WorldWideScience

Sample records for lsc consistency checking

  1. Consistency Checking of Web Service Contracts

    DEFF Research Database (Denmark)

    Cambronero, M. Emilia; Okika, Joseph C.; Ravn, Anders Peter

    2008-01-01

    Behavioural properties are analyzed for web service contracts formulated in Business Process Execution Language (BPEL) and Choreography Description Language (CDL). The key result reported is an automated technique to check consistency between protocol aspects of the contracts. The contracts...... are abstracted to (timed) automata and from there a simulation is set up, which is checked using automated tools for analyzing networks of finite state processes. Here we use the Concurrency Work Bench. The proposed techniques are illustrated with a case study that include otherwise difficult to analyze fault...

  2. Checking Consistency of Pedigree Information is NP-complete

    DEFF Research Database (Denmark)

    Aceto, Luca; Hansen, Jens A.; Ingolfsdottir, Anna

    Consistency checking is a fundamental computational problem in genetics. Given a pedigree and information on the genotypes of some of the individuals in it, the aim of consistency checking is to determine whether these data are consistent with the classic Mendelian laws of inheritance. This probl...

  3. Decentralized Consistency Checking in Cross-organizational Workflows

    NARCIS (Netherlands)

    Wombacher, Andreas

    Service Oriented Architectures facilitate loosely coupled composed services, which are established in a decentralized way. One challenge for such composed services is to guarantee consistency, i.e., deadlock-freeness. This paper presents a decentralized approach to consistency checking, which

  4. Decentralized Consistency Checking in Cross-organizational Workflows

    NARCIS (Netherlands)

    Wombacher, A.

    2006-01-01

    Service Oriented Architectures facilitate loosely coupled composed services, which are established in a decentralized way. One challenge for such composed services is to guarantee consistency, i.e., deadlock-freeness. This paper presents a decentralized approach to consistency checking, which utiliz

  5. Checking Consistency of Pedigree Information is NP-complete

    DEFF Research Database (Denmark)

    Aceto, Luca; Hansen, Jens A.; Ingolfsdottir, Anna

    arose originally from the geneticists' need to filter their input data from erroneous information, and is well motivated from both a biological and a sociological viewpoint. This paper shows that consistency checking is NP-complete, even in the presence of three alleles. Several other results...

  6. Model Checking Data Consistency for Cache Coherence Protocols

    Institute of Scientific and Technical Information of China (English)

    Hong Pan; Hui-Min Lin; Yi Lv

    2006-01-01

    A method for automatic verification of cache coherence protocols is presented, in which cache coherence protocols are modeled as concurrent value-passing processes, and control and data consistency requirement are described as formulas in first-orderμ-calculus. A model checker is employed to check if the protocol under investigation satisfies the required properties. Using this method a data consistency error has been revealed in a well-known cache coherence protocol.The error has been corrected, and the revised protocol has been shown free from data consistency error for any data domain size, by appealing to data independence technique.

  7. Non-trivial checks of novel consistency relations

    Energy Technology Data Exchange (ETDEWEB)

    Berezhiani, Lasha; Khoury, Justin [Center for Particle Cosmology, Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104 (United States); Wang, Junpu, E-mail: lashaber@gmail.com, E-mail: jkhoury@sas.upenn.edu, E-mail: jwang217@jhu.edu [Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218 (United States)

    2014-06-01

    Single-field perturbations satisfy an infinite number of consistency relations constraining the squeezed limit of correlation functions at each order in the soft momentum. These can be understood as Ward identities for an infinite set of residual global symmetries, or equivalently as Slavnov-Taylor identities for spatial diffeomorphisms. In this paper, we perform a number of novel, non-trivial checks of the identities in the context of single field inflationary models with arbitrary sound speed. We focus for concreteness on identities involving 3-point functions with a soft external mode, and consider all possible scalar and tensor combinations for the hard-momentum modes. In all these cases, we check the consistency relations up to and including cubic order in the soft momentum. For this purpose, we compute for the first time the 3-point functions involving 2 scalars and 1 tensor, as well as 2 tensors and 1 scalar, for arbitrary sound speed.

  8. Non-Trivial Checks of Novel Consistency Relations

    CERN Document Server

    Berezhiani, Lasha; Wang, Junpu

    2014-01-01

    Single-field perturbations satisfy an infinite number of consistency relations constraining the squeezed limit of correlation functions at each order in the soft momentum. These can be understood as Ward identities for an infinite set of residual global symmetries, or equivalently as Slavnov-Taylor identities for spatial diffeomorphisms. In this paper, we perform a number of novel, non-trivial checks of the identities in the context of slow-roll single field inflationary models with arbitrary sound speed. We focus for concreteness on identities involving 3-point functions with a soft external mode, and consider all possible scalar and tensor combinations for the hard-momentum modes. In all these cases, we check the consistency relations up to and including cubic order in the soft momentum. For this purpose, we compute for the first time the 3-point functions involving 2 scalars and 1 tensor, as well as 2 tensors and 1 scalar, for arbitrary sound speed.

  9. Nonlinear smoothing identification algorithm with application to data consistency checks

    Science.gov (United States)

    Idan, M.

    1993-01-01

    A parameter identification algorithm for nonlinear systems is presented. It is based on smoothing test data with successively improved sets of model parameters. The smoothing, which is iterative, provides all of the information needed to compute the gradients of the smoothing performance measure with respect to the parameters. The parameters are updated using a quasi-Newton procedure, until convergence is achieved. The advantage of this algorithm over standard maximum likelihood identification algorithms is the computational savings in calculating the gradient. This algorithm was used for flight-test data consistency checks based on a nonlinear model of aircraft kinematics. Measurement biases and scale factors were identified. The advantages of the presented algorithm and model are discussed.

  10. Current Status Of Velocity Field Surveys: A Consistency Check

    CERN Document Server

    Sarkar, D; Watkins, R; Sarkar, Devdeep; Feldman, Hume A.

    2006-01-01

    We present a statistical analysis comparing the bulk--flow measurements for six recent peculiar velocity surveys, namely, ENEAR, SFI, RFGC, SBF and the Mark III singles and group catalogs. We study whether the bulk--flow estimates are consistent with each other and construct the full three dimensional bulk--flow vectors. The method we discuss could be used to test the consistency of all velocity field surveys. We show that although these surveys differ in their geometry and measurement errors, their bulk flow vectors are expected to be highly correlated and in fact show impressive agreement in all cases. Our results suggest that even though the surveys we study target galaxies of different morphology and use different distance measures, they all reliably reflect the same underlying large-scale flow.

  11. Consistency check of photon beam physical data after recommissioning process

    Science.gov (United States)

    Kadman, B.; Chawapun, N.; Ua-apisitwong, S.; Asakit, T.; Chumpu, N.; Rueansri, J.

    2016-03-01

    In radiotherapy, medical linear accelerator (Linac) is the key system used for radiation treatments delivery. Although, recommissioning was recommended after major modification of the machine by AAPM TG53, but it might not be practical in radiotherapy center with heavy workloads. The main purpose of this study was to compare photon beam physical data between initial commissioning and recommissioning of 6 MV Elekta Precise linac. The parameters for comparing were the percentage depth dose (PDD) and beam profiles. The clinical commissioning test cases followed IAEA-TECDOC-1583 were planned on REF 91230 IMRT Dose Verification Phantom by Philips’ Pinnacle treatment planning system. The Delta4PT was used for dose distribution verification with 90% passing criteria of the gamma index (3%/3mm). Our results revealed that the PDDs and beam profiles agreed within a tolerance limit recommended by TRS430. Most of the point doses and dose distribution verification passed the acceptance criteria. This study showed the consistency of photon beam physical data after recommissioning process. There was a good agreement between initial commissioning and recommissioning within a tolerance limit, demonstrated that the full recommissioning process might not be required. However, in the complex treatment planning geometry, the initial data should be applied with great caution.

  12. The Complexity of Checking Consistency of Pedigree Information and Related Problems

    Institute of Scientific and Technical Information of China (English)

    Luca Aceto; Jens A. Hansen; Anna Ingólfsdóttir; Jacob Johnsen; John Knudsen

    2004-01-01

    Consistency checking is a fundamental computational problem in genetics. Given a pedigree and information on the genotypes (of some) of the individuals in it, the aim of consistency checking is to determine whether these data are consistent with the classic Mendelian laws of inheritance. This problem arose originally from the geneticists' need to filter their input data from erroneous information, and is well motivated from both a biological and a sociological viewpoint. This paper shows that consistency checking is NP-complete, even with focus on a single gene and in the presence of three alleles. Several other results on the computational complexity of problems from genetics that are related to consistency checking are also offered. In particular, it is shown that checking the consistency of pedigrees over two alleles, and of pedigrees without loops, can be done in polynomial time.

  13. Monitoring time property in time-sensitive LSC

    Institute of Scientific and Technical Information of China (English)

    Haiyang Xu; Yi Zhuang; Jingjing Gu

    2015-01-01

    In order to accurately describe the software require-ments and automatical y extract property formulas, the time prop-erty of the live sequence chart (LSC) is focused. For the time-sensitive LSC (TLSC), the formal syntax and semantic are defined by introducing the formal definitions of clock and timing constraints. The main function of the TLSC is to extract the temporal logic formula, so basic rules and combination rules are proposed to translate the TLSC into the universal fragment of computation tree logic (CTL) formula. To improve the efficiency of model check, transitivity is also used to optimize the formula. The optimization method could reduce the size of the formula under the condition of equivalence. Final y, a case study is introduced to il ustrate how to establish the TLSC of requirements. In terms of the proposed transformation rules, the time property formula is extracted from the TLSC, and the design model is assured which is consistent with the property formula. The results show that the method with respect to the automatic extraction of the logic formula from the TLSC can efficiently monitor the time property of software systems.

  14. Numerical consistency check between two approaches to radiative corrections for neutrino masses and mixings

    Indian Academy of Sciences (India)

    Mrinal Kumar Das; Mahadev Patgiri; N Nimai Singh

    2005-12-01

    We briefly outline the two popular approaches on radiative corrections to neutrino masses and mixing angles, and then carry out a detailed numerical analysis for a consistency check between them in MSSM. We find that the two approaches are nearly consistent with a discrepancy factor of 4.2% with running vacuum expectation value (VEV) (13% for scale-independent VEV) in mass eigenvalues at low-energy scale but the predictions on mixing angles are almost consistent. We check the stability of the three types of neutrino models, i.e., hierarchical, inverted hierarchical and degenerate models, under radiative corrections, using both approaches, and find consistent conclusions. The neutrino mass models which are found to be stable under radiative corrections in MSSM are the normal hierarchical model and the inverted hierarchical model with opposite CP parity. We also carry out numerical analysis on some important conjectures related to radiative corrections in the MSSM, viz., radiative magnification of solar and atmospheric mixings in the case of nearly degenerate model having same CP parity (MPR conjecture) and radiative generation of solar mass scale in exactly two-fold degenerate model with opposite CP parity and non-zero 3 (JM conjecture). We observe certain exceptions to these conjectures. We find a new result that both solar mass scale and 3 can be generated through radiative corrections at low energy scale. Finally the effect of scale-dependent vacuum expectation value in neutrino mass renormalisation is discussed.

  15. Toward a consistency cross-check of eddy covariance flux–based and biometric estimates of ecosystem carbon balance

    DEFF Research Database (Denmark)

    Luyssaert, S.; Reichstein, M.; Schulze, E.-D.

    2009-01-01

    ) estimates with biometric measurements of net primary production (NPP), autotrophic (Ra) and heterotrophic (Rh) respiration. The test starts with closing the CO2 balance to account for reasonable errors in each of the component fluxes. Failure to do so within the constraints will classify the flux estimates....... An inconsistent ratio is not necessarily incorrect but provides a signal for careful data screening that may require further analysis to identify the possible biological reasons of the unexpected ratios. We reviewed the literature and found 16 sites, out of a total of 529 research forest sites, that met the data...... requirements for the consistency test. Thirteen of these sites passed both steps of the consistency cross-check. Subsequently, flux ratios (NPP/GPP, Rh/NPP, Rh/Re, and Re/GPP) were calculated for the consistent sites. Similar ratios were observed at sites which lacked information to check consistency...

  16. Variational Average-Atom in Quantum Plasmas (VAAQP) - A check of thermodynamic consistency

    Science.gov (United States)

    Piron, R.; Blenski, T.; Cichocki, B.

    2009-12-01

    A new code called VAAQP (Variational Average-Atom in Quantum Plasmas) is presented. The conceptual model on which the code is based, as well as the important results of previous studies are briefly discussed. The code is based on a new fully variational model of equilibrium dense plasmas employing a quantal treatment of all electrons. VAAQP can calculate the Average-Atom structure and the mean ionization from the variational equations satisfying the virial theorem and without imposing the neutrality of the Wigner-Seitz sphere. The formula obtained for the electron pressure is simple and does not require any numerical differentiation. A description of the principal features of the code is given. The thermodynamic consistency of the results obtained with VAAQP is shown by a comparison with another approach for the aluminium 2 eV isotherm. An initial comparison to an INFERNO-type model is also presented.

  17. 75 FR 42786 - Accounting Guide for LSC Recipients (2010 Edition)

    Science.gov (United States)

    2010-07-22

    ... Accounting Guide for LSC Recipients (2010 Edition) AGENCY: Legal Services Corporation. ACTION: Notice. SUMMARY: The Legal Services Corporation (LSC) is revising the Accounting Guide for LSC Recipients to reflect changes that have occurred since the last publication of the Accounting Guide (the ``Guide'') in...

  18. Global consistency check of AIRS and IASI total CO2 column concentrations using WDCGG ground-based measurements

    Science.gov (United States)

    Diao, Anyuan; Shu, Jiong; Song, Ci; Gao, Wei

    2017-03-01

    This article describes a global consistency check of CO2 satellite retrieval products from the Atmospheric Infrared Sounder (AIRS) and Infrared Atmospheric Sounding Interferometer (IASI) using statistical analysis and data from the World Data Centre for Greenhouse Gases (WDCGG). We use the correlation coefficient (r), relative difference (RD), root mean square errors (RMSE), and mean bias error (MBE) as evaluation indicators for this study. Statistical results show that a linear positive correlation between AIRS/IASI and WDCGG data occurs for most regions around the world. Temporal and spatial variations of these statistical quantities reflect obvious differences between satellite-derived and ground-based data based on geographic position, especially for stations near areas of intense human activities in the Northern Hemisphere. It is noteworthy that there appears to be a very weak correlation between AIRS/IASI data and ten groundbased observation stations in Europe, Asia, and North America. These results indicate that retrieval products from the two satellite-based instruments studied should be used with great caution.

  19. 75 FR 6816 - Attorneys' Fees; Fee-Generating Cases; Use of Non-LSC Funds, Transfers of LSC Funds, Program...

    Science.gov (United States)

    2010-02-11

    ... retaining fees more often than they have since 1996, the provision on accounting for and use of attorneys... on attorneys' fees in LSC's FY 2010 appropriation legislation. LSC is also moving provisions on accounting for and use of attorneys' fees and acceptance of reimbursements from clients from Part 1642...

  20. A new rapid method in LSC measuring technique; Neue Schnellmethode in der LSC-Messtechnik

    Energy Technology Data Exchange (ETDEWEB)

    Frenzel, Eberhard [FCI - Frenzel Consulting and Instruments, Straubenhardt (Germany); Kossert, Karsten [Physikalisch-Technische Bundesanstalt, Braunschweig (Germany); Oikari, Timo [Hidex Oy, Turku (Finland); Otto, Roland [LUFA-ITL GmbH, Kiel (Germany); Wisser, Sascha [FCI - Frenzel Consulting and Instruments, Mainz (Germany)

    2013-04-01

    A new rapid analysis of {sup 89}Sr/{sup 90}Sr is introduced in this paper. Samples that have been radiochemically prepared can be directly analyzed by using the TDCR technique. With the new method, {sup 89}Sr can be determined by means of TCDR-Cerenkov counting and {sup 90}Sr using TDCR-LSC. The obtained results indicate the reliability of the method even with respect to relatively short measuring times yielding deviations of less than 10 % to the reference value. The new method is able to reliably determine the ratios of {sup 89}Sr/{sup 90}Sr, which occur after a nuclear incident. (orig.)

  1. Consistency Checking of Fuzzy Evaluation Matrix for Web Quality%Web质量模糊评测矩阵的一致性判定

    Institute of Scientific and Technical Information of China (English)

    朱焱; 乔少杰

    2012-01-01

    Checking the consistency of the decision matrixes is essential but becomes very difficult in a Fuzzy Analytic Hierarchy Process(FAHP)-based Web quality assessment due to the fuzzy logic. Two approaches are analyzed in the paper, which are the value substitution with maximum degree of membership and the least-squares-method-based consistency checking. The fuzzy pair-wise comparison matrix meets the consistency requirements by applying the two methods based on key quality data. The study indicates that two techniques can simplify the discrimination of the consistency of fuzzy pair-wise comparison matrixes and ensure the rationality of the assessment and the soundness of decision result. The latter approach is more applicable.%利用模糊层次分析法(FAHP)评测Web资源质量时,模糊逻辑的引入使成对比较矩阵的一致性判别成为难点.为此,设计最大隶属度元素值替代法,分析并改进基于最小二乘法的一致性判定法.依据判别结果对不一致的模糊矩阵进行修正,直到所有模糊矩阵都满足一致性阈值.分析结果表明,2种方法均能保证Web资源质量评测过程的合理性和结果的可靠性,且后者适用性更高.

  2. A Shortened Norwegian Adaptation of the Lie Scale for Children (LSC) and the Defensiveness Scale for Children (DSC)

    Science.gov (United States)

    Haugen, Richard

    1978-01-01

    Ten items consisting of five DSC items and five LSC items were translated into Norwegian in order (a) to control the verbal anxiety responses from defensive tendencies, (b) to handle the problem of response set (the tendency to answer a questionnaire in a stereotyped way), and (c) to permit research concerning the nature of defensiveness itself.…

  3. Lexical access in Catalan Sign Language (LSC) production

    NARCIS (Netherlands)

    C. Baus; E. Gutiérrez-Sigut; J. Quer; M. Carreiras

    2008-01-01

    This paper investigates whether the semantic and phonological levels in speech production are specific to spoken languages or universal across modalities. We examined semantic and phonological effects during Catalan Signed Language (LSC: Llengua de Signes Catalana) production using an adaptation of

  4. 77 FR 27801 - Request for Comments-LSC Budget Request for FY 2014

    Science.gov (United States)

    2012-05-11

    ... Corporation (``LSC'' or ``Corporation'') is to promote equal access to justice in our Nation and to provide... may be found at www.lsc.gov . Dated: May 7, 2012. Victor M. Fortuno, Vice President & General...

  5. 76 FR 55710 - Sunshine Act Meeting of LSC Board of Directors Finance Committee

    Science.gov (United States)

    2011-09-08

    ... Sunshine Act Meeting of LSC Board of Directors Finance Committee TIME AND DATE: The Legal Services Corporation (``LSC'' or ``Corporation'') Board of Directors (``Board'') Finance Committee will meet...: Finance Committee Agenda Open Session 1. Approval of agenda. 2. Consider and act on LSC Management's...

  6. 45 CFR Appendix to Part 1626 - Alien Eligibility for Representation by LSC Programs

    Science.gov (United States)

    2010-10-01

    ... 45 Public Welfare 4 2010-10-01 2010-10-01 false Alien Eligibility for Representation by LSC... SERVICES CORPORATION RESTRICTIONS ON LEGAL ASSISTANCE TO ALIENS Pt. 1626, App. Appendix to Part 1626—Alien Eligibility for Representation by LSC Programs Alien Eligibility for Representation by LSC Programs...

  7. Non-self-absorbing materials for Luminescent Solar Concentrators (LSC)

    Science.gov (United States)

    Saraidarov, T.; Levchenko, V.; Grabowska, A.; Borowicz, P.; Reisfeld, R.

    2010-05-01

    The diheptyl-bipyridyl-diol, as a non-self-absorbing fluorescent compound characterized by a large separation between absorption and fluorescence bands, has been incorporated in polyvinyl-butyral film. Steady state luminescence and lifetime were measured. An increase of luminescence intensity by about 34% in the presence of silver nanoparticles was observed. No appreciable changes were found in the corresponding lifetimes. The system is proposed as a potential candidate for increasing the LSC efficiency.

  8. Interface Consistency

    DEFF Research Database (Denmark)

    Staunstrup, Jørgen

    1998-01-01

    This paper proposes that Interface Consistency is an important issue for the development of modular designs. Byproviding a precise specification of component interfaces it becomes possible to check that separately developedcomponents use a common interface in a coherent matter thus avoiding a very...... significant source of design errors. Awide range of interface specifications are possible, the simplest form is a syntactical check of parameter types.However, today it is possible to do more sophisticated forms involving semantic checks....

  9. Direct LSC method for measurements of biofuels in fuel.

    Science.gov (United States)

    Krištof, Romana; Logar, Jasmina Kožar

    2013-07-15

    Direct liquid scintillation counting (LSC) for quantification of biofuels content in fuels was implemented and validated on three liquid fossil fuel matrices-ethanol, gasoline and diesel. Fatty acid methyl esters (FAMEs), hydrogenated vegetable oils (HVO) and bio-ethanol were used as biofuels. The method is applicable in the range up to 100% for all tested combinations of bio components. The sensitivity and precision of the method are suitable for determination of bio component content in the blends which is appearing on the global market. The method does not require special equipment for sample preparation. Copyright © 2013 Elsevier B.V. All rights reserved.

  10. The LSC Glitch Group : Monitoring Noise Transients during the fifth LIGO Science Run

    CERN Document Server

    Blackburn, L; Caride, S; Caudill, S; Chatterji, S; Christensen, N; Dalrymple, J; Desai, S; Di Credico, A; Ely, G; Garofoli, J; Goggin, L; González, G; Gouaty, R; Gray, C; Gretarsson, A; Hoak, D; Isogai, T; Katsavounidis, E; Kissel, J; Klimenko, S; Mercer, R A; Mohapatra, S; Mukherjee, S; Raab, F; Riles, K; Saulson, P; Schofield, R; Shawhan, P; Slutsky, J; Smith, J R; Stone, R; Vorvick, C; Zanolin, M; Zotov, N; Zweizig, J

    2008-01-01

    The LIGO Scientific Collaboration (LSC) glitch group is part of the LIGO detector characterization effort. It consists of data analysts and detector experts who, during and after science runs, collaborate for a better understanding of noise transients in the detectors and provide a link between the commissioning teams and the astrophysical analysis. Goals of the glitch group during the fifth LIGO science run (S5) included (1) offline assessment of the detector data quality, with focus on noise transients, (2) veto recommendations for astrophysical analysis and (3) feedback to the commissioning team on anomalies seen in gravitational wave and auxiliary data channels. These goals were achieved through off-site data analysis shifts, where loud transients found by gravitational wave search algorithms were examined with customized event visualization tools. Other activities included the study of auto-correlation of triggers from burst searches, stationarity of the detector noise and veto studies. This article shal...

  11. A Study of the Effects of a LSC Project on Scientists' Teaching Practices and Beliefs

    Science.gov (United States)

    Ballone-Duran, Lena; Czerniak, Charlene M.; Haney, Jodi J.

    2005-05-01

    The purpose of this study was to examine the influence of a local systemic change (LSC) project on scientists’ practices and beliefs about teaching and learning. A mixed-method design was implemented that consisted of a series of interviews and the administration of the Classroom Learning Environment Survey (paper presented at the annual meeting of the National Association for Research in Science Teaching, Anaheim, CA, 1994). Results from this study suggest that collaborative opportunities afforded by this model program have positively influenced scientists’ beliefs about teaching elementary science and may be impacting some of the scientists’ pedagogical and curricular practices in their general education courses. Many scientists have developed new collaborative projects, all intended to improve science education at the graduate and undergraduate level, and are beginning to understand the complexity of science education reform.

  12. 75 FR 56580 - Sunshine Act Meeting of LSC Board of Directors and Its Finance Committee

    Science.gov (United States)

    2010-09-16

    ... Sunshine Act Meeting of LSC Board of Directors and Its Finance Committee TIME AND DATE: The Legal Services Corporation (``LSC'' or ``Corporation'') Board of Directors (``Board'') and its Finance Committee will meet consecutively on September 21, 2010, with the Finance Committee convening at 10 a.m., Eastern Time, and...

  13. 75 FR 5351 - Proposed Revisions to Accounting Guide for LSC Recipients

    Science.gov (United States)

    2010-02-02

    ... the Accounting Guide for LSC Recipients. The Guide sets forth LSC's accounting, financial management... incorporate: (1) New internal control provisions for electronic banking transactions; (2) financial oversight concepts from the Sarbanes Oxley Act of 2002; (3) references to the accounting standards codification by...

  14. The service oriented virtual enterprise model and its consistency checking mechanism%面向服务的虚拟企业模型及其一致性检查机制

    Institute of Scientific and Technical Information of China (English)

    王伟然; 范玉顺

    2011-01-01

    To meet the requirements for enterprise modeling of business operation of service oriented virtual enterprises, the service oriented virtual enterprise model ( SOVEM) is presented, and its consistency checking mechanism is given. On the basis of analyzing the business mode and characteristics of service oriented virtual enterprises, the conceptual model and the formalized definition of the SOVEM is proposed, and the modeling process and the mapping method for member enterprise models are analyzed. Then the consistency checking mechanism of the model is discussed, the consistency constrains of the model are defined, and the algorithms for consistency checking are proposed. The feasibility and effectiveness of the model and its consistency checking mechanism are proved through the implementation of a prototype modeling system and practical testing. The model focuses on the service oriented business mode, reflects the features of networked manufacturing, and provides consistent, total-range and multi-view integrated description for service oriented virtual enterprises, so as to support their construction and operation.%针对面向服务的虚拟企业业务运作对企业建模的需求,提出了面向服务的虚拟企业模型(SOVEM),并研究了其一致性检查机制.在分析面向服务的虚拟企业业务模式及其特点的基础上,提出了SOVEM的概念模型和形式化定义,讨论了其建模过程和成员企业模型映射方法,继而讨论了模型的一致性检查机制,定义了一致性约束并给出了模型验证算法,以保证模型的有效性,并且通过面向服务的虚拟企业建模原型系统的实现和实例检验验证了SOVEM及其一致性检查机制的可行性和有效性.该模型着眼于面向服务的业务模式,反映了网络化制造的特点,可为面向服务的虚拟企业提供一致的、全范围、多视图的集成化描述,以支持其构建和运行.

  15. Pi of the Sky involvement in LSC-Virgo electromagnetic follow-up project

    Science.gov (United States)

    ZadroŻny, Adam; Sokołowski, Marcin; Mankiewicz, Lech; Żarnecki, Aleksander Filip

    2016-09-01

    Pi of the Sky took part in LSC-Virgo's Electromagnetic (EM) Follow-up project during first science run of Advanced LIGO detectors between September 2015 and January 2016. More than 60 astronomical teams have signed Memorandum-of-Understanding with LSC-Virgo for EM Follow-up project. LSC-Virgo's EM Follow-up is aimed for searching electromagnetic counterparts to gravitational wave transient candidates. Observing an event both in EM and gravitational wave band might be a important step forward to multi-messenger astronomy. The aim of this paper is to show algorithms used by Pi of the Sky for analysing data taken during the science runs.

  16. 78 FR 32474 - Request for Comments: LSC Appropriations Request for FY 2015

    Science.gov (United States)

    2013-05-30

    ... Corporation, 3333 K Street NW., Washington, DC 20007; 202-337-6834 (fax); or david.richardson@lsc.gov . FOR FURTHER INFORMATION CONTACT: David L. Richardson, Treasurer, Legal Services Corporation, 3333 K Street...

  17. Automated Consistency Checking of Requirements Specifications

    Science.gov (United States)

    1996-07-01

    tool analyzes properties of the mode transition tables only. 6.7 Detecting Errors by Inspection A recent experiment [Porter and Votta 1994] compares the...nuclear power plants. Nucl. Safety 32, 2 (Apr.–June), 189–198. PORTER, A. A. AND VOTTA , L. G., JR. 1994. An experiment to assess different defect detection

  18. Checking Content Consistency of Integrated Web Documents

    Institute of Scientific and Technical Information of China (English)

    Franz Weitl; Burkhard Freitag

    2006-01-01

    A conceptual framework for the specification and verification of constraints on the content and narrative structure of documents is proposed. As a specification formalism, CTLDL is defined, which is an extension of the temporal logic CTL by description logic concepts. In contrast to existing solutions this approach allows for the integration of ontologies to achieve interoperability and abstraction from implementation aspects of documents. This makes CTLDL specifically suitable for the integration of heterogeneous and distributed information resources in the semantic web.

  19. Determination of total alpha and beta activity in water for human consumption by LSC(Liquid Scintillation Counter); Determinacao de atividades alfa e beta total em agua para consumo humano por LSC (Contador de Cintilacao Liquida))

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2013-07-01

    The Ordinance Brazilian of Ministry of Health (MS 2914/2011) establishes the standards for quality of water intended for human consumption, being limits values of 5.0 Bq/L for gross alpha, and 1.0 Bq/L for gross beta radioactivity. The liquid scintillation spectrometry (LSC) technique has been presented as an alternative to conventional procedure using gas flow proportional counter. The present work shows a review of the methods for determination of gross alpha and gross beta in water by using LSC. Between the factors that influence the accuracy and repeatability of the analytical results we can highlight: thermal preconcentration, type of the acid and calibration standard. A procedure was established and carried out to samples of the National Program of Intercomparison of Radionuclides in Environmental Samples for evaluation of its performance. The gross alpha and gross beta analysis in samples of the public water supplies in the Metropolitan Region of Goiania, state of Goias was carried out. The results are consistent with the guideline values form the Ministry of Health concerning radioactivity. (author)

  20. Study on Optimization Setting and Accuracy Test of the PSA Value for 1220 QuantulusTM LSC%1220 QuantulusTM PSA值优化设置及其准确性检验实验研究

    Institute of Scientific and Technical Information of China (English)

    安小刚; 唐泉; 丘寿康; 李连山; 李文涛

    2014-01-01

    介绍了1220 Quantulus型液闪谱仪的PSA值优化设置方法及准确性检验方法。通过实验确定了此仪器的最优PSA值,并利用3 H、14 C标准源对其准确性进行了检验。结果表明使用优化了PSA值的Alpha/Beta配置测量3 H、14 C时,与谱仪默认配置测量结果相一致。为使用Alpha/Beta配置进行β放射性核素测量研究提供参考。%This paper describes the methodes of optimization setting and accuracy test of the PSA value for 1220 QuantulusTM LSC. The optimization PSA value has been determined and the accuracy has been checked using3 H/ 14 C standard sources. The results show that the measurement results were consistent when using Alpha/Beta setup under the optimiza-tion setting and default setup to measure3 H/ 14 C. It provides some references to measure be-ta radionuclide using Alpha/Beta setup.

  1. A Method for Checking Consistency Between Domain Requirements and Business Process%一种面向领域需求与业务流程间一致性的检测方法

    Institute of Scientific and Technical Information of China (English)

    柳金杜; 沈立炜; 彭鑫; 赵文耘

    2013-01-01

    BPMN is a business process modeling standards commonly used in the field of software development.In the software product line with process variability,BPMN process templates support to descript business process from domain requirements,and derive process instance towards particular application requirements effectively.However,there always exist inconsistency between domain requirements and business process templates.For this problem,this paper presents a method for model checking consistency between domain requirements and business process,which descript domain requirements as FLTL properties,translate BPMN instance to FSP expression,and check the inconsistency using an automated model checking tool which will send back the result.%BPMN是软件开发领域中较为常用的描述业务流程的建模标准.在包含业务流程可变性的软件产品线中,基于BPMN的业务流程模板可支持针对领域需求的业务流程描述,并且能够高效地生成面向特定应用需求的业务流程实例.然而,领域需求与业务流程模板之间往往存在不一致情况.针对该问题,提出一种面向领域需求与业务流程一致性的模型检测方法,该方法使用变数线性时态逻辑(FLT[L)描述领域需求,同时使用状态进程公式(FSP)描述BPMN实例,在持续的迭代过程中使用自动化模型检测工具发现领域需求与业务流程之间的不一致,并将其反馈给相关人员实施修正.

  2. Model Checking Feature Interactions

    DEFF Research Database (Denmark)

    Le Guilly, Thibaut; Olsen, Petur; Pedersen, Thomas;

    2015-01-01

    This paper presents an offline approach to analyzing feature interactions in embedded systems. The approach consists of a systematic process to gather the necessary information about system components and their models. The model is first specified in terms of predicates, before being refined to t...... to timed automata. The consistency of the model is verified at different development stages, and the correct linkage between the predicates and their semantic model is checked. The approach is illustrated on a use case from home automation....

  3. Transaction management with integrity checking

    DEFF Research Database (Denmark)

    Martinenghi, Davide; Christiansen, Henning

    2005-01-01

    , which are difficult to maintain and error prone. Two important aspects must be taken care of. 1.~It is too time consuming to check integrity constraints from scratch after each update, so simplified checks before each update should be used relying on the assumption that the current state is consistent...

  4. 76 FR 48904 - Request for Comments-Poverty Data and LSC Funding Distribution

    Science.gov (United States)

    2011-08-09

    ... Request for Comments--Poverty Data and LSC Funding Distribution AGENCY: Legal Services Corporation. ACTION...-defined geographic areas so as to provide an equal figure per individual in poverty for each geographic area. The appropriation has further mandated that the number of individuals in poverty in...

  5. System engineering and design of LSC-PV for outdoor lighting applications

    NARCIS (Netherlands)

    Viswanathan, B.; Reinders, A.H.M.E.; De Boer, D.K.G.; Ras, A.; Zahn, H.; Desmet, L.

    2012-01-01

    Solar photovoltaic outdoor lighting applications usually comprise flat plate PV modules mounted on top of a light pole. In our paper instead, it is thought of to design the light pole as a luminescent solar concentrator photovoltaic (LSC-PV) module with solar cell strips and hence reduce costs of

  6. System engineering and design of LSC-PV for outdoor lighting applications

    NARCIS (Netherlands)

    Viswanathan, B.; Reinders, A.H.M.E.; De Boer, D.K.G.; Ras, A.; Zahn, H.; Desmet, L.

    2012-01-01

    Solar photovoltaic outdoor lighting applications usually comprise flat plate PV modules mounted on top of a light pole. In our paper instead, it is thought of to design the light pole as a luminescent solar concentrator photovoltaic (LSC-PV) module with solar cell strips and hence reduce costs of si

  7. Determination of total alpha and beta activities on vegetable samples by LSC; Determinacao de atividades alfa total e beta total em amostras vegetais por LSC

    Energy Technology Data Exchange (ETDEWEB)

    Nogueira, Regina Apolinaria; Santos, Eliane Eugenia dos; Bakker, Alexandre Pereira [Centro Regional de Ciencias Nucleares do Centro-Oeste (CRCN-CO/CNEN-GO), Abadia de Goias, GO (Brazil); Vavassori, Giullia [Centro Regional de Ciencias Nucleares do Centro-Oeste (CRCN-CO/CNEN-GO), Abadia de Goias, GO (Brazil); Pontificia Universidade Catolica de Goias (PUC-GO), Goiania, GO (Brazil). Dept. de Engenharia, Engenharia Ambiental; Mingote, Raquel Maia [Centro Regional de Ciencias Nucleares do Centro-Oeste (CRCN-CO/CNEN-GO), Abadia de Goias, GO (Brazil); Universidade Federal de Minas Gerais (DEN/UFMG), Belo Horizonte, MG (Brazil)

    2011-07-01

    Gross alpha and beta analyses are screening techniques used for environmental radioactivity monitoring. The present study proposes to determine the gross alpha and beta activities in vegetable samples by using LSC - liquid scintillation spectrometry. The procedure was applied to vegetable foods. After ashing vegetable samples in a muffle furnace, 100 mg of ash were added to gel mixture of scintillation cocktails, Water - Instagel - Ultima Gold AB (6:10:4) ml, in polyethylene vial. Am-241 standard solution and a KCl (K-40) solution were used to determine the counting configuration, alpha/beta efficiencies and spillover

  8. Fundarvid y Fenascol: notas sobre sus neologismos en la formación de la LSC

    Directory of Open Access Journals (Sweden)

    Alex G. Barreto-Muñoz

    2015-12-01

    Full Text Available En Colombia existe un debate abierto sobre cómo las personas sordas deberían crear nuevas palabras (neologismos en el lengua de señas colombiana (LSC. Las propuestas de la Fundación Árbol de Vida han generado diversas tensiones al interior de la comunidad sorda bogotana asociada a la Federación Nacional de Sordos de Colombia, en particular sobre un elemento que poco ha sido explorado: la adquisición, enseñanza y aprendizaje de la LSC, lo que se ha optado aquí englobar como ‘formación’. El presente artículo, presenta los avances de dos investigaciones realizadas por el autor que detallan la complejidad de las prácticas sociales de las personas sordas frente las polémicas en torno a la innovación en la lsc y su interrelación con las creencias en torno al ideal de lengua.

  9. Get Your Cholesterol Checked

    Science.gov (United States)

    ... Checked Print This Topic En español Get Your Cholesterol Checked Browse Sections The Basics Overview Cholesterol Test ... How often do I need to get my cholesterol checked? The general recommendation is to get your ...

  10. 76 FR 3926 - Notice and Request for Comments: LSC Elimination of the Nevada, South Dakota, and Wyoming Migrant...

    Science.gov (United States)

    2011-01-21

    ... Services Corporation, 3333 K St., NW., Washington, DC 20007; or haleyr@lsc.gov . FOR FURTHER INFORMATION CONTACT: Reginald J. Haley, Office of Program Performance, Legal Services Corporation, 3333 K St.,...

  11. Regular health checks

    DEFF Research Database (Denmark)

    Grønhøj Larsen, Christian; Jørgensen, Karsten Juhl; Gøtzsche, Peter C

    2012-01-01

    To investigate whether Danish providers of general health checks present a balanced account of possible benefits and harms on their websites and whether the health checks are evidence-based.......To investigate whether Danish providers of general health checks present a balanced account of possible benefits and harms on their websites and whether the health checks are evidence-based....

  12. Automating checks of plan check automation.

    Science.gov (United States)

    Halabi, Tarek; Lu, Hsiao-Ming

    2014-07-08

    While a few physicists have designed new plan check automation solutions for their clinics, fewer, if any, managed to adapt existing solutions. As complex and varied as the systems they check, these programs must gain the full confidence of those who would run them on countless patient plans. The present automation effort, planCheck, therefore focuses on versatility and ease of implementation and verification. To demonstrate this, we apply planCheck to proton gantry, stereotactic proton gantry, stereotactic proton fixed beam (STAR), and IMRT treatments.

  13. Determination of {sup 55}Fe in waste waters of the Krsko nuclear power plant measured simultaneously by liquid scintillation spectrometer (LSC) and X-ray spectrometer (XRS)

    Energy Technology Data Exchange (ETDEWEB)

    Mikelic, L. [Rudjer Boskovic Institute, Laboratory for Radioecology, Bijenicka Cesta 54, 10000 Zagreb (Croatia)], E-mail: lmikelic@irb.hr; Orescanin, V.; Lulic, S. [Rudjer Boskovic Institute, Laboratory for Radioecology, Bijenicka Cesta 54, 10000 Zagreb (Croatia)

    2007-10-15

    This paper presents comparison of two methods for the determination of {sup 55}Fe activity of waste waters discharged from the Krsko nuclear power plant (KNPP). Research was conducted on 12 composite samples of waste water collected in the waste monitor tank (WMT) during each month as well as on Analytics, Inc. cross-check sample. Results showed that the complicated and time-consuming method proposed by the Environmental Measurements Laboratory (EML) could be successfully replaced with a simple and fast based on the extraction of {sup 55}Fe from waste water by non-specific chelating agent ammonium-pyrrolidinedithiocarbamate (APDC) at pH 4 after separation from cobalt, and activity measurement by X-ray fluorescence spectroscopy (XRS). Results obtained by the XRS method were approximately 8.6% lower than those obtained by liquid scintillation spectrometer (LSC). The mean deviation of the XRS results from the activity of cross-check sample was 2.47%, which ensures that this method is accurate enough for environmental monitoring.

  14. Determination of 55Fe in waste waters of the Krsko nuclear power plant measured simultaneously by liquid scintillation spectrometer (LSC) and X-ray spectrometer (XRS)

    Science.gov (United States)

    Mikelic, L.; Orescanin, V.; Lulic, S.

    2007-10-01

    This paper presents comparison of two methods for the determination of 55Fe activity of waste waters discharged from the Krsko nuclear power plant (KNPP). Research was conducted on 12 composite samples of waste water collected in the waste monitor tank (WMT) during each month as well as on Analytics, Inc. cross-check sample. Results showed that the complicated and time-consuming method proposed by the Environmental Measurements Laboratory (EML) could be successfully replaced with a simple and fast based on the extraction of 55Fe from waste water by non-specific chelating agent ammonium-pyrrolidinedithiocarbamate (APDC) at pH 4 after separation from cobalt, and activity measurement by X-ray fluorescence spectroscopy (XRS). Results obtained by the XRS method were approximately 8.6% lower than those obtained by liquid scintillation spectrometer (LSC). The mean deviation of the XRS results from the activity of cross-check sample was 2.47%, which ensures that this method is accurate enough for environmental monitoring.

  15. Procesos de lexicalización en la LSC: Procedimientos de combinación

    Directory of Open Access Journals (Sweden)

    Maria-Josep Jarque Moyano

    2013-01-01

    Full Text Available En este trabajo se describen los diferentes procedimientos formales de combinación para la creación léxica en la lengua de signos catalana (LSC, así como el papel fundamental de la metáfora y la metonimia conceptuales en su motivación original. Para ello se caracterizan los distintos procesos de lexicalización formal y semántica dentro de un continuo de agrupaciones léxicas fijas: colocaciones, compuestos sintagmáticos, locuciones y compuestos léxicos.

  16. Procesos de lexicalización en la LSC: Procedimientos de combinación

    OpenAIRE

    Maria-Josep Jarque Moyano; Imma Cordorniu; Marta Bosch-Baliarda; Mª del Pilar Fernández-Viader; Carlos García; Encarna Serrano; Segimon, Josep M.

    2012-01-01

    En este trabajo se describen los diferentes procedimientos formales de combinación para la creación léxica en la lengua de signos catalana (LSC), así como el papel fundamental de la metáfora y la metonimia conceptuales en su motivación original. Para ello se caracterizan los distintos procesos de lexicalización formal y semántica dentro de un continuo de agrupaciones léxicas fijas: colocaciones, compuestos sintagmáticos, locuciones y compuestos léxicos.

  17. Creep deformation behaviour of Rhenium free Ni-based single crystal superalloys LSC-15

    Directory of Open Access Journals (Sweden)

    Tsuno Nobuyasu

    2014-01-01

    Full Text Available In this paper, creep deformation behavior of Ni-based single crystal superalloys LSC-15 were studied. LSC-15 does not include Rhenium and has been developed by IHI Corporation Japan. Creep tests were performed at 1000 and 1050 ∘C under several stress levels. The creep deformation behaviour was different between test temperatures at 1000 ∘C and 1050 ∘C. Moreover, the relationship between the minimum creep rate and stress was different at the various temperatures. The stress exponent values at 1000 ∘C and 1050 ∘C, were n = 6 and 12 respectively. This difference was due to differences in the formation of dislocation network. At 1000 ∘C, when the minimum creep rate, the dislocation network formed completely independent of stress level. On the other hand, at 1050 ∘C, the dislocation network had not developed fully at the minimum creep rate and the formation of dislocation network depended on the stress level. Therefore, stress dependency at 1050 ∘C is higher than that at 1000 ∘C.

  18. Fixed energy balance window quench correction for high precision LSC {sup 14}C dating

    Energy Technology Data Exchange (ETDEWEB)

    Tudyka, Konrad, E-mail: konrad.tudyka@polsl.pl [GADAM Centre of Excellence Gliwice Absolute Dating Methods Centre, Silesian University of Technology, Krzywoustego 2, 44-100 Gliwice (Poland); Pawlyta, Jacek; Pazdur, Anna [GADAM Centre of Excellence Gliwice Absolute Dating Methods Centre, Silesian University of Technology, Krzywoustego 2, 44-100 Gliwice (Poland)

    2011-10-15

    In this paper we present the new LSC spectra evaluation method for high precision {sup 14}C dating with Quantulus 1220{sup TM}. The generally used fixed window is replaced with the fixed energy balanced counting window. The lower and upper channel of the window in the multichannel analyzer vary according to the quench level of each individual measurement. The position of the window is determined with the external standard quench parameter SQP(E) of Quantulus 1220{sup TM}. We show how this fixed energy balance window for each sample secures high stability and reduced quench correction. This method is compared with the typically used fixed channel window. - Highlights: > In this paper we present the new LSC spectra evaluation method. > We show how to setup fixed energy balance window. > The lower and upper channel of the window vary according to the quench level of each individual measurement. > We show how fixed energy balance window secures high stability. > We show the benefits of the fixed energy balance window.

