

    Energy Technology Data Exchange (ETDEWEB)

    Yin, Q.Z.; Jagoutz, E.; Waenke, H. (Max-Planck-Institut fuer Chemie, Mainz (Germany)); Verkhovskiy, A.B. (The Open Univ., Milton Keynes (United Kingdom))

    1993-08-01

    A Re-containing sample is irradiated with thermal neutrons in a nuclear reactor. The following reactions occur with high cross sections: [sup 185]Re(n, [gamma])[sup 186]Re and [sup 187]Re(n, [gamma])[sup 188]Re. Both [sup 186]Re (half-life 90.6 h) and [sup 188]Re (16.7 h) [beta]-decay to the stable isotopes [sup 186]Os and [sup 188]Os. Thus [sup 186]Os and [sup 188]Os are enriched in proportion to the neutron fluence and R/Os ratio of the sample being irradiated. Analyzing merely the isotopic composition of the sample, the authors get two ages that should be consistent. In one irradiated molybdenite sample from Kingsgate molybdenum mine in New South Wales, Australia, the measured [sup 186]Os/[sup 192]Os and [sup 188]Os/[sup 192]Os are 0.3284 and 0.6299, whereas in an unirradiated sample they are assumed to be 0.0390 and 0.3248. These ratios are measurable with negative thermal ionization mass spectrometry (N-TIMS) to a precision of 1[per thousand]. The derived ages for this sample are t[sub 186] = 220.5 [+-] 8.6 Ma and t[sub 188] = 214.9 [+-] 8.9 Ma, respectively (or [+-] 1.4 Ma and [+-] 1.7 Ma, respectively, when excluding the uncertainty of [sup 187]Re half-life). These values are in close agreement with the 221--238 Ma K-Ar ages of the leucogranites emplacement that causes the Mo mineralization at Kingsgate. The major limiting factor on the precision of this age determination is the uncertainty in the half-life of [sup 187]Re. The errors associated with the irradiation parameters are greatly reduced by choosing an appropriate neutron flux monitor. The advantage of this method is that the Re/Os ratio is determined on the same sample and that only one measurement of the isotope composition of osmium is required, thus overcoming some of the experimental difficulties of the conventional Re-Os analysis. The problem of sample inhomogeneity and the need to measure the absolute concentrations of rhenium and osmium are thus eliminated. 30 refs., 3 figs., 1 tab.

  15. Verified OS Interface Code Synthesis

    Science.gov (United States)

    2016-12-01

    AFRL-AFOSR-JP-TR-2017-0015 Verified OS Interface Code Synthesis Gerwin Klein NATIONAL ICT AUSTRALIA LIMITED Final Report 02/14/2017 DISTRIBUTION A...ORGANIZATION NAME(S) AND ADDRESS(ES) NATIONAL ICT AUSTRALIA LIMITED L 5 13 GARDEN ST EVELEIGH, 2015 AU 8. PERFORMING ORGANIZATION REPORT NUMBER 9...public release: distribution unlimited. 1 Introduction The central question of this project was how to ensure the correctness of Operating System (OS

  16. Statis Program Analysis for Reliable, Trusted Apps

    Science.gov (United States)

    2017-02-01

    devices. App stores also provide a tempting vector for an attacker. An attacker can take advantage of bugdoors (software defects that permit...STATIC PROGRAM ANALYSIS FOR RELIABLE, TRUSTED APPS UNIVERSITY OF WASHINGTON FEBRUARY 2017 FINAL TECHNICAL REPORT APPROVED FOR PUBLIC RELEASE...STATIC PROGRAM ANALYSIS FOR RELIABLE, TRUSTED APPS 5a. CONTRACT NUMBER 5b. GRANT NUMBER FA8750-12-2-0107 5c. PROGRAM ELEMENT NUMBER 61101E 6. AUTHOR

  17. Semiconductor packaging materials interaction and reliability

    CERN Document Server

    Chen, Andrea

    2012-01-01

    In semiconductor manufacturing, understanding how various materials behave and interact is critical to making a reliable and robust semiconductor package. Semiconductor Packaging: Materials Interaction and Reliability provides a fundamental understanding of the underlying physical properties of the materials used in a semiconductor package. The book focuses on an important step in semiconductor manufacturing--package assembly and testing. It covers the basics of material properties and explains how to determine which behaviors are important to package performance. The authors also discuss how

  18. Scaled CMOS Technology Reliability Users Guide

    Science.gov (United States)

    White, Mark

    2010-01-01

    The desire to assess the reliability of emerging scaled microelectronics technologies through faster reliability trials and more accurate acceleration models is the precursor for further research and experimentation in this relevant field. The effect of semiconductor scaling on microelectronics product reliability is an important aspect to the high reliability application user. From the perspective of a customer or user, who in many cases must deal with very limited, if any, manufacturer's reliability data to assess the product for a highly-reliable application, product-level testing is critical in the characterization and reliability assessment of advanced nanometer semiconductor scaling effects on microelectronics reliability. A methodology on how to accomplish this and techniques for deriving the expected product-level reliability on commercial memory products are provided.Competing mechanism theory and the multiple failure mechanism model are applied to the experimental results of scaled SDRAM products. Accelerated stress testing at multiple conditions is applied at the product level of several scaled memory products to assess the performance degradation and product reliability. Acceleration models are derived for each case. For several scaled SDRAM products, retention time degradation is studied and two distinct soft error populations are observed with each technology generation: early breakdown, characterized by randomly distributed weak bits with Weibull slope (beta)=1, and a main population breakdown with an increasing failure rate. Retention time soft error rates are calculated and a multiple failure mechanism acceleration model with parameters is derived for each technology. Defect densities are calculated and reflect a decreasing trend in the percentage of random defective bits for each successive product generation. A normalized soft error failure rate of the memory data retention time in FIT/Gb and FIT/cm2 for several scaled SDRAM generations is

  19. Accelerator reliability workshop

    Energy Technology Data Exchange (ETDEWEB)

    Hardy, L.; Duru, Ph.; Koch, J.M.; Revol, J.L.; Van Vaerenbergh, P.; Volpe, A.M.; Clugnet, K.; Dely, A.; Goodhew, D

    2002-07-01

    About 80 experts attended this workshop, which brought together all accelerator communities: accelerator driven systems, X-ray sources, medical and industrial accelerators, spallation sources projects (American and European), nuclear physics, etc. With newly proposed accelerator applications such as nuclear waste transmutation, replacement of nuclear power plants and others. Reliability has now become a number one priority for accelerator designers. Every part of an accelerator facility from cryogenic systems to data storage via RF systems are concerned by reliability. This aspect is now taken into account in the design/budget phase, especially for projects whose goal is to reach no more than 10 interruptions per year. This document gathers the slides but not the proceedings of the workshop.

  20. Human Reliability Program Workshop

    Energy Technology Data Exchange (ETDEWEB)

    Landers, John; Rogers, Erin; Gerke, Gretchen

    2014-05-18

    A Human Reliability Program (HRP) is designed to protect national security as well as worker and public safety by continuously evaluating the reliability of those who have access to sensitive materials, facilities, and programs. Some elements of a site HRP include systematic (1) supervisory reviews, (2) medical and psychological assessments, (3) management evaluations, (4) personnel security reviews, and (4) training of HRP staff and critical positions. Over the years of implementing an HRP, the Department of Energy (DOE) has faced various challenges and overcome obstacles. During this 4-day activity, participants will examine programs that mitigate threats to nuclear security and the insider threat to include HRP, Nuclear Security Culture (NSC) Enhancement, and Employee Assistance Programs. The focus will be to develop an understanding of the need for a systematic HRP and to discuss challenges and best practices associated with mitigating the insider threat.

  1. Laser System Reliability

    Science.gov (United States)

    1977-03-01

    RELIABILITY INTERACTION WITH MANAGEMENT This section describes how reliability, in a general sense, plays Into the overall development of an optimally...8217— "l ’ ^’^Tt^jli^^ D. DEFINITIONS The hierarchy of levels of the physical system breakdown plays an . important role in the total under s t andi...plp2p3p4p5I6 (J). + plp2p3p«ii5W6 * plp2p3W6 * plp2£3V5W6 * hVlVA * ilW2W3V5W6 ; (J) whore , «gain, the (J) symbol Implies that the

  2. Measurement Practices for Reliability and Power Quality

    Energy Technology Data Exchange (ETDEWEB)

    Kueck, JD

    2005-05-06

    This report provides a distribution reliability measurement ''toolkit'' that is intended to be an asset to regulators, utilities and power users. The metrics and standards discussed range from simple reliability, to power quality, to the new blend of reliability and power quality analysis that is now developing. This report was sponsored by the Office of Electric Transmission and Distribution, U.S. Department of Energy (DOE). Inconsistencies presently exist in commonly agreed-upon practices for measuring the reliability of the distribution systems. However, efforts are being made by a number of organizations to develop solutions. In addition, there is growing interest in methods or standards for measuring power quality, and in defining power quality levels that are acceptable to various industries or user groups. The problems and solutions vary widely among geographic areas and among large investor-owned utilities, rural cooperatives, and municipal utilities; but there is still a great degree of commonality. Industry organizations such as the National Rural Electric Cooperative Association (NRECA), the Electric Power Research Institute (EPRI), the American Public Power Association (APPA), and the Institute of Electrical and Electronics Engineers (IEEE) have made tremendous strides in preparing self-assessment templates, optimization guides, diagnostic techniques, and better definitions of reliability and power quality measures. In addition, public utility commissions have developed codes and methods for assessing performance that consider local needs. There is considerable overlap among these various organizations, and we see real opportunity and value in sharing these methods, guides, and standards in this report. This report provides a ''toolkit'' containing synopses of noteworthy reliability measurement practices. The toolkit has been developed to address the interests of three groups: electric power users, utilities, and

  3. Reliability of Circumplex Axes

    Directory of Open Access Journals (Sweden)

    Micha Strack

    2013-06-01

    Full Text Available We present a confirmatory factor analysis (CFA procedure for computing the reliability of circumplex axes. The tau-equivalent CFA variance decomposition model estimates five variance components: general factor, axes, scale-specificity, block-specificity, and item-specificity. Only the axes variance component is used for reliability estimation. We apply the model to six circumplex types and 13 instruments assessing interpersonal and motivational constructs—Interpersonal Adjective List (IAL, Interpersonal Adjective Scales (revised; IAS-R, Inventory of Interpersonal Problems (IIP, Impact Messages Inventory (IMI, Circumplex Scales of Interpersonal Values (CSIV, Support Action Scale Circumplex (SAS-C, Interaction Problems With Animals (IPI-A, Team Role Circle (TRC, Competing Values Leadership Instrument (CV-LI, Love Styles, Organizational Culture Assessment Instrument (OCAI, Customer Orientation Circle (COC, and System for Multi-Level Observation of Groups (behavioral adjectives; SYMLOG—in 17 German-speaking samples (29 subsamples, grouped by self-report, other report, and metaperception assessments. The general factor accounted for a proportion ranging from 1% to 48% of the item variance, the axes component for 2% to 30%; and scale specificity for 1% to 28%, respectively. Reliability estimates varied considerably from .13 to .92. An application of the Nunnally and Bernstein formula proposed by Markey, Markey, and Tinsley overestimated axes reliabilities in cases of large-scale specificities but otherwise works effectively. Contemporary circumplex evaluations such as Tracey’s RANDALL are sensitive to the ratio of the axes and scale-specificity components. In contrast, the proposed model isolates both components.

  4. Wind turbine reliability analysis

    OpenAIRE

    Pinar Pérez, Jesús María; García Márquez, Fausto Pedro; Tobias, Andrew Mark; Papaelias, Mayorkinos

    2013-01-01

    Against the background of steadily increasing wind power generation worldwide, wind turbine manufacturers are continuing to develop a range of configurations with different combinations of pitch control, rotor speeds, gearboxes, generators and converters. This paper categorizes the main designs, focusing on their reliability by bringing together and comparing data from a selection of major studies in the literature. These are not particularly consistent but plotting failure rates against hour...

  5. A cultura da cidade e os seus espaços intermediários: os bares e os restaurantes

    Directory of Open Access Journals (Sweden)

    Ana Sílvia Rocha Ipiranga

    2010-02-01

    Full Text Available A conformação de uma cidade e a organização de seus espaços formam uma base material por meio da qual é possível fazer uma reflexão sobre a gama de sensações e práticas sociais. A cidade, como espaço de interação e hibridismo, constrói e reconstrói no tempo identidades, produz e reflete significados, deslocando a atenção para esses processos sociais. Pressupõe-se que compreender o espaço urbano por meio da consideração da sua cultura e dos seus espaços intermediários – ruas, bairros e equipamentos como os bares e restaurantes – é uma forma de buscar meios de melhor geri-la. Este estudo tem como objetivo descrever os significados culturais atribuídos aos espaços intermediários, envolvendo a emergência de bares e restaurantes em três bairros contíguos de Fortaleza, discutindo os reflexos em termos de desenvolvimento socioterritorial da cidade. Para tanto, foi utilizado como enfoque metodológico uma pesquisa etnográfica, combinando variadas técnicas de coleta. Na análise das informações coletadas, utilizou-se a técnica da análise temática que se insere no conjunto das técnicas da análise de conteúdo. Evidenciaram-se tempos simultâneos e espaços diferenciados, nos quais “lugares” e “não lugares” coexistem significando os “entrelugares” e caracterizando a emergência de espaços intermediários no contexto de uma cidade dividida em duas, rica em simbolismos e interação, fragmentada e solitária, incapaz de compartilhar os códigos culturais, o que sugere desafios à sua gestão.

  6. Beijing 2008: os jogos olímpicos, a cidade e os espaços

    Directory of Open Access Journals (Sweden)

    Otávio Tavares

    2011-06-01

    Full Text Available Este artigo tem como objetivo analisar a organização e o relacionamento dos espaços de Beijing e dos Jogos Olímpicos de 2008. Foi adotado como referência o conceito de 'palco de operação' de Giddens, princípios da microssociologia de Goffman e as categorias da sociologia do espaço de Simmel. Pude observar como os espaços 'olímpicos' tornam-se exclusivos. Suas fronteiras os tornam divididos e delimitados. São fixados para uma determinada expectativa de atuação e para criar uma dimensão sensorial de identidade e temporalidade próprias. Por outro lado, encontramos limites para pensar na fluidez dos espaços. Em conclusão, os Jogos adquirem atributos espaciais que transcendem a identidade da cidade e seu caráter de interação parece estar relacionado ao projeto político do país sede.

  7. iOS and OS X network programming cookbook

    CERN Document Server

    Hoffman, Jon

    2014-01-01

    This book follows a recipe-based approach that will heavily focus on the code and how to integrate the samples with the reader's projects.Each recipe consists of one or more methods that you can put directly into your app and use.This book is ideal for developers that want to create network applications for the Apple OS X or iOS platforms. All examples are written in Objective-C using XCode as the IDE. Knowledge of Objective-C and X-Code is essential.

  8. Reliability assessment using degradation models: bayesian and classical approaches

    Directory of Open Access Journals (Sweden)

    Marta Afonso Freitas

    2010-04-01

    Full Text Available Traditionally, reliability assessment of devices has been based on (accelerated life tests. However, for highly reliable products, little information about reliability is provided by life tests in which few or no failures are typically observed. Since most failures arise from a degradation mechanism at work for which there are characteristics that degrade over time, one alternative is monitor the device for a period of time and assess its reliability from the changes in performance (degradation observed during that period. The goal of this article is to illustrate how degradation data can be modeled and analyzed by using "classical" and Bayesian approaches. Four methods of data analysis based on classical inference are presented. Next we show how Bayesian methods can also be used to provide a natural approach to analyzing degradation data. The approaches are applied to a real data set regarding train wheels degradation.Tradicionalmente, o acesso à confiabilidade de dispositivos tem sido baseado em testes de vida (acelerados. Entretanto, para produtos altamente confiáveis, pouca informação a respeito de sua confiabilidade é fornecida por testes de vida no quais poucas ou nenhumas falhas são observadas. Uma vez que boa parte das falhas é induzida por mecanismos de degradação, uma alternativa é monitorar o dispositivo por um período de tempo e acessar sua confiabilidade através das mudanças em desempenho (degradação observadas durante aquele período. O objetivo deste artigo é ilustrar como dados de degradação podem ser modelados e analisados utilizando-se abordagens "clássicas" e Bayesiana. Quatro métodos de análise de dados baseados em inferência clássica são apresentados. A seguir, mostramos como os métodos Bayesianos podem também ser aplicados para proporcionar uma abordagem natural à análise de dados de degradação. As abordagens são aplicadas a um banco de dados real relacionado à degradação de rodas de trens.

  9. Ultimately Reliable Pyrotechnic Systems

    Science.gov (United States)

    Scott, John H.; Hinkel, Todd

    2015-01-01

    This paper presents the methods by which NASA has designed, built, tested, and certified pyrotechnic devices for high reliability operation in extreme environments and illustrates the potential applications in the oil and gas industry. NASA's extremely successful application of pyrotechnics is built upon documented procedures and test methods that have been maintained and developed since the Apollo Program. Standards are managed and rigorously enforced for performance margins, redundancy, lot sampling, and personnel safety. The pyrotechnics utilized in spacecraft include such devices as small initiators and detonators with the power of a shotgun shell, detonating cord systems for explosive energy transfer across many feet, precision linear shaped charges for breaking structural membranes, and booster charges to actuate valves and pistons. NASA's pyrotechnics program is one of the more successful in the history of Human Spaceflight. No pyrotechnic device developed in accordance with NASA's Human Spaceflight standards has ever failed in flight use. NASA's pyrotechnic initiators work reliably in temperatures as low as -420 F. Each of the 135 Space Shuttle flights fired 102 of these initiators, some setting off multiple pyrotechnic devices, with never a failure. The recent landing on Mars of the Opportunity rover fired 174 of NASA's pyrotechnic initiators to complete the famous '7 minutes of terror.' Even after traveling through extreme radiation and thermal environments on the way to Mars, every one of them worked. These initiators have fired on the surface of Titan. NASA's design controls, procedures, and processes produce the most reliable pyrotechnics in the world. Application of pyrotechnics designed and procured in this manner could enable the energy industry's emergency equipment, such as shutoff valves and deep-sea blowout preventers, to be left in place for years in extreme environments and still be relied upon to function when needed, thus greatly enhancing

  10. CR reliability testing

    Science.gov (United States)

    Honeyman-Buck, Janice C.; Rill, Lynn; Frost, Meryll M.; Staab, Edward V.

    1998-07-01

    The purpose of this work was to develop a method for systematically testing the reliability of a CR system under realistic daily loads in a non-clinical environment prior to its clinical adoption. Once digital imaging replaces film, it will be very difficult to revert back should the digital system become unreliable. Prior to the beginning of the test, a formal evaluation was performed to set the benchmarks for performance and functionality. A formal protocol was established that included all the 62 imaging plates in the inventory for each 24-hour period in the study. Imaging plates were exposed using different combinations of collimation, orientation, and SID. Anthropomorphic phantoms were used to acquire images of different sizes. Each combination was chosen randomly to simulate the differences that could occur in clinical practice. The tests were performed over a wide range of times with batches of plates processed to simulate the temporal constraints required by the nature of portable radiographs taken in the Intensive Care Unit (ICU). Current patient demographics were used for the test studies so automatic routing algorithms could be tested. During the test, only three minor reliability problems occurred, two of which were not directly related to the CR unit. One plate was discovered to cause a segmentation error that essentially reduced the image to only black and white with no gray levels. This plate was removed from the inventory to be replaced. Another problem was a PACS routing problem that occurred when the DICOM server with which the CR was communicating had a problem with disk space. The final problem was a network printing failure to the laser cameras. Although the units passed the reliability test, problems with interfacing to workstations were discovered. The two issues that were identified were the interpretation of what constitutes a study for CR and the construction of the look-up table for a proper gray scale display.

  11. Measurement and Reliability of Response Inhibition

    Directory of Open Access Journals (Sweden)

    Eliza eCongdon

    2012-02-01

    Full Text Available Response inhibition plays a critical role in adaptive functioning and can be assessed with the Stop-signal task, which requires participants to suppress prepotent motor responses. Evidence suggests that this ability to inhibit a motor response that has already been initiated (reflected as Stop-signal reaction time (SSRT is a quantitative and heritable measure of interindividual variation in brain function. In order to examine the reliability of this measure, we pooled data across three separate studies and examined the influence of multiple SSRT calculation methods and outlier calling on reliability (using Intra-class correlation. Our results suggest that an approach which uses the average of all available sessions, all trials of each session, and excludes outliers based on predetermined lenient criteria yields reliable SSRT estimates, while not excluding too many participants. Our findings support the reliability of SSRT as an index of inhibitory control, and provide support for its continued use as a neurocognitive phenotype.

  12. Design for Reliability of Power Electronic Systems

    DEFF Research Database (Denmark)

    Wang, Huai; Ma, Ke; Blaabjerg, Frede

    2012-01-01

    Advances in power electronics enable efficient and flexible processing of electric power in the application of renewable energy sources, electric vehicles, adjustable-speed drives, etc. More and more efforts are devoted to better power electronic systems in terms of reliability to ensure high...... availability, long lifetime, sufficient robustness, low maintenance cost and low cost of energy. However, the reliability predictions are still dominantly according to outdated models and terms, such as MIL-HDBK-217F handbook models, Mean-Time-To-Failure (MTTF), and Mean-Time-Between-Failures (MTBF......). A collection of methodologies based on Physics-of-Failure (PoF) approach and mission profile analysis are presented in this paper to perform reliability-oriented design of power electronic systems. The corresponding design procedures and reliability prediction models are provided. Further on, a case study...

  13. iOS 6 foundations

    CERN Document Server

    Feiler, Jesse

    2013-01-01

    A practical introduction for using iOS 6 to create universal apps If you have prior experience programming in an object-oriented language and are eager to start building universal apps for iPad and iPhone (including the iPod touch), then this is the book for you! Using the latest version of iOS (iOS 6) along with the latest version of Xcode (Xcode 4.5), this book is a practical introduction rather than just a catalog of components. Full-color and packed with groundbreaking, innovative designs, this book teaches you how to create eye-catching, unique apps. Teaches you the va

  14. Blade reliability collaborative :

    Energy Technology Data Exchange (ETDEWEB)

    Ashwill, Thomas D.; Ogilvie, Alistair B.; Paquette, Joshua A.

    2013-04-01

    The Blade Reliability Collaborative (BRC) was started by the Wind Energy Technologies Department of Sandia National Laboratories and DOE in 2010 with the goal of gaining insight into planned and unplanned O&M issues associated with wind turbine blades. A significant part of BRC is the Blade Defect, Damage and Repair Survey task, which will gather data from blade manufacturers, service companies, operators and prior studies to determine details about the largest sources of blade unreliability. This report summarizes the initial findings from this work.

  15. Intrarater reliability of the functional movement screen.

    Science.gov (United States)

    Gribble, Phillip A; Brigle, Jill; Pietrosimone, Brian G; Pfile, Kate R; Webster, Kathryn A

    2013-04-01

    The Functional Movement Screen (FMS) is a tool that quantifies movement patterns as a way to detect performance asymmetries. Although previous study has investigated the reliability of FMS, no current research has examined intrarater reliability or how clinical experience plays a role in the reliability of this tool. In this controlled laboratory study design, repeated measures were used to investigate how experience using the FMS and clinical experience as an athletic trainer (AT) affects the intrarater reliability of FMS testing. Before the data collection, 3 individuals recruited from the university community provided signed informed consent to serve as videotaped models performing the FMS test. The participants (raters) in the study, with different levels of FMS and clinical experience, viewed each of the 3 videotaped models and rated the video models on each exercise of the FMS according to the script that was presented by one of the study investigators. A week later, the participants watched the same videos again, in a different randomized order, and rated each video model on each exercise. After the scores from the participants were collected from both sessions, the intersession scores of the FMS were examined to establish intrarater reliability of all the participants. Additionally, the intrarater reliability of different groups of clinicians and students was compared to make inferences about the influence of clinical experience as an AT along with previous experience using the FMS. The ATs with at least 6 months of experience using the FMS (ATExp group) had the strongest intrarater reliability [intraclass correlation coefficients, ICC (2,1): 0.946], followed by the AT group with moderate reliability [ICC (2,1): 0.771]. This study indicates that intrarater reliability is strong and seems to strengthen when the individuals have experience using the FMS in addition to clinical experience.

  16. Supercomputing Centers and Electricity Service Providers

    DEFF Research Database (Denmark)

    Patki, Tapasya; Bates, Natalie; Ghatikar, Girish

    2016-01-01

    Supercomputing Centers (SCs) have high and variable power demands, which increase the challenges of the Electricity Service Providers (ESPs) with regards to efficient electricity distribution and reliable grid operation. High penetration of renewable energy generation further exacerbates this pro......Supercomputing Centers (SCs) have high and variable power demands, which increase the challenges of the Electricity Service Providers (ESPs) with regards to efficient electricity distribution and reliable grid operation. High penetration of renewable energy generation further exacerbates...

  17. iOS 5 Essentials

    CERN Document Server

    Daniel, Steven F

    2012-01-01

    Each chapter will take you through a new major feature of iOS 5. You will learn how to integrate each feature into your applications. If you ever wanted to learn about the latest features of iOS 5 and learn how to incorporate Twitter, iCloud and Core Image framework effects functionality into your applications, then this book is for you. You should have a good knowledge of programming experience with Objective-C, and have used Xcode 4. iPhone programming experience is not required.

  18. Ultrasound attenuation imaging in the os calcis: an improved method.

    Science.gov (United States)

    Laugier, P; Berger, G; Giat, P; Bonnin-Fayet, P; Laval-Jeantet, M

    1994-04-01

    A complete assessment of the broadband ultrasonic attenuation (BUA) distribution within the os calcis was made using an ultrasonic mechanical scanning device with focused transducers. Measurements were performed on 12 os calces removed from fresh female cadavers. We present the first images of BUA of the os calcis. Reasonably high quality images were obtained compared to computed tomography. The resolution provided by the focused transducers is approximately 4 or 5 mm in the focal zone. Compared to dual energy X-ray absorptiometry (DEXA) or quantitative computed tomography, ultrasound imaging of the os calcis offers the possibility of controlling the placement, size and shape of the region of interest and to use multiple measurement sites. DEXA was used systematically to measure the bone mineral density (BMD) of the os calces. A highly significant correlation between BMD and BUA was found (r = 0.97 p < 0.001).

  19. Os Avanços e os Limites da Queda Recente da Desigualdade no Brasil.

    Directory of Open Access Journals (Sweden)

    Patrícia Andrade de Oliveira e Silva

    2014-08-01

    Full Text Available O presente artigo tem como objetivo analisar os avanços e os limites na análise da queda recente verificada na desigualdade no Brasil. É sabido que durante os anos 2000, a alteração verificada no Índice de Gini teve como efeitos a redução expressiva da pobreza extrema, com um crescimento de quase 20% na renda desses indivíduos. No entanto, apesar da melhora nos rendimentos - derivado da conjugação entre o aquecimento da economia nacional (com expansão do consumo, melhora dos preços relativos e maior atuação das políticas sociais e internacional - alguns trabalhos argumentam que a desigualdade deve ser vista por um prisma multidimensional. Nesse sentido, pretende-se sintetizar e analisar a literatura acerca do tema, demonstrando as suas limitações e propondo novos enfoques para o estudo da realidade brasileira.

  20. Load Control System Reliability

    Energy Technology Data Exchange (ETDEWEB)

    Trudnowski, Daniel [Montana Tech of the Univ. of Montana, Butte, MT (United States)

    2015-04-03

    This report summarizes the results of the Load Control System Reliability project (DOE Award DE-FC26-06NT42750). The original grant was awarded to Montana Tech April 2006. Follow-on DOE awards and expansions to the project scope occurred August 2007, January 2009, April 2011, and April 2013. In addition to the DOE monies, the project also consisted of matching funds from the states of Montana and Wyoming. Project participants included Montana Tech; the University of Wyoming; Montana State University; NorthWestern Energy, Inc., and MSE. Research focused on two areas: real-time power-system load control methodologies; and, power-system measurement-based stability-assessment operation and control tools. The majority of effort was focused on area 2. Results from the research includes: development of fundamental power-system dynamic concepts, control schemes, and signal-processing algorithms; many papers (including two prize papers) in leading journals and conferences and leadership of IEEE activities; one patent; participation in major actual-system testing in the western North American power system; prototype power-system operation and control software installed and tested at three major North American control centers; and, the incubation of a new commercial-grade operation and control software tool. Work under this grant certainly supported the DOE-OE goals in the area of “Real Time Grid Reliability Management.”

  1. Supply chain reliability modelling

    Directory of Open Access Journals (Sweden)

    Eugen Zaitsev

    2012-03-01

    Full Text Available Background: Today it is virtually impossible to operate alone on the international level in the logistics business. This promotes the establishment and development of new integrated business entities - logistic operators. However, such cooperation within a supply chain creates also many problems related to the supply chain reliability as well as the optimization of the supplies planning. The aim of this paper was to develop and formulate the mathematical model and algorithms to find the optimum plan of supplies by using economic criterion and the model for the probability evaluating of non-failure operation of supply chain. Methods: The mathematical model and algorithms to find the optimum plan of supplies were developed and formulated by using economic criterion and the model for the probability evaluating of non-failure operation of supply chain. Results and conclusions: The problem of ensuring failure-free performance of goods supply channel analyzed in the paper is characteristic of distributed network systems that make active use of business process outsourcing technologies. The complex planning problem occurring in such systems that requires taking into account the consumer's requirements for failure-free performance in terms of supply volumes and correctness can be reduced to a relatively simple linear programming problem through logical analysis of the structures. The sequence of the operations, which should be taken into account during the process of the supply planning with the supplier's functional reliability, was presented.

  2. Gate-Level Circuit Reliability Analysis: A Survey

    Directory of Open Access Journals (Sweden)

    Ran Xiao

    2014-01-01

    Full Text Available Circuit reliability has become a growing concern in today’s nanoelectronics, which motivates strong research interest over the years in reliability analysis and reliability-oriented circuit design. While quite a few approaches for circuit reliability analysis have been reported, there is a lack of comparative studies on their pros and cons in terms of both accuracy and efficiency. This paper provides an overview of some typical methods for reliability analysis with focus on gate-level circuits, large or small, with or without reconvergent fanouts. It is intended to help the readers gain an insight into the reliability issues, and their complexity as well as optional solutions. Understanding the reliability analysis is also a first step towards advanced circuit designs for improved reliability in the future research.

  3. OSS reliability measurement and assessment

    CERN Document Server

    Yamada, Shigeru

    2016-01-01

    This book analyses quantitative open source software (OSS) reliability assessment and its applications, focusing on three major topic areas: the Fundamentals of OSS Quality/Reliability Measurement and Assessment; the Practical Applications of OSS Reliability Modelling; and Recent Developments in OSS Reliability Modelling. Offering an ideal reference guide for graduate students and researchers in reliability for open source software (OSS) and modelling, the book introduces several methods of reliability assessment for OSS including component-oriented reliability analysis based on analytic hierarchy process (AHP), analytic network process (ANP), and non-homogeneous Poisson process (NHPP) models, the stochastic differential equation models and hazard rate models. These measurement and management technologies are essential to producing and maintaining quality/reliable systems using OSS.

  4. Travel reliability inventory for Chicago.

    Science.gov (United States)

    2013-04-01

    The overarching goal of this research project is to enable state DOTs to document and monitor the reliability performance : of their highway networks. To this end, a computer tool, TRIC, was developed to produce travel reliability inventories from : ...

  5. Reliability Prediction for Aerospace Electronics

    Science.gov (United States)

    2015-04-20

    semiconductor reliability, VLSI qualification, microelectronics reliability modeling 16. SECURITY CLASSIFICATION OF: 17. LIMITATION OF ABSTRACT...memory, SRAM and DRAM, MEMS and laser programmable metal interconnect. He has licensed his technology and consulted for RFID and SRAM applications

  6. COMO EVOLUEM OS MODELOS MENTAIS

    Directory of Open Access Journals (Sweden)

    A. Tarciso Borges

    Full Text Available Resumo: Após revisão da literatura onde se define o conceito de modelo mental, apresentamos resultados de estudo sobre os modelos mentais de eletricidade, magnetismo e eletromagnetismo de seis grupos de indivíduos. Entre estudantes e profissionais com experiências de escolarização diversificadas, foram entrevistadas 56 pessoas. As entrevistas ocorreram enquanto se realizaram experimentos com imãs, eletroímãs e circuitos elétricos simples. Foram identificados quatro modelos de eletricidade, cinco de magnetismo e três para explicar o magnetismo no eletroímã. Apresentamos os dados desse estudo centrando atenção na evolução dos modelos identificados. Em nossa análise, destacamos quais aspectos dos modelos sofrem mudanças significativas à medida que os sujeitos ganham maior compreensão conceituai e experiência com os fenômenos estudados.

  7. Learning iOS forensics

    CERN Document Server

    Epifani, Mattia

    2015-01-01

    If you are a digital forensics examiner daily involved in the acquisition and analysis of mobile devices and want to have a complete overview of how to perform your work on iOS devices, this book is definitely for you.

  8. niños preescolares

    Directory of Open Access Journals (Sweden)

    Claudia Rosario Portilla Ramírez

    2007-01-01

    Full Text Available Este estudio explora la relación entre la escritura y la comprensión de la referencia a través de una tarea de sinonimia en niños entre 5 y 6 años de edad, de origen latinoamericano, escolarizados en Barcelona (España. Las variables relacionadas con la tarea de sinonimia fueron (a la comprensión de la entidad lingüística nombre y (b el nivel de conceptualización de la escritura de los niños y la presencia de etiquetas escritas durante la tarea. Para la tarea de sinonimia se utilizaron pares de sinónimos dialectales del español (de Latinoamérica y de la Península Ibérica. Los resultados mostraron una diferenciación en el razonamiento de los niños, la cual dependía de la comparación entre lenguaje oral y lenguaje escrito en el desarrollo de la tarea, evidenciando una mayor aceptación de la sinonimia en la modalidad de lenguaje oral que en la modalidad de lenguaje escrito.