  19. Checking Java Programs

    CERN Document Server

    Darwin, Ian

    2007-01-01

    This Short Cut tells you about tools that will improve the quality of your Java code, using checking above and beyond what the standard tools do, including: Using javac options, JUnit and assertions Making your IDE work harder Checking your source code with PMD Checking your compiled code (.class files) with FindBugs Checking your program's run-time behavior with Java PathFinder

  20. Tissomics: two- and three-dimensional distribution of nuclei in brain tissue using laser scanning cytometry (LSC)

    Science.gov (United States)

    Lenz, Domnik; Mittag, Anja; Mosch, Birgit; Bocsi, Jozsef; Arendt, Thomas; Tarnok, Attila

    2005-03-01

    Automated quantitative (i.e. stochiometric) analysis of tissues is of eminent importance in the understanding of all interactions between cells in their natural environment. In tissue cytometry a solid trigger is necessary in order to unequivocally differentiate between cellular and non-cellular events. This can be best performed by nuclear staining. Aim of this study was to analyze a brain tissue section by laser scanning cytometry (LSC) in order to depict the threedimensional distribution of nuclei in the tissue. To this end the section was measured in several foci and different nuclei detected in several depths of the tissue were assigned to the respective layer. Frozen sections of formalin-fixed rat or human brain tissue (120μm thickness) were incubated with propidiumiodide (PI) (50μg/ml) and covered on slides. For analysis by the LSC propidiumiodide was used as trigger. After a first analysis focussed on the top of the tissue, the focus was adjusted in 30μm steps deeper into the tissue. Per analysis data of at least 50,000 cells were acquired. After finishing measurements from all depths of the field were merged, i.e. data were combined into a composite data file. With the special features of the LSC it was possible to develop a method depicting the threedimensional distribution of the nuclei in solid tissue sections. LSC can be useful tool for this relatively new field of solid tissue cytometry termed tissomics. After evaluation of methods like this, so far not available data can be analysed for diagnostic purposes. By these studies we intend to demonstrate the power of the LSC for the routine pathological use. This should add up to the bright versatility of applications for the LSC as a cytometric instrument suitable for high throughput and high content analysis.

  1. Determination of 241Pu in nuclear waste slurries: a comparative study using LSC and ICP-MS.

    Science.gov (United States)

    Jäggi, M; Röllin, S; Alvarado, J A Corcho; Eikenberg, J

    2012-02-01

    (241)Pu was determined in slurry samples from a nuclear reactor decommissioning project at the Paul Scherrer Institute (Switzerland). To validate the results, the (241)Pu activities of five samples were determined by LSC (TriCarb and Quantulus) and ICP-MS, with each instrument at a different laboratory. In lack of certified reference materials for (241)Pu, the methods were further validated using the (241)Pu information values of two reference sediments (IAEA-300 and IAEA-384). Excellent agreement with the results was found between LSC and ICP-MS in the nuclear waste slurries and the reference sediments.

  2. Radon and environmental radioactivity in the Canfranc Underground Laboratory; Radon y radiacion ambiental en el Laboratorio Subterraneo de Canfrac (LSC)

    Energy Technology Data Exchange (ETDEWEB)

    Bandac, I.; Bettini, A.; Borjabad, S.; Nunez-Lagos, R.; Perez, C.; Rodriguez, S.; Sanchez, P.; Villar, J. A.

    2014-02-01

    The results of more than one year of measurements of Radon and environmental radioactivity in the Canfranc Underground Laboratory (LSC) are presented. Radon and atmospheric parameters have registered by an Alpha guard P30 equipment and the environmental radioactivity has been measured by means of UD-802A Panasonic thermoluminescent dosimeters (TLD) processed by an UD716 Panasonic unit. Series of results along with their possible correlations are presented. Both the Radon level and the ambient dose equivalent H (10) are much lower than the allowed ones so no radiological risk exists to persons working in the LSC. Also its excellent environmental radiological quality has been confirmed. (Author)

  3. Transaction management with integrity checking

    DEFF Research Database (Denmark)

    Martinenghi, Davide; Christiansen, Henning

    2005-01-01

    Database integrity constraints, understood as logical conditions that must hold for any database state, are not fully supported by current database technology. It is typically up to the database designer and application programmer to enforce integrity via triggers or tests at the application level......, which are difficult to maintain and error prone. Two important aspects must be taken care of. 1.~It is too time consuming to check integrity constraints from scratch after each update, so simplified checks before each update should be used relying on the assumption that the current state is consistent...

  4. Determination of {sup 90}SR in food using extraction chromatography and LSC - Liquid Scintillation Counting

    Energy Technology Data Exchange (ETDEWEB)

    Temba, Eliane S.C.; Amaral, Angela M.; Reis Junior, Aluisio S.; Monteiro, Roberto P.G., E-mail: esct@cdtn.br [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG/SERTA), Belo Horizonte, MG (Brazil). Servico de Reator e Tecnicas Analiticas

    2013-07-01

    A methodology for the determination of {sup 90}Sr in food is described. The procedure involved a preliminary freeze-drying of the samples followed by dry-ashing and sample digestion. The separation procedure was carried out using extraction chromatography with Sr Resin, from Eichrom, and {sup 90}Sr was measured by liquid scintillation counting (LSC). A certified reference material, IAEA-375, was analyzed in order to evaluate the reliability of the method, and the results showed good agreement between the measured and certified values. The chemical yield was above 90% and the typical counting efficiency was 82%. The calculated limit of detection was 4.8 x 10{sup -3} Bq g{sup -1}. (author)

  5. Linear Vlasov solver for microbunching gain estimation with inclusion of CSR, LSC and linac geometric impedances

    CERN Document Server

    Tsai, Cheng-Ying; Li, Rui; Tennant, Chris

    2015-01-01

    As is known, microbunching instability (MBI) has been one of the most challenging issues in designs of magnetic chicanes for short-wavelength free-electron lasers or linear colliders, as well as those of transport lines for recirculating or energy recovery linac machines. To more accurately quantify MBI in a single-pass system and for more complete analyses, we further extend and continue to increase the capabilities of our previously developed linear Vlasov solver [1] to incorporate more relevant impedance models into the code, including transient and steady-state free-space and/or shielding coherent synchrotron radiation (CSR) impedances, the longitudinal space charge (LSC) impedances, and the linac geometric impedances with extension of the existing formulation to include beam acceleration [2]. Then, we directly solve the linearized Vlasov equation numerically for microbunching gain amplification factor. In this study we apply this code to a beamline lattice of transport arc [3] following an upstream linac...

  6. Redesigning Introductory Science Courses to Teach Sustainability: Introducing the L(SC)2 Paradigm

    Science.gov (United States)

    Myers, J. D.; Campbell-Stone, E.; Massey, G.

    2008-12-01

    Modern societies consume vast quantities of Earth resources at unsustainable levels; at the same time, resource extraction, processing, production, use and disposal have resulted in environmental damage severe enough to threaten the life-support systems of our planet. These threats are produced by multiple, integrative and cumulative environmental stresses, i.e. syndromes, which result from human physical, ecological and social interactions with the environment in specific geographic places. In recent decades, recognition of this growing threat has lead to the concept of sustainability. The science needed to provide the knowledge and know-how for a successful sustainability transition differs markedly from the science that built our modern world. Sustainability science must balanced basic and applied research, promote integrative research focused on specific problems and devise a means of merging fundamental, general scientific principles with understanding of specific places. At the same time, it must use a variety of knowledge areas, i.e. biological systems, Earth systems, technological systems and social systems, to devise solutions to the many complex and difficult problems humankind faces. Clearly, sustainability science is far removed from the discipline-based science taught in most U.S. colleges. Many introductory science courses focus on content, lack context and do not integrate scientific disciplines. To prepare the citizens who will confront future sustainability issues as well as the scientists needed to devise future sustainability strategies, educators and scientists must redesign the typical college science course. A new course paradigm, Literacies and Scientific Content in Social Context (L(SC)2), is ideally suited to teach sustainability science. It offers an alternative approach to liberal science education by redefining and expanding the concept of the interdisciplinary course and merging it with the integrated science course. In addition to

  7. Direct Model Checking Matrix Algorithm

    Institute of Scientific and Technical Information of China (English)

    Zhi-Hong Tao; Hans Kleine Büning; Li-Fu Wang

    2006-01-01

    During the last decade, Model Checking has proven its efficacy and power in circuit design, network protocol analysis and bug hunting. Recent research on automatic verification has shown that no single model-checking technique has the edge over all others in all application areas. So, it is very difficult to determine which technique is the most suitable for a given model. It is thus sensible to apply different techniques to the same model. However, this is a very tedious and time-consuming task, for each algorithm uses its own description language. Applying Model Checking in software design and verification has been proved very difficult. Software architectures (SA) are engineering artifacts that provide high-level and abstract descriptions of complex software systems. In this paper a Direct Model Checking (DMC) method based on Kripke Structure and Matrix Algorithm is provided. Combined and integrated with domain specific software architecture description languages (ADLs), DMC can be used for computing consistency and other critical properties.

  8. Software tool for physics chart checks.

    Science.gov (United States)

    Li, H Harold; Wu, Yu; Yang, Deshan; Mutic, Sasa

    2014-01-01

    Physics chart check has long been a central quality assurance (QC) measure in radiation oncology. The purpose of this work is to describe a software tool that aims to accomplish simplification, standardization, automation, and forced functions in the process. Nationally recognized guidelines, including American College of Radiology and American Society for Radiation Oncology guidelines and technical standards, and the American Association of Physicists in Medicine Task Group reports were identified, studied, and summarized. Meanwhile, the reported events related to physics chart check service were analyzed using an event reporting and learning system. A number of shortfalls in the chart check process were identified. To address these problems, a software tool was designed and developed under Microsoft. Net in C# to hardwire as many components as possible at each stage of the process. The software consists of the following 4 independent modules: (1) chart check management; (2) pretreatment and during treatment chart check assistant; (3) posttreatment chart check assistant; and (4) quarterly peer-review management. The users were a large group of physicists in the author's radiation oncology clinic. During over 1 year of use the tool has proven very helpful in chart checking management, communication, documentation, and maintaining consistency. The software tool presented in this work aims to assist physicists at each stage of the physics chart check process. The software tool is potentially useful for any radiation oncology clinics that are either in the process of pursuing or maintaining the American College of Radiology accreditation.

  9. Symbolic model checking APSL

    Institute of Scientific and Technical Information of China (English)

    Wanwei LIU; Ji WANG; Huowang CHEN; Xiaodong MA; Zhaofei WANG

    2009-01-01

    Property specification language (PSL) is a specification language which has been accepted as an industrial standard. In PSL, SEREs are used as additional formula constructs. In this paper, we present a variant of PSL, namely APSL, which replaces SEREs with finite automata. APSL and PSL are of the exactly same expressiveness. Then, we extend the LTL symbolic model checking algorithm to that of APSL, and then present a tableau based APSL verification technique, which can be easily implemented via the BDD based symbolic approach. Moreover, we implement an extension of NuSMV, and this adapted version supports symbolic model checking of APSL. Experimental results show that this variant of PSL can be efficiently verified. Henceforth, symbolic model checking PSL can be carried out by a transformation from PSL to APSL and symbolic model checking APSL.

  10. Goat production check list

    DEFF Research Database (Denmark)

    Henriksen, Jørgen; Nielsen, Mette Benedicte Olaf; Madsen, Jørgen

    2009-01-01

    This check list, financed by DanChurchAid, highlights all issues should be carefully investigated before investing in distribution of goats and in interventions to assist poor rural communities to improve their livelihood through goat production.......This check list, financed by DanChurchAid, highlights all issues should be carefully investigated before investing in distribution of goats and in interventions to assist poor rural communities to improve their livelihood through goat production....

  11. Goat production check list

    DEFF Research Database (Denmark)

    Henriksen, Jørgen; Nielsen, Mette Benedicte Olaf; Madsen, Jørgen

    2009-01-01

    This check list, financed by DanChurchAid, highlights all issues should be carefully investigated before investing in distribution of goats and in interventions to assist poor rural communities to improve their livelihood through goat production.......This check list, financed by DanChurchAid, highlights all issues should be carefully investigated before investing in distribution of goats and in interventions to assist poor rural communities to improve their livelihood through goat production....

  12. Parallel Software Model Checking

    Science.gov (United States)

    2015-01-08

    JAN 2015 2. REPORT TYPE N/A 3. DATES COVERED 4. TITLE AND SUBTITLE Parallel Software Model Checking 5a. CONTRACT NUMBER 5b. GRANT NUMBER...AND ADDRESS(ES) Software Engineering Institute Carnegie Mellon University Pittsburgh, PA 15213 8. PERFORMING ORGANIZATION REPORT NUMBER 9...3: ∧ ≥ 10 ∧ ≠ 10 ⇒ : Parallel Software Model Checking Team Members Sagar Chaki, Arie Gurfinkel

  13. Consistency check on Z{sub eff} diagnostics

    Energy Technology Data Exchange (ETDEWEB)

    Rapp, J.; Koslowski, H.R. [Association Euratom-Forschungszentrum Juelich GmbH (Germany). Inst. fuer Plasmaphysik; Telesca, G. [Consorzio RFX, CNR, Padova (Italy); Ongena, J. [Ecole Royale Militaire, Brussels (Belgium). Lab. de Physique des Plasmas; Jaspers, R. [Associatie Euratom-FOM, Nieuwegein (Netherlands). FOM-Instituut voor Plasmafysica

    1999-09-01

    On TEXTOR three different diagnostics for the determination of the ion effective plasma charge (Z{sub eff}) are installed. All of them measure the bremsstrahlung in the visible continuum. Additionally one can derive Z{sub eff} from the plasma resistivity. The task of this investigation is to compare the different Z{sub eff} determinations in order to minimize systematic errors. For this purpose different discharge conditions, ohmic heating, auxiliary heating, low- and high density and impurity seeding were investigated. An error analysis of the specific diagnostic methods is included. (orig.)

  14. Static Consistency Checking of Web Applications with WebDSL

    NARCIS (Netherlands)

    Hemel, Z.; Groenewegen, D.M.; Kats, L.C.L.; Visser, E.

    2010-01-01

    Modern web application development frameworks provide web application developers with highlevel abstractions to improve their productivity. However, their support for static verification of applications is limited. Inconsistencies in an application are often not detected statically, but appear as

  15. Static Consistency Checking of Web Applications with WebDSL

    NARCIS (Netherlands)

    Hemel, Z.; Groenewegen, D.M.; Kats, L.C.L.; Visser, E.

    2010-01-01

    Modern web application development frameworks provide web application developers with highlevel abstractions to improve their productivity. However, their support for static verification of applications is limited. Inconsistencies in an application are often not detected statically, but appear as er

  16. Birefringent Gravitational Waves and the Consistency Check of Inflation

    Energy Technology Data Exchange (ETDEWEB)

    Alexander, S

    2004-11-30

    In this work we show that the gravitational Chern-Simons term, aside from being a key ingredient in inflationary baryogenesis, modifies super-horizon gravitational waves produced during inflation. We compute the super-Hubble gravitational power spectrum in the slow-roll approximation and show that its overall amplitude is modified while its spectral index remains unchanged (at leading order in the slow-roll parameters). Then, we calculate the correction to the tensor to scalar ratio, T/S. We find a correction of T/S which is dependent on N (more precisely quadratic in N), the parameter characterizing the amplitude of the Chern-Simons terms. In a stringy embedding of the leptogenesis mechanism, N is the ratio between the Planck scale and the fundamental string scale. Thus, in principle, we provide a direct probe of leptogenesis due to stringy dynamics in the Cosmic Microwave Background (CMB). However, we demonstrate that the corresponding correction of T/S is in fact very small and not observable in the regime where our calculations are valid. To obtain a sizable effect, we argue that a non-linear calculation is necessary.

  17. Analysis of fuel using the Direct LSC method determination of bio-originated fuel in the presence of quenching

    Energy Technology Data Exchange (ETDEWEB)

    Doll, Charles G.; Wright, Cherylyn W.; Morley, Shannon M.; Wright, Bob W.

    2017-04-01

    A modified version of the Direct LSC method to correct for quenching effect was investigated for the determination of bio-originated fuel content in fuel samples produced from multiple biological starting materials. The modified method was found to be accurate in determining the percent bio-originated fuel to within 5% of the actual value for samples with quenching effects ≤43%. Analysis of highly quenched samples was possible when diluted with the exception of one sample with a 100% quenching effect.

  18. Analysis of fuel using the Direct LSC method determination of bio-originated fuel in the presence of quenching.

    Science.gov (United States)

    Doll, Charles G; Wright, Cherylyn W; Morley, Shannon M; Wright, Bob W

    2017-04-01

    A modified version of the Direct LSC method to correct for quenching effect was investigated for the determination of bio-originated fuel content in fuel samples produced from multiple biological starting materials. The modified method was found to be accurate in determining the percent bio-originated fuel to within 5% of the actual value for samples with quenching effects ≤43%. Analysis of highly quenched samples was possible when diluted with the exception of one sample with a 100% quenching effect.

  19. WE-E-BRB-10: DosCheck - an Electronic Chart Checking Tool for Dosimetrists.

    Science.gov (United States)

    Yang, D; Wu, Y; Yaddanapudi, S; Moore, K; Pierbuxg, B; Brame, S; Mutic, S

    2012-06-01

    In addition to treatment planning, dosimetrists have to prepare documentation and manually enter data in treatment management system (TMS) which did not transfer or setup automatically. The required documents and data are dependent on the disease site, treatment machine and clinical workflow. Errors and inconsistencies can cause redundant work, treatment delays and potentially treatment errors. To address these issues, an electronic checking software tool, DosCheck was clinically implemented to check the existence of necessary documentations and the integrity of manually-entered data. The purpose of this software is to reduce the frequency of human errors and to improve efficiency. DosCheck reads data and documents from 1) TMS, 2) Pinnacle TPS, and 3) DICOM plan files stored in a DICOM-RT PACS. It processes documents in Word and PDF format, treatment plan data in Pinnacle native format and DICOM format, and Mosaiq data in database records. The software cross-checks data accuracy and consistency by following rules that are pre-defined according to the clinical requirements and treatment sties. It interacts with dosimetrists and presents instantaneous results via graphical user interface. DosCheck has been implemented in C#. It performs a full check for a patient with 20 seconds. It has been clinically commissioned and is used daily by all dosimetrists at our institution. Retrospective analysis shows that DosCheck identifies 30% to 40% of previously reported dosimetrist human errors. Additional ∼30% errors are checked by other tools that could be integrated DosCheck in the near future. As an electronic data checking tool, DosCheck can obtain and process data and documents from multiple clinical computer systems in the radiation oncology department, and perform checks according to clinical rules. It is able to improve the accuracy and efficiency of clinical data and document process, and therefore to reduce any potential inconsistencies and errors. © 2012 American

  20. CMM Interim Check (U)

    Energy Technology Data Exchange (ETDEWEB)

    Montano, Joshua Daniel [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2015-03-23

    Coordinate Measuring Machines (CMM) are widely used in industry, throughout the Nuclear Weapons Complex and at Los Alamos National Laboratory (LANL) to verify part conformance to design definition. Calibration cycles for CMMs at LANL are predominantly one year in length. Unfortunately, several nonconformance reports have been generated to document the discovery of a certified machine found out of tolerance during a calibration closeout. In an effort to reduce risk to product quality two solutions were proposed – shorten the calibration cycle which could be costly, or perform an interim check to monitor the machine’s performance between cycles. The CMM interim check discussed makes use of Renishaw’s Machine Checking Gauge. This off-the-shelf product simulates a large sphere within a CMM’s measurement volume and allows for error estimation. Data was gathered, analyzed, and simulated from seven machines in seventeen different configurations to create statistical process control run charts for on-the-floor monitoring.

  1. Consistent model driven architecture

    Science.gov (United States)

    Niepostyn, Stanisław J.

    2015-09-01

    The goal of the MDA is to produce software systems from abstract models in a way where human interaction is restricted to a minimum. These abstract models are based on the UML language. However, the semantics of UML models is defined in a natural language. Subsequently the verification of consistency of these diagrams is needed in order to identify errors in requirements at the early stage of the development process. The verification of consistency is difficult due to a semi-formal nature of UML diagrams. We propose automatic verification of consistency of the series of UML diagrams originating from abstract models implemented with our consistency rules. This Consistent Model Driven Architecture approach enables us to generate automatically complete workflow applications from consistent and complete models developed from abstract models (e.g. Business Context Diagram). Therefore, our method can be used to check practicability (feasibility) of software architecture models.

  2. Requirements Specifications Checking of Embedded Real-Time Software

    Institute of Scientific and Technical Information of China (English)

    WU Guoqing(毋国庆); SHU Fengdi(舒风笛); WANG Min(王敏); CHEN Weiqing(陈伟清)

    2002-01-01

    After introducing the overview of our requirements description model HRFSM,the paper presents a dynamic software execution model (DERTS) of embedded real-time software, which can integrate control flow, data flow and time. Based on DERTS, a checking method is also presented. It consists of three kinds of checking and can check the consistency and completeness of the requirement specifications of embedded real-time software. Besides providing information helpful to improve the efficiency of analyzing and checking specifications,the checking method is flexible, and easy to understand and to use for the analyst.

  3. Interest Check List.

    Science.gov (United States)

    Bureau of Employment Security (DOL), Washington, DC.

    The original edition of the Department of Labor Interest Check List aims at helping students decide what kinds of work they would like and lists activities that are found in a broad range of industries and occupations. The student is advised to read each of approximately 175 items and indicate how he feels about the activity described by placing a…

  4. Checking BEBC superconducting magnet

    CERN Multimedia

    1974-01-01

    The superconducting coils of the magnet for the 3.7 m Big European Bubble Chamber (BEBC) had to be checked, see Annual Report 1974, p. 60. The photo shows a dismantled pancake. By December 1974 the magnet reached again the field design value of 3.5 T.

  5. An Extended Ontology Model and Ontology Checking Based on Description Logics

    Institute of Scientific and Technical Information of China (English)

    王洪伟; 蒋馥; 吴家春

    2004-01-01

    Ontology is defined as an explicit specification of a conceptualization. In this paper, an extended ontology model was constructed using description logics, which is a 5-tuples including term set, individual set, term definition set, instantiation assertion set and term restriction set. Based on the extended model, the issue on ontology checking was studied with the conclusion that the four kinds of term checking, including term satisfiability checking, term subsumption checking, term equivalence checking and term disjointness checking, can be reduced to the satisfiability checking, and satisfiability checking can be transformed into instantiation consistence checking.

  6. Computational fact checking from knowledge networks

    CERN Document Server

    Ciampaglia, Giovanni Luca; Rocha, Luis M; Bollen, Johan; Menczer, Filippo; Flammini, Alessandro

    2015-01-01

    Traditional fact checking by expert journalists cannot keep up with the enormous volume of information that is now generated online. Computational fact checking may significantly enhance our ability to evaluate the veracity of dubious information. Here we show that the complexities of human fact checking can be approximated quite well by finding the shortest path between concept nodes under properly defined semantic proximity metrics on knowledge graphs. Framed as a network problem this approach is feasible with efficient computational techniques. We evaluate this approach by examining tens of thousands of claims related to history, entertainment, geography, and biographical information using a public knowledge graph extracted from Wikipedia. Statements independently known to be true consistently receive higher support via our method than do false ones. These findings represent a significant step toward scalable computational fact-checking methods that may one day mitigate the spread of harmful misinformation...

  7. Partial model checking

    DEFF Research Database (Denmark)

    Andersen, Henrik Reif

    1995-01-01

    A major obstacle in applying finite-state model checking to the verification of large systems is the combinatorial explosion of the state space arising when many loosely coupled parallel processes are considered. The problem also known as the state-explosion problem has been attacked from various...... sides. This paper presents a new approach based on partial model checking where parts of the concurrent system are gradually removed while transforming the specification accordingly. When the intermediate specifications constructed in this manner can be kept small, the state-explosion problem is avoided....... Experimental results with a prototype implemented in Standard ML, shows that for Milner's Scheduler-an often used benchmark-this approach improves on the published results on binary decision diagrams and is comparable to results obtained using generalized decision diagrams. Specifications are expressed...

  8. Check Verbraucherpolitik und Verbraucherbeteiligung

    DEFF Research Database (Denmark)

    Hagen, Kornelia; Micklitz, Hans-W.; Oehler, Andreas;

    2013-01-01

    The paper discusses the opportunities for an empirically grounded decision support system as an instrument for independent and scientifically based consumer policy consulting. To date, consumer policy is dominated by the information paradigm and the leitbild of the rational, sovereign...... and information-seeking consumer. Yet, both everyday practice and research in behavioural economics show that this view lacks empirical ground. In fact, there are different consumer types and different forms of rationalities at work. Effective consumer policy making should be based on the empirically revealed...... an empirically based “Check Consumer Policy and Consumer Participation” as a systematic decision and evaluation tool for policy makers. This check should be independent from the government and should be grounded on an empirical view of the consumer. Consumer policy tools should be tested with real consumers...

  9. Check, check, double check: checking the autopilot causes distrust : Experimental studies on the effects of compulsive perseveration

    NARCIS (Netherlands)

    Dek, E.C.P.

    2015-01-01

    Obsessive-compulsive disorder (OCD) is characterized by persistent doubt. The majority of patients with OCD engage in repeated checking to reduce these feelings of uncertainty. However, numerous studies demonstrated that repetitive behavior ironically increases uncertainty: perseverative checking in

  10. Conditional Model Checking

    CERN Document Server

    Beyer, Dirk; Keremoglu, M Erkan; Wendler, Philipp

    2011-01-01

    Software model checking, as an undecidable problem, has three possible outcomes: (1) the program satisfies the specification, (2) the program does not satisfy the specification, and (3) the model checker fails. The third outcome usually manifests itself in a space-out, time-out, or one component of the verification tool giving up; in all of these failing cases, significant computation is performed by the verification tool before the failure, but no result is reported. We propose to reformulate the model-checking problem as follows, in order to have the verification tool report a summary of the performed work even in case of failure: given a program and a specification, the model checker returns a condition P ---usually a state predicate--- such that the program satisfies the specification under the condition P ---that is, as long as the program does not leave states in which P is satisfied. We are of course interested in model checkers that return conditions P that are as weak as possible. Instead of outcome ...

  11. Body checking and avoidance in ethnically diverse female college students.

    Science.gov (United States)

    White, Emily K; Warren, Cortney S

    2013-09-01

    Although body checking and avoidance behaviors are common in women with eating disorders, minimal research has examined the nature or correlates of these behaviors in ethnically diverse female college students without eating disorders. Self-identified European American (n=268), Asian American (n=163), Latina (n=146), and African American (n=73) women completed self-report measures of body checking and avoidance, thin-ideal internalization, eating pathology, and clinical impairment. Results indicated that European and Asian American women reported significantly more body checking and avoidance than African American and Latina women. Generally, correlates of body checking and avoidance were consistent across ethnic groups: Regression analyses indicated that type of ethnicity predicted body checking and avoidance; and ethnicity, body checking, and body avoidance predicted eating pathology and clinical impairment. These associations suggest that body checking and avoidance are not benign behaviors in diverse nonclinical women.

  12. Solid consistency

    Science.gov (United States)

    Bordin, Lorenzo; Creminelli, Paolo; Mirbabayi, Mehrdad; Noreña, Jorge

    2017-03-01

    We argue that isotropic scalar fluctuations in solid inflation are adiabatic in the super-horizon limit. During the solid phase this adiabatic mode has peculiar features: constant energy-density slices and comoving slices do not coincide, and their curvatures, parameterized respectively by ζ and Script R, both evolve in time. The existence of this adiabatic mode implies that Maldacena's squeezed limit consistency relation holds after angular average over the long mode. The correlation functions of a long-wavelength spherical scalar mode with several short scalar or tensor modes is fixed by the scaling behavior of the correlators of short modes, independently of the solid inflation action or dynamics of reheating.

  13. Bounded Model Checking of CTL

    Institute of Scientific and Technical Information of China (English)

    Zhi-Hong Tao; Cong-Hua Zhou; Zhong Chen; Li-Fu Wang

    2007-01-01

    Bounded Model Checking has been recently introduced as an efficient verification method for reactive systems.This technique reduces model checking of linear temporal logic to propositional satisfiability.In this paper we first present how quantified Boolean decision procedures can replace BDDs.We introduce a bounded model checking procedure for temporal logic CTL* which reduces model checking to the satisfiability of quantified Boolean formulas.Our new technique avoids the space blow up of BDDs, and extends the concept of bounded model checking.

  14. Checking Security Policy Compliance

    CERN Document Server

    Gowadia, Vaibhav; Kudo, Michiharu

    2008-01-01

    Ensuring compliance of organizations to federal regulations is a growing concern. This paper presents a framework and methods to verify whether an implemented low-level security policy is compliant to a high-level security policy. Our compliance checking framework is based on organizational and security metadata to support refinement of high-level concepts to implementation specific instances. Our work uses the results of refinement calculus to express valid refinement patterns and their properties. Intuitively, a low-level security policy is compliant to a high-level security policy if there is a valid refinement path from the high-level security policy to the low-level security policy. Our model is capable of detecting violations of security policies, failures to meet obligations, and capability and modal conflicts.

  15. HCH for Checking Containment of XPath Fragment

    Institute of Scientific and Technical Information of China (English)

    Jian-Hua Feng; Yu-Guo Liao; Yong Zhang

    2007-01-01

    XPath is ubiquitous in XML applications for navigating XML trees and selecting a set of element nodes. In XPath query processing, one of the most important issues is how to efficiently check containment relationship between two XPath expressions. To get out of the intricacy and complexity caused by numerous XPath features, we investigate this issue on a frequently used fragment of XPath expressions that consists of node tests, the child axis (/), the descendant axis (//), branches ([]) and label wildcards (*). Prior work has shown that homomorphism technology can be used for containment checking. However, homomorphism is the sufficient but not necessary condition for containment. For special classes of this fragment, the homomorphism algorithm returns false negatives. To address this problem, this paper proposes two containment techniques, conditioned homomorphism and hidden conditioned homomorphism, and then presents sound algorithms for checking containment. Experimental results confirm the practicability and efficiency of the proposed algorithms.

  16. Cloning, expression, purification, crystallization and preliminary X-ray analysis of EaLsc, a levansucrase from Erwinia amylovora.

    Science.gov (United States)

    Caputi, Lorenzo; Cianci, Michele; Benini, Stefano

    2013-05-01

    The Gram-negative bacterium Erwinia amylovora is a destructive pathogen of Rosaceae. During infection, E. amylovora produces the exopolysaccharide levan, which contributes to the occlusion of plant vessels, causing the wilting of shoots. Levan is a fructose polymer that is synthesized by multifunctional enzymes called levansucrases. The levansucrase from E. amylovora (EaLsc) was heterologously expressed as a GST-fusion protein in Escherichia coli, purified and crystallized after tag removal. The protein crystallized in space group P21212. X-ray diffraction data were acquired to 2.77 Å resolution. The structure of the enzyme was solved by molecular replacement. The asymmetric unit contains eight enzyme molecules, giving a solvent content of 58.74% and a Matthews coefficient of 2.98 Å(3) Da(-1).

  17. Immunity status of adults and children against poliomyelitis virus type 1 strains CHAT and Sabin (LSc-2ab in Germany

    Directory of Open Access Journals (Sweden)

    Diedrich Sabine

    2010-12-01

    Full Text Available Abstract Background In October 2007, the working group CEN/TC 216 of the European Committee for standardisation suggested that the Sabin oral poliovirus vaccine type 1 strain (LSc-2ab presently used for virucidal tests should be replaced by another attenuated vaccine poliovirus type 1 strain, CHAT. Both strains were historically used as oral vaccines, but the Sabin type 1 strain was acknowledged to be more attenuated. In Germany, vaccination against poliomyelitis was introduced in 1962 using the oral polio vaccine (OPV containing Sabin strain LSc-2ab. The vaccination schedule was changed from OPV to an inactivated polio vaccine (IPV containing wild polio virus type 1 strain Mahoney in 1998. In the present study, we assessed potential differences in neutralising antibody titres to Sabin and CHAT in persons with a history of either OPV, IPV, or OPV with IPV booster. Methods Neutralisation poliovirus antibodies against CHAT and Sabin 1 were measured in sera of 41 adults vaccinated with OPV. Additionally, sera from 28 children less than 10 years of age and immunised with IPV only were analysed. The neutralisation assay against poliovirus was performed according to WHO guidelines. Results The neutralisation activity against CHAT in adults with OPV vaccination history was significantly lower than against Sabin poliovirus type 1 strains (Wilcoxon signed-rank test P Conclusion The lack of neutralising antibodies against the CHAT strain in persons vaccinated with OPV might be associated with an increased risk of reinfection with the CHAT polio virus type 1, and this implies a putative risk of transmission of the virus to polio-free communities. We strongly suggest that laboratory workers who were immunised with OPV receive a booster vaccination with IPV before handling CHAT in the laboratory.

  18. Model Checking as Static Analysis

    DEFF Research Database (Denmark)

    Zhang, Fuyuan

    Both model checking and static analysis are prominent approaches to detecting software errors. Model Checking is a successful formal method for verifying properties specified in temporal logics with respect to transition systems. Static analysis is also a powerful method for validating program...... properties which can predict safe approximations to program behaviors. In this thesis, we have developed several static analysis based techniques to solve model checking problems, aiming at showing the link between static analysis and model checking. We focus on logical approaches to static analysis......-calculus can be encoded as the intended model of SFP. Our research results have strengthened the link between model checking and static analysis. This provides a theoretical foundation for developing a unied tool for both model checking and static analysis techniques....

  19. An application of LSC method for the measurement of gross alpha and beta activities in spiked water and drinking water samples

    Directory of Open Access Journals (Sweden)

    Çakal Gaye Özgür

    2015-09-01

    Full Text Available In this study, after the pulse shape calibration of a liquid scintillation counting (LSC spectrometer (Quantulus 1220, the effi ciency was determined depending on sample quenching parameters. Then, gross alpha and beta activities in two spiked water samples obtained from International Atomic Energy Agency (IAEA were used for the validation of the ASTM D7283-06 method, which is a standard test method for alpha and beta activity in water by LSC. Later, the drinking water samples (35 tap water and 9 bottled water obtained from different districts of Ankara, Turkey, were measured. The maximum gross alpha activities are measured to be 0.08 Bq/L for tap waters and 0.13 Bq/L for bottled waters, whereas the maximum gross beta activities are found to be 0.18 Bq/L for tap waters and 0.16 Bq/L for bottled waters. These results indicate that these drinking water samples are below the required limits, which are 0.1 Bq/L for alpha emitting radionuclides and 1 Bq/L for beta emitting radionuclides. As a result, gross alpha and beta activities in drinking water of Ankara were determined accurately by this validated LSC method. It is also worth noting that LSC is a rapid and accurate method for the determination of gross alpha and beta activities without requiring a tedious sample preparation.

  20. A novel role for Lsc/p115 RhoGEF and LARG in regulating RhoA activity downstream of adhesion to fibronectin.

    Science.gov (United States)

    Dubash, Adi D; Wennerberg, Krister; García-Mata, Rafael; Menold, Marisa M; Arthur, William T; Burridge, Keith

    2007-11-15

    Adhesion of cells to extracellular matrix proteins such as fibronectin initiates signaling cascades that affect cell morphology, migration and survival. Some of these signaling pathways involve the Rho family of GTPases, such as Cdc42, Rac1 and RhoA, which play a key role in regulating the organization of the cytoskeleton. Although significant advances have been made in understanding how Rho proteins control cytoskeletal architecture, less is known about the signals controlling activation of the GTPases themselves. The focus of this study was to determine which guanine nucleotide exchange factor(s) are responsible for activation of RhoA downstream of adhesion to fibronectin. Using an affinity pulldown assay for activated exchange factors, we show that the RhoA-specific exchange factors Lsc/p115 RhoGEF and LARG are activated when cells are plated onto fibronectin, but not other exchange factors such as Ect2 or Dbl. Knockdown of Lsc and LARG together significantly decreases RhoA activation and formation of stress fibers and focal adhesions downstream of fibronectin adhesion. Similarly, overexpression of a catalytically inactive mutant of Lsc/p115 RhoGEF inhibits RhoA activity and formation of stress fibers and focal adhesions on fibronectin. These data establish a previously uncharacterized role for the exchange factors Lsc/p115 RhoGEF and LARG in linking fibronectin signals to downstream RhoA activation.

  1. Advanced microbial check valve development

    Science.gov (United States)

    Colombo, G. V.; Greenley, D. R.

    1980-01-01

    A flight certified assembly identified as a Microbial Check Valve (MCV) was developed and tested. The MCV is a canister packed with an iodinated anionic exchange resin. The device is used to destroy organisms in a water stream as the water passes through the device. The device is equally effective for fluid flow in either direction and its primary method of organism removal is killing rather than filtering. The MCV was successfully developed for the space shuttle to: disinfect fuel cell water; and prevent back contamination of the stored potable water supply. One version of the device consists of a high residual iodinated resin bed that imparts approximately 2 ppm of iodine to the fuel cell water as it flows to the potable water tanks. A second version of the device consists of a low residual iodinated resin bed. One of these low residual beds is located at each use port in the potable water system for the dual purpose of removing some iodine from the potable water as it is dispensed and also to prevent back contamination of the potable supply.

  2. 31 CFR 103.29 - Purchases of bank checks and drafts, cashier's checks, money orders and traveler's checks.

    Science.gov (United States)

    2010-07-01

    ..., cashier's checks, money orders and traveler's checks. 103.29 Section 103.29 Money and Finance: Treasury... orders and traveler's checks. (a) No financial institution may issue or sell a bank check or draft, cashier's check, money order or traveler's check for $3,000 or more in currency unless it maintains...

  3. Compositional and Quantitative Model Checking

    DEFF Research Database (Denmark)

    Larsen, Kim Guldstrand

    2010-01-01

    This paper gives a survey of a composition model checking methodology and its succesfull instantiation to the model checking of networks of finite-state, timed, hybrid and probabilistic systems with respect; to suitable quantitative versions of the modal mu-calculus [Koz82]. The method is based...

  4. Property Differencing for Incremental Checking

    Science.gov (United States)

    Yang, Guowei; Khurshid, Sarfraz; Person, Suzette; Rungta, Neha

    2014-01-01

    This paper introduces iProperty, a novel approach that facilitates incremental checking of programs based on a property di erencing technique. Speci cally, iProperty aims to reduce the cost of checking properties as they are initially developed and as they co-evolve with the program. The key novelty of iProperty is to compute the di erences between the new and old versions of expected properties to reduce the number and size of the properties that need to be checked during the initial development of the properties. Furthermore, property di erencing is used in synergy with program behavior di erencing techniques to optimize common regression scenarios, such as detecting regression errors or checking feature additions for conformance to new expected properties. Experimental results in the context of symbolic execution of Java programs annotated with properties written as assertions show the e ectiveness of iProperty in utilizing change information to enable more ecient checking.

  5. Heteroscedasticity checks for regression models

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    For checking on heteroscedasticity in regression models, a unified approach is proposed to constructing test statistics in parametric and nonparametric regression models. For nonparametric regression, the test is not affected sensitively by the choice of smoothing parameters which are involved in estimation of the nonparametric regression function. The limiting null distribution of the test statistic remains the same in a wide range of the smoothing parameters. When the covariate is one-dimensional, the tests are, under some conditions, asymptotically distribution-free. In the high-dimensional cases, the validity of bootstrap approximations is investigated. It is shown that a variant of the wild bootstrap is consistent while the classical bootstrap is not in the general case, but is applicable if some extra assumption on conditional variance of the squared error is imposed. A simulation study is performed to provide evidence of how the tests work and compare with tests that have appeared in the literature. The approach may readily be extended to handle partial linear, and linear autoregressive models.

  6. New methods of concurrent checking

    CERN Document Server

    Goessel, Michael; Sogomonyan, Egor; Marienfeld, Daniel

    2008-01-01

    Written by a team of two leading experts and two very successful young former PhD students, New Methods of Concurrent Checking describes new methods of concurrent checking, such as partial duplication, use of output dependencies, complementary circuits, self-dual parity, self-dual duplication and others. A special chapter demonstrates how the new general methods of concurrent checking can be more specifically applied to regular structures to obtain optimum results. This is exemplified for all types of adders up to 64 bits with a level of detail never before presented in the literature. The cle

  7. Model Checking Algorithms for CTMDPs

    DEFF Research Database (Denmark)

    Buchholz, Peter; Hahn, Ernst Moritz; Hermanns, Holger

    2011-01-01

    Continuous Stochastic Logic (CSL) can be interpreted over continuoustime Markov decision processes (CTMDPs) to specify quantitative properties of stochastic systems that allow some external control. Model checking CSL formulae over CTMDPs requires then the computation of optimal control strategie...

  8. Model Checking Algorithms for CTMDPs

    DEFF Research Database (Denmark)

    Buchholz, Peter; Hahn, Ernst Moritz; Hermanns, Holger

    2011-01-01

    Continuous Stochastic Logic (CSL) can be interpreted over continuoustime Markov decision processes (CTMDPs) to specify quantitative properties of stochastic systems that allow some external control. Model checking CSL formulae over CTMDPs requires then the computation of optimal control strategie...

  9. Treasury Check Verification Query (TCVQ)

    Data.gov (United States)

    Social Security Administration — The TCVQ system determines the SSN of an individual whose check has been returned to a local field office. The FO is able to request this information via the TCVQ...

  10. Coverage Metrics for Model Checking

    Science.gov (United States)

    Penix, John; Visser, Willem; Norvig, Peter (Technical Monitor)

    2001-01-01

    When using model checking to verify programs in practice, it is not usually possible to achieve complete coverage of the system. In this position paper we describe ongoing research within the Automated Software Engineering group at NASA Ames on the use of test coverage metrics to measure partial coverage and provide heuristic guidance for program model checking. We are specifically interested in applying and developing coverage metrics for concurrent programs that might be used to support certification of next generation avionics software.

  11. Statistical Model Checking of Rich Models and Properties

    DEFF Research Database (Denmark)

    Poulsen, Danny Bøgsted

    in undecidability issues for the traditional model checking approaches. Statistical model checking has proven itself a valuable supplement to model checking and this thesis is concerned with extending this software validation technique to stochastic hybrid systems. The thesis consists of two parts: the first part......Software is in increasing fashion embedded within safety- and business critical processes of society. Errors in these embedded systems can lead to human casualties or severe monetary loss. Model checking technology has proven formal methods capable of finding and correcting errors in software....... However, software is approaching the boundary in terms of the complexity and size that model checking can handle. Furthermore, software systems are nowadays more frequently interacting with their environment hence accurately modelling such systems requires modelling the environment as well - resulting...

  12. Automatization and familiarity in repeated checking

    NARCIS (Netherlands)

    Dek, Eliane C P; van den Hout, Marcel A.; Giele, Catharina L.; Engelhard, Iris M.

    2014-01-01

    Repeated checking paradoxically increases memory uncertainty. This study investigated the underlying mechanism of this effect. We hypothesized that as a result of repeated checking, familiarity with stimuli increases, and automatization of the checking procedure occurs, which should result in decrea

  13. The development of practice manual for LSC based on job analysis in radiation measurement and analysis

    Science.gov (United States)

    Shin, W. H.; Park, T. J.

    2017-06-01

    Radiation technology is closely related to the industrial growth and the creation of employment in Korea. The techniques as radiation or/and radioactivity measurement, and the practical skills achieving a higher level analysis are required. In this study, practice manual for liquid scintillation counter were developed by job analysis. Raw data applied in job analysis are collected by on/off line survey by 420 workers employed in KOREA. Importance-priority analysis was performed to make duties and competency unit that consists of knowledge, skills as each task. Refined data was reviewed by expert who experienced actual duties on site. Classification was conducted by focus group interview to deduct duties and competency unit. From the radiation devices in measurement and analysis, liquid scintillation counter was preferentially selected because of the high demands for training. Investigation of build-up status to liquid scintillation counter in KOREA was conducted. Then technical specification and operating procedure of 2 main devices were analyzed and integrated by practice manual. Duties and competency unit were applied to integrated materials respectively. To validate effectiveness, test curriculum was designed by the advanced course to workers who engaged in radiation measurement and analysis. The developed manual is structured to take advantage of test training. This manual will be a practical handbook that can improve the knowledge, skills of radiation workers in Korea.

  14. Analysis of the LSC microbunching instability in MaRIE linac reference design

    Energy Technology Data Exchange (ETDEWEB)

    Yampolsky, Nikolai [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2016-09-22

    In this report we estimate the effect of the microbunching instability in the MaRIE XFEL linac. The reference design for the linac is described in a separate report. The parameters of the L1, L2, and L3 linacs as well as BC1 and BC2 bunch compressors were the same as in the referenced report. The beam dynamics was assumed to be linear along the accelerator (which is a reasonable assumption for estimating the effect of the microbunching instability). The parameters of the bunch also match the parameters described in the referenced report. Additionally, it was assumed that the beam radius is equal to R = 100 m and does not change along linac. This assumption needs to be revisited at later studies. The beam dynamics during acceleration was accounted in the matrix formalism using a Matlab code. The input parameters for the linacs are: RF peak gradient, RF frequency, RF phase, linac length, and initial beam energy. The energy gain and the imposed chirp are calculated based on the RF parameters self-consistently. The bunch compressors are accounted in the matrix formalism as well. Each chicane is characterized by the beam energy and the R56 matrix element. It was confirmed that the linac and beam parameters described previously provide two-stage bunch compression with compression ratios of 10 and 20 resulting in the bunch of 3kA peak current.

  15. Analysis of the LSC microbunching instability in MaRIE linac reference design

    Energy Technology Data Exchange (ETDEWEB)

    Yampolsky, Nikolai [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2016-09-22

    In this report we estimate the effect of the microbunching instability in the MaRIE XFEL linac. The reference design for the linac is described in a separate report [1]. The parameters of the L1, L2, and L3 linacs as well as BC1 and BC2 bunch compressors were the same as in the referenced report. The beam dynamics was assumed to be linear along the accelerator (which is a reasonable assumption for estimating the effect of the microbunching instability). The parameters of the bunch also match the parameters described in [1]. Additionally it was assumed that the beam radius is equal to R = 100 m and does not change along linac. This assumption needs to be revisited at later studies. The beam dynamics during acceleration was accounted in the matrix formalism using a Matlab code. The input parameters for the linacs are: RF peak gradient, RF frequency, RF phase, linac length, and initial beam energy. The energy gain and the imposed chirp are calculated based on the RF parameters self-consistently. The bunch compressors are accounted in the matrix formalism as well. Each chicane is characterized by the beam energy and the R56 matrix element. It was confirmed that the linac and beam parameters described in [1] provide two-stage bunch compression with compression ratios of 10 and 20 resulting in the bunch of 3kA peak current.

  16. Model Checking Linearizability via Refinement

    Science.gov (United States)

    Liu, Yang; Chen, Wei; Liu, Yanhong A.; Sun, Jun

    Linearizability is an important correctness criterion for implementations of concurrent objects. Automatic checking of linearizability is challenging because it requires checking that 1) all executions of concurrent operations be serializable, and 2) the serialized executions be correct with respect to the sequential semantics. This paper describes a new method to automatically check linearizability based on refinement relations from abstract specifications to concrete implementations. Our method avoids the often difficult task of determining linearization points in implementations, but can also take advantage of linearization points if they are given. The method exploits model checking of finite state systems specified as concurrent processes with shared variables. Partial order reduction is used to effectively reduce the search space. The approach is built into a toolset that supports a rich set of concurrent operators. The tool has been used to automatically check a variety of implementations of concurrent objects, including the first algorithms for the mailbox problem and scalable NonZero indicators. Our system was able to find all known and injected bugs in these implementations.

  17. Program Analysis as Model Checking

    DEFF Research Database (Denmark)

    Olesen, Mads Chr.

    and abstract interpretation. Model checking views the program as a finite automaton and tries to prove logical properties over the automaton model, or present a counter-example if not possible — with a focus on precision. Abstract interpretation translates the program semantics into abstract semantics...... problems as the other by a reformulation. This thesis argues that there is even a convergence on the practical level, and that a generalisation of the formalism of timed automata into lattice automata captures key aspects of both methods; indeed model checking timed automata can be formulated in terms...... of an abstract interpretation. For the generalisation to lattice automata to have benefit it is important that efficient tools exist. This thesis presents multi-core tools for efficient and scalable reachability and Büchi emptiness checking of timed/lattice automata. Finally, a number of case studies...

  18. Production mask composition checking flow

    Science.gov (United States)

    Ma, Shou-Yuan; Yang, Chuen-Huei; Tsai, Joe; Wang, Alice; Lin, Roger; Lee, Rachel; Deng, Erwin; Lin, Ling-Chieh; Liao, Hung-Yueh; Tsai, Jenny; Bowhill, Amanda; Vu, Hien; Russell, Gordon

    2016-05-01

    The mask composition checking flow is an evolution of the traditional mask rule check (MRC). In order to differentiate the flow from MRC, we call it Mask Data Correctness Check (MDCC). The mask house does MRC only to identify process limitations including writing, etching, metrology, etc. There still exist many potential errors that could occur when the frame, main circuit and dummies all together form a whole reticle. The MDCC flow combines the design rule check (DRC) and MRC concepts to adapt to the complex patterns in today's wafer production technologies. Although photomask data has unique characteristics, the MRC tool in Calibre® MDP can easily achieve mask composition by using the Extended MEBES job deck (EJB) format. In EJB format, we can customize the combination of any input layers in an IC design layout format, such as OASIS. Calibre MDP provides section-based processing for many standard verification rule format (SVRF) commands that support DRC-like checks on mask data. Integrating DRC-like checking with EJB for layer composition, we actually perform reticle-level DRC, which is the essence of MDCC. The flow also provides an early review environment before the photomask pattern files are available. Furthermore, to incorporate the MDCC in our production flow, runtime is one of the most important indexes we consider. When the MDCC is included in the tape-out flow, the runtime impact is very limited. Calibre, with its multi-threaded processes and good scalability, is the key to achieving acceptable runtime. In this paper, we present real case runtime data for 28nm and 14nm technology nodes, and prove the practicability of placing MDCC into mass production.

  19. Testing the visual consistency of web sites

    NARCIS (Netherlands)

    Geest, van der Thea; Loorbach, Nicole

    2005-01-01

    Consistency in the visual appearance of Web pages is often checked by experts, such as designers or reviewers. This article reports a card sort study conducted to determine whether users rather than experts could distinguish visual (in-)consistency in Web elements and pages. The users proved to agre

  20. Optimal database locks for efficient integrity checking

    DEFF Research Database (Denmark)

    Martinenghi, Davide

    2004-01-01

    In concurrent database systems, correctness of update transactions refers to the equivalent effects of the execution schedule and some serial schedule over the same set of transactions. Integrity constraints add further semantic requirements to the correctness of the database states reached upon...... the execution of update transactions. Several methods for efficient integrity checking and enforcing exist. We show in this paper how to apply one such method to automatically extend update transactions with locks and simplified consistency tests on the locked entities. All schedules produced in this way...

  1. Checking MSC Specifications for Timing Inconsistency

    Institute of Scientific and Technical Information of China (English)

    LI Xuandong(李宣东); TAN Wenkai(谭文凯); ZHENG Guoliang(郑国梁)

    2002-01-01

    Message sequence chart (MSC) is a graphical and textual language for the description and specification of the interactions between system components. MSC specifica tions allow convenient expression of multiple scenarios, and offer an intuitive and visual way of describing design requirements. Like any other aspect of the specification and design process, MSCs are amenable to errors, and their analysis is important. In this paper, the verification problem of MSC specification for timing inconsistency is studied, which means that no execu tion scenario described by an MSC specification is timing consistent. An algorithm is developed to check MSC specifications for timing inconsistency.

  2. Compositional and Quantitative Model Checking

    DEFF Research Database (Denmark)

    Larsen, Kim Guldstrand

    2010-01-01

    on the existence of a quotient construction, allowing a property phi of a parallel system phi/A to be transformed into a sufficient and necessary quotient-property yolA to be satisfied by the component 13. Given a model checking problem involving a network Pi I and a property yo, the method gradually move (by...

  3. Model checking of component connectors

    NARCIS (Netherlands)

    Izadi, Mohammad

    2011-01-01

    We present a framework for automata theoretic model checking of coordination systems specified in Reo coordination language. To this goal, we introduce Buchi automata of records (BAR) and their augmented version (ABAR) as an operational modeling formalism that covers several intended forms of behavi

  4. Reducing Lookups for Invariant Checking

    DEFF Research Database (Denmark)

    Thomsen, Jakob Grauenkjær; Clausen, Christian; Andersen, Kristoffer Just;

    2013-01-01

    This paper helps reduce the cost of invariant checking in cases where access to data is expensive. Assume that a set of variables satisfy a given invariant and a request is received to update a subset of them. We reduce the set of variables to inspect, in order to verify that the invariant is sti...

  5. Test of the consistency of various linearized semiclassical initial value time correlation functions in application to inelastic neutron scattering from liquid para-hydrogen

    Energy Technology Data Exchange (ETDEWEB)

    Miller, William; Liu, Jian; Miller, William H.

    2008-03-15

    The linearized approximation to the semiclassical initial value representation (LSC-IVR) is used to calculate time correlation functions relevant to the incoherent dynamic structure factor for inelastic neutron scattering from liquid para-hydrogen at 14 K. Various time correlations functions were used which, if evaluated exactly, would give identical results, but they do not because the LSC-IVR is approximate. Some of the correlation functions involve only linear operators, and others involve non-linear operators. The consistency of the results obtained with the various time correlation functions thus provides a useful test of the accuracy of the LSC-IVR approximation and its ability to treat correlation functions involving both linear and nonlinear operators in realistic anharmonic systems. The good agreement of the results obtained from different correlation functions, their excellent behavior in the spectral moment tests based on the exact moment constraints, and their semi-quantitative agreement with the inelastic neutron scattering experimental data all suggest that the LSC-IVR is indeed a good short-time approximation for quantum mechanical correlation functions.

  6. DMFC Performance of Polymer Electrolyte Membranes Prepared from a Graft-Copolymer Consisting of a Polysulfone Main Chain and Styrene Sulfonic Acid Side Chains

    Directory of Open Access Journals (Sweden)

    Nobutaka Endo

    2016-08-01

    Full Text Available Polymer electrolyte membranes (PEMs for direct methanol fuel cell (DMFC applications were prepared from a graft-copolymer (PSF-g-PSSA consisting of a polysulfone (PSF main chain and poly(styrene sulfonic acid (PSSA side chains with various average distances between side chains (Lav and side chain lengths (Lsc. The polymers were synthesized by grafting ethyl p-styrenesulfonate (EtSS on macro-initiators of chloromethylated polysulfone with different contents of chloromethyl (CM groups, and by changing EtSS content in the copolymers by using atom transfer radical polymerization (ATRP. The DMFC performance tests using membrane electrode assemblis (MEAs with the three types of the PEMs revealed that: a PSF-g-PSSA PEM (SF-6 prepared from a graft copolymer with short average distances between side chains (Lav and medium Lsc had higher DMFC performance than PEMs with long Lav and long Lsc or with short Lav and short Lsc. SF-6 had about two times higher PDmax (68.4 mW/cm2 than Nafion® 112 at 30 wt % of methanol concentration. Furthermore, it had 58.2 mW/cm2 of PDmax at 50 wt % of methanol concentration because of it has the highest proton selectivity during DMFC operation of all the PSF-g-PSSA PEMs and Nafion® 112.

  7. 27 CFR 70.101 - Bad checks.

    Science.gov (United States)

    2010-04-01

    ... 27 Alcohol, Tobacco Products and Firearms 2 2010-04-01 2010-04-01 false Bad checks. 70.101 Section....101 Bad checks. If any check or money order in payment of any amount receivable under Title 26 of the... appropriate TTB officer that such check was tendered in good faith and that such person had reasonable...

  8. Jet Formation Mechanism Contrast Between ASC and LSC%环型与线型聚能装药射流成型机理对比

    Institute of Scientific and Technical Information of China (English)

    傅磊; 王伟力; 吕进; 李永胜

    2014-01-01

    Asymmetry exists during the process of jet formation of Annular shaped charge (ASC) liner, and the existing theo-ry on the linear shaped charge (LSC) jet formation cannot be used directly. DNYA 3D software was used to simulate the jet formation process of ASC and LSC with the structure of same section. Through contrast, the slug and jet parameter charac-teristics of ASC were analyzed, and it might provide reference to the theoretical research and engineering application.%环型聚能装药药型罩2侧在挤压汇聚形成射流过程中存在不对称性,不能完全套用线型聚能装药射流成型的现有理论。利用DYNA3D软件对相同剖面结构的环型、线型聚能装药射流成型过程进行数值模拟,通过比较分析得出了环型聚能装药形成杵体及射流参数的分布特性,为进一步理论研究及工程应用提供参考。

  9. Model Checking over Paraconsistent Temporal Logic

    Institute of Scientific and Technical Information of China (English)

    CHEN Dong-huo; WANG Lin-zhang; CUI Jia-lin

    2008-01-01

    Classical logic cannot be used to effectively reason about concurrent systems with inconsistencies (inconsistencies often occur, especially in the early stage of the development, when large and complex concurrent systems are developed). In this paper, we propose the use of a guasi-classical temporal logic (QCTL) for supporting the verification of temporal properties of such systems even where the consistent model is not available. Our models are paraKripke structures ( extended standard Kripke structures), in which both a formula and its negation are satisfied in a same state, and properties to be verified are expressed by QCTL with paraKripke structures semantics. We introduce a novel notion of paraKripke models, which grasps the paraconsistent character of the entailment relation of QCTL. Furthermore, we explore the methodology of model checking over QCTL, and describe the detailed algorithm of implementing QCTL model checker. In the sequel, a simple example is presented, showing how to exploit the proposed model checking technique to verify the temporal properties of inconsistent concurrent systems.

  10. Consistence of Network Filtering Rules

    Institute of Scientific and Technical Information of China (English)

    SHE Kun; WU Yuancheng; HUANG Juncai; ZHOU Mingtian

    2004-01-01

    The inconsistence of firewall/VPN(Virtual Private Network) rule makes a huge maintainable cost.With development of Multinational Company,SOHO office,E-government the number of firewalls/VPN will increase rapidly.Rule table in stand-alone or network will be increased in geometric series accordingly.Checking the consistence of rule table manually is inadequate.A formal approach can define semantic consistence,make a theoretic foundation of intelligent management about rule tables.In this paper,a kind of formalization of host rules and network ones for auto rule-validation based on SET theory were proporsed and a rule validation scheme was defined.The analysis results show the superior performance of the methods and demonstrate its potential for the intelligent management based on rule tables.

  11. 25 CFR 11.421 - Bad checks.

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Bad checks. 11.421 Section 11.421 Indians BUREAU OF... Criminal Offenses § 11.421 Bad checks. (a) A person who issues or passes a check or similar sight order for..., and the issuer failed to make good within 10 days after receiving notice of that refusal....

  12. Timing analysis by model checking

    Science.gov (United States)

    Naydich, Dimitri; Guaspari, David

    2000-01-01

    The safety of modern avionics relies on high integrity software that can be verified to meet hard real-time requirements. The limits of verification technology therefore determine acceptable engineering practice. To simplify verification problems, safety-critical systems are commonly implemented under the severe constraints of a cyclic executive, which make design an expensive trial-and-error process highly intolerant of change. Important advances in analysis techniques, such as rate monotonic analysis (RMA), have provided a theoretical and practical basis for easing these onerous restrictions. But RMA and its kindred have two limitations: they apply only to verifying the requirement of schedulability (that tasks meet their deadlines) and they cannot be applied to many common programming paradigms. We address both these limitations by applying model checking, a technique with successful industrial applications in hardware design. Model checking algorithms analyze finite state machines, either by explicit state enumeration or by symbolic manipulation. Since quantitative timing properties involve a potentially unbounded state variable (a clock), our first problem is to construct a finite approximation that is conservative for the properties being analyzed-if the approximation satisfies the properties of interest, so does the infinite model. To reduce the potential for state space explosion we must further optimize this finite model. Experiments with some simple optimizations have yielded a hundred-fold efficiency improvement over published techniques.

  13. Practical Type Checking of Functions Defined on Context-Free Languages

    Institute of Scientific and Technical Information of China (English)

    Hai-Ming Chen; Yun-Mei Dong

    2004-01-01

    A type checking method for the functional language LFC is presented. A distinct feature of LFC is that it uses Context-Free (CF) languages as data types to represent compound data structures. This makes LFC a dynamically typed language. To improve efficiency, a practical type checking method is presented, which consists of both static and dynamic type checking. Although the inclusion relation of CF languages is not decidable, a special subset of the relation is decidable, i.e., the sentential form relation, which can be statically checked. Moreover, most of the expressions in actual LFC programs appear to satisfy this relation according to the statistic data of experiments. So, despite that the static type checking is not complete, it undertakes most of the type checking task. Consequently the run-time efficiency is effectively improved. Another feature of the type checking is that it converts the expressions with implicit structures to structured representation. Structure reconstruction technique is presented.

  14. Advanced techniques for efficient data integrity checking

    DEFF Research Database (Denmark)

    Martinenghi, Davide

    Integrity constraint checking, understood as the verification of data correctness and well-formedness conditions that must be satisfied in any state of a database, is not fully supported by current database technology. In a typical scenario, a database is required to comply with given semantic...... criteria (the integrity constraints) and to maintain the compliance each time data are updated. Since the introduction of the SQL2 standard, the SQL language started supporting assertions, which allow one to define general data consistency requirements expressing arbitrarily complex “business rules......” that may go beyond predefined constraints such as primary keys and foreign keys. General integrity constraints are, however, far from being widely available in commercial systems; in fact, their usage is commonly not encouraged, since the database management system would not be able to provide...

  15. A new approach to hull consistency

    Directory of Open Access Journals (Sweden)

    Kolev Lubomir

    2016-06-01

    Full Text Available Hull consistency is a known technique to improve the efficiency of iterative interval methods for solving nonlinear systems describing steady-states in various circuits. Presently, hull consistency is checked in a scalar manner, i.e. successively for each equation of the nonlinear system with respect to a single variable. In the present poster, a new more general approach to implementing hull consistency is suggested which consists in treating simultaneously several equations with respect to the same number of variables.

  16. Anonymity control in electronic check systems

    Institute of Scientific and Technical Information of China (English)

    Ma Chunguang; Yang Yixian; Hu Zhengming

    2005-01-01

    Electronic check systems, as one of electronic payment systems, are more desirable than other electronic cash systems. In the system, only a single check is used to pay any price that is not more than the face value. The main problem in check systems is to design an efficient refund mechanism that makes refund checks undistinguished from initial checks during payment and deposit. The problem of anonymity control also called fairness is also an important issue in check systems. All check systems yet are unconditional anonymity that opens the door to misuse for crime such as laundering and blackmailing. In this paper, the notion of anonymity revocation is introduced to electronic check system for the first time, and a model of fair electronic check system is proposed. An efficient fair online electronic check system with reusable refund is presented. In the system, a passive trustee is employed to revoke the anonymity of un-honest users. Moreover, the system solves the reusability problem of refunds thanks to the RSA-based partially signature. The system is efficient and meets all basic security requirements.

  17. Compositional encoding for bounded model checking

    Institute of Scientific and Technical Information of China (English)

    Jun SUN; Yang LIU; Jin Song DONG; Jing SUN

    2008-01-01

    Verification techniques like SAT-based bounded model checking have been successfully applied to a variety of system models. Applying bounded model checking to compositional process algebras is, however, a highly non-trivial task. One challenge is that the number of system states for process algebra models is not statically known, whereas exploring the full state space is computa-tionally expensive. This paper presents a compositional encoding of hierarchical processes as SAT problems and then applies state-of-the-art SAT solvers for bounded model checking. The encoding avoids exploring the full state space for complex systems so as to deal with state space explosion. We developed an automated analyzer which combines complementing model checking tech-niques (I.e., bounded model checking and explicit on-the-fly model checking) to validate system models against event-based temporal properties. The experiment results show the analyzer handles large systems.

  18. Check valve slam analysis in pumping station

    Science.gov (United States)

    Himr, D.; Habán, V.; Dokoupil, P.

    2016-03-01

    Pumping station supplies water for technological process. The check valve in the station was replaced with a new one. The regular test of black out discovered the high pressure pulsations accompanied with noticeable pipeline movement of discharge pipe. It was caused by late check valve closing, probably, when the back flow reached the highest possible velocity. This statement was supported with analysis of results of pressure measurement near the check valve and with a numerical simulation of the flow in the pipeline system.

  19. ErrorCheck: A New Method for Controlling the Accuracy of Pose Estimates

    DEFF Research Database (Denmark)

    Holm, Preben Hagh Strunge; Petersen, Henrik Gordon

    2011-01-01

    In this paper, we present ErrorCheck, which is a new method for controlling the accuracy of a computer vision based pose refinement method. ErrorCheck consists of a way for validating robustness of a pose refinement method towards false correspondences and a way of controlling the accuracy...... of a validated pose refinement method. ErrorCheck uses a theoretical estimate of the pose error covariance both for validating robustness and controlling the accuracy.We illustrate the first usage of ErrorCheck by applying it to state-of-the-art methods for pose refinement and some variations of these methods...

  20. QuickChecking Static Analysis Properties

    DEFF Research Database (Denmark)

    Midtgaard, Jan; Møller, Anders

    2015-01-01

    A static analysis can check programs for potential errors. A natural question that arises is therefore: who checks the checker? Researchers have given this question varying attention, ranging from basic testing techniques, informal monotonicity arguments, thorough pen-and-paper soundness proofs......, to verified fixed point checking. In this paper we demonstrate how quickchecking can be useful for testing a range of static analysis properties with limited effort. We show how to check a range of algebraic lattice properties, to help ensure that an implementation follows the formal specification...

  1. Radiation therapy plan checks in a paperless clinic.

    Science.gov (United States)

    Siochi, R Alfredo; Pennington, Edward C; Waldron, Timothy J; Bayouth, John E

    2009-01-27

    Traditional quality assurance checks of a patient's radiation therapy plan involve printing out treatment parameters from the treatment planning system and the "record and verify" (R&V) system and visually checking the information for one-to-one correspondence. In a paperless environment, one can automate this process through independent software that can read the treatment planning data directly and compare it against the parameters in the R&V system's database. In addition to verifying the data integrity, it is necessary to check the logical consistency of the data and the accuracy of various calculations. The results are then imported into the patient's electronic medical record. Appropriate workflows must be developed to ensure that no steps of the QA process are missed. This paper describes our electronic QA system (EQS), consisting of in-house software and workflows. The EQS covers 3D conformal and intensity modulated radiation therapy, electrons, stereotactic radiosurgery, total body irradiation, and clinical set ups with and without virtual simulation. The planning systems handled by our EQS are ADAC Pinnacle and Varian FASTPLAN, while the R&V systems are LANTIS and VARIS. The improvement in our plan check process over the paperless system is described in terms of the types of detected errors. The potential problems with the implementation and use of the EQS, as well as workarounds for data that are not easily accessible through electronic means, are described.

  2. 14 CFR 91.1093 - Initial and transition training and checking: Check pilots (aircraft), check pilots (simulator).

    Science.gov (United States)

    2010-01-01

    ... OPERATING RULES GENERAL OPERATING AND FLIGHT RULES Fractional Ownership Operations Program Management § 91... preceding 24 months, that person satisfactorily conducts a proficiency or competency check under the..., and emergency procedures to ensure competence to conduct the pilot flight checks required by...

  3. Heteroscedasticity checks for regression models

    Institute of Scientific and Technical Information of China (English)

    ZHU; Lixing

    2001-01-01

    [1]Carroll, R. J., Ruppert, D., Transformation and Weighting in Regression, New York: Chapman and Hall, 1988.[2]Cook, R. D., Weisberg, S., Diagnostics for heteroscedasticity in regression, Biometrika, 1988, 70: 1—10.[3]Davidian, M., Carroll, R. J., Variance function estimation, J. Amer. Statist. Assoc., 1987, 82: 1079—1091.[4]Bickel, P., Using residuals robustly I: Tests for heteroscedasticity, Ann. Statist., 1978, 6: 266—291.[5]Carroll, R. J., Ruppert, D., On robust tests for heteroscedasticity, Ann. Statist., 1981, 9: 205—209.[6]Eubank, R. L., Thomas, W., Detecting heteroscedasticity in nonparametric regression, J. Roy. Statist. Soc., Ser. B, 1993, 55: 145—155.[7]Diblasi, A., Bowman, A., Testing for constant variance in a linear model, Statist. and Probab. Letters, 1997, 33: 95—103.[8]Dette, H., Munk, A., Testing heteoscedasticity in nonparametric regression, J. R. Statist. Soc. B, 1998, 60: 693—708.[9]Müller, H. G., Zhao, P. L., On a semi-parametric variance function model and a test for heteroscedasticity, Ann. Statist., 1995, 23: 946—967.[10]Stute, W., Manteiga, G., Quindimil, M. P., Bootstrap approximations in model checks for regression, J. Amer. Statist. Asso., 1998, 93: 141—149.[11]Stute, W., Thies, G., Zhu, L. X., Model checks for regression: An innovation approach, Ann. Statist., 1998, 26: 1916—1939.[12]Shorack, G. R., Wellner, J. A., Empirical Processes with Applications to Statistics, New York: Wiley, 1986.[13]Efron, B., Bootstrap methods: Another look at the jackknife, Ann. Statist., 1979, 7: 1—26.[14]Wu, C. F. J., Jackknife, bootstrap and other re-sampling methods in regression analysis, Ann. Statist., 1986, 14: 1261—1295.[15]H rdle, W., Mammen, E., Comparing non-parametric versus parametric regression fits, Ann. Statist., 1993, 21: 1926—1947.[16]Liu, R. Y., Bootstrap procedures under some non-i.i.d. models, Ann. Statist., 1988, 16: 1696—1708.[17

  4. Chip Multithreaded Consistency Model

    Institute of Scientific and Technical Information of China (English)

    Zu-Song Li; Dan-Dan Huan; Wei-Wu Hu; Zhi-Min Tang

    2008-01-01

    Multithreaded technique is the developing trend of high performance processor. Memory consistency model is essential to the correctness, performance and complexity of multithreaded processor. The chip multithreaded consistency model adapting to multithreaded processor is proposed in this paper. The restriction imposed on memory event ordering by chip multithreaded consistency is presented and formalized. With the idea of critical cycle built by Wei-Wu Hu, we prove that the proposed chip multithreaded consistency model satisfies the criterion of correct execution of sequential consistency model. Chip multithreaded consistency model provides a way of achieving high performance compared with sequential consistency model and ensures the compatibility of software that the execution result in multithreaded processor is the same as the execution result in uniprocessor. The implementation strategy of chip multithreaded consistency model in Godson-2 SMT processor is also proposed. Godson-2 SMT processor supports chip multithreaded consistency model correctly by exception scheme based on the sequential memory access queue of each thread.

  5. Automatization and familiarity in repeated checking

    NARCIS (Netherlands)

    Dek, E.C.P.|info:eu-repo/dai/nl/313959552; van den Hout, M.A.|info:eu-repo/dai/nl/070445354; Giele, C.L.|info:eu-repo/dai/nl/318754460; Engelhard, I.M.|info:eu-repo/dai/nl/239681533

    2015-01-01

    Repetitive, compulsive-like checking of an object leads to reductions in memory confidence, vividness, and detail. Experimental research suggests that this is caused by increased familiarity with perceptual characteristics of the stimulus and automatization of the checking procedure (Dek, van den Ho

  6. 7 CFR 58.243 - Checking quality.

    Science.gov (United States)

    2010-01-01

    ... Procedures § 58.243 Checking quality. All milk, milk products and dry milk products shall be subject to... aid to quality control in addition to the regular routine analysis made on the finished products. ... 7 Agriculture 3 2010-01-01 2010-01-01 false Checking quality. 58.243 Section 58.243...

  7. 32 CFR 635.6 - Name checks.

    Science.gov (United States)

    2010-07-01

    ... military police records may be released under the provisions of AR 340-21 to authorized personnel for valid... with AR 340-21. (b) Checks will be accomplished by a review of the COPS MPRS. Information will be... police reports filed worldwide. Authorized users of COPS MPRS can conduct name checks for...

  8. Tractor Mechanic Check Sheets for Modules.

    Science.gov (United States)

    Clemson Univ., SC. Vocational Education Media Center.

    Forms for student self-checks and the instructor's final checklist (student evaluation) are provided for use with thirty-three learning modules on maintaining and servicing fuel and electrical systems in tractor mechanics. The student self-check asks the students questions about their understanding of the modules' content. The instructor's…

  9. SPEED ROLLER STAND MEASUREMENT SYSTEM CHECKING TECHNIQUE

    OpenAIRE

    Zybtsev, Y.; I. Marmut

    2011-01-01

    The study has shown that the accuracy of brakes checking by inertial stands depends upon the applied methods of measurement of braking parameters (stand slowing down, braking distance, brakes triggering time, current speed) as well as the methods of metrological checking of measuring system canals.

  10. Consistency check of charged hadron multiplicities and fragmentation functions in SIDIS

    Directory of Open Access Journals (Sweden)

    Dong-Jing Yang

    2016-04-01

    Full Text Available We derived the conditions on certain combinations of integrals of the fragmentation functions of pion using HERMES data for the sum of the charged pion multiplicities from semi-inclusive deep-inelastic scattering (SIDIS off the deuteron target. In our derivation the nucleon parton distribution functions (PDFs are assumed to be isospin SU(2 symmetric. Similar conditions have also been obtained for the fragmentation functions (FFs of kaon by the sum of charged kaon multiplicities as well. We have chosen several FFs to study the impact of those conditions we have derived. Among those FFs, we find that the fragmentation functions produced by the nonlocal chiral-quark model (NLχQM constantly satisfy the conditions. Furthermore, the ratios of the strange PDFs S(x,Q2 and the non-strange PDFs Q(x,Q2 extracted from the charged pion and kaon multiplicities differ from each other significantly. Finally, we demonstrate that the HERMES pion multiplicity data are unlikely to be compatible with two widely-used PDFs, namely CTEQ6L and leading order NNPDF3.0.

  11. 14 CFR 91.1089 - Qualifications: Check pilots (aircraft) and check pilots (simulator).

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Qualifications: Check pilots (aircraft) and check pilots (simulator). 91.1089 Section 91.1089 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... RULES Fractional Ownership Operations Program Management § 91.1089 Qualifications: Check...

  12. Enriched MU-Calculi Module Checking

    CERN Document Server

    Ferrante, Alessandro; Parente, Mimmo

    2008-01-01

    The model checking problem for open systems has been intensively studied in the literature, for both finite-state (module checking) and infinite-state (pushdown module checking) systems, with respect to Ctl and Ctl*. In this paper, we further investigate this problem with respect to the Mu-calculus enriched with nominals and graded modalities (hybrid graded Mu-calculus), in both the finite-state and infinite-state settings. Using an automata-theoretic approach, we show that hybrid graded Mu-calculus module checking is solvable in exponential time, while hybrid graded Mu-calculus pushdown module checking is solvable in double-exponential time. These results are also tight since they match the known lower bounds for Ctl. We also investigate the module checking problem with respect to the hybrid graded Mu-calculus enriched with inverse programs (Fully enriched Mu-calculus): by showing a reduction from the domino problem, we show its undecidability. We conclude with a short overview of the model checking problem ...

  13. Engineering Abstractions in Model Checking and Testing

    DEFF Research Database (Denmark)

    Achenbach, Michael; Ostermann, Klaus

    2009-01-01

    Abstractions are used in model checking to tackle problems like state space explosion or modeling of IO. The application of these abstractions in real software development processes, however, lacks engineering support. This is one reason why model checking is not widely used in practice yet...... and testing is still state of the art in falsification. We show how user-defined abstractions can be integrated into a Java PathFinder setting with tools like AspectJ or Javassist and discuss implications of remaining weaknesses of these tools. We believe that a principled engineering approach to designing...... and implementing abstractions will improve the applicability of model checking in practice....

  14. QuickChecking Static Analysis Properties

    DEFF Research Database (Denmark)

    Midtgaard, Jan; Møller, Anders

    2015-01-01

    , to verified fixed point checking. In this paper we demonstrate how quickchecking can be useful for testing a range of static analysis properties with limited effort. We show how to check a range of algebraic lattice properties, to help ensure that an implementation follows the formal specification...... of a lattice. Moreover, we offer a number of generic, type-safe combinators to check transfer functions and operators on lattices, to help ensure that these are, e.g., monotone, strict, or invariant. We substantiate our claims by quickchecking a type analysis for the Lua programming language...

  15. Modeling and Testing Legacy Data Consistency Requirements

    DEFF Research Database (Denmark)

    Nytun, J. P.; Jensen, Christian Søndergaard

    2003-01-01

    An increasing number of data sources are available on the Internet, many of which offer semantically overlapping data, but based on different schemas, or models. While it is often of interest to integrate such data sources, the lack of consistency among them makes this integration difficult....... This paper addresses the need for new techniques that enable the modeling and consistency checking for legacy data sources. Specifically, the paper contributes to the development of a framework that enables consistency testing of data coming from different types of data sources. The vehicle is UML and its...... accompanying XMI. The paper presents techniques for modeling consistency requirements using OCL and other UML modeling elements: it studies how models that describe the required consistencies among instances of legacy models can be designed in standard UML tools that support XMI. The paper also considers...

  16. No consistent bimetric gravity?

    CERN Document Server

    Deser, S; Waldron, A

    2013-01-01

    We discuss the prospects for a consistent, nonlinear, partially massless (PM), gauge symmetry of bimetric gravity (BMG). Just as for single metric massive gravity, ultimate consistency of both BMG and the putative PM BMG theory relies crucially on this gauge symmetry. We argue, however, that it does not exist.

  17. Health Check Tools: MedlinePlus

    Science.gov (United States)

    ... and Teen (Centers for Disease Control and Prevention) Osteoporosis Check Up On Your Bones (National Institute of ... Eye Discharge (DSHI Systems) Eye Redness (DSHI Systems) Pregnancy and Nutrition Daily Food Plan for Moms (Department ...

  18. CMM Interim Check Design of Experiments (U)

    Energy Technology Data Exchange (ETDEWEB)

    Montano, Joshua Daniel [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2015-07-29

    Coordinate Measuring Machines (CMM) are widely used in industry, throughout the Nuclear Weapons Complex and at Los Alamos National Laboratory (LANL) to verify part conformance to design definition. Calibration cycles for CMMs at LANL are predominantly one year in length and include a weekly interim check to reduce risk. The CMM interim check makes use of Renishaw’s Machine Checking Gauge which is an off-the-shelf product simulates a large sphere within a CMM’s measurement volume and allows for error estimation. As verification on the interim check process a design of experiments investigation was proposed to test a couple of key factors (location and inspector). The results from the two-factor factorial experiment proved that location influenced results more than the inspector or interaction.

  19. Check List: Are You a Gifted Principal?

    Science.gov (United States)

    Taylor, Vicki L.

    1984-01-01

    An 18-item check list is provided for principals to evaluate themselves relative to encouraging gifts and talents of their most able students. Suggestions are given in the areas of educational needs, specialized materials, and counseling. (MC)

  20. A Check List for the Reading Teacher.

    Science.gov (United States)

    Gemake, Josephine S.

    1979-01-01

    Presents a check list created by teachers to be used as an evaluation instrument in observations of reading laboratories in the New York City area. Reflects their ideas about the essential components of a remedial reading program. (FL)

  1. Notification: Purchase Card and Convenience Check Audit

    Science.gov (United States)

    Project #OA-FY13-0116, April 11, 2013. The U.S. Environmental Protection Agency, Office of Inspector General, is beginning the fieldwork phase of its audit of the agency’s purchase card and convenience check programs.

  2. Survey on the presence of 90Sr in milk samples by a validated ultra low level liquid scintillation counting (LSC method

    Directory of Open Access Journals (Sweden)

    dell’Oro D.

    2013-04-01

    Full Text Available 90Sr is one of the most biologically hazardous radionuclides produced in nuclear fission processes and decays emitting high-energy beta particles turning 90Y. 90Sr is transferred from soil-plant to cow’s milk and then to humans if it is introduced into the environment. Radiostrontium is chemically similar to calcium entering the human body through several food chains and depositing in bone and blood-forming tissue (bone marrow. Among main foodstuffs assumed in human diet, milk is considered of special interest for radiostrontium determination, especially in emergency situations, because the consumption of contaminated milk is the main source of internal radiation exposure, particularly for infants. In this work an analytical method for the determination of radiostrontium in milk was developed and validated in order to determine low activity levels by liquid scintillation counting (LSC after achieving 90Y secular equilibrium condition. The analytical procedure was applied both in surveillance and routine programmes to detect radiocontamination in cow’s, goat and sheep milk samples.

  3. Perceived social presence reduces fact-checking

    OpenAIRE

    Jun, Youjung; Meng, Rachel; Johar, Gita Venkataramani

    2017-01-01

    The dissemination of unverified content (e.g., ���fake��� news) is a societal problem with influence that can acquire tremendous reach when propagated through social networks. This article examines how evaluating information in a social context affects fact-checking behavior. Across eight experiments, people fact-checked less often when they evaluated claims in a collective (e.g., group or social media) compared with an individual setting. Inducing momentary vigilance increased the rate of fa...

  4. Automated quality checks on repeat prescribing.

    OpenAIRE

    Rogers, Jeremy E; Wroe, Christopher J; Roberts, Angus; Swallow, Angela; Stables, David; Cantrill, Judith A; Rector, Alan L.

    2003-01-01

    BACKGROUND: Good clinical practice in primary care includes periodic review of repeat prescriptions. Markers of prescriptions that may need review have been described, but manually checking all repeat prescriptions against the markers would be impractical. AIM: To investigate the feasibility of computerising the application of repeat prescribing quality checks to electronic patient records in United Kingdom (UK) primary care. DESIGN OF STUDY: Software performance test against benchmark manual...

  5. Semantic Importance Sampling for Statistical Model Checking

    Science.gov (United States)

    2015-01-16

    approach called Statistical Model Checking (SMC) [16], which relies on Monte - Carlo -based simulations to solve this verification task more scalably...Conclusion Statistical model checking (SMC) is a prominent approach for rigorous analysis of stochastic systems using Monte - Carlo simulations. In this... Monte - Carlo simulations, for computing the bounded probability that a specific event occurs during a stochastic system’s execution. Estimating the

  6. Design of Bidirectional Check Valve for Discrete Fluid Power Force System for Wave Energy Converters

    DEFF Research Database (Denmark)

    Hansen, Anders Hedegaard; Pedersen, Henrik C.; Andersen, Torben Ole

    2014-01-01

    Discrete fluid power force systems consisting of a multichamber cylinder, a witching manifold and common pressure lines have been proposed as a technology for increasing the efficiency of the power take off system in ocean wave energy converters. However the force shifting of these discrete systems...... enables passive force switching under minimal pressure difference, hence minimal energy loss. The bidirectional check valve is designed with a rated flow in the range of 1000L/min@5bar. The flow direction of the bidirectional check valve is set by the setting the pilot pressure. This paper presents...... a functionality test of a 125 L/min@5bar bidirectional check, leading to the design and modelling of a bidirectional check valve for ocean wave energy. It shows that a feasible bidirectional check valve may be configured by employing a multi-poppet topology for the main stage and utilising a 3/2 switching valve...

  7. A Succinct Approach to Static Analysis and Model Checking

    DEFF Research Database (Denmark)

    Filipiuk, Piotr

    In a number of areas software correctness is crucial, therefore it is often desirable to formally verify the presence of various properties or the absence of errors. This thesis presents a framework for concisely expressing static analysis and model checking problems. The framework facilitates...... in the classical formulation of ALFP logic. Finally, we show that the logics and the associated solvers can be used for rapid prototyping. We illustrate that by a variety of case studies from static analysis and model checking....... rapid prototyping of new analyses and consists of variants of ALFP logic and associated solvers. First, we present a Lattice based Least Fixed Point Logic (LLFP) that allows interpretations over complete lattices satisfying Ascending Chain Condition. We establish a Moore Family result for LLFP...

  8. Analysis of DIRAC's behavior using model checking with process algebra

    CERN Document Server

    Remenska, Daniela; Willemse, Tim; Bal, Henri; Verstoep, Kees; Fokkink, Wan; Charpentier, Philippe; Diaz, Ricardo Graciani; Lanciotti, Elisa; Roiser, Stefan; Ciba, Krzysztof

    2012-01-01

    DIRAC is the grid solution developed to support LHCb production activities as well as user data analysis. It consists of distributed services and agents delivering the workload to the grid resources. Services maintain database back-ends to store dynamic state information of entities such as jobs, queues, staging requests, etc. Agents use polling to check and possibly react to changes in the system state. Each agent's logic is relatively simple, the main complexity lies in their cooperation. Agents run concurrently, and collaborate using the databases as shared memory. The databases can be accessed directly by the agents if running locally or through a DIRAC service interface if necessary. This shared-memory model causes entities to occasionally get into inconsistent states. Tracing and fixing such problems becomes formidable due to the inherent parallelism present. We propose more rigorous methods to cope with this. Model checking is one such technique for analysis of an abstract model of a system. Unlike con...

  9. Asymptomatic brain tumor detected at brain check-up

    Energy Technology Data Exchange (ETDEWEB)

    Onizuka, Masanari; Suyama, Kazuhiko; Shibayama, Akira; Hiura, Tsuyoshi; Horie, Nobutaka; Miyazaki, Hisaya [Sankoukai Miyazaki Hospital, Isahaya, Nagasaki (Japan)

    2001-09-01

    Brain check-up was performed in 4000 healthy subjects who underwent medical and radiological examinations for possible brain diseases in our hospital from April 1996 to March 2000. Magnetic resonance imaging revealed 11 brain tumors which consisted of six meningiomas, three pituitary adenomas, one astrocytoma, and one epidermoid cyst. The detection rate of incidental brain tumor in our hospital was 0.3%. Nine patients underwent surgery, with one case of morbidity due to postoperative transient oculomotor nerve paresis. The widespread use of brain check-up may increasingly detect asymptomatic brain tumors. Surgical indications for such lesions remain unclear, and the strategy for treatment should be determined with consideration of the patient's wishes. (author)

  10. Spectral Shape of Check-Hybrid GLDPC Codes

    CERN Document Server

    Paolini, Enrico; Chiani, Marco; Fossorier, Marc P C

    2010-01-01

    This paper analyzes the asymptotic exponent of both the weight spectrum and the stopping set size spectrum for a class of generalized low-density parity-check (GLDPC) codes. Specifically, all variable nodes (VNs) are assumed to have the same degree (regular VN set), while the check node (CN) set is assumed to be composed of a mixture of different linear block codes (hybrid CN set). A simple expression for the exponent (which is also referred to as the growth rate or the spectral shape) is developed. This expression is consistent with previous results, including the case where the normalized weight or stopping set size tends to zero. Furthermore, it is shown how certain symmetry properties of the local weight distribution at the CNs induce a symmetry in the overall weight spectral shape function.

  11. Dynamic Consistency between Value and Coordination Models - Research Issues.

    NARCIS (Netherlands)

    Bodenstaff, L.; Wombacher, Andreas; Reichert, M.U.; meersman, R; Tari, Z; herrero, p

    Inter-organizational business cooperations can be described from different viewpoints each fulfilling a specific purpose. Since all viewpoints describe the same system they must not contradict each other, thus, must be consistent. Consistency can be checked based on common semantic concepts of the

  12. Prizes for consistency

    Energy Technology Data Exchange (ETDEWEB)

    Hiscock, S.

    1986-07-01

    The importance of consistency in coal quality has become of increasing significance recently, with the current trend towards using coal from a range of sources. A significant development has been the swing in responsibilities for coal quality. The increasing demand for consistency in quality has led to a re-examination of where in the trade and transport chain the quality should be assessed and where further upgrading of inspection and preparation facilities are required. Changes are in progress throughout the whole coal transport chain which will improve consistency of delivered coal quality. These include installation of beneficiation plant at coal mines, export terminals, and on the premises of end users. It is suggested that one of the keys to success for the coal industry will be the ability to provide coal of a consistent quality.

  13. Consistent sets contradict

    CERN Document Server

    Kent, A

    1996-01-01

    In the consistent histories formulation of quantum theory, the probabilistic predictions and retrodictions made from observed data depend on the choice of a consistent set. We show that this freedom allows the formalism to retrodict several contradictory propositions which correspond to orthogonal commuting projections and which all have probability one. We also show that the formalism makes contradictory probability one predictions when applied to generalised time-symmetric quantum mechanics.