  9. Reliability and Its Quantitative Measures

    Directory of Open Access Journals (Sweden)

    Alexandru ISAIC-MANIU

    2010-01-01

    Full Text Available In this article is made an opening for the software reliability issues, through wide-ranging statistical indicators, which are designed based on information collected from operating or testing (samples. It is developed the reliability issues also for the case of the main reliability laws (exponential, normal, Weibull, which validated for a particular system, allows the calculation of some reliability indicators with a higher degree of accuracy and trustworthiness

  10. Medicamentos impróprios para o idoso disponibilizados pelo estado do Rio de Janeiro segundo os critérios de Beers-Fick Inappropriate medications for the elderly provided by the Rio de Janeiro state, Brazil according to the criteria of Beers-Fick

    Directory of Open Access Journals (Sweden)

    Daniel Pereira Rodrigues

    2017-07-01

    Full Text Available Objetivo: Verificar a prevalência de Medicamentos Potencialmente Inapropriados (MPI para idosos entre os disponibilizados na Atenção Primária à Saúde pela Secretaria de Estado da Saúde do Estado do Rio de Janeiro. Método: Trata-se de estudo realizado com dados secundários provenientes da Relação Estadual de Medicamentos (REM e analisado a luz das orientações previstas pela relação de Beers-Fick de 2012. Resultados: Verificou-se que na REM-RJ, de um total de 124 medicamentos, 13,70% (n=17 são considerados MPIs para idosos, com consumo em 2 grandes categorias (que atuam no SNC e periférico = 35,29% e; que atuam no sistema cardiovascular e renal = 29,41%. Conclusão: A presente investigação evidencia a necessidade de se desenvolver critérios alinhados à perspectiva do idoso brasileiro, sendo possível a adaptação dos critérios de Beers-Fick, e a elaboração de súmulas específicas, que contemplem esta população e suas peculiaridades, considerando referenciais de significância científica.

  11. Testing for PV Reliability (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Kurtz, S.; Bansal, S.

    2014-09-01

    The DOE SUNSHOT workshop is seeking input from the community about PV reliability and how the DOE might address gaps in understanding. This presentation describes the types of testing that are needed for PV reliability and introduces a discussion to identify gaps in our understanding of PV reliability testing.

  12. 2017 NREL Photovoltaic Reliability Workshop

    Energy Technology Data Exchange (ETDEWEB)

    Kurtz, Sarah [National Renewable Energy Laboratory (NREL), Golden, CO (United States)

    2017-08-15

    NREL's Photovoltaic (PV) Reliability Workshop (PVRW) brings together PV reliability experts to share information, leading to the improvement of PV module reliability. Such improvement reduces the cost of solar electricity and promotes investor confidence in the technology -- both critical goals for moving PV technologies deeper into the electricity marketplace.

  13. Reliability of goniometric measurements.

    Science.gov (United States)

    Boone, D C; Azen, S P; Lin, C M; Spence, C; Baron, C; Lee, L

    1978-11-01

    This study determined the intratester and intertester variability and reliability of goniometric measurements taken by four physical therapists on upper and lower extremity motions of normal male subjects. The same subjects were measured once weekly for four weeks by testers with varied experience in goniometry. Data were analyzed by analyses of variance with repeated measures. Intratester variation for all measurements was less than intertester variation. Further, intertester variation was less for the three upper extremity motions than for those of the lower extremity. These findings indicate the necessity for using the same tester when effects of treatment are evaluated. When the same tester measures the same movement, increases in joint motion of at least three to four degrees determine improvement for either the upper or lower extremity. When more than one tester, however, measures the same movement, increases in joint motion should exceed five degrees for the upper extremity and six degrees for the lower extremity to determine improvement.

  14. SARA - SURE/ASSIST RELIABILITY ANALYSIS WORKSTATION (UNIX VERSION)

    Science.gov (United States)

    Butler, R. W.

    1994-01-01

    transitions. The ASSIST program also includes model-reduction techniques to facilitate efficient modeling of large systems. The semi-Markov model generated by ASSIST is in the format needed for input to SURE and PAWS/STEM. The Semi-Markov Unreliability Range Evaluator, SURE, is an analysis tool for reconfigurable, fault-tolerant systems. SURE provides an efficient means for calculating accurate upper and lower bounds for the death state probabilities for a large class of semi-Markov models, not just those which can be reduced to critical-pair architectures. The calculated bounds are close enough (usually within 5 percent of each other) for use in reliability studies of ultra-reliable computer systems. The SURE bounding theorems have algebraic solutions and are consequently computationally efficient even for large and complex systems. SURE can optionally regard a specified parameter as a variable over a range of values, enabling an automatic sensitivity analysis. SURE output is tabular. The PAWS/STEM package includes two programs for the creation and evaluation of pure Markov models describing the behavior of fault-tolerant reconfigurable computer systems: the Pade Approximation with Scaling (PAWS) and Scaled Taylor Exponential Matrix (STEM) programs. PAWS and STEM produce exact solutions for the probability of system failure and provide a conservative estimate of the number of significant digits in the solution. Markov models of fault-tolerant architectures inevitably lead to numerically stiff differential equations. Both PAWS and STEM have the capability to solve numerically stiff models. These complementary programs use separate methods to determine the matrix exponential in the solution of the model's system of differential equations. In general, PAWS is better suited to evaluate small and dense models. STEM operates at lower precision, but works faster than PAWS for larger models. The programs that comprise the SARA package were originally developed for use on DEC VAX

  15. Determination of (187)Os in molybdenite by ICP-MS with neutron-induced (186)Os and (188)Os spikes.

    Science.gov (United States)

    Qu, W; Du, A; Zhao, D

    2001-10-31

    The article describes a method for the determination of (187)Os in molybdenite by isotope dilution inductively coupled plasma-mass spectrometry (ID-ICP-MS) with neutron-induced (186)Os and (188)Os spike. The spike used in the present work was prepared in line with the principle by which artificial nuclides are produced in a nuclear reaction. The concentration and isotopic composition of osmium in the prepared spike were evaluated accurately with the isotope dilution method, using negative thermal ion mass spectrometry (N-TIMS). The advantage of this method is that using (186)Os and (188)Os double spikes can effectively compensate for the mass discrimination effects of ICP-MS. Thus, the common correction practice for mass bias in the isotope dilution method with a single spike is unnecessary. In addition, the method enables one to reduce the determined error arising from instrumental instability. The precision for the (187)Os/((186)Os+(188)Os) ratio was approximately 2% (2sigma, RSD), but in the case of (187)Os/(186)Os, (187)Os/(188)Os and (186)Os/(188)Os, precision ranged from 2.0 to 8% (2sigma, RSD). The results for (187)Os concentration in a molybdenite sample determined with this method showed good agreement with reference values.

  16. CARES/PC - CERAMICS ANALYSIS AND RELIABILITY EVALUATION OF STRUCTURES

    Science.gov (United States)

    Szatmary, S. A.

    1994-01-01

    The beneficial properties of structural ceramics include their high-temperature strength, light weight, hardness, and corrosion and oxidation resistance. For advanced heat engines, ceramics have demonstrated functional abilities at temperatures well beyond the operational limits of metals. This is offset by the fact that ceramic materials tend to be brittle. When a load is applied, their lack of significant plastic deformation causes the material to crack at microscopic flaws, destroying the component. CARES/PC performs statistical analysis of data obtained from the fracture of simple, uniaxial tensile or flexural specimens and estimates the Weibull and Batdorf material parameters from this data. CARES/PC is a subset of the program CARES (COSMIC program number LEW-15168) which calculates the fast-fracture reliability or failure probability of ceramic components utilizing the Batdorf and Weibull models to describe the effects of multi-axial stress states on material strength. CARES additionally requires that the ceramic structure be modeled by a finite element program such as MSC/NASTRAN or ANSYS. The more limited CARES/PC does not perform fast-fracture reliability estimation of components. CARES/PC estimates ceramic material properties from uniaxial tensile or from three- and four-point bend bar data. In general, the parameters are obtained from the fracture stresses of many specimens (30 or more are recommended) whose geometry and loading configurations are held constant. Parameter estimation can be performed for single or multiple failure modes by using the least-squares analysis or the maximum likelihood method. Kolmogorov-Smirnov and Anderson-Darling goodness-of-fit tests measure the accuracy of the hypothesis that the fracture data comes from a population with a distribution specified by the estimated Weibull parameters. Ninety-percent confidence intervals on the Weibull parameters and the unbiased value of the shape parameter for complete samples are provided

  17. Reliability and Failure in NASA Missions: Blunders, Normal Accidents, High Reliability, Bad Luck

    Science.gov (United States)

    Jones, Harry W.

    2015-01-01

    NASA emphasizes crew safety and system reliability but several unfortunate failures have occurred. The Apollo 1 fire was mistakenly unanticipated. After that tragedy, the Apollo program gave much more attention to safety. The Challenger accident revealed that NASA had neglected safety and that management underestimated the high risk of shuttle. Probabilistic Risk Assessment was adopted to provide more accurate failure probabilities for shuttle and other missions. NASA's "faster, better, cheaper" initiative and government procurement reform led to deliberately dismantling traditional reliability engineering. The Columbia tragedy and Mars mission failures followed. Failures can be attributed to blunders, normal accidents, or bad luck. Achieving high reliability is difficult but possible.

  18. Mathematical reliability an expository perspective

    CERN Document Server

    Mazzuchi, Thomas; Singpurwalla, Nozer

    2004-01-01

    In this volume consideration was given to more advanced theoretical approaches and novel applications of reliability to ensure that topics having a futuristic impact were specifically included. Topics like finance, forensics, information, and orthopedics, as well as the more traditional reliability topics were purposefully undertaken to make this collection different from the existing books in reliability. The entries have been categorized into seven parts, each emphasizing a theme that seems poised for the future development of reliability as an academic discipline with relevance. The seven parts are networks and systems; recurrent events; information and design; failure rate function and burn-in; software reliability and random environments; reliability in composites and orthopedics, and reliability in finance and forensics. Embedded within the above are some of the other currently active topics such as causality, cascading, exchangeability, expert testimony, hierarchical modeling, optimization and survival...

  19. Reliability Modeling of Wind Turbines

    DEFF Research Database (Denmark)

    Kostandyan, Erik

    components. Thus, models of reliability should be developed and applied in order to quantify the residual life of the components. Damage models based on physics of failure combined with stochastic models describing the uncertain parameters are imperative for development of cost-optimal decision tools...... for Operation & Maintenance planning. Concentrating efforts on development of such models, this research is focused on reliability modeling of Wind Turbine critical subsystems (especially the power converter system). For reliability assessment of these components, structural reliability methods are applied....... Further, reliability modeling of load sharing systems is considered and a theoretical model is proposed based on sequential order statistics and structural systems reliability methods. Procedures for reliability estimation are detailed and presented in a collection of research papers....

  20. Synthesis of Reliable Telecommunication Networks

    Directory of Open Access Journals (Sweden)

    Dusan Trstensky

    2005-01-01

    Full Text Available In many application, the network designer may to know to senthesise a reliable telecommunication network. Assume that a network, denoted Gm,e has the number of nodes n and the number of edges e, and the operational probability of each edge is known. The system reliability of the network is defined to be the reliability that every pair of nodes can communicate with each other. A network synthesis problem considered in this paper is to find a network G*n,e, that maximises system reliability over the class of all networks for the classes of networks Gn,n-1, Gn,m and Gn,n+1 respectively. In addition an upper bound of maximum reliability for the networks with n-node and e-edge (e>n+2 is derived in terms of node. Computational experiments for the reliability upper are also presented. the results show, that the proposed reliability upper bound is effective.

  1. Estimation of continental 187Os/186Os values by using 187Os/186Os and 143Nd/144Nd ratios in marine manganese nodules

    Science.gov (United States)

    Turekian, Karl K.; Luck, Jean-Marc

    1984-01-01

    The relationship between 187Os/186Os and 143Nd/144Nd in different manganese nodule fields is used to determine the 187Os/186Os ratio of the continental terrains bounding the major ocean basins. The Atlantic Ocean drainages yield 187Os/186Os of about 11; the Pacific Ocean, between 25 and 36; and the western Indian Ocean, 20. By assuming a two-component continental crust composed of “ultramafic rocks” (high Os concentration, low 187Os/186Os) and “granite” with only radiogenic 187Os produced in accessory Re-bearing molybdenite, the ultramafic contribution to weathering is about 0.2%. Some or most of this may come from the alteration of oceanic ultramafics. PMID:16578780

  2. Estimation of continental Os/Os values by using Os/Os and Nd/Nd ratios in marine manganese nodules.

    Science.gov (United States)

    Turekian, K K; Luck, J M

    1984-12-01

    The relationship between (187)Os/(186)Os and (143)Nd/(144)Nd in different manganese nodule fields is used to determine the (187)Os/(186)Os ratio of the continental terrains bounding the major ocean basins. The Atlantic Ocean drainages yield (187)Os/(186)Os of about 11; the Pacific Ocean, between 25 and 36; and the western Indian Ocean, 20. By assuming a two-component continental crust composed of "ultramafic rocks" (high Os concentration, low (187)Os/(186)Os) and "granite" with only radiogenic (187)Os produced in accessory Re-bearing molybdenite, the ultramafic contribution to weathering is about 0.2%. Some or most of this may come from the alteration of oceanic ultramafics.

  3. Building iPhone OS Accessories

    CERN Document Server

    Maskrey, Ken

    2010-01-01

    This book provides a serious, in-depth look at Apple's External Accessory Framework and the iPhone Accessories API. You'll learn how to create new, integrated solutions that combine iPhone apps with dedicated hardware. The iPhone OS Accessories API expands the opportunities for innovative iPhone developers, allowing you to control and monitor external devices, whether you've built them yourself or obtained them from a third party. What you'll learn * Develop accessories and apps for the iPhone and iPod touch. * Use Apple's External Accessory Framework to create hardware/software interaction. *

  4. 77 FR 24594 - Version 4 Critical Infrastructure Protection Reliability Standards

    Science.gov (United States)

    2012-04-25

    ... Standards provide a cybersecurity framework for the identification and protection of ``Critical Cyber Assets... Reliability Standards. The CIP Reliability Standards provide a cybersecurity framework for the identification... rating of 1000 MVAR or greater'' shall be designated as a Critical Asset. Criterion 1.3 designates as...

  5. Human Reliability Analysis for Design: Using Reliability Methods for Human Factors Issues

    Energy Technology Data Exchange (ETDEWEB)

    Ronald Laurids Boring

    2010-11-01

    This paper reviews the application of human reliability analysis methods to human factors design issues. An application framework is sketched in which aspects of modeling typically found in human reliability analysis are used in a complementary fashion to the existing human factors phases of design and testing. The paper provides best achievable practices for design, testing, and modeling. Such best achievable practices may be used to evaluate and human system interface in the context of design safety certifications.

  6. Os Odontoideum: Rare Cervical Lesion

    Directory of Open Access Journals (Sweden)

    Kristie A Robson

    2011-05-01

    Full Text Available We report the case of a 22-year-old Marine who presented to the emergency department, after a martial arts exercise, with transient weakness and numbness in all extremities. Computed tomography cervical spine radiographs revealed os odontoideum. Lateral flexion–extension radiographs identified atlanto-axillary instability. This abnormality is rare and can be career ending for military members who do not undergo surgical fusion. [West J Emerg Med. 2011;12(4:520–522.

  7. Failure Definition for Structural Reliability Assessment

    Science.gov (United States)

    2002-09-01

    This study provides methodologies for defining failure for reliability-based, marine structural design and analysis. Structural reliability methods allow the prediction of an occurrence likelihood for a particular event of interest (for example, structural failure), allowing the designer to limit the probability of undesirable events. Changes to the traditional serviceability failure definitions are not possible without addressing the costs associated with the failures, either subjectively or objectively. A framework is provided by which this may be accomplished in the future. This study begins with a review and description of structural reliability methodologies as they have been applied to ship structure. Uncertainty types are then explored for information and tools used in a reliability prediction. Types of failure modes are described as reported in literature. These types are then expanded upon to establish classes of failure modes, leading to a methodology for formulating the range of failure definitions. Failure definition examples are provided for the hull girder and structural components at both the ultimate and serviceability types of failure. Finally, recommendations are made to provide guidance on applications and future research in this topic area.

  8. Programming iOS 6

    CERN Document Server

    Neuburg, Matt

    2013-01-01

    Get a solid grounding in all the fundamentals of Cocoa Touch, and avoid problems during iPhone and iPad app development. With this revised and expanded edition, you'll dig into Cocoa and learn how to work effectively with Objective-C and Xcode. This book covers iOS 6 in a rigorous, orderly fashion-ideal whether you're approaching iOS for the first time or need a reference to bolster existing skills. Learn about features introduced with iOS 6, including Objective-C language advances, autosynthesis, autolayout, new view controller rotation rules, unwind segues, state restoration, styled text, and collection views. * Learn Objective-C language details and object-oriented programming concepts * Understand the anatomy of an Xcode project and all the stages of its lifecycle * Grasp key Cocoa concepts such as relationships between classes, receiving events, and model-view-controller architecture * Learn how views and layers are managed, drawn, composited, and animated * Become familiar with view controllers and thei...

  9. Os Sentidos: jardins e paisagens

    Directory of Open Access Journals (Sweden)

    Schirley Fátima Nogueira da Silva Cavalcante Alves

    2010-06-01

    Full Text Available Os sentidos permitem aos seres vivos a capacidade de perpecepção, principalmente de características do meio ambiente, por meio de sensações de origem interna ou externa. Até a algum tempo, apenas se relacionava a jardins e paisagens os cinco sentidos básicos: visão, audição, olfato, tato e gosto. Mas, com a evolução do conceito da paisagem, também se aumentou a abrangência dos seus sentidos, indo além desse conjunto das sensações humanas,  sendo incluídas também as relações sociais, culturais e econômicas. Os jardins e paisagens passam a se manifestar como um conjunto de representações estruturadas e caracterizadas por forte impregnação emocional e cultural, desencadeando no homem sensações nascidas da relação entre sua trajetória histórica e cultural.

  10. OS friendly microprocessor architecture: Hardware level computer security

    Science.gov (United States)

    Jungwirth, Patrick; La Fratta, Patrick

    2016-05-01

    We present an introduction to the patented OS Friendly Microprocessor Architecture (OSFA) and hardware level computer security. Conventional microprocessors have not tried to balance hardware performance and OS performance at the same time. Conventional microprocessors have depended on the Operating System for computer security and information assurance. The goal of the OS Friendly Architecture is to provide a high performance and secure microprocessor and OS system. We are interested in cyber security, information technology (IT), and SCADA control professionals reviewing the hardware level security features. The OS Friendly Architecture is a switched set of cache memory banks in a pipeline configuration. For light-weight threads, the memory pipeline configuration provides near instantaneous context switching times. The pipelining and parallelism provided by the cache memory pipeline provides for background cache read and write operations while the microprocessor's execution pipeline is running instructions. The cache bank selection controllers provide arbitration to prevent the memory pipeline and microprocessor's execution pipeline from accessing the same cache bank at the same time. This separation allows the cache memory pages to transfer to and from level 1 (L1) caching while the microprocessor pipeline is executing instructions. Computer security operations are implemented in hardware. By extending Unix file permissions bits to each cache memory bank and memory address, the OSFA provides hardware level computer security.

  11. Within-Subject Reliability and between-Subject Variability of Oxidative Stress Markers in Saliva of Healthy Subjects: A Longitudinal Pilot Study

    Directory of Open Access Journals (Sweden)

    Iva Z. Alajbeg

    2017-01-01

    Full Text Available The present study evaluated diurnal variations and day-to-day fluctuations of salivary oxidative stress (OS markers in healthy adult individuals. Whole unstimulated saliva was collected at 2 time intervals over 3 consecutive days. Glutathione peroxidase (GPX, superoxide dismutase (SOD, total antioxidant capacity (TAC, and uric acid (UA were analyzed using spectrophotometric methods, while 8-hydroxydeoxyguanosine (8-OHdG and malondialdehyde (MDA were determined using immunoassays. No significant differences for salivary OS markers between men and women were observed. For all examined OS markers, no significant day-to-day variations were demonstrated. Significant diurnal variations were found in salivary GPX, TAC and MDA levels. For SOD, TAC, GPX, and UA, good-to-moderate intraindividual coefficients of variations (CVs were observed in more than 75% of the subjects. For MDA and 8-OHdG, intraindividual CVs > 35% were observed in 60% and 40% of the subjects, respectively. Between-subject variance was wide for all examined OS markers (CV% 30.08%–85.70%. Due to high intraindividual variability in the salivary concentrations of MDA and 8-OHdG, those markers cannot be reliably verified based on single measurements and multiple measurements over several days would provide more reliable information. Salivary SOD, TAC, GPX, and UA proved stable across three days of measurement. Trial Registration. ClinicalTrials.gov NCT03029494. Registered on 2017-01-19.

  12. Transcutaneous bilirubinometer: intermeter reliability.

    Science.gov (United States)

    Brown, L P; Arnold, L; Allison, D; Jacobsen, B; Klein, M E; Charsha, D

    1990-06-01

    This study examined intermeter reliability on two transcutaneous bilirubinometers on 30 white prephototherapy infants between 36 and 42 weeks' gestation with birthweights greater than 2500 g. All infants were screened with both meters, on the forehead, within a 5-minute period. Meter readings were taken within 30 minutes following infant heelstick for serum bilirubin. The Pearson correlations between serum bilirubin and jaundice meter measurements were .75 for meter 1 and .76 for meter 2. The correlation between jaundice meter indices from the two meters was .87, leaving 13% of the variance in one meter not accounted for by the correlation with the other meter. An examination of the differences between the two meters revealed that in the upper range (greater than or equal to 16) meter 1 was always higher than meter 2 by, on the average, 2.6 points (SD = 1.3). In readings of 15 or less, the differences between the meters were inconsistent. Additionally, in 16 of 30 cases, the action levels from the two meters led to the same conclusion; in the remaining 14 cases, meter 1 gave a positive reading (indicating the need to determine serum bilirubin) while meter 2 gave an equivocal reading (indicating user discretion in deciding whether serum bilirubin should be determined). These data indicate that each meter should be individually evaluated to determine action indices, and that jaundice meters should not be used interchangeably on the same infant.

  13. Reliability of Oronasal Fistula Classification.

    Science.gov (United States)

    Sitzman, Thomas J; Allori, Alexander C; Matic, Damir B; Beals, Stephen P; Fisher, David M; Samson, Thomas D; Marcus, Jeffrey R; Tse, Raymond W

    2018-01-01

    Objective Oronasal fistula is an important complication of cleft palate repair that is frequently used to evaluate surgical quality, yet reliability of fistula classification has never been examined. The objective of this study was to determine the reliability of oronasal fistula classification both within individual surgeons and between multiple surgeons. Design Using intraoral photographs of children with repaired cleft palate, surgeons rated the location of palatal fistulae using the Pittsburgh Fistula Classification System. Intrarater and interrater reliability scores were calculated for each region of the palate. Participants Eight cleft surgeons rated photographs obtained from 29 children. Results Within individual surgeons reliability for each region of the Pittsburgh classification ranged from moderate to almost perfect (κ = .60-.96). By contrast, reliability between surgeons was lower, ranging from fair to substantial (κ = .23-.70). Between-surgeon reliability was lowest for the junction of the soft and hard palates (κ = .23). Within-surgeon and between-surgeon reliability were almost perfect for the more general classification of fistula in the secondary palate (κ = .95 and κ = .83, respectively). Conclusions This is the first reliability study of fistula classification. We show that the Pittsburgh Fistula Classification System is reliable when used by an individual surgeon, but less reliable when used among multiple surgeons. Comparisons of fistula occurrence among surgeons may be subject to less bias if they use the more general classification of "presence or absence of fistula of the secondary palate" rather than the Pittsburgh Fistula Classification System.

  14. Dependent systems reliability estimation by structural reliability approach

    DEFF Research Database (Denmark)

    Kostandyan, Erik; Sørensen, John Dalsgaard

    2014-01-01

    Estimation of system reliability by classical system reliability methods generally assumes that the components are statistically independent, thus limiting its applicability in many practical situations. A method is proposed for estimation of the system reliability with dependent components, where...... the leading failure mechanism(s) is described by physics of failure model(s). The proposed method is based on structural reliability techniques and accounts for both statistical and failure effect correlations. It is assumed that failure of any component is due to increasing damage (fatigue phenomena...

  15. Reliability of digital reactor protection system based on extenics.

    Science.gov (United States)

    Zhao, Jing; He, Ya-Nan; Gu, Peng-Fei; Chen, Wei-Hua; Gao, Feng

    2016-01-01

    After the Fukushima nuclear accident, safety of nuclear power plants (NPPs) is widespread concerned. The reliability of reactor protection system (RPS) is directly related to the safety of NPPs, however, it is difficult to accurately evaluate the reliability of digital RPS. The method is based on estimating probability has some uncertainties, which can not reflect the reliability status of RPS dynamically and support the maintenance and troubleshooting. In this paper, the reliability quantitative analysis method based on extenics is proposed for the digital RPS (safety-critical), by which the relationship between the reliability and response time of RPS is constructed. The reliability of the RPS for CPR1000 NPP is modeled and analyzed by the proposed method as an example. The results show that the proposed method is capable to estimate the RPS reliability effectively and provide support to maintenance and troubleshooting of digital RPS system.

  16. Surface engineering for MEMS reliability

    Science.gov (United States)

    Ashurst, William Robert

    The integration of miniaturized mechanical components with microelectronic components has spawned a new technology known as microelectromechanical systems (MEMS). This technology extends the benefits of microelectronic fabrication to sensing and actuating functions. Examples of MEMS devices that have been commercially produced include relatively simple mechanisms such as accelerometers, pressure sensors and digital mirror projectors. Despite recent progress in micromachining capability, the realization of more complex commercial and specialized use of MEMS is challenged due to plaguing reliability issues. Barriers to the widespread commercialization and development of MEMS technologies are steep and require engineering at the molecular level. Reliability issues which commonly limit MEMS to the research level include (but are not limited to) adhesion (also referred to as "stiction") and wear. The goal of this work is to improve MEMS reliability by developing new processes and techniques that allow the study of adhesion and wear, that are industrially favorable and that are process compatible with MEMS fabrication schemes. A "tribology chip" has been developed which employs a variety of standard micromechanical test instruments as well as new devices. Also, a liquid based anti-adhesion coating process for MEMS which utilizes non-chlorosilane chemistry is developed. This octadecene based coating process is simpler than the standard chlorosilane processes, and circumvents a number of limitations imposed by chlorosilane chemistry. In order to provide a manufacturable anti-adhesion process, a new vapor phase coating method has been developed. This method is based on chlorosilane chemistry, specifically dichlorodimethylsilane, and has been shown to be effective at reducing adhesion in fully packaged devices at the wafer scale. To address the issue of wear, novel methods of producing films of silicon carbide as coatings for existing polysilicon micromachines have been

  17. Climatic Reliability of Electronic Devices and Components

    DEFF Research Database (Denmark)

    Ambat, Rajan

    2014-01-01

    This article provides an overview of the climatic reliability issues of electronic devices and components with a focus on the metals/alloys usage on PCB a surface together with cleanliness issues, humidity interaction on PCB a surface, and PCB a design and device design aspects. The miniaturization...... of electronic systems and the explosive increase in their usage has increased the climatic reliability issues of electronics devices and components, especially when metal/alloy parts are exposed on the PCB assembly surface or embedded within the multilayer laminate. Problems are compounded by the fact...

  18. Reliability engineering theory and practice

    CERN Document Server

    Birolini, Alessandro

    2014-01-01

    This book shows how to build in, evaluate, and demonstrate reliability and availability of components, equipment, systems. It presents the state-of-theart of reliability engineering, both in theory and practice, and is based on the author's more than 30 years experience in this field, half in industry and half as Professor of Reliability Engineering at the ETH, Zurich. The structure of the book allows rapid access to practical results. This final edition extend and replace all previous editions. New are, in particular, a strategy to mitigate incomplete coverage, a comprehensive introduction to human reliability with design guidelines and new models, and a refinement of reliability allocation, design guidelines for maintainability, and concepts related to regenerative stochastic processes. The set of problems for homework has been extended. Methods & tools are given in a way that they can be tailored to cover different reliability requirement levels and be used for safety analysis. Because of the Appendice...

  19. Reliability of Wireless Sensor Networks

    Science.gov (United States)

    Dâmaso, Antônio; Rosa, Nelson; Maciel, Paulo

    2014-01-01

    Wireless Sensor Networks (WSNs) consist of hundreds or thousands of sensor nodes with limited processing, storage, and battery capabilities. There are several strategies to reduce the power consumption of WSN nodes (by increasing the network lifetime) and increase the reliability of the network (by improving the WSN Quality of Service). However, there is an inherent conflict between power consumption and reliability: an increase in reliability usually leads to an increase in power consumption. For example, routing algorithms can send the same packet though different paths (multipath strategy), which it is important for reliability, but they significantly increase the WSN power consumption. In this context, this paper proposes a model for evaluating the reliability of WSNs considering the battery level as a key factor. Moreover, this model is based on routing algorithms used by WSNs. In order to evaluate the proposed models, three scenarios were considered to show the impact of the power consumption on the reliability of WSNs. PMID:25157553

  20. MedAd-AppQ: A quality assessment tool for medication adherence apps on iOS and android platforms.

    Science.gov (United States)

    Ali, Eskinder Eshetu; Teo, Amanda Kai Sin; Goh, Sherlyn Xue Lin; Chew, Lita; Yap, Kevin Yi-Lwern

    2018-02-02

    With the recent proliferation of smartphone medication adherence applications (apps), it is increasingly more difficult for patients and clinicians to identify the most useful app. To develop a quality assessment tool for medication adherence apps, and evaluate the quality of such apps from the major app stores. In this study, a Medication Adherence App Quality assessment tool (MedAd-AppQ) was developed and two evaluators independently assessed apps that fulfilled the following criteria: availability in English, had at least a medication reminder feature, non-specific to certain disease conditions (generic apps), free of technical malfunctions and availability on both the iPhone Operating System (iOS) and Android platforms. Descriptive statistics, Mann-Whitney U test, Pearson product moment correlation and Spearman rank-order correlation were used for statistical analysis. MedAd-AppQ was designed to have 24 items (total 43 points) categorized under three sections: content reliability (11 points), feature usefulness (29 points) and feature convenience (3 points). The three sections of MedAd-AppQ were found to have inter-rater correlation coefficients of 0.801 (p-value iOS and 25 Android), quality scores ranged between 7/43 (16.3%) and 28/43 (65.1%). There was no significant difference between the quality scores of the Android and iOS versions. None of the apps had features for self-management of side effects. Only two apps in each platform provided disease-related and/or medication information. MedAd-AppQ can be used to reliably assess the quality of adherence apps. Clinicians can use the tool in selecting apps for use by patients. Developers of adherence apps should consider features that provide therapy-related information and help patients in medications and side-effects management. Copyright © 2018 Elsevier Inc. All rights reserved.

  1. Assessing the Reliability of NDE

    Science.gov (United States)

    Roth, Don J.

    1987-01-01

    Versatile FORTRAN computer algorithm developed for calculating and plotting reliability of nondestructive evaluation (NDE) technique for inspection of flaws. Developed specifically to determine reliability of radiographic and ultrasonic methods for detection of critical flaws in structural ceramic materials. Reliability displayed in form of plot of probability of detection versus flaw size. NDE methods used in such applications as diagnostic medicine, quality control in industrial production, and prediction of failure in structural components.

  2. Wikipedia : its reliability and social role

    Science.gov (United States)

    Kusaka, Kyuhachi

    This article discusses Japanese Wikipedia's reliability and its social role as a free, collaborative, multilingual Internet encyclopedia supported by the non-profit Wikimedia Foundation. Japanese Wikipedia's reliability is explained from several surveys. The central concern is how the nature of encyclopedia and Wikipedia affects the quality of Wikipedia's articles. Wikipedia's core content policies such as verifiability, no original research and a neutral point of view will make articles better. But incomplete or poorly written first drafts exist because Wikipedia is a work in progress. The article also argues that social role of online encyclopedia which provides knowledge for all. Knowledge-based society or/and advanced information society require public understanding of science and other expertise. Online encyclopedia attributed to a reliable, published source using an inline citation will guide anyone to specialized knowledge.

  3. Bayesian system reliability assessment under fuzzy environments

    Energy Technology Data Exchange (ETDEWEB)

    Wu, H.-C

    2004-03-01

    The Bayesian system reliability assessment under fuzzy environments is proposed in this paper. In order to apply the Bayesian approach, the fuzzy parameters are assumed as fuzzy random variables with fuzzy prior distributions. The (conventional) Bayes estimation method will be used to create the fuzzy Bayes point estimator of system reliability by invoking the well-known theorem called 'Resolution Identity' in fuzzy sets theory. On the other hand, we also provide the computational procedures to evaluate the membership degree of any given Bayes point estimate of system reliability. In order to achieve this purpose, we transform the original problem into a nonlinear programming problem. This nonlinear programming problem is then divided into four subproblems for the purpose of simplifying computation. Finally, the subproblems can be solved by using any commercial optimizers, e.g. GAMS or LINGO.

  4. Reliability Analysis of Wind Turbines

    DEFF Research Database (Denmark)

    Toft, Henrik Stensgaard; Sørensen, John Dalsgaard

    2008-01-01

    In order to minimise the total expected life-cycle costs of a wind turbine it is important to estimate the reliability level for all components in the wind turbine. This paper deals with reliability analysis for the tower and blades of onshore wind turbines placed in a wind farm. The limit states......) the reliability level for a wind turbine placed in a wind farm is considered, and wake effects from neighbouring wind turbines is taken into account. An illustrative example with calculation of the reliability for mudline bending of the tower is considered. In the example the design is determined according...

  5. iOS and OS X Apps for Exploring Earthquake Activity

    Science.gov (United States)

    Ammon, C. J.

    2015-12-01

    The U.S. Geological Survey and many other agencies rapidly provide information following earthquakes. This timely information garners great public interest and provides a rich opportunity to engage students in discussion and analysis of earthquakes and tectonics. In this presentation I will describe a suite of iOS and Mac OS X apps that I use for teaching and that Penn State employs in outreach efforts in a small museum run by the College of Earth and Mineral Sciences. The iOS apps include a simple, global overview of earthquake activity, epicentral, designed for a quick review or event lookup. A more full-featured iPad app, epicentral-plus, includes a simple global overview along with views that allow a more detailed exploration of geographic regions of interest. In addition, epicentral-plus allows the user to monitor ground motions using seismic channel lists compatible with the IRIS web services. Some limited seismogram processing features are included to allow focus on appropriate signal bandwidths. A companion web site, which includes background material on earthquakes, and a blog that includes sample images and channel lists appropriate for monitoring earthquakes in regions of recent earthquake activity can be accessed through the a third panel in the app. I use epicentral-plus at the beginning of each earthquake seismology class to review recent earthquake activity and to stimulate students to formulate and to ask questions that lead to discussions of earthquake and tectonic processes. Less interactive OS X versions of the apps are used to display a global map of earthquake activity and seismograms in near real time in a small museum on the ground floor of the building hosting Penn State's Geoscience Department.

  6. Reliability engineering in RF CMOS

    NARCIS (Netherlands)

    Sasse, G.T.