  14. Psychometric Properties of a Tool to Measure Nurses' Attitudes to Single Checking Medications: SCAMS-II.

    Science.gov (United States)

    Cross, Rachel; Bennett, Paul N; Ockerby, Cherene; Busija, Lucy; Currey, Judy

    2015-12-01

    Single checking medications has been increasingly adopted over the past decade by nurses in Australian healthcare services. However, attitudes toward the practice of only one nurse checking medications remain unclear. The aim of this article is to report on the development, reliability, and validity of a tool to measure nurses' attitudes to single checking medications in a health service in which single checking has been in place for over a decade. In a cross-sectional survey design, the Single Checking and Administration of Medications Scale (SCAMS-II) was used to measure the attitudes of 299 registered nurses (RNs) who were single checking medications in one metropolitan teaching hospital in Australia. Exploratory factor analysis was used to explore the dimensions that best represented the SCAMS-II. Cronbach's α was used to assess internal consistency of the identified subscales. To test the construct validity of the emergent questionnaire, Confirmatory Factor Analysis and Rasch analyses were performed. The psychometric properties of the SCAMS-II revealed 12 items with three reliable subscales: a five-item accountability model; a four-item efficiency model; and a three-item knowledge model. In settings where single checking is current practice, the SCAMS-II is recommended as a reliable tool to measure nurses' attitudes toward the single checking of medications. The findings from this study may assist healthcare organizations in the development of policy and procedure guidelines for the safe administration of medications. © 2015 Sigma Theta Tau International.

  15. A PSL Bounded Model Checking Method

    Institute of Scientific and Technical Information of China (English)

    YU Lei; ZHAO Zongtao

    2012-01-01

    SAT-based bounded model checking (BMC) is introduced as an important complementary technique to OBDD-based symbolic model checking, and is an efficient verification method for parallel and reactive systems. However, until now the properties verified by bounded model checking are very finite. Temporal logic PSL is a property specification language (IEEE-1850) describing parallel systems and is divided into two parts, i.e. the linear time logic FL and the branch time logic OBE. In this paper, the specification checked by BMC is extended to PSL and its algorithm is also proposed. Firstly, define the bounded semantics of PSL, and then reduce the bounded semantics into SAT by translating PSL specification formula and the state transition relation of the system to the propositional formula A and B, respectively. Finally, verify the satisfiability of the conjunction propositional formula of A and B. The algorithm results in the translation of the existential model checking of the temporal logic PSL into the satisfiability problem of propositional formula. An example of a queue controlling circuit is used to interpret detailedly the executing procedure of the algorithm.

  16. Moderate-Density Parity-Check Codes

    CERN Document Server

    Ouzan, Samuel

    2009-01-01

    We propose a new type of short to moderate block-length, linear error-correcting codes, called moderate-density parity-check (MDPC) codes. The number of ones of the parity-check matrix of the codes presented is typically higher than the number of ones of the parity-check matrix of low-density parity-check (LDPC) codes. But, still lower than those of the parity-check matrix of classical block codes. The proposed MDPC codes are cyclic and are designed by constructing idempotents using cyclotomic cosets. The construction is simple and allows finding short block-length, high-rate codes with good minimum distance. Inspired by some recent iterative soft-input soft-output (SISO) decoders used in a context of classical block codes, we propose a low complexity, efficient, iterative decoder called Auto-Diversity (AD) decoder. AD decoder is based on belief propagation (BP) decoder and takes advantage of the fundamental property of automorphism group of the constructed cyclic code.

  17. Network Consistent Data Association.

    Science.gov (United States)

    Chakraborty, Anirban; Das, Abir; Roy-Chowdhury, Amit K

    2016-09-01

    Existing data association techniques mostly focus on matching pairs of data-point sets and then repeating this process along space-time to achieve long term correspondences. However, in many problems such as person re-identification, a set of data-points may be observed at multiple spatio-temporal locations and/or by multiple agents in a network and simply combining the local pairwise association results between sets of data-points often leads to inconsistencies over the global space-time horizons. In this paper, we propose a Novel Network Consistent Data Association (NCDA) framework formulated as an optimization problem that not only maintains consistency in association results across the network, but also improves the pairwise data association accuracies. The proposed NCDA can be solved as a binary integer program leading to a globally optimal solution and is capable of handling the challenging data-association scenario where the number of data-points varies across different sets of instances in the network. We also present an online implementation of NCDA method that can dynamically associate new observations to already observed data-points in an iterative fashion, while maintaining network consistency. We have tested both the batch and the online NCDA in two application areas-person re-identification and spatio-temporal cell tracking and observed consistent and highly accurate data association results in all the cases.

  18. Check dams effects on sediment transport in steep slope flume

    Science.gov (United States)

    Piton, Guillaume; Recking, Alain

    2014-05-01

    Depending on many influences (geology, relief, hydrology, land use, etc.) some mountainous watershed are prone to cause casualties and facilities damages. Large amounts of sediments episodically released by torrents are often the biggest problem in torrent related hazard mitigation. Series of transversal structures as check dams and ground sills are often used in the panel of risk mitigation technics. A large literature exits on check dams and it mainly concerns engineering design, e.g. toe scouring, stability stress diagram, changes in upper and lower reaches equilibrium slopes. Check dams in steep slope rivers constitute fixed points in the bed profile and prevent general bed incision. However their influence on sediment transport once they are filled is not yet clear. Two flume test campaigns, synthetize in Table 1, were performed to investigate this question: Table 1 : experiment plan Run (duration) Ref1 (50h)CD1a (30h)CD1b (30h)Ref2 (92h)CD2 (18h) Solid feeding discharge (g.s^-1) 44 44 44 60 60 Number of check dams none 1 3 none 2 A nearly 5-m-long, 10-cm-wide and 12%-steep flume was used. The water discharge was set to 0,55 l/s in all runs. A mixture of poorly sorted natural sediments with diameters between 0.8 and 40 mm was used. An open solid-discharge-feeding circuit kept the inlet sediment flux constant during all experiments. As both feeding rates did not present variation, changes in outlet solid discharge were assumed to be due to bed variations in the bed storage. We observed strong fluctuations of solid flux and slope in each reaches of all runs between: (i) steep aggradating armoured bed and (ii) less steep and finer bed releasing bedload sheets during erosion events and inducing bedload pulses. All experiments showed consistent results: transported volume associated with erosion event decreased with the length between two subsequent check dams. Solid transversal structures shorten the upstream erosion-propagation and avoid downstream change in the

  19. Static Checking of Interrupt-driven Software

    DEFF Research Database (Denmark)

    Brylow, Dennis; Damgaard, Niels; Palsberg, Jens

    2001-01-01

    in a few seconds on a standard PC. Our tool is one of the first to give an efficient and useful static analysis of assembly code. It enables increased confidence in correctness, significantly reduced testing requirements, and support for maintenance throughout the system life-cycle....... require extensive brute-force testing, making development and maintenance costly. This is particularly true for system components that are written in assembly language. Static checking has the potential of alleviating these problems, but until now there has been little tool support for programming...... fundamental safety and liveness properties. Our approach is based on a known algorithm for model checking of pushdown systems, and produces a control-flow graph annotated with information about time, space, safety, and liveness. Each benchmark is approximately 1000 lines of code, and the checking is done...

  20. Checking Timed Automata for Linear Duration Properties

    Institute of Scientific and Technical Information of China (English)

    赵建华

    2000-01-01

    It is proved in this paper that checking a timed automaton M with respect to a linear duration property D can be done by investigating only the integral timed states of M. An equivalence relation is introduced in this paper to divide the infinite number of integral timed states into finite number of equivalence classes. Based on this, a method is proposed for checking whether M satisfies D. In some cases, the number of equivalence classes is too large for a computer to manipulate. A technique for reducing the search-space for checking linear duration property is also described. This technique is more suitable for the case in this paper than those in the literature because most of those techniques are designed for reachability analysis.

  1. Glovebox pressure relief and check valve

    Energy Technology Data Exchange (ETDEWEB)

    Blaedel, K.L.

    1986-03-17

    This device is a combined pressure relief valve and check valve providing overpressure protection and preventing back flow into an inert atmosphere enclosure. The pressure relief is embodied by a submerged vent line in a mercury reservior, the releif pressure being a function of the submerged depth. The pressure relief can be vented into an exhaust system and the relieving pressure is only slightly influenced by the varying pressure in the exhaust system. The check valve is embodied by a ball which floats on the mercury column and contacts a seat whenever vacuum exists within the glovebox enclosure. Alternatively, the check valve is embodied by a vertical column of mercury, the maximum back pressure being a function of the height of the column of mercury.

  2. Graded CTL Model Checking for Test Generation

    CERN Document Server

    Napoli, Margherita

    2011-01-01

    Recently there has been a great attention from the scientific community towards the use of the model-checking technique as a tool for test generation in the simulation field. This paper aims to provide a useful mean to get more insights along these lines. By applying recent results in the field of graded temporal logics, we present a new efficient model-checking algorithm for Hierarchical Finite State Machines (HSM), a well established symbolism long and widely used for representing hierarchical models of discrete systems. Performing model-checking against specifications expressed using graded temporal logics has the peculiarity of returning more counterexamples within a unique run. We think that this can greatly improve the efficacy of automatically getting test cases. In particular we verify two different models of HSM against branching time temporal properties.

  3. Long Term Implementation of a 100 Percent Checked Baggage Screening System: A Value Focused Thinking Approach

    Science.gov (United States)

    2003-03-01

    baggage checking system. The checked baggage system in place at Dayton International Airport is an interim solution. EDS and explosive trace detection machines...system will include detection equipment such as Explosive Trace Detection (ETD) systems, EDS machines, conveyor systems, and operators necessary to run...4.1.1 Terminal Floor System – Interim as of 31 December 2002 This interim system consists of the placement of EDS and Explosive Trace Detection machines

  4. CMB lens sample covariance and consistency relations

    Science.gov (United States)

    Motloch, Pavel; Hu, Wayne; Benoit-Lévy, Aurélien

    2017-02-01

    Gravitational lensing information from the two and higher point statistics of the cosmic microwave background (CMB) temperature and polarization fields are intrinsically correlated because they are lensed by the same realization of structure between last scattering and observation. Using an analytic model for lens sample covariance, we show that there is one mode, separately measurable in the lensed CMB power spectra and lensing reconstruction, that carries most of this correlation. Once these measurements become lens sample variance dominated, this mode should provide a useful consistency check between the observables that is largely free of sampling and cosmological parameter errors. Violations of consistency could indicate systematic errors in the data and lens reconstruction or new physics at last scattering, any of which could bias cosmological inferences and delensing for gravitational waves. A second mode provides a weaker consistency check for a spatially flat universe. Our analysis isolates the additional information supplied by lensing in a model-independent manner but is also useful for understanding and forecasting CMB cosmological parameter errors in the extended Λ cold dark matter parameter space of dark energy, curvature, and massive neutrinos. We introduce and test a simple but accurate forecasting technique for this purpose that neither double counts lensing information nor neglects lensing in the observables.

  5. Reporting consistently on CSR

    DEFF Research Database (Denmark)

    Thomsen, Christa; Nielsen, Anne Ellerup

    2006-01-01

    of a case study showing that companies use different and not necessarily consistent strategies for reporting on CSR. Finally, the implications for managerial practice are discussed. The chapter concludes by highlighting the value and awareness of the discourse and the discourse types adopted......This chapter first outlines theory and literature on CSR and Stakeholder Relations focusing on the different perspectives and the contextual and dynamic character of the CSR concept. CSR reporting challenges are discussed and a model of analysis is proposed. Next, our paper presents the results...... in the reporting material. By implementing consistent discourse strategies that interact according to a well-defined pattern or order, it is possible to communicate a strong social commitment on the one hand, and to take into consideration the expectations of the shareholders and the other stakeholders...

  6. A Magnetic Consistency Relation

    CERN Document Server

    Jain, Rajeev Kumar

    2012-01-01

    If cosmic magnetic fields are indeed produced during inflation, they are likely to be correlated with the scalar metric perturbations that are responsible for the Cosmic Microwave Background anisotropies and Large Scale Structure. Within an archetypical model of inflationary magnetogenesis, we show that there exists a new simple consistency relation for the non-Gaussian cross correlation function of the scalar metric perturbation with two powers of the magnetic field in the squeezed limit where the momentum of the metric perturbation vanishes. We emphasize that such a consistency relation turns out to be extremely useful to test some recent calculations in the literature. Apart from primordial non-Gaussianity induced by the curvature perturbations, such a cross correlation might provide a new observational probe of inflation and can in principle reveal the primordial nature of cosmic magnetic fields.

  7. Check In / Check Out. The Public Space as an Internet of Things

    NARCIS (Netherlands)

    van t Hof, C.C.G.; van Est, R.; Daemen, F.

    2011-01-01

    Mobile phones, public transport smart cards, security cameras and GPS systems in our car - we are surrounded by digital devices. They track us, guide us, help us, and control us. The book Check In / Check Out. The Public Space as an Internet of Things shows us how our digital and physical worlds are

  8. The Effects of Check-In/Check-Out on Kindergarten Students in an Urban Setting

    Science.gov (United States)

    Sobalvarro, Adriana; Graves, Scott L., Jr.; Hughes, Tammy

    2016-01-01

    The purpose of this project was to investigate the effectiveness of Check-in/Check-out (CICO), a targeted behavioral intervention, on reducing the problem behaviors of kindergarten students in an urban setting. Participants were referred by their teacher for exhibiting disruptive classroom behaviors, which resulted in classroom removal. Results…

  9. Check In / Check Out. The Public Space as an Internet of Things

    NARCIS (Netherlands)

    van t Hof, C.C.G.; van Est, R.; Daemen, F.

    2011-01-01

    Mobile phones, public transport smart cards, security cameras and GPS systems in our car - we are surrounded by digital devices. They track us, guide us, help us, and control us. The book Check In / Check Out. The Public Space as an Internet of Things shows us how our digital and physical worlds are

  10. Can i just check...? Effects of edit check questions on measurement error and survey estimates

    NARCIS (Netherlands)

    Lugtig, Peter; Jäckle, Annette

    2014-01-01

    Household income is difficult to measure, since it requires the collection of information about all potential income sources for each member of a household.Weassess the effects of two types of edit check questions on measurement error and survey estimates: within-wave edit checks use responses to

  11. Consistency in Distributed Systems

    OpenAIRE

    Kemme, Bettina; Ramalingam, Ganesan; Schiper, André; Shapiro, Marc; Vaswani, Kapil

    2013-01-01

    International audience; In distributed systems, there exists a fundamental trade-off between data consistency, availability, and the ability to tolerate failures. This trade-off has significant implications on the design of the entire distributed computing infrastructure such as storage systems, compilers and runtimes, application development frameworks and programming languages. Unfortunately, it also has significant, and poorly understood, implications for the designers and developers of en...

  12. Geometrically Consistent Mesh Modification

    KAUST Repository

    Bonito, A.

    2010-01-01

    A new paradigm of adaptivity is to execute refinement, coarsening, and smoothing of meshes on manifolds with incomplete information about their geometry and yet preserve position and curvature accuracy. We refer to this collectively as geometrically consistent (GC) mesh modification. We discuss the concept of discrete GC, show the failure of naive approaches, and propose and analyze a simple algorithm that is GC and accuracy preserving. © 2010 Society for Industrial and Applied Mathematics.

  13. Adaptable Assertion Checking for Scientific Software Components

    Energy Technology Data Exchange (ETDEWEB)

    Dahlgren, T L; Devanbu, P T

    2004-03-12

    We present a proposal for lowering the overhead of interface contract checking for science and engineering applications. Run-time enforcement of assertions is a well-known technique for improving the quality of software; however, the performance penalty is often too high for their retention during deployment, especially for long-running applications that depend upon iterative operations. With an efficient adaptive approach the benefits of run-time checking can continue to accrue with minimal overhead. Examples from scientific software interfaces being developed in the high performance computing research community will be used to measure the efficiency and effectiveness of this approach.

  14. A Method for Model Checking Feature Interactions

    DEFF Research Database (Denmark)

    Pedersen, Thomas; Le Guilly, Thibaut; Ravn, Anders Peter;

    2015-01-01

    This paper presents a method to check for feature interactions in a system assembled from independently developed concurrent processes as found in many reactive systems. The method combines and refines existing definitions and adds a set of activities. The activities describe how to populate the ...... the definitions with models to ensure that all interactions are captured. The method is illustrated on a home automation example with model checking as analysis tool. In particular, the modelling formalism is timed automata and the analysis uses UPPAAL to find interactions....

  15. Consistent wind Facilitates Vection

    Directory of Open Access Journals (Sweden)

    Masaki Ogawa

    2011-10-01

    Full Text Available We examined whether a consistent haptic cue suggesting forward self-motion facilitated vection. We used a fan with no blades (Dyson, AM01 providing a wind of constant strength and direction (wind speed was 6.37 m/s to the subjects' faces with the visual stimuli visible through the fan. We used an optic flow of expansion or contraction created by positioning 16,000 dots at random inside a simulated cube (length 20 m, and moving the observer's viewpoint to simulate forward or backward self-motion of 16 m/s. we tested three conditions for fan operation, which were normal operation, normal operation with the fan reversed (ie, no wind, and no operation (no wind and no sound. Vection was facilitated by the wind (shorter latency, longer duration and larger magnitude values with the expansion stimuli. The fan noise did not facilitate vection. The wind neither facilitated nor inhibited vection with the contraction stimuli, perhaps because a headwind is not consistent with backward self-motion. We speculate that the consistency between multi modalities is a key factor in facilitating vection.

  16. Infanticide and moral consistency.

    Science.gov (United States)

    McMahan, Jeff

    2013-05-01

    The aim of this essay is to show that there are no easy options for those who are disturbed by the suggestion that infanticide may on occasion be morally permissible. The belief that infanticide is always wrong is doubtfully compatible with a range of widely shared moral beliefs that underlie various commonly accepted practices. Any set of beliefs about the morality of abortion, infanticide and the killing of animals that is internally consistent and even minimally credible will therefore unavoidably contain some beliefs that are counterintuitive.

  17. The Rucio Consistency Service

    CERN Document Server

    Serfon, Cedric; The ATLAS collaboration

    2016-01-01

    One of the biggest challenge with Large scale data management system is to ensure the consistency between the global file catalog and what is physically on all storage elements. To tackle this issue, the Rucio software which is used by the ATLAS Distributed Data Management system has been extended to automatically handle lost or unregistered files (aka Dark Data). This system automatically detects these inconsistencies and take actions like recovery or deletion of unneeded files in a central manner. In this talk, we will present this system, explain the internals and give some results.

  18. When is holography consistent?

    Energy Technology Data Exchange (ETDEWEB)

    McInnes, Brett, E-mail: matmcinn@nus.edu.sg [National University of Singapore (Singapore); Ong, Yen Chin, E-mail: yenchin.ong@nordita.org [Nordita, KTH Royal Institute of Technology and Stockholm University, Roslagstullsbacken 23, SE-106 91 Stockholm (Sweden)

    2015-09-15

    Holographic duality relates two radically different kinds of theory: one with gravity, one without. The very existence of such an equivalence imposes strong consistency conditions which are, in the nature of the case, hard to satisfy. Recently a particularly deep condition of this kind, relating the minimum of a probe brane action to a gravitational bulk action (in a Euclidean formulation), has been recognized; and the question arises as to the circumstances under which it, and its Lorentzian counterpart, is satisfied. We discuss the fact that there are physically interesting situations in which one or both versions might, in principle, not be satisfied. These arise in two distinct circumstances: first, when the bulk is not an Einstein manifold and, second, in the presence of angular momentum. Focusing on the application of holography to the quark–gluon plasma (of the various forms arising in the early Universe and in heavy-ion collisions), we find that these potential violations never actually occur. This suggests that the consistency condition is a “law of physics” expressing a particular aspect of holography.

  19. Model Checking as Static Analysis: Revisited

    DEFF Research Database (Denmark)

    Zhang, Fuyuan; Nielson, Flemming; Nielson, Hanne Riis

    2012-01-01

    We show that the model checking problem of the μ-calculus can be viewed as an instance of static analysis. We propose Succinct Fixed Point Logic (SFP) within our logical approach to static analysis as an extension of Alternation-free Least Fixed Logic (ALFP). We generalize the notion...

  20. Incremental Integrity Checking: Limitations and Possibilities

    DEFF Research Database (Denmark)

    Christiansen, Henning; Martinenghi, Davide

    2005-01-01

    to query containment, we show that no procedure exists that always returns the best incremental test (aka simplification of integrity constraints), and this according to any reasonable criterion measuring the checking effort. In spite of this theoretical limitation, we develop an effective procedure...

  1. Posterior Predictive Model Checking in Bayesian Networks

    Science.gov (United States)

    Crawford, Aaron

    2014-01-01

    This simulation study compared the utility of various discrepancy measures within a posterior predictive model checking (PPMC) framework for detecting different types of data-model misfit in multidimensional Bayesian network (BN) models. The investigated conditions were motivated by an applied research program utilizing an operational complex…

  2. Software Model Checking for Verifying Distributed Algorithms

    Science.gov (United States)

    2014-10-28

    Verification procedure is an intelligent exhaustive search of the state space of the design Model Checking 6 Verifying Synchronous Distributed App...Distributed App Sagar Chaki, June 11, 2014 © 2014 Carnegie Mellon University Tool Usage Project webpage (http://mcda.googlecode.com) • Tutorial

  3. Inkjet 3D printed check microvalve

    Science.gov (United States)

    Walczak, Rafał; Adamski, Krzysztof; Lizanets, Danylo

    2017-04-01

    3D printing enables fast and relatively easy fabrication of various microfluidic structures including microvalves. A check microvalve is the simplest valve enabling control of the fluid flow in microchannels. Proper operation of the check valve is ensured by a movable element that tightens the valve seat during backward flow and enables free flow for forward pressure. Thus, knowledge of the mechanical properties of the movable element is crucial for optimal design and operation of the valve. In this paper, we present for the first time the results of investigations on basic mechanical properties of the building material used in multijet 3D printing. Specified mechanical properties were used in the design and fabrication of two types of check microvalve—with deflecting or hinge-fixed microflap—with 200 µm and 300 µm thickness. Results of numerical simulation and experimental data of the microflap deflection were obtained and compared. The valves were successfully 3D printed and characterised. Opening/closing characteristics of the microvalve for forward and backward pressures were determined. Thus, proper operation of the check microvalve so developed was confirmed.

  4. 25 CFR 141.19 - Check cashing.

    Science.gov (United States)

    2010-04-01

    ... INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR FINANCIAL ACTIVITIES BUSINESS PRACTICES ON THE NAVAJO, HOPI AND ZUNI RESERVATIONS General Business Practices § 141.19 Check cashing. (a) A reservation business... order. A reservation business may not give scrip, credit or other substitute for U.S. currency...

  5. A Method for Model Checking Feature Interactions

    DEFF Research Database (Denmark)

    Pedersen, Thomas; Le Guilly, Thibaut; Ravn, Anders Peter

    2015-01-01

    This paper presents a method to check for feature interactions in a system assembled from independently developed concurrent processes as found in many reactive systems. The method combines and refines existing definitions and adds a set of activities. The activities describe how to populate the ...

  6. Model checking Quasi Birth Death processes

    NARCIS (Netherlands)

    Remke, A.K.I.

    2004-01-01

    Quasi-Birth Death processes (QBDs) are a special class of infinite state CTMCs that combines a large degree of modeling expressiveness with efficient solution methods. This work adapts the well-known stochastic logic CSL for use on QBDs as CSL and presents model checking algorithms for so-called lev

  7. Check list of European Hymenomycetous Heterobasidiae

    NARCIS (Netherlands)

    Donk, M.A.

    1966-01-01

    With this check list an attempt is made to account for the recorded European species of those Basidiomycetes that Patouillard called the “Hétérobasidies”, excluding, however, the Uredinales and Ustilaginales. Therefore, it covers the Septobasidiales, Tremellales (comprising the Auriculariineae and T

  8. Inadequate preanesthesia equipment checks in a simulator.

    Science.gov (United States)

    Armstrong-Brown, A; Devitt, J H; Kurrek, M; Cohen, M

    2000-10-01

    To assess how completely anesthesiologists check their machinery and equipment before use, and to determine what influence seniority, age and type of practice may have on checking practices. One hundred and twenty anesthesiologists were videotaped during a simulated anesthesia session. Each participant was scored by an assessor according to the number of items checked prior to the induction of anesthesia. A checklist of 20 items derived from well-publicized, international standards was used. Participants were grouped according to their type of practice. Overall, mean scores were low. The ideal score was 20. There were no differences among university anesthesiologists (mean score 10.1, standard deviation 4.3), community anesthesiologists (7.5 +/- 4.3) and anesthesia residents (9.0 +/- 3.8). Each of these groups scored, on average, better than medical students (3.6 +/- 3.7) (P 0.1) nor number of years in practice (r = -0.18, P > 0.1) correlated with score. Our study suggests that the equipment-checking practices of anesthesiologists require considerable improvement when compared with national and international standards. Possible reasons for this are discussed and some remedial suggestions are made.

  9. Efficient CSL Model Checking Using Stratification

    DEFF Research Database (Denmark)

    Zhang, Lijun; Jansen, David N.; Nielson, Flemming;

    2012-01-01

    For continuous-time Markov chains, the model-checking problem with respect to continuous-time stochastic logic (CSL) has been introduced and shown to be decidable by Aziz, Sanwal, Singhal and Brayton in 1996 [ 1, 2]. Their proof can be turned into an approximation algorithm with worse than expone...

  10. Automata-Based CSL Model Checking

    DEFF Research Database (Denmark)

    Zhang, Lijun; Jansen, David N.; Nielson, Flemming;

    2011-01-01

    For continuous-time Markov chains, the model-checking problem with respect to continuous-time stochastic logic (CSL) has been introduced and shown to be decidable by Aziz, Sanwal, Singhal and Brayton in 1996. The presented decision procedure, however, has exponential complexity. In this paper, we...

  11. Model checking timed automata : techniques and applications

    NARCIS (Netherlands)

    Hendriks, Martijn.

    2006-01-01

    Model checking is a technique to automatically analyse systems that have been modeled in a formal language. The timed automaton framework is such a formal language. It is suitable to model many realistic problems in which time plays a central role. Examples are distributed algorithms, protocols, emb

  12. Model Checking Software Systems: A Case Study.

    Science.gov (United States)

    1995-03-10

    gained. We suggest a radically different tack: model checking. The two formal objects compared are a finite state machine model of the software...simply terminates. 3.1.1. State Machine Model Let’s consider a simplified model with just one client, one server, and one file. The top graph

  13. Anchor Stress Checking of Security Injection Tank

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    The intention of the calculating is to check the anchor stresses of the security injection tank to know whether the stress is satisfied the code requirements on the basis of all the reaction forces gained in the static, seismic and thermal stress results.

  14. Statistical Model Checking for Stochastic Hybrid Systems

    DEFF Research Database (Denmark)

    David, Alexandre; Du, Dehui; Larsen, Kim Guldstrand

    2012-01-01

    This paper presents novel extensions and applications of the UPPAAL-SMC model checker. The extensions allow for statistical model checking of stochastic hybrid systems. We show how our race-based stochastic semantics extends to networks of hybrid systems, and indicate the integration technique ap...

  15. Type checking with open type functions

    DEFF Research Database (Denmark)

    Schrijvers, Tom; Jones, Simon Peyton; Chakravarty, Manual

    2008-01-01

    We report on an extension of Haskell with open type-level functions and equality constraints that unifies earlier work on GADTs, functional dependencies, and associated types. The contribution of the paper is that we identify and characterise the key technical challenge of entailment checking; an...

  16. Model checking the HAVi leader election protocol

    NARCIS (Netherlands)

    Romijn, J.M.T.

    1999-01-01

    The HAVi specification proposes an architecture for audio/video interoperability in home networks. Part of the HAVi specification is a distributed leader election protocol. We have modelled this leader election protocol in Promela and Lotos and have checked several properties with the tools Spin a

  17. 12 CFR 229.51 - General provisions governing substitute checks.

    Science.gov (United States)

    2010-01-01

    ... which a bank has provided the warranties described in § 229.52 is the legal equivalent of an original... indorsements applied by parties that previously handled the check in any form (including the original check, a substitute check, or another paper or electronic representation of such original check or substitute...

  18. 14 CFR 121.315 - Cockpit check procedure.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Cockpit check procedure. 121.315 Section... Cockpit check procedure. (a) Each certificate holder shall provide an approved cockpit check procedure for... for items to be checked. (c) The approved procedures must be readily usable in the cockpit of...

  19. Quality Checking for Multi-GNSS Data

    Science.gov (United States)

    Soehne, Wolfgang; Mervart, Leos; Ruelke, Axel; Stuerze, Andrea; Weber, Georg

    2015-04-01

    Quality checking of GNSS observations has a long tradition within the international GNSS community. For example, the RINEX files provided by the International GNSS Service (IGS) and IAG sub-commissions dealing with GNSS have been routinely checked with the tool teqc (Translation, Editing and Quality Checking (Estey & Meertens, 1999)). Data Centres like the regional GNSS data centre at the Federal Agency for Cartography and Geodesy (BKG) are relying on such tools. With upcoming new GNSS like BeiDou or Galileo and new regional systems like QZSS or IRNSS and growing number of Satellite-Based Augmentation Systems (SBAS), new signals and frequencies, and new formats like RTCM-MSM and RINEX 3 the need for flexible quality checking tools is arising. The IGS is keeping the pace with his initiative on multi-GNSS (MGEX) which is focusing on the use of the GNSS beyond the established GPS and GLONASS and with the establishment of a new working group on data quality control. Together with the Technical University of Prague (CTU) BKG has been developing the tool BKG Ntrip Client (BNC). Initially started as a tool for providing real-time navigational and observational data and derived products to the user BNC has been subsequently extended, e.g. by precise point positioning (PPP) and by post-processing capabilities. In the near past special features for editing and quality control have been established, e.g. for multipath analyses (MP) and signal-to-noise ratio (SNR). In this presentation, we will demonstrate the various features of BNC for quality control. Examples especially for multi-GNSS data will be shown. Potential usage for the open GNSS community will be outlined. Some proposals for a unified ASCII output to facilitate usage of different software tools on quality checking will finalize the presentation.

  20. Establishment of methodology for determination of {sup 93}Zr in radioactive wastes by Liquid Scintillation Counting (LSC) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS); Estabelecimento de metodologia para determinacao de {sup 93}Zr em rejeitos radioativos por Espectrometria de Cintilacao Liquida (LSC) e Espectrometria de Massa com Plasma Indutivamente Acoplado (ICP-MS)

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Thiago Cesar de

    2014-06-01

    The zirconium-93 is a long-lived pure β-particle-emitting radionuclide produced from {sup 235}U fission and from neutron activation of the stable isotope {sup 92}Zr and thus occurring as one of the radionuclides found in nuclear reactors. Due to its long half life, {sup 93}Zr is one of the radionuclides of interest for the performance of assessment studies of waste storage or disposal. Measurement of {sup 93}Zr is difficult owing to its trace level concentration and its low activity in nuclear wastes and further because its certified standards are not frequently available. The aim of this work was to develop a selective radiochemical separation methodology for the determination of {sup 93}Zr in nuclear waste and analyze it by Liquid Scintillation Counting (LSC) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS). To set up the radiochemical separation procedure for zirconium, a tracer solution of {sup 95}Zr and its 724 keV γ-ray measurements by γ- spectrometry were used in order to follow the behavior of zirconium during the radiochemical separation. For the LSC technique a {sup 55}Fe solution, which is one of the major interfering measures zirconium, was used to verify the decontamination factor during the separation process. The efficiency detection for {sup 63}Ni was used to determination of {sup 93}Zr activity in the matrices analyzed. The limit of detection of the 0.05 Bq 1{sup −1} was obtained for {sup 63}Ni standard solutions by using a sample:cocktail ratio of 3:17 mL for Optiphase Hisafe 3 cocktail. For the ICP-MS technique a zirconium stable solution was used to verify the zirconium behavior and recovery during radiochemical separation and a solution of Ba, Co, Eu, Fe, Mn, Nb, Sr and Y was used to verify the decontamination factor during the separation process. A standard solution {sup 93}Nb as isotope for determining the {sup 93}Zr by ICP-MS was used for calibration and analysis. The detection limit of 0.039 ppb was obtained for the standard

  1. Consistent quantum measurements

    Science.gov (United States)

    Griffiths, Robert B.

    2015-11-01

    In response to recent criticisms by Okon and Sudarsky, various aspects of the consistent histories (CH) resolution of the quantum measurement problem(s) are discussed using a simple Stern-Gerlach device, and compared with the alternative approaches to the measurement problem provided by spontaneous localization (GRW), Bohmian mechanics, many worlds, and standard (textbook) quantum mechanics. Among these CH is unique in solving the second measurement problem: inferring from the measurement outcome a property of the measured system at a time before the measurement took place, as is done routinely by experimental physicists. The main respect in which CH differs from other quantum interpretations is in allowing multiple stochastic descriptions of a given measurement situation, from which one (or more) can be selected on the basis of its utility. This requires abandoning a principle (termed unicity), central to classical physics, that at any instant of time there is only a single correct description of the world.

  2. The Dynamic Checking of Complex Real Time System

    Institute of Scientific and Technical Information of China (English)

    YU Chao; HUANG Benwen; WU Guoqing

    2006-01-01

    The paper presents an dynamic execution model of complex real-time software based on requirement description model RTRSM, and then propose a checking method based on configuration covering and its corresponding algorithm. This checking method can check the execution situations between parallel elements in a dynamic execution step of real-time software systems. It also can check all the states and transitions which assure the completeness of checking. In the end, related theorem is proofed.

  3. When Is Holography Consistent?

    CERN Document Server

    McInnes, Brett

    2015-01-01

    Holographic duality relates two radically different kinds of theory: one with gravity, one without. The very existence of such an equivalence imposes strong consistency conditions which are, in the nature of the case, hard to satisfy. Recently a particularly deep condition of this kind, relating the minimum of a probe brane action to a gravitational bulk action (in a Euclidean formulation), has been recognised; and the question arises as to the circumstances under which it, and its Lorentzian counterpart, are satisfied. We discuss the fact that there are physically interesting situations in which one or both versions might, in principle, \\emph{not} be satisfied. These arise in two distinct circumstances: first, when the bulk is not an Einstein manifold, and, second, in the presence of angular momentum. Focusing on the application of holography to the quark-gluon plasma (of the various forms arising in the early Universe and in heavy-ion collisions), we find that these potential violations never actually occur...

  4. 32 CFR Attachment A to Subpart B... - Standard A-National Agency Check With Local Agency Checks and Credit Check (NACLC)

    Science.gov (United States)

    2010-07-01

    ... Access Programs by sect. 4.4 of Executive Order 12958) (60 FR 19825, 3 CFR 1995 Comp., p. 333); (2) “L... Agency Checks and Credit Check (NACLC) A Attachment A to Subpart B of Part 147 National Defense..., Subpt. B, Att. A Attachment A to Subpart B of Part 147—Standard A—National Agency Check With...

  5. Check-Up Checklist: Things to Do Before Your Next Check-Up

    Science.gov (United States)

    ... Be Safe on Halloween Be Smoke-Free Check Alarm Batteries Know Your Family History Keep Foods Safe ... or skin changes? Are you having pain, dizziness, fatigue, problems with urine or stool, or menstrual cycle ...

  6. On ZRP wind input term consistency in Hasselmann equation

    CERN Document Server

    Zakharov, Vladimir; Pushkarev, Andrei

    2016-01-01

    The new ZRP wind input source term (Zakharov et al. 2012) is checked for its consistency via numerical simulation of Hasselmann equation. The results are compared to field experimental data, collected at different sites around the world, and theoretical predictions of self-similarity analysis. Good agreement is obtained for limited fetch and time domain statements

  7. Perceived social presence reduces fact-checking.

    Science.gov (United States)

    Jun, Youjung; Meng, Rachel; Johar, Gita Venkataramani

    2017-06-06

    Today's media landscape affords people access to richer information than ever before, with many individuals opting to consume content through social channels rather than traditional news sources. Although people frequent social platforms for a variety of reasons, we understand little about the consequences of encountering new information in these contexts, particularly with respect to how content is scrutinized. This research tests how perceiving the presence of others (as on social media platforms) affects the way that individuals evaluate information-in particular, the extent to which they verify ambiguous claims. Eight experiments using incentivized real effort tasks found that people are less likely to fact-check statements when they feel that they are evaluating them in the presence of others compared with when they are evaluating them alone. Inducing vigilance immediately before evaluation increased fact-checking under social settings.

  8. Check-Operators and Quantum Spectral Curves

    Science.gov (United States)

    Mironov, Andrei; Morozov, Alexei

    2017-06-01

    We review the basic properties of effective actions of families of theories (i.e., the actions depending on additional non-perturbative moduli along with perturbative couplings), and their description in terms of operators (called check-operators), which act on the moduli space. It is this approach that led to constructing the (quantum) spectral curves and what is now nicknamed the EO/AMM topological recursion. We explain how the non-commutative algebra of check-operators is related to the modular kernels and how symplectic (special) geometry emerges from it in the classical (Seiberg-Witten) limit, where the quantum integrable structures turn into the well studied classical integrability. As time goes, these results turn applicable to more and more theories of physical importance, supporting the old idea that many universality classes of low-energy effective theories contain matrix model representatives.

  9. Model Checking with Probabilistic Tabled Logic Programming

    CERN Document Server

    Gorlin, Andrey; Smolka, Scott A

    2012-01-01

    We present a formulation of the problem of probabilistic model checking as one of query evaluation over probabilistic logic programs. To the best of our knowledge, our formulation is the first of its kind, and it covers a rich class of probabilistic models and probabilistic temporal logics. The inference algorithms of existing probabilistic logic-programming systems are well defined only for queries with a finite number of explanations. This restriction prohibits the encoding of probabilistic model checkers, where explanations correspond to executions of the system being model checked. To overcome this restriction, we propose a more general inference algorithm that uses finite generative structures (similar to automata) to represent families of explanations. The inference algorithm computes the probability of a possibly infinite set of explanations directly from the finite generative structure. We have implemented our inference algorithm in XSB Prolog, and use this implementation to encode probabilistic model...

  10. Clamp force and alignment checking device

    Energy Technology Data Exchange (ETDEWEB)

    Spicer, John Patrick; Cai, Wayne W.; Chakraborty, Debejyo; Mink, Keith

    2017-04-11

    A check fixture measures a total clamp force applied by a welder device. The welder device includes a welding horn having a plurality of weld pads and welding anvil having a plurality of weld pads. The check fixture includes a base member operatively supporting a plurality of force sensors. The base member and the force sensors are received between the weld pads of the welding horn and the anvil pads of the welding anvil. Each force sensor is configured to measure an individual clamp force applied thereto by corresponding weld and anvil pads when the base member is received between the welding horn and the welding anvil and the welder device is in the clamped position. The individual clamp forces are used to determine whether the weld and/or anvil pads are worn or misaligned.

  11. Model Checking the Remote Agent Planner

    Science.gov (United States)

    Khatib, Lina; Muscettola, Nicola; Havelund, Klaus; Norvig, Peter (Technical Monitor)

    2001-01-01

    This work tackles the problem of using Model Checking for the purpose of verifying the HSTS (Scheduling Testbed System) planning system. HSTS is the planner and scheduler of the remote agent autonomous control system deployed in Deep Space One (DS1). Model Checking allows for the verification of domain models as well as planning entries. We have chosen the real-time model checker UPPAAL for this work. We start by motivating our work in the introduction. Then we give a brief description of HSTS and UPPAAL. After that, we give a sketch for the mapping of HSTS models into UPPAAL and we present samples of plan model properties one may want to verify.

  12. Speed checks on the CERN site

    CERN Multimedia

    2007-01-01

    In view of the significant number of speeding incidents that have been reported, CERN will shortly start to carry out speed checks on the site. The radar used for this purpose will show drivers the speed measured. The disciplinary measures taken against those exceeding the authorised limit (generally 50 k.p.h.) will include a ban from driving on the site for a minimum of one month. Maximilian Metzger
Secretary-General

  13. Water system microbial check valve development

    Science.gov (United States)

    Colombo, G. V.; Greenley, D. R.; Putnam, D. F.

    1978-01-01

    A residual iodine microbial check valve (RIMCV) assembly was developed and tested. The assembly is designed to be used in the space shuttle potable water system. The RIMCV is based on an anion exchange resin that is supersaturated with an iodine solution. This system causes a residual to be present in the effluent water which provides continuing bactericidal action. A flight prototype design was finalized and five units were manufactured and delivered.

  14. Statistical Model Checking for Stochastic Hybrid Systems

    DEFF Research Database (Denmark)

    David, Alexandre; Du, Dehui; Larsen, Kim Guldstrand

    2012-01-01

    This paper presents novel extensions and applications of the UPPAAL-SMC model checker. The extensions allow for statistical model checking of stochastic hybrid systems. We show how our race-based stochastic semantics extends to networks of hybrid systems, and indicate the integration technique...... applied for implementing this semantics in the UPPAAL-SMC simulation engine. We report on two applications of the resulting tool-set coming from systems biology and energy aware buildings....

  15. Model checking the HAVi leader election protocol

    OpenAIRE

    Romijn, J.M.T.

    1999-01-01

    The HAVi specification proposes an architecture for audio/video interoperability in home networks. Part of the HAVi specification is a distributed leader election protocol. We have modelled this leader election protocol in Promela and Lotos and have checked several properties with the tools Spin and Xtl (from the Caesar/Aldebaran package). It turns out that the protocol does not meet some safety properties and that there are situations in which the protocol may never converge to designate a l...

  16. Living MedsCheck: Learning how to deliver MedsCheck in community practice in Ontario.

    Science.gov (United States)

    Grindrod, Kelly; Sanghera, Niki; Rahmaan, Israa; Roy, Meghna; Tritt, Michael

    2013-01-01

    To share the experiences of graduating students as they learn to deliver a new medication review service in community pharmacies in Ontario, Canada. Four graduating pharmacy students volunteered in different community pharmacies to learn how to navigate a new provincial program called MedsCheck, which pays pharmacists to do medication reviews. Each student selected his or her own practice site, including 2 independent community pharmacies, a grocery store chain pharmacy and a hospital outpatient pharmacy. To help the students learn to deliver the new MedsCheck services, a faculty mentor met with them on a weekly basis. To reflect on doing MedsChecks in the "real world" and to elicit feedback from the online community, each student blogged about his or her experiences. All 4 students felt that peer mentoring improved their ability to deliver MedsCheck services. They also identified a number of barriers to delivering the MedsChecks and helped each other try to overcome the barriers. MedsCheck is a new service in Ontario and is not easily implemented in the current pharmacy model of practice. Peer mentoring is a helpful way to share successes and overcome barriers to delivery. Can Pharm J 2013;146:33-38.

  17. Slit-check dams for the control of debris flow

    Science.gov (United States)

    Armanini, Aronne; Larcher, Michele

    2017-04-01

    Debris flows are paroxysmal events that mobilize, alongside water, huge quantities of sediment in a very short time, then with both solid and liquid huge discharges, possibly exceeding the capacity of the current torrent restoration works. In this respect, the climate change forcing cannot be ignored. In the majority of urbanized areas, that are generally the most vulnerable, there is often not enough space to create channelling works able to let the volumes pass through without overflowing. The simplest, less expensive and most sustainable solution consists in reducing the peak solid discharge by creating storage areas upstream of the settlements, typically upstream of the alluvial fans, allowing for reduced works of canalization, that are compatible with the constraints imposed by the urbanization. The general idea consists in storing a part of the flowing solids during the peak of the hydrograph and releasing it in a successive phase or during minor floods. For this purpose, and in order to optimize the solid peak discharge reduction, it is necessary that properly designed open-check dams, capable of inducing a significative sedimentation of the solid discharge only when this exceeds a design-threshold value, control the deposition basins. A correct design of the check dam is crucial in order to induce the sedimentation in the right amount and at the right moment: a too early sedimentation might fill the volume before the peak, like in the case of close-check dams, while a too weak sedimentation might not use the whole available volume. In both cases, the channelling works might not be sufficient to let all the flow pass through, compromising the safety of the settlement. To avoid this inconvenience, we propose the use of slit-check dams, whose efficiency has already been proved for bed load. Check dams are often designed only on the base of the designer's experience. Besides, even today it is often believed that the filtering effect of open check dams is

  18. Performance of compulsive behavior in rats is not a unitary phenomenon - validation of separate functional components in compulsive checking behavior.

    Science.gov (United States)

    Tucci, Mark C; Dvorkin-Gheva, Anna; Johnson, Eric; Cheon, Paul; Taji, Leena; Agarwal, Arnav; Foster, Jane; Szechtman, Henry

    2014-09-01

    A previous analysis of the quinpirole sensitisation rat model of obsessive-compulsive disorder revealed that the behavioral phenotype of compulsive checking consists of three constitutive components - vigor of checking performance, focus on the task of checking, and satiety following a bout of checking. As confirmation of this analysis, the aim of the present study was to reconstitute, without quinpirole treatment, each of the putative components, with the expectation that these would self-assemble into compulsive checking. To reconstitute vigor and satiety, the employed treatment was a bilateral lesion of the nucleus accumbens core (NAc), as this treatment was shown previously to exaggerate these components. To reconstitute focus, the employed treatment was a low dose of the serotonin-1A receptor agonist 8-hydroxy-2-(di-n-propylamino) tetralin hydrochloride (DPAT) (0.0625 mg/kg), as high doses of this drug induce compulsive behavior and exacerbate focus. Results showed that injection of DPAT to NAc lesion rats did yield compulsive checking. Neither the drug alone nor the NAc lesion by itself produced compulsive checking. The demonstrated synthesis of compulsive checking by the combined treatment of low-dose DPAT and NAc lesion strengthened the previous fractionation of the model obsessive-compulsive disorder phenotype into three constitutive components, and suggested a role for serotonin-1A receptors outside the NAc in enhanced focus on the task of checking.

  19. Model checking coalitional games in shortage resource scenarios

    Directory of Open Access Journals (Sweden)

    Dario Della Monica

    2013-07-01

    Full Text Available Verification of multi-agents systems (MAS has been recently studied taking into account the need of expressing resource bounds. Several logics for specifying properties of MAS have been presented in quite a variety of scenarios with bounded resources. In this paper, we study a different formalism, called Priced Resource-Bounded Alternating-time Temporal Logic (PRBATL, whose main novelty consists in moving the notion of resources from a syntactic level (part of the formula to a semantic one (part of the model. This allows us to track the evolution of the resource availability along the computations and provides us with a formalisms capable to model a number of real-world scenarios. Two relevant aspects are the notion of global availability of the resources on the market, that are shared by the agents, and the notion of price of resources, depending on their availability. In a previous work of ours, an initial step towards this new formalism was introduced, along with an EXPTIME algorithm for the model checking problem. In this paper we better analyze the features of the proposed formalism, also in comparison with previous approaches. The main technical contribution is the proof of the EXPTIME-hardness of the the model checking problem for PRBATL, based on a reduction from the acceptance problem for Linearly-Bounded Alternating Turing Machines. In particular, since the problem has multiple parameters, we show two fixed-parameter reductions.

  20. A standardized vascular disease health check in europe: a cost-effectiveness analysis.

    Directory of Open Access Journals (Sweden)

    C Andy Schuetz

    Full Text Available BACKGROUND: No clinical trials have assessed the effects or cost-effectiveness of health check strategies to detect and manage vascular disease. We used a mathematical model to estimate the cost-effectiveness of several health check strategies in six European countries. METHODS: We used country-specific data from Denmark, France, Germany, Italy, Poland, and the United Kingdom to generate simulated populations of individuals aged 40-75 eligible for health checks in those countries (e.g. individuals without a previous diagnosis of diabetes, myocardial infarction, stroke, or serious chronic kidney disease. For each country, we used the Archimedes model to compare seven health check strategies consisting of assessments for diabetes, hypertension, lipids, and smoking. For patients diagnosed with vascular disease, treatment was simulated in a standard manner. We calculated the effects of each strategy on the incidence of type 2 diabetes, major adverse cardiovascular events (MACE, and microvascular complications in addition to quality of life, costs, and cost per quality-adjusted life-year (QALY. RESULTS: Compared with current care, health checks reduced the incidence of MACE (6-17 events prevented per 1000 people screened and diabetes related microvasular complications (5-11 events prevented per 1000 people screened, and increased QALYs (31-59 discounted QALYs over 30 years, in all countries. The cost per QALY of offering a health check to all individuals in the study cohort ranged from €14903 (France to cost saving (Poland. Pre-screening the population and offering health checks only to higher risk individuals lowered the cost per QALY. Pre-screening on the basis of obesity had a cost per QALY of €10200 (France or less, and pre-screening with a non-invasive risk score was similar. CONCLUSIONS: A vascular disease health check would likely be cost effective at 30 years in Denmark, France, Germany, Italy, Poland, and the United Kingdom.

  1. Statistical Model Checking for Biological Systems

    DEFF Research Database (Denmark)

    David, Alexandre; Larsen, Kim Guldstrand; Legay, Axel

    2014-01-01

    Statistical Model Checking (SMC) is a highly scalable simulation-based verification approach for testing and estimating the probability that a stochastic system satisfies a given linear temporal property. The technique has been applied to (discrete and continuous time) Markov chains, stochastic...... proved very useful for identifying interesting properties of biological systems. Our aim is to offer the best of the two worlds: optimal domain specific interfaces and formalisms suited to biology combined with powerful SMC analysis techniques for stochastic and hybrid systems. This goal is obtained...

  2. Outage maintenance checks on large generator windings

    Energy Technology Data Exchange (ETDEWEB)

    Nindra, B.; Jeney, S.I.; Slobodinsky, Y. [National Electric Coil, Columbus, OH (United States)

    1995-12-31

    In the present days of austerity, more constraints and pressures are being brought on the maintenance engineers to certify the generators for their reliability and life extension. The outages are shorter and intervals between the outages are becoming longer. The annual outages were very common when utilities had no regulatory constraints and also had standby capacities. Furthermore, due to lean and mean budgets, outage maintenance programs are being pursued more aggressively, so that longer interval outages can be achieved to ensure peak generator performance. This paper will discuss various visual checks, electrical tests and recommended fixes to achieve the above mentioned objectives, in case any deficiencies are found.

  3. Political and judicial checks on corruption

    DEFF Research Database (Denmark)

    Alt, James E.; Lassen, David Dreyer

    2008-01-01

    This paper investigates the effects of checks and balances on corruption. Within a presidential system, effective separation of powers is achieved under a divided government, with the executive and legislative branches being controlled by different political parties. When government is unified......, no effective separation exists even within a presidential system, but, we argue, can be partially restored by having an accountable judiciary. Our empirical findings show that a divided government and elected, rather than appointed, state supreme court judges are associated with lower corruption and...

  4. Non intrusive check valve diagnostics at Bruce A

    Energy Technology Data Exchange (ETDEWEB)

    Marsch, S.P. [Ontario Hydro, Bruce Nuclear Generating Station A, Tiverton, ON (Canada)

    1997-07-01

    Bruce A purchased non intrusive check valve diagnostic equipment in 1995 to ensure operability and availability of critical check valves in the Station. Diagnostics can be used to locate and monitor check valve degradation modes. Bruce A initiated a pilot program targeting check valves with flow through them and ones that completed open or close cycles. Approaches to determine how to confirm operability of passive check valves using non intrusive techniques were explored. A sample population of seventy-three check valves was selected to run the pilot program on prior to complete implementation. The pilot program produced some significant results and some inconclusive results. The program revealed a major finding that check valve performance modeling is required to ensure continuous operability of check valves. (author)

  5. Non intrusive check valve diagnostics at Bruce A

    Energy Technology Data Exchange (ETDEWEB)

    Marsch, S.P. [Ontario Hydro, Bruce Nuclear Generating Station A, Tiverton, ON (Canada)

    1997-07-01

    Bruce A purchased non intrusive check valve diagnostic equipment in 1995 to ensure operability and availability of critical check valves in the Station. Diagnostics can be used to locate and monitor check valve degradation modes. Bruce A initiated a pilot program targeting check valves with flow through them and ones that completed open or close cycles. Approaches to determine how to confirm operability of passive check valves using non intrusive techniques were explored. A sample population of seventy-three check valves was selected to run the pilot program on prior to complete implementation. The pilot program produced some significant results and some inconclusive results. The program revealed a major finding that check valve performance modeling is required to ensure continuous operability of check valves. (author)

  6. A Little Training Helps Couples Ease into Skin Cancer Checks

    Science.gov (United States)

    ... html A Little Training Helps Couples Ease Into Skin Cancer Checks Study finds the potentially life-saving routine ... 14, 2016 WEDNESDAY, Dec. 14, 2016 (HealthDay News) -- Skin cancer checks between couples don't have to be ...

  7. Effect of check size and stimulation rate on blue-yellow multifocal visual evoked potentials.

    Science.gov (United States)

    Martins, Alessandra; Klistorner, Alexander; Graham, Stuart; Billson, Frank

    2004-06-01

    To determine the effect of different stimulus frame rates and check sizes on blue-yellow multifocal visual evoked potentials (mVEP). Subjects were examined at the Save Sight Institute at the University Sydney. Experiment 1 involved five adult subjects who underwent binocular stimulation by the Accumap multifocal objective perimeter. The eyes were stimulated with a cortically scaled dartboard pattern consisting of isoluminant blue and yellow checks. These were arranged in three concentric rings extending to an eccentricity of 26 degrees in the visual field. The stimulus pattern was driven by binary sequences resulting in pseudorandom binary exchange of two opposite checkerboard patterns at each of the 32 sites in the visual field. The mVEP were recorded at two different rates of display of the pattern stimulus. In experiment 2, mVEP were tested on 10 normal subjects. Each of the 36 stimulation sites contained a checkerboard pattern of 20, 30, 42 or 56 checks/site, the stimulation pattern was displayed at the optimum rate found in experiment 1. The size of the checks was inversely proportional to the number of checks per site. In experiment 1, the slow frame rate significantly increased the average amplitude throughout the field tested by 50 +/- 10.1% (P = 0.001). Latency was significantly shortened by 6.3% (P < 0.01). In experiment 2, the average amplitude peaked at 30 checks per segment; however, this was only calculated to be significantly different from the smallest check size (F(crit range 4,27) = 0.09 P < 0.05, anova, Tukey's T method). A similar difference was found in ring 1 (F(crit range 4,27) = 0.09, P < 0.05, anova, Tukey's T method). In ring 2, however, there was also a significant difference between 56 checks and 20, 30 and 42 (F(crit range 4,27) = 0.09, anova, P < 0.05). Altering the check sizes did not significantly affect the amplitudes in ring 3. The latencies were not significantly modified by altering check size at any eccentricity. These findings

  8. Found Poems, Member Checking and Crises of Representation

    Science.gov (United States)

    Reilly, Rosemary C.

    2013-01-01

    In order to establish veracity, qualitative researchers frequently rely on member checks to insure credibility by giving participants opportunities to correct errors, challenge interpretations and assess results; however, member checks are not without drawbacks. This paper describes an innovative approach to conducting member checks. Six members…

  9. Spell Checking: Making Writing Meaningful in the Inclusive Classroom.

    Science.gov (United States)

    Ashton, Tamarah M.

    1999-01-01

    This article describes the CHECK procedure for teaching students with learning disabilities skills in the actual operation of a computer spell-check. Students are urged to check the beginning sound, hunt for correct consonants, examine the vowels, make changes, and keep repeating the process. (CR)

  10. 30 CFR 77.309 - Visual check of system equipment.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Visual check of system equipment. 77.309... COAL MINES Thermal Dryers § 77.309 Visual check of system equipment. Frequent visual checks shall be made by the operator of the thermal dryer system control station, or by some other competent person,...

  11. Preventive Maintenance Checks and Services (PMCS). Do We Check Too Much and Maintain Too Little

    Science.gov (United States)

    1990-03-26

    They were similar to the trucks and tractors that many soldiers had back home on the farms . Since the U.S. was predominantly a rural society then, the...of an item requiring before-operation checks would render the :t m - iot mission-capable. Currently there are over 200 PMCS checks on the new Abrams...ensure that we are maintaining our vehicles in a go-to-war condition and that we are doing it the smart way. Our system requires significant changes

  12. Model-Based Trace-Checking

    CERN Document Server

    Howard, Y; Gravell, A; Ferreira, C; Augusto, J C

    2011-01-01

    Trace analysis can be a useful way to discover problems in a program under test. Rather than writing a special purpose trace analysis tool, this paper proposes that traces can usefully be analysed by checking them against a formal model using a standard model-checker or else an animator for executable specifications. These techniques are illustrated using a Travel Agent case study implemented in J2EE. We added trace beans to this code that write trace information to a database. The traces are then extracted and converted into a form suitable for analysis by Spin, a popular model-checker, and Pro-B, a model-checker and animator for the B notation. This illustrates the technique, and also the fact that such a system can have a variety of models, in different notations, that capture different features. These experiments have demonstrated that model-based trace-checking is feasible. Future work is focussed on scaling up the approach to larger systems by increasing the level of automation.

  13. Applying GPS to check horizontal control quality

    Directory of Open Access Journals (Sweden)

    Jakub Vincent

    2004-03-01

    Full Text Available GPS technologies can also be used for check quality in available horizontal point set with coordinates CJ of the frame S-JTSK. When survey and setting-out tasks should be performed in certain area, one can found in it allways some points of the fundamental and detail state controls. To use these points for some actual aims, it is necessary to investigate their compatibility (among the point mark positions and the point coordinate of control points. This can be done using GPS surveying that may be at the same time employed to determine the new point in the relevant area.Principle of quality investigatingf an existing control is founded on determination of point coordinates CJt from GPS measurements. Then, based on discrepancies among the "official" netpoint coordinates CJ and coordinates CJt "given by GPS", it can be estimated the degree and the real compatibility dislocations in the network structure of the existing points.Realisation procedure for the introduced investigation is demonstrated on GPS checking (by SOKKIA STRATUS receivers horizontal control for reconstruction of a railway bridge on river Bodrog in East Slovakia.It can be shown from the results in Table 3, that points P3 and P7 are useless due to their incompatibility (inconsistency in the inspected point set. For other 7 points (Table 7 the average measure of incompatibility reads 9.8 mm that make possible applying these points for precise setting-out

  14. Model Checking of Boolean Process Models

    CERN Document Server

    Schneider, Christoph

    2011-01-01

    In the field of Business Process Management formal models for the control flow of business processes have been designed since more than 15 years. Which methods are best suited to verify the bulk of these models? The first step is to select a formal language which fixes the semantics of the models. We adopt the language of Boolean systems as reference language for Boolean process models. Boolean systems form a simple subclass of coloured Petri nets. Their characteristics are low tokens to model explicitly states with a subsequent skipping of activations and arbitrary logical rules of type AND, XOR, OR etc. to model the split and join of the control flow. We apply model checking as a verification method for the safeness and liveness of Boolean systems. Model checking of Boolean systems uses the elementary theory of propositional logic, no modal operators are needed. Our verification builds on a finite complete prefix of a certain T-system attached to the Boolean system. It splits the processes of the Boolean sy...

  15. Monitoring of Erosion Preventive Structures Based on Eco-Engineering Approaches: The Case of the Mixed Check Dams of Masonry and Forest Residues

    Directory of Open Access Journals (Sweden)

    Guillermo Tardio Cerrillo

    2016-05-01

    Full Text Available The mixed check dams were conceived in late 2007, during actions to control the onset of erosion processes in Teide National Park subsequent to a forest fire. A simplified scheme of these mixed check dams consists of a structure of horizontal and vertical wooden elements creating a core that is filled with fine branches and forest residues. Besides this, rocks are placed on both sides of the check dam. The mixed check dam technique follows an eco-engineering design approach. These check dams are temporary structures because their cores will decompose in a few years (from 5-10 years depending on the size of the forest residues used. After our last visit to Tenerife (August 2012, it could be checked that the mixed check dams are providing the predicted results. The sedimentation processes achieved are satisfactory. Based on the collected data during the monitoring stage, the performance of this technique can be already characterised successful.

  16. 75 FR 24796 - FBI Records Management Division National Name Check Program Section User Fees

    Science.gov (United States)

    2010-05-06

    ... collect fees to process name-based CHRI checks, was set out in Public Law (Pub. L.) 101-515. This... Support (ACS) system to access 105 million records from previous automated systems. The ACS consists of... authority citation for Part 20 continues to read as follows: Authority: 28 U.S.C. 534; Pub. L. 92-544, 86...

  17. SimCheck: An Expressive Type System for Simulink

    Science.gov (United States)

    Roy, Pritam; Shankar, Natarajan

    2010-01-01

    MATLAB Simulink is a member of a class of visual languages that are used for modeling and simulating physical and cyber-physical systems. A Simulink model consists of blocks with input and output ports connected using links that carry signals. We extend the type system of Simulink with annotations and dimensions/units associated with ports and links. These types can capture invariants on signals as well as relations between signals. We define a type-checker that checks the wellformedness of Simulink blocks with respect to these type annotations. The type checker generates proof obligations that are solved by SRI's Yices solver for satisfiability modulo theories (SMT). This translation can be used to detect type errors, demonstrate counterexamples, generate test cases, or prove the absence of type errors. Our work is an initial step toward the symbolic analysis of MATLAB Simulink models.

  18. LHCb: Analysing DIRAC's Behavior using Model Checking with Process Algebra

    CERN Multimedia

    Remenska, Daniela

    2012-01-01

    DIRAC is the Grid solution designed to support LHCb production activities as well as user data analysis. Based on a service-oriented architecture, DIRAC consists of many cooperating distributed services and agents delivering the workload to the Grid resources. Services accept requests from agents and running jobs, while agents run as light-weight components, fulfilling specific goals. Services maintain database back-ends to store dynamic state information of entities such as jobs, queues, staging requests, etc. Agents use polling to check for changes in the service states, and react to these accordingly. A characteristic of DIRAC's architecture is the relatively low complexity in the logic of each agent; the main source of complexity lies in their cooperation. These agents run concurrently, and communicate using the services' databases as a shared memory for synchronizing the state transitions. Although much effort is invested in making DIRAC reliable, entities occasionally get into inconsistent states, leadi...

  19. Experiments in Model-Checking Optimistic Replication Algorithms

    CERN Document Server

    Boucheneb, Hanifa

    2008-01-01

    This paper describes a series of model-checking experiments to verify optimistic replication algorithms based on Operational Transformation (OT) approach used for supporting collaborative edition. We formally define, using tool UPPAAL, the behavior and the main consistency requirement (i.e. convergence property) of the collaborative editing systems, as well as the abstract behavior of the environment where these systems are supposed to operate. Due to data replication and the unpredictable nature of user interactions, such systems have infinitely many states. So, we show how to exploit some features of the UPPAAL specification language to attenuate the severe state explosion problem. Two models are proposed. The first one, called concrete model, is very close to the system implementation but runs up against a severe explosion of states. The second model, called symbolic model, aims to overcome the limitation of the concrete model by delaying the effective selection and execution of editing operations until th...

  20. Ground-based complex for checking the optical system

    Science.gov (United States)

    Grebenyuk, V.; Boreiko, V.; Dmitrotsa, A.; Gorbunov, N.; Khrenov, B.; Klimov, P.; Lavrova, M.; Popescu, E. M.; Sabirov, B.; Tkachenko, A.; Tkachev, L.; Volvach, A.; Yashin, I.

    2016-09-01

    The purpose TUS space experiment is to study cosmic rays of ultrahigh energies produced by extensive air showers from space. The concentrator is located on satellite, made in the form of the Fresnel mirror towards the earth's atmosphere, the focus of which is a photodetector. The angle of view of the mirror is ±4.5° that for a given height of the orbit corresponds to the area 80 × 80 km2 on ground. The ground complex consisting of a number of stations, to check the optical system of the experiment is created, (their location and the amount will be determined after the launch of the satellite based on its actual orbit).

  1. Improved Integrity Constraints Checking in Distributed Databases by Exploiting Local Checking

    Institute of Scientific and Technical Information of China (English)

    Ali A.Alwan; Hamidah Ibrahim; Nur Izura Udzir

    2009-01-01

    Most of the previous studies concerning checking the integrity constraints in distributed database derive simplified forms of the initial integrity constraints with the sufficiency property, since the sufficient test is known to be cheaper than the complete test and its initial integrity constraint as it involves less data to be transferred across the network and can always be evaluated at the target site (single site). Their studies are limited as they depend strictly on the assumption that an update operation will be executed at a site where the relation specified in the update operation is located, which is not always true. Hence, the sufficient test, which is proven to be local test by previous study, is no longer appropriate. This paper proposes an approach to checking integrity constraints in a distributed database by utilizing as much as possible the local information stored at the target site. The proposed approach derives support tests as an alternative to the existing complete and sufficient tests proposed by previous researchers with the intention to increase the number of local checking regardless the location of the submitted update operation. Several analyses have been performed to evaluate the proposed approach, and the results show that support tests can benefit the distributed database, where local constraint checking can be achieved.

  2. Checking in: An Analysis of the (Lack of) Body Checking in Women's Ice Hockey

    Science.gov (United States)

    Weaving, Charlene; Roberts, Samuel

    2012-01-01

    Despite the growing popularity of women's ice hockey in North America, players continue to face limitations because of the prohibition of body checking. In this paper, we argue from a liberal feminist philosophical perspective that this prohibition reinforces existing traditional stereotypes of female athletes. Because the women's game does not…

  3. Can I Just Check...? Effects of Edit Check Questions on Measurement Error and Survey Estimates

    Directory of Open Access Journals (Sweden)

    Lugtig Peter

    2014-03-01

    Full Text Available Household income is difficult to measure, since it requires the collection of information about all potential income sources for each member of a household.Weassess the effects of two types of edit check questions on measurement error and survey estimates: within-wave edit checks use responses to questions earlier in the same interview to query apparent inconsistencies in responses; dependent interviewing uses responses from prior interviews to query apparent inconsistencies over time.Weuse data from three waves of the British Household Panel Survey (BHPS to assess the effects of edit checks on estimates, and data from an experimental study carried out in the context of the BHPS, where survey responses were linked to individual administrative records, to assess the effects on measurement error. The findings suggest that interviewing methods without edit checks underestimate non-labour household income in the lower tail of the income distribution. The effects on estimates derived from total household income, such as poverty rates or transition rates into and out of poverty, are small.

  4. The Mars Science Laboratory Organic Check Material

    Science.gov (United States)

    Conrad, Pamela G.; Eigenbrode, J. E.; Mogensen, C. T.; VonderHeydt, M. O.; Glavin, D. P.; Mahaffy, P. M.; Johnson, J. A.

    2011-01-01

    The Organic Check Material (OCM) has been developed for use on the Mars Science Laboratory mission to serve as a sample standard for verification of organic cleanliness and characterization of potential sample alteration as a function of the sample acquisition and portioning process on the Curiosity rover. OCM samples will be acquired using the same procedures for drilling, portioning and delivery as are used to study martian samples with The Sample Analysis at Mars (SAM) instrument suite during MSL surface operations. Because the SAM suite is highly sensitive to organic molecules, the mission can better verify the cleanliness of Curiosity's sample acquisition hardware if a known material can be processed through SAM and compared with the results obtained from martian samples.

  5. Photogrammetric approach to automated checking of DTMs

    DEFF Research Database (Denmark)

    Potucková, Marketa

    2005-01-01

    Geometrically accurate digital terrain models (DTMs) are essential for orthoimage production and many other applications. Collecting reference data or visual inspection are reliable but time consuming and therefore expensive methods for finding errors in DTMs. In this paper, a photogrammetric...... approach to automated checking and improving of DTMs is evaluated. Corresponding points in two overlapping orthoimages are found by means of area based matching. Provided the image orientation is correct, discovered displacements correspond to DTM errors. Improvements of the method regarding its...... reliability are discussed. Thresholds for image matching parameters are applied. A topographic database can be used for eliminating areas where mismatches might occur. Experimental results based on coloured aerial images at the scale of 1:25 000 and DTM derived from 5 m contour lines are reported....

  6. Conformant Planning via Symbolic Model Checking

    CERN Document Server

    Cimatti, A; 10.1613/jair.774

    2011-01-01

    We tackle the problem of planning in nondeterministic domains, by presenting a new approach to conformant planning. Conformant planning is the problem of finding a sequence of actions that is guaranteed to achieve the goal despite the nondeterminism of the domain. Our approach is based on the representation of the planning domain as a finite state automaton. We use Symbolic Model Checking techniques, in particular Binary Decision Diagrams, to compactly represent and efficiently search the automaton. In this paper we make the following contributions. First, we present a general planning algorithm for conformant planning, which applies to fully nondeterministic domains, with uncertainty in the initial condition and in action effects. The algorithm is based on a breadth-first, backward search, and returns conformant plans of minimal length, if a solution to the planning problem exists, otherwise it terminates concluding that the problem admits no conformant solution. Second, we provide a symbolic representation ...

  7. Model Checking JAVA Programs Using Java Pathfinder

    Science.gov (United States)

    Havelund, Klaus; Pressburger, Thomas

    2000-01-01

    This paper describes a translator called JAVA PATHFINDER from JAVA to PROMELA, the "programming language" of the SPIN model checker. The purpose is to establish a framework for verification and debugging of JAVA programs based on model checking. This work should be seen in a broader attempt to make formal methods applicable "in the loop" of programming within NASA's areas such as space, aviation, and robotics. Our main goal is to create automated formal methods such that programmers themselves can apply these in their daily work (in the loop) without the need for specialists to manually reformulate a program into a different notation in order to analyze the program. This work is a continuation of an effort to formally verify, using SPIN, a multi-threaded operating system programmed in Lisp for the Deep-Space 1 spacecraft, and of previous work in applying existing model checkers and theorem provers to real applications.

  8. Automated Environment Generation for Software Model Checking

    Science.gov (United States)

    Tkachuk, Oksana; Dwyer, Matthew B.; Pasareanu, Corina S.

    2003-01-01

    A key problem in model checking open systems is environment modeling (i.e., representing the behavior of the execution context of the system under analysis). Software systems are fundamentally open since their behavior is dependent on patterns of invocation of system components and values defined outside the system but referenced within the system. Whether reasoning about the behavior of whole programs or about program components, an abstract model of the environment can be essential in enabling sufficiently precise yet tractable verification. In this paper, we describe an approach to generating environments of Java program fragments. This approach integrates formally specified assumptions about environment behavior with sound abstractions of environment implementations to form a model of the environment. The approach is implemented in the Bandera Environment Generator (BEG) which we describe along with our experience using BEG to reason about properties of several non-trivial concurrent Java programs.

  9. Statically checked documentation with design patterns

    DEFF Research Database (Denmark)

    Cornils, Aino; Hedin, Görel

    2000-01-01

    Over the past years, along with the increase in popularity of design patterns, some problems with the use of design patterns have been identified. The so-called tracing problem describes the difficulty in documenting software systems using design patterns. Initial approaches to solving the tracing...... problem have focused on guidelines for documenting design pattern roles and rules within a system, but experience has shown that both in the initial design, and especially in later code revisions, it is all too easy for code and documentation to diverge, rendering the documentation misleading. The authors...... present a flexible and extensible tool which enables designers to use design patterns in a safe and efficient way, which checks the design pattern rules, and which semi-automatically documents, and maintains the documentation of a software system...

  10. Statistical Model Checking for Product Lines

    DEFF Research Database (Denmark)

    ter Beek, Maurice H.; Legay, Axel; Lluch Lafuente, Alberto

    2016-01-01

    average cost of products (in terms of the attributes of the products’ features) and the probability of features to be (un)installed at runtime. The product lines must be modelled in QFLan, which extends the probabilistic feature-oriented language PFLan with novel quantitative constraints among features......We report on the suitability of statistical model checking for the analysis of quantitative properties of product line models by an extended treatment of earlier work by the authors. The type of analysis that can be performed includes the likelihood of specific product behaviour, the expected...... and on behaviour and with advanced feature installation options. QFLan is a rich process-algebraic specification language whose operational behaviour interacts with a store of constraints, neatly separating product configuration from product behaviour. The resulting probabilistic configurations and probabilistic...

  11. Probabilistic Model--Checking of Quantum Protocols

    CERN Document Server

    Gay, S; Papanikolaou, N; Gay, Simon; Nagarajan, Rajagopal; Papanikolaou, Nikolaos

    2005-01-01

    We establish fundamental and general techniques for formal verification of quantum protocols. Quantum protocols are novel communication schemes involving the use of quantum-mechanical phenomena for representation, storage and transmission of data. As opposed to quantum computers, quantum communication systems can and have been implemented using present-day technology; therefore, the ability to model and analyse such systems rigorously is of primary importance. While current analyses of quantum protocols use a traditional mathematical approach and require considerable understanding of the underlying physics, we argue that automated verification techniques provide an elegant alternative. We demonstrate these techniques through the use of PRISM, a probabilistic model-checking tool. Our approach is conceptually simpler than existing proofs, and allows us to disambiguate protocol definitions and assess their properties. It also facilitates detailed analyses of actual implemented systems. We illustrate our techniqu...

  12. Type Checking with XML Schema in XACT

    DEFF Research Database (Denmark)

    Kirkegaard, Christian; Møller, Anders

    ACT is an extension of Java for making type-safe XML transformations. Unlike other approaches, XACT provides a programming model based on XML templates and XPath together with a type checker based on data-flow analysis. We show how to extend the data-flow analysis technique used in the XACT system...... to support XML Schema as type formalism. The technique is able to model advanced features, such as type derivations and overloaded local element declarations, and also datatypes of attribute values and character data. Moreover, we introduce optional type annotations to improve modularity of the type checking....... The resulting system supports a flexible style of programming XML transformations and provides static guarantees of validity of the generated XML data....

  13. Effect of stimulus check size on multifocal visual evoked potentials.

    Science.gov (United States)

    Balachandran, Chandra; Klistorner, Alexander I; Graham, Stuart L

    2003-03-01

    In this study we examined the effects of varying stimulus check size on multifocal visual evoked potential (VEP). We also evaluated the currently used cortical scaling of stimulus segments. The ObjectiVision multifocal objective perimeter stimulates the eye with random check patterns at 56 cortically scaled segments within the visual field extending to a radius of 26 degrees. All cortically scaled segments have equal number of checks, which gradually increase in size from the center to the periphery, proportional to the size of the segment. Stimuli with 9, 16, 25, 36 and 49 checks/segment were tested on 10 eyes belonging to 10 normal subjects. The check size varied inversely with number of checks per segment. VEP was recorded using bipolar occipital cross electrodes (7 min/eye), the amplitude and latency of responses obtained were compared with the check size at different eccentricities. Our findings suggest that the existing setting with 16 checks/segment subtending 26' to 140' from center to periphery, is the most effective amongst all the check sizes. Decreasing the check size prolongs the latency in the central field only. Cortical scaling of segments generates responses of the same order of magnitude throughout the field, but could be improved slightly to enhance the signal from the outer two rings.

  14. Analysis of DIRAC's behavior using model checking with process algebra

    Science.gov (United States)

    Remenska, Daniela; Templon, Jeff; Willemse, Tim; Bal, Henri; Verstoep, Kees; Fokkink, Wan; Charpentier, Philippe; Graciani Diaz, Ricardo; Lanciotti, Elisa; Roiser, Stefan; Ciba, Krzysztof

    2012-12-01

    DIRAC is the grid solution developed to support LHCb production activities as well as user data analysis. It consists of distributed services and agents delivering the workload to the grid resources. Services maintain database back-ends to store dynamic state information of entities such as jobs, queues, staging requests, etc. Agents use polling to check and possibly react to changes in the system state. Each agent's logic is relatively simple; the main complexity lies in their cooperation. Agents run concurrently, and collaborate using the databases as shared memory. The databases can be accessed directly by the agents if running locally or through a DIRAC service interface if necessary. This shared-memory model causes entities to occasionally get into inconsistent states. Tracing and fixing such problems becomes formidable due to the inherent parallelism present. We propose more rigorous methods to cope with this. Model checking is one such technique for analysis of an abstract model of a system. Unlike conventional testing, it allows full control over the parallel processes execution, and supports exhaustive state-space exploration. We used the mCRL2 language and toolset to model the behavior of two related DIRAC subsystems: the workload and storage management system. Based on process algebra, mCRL2 allows defining custom data types as well as functions over these. This makes it suitable for modeling the data manipulations made by DIRAC's agents. By visualizing the state space and replaying scenarios with the toolkit's simulator, we have detected race-conditions and deadlocks in these systems, which, in several cases, were confirmed to occur in the reality. Several properties of interest were formulated and verified with the tool. Our future direction is automating the translation from DIRAC to a formal model.

  15. Applicability of refractometry for fast routine checking of hospital preparations.

    Science.gov (United States)

    Hendrickx, Stijn; Verón, Aurora Monteagudo; Van Schepdael, Ann; Adams, Erwin

    2016-04-30

    Quality control of hospital pharmacy formulations is of the utmost importance to ensure constant quality and to avoid potential mistakes before administration to the patient. In this study we investigated the applicability of refractometry as a fast, inexpensive and easy-to-use quality control measurement. Refractive indices (RI) of a multitude of different hospital formulations with varying concentrations of active compound were measured. The samples consisted of a number of binary aqueous solutions (one compound in water), complex aqueous solutions (multiple compounds in water or in a constant matrix), two suspensions and one emulsion. For all these formulations, linear regression analysis was performed, quality control limits determined and accuracy and repeatability were checked. Subsequently, actual hospital pharmacy samples were analyzed to check whether they were within the specified limits. For both binary and complex aqueous formulations, repeatability was good and a linear correlation for all samples could be observed on condition that the concentration of the active compound was sufficiently high. The refractometer was not sensitive enough for solutions of folic acid and levothyroxine, which had too low a concentration of active compound. Due to lack of homogeneity and light scattering, emulsions and suspensions do not seem suitable for quality control by refractometry. A mathematical equation was generated to predict the refractive index of an aqueous solution containing clonidine HCl as active compound. Values calculated from the equation were compared with measured values and deviations of all samples were found to be lower than 1.3%. In order to use refractometry in a hospital pharmacy for quality control of multicomponent samples, additional intermediate measurements would be required, to overcome the fact that refractometry is not compound specific. In conclusion, we found that refractometry could potentially be useful for daily, fast quality

  16. A correspondence between type checking via reduction and type checking via evaluation

    DEFF Research Database (Denmark)

    Sergey, Ilya; Clark, Dave

    2012-01-01

    We describe a derivational approach to proving the equivalence of different representations of a type system. Different ways of representing type assignments are convenient for particular applications such as reasoning or implementation, but some kind of correspondence between them should be proven....... In this paper we address two such semantics for type checking: one, due to Kuan et al., in the form of a term rewriting system and the other in the form of a traditional set of derivation rules. By employing a set of techniques investigated by Danvy et al., we mechanically derive the correspondence between...... a reduction-based semantics for type checking and a traditional one in the form of derivation rules, implemented as a recursive descent. The correspondence is established through a series of semantics-preserving functional program transformations....

  17. Analyzing Interoperability of Protocols Using Model Checking

    Institute of Scientific and Technical Information of China (English)

    WUPeng

    2005-01-01

    In practical terms, protocol interoperability testing is still laborious and error-prone with little effect, even for those products that have passed conformance testing. Deadlock and unsymmetrical data communication are familiar in interoperability testing, and it is always very hard to trace their causes. The previous work has not provided a coherent way to analyze why the interoperability was broken among protocol implementations under test. In this paper, an alternative approach is presented to analyzing these problems from a viewpoint of implementation structures. Sequential and concurrent structures are both representative implementation structures, especially in event-driven development model. Our research mainly discusses the influence of sequential and concurrent structures on interoperability, with two instructive conclusions: (a) a sequential structure may lead to deadlock; (b) a concurrent structure may lead to unsymmetrical data communication. Therefore, implementation structures carry weight on interoperability, which may not gain much attention before. To some extent, they are decisive on the result of interoperability testing. Moreover, a concurrent structure with a sound task-scheduling strategy may contribute to the interoperability of a protocol implementation. Herein model checking technique is introduced into interoperability analysis for the first time. As the paper shows, it is an effective way to validate developers' selections on implementation structures or strategies.

  18. Check-up examination: recommendations in adults.

    Science.gov (United States)

    Virgini, Vanessa; Meindl-Fridez, Claudine; Battegay, Edouard; Zimmerli, Lukas U

    2015-01-01

    Check-up examinations, or periodic health examinations (PHEs), have gained in importance during the last decades and are nowadays among the most common reasons for consultations in primary care settings. The aim of PHEs is to identify risk factors and early signs of disease, but also to prevent future illness by early intervention. Therefore, each PHE should include counselling, immunisation and physical examination according to the patient's age and gender. However, deciding whether to screen a patient and choosing the most appropriate screening method can be challenging for general practitioners. The U.S. Preventive Service Task Force (USPSTF) provides updated recommendations on different existing preventive care measures based on relevant literature review. The aim of this review is to provide an updated statement of recommendations regarding preventive care measures based mostly on the guidelines derived from the USPSTF and the Swiss Medical Board. Among the major updates, there is no recommendation anymore to routinely screen for breast cancer and prostate cancer in asymptomatic adults. Since 2013, however, the USPSTF recommends annual screening for lung cancer with low-dose CT in patients aged 55 to 80 years with a smoking history of ≥30 pack years. During PHEs, the physician should be alert to the patients' hidden agendas, which are the reason for one third of all consultations in primary care.

  19. Effective ambiguity checking in biosequence analysis

    Directory of Open Access Journals (Sweden)

    Giegerich Robert

    2005-06-01

    Full Text Available Abstract Background Ambiguity is a problem in biosequence analysis that arises in various analysis tasks solved via dynamic programming, and in particular, in the modeling of families of RNA secondary structures with stochastic context free grammars. Several types of analysis are invalidated by the presence of ambiguity. As this problem inherits undecidability (as we show here from the namely problem for context free languages, there is no complete algorithmic solution to the problem of ambiguity checking. Results We explain frequently observed sources of ambiguity, and show how to avoid them. We suggest four testing procedures that may help to detect ambiguity when present, including a just-in-time test that permits to work safely with a potentially ambiguous grammar. We introduce, for the special case of stochastic context free grammars and RNA structure modeling, an automated partial procedure for proving non-ambiguity. It is used to demonstrate non-ambiguity for several relevant grammars. Conclusion Our mechanical proof procedure and our testing methods provide a powerful arsenal of methods to ensure non-ambiguity.

  20. CFD analysis of a ball check microvalve

    Science.gov (United States)

    Cǎlimǎnescu, Ioan; Dumitrache, Constantin L.; Grigorescu, Lucian

    2015-02-01

    The microvalves with balls as seen before are used in many applications and their behaviour in terms of fluid dynamics mainly at their opening time (when as demonstrated the ball is bouncing up and down altering the flow parameters) is of a paramount importance. The present study is focused on a micro check ball valve circulating a fluid air-like (with the same constant proprieties). The CFD model is taking into account a transitory zone of functioning from zero time when the pressure inside a "tank" is reaching the opening pressure of the valve, to the final step 0.05 seconds when the ball is stabilizing after bouncing up and down. The geometry of the valve with dimensions in μm is given below (the model is comprising a "slice" of 5 μm thickness extracted from the entire valve. In this paper by using advanced numeric techniques, the behavior of the valve in its transitory opening stage was studied with credible and useful results for further optimisation studies.

  1. Analyzing Mode Confusion via Model Checking

    Science.gov (United States)

    Luettgen, Gerald; Carreno, Victor

    1999-01-01

    Mode confusion is one of the most serious problems in aviation safety. Today's complex digital flight decks make it difficult for pilots to maintain awareness of the actual states, or modes, of the flight deck automation. NASA Langley leads an initiative to explore how formal techniques can be used to discover possible sources of mode confusion. As part of this initiative, a flight guidance system was previously specified as a finite Mealy automaton, and the theorem prover PVS was used to reason about it. The objective of the present paper is to investigate whether state-exploration techniques, especially model checking, are better able to achieve this task than theorem proving and also to compare several verification tools for the specific application. The flight guidance system is modeled and analyzed in Murphi, SMV, and Spin. The tools are compared regarding their system description language, their practicality for analyzing mode confusion, and their capabilities for error tracing and for animating diagnostic information. It turns out that their strengths are complementary.

  2. Verifying Multi-Agent Systems via Unbounded Model Checking

    Science.gov (United States)

    Kacprzak, M.; Lomuscio, A.; Lasica, T.; Penczek, W.; Szreter, M.

    2004-01-01

    We present an approach to the problem of verification of epistemic properties in multi-agent systems by means of symbolic model checking. In particular, it is shown how to extend the technique of unbounded model checking from a purely temporal setting to a temporal-epistemic one. In order to achieve this, we base our discussion on interpreted systems semantics, a popular semantics used in multi-agent systems literature. We give details of the technique and show how it can be applied to the well known train, gate and controller problem. Keywords: model checking, unbounded model checking, multi-agent systems

  3. Toward a consistency cross-check of eddy covariance flux–based and biometric estimates of ecosystem carbon balance

    DEFF Research Database (Denmark)

    Luyssaert, S.; Reichstein, M.; Schulze, E.-D.

    2009-01-01

    ) estimates with biometric measurements of net primary production (NPP), autotrophic (Ra) and heterotrophic (Rh) respiration. The test starts with closing the CO2 balance to account for reasonable errors in each of the component fluxes. Failure to do so within the constraints will classify the flux estimates...

  4. Flux Calibration of the BATC Survey and Its Application for Checking the Consistency of the Oke-Gunn Standards

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Four Oke-Gunn (OG) standards, HD 19445, HD 84937, BD+26 2606 and BD+17 4708 are used as standard stars for flux calibration in the BATC project. They are also widely used in the visual wavelength region in many other photometric projects. Over the years we have observed on 58 good photometric nights, and the data obtained are used for flux calibration. Normally two or three OG standards are observed in every photometric night. The data are used for getting the atmo-spheric extinction coefficients and instrumental magnitude zero point. We also use these data to make inter-comparisons among the magnitudes of these standard stars.As a result, we found the magnitudes of HD 19445, HD 84937 and BD+17 4708 to agree well with those estimated in previous work to within 0.03 magnitude. How-ever, BD+26 2606 shows a larger deviation especially at short wavebands. Possible reasons are analyzed and the revised magnitudes are obtained for these standards.It is shown that the quality of flux calibration of the BATC fields is significantly improved by applying the new magnitudes.

  5. Data consistency checks for building a 3D model: A case study of Technical University, Delft Campus, The Netherlands

    NARCIS (Netherlands)

    Ghawana, T.; Zlatanova, S.

    2010-01-01

    GIS is changing rapidly its face with the advancement of computing technologies. From merely a 2D representation of real world features, it is moving to present more and more applications in 3D formats. Today 3D GIS is an essential way of handling the spatial data in urban planning. In cities where

  6. Data consistency checks for building a 3D model: A case study of Technical University, Delft Campus, The Netherlands

    NARCIS (Netherlands)

    Ghawana, T.; Zlatanova, S.

    2010-01-01

    GIS is changing rapidly its face with the advancement of computing technologies. From merely a 2D representation of real world features, it is moving to present more and more applications in 3D formats. Today 3D GIS is an essential way of handling the spatial data in urban planning. In cities where

  7. Toward a consistency cross-check of eddy covariance flux-based and biometric estimates of ecosystem carbon balance

    NARCIS (Netherlands)

    Luyssaert, S.; Reichstein, M.; Schulze, E.D.; Janssens, I.A.; Law, B.E.; Papale, D.; Dragoni, D.; Goulden, M.L.; Granier, A.; Kutch, W.L.; Linder, S.; Matteucci, G.; Moors, E.J.; Munger, J.W.; Pilegaard, K.; Saunders, M.; Falge, E.M.

    2009-01-01

    Quantification of an ecosystem's carbon balance and its components is pivotal for understanding both ecosystem functioning and global cycling. Several methods are being applied in parallel to estimate the different components of the CO2 balance. However, different methods are subject to different so

  8. 25 CFR 115.704 - May we accept for deposit into a trust account retirement checks/payments or pension fund checks...

    Science.gov (United States)

    2010-04-01

    ... checks/payments or pension fund checks/payments even though those funds are not specified in § 115.702... May we accept for deposit into a trust account retirement checks/payments or pension fund checks.../payments or pension fund checks/payments or any funds from sources that are not identified in the table in...

  9. Consistency of trace norm minimization

    CERN Document Server

    Bach, Francis

    2007-01-01

    Regularization by the sum of singular values, also referred to as the trace norm, is a popular technique for estimating low rank rectangular matrices. In this paper, we extend some of the consistency results of the Lasso to provide necessary and sufficient conditions for rank consistency of trace norm minimization with the square loss. We also provide an adaptive version that is rank consistent even when the necessary condition for the non adaptive version is not fulfilled.