    2008-01-01

    In this thesis new developments are presented for reliability engineering in RF CMOS. Given the increase in use of CMOS technology in applications for mobile communication, also the reliability of CMOS for such applications becomes increasingly important. When applied in these applications, CMOS is

  7. Estimation of Bridge Reliability Distributions

    DEFF Research Database (Denmark)

    Thoft-Christensen, Palle

    In this paper it is shown how the so-called reliability distributions can be estimated using crude Monte Carlo simulation. The main purpose is to demonstrate the methodology. Therefor very exact data concerning reliability and deterioration are not needed. However, it is intended in the paper...

  8. Reliability-Based Code Calibration

    DEFF Research Database (Denmark)

    Faber, M.H.; Sørensen, John Dalsgaard

    2003-01-01

    The present paper addresses fundamental concepts of reliability based code calibration. First basic principles of structural reliability theory are introduced and it is shown how the results of FORM based reliability analysis may be related to partial safety factors and characteristic values....... Thereafter the code calibration problem is presented in its principal decision theoretical form and it is discussed how acceptable levels of failure probability (or target reliabilities) may be established. Furthermore suggested values for acceptable annual failure probabilities are given for ultimate...... and serviceability limit states. Finally the paper describes the Joint Committee on Structural Safety (JCSS) recommended procedure - CodeCal - for the practical implementation of reliability based code calibration of LRFD based design codes....

  9. Photovoltaic performance and reliability workshop

    Energy Technology Data Exchange (ETDEWEB)

    Mrig, L. [ed.

    1993-12-01

    This workshop was the sixth in a series of workshops sponsored by NREL/DOE under the general subject of photovoltaic testing and reliability during the period 1986--1993. PV performance and PV reliability are at least as important as PV cost, if not more. In the US, PV manufacturers, DOE laboratories, electric utilities, and others are engaged in the photovoltaic reliability research and testing. This group of researchers and others interested in the field were brought together to exchange the technical knowledge and field experience as related to current information in this evolving field of PV reliability. The papers presented here reflect this effort since the last workshop held in September, 1992. The topics covered include: cell and module characterization, module and system testing, durability and reliability, system field experience, and standards and codes.

  10. Target Window Reliability

    Energy Technology Data Exchange (ETDEWEB)

    Woloshun, Keith Albert [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2016-02-11

    The target window design implemented and tested in experiments at ANL have performed without failure for the available beam of 6 mm FWHM on a 12 mm diameter target. However, scaling that design to a 25 mm diameter target size for a 12 mm FWHM beam has proven problematic. Combined thermal and mechanical (pressure induced) stresses and strains are too high to maintain the small coolant gaps and provide adequate fatigue lifetime.

  11. O que os adolescentes preferem: os alimentos da escola ou os alimentos competitivos?

    Directory of Open Access Journals (Sweden)

    Ana Carolina Barco Leme

    2013-06-01

    Full Text Available OBJETIVO: identificar e justificar as escolhas alimentares dos adolescentes durante o intervalo de aula e conhecer a visão dos funcionários acerca da aceitação dos alunos em relação à Alimentação Escolar. MATERIAIS E MÉTODOS: Trata-se de um estudo transversal realizado em uma escola pública do município de São Paulo. Foram selecionados 83 adolescentes para identificar as escolhas alimentares durante o intervalo de aula, amparando-se na Teoria das Representações Sociais. Com o intuito de complementar a pesquisa, 12 funcionários participaram de uma entrevista visando conhecer a visão deles em relação à aceitação e a adesão dos alunos à Alimentação Escolar. Para ambas as populações estudadas, foram elaboradas questões discursivas. A análise dos dados foi realizada pelo método do Discurso do Sujeito Coletivo, identificando as figuras metodológicas - expressões-chave e ideias centrais - para a construção do discurso. RESULTADOS: Os resultados demonstraram que, apesar da baixa aceitação da Alimentação Escolar, os alunos a consomem por ser a única alternativa para se alimentar no ambiente educacional. Também é comum a compra de alimentos em estabelecimentos próximos à escola ou trazidos de casa para complementar a Alimentação Escolar ou como a única fonte alimentar no período de aula. Na visão dos funcionários, os alunos gostam da Alimentação Escolar, com exceção de alguns alimentos que não fazem parte dos hábitos alimentares ou cujas características organolépticas não os atraem. CONCLUSÃO: Sugerem-se modificações nas refeições para que seu consumo seja estimulado.

  12. MEASUREMENT: ACCOUNTING FOR RELIABILITY IN PERFORMANCE ESTIMATES.

    Science.gov (United States)

    Waterman, Brian; Sutter, Robert; Burroughs, Thomas; Dunagan, W Claiborne

    2014-01-01

    When evaluating physician performance measures, physician leaders are faced with the quandary of determining whether departures from expected physician performance measurements represent a true signal or random error. This uncertainty impedes the physician leader's ability and confidence to take appropriate performance improvement actions based on physician performance measurements. Incorporating reliability adjustment into physician performance measurement is a valuable way of reducing the impact of random error in the measurements, such as those caused by small sample sizes. Consequently, the physician executive has more confidence that the results represent true performance and is positioned to make better physician performance improvement decisions. Applying reliability adjustment to physician-level performance data is relatively new. As others have noted previously, it's important to keep in mind that reliability adjustment adds significant complexity to the production, interpretation and utilization of results. Furthermore, the methods explored in this case study only scratch the surface of the range of available Bayesian methods that can be used for reliability adjustment; further study is needed to test and compare these methods in practice and to examine important extensions for handling specialty-specific concerns (e.g., average case volumes, which have been shown to be important in cardiac surgery outcomes). Moreover, it's important to note that the provider group average as a basis for shrinkage is one of several possible choices that could be employed in practice and deserves further exploration in future research. With these caveats, our results demonstrate that incorporating reliability adjustment into physician performance measurements is feasible and can notably reduce the incidence of "real" signals relative to what one would expect to see using more traditional approaches. A physician leader who is interested in catalyzing performance improvement

  13. A reliable dual Blumlein device

    Science.gov (United States)

    Noggle, R. C.; Adler, R. J.; Hendricks, K. J.

    1989-11-01

    In this article, we describe the 500 kV, 100 kA (each arm) GEMINI dual Blumlein accelerator at the Air Force Weapons Laboratory. Novel isolation, trigger, and trigger timing techniques are utilized in this device in order to allow two Blumleins to be charged by one Marx generator, and discharged at different times. The timing circuits are unique in that they make use of saturable magnetic circuits to provide the relative timing of the two outputs. We demonstrate that this technique is reliable, reproducible, and straightforward. We isolate the two Blumlein switches using an inductor wound so that it has minimal inductance when both Blumleins are charging, but maximum inductance when one is fired and the second Blumlein is delayed. Utilization of this technique allows us to isolate the two Blumleins without using resistive isolation with its associated energy loss, or simple inductive isolation with the associated cost in increasing the water line charge time. Complete operational and design data is presented, along with detailed data from the switch trigger arms.

  14. Conceptualizing Essay Tests' Reliability and Validity: From Research to Theory

    Science.gov (United States)

    Badjadi, Nour El Imane

    2013-01-01

    The current paper on writing assessment surveys the literature on the reliability and validity of essay tests. The paper aims to examine the two concepts in relationship with essay testing as well as to provide a snapshot of the current understandings of the reliability and validity of essay tests as drawn in recent research studies. Bearing in…

  15. Assessing the Impact of Imperfect Diagnosis on Service Reliability

    DEFF Research Database (Denmark)

    Grønbæk, Lars Jesper; Schwefel, Hans-Peter; Kjærgaard, Jens Kristian

    2010-01-01

    of diagnosis imperfections on reliability for time-constrained SCTP/TCP-based services. This enables: (a) a model-based sensitivity analysis of the service reliability to the diagnosis performance metrics, and (b) investigation of whether the chosen metrics provide a sufficiently detailed characterization...

  16. Fundamentals of reliability engineering applications in multistage interconnection networks

    CERN Document Server

    Gunawan, Indra

    2014-01-01

    This book presents fundamentals of reliability engineering with its applications in evaluating reliability of multistage interconnection networks. In the first part of the book, it introduces the concept of reliability engineering, elements of probability theory, probability distributions, availability and data analysis.  The second part of the book provides an overview of parallel/distributed computing, network design considerations, and more.  The book covers a comprehensive reliability engineering methods and its practical aspects in the interconnection network systems. Students, engineers, researchers, managers will find this book as a valuable reference source.

  17. Reliable software for unreliable hardware a cross layer perspective

    CERN Document Server

    Rehman, Semeen; Henkel, Jörg

    2016-01-01

    This book describes novel software concepts to increase reliability under user-defined constraints. The authors’ approach bridges, for the first time, the reliability gap between hardware and software. Readers will learn how to achieve increased soft error resilience on unreliable hardware, while exploiting the inherent error masking characteristics and error (stemming from soft errors, aging, and process variations) mitigations potential at different software layers. · Provides a comprehensive overview of reliability modeling and optimization techniques at different hardware and software levels; · Describes novel optimization techniques for software cross-layer reliability, targeting unreliable hardware.

  18. An interval-valued reliability model with bounded failure rates

    DEFF Research Database (Denmark)

    Kozine, Igor; Krymsky, Victor

    2012-01-01

    The approach to deriving interval-valued reliability measures described in this paper is distinctive from other imprecise reliability models in that it overcomes the issue of having to impose an upper bound on time to failure. It rests on the presupposition that a constant interval-valued failure...... rate is known possibly along with other reliability measures, precise or imprecise. The Lagrange method is used to solve the constrained optimization problem to derive new reliability measures of interest. The obtained results call for an exponential-wise approximation of failure probability density...... function if only partial failure information is available. An example is provided. © 2012 Copyright Taylor and Francis Group, LLC....

  19. Ultra Reliable Closed Loop Life Support for Long Space Missions

    Science.gov (United States)

    Jones, Harry W.; Ewert, Michael K.

    2010-01-01

    Spacecraft human life support systems can achieve ultra reliability by providing sufficient spares to replace all failed components. The additional mass of spares for ultra reliability is approximately equal to the original system mass, provided that the original system reliability is not too low. Acceptable reliability can be achieved for the Space Shuttle and Space Station by preventive maintenance and by replacing failed units. However, on-demand maintenance and repair requires a logistics supply chain in place to provide the needed spares. In contrast, a Mars or other long space mission must take along all the needed spares, since resupply is not possible. Long missions must achieve ultra reliability, a very low failure rate per hour, since they will take years rather than weeks and cannot be cut short if a failure occurs. Also, distant missions have a much higher mass launch cost per kilogram than near-Earth missions. Achieving ultra reliable spacecraft life support systems with acceptable mass will require a well-planned and extensive development effort. Analysis must determine the reliability requirement and allocate it to subsystems and components. Ultra reliability requires reducing the intrinsic failure causes, providing spares to replace failed components and having "graceful" failure modes. Technologies, components, and materials must be selected and designed for high reliability. Long duration testing is needed to confirm very low failure rates. Systems design should segregate the failure causes in the smallest, most easily replaceable parts. The system must be designed, developed, integrated, and tested with system reliability in mind. Maintenance and reparability of failed units must not add to the probability of failure. The overall system must be tested sufficiently to identify any design errors. A program to develop ultra reliable space life support systems with acceptable mass should start soon since it must be a long term effort.

  20. North American Electric Reliability Council (NERC) Reliability Coordinators

    Data.gov (United States)

    Department of Homeland Security — ERC is an international regulatory authority that works to improve the reliability of the bulk power system in North America. NERC works with many different regional...

  1. Reliability Assessment Of Wind Turbines

    DEFF Research Database (Denmark)

    Sørensen, John Dalsgaard

    2014-01-01

    Reduction of cost of energy for wind turbines are very important in order to make wind energy competitive compared to other energy sources. Therefore the turbine components should be designed to have sufficient reliability but also not be too costly (and safe). This paper presents models for unce......Reduction of cost of energy for wind turbines are very important in order to make wind energy competitive compared to other energy sources. Therefore the turbine components should be designed to have sufficient reliability but also not be too costly (and safe). This paper presents models...... for uncertainty modeling and reliability assessment of especially the structural components such as tower, blades, substructure and foundation. But since the function of a wind turbine is highly dependent on many electrical and mechanical components as well as a control system also reliability aspects...... of these components are discussed and it is described how there reliability influences the reliability of the structural components. Two illustrative examples are presented considering uncertainty modeling, reliability assessment and calibration of partial safety factors for structural wind turbine components exposed...

  2. New Approaches to Reliability Assessment

    DEFF Research Database (Denmark)

    Ma, Ke; Wang, Huai; Blaabjerg, Frede

    2016-01-01

    of energy. New approaches for reliability assessment are being taken in the design phase of power electronics systems based on the physics-of-failure in components. In this approach, many new methods, such as multidisciplinary simulation tools, strength testing of components, translation of mission profiles......, and statistical analysis, are involved to enable better prediction and design of reliability for products. This article gives an overview of the new design flow in the reliability engineering of power electronics from the system-level point of view and discusses some of the emerging needs for the technology...

  3. Reliability evaluation of power systems

    CERN Document Server

    Billinton, Roy

    1996-01-01

    The Second Edition of this well-received textbook presents over a decade of new research in power system reliability-while maintaining the general concept, structure, and style of the original volume. This edition features new chapters on the growing areas of Monte Carlo simulation and reliability economics. In addition, chapters cover the latest developments in techniques and their application to real problems. The text also explores the progress occurring in the structure, planning, and operation of real power systems due to changing ownership, regulation, and access. This work serves as a companion volume to Reliability Evaluation of Engineering Systems: Second Edition (1992).

  4. Therapy Provider Phase Information

    Data.gov (United States)

    U.S. Department of Health & Human Services — The Therapy Provider Phase Information dataset is a tool for providers to search by their National Provider Identifier (NPI) number to determine their phase for...

  5. Making noncatastrophic health care processes reliable: Learning to walk before running in creating high-reliability organizations.

    Science.gov (United States)

    Resar, Roger K

    2006-08-01

    Health care clinicians successfully apply proven medical evidence in common acute, chronic, or preventive care processes less than 80 percent of the time. This low level of reliability at the basic process level means that health care's efforts to improve reliability start from a different baseline from most other industries, and therefore may require a different approach. This paper describes The Institute for Healthcare Improvement's (IHI) current approach to improving health care reliability, including a useful nomenclature for levels of reliability, and a focus on improving reliability of basic health care processes before moving on to more sophisticated high reliability organization concepts. Early IHI work with a community of health care reliability innovators has identified four themes in health care settings that help to explain at least a portion of the gap in process reliability between health care and other industries. These include extreme dependence on hard work and personal vigilance, a focus on mediocre benchmark outcomes rather than process, great tolerance of provider autonomy, and failure to create systems that are specifically designed to reach articulated reliability goals. This paper describes our recommendations for the initial steps health care organizations' might take, based on these four themes, as they begin to move toward higher reliability.

  6. Nuclear reliability assurance data source guide

    Energy Technology Data Exchange (ETDEWEB)

    1976-11-01

    Seven sources of reliability and maintainability data are reviewed for their potential for providing nuclear equipment data. Consideration is given to similarity to nuclear application, variety of equipment types reported, availability of data, and obsolescence of data. In addition, discussions of advantages and disadvantages of each data source are presented, and samples of either the data or the character of the data are included as appendixes.

  7. Representative Sampling for reliable data analysis

    DEFF Research Database (Denmark)

    Petersen, Lars; Esbensen, Kim Harry

    2005-01-01

    regime in order to secure the necessary reliability of: samples (which must be representative, from the primary sampling onwards), analysis (which will not mean anything outside the miniscule analytical volume without representativity ruling all mass reductions involved, also in the laboratory) and data......) that fully cover all practical aspects of sampling and provides a handy “toolbox” for samplers, engineers, laboratory and scientific personnel....

  8. Overcoming some limitations of imprecise reliability models

    DEFF Research Database (Denmark)

    Kozine, Igor; Krymsky, Victor

    2011-01-01

    The application of imprecise reliability models is often hindered by the rapid growth in imprecision that occurs when many components constitute a system and by the fact that time to failure is bounded from above. The latter results in the necessity to explicitly introduce an upper bound on time ....... The main assumption consists in that failure rate is bounded. Langrage method is used to solve the non-linear program. Finally, an example is provided....

  9. Probability interpretations of intraclass reliabilities

    NARCIS (Netherlands)

    Ellis, J.L.

    2013-01-01

    Research where many organizations are rated by different samples of individuals such as clients, patients, or employees frequently uses reliabilities computed from intraclass correlations. Consumers of statistical information, such as patients and policy makers, may not have sufficient background

  10. Reliability Assessment of Wind Turbines

    DEFF Research Database (Denmark)

    Sørensen, John Dalsgaard

    2015-01-01

    but manufactured in series production based on many component tests, some prototype tests and zeroseries wind turbines. These characteristics influence the reliability assessment where focus in this paper is on the structural components. Levelized Cost Of Energy is very important for wind energy, especially when...... comparing to other energy sources. Therefore much focus is on cost reductions and improved reliability both for offshore and onshore wind turbines. The wind turbine components should be designed to have sufficient reliability level with respect to both extreme and fatigue loads but also not be too costly...... (and safe). In probabilistic design the single components are designed to a level of reliability, which accounts for an optimal balance between failure consequences, cost of operation & maintenance, material costs and the probability of failure. Furthermore, using a probabilistic design basis...

  11. Reliability assessment of Wind turbines

    DEFF Research Database (Denmark)

    Sørensen, John Dalsgaard

    2015-01-01

    but manufactured in series production based on many component tests, some prototype tests and zeroseries wind turbines. These characteristics influence the reliability assessment where focus in this paper is on the structural components. Levelized Cost Of Energy is very important for wind energy, especially when...... comparing to other energy sources. Therefore much focus is on cost reductions and improved reliability both for offshore and onshore wind turbines. The wind turbine components should be designed to have sufficient reliability level with respect to both extreme and fatigue loads but also not be too costly...... (and safe). In probabilistic design the single components are designed to a level of reliability, which accounts for an optimal balance between failure consequences, cost of operation & maintenance, material costs and the probability of failure. Furthermore, using a probabilistic design basis...

  12. Transportation reliability and trip satisfaction.

    Science.gov (United States)

    2012-10-01

    Travel delays and associated costs have become a major problem in Michigan over the : past several decades as congestion has continued to increase, creating significant negative : impacts on travel reliability on many roadways throughout the State. T...

  13. Development of reliable pavement models.

    Science.gov (United States)

    2011-05-01

    The current report proposes a framework for estimating the reliability of a given pavement structure as analyzed by : the Mechanistic-Empirical Pavement Design Guide (MEPDG). The methodology proposes using a previously fit : response surface, in plac...

  14. Innovations in power systems reliability

    CERN Document Server

    Santora, Albert H; Vaccaro, Alfredo

    2011-01-01

    Electrical grids are among the world's most reliable systems, yet they still face a host of issues, from aging infrastructure to questions of resource distribution. Here is a comprehensive and systematic approach to tackling these contemporary challenges.

  15. Reliability issues at the LHC

    CERN Multimedia

    CERN. Geneva. Audiovisual Unit; Gillies, James D

    2002-01-01

    The Lectures on reliability issues at the LHC will be focused on five main Modules on five days. Module 1: Basic Elements in Reliability Engineering Some basic terms, definitions and methods, from components up to the system and the plant, common cause failures and human factor issues. Module 2: Interrelations of Reliability & Safety (R&S) Reliability and risk informed approach, living models, risk monitoring. Module 3: The ideal R&S Process for Large Scale Systems From R&S goals via the implementation into the system to the proof of the compliance. Module 4: Some Applications of R&S on LHC Master logic, anatomy of risk, cause - consequence diagram, decomposition and aggregation of the system. Module 5: Lessons learned from R&S Application in various Technologies Success stories, pitfalls, constrains in data and methods, limitations per se, experienced in aviation, space, process, nuclear, offshore and transport systems and plants. The Lectures will reflect in summary the compromise in...

  16. Re–Os geochronology of the lacustrine Green River Formation: Insights into direct depositional dating of lacustrine successions, Re–Os systematics and paleocontinental weathering

    Science.gov (United States)

    Cumming, Vivien M.; Selby, David; Lillis, Paul G.

    2012-01-01

    Lacustrine sedimentary successions provide exceptionally high-resolution records of continental geological processes, responding to tectonic, climatic and magmatic influences. These successions are therefore essential for correlating geological and climatic phenomena across continents and furthermore the globe. Producing accurate geochronological frameworks within lacustrine strata is challenging because the stratigraphy is often bereft of biostratigraphy and directly dateable tuff horizons. The rhenium–osmium (Re–Os) geochronometer is a well-established tool for determining precise and accurate depositional ages of marine organic-rich rocks. Lake systems with stratified water columns are predisposed to the preservation of organic-rich rocks and thus should permit direct Re–Os geochronology of lacustrine strata. We present Re–Os systematics from one of the world's best documented lacustrine systems, the Eocene Green River Formation, providing accurate Re–Os depositional dates that are supported by Ar–Ar and U–Pb ages of intercalated tuff horizons. Precision of the Green River Formation Re–Os dates is controlled by the variation in initial 187Os/188Os and the range of 187Re/188Os ratios, as also documented in marine systems. Controls on uptake and fractionation of Re and Os are considered to relate mainly to depositional setting and the type of organic matter deposited, with the need to further understand the chelating precursors of Re and Os in organic matter highlighted. In addition to geochronology, the Re–Os data records the 187Os/188Os composition of lake water (1.41–1.54) at the time of deposition, giving an insight into continental runoff derived from weathering of the geological hinterland of the Green River Formation. Such insights enable us to evaluate fluctuations in continental climatic, tectonic and magmatic processes and provide the ability for chemostratigraphic correlation combined with direct depositional dates. Furthermore

  17. Improved reliability of power modules

    DEFF Research Database (Denmark)

    Baker, Nick; Liserre, Marco; Dupont, Laurent

    2014-01-01

    environments that challenge the reliability aspects of power electronic techniques. For example, increasingly thermally stressful environments are seen in applications such as electric vehicles, where ambient temperatures under the hood exceed 150 °C, while some wind turbine applications can place large...... temperature cycling conditions on the system. On the other hand, safety requirements in the aerospace and automotive industries place rigorous demands on reliability....

  18. Comprehensive Analysis of Rice Laccase Gene (OsLAC Family and Ectopic Expression of OsLAC10 Enhances Tolerance to Copper Stress in Arabidopsis

    Directory of Open Access Journals (Sweden)

    Qingquan Liu

    2017-01-01

    Full Text Available Laccases are encoded by a multigene family and widely distributed in plant genomes where they play roles oxidizing monolignols to produce higher-order lignin involved in plant development and stress responses. We identified 30 laccase genes (OsLACs from rice, which can be divided into five subfamilies, mostly expressed during early development of the endosperm, growing roots, and stems. OsLACs can be induced by hormones, salt, drought, and heavy metals stresses. The expression level of OsLAC10 increased 1200-fold after treatment with 20 μM Cu for 12 h. The laccase activities of OsLAC10 were confirmed in an Escherichia coli expression system. Lignin accumulation increased in the roots of Arabidopsis over-expressing OsLAC10 (OsLAC10-OX compared to wild-type controls. After growth on 1/2 Murashige and Skoog (MS medium containing toxic levels of Cu for seven days, roots of the OsLAC10-OX lines were significantly longer than those of the wild type. Compared to control plants, the Cu concentration decreased significantly in roots of the OsLAC10-OX line under hydroponic conditions. These results provided insights into the evolutionary expansion and functional divergence of OsLAC family. In addition, OsLAC10 is likely involved in lignin biosynthesis, and reduces the uptake of Cu into roots required for Arabidopsis to develop tolerance to Cu.

  19. Os odontoideum: case report Os odontoideum: reporte de caso Os odontoideum: relato de caso

    Directory of Open Access Journals (Sweden)

    André Rodrigues Pinho

    2012-12-01

    Full Text Available OBJECTIVE: To report the difficulties in managing a case of os odontoideum. METHODS: Female patient, 12 years old who developed a quadiparesis after minor cervical trauma in October 2005. In the emergency department a congenital cervical anomaly was identified. The patient was placed in a Stryker® frame and, few days later, in a halo bracing. After 3 months, an infection around the pins emerged and the halo vest had to be removed. A severe C1-2 instability persisted and a C1-C2 Gallie procedure was attempted. In the following weeks the bone disappeared and another procedure was attempted in June 2006 - C1 laminectomy and occiput-C3 fusion. In the following months the neurological status of the patient improved and a complete mass of occiput-C3 fusion was observed. RESULTS: We choose a posterior cervical arthrodesis of C1-C2 using the Gallie technique. Since the condition was not resolved we performed a second surgery, C1 laminectomy (determined by SAC of 8, 3 mm in MRI followed by posterior occiput-C3 fusion. In our case, until now, there is no evidence of axial decompensation, but a more prolonged follow-up is needed. CONCLUSIONS: The treatment of os odontoideum has many considerations but the essential that in the presence of instability and neurological deficit a solid fusion is achieved. In case of failure of posterior atlantoaxial wiring, the occiput-C2 or C3 fusion with rods seems to be an excellent option with a high rate of success, avoiding the need for additional support.OBJETIVO: Informe sobre las dificultades para tratar un caso de os odontoideum. MÉTODOS: Paciente, una adolescente, de 12 años de edad, que desarrolló una cuadriparesia después de un traumatismo cervical leve en octubre de 2005. En el Departamento de Primeros Auxilios, se identificó una anomalía cervical congénita. La paciente fue colocada en un marco de Stryker®, unos días después, en un braguero de halo. Cuando transcurrieron 3 meses, surgió una infecci

  20. SOBRE MALLARMÉ E OS PARATEXTOS

    Directory of Open Access Journals (Sweden)

    Zênia de Faria

    1997-01-01

    Full Text Available Normal 0 21 false false false PT-BR X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabela normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Este estudo se propõe a examinar a atitude de Mallarmé, em seus textos em prosa, com relação a alguns tipos de paratextos, particularmente os títulos e as epígra­fes.  

  1. Os doze trabalhos de Obama

    Directory of Open Access Journals (Sweden)

    Henrique Rattner

    2010-02-01

    Full Text Available

    A alegoria com o semideus da mitologia latina, filho de Júpiter e de Alcmena, dotado de poderes sobre humanos e chamado a executar doze tarefas impossíveis para um mortal comum não parece um exagero ao analisar os desafios políticos e econômicos enfrentados pelo atual presidente dos Estados Unidos, Barack Obama. Eleito por maioria expressiva de votos da população profundamente decepcionada pelo governo Bush e passados 300 dias desde sua posse, é possível fazer um primeiro balanço de seu governo. Obama herdou o país no meio da pior recessão das últimas décadas e deve enfrentar graves problemas na política interna e externa, sem falar da tremenda responsabilidade de recuperar o prestígio e o respeito pelo país que continua sendo a maior potência econômica e militar do mundo.

  2. Reliability of large superconducting magnets through design

    Energy Technology Data Exchange (ETDEWEB)

    Henning, C.D.

    1980-09-05

    As superconducting magnet systems grow larger and become the central component of major systems involving fusion, magnetohydrodynamics, and high-energy physics, their reliability must be commensurate with the enormous capital investment in the projects. Although the magnet may represent only 15% of the cost of a large system such as the Mirror Fusion Test Facility, its failure would be catastrophic to the entire investment. Effective quality control during construction is one method of ensuring success. However, if the design is unforgiving, even an inordinate amount of effort expended on quality control may be inadequate. Creative design is the most effective way of ensuring magnet reliability and providing a reasonable limit on the amount of quality control needed. For example, by subjecting the last drawing operation is superconductor manufacture to a stress larger than the magnet design stress, a 100% proof test is achieved; cabled conductors offer mechanical redundancy, as do some methods of conductor joining; ground-plane insulation should be multilayered to prevent arcs, and interturn and interlayer insulation spaced to be compatible with the self-extinguishing of arcs during quench voltages; electrical leads should be thermally protected; and guard vacuum spaces can be incorporated to control helium leaks. Many reliable design options are known to magnet designers. These options need to be documented and organized to produce a design guide. Eventually, standard procedures, safety factors, and design codes can lead to reliability in magnets comparable to that obtained in pressure vessels and other structures. Wihout such reliability, large-scale applications in major systems employing magnetic fusion energy, magnetohydrodynamics, or high-energy physics would present unacceptable economic risks.

  3. Wireless Channel Modeling Perspectives for Ultra-Reliable Communications

    DEFF Research Database (Denmark)

    Eggers, Patrick Claus F.; Popovski, Petar

    2018-01-01

    Ultra-Reliable Communication (URC) is one of the distinctive features of the upcoming 5G wireless communication. The level of reliability, going down to packet error rates (PER) of $10^{-9}$, should be sufficiently convincing in order to remove cables in an industrial setting or provide remote......-wave model leads to pessimistic predictions of the fading in the region of ultra-reliable communications, while the CDFs of models that contain diffuse components have slopes that correspond to the slope of a Rayleigh fading. We provide analysis of the receive antenna diversity schemes for URC...

  4. Survey of Software Assurance Techniques for Highly Reliable Systems

    Science.gov (United States)

    Nelson, Stacy

    2004-01-01

    This document provides a survey of software assurance techniques for highly reliable systems including a discussion of relevant safety standards for various industries in the United States and Europe, as well as examples of methods used during software development projects. It contains one section for each industry surveyed: Aerospace, Defense, Nuclear Power, Medical Devices and Transportation. Each section provides an overview of applicable standards and examples of a mission or software development project, software assurance techniques used and reliability achieved.

  5. Os Fungos no Funcionamento dos Ecossistemas Florestais

    OpenAIRE

    Santos-Silva, Celeste; Machado, Helena

    2011-01-01

    Os fungos no funcionamento dos ecossistemas Florestais: Papel dos fungos sapróbios na degradação da matériaorgânica Papel dos fungos micorrízicos na nutrição e saúde das árvores Diversidade fúngica e estabilidade das florestas Relações entre os fungos e os animais Doenças radiculares associadas ao declínio do montado de sobro e azinho

  6. Macintosh Troubleshooting Pocket Guide for Mac OS

    CERN Document Server

    Lerner, David; Corporation, Tekserve

    2009-01-01

    The Macintosh Troubleshooting Pocket Guide covers the most common user hardware and software trouble. It's not just a book for Mac OS X (although it includes tips for OS X and Jaguar), it's for anyone who owns a Mac of any type-- there are software tips going back as far as OS 6. This slim guide distills the answers to the urgent questions that Tekserve's employee's answer every week into a handy guide that fits in your back pocket or alongside your keyboard.

  7. Opportunities for measuring wheelchair kinematics in match settings; reliability of a three inertial sensor configuration

    NARCIS (Netherlands)

    van der Slikke, R.M.A.; Berger, M.A.; Bregman, D.J.J.; Lagerberg, A.H.; Veeger, H.E.J.

    2015-01-01

    Knowledge of wheelchair kinematics during a match is prerequisite for performance improvement in wheelchair basketball. Unfortunately, no measurement system providing key kinematic outcomes proved to be reliable in competition. In this study, the reliability of estimated wheelchair kinematics based

  8. Teach yourself visually complete OS X Mavericks

    CERN Document Server

    McFedries, Paul

    2013-01-01

    A deep dive into OS X Mavericks If you want to quickly cover the basics of Apple's new operating system, OS X Mavericks, and then delve deeper into the topic, this is the book for you. Using clear, step-by-step screenshots, Teach Yourself VISUALLY Complete OS X Mavericks shows you how to tackle not only beginning but also intermediate and more advanced functions. Two-page, side-by-side lessons break big topics into smaller bits, and you'll find helpful sidebars with plenty of practical tips and tricks. If you're a visual learner looking for enhanced coverage of OS X Mavericks, this new guide

  9. Teach yourself visually OS X Mavericks

    CERN Document Server

    McFedries, Paul

    2013-01-01

    Clear, step-by-step instruction guides you through OS X Mavericks If you want to get quickly up to speed on the newest (and now cat-free) OS X operating system, OS X Mavericks, this easy-to-follow book is just the ticket. Designed for visual learners, Teach Yourself VISUALLY OS X Mavericks uses rich, full-color screenshots and illustrations to show rather than tell you how to use Mavericks. You'll learn how to customize your Mac, enjoy digital media, connect common peripherals, and get the most out of the very latest enhancements, including iBooks, Maps, iCloud, and Calendar. Shows you how t

  10. Mac OS X for Unix Geeks (Leopard)

    CERN Document Server

    Rothman, Ernest E; Rosen, Rich

    2009-01-01

    If you've been lured to Mac OS X because of its Unix roots, this invaluable book serves as a bridge between Apple's Darwin OS and the more traditional Unix systems. The new edition offers a complete tour of Mac OS X's Unix shell for Leopard and Tiger, and helps you find the facilities that replace or correspond to standard Unix utilities. Learn how to compile code, link to libraries, and port Unix software to Mac OS X and much more with this concise guide.

  11. Quantifying reliability uncertainty : a proof of concept.

    Energy Technology Data Exchange (ETDEWEB)

    Diegert, Kathleen V.; Dvorack, Michael A.; Ringland, James T.; Mundt, Michael Joseph; Huzurbazar, Aparna (Los Alamos National Laboratory, Los Alamos, NM); Lorio, John F.; Fatherley, Quinn (Los Alamos National Laboratory, Los Alamos, NM); Anderson-Cook, Christine (Los Alamos National Laboratory, Los Alamos, NM); Wilson, Alyson G. (Los Alamos National Laboratory, Los Alamos, NM); Zurn, Rena M.

    2009-10-01

    This paper develops Classical and Bayesian methods for quantifying the uncertainty in reliability for a system of mixed series and parallel components for which both go/no-go and variables data are available. Classical methods focus on uncertainty due to sampling error. Bayesian methods can explore both sampling error and other knowledge-based uncertainties. To date, the reliability community has focused on qualitative statements about uncertainty because there was no consensus on how to quantify them. This paper provides a proof of concept that workable, meaningful quantification methods can be constructed. In addition, the application of the methods demonstrated that the results from the two fundamentally different approaches can be quite comparable. In both approaches, results are sensitive to the details of how one handles components for which no failures have been seen in relatively few tests.

  12. Reliability Estimation for Double Containment Piping

    Energy Technology Data Exchange (ETDEWEB)

    L. Cadwallader; T. Pinna

    2012-08-01

    Double walled or double containment piping is considered for use in the ITER international project and other next-generation fusion device designs to provide an extra barrier for tritium gas and other radioactive materials. The extra barrier improves confinement of these materials and enhances safety of the facility. This paper describes some of the design challenges in designing double containment piping systems. There is also a brief review of a few operating experiences of double walled piping used with hazardous chemicals in different industries. This paper recommends approaches for the reliability analyst to use to quantify leakage from a double containment piping system in conceptual and more advanced designs. The paper also cites quantitative data that can be used to support such reliability analyses.