  10. High SNR Consistent Compressive Sensing

    OpenAIRE

    Kallummil, Sreejith; Kalyani, Sheetal

    2017-01-01

    High signal to noise ratio (SNR) consistency of model selection criteria in linear regression models has attracted a lot of attention recently. However, most of the existing literature on high SNR consistency deals with model order selection. Further, the limited literature available on the high SNR consistency of subset selection procedures (SSPs) is applicable to linear regression with full rank measurement matrices only. Hence, the performance of SSPs used in underdetermined linear models ...

  11. Perancangan dan Implementasi Cyclic Redundancy Check – 16 sebagai Metode Error Checking pada Transmisi Pesan Protokol Modbus Remote Terminal Unit Berbasis Microcontroller Unit

    Directory of Open Access Journals (Sweden)

    Arief Wisnu Wardhana

    2016-03-01

    Full Text Available This paper presents about the Cyclic Redundancy Check – 16, a generator polynomial for error detection, which is normally used in MODBUS Remote Terminal Unit. It starts with explaining the noise phenomena that are often generated into a useful signal when it is transmitted through a noisy channel. Some types of error which usually affects bits of a transmitted data bytes are introduced. The complete method for designing a good generator polynomial for detecting the error is then presented. Next, Cyclic Redundancy Check -16 as an example of generator polynimial is discussed. The explanation includes method for software implementation of the CRC. Two methods are introduced which are loop – driven method and table - driven method. Finally, result of designed generator polynomial is shown, which consists of the algorithm and the routine example. The CRC -16 routine is then tested using some MODBUS messages.

  12. PENERAPAN MODEL PEMBELAJARAN KOOPERATIF TIPE PAIR CHECKS PEMECAHAN MASALAH UNTUK MENINGKATKAN SOCIAL SKILL SISWA

    Directory of Open Access Journals (Sweden)

    R. Lestari

    2012-12-01

    Full Text Available Tujuan penelitian tindakan kelas ini untuk mengetahui pengaruh proses pembelajaran dengan menggunakan model pembelajaran kooperatif tipe Pair Checks pemecahan masalah terhadap peningkatan social skill siswa. Pada proses penerapan model pembelajaran kooperatif tipe Pair Checks pemecahan masalah siswa dibagi dalam kelompok-kelompok dan satu kelompok terdiri dari dua orang. Setiap kelompok berdiskusi untuk menyelesaikan suatu masalah, kemudian hasil diskusi kelompok akan dicek oleh pasangan dari kelompok lain. Metode Penelitian yang digunakan adalah penelitian tindakan kelas yang dilaksanakan dua siklus. Metode pengumpulan data menggunakan tes dan angket skala sikap, sedangkan teknik analisis data menggunakan teknik analisis data kuantitatif. Social Skill siswa dari siklus I ke siklus II mengalami peningkatan. Hal ini didapatkan dari data angket skala sikap siklus I ke siklus II ketuntasan klasikalnya meningkat dan sebagian besar siswa sudah memiliki social skill yang baik. Hasil belajar kognitif siswa juga mengalami peningkatan. Model pembelajaran kooperatif tipe Pair Checks pemecahan masalah dapat meningkatkan social skill siswa.This two cycles-action research aimed to know learning process applying cooperative learning model-pair checks problem solving type and improvement of student’s social skills. The process of the model was as follows: deviding students into some groups consisting of two students, solving problem by each group and checking result of the discussion by other groups. Data collection method used was test and the use of attitude scale questionnaire, while technique of data analysis used was quantitative data analysis technique. The data analysis result showed that there was an increase of student’s social skill and students’ achievement from cycle one to two. It is concluded that cooperative learning model-pair checks problem solving type can enhance student’s social skills

  13. PENERAPAN MODEL PEMBELAJARAN KOOPERATIF TIPE PAIR CHECKS PEMECAHAN MASALAH UNTUK MENINGKATKAN SOCIAL SKILL SISWA

    Directory of Open Access Journals (Sweden)

    R. Lestari

    2012-07-01

    Full Text Available Tujuan penelitian tindakan kelas ini untuk mengetahui pengaruh proses pembelajaran dengan menggunakan model pembelajaran kooperatif tipe Pair Checks pemecahan masalah terhadap peningkatan social skill siswa. Pada proses penerapan model pembelajaran kooperatif tipe Pair Checks pemecahan masalah siswa dibagi dalam kelompok-kelompok dan satu kelompok terdiri dari dua orang. Setiap kelompok berdiskusi untuk menyelesaikan suatu masalah, kemudian hasil diskusi kelompok akan dicek oleh pasangan dari kelompok lain. Metode Penelitian yang digunakan adalah penelitian tindakan kelas yang dilaksanakan dua siklus. Metode pengumpulan data menggunakan tes dan angket skala sikap, sedangkan teknik analisis data menggunakan teknik analisis data kuantitatif. Social Skill siswa dari siklus I ke siklus II mengalami peningkatan. Hal ini didapatkan dari data angket skala sikap siklus I ke siklus II ketuntasan klasikalnya meningkat dan sebagian besar siswa sudah memiliki social skill yang baik. Hasil belajar kognitif siswa juga mengalami peningkatan. Model pembelajaran kooperatif tipe Pair Checks pemecahan masalah dapat meningkatkan social skill siswa.This two cycles-action research aimed to know learning process applying cooperative learning model-pair checks problem solving type and improvement of student’s social skills. The process of the model was as follows: deviding students into some groups consisting of two students, solving problem by each group and checking result of the discussion by other groups. Data collection method used was test and the use of attitude scale questionnaire, while technique of data analysis used was quantitative data analysis technique. The data analysis result showed that there was an increase of student’s social skill and students’ achievement from cycle one to two. It is concluded that cooperative learning model-pair checks problem solving type can enhance student’s social skills

  14. Be SMART: examining the experience of implementing the NHS Health Check in UK primary care.

    Science.gov (United States)

    Shaw, Rachel L; Pattison, Helen M; Holland, Carol; Cooke, Richard

    2015-01-22

    The NHS Health Check was designed by UK Department of Health to address increased prevalence of cardiovascular disease by identifying risk levels and facilitating behaviour change. It constituted biomedical testing, personalised advice and lifestyle support. The objective of the study was to explore Health Care Professionals' (HCPs) and patients' experiences of delivering and receiving the NHS Health Check in an inner-city region of England. Patients and HCPs in primary care were interviewed using semi-structured schedules. Data were analysed using Thematic Analysis. Four themes were identified. Firstly, Health Check as a test of 'roadworthiness' for people. The roadworthiness metaphor resonated with some patients but it signified a passive stance toward illness. Some patients described the check as useful in the theme, Health check as revelatory. HCPs found visual aids demonstrating levels of salt/fat/sugar in everyday foods and a 'traffic light' tape measure helpful in communicating such 'revelations' with patients. Being SMART and following the protocolrevealed that few HCPs used SMART goals and few patients spoke of them. HCPs require training to understand their rationale compared with traditional advice-giving. The need for further follow-up revealed disparity in follow-ups and patients were not systematically monitored over time. HCPs' training needs to include the use and evidence of the effectiveness of SMART goals in changing health behaviours. The significance of fidelity to protocol needs to be communicated to HCPs and commissioners to ensure consistency. Monitoring and measurement of follow-up, e.g., tracking of referrals, need to be resourced to provide evidence of the success of the NHS Health Check in terms of healthier lifestyles and reduced CVD risk.

  15. 31 CFR 240.11 - Treasury Check Offset.

    Science.gov (United States)

    2010-07-01

    ... 31 Money and Finance: Treasury 2 2010-07-01 2010-07-01 false Treasury Check Offset. 240.11 Section 240.11 Money and Finance: Treasury Regulations Relating to Money and Finance (Continued) FISCAL SERVICE, DEPARTMENT OF THE TREASURY FINANCIAL MANAGEMENT SERVICE INDORSEMENT AND PAYMENT OF CHECKS...

  16. Dynamic State Space Partitioning for External Memory Model Checking

    DEFF Research Database (Denmark)

    Evangelista, Sami; Kristensen, Lars Michael

    2009-01-01

    We describe a dynamic partitioning scheme usable by model checking techniques that divide the state space into partitions, such as most external memory and distributed model checking algorithms. The goal of the scheme is to reduce the number of transitions that link states belonging to different...

  17. BACKGROUND ELIMINATION IN BANK CHECKS USING GREYSCALE MORPHOLOGY

    NARCIS (Netherlands)

    Shetty, S.; Shridhar, M.; Houle, G.

    2004-01-01

    In this paper we propose a new method of background elimination in personal bank checks to facilitate machine recognition of user entered information. One of the key problems that affect the extraction of user entered information is the wide diversity of the backgrounds of checks. They have differen

  18. 31 CFR 10.31 - Negotiation of taxpayer checks.

    Science.gov (United States)

    2010-07-01

    ... 31 Money and Finance: Treasury 1 2010-07-01 2010-07-01 false Negotiation of taxpayer checks. 10.31 Section 10.31 Money and Finance: Treasury Office of the Secretary of the Treasury PRACTICE BEFORE THE... § 10.31 Negotiation of taxpayer checks. A practitioner who prepares tax returns may not endorse...

  19. 16 CFR 240.12 - Checking customer's use of payments.

    Science.gov (United States)

    2010-01-01

    ... 16 Commercial Practices 1 2010-01-01 2010-01-01 false Checking customer's use of payments. 240.12 Section 240.12 Commercial Practices FEDERAL TRADE COMMISSION GUIDES AND TRADE PRACTICE RULES GUIDES FOR ADVERTISING ALLOWANCES AND OTHER MERCHANDISING PAYMENTS AND SERVICES § 240.12 Checking customer's use...

  20. 19 CFR 111.41 - Endorsement of checks.

    Science.gov (United States)

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false Endorsement of checks. 111.41 Section 111.41 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY CUSTOMS BROKERS Duties and Responsibilities of Customs Brokers § 111.41 Endorsement of checks....

  1. Development of a stainless steel check valve for cryogenic applications

    NARCIS (Netherlands)

    Veenstra, T.T.; Venhorst, G.C.F.; Burger, J.F.; Holland, H.J.; Brake, ter H.J.M.; Sirbi, A.; Rogalla, H.

    2007-01-01

    This paper describes the development of a check valve for use in a sorption compressor that will drive a 10 mW 4.5 K Joule–Thomson cryocooler. For the check valve extremely low backflow rates are tolerable at an operating temperature of the valve of 50 K. To fulfill these requirements, the sealing m

  2. U.T.E.S. Interest Check List.

    Science.gov (United States)

    Manpower Administration (DOL), Washington, DC.

    The revised Oregon metro edition of the U.T.E.S. interest check list for intermediate education aims at helping students decide what kinds of work they would like and lists activities that are found in a broad range of industries and occupations in the nation. Specific instructions advise the student that the check list is not a test and that…

  3. 26 CFR 301.6657-1 - Bad checks.

    Science.gov (United States)

    2010-04-01

    ... 26 Internal Revenue 18 2010-04-01 2010-04-01 false Bad checks. 301.6657-1 Section 301.6657-1... Additions to the Tax and Additional Amounts § 301.6657-1 Bad checks. (a) In general. Except as provided in... district director that it was tendered in good faith with reasonable cause to believe that it would be...

  4. Strategic Planning through Model Checking of ATL Formulae

    NARCIS (Netherlands)

    Jamroga, W.J.; Rutkowski, L.; Siekmann, J.; Tadeusiewicz, R.; Zadeh, L.A.

    2004-01-01

    Model checking of temporal logic has already been proposed for automatic planning. In this paper, we introduce a simple adaptation of the ATL model checking algorithm that returns a strategy to achieve given goal. We point out that the algorithm generalizes minimaxing, and that ATL models generalize

  5. Check-up Measurement (update). Deliverable D5.22

    NARCIS (Netherlands)

    Holtzer, A.C.G.; Giessen, A.M.D. van der; Djurica, M.

    2015-01-01

    This deliverable D5.22 presents the GEN6 check-up measurement. It describes the most prominent outcomes of the GEN6 project up to this point in time. The check-up measurement helps to focus the monitoring towards the most relevant achievements of the project, such that an efficient and well-targeted

  6. Modern Trends in Airport Self Check-in Kiosks

    Directory of Open Access Journals (Sweden)

    Jarmila Sabatová

    2016-10-01

    Full Text Available Due to maintain the flow of the check-in process of air passengers, it is essential that services that ensure this process have been carried as quickly and effectively. One of the major current problems in this area is the efficiency of clearance of a large number of passengers over the check-in counters. By the gradual development of so-called self check-in services eventually delegate some activities in check-in process to passengers and the entire clearance process to speed up. In this article the authors deal with current state of the use of self check-in services in the world and predict the expected evolution of these services in the future. Subsequently, the authors present a new design of self-service kiosk and graphical user interface (GUI of application such self-service check-in kiosk based on the analysis of the functions and features of similar solutions available on the market and with considering all currently known IATA requirements and the criteria relating to disabled passengers in order to lighten the load check-in counters and thereby accelerated the clearance of the passenger at the airport. The aim of the authors was to create a cost competitive solution offering such new features and services that do not offer other solutions, with an emphasis on improving the efficiency of the check-in process of passengers at the airport.

  7. 76 FR 16861 - Availability of Funds and Collection of Checks

    Science.gov (United States)

    2011-03-25

    ... proposed rule. \\29\\ See Regulation CC Sec. 229.20 and EFA Act Sec. 608. A state's funds-availability law...: Background Regulation CC (12 CFR part 229) implements the Expedited Funds Availability Act (EFA Act) and the Check Clearing for the 21st Century Act (Check 21 Act).\\1\\ The Board implemented the EFA Act in...

  8. Not Just right experiences as ironic result of perseverative checking

    NARCIS (Netherlands)

    van Dis, E.A.M.; van den Hout, M.A.

    2016-01-01

    Objective: patients with obsessive-compulsive disorder (ocD) typically report to have “not just right experiences” (NJRE). up till now it is unclear which behavioral ocD features may give rise to NJREs. We used an induced checking paradigm to experimentally study whether perseverative checking

  9. Finding consistent gene transmission patterns on large and complex pedigrees.

    Science.gov (United States)

    Pirinen, Matti; Gasbarra, Dario

    2006-01-01

    A heuristic algorithm for finding gene transmission patterns on large and complex pedigrees with partially observed genotype data is proposed. The method can be used to generate an initial point for a Markov chain Monte Carlo simulation or to check that the given pedigree and the genotype data are consistent. In small pedigrees, the algorithm is exact by exhaustively enumerating all possibilities, but, in large pedigrees, with a considerable amount of unknown data, only a subset of promising configurations can actually be checked. For that purpose, the configurations are ordered by combining the approximative conditional probability distribution of the unknown genotypes with the information on the relationships between individuals. We also introduce a way to divide the task into subparts, which has been shown to be useful in large pedigrees. The algorithm has been implemented in a program called APE (Allelic Path Explorer) and tested in three different settings with good results.

  10. Symbolic Model Checking for Sequential Circuit Verification

    Science.gov (United States)

    1993-07-15

    umI4A8807, and in paut by the Semiconductor Research Corporation under Contract 92cW~-294. The fourti author was supported by an AT&T Bell Laboamtories Ph.D...found late in the design phase of a digital circuit are a major cause of unexpected delays in realising the circuit in hardware. As a result, interest in...block diagram of the stack. It consists of an array of d cells, each cell consisting of a control part, a data part and a completion tree. The data

  11. Using hospital pharmacy technicians to check unit dose carts.

    Science.gov (United States)

    Spooner, S H; Emerson, P K

    1994-05-01

    This study was undertaken to evaluate the accuracy of technicians checking unit dose carts as compared with pharmacists checking unit dose carts. The final (after check) fill in both arms of the study was evaluated for accuracy on the same five criteria: 1) correct drug, 2) correct dose, 3) correct dosage form, 4) correct quantity, and 5) expiration date. In the technician arm, 7571 doses were checked with 10 errors, giving a 99.76% (1 error in 420) accuracy. In the pharmacist arm of the study, 3116 doses were checked with 34 total errors, giving a 98.91% (1 error in 92) accuracy. The results of this study indicate that technicians would have as high if not a higher accuracy rate than pharmacists. Using pharmacy technicians in this role should continue the same level of care by maintaining a high accuracy in medication dispensing and provide greater economic benefit to the organization by using technical rather than professional personnel.

  12. Counterexample-Preserving Reduction for Symbolic Model Checking

    Directory of Open Access Journals (Sweden)

    Wanwei Liu

    2014-01-01

    Full Text Available The cost of LTL model checking is highly sensitive to the length of the formula under verification. We observe that, under some specific conditions, the input LTL formula can be reduced to an easier-to-handle one before model checking. In such reduction, these two formulae need not to be logically equivalent, but they share the same counterexample set w.r.t the model. In the case that the model is symbolically represented, the condition enabling such reduction can be detected with a lightweight effort (e.g., with SAT-solving. In this paper, we tentatively name such technique “counterexample-preserving reduction” (CePRe, for short, and the proposed technique is evaluated by conducting comparative experiments of BDD-based model checking, bounded model checking, and property directed reachability-(IC3 based model checking.

  13. Consistency argued students of fluid

    Science.gov (United States)

    Viyanti; Cari; Suparmi; Winarti; Slamet Budiarti, Indah; Handika, Jeffry; Widyastuti, Fatma

    2017-01-01

    Problem solving for physics concepts through consistency arguments can improve thinking skills of students and it is an important thing in science. The study aims to assess the consistency of the material Fluid student argmentation. The population of this study are College students PGRI Madiun, UIN Sunan Kalijaga Yogyakarta and Lampung University. Samples using cluster random sampling, 145 samples obtained by the number of students. The study used a descriptive survey method. Data obtained through multiple-choice test and interview reasoned. Problem fluid modified from [9] and [1]. The results of the study gained an average consistency argmentation for the right consistency, consistency is wrong, and inconsistent respectively 4.85%; 29.93%; and 65.23%. Data from the study have an impact on the lack of understanding of the fluid material which is ideally in full consistency argued affect the expansion of understanding of the concept. The results of the study as a reference in making improvements in future studies is to obtain a positive change in the consistency of argumentations.

  14. Extending Model Checking to Object Process Validation

    NARCIS (Netherlands)

    Rein, van H.

    2002-01-01

    Object-oriented techniques allow the gathering and modelling of system requirements in terms of an application area. The expression of data and process models at that level is a great asset in communication with non-technical people in that area, but it does not necessarily lead to consistent models

  15. Coordinating user interfaces for consistency

    CERN Document Server

    Nielsen, Jakob

    2001-01-01

    In the years since Jakob Nielsen's classic collection on interface consistency first appeared, much has changed, and much has stayed the same. On the one hand, there's been exponential growth in the opportunities for following or disregarding the principles of interface consistency-more computers, more applications, more users, and of course the vast expanse of the Web. On the other, there are the principles themselves, as persistent and as valuable as ever. In these contributed chapters, you'll find details on many methods for seeking and enforcing consistency, along with bottom-line analys

  16. Consistency of Random Survival Forests.

    Science.gov (United States)

    Ishwaran, Hemant; Kogalur, Udaya B

    2010-07-01

    We prove uniform consistency of Random Survival Forests (RSF), a newly introduced forest ensemble learner for analysis of right-censored survival data. Consistency is proven under general splitting rules, bootstrapping, and random selection of variables-that is, under true implementation of the methodology. Under this setting we show that the forest ensemble survival function converges uniformly to the true population survival function. To prove this result we make one key assumption regarding the feature space: we assume that all variables are factors. Doing so ensures that the feature space has finite cardinality and enables us to exploit counting process theory and the uniform consistency of the Kaplan-Meier survival function.

  17. Astronaut Neil A. Armstrong Undergoes Communications Systems Final Check

    Science.gov (United States)

    1969-01-01

    Dunned in his space suit, mission commander Neil A. Armstrong does a final check of his communications system before before the boarding of the Apollo 11 mission. Launched via a Saturn V launch vehicle, the first manned lunar mission launched from the Kennedy Space Center, Florida on July 16, 1969 and safely returned to Earth on July 24, 1969. The Saturn V vehicle was developed by the Marshall Space Flight Center (MSFC) under the direction of Dr. Wernher von Braun. The 3-man crew aboard the flight consisted of astronauts Armstrong; Michael Collins, Command Module (CM) pilot; and Edwin E. Aldrin, Jr., Lunar Module (LM) Pilot. Armstrong was the first human to ever stand on the lunar surface, followed by Edwin (Buzz) Aldrin. Meanwhile, astronaut Collins piloted the CM in a parking orbit around the Moon. During a 2½ hour surface exploration, the crew collected 47 pounds of lunar surface material which was returned to Earth for analysis. With the success of Apollo 11, the national objective to land men on the Moon and return them safely to Earth had been accomplished.

  18. 12 CFR Appendix A to Part 229 - Routing Number Guide to Next-Day Availability Checks and Local Checks

    Science.gov (United States)

    2010-01-01

    ... Checks and Local Checks A Appendix A to Part 229 Banks and Banking FEDERAL RESERVE SYSTEM (CONTINUED... Association. The routing number takes two forms: a fractional form and a nine-digit form. A paying bank... bank. B. The first four digits of the nine-digit routing number (and the denominator of the fractional...

  19. Process Fairness and Dynamic Consistency

    NARCIS (Netherlands)

    S.T. Trautmann (Stefan); P.P. Wakker (Peter)

    2010-01-01

    textabstractAbstract: When process fairness deviates from outcome fairness, dynamic inconsistencies can arise as in nonexpected utility. Resolute choice (Machina) can restore dynamic consistency under nonexpected utility without using Strotz's precommitment. It can similarly justify dynamically

  20. Gravitation, Causality, and Quantum Consistency

    CERN Document Server

    Hertzberg, Mark P

    2016-01-01

    We examine the role of consistency with causality and quantum mechanics in determining the properties of gravitation. We begin by constructing two different classes of interacting theories of massless spin 2 particles -- gravitons. One involves coupling the graviton with the lowest number of derivatives to matter, the other involves coupling the graviton with higher derivatives to matter, making use of the linearized Riemann tensor. The first class requires an infinite tower of terms for consistency, which is known to lead uniquely to general relativity. The second class only requires a finite number of terms for consistency, which appears as a new class of theories of massless spin 2. We recap the causal consistency of general relativity and show how this fails in the second class for the special case of coupling to photons, exploiting related calculations in the literature. In an upcoming publication [1] this result is generalized to a much broader set of theories. Then, as a causal modification of general ...

  1. Time-consistent and market-consistent evaluations

    NARCIS (Netherlands)

    Pelsser, A.; Stadje, M.A.

    2014-01-01

    We consider evaluation methods for payoffs with an inherent financial risk as encountered for instance for portfolios held by pension funds and insurance companies. Pricing such payoffs in a way consistent to market prices typically involves combining actuarial techniques with methods from mathemati

  2. Check dam and polyacrylamide performance under simulated stormwater runoff.

    Science.gov (United States)

    Kang, Jihoon; McCaleb, Melanie M; McLaughlin, Richard A

    2013-11-15

    High levels of turbidity and fine suspended sediments are often found in stormwater discharges from construction sites even when best management practices (BMPs) for sediment control are in place. This study evaluated turbidity reduction by three check dam types: 1) rock check dam representing a standard BMP, 2) excelsior wattle representing a fiber check dam (FCD), and 3) rock check dam wrapped with excelsior erosion control blanket (rock + excelsior ECB) representing an alternative FCD. Three check dams (all same type) were installed in a lined, 24-m ditch on a 5-7% slope and three consecutive simulated stormwater flows were run in the ditch. Additional tests were performed by adding granular polyacrylamide (PAM) on the check dams in the same manner using two sediment sources differing in clay content. Without PAM treatment, significantly higher effluent turbidity (>900 nephelometric turbidity units (NTU)) exited the ditch with rock check dams than with excelsior wattles or rock + excelsior ECBs (dam types was in the order of excelsior wattle > rock + excelsior ECB > rock check dam, indicating better water pooling behind the wattle. The PAM treatment reduced turbidity substantially (>75% relative to no PAM treatment) for all check dam types and it was very effective in excelsior wattles (<57 NTU) and rock + excelsior ECBs (<90 NTU) even during the third storm event. This study demonstrates that the passive treatment of runoff with PAM on FCDs (or rock + excelsior ECB) in construction site ditches can be very effective for sediment retention and turbidity reduction.

  3. Market-consistent actuarial valuation

    CERN Document Server

    Wüthrich, Mario V

    2016-01-01

    This is the third edition of this well-received textbook, presenting powerful methods for measuring insurance liabilities and assets in a consistent way, with detailed mathematical frameworks that lead to market-consistent values for liabilities. Topics covered are stochastic discounting with deflators, valuation portfolio in life and non-life insurance, probability distortions, asset and liability management, financial risks, insurance technical risks, and solvency. Including updates on recent developments and regulatory changes under Solvency II, this new edition of Market-Consistent Actuarial Valuation also elaborates on different risk measures, providing a revised definition of solvency based on industry practice, and presents an adapted valuation framework which takes a dynamic view of non-life insurance reserving risk.

  4. Consistent Histories in Quantum Cosmology

    CERN Document Server

    Craig, David A; 10.1007/s10701-010-9422-6

    2010-01-01

    We illustrate the crucial role played by decoherence (consistency of quantum histories) in extracting consistent quantum probabilities for alternative histories in quantum cosmology. Specifically, within a Wheeler-DeWitt quantization of a flat Friedmann-Robertson-Walker cosmological model sourced with a free massless scalar field, we calculate the probability that the univese is singular in the sense that it assumes zero volume. Classical solutions of this model are a disjoint set of expanding and contracting singular branches. A naive assessment of the behavior of quantum states which are superpositions of expanding and contracting universes may suggest that a "quantum bounce" is possible i.e. that the wave function of the universe may remain peaked on a non-singular classical solution throughout its history. However, a more careful consistent histories analysis shows that for arbitrary states in the physical Hilbert space the probability of this Wheeler-DeWitt quantum universe encountering the big bang/crun...

  5. PREREQUISITE PROGRAMMES IN OWN CHECKS IN STATUTORY AND VOLUNTARY LEGISLATION

    Directory of Open Access Journals (Sweden)

    E. Guidi

    2012-08-01

    Full Text Available Prerequisite Programmes approach is a requirement for implementing a correct own check plan. This new approach, born according to the European Legislation, is completely recognized by third Nation Authorities and private Inspection and Accreditation Bodies. This method is the basis to verify if an own check system is under control and to verify if corrective actions are built up to warrant hygienic production standards. The present work demonstrate that a correct own check plan is built up only by a Pre Requisites Program approach. The new UNI EN ISO 22000:2005 standard describe this concept specifying the difference between PRP and CCP.

  6. Towards an automated checked baggage inspection system augmented with robots

    Science.gov (United States)

    DeDonato, Matthew P.; Dimitrov, Velin; Padır, Taskin

    2014-05-01

    We present a novel system for enhancing the efficiency and accuracy of checked baggage screening process at airports. The system requirements address the identification and retrieval of objects of interest that are prohibited in a checked luggage. The automated testbed is comprised of a Baxter research robot designed by Rethink Robotics for luggage and object manipulation, and a down-looking overhead RGB-D sensor for inspection and detection. We discuss an overview of current system implementations, areas of opportunity for improvements, robot system integration challenges, details of the proposed software architecture and experimental results from a case study for identifying various kinds of lighters in checked bags.

  7. Implementing Model-Check for Employee and Management Satisfaction

    Science.gov (United States)

    Jones, Corey; LaPha, Steven

    2013-01-01

    This presentation will discuss methods to which ModelCheck can be implemented to not only improve model quality, but also satisfy both employees and management through different sets of quality checks. This approach allows a standard set of modeling practices to be upheld throughout a company, with minimal interaction required by the end user. The presenter will demonstrate how to create multiple ModelCheck standards, preventing users from evading the system, and how it can improve the quality of drawings and models.

  8. The Importance of being consistent

    CERN Document Server

    Wasserman, Adam; Jiang, Kaili; Kim, Min-Cheol; Sim, Eunji; Burke, Kieron

    2016-01-01

    We review the role of self-consistency in density functional theory. We apply a recent analysis to both Kohn-Sham and orbital-free DFT, as well as to Partition-DFT, which generalizes all aspects of standard DFT. In each case, the analysis distinguishes between errors in approximate functionals versus errors in the self-consistent density. This yields insights into the origins of many errors in DFT calculations, especially those often attributed to self-interaction or delocalization error. In many classes of problems, errors can be substantially reduced by using `better' densities. We review the history of these approaches, many of their applications, and give simple pedagogical examples.

  9. An Extended Model Driven Framework for End-to-End Consistent Model Transformation

    Directory of Open Access Journals (Sweden)

    Mr. G. Ramesh

    2016-08-01

    Full Text Available Model Driven Development (MDD results in quick transformation from models to corresponding systems. Forward engineering features of modelling tools can help in generating source code from models. To build a robust system it is important to have consistency checking in the design models and the same between design model and the transformed implementation. Our framework named as Extensible Real Time Software Design Inconsistency Checker (XRTSDIC proposed in our previous papers supports consistency checking in design models. This paper focuses on automatic model transformation. An algorithm and defined transformation rules for model transformation from UML class diagram to ERD and SQL are being proposed. The model transformation bestows many advantages such as reducing cost of development, improving quality, enhancing productivity and leveraging customer satisfaction. Proposed framework has been enhanced to ensure that the transformed implementations conform to their model counterparts besides checking end-to-end consistency.

  10. Consistent supersymmetric decoupling in cosmology

    NARCIS (Netherlands)

    Sousa Sánchez, Kepa

    2012-01-01

    The present work discusses several problems related to the stability of ground states with broken supersymmetry in supergravity, and to the existence and stability of cosmic strings in various supersymmetric models. In particular we study the necessary conditions to truncate consistently a sector o

  11. Monitoring Blood Sugar: The Importance of Checking Blood Sugar Levels

    Science.gov (United States)

    ... to Be Smart About Social Media Monitoring Blood Sugar KidsHealth > For Parents > Monitoring Blood Sugar Print A ... Tests Record Keeping The Importance of Checking Blood Sugar Levels Besides helping to keep blood sugar levels ( ...

  12. Developments of the in-check platform for diagnostic applications

    Science.gov (United States)

    Palmieri, Michele; Alessi, Enrico; Conoci, Sabrina; Marchi, Mauro; Panvini, Gaetano

    2008-02-01

    In-Check is STMicroelectronics proprietary platform for molecular diagnostics. In-Check lays its foundations on the monolithic integration of microelectronics and micromachining technology MEMS, with microfluidic and optical features, bio-chemical surface functionalization and molecular biology. It comprises a core lab-on-chip device, control and reading instrumentation, a complete suite of software modules, and application protocols. Leveraging on such capabilities, In-Check enables fast, highly sensitive and specific, multi-analytical capability of nucleic acid analysis. The platform provides a unique combination of nucleic acid amplification, by polymerase-chain-reaction and target identification and typing by DNA microarray. These integrated biological functionalities together with top quality standard and process control are key features for a platform to be accepted by the highly demanding modern medical diagnostic. This paper describes recent developments of In-Check and some core biological characterizations.

  13. An Item Factor Analysis of the Mooney Problem Check List

    Science.gov (United States)

    Stewart, David W.; Deiker, Thomas

    1976-01-01

    Explores the factor structure of the Mooney Problem Check List (MPCL) at the junior and senior high school level by undertaking a large obverse factor analysis of item responses in three adolescent criterion groups. (Author/DEP)

  14. Checking Patient's Drug History May Help Curb Opioid Abuse

    Science.gov (United States)

    ... a legitimate prescription," said study co-author Colleen Carey. She's an assistant professor of policy analysis and ... by law to check them before writing prescriptions, Carey and her colleagues noted in a university news ...

  15. Cyclic Redundancy Checking (CRC) Accelerator for Embedded Processor Datapaths

    National Research Council Canada - National Science Library

    Abdul Rehman Buzdar; Liguo Sun; Rao Kashif; Muhammad Waqar Azhar; Muhammad Imran Khan

    2017-01-01

    We present the integration of a multimode Cyclic Redundancy Checking (CRC) accelerator unit with an embedded processor datapath to enhance the processor performance in terms of execution time and energy efficiency...

  16. Exercise: When to Check with Your Doctor First

    Science.gov (United States)

    Healthy Lifestyle Fitness Keeping physically active is key to a healthy lifestyle. But sometimes it's best to check with ... 11, 2016 Original article: http://www.mayoclinic.org/healthy-lifestyle/fitness/in-depth/exercise/art-20047414 . Mayo Clinic Footer ...

  17. Monitoring Blood Sugar: The Importance of Checking Blood Sugar Levels

    Science.gov (United States)

    ... Feeding Your 1- to 2-Year-Old Monitoring Blood Sugar KidsHealth > For Parents > Monitoring Blood Sugar A ... Other Tests Record Keeping The Importance of Checking Blood Sugar Levels Besides helping to keep blood sugar ...

  18. Performance of Compiler-Assisted Memory Safety Checking

    Science.gov (United States)

    2014-08-01

    Performance of Compiler -Assisted Memory Safety Checking David Keaton Robert C. Seacord August 2014 TECHNICAL NOTE CMU/SEI-2014-TN...014 | vii Abstract Buffer overflows affect a large installed base of C code. This technical note describes the criteria for deploying a compiler ...describes a modification to the LLVM compiler to enable hoisting bounds checks from loops and functions. This proof-of-concept prototype has been used

  19. Model checking biological systems described using ambient calculus

    DEFF Research Database (Denmark)

    Mardare, Radu Iulian; Priami, Corrado; Qualia, Paola;

    2005-01-01

    Model checking biological systems described using ambient calculus. In Proc. of the second International Workshop on Computational Methods in Systems Biology (CMSB04), Lecture Notes in Bioinformatics 3082:85-103, Springer, 2005.......Model checking biological systems described using ambient calculus. In Proc. of the second International Workshop on Computational Methods in Systems Biology (CMSB04), Lecture Notes in Bioinformatics 3082:85-103, Springer, 2005....

  20. A Dynamical Mechanism for Large Volumes with Consistent Couplings

    CERN Document Server

    Abel, Steven

    2016-01-01

    A mechanism for addressing the 'decompactification problem' is proposed, which consists of balancing the vacuum energy in Scherk-Schwarzed theories against contributions coming from non- perturbative physics. Universality of threshold corrections ensures that, in such situations, the stable minimum will have consistent gauge couplings for any gauge group that shares the same N = 2 beta function for the bulk excitations as the gauge group that takes part in the minimisation. Scherk- Schwarz compactification from 6D to 4D in heterotic strings is discussed explicitly, together with two alternative possibilities for the non-perturbative physics, namely metastable SQCD vacua and a single gaugino condensate. In the former case, it is shown that modular symmetries gives various consistency checks, and allow one to follow soft-terms, playing a similar role to R-symmetry in global SQCD. The latter case is particularly attractive when there is nett Bose-Fermi degeneracy in the massless sector. In such cases, because th...

  1. A Consistent Semantics of Self-Adjusting Computation

    CERN Document Server

    Acar, Umut A; Donham, Jacob

    2011-01-01

    This paper presents a semantics of self-adjusting computation and proves that the semantics are correct and consistent. The semantics integrate change propagation with the classic idea of memoization to enable reuse of computations under mutation to memory. During evaluation, reuse of a computation via memoization triggers a change propagation that adjusts the reused computation to reflect the mutated memory. Since the semantics integrate memoization and change-propagation, it involves both non-determinism (due to memoization) and mutation (due to change propagation). Our consistency theorem states that the non-determinism is not harmful: any two evaluations of the same program starting at the same state yield the same result. Our correctness theorem states that mutation is not harmful: self-adjusting programs are consistent with purely functional programming. We formalize the semantics and their meta-theory in the LF logical framework and machine check our proofs using Twelf.

  2. Self-consistent triaxial models

    CERN Document Server

    Sanders, Jason L

    2015-01-01

    We present self-consistent triaxial stellar systems that have analytic distribution functions (DFs) expressed in terms of the actions. These provide triaxial density profiles with cores or cusps at the centre. They are the first self-consistent triaxial models with analytic DFs suitable for modelling giant ellipticals and dark haloes. Specifically, we study triaxial models that reproduce the Hernquist profile from Williams & Evans (2015), as well as flattened isochrones of the form proposed by Binney (2014). We explore the kinematics and orbital structure of these models in some detail. The models typically become more radially anisotropic on moving outwards, have velocity ellipsoids aligned in Cartesian coordinates in the centre and aligned in spherical polar coordinates in the outer parts. In projection, the ellipticity of the isophotes and the position angle of the major axis of our models generally changes with radius. So, a natural application is to elliptical galaxies that exhibit isophote twisting....

  3. Experimental and Analytical Study on the Lift Check Valve

    Energy Technology Data Exchange (ETDEWEB)

    Kim, J. H.; Song, C. S.; Kim, H. S.; Hong, S. C. [Korea Institute of Machinery and Materials, Daejeon (Korea, Republic of); Lee, W. H. [Samshin Limited Co., Chonan (Korea, Republic of)

    2009-10-15

    In general, the check valve mounted on the flow line is used for the purpose of protecting the pump and the related facility, making the flow path, and maintaining the pressure boundary during the operation mode change in steam power plant and nuclear power plant. Fig. 1 shows the example of check valve in nuclear power plant. Especially, the check valve mounted on safety feed system and nuclear safety system is operated to open state and has a role of acquiring enough fluid such as safety feed and auxiliary feed water in the Design Basis Accident. And the check valve is operated with enough sealing and with protecting steam hammer in normal operational mode. For this purpose, the check valve can be open easily and be maintained in the open state in case of small flow velocity. In this research, the experimental and analytical study on the check vale was performed. The flow coefficient and closure time were compared between the experimental and the analytical result by numerical simulation. The validation of the analytical method was performed.

  4. Strategy optimization for mask rule check in wafer fab

    Science.gov (United States)

    Yang, Chuen Huei; Lin, Shaina; Lin, Roger; Wang, Alice; Lee, Rachel; Deng, Erwin

    2015-07-01

    Photolithography process is getting more and more sophisticated for wafer production following Moore's law. Therefore, for wafer fab, consolidated and close cooperation with mask house is a key to achieve silicon wafer success. However, generally speaking, it is not easy to preserve such partnership because many engineering efforts and frequent communication are indispensable. The inattentive connection is obvious in mask rule check (MRC). Mask houses will do their own MRC at job deck stage, but the checking is only for identification of mask process limitation including writing, etching, inspection, metrology, etc. No further checking in terms of wafer process concerned mask data errors will be implemented after data files of whole mask are composed in mask house. There are still many potential data errors even post-OPC verification has been done for main circuits. What mentioned here are the kinds of errors which will only occur as main circuits combined with frame and dummy patterns to form whole reticle. Therefore, strategy optimization is on-going in UMC to evaluate MRC especially for wafer fab concerned errors. The prerequisite is that no impact on mask delivery cycle time even adding this extra checking. A full-mask checking based on job deck in gds or oasis format is necessary in order to secure acceptable run time. Form of the summarized error report generated by this checking is also crucial because user friendly interface will shorten engineers' judgment time to release mask for writing. This paper will survey the key factors of MRC in wafer fab.

  5. Automated survey of 8000 plan checks at eight facilities.

    Science.gov (United States)

    Halabi, Tarek; Lu, Hsiao-Ming; Bernard, Damian A; Chu, James C H; Kirk, Michael C; Hamilton, Russell J; Lei, Yu; Driewer, Joseph

    2016-09-01

    To identify policy and system related weaknesses in treatment planning and plan check work-flows. The authors' web deployed plan check automation solution, PlanCheck, which works with all major planning and record and verify systems (demonstrated here for mosaiq only), allows them to compute violation rates for a large number of plan checks across many facilities without requiring the manual data entry involved with incident filings. Workflows and failure modes are heavily influenced by the type of record and verify system used. Rather than tackle multiple record and verify systems at once, the authors restricted the present survey to mosaiq facilities. Violations were investigated by sending inquiries to physicists running the program. Frequent violations included inadequate tracking in the record and verify system of total and prescription doses. Infrequent violations included incorrect setting of patient orientation in the record and verify system. Peaks in the distribution, over facilities, of violation frequencies pointed to suboptimal policies at some of these facilities. Correspondence with physicists often revealed incomplete knowledge of settings at their facility necessary to perform thorough plan checks. The survey leads to the identification of specific and important policy and system deficiencies that include: suboptimal timing of initial plan checks, lack of communication or agreement on conventions surrounding prescription definitions, and lack of automation in the transfer of some parameters.

  6. Improved Bounded Model Checking for the Universal Fragment of CTL

    Institute of Scientific and Technical Information of China (English)

    Liang Xu; Wei Chen; Yan-Yan Xu; Wen-Hui Zhang

    2009-01-01

    SAT-based bounded model checking (BMC) has been introduced as a complementary technique to BDD-based symbolic model checking in recent years, and a lot of successful work has been done in this direction. The approach was first introduced by A. Biere et al. in checking linear temporal logic (LTL) formulae and then also adapted to check formulae of the universal fragment of computation tree logic (ACTL) by W. Penczek et al. As the efficiency of model checking is still an important issue, we present an improved BMC approach for ACTL based on Penczek's method. We consider two aspects of the approach. One is reduction of the number of variables and transitions in the k-model by distinguishing the temporal operator EX from the others. The other is simplification of the transformation of formulae by using uniform path encoding instead of a disjunction of all paths needed in the k-model. With these improvements, for an ACTI, formula, the length of the final encoding of the formula in the worst case is reduced. The improved approach is implemented in the tool BMV and is compared with the original one by applying both to two well known examples, mutual exclusion and dining philosophers. The comparison shows the advantages of the improved approach with respect to the efficiency of model checking.

  7. On Modal Refinement and Consistency

    DEFF Research Database (Denmark)

    Nyman, Ulrik; Larsen, Kim Guldstrand; Wasowski, Andrzej

    2007-01-01

    Almost 20 years after the original conception, we revisit several fundamental question about modal transition systems. First, we demonstrate the incompleteness of the standard modal refinement using a counterexample due to Hüttel. Deciding any refinement, complete with respect to the standard...... notions of implementation, is shown to be computationally hard (co-NP hard). Second, we consider four forms of consistency (existence of implementations) for modal specifications. We characterize each operationally, giving algorithms for deciding, and for synthesizing implementations, together...

  8. Tri-Sasakian consistent reduction

    CERN Document Server

    Cassani, Davide

    2011-01-01

    We establish a universal consistent Kaluza-Klein truncation of M-theory based on seven-dimensional tri-Sasakian structure. The four-dimensional truncated theory is an N=4 gauged supergravity with three vector multiplets and a non-abelian gauge group, containing the compact factor SO(3). Consistency follows from the fact that our truncation takes exactly the same form as a left-invariant reduction on a specific coset manifold, and we show that the same holds for the various universal consistent truncations recently put forward in the literature. We describe how the global symmetry group SL(2,R) x SO(6,3) is embedded in the symmetry group E7(7) of maximally supersymmetric reductions, and make the connection with the approach of Exceptional Generalized Geometry. Vacuum AdS4 solutions spontaneously break the amount of supersymmetry from N=4 to N=3,1 or 0, and the spectrum contains massive modes. We find a subtruncation to minimal N=3 gauged supergravity as well as an N=1 subtruncation to the SO(3)-invariant secto...

  9. Improving the efficiency of weigh in motion systems through optimized allocating truck checking oriented procedure

    Directory of Open Access Journals (Sweden)

    Abbas Mahmoudabadi

    2013-03-01

    Full Text Available In the present paper, an effective procedure is proposed to determine the best location(s for installing Weigh in Motion systems (WIM. The main objective is to determine locations for best performance, defined as the maximum number of once-checked trucks' axle loads and minimizing unnecessary actions. The aforesaid method consists of two main stages, including solving shortest path algorithm and selecting the best location for installing WIM(s. A proper mathematical model has also been developed to achieve objective function. The number of once-checked trucks, unnecessary actions and average installing costs are defined as criteria measures. The proposed procedure was applied in a road network using experimental data, while the results were compared with the usual methods of locating enforcement facilities. Finally, it is concluded that the proposed procedure seems to be more efficient than the traditional methods and local experts' points of view.

  10. Model Checking for a General Linear Model with Nonignorable Missing Covariates

    Institute of Scientific and Technical Information of China (English)

    Zhi-hua SUN; Wai-Cheung IP; Heung WONG

    2012-01-01

    In this paper,we investigate the model checking problem for a general linear model with nonignorable missing covariates.We show that,without any parametric model assumption for the response probability,the least squares method yields consistent estimators for the linear model even if only the complete data are applied.This makes it feasible to propose two testing procedures for the corresponding model checking problem:a score type lack-of-fit test and a test based on the empirical process.The asymptotic properties of the test statistics are investigated.Both tests are shown to have asymptotic power 1 for local alternatives converging to the null at the rate n-(r),0 ≤ (r) < 1/2.Simulation results show that both tests perform satisfactorily.

  11. Electronic mail dysfunction: a reality check.

    Science.gov (United States)

    Case, C J

    1999-01-01

    Computer-mediated communication systems, including electronic mail, are systems that businesses employ to improve efficiency, effectiveness, and communication within the organization. As use of these systems proliferate, it is crucial that the communication systems have a positive, rather than negative impact, on the organization. Negative behavior could include flaming and personal use of the electronic mail system. Much of prior research has examined the use of electronic mail in academic settings. Results indicate that flaming and personal use have a relative high incidence. However, is electronic mail dysfunction a consistent reality for both academia and the business world? This case study empirically examines the role of electronic messaging in business firms. Specifically, this research investigates the usage of inter-organizational electronic messaging in intermediate-size firms. Electronic mail messages were analyzed in a three-site case study. Results indicate that dysfunctional electronic mail uses such as personal use and flaming have minimal incidence in a business environment. Implications relate to organizational professionalism and the use of students as electronic mail research subjects.

  12. On the consistency of MPS

    CERN Document Server

    Souto-Iglesias, Antonio; González, Leo M; Cercos-Pita, Jose L

    2013-01-01

    The consistency of Moving Particle Semi-implicit (MPS) method in reproducing the gradient, divergence and Laplacian differential operators is discussed in the present paper. Its relation to the Smoothed Particle Hydrodynamics (SPH) method is rigorously established. The application of the MPS method to solve the Navier-Stokes equations using a fractional step approach is treated, unveiling inconsistency problems when solving the Poisson equation for the pressure. A new corrected MPS method incorporating boundary terms is proposed. Applications to one dimensional boundary value Dirichlet and mixed Neumann-Dirichlet problems and to two-dimensional free-surface flows are presented.

  13. Measuring process and knowledge consistency

    DEFF Research Database (Denmark)

    Edwards, Kasper; Jensen, Klaes Ladeby; Haug, Anders

    2007-01-01

    with a 5 point Liker scale and a corresponding scoring system. Process consistency is measured by using a first-person drawing tool with the respondent in the centre. Respondents sketch the sequence of steps and people they contact when configuring a product. The methodology is tested in one company...... for granted; rather the contrary, and attempting to implement a configuration system may easily ignite a political battle. This is because stakes are high in the sense that the rules and processes chosen may only reflect one part of the practice, ignoring a majority of the employees. To avoid this situation...

  14. Maintaining consistency in distributed systems

    Science.gov (United States)

    Birman, Kenneth P.

    1991-01-01

    In systems designed as assemblies of independently developed components, concurrent access to data or data structures normally arises within individual programs, and is controlled using mutual exclusion constructs, such as semaphores and monitors. Where data is persistent and/or sets of operation are related to one another, transactions or linearizability may be more appropriate. Systems that incorporate cooperative styles of distributed execution often replicate or distribute data within groups of components. In these cases, group oriented consistency properties must be maintained, and tools based on the virtual synchrony execution model greatly simplify the task confronting an application developer. All three styles of distributed computing are likely to be seen in future systems - often, within the same application. This leads us to propose an integrated approach that permits applications that use virtual synchrony with concurrent objects that respect a linearizability constraint, and vice versa. Transactional subsystems are treated as a special case of linearizability.

  15. COMMON AGRICULTURAL POLICY FROM HEALTH CHECK DECISIONS TO THE POST-2013 REFORM

    Directory of Open Access Journals (Sweden)

    Niculescu Oana Marilena

    2011-07-01

    Full Text Available The paper proposed for being presented belongs to the field research International Affairs and European Integration. The paper entitled Common Agricultural Policy from Health Check decisions to the post-2013 reform aims to analyze the Common Agricultural Policy (CAP from the Health Check adoption in November 2008 to a new reform post-2013. The objectives of the paper are the presentation of the Health Check with its advantages and disadvantages as well as the analysis of the opportunity of a new European policy and its reforming having in view that the analysis of Health Check condition was considered a compromise. The paper is related to the internal and international research consisting in several books, studies, documents that analyze the particularities of the most debated, controversial and reformed EU policy. A personal study is represented by the first report within the PhD paper called The reform of CAP and its implications for Romanias agriculture(coordinator prof. Gheorghe Hurduzeu PhD, Academy of Economic Studies Bucharest, Faculty of International Business, research studies in the period 2009-2012. The research methodology used consists in collecting and analysis data from national and international publications, their validation, followed by a dissemination of the results in order to express a personal opinion regarding CAP and its reform. The results of the research consist in proving the opportunity of a new reform due to the fact that Health Check belongs already to the past. The paper belongs to the field research mentioned, in the attempt to prove the opportunity of building a new EU agricultural policy. The challenges CAP is facing are: food safety, environmental and climate changes, territorial balance as well as new challenges-improving sustainable management of natural resources, maintaining competitiveness in the context of globalization growth, strengthening EU cohesion in rural areas, increasing the support of CAP for

  16. Deployment of check-in nodes in complex networks

    Science.gov (United States)

    Jiang, Zhong-Yuan; Ma, Jian-Feng

    2017-01-01

    In many real complex networks such as the city road networks and highway networks, vehicles often have to pass through some specially functioned nodes to receive check-in like services such as gas supplement at gas stations. Based on existing network structures, to guarantee every shortest path including at least a check-in node, the location selection of all check-in nodes is very essential and important to make vehicles to easily visit these check-in nodes, and it is still remains an open problem in complex network studies. In this work, we aim to find possible solutions for this problem. We first convert it into a set cover problem which is NP-complete and propose to employ the greedy algorithm to achieve an approximate result. Inspired by heuristic information of network structure, we discuss other four check-in node location deployment methods including high betweenness first (HBF), high degree first (HDF), random and low degree first (LDF). Finally, we compose extensive simulations in classical scale-free networks, random networks and real network models, and the results can well confirm the effectiveness of the greedy algorithm. This work has potential applications into many real networks.

  17. Intelligent Data Visualization for Cross-Checking Spacecraft System Diagnosis

    Science.gov (United States)

    Ong, James C.; Remolina, Emilio; Breeden, David; Stroozas, Brett A.; Mohammed, John L.

    2012-01-01

    Any reasoning system is fallible, so crew members and flight controllers must be able to cross-check automated diagnoses of spacecraft or habitat problems by considering alternate diagnoses and analyzing related evidence. Cross-checking improves diagnostic accuracy because people can apply information processing heuristics, pattern recognition techniques, and reasoning methods that the automated diagnostic system may not possess. Over time, cross-checking also enables crew members to become comfortable with how the diagnostic reasoning system performs, so the system can earn the crew s trust. We developed intelligent data visualization software that helps users cross-check automated diagnoses of system faults more effectively. The user interface displays scrollable arrays of timelines and time-series graphs, which are tightly integrated with an interactive, color-coded system schematic to show important spatial-temporal data patterns. Signal processing and rule-based diagnostic reasoning automatically identify alternate hypotheses and data patterns that support or rebut the original and alternate diagnoses. A color-coded matrix display summarizes the supporting or rebutting evidence for each diagnosis, and a drill-down capability enables crew members to quickly view graphs and timelines of the underlying data. This system demonstrates that modest amounts of diagnostic reasoning, combined with interactive, information-dense data visualizations, can accelerate system diagnosis and cross-checking.

  18. The use of check valve performance data to support new concepts (probabilistic risk assessment, condition monitoring) for check valve program

    Energy Technology Data Exchange (ETDEWEB)

    Hart, K.A.; Gower, D.

    1996-12-01

    The concept of developing an integrated check valve database based on the Nuclear Power Reliability Data System (NPRDS) data was presented at the last Symposium. The Nuclear Industry Check Valve Group (NIC), working in cooperation with the Oak Ridge National Laboratory (ORNL), has completed an operational database of check valve performance from 1984 to the present. NIC has committed to the nuclear industry to periodically update the data and maintain this information accessible. As the new concepts of probabilistic risk analysis and condition monitoring are integrated into the American Society of Mechanical Engineers (ASME) Code, a critical element will be performance data. From check valve performance data, feasible failure modes and rates can be established. When a failure rate or frequency of failures can be established based on a significant enough population (sampling), a more solid foundation for focusing resources and determining appropriate frequencies and testing can be determined. The presentation will give the updated status of the NIC Check Valve Performance Database covering (1) methodology used to combine the original ORNL data; (2) process/controls established for continuing update and refinement of the data; (3) discussion of how this data is being utilized by (a) OM-22 for condition monitoring, and (b) risk-based inservice testing work of Westinghouse Owners` Group; and (4) results/trends of data evaluations. At the 1994 Symposium, ORNL provided an update as of 1991 to their original work of 1984 -1990 which they had performed to characterize check valve degradations and failures in the nuclear industry. These characterizations will be updated to 1995 and additional reviews provided to give insight into the current condition and trends of check valve performance.

  19. Testing an assumption of the E-Z Reader model of eye-movement control during reading: using event-related potentials to examine the familiarity check.

    Science.gov (United States)

    Reichle, Erik D; Tokowicz, Natasha; Liu, Ying; Perfetti, Charles A

    2011-07-01

    According to the E-Z Reader model of eye-movement control, the completion of an early stage of lexical processing, the familiarity check, causes the eyes to move forward during reading (Reichle, Pollatsek, Fisher, & Rayner, 1998). Here, we report an event-related potential (ERP) experiment designed to examine the hypothesized familiarity check at the electrophysiological level. The results indicate ERP components modulated by word frequency at the time of the predicted familiarity check. These findings are consistent with the hypothesis that an early stage of lexical processing is linked to the "decisions" about when to move the eyes during reading. Copyright © 2011 Society for Psychophysiological Research.

  20. Higher Data Quality by Online Data-Entry and Automated Plausibility Checks

    Science.gov (United States)

    Pietragalla, Barbara; Sigg, Christian; Güsewell, Sabine; Clot, Bernard

    2014-05-01

    Long-term phenological observations are now recognized as important indicators for climate change impact studies. With the increased need for phenological data, there is also an increased need for higher data quality. Since 1951 MeteoSwiss has been operating a national phenological observation network. Currently the network consists of about 150 active stations observing up to 69 different phenophases. An important aim of a running three years project at MeteoSwiss is a further increase of the quality of the collected data. The higher data quality will be achieved by an automated procedure performing plausibility checks on the data and by online data-entry. Further measures such as intensified observer instructions and collection of more detailed metadata also contribute to a high data quality standard. The plausibility checks include the natural order of the phenophases within a species and also between different species (with regard to possible natural deviation). Additionally it will be checked if the observed date differs by less than two standard deviations from the average for this phenophase at the altitude of the station. A value outside of these limits is not necessarily a false value, since occurrences of extreme values will be beyond these limits. Therefore, within this check of the limits, the timing of the season of the respective year will also be taken into account. In case of an implausible value a comparison with other stations of the same region and sea level is proposed. A further possibility of data quality control could be to model the different phenophases statistically and to use this model for estimating the likelihood of observed values. An overall exploratory data analysis is currently performed providing a solid basis to implement the best possible methods for the plausibility checks. Important advantages of online data-entry are the near real-time availability of the data as well as the avoidance of various kinds of typical mistakes

  1. Decentralized Consistent Updates in SDN

    KAUST Repository

    Nguyen, Thanh Dang

    2017-04-10

    We present ez-Segway, a decentralized mechanism to consistently and quickly update the network state while preventing forwarding anomalies (loops and blackholes) and avoiding link congestion. In our design, the centralized SDN controller only pre-computes information needed by the switches during the update execution. This information is distributed to the switches, which use partial knowledge and direct message passing to efficiently realize the update. This separation of concerns has the key benefit of improving update performance as the communication and computation bottlenecks at the controller are removed. Our evaluations via network emulations and large-scale simulations demonstrate the efficiency of ez-Segway, which compared to a centralized approach, improves network update times by up to 45% and 57% at the median and the 99th percentile, respectively. A deployment of a system prototype in a real OpenFlow switch and an implementation in P4 demonstrate the feasibility and low overhead of implementing simple network update functionality within switches.

  2. The Consistent Vehicle Routing Problem

    Energy Technology Data Exchange (ETDEWEB)

    Groer, Christopher S [ORNL; Golden, Bruce [University of Maryland; Edward, Wasil [American University

    2009-01-01

    In the small package shipping industry (as in other industries), companies try to differentiate themselves by providing high levels of customer service. This can be accomplished in several ways, including online tracking of packages, ensuring on-time delivery, and offering residential pickups. Some companies want their drivers to develop relationships with customers on a route and have the same drivers visit the same customers at roughly the same time on each day that the customers need service. These service requirements, together with traditional constraints on vehicle capacity and route length, define a variant of the classical capacitated vehicle routing problem, which we call the consistent VRP (ConVRP). In this paper, we formulate the problem as a mixed-integer program and develop an algorithm to solve the ConVRP that is based on the record-to-record travel algorithm. We compare the performance of our algorithm to the optimal mixed-integer program solutions for a set of small problems and then apply our algorithm to five simulated data sets with 1,000 customers and a real-world data set with more than 3,700 customers. We provide a technique for generating ConVRP benchmark problems from vehicle routing problem instances given in the literature and provide our solutions to these instances. The solutions produced by our algorithm on all problems do a very good job of meeting customer service objectives with routes that have a low total travel time.

  3. A Spatialization-based Method for Checking and Updating Metadata

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    In this paper the application of spatialization technology on metadata quality check and updating was discussed. A new method based on spatialization was proposed for checking and updating metadata to overcome the deficiency of text based methods with the powerful functions of spatial query and analysis provided by GIS software. This method employs the technology of spatialization to transform metadata into a coordinate space and the functions of spatial analysis in GIS to check and update spatial metadata in a visual environment. The basic principle and technical flow of this method were explained in detail, and an example of implementation using ArcMap of GIS software was illustrated with a metadata set of digital raster maps. The result shows the new method with the support of interaction of graph and text is much more intuitive and convenient than the ordinary text based method, and can fully utilize the functions of GIS spatial query and analysis with more accuracy and efficiency.

  4. Model Checking-Based Testing of Web Applications

    Institute of Scientific and Technical Information of China (English)

    ZENG Hongwei; MIAO Huaikou

    2007-01-01

    A formal model representing the navigation behavior of a Web application as the Kripke structure is proposed and an approach that applies model checking to test case generation is presented. The Object Relation Diagram as the object model is employed to describe the object structure of a Web application design and can be translated into the behavior model. A key problem of model checking-based test generation for a Web application is how to construct a set of trap properties that intend to cause the violations of model checking against the behavior model and output of counterexamples used to construct the test sequences.We give an algorithm that derives trap properties from the object model with respect to node and edge coverage criteria.

  5. Field trials of the Baby Check score card in hospital.

    Science.gov (United States)

    Thornton, A J; Morley, C J; Cole, T J; Green, S J; Walker, K A; Rennie, J M

    1991-01-01

    The Baby Check score card was used by junior paediatric doctors to assess 262 babies under 6 months old presenting to hospital. The duty registrar and two consultants independently graded the severity of each baby's illness without knowledge of the Baby Check score. The registrars assessed the babies at presentation while the consultants reviewed the notes. The consultants and registrars agreed about the need for hospital admission only about 75% of the time. The score's sensitivity and predictive values were similar to those of the registrars' grading. The score's specificity was 87%. Babies with serious diagnosis scored high, while minor illnesses scored low. The predictive value for requiring hospital admission increased with the score, rising to 100% for scores of 20 or more. The appropriate use of Baby Check should improve the detection of serious illness. It could also reduce the number of babies admitted with minor illness, without putting them at increased risk.

  6. Effects of monetary reward and punishment on information checking behaviour.

    Science.gov (United States)

    Li, Simon Y W; Cox, Anna L; Or, Calvin; Blandford, Ann

    2016-03-01

    Two experiments were conducted to examine whether checking one's own work can be motivated by monetary reward and punishment. Participants were randomly assigned to one of three conditions: a flat-rate payment for completing the task (Control); payment increased for error-free performance (Reward); payment decreased for error performance (Punishment). Experiment 1 (N = 90) was conducted with liberal arts students, using a general data-entry task. Experiment 2 (N = 90) replicated Experiment 1 with clinical students and a safety-critical 'cover story' for the task. In both studies, Reward and Punishment resulted in significantly fewer errors, more frequent and longer checking, than Control. No such differences were obtained between the Reward and Punishment conditions. It is concluded that error consequences in terms of monetary reward and punishment can result in more accurate task performance and more rigorous checking behaviour than errors without consequences. However, whether punishment is more effective than reward, or vice versa, remains inconclusive.

  7. CheckMATE 2: From the model to the limit

    CERN Document Server

    Dercks, Daniel; Kim, Jong Soo; Rolbiecki, Krzysztof; Tattersall, Jamie; Weber, Torsten

    2016-01-01

    We present the latest developments to the CheckMATE program that allows models of new physics to be easily tested against the recent LHC data. To achieve this goal, the core of CheckMATE now contains over 60 LHC analyses of which 12 are from the 13 TeV run. The main new feature is that CheckMATE 2 now integrates the Monte Carlo event generation via Madgraph and Pythia 8. This allows users to go directly from a SLHA file or UFO model to the result of whether a model is allowed or not. In addition, the integration of the event generation leads to a significant increase in the speed of the program. Many other improvements have also been made, including the possibility to now combine signal regions to give a total likelihood for a model.

  8. Schedulability of Herschel revisited using statistical model checking

    DEFF Research Database (Denmark)

    David, Alexandre; Larsen, Kim Guldstrand; Legay, Axel

    2015-01-01

    Schedulability analysis is a main concern for several embedded applications due to their safety-critical nature. The classical method of response time analysis provides an efficient technique used in industrial practice. However, the method is based on conservative assumptions related to execution...... to obtain some guarantee on the (un)schedulability of the model even in the presence of undecidability. Two methods are considered: symbolic model checking and statistical model checking. Since the model uses stop-watches, the reachability problem becomes undecidable so we are using an over......-approximation technique. We can safely conclude that the system is schedulable for varying values of BCET. For the cases where deadlines are violated, we use polyhedra to try to confirm the witnesses. Our alternative method to confirm non-schedulability uses statistical model-checking (SMC) to generate counter...

  9. Model checking software for phylogenetic trees using distribution and database methods.

    Science.gov (United States)

    Requeno, José Ignacio; Colom, José Manuel

    2013-11-14

    Model checking, a generic and formal paradigm stemming from computer science based on temporal logics, has been proposed for the study of biological properties that emerge from the labeling of the states defined over the phylogenetic tree. This strategy allows us to use generic software tools already present in the industry. However, the performance of traditional model checking is penalized when scaling the system for large phylogenies. To this end, two strategies are presented here. The first one consists of partitioning the phylogenetic tree into a set of subgraphs each one representing a subproblem to be verified so as to speed up the computation time and distribute the memory consumption. The second strategy is based on uncoupling the information associated to each state of the phylogenetic tree (mainly, the DNA sequence) and exporting it to an external tool for the management of large information systems. The integration of all these approaches outperforms the results of monolithic model checking and helps us to execute the verification of properties in a real phylogenetic tree.

  10. [Validation of a German-language Version of the Body Checking Questionnaire (BCQ) in Adolescents with Anorexia and Bulimia Nervosa].

    Science.gov (United States)

    Steinfeld, Beate; Bauer, Anika; Waldorf, Manuel; Engel, Nicole; Braks, Karsten; Huber, Thomas J; Vocks, Silja

    2017-01-01

    Body-related checking behavior, as a behavioral manifestation of a disturbed body image, fosters the development and maintenance of eating disorders. The Body Checking Questionnaire (BCQ) is the most commonly used questionnaire for measuring body-related checking behavior internationally. To date, validation studies are only available for adult populations. Therefore, the aim of this study was to statistically test the German-language version of the BCQ in adolescents. A total of N=129 female adolescents were examined, comprising n=57 with Anorexia Nervosa, n=24 with Bulimia Nervosa, and n=48 healthy female adolescents. A confirmatory factor analysis supports the subdivision of the BCQ into a general factor and the subfactors "overall appearance", "specific body parts" and "idiosyncratic checking", which was also found in the original version. The internal consistencies are good (α≥0.81), and the BCQ is able to differentiate well between adolescents with and without eating disorders. Significant correlations between the BCQ and other body image questionnaires point to a good convergent validity. The German-language BCQ thus constitutes a valid and reliable instrument for measuring body-related checking behavior among adolescents in clinical research and practice. © Georg Thieme Verlag KG Stuttgart · New York.

  11. Forgetting what you have checked: a link between working memory impairment and checking behaviors in obsessive-compulsive disorder.

    Science.gov (United States)

    Jaafari, N; Frasca, M; Rigalleau, F; Rachid, F; Gil, R; Olié, J-P; Guehl, D; Burbaud, P; Aouizerate, B; Rotgé, J-Y; Vibert, N

    2013-02-01

    Compulsive checking behaviors are common in obsessive-compulsive disorder (OCD). Several authors have suggested that these checking rituals could be related to memory deficits. Our aim was to test whether patients with OCD show working memory impairment in relation to their checking behavior. We evaluated the verbal and visuospatial components of patients' and controls' working memory using the reading span and backward location span tests. Checking behaviors were measured by recording participants' eye movements during an image comparison task using a non-invasive, infra-red TOBII 1750 eyetracker. Participants were seated, head-free, in a natural position in front of the eyetracker screen where the images were displayed. Patients with OCD made more gaze moves to compare images than controls. Both patients' working memory spans were reduced, and the patients' deficit in the comparison task was negatively related to their working memory spans. This work demonstrates that checking behavior in OCD is linked to a general reduction of the patients' verbal and visuospatial working memory span. Copyright © 2011 Elsevier Masson SAS. All rights reserved.

  12. Error Checking for Chinese Query by Mining Web Log

    Directory of Open Access Journals (Sweden)

    Jianyong Duan

    2015-01-01

    Full Text Available For the search engine, error-input query is a common phenomenon. This paper uses web log as the training set for the query error checking. Through the n-gram language model that is trained by web log, the queries are analyzed and checked. Some features including query words and their number are introduced into the model. At the same time data smoothing algorithm is used to solve data sparseness problem. It will improve the overall accuracy of the n-gram model. The experimental results show that it is effective.

  13. The Complexity of Model Checking Higher-Order Fixpoint Logic

    DEFF Research Database (Denmark)

    Axelsson, Roland; Lange, Martin; Somla, Rafal

    2007-01-01

    of solving rather large parity games of small index. As a consequence of this we obtain an ExpTime upper bound on the expression complexity of each HFLk,m. The lower bound is established by a reduction from the word problem for alternating (k-1)-fold exponential space bounded Turing Machines. As a corollary...... provides complexity results for its model checking problem. In particular we consider its fragments HFLk,m which are formed using types of bounded order k and arity m only. We establish k-ExpTime-completeness for model checking each HFLk,m fragment. For the upper bound we reduce the problem to the problem...

  14. Model Checking Event-B by Encoding into Alloy

    CERN Document Server

    Matos, Paulo J

    2008-01-01

    As systems become ever more complex, verification becomes more main stream. Event-B and Alloy are two formal specification languages based on fairly different methodologies. While Event-B uses theorem provers to prove that invariants hold for a given specification, Alloy uses a SAT-based model finder. In some settings, Event-B invariants may not be proved automatically, and so the often difficult step of interactive proof is required. One solution for this problem is to validate invariants with model checking. This work studies the encoding of Event-B machines and contexts to Alloy in order to perform temporal model checking with Alloy's SAT-based engine.

  15. The check and error analysis of the BRDF experiment bench

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    In this paper, a detailed introduction is given to the check method of the BRDF experiment bench which is built on our own. Measurement is made on the BRDF of the standard white plate made of polytetrafluoroethylene(PTFE) with reference to the existing standard white plate whose surface reflectance is known and by the method of theory approximate and relative comparison. On the basis of that, the BRDF value of the standard white plate in the wave band of 0. 6328 μm is given and the experiment bench is checked, the relative error of the experiment bench being within 20%.

  16. Optimisation of BPMN Business Models via Model Checking

    DEFF Research Database (Denmark)

    Herbert, Luke Thomas; Sharp, Robin

    2013-01-01

    We present a framework for the optimisation of business processes modelled in the business process modelling language BPMN, which builds upon earlier work, where we developed a model checking based method for the analysis of BPMN models. We define a structure for expressing optimisation goals...... candidate improved processes based on the fittest of the previous generation. The evaluation of the fitness of each candidate in a generation is performed via model checking, detailed in previous work. At each iteration, this allows the determination of the precise numerical evaluation of the performance...

  17. Graph-tree-based software control flow checking for COTS processors on pico-satellites

    Institute of Scientific and Technical Information of China (English)

    Yang Mu; Wang Hao; Zheng Yangming; Jin Zhonghe

    2013-01-01

    This paper proposes a generic high-performance and low-time-overhead software control flow checking solution,graph-tree-based control flow checking (GTCFC) for space-borne commercial-off-the-shelf (COTS) processors.A graph tree data structure with a topology similar to common trees is introduced to transform the control flow graphs of target programs.This together with design of IDs and signatures of its vertices and edges allows for an easy check of legality of actual branching during target program execution.As a result,the algorithm not only is capable of detecting all single and multiple branching errors with low latency and time overheads along with a linear-complexity space overhead,but also remains generic among arbitrary instruction sets and independent of any specific hardware.Tests of the algorithm using a COTS-processor-based on-board computer (OBC) of in-service ZDPS-1A pico-satellite products show that GTCFC can detect over 90% of the randomly injected and all-pattern-covering branching errors for different types of target programs,with performance and overheads consistent with the theoretical analysis; and beats well-established preeminent control flow checking algorithms in these dimensions.Furthermore,it is validated that GTCGC not only can be accommodated in pico-satellites conveniently with still sufficient system margins left,but also has the ability to minimize the risk of control flow errors being undetected in their space missions.Therefore,due to its effectiveness,efficiency,and compatibility,the GTCFC solution is ready for applications on COTS processors on pico-satellites in their real space missions.

  18. Model checking: one can do much more than you think!

    NARCIS (Netherlands)

    Katoen, Joost P.

    2012-01-01

    Model checking is an automated verification technique that actively is applied to find bugs in hardware and software designs. Companies like IBM and Cadence developed their in-house model checkers, and acted as driving forces behind the design of the IEEE-standardized temporal logic PSL. On the othe

  19. Feasibility Checking for Dial-a-Ride Problems

    DEFF Research Database (Denmark)

    Haugland, Dag; Ho, Sin C.

    Hunsaker and Savelsbergh have proposed an algorithm for testing feasibility of a route in the solution to the dial-a-ride problem. The constraints that are checked are load capacity constraints, time windows, ride time bounds and wait time bounds. The algorithm has linear running time. By virtue...

  20. Level of agency in sub-clinical checking.

    Science.gov (United States)

    Belayachi, S; Van der Linden, M

    2009-03-01

    This study examined cognitive representations of routine action, through the assessment of level of agency, in individuals with sub-clinical checking. The level of agency stems from Action Identification Theory [Vallacher, R. R., Wegner, D. M. (1989). Levels of personal agency: Individual variation in action identification. Journal of Personality and Social Psychology 57, 660-671], which states that how actions are usually identified (based on instrumental aspects or purpose) reflects the predominant accessibility of internal representation (movements executed vs. goal pursued). Furthermore, this framework proposed that altered action regulation is related to low-level of agency (i.e., action identification at an instrumental level). In the current study, the main result indicated that checking symptoms were related to a low-level of agency, that is, individuals with sub-clinical checking identified habitual actions on the basis of instrumental aspects. This seems to indicate that checkers may act with a lack of goal representations. The results are discussed in terms of the role of low-level of agency in checking phenomena and related cognitive dysfunction.

  1. Interactive comparison of hypothesis tests for statistical model checking

    NARCIS (Netherlands)

    de Boer, Pieter-Tjerk; Reijsbergen, D.P.; Scheinhardt, Willem R.W.

    2015-01-01

    We present a web-based interactive comparison of hypothesis tests as are used in statistical model checking, providing users and tool developers with more insight into their characteristics. Parameters can be modified easily and their influence is visualized in real time; an integrated simulation

  2. Efficient Integrity Checking for Databases with Recursive Views

    DEFF Research Database (Denmark)

    Martinenghi, Davide; Christiansen, Henning

    2005-01-01

    into incremental and optimized tests specialized for given update patterns. These tests may involve the introduction of new views, but for relevant cases of recursion, simplified integrity constraints are obtained that can be checked more efficiently than the original ones and without auxiliary views. Notably...

  3. Preservation Health Check: Monitoring Threats to Digital Repository Content

    Science.gov (United States)

    Kool, Wouter; van der Werf, Titia; Lavoie, Brian

    2014-01-01

    The Preservation Health Check (PHC) project, undertaken as a joint effort by Open Planets Foundation (OPF) and OCLC Research, aims to evaluate the usefulness of the preservation metadata created and maintained by operational repositories for assessing basic preservation properties. The PHC project seeks to develop an implementable logic to support…

  4. Applied Bounded Model Checking for Interlocking System Designs

    DEFF Research Database (Denmark)

    Haxthausen, Anne Elisabeth; Peleska, Jan; Pinger, Ralf

    2014-01-01

    of behavioural (operational) semantics. The former checks that the plant model – that is, the software components reflecting the physical components of the interlocking system – has been set up in an adequate way. The latter investigates trains moving through the network, with the objective to uncover potential...

  5. Multi-core and/or symbolic model checking

    NARCIS (Netherlands)

    Dijk, van Tom; Laarman, Alfons; Pol, van de Jaco; Luettgen, G.; Merz, S.

    2012-01-01

    We review our progress in high-performance model checking. Our multi-core model checker is based on a scalable hash-table design and parallel random-walk traversal. Our symbolic model checker is based on Multiway Decision Diagrams and the saturation strategy. The LTSmin tool is based on the PINS arc

  6. Remedial Sheets for Progress Checks, Segments 1-14.

    Science.gov (United States)

    New York Inst. of Tech., Old Westbury.

    The first part of the Self-Paced Physics Course remediation materials is presented for U. S. Naval Academy students who miss core problems on the progress check. The total of 78 problems is incorporated in this volume to match study segments 1 through 14. Each remedial sheet is composed of a statement of the missed problem and references to…

  7. Check list of European hymenomycetous Heterobasidiae. Supplement and corrections

    NARCIS (Netherlands)

    Donk, M.A.

    1974-01-01

    This continuation of the “Check list of European hymenomycetous Heterobasidiae” (published in Persoonia 4: 145-335. 1966) contains supplementary matter as well as corrections. — Ypsilonidium (Donk) Donk is published as a new genus. Two new specific combinations are made with this generic name. — Mur

  8. A Check List for Evaluating Persuasive Features of Mathematics Courseware

    Science.gov (United States)

    Aris, Baharuddin; Gharbaghi, Alireza; Ahmad, Maizah Hura; Rosli, Mohd Shafie

    2013-01-01

    The main purpose of this study is to introduce a check list for evaluating persuasive features of mathematics courseware. Since mathematics is a source of anxiety among students (Zeidner & Matthews, 2010), this research is an attempt to employ persuasive features that can be used in mathematics courseware. Specifically, we sought to determine…

  9. Check list of the helminths of equines in Turkey.

    Science.gov (United States)

    Gürler, Ali Tümay; Bölükbaş, Cenk Soner; Açici, Mustafa; Umur, Sinasi

    2010-01-01

    Helminths of equines are one of the most important agents of parasitic diseases. Therefore, many studies have been conducted on helminths of equines in Turkey. In this article, a check list and prevalence rates of helminths of equines in Turkey have been given.

  10. Mandatory Identification Bar Checks: How Bouncers Are Doing Their Job

    Science.gov (United States)

    Monk-Turner, Elizabeth; Allen, John; Casten, John; Cowling, Catherine; Gray, Charles; Guhr, David; Hoofnagle, Kara; Huffman, Jessica; Mina, Moises; Moore, Brian

    2011-01-01

    The behavior of bouncers at on site establishments that served alcohol was observed. Our aim was to better understand how bouncers went about their job when the bar had a mandatory policy to check identification of all customers. Utilizing an ethnographic decision model, we found that bouncers were significantly more likely to card customers that…

  11. Operational workforce planning for check-in counters at airports

    DEFF Research Database (Denmark)

    Stolletz, Raik

    2010-01-01

    This paper addresses operation models for workforce planning for check-in systems at airports. We characterize different tasks of the hierarchical workforce planning problem with time-dependent demand. A binary linear programming formulation is developed for the fortnightly tour scheduling problem...

  12. Symmetry and partial order reduction techniques in model checking Rebeca

    NARCIS (Netherlands)

    Jaghouri, M.M.; Sirjani, M.; Mousavi, M.R.; Movaghar, A.

    2007-01-01

    Rebeca is an actor-based language with formal semantics that can be used in modeling concurrent and distributed software and protocols. In this paper, we study the application of partial order and symmetry reduction techniques to model checking dynamic Rebeca models. Finding symmetry based equivalen

  13. Lessons Learned Model Checking an Industrial Communications Library

    Science.gov (United States)

    2005-09-01

    Lecture Notes in Computer Science [LNCS], volume 2057). Toronto, Canada, May 19-20, 2001. Berlin...Model Checking,” 128-147. Integrated Formal Methods: The 4th International Conference (IFM 2004) ( Lecture Notes in Computer Science [LNCS], volume...on Computer Aided Verification (CAV 1990). ( Lecture Notes in Computer Science [LNCS], volume 531). New Brunswick, NJ, June 18-21, 1990.

  14. Model checking conditional CSL for continuous-time Markov chains

    DEFF Research Database (Denmark)

    Gao, Yang; Xu, Ming; Zhan, Naijun;

    2013-01-01

    In this paper, we consider the model-checking problem of continuous-time Markov chains (CTMCs) with respect to conditional logic. To the end, we extend Continuous Stochastic Logic introduced in Aziz et al. (2000) [1] to Conditional Continuous Stochastic Logic (CCSL) by introducing a conditional...

  15. Two Types of Test Assembly Checked and Accepted for CEFR

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    The detail design of two types of test assembly used in the simulating transportation, and themounting and hydraulic test were completed in 2002. This two types of test assembly are manufactured inshanghai No.1 machine tool works, and checked and accepted in March 2003. The former is used in the

  16. Surrogate headform accelerations associated with stick checks in girls' lacrosse.

    Science.gov (United States)

    Crisco, Joseph J; Costa, Laura; Rich, Ryan; Schwartz, Joel B; Wilcox, Bethany

    2015-04-01

    Girls' lacrosse is fundamentally a different sport than boys' lacrosse, and girls are not required to wear protective headgear. Recent epidemiological studies have found that stick checks are the leading cause of concussion injury in girls' lacrosse. The purpose of this study was to determine stick check speeds and estimate the head acceleration associated with direct checks to the head. In addition, we briefly examine if commercially available headgear can mitigate the accelerations. Seven (n = 7) experienced female lacrosse players checked, with varying severity, a NOSCAE and an ASTM headform. Stick speed at impact and the associated peak linear accelerations of the headform were recorded. The NOCSAE headform was fitted with four commercially available headgear and similar stick impact testing was performed. The median stick impact speed was 8.1 m/s and 777 deg/s. At these speeds, peak linear acceleration was approximately 60g. Three out of the four headgear significantly reduced the peak linear acceleration when compared with the bare headform. These data serve as baseline for understanding the potential mechanism and reduction of concussions from stick impacts in girls' lacrosse.

  17. Combining monitoring with run-time assertion checking

    NARCIS (Netherlands)

    Gouw, Stijn de

    2013-01-01

    We develop a new technique for Run-time Checking for two object-oriented languages: Java and the Abstract Behavioral Specification language ABS. In object-oriented languages, objects communicate by sending each other messages. Assuming encapsulation, the behavior of objects is completely determine

  18. The Role of Personal Ethical Checking in Courageous School Leadership

    Science.gov (United States)

    Buskey, Frederick C.; Pitts, Eric M.

    2013-01-01

    When school leaders make calculated decisions to deviate from hierarchical or cultural directives and norms, they may be viewed as mavericks or brigands. This paper details a process of ethical checking to help differentiate ethical decisions from more arbitrary or self-serving decisions. The paper examines conflicts inherent in many professional…

  19. Using Model Checking for Analyzing Distributed Power Control Problems

    DEFF Research Database (Denmark)

    Brihaye, Thomas; Jungers, Marc; Lasaulce, Samson

    2010-01-01

    Model checking (MC) is a formal verification technique which has been known and still knows a resounding success in the computer science community. Realizing that the distributed power control ( PC) problem can be modeled by a timed game between a given transmitter and its environment, the authors...

  20. Check list of the Hungarian Salticidae with biogeographical notes

    Directory of Open Access Journals (Sweden)

    Szüts, Tamás

    2003-04-01

    Full Text Available An updated check list of the Hungarian jumping spider fauna is presented. 70 species are recorded from Hungary so far. Four species are new to the Hungarian fauna: Hasarius adansoni, Neon valentulus, Sitticus caricis, Synageles subcingulatus. With 12 original drawings.

  1. Architecture Compliance Checking of Semantically Rich Modular Architectures

    NARCIS (Netherlands)

    Sjaak Brinkkemper; Christian Köppe; Dr. Leo Pruijt

    2013-01-01

    Abstract-Architecture Compliance Checking (ACC) is an approach to verify the conformance of implemented program code to high-level models of architectural design. ACC is used to prevent architectural erosion during the development and evolution of a software system. Static ACC, based on static

  2. First experiences with the LHC BLM sanity checks

    CERN Document Server

    Emery, J; Effinger, E; Nordt, A; Sapinski, M G; Zamantzas, C

    2010-01-01

    The reliability concerns have driven the design of the Large Hardron Collider (LHC) Beam Loss Monitoring (BLM) system from the early stage of the studies up to the present commissioning and the latest development of diagnostic tools. To protect the system against non-conformities, new ways of automatic checking have been developed and implemented. These checks are regularly and systematically executed by the LHC operation team to ensure that the system status is after each test "as good as new". The sanity checks are part of this strategy. They are testing the electrical part of the detectors (ionisation chamber or secondary emission detector), their cable connections to the front-end electronics, further connections to the back-end electronics and their ability to request a beam abort. During the installation and in the early commissioning phase, these checks have shown their ability to find also non-conformities caused by unexpected failure event scenarios. In every day operation, a non-conformity discovere...

  3. Mobile vehicle road and weather observation quality check methods

    Science.gov (United States)

    Koller, Daniel Raymond

    data quality and accuracy, requiring the development of quality checks for mobile data collection. Using OBDII-equipped automobiles and mobile collection methods, we can begin to address issues of data quality by understanding, characterizing, and demonstrating the quality of mobile system observations from operational and research environments. Several forms of quality checking can be used, including range checks, Barnes spatial checks, comparing vehicle data to road weather models, and applying Clarus quality check methodologies and algorithms to mobile observations. Development of these quality checks can lead to the future integration of mobile data into the Clarus system, data implementation for improved forecasting, maintenance decision support, and traveler safety. This paper will discuss the benefits and challenges in mobile data collection, along with how the development and implementation of a system of quality checks will improve the quality and accuracy of mobile data collection.

  4. Patterns of attendance to health checks in a municipality setting: the Danish ‘Check Your Health Preventive Program’

    Directory of Open Access Journals (Sweden)

    Anne-Louise Bjerregaard

    2017-03-01

    More than half of a general population voluntarily attended a general health check, despite a resource intensive offer. People with low resources had lower attendance rates. This study adds a detailed description of mutually exclusive groups of attenders, for use in future planning and implementation of preventive actions.

  5. Stove checking behaviour in people with OCD vs. anxious controls.

    Science.gov (United States)

    Bucarelli, Bianca; Purdon, Christine

    2016-12-01

    A growing body of research suggests that the repetition of an action degrades memory for that action, as well as confidence that is has been done correctly. This has important implications for understanding the compulsive repetition of actions characteristic of obsessive compulsive disorder (OCD). At this time, though, much of the research has been conducted on analogue or nonclinical OCD samples in comparison to healthy controls and often using virtual, as opposed to actual, threat stimuli. Furthermore, although it has been argued that people with OCD are overly attentive to threat stimuli, the research on actual attention to threat is scant. People with a principal diagnosis of OCD (n = 30) and people with a clinically significant diagnosis of an anxiety disorder, but no OCD (n = 18) completed measures of memory confidence and responsibility and then underwent a stove-checking task in a functioning kitchen while wearing a portable eye tracking device. Pre- and post-task ratings of harm and responsibility were taken, along with post-task ratings of memory and certainty. People with OCD did not exhibit poorer memory confidence than the anxious control (AC) group, but did report greater trait and state responsibility for harm. The OCD group checked longer than did the AC group and check duration predicted post-task ratings of harm, but to the same extent in both groups. People with OCD attended to threat items less than did the AC group. Greater visual attention to the stove during the checking period was associated with greater post-task ratings of responsibility and harm and with less certainty in and memory for the check - but only for the AC group. The sample size was modest, women were over-represented and problems with the eye tracking device reduced the amount of reliable data available for analysis. Compulsions are complex actions that are mediated by many trait, state and contextual factors. People with OCD may be able to circumvent self

  6. Perseveration causes automatization of checking behavior in obsessive-compulsive disorder.

    Science.gov (United States)

    Dek, Eliane C P; van den Hout, Marcel A; Engelhard, Iris M; Giele, Catharina L; Cath, Danielle C

    2015-08-01

    Repeated checking leads to reductions in meta-memory (i.e., memory confidence, vividness and detail), and automatization of checking behavior (Dek, van den Hout, Giele, & Engelhard, 2014, 2015). Dek et al. (2014) suggested that this is caused by increased familiarity with the checked stimuli. They predicted that defamiliarization of checking by modifying the perceptual characteristics of stimuli would cause de-automatization and attenuate the negative meta-memory effects of re-checking. However, their results were inconclusive. The present study investigated whether repeated checking leads to automatization of checking behavior, and if defamiliarization indeed leads to de-automatization and attenuation of meta-memory effects in patients with OCD and healthy controls. Participants performed a checking task, in which they activated, deactivated and checked threat-irrelevant stimuli. During a pre- and post-test checking trial, check duration was recorded and a reaction time task was simultaneously administered as dual-task to assess automatization. After the pre- and post-test checking trial, meta-memory was rated. Results showed that relevant checking led to automatization of checking behavior on the RT measure, and negative meta-memory effects for patients and controls. Defamiliarization led to de-automatization measured with the RT task, but did not attenuate the negative meta-memory effects of repeated checking. Clinical implications are discussed.

  7. Changes to criminal records checks used to safeguard vulnerable patients.

    Science.gov (United States)

    Griffith, Richard; Tengnah, Cassam

    2012-07-01

    The Protection of Freedoms Act 2012 is introducing changes to the Criminal Records Bureau (CRB) checks carried out on those people who work with vulnerable groups. The new law is the coalition Government's response to the criticism of the Safeguarding Vulnerable Group Act 2006. It will merge the CRB and Independent Safeguarding Authority into a new Disclosure and Barring Service and will enhance the rights of applicants to challenge the CRB's right to disclose non-conviction information as part of an enhanced criminal records check. In the first of two articles on the Protection of Freedoms Act 2012, Richard Griffith and Cassam Tengnah discuss the current framework for disclosing criminal records and the impact of the changes on district nurses applying for new posts.

  8. Rejuvinasi Sistem Checks and Balances Dalam Sistem Ketatanegaraan di Indonesia

    Directory of Open Access Journals (Sweden)

    Indra Rahmatullah

    2016-04-01

    Full Text Available Rejuvenation of Check and Balance System in Statehood System in Indonesia. Instead of delegated to only a person or an Institution, State Sovereignty shall be divided into some Institutions (separation of power.  The concept of Separation of power is difficult to be implemented because the each State Institution cannot share their power, therefore the concept of distribution of power has been introduced as alternative. This concept recognise Check and balances system. However, It will not guarantee harmony between State Institution. It exist the tension between State Institutions because They feel having the same authority, as seen in some cases such as between Parliament and president on Bill of  head of regional election, Police Department and Commission of Eradication Corruption and the latest is the conflict between Supreme Court and Judicial Commission. DOI: 10.15408/jch.v1i2.2992

  9. Mixed Portmanteau Test for Diagnostic Checking of Time Series Models

    Directory of Open Access Journals (Sweden)

    Sohail Chand

    2014-01-01

    Full Text Available Model criticism is an important stage of model building and thus goodness of fit tests provides a set of tools for diagnostic checking of the fitted model. Several tests are suggested in literature for diagnostic checking. These tests use autocorrelation or partial autocorrelation in the residuals to criticize the adequacy of fitted model. The main idea underlying these portmanteau tests is to identify if there is any dependence structure which is yet unexplained by the fitted model. In this paper, we suggest mixed portmanteau tests based on autocorrelation and partial autocorrelation functions of the residuals. We derived the asymptotic distribution of the mixture test and studied its size and power using Monte Carlo simulations.