  13. Risk and reliability assessment for telecommunications networks

    Energy Technology Data Exchange (ETDEWEB)

    Wyss, G.D.; Schriner, H.K.; Gaylor, T.R.

    1996-08-01

    Sandia National Laboratories has assembled an interdisciplinary team to explore the applicability of probabilistic logic modeling (PLM) techniques to model network reliability for a wide variety of communications network architectures. The authors have found that the reliability and failure modes of current generation network technologies can be effectively modeled using fault tree PLM techniques. They have developed a ``plug-and-play`` fault tree analysis methodology that can be used to model connectivity and the provision of network services in a wide variety of current generation network architectures. They have also developed an efficient search algorithm that can be used to determine the minimal cut sets of an arbitrarily-interconnected (non-hierarchical) network without the construction of a fault tree model. This paper provides an overview of these modeling techniques and describes how they are applied to networks that exhibit hybrid network structures (i.e., a network in which some areas are hierarchical and some areas are not hierarchical).

  14. ERP Reliability Analysis (ERA) Toolbox: An open-source toolbox for analyzing the reliability of event-related brain potentials.

    Science.gov (United States)

    Clayson, Peter E; Miller, Gregory A

    2017-01-01

    Generalizability theory (G theory) provides a flexible, multifaceted approach to estimating score reliability. G theory's approach to estimating score reliability has important advantages over classical test theory that are relevant for research using event-related brain potentials (ERPs). For example, G theory does not require parallel forms (i.e., equal means, variances, and covariances), can handle unbalanced designs, and provides a single reliability estimate for designs with multiple sources of error. This monograph provides a detailed description of the conceptual framework of G theory using examples relevant to ERP researchers, presents the algorithms needed to estimate ERP score reliability, and provides a detailed walkthrough of newly-developed software, the ERP Reliability Analysis (ERA) Toolbox, that calculates score reliability using G theory. The ERA Toolbox is open-source, Matlab software that uses G theory to estimate the contribution of the number of trials retained for averaging, group, and/or event types on ERP score reliability. The toolbox facilitates the rigorous evaluation of psychometric properties of ERP scores recommended elsewhere in this special issue. Copyright © 2016 Elsevier B.V. All rights reserved.

  15. Distribution Equipment Reliability Data; Tillfoerlitlighetsdata paa komponent nivaa foer eldistributionsnaet

    Energy Technology Data Exchange (ETDEWEB)

    Ying He (Vattenfall Research and Development AB, Stockholm (SE))

    2007-09-15

    In risk analysis of a power system, the risk for the system to fail power supply is calculated from the knowledge of the reliability data of individual system components. Meaningful risk analysis requires reasonable and acceptable data. The quality of the data has the fundamental importance for the analysis. However, the valid data are expensive to collect. The component reliability performance statistics are not easy to obtain. This report documents the distribution equipment reliability data developed by the project 'Component Reliability Data for Risk Analysis of Distribution Systems' within the Elforsk RandD program 'Risk Analysis 06-10'. The project analyzed a large sample size of distribution outages recorded by more than a hundred power utilities in Sweden during 2004-2005, and derived the equipment reliability data nationwide. The detailed summaries of these data are presented in the appendices of the report. The component reliability was also investigated at a number of power utilities including Vattenfall Eldistribution AB, Goeteborg Energi Naet AB, E.ON Elnaet Sverige AB, Fortum Distribution, and Linde Energi AB. The reliability data were derived for individual utilities. The detailed data lists and failure statistics are summarized in the appendices for each participating companies. The data provided in this report are developed based on a large sample size of field outage records and can be therefore used as generic data in system risk analysis and reliability studies. In order to provide more references and complementary data, the equipment reliability surveys conducted by IEEE were studied in the project. The most significant results obtained by the IEEE surveys are provided in the report. A summary of the reliability data surveyed by IEEE is presented in the appendix of the report. These data are suggested to use in the absence of better data being available. The reliability data estimates were derived for sustained failure rates

  16. Fundamental mechanisms of micromachine reliability

    Energy Technology Data Exchange (ETDEWEB)

    DE BOER,MAARTEN P.; SNIEGOWSKI,JEFFRY J.; KNAPP,JAMES A.; REDMOND,JAMES M.; MICHALSKE,TERRY A.; MAYER,THOMAS K.

    2000-01-01

    independent of RH up to a threshold value, depending on the coating chemistry. The mechanism for the adhesion increase beyond this threshold value is that the coupling agent reconfigures from a surface to a bulk phase (Chapter 3). To investigate the details of how the adhesion increase occurs, the authors developed the mechanics for adhesion hysteresis measurements. These revealed that near-crack tip compression is the underlying cause of the adhesion increase (Chapter 4). A vacuum deposition chamber for silane coupling agent deposition was constructed. Results indicate that vapor deposited coatings are less susceptible to degradation at high RH (Chapter 5). To address issues relating to surfaces in relative motion, a new test structure to measure friction was developed. In contrast to other surface micromachined friction test structures, uniform apparent pressure is applied in the frictional contact zone (Chapter 6). The test structure will enable friction studies over a large pressure and dynamic range. In this LDRD project, the authors established an infrastructure for MEMS adhesion and friction metrology. They then characterized in detail the performance of hydrophilic and hydrophobic films under humid conditions, and determined mechanisms which limit this performance. These studies contribute to a fundamental understanding for MEMS reliability design rules. They also provide valuable data for MEMS packaging requirements.

  17. Component reliability for electronic systems

    CERN Document Server

    Bajenescu, Titu-Marius I

    2010-01-01

    The main reason for the premature breakdown of today's electronic products (computers, cars, tools, appliances, etc.) is the failure of the components used to build these products. Today professionals are looking for effective ways to minimize the degradation of electronic components to help ensure longer-lasting, more technically sound products and systems. This practical book offers engineers specific guidance on how to design more reliable components and build more reliable electronic systems. Professionals learn how to optimize a virtual component prototype, accurately monitor product reliability during the entire production process, and add the burn-in and selection procedures that are the most appropriate for the intended applications. Moreover, the book helps system designers ensure that all components are correctly applied, margins are adequate, wear-out failure modes are prevented during the expected duration of life, and system interfaces cannot lead to failure.

  18. Reliability Characteristics of Power Plants

    Directory of Open Access Journals (Sweden)

    Zbynek Martinek

    2017-01-01

    Full Text Available This paper describes the phenomenon of reliability of power plants. It gives an explanation of the terms connected with this topic as their proper understanding is important for understanding the relations and equations which model the possible real situations. The reliability phenomenon is analysed using both the exponential distribution and the Weibull distribution. The results of our analysis are specific equations giving information about the characteristics of the power plants, the mean time of operations and the probability of failure-free operation. Equations solved for the Weibull distribution respect the failures as well as the actual operating hours. Thanks to our results, we are able to create a model of dynamic reliability for prediction of future states. It can be useful for improving the current situation of the unit as well as for creating the optimal plan of maintenance and thus have an impact on the overall economics of the operation of these power plants.

  19. Reliability Modeling of Wind Turbines

    DEFF Research Database (Denmark)

    Kostandyan, Erik

    Cost reductions for offshore wind turbines are a substantial requirement in order to make offshore wind energy more competitive compared to other energy supply methods. During the 20 – 25 years of wind turbines useful life, Operation & Maintenance costs are typically estimated to be a quarter...... to one third of the total cost of energy. Reduction of Operation & Maintenance costs will result in significant cost savings and result in cheaper electricity production. Operation & Maintenance processes mainly involve actions related to replacements or repair. Identifying the right times when...... for Operation & Maintenance planning. Concentrating efforts on development of such models, this research is focused on reliability modeling of Wind Turbine critical subsystems (especially the power converter system). For reliability assessment of these components, structural reliability methods are applied...

  20. Structural Optimization with Reliability Constraints

    DEFF Research Database (Denmark)

    Sørensen, John Dalsgaard; Thoft-Christensen, Palle

    1986-01-01

    During the last 25 years considerable progress has been made in the fields of structural optimization and structural reliability theory. In classical deterministic structural optimization all variables are assumed to be deterministic. Due to the unpredictability of loads and strengths of actual...... structures it is now widely accepted that structural problems are non-deterministic. Therefore, some of the variables have to be modelled as random variables/processes and a reliability-based design philosophy should be used, Comell [1], Moses [2], Ditlevsen [3] and Thoft-Christensen & Baker [ 4......]. In this paper we consider only structures which can be modelled as systems of elasto-plastic elements, e.g. frame and truss structures. In section 2 a method to evaluate the reliability of such structural systems is presented. Based on a probabilistic point of view a modern structural optimization problem...

  1. Reliability Based Ship Structural Design

    DEFF Research Database (Denmark)

    Dogliani, M.; Østergaard, C.; Parmentier, G.

    1996-01-01

    This paper deals with the development of different methods that allow the reliability-based design of ship structures to be transferred from the area of research to the systematic application in current design. It summarises the achievements of a three-year collaborative research project dealing...... with developments of models of load effects and of structural collapse adopted in reliability formulations which aim at calibrating partial safety factors for ship structural design. New probabilistic models of still-water load effects are developed both for tankers and for containerships. New results are presented...... of non-linear wave induced load effects and the corresponding long-term formulations. Methods to combine linear and non-linear components of wave induced load effects have been developed and checked by alternative methods.These improved models were used for the reliability assessment of the primary hull...

  2. Reliability of Wave Energy Converters

    DEFF Research Database (Denmark)

    Ambühl, Simon

    There are many different working principles for wave energy converters (WECs) which are used to produce electricity from waves. In order for WECs to become successful and more competitive to other renewable electricity sources, the consideration of the structural reliability of WECs is essential...... WEPTOS. Calibration of safety factors are performed for welded structures at theWavestar device including different control systems for harvesting energy from waves. In addition, a case study of different O&M strategies for WECs is discussed, and an example of reliability-based structural optimization....... Structural reliability considerations and optimizations impact operation and maintenance (O&M) costs as well as the initial investment costs. Furthermore, there is a control system for WEC applications which defines the harvested energy but also the loads onto the structure. Therefore, extreme loads but also...

  3. Reliability and continuous regeneration model

    Directory of Open Access Journals (Sweden)

    Anna Pavlisková

    2006-06-01

    Full Text Available The failure-free function of an object is very important for the service. This leads to the interest in the determination of the object reliability and failure intensity. The reliability of an element is defined by the theory of probability.The element durability T is a continuous random variate with the probability density f. The failure intensity (tλ is a very important reliability characteristics of the element. Often it is an increasing function, which corresponds to the element ageing. We disposed of the data about a belt conveyor failures recorded during the period of 90 months. The given ses behaves according to the normal distribution. By using a mathematical analysis and matematical statistics, we found the failure intensity function (tλ. The function (tλ increases almost linearly.

  4. Spacecraft reliability/maintainability optimization.

    Science.gov (United States)

    Sharmahd, J. N.

    1972-01-01

    Description of a procedure to develop a methodology to optimize man-serviced systems for reliability and maintainability. The spacecraft systems are analyzed using failure modes and effects analysis and maintenance analysis, component mean-time-between failure, duty cycle, type of redundancy, and cost information to develop parametric data on various time intervals. Included are crew time-to-repair, cost, weight, and volume effects of increasing subsystem reliability above the baseline. Results are presented for space systems using the existing data from a research and applications module. These results show the minimum cost of sustaining mission operations.

  5. Reliability Assessment of Concrete Bridges

    DEFF Research Database (Denmark)

    Thoft-Christensen, Palle; Middleton, C. R.

    This paper is partly based on research performed for the Highways Agency, London, UK under the project DPU/9/44 "Revision of Bridge Assessment Rules Based on Whole Life Performance: concrete bridges". It contains the details of a methodology which can be used to generate Whole Life (WL) reliability...... profiles. These WL reliability profiles may be used to establish revised rules for concrete bridges. This paper is to some extend based on Thoft-Christensen et. al. [1996], Thoft-Christensen [1996] et. al. and Thoft-Christensen [1996]....

  6. Preferred provider organizations.

    Science.gov (United States)

    Davy, J D

    1984-05-01

    The 1980s has marked the beginning of a new alternative health care delivery system: the preferred provider organization ( PPO ). This system has developed from the health maintenance organization model and is predominant in California and Colorado. A PPO is a group of providers, usually hospitals and doctors, who agree to provide health care to subscribers for a negotiated fee that is usually discounted. Preferred provider organizations are subject to peer review and strict use controls in exchange for a consistent volume of patients and speedy turnaround on claims payments. This article describes the factors leading to the development of PPOs and the implications for occupational therapy.

  7. Clouds: a New Playground for the XtreemOS Grid Operating System

    OpenAIRE

    Morin, Christine; Jégou, Yvon; Gallard, Jérôme; Riteau, Pierre

    2009-01-01

    The emerging cloud computing model has recently gained a lot of interest both from commercial companies and from the research community. XtreemOS is a distributed operating system for large-scale wide-area dynamic infrastructures spanning multiple administrative domains. XtreemOS, which is based on the Linux operating system, has been designed as a Grid operating system providing native support for virtual organizations. In this paper, we discuss the positioning of XtreemOS technologies with ...

  8. Joint Architecture Standard (JAS) Reliable Data Delivery Protocol (RDDP) specification.

    Energy Technology Data Exchange (ETDEWEB)

    Enderle, Justin Wayne; Daniels, James W.; Gardner, Michael T.; Eldridge, John M.; Hunt, Richard D.; Gallegos, Daniel E.

    2011-05-01

    The Joint Architecture Standard (JAS) program at Sandia National Laboratories requires the use of a reliable data delivery protocol over SpaceWire. The National Aeronautics and Space Administration at the Goddard Spaceflight Center in Greenbelt, Maryland, developed and specified a reliable protocol for its Geostationary Operational Environment Satellite known as GOES-R Reliable Data Delivery Protocol (GRDDP). The JAS program implemented and tested GRDDP and then suggested a number of modifications to the original specification to meet its program specific requirements. This document details the full RDDP specification as modified for JAS. The JAS Reliable Data Delivery Protocol uses the lower-level SpaceWire data link layer to provide reliable packet delivery services to one or more higher-level host application processes. This document specifies the functional requirements for JRDDP but does not specify the interfaces to the lower- or higher-level processes, which may be implementation-dependent.

  9. Understanding Information Hiding in iOS

    OpenAIRE

    Caviglione, Luca; Mazurczyk, Wojciech

    2014-01-01

    The Apple operating system (iOS) has so far proved resistant to information-hiding techniques, which help attackers covertly communicate. However, Siri - a native iOS service that controls iPhones and iPads via voice commands - could change this trend.

  10. Building Service Provider Capabilities

    DEFF Research Database (Denmark)

    Brandl, Kristin; Jaura, Manya; Ørberg Jensen, Peter D.

    In this paper we study whether and how the interaction between clients and the service providers contributes to the development of capabilities in service provider firms. In situations where such a contribution occurs, we analyze how different types of activities in the production process...

  11. Providing free autopoweroff plugs

    DEFF Research Database (Denmark)

    Jensen, Carsten Lynge; Hansen, Lars Gårn; Fjordbak, Troels

    2012-01-01

    Experimental evidence of the effect of providing households with cheap energy saving technology is sparse. We present results from a field experiment in which autopoweroff plugs were provided free of charge to randomly selected households. We use propensity score matching to find treatment effects...

  12. iOS app development for dummies

    CERN Document Server

    Feiler, Jesse

    2014-01-01

    If you've got incredible iOS ideas, get this book and bring them to life! iOS 7 represents the most significant update to Apple's mobile operating system since the first iPhone was released, and even the most seasoned app developers are looking for information on how to take advantage of the latest iOS 7 features in their app designs. That's where iOS App Development For Dummies comes in! Whether you're a programming hobbyist wanting to build an app for fun or a professional developer looking to expand into the iOS market, this book will walk you through the fundamentals of building a univer

  13. Mass and Reliability System (MaRS)

    Science.gov (United States)

    Barnes, Sarah

    2016-01-01

    The Safety and Mission Assurance (S&MA) Directorate is responsible for mitigating risk, providing system safety, and lowering risk for space programs from ground to space. The S&MA is divided into 4 divisions: The Space Exploration Division (NC), the International Space Station Division (NE), the Safety & Test Operations Division (NS), and the Quality and Flight Equipment Division (NT). The interns, myself and Arun Aruljothi, will be working with the Risk & Reliability Analysis Branch under the NC Division's. The mission of this division is to identify, characterize, diminish, and communicate risk by implementing an efficient and effective assurance model. The team utilizes Reliability and Maintainability (R&M) and Probabilistic Risk Assessment (PRA) to ensure decisions concerning risks are informed, vehicles are safe and reliable, and program/project requirements are realistic and realized. This project pertains to the Orion mission, so it is geared toward a long duration Human Space Flight Program(s). For space missions, payload is a critical concept; balancing what hardware can be replaced by components verse by Orbital Replacement Units (ORU) or subassemblies is key. For this effort a database was created that combines mass and reliability data, called Mass and Reliability System or MaRS. The U.S. International Space Station (ISS) components are used as reference parts in the MaRS database. Using ISS components as a platform is beneficial because of the historical context and the environment similarities to a space flight mission. MaRS uses a combination of systems: International Space Station PART for failure data, Vehicle Master Database (VMDB) for ORU & components, Maintenance & Analysis Data Set (MADS) for operation hours and other pertinent data, & Hardware History Retrieval System (HHRS) for unit weights. MaRS is populated using a Visual Basic Application. Once populated, the excel spreadsheet is comprised of information on ISS components including

  14. Photovoltaic performance and reliability workshop

    Energy Technology Data Exchange (ETDEWEB)

    Kroposki, B

    1996-10-01

    This proceedings is the compilation of papers presented at the ninth PV Performance and Reliability Workshop held at the Sheraton Denver West Hotel on September 4--6, 1996. This years workshop included presentations from 25 speakers and had over 100 attendees. All of the presentations that were given are included in this proceedings. Topics of the papers included: defining service lifetime and developing models for PV module lifetime; examining and determining failure and degradation mechanisms in PV modules; combining IEEE/IEC/UL testing procedures; AC module performance and reliability testing; inverter reliability/qualification testing; standardization of utility interconnect requirements for PV systems; need activities to separate variables by testing individual components of PV systems (e.g. cells, modules, batteries, inverters,charge controllers) for individual reliability and then test them in actual system configurations; more results reported from field experience on modules, inverters, batteries, and charge controllers from field deployed PV systems; and system certification and standardized testing for stand-alone and grid-tied systems.

  15. Fatigue Reliability under Random Loads

    DEFF Research Database (Denmark)

    Talreja, R.

    1979-01-01

    We consider the problem of estimating the probability of survival (non-failure) and the probability of safe operation (strength greater than a limiting value) of structures subjected to random loads. These probabilities are formulated in terms of the probability distributions of the loads and the...... propagation stage. The consequences of this behaviour on the fatigue reliability are discussed....

  16. The Reliability of College Grades

    Science.gov (United States)

    Beatty, Adam S.; Walmsley, Philip T.; Sackett, Paul R.; Kuncel, Nathan R.; Koch, Amanda J.

    2015-01-01

    Little is known about the reliability of college grades relative to how prominently they are used in educational research, and the results to date tend to be based on small sample studies or are decades old. This study uses two large databases (N > 800,000) from over 200 educational institutions spanning 13 years and finds that both first-year…

  17. Reliability Analysis of Money Habitudes

    Science.gov (United States)

    Delgadillo, Lucy M.; Bushman, Brittani S.

    2015-01-01

    Use of the Money Habitudes exercise has gained popularity among various financial professionals. This article reports on the reliability of this resource. A survey administered to young adults at a western state university was conducted, and each Habitude or "domain" was analyzed using Cronbach's alpha procedures. Results showed all six…

  18. RELIABILITY EVALUATION OF PRIMARY CELLS

    African Journals Online (AJOL)

    Dr Obe

    ABSTRACT. Evaluation of the reliability of a primary cell took place in three stages: 192 cells went through a slow-discharged test. A designed experiment was conducted on 144 cells; there were three factors in the experiment: Storage temperature (three levels), thermal shock (two levels) and date code (two levels). 16 cells ...

  19. Reliability analysis of dynamic structures

    NARCIS (Netherlands)

    Daghigh, M.; Hengst, S.; Vrouwenvelder, A.C.W.M.; Boonstra, H.

    2003-01-01

    In this paper, the concepts to compute reliabilities for stationary and ergodic conditions in the presence of time-invariant, non-ergodic parameters will first be reviewed. Focus wilt be on numerical techniques like FORM and numerical integration. The effect of correlation between the environmental

  20. Wind turbine reliability database update.

    Energy Technology Data Exchange (ETDEWEB)

    Peters, Valerie A.; Hill, Roger Ray; Stinebaugh, Jennifer A.; Veers, Paul S.

    2009-03-01

    This report documents the status of the Sandia National Laboratories' Wind Plant Reliability Database. Included in this report are updates on the form and contents of the Database, which stems from a fivestep process of data partnerships, data definition and transfer, data formatting and normalization, analysis, and reporting. Selected observations are also reported.

  1. Measuring Service Reliability Using Automatic Vehicle Location Data

    Directory of Open Access Journals (Sweden)

    Zhenliang Ma

    2014-01-01

    Full Text Available Bus service reliability has become a major concern for both operators and passengers. Buffer time measures are believed to be appropriate to approximate passengers' experienced reliability in the context of departure planning. Two issues with regard to buffer time estimation are addressed, namely, performance disaggregation and capturing passengers’ perspectives on reliability. A Gaussian mixture models based method is applied to disaggregate the performance data. Based on the mixture models distribution, a reliability buffer time (RBT measure is proposed from passengers’ perspective. A set of expected reliability buffer time measures is developed for operators by using different spatial-temporal levels combinations of RBTs. The average and the latest trip duration measures are proposed for passengers that can be used to choose a service mode and determine the departure time. Using empirical data from the automatic vehicle location system in Brisbane, Australia, the existence of mixture service states is verified and the advantage of mixture distribution model in fitting travel time profile is demonstrated. Numerical experiments validate that the proposed reliability measure is capable of quantifying service reliability consistently, while the conventional ones may provide inconsistent results. Potential applications for operators and passengers are also illustrated, including reliability improvement and trip planning.

  2. A Reliability-Oriented Design Method for Power Electronic Converters

    DEFF Research Database (Denmark)

    Wang, Huai; Zhou, Dao; Blaabjerg, Frede

    2013-01-01

    Reliability is a crucial performance indicator of power electronic systems in terms of availability, mission accomplishment and life cycle cost. A paradigm shift in the research on reliability of power electronics is going on from simple handbook based calculations (e.g. models in MIL-HDBK-217F h...... and reliability prediction models are provided. A case study on a 2.3 MW wind power converter is discussed with emphasis on the reliability critical component IGBT modules.......Reliability is a crucial performance indicator of power electronic systems in terms of availability, mission accomplishment and life cycle cost. A paradigm shift in the research on reliability of power electronics is going on from simple handbook based calculations (e.g. models in MIL-HDBK-217F...... handbook) to the physics-of-failure approach and design for reliability process. A systematic design procedure consisting of various design tools is presented in this paper to design reliability into the power electronic converters since the early concept phase. The corresponding design procedures...

  3. Reliability of the school AMPS measures.

    Science.gov (United States)

    Munkholm, Michaela; Löfgren, Britta; Fisher, Anne G

    2012-01-01

    The purpose of this study was to use a variety of methods to evaluate and cross-validate the reliability estimates of the quality of schoolwork performance measures in the School Version of the Assessment of Motor and Process Skills (School AMPS) (1). Split-half reliability was estimated based on School AMPS data from 6 194 students who had performed at least two school AMPS tasks. Two different split-half methods were used: splitting the School AMPS items vertically and splitting them horizontally. The Rasch equivalent of Cronbach's alpha for the full School AMPS evaluation and standard error of measurement (SEm) were also considered. All three methods yielded high reliability coefficient estimates (r ≥ 0.70) and overall SEm was low. From a practice perspective, the results of this study are of clinical importance as they provide evidence that occupational therapists can have confidence in the consistency of the School AMPS measures when they are used in the process of making decisions about individual students, planning interventions, and later performing follow-up evaluations to measure the outcome.

  4. On reliable discovery of molecular signatures

    Directory of Open Access Journals (Sweden)

    Björkegren Johan

    2009-01-01

    Full Text Available Abstract Background Molecular signatures are sets of genes, proteins, genetic variants or other variables that can be used as markers for a particular phenotype. Reliable signature discovery methods could yield valuable insight into cell biology and mechanisms of human disease. However, it is currently not clear how to control error rates such as the false discovery rate (FDR in signature discovery. Moreover, signatures for cancer gene expression have been shown to be unstable, that is, difficult to replicate in independent studies, casting doubts on their reliability. Results We demonstrate that with modern prediction methods, signatures that yield accurate predictions may still have a high FDR. Further, we show that even signatures with low FDR may fail to replicate in independent studies due to limited statistical power. Thus, neither stability nor predictive accuracy are relevant when FDR control is the primary goal. We therefore develop a general statistical hypothesis testing framework that for the first time provides FDR control for signature discovery. Our method is demonstrated to be correct in simulation studies. When applied to five cancer data sets, the method was able to discover molecular signatures with 5% FDR in three cases, while two data sets yielded no significant findings. Conclusion Our approach enables reliable discovery of molecular signatures from genome-wide data with current sample sizes. The statistical framework developed herein is potentially applicable to a wide range of prediction problems in bioinformatics.

  5. Reliability In A White Rabbit Network

    CERN Document Server

    Lipiński, M; Wlostowski, T; Prados, C

    2011-01-01

    White Rabbit (WR) is a time-deterministic, low-latency Ethernet-based network which enables transparent, subns accuracy timing distribution. It is being developed to replace the General Machine Timing (GMT) system currently used at CERN and will become the foundation for the control system of the Facility for Antiproton and Ion Research (FAIR) at GSI. High reliability is an important issue inWR’s design, since unavailability of the accelerator’s control system will directly translate into expensive downtime of the machine. A typical WR network is required to lose not more than a single message per year. Due toWR’s complexity, the translation of this real-world-requirement into a reliability-requirement constitutes an interesting issue on its own – a WR network is considered functional only if it provides all its services to all its clients at any time. This paper defines reliability in WR and describes how it was addressed by dividing it into sub-domains: deterministic packet delivery, data resilience...

  6. Reliability history of the Apollo guidance computer

    Science.gov (United States)

    Hall, E. C.

    1972-01-01

    The Apollo guidance computer was designed to provide the computation necessary for guidance, navigation and control of the command module and the lunar landing module of the Apollo spacecraft. The computer was designed using the technology of the early 1960's and the production was completed by 1969. During the development, production, and operational phase of the program, the computer has accumulated a very interesting history which is valuable for evaluating the technology, production methods, system integration, and the reliability of the hardware. The operational experience in the Apollo guidance systems includes 17 computers which flew missions and another 26 flight type computers which are still in various phases of prelaunch activity including storage, system checkout, prelaunch spacecraft checkout, etc. These computers were manufactured and maintained under very strict quality control procedures with requirements for reporting and analyzing all indications of failure. Probably no other computer or electronic equipment with equivalent complexity has been as well documented and monitored. Since it has demonstrated a unique reliability history, it is important to evaluate the techniques and methods which have contributed to the high reliability of this computer.

  7. Technical information report: Plasma melter operation, reliability, and maintenance analysis

    Energy Technology Data Exchange (ETDEWEB)

    Hendrickson, D.W. [ed.

    1995-03-14

    This document provides a technical report of operability, reliability, and maintenance of a plasma melter for low-level waste vitrification, in support of the Hanford Tank Waste Remediation System (TWRS) Low-Level Waste (LLW) Vitrification Program. A process description is provided that minimizes maintenance and downtime and includes material and energy balances, equipment sizes and arrangement, startup/operation/maintence/shutdown cycle descriptions, and basis for scale-up to a 200 metric ton/day production facility. Operational requirements are provided including utilities, feeds, labor, and maintenance. Equipment reliability estimates and maintenance requirements are provided which includes a list of failure modes, responses, and consequences.

  8. Osmium uptake, distribution, and 187Os/188Os and 187Re/188Os compositions in Phaeophyceae macroalgae, Fucus vesiculosus: Implications for determining the 187Os/188Os composition of seawater

    Science.gov (United States)

    Racionero-Gómez, B.; Sproson, A. D.; Selby, D.; Gannoun, A.; Gröcke, D. R.; Greenwell, H. C.; Burton, K. W.

    2017-02-01

    The osmium isotopic composition (187Os/188Os) of seawater reflects the balance of input from mantle-, continental- and anthropogenic-derived sources. This study utilizes the Phaeophyceae, Fucus vesiculosus, to analyse its Os abundance and uptake, as well as to assess if macroalgae records the Os isotope composition of the seawater in which it lives. The data demonstrates that Os is not located in one specific biological structure within macroalgae, but is found throughout the organism. Osmium uptake was measured by culturing F. vesiculosus non-fertile tips with different concentrations of Os with a known 187Os/188Os composition (∼0.16), which is significantly different from the background isotopic composition of local seawater (∼0.94). The Os abundance of cultured non-fertile tips show a positive correlation to the concentration of the Os doped seawater. Moreover, the 187Os/188Os composition of the seaweed equalled that of the culture medium, strongly confirming the possible use of macroalgae as a biological proxy for the Os isotopic composition of the seawater.

  9. The macular mapping test: a reliability study

    Directory of Open Access Journals (Sweden)

    Davies Leon N

    2005-08-01

    Full Text Available Abstract Background Age-related macular degeneration (ARMD is the leading cause of visual disability in people over 60 years of age in the developed world. The success of treatment deteriorates with increased latency of diagnosis. The purpose of this study was to determine the reliability of the macular mapping test (MMT, and to investigate its potential as a screening tool. Methods The study population comprised of 31 healthy eyes of 31 participants. To assess reliability, four macular mapping test (MMT measurements were taken in two sessions separated by one hour by two practitioners, with reversal of order in the second session. MMT readings were also taken from 17 age-related maculopathy (ARM, and 12 AMD affected eyes. Results For the normal cohort, average MMT scores ranged from 85.5 to 100.0 MMT points. Scores ranged from 79.0 to 99.0 for the ARM group and from 9.0 to 92.0 for the AMD group. MMT scores were reliable to within ± 7.0 points. The difference between AMD affected eyes and controls (z = 3.761, p = Conclusion The reliability data shows that a change of 14 points or more is required to indicate a clinically significant change. This value is required for use of the MMT as an outcome measure in clinical trials. Although there was no difference between MMT scores from ARM affected eyes and controls, the MMT has the advantage over the Amsler grid in that it uses a letter target, has a peripheral fixation aid, and it provides a numerical score. This score could be beneficial in office and home monitoring of AMD progression, as well as an outcome measure in clinical research.

  10. Automated audiometry using apple iOS-based application technology.

    Science.gov (United States)

    Foulad, Allen; Bui, Peggy; Djalilian, Hamid

    2013-11-01

    The aim of this study is to determine the feasibility of an Apple iOS-based automated hearing testing application and to compare its accuracy with conventional audiometry. Prospective diagnostic study. Setting Academic medical center. An iOS-based software application was developed to perform automated pure-tone hearing testing on the iPhone, iPod touch, and iPad. To assess for device variations and compatibility, preliminary work was performed to compare the standardized sound output (dB) of various Apple device and headset combinations. Forty-two subjects underwent automated iOS-based hearing testing in a sound booth, automated iOS-based hearing testing in a quiet room, and conventional manual audiometry. The maximum difference in sound intensity between various Apple device and headset combinations was 4 dB. On average, 96% (95% confidence interval [CI], 91%-100%) of the threshold values obtained using the automated test in a sound booth were within 10 dB of the corresponding threshold values obtained using conventional audiometry. When the automated test was performed in a quiet room, 94% (95% CI, 87%-100%) of the threshold values were within 10 dB of the threshold values obtained using conventional audiometry. Under standardized testing conditions, 90% of the subjects preferred iOS-based audiometry as opposed to conventional audiometry. Apple iOS-based devices provide a platform for automated air conduction audiometry without requiring extra equipment and yield hearing test results that approach those of conventional audiometry.

  11. Validity and reliability of food security measures.

    Science.gov (United States)

    Cafiero, Carlo; Melgar-Quiñonez, Hugo R; Ballard, Terri J; Kepple, Anne W

    2014-12-01

    This paper reviews some of the existing food security indicators, discussing the validity of the underlying concept and the expected reliability of measures under reasonably feasible conditions. The main objective of the paper is to raise awareness on existing trade-offs between different qualities of possible food security measurement tools that must be taken into account when such tools are proposed for practical application, especially for use within an international monitoring framework. The hope is to provide a timely, useful contribution to the process leading to the definition of a food security goal and the associated monitoring framework within the post-2015 Development Agenda. © 2014 New York Academy of Sciences.

  12. The way to overcome the difficulty in Re-Os dating of molybdenite

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, Katsuhiko; Masuda, Akimasa (Tokyo Univ. (Japan). Faculty of Science)

    1990-11-01

    When a molybdenite was dissolved and treated by the conventional chemical procedure, it was difficult to achieve the isotopic equilibrium between the {sup 187}Os radiogenically accumulated in the molybdenite and 'common' Os added as a kind of internal standard, even after chemically complete decomposition. It is evident that this isotopic disequilibrium effect results in deterioration of Re-Os age for the molybdenite. A newly developed analytical technique employing a microwave digestion was found out to promote the isotopic equilibration of Os from two sources and to provide us with the ages concordant with those obtained by other geochronometers. (author).

  13. SYSTEM ORGANIZATION OF MATERIAL PROVIDING OF BUILDING

    Directory of Open Access Journals (Sweden)

    A. V. Rаdkеvich

    2014-04-01

    Full Text Available Purpose. Development of scientific-methodical bases to the design of rational management of material streams in the field of building providing taking into account intersystem connections with the enterprises of building industry. Methodology. The analysis of last few years of functioning of building industry in Ukraine allows distinguishing a number of problems that negatively influence the steady development of building, as the component of the state economics system. Therefore the research of existent organization methods of the system of building objects providing with material resources is extremely necessary. In connection with this the article justifies the use of method of hierarchies analysis (Saati method for finding the optimal task solution of fixing the enterprises of building industry after building objects. Findings. Results give an opportunity to guidance of building organization to estimate and choose advantageous suppliers - enterprises of building industry, to conduct their rating, estimation taking into account basic descriptions, such as: quality, price, reliability of deliveries, specialization, financial status etc. Originality. On the basis of Saati method the methodologies of organization are improved, planning and managements of the reliable system of providing of building necessary material resources that meet the technological requirements of implementation of building and installation works. Practical value. Contribution to the decisions of many intricate organizational problems that are accompanied by the problems of development of building, provided due to organization of the reliable system of purchase of material resources.

  14. Reliability-based optimization of engineering structures

    DEFF Research Database (Denmark)

    Sørensen, John Dalsgaard

    2008-01-01

    The theoretical basis for reliability-based structural optimization within the framework of Bayesian statistical decision theory is briefly described. Reliability-based cost benefit problems are formulated and exemplitied with structural optimization. The basic reliability-based optimization......-assessment and a reliability-based decision problem for offshore wind turbines....

  15. Applying franchising principles to improving water and sanitation services reliability

    CSIR Research Space (South Africa)

    Wall, K

    2008-11-01

    Full Text Available to improving water and sanitation services reliability K WALL CSIR Built Environment PO Box 395, Pretoria, 0001, South Africa Email: kwall@csir.co.za ABSTRACT CSIR research has found that franchising partnerships could alleviate and address many... business, whereafter it supports and disciplines the business. See Figure 1. The key is the incentive, to franchisor and franchisee alike, to provide improved service consistency, reliability and quality control. (You know what you will be getting...

  16. IPv6 for HelenOS

    OpenAIRE

    Steinhauser, Antonín

    2013-01-01

    This thesis extends HelenOS operating system in order to be IPv6 capa- ble. New IPv6 protocol implementation is on the same level as previous IPv4 protocol implementation. HelenOS networking stack now offers three modes of networking: IPv4-only, IPv6-only and dual stack mode. Dual stack mode enables usage of both protocols at once. The thesis describes previous state of HelenOS networking stack, analyzes differences between IPv4 and IPv6 protocols and gives reasons for single strategic decisi...

  17. Os odontoideum: a significant radiographic finding

    Energy Technology Data Exchange (ETDEWEB)

    Choit, Rachel L.; Reilly, Christopher W. [BC Children' s Hospital, Department of Orthopaedics, Vancouver, BC (Canada); Jamieson, Douglas H. [BC Children' s Hospital, Department of Radiology, Vancouver (Canada)

    2005-08-01

    Os odontoideum can lead to instability of the atlantoaxial joint and places the spinal cord at significant risk for acute catastrophic events after minor trauma or chronic neurological change. We present two cases of os odontoideum in pediatric patients that were not appreciated at earlier remote imaging but were, in retrospect, detectable. One patient presented with an acute spinal cord injury. Incorporating assessment of dens integrity into the evaluation algorithm for all pediatric cervical spine studies should lead to early detection of os odontoideum lesions and allow referral to appropriate clinical spinal services for evaluation, surveillance and possible surgery to prevent future complications. (orig.)

  18. The Re/Os Clock Revisited

    CERN Multimedia

    Leal, L C; Kitis, G; Guber, K H; Quaranta, A; Koehler, P E

    2002-01-01

    The purpose of the proposed project of an accurate measurement of the relevant neutron cross sections of $^{186}$Os and $^{187}$Os is to remove the principal nuclear physics uncertainties in the analysis of the Re/Os cosmochronometer. The necessary cross section information will be obtained in complementary experiments at the nTOF facility at CERN and at the Karlsruhe Van de Graaff accelerator. Transformation of these results into significantly improved stellar reaction rates will allow to evaluate the age of the elements in the framework of galactic chemical evolution models.

  19. Suicidio en niños

    OpenAIRE

    Alma Reyes G; José Lempira Escobar Y; Mayela Valerio H

    1998-01-01

    Trata de un estudio estadístico realizado en Costa Rica por los doctores Alma Reyes, Lempira Escobar y Mayela Valerio, quienes revisaron 16 años de autopsias (1980-1996), encontrando que de 28.584 autopsias, 26 correspondieron a suicidios de niños menores de 13 años de edad. De los 26 casos, el mayor número se presentó entre 1988 y 1991 con 11 casos (42%)de estos 5 casos (19%) se presentaron en 1990. Predominó el sexo masculino con 20 casos y 6 casos fueron del sexo femenino. El mayor grupo d...

  20. Reliability of multi-state consecutive k -out-of- n series and parallel ...

    African Journals Online (AJOL)

    Abstract. In this paper, we focus on multi-state complex systems and their reliability. First, we provide a formula which computes the reliability of consecutive k-out-of-n: G systems. Then, we extend the used method to obtain the reliability of consecutive k-out-of- Ln: G series and consecutive k-out-of-Ln: G parallel systems.

  1. An Innovative Excel Application to Improve Exam Reliability in Marketing Courses

    Science.gov (United States)

    Keller, Christopher M.; Kros, John F.

    2011-01-01

    Measures of survey reliability are commonly addressed in marketing courses. One statistic of reliability is "Cronbach's alpha." This paper presents an application of survey reliability as a reflexive application of multiple-choice exam validation. The application provides an interactive decision support system that incorporates survey item…

  2. Reliability of Wave Energy Converters

    DEFF Research Database (Denmark)

    Ambühl, Simon

    There are many different working principles for wave energy converters (WECs) which are used to produce electricity from waves. In order for WECs tobecome successful and more competitive to other renewable electricity sources,the consideration of the structural reliability of WECs is essential...... for welded structures at the Wavestar device includingdifferent control systems for harvesting energy from waves. In addition, a casestudy of different O&M strategies for WECs is discussed, and an example ofreliability-based structural optimization of the Wavestar foundation ispresented. The work performed.......Structural reliability considerations and optimizations impact operation andmaintenance (O&M) costs as well as the initial investment costs.Furthermore, there is a control system for WEC applications which defines theharvested energy but also the loads onto the structure. Therefore, extremeloads but also fatigue loads...

  3. Reliability analysis of component of affination centrifugal 1 machine by using reliability engineering

    Science.gov (United States)

    Sembiring, N.; Ginting, E.; Darnello, T.

    2017-12-01

    Problems that appear in a company that produces refined sugar, the production floor has not reached the level of critical machine availability because it often suffered damage (breakdown). This results in a sudden loss of production time and production opportunities. This problem can be solved by Reliability Engineering method where the statistical approach to historical damage data is performed to see the pattern of the distribution. The method can provide a value of reliability, rate of damage, and availability level, of an machine during the maintenance time interval schedule. The result of distribution test to time inter-damage data (MTTF) flexible hose component is lognormal distribution while component of teflon cone lifthing is weibull distribution. While from distribution test to mean time of improvement (MTTR) flexible hose component is exponential distribution while component of teflon cone lifthing is weibull distribution. The actual results of the flexible hose component on the replacement schedule per 720 hours obtained reliability of 0.2451 and availability 0.9960. While on the critical components of teflon cone lifthing actual on the replacement schedule per 1944 hours obtained reliability of 0.4083 and availability 0.9927.

  4. Provider of Services File

    Data.gov (United States)

    U.S. Department of Health & Human Services — The POS file consists of two data files, one for CLIA labs and one for 18 other provider types. The file names are CLIA and OTHER. If downloading the file, note it...

  5. The Provident Principal.

    Science.gov (United States)

    McCall, John R.

    This monograph offers leadership approaches for school principals. Discussion applies the business leadership theory of Warren Bennis and Burt Nanus to the role of the principal. Each of the booklet's three parts concludes with discussion questions. Part 1, "Visions and Values for the Provident Principal," demonstrates the importance of…

  6. What HERA may provide?

    Energy Technology Data Exchange (ETDEWEB)

    Jung, Hannes [DESY, Hamburg (Germany); De Roeck, Albert [CERN, Genf (Switzerland); Bartles, Jochen [Univ. Hamburg (DE). Institut fuer Theoretische Physik II] (and others)

    2008-09-15

    More than 100 people participated in a discussion session at the DIS08 workshop on the topic What HERA may provide. A summary of the discussion with a structured outlook and list of desirable measurements and theory calculations is given. (orig.)

  7. care Providers in Ibadan

    African Journals Online (AJOL)

    Three hundred and eighty six respondents (77.7%) were aware of intermittent preventive treatment (IPT). Awareness ... Key Words: malaria in pregnancy, intermittent preventive treatment, malaria control, health care providers. Department of Obstetrics .... Auxiliary nurses do not have formal training prior to employment.

  8. Developing Ultra Reliable Life Support for the Moon and Mars

    Science.gov (United States)

    Jones, Harry W.

    2009-01-01

    Recycling life support systems can achieve ultra reliability by using spares to replace failed components. The added mass for spares is approximately equal to the original system mass, provided the original system reliability is not very low. Acceptable reliability can be achieved for the space shuttle and space station by preventive maintenance and by replacing failed units, However, this maintenance and repair depends on a logistics supply chain that provides the needed spares. The Mars mission must take all the needed spares at launch. The Mars mission also must achieve ultra reliability, a very low failure rate per hour, since it requires years rather than weeks and cannot be cut short if a failure occurs. Also, the Mars mission has a much higher mass launch cost per kilogram than shuttle or station. Achieving ultra reliable space life support with acceptable mass will require a well-planned and extensive development effort. Analysis must define the reliability requirement and allocate it to subsystems and components. Technologies, components, and materials must be designed and selected for high reliability. Extensive testing is needed to ascertain very low failure rates. Systems design should segregate the failure causes in the smallest, most easily replaceable parts. The systems must be designed, produced, integrated, and tested without impairing system reliability. Maintenance and failed unit replacement should not introduce any additional probability of failure. The overall system must be tested sufficiently to identify any design errors. A program to develop ultra reliable space life support systems with acceptable mass must start soon if it is to produce timely results for the moon and Mars.

  9. Reliability Validation and Improvement Framework

    Science.gov (United States)

    2012-11-01

    of failure occurrences of many reliability predictions, taking on the form of fault tree analysis (FTA), and failure mode and effects analysis ( FMEA ...and its potential negative impact. As the system design progresses, fault tree analysis (FTA) and failure mode and effect analysis ( FMEA ) are used to...predictions such as Mean Time To Failure (MTTF) to FHA, fault impact such as FMEA , and FTA [Rugina 2008, Joshi 2007, Bozzano 2009]. • A Behavior

  10. RELIABILITY OF LENTICULAR EXPANSION COMPENSATORS

    Directory of Open Access Journals (Sweden)

    Gabriel BURLACU,

    2011-11-01

    Full Text Available Axial lenticular compensators are made to take over the longitudinal heat expansion, shock , vibration and noise, made elastic connections for piping systems. In order to have a long life for installations it is necessary that all elements, including lenticular compensators, have a good reliability. This desire can be did by technology of manufactoring and assembly of compensators, the material for lenses and by maintenance.of compensator

  11. Reliable Function Approximation and Estimation

    Science.gov (United States)

    2016-08-16

    scope of applications . During the tenure of this award, as anticipated, the PI developed a range of reliable and structure-aware sampling theorems based ...geometric mean inequality for products of three matrices . A Israel, F Krahmer, and R Ward. Linear Algebra and its Applications 488, 2016. 1-12. (O3...searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments

  12. Reliability Research for Photovoltaic Modules

    Science.gov (United States)

    Ross, Ronald J., Jr.

    1986-01-01

    Report describes research approach used to improve reliability of photovoltaic modules. Aimed at raising useful module lifetime to 20 to 30 years. Development of cost-effective solutions to module-lifetime problem requires compromises between degradation rates, failure rates, and lifetimes, on one hand, and costs of initial manufacture, maintenance, and lost energy, on other hand. Life-cycle costing integrates disparate economic terms, allowing cost effectiveness to be quantified, allowing comparison of different design alternatives.

  13. Towards Reliable Integrated Services for Dependable Systems

    OpenAIRE

    Schiøler, Henrik; Ravn, Anders Peter; Izadi-Zamanabadi, Roozbeh; Nielsen, Kirsten Mølgaard; Madsen, Ole Brun; Nielsen, Jens Frederik Dalsgaard

    2003-01-01

    Reliability issues for various technical systems are discussed and focus is directed towards distributed systems, where communication facilities are vital to maintain system functionality. Reliability in communication subsystems is considered as a resource to be shared among a number of logical connections and a reliability management framework is suggested. We suggest a network layer level reliability management protocol RRSVP (Reliability Resource Reservation Protocol) as a counterpart of t...

  14. Reliability engineering theory and practice

    CERN Document Server

    Birolini, Alessandro

    2017-01-01

    This book shows how to build in and assess reliability, availability, maintainability, and safety (RAMS) of components, equipment, and systems. It presents the state of the art of reliability (RAMS) engineering, in theory & practice, and is based on over 30 years author's experience in this field, half in industry and half as Professor of Reliability Engineering at the ETH, Zurich. The book structure allows rapid access to practical results. Methods & tools are given in a way that they can be tailored to cover different RAMS requirement levels. Thanks to Appendices A6 - A8 the book is mathematically self-contained, and can be used as a textbook or as a desktop reference with a large number of tables (60), figures (210), and examples / exercises^ 10,000 per year since 2013) were the motivation for this final edition, the 13th since 1985, including German editions. Extended and carefully reviewed to improve accuracy, it represents the continuous improvement effort to satisfy reader's needs and confidenc...

  15. Reliability of surface facial electromyography.

    Science.gov (United States)

    Hess, Ursula; Arslan, Ruben; Mauersberger, Heidi; Blaison, Christophe; Dufner, Michael; Denissen, Jaap J A; Ziegler, Matthias

    2017-01-01

    Data from two studies were used to estimate the reliability of facial EMG when used to index facial mimicry (Study 1) or affective reactions to pictorial stimuli (Study 2). Results for individual muscle sites varied between muscles and depending on data treatment. For difference scores, acceptable internal consistencies were found only for corrugator supercilii, and test-retest reliabilities were low. For contrast measures describing patterns of reactions to stimuli, such as high zygomaticus major combined with low corrugator supercilii, acceptable internal consistencies were found for facial reactions to smiling faces and positive affective reactions to affiliative images (Study 2). Facial reactions to negative emotions (Study 1) and facial reactions to power and somewhat less to achievement imagery (Study 2) showed unsatisfactory internal consistencies. For contrast measures, good temporal stability over 24 months (Study 1) and 15 months (Study 2), respectively, was obtained. In Study 1, the effect of method factors such as mode of presentation was more reliable than the emotion effect. Overall, people's facial reactions to affective stimuli seem to be influenced by a variety of factors other than the emotion-eliciting element per se, which resulted in biased internal consistency estimates. However, the influence of these factors in turn seemed to be stable over time. © 2016 Society for Psychophysiological Research.

  16. Internet Medline providers.

    Science.gov (United States)

    Vine, D L; Coady, T R

    1998-01-01

    Each database in this review has features that will appeal to some users. Each provides a credible interface to information available within the Medline database. The major differences are pricing and interface design. In this context, features that cost more and might seem trivial to the occasional searcher may actually save time and money when used by the professional. Internet Grateful Med is free, but Ms. Coady and I agree the availability of only three ANDable search fields is a major functional limitation. PubMed is also free but much more powerful. The command line interface that permits very sophisticated searches requires a commitment that casual users will find intimidating. Ms. Coady did not believe the feedback currently provided during a search was sufficient for sustained professional use. Paper Chase and Knowledge Finder are mature, modestly priced Medline search services. Paper Chase provides a menu-driven interface that is very easy to use, yet permits the user to search virtually all of Medline's data fields. Knowledge Finder emphasizes the use of natural language queries but fully supports more traditional search strategies. The impact of the tradeoff between fuzzy and Boolean strategies offered by Knowledge Finder is unclear and beyond the scope of this review. Additional software must be downloaded to use all of Knowledge Finders' features. Other providers required no software beyond the basic Internet browser, and this requirement prevented Ms. Coady from evaluating Knowledge Finder. Ovid and Silver Platter offer well-designed interfaces that simplify the construction of complex queries. These are clearly services designed for professional users. While pricing eliminates these for casual use, it should be emphasized that Medline citation access is only a portion of the service provided by these high-end vendors. Finally, we should comment that each of the vendors and government-sponsored services provided prompt and useful feedback to e

  17. Mac OS X Tiger for Unix Geeks

    CERN Document Server

    Jepson, Brian

    2005-01-01

    If you're one of the many Unix developers drawn to Mac OS X for its Unix core, you'll find yourself in surprisingly unfamiliar territory. Unix and Mac OS X are kissing cousins, but there are enough pitfalls and minefields in going from one to another that even a Unix guru can stumble, and most guides to Mac OS X are written for Mac aficionados. For a Unix developer, approaching Tiger from the Mac side is a bit like learning Russian by reading the Russian side of a Russian-English dictionary. Fortunately, O'Reilly has been the Unix authority for over 25 years, and in Mac OS X Tiger for Unix Gee

  18. Space Shuttle Program Primary Avionics Software System (PASS) Success Legacy - Quality and Reliability Date

    Science.gov (United States)

    Orr, James K.; Peltier, Daryl

    2010-01-01

    Thsi slide presentation reviews the avionics software system on board the space shuttle, with particular emphasis on the quality and reliability. The Primary Avionics Software System (PASS) provides automatic and fly-by-wire control of critical shuttle systems which executes in redundant computers. Charts given show the number of space shuttle flights vs time, PASS's development history, and other charts that point to the reliability of the system's development. The reliability of the system is also compared to predicted reliability.

  19. High-Performance, Reliable Multicasting: Foundations for Future Internet Groupware Applications

    Science.gov (United States)

    Callahan, John; Montgomery, Todd; Whetten, Brian

    1997-01-01

    Network protocols that provide efficient, reliable, and totally-ordered message delivery to large numbers of users will be needed to support many future Internet applications. The Reliable Multicast Protocol (RMP) is implemented on top of IP multicast to facilitate reliable transfer of data for replicated databases and groupware applications that will emerge on the Internet over the next decade. This paper explores some of the basic questions and applications of reliable multicasting in the context of the development and analysis of RMP.

  20. Providing plastic zone extrusion

    Science.gov (United States)

    Manchiraju, Venkata Kiran; Feng, Zhili; David, Stan A.; Yu, Zhenzhen

    2017-04-11

    Plastic zone extrusion may be provided. First, a compressor may generate frictional heat in stock to place the stock in a plastic zone of the stock. Then, a conveyer may receive the stock in its plastic zone from the compressor and transport the stock in its plastic zone from the compressor. Next, a die may receive the stock in its plastic zone from the conveyer and extrude the stock to form a wire.

  1. Compliance of blood donation apps with mobile OS usability guidelines.

    Science.gov (United States)

    Ouhbi, Sofia; Fernández-Alemán, José Luis; Pozo, José Rivera; Bajta, Manal El; Toval, Ambrosio; Idri, Ali

    2015-06-01

    The aim of this paper is to employ the guidelines of Android, iOS, Blackberry and Windows Phone to analyze the usability compliance of free blood donation (BD) apps. An analysis process based on a systematic review protocol is used to select free BD apps. An assessment is conducted using a questionnaire composed of 13 questions concerning the compliance of free BD apps with Android, Blackberry, iOS and Windows Phone usability guidelines. A total of 133 free BD apps have been selected from the 188 BD apps identified. Around 63% of the free BD apps selected have a good compliance with mobile OS usability recommendations. Around 72% of Android, 57% of Windows Phone, 33% of iOS and 33% of Blackberry BD apps have a high usability score. The aspect of BD app behavior should be improved along with some style components: the use of pictures to explain ideas and the adaptation of the app to both horizontal and vertical orientations. Structure patterns should also be used to improve the structure aspect of a BD app. Usability is a quality aspect that should be improved in current BD apps. Our study provides smartphone users with a list of usable free BD apps and BD app developers with recommendations.

  2. Developing safety performance functions incorporating reliability-based risk measures.

    Science.gov (United States)

    Ibrahim, Shewkar El-Bassiouni; Sayed, Tarek

    2011-11-01

    Current geometric design guides provide deterministic standards where the safety margin of the design output is generally unknown and there is little knowledge of the safety implications of deviating from these standards. Several studies have advocated probabilistic geometric design where reliability analysis can be used to account for the uncertainty in the design parameters and to provide a risk measure of the implication of deviation from design standards. However, there is currently no link between measures of design reliability and the quantification of safety using collision frequency. The analysis presented in this paper attempts to bridge this gap by incorporating a reliability-based quantitative risk measure such as the probability of non-compliance (P(nc)) in safety performance functions (SPFs). Establishing this link will allow admitting reliability-based design into traditional benefit-cost analysis and should lead to a wider application of the reliability technique in road design. The present application is concerned with the design of horizontal curves, where the limit state function is defined in terms of the available (supply) and stopping (demand) sight distances. A comprehensive collision and geometric design database of two-lane rural highways is used to investigate the effect of the probability of non-compliance on safety. The reliability analysis was carried out using the First Order Reliability Method (FORM). Two Negative Binomial (NB) SPFs were developed to compare models with and without the reliability-based risk measures. It was found that models incorporating the P(nc) provided a better fit to the data set than the traditional (without risk) NB SPFs for total, injury and fatality (I+F) and property damage only (PDO) collisions. Copyright © 2011 Elsevier Ltd. All rights reserved.

  3. Os conflitos conjugais na perspectiva dos filhos

    Directory of Open Access Journals (Sweden)

    Viviane Ribeiro Goulart

    2013-01-01

    Full Text Available Se investigó sobre la perspectiva de los hijos en los conflictos conyugales. Participaron 17 estudiantes de una escuela pública de Porto Alegre (RS, de ambos sexos, reunidos en dos grupos focales: uno con 8 niños (8-9 años, y otro con 9 jóvenes (12-13 años, que vivían con sus padres. Cada grupo ha tenido sólo una cita en la escuela. Las informaciones fueron grabadas, transcritas y el contenido analizado a partir de los temas emergentes. De acuerdo con los niños, los conflictos conyugales van desde una discusión hasta la agresión física, son recurrientes, versan sobre cualquier tema, y su expresión es predominantemente negativa. Los niños reconocen la existencia del conflicto pero ni siempre entienden sus causas y todavía sufren sus consecuencias. Los niños adoptan distintas estrategias para lidiar con los conflictos, desde ignorarlos hasta las actitudes autodestructivas. Se concluye que los sujetos son conscientes de los conflictos conyugales de sus padres y reconocen sus repercusiones.

  4. A Highly Flexible, Automated System Providing Reliable Sample Preparation in Element- and Structure-Specific Measurements.

    Science.gov (United States)

    Vorberg, Ellen; Fleischer, Heidi; Junginger, Steffen; Liu, Hui; Stoll, Norbert; Thurow, Kerstin

    2016-10-01

    Life science areas require specific sample pretreatment to increase the concentration of the analytes and/or to convert the analytes into an appropriate form for the detection and separation systems. Various workstations are commercially available, allowing for automated biological sample pretreatment. Nevertheless, due to the required temperature, pressure, and volume conditions in typical element and structure-specific measurements, automated platforms are not suitable for analytical processes. Thus, the purpose of the presented investigation was the design, realization, and evaluation of an automated system ensuring high-precision sample preparation for a variety of analytical measurements. The developed system has to enable system adaption and high performance flexibility. Furthermore, the system has to be capable of dealing with the wide range of required vessels simultaneously, allowing for less cost and time-consuming process steps. However, the system's functionality has been confirmed in various validation sequences. Using element-specific measurements, the automated system was up to 25% more precise compared to the manual procedure and as precise as the manual procedure using structure-specific measurements. © 2015 Society for Laboratory Automation and Screening.

  5. The Amsterdam preoperative anxiety and information scale provides a simple and reliable measure of preoperative anxiety.

    Science.gov (United States)

    Boker, Abdulaziz; Brownell, Laurence; Donen, Neil

    2002-10-01

    To compare three anxiety scales; the anxiety visual analogue scale (VAS), the anxiety component of the Amsterdam preoperative anxiety and information scale (APAIS), and the state portion of the Spielburger state-trait anxiety inventory (STAI), for assessment of preoperative anxiety levels in same day admission patients. Patients completed the three anxiety assessment scales both before and after seeing the anesthesiologist preoperatively. The scales used were the STAI, the six-question APAIS, and the VAS. APAIS was further subdivided to assess anxiety about anesthesia (sum A), anxiety about surgery (sum S) and a combined anxiety total (i.e., sum C = sum A + sum S). These scales were compared to one another. Pearson's correlation (pair-wise deletion) was used for validity testing. Cronbach's alpha analysis was used to test internal validity of the various components of the APAIS scale. A correlation co-efficient (r) > or = 0.6 and P scale sets were completed by 197 patients. There was significant and positive correlation between VAS and STAI r = 0.64, P anxiety components of the APAIS (sum C) and desire for information were 0.84 and 0.77 respectively. In addition to VAS, the anxiety component of APAIS (sum C) is a promising new practical tool to assess preoperative patient anxiety levels.

  6. Citation analysis did not provide a reliable assessment of core outcome set uptake.

    Science.gov (United States)

    Barnes, Karen L; Kirkham, Jamie J; Clarke, Mike; Williamson, Paula R

    2017-06-01

    The aim of the study was to evaluate citation analysis as an approach to measuring core outcome set (COS) uptake, by assessing whether the number of citations for a COS report could be used as a surrogate measure of uptake of the COS by clinical trialists. Citation data were obtained for COS reports published before 2010 in five disease areas (systemic sclerosis, rheumatoid arthritis, eczema, sepsis and critical care, and female sexual dysfunction). Those publications identified as a report of a clinical trial were examined to identify whether or not all outcomes in the COS were measured in the trial. Clinical trials measuring the relevant COS made up a small proportion of the total number of citations for COS reports. Not all trials citing a COS report measured all the recommended outcomes. Some trials cited the COS reports for other reasons, including the definition of a condition or other trial design issues addressed by the COS report. Although citation data can be readily accessed, it should not be assumed that the citing of a COS report indicates that a trial has measured the recommended COS. Alternative methods for assessing COS uptake are needed. Copyright © 2017 The Authors. Published by Elsevier Inc. All rights reserved.

  7. Providing Compassion through Flow

    Directory of Open Access Journals (Sweden)

    Lydia Royeen

    2015-07-01

    Full Text Available Meg Kral, MS, OTR/L, CLT, is the cover artist for the Summer 2015 issue of The Open Journal of Occupational Therapy. Her untitled piece of art is an oil painting and is a re-creation of a photograph taken while on vacation. Meg is currently supervisor of outpatient services at Rush University Medical Center. She is lymphedema certified and has a specific interest in breast cancer lymphedema. Art and occupational therapy serve similar purposes for Meg: both provide a sense of flow. She values the outcomes, whether it is a piece of art or improved functional status

  8. Providing Contraception to Adolescents.

    Science.gov (United States)

    Raidoo, Shandhini; Kaneshiro, Bliss

    2015-12-01

    Adolescents have high rates of unintended pregnancy and face unique reproductive health challenges. Providing confidential contraceptive services to adolescents is important in reducing the rate of unintended pregnancy. Long-acting contraception such as the intrauterine device and contraceptive implant are recommended as first-line contraceptives for adolescents because they are highly effective with few side effects. The use of barrier methods to prevent sexually transmitted infections should be encouraged. Adolescents have limited knowledge of reproductive health and contraceptive options, and their sources of information are often unreliable. Access to contraception is available through a variety of resources that continue to expand. Copyright © 2015 Elsevier Inc. All rights reserved.

  9. Ysla S. Catalina & Providence

    OpenAIRE

    Diazgranados, Carlos Nicolás; Torres Carreño, Guillermo Andrés; Castell, Edmon; Moreno, Santiago; Ramirez, Natalia

    2010-01-01

    Esta Hoja de Mano pertenece a la exposición temporal "Ysla S. Catalina & Providence". Contiene un resumen histórico de las Islas de Santa Catalina y Providencia en los idiomas inglés y español y un mapa del siglo VI que lo hace más didáctico apoyado por figuras recortables. Esta muestra hace parte del proyecto IDA y VUELTA del Sistema de Patrimonio Cultural y Museos SPM que gestiona la descentralización del patrimonio cultural de la Universidad Nacional de Colombia a otras ciudades del pa...

  10. OsPEX11, a peroxisomal biogenesis factor 11, contributes to salt stress tolerance in Oryza sativa

    Directory of Open Access Journals (Sweden)

    Cui Peng

    2016-09-01

    Full Text Available Peroxisomes are single membrane-bound organelles, whose basic enzymatic constituents are catalase and H2O2-producing flavin oxidases. Previous reports showed that peroxisome is involved in numerous processes including primary and secondary metabolism, plant development and abiotic stress responses. However, knowledge on the function of different peroxisome genes from rice and its regulatory roles in salt and other abiotic stresses is limited. Here, a novel prey protein, OsPEX11 (Os03g0302000, was screened and identified by yeast two-hybrid and GST pull down assays. Phenotypic analysis of OsPEX11 overexpression seedlings demonstrated that they had better tolerance to salt stress than wild type and OsPEX11-RNAi seedlings. Compared with wild type and OsPEX11-RNAi seedlings, overexpression of OsPEX11 had lower level of lipid peroxidation, Na+/K+ ratio, higher activities of antioxidant enzymes (SOD, POD and CAT and proline accumulation. Furthermore, qPCR data suggested that OsPEX11 acted as a positive regulator of salt tolerance by reinforcing the expression of several well-known rice transporters (OsHKT2;1, OsHKT1;5, OsLti6a, OsLti6b, OsSOS1, OsNHX1 and OsAKT1 involved in Na+/K+ homeostasis in transgenic plants under salinity. Ultrastructural observations of OsPEX11-RNAi seedlings showed that they were less sensitive to salt stress than wild type and overexpression lines. These results provide experimental evidence that OsPEX11 is an important gene implicated in Na+ and K+ regulation, and plays a critical role in salt stress tolerance by modulating the expression of cation transporters and antioxidant defense. Thus, OsPEX11 could be considered in transgenic breeding for improvement of salt stress tolerance in rice crop.

  11. Reliability-Based Optimization in Structural Engineering

    DEFF Research Database (Denmark)

    Enevoldsen, I.; Sørensen, John Dalsgaard

    1994-01-01

    In this paper reliability-based optimization problems in structural engineering are formulated on the basis of the classical decision theory. Several formulations are presented: Reliability-based optimal design of structural systems with component or systems reliability constraints, reliability......-based optimal inspection planning and reliability-based experiment planning. It is explained how these optimization problems can be solved by application of similar techniques. The reliability estimation is limited to first order reliability methods (FORM) for both component and systems reliability evaluation....... The solution strategies applying first order non-linear optimization algorithms are described in detail with special attention to sensitivity analysis and stability of the optimization process. Furthermore, several practical aspects are treated as: Development of the reliability-based optimization model...

  12. Reliability and Security - Convergence or Divergence

    Directory of Open Access Journals (Sweden)

    Emil BURTESCU

    2010-01-01

    Full Text Available Reliability, as every technical field, must adapt to the new demands imposed by reality. Started initially as a field designed to control and ensure the smooth functionality of an element or technical system, reliability has reached the stage where the discussion is about the reliability management, similar to the other top-level fields. Security has its own contribution to the reliability of a system; a reliable system is a system with reliable security. In order for a system to be reliable, that means clear and safe, all its components must be reliable. In the following pages we will talk about the two main facts - reliability and security - to determine both the convergence and the divergence points.

  13. 186Os/188Os Isotopic Compositions of Peridotites: Constraints on Melt Depletion and Pt/Os Evolution of the Upper Mantle

    Science.gov (United States)

    Chatterjee, R. N.; Lassiter, J. C.

    2014-12-01

    Global correlations between Al2O3 and Pt/Os in mantle peridotites suggest that Pt behaves incompatibly relative to Os during partial melting [c.f., 1]. Because 190Pt decays to 186Os (t1/2 = 468 Ga), correlations between 186Os/188Os and peridotite fertility can be used to constrain the long-term Pt/Os evolution of the depleted mantle and the initial Pt/Os ratio of the primitive upper mantle (PUM). We examined 186Os/188Os in mantle peridotites from continental (Rio Grande Rift/Colorado Plateau) and oceanic (Lena Trough, Hawaiian Islands) settings that span a wide range in fertility (Al2O3 ~0.67-4.42 %) and 187Os/188Os ratios (0.1138-0.1305). The new data define a narrow range in 186Os/188Os (0.1198338 to 0.1198393, 2 SD~24 ppm), placing constraints on long-term Pt/Os variability in the DMM. 186Os/188Os is broadly correlated with indices of melt depletion including spinel Cr#, clinopyroxene Cr#, and clinopyroxene Yb content, consistent with the inferred relative compatibility of Pt and Os during partial melting. Extrapolation of the alumina-186Os/188Os trend to PUM alumina content (~4.5 wt% Al2O3; [2]) suggests a PUM 186Os/188Os of ~0.1198380±15, similar to the 186Os/188Os of H chondrites (~0.1198398±16; [3]). This 186Os/188Os value is consistent with a PUM Pt/Os of 1.8±0.3, similar to Pt/Os values measured in several classes of chondrites (Carbonaceous ~1.9±0.2, Ordinary ~2.0±0.3 and Enstatite ~1.9±0.2; [3]). Whereas ~84% of peridotites worldwide [excluding low-[Os] samples (age). This suggests that much of the observed Pt/Os variability in mantle peridotites is relatively recent. Close agreement between our inferred Pt/OsPUM with previous estimates inferred from chondrites [3] is consistent with the addition of a chondritic late veneer to explain the HSE abundances in the upper mantle. [1] Becker et al., GCA 2006; [2] McDonough et al., Chem Geo 1995; [3] Brandon et al., GCA 2006

  14. HUMAN RELIABILITY ANALYSIS FOR COMPUTERIZED PROCEDURES

    Energy Technology Data Exchange (ETDEWEB)

    Ronald L. Boring; David I. Gertman; Katya Le Blanc

    2011-09-01

    This paper provides a characterization of human reliability analysis (HRA) issues for computerized procedures in nuclear power plant control rooms. It is beyond the scope of this paper to propose a new HRA approach or to recommend specific methods or refinements to those methods. Rather, this paper provides a review of HRA as applied to traditional paper-based procedures, followed by a discussion of what specific factors should additionally be considered in HRAs for computerized procedures. Performance shaping factors and failure modes unique to computerized procedures are highlighted. Since there is no definitive guide to HRA for paper-based procedures, this paper also serves to clarify the existing guidance on paper-based procedures before delving into the unique aspects of computerized procedures.

  15. Trusted Interconnections Between a Centralized Controller and Commercial Building HVAC Systems for Reliable Demand Response

    National Research Council Canada - National Science Library

    Jones, C. Birk; Carter, Cedric

    2017-01-01

    .... Increased operability can be achieved using a secure and reliable interconnection device, which can provide direct bidirectional communications between the utility and the building automation system (BAS) controllers...

  16. Luto da equipe: revelações dos profissionais de enfermagem sobre o cuidado à criança/adolescente no processo de morte e morrer Luto del equipo: revelaciones de los profesionales de enfermería sobre el cuidado a niños/adolescentes en el proceso de muerte y morir Team mourning: revelations of nursing professionals on the care provided to children/adolescents in the process of death/dying

    Directory of Open Access Journals (Sweden)

    Juliana Cardeal da Costa

    2005-04-01

    Full Text Available Para os profissionais de enfermagem a morte é a maior vilã de seu trabalho, uma vez que, de maneira geral, são educados para cuidar somente da vida. O objetivo do presente estudo é investigar como os profissionais de enfermagem vivenciam o luto frente à morte de crianças/adolescentes hospitalizados, Através de pesquisa descritiva-exploratória com abordagem qualitativa. A coleta de dados foi realizada mediante entrevistas com profissionais de enfermagem que trabalham em clínicas com leitos pediátricos em um hospital-escola. Os dados empíricos evidenciaram que esses profissionais necessitam de suporte emocional para viverem o luto e prevenirem a Síndrome de Burnout. Recomenda-se que seja incluído nos currículos o tema da morte e que as instituições hospitalares busquem a educação permanente como estratégia para promover mudanças de atitudes e comportamentos dos profissionais junto ao paciente que está morrendo.Para los profesionales de enfermería, la muerte es la mayor villana de su trabajo, una vez que, de manera general, son educados para cuidar solamente de la vida. El objetivo de este estudio es investigar como los profesionales de enfermería vivencian el luto frente a la muerte de niños/adolescentes hospitalizados. Así, fue utilizada una investigación descriptiva exploratoria con abordaje cualitativo. La recolección de datos fue realizada a través de entrevistas con profesionales de enfermería que trabajan en clínicas con camas pediátricas en un hospital escuela. Los datos empíricos evidenciaron que esos profesionales necesitan de soporte emocional para experimentar el luto y prevenirse del Síndrome de Burnout. Recomendamos que el tema muerte sea incluido en los currículos y que las instituciones hospitalarias busquen la educación permanente como estrategia para promover cambios de actitudes y comportamientos de los profesionales ante el paciente que está muriendo.For nursing professionals, death is the

  17. Robust and reliable fuel cells; Robusta och tillfoerlitliga braensleceller

    Energy Technology Data Exchange (ETDEWEB)

    Nordlund, Joakim [Cellkraft AB, Stockholm (Sweden)

    2012-03-15

    For fuel cells to be a viable alternative for backup power in applications, where reliability is a critical factor, the reliability of fuel cells has to be high and documented. Based on intrinsic properties of fuel cells, it is safe to argue that it is possible to make them highly reliable, but to unleash the full reliability potential of fuel cells, some great engineering work has to be performed. Cellkraft has since many years been addressing this issue and this project is an important piece of this puzzle. The project included both a large number of laboratory testing of fuel cells and long experiments in field environment to verify the results from the laboratory work. The development work performed within this project is a solid base for the continuous work to fulfil Cellkraft's own, tough, technical reliability targets. The project targets below were achieved within this project: 1. The fuel cell start with 100 % reliability. 2. The fuel cell provides nominal power within 30 seconds in 100 % of the cases. 3. The fuel cell keeps providing nominal power as long as there is a demand in 100 % of the cases. 4. No cell in the fuel cell deviates from the mean cell potential with more than 0,1 V at full power.

  18. Reliability Quantification of Advanced Stirling Convertor (ASC) Components

    Science.gov (United States)

    Shah, Ashwin R.; Korovaichuk, Igor; Zampino, Edward

    2010-01-01

    The Advanced Stirling Convertor, is intended to provide power for an unmanned planetary spacecraft and has an operational life requirement of 17 years. Over this 17 year mission, the ASC must provide power with desired performance and efficiency and require no corrective maintenance. Reliability demonstration testing for the ASC was found to be very limited due to schedule and resource constraints. Reliability demonstration must involve the application of analysis, system and component level testing, and simulation models, taken collectively. Therefore, computer simulation with limited test data verification is a viable approach to assess the reliability of ASC components. This approach is based on physics-of-failure mechanisms and involves the relationship among the design variables based on physics, mechanics, material behavior models, interaction of different components and their respective disciplines such as structures, materials, fluid, thermal, mechanical, electrical, etc. In addition, these models are based on the available test data, which can be updated, and analysis refined as more data and information becomes available. The failure mechanisms and causes of failure are included in the analysis, especially in light of the new information, in order to develop guidelines to improve design reliability and better operating controls to reduce the probability of failure. Quantified reliability assessment based on fundamental physical behavior of components and their relationship with other components has demonstrated itself to be a superior technique to conventional reliability approaches based on utilizing failure rates derived from similar equipment or simply expert judgment.

  19. Accessibility, reliability, and usability of neurosurgical resources.

    Science.gov (United States)

    Agarwal, Nitin; Kommana, Sumana S; Hansberry, David R; Kashkoush, Ahmed I; Friedlander, Robert M; Lunsford, L Dade

    2017-04-01

    OBJECTIVE Closing the knowledge gap that exists between patients and health care providers is essential and is facilitated by easy access to patient education materials. Although such information has the potential to be an effective resource, it must be written in a user-friendly and understandable manner, especially when such material pertains to specialized and highly technical fields such as neurological surgery. The authors evaluated the accessibility, usability, and reliability of current educational resources provided by the American Association of Neurological Surgeons (AANS), Healthwise, and the National Institute for Neurological Disorders and Stroke (NINDS). METHODS Online neurosurgical patient education information provided by AANS, Healthwise, and NINDS was evaluated using the LIDA scale, a website quality assessment tool, by medical professionals and nonmedical professionals. A high achieving score is regarded as 90% or greater using the LIDA scale. RESULTS Accessibility scores were 76.7% (AANS), 83.3% (Healthwise), and 75.0% (NINDS). Average usability scores for the AANS, Healthwise, and NINDS were 73.3%, 82.6%, and 82.9%, respectively, when evaluated by medical professionals and 78.5%, 80.7%, and 75.9%, respectively, for nonmedical professionals, respectively. Average reliability scores were 58.5%, 53.3%, 72.6%, respectively, for medical professionals and 70.4%, 66.7%, and 78.5%, respectively, for nonmedical professionals when evaluating the AANS, Healthwise, and NINDS websites. CONCLUSIONS Although organizations like AANS, Healthwise, and NINDS should be commended for their ongoing commitment to provide health care-oriented materials, modification of this material is suggested to improve the patient education value.

  20. Materials and Reliability Handbook for Semiconductor Optical and Electron Devices

    CERN Document Server

    Pearton, Stephen

    2013-01-01

    Materials and Reliability Handbook for Semiconductor Optical and Electron Devices provides comprehensive coverage of reliability procedures and approaches for electron and photonic devices. These include lasers and high speed electronics used in cell phones, satellites, data transmission systems and displays. Lifetime predictions for compound semiconductor devices are notoriously inaccurate due to the absence of standard protocols. Manufacturers have relied on extrapolation back to room temperature of accelerated testing at elevated temperature. This technique fails for scaled, high current density devices. Device failure is driven by electric field or current mechanisms or low activation energy processes that are masked by other mechanisms at high temperature. The Handbook addresses reliability engineering for III-V devices, including materials and electrical characterization, reliability testing, and electronic characterization. These are used to develop new simulation technologies for device operation and ...

  1. Reliable Integration of Terascale Systems with Nanoscale Devices

    Science.gov (United States)

    Naeimi, Helia

    Nanotechnology design has attracted considerable attention in recent years and seems to be the technology for the future generation of the electronic devices, either as scaled and more restricted conventional lithographic technology, or as emerging sublithographic technologies, such as nanowires, carbon nanotubes, NDR (Negative Differential Resistance) devices, or other nanotechnology devices. Each of these technologies provides one or more design benefits including feature-size scaling, high on-off ratios, and faster devices. However, all of these techniques share their most challenging design issue: reliability. Providing reliability is becoming constantly more challenging due to increases in both the device failure rate and system complexity. This work develops techniques that make achieving reliability in such systems feasible with practical area overhead and considerable improvement in area overhead and system reliability compared to related techniques. Conventional reliability techniques focus on low defect and fault rates, i.e., single event upset (SEU). These techniques cannot simply be scaled to larger systems with more unreliable devices. If these techniques are directly applied to the high defect and fault rate of the nanotechnology regime, they suffer impractically high overhead, or they may not achieve the desired reliability. Our approach in this thesis exploits the following design patterns to achieve a considerable area reduction compared to related works and achieve high reliability: (1) Fine-grained reliability: In this technique, the system is partitioned into fine-grained blocks, and the reliability is provided for each block. This technique is used to contain the area overhead and bound the impact on the throughput. (2) Using alternative resources: This technique improves the design quality by sparing other resources when system is tight on one resource. In our work we replace some of the spacial redundancies with temporal redundancy to limit

  2. Reliability Analysis of Wireless Sensor Networks Using Markovian Model

    Directory of Open Access Journals (Sweden)

    Jin Zhu

    2012-01-01

    Full Text Available This paper investigates reliability analysis of wireless sensor networks whose topology is switching among possible connections which are governed by a Markovian chain. We give the quantized relations between network topology, data acquisition rate, nodes' calculation ability, and network reliability. By applying Lyapunov method, sufficient conditions of network reliability are proposed for such topology switching networks with constant or varying data acquisition rate. With the conditions satisfied, the quantity of data transported over wireless network node will not exceed node capacity such that reliability is ensured. Our theoretical work helps to provide a deeper understanding of real-world wireless sensor networks, which may find its application in the fields of network design and topology control.

  3. Reliability evaluation of microgrid considering incentive-based demand response

    Science.gov (United States)

    Huang, Ting-Cheng; Zhang, Yong-Jun

    2017-07-01

    Incentive-based demand response (IBDR) can guide customers to adjust their behaviour of electricity and curtail load actively. Meanwhile, distributed generation (DG) and energy storage system (ESS) can provide time for the implementation of IBDR. The paper focus on the reliability evaluation of microgrid considering IBDR. Firstly, the mechanism of IBDR and its impact on power supply reliability are analysed. Secondly, the IBDR dispatch model considering customer’s comprehensive assessment and the customer response model are developed. Thirdly, the reliability evaluation method considering IBDR based on Monte Carlo simulation is proposed. Finally, the validity of the above models and method is studied through numerical tests on modified RBTS Bus6 test system. Simulation results demonstrated that IBDR can improve the reliability of microgrid.

  4. OREDA offshore and onshore reliability data volume 1 - topside equipment

    CERN Document Server

    OREDA

    2015-01-01

    This handbook presents high quality reliability data for offshore equipment collected during phase VI to IX (project period 2000 – 2009) of the OREDA project. The intention of the handbook is to provide both quantitative and qualitative information as a basis for Performance Forecasting or RAMS (Reliability, Availability, Maintainability and Safety) analyses. Volume 1 is about Topside Equipment. Compared to earlier editions, there are only minor changes in the reliability data presentation. To obtain a reasonable population for presenting reliability data for topside equipment in the 2015 edition, some data from phases VI and VII already issued in the previous 2009 handbook (5th edition) have also been included. The 2015 topside volume is divided into two parts. Part I describes the OREDA project, different data collection phases and the estimation procedures used to generate the data tables presented in Part II of the handbook. Topside data are in general not covering the whole lifetime of equipment, but ...

  5. Reliability Analysis of Radioamateur Communication

    Directory of Open Access Journals (Sweden)

    Wawer Tomasz

    2016-07-01

    Full Text Available The following article describes diagnostic and reliability aspects of amateur radio communications. The intention of precise measuring of quality and accuracy of every contact was present in ham radio from very beginning. The reports were sent and they are still used today, in many variants. In time, the tools to measure ionosphere state and propagation conditions emerged. They are fundamental for communication, especially long distance ones. The article concentrates on description of digital amateur mode, JT9. This mode is very effective, enables worldwide reach and requires simple tools.

  6. Modified personal interviews: resurrecting reliable personal interviews for admissions?

    Science.gov (United States)

    Hanson, Mark D; Kulasegaram, Kulamakan Mahan; Woods, Nicole N; Fechtig, Lindsey; Anderson, Geoff

    2012-10-01

    Traditional admissions personal interviews provide flexible faculty-student interactions but are plagued by low inter-interview reliability. Axelson and Kreiter (2009) retrospectively showed that multiple independent sampling (MIS) may improve reliability of personal interviews; thus, the authors incorporated MIS into the admissions process for medical students applying to the University of Toronto's Leadership Education and Development Program (LEAD). They examined the reliability and resource demands of this modified personal interview (MPI) format. In 2010-2011, LEAD candidates submitted written applications, which were used to screen for participation in the MPI process. Selected candidates completed four brief (10-12 minutes) independent MPIs each with a different interviewer. The authors blueprinted MPI questions to (i.e., aligned them with) leadership attributes, and interviewers assessed candidates' eligibility on a five-point Likert-type scale. The authors analyzed inter-interview reliability using the generalizability theory. Sixteen candidates submitted applications; 10 proceeded to the MPI stage. Reliability of the written application components was 0.75. The MPI process had overall inter-interview reliability of 0.79. Correlation between the written application and MPI scores was 0.49. A decision study showed acceptable reliability of 0.74 with only three MPIs scored using one global rating. Furthermore, a traditional admissions interview format would take 66% more time than the MPI format. The MPI format, used during the LEAD admissions process, achieved high reliability with minimal faculty resources. The MPI format's reliability and effective resource use were possible through MIS and employment of expert interviewers. MPIs may be useful for other admissions tasks.

  7. Reliability Modeling of Microelectromechanical Systems Using Neural Networks

    Science.gov (United States)

    Perera. J. Sebastian

    2000-01-01

    Microelectromechanical systems (MEMS) are a broad and rapidly expanding field that is currently receiving a great deal of attention because of the potential to significantly improve the ability to sense, analyze, and control a variety of processes, such as heating and ventilation systems, automobiles, medicine, aeronautical flight, military surveillance, weather forecasting, and space exploration. MEMS are very small and are a blend of electrical and mechanical components, with electrical and mechanical systems on one chip. This research establishes reliability estimation and prediction for MEMS devices at the conceptual design phase using neural networks. At the conceptual design phase, before devices are built and tested, traditional methods of quantifying reliability are inadequate because the device is not in existence and cannot be tested to establish the reliability distributions. A novel approach using neural networks is created to predict the overall reliability of a MEMS device based on its components and each component's attributes. The methodology begins with collecting attribute data (fabrication process, physical specifications, operating environment, property characteristics, packaging, etc.) and reliability data for many types of microengines. The data are partitioned into training data (the majority) and validation data (the remainder). A neural network is applied to the training data (both attribute and reliability); the attributes become the system inputs and reliability data (cycles to failure), the system output. After the neural network is trained with sufficient data. the validation data are used to verify the neural networks provided accurate reliability estimates. Now, the reliability of a new proposed MEMS device can be estimated by using the appropriate trained neural networks developed in this work.

  8. Learn Objective-C on the Mac for OS X and iOS

    CERN Document Server

    Knaster, Scott; Malik, Waqar

    2012-01-01

    Learn to write apps for some of today's hottest technologies, including the iPhone and iPad (using iOS), as well as the Mac (using OS X). It starts with Objective-C, the base language on which the native iOS software development kit (SDK) and the OS X are based. Learn Objective-C on the Mac: For OS X and iOS, Second Edition updates a best selling book and is an extensive, newly updated guide to Objective-C. Objective-C is a powerful, object-oriented extension of C, making this update the perfect follow-up to Dave Mark's bestselling Learn C on the Mac. Whether you're an experienced C programmer

  9. Reliability of Power Electronic Converter Systems

    DEFF Research Database (Denmark)

    for advancing the reliability, availability, system robustness, and maintainability of PECS at different levels of complexity. Drawing on the experience of an international team of experts, this book explores the reliability of PECS covering topics including an introduction to reliability engineering in power......-tolerant adjustable speed drive systems; mission profile oriented reliability design in wind turbine and photovoltaic systems; reliability of power conversion systems in photovoltaic applications; power supplies for computers; and high-power converters. Reliability of Power Electronic Converter Systems is essential...... reading for researchers, professionals and students working with power electronics and their applications, particularly those specializing in the development and application of power electronic converters and systems....

  10. Reliability Studies in the Real World

    Science.gov (United States)

    Roesch, William J.

    This chapter is intended to give a nontraditional look at reliability of compound semiconductors. It is a review of the five main stages of reliability analysis. Although essential, the first three stages are separated as those traditional tests which are particularly applicable for process development and material selection phases. The remaining two reliability stages are the focus of real life. These later stages are the tools used for improving reliability of established processes and families of products where significant changes and switches to new materials are not feasible. While all five steps are necessary in reliability studies, the methods of establishing and improving reliability are different.

  11. The geological record of base metal sulfides in the cratonic mantle: A microscale 187Os/188Os study of peridotite xenoliths from Somerset Island, Rae Craton (Canada)

    Science.gov (United States)

    Bragagni, A.; Luguet, A.; Fonseca, R. O. C.; Pearson, D. G.; Lorand, J.-P.; Nowell, G. M.; Kjarsgaard, B. A.

    2017-11-01

    We report detailed petrographic investigations along with 187Os/188Os data in Base Metal Sulfide (BMS) on four cratonic mantle xenoliths from Somerset Island (Rae Craton, Canada). The results shed light on the processes affecting the Re-Os systematics and provide time constraints on the formation and evolution of the cratonic lithospheric mantle beneath the Rae craton. When devoid of alteration, BMS grains mainly consist of pentlandite + pyrrhotite ± chalcopyrite. The relatively high BMS modal abundance of the four investigated xenoliths cannot be reconciled with the residual nature of these peridotites, but requires addition of metasomatic BMS. This is especially evident in the two peridotites with the highest bulk Pd/Ir and Pd/Pt. Metasomatic BMS likely formed during melt/fluid percolation in the Sub Continental Lithospheric Mantle (SCLM) as well as during infiltration of the host kimberlite magma, when djerfisherite crystallized around older Fe-Ni-sulfides. On the whole-rock scale, kimberlite metasomatism is visible in a subset of bulk xenoliths, which defines a Re-Os errorchron that dates the host magma emplacement. The 187Os/188Os measured in the twenty analysed BMS grains vary from 0.1084 to >0.17 and it shows no systematic variation depending on the sulfide mineralogical assemblage. The largest range in 187Os/188Os is observed in BMS grains from the two xenoliths with the highest Pd/Ir, Pd/Pt, and sulfide modal abundance. The whole-rock TRD ages of these two samples underestimate the melting age obtained from BMS, demonstrating that bulk Re-Os model ages from peridotites with clear evidence of metasomatism should be treated with caution. The TRD ages determined in BMS grains are clustered around 2.8-2.7, ∼2.2 and ∼1.9 Ga. The 2.8-2.7 Ga TRD ages document the main SCLM building event in the Rae craton, which is likely related to the formation of the local greenstone belts in a continental rift setting. The Paleoproterozoic TRD ages can be explained by

  12. Sampling for assurance of future reliability

    Science.gov (United States)

    Klauenberg, Katy; Elster, Clemens

    2017-02-01

    Ensuring measurement trueness, compliance with regulations and conformity with standards are key tasks in metrology which are often considered at the time of an inspection. Current practice does not always verify quality after or between inspections, calibrations, laboratory comparisons, conformity assessments, etc. Statistical models describing behavior over time may ensure reliability, i.e. they may give the probability of functioning, compliance or survival until some future point in time. It may not always be possible or economic to inspect a whole population of measuring devices or other units. Selecting a subset of the population according to statistical sampling plans and inspecting only these, allows conclusions about the quality of the whole population with a certain confidence. Combining these issues of sampling and aging, raises questions such as: How many devices need to be inspected, and at least how many of them must conform, so that one can be sure, that more than 100p % of the population will comply until the next inspection? This research is to raise awareness and offer a simple answer to such time- and sample-based quality statements in metrology and beyond. Reliability demonstration methods, such as the prevailing Weibull binomial model, quantify the confidence in future reliability on the basis of a sample. We adapt the binomial model to be applicable to sampling without replacement and simplify the Weibull model so that sampling plans may be determined on the basis of existing ISO standards. Provided the model is suitable, no additional information and no software are needed; and yet, the consumer is protected against future failure. We establish new sampling plans for utility meter surveillance, which are required by a recent modification of German law. These sampling plans are given in similar tables to the previous ones, which demonstrates their suitability for everyday use.

  13. LA CONCHA EN LA CULTURA BOLAÑOS (Shell in the Bolaños Culture

    Directory of Open Access Journals (Sweden)

    María Teresa Cabrero G.

    2014-06-01

    Full Text Available El trabajo de concha en la cultura Bolaños propició su desarrollo económico y el fortalecimiento de la ruta de intercambio comercial para proveerse de mercancías tanto de subsistencia como de estatus. Permitió reafirmar las relaciones sociales, económicas y aún las ideológicas con los pueblos que los rodeaban. El transporte de conchas y caracoles desde los pueblos costeros sería a través de las caravanas que atravesaban la región; el poco peso y volumen facilitó la adquisición de una gran variedad de pelecípedos y gasterópodos con los que elaboraron objetos de alta calidad. Se utilizaron como adornos corporales y simbólicos en las localidades principales de la región; además representaron una fuente económica a través del intercambio con los pueblos vecinos. ENGLISH: The shell work of the Bolaños culture boosted its economic development and strengthened commercial trade routes providing both subsistence and high status goods. This trade allowed the reaffirming of social, economic and ideological ties with the towns around them. The caravans that crossed the region transported shells and conchs from the coastal towns. The low weight and volume facilitated the acquisition of a great variety of pelecypods and gastropods that were used to produce high-quality objects. These shells were used as body and symbolic ornaments in the main localities of the region; they also represented an economic resource through the exchange with neighboring towns.

  14. Deseabilidad social en niños y adultos puertorriqueños

    OpenAIRE

    José Luis Porrata

    1995-01-01

    En este estudio se examinan las puntuaciones en deseabilidad social de niños y adultos puertorriqueños. Deseabilidad social es la tendencia a contestar en formas socialmente deseables. Cuando los ciudadanos de un país obtienen puntuaciones altas en deseabilidad social se interpreta como una tendencia a conformar en esa sociedad. Al comparar las puntuaciones en deseabilidad social entre puertorriqueños y británicos, los puertorriqueños puntúan más alto que sus contraparte bri...

  15. What HERA May Provide?

    Energy Technology Data Exchange (ETDEWEB)

    Jung, Hannes; /DESY; De Roeck, Albert; /CERN; Bartels, Jochen; /Hamburg U., Inst. Theor. Phys. II; Behnke, Olaf; Blumlein, Johannes; /DESY; Brodsky, Stanley; /SLAC /Durham U., IPPP; Cooper-Sarkar, Amanda; /Oxford U.; Deak, Michal; /DESY; Devenish, Robin; /Oxford U.; Diehl, Markus; /DESY; Gehrmann, Thomas; /Zurich U.; Grindhammer, Guenter; /Munich, Max Planck Inst.; Gustafson, Gosta; /CERN /Lund U., Dept. Theor. Phys.; Khoze, Valery; /Durham U., IPPP; Knutsson, Albert; /DESY; Klein, Max; /Liverpool U.; Krauss, Frank; /Durham U., IPPP; Kutak, Krzysztof; /DESY; Laenen, Eric; /NIKHEF, Amsterdam; Lonnblad, Leif; /Lund U., Dept. Theor. Phys.; Motyka, Leszek; /Hamburg U., Inst. Theor. Phys. II /Birmingham U. /Southern Methodist U. /DESY /Piemonte Orientale U., Novara /CERN /Paris, LPTHE /Hamburg U. /Penn State U.

    2011-11-10

    More than 100 people participated in a discussion session at the DIS08 workshop on the topic What HERA may provide. A summary of the discussion with a structured outlook and list of desirable measurements and theory calculations is given. The HERA accelerator and the HERA experiments H1, HERMES and ZEUS stopped running in the end of June 2007. This was after 15 years of very successful operation since the first collisions in 1992. A total luminosity of {approx} 500 pb{sup -1} has been accumulated by each of the collider experiments H1 and ZEUS. During the years the increasingly better understood and upgraded detectors and HERA accelerator have contributed significantly to this success. The physics program remains in full swing and plenty of new results were presented at DIS08 which are approaching the anticipated final precision, fulfilling and exceeding the physics plans and the previsions of the upgrade program. Most of the analyses presented at DIS08 were still based on the so called HERA I data sample, i.e. data taken until 2000, before the shutdown for the luminosity upgrade. This sample has an integrated luminosity of {approx} 100 pb{sup -1}, and the four times larger statistics sample from HERA II is still in the process of being analyzed.

  16. Reliability of steam generator tubing

    Energy Technology Data Exchange (ETDEWEB)

    Kadokami, E. [Mitsubishi Heavy Industries Ltd., Hyogo-ku (Japan)

    1997-02-01

    The author presents results on studies made of the reliability of steam generator (SG) tubing. The basis for this work is that in Japan the issue of defects in SG tubing is addressed by the approach that any detected defect should be repaired, either by plugging the tube or sleeving it. However, this leaves open the issue that there is a detection limit in practice, and what is the effect of nondetectable cracks on the performance of tubing. These studies were commissioned to look at the safety issues involved in degraded SG tubing. The program has looked at a number of different issues. First was an assessment of the penetration and opening behavior of tube flaws due to internal pressure in the tubing. They have studied: penetration behavior of the tube flaws; primary water leakage from through-wall flaws; opening behavior of through-wall flaws. In addition they have looked at the question of the reliability of tubing with flaws during normal plant operation. Also there have been studies done on the consequences of tube rupture accidents on the integrity of neighboring tubes.

  17. 76 FR 23222 - Electric Reliability Organization Interpretation of Transmission Operations Reliability

    Science.gov (United States)

    2011-04-26

    ... Energy Regulatory Commission 18 CFR Part 40 Electric Reliability Organization Interpretation of Transmission Operations Reliability AGENCY: Federal Energy Regulatory Commission. ACTION: Notice of Proposed... Commission (Commission) proposes to approve the North American Electric Reliability Corporation's (NERC's...

  18. Dissecting the Re-Os molybdenite geochronometer.

    Science.gov (United States)

    Barra, Fernando; Deditius, Artur; Reich, Martin; Kilburn, Matt R; Guagliardo, Paul; Roberts, Malcolm P

    2017-11-22

    Rhenium and osmium isotopes have been used for decades to date the formation of molybdenite (MoS2), a common mineral in ore deposits and the world's main source of molybdenum and rhenium. Understanding the distribution of parent 187Re and radiogenic daughter 187Os isotopes in molybdenite is critical in interpreting isotopic measurements because it can compromise the accurate determination and interpretation of mineralization ages. In order to resolve the controls on the distribution of these elements, chemical and isotope mapping of MoS2 grains from representative porphyry copper-molybdenum deposits were performed using electron microprobe and nano-scale secondary ion mass spectrometry. Our results show a heterogeneous distribution of 185,187Re and 192Os isotopes in MoS2, and that both 187Re and 187Os isotopes are not decoupled as previously thought. We conclude that Re and Os are structurally bound or present as nanoparticles in or next to molybdenite grains, recording a complex formation history and hindering the use of microbeam techniques for Re-Os molybdenite dating. Our study opens new avenues to explore the effects of isotope nuggeting in geochronometers.

  19. Normative, reliability, and validity data

    Directory of Open Access Journals (Sweden)

    Mateu Servera

    2006-01-01

    Full Text Available La atención sostenida ha demostrado estar relacionada con diferentes problemas clínicos, tales como el trastorno por déficit de atención e hiperactividad (TDAH y los trastornos de aprendizaje. La atención sostenida puede estudiarse desde dos paradigmas relacionados pero independientes representados por los tests de ejecución continua (CPT y las tareas de vigilancia. La Tarea de Atención Sostenida en la Infancia (CSAT es una tarea de vigilancia. El propósito de este estudio instrumental es analizar algunas de sus propiedades psicométricas, relacionadas con la estandarización, fiabilidad y validez de constructo. La CSAT se administró a una muestra de 584 niños de entre 6 y 11 años, que fueron clasificados en cuatro grupos de edad. Las variables dependientes fueron el rendimiento académico y las medidas de inatención y sobreactividad de la Edelbrock’s Child Attention Problems Scale. Los resultados muestran que con la edad mejoran todas las puntuaciones de la CSAT, sin que se observen diferencias por género. La fiabilidad test-retest fluctuó entre 0,59 y 0,88. Las medidas de la CSAT (especialmente los aciertos, d’ y A’, tal y como se hipotetizó, mostraron más implicaciones con la inatención y el rendimiento que con la sobreactividad. En resumen, la CSAT ha demostrado buenos índices psicométricos y se propone su utilización en futuros estudios clínicos o aplicados.

  20. DOE Nuclear Weapon Reliability Definition: History, Description, and Implementation

    Energy Technology Data Exchange (ETDEWEB)

    Wright, D.L.; Cashen, J.J.; Sjulin, J.M.; Bierbaum, R.L.; Kerschen, T.J.

    1999-04-01

    The overarching goal of the Department of Energy (DOE) nuclear weapon reliability assessment process is to provide a quantitative metric that reflects the ability of the weapons to perform their intended function successfully. This white paper is intended to provide insight into the current and long-standing DOE definition of nuclear weapon reliability, which can be summarized as: The probability of achieving the specified yield, at the target, across the Stockpile-To-Target Sequence of environments, throughout the weapon's lifetime, assuming proper inputs.

  1. Human Reliability Analysis for Digital Human-Machine Interfaces

    Energy Technology Data Exchange (ETDEWEB)

    Ronald L. Boring

    2014-06-01

    This paper addresses the fact that existing human reliability analysis (HRA) methods do not provide guidance on digital human-machine interfaces (HMIs). Digital HMIs are becoming ubiquitous in nuclear power operations, whether through control room modernization or new-build control rooms. Legacy analog technologies like instrumentation and control (I&C) systems are costly to support, and vendors no longer develop or support analog technology, which is considered technologically obsolete. Yet, despite the inevitability of digital HMI, no current HRA method provides guidance on how to treat human reliability considerations for digital technologies.

  2. Software Architecture Reliability Analysis using Failure Scenarios

    NARCIS (Netherlands)

    Tekinerdogan, B.; Sözer, Hasan; Aksit, Mehmet

    With the increasing size and complexity of software in embedded systems, software has now become a primary threat for the reliability. Several mature conventional reliability engineering techniques exist in literature but traditionally these have primarily addressed failures in hardware components

  3. Reliability of buildings with internal network

    Directory of Open Access Journals (Sweden)

    Dolganov Andrey

    2016-01-01

    Full Text Available During the course of performance, reliability of a building with internal network located in Western Administrative District of Moscow was examined and estimated. Reliability means probability of no failure in the initial time.

  4. Analog IC reliability in nanometer CMOS

    CERN Document Server

    Maricau, Elie

    2013-01-01

    This book focuses on modeling, simulation and analysis of analog circuit aging. First, all important nanometer CMOS physical effects resulting in circuit unreliability are reviewed. Then, transistor aging compact models for circuit simulation are discussed and several methods for efficient circuit reliability simulation are explained and compared. Ultimately, the impact of transistor aging on analog circuits is studied. Aging-resilient and aging-immune circuits are identified and the impact of technology scaling is discussed.   The models and simulation techniques described in the book are intended as an aid for device engineers, circuit designers and the EDA community to understand and to mitigate the impact of aging effects on nanometer CMOS ICs.   ·         Enables readers to understand long-term reliability of an integrated circuit; ·         Reviews CMOS unreliability effects, with focus on those that will emerge in future CMOS nodes; ·         Provides overview of models for...

  5. Real Time Grid Reliability Management 2005

    Energy Technology Data Exchange (ETDEWEB)

    Eto, Joe; Eto, Joe; Lesieutre, Bernard; Lewis, Nancy Jo; Parashar, Manu

    2008-07-07

    The increased need to manage California?s electricity grid in real time is a result of the ongoing transition from a system operated by vertically-integrated utilities serving native loads to one operated by an independent system operator supporting competitive energy markets. During this transition period, the traditional approach to reliability management -- construction of new transmission lines -- has not been pursued due to unresolved issues related to the financing and recovery of transmission project costs. In the absence of investments in new transmission infrastructure, the best strategy for managing reliability is to equip system operators with better real-time information about actual operating margins so that they can better understand and manage the risk of operating closer to the edge. A companion strategy is to address known deficiencies in offline modeling tools that are needed to ground the use of improved real-time tools. This project: (1) developed and conducted first-ever demonstrations of two prototype real-time software tools for voltage security assessment and phasor monitoring; and (2) prepared a scoping study on improving load and generator response models. Additional funding through two separate subsequent work authorizations has already been provided to build upon the work initiated in this project.

  6. Interrater reliability of diastasis recti abdominis measurement.

    Science.gov (United States)

    Bursch, S G

    1987-07-01

    Diastasis recti abdominis, or midline separation of the abdominal musculature, has not been investigated scientifically. The purposes of this study were to provide data on the incidence and degree of diastasis recti abdominis, to describe the measurement system used, and to determine the interrater reliability of the measurements performed. Forty subjects less than four days postpartum were tested by four raters. All subjects were measured in a supine, flexed-knee position at a standard point of palpation above the umbilicus. During palpation, each subject performed a partial sit-up, and the rater determined the number of finger widths filling the separation. An analysis of variance for repeated measures revealed a highly significant difference between the measurement scores of the four raters. This measurement system, therefore, was found to be unreliable. All subjects had some degree of diastasis recti abdominis; over 60% had separations significant enough to warrant protective exercises. The author proposes that the incidence and degree of diastasis recti abdominis may be underestimated, that selected components of exercise prescriptions may be contraindicated, and that a reliable instrument for measuring the degree of separation is needed.

  7. Lead free solder mechanics and reliability

    CERN Document Server

    Pang, John Hock Lye

    2012-01-01

    Lead-free solders are used extensively as interconnection materials in electronic assemblies and play a critical role in the global semiconductor packaging and electronics manufacturing industry. Electronic products such as smart phones, notebooks and high performance computers rely on lead-free solder joints to connect IC chip components to printed circuit boards. Lead Free Solder: Mechanics and Reliability provides in-depth design knowledge on lead-free solder elastic-plastic-creep and strain-rate dependent deformation behavior and its application in failure assessment of solder joint reliability. It includes coverage of advanced mechanics of materials theory and experiments, mechanical properties of solder and solder joint specimens, constitutive models for solder deformation behavior; numerical modeling and simulation of solder joint failure subject to thermal cycling, mechanical bending fatigue, vibration fatigue and board-level drop impact tests. This book also: Discusses the mechanical prope...

  8. OS X Mountain Lion Portable Genius

    CERN Document Server

    Spivey, Dwight

    2012-01-01

    Essential tips and techniques on the Mac OS X features you use most! If you want the kind of hip, friendly help you'd get from friends on how to get the most of out of Mac OS X Mountain Lion, this is the guide you need. Jump right into the coolest new Mac OS X features like Game Center, Messages, and Notification, or get a better handle on the basic tools and shortcuts that will help keep your mountain cat purring. From customizing to using multimedia to syncing your Mac to other devices, this book saves you time and hassle, avoids fluff, and covers what you want to know most. New addition t

  9. iOS app development portable genius

    CERN Document Server

    Wentk, Richard

    2012-01-01

    The essential skills and technologies needed for iOS development in one handy guide! The unprecedented popularity of iOS devices, such as the iPhone, iPad, and iPod touch, has led to a development boom. If you’re eager to become part of the action, then this is the book for you! Packed with must-have information on iOS development, this handy guide covers Objective-C, Xcode, Frameworks, and sound design principles and explains how to upload an app to the app store and integrate apps with the latest advances that Apple offers developers. The featured tips and tricks will get you up and ru

  10. Niños y Violencia

    OpenAIRE

    International Child Development Centre

    1997-01-01

    Este Innocenti Digest explora la violencia de los niños y hacia los niños, usando el marco de la Convención de los Derechos del Niño de las Naciones Unidas. Se centra en la violencia interpersonal, tanto intrafamiliar como extrafamiliar. Se incluye el abuso sexual y la explotación ya que a pesar de no implicar obligatoriamente violencia o coerción, la mayor parte de la evidencia demuestra su efectos dañinos tanto físicos como psicológicos. También se discute la implicación de los niños en los...

  11. Learn Mac OS X Snow Leopard

    CERN Document Server

    Meyers, Scott

    2009-01-01

    You're smart and savvy, but also busy. This comprehensive guide to Apple's Mac OS X 10.6, Snow Leopard, gives you everything you need to know to live a happy, productive Mac life. Learn Mac OS X Snow Leopard will have you up and connected lickity split. With a minimum of overhead and a maximum of useful information, you'll cover a lot of ground in the time it takes other books to get you plugged in. If this isn't your first experience with Mac OS X, skip right to the "What's New in Snow Leopard" sections. You may also find yourself using this book as a quick refresher course or a way

  12. Demand Response as a System Reliability Resource

    Energy Technology Data Exchange (ETDEWEB)

    Eto, Joseph H. [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Environmental Energy Technologies Division; Lewis, Nancy Jo [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Environmental Energy Technologies Division; Watson, David [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Environmental Energy Technologies Division; Kiliccote, Sila [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Environmental Energy Technologies Division; Auslander, David [Univ. of California, Berkeley, CA (United States); Paprotny, Igor [Univ. of California, Berkeley, CA (United States); Makarov, Yuri [Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

    2012-12-31

    The Demand Response as a System Reliability Resource project consists of six technical tasks: • Task 2.1. Test Plan and Conduct Tests: Contingency Reserves Demand Response (DR) Demonstration—a pioneering demonstration of how existing utility load-management assets can provide an important electricity system reliability resource known as contingency reserve. • Task 2.2. Participation in Electric Power Research Institute (EPRI) IntelliGrid—technical assistance to the EPRI IntelliGrid team in developing use cases and other high-level requirements for the architecture. • Task 2.3. Research, Development, and Demonstration (RD&D) Planning for Demand Response Technology Development—technical support to the Public Interest Energy Research (PIER) Program on five topics: Sub-task 1. PIER Smart Grid RD&D Planning Document; Sub-task 2. System Dynamics of Programmable Controllable Thermostats; Sub-task 3. California Independent System Operator (California ISO) DR Use Cases; Sub-task 4. California ISO Telemetry Requirements; and Sub-task 5. Design of a Building Load Data Storage Platform. • Task 2.4. Time Value of Demand Response—research that will enable California ISO to take better account of the speed of the resources that it deploys to ensure compliance with reliability rules for frequency control. • Task 2.5. System Integration and Market Research: Southern California Edison (SCE)—research and technical support for efforts led by SCE to conduct demand response pilot demonstrations to provide a contingency reserve service (known as non-spinning reserve) through a targeted sub-population of aggregated residential and small commercial customers enrolled in SCE’s traditional air conditioning (AC) load cycling program, the Summer Discount Plan. • Task 2.6. Demonstrate Demand Response Technologies: Pacific Gas and Electric (PG&E)—research and technical support for efforts led by PG&E to conduct a demand response pilot demonstration to provide non

  13. URREF Reliability Versus Credibility in Information Fusion

    Science.gov (United States)

    2013-07-01

    Support,” Proc. SPIE 8050, 2011. [54] Linkov I, Welle P, Loney D, Tkachuk A, Canis L, Kim JB, Bridges T., “Use of multicriteria decision analysis to...categories of reliability and credibility. Reliability has traditionally been assessed for physical machines to support failure analysis . Source reliability...discussions, we detail an analysis of credibility and reliability. Information fusion consumers comprise users and machines of which the man-machine

  14. Analyzing Reliability Change in Legal Case

    OpenAIRE

    Jirakunkanok, Pimolluck; Sano, Katsuhiko; Tojo, Satoshi

    2015-01-01

    A consideration of the reliability plays a significant role in agent communication. An agent can change her belief about the reliability ordering between the other agents with respect to new incoming information. In order to analyze reliability change of an agent, this paper proposes a logical formalization with two dynamic operators, i.e., downgrade and upgrade operators. The downgrade operator allows an agent to downgrade some specified agents to be less reliable corresponding to the degree...

  15. Test Reliability at the Individual Level

    OpenAIRE

    Hu, Yueqin; Nesselroade, John R.; Erbacher, Monica K.; Boker, Steven M.; Burt, S. Alexandra; Keel, Pamela K.; Neale, Michael C.; Sisk, Cheryl L.; Klump, Kelly

    2016-01-01

    Reliability has a long history as one of the key psychometric properties of a test. However, a given test might not measure people equally reliably. Test scores from some individuals may have considerably greater error than others. This study proposed two approaches using intraindividual variation to estimate test reliability for each person. A simulation study suggested that the parallel tests approach and the structural equation modeling approach recovered the simulated reliability coeffici...

  16. 78 FR 30804 - Transmission Planning Reliability Standards

    Science.gov (United States)

    2013-05-23

    ... Federal Energy Regulatory Commission 18 CFR Part 40 Transmission Planning Reliability Standards AGENCY... Organization.\\1\\ Proposed Transmission Planning (TPL) Reliability Standard TPL-001-2 includes a provision that... vague and unenforceable. \\1\\ Transmission Planning Reliability Standards, Notice of Proposed Rulemaking...

  17. Optimal, Reliability-Based Code Calibration

    DEFF Research Database (Denmark)

    Sørensen, John Dalsgaard

    2002-01-01

    Reliability based code calibration is considered in this paper. It is described how the results of FORM based reliability analysis may be related to the partial safety factors and characteristic values. The code calibration problem is presented in a decision theoretical form and it is discussed how...... of reliability based code calibration of LRFD based design codes....

  18. 2015 NREL Photovoltaic Module Reliability Workshops

    Energy Technology Data Exchange (ETDEWEB)

    Kurtz, Sarah [National Renewable Energy Laboratory (NREL), Golden, CO (United States)

    2017-09-14

    NREL's Photovoltaic (PV) Module Reliability Workshop (PVMRW) brings together PV reliability experts to share information, leading to the improvement of PV module reliability. Such improvement reduces the cost of solar electricity and promotes investor confidence in the technology--both critical goals for moving PV technologies deeper into the electricity marketplace.

  19. 2016 NREL Photovoltaic Module Reliability Workshop

    Energy Technology Data Exchange (ETDEWEB)

    Kurtz, Sarah [National Renewable Energy Laboratory (NREL), Golden, CO (United States)

    2017-09-07

    NREL's Photovoltaic (PV) Module Reliability Workshop (PVMRW) brings together PV reliability experts to share information, leading to the improvement of PV module reliability. Such improvement reduces the cost of solar electricity and promotes investor confidence in the technology - both critical goals for moving PV technologies deeper into the electricity marketplace.

  20. Software reliability: Failures, consequences and improvement ...

    African Journals Online (AJOL)

    Software reliability is one of a number of aspects of computer software which can be taken into consideration when determining the quality of the software. Software reliability is an important factor affecting system performance. It differs from hardware reliability in that it reflects the design perfection rather than manufacturing ...

  1. 46 CFR 169.619 - Reliability.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Reliability. 169.619 Section 169.619 Shipping COAST... Electrical Steering Systems § 169.619 Reliability. (a) Except where the OCMI judges it impracticable, the... be below that necessary for the safe navigation of the vessel. (c) The strength and reliability of...

  2. Integration of reliability and tolerance effect analysis

    NARCIS (Netherlands)

    Brombacher, A.C.; de Boer, H.A.; van 't Loo, J.

    1989-01-01

    The authors focus on the development of systems with online optimized reliability. They argue that in the case of online analysis, reliability analysis should have the same importance as functional analysis currently has, and that reliability should be integrated in a design. Further the function of

  3. Conceptions of reliability revisited and practical recommendations

    NARCIS (Netherlands)

    Sijtsma, K.; van der Ark, L.A.

    2015-01-01

    We discuss reliability definitions from the perspectives of classical test theory, factor analysis, and generalizability theory. For each method, we discuss the rationale, the estimation of reliability, and the goodness of fit of the model that defines the reliability coefficient to the data.

  4. software reliability: failures, consequences and improvement

    African Journals Online (AJOL)

    BARTH EKWUEME

    2009-07-16

    Jul 16, 2009 ... Software reliability is one of a number of aspects of computer software which can be taken into consideration when determining the quality of the software. Software reliability is an important factor affecting system performance. It differs from hardware reliability in that it reflects the design perfection rather ...

  5. Space transportation main engine reliability and safety

    Science.gov (United States)

    Monk, Jan C.

    1991-01-01

    Viewgraphs are used to illustrate the reliability engineering and aerospace safety of the Space Transportation Main Engine (STME). A technology developed is called Total Quality Management (TQM). The goal is to develop a robust design. Reducing process variability produces a product with improved reliability and safety. Some engine system design characteristics are identified which improves reliability.

  6. Monitoring Travel Time Reliability on Freeways

    NARCIS (Netherlands)

    Tu, Huizhao

    2008-01-01

    Travel time and travel time reliability are important attributes of a trip. The current measures of reliability have in common that in general they all relate to the variability of travel times. However, travel time reliability does not only rely on variability but also on the stability of travel

  7. Avanços recentes em psicobiologia

    Directory of Open Access Journals (Sweden)

    Maria Teresa Araujo Silva

    Full Text Available Três assuntos, representando diferentes níveis de abordagem da relação entre o fato psicológico e o fato biológico, são discutidos. Os estudos apresentados são avanços na compreensão dos mecanismos subjacentes ao comportamento, abordando a base molecular da dor, o mecanismo de processos comportamentais simples a nível celular, e o problema psicossomático a nível do organismo como um todo.

  8. Professional iOS database application programming

    CERN Document Server

    Alessi, Patrick

    2013-01-01

    Updated and revised coverage that includes the latest versions of iOS and Xcode Whether you're a novice or experienced developer, you will want to dive into this updated resource on database application programming for the iPhone and iPad. Packed with more than 50 percent new and revised material - including completely rebuilt code, screenshots, and full coverage of new features pertaining to database programming and enterprise integration in iOS 6 - this must-have book intends to continue the precedent set by the previous edition by helping thousands of developers master database

  9. Improved Availability Processes from Reliability

    Directory of Open Access Journals (Sweden)

    Henrry Ricardo-Cabrera

    2015-12-01

    Full Text Available This research was conducted in the industry, “Cementos Cienfuegos S.A.”, its main objective was to implement a method for improving the technical availability of the production processes. The method described uses classical analytical systems as a tool to improve the work of the operators of industrial facilities using checklists developed from the identification of the contribution of the unavailability of equipment to the failure of the technological system. Examples of application are the results in the cement technology systems, made on the basis of the reliability of the components of technological systems, specifically the process of raw materials. As a result of improvements in technical implementation process availability are obtained and, therefore, an increasing efficiency. The extension of this work can ensure the improvement of the general availability of the industry.

  10. Improving the Reliability of IPM

    CERN Document Server

    Giacomini, T

    2005-01-01

    IPMs measure in a non-destructive way the profile of ion beams independent whether the beam is bunched or not. Our application is the heavy ion synchrotron SIS, which can accelerate ions with a large variety of different masses and charges. The IPM is used to obtain information about the beam matching, the electron cooling and to support for any kind of machine experiments. To ensure reliable function and to increase the data accuracy we executed some important mechanical improvements. The resistive e-field plates were replaced by discrete electrodes. We designed a new MCP-Phosphor-screen assembly of rectangular shape and large active area and in addition a module with a filament mounted in meander shape to monitor the degradation of the MCPs. The whole device was planned with respect of high field uniformity and small mechanical dimensions at a large clearance for the beam.

  11. Reliability on ISS Talk Outline

    Science.gov (United States)

    Misiora, Mike

    2015-01-01

    1. Overview of ISS 2. Space Environment and it effects a. Radiation b. Microgravity 3. How we ensure reliability a. Requirements b. Component Selection i. Note: I plan to stay away from talk about Rad Hardened components and talk about why we use older processors because they are less susceptible to SEUs. c. Testing d. Redundancy / Failure Tolerance e. Sparing strategies 4. Operational Examples a. Multiple MDM Failures on 6A due to hard drive failure In general, my plan is to only talk about data that is currently available via normal internet sources to ensure that I stay away from any topics that would be Export Controlled, ITAR, or NDA-controlled. The operational example has been well-reported on in the media and those are the details that I plan to cover. Additionally I am not planning on using any slides or showing any photos during the talk.

  12. System Reliability of Timber Structures

    DEFF Research Database (Denmark)

    Kirkegaard, Poul Henning; Sørensen, John Dalsgaard

    2010-01-01

    For reduction of the risk of collapse in the event of loss of structural element(s), a structural engineer may take necessary steps to design a collapse-resistant structure that is insensitive to accidental circumstances e.g. by incorporating characteristics like redundancy, ties, ductility, key...... elements, alternate load path(s) etc. in the structural design. In general these characteristics can have a positive influence on system reliability of a structure however, in Eurocodes ductility is only awarded for concrete and steel structures but not for timber structures. It is well......-know that structural systems can redistribute internal forces due to ductility of a connection, i.e. some additional loads can be carried by the structure. The same effect is also possible for reinforced concrete structures and structures of steel. However, for timber structures codes do not award that ductility...

  13. Reliability of three dental radiometers.

    Science.gov (United States)

    Hansen, E K; Asmussen, E

    1993-04-01

    The light intensity from 80 different curing units was recorded on three dental radiometers. Even though the correlation between the recordings obtained with the three testers was rather high, some units were categorized as good units by one radiometer and poor ones by another. It was also found that, in some case, there was a pronounced difference between the output within the same type of new units. Cavities were made in extracted third molars, filled with a microfilled resin, irradiated for 40 s with 20 of the curing units, and the depth of cure was measured. The radiometers were not able to rank the 20 units in accordance with their depth of cure. We conclude that the three radiometers are not fully reliable. However, they may become very useful tools for monitoring the output from a curing unit if the radiometer and the unit are calibrated.

  14. Os Órgãos de Soberania e a Defesa Nacional

    OpenAIRE

    Observatório de Relações Exteriores

    1998-01-01

    A política de Defesa Nacional é uma incumbência superior do Estado, a cargo dos seus mais elevados órgãos, pelos quais a Constituição distribui, de um modo equilibrado, as competências - é o principio da co-responsabilização dos órgãos de soberania.

  15. Neurology objective structured clinical examination reliability using generalizability theory.

    Science.gov (United States)

    Blood, Angela D; Park, Yoon Soo; Lukas, Rimas V; Brorson, James R

    2015-11-03

    This study examines factors affecting reliability, or consistency of assessment scores, from an objective structured clinical examination (OSCE) in neurology through generalizability theory (G theory). Data include assessments from a multistation OSCE taken by 194 medical students at the completion of a neurology clerkship. Facets evaluated in this study include cases, domains, and items. Domains refer to areas of skill (or constructs) that the OSCE measures. G theory is used to estimate variance components associated with each facet, derive reliability, and project the number of cases required to obtain a reliable (consistent, precise) score. Reliability using G theory is moderate (Φ coefficient = 0.61, G coefficient = 0.64). Performance is similar across cases but differs by the particular domain, such that the majority of variance is attributed to the domain. Projections in reliability estimates reveal that students need to participate in 3 OSCE cases in order to increase reliability beyond the 0.70 threshold. This novel use of G theory in evaluating an OSCE in neurology provides meaningful measurement characteristics of the assessment. Differing from prior work in other medical specialties, the cases students were randomly assigned did not influence their OSCE score; rather, scores varied in expected fashion by domain assessed. © 2015 American Academy of Neurology.

  16. A Passive System Reliability Analysis for a Station Blackout

    Energy Technology Data Exchange (ETDEWEB)

    Brunett, Acacia; Bucknor, Matthew; Grabaskas, David; Sofu, Tanju; Grelle, Austin

    2015-05-03

    The latest iterations of advanced reactor designs have included increased reliance on passive safety systems to maintain plant integrity during unplanned sequences. While these systems are advantageous in reducing the reliance on human intervention and availability of power, the phenomenological foundations on which these systems are built require a novel approach to a reliability assessment. Passive systems possess the unique ability to fail functionally without failing physically, a result of their explicit dependency on existing boundary conditions that drive their operating mode and capacity. Argonne National Laboratory is performing ongoing analyses that demonstrate various methodologies for the characterization of passive system reliability within a probabilistic framework. Two reliability analysis techniques are utilized in this work. The first approach, the Reliability Method for Passive Systems, provides a mechanistic technique employing deterministic models and conventional static event trees. The second approach, a simulation-based technique, utilizes discrete dynamic event trees to treat time- dependent phenomena during scenario evolution. For this demonstration analysis, both reliability assessment techniques are used to analyze an extended station blackout in a pool-type sodium fast reactor (SFR) coupled with a reactor cavity cooling system (RCCS). This work demonstrates the entire process of a passive system reliability analysis, including identification of important parameters and failure metrics, treatment of uncertainties and analysis of results.

  17. Reliability quantification and visualization for electric microgrids

    Science.gov (United States)

    Panwar, Mayank

    The electric grid in the United States is undergoing modernization from the state of an aging infrastructure of the past to a more robust and reliable power system of the future. The primary efforts in this direction have come from the federal government through the American Recovery and Reinvestment Act of 2009 (Recovery Act). This has provided the U.S. Department of Energy (DOE) with 4.5 billion to develop and implement programs through DOE's Office of Electricity Delivery and Energy Reliability (OE) over the a period of 5 years (2008-2012). This was initially a part of Title XIII of the Energy Independence and Security Act of 2007 (EISA) which was later modified by Recovery Act. As a part of DOE's Smart Grid Programs, Smart Grid Investment Grants (SGIG), and Smart Grid Demonstration Projects (SGDP) were developed as two of the largest programs with federal grants of 3.4 billion and $600 million respectively. The Renewable and Distributed Systems Integration (RDSI) demonstration projects were launched in 2008 with the aim of reducing peak electricity demand by 15 percent at distribution feeders. Nine such projects were competitively selected located around the nation. The City of Fort Collins in co-operative partnership with other federal and commercial entities was identified to research, develop and demonstrate a 3.5MW integrated mix of heterogeneous distributed energy resources (DER) to reduce peak load on two feeders by 20-30 percent. This project was called FortZED RDSI and provided an opportunity to demonstrate integrated operation of group of assets including demand response (DR), as a single controllable entity which is often called a microgrid. As per IEEE Standard 1547.4-2011 (IEEE Guide for Design, Operation, and Integration of Distributed Resource Island Systems with Electric Power Systems), a microgrid can be defined as an electric power system which has following characteristics: (1) DR and load are present, (2) has the ability to disconnect from

  18. Ultra-Reliable Communication in a Factory Environment for 5G Wireless Networks

    DEFF Research Database (Denmark)

    Singh, Bikramjit; Lee, Zexian; Tirkkonen, Olav

    2016-01-01

    The focus of this paper on mission-critical Communications in a 5G cellular communication system. Technologies to provide ultra-reliable communication, with 99:999 % availability in a factory environment are studied. We have analysed the feasibility requirements for ultra-reliable communication...... are compared. Last, the importance of multi-hop communication and multi-point coordination schemes are highlighted to improve the reliable communication in presence of interference and clutter. Keywords—5G; mission-critical communications; ultra-reliable communication; availability; reliability...

  19. Reliability Analysis of Random Vibration Transmission Path Systems

    Directory of Open Access Journals (Sweden)

    Wei Zhao

    2017-01-01

    Full Text Available The vibration transmission path systems are generally composed of the vibration source, the vibration transfer path, and the vibration receiving structure. The transfer path is the medium of the vibration transmission. Moreover, the randomness of transfer path influences the transfer reliability greatly. In this paper, based on the matrix calculus, the generalized second moment technique, and the stochastic finite element theory, the effective approach for the transfer reliability of vibration transfer path systems was provided. The transfer reliability of vibration transfer path system with uncertain path parameters including path mass and path stiffness was analyzed theoretically and computed numerically, and the correlated mathematical expressions were derived. Thus, it provides the theoretical foundation for the dynamic design of vibration systems in practical project, so that most random path parameters can be considered to solve the random problems for vibration transfer path systems, which can avoid the system resonance failure.

  20. Advanced Functionalities for Highly Reliable Optical Networks

    DEFF Research Database (Denmark)

    An, Yi

    interconnects and network-on-chips. A novel concept of all-optical protection switching scheme is proposed, where fault detection and protection trigger are all implemented in the optical domain. This scheme can provide ultra-fast establishment of the protection path resulting in a minimum loss of data......This thesis covers two research topics concerning optical solutions for networks e.g. avionic systems. One is to identify the applications for silicon photonic devices for cost-effective solutions in short-range optical networks. The other one is to realise advanced functionalities in order...... to increase the availability of highly reliable optical networks. A cost-effective transmitter based on a directly modulated laser (DML) using a silicon micro-ring resonator (MRR) to enhance its modulation speed is proposed, analysed and experimentally demonstrated. A modulation speed enhancement from 10 Gbit...

  1. Advancing Usability Evaluation through Human Reliability Analysis

    Energy Technology Data Exchange (ETDEWEB)

    Ronald L. Boring; David I. Gertman

    2005-07-01

    This paper introduces a novel augmentation to the current heuristic usability evaluation methodology. The SPAR-H human reliability analysis method was developed for categorizing human performance in nuclear power plants. Despite the specialized use of SPAR-H for safety critical scenarios, the method also holds promise for use in commercial off-the-shelf software usability evaluations. The SPAR-H method shares task analysis underpinnings with human-computer interaction, and it can be easily adapted to incorporate usability heuristics as performance shaping factors. By assigning probabilistic modifiers to heuristics, it is possible to arrive at the usability error probability (UEP). This UEP is not a literal probability of error but nonetheless provides a quantitative basis to heuristic evaluation. When combined with a consequence matrix for usability errors, this method affords ready prioritization of usability issues.

  2. SURE reliability analysis: Program and mathematics

    Science.gov (United States)

    Butler, Ricky W.; White, Allan L.

    1988-01-01

    The SURE program is a new reliability analysis tool for ultrareliable computer system architectures. The computational methods on which the program is based provide an efficient means for computing accurate upper and lower bounds for the death state probabilities of a large class of semi-Markov models. Once a semi-Markov model is described using a simple input language, the SURE program automatically computes the upper and lower bounds on the probability of system failure. A parameter of the model can be specified as a variable over a range of values directing the SURE program to perform a sensitivity analysis automatically. This feature, along with the speed of the program, makes it especially useful as a design tool.

  3. Saliva: a reliable sample matrix in bioanalytics.

    Science.gov (United States)

    Gröschl, Michael

    2017-04-01

    Saliva is gaining increasing attention as a bioanalytical sample matrix. Mostly because of the easy and noninvasive collection, it is not only beneficial in endocrinological and behavioral science, but also in pediatrics. Saliva also has the advantage of being the only body fluid which can be collected even during physical exercise, for example, during sportive activities, and there are physiological characteristics that make it superior to serum/plasma or urine for specific scientific questions. This review provides an insight into the physiology of saliva formation, explaining how certain compounds enter this bodily fluid, and gives advice for collection, storage and analytical methods. Finally, it presents a number of reliable and proven applications for saliva analysis from scientific fields including endocrinology, sports medicine, forensics and immunology.

  4. Human Reliability Analysis for Small Modular Reactors

    Energy Technology Data Exchange (ETDEWEB)

    Ronald L. Boring; David I. Gertman

    2012-06-01

    Because no human reliability analysis (HRA) method was specifically developed for small modular reactors (SMRs), the application of any current HRA method to SMRs represents tradeoffs. A first- generation HRA method like THERP provides clearly defined activity types, but these activity types do not map to the human-system interface or concept of operations confronting SMR operators. A second- generation HRA method like ATHEANA is flexible enough to be used for SMR applications, but there is currently insufficient guidance for the analyst, requiring considerably more first-of-a-kind analyses and extensive SMR expertise in order to complete a quality HRA. Although no current HRA method is optimized to SMRs, it is possible to use existing HRA methods to identify errors, incorporate them as human failure events in the probabilistic risk assessment (PRA), and quantify them. In this paper, we provided preliminary guidance to assist the human reliability analyst and reviewer in understanding how to apply current HRA methods to the domain of SMRs. While it is possible to perform a satisfactory HRA using existing HRA methods, ultimately it is desirable to formally incorporate SMR considerations into the methods. This may require the development of new HRA methods. More practicably, existing methods need to be adapted to incorporate SMRs. Such adaptations may take the form of guidance on the complex mapping between conventional light water reactors and small modular reactors. While many behaviors and activities are shared between current plants and SMRs, the methods must adapt if they are to perform a valid and accurate analysis of plant personnel performance in SMRs.

  5. Reliability-based condition assessment of steel containment and liners

    Energy Technology Data Exchange (ETDEWEB)

    Ellingwood, B.; Bhattacharya, B.; Zheng, R. [Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Civil Engineering

    1996-11-01

    Steel containments and liners in nuclear power plants may be exposed to aggressive environments that may cause their strength and stiffness to decrease during the plant service life. Among the factors recognized as having the potential to cause structural deterioration are uniform, pitting or crevice corrosion; fatigue, including crack initiation and propagation to fracture; elevated temperature; and irradiation. The evaluation of steel containments and liners for continued service must provide assurance that they are able to withstand future extreme loads during the service period with a level of reliability that is sufficient for public safety. Rational methodologies to provide such assurances can be developed using modern structural reliability analysis principles that take uncertainties in loading, strength, and degradation resulting from environmental factors into account. The research described in this report is in support of the Steel Containments and Liners Program being conducted for the US Nuclear Regulatory Commission by the Oak Ridge National Laboratory. The research demonstrates the feasibility of using reliability analysis as a tool for performing condition assessments and service life predictions of steel containments and liners. Mathematical models that describe time-dependent changes in steel due to aggressive environmental factors are identified, and statistical data supporting the use of these models in time-dependent reliability analysis are summarized. The analysis of steel containment fragility is described, and simple illustrations of the impact on reliability of structural degradation are provided. The role of nondestructive evaluation in time-dependent reliability analysis, both in terms of defect detection and sizing, is examined. A Markov model provides a tool for accounting for time-dependent changes in damage condition of a structural component or system. 151 refs.

  6. Bone scintigraphy in painful os peroneum syndrome

    DEFF Research Database (Denmark)

    Jeppesen, Johanne B; Jensen, Frank K; Falborg, Bettina

    2011-01-01

    Lateral foot pain may be caused by various entities including the painful os peroneum syndrome. A case of a 68-year-old man is presented, who experienced a trauma with distortion of the right foot. Nine months later, he still had pain in the lateral part of the right foot. Bone scintigraphy showe...

  7. Cancer en los niños

    OpenAIRE

    Pereira, Fabio; Ramírez Wurttenberger, Óscar; Lotero, Viviana; Fundación Valle de Lili

    2004-01-01

    Epidemiología/ ¿Por qué se presenta el cáncer en los niños?/ ¿Cómo se realiza el diagnóstico?/ ¿Cómo es el tratamiento?/ ¿Resultados del tratamiento?/Recomendaciones/Otras formas de tratamiento: El trasplante de médula ósea.

  8. TURISMO RURAL: PRODUTOS E SERVIÇOS

    Directory of Open Access Journals (Sweden)

    Ubiratam de Nazareth Costa Pereira

    2017-05-01

    Full Text Available Resumo - O turismo se constitui em uma importante atividade econômica geradora de empregos, renda, receitas, divisas e impostos, se apresentando como uma atividade multidimensional, multifacetada, que exerce grande influência na vida de pessoas e negócios. Dentre os mais diversos segmentos turísticos existentes, um que tem ganho destaque é o turismo rural sendo relevante o número de propriedades rurais quem tem incluído a atividade turística em suas laborações cotidianas.Isto exposto, o objetivo desse artigo é o de demonstrar as principais modalidades de produtos e ou serviços turísticos oferecidos que podem ser enquadrados como turismo rural. A pesquisa se caracteriza como um trabalho de abordagem exploratório, desenvolvido por meio de um levantamento documental e pesquisa bibliográfica sobre o tema. As atividades turísticas foram subdividias em quatro categorias, abrangendo meios de hospedagem, serviços de alimentação, agroturismo e outros produtos e serviços turísticos desenvolvidos no meio rural.

  9. Reliability and radiation effects in compound semiconductors

    CERN Document Server

    Johnston, Allan

    2010-01-01

    This book discusses reliability and radiation effects in compound semiconductors, which have evolved rapidly during the last 15 years. Johnston's perspective in the book focuses on high-reliability applications in space, but his discussion of reliability is applicable to high reliability terrestrial applications as well. The book is important because there are new reliability mechanisms present in compound semiconductors that have produced a great deal of confusion. They are complex, and appear to be major stumbling blocks in the application of these types of devices. Many of the reliability problems that were prominent research topics five to ten years ago have been solved, and the reliability of many of these devices has been improved to the level where they can be used for ten years or more with low failure rates. There is also considerable confusion about the way that space radiation affects compound semiconductors. Some optoelectronic devices are so sensitive to damage in space that they are very difficu...

  10. Reliability of Power Electronic Converter Systems

    DEFF Research Database (Denmark)

    for advancing the reliability, availability, system robustness, and maintainability of PECS at different levels of complexity. Drawing on the experience of an international team of experts, this book explores the reliability of PECS covering topics including an introduction to reliability engineering in power...... electronic converter systems; anomaly detection and remaining-life prediction for power electronics; reliability of DC-link capacitors in power electronic converters; reliability of power electronics packaging; modeling for life-time prediction of power semiconductor modules; minimization of DC......-link capacitance in power electronic converter systems; wind turbine systems; smart control strategies for improved reliability of power electronics system; lifetime modelling; power module lifetime test and state monitoring; tools for performance and reliability analysis of power electronics systems; fault...

  11. Software reliability models for critical applications

    Energy Technology Data Exchange (ETDEWEB)

    Pham, H.; Pham, M.

    1991-12-01

    This report presents the results of the first phase of the ongoing EG G Idaho, Inc. Software Reliability Research Program. The program is studying the existing software reliability models and proposes a state-of-the-art software reliability model that is relevant to the nuclear reactor control environment. This report consists of three parts: (1) summaries of the literature review of existing software reliability and fault tolerant software reliability models and their related issues, (2) proposed technique for software reliability enhancement, and (3) general discussion and future research. The development of this proposed state-of-the-art software reliability model will be performed in the second place. 407 refs., 4 figs., 2 tabs.

  12. Software reliability models for critical applications

    Energy Technology Data Exchange (ETDEWEB)

    Pham, H.; Pham, M.

    1991-12-01

    This report presents the results of the first phase of the ongoing EG&G Idaho, Inc. Software Reliability Research Program. The program is studying the existing software reliability models and proposes a state-of-the-art software reliability model that is relevant to the nuclear reactor control environment. This report consists of three parts: (1) summaries of the literature review of existing software reliability and fault tolerant software reliability models and their related issues, (2) proposed technique for software reliability enhancement, and (3) general discussion and future research. The development of this proposed state-of-the-art software reliability model will be performed in the second place. 407 refs., 4 figs., 2 tabs.

  13. DeepLearningKit - an GPU Optimized Deep Learning Framework for Apple's iOS, OS X and tvOS developed in Metal and Swift

    OpenAIRE

    Tveit, Amund; Morland, Torbjørn; Røst, Thomas Brox

    2016-01-01

    In this paper we present DeepLearningKit - an open source framework that supports using pretrained deep learning models (convolutional neural networks) for iOS, OS X and tvOS. DeepLearningKit is developed in Metal in order to utilize the GPU efficiently and Swift for integration with applications, e.g. iOS-based mobile apps on iPhone/iPad, tvOS-based apps for the big screen, or OS X desktop applications. The goal is to support using deep learning models trained with popular frameworks such as...

  14. Theory of reliable systems. [reliability analysis and on-line fault diagnosis

    Science.gov (United States)

    Meyer, J. F.

    1974-01-01

    Research is reported in the program to refine the current notion of system reliability by identifying and investigating attributes of a system which are important to reliability considerations, and to develop techniques which facilitate analysis of system reliability. Reliability analysis, and on-line fault diagnosis are discussed.

  15. 76 FR 42534 - Mandatory Reliability Standards for Interconnection Reliability Operating Limits; System...

    Science.gov (United States)

    2011-07-19

    ... Reliability Operating Limits; System Restoration Reliability Standards AGENCY: Federal Energy Regulatory... necessary to analyze and monitor Interconnection Reliability Operating Limits (IROL) within its Wide-Area... Interconnection Reliability Operating Limits, Order No. 748, 134 FERC ] 61,213 (2011). \\2\\ The term ``Wide-Area...

  16. Inter-examiner classification reliability of Mechanical Diagnosis and Therapy for extremity problems - Systematic review.

    Science.gov (United States)

    Takasaki, Hiroshi; Okuyama, Kousuke; Rosedale, Richard

    2017-02-01

    Mechanical Diagnosis and Therapy (MDT) is used in the treatment of extremity problems. Classifying clinical problems is one method of providing effective treatment to a target population. Classification reliability is a key factor to determine the precise clinical problem and to direct an appropriate intervention. To explore inter-examiner reliability of the MDT classification for extremity problems in three reliability designs: 1) vignette reliability using surveys with patient vignettes, 2) concurrent reliability, where multiple assessors decide a classification by observing someone's assessment, 3) successive reliability, where multiple assessors independently assess the same patient at different times. Systematic review with data synthesis in a quantitative format. Agreement of MDT subgroups was examined using the Kappa value, with the operational definition of acceptable reliability set at ≥ 0.6. The level of evidence was determined considering the methodological quality of the studies. Six studies were included and all studies met the criteria for high quality. Kappa values for the vignette reliability design (five studies) were ≥ 0.7. There was data from two cohorts in one study for the concurrent reliability design and the Kappa values ranged from 0.45 to 1.0. Kappa values for the successive reliability design (data from three cohorts in one study) were < 0.6. The current review found strong evidence of acceptable inter-examiner reliability of MDT classification for extremity problems in the vignette reliability design, limited evidence of acceptable reliability in the concurrent reliability design and unacceptable reliability in the successive reliability design. Copyright © 2017 Elsevier Ltd. All rights reserved.

  17. Reliability and Validity of Autism Assessments and Diagnosis Using Telemedicine?

    Science.gov (United States)

    2009-09-01

    school-based telehealth care in urban and rural elementary schools. Pediatrics, 112, 1088-1094. Appendices 1. Telemedicine Satisfaction Survey...TITLE: Reliability and Validity of Autism Assessments and Diagnosis Using Telemedicine ? PRINCIPAL INVESTIGATOR: R. Matthew Reese, PhD T...release; distribution unlimited 13. SUPPLEMENTARY NOTES 14. ABSTRACT Telemedicine is increasingly utilized as a means to provide health care

  18. Authenticity, Validity and Reliability in A-Level English Literature

    Science.gov (United States)

    Hodgson, John

    2017-01-01

    This article discusses the use of assessment by teachers to replace external marking. It shows how professional participation and moderation can provide reliability in summative assessment, even in public examinations for older students. It draws on historical experiences of assessment for A-level English literature.

  19. Reliability modelling and simulation of switched linear system ...

    African Journals Online (AJOL)

    Thus, constructing a subsystem Markov model and matching its parameters with the specified safety factors provides the basis for the entire system analysis. For the system simulation, temporal databases and predictive control algorithm are designed. The simulation results are analyzed to assess the reliability of the system ...

  20. Perspectives on the climatic reliability issues of electronic devices

    DEFF Research Database (Denmark)

    Ambat, Rajan; Jellesen, Morten Stendahl; Verdingovas, Vadimas

    2014-01-01

    This paper provides a short overview of the climatic reliability issues of electronic de-vices and components with a focus on the metals/alloys usage on PCBA surface to-gether with cleanliness issues, humidity interaction on PCBA surface, and PCBA de-sign and device design aspects....

  1. Optimum reliable operation of water distribution networks by ...

    African Journals Online (AJOL)

    In recent decades much attention has been paid to optimal operation of water distribution networks (WDNs). In this regard, the system operation costs, including energy and disinfection chemicals, as well as system reliability should be simultaneously considered in system performance optimisation, to provide the minimum ...

  2. Reliability and validity of triage systems in paediatric emergency care

    NARCIS (Netherlands)

    M. van Veen (Mirjam); H.A. Moll (Henriëtte)

    2009-01-01

    textabstractBackground. Triage in paediatric emergency care is an important tool to prioritize seriously ill children. Triage can also be used to identify patients who do not need urgent care and who can safely wait. The aim of this review was to provide an overview of the literature on reliability

  3. Estimating Examination Failure Rates and Reliability Prior to Administration.

    Science.gov (United States)

    McIntosh, Vergil M.

    Using estimates of item ease and item discrimination, procedures are provided for computing estimates of the reliability and percentage of failing scores for tests assembled from these items. Two assumptions are made: that the average item coefficient will be approximately equal to the average of the estimated coefficients and that the score…

  4. Reliable Communication in Wireless Meshed Networks using Network Coding

    DEFF Research Database (Denmark)

    Pahlevani, Peyman; Paramanathan, Achuthan; Hundebøll, Martin

    2012-01-01

    The advantages of network coding have been extensively studied in the field of wireless networks. Integrating network coding with existing IEEE 802.11 MAC layer is a challenging problem. The IEEE 802.11 MAC does not provide any reliability mechanisms for overheard packets. This paper addresses th...... introduce some signaling overhead, the results show that the performance is yet improved....

  5. Length effects in reliability analysis of flood protection systems

    NARCIS (Netherlands)

    Vrouwenvelder, A.C.W.M.

    2006-01-01

    The defence against flooding by storm surges and large river discharges are provided by complex systems of dikes, dunes, retaining walls, higher grounds, barriers, locks and so on. Spatial correlations inside and between the various components play an important role in the reliability and risk

  6. RF-MEMS capacitive switches with high reliability

    Science.gov (United States)

    Goldsmith, Charles L.; Auciello, Orlando H.; Carlisle, John A.; Sampath, Suresh; Sumant, Anirudha V.; Carpick, Robert W.; Hwang, James; Mancini, Derrick C.; Gudeman, Chris

    2013-09-03

    A reliable long life RF-MEMS capacitive switch is provided with a dielectric layer comprising a "fast discharge diamond dielectric layer" and enabling rapid switch recovery, dielectric layer charging and discharging that is efficient and effective to enable RF-MEMS switch operation to greater than or equal to 100 billion cycles.

  7. Design methodologies for reliability of SSL LED boards

    NARCIS (Netherlands)

    Jakovenko, J.; Formánek, J.; Perpiñà, X.; Jorda, X.; Vellvehi, M.; Werkhoven, R.J.; Husák, M.; Kunen, J.M.G.; Bancken, P.; Bolt, P.J.; Gasse, A.

    2013-01-01

    This work presents a comparison of various LED board technologies from thermal, mechanical and reliability point of view provided by an accurate 3-D modelling. LED boards are proposed as a possible technology replacement of FR4 LED boards used in 400 lumen retrofit SSL lamps. Presented design

  8. Architecture-Based Reliability Analysis of Web Services

    Science.gov (United States)

    Rahmani, Cobra Mariam

    2012-01-01

    In a Service Oriented Architecture (SOA), the hierarchical complexity of Web Services (WS) and their interactions with the underlying Application Server (AS) create new challenges in providing a realistic estimate of WS performance and reliability. The current approaches often treat the entire WS environment as a black-box. Thus, the sensitivity…

  9. 78 FR 27963 - Reliability Technical Conference; Notice of Technical Conference

    Science.gov (United States)

    2013-05-13

    ... Energy Regulatory Commission Reliability Technical Conference; Notice of Technical Conference Take notice that the Federal Energy Regulatory Commission will hold a Technical Conference on Tuesday, July 9, 2013... to the webcast. The Capitol Connection provides technical support for webcasts and offers the option...

  10. Evaluation of nano-ZnOs as a novel Zn source for marine fish: importance of digestive physiology.

    Science.gov (United States)

    Wang, Jian; Wang, Aili; Wang, Wen-Xiong

    2017-10-01

    Waterborne nanotoxicology of zinc oxide nanoparticles (nano-ZnOs) has been extensively studied over the past decade, whereas their potential dietary toxicity and applications were seldom investigated. In the present study, we systematically investigated both short-term bioavailability and chronic effects of nano-ZnOs to two marine fish (marine medaka Oryzias melastigma and red drum Sciaenops ocellatus). At normal supplementary level (80 mg Zn/kg), red drum (with a stomach) had similar assimilation efficiencies of nano-ZnOs and ZnCl2. Correspondingly, in vitro digestion experiments showed the continuous dissolution of nano-ZnOs in acid environment. In contrast, nano-ZnOs were more bioavailable than ZnCl2 to medaka (stomach-less) at 80 mg Zn/kg supplementary level. There results were further validated by using bulk-ZnOs. Chronic dietary exposure to nano-ZnOs (80 mg/kg) significantly enhanced the antioxidative defenses in medaka, with no negative effect on fish growth. Beneficial effects disappeared in the high dietary nano-ZnOs (300 mg/kg) treatment. For the first time, we provided direct evidence that nano-ZnOs was more bioavailable than ZnCl2 and bulk-ZnOs to stomach-less fish at normal dietary Zn inclusion level (nano-ZnOs toxicity on stomach-less fish due to the presence of real 'nano-effects.'

  11. Involvement of the OsMKK4-OsMPK1 Cascade and its Downstream Transcription Factor OsWRKY53 in the Wounding Response in Rice

    Directory of Open Access Journals (Sweden)

    Seung Jin Yoo

    2014-06-01

    Full Text Available Plant has possessed diverse stress signals from outside and maintained its fitness. Out of such plant responses, it is well known that mitogen-activated protein kinase (MAPK cascade plays important role in wounding and pathogen attack in most dicot plants. However, little is understood about its role in wounding response for the economically important monocot rice plant. In this study, therefore, the involvement of MAPK was investigated to understand the wounding signaling pathway in rice. The OsMPK1 was rapidly activated by wounding within 10 min, and OsMPK1 was also activated by challenge of rice blast fungus. Further analysis revealed that OsMKK4, the upstream kinase of OsMPK1, phosphorylated OsMPK1 by wounding in vivo. Furthermore, OsMPK1 directly interacted with a rice defense-related transcription factor OsWRKY53. To understand a functional link between MAPK and its target transcription factor, we showed that OsMPK1 activated by the constitutively active mutant OsMKK4DD phosphorylated OsWRKY53 in vitro. Taken together, components involving in the wounding signaling pathway, OsMKK4-OsMPK1-OsWRKY53, can be important players in regulating crosstalk between abiotic stress and biotic stress.

  12. Theory of maintenance and reliability

    OpenAIRE

    Novák, Marek

    2014-01-01

    Tato práce je zaměřena na teorii údržby a spolehlivost. Otázka údržby a spolehlivosti je velmi důležitá při provozu strojů, zařízení atd. a její řešení může vést ke snížení provozních nákladů. V práci jsou popsány základní pojmy související s teorií údržby a spolehlivostí. Je také mimo jiné popsán postupný vývoj systémů údržby. V závěru je uveden příklad ze strojírenské praxe s jeho rozborem a zhodnocením. The Bachelor thesis is focused on theory of maintenance and reliability. Question of...

  13. Reliability of analog quantum simulation

    Energy Technology Data Exchange (ETDEWEB)

    Sarovar, Mohan [Sandia National Laboratories, Digital and Quantum Information Systems, Livermore, CA (United States); Zhang, Jun; Zeng, Lishan [Shanghai Jiao Tong University, Joint Institute of UMich-SJTU, Key Laboratory of System Control and Information Processing (MOE), Shanghai (China)

    2017-12-15

    Analog quantum simulators (AQS) will likely be the first nontrivial application of quantum technology for predictive simulation. However, there remain questions regarding the degree of confidence that can be placed in the results of AQS since they do not naturally incorporate error correction. Specifically, how do we know whether an analog simulation of a quantum model will produce predictions that agree with the ideal model in the presence of inevitable imperfections? At the same time there is a widely held expectation that certain quantum simulation questions will be robust to errors and perturbations in the underlying hardware. Resolving these two points of view is a critical step in making the most of this promising technology. In this work we formalize the notion of AQS reliability by determining sensitivity of AQS outputs to underlying parameters, and formulate conditions for robust simulation. Our approach naturally reveals the importance of model symmetries in dictating the robust properties. To demonstrate the approach, we characterize the robust features of a variety of quantum many-body models. (orig.)

  14. Evaluation of MHTGR fuel reliability

    Energy Technology Data Exchange (ETDEWEB)

    Wichner, R.P. [Oak Ridge National Lab., TN (United States); Barthold, W.P. [Barthold Associates, Inc., Knoxville, TN (United States)

    1992-07-01

    Modular High-Temperature Gas-Cooled Reactor (MHTGR) concepts that house the reactor vessel in a tight but unsealed reactor building place heightened importance on the reliability of the fuel particle coatings as fission product barriers. Though accident consequence analyses continue to show favorable results, the increased dependence on one type of barrier, in addition to a number of other factors, has caused the Nuclear Regulatory Commission (NRC) to consider conservative assumptions regarding fuel behavior. For this purpose, the concept termed ``weak fuel`` has been proposed on an interim basis. ``Weak fuel`` is a penalty imposed on consequence analyses whereby the fuel is assumed to respond less favorably to environmental conditions than predicted by behavioral models. The rationale for adopting this penalty, as well as conditions that would permit its reduction or elimination, are examined in this report. The evaluation includes an examination of possible fuel-manufacturing defects, quality-control procedures for defect detection, and the mechanisms by which fuel defects may lead to failure.

  15. Juicio económico en niños de 10 años

    OpenAIRE

    Martínez Bartel, Alba

    2015-01-01

    En el siguiente trabajo se expone, tomando como modelo de referencia los estudios de Piaget y Kohlbeg, un acercamiento al comportamiento económico en niños y los diferentes procesos mentales que en ellos se desarrollan. Para ello se realiza una revisión de las distintas teorías sobre el proceso de toma de decisiones, obteniendo, mediante la realización de un estudio piloto sobre los juicios económicos de niños de 10 años, conclusiones qu...

  16. System and Software Reliability (C103)

    Science.gov (United States)

    Wallace, Dolores

    2003-01-01

    Within the last decade better reliability models (hardware. software, system) than those currently used have been theorized and developed but not implemented in practice. Previous research on software reliability has shown that while some existing software reliability models are practical, they are no accurate enough. New paradigms of development (e.g. OO) have appeared and associated reliability models have been proposed posed but not investigated. Hardware models have been extensively investigated but not integrated into a system framework. System reliability modeling is the weakest of the three. NASA engineers need better methods and tools to demonstrate that the products meet NASA requirements for reliability measurement. For the new models for the software component of the last decade, there is a great need to bring them into a form that they can be used on software intensive systems. The Statistical Modeling and Estimation of Reliability Functions for Systems (SMERFS'3) tool is an existing vehicle that may be used to incorporate these new modeling advances. Adapting some existing software reliability modeling changes to accommodate major changes in software development technology may also show substantial improvement in prediction accuracy. With some additional research, the next step is to identify and investigate system reliability. System reliability models could then be incorporated in a tool such as SMERFS'3. This tool with better models would greatly add value in assess in GSFC projects.

  17. Os Desafios da Epidemia do Ebola

    Directory of Open Access Journals (Sweden)

    Manoel Dias da Fonsêca Neto

    2014-09-01

    Full Text Available Desde que se criaram as condições para a existência de aglomerados populacionais, os grandes flagelos sanitários da humanidade sempre estiveram presentes. As condições de vida, os desastres naturais ou provocados, podem agravar consideravelmente o risco de epidemias. Ao largo da história da humanidade, se viu populações de todo o mundo afetadas esporadicamente por surtos devastadores de doenças infecciosas, com destaque para cólera, peste e varíola. Hipocrates (460-377 AC e Galeno (129-216 DC já descreveram em suas épocas um doença que provavelmente era a cólera(1.A relação entre doença e civilização tem raízes mais antigas que a historia escrita. Os males sofridos durante os primeiros estágios da evolução humana foram identificados através de estudos arqueológicos(2.A atualidade é marcada por erupções recorrentes de doenças recém- descobertas, como o hantavirus, a AIDS, o ebola e gripes provocadas por vírus de diversas estruturas, entre outras epidemias de doenças que migraram para novas áreas, moléstias que adquiriram importância através de tecnologias humanas, como as síndromes de choques tóxicos, a doença dos legionários e zoonoses, em decorrência da destruição dos habitats naturais dos animais pelo homem. Algumas dessas doenças são potencialmente epidêmicas, e poderão gerar epidemias em grande escala, até mundial, a exemplo da epidemia global do vírus da imunodeficiência humana, a AIDS, considerada a primeira doença infecciosa epidêmica moderna(2,3.O grande aumento da movimentação de pessoas e mercadorias pelo mundo é força motriz por trás da globalização das doenças, tornando o mundo mais rapidamente vulnerável às mesmas e à sua propagação, tanto de antigas como de novas enfermidades. As pessoas e as mercadorias passaram a viajar e circular mais, muito mais rápido e a mais lugares e com elas, transportam-se micro-organismos a locais onde antes inexistiam. A nova epidemia

  18. A vulnerabilidade dos Estados Unidos perante os novos inimigos

    Directory of Open Access Journals (Sweden)

    VIRGILIO ARRAES

    2011-09-01

    Full Text Available O presente artigo busca analisar os impactos que os recentes atentados terroristas de 11 de setembro de 2001 terão para os Estados Unidos enquanto grande líder mundial, além de delinear os possíveis rumos desse país na nova ordem mundial.

  19. Managing Reliability in the 21st Century

    Energy Technology Data Exchange (ETDEWEB)

    Dellin, T.A.

    1998-11-23

    The rapid pace of change at Ike end of the 20th Century should continue unabated well into the 21st Century. The driver will be the marketplace imperative of "faster, better, cheaper." This imperative has already stimulated a revolution-in-engineering in design and manufacturing. In contrast, to date, reliability engineering has not undergone a similar level of change. It is critical that we implement a corresponding revolution-in-reliability-engineering as we enter the new millennium. If we are still using 20th Century reliability approaches in the 21st Century, then reliability issues will be the limiting factor in faster, better, and cheaper. At the heart of this reliability revolution will be a science-based approach to reliability engineering. Science-based reliability will enable building-in reliability, application-specific products, virtual qualification, and predictive maintenance. The purpose of this paper is to stimulate a dialogue on the future of reliability engineering. We will try to gaze into the crystal ball and predict some key issues that will drive reliability programs in the new millennium. In the 21st Century, we will demand more of our reliability programs. We will need the ability to make accurate reliability predictions that will enable optimizing cost, performance and time-to-market to meet the needs of every market segment. We will require that all of these new capabilities be in place prior to the stint of a product development cycle. The management of reliability programs will be driven by quantifiable metrics of value added to the organization business objectives.

  20. Reliability studies of diagnostic methods in Indian traditional Ayurveda medicine: An overview

    Science.gov (United States)

    Kurande, Vrinda Hitendra; Waagepetersen, Rasmus; Toft, Egon; Prasad, Ramjee

    2013-01-01

    Recently, a need to develop supportive new scientific evidence for contemporary Ayurveda has emerged. One of the research objectives is an assessment of the reliability of diagnoses and treatment. Reliability is a quantitative measure of consistency. It is a crucial issue in classification (such as prakriti classification), method development (pulse diagnosis), quality assurance for diagnosis and treatment and in the conduct of clinical studies. Several reliability studies are conducted in western medicine. The investigation of the reliability of traditional Chinese, Japanese and Sasang medicine diagnoses is in the formative stage. However, reliability studies in Ayurveda are in the preliminary stage. In this paper, examples are provided to illustrate relevant concepts of reliability studies of diagnostic methods and their implication in practice, education, and training. An introduction to reliability estimates and different study designs and statistical analysis is given for future studies in Ayurveda. PMID:23930037

  1. A reliability and mass perspective of SP-100 Stirling cycle lunar-base powerplant designs

    Energy Technology Data Exchange (ETDEWEB)

    Bloomfield, H.S.

    1991-06-01

    The purpose was to obtain reliability and mass perspectives on selection of space power system conceptual designs based on SP-100 reactor and Stirling cycle power-generation subsystems. The approach taken was to: (1) develop a criterion for an acceptable overall reliability risk as a function of the expected range of emerging technology subsystem unit reliabilities; (2) conduct reliability and mass analyses for a diverse matrix of 800-kWe lunar-base design configurations employing single and multiple powerplants with both full and partial subsystem redundancy combinations; and (3) derive reliability and mass perspectives on selection of conceptual design configurations that meet an acceptable reliability criterion with the minimum system mass increase relative to reference powerplant design. The developed perspectives provided valuable insight into the considerations required to identify and characterize high-reliability and low-mass lunar-base powerplant conceptual design.

  2. OsWRKY IIa Transcription Factors Modulate Rice Innate Immunity

    OpenAIRE

    Peng, Ying; Laura E. Bartley; Canlas, Patrick; Ronald, Pamela C

    2010-01-01

    WRKY transcription factors regulate diverse plant processes including responses to biotic stresses. Our previous studies indicate that OsWRKY62, an OsWRKY IIa subfamily member, functions as a negative regulator of the rice defense against Xanthomonas oryzae pv. oryzae. Here, we report that a large inverted repeat construct designed to knock down the expression of the four OsWRKY IIa subfamily members (OsWRKY62, OsWRKY28, OsWRKY71, and OsWRKY76) leads to overexpression of all four genes and di...

  3. Reliability in Warehouse-Scale Computing: Why Low Latency Matters

    DEFF Research Database (Denmark)

    Nannarelli, Alberto

    2015-01-01

    Warehouse sized buildings are nowadays hosting several types of large computing systems: from supercomputers to large clusters of servers to provide the infrastructure to the cloud. Although the main target, especially for high-performance computing, is still to achieve high throughput, the limit...... a minimal power envelope and to maintain high throughput and high reliability poses hard challenges. In this work, we show that by moving part of the computation to accelerators, not only we reduce the latency of operations, but also make the system more energy efficient and reliable....

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

    Energy Technology Data Exchange (ETDEWEB)

    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.

  5. Reliability modeling and analysis of smart power systems

    CERN Document Server

    Karki, Rajesh; Verma, Ajit Kumar

    2014-01-01

    The volume presents the research work in understanding, modeling and quantifying the risks associated with different ways of implementing smart grid technology in power systems in order to plan and operate a modern power system with an acceptable level of reliability. Power systems throughout the world are undergoing significant changes creating new challenges to system planning and operation in order to provide reliable and efficient use of electrical energy. The appropriate use of smart grid technology is an important drive in mitigating these problems and requires considerable research acti

  6. Design for reliability information and computer-based systems

    CERN Document Server

    Bauer, Eric

    2010-01-01

    "System reliability, availability and robustness are often not well understood by system architects, engineers and developers. They often don't understand what drives customer's availability expectations, how to frame verifiable availability/robustness requirements, how to manage and budget availability/robustness, how to methodically architect and design systems that meet robustness requirements, and so on. The book takes a very pragmatic approach of framing reliability and robustness as a functional aspect of a system so that architects, designers, developers and testers can address it as a concrete, functional attribute of a system, rather than an abstract, non-functional notion"--Provided by publisher.

  7. Statistical models and methods for reliability and survival analysis

    CERN Document Server

    Couallier, Vincent; Huber-Carol, Catherine; Mesbah, Mounir; Huber -Carol, Catherine; Limnios, Nikolaos; Gerville-Reache, Leo

    2013-01-01

    Statistical Models and Methods for Reliability and Survival Analysis brings together contributions by specialists in statistical theory as they discuss their applications providing up-to-date developments in methods used in survival analysis, statistical goodness of fit, stochastic processes for system reliability, amongst others. Many of these are related to the work of Professor M. Nikulin in statistics over the past 30 years. The authors gather together various contributions with a broad array of techniques and results, divided into three parts - Statistical Models and Methods, Statistical

  8. Enhanced functionality and reliability testing of laser-initiated systems

    Science.gov (United States)

    Hand, Carter F.; Petrowski, Alane; Brunet, François

    2009-08-01

    Laser initiation of explosive material requires consistent achievement of specific optical power densities and extremely high reliability under a wide variety of harsh environmental conditions. Ensuring successful and timely detonation drives laser diode-based systems towards testing algorithms that far exceed the standard Telcordia GR-468 qualifications. As diode technology advances, options for increased power density and alternate system configurations expand. An understanding of the basis of diode laser reliability in this application will be provided, along with key optical system metrics for a variety of current and future LIO systems.

  9. Teach yourself visually OS X Mountain Lion

    CERN Document Server

    McFedries, Paul

    2012-01-01

    Get to know the new cat in the pride-Mac OS X Mountain Lion-with this VISUAL guide Apple's new Mac OS X Mountain Lion is impressive, with features and functions that will be familiar to Mac users from their iPhones and iPads. Make sure you get the most out of your new big cat with this practical guide. Using step-by-step instructions and full-color screenshots or illustrations on virtually every page-the hallmark of the practical Teach Yourself VISUALLY series-this book clearly shows you how to accomplish tasks, rather than burying you with paragraphs of text. You'll learn how to customize

  10. iOS cloud development dor dummies

    CERN Document Server

    Goldstein, Neal

    2012-01-01

    Want to create robust, data-driven, iOS cloud apps? This book makes it easier! Apple's mobile operating system (iOS) supports iPhones, iPads, iPods and other Apple devices, and while even beginners can now develop apps to run just on these devices themselves, sometimes you want to create an app with more heft. Applications such as live weather reports or multi-player games require a lot of data to be pulled from outside—often from cloud-based Web Services, such as Google or Amazon. This book, written by application development experts Sujee Maniyam and Neal Goldstein, shows you how to we

  11. PV Systems Reliability Final Technical Report.

    Energy Technology Data Exchange (ETDEWEB)

    Lavrova, Olga [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Flicker, Jack David [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Johnson, Jay [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Armijo, Kenneth Miguel [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Gonzalez, Sigifredo [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Schindelholz, Eric John [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sorensen, Neil R. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Yang, Benjamin Bing-Yeh [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2015-12-01

    The continued exponential growth of photovoltaic technologies paves a path to a solar-powered world, but requires continued progress toward low-cost, high-reliability, high-performance photovoltaic (PV) systems. High reliability is an essential element in achieving low-cost solar electricity by reducing operation and maintenance (O&M) costs and extending system lifetime and availability, but these attributes are difficult to verify at the time of installation. Utilities, financiers, homeowners, and planners are demanding this information in order to evaluate their financial risk as a prerequisite to large investments. Reliability research and development (R&D) is needed to build market confidence by improving product reliability and by improving predictions of system availability, O&M cost, and lifetime. This project is focused on understanding, predicting, and improving the reliability of PV systems. The two areas being pursued include PV arc-fault and ground fault issues, and inverter reliability.

  12. Reliability Based Optimization of Structural Systems

    DEFF Research Database (Denmark)

    Sørensen, John Dalsgaard

    1987-01-01

    The optimization problem to design structural systems such that the reliability is satisfactory during the whole lifetime of the structure is considered in this paper. Some of the quantities modelling the loads and the strength of the structure are modelled as random variables. The reliability....... For these optimization problems it is described how a sensitivity analysis can be performed. Next, new optimization procedures to solve the optimization problems are presented. Two of these procedures solve the system reliability based optimization problem sequentially using quasi-analytical derivatives. Finally...... is estimated using first. order reliability methods ( FORM ). The design problem is formulated as the optimization problem to minimize a given cost function such that the reliability of the single elements satisfies given requirements or such that the systems reliability satisfies a given requirement...

  13. Reliability Growth in Space Life Support Systems

    Science.gov (United States)

    Jones, Harry W.

    2014-01-01

    A hardware system's failure rate often increases over time due to wear and aging, but not always. Some systems instead show reliability growth, a decreasing failure rate with time, due to effective failure analysis and remedial hardware upgrades. Reliability grows when failure causes are removed by improved design. A mathematical reliability growth model allows the reliability growth rate to be computed from the failure data. The space shuttle was extensively maintained, refurbished, and upgraded after each flight and it experienced significant reliability growth during its operational life. In contrast, the International Space Station (ISS) is much more difficult to maintain and upgrade and its failure rate has been constant over time. The ISS Carbon Dioxide Removal Assembly (CDRA) reliability has slightly decreased. Failures on ISS and with the ISS CDRA continue to be a challenge.

  14. Reliability and validity in a nutshell.

    Science.gov (United States)

    Bannigan, Katrina; Watson, Roger

    2009-12-01

    To explore and explain the different concepts of reliability and validity as they are related to measurement instruments in social science and health care. There are different concepts contained in the terms reliability and validity and these are often explained poorly and there is often confusion between them. To develop some clarity about reliability and validity a conceptual framework was built based on the existing literature. The concepts of reliability, validity and utility are explored and explained. Reliability contains the concepts of internal consistency and stability and equivalence. Validity contains the concepts of content, face, criterion, concurrent, predictive, construct, convergent (and divergent), factorial and discriminant. In addition, for clinical practice and research, it is essential to establish the utility of a measurement instrument. To use measurement instruments appropriately in clinical practice, the extent to which they are reliable, valid and usable must be established.

  15. By-product information can stabilize the reliability of communication.

    Science.gov (United States)

    Schaefer, H Martin; Ruxton, G D

    2012-12-01

    Although communication underpins many biological processes, its function and basic definition remain contentious. In particular, researchers have debated whether information should be an integral part of a definition of communication and how it remains reliable. So far the handicap principle, assuming signal costs to stabilize reliable communication, has been the predominant paradigm in the study of animal communication. The role of by-product information produced by mechanisms other than the communicative interaction has been neglected in the debate on signal reliability. We argue that by-product information is common and that it provides the starting point for ritualization as the process of the evolution of communication. Second, by-product information remains unchanged during ritualization and enforces reliable communication by restricting the options for manipulation and cheating. Third, this perspective changes the focus of research on communication from studying signal costs to studying the costs of cheating. It can thus explain the reliability of signalling in many communication systems that do not rely on handicaps. We emphasize that communication can often be informative but that the evolution of communication does not cause the evolution of information because by-product information often predates and stimulates the evolution of communication. Communication is thus a consequence but not a cause of reliability. Communication is the interplay of inadvertent, informative traits and evolved traits that increase the stimulation and perception of perceivers. Viewing communication as a complex of inadvertent and derived traits facilitates understanding of the selective pressures shaping communication and those shaping information and its reliability. This viewpoint further contributes to resolving the current controversy on the role of information in communication. © 2012 The Authors. Journal of Evolutionary Biology © 2012 European Society For Evolutionary

  16. Cost-effective solutions to maintaining smart grid reliability

    Science.gov (United States)

    Qin, Qiu

    As the aging power systems are increasingly working closer to the capacity and thermal limits, maintaining an sufficient reliability has been of great concern to the government agency, utility companies and users. This dissertation focuses on improving the reliability of transmission and distribution systems. Based on the wide area measurements, multiple model algorithms are developed to diagnose transmission line three-phase short to ground faults in the presence of protection misoperations. The multiple model algorithms utilize the electric network dynamics to provide prompt and reliable diagnosis outcomes. Computational complexity of the diagnosis algorithm is reduced by using a two-step heuristic. The multiple model algorithm is incorporated into a hybrid simulation framework, which consist of both continuous state simulation and discrete event simulation, to study the operation of transmission systems. With hybrid simulation, line switching strategy for enhancing the tolerance to protection misoperations is studied based on the concept of security index, which involves the faulted mode probability and stability coverage. Local measurements are used to track the generator state and faulty mode probabilities are calculated in the multiple model algorithms. FACTS devices are considered as controllers for the transmission system. The placement of FACTS devices into power systems is investigated with a criterion of maintaining a prescribed level of control reconfigurability. Control reconfigurability measures the small signal combined controllability and observability of a power system with an additional requirement on fault tolerance. For the distribution systems, a hierarchical framework, including a high level recloser allocation scheme and a low level recloser placement scheme, is presented. The impacts of recloser placement on the reliability indices is analyzed. Evaluation of reliability indices in the placement process is carried out via discrete event

  17. Melancolia in progress: uma leitura de Os famosos e os duendes da morte

    Directory of Open Access Journals (Sweden)

    Rejane Rocha

    2014-07-01

    Full Text Available RESUMO: Este artigo analisa o romance Os famosos e os duendes da morte, discutindo a maneira como a literatura pode ser compreendida no contexto da convergência midiática. O romance, uma das obras que constituem um projeto que compreende, também, filme, trilha sonora e vídeos compartilhados no youtube, pode ser discutido como um exemplo de procedimentos de leitura e de escrita característicos do contexto digital. ABSTRACT: This paper analyzes the novel Os famosos e os duendes da morte, discussing how literature can be understood in the context of media convergence. This novel is a piece of work related to a wider project that also includes a movie, a soundtrack and several videos uploaded to YouTube. Because of this, it illustrates some writing and reading procedures that are typical of the digital context.

  18. Deseabilidad social en niños y adultos puertorriqueños

    Directory of Open Access Journals (Sweden)

    José Luis Porrata

    1995-01-01

    Full Text Available En este estudio se examinan las puntuaciones en deseabilidad social de niños y adultos puertorriqueños. Deseabilidad social es la tendencia a contestar en formas socialmente deseables. Cuando los ciudadanos de un país obtienen puntuaciones altas en deseabilidad social se interpreta como una tendencia a conformar en esa sociedad. Al comparar las puntuaciones en deseabilidad social entre puertorriqueños y británicos, los puertorriqueños puntúan más alto que sus contraparte británicos. Se ven estos resultados como una personalidad del puertorriqueño que muestra cohesión social, pero que necesita estar más seguro al aumentar su habilidad para resolver problemas

  19. Towards an integrated EU data system within AtlantOS project

    Science.gov (United States)

    Pouliquen, Sylvie; Harscoat, Valerie; Waldmann, Christoph; Koop-Jakobsen, ketill

    2017-04-01

    The H2020 AtlantOS project started in June 2015 and aims to optimise and enhance the Integrated Atlantic Ocean Observing Systems (IAOOS). One goal is to ensure that data from different and diverse in-situ observing networks are readily accessible and useable to the wider community, international ocean science community and other stakeholders in this field. To achieve that, the strategy is to move towards an integrated data system within AtlantOS that harmonises work flows, data processing and distribution across the in-situ observing network systems, and integrates in-situ observations in existing European and international data infrastructures (Copernicus marine service, SeaDataNet NODCs, EMODnet, OBIS, GEOSS) so called Integrators. The targeted integrated system will deal with data management challenges for efficient and reliable data service to users: • Quality control commons for heterogeneous and nearly real time data • Standardisation of mandatory metadata for efficient data exchange • Interoperability of network and integrator data management systems Presently the situation is that the data acquired by the different in situ observing networks contributing to the AtlantOS project are processed and distributed using different methodologies and means. Depending on the network data management organization, the data are either processed following recommendations elaborated y the network teams and accessible through a unique portal (FTP or Web), or are processed by individual scientific researchers and made available through National Data Centres or directly at institution level. Some datasets are available through Integrators, such as Copernicus or EMODnet, but connected through ad-hoc links. To facilitate the access to the Atlantic observations and avoid "mixing pears with apples", it has been necessary to agree on (1) the EOVs list and definition across the Networks, (2) a minimum set of common vocabularies for metadata and data description to be used by

  20. Tipos especiales de niños

    Directory of Open Access Journals (Sweden)

    Mercedes Rodrigo Bellido

    1946-09-01

    Full Text Available En las tres últimas lecciones han sido expuestas algunas consideraciones referentes a niños y adolescentes desde el nacimiento hasta el dintel de la juventud. En todas ellas hemos procurado poner de relieve la necesidad de individualizar el conocimiento de cada niño para obtener mejores resultados en su adaptación a su futura vida de adultos, En todas ellas  nos hemos referido al llamado niño normal. Nos corresponde en la lección de hoy ocuparnos can la superficialidad característica de estas charlas tipo-muestrario, de otras categorías de niños muy dignos de interés.. quienes unas por exceso, otros por defecto, otros por dificultades de adaptación por diferentes causas, se desvían de la línea media de la normalidad. Consideramos que no está fuera del lugar, aquí, el tema de los niños excepcionales y por el contrario que es necesario intensificar el estudio de los trastornos de la vida mental y emocional de los niños en la preparación de los estudiantes de Medicina. Y no es nuestra solo esta opinión; no hace mucho tiempo en la Medical School de Ia Universidad de Minnessota hemos sabido que se ha hecho un intento de considerar y evaluar factores emocionales ambientales sobre las mismas bases que los descubrimientos fisiológicos.