  10. SMT-based Bounded Model Checking with Difference Logic Constraints

    CERN Document Server

    Bersani, Marcello M; Morzenti, Angelo; Pradella, Matteo; Rossi, Matteo; Pietro, Pierluigi San

    2010-01-01

    Traditional Bounded Model Checking (BMC) is based on translating the model checking problem into SAT, the Boolean satisfiability problem. This paper introduces an encoding of Linear Temporal Logic with Past operators (PLTL) into the Quantifier-Free Difference Logic with Uninterpreted Functions (QF-UFIDL). The resulting encoding is a simpler and more concise version of existing SATbased encodings, currently used in BMC. In addition, we present an extension of PLTL augmented with arithmetic relations over integers, which can express unbounded counters; as such, the extended logic is more expressive than PLTL. We introduce suitable restrictions and assumptions that are shown to make the verification problem for the extended logic decidable, and we define an encoding of the new logic into QF-UFIDL. Finally, a performance comparison with the SAT-based approach on purely PLTL examples shows significant improvements in terms of both execution time and memory occupation.

  11. Model Checking Real-Time Value-Passing Systems

    Institute of Scientific and Technical Information of China (English)

    Jing Chen; Zio-Ning Cao

    2004-01-01

    In this paper,to model check real-time value-passing systems,a formal language Timed Symbolic Transition Graph and a logic system named Timed Predicate μ-Calculus are proposed.An algorithm is presented which is local in that it generates and investigates the reachable state space in top-down fashion and maintains the partition for time evaluations as coarse as possible while on-the-fly instantiating data variables.It can deal with not only data variables with finite value domain,but also the so called data independent variables with infinite value domain.To authors knowledge,this is the first algorithm for model checking timed systems containing value-passing features.

  12. Efficient family-based model checking via variability abstractions

    DEFF Research Database (Denmark)

    Dimovski, Aleksandar; Al-Sibahi, Ahmad Salim; Brabrand, Claus

    2016-01-01

    variational models using the standard version of (single-system) Spin. The variability abstractions are first defined as Galois connections on semantic domains. We then show how to use them for defining abstract family-based model checking, where a variability model is replaced with an abstract version of it......Many software systems are variational: they can be configured to meet diverse sets of requirements. They can produce a (potentially huge) number of related systems, known as products or variants, by systematically reusing common parts. For variational models (variational systems or families...... of related systems), specialized family-based model checking algorithms allow efficient verification of multiple variants, simultaneously, in a single run. These algorithms, implemented in a tool Snip, scale much better than ``the brute force'' approach, where all individual systems are verified using...

  13. HDL Implementation of Low Density Parity Check (LDPC Decoder

    Directory of Open Access Journals (Sweden)

    Pawandip Kaur

    2012-03-01

    Full Text Available Low-Density Parity-Check (LDPC codes are one of the most promising error-correcting codes approaching Shannon capacity and have been adopted in many applications. These codes offer huge advantages in terms of coding gain, throughput and power dissipation. Error correction algorithms are often implemented in hardware for fast processing to meet the real-time needs of communication systems. However hardwareimplementation of LDPC decoders using traditional Hardware Description Language (HDL based approach is a complex and time consuming task. In this paper HDL Implementation of Low Density Parity Check Decoder architecture is presented with different rates i.e. 1/2, 2/3, 3/4, 4/7, 8/9, 9/10 and variable data lengths i.e. 8, 16, 32, 64, 128, 256 bits and consequent changeable precision factor.

  14. Checking for Optimal Solutions in Some NP-Complete Problems

    Science.gov (United States)

    Bauer, Michel; Orland, Henri

    2005-09-01

    For some weighted NP-complete problems, checking whether a proposed solution is optimal is a nontrivial task. Such is the case for the traveling salesman problem, or the spin-glass problem in three dimensions. In this Letter, we consider the weighted tripartite matching problem, a well known NP-complete problem. We write mean-field finite temperature equations for this model and derive their zero temperature limit. We show that any solution of the zero temperature equations provides an exact absolute ground state of the system. As a consequence, we propose a criterion which can be checked in polynomial time, and such that given a putative optimal solution, if the criterion is satisfied, then the solution is indeed optimal. This criterion is generalized to a class of variants of the multiple traveling salesmen problems.

  15. A Novel Nanometric Reversible Signed Divider with Overflow Checking Capability

    Directory of Open Access Journals (Sweden)

    Faraz Dastan

    2012-03-01

    Full Text Available One of the best approaches for designing future computers is that we use reversible logic. Reversible logic circuits have lower power consumption than the common circuits, used in computers nowadays. In this study we propose a new reversible division circuit. This reversible division circuit is signed divider and has an overflow checking capability. Among the designed and proposed reversible division circuits, our proposed division circuit is the first reversible signed divider with overflow checking capability which has been designed. In this circuit we use some reversible components like reversible parallel adder, reversible left-shift register, reversible multiplexer, reversible n-bit register and reversible n-bit register with parallel load line. In this paper all the scales are in the nanometric area.

  16. Detecting feature interactions in Web services with model checking techniques

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    As a platform-independent software system, a Web service is designed to offer interoperability among diverse and heterogeneous applications.With the introduction of service composition in the Web service creation, various message interactions among the atomic services result in a problem resembling the feature interaction problem in the telecommunication area.This article defines the problem as feature interaction in Web services and proposes a model checking-based detection method.In the method, the Web service description is translated to the Promela language - the input language of the model checker simple promela interpreter (SPIN), and the specific properties, expressed as linear temporal logic (LTL) formulas, are formulated according to our classification of feature interaction.Then, SPIN is used to check these specific properties to detect the feature interaction in Web services.

  17. Model checking abstract state machines with answer set programming

    OpenAIRE

    2006-01-01

    Answer Set Programming (ASP) is a logic programming paradigm that has been shown as a useful tool in various application areas due to its expressive modelling language. These application areas include Bourided Model Checking (BMC). BMC is a verification technique that is recognized for its strong ability of finding errors in computer systems. To apply BMC, a system needs to be modelled in a formal specification language, such as the widely used formalism of Abstract State Machines (ASMs). In ...

  18. Model Checking Processes Specified In Join-Calculus Algebra

    Directory of Open Access Journals (Sweden)

    Sławomir Piotr Maludziński

    2014-01-01

    Full Text Available This article presents a model checking tool used to verify concurrent systems specified in join-calculus algebra. The temporal properties of systems under verification are expressed in CTL logic. Join-calculus algebra with its operational semantics defined by the chemical abstract machine serves as the basic method for the specification of concurrent systems and their synchronization mechanisms, and allows the examination of more complex systems.

  19. Model Checking with Multi-Threaded IC3 Portfolios

    Science.gov (United States)

    2015-01-15

    Model Checking with Multi-Threaded IC3 Portfolios Sagar Chaki and Derrick Karimi Software Engineering Institute, Carnegie Mellon University {chaki...different runs varies randomly depending on the thread interleaving. The use of a portfolio of solvers to maximize the likelihood of a quick solution is...investigated. Using the Extreme Value theorem, the runtime of each variant, as well as their portfolios is analysed statistically. A formula for the

  20. Grounding devices of electrical equipment's installation and check to maintain

    Institute of Scientific and Technical Information of China (English)

    王鹏

    2009-01-01

    At this stage in real life,the incidents of electricity are increasing,the main reason is that the subjective sense is weak,non-importance,especially the operation and maintenance is more neglected,and even there is no sense in this area.In this paper,based on electrical equipment grounding system for use in practice,simple introdusing grounding device of electrical equipment's installation and maintenance checks.

  1. Building Reusable Software Component For Optimization Check in ABAP Coding

    Directory of Open Access Journals (Sweden)

    P.Shireesha

    2010-07-01

    Full Text Available Software component reuse is the software engineering practice of developing newsoftware products from existing components. A reuse library or component reuserepository organizes stores and manages reusable components. This paper describeshow a reusable component is created, how it reuses the function and checking ifoptimized code is being used in building programs and applications. Finally providingcoding guidelines, standards and best practices used for creating reusable componentsand guidelines and best practices for making configurable and easy to use.

  2. Logic Model Checking of Unintended Acceleration Claims in Toyota Vehicles

    Science.gov (United States)

    Gamble, Ed

    2012-01-01

    Part of the US Department of Transportation investigation of Toyota sudden unintended acceleration (SUA) involved analysis of the throttle control software, JPL Laboratory for Reliable Software applied several techniques including static analysis and logic model checking, to the software; A handful of logic models were build, Some weaknesses were identified; however, no cause for SUA was found; The full NASA report includes numerous other analyses

  3. Symbolic Model Checking and Analysis for E-Commerce Protocol

    Institute of Scientific and Technical Information of China (English)

    WEN Jing-Hua; ZHANG Mei; LI Xiang

    2005-01-01

    A new approach is proposed for analyzing non-repudiation and fairness of e-commerce protocols. The authentication e-mail protocol CMP1 is modeled as finite state machine and analyzed in two vital aspects - non-repudiation and fairness using SMV. As a result, the CMP1 protocol is not fair and we have improved it. This result shows that it is effective to analyze and check the new features of e-commerce protocols using SMV model checker

  4. A Graphical μ-Calculus and Local Model Checking

    Institute of Scientific and Technical Information of China (English)

    林惠民

    2002-01-01

    A graphical notation for the propositionalμ-calculus, called modal graphs, ispresented. It is shown that both the textual and equational presentations of theμ-calculus canbe translated into modal graphs. A model checking algorithm based on such graphs is proposed.The algorithm is truly local in the sense that it only generates the parts of the underlyingsearch space which are necessary for the computation of the final result. The correctness of thealgorithm is proven and its complexity analysed.

  5. What is the purpose of the Stress Check Program?

    OpenAIRE

    Sugawara, Norio; Saito, Manabu; Nakamura, Kazuhiko

    2016-01-01

    Since December 1, 2015, the Japanese government has required employers to conduct the Stress Check Program. The Ministry of Health, Labour and Welfare announced that this program should focus on the primary prevention of mental health problems. Although employers are obliged to perform screening for mental health problems and a physician's interview, employees are not mandated to participate in this program. Classical occupational health studies have accumulated evidence indicating that quant...

  6. Independence-Based Optimization of Epistemic Model Checking

    Science.gov (United States)

    2017-02-22

    model checking, Chaum’s Dining Cryptographers protocol [10] is described in Section 3. Sec- tion 4 recalls Shenoy and Shafer’s valuation algebra , which...future directions. Appendix A provides additional detail on the experiments. 2 Background: Epistemic Logic We begin by recalling some basic definitions...anonymous broadcast. This protocol, both in its basic form, as well as an extension that is more generally applicable, has previously been analysed using

  7. Strength Check Analysis for Gear Shaft of Automobile Transmission

    OpenAIRE

    Yongxiang Li; Weiqiang Xia; Liwen Nan; Youjia Zhao; Fujin Yu

    2013-01-01

    As the main drive components of the automobile transmission, the performance of gear shaft plays an important role on transmission performance. Aiming at the existing problems of the traditional strength check method of gear shaft, the objective of this study is to take a five-speed transmission as an example, to accomplish the strength analysis of gear shaft of the automobile transmission based on the MASTA software. Furthermore, the simulation modeling of the transmission is built completel...

  8. Building Reusable Software Component For Optimization Check in ABAP Coding

    CERN Document Server

    Shireesha, P; 10.5121/ijsea.2010.1303

    2010-01-01

    Software component reuse is the software engineering practice of developing new software products from existing components. A reuse library or component reuse repository organizes stores and manages reusable components. This paper describes how a reusable component is created, how it reuses the function and checking if optimized code is being used in building programs and applications. Finally providing coding guidelines, standards and best practices used for creating reusable components and guidelines and best practices for making configurable and easy to use.

  9. Building Reusable Software Component For Optimization Check in ABAP Coding

    OpenAIRE

    Shireesha, P.; S.S.V.N.Sharma

    2010-01-01

    Software component reuse is the software engineering practice of developing new software products from existing components. A reuse library or component reuse repository organizes stores and manages reusable components. This paper describes how a reusable component is created, how it reuses the function and checking if optimized code is being used in building programs and applications. Finally providing coding guidelines, standards and best practices used for creating reusable components and ...

  10. Logic Model Checking of Unintended Acceleration Claims in Toyota Vehicles

    Science.gov (United States)

    Gamble, Ed

    2012-01-01

    Part of the US Department of Transportation investigation of Toyota sudden unintended acceleration (SUA) involved analysis of the throttle control software, JPL Laboratory for Reliable Software applied several techniques including static analysis and logic model checking, to the software; A handful of logic models were build, Some weaknesses were identified; however, no cause for SUA was found; The full NASA report includes numerous other analyses

  11. Proof Validation in Real Analysis: Inferring and Checking Warrants

    Science.gov (United States)

    Alcock, Lara; Weber, Keith

    2005-01-01

    In the study reported here, we investigate the skills needed to validate a proof in real analysis, i.e., to determine whether a proof is valid. We first argue that when one is validating a proof, it is not sufficient to make certain that each statement in the argument is true. One must also check that there is good reason to believe that each…

  12. Network segregation in a model of misinformation and fact checking

    CERN Document Server

    Tambuscio, Marcella; Ciampaglia, Giovanni Luca; Ruffo, Giancarlo

    2016-01-01

    Misinformation under the form of rumor, hoaxes, and conspiracy theories spreads on social media at alarming rates. One hypothesis is that, since social media are shaped by homophily, belief in misinformation may be more likely to thrive on those social circles that are segregated from the rest of the network. One possible antidote is fact checking which, in some cases, is known to stop rumors from spreading further. However, fact checking may also backfire and reinforce the belief in a hoax. Here we take into account the combination of network segregation, finite memory and attention, and fact-checking efforts. We consider a compartmental model of two interacting epidemic processes over a network that is segregated between gullible and skeptic users. Extensive simulation and mean-field analysis show that a more segregated network facilitates the spread of a hoax only at low forgetting rates, but has no effect when agents forget at faster rates. This finding may inform the development of mitigation techniques ...

  13. Approximating Attractors of Boolean Networks by Iterative CTL Model Checking.

    Science.gov (United States)

    Klarner, Hannes; Siebert, Heike

    2015-01-01

    This paper introduces the notion of approximating asynchronous attractors of Boolean networks by minimal trap spaces. We define three criteria for determining the quality of an approximation: "faithfulness" which requires that the oscillating variables of all attractors in a trap space correspond to their dimensions, "univocality" which requires that there is a unique attractor in each trap space, and "completeness" which requires that there are no attractors outside of a given set of trap spaces. Each is a reachability property for which we give equivalent model checking queries. Whereas faithfulness and univocality can be decided by model checking the corresponding subnetworks, the naive query for completeness must be evaluated on the full state space. Our main result is an alternative approach which is based on the iterative refinement of an initially poor approximation. The algorithm detects so-called autonomous sets in the interaction graph, variables that contain all their regulators, and considers their intersection and extension in order to perform model checking on the smallest possible state spaces. A benchmark, in which we apply the algorithm to 18 published Boolean networks, is given. In each case, the minimal trap spaces are faithful, univocal, and complete, which suggests that they are in general good approximations for the asymptotics of Boolean networks.

  14. Spot-checks to measure general hygiene practice.

    Science.gov (United States)

    Sonego, Ina L; Mosler, Hans-Joachim

    2016-01-01

    A variety of hygiene behaviors are fundamental to the prevention of diarrhea. We used spot-checks in a survey of 761 households in Burundi to examine whether something we could call general hygiene practice is responsible for more specific hygiene behaviors, ranging from handwashing to sweeping the floor. Using structural equation modeling, we showed that clusters of hygiene behavior, such as primary caregivers' cleanliness and household cleanliness, explained the spot-check findings well. Within our model, general hygiene practice as overall concept explained the more specific clusters of hygiene behavior well. Furthermore, the higher general hygiene practice, the more likely children were to be categorized healthy (r = 0.46). General hygiene practice was correlated with commitment to hygiene (r = 0.52), indicating a strong association to psychosocial determinants. The results show that different hygiene behaviors co-occur regularly. Using spot-checks, the general hygiene practice of a household can be rated quickly and easily.

  15. Assembly-line health check up in digitalized hospital.

    Science.gov (United States)

    Liu, Yalan; Yao, Bin; Zhang, Zigang

    2002-01-01

    The health check up flow of digital hospital can be consulted with the assembly line of industry factory. Because they have the following same features: highly specialized workstation, closeness and continuance, rhythm, balanced production, continuous production. The essential prerequisites are as the follows: The inspecting items and methods should be stable; advanced product mix and stable production design; standardized raw material, consumption, procedure, inspection method; there are lots of request for health inspection; the customers move at the least unit; the space arrangement should be reasonable; the time arrangement should be proportion. With the computer net, the digital inspection can achieves the raw material controlling accurately. The basis of check up line concerns about equipment, net and software, data collection, and personnel. The group technology is used in the health inspection flow design of the digital hospital in the field of items customers and zone redivided. The digital assembly linemic health inspect has the following stages: member registering, notice, check in, arrange order, time control, report, feedback and analysis. The assembly linemic has following advantages: increasing the productivity, the space utility, satisfaction of customer, fund returning, lowering the cost and ensuring the quality.

  16. Assembly-Line Health Check up in Digitalized Hospital

    Institute of Scientific and Technical Information of China (English)

    刘雅兰; 姚斌; 张子刚

    2002-01-01

    Summary: The health check up flow of digital hospital can be consulted with the assembly line ofindustry factory. Because they have the following same features: highly specialized workstation,closeness and continuance, rhythm, balanced production, continuous production. The essentialprerequisites are as the follows: The inspecting items and methods should be stable; advancedproduct mix and stable production design; standardized raw material, consumption, procedure,inspection method; there are lots of request for health inspection; the customers move at the leastunit; the space arrangement should be reasonable; the time arrangement should be proportion.With the computer net, the digital inspection can achieves the raw material controlling accurately.The basis of check up line concerns about equipment, net and software, data collection, and per-sonnel. The group technology is used in the health inspection flow design of the digital hospital inthe field of items customers and zone redivided. The digital assembly linemic health inspect has thefollowing stages: member registering, notice, check in, arrange order, time control, report, feed-back and analysis. The assembly linemic has following advantages: increasing the productivity,the space utility, satisfaction of customer, fund returning, lowering the cost and ensuring thequality.

  17. Abstraction and Refinement in Static Model-Checking

    CERN Document Server

    Musumbu, Kaninda

    2009-01-01

    interpretation is a general methodology for building static analyses of programs. It was introduced by P. and R. Cousot in \\cite{cc}. We present, in this paper, an application of a generic abstract interpretation to domain of model-checking. Dynamic checking are usually easier to use, because the concept are establishe d and wide well know. But they are usually limited to systems whose states space is finite. In an other part, certain faults cannot be detected dynamically, even by keeping track of the history of the states space.Indeed, the classical problem of finding the right test cases is far from trivial and limit the abilities of dynamic checkers further. Static checking have the advantage that they work on a more abstract level than dynamic checker and can verify system properties for all inputs. Problem, it is hard to guarantee that a violation of a modeled property corresponds to a fault in the concrete system. We propose an approach, in which we generate counter-examples dynamically using the abstra...

  18. Improved Trial Division Technique for Primality Checking in RSA Algorithm

    Directory of Open Access Journals (Sweden)

    Kumarjit Banerjee

    2012-07-01

    Full Text Available The RSA cryptosystem, invented by Ron Rivest, Adi Shamir and Len Adleman was first publicized in the August 1977 issue of Scientific American. The security level of this algorithm very much depends on two large prime numbers. To check the primality of large number in personal computer is huge time consuming using the best known trial division algorithm. The time complexity for primality testing has been reduced using the representation of divisors in the form of 6n±1. According to the fundamental theorem of Arithmetic, every number has unique factorization. So to check primality, it is sufficient to check if the number is divisible by any prime below the square root of the number. The set of divisors obtained by 6n±1 form representation contains many composites. These composite numbers have been reduced by 30k approach. In this paper, the number of composites has been further reduced using 210k approach. A performance analysis in time complexity has been given between 210k approach and other prior applied methods. It has been observed that the time complexity for primality testing has been reduced using 210k approach.

  19. Identifying and Managing Data Validity Challenges with Automated Data Checks in the AmeriFlux Flux Measurement Network

    Science.gov (United States)

    Poindexter, C.; Pastorello, G.; Papale, D.; Trotta, C.; Ribeca, A.; Canfora, E.; Faybishenko, B.; Samak, T.; Gunter, D.; Hollowgrass, R.; Agarwal, D.

    2014-12-01

    AmeriFlux is a network of sites managed by independent investigators measuring carbon, water and heat fluxes. Individual investigators perform many data validity checks. Network-level data validity checks are also being applied to increase network-wide data consistency. A number of different types or errors occur in flux data, and while corrections have been developed to address some types of errors, other error types can be difficult to detect. To identify errors rapidly and consistently, we have developed automated data validity checks that rely on theoretical limits or relationships for specific measured variables. We present an example of a data validity check that is being developed for the friction velocity u*. The friction velocity is a crucial variable used to identify when low turbulent mixing in the atmospheric boundary layer invalidates eddy covariance measurements of fluxes. It is measured via sonic anemometer and is related to the wind speed WS, the measurement height relative to the canopy height, and the surface roughness, through the log law. Comparing independent measurements of WS and u* can help identify issues related to the sensor but doesn't take into consideration changes in the canopy (e.g. due to leaf emergence). The u* data check proposed relies on recent work comparing multiple methods for determining the aerodynamic roughness length z0 and zero plane displacement d (Graf, A., A. van de Boer, A. Moene & H. Vereecken, 2014, Boundary-Layer Meteorol., 151, 373-387). These methods, each of which is most robust across a different atmospheric stability range, yield multiple estimates for z0 and d at daily resolution. We use these multiple estimates for z0 and d, as well as half-hourly wind speeds and Obukhov length scales and their uncertainties to generate a predicted u* and a tolerance around this predicted value. In testing, this check correctly identified as invalid u* data known to be erroneous but did not flag data that could look

  20. Energy reduction through voltage scaling and lightweight checking

    Science.gov (United States)

    Kadric, Edin

    As the semiconductor roadmap reaches smaller feature sizes and the end of Dennard Scaling, design goals change, and managing the power envelope often dominates delay minimization. Voltage scaling remains a powerful tool to reduce energy. We find that it results in about 60% geomean energy reduction on top of other common low-energy optimizations with 22nm CMOS technology. However, when voltage is reduced, it becomes easier for noise and particle strikes to upset a node, potentially causing Silent Data Corruption (SDC). The 60% energy reduction, therefore, comes with a significant drop in reliability. Duplication with checking and triple-modular redundancy are traditional approaches used to combat transient errors, but spending 2--3x the energy for redundant computation can diminish or reverse the benefits of voltage scaling. As an alternative, we explore the opportunity to use checking operations that are cheaper than the base computation they are guarding. We devise a classification system for applications and their lightweight checking characteristics. In particular, we identify and evaluate the effectiveness of lightweight checks in a broad set of common tasks in scientific computing and signal processing. We find that the lightweight checks cost only a fraction of the base computation (0-25%) and allow us to recover the reliability losses from voltage scaling. Overall, we show about 50% net energy reduction without compromising reliability compared to operation at the nominal voltage. We use FPGAs (Field-Programmable Gate Arrays) in our work, although the same ideas can be applied to different systems. On top of voltage scaling, we explore other common low-energy techniques for FPGAs: transmission gates, gate boosting, power gating, low-leakage (high-Vth) processes, and dual-V dd architectures. We do not scale voltage for memories, so lower voltages help us reduce logic and interconnect energy, but not memory energy. At lower voltages, memories become dominant

  1. Consistency Property of Finite FC-Normal Logic Programs

    Institute of Scientific and Technical Information of China (English)

    Yi-Song Wang; Ming-Yi Zhang; Yu-Ping Shen

    2007-01-01

    Marek's forward-chaining construction is one of the important techniques for investigating the non-monotonic reasoning. By introduction of consistency property over a logic program, they proposed a class of logic programs, FC-normal programs, each of which has at least one stable model. However, it is not clear how to choose one appropriate consistency property for deciding whether or not a logic program is FC-normal. In this paper, we firstly discover that, for any finite logic program ∏, there exists the least consistency property LCon(∏) over ∏, which just depends on ∏ itself, such that, ∏ is FC-normal if and only if ∏ is FC-normal with respect to (w.r.t.) LCon(∏). Actually, in order to determine the FC-normality of a logic program, it is sufficient to check the monotonic closed sets in LCon(∏) for all non-monotonic rules, that is LFC(∏). Secondly, we present an algorithm for computing LFC(∏). Finally, we reveal that the brave reasoning task and cautious reasoning task for FC-normal logic programs are of the same difficulty as that of normal logic programs.

  2. A dynamical mechanism for large volumes with consistent couplings

    Science.gov (United States)

    Abel, Steven

    2016-11-01

    A mechanism for addressing the "decompactification problem" is proposed, which consists of balancing the vacuum energy in Scherk-Schwarzed theories against contributions coming from non-perturbative physics. Universality of threshold corrections ensures that, in such situations, the stable minimum will have consistent gauge couplings for any gauge group that shares the same N = 2 beta function for the bulk excitations as the gauge group that takes part in the minimisation. Scherk-Schwarz compactification from 6D to 4D in heterotic strings is discussed explicitly, together with two alternative possibilities for the non-perturbative physics, namely metastable SQCD vacua and a single gaugino condensate. In the former case, it is shown that modular symmetries gives various consistency checks, and allow one to follow soft-terms, playing a similar role to R-symmetry in global SQCD. The latter case is particularly attractive when there is nett Bose-Fermi degeneracy in the massless sector. In such cases, because the original Casimir energy is generated entirely by excited and/or non-physical string modes, it is completely immune to the non-perturbative IR physics. Such a separation between UV and IR contributions to the potential greatly simplifies the analysis of stabilisation, and is a general possibility that has not been considered before.

  3. Technical note: electronic chart checks in a paperless radiation therapy clinic.

    Science.gov (United States)

    Yang, Deshan; Wu, Yu; Brame, Ryan S; Yaddanapudi, Sridhar; Rangaraj, Dharanipathy; Li, H Harold; Goddu, S Murty; Mutic, Sasa

    2012-08-01

    EcCk, which stands for Electronic Chart ChecK, is a computer software and database system. It was developed to improve quality and efficiency of patient chart checking in radiation oncology departments. The core concept is to automatically collect and analyze patient treatment data, and to report discrepancies and potential concerns. EcCk consists of several different computer technologies, including relational database, DICOM, dynamic HTML, and image processing. Implemented in MATLAB and C#, EcCk processes patient data in DICOM, PDF, Microsoft Word, database, and Pinnacle native formats. Generated reports are stored on the storage server and indexed in the database. A standalone report-browser program is implemented to allow users to view reports on any computer in the department. Checks are performed according to predefined logical rules, and results are presented through color-coded reports in which discrepancies are summarized and highlighted. Users examine the reports and take appropriate actions. The core design is intended to automate human task and to improve the reliability of the performed tasks. The software is not intended to replace human audits but rather to aid as a decision support tool. The software was successfully implemented in the clinical environment and has demonstrated the feasibility of automation of this common task with modern clinical tools. The software integrates multiple disconnected systems and successfully supports analysis of data in diverse formats. While the human is the ultimate expert, EcCk has a significant potential to improve quality and efficiency of patient treatment record audits, and to allow verification of tasks that are not easily performed by humans. EcCk can potentially relieve human experts from simple and repetitive tasks, and allow them to work on other important tasks, and in the end to improve the quality and safety of radiation therapy treatments.

  4. On the Reliability of RAID Systems: An Argument for More Check Drives

    CERN Document Server

    Mann, Sarah Edge; Rychlik, Marek

    2012-01-01

    In this paper we address issues of reliability of RAID systems. We focus on "big data" systems with a large number of drives and advanced error correction schemes beyond \\RAID{6}. Our RAID paradigm is based on Reed-Solomon codes, and thus we assume that the RAID consists of $N$ data drives and $M$ check drives. The RAID fails only if the combined number of failed drives and sector errors exceeds $M$, a property of Reed-Solomon codes. We review a number of models considered in the literature and build upon them to construct models usable for a large number of data and check drives. We attempt to account for a significant number of factors that affect RAID reliability, such as drive replacement or lack thereof, mistakes during service such as replacing the wrong drive, delayed repair, and the finite duration of RAID reconstruction. We evaluate the impact of sector failures that do not result in drive replacement. The reader who needs to consider large $M$ and $N$ will find applicable mathematical techniques con...

  5. Thirty-eighth supplement to the American Ornithologists' Union Check-List of North American Birds

    Science.gov (United States)

    Monroe, Burt L.; Banks, Richard C.; Fitzpatrick, John W.; Howell, Thomas R.; Johnson, Ned K.; Ouellet, Henri; Remsen, J.V.; Storer, Robert W.

    1991-01-01

    This fourth supplement after the 6th edition (1983) of the AOU "Check-list of North American Birds" consists of changes adopted by the Committee on Classification and Nomenclature between 1 March 1989 and 1 March 1991. The changes fall into eight categories: (1) five species (Ixobrychus sinensis, Porphyrula flavirostris, Sterna bergii, Streptopelia orientalis, and Ficedula narcissina) are added to the main list because of new distributional information; (2) six species (Pterodroma cervicalis, Ortalis wagleri, Lophornis brachylopha, Corvus sinaloae, Cinclocerthia gutturalis, and Loxops caeruleirostris) are added to the list because of the splitting of species previously in the list; (3) one extinct species (Dysmorodrepanis munroi) is added to the list because of re-identification of the unique type; (4) one scientific name (Speotyto cunicularia) is changed because of generic splitting; (5) one scientific name (Phalacrocorax brasilianus) is changed for nomenclature reasons, accompanied by a change in English name; (6) the spelling of one scientific name (Neocrex colombianus) is corrected; (7) to other English names are changed or corrected; and (8) one sequencing change is made. No new distributional information is included except as noted above (i.e. minor changes of distribution of distributional records within North America are not included). The twelve additions bring the number of species recognized as occurring within the Check-list area (main list) to 1957.

  6. Mobile Attendance Checking System on Android Platform for Kazakhstani University

    Science.gov (United States)

    Saparkhojayev, N.; Shakhov, E.; Mailybayev, Y.

    2016-04-01

    In the 21st century-the century of Information Technology, it is difficult to imagine life without any gadgets: phones, tablets, computers, laptops, and so on. Today, smartphones and tablets are becoming popular, and thus their operating systems become popular too. Android is designed for low-power devices that run on battery power at full capacity, using all of its services, such as cameras, lights, GPS navigation, Wi-Fi, etc. In Kazakhstani universities, the process of checking students’ attendance is one of the important issues, because final grade evaluation of students is based on their total number of appearances and their grades during the whole semester. This raises the question of having some tool to control students’ attendance. There are many possible ways of controlling attendance: there are many examples when universities prefer to control attendance by the use of paper sheet, and some universities prefer to use two-stage way of controlling attendance: firstly, teachers and professors use paper sheet for checking students’ attendance and after this, they fill out these information into a system manually. However, this is not an efficient way since there will be spent much of time for calling students names and putting marks like “presence” or “absence” if the class is a lecture class, and in this class at least 5 groups are presented. Furthermore, some students may call his/her friend as “presence” nevertheless to the fact that this student is currently absent. After taking into consideration all these issues and the fact that many gadgets use Android platform, authors of the following research paper decided to create a mobile system that makes easier to check students’ attendance automatically, and this system is implemented in Almaty Management University, Kazakhstan. The system is based on Android platform, and in this paper, details of this system are presented.

  7. Provenance based data integrity checking and verification in cloud environments.

    Science.gov (United States)

    Imran, Muhammad; Hlavacs, Helmut; Haq, Inam Ul; Jan, Bilal; Khan, Fakhri Alam; Ahmad, Awais

    2017-01-01

    Cloud computing is a recent tendency in IT that moves computing and data away from desktop and hand-held devices into large scale processing hubs and data centers respectively. It has been proposed as an effective solution for data outsourcing and on demand computing to control the rising cost of IT setups and management in enterprises. However, with Cloud platforms user's data is moved into remotely located storages such that users lose control over their data. This unique feature of the Cloud is facing many security and privacy challenges which need to be clearly understood and resolved. One of the important concerns that needs to be addressed is to provide the proof of data integrity, i.e., correctness of the user's data stored in the Cloud storage. The data in Clouds is physically not accessible to the users. Therefore, a mechanism is required where users can check if the integrity of their valuable data is maintained or compromised. For this purpose some methods are proposed like mirroring, checksumming and using third party auditors amongst others. However, these methods use extra storage space by maintaining multiple copies of data or the presence of a third party verifier is required. In this paper, we address the problem of proving data integrity in Cloud computing by proposing a scheme through which users are able to check the integrity of their data stored in Clouds. In addition, users can track the violation of data integrity if occurred. For this purpose, we utilize a relatively new concept in the Cloud computing called "Data Provenance". Our scheme is capable to reduce the need of any third party services, additional hardware support and the replication of data items on client side for integrity checking.

  8. Stakeout surveys for check dams in gullied areas by using the FreeXSap photogrammetric method

    Science.gov (United States)

    Castillo, Carlos; Marín-Moreno, Víctor; Taguas, Encarnación V.

    2017-04-01

    Prior to any check dam construction work, it is necessary to carry out field stakeout surveys to define the layout of the dam series according to spacing criteria. While in expensive and complex settings, accurate measurement techniques might be justified (e.g. differential GPS), for small to medium-sized check dams typical of areas affected by gully erosion, simpler methodologies might be more cost-efficient. Innovative 3D photogrammetric techniques based on Structure-from-Motion (SfM) algorithms have proved to be useful across different geomorphological applications and have been successfully applied for gully assessment. In this communication, we present an efficient methodology consisting of the application of a free interface for photogrammetric reconstruction (FreeXSap) combined with simple distance measurements to obtain channel cross-sections determining the width and height of the check dam for a particular cross-section. We will illustrate its use for a hundred-meter-long gully under conventional agriculture in Córdoba (Spain). FreeXSap is an easy-to-use graphical user interface written in Matlab Code (Mathworks, 2016) for the reconstruction of 3D models from image sets taken with digital consumer-grade cameras. The SfM algorithms are based on MicMac scripts (Pierrot-Deseilligny and Cléry, 2011) along with routines specifically developed for the orientation, determination and geometrical analysis of cross-sections. It only requires the collection of a few pictures of a channel cross-section (normally below 5) by the camera operator to build an accurate 3D model, while a second operator holds a pole in vertical position (with the help of a bubble level attached to the pole) in order to provide orientation and scale for further processing. The spacing between check dams was determined using the head-to-toe rule by using a clinometer App on a Smartphone. In this work we will evaluate the results of the application of this methodology in terms of time and

  9. Model Checking Geographically Distributed Interlocking Systems Using UMC

    DEFF Research Database (Denmark)

    Fantechi, Alessandro; Haxthausen, Anne Elisabeth; Nielsen, Michel Bøje Randahl

    2017-01-01

    The current trend of distributing computations over a network is here, as a novelty, applied to a safety critical system, namely a railway interlocking system. We show how the challenge of guaranteeing safety of the distributed application has been attacked by formally specifying and model checking...... the relevant distributed protocols. By doing that we obey the safety guidelines of the railway signalling domain, that require formal methods to support the certification of such products. We also show how formal modelling can help designing alternative distributed solutions, while maintaining adherence...

  10. Model-Checking Linear-Time Properties of Quantum Systems

    CERN Document Server

    Ying, Mingsheng; Yu, Nengkun; Feng, Yuan

    2011-01-01

    We define a formal framework for reasoning about linear-time properties of quantum systems in which quantum automata are employed in the modeling of systems and certain closed subspaces of state (Hilbert) spaces are used as the atomic propositions about the behavior of systems. We provide an algorithm for verifying invariants of quantum automata. Then automata-based model-checking technique is generalized for the verification of safety properties recognizable by reversible automata and omega-properties recognizable by reversible Buechi automata.

  11. Daily check of the electron beams with a diode system

    Energy Technology Data Exchange (ETDEWEB)

    Pilette, P. [Hospital Civil de Charleroi (Belgium). Centre for Radiotherapy

    1995-12-01

    A fast systems to check all the accelerator beams on a daily basis has been developed. A cheap home-made detector, based on non-medical diodes (type 1N5408), has been used since July 1992 to verify all the electron beams every day. The relative energy and Top-cGy correspondence is verified with one single irradiation of less than 1 minute by 6 diodes fixed in a polystyrene phantom. The principle of construction, software implementation and results are presented.

  12. Energy Audit Checks - A socioeconomic assessment; Energikartlaeggningscheckar - En samhaellsekonomisk utvaerdering

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2013-09-01

    This review is part of the Swedish Energy Agency's work with skills and methodology development on economic analyzes. The present socioeconomic analysis is the first of its kind to evaluate the current support for energy audit checks and is based on the instrument's purpose, goals and obstacles. Cost effectiveness is the main focus, as well as a description of the instrument's benefits and costs. The evaluation also aims to further develop the instrument in conjunction with the implementation of energy efficiency directive. Proposals for new instruments have however not been part of the mission.

  13. [Discharge of very preterm infants from neonatology: check list].

    Science.gov (United States)

    Arnaud, F

    2004-02-01

    Key elements of the check list for neonatal discharge include: discharge discussion with parents, relation with maternal and child welfare assistants and family practitioner, scheduling of follow-up visits, request for insurance coverage, parental presence allowance, special education allowance, debriefing with nurses and nurses providers, clinical and biological appraisal, discharge prescription. For a former extremely premature baby, going home - often after a long hospitalization and a variety of pathologic problems - must be prepared and should not be decided in haste, not only for the baby and his/her parents, but also. for the neonatal staff!

  14. Astronaut Charles Conrad checks out Human Vestibular Function experiment

    Science.gov (United States)

    1973-01-01

    Astronaut Charles Conrad Jr., commander of the first manned Skylab mission, checks out the Human Vestibular Function, Experiment M131, during Skylab training at JSC. Conrad is in the work and experiments compartment of the crew quarters of the Skylab Orbital Workshop (OWS) trainer at JSC. The reference sphere with a magnetic rod is used by the astronaut to indicate body orientation non-visually. The litter chair in which he is seated can be rotated by a motor at its base or, when not being rotated, can tilt forward, backward or to either side.

  15. Android Security (Decompilation of APK File to Check Permissions

    Directory of Open Access Journals (Sweden)

    Hemant Bansal

    2016-01-01

    Full Text Available The world wide revolution in Android technology is changing our lives in term of the way we learn and use. Android Security fits into this because the technology has been around long enough and can provide various benefits for security in this area. The main objective of this paper is to Decompile the Android App And Check the permissions Used By That App (What The permissions any app is accessing Like reading messages, Using our internet data, reading our call logs. This Research Paper Helps Peoples To aware About the Un necessary Applications and Their Permissions That Are in Our Phone Stealing Our Credit Card details, secret details etc.

  16. Introduction of Virtualization Technology to Multi-Process Model Checking

    Science.gov (United States)

    Leungwattanakit, Watcharin; Artho, Cyrille; Hagiya, Masami; Tanabe, Yoshinori; Yamamoto, Mitsuharu

    2009-01-01

    Model checkers find failures in software by exploring every possible execution schedule. Java PathFinder (JPF), a Java model checker, has been extended recently to cover networked applications by caching data transferred in a communication channel. A target process is executed by JPF, whereas its peer process runs on a regular virtual machine outside. However, non-deterministic target programs may produce different output data in each schedule, causing the cache to restart the peer process to handle the different set of data. Virtualization tools could help us restore previous states of peers, eliminating peer restart. This paper proposes the application of virtualization technology to networked model checking, concentrating on JPF.

  17. Gut Check: The evolution of an educational board game.

    Science.gov (United States)

    Coil, David A; Ettinger, Cassandra L; Eisen, Jonathan A

    2017-04-01

    The "gamification" of science has gained a lot of traction in recent years, and games that convey scientific concepts or themes are increasingly popular. While a number of existing games touch on microbiology, very few consider the beneficial (as opposed to the detrimental) aspects of microbes. We designed a board game called "Gut Check: The Microbiome Game" to fill this gap. The game is meant to be both educational as well as challenging and fun. Here we discuss the development of the game, some of the logistics of game development in this context, and offer suggestions for others thinking of similar projects.

  18. Modelling Chinese Smart Grid: A Stochastic Model Checking Case Study

    CERN Document Server

    Yüksel, Ender; Nielson, Flemming; Zhu, Huibiao; Huang, Heqing

    2012-01-01

    Cyber-physical systems integrate information and communication technology functions to the physical elements of a system for monitoring and controlling purposes. The conversion of traditional power grid into a smart grid, a fundamental example of a cyber-physical system, raises a number of issues that require novel methods and applications. In this context, an important issue is the verification of certain quantitative properties of the system. In this technical report, we consider a specific Chinese Smart Grid implementation and try to address the verification problem for certain quantitative properties including performance and battery consumption. We employ stochastic model checking approach and present our modelling and analysis study using PRISM model checker.

  19. Injection Beam Loss and Beam Quality Checks for the LHC

    CERN Document Server

    Kain, Verena; Bartmann, Wolfgang; Bracco, Chiara; Drosdal, Lene; Holzer, Eva; Khasbulatov, Denis; Magnin, Nicolas; Meddahi, Malika; Nordt, Annika; Sapinski, Mariusz; Vogt, Mathias

    2010-01-01

    The quality of the injection into the LHC is monitored by a dedicated software system which acquires and analyses the pulse waveforms from the injection kickers, and measures key beam parameters and compares them with the nominal ones. The beam losses at injection are monitored on many critical devices in the injection regions, together with the longitudinal filling pattern and maximum trajectory offset on the first 100 turns. The paper describes the injection quality check system and the results from LHC beam commissioning, in particular the beam losses measured during injection at the various aperture limits. The results are extrapolated to full intensity and the consequences are discussed

  20. Optimizing ZigBee Security using Stochastic Model Checking

    DEFF Research Database (Denmark)

    Yuksel, Ender; Nielson, Hanne Riis; Nielson, Flemming

    ZigBee is a fairly new but promising wireless sensor network standard that offers the advantages of simple and low resource communication. Nevertheless, security is of great concern to ZigBee, and enhancements are prescribed in the latest ZigBee specication: ZigBee-2007. In this technical report......, we identify an important gap in the specification on key updates, and present a methodology for determining optimal key update policies and security parameters. We exploit the stochastic model checking approach using the probabilistic model checker PRISM, and assess the security needs for realistic...

  1. Model Checking Workflow Net Based on Petri Net

    Institute of Scientific and Technical Information of China (English)

    ZHOU Conghua; CHEN Zhenyu

    2006-01-01

    The soundness is a very important criterion for the correctness of the workflow.Specifying the soundness with Computation Tree Logic (CTL) allows us to verify the soundness with symbolic model checkers.Therefore the state explosion problem in verifying soundness can be overcome efficiently.When the property is not satisfied by the system,model checking can give a counter-example, which can guide us to correct the workflow.In addition, relaxed soundness is another important criterion for the workflow.We also prove that Computation Tree Logic * (CTL * ) can be used to character the relaxed soundness of the workflow.

  2. Optimizing ZigBee Security using Stochastic Model Checking

    CERN Document Server

    Yüksel, Ender; Nielson, Flemming; Fruth, Matthias; Kwiatkowska, Marta

    2012-01-01

    ZigBee is a fairly new but promising wireless sensor network standard that offers the advantages of simple and low resource communication. Nevertheless, security is of great concern to ZigBee, and enhancements are prescribed in the latest ZigBee specication: ZigBee-2007. In this technical report, we identify an important gap in the specification on key updates, and present a methodology for determining optimal key update policies and security parameters. We exploit the stochastic model checking approach using the probabilistic model checker PRISM, and assess the security needs for realistic application scenarios.

  3. Probabilistic Priority Message Checking Modeling Based on Controller Area Networks

    Science.gov (United States)

    Lin, Cheng-Min

    Although the probabilistic model checking tool called PRISM has been applied in many communication systems, such as wireless local area network, Bluetooth, and ZigBee, the technique is not used in a controller area network (CAN). In this paper, we use PRISM to model the mechanism of priority messages for CAN because the mechanism has allowed CAN to become the leader in serial communication for automobile and industry control. Through modeling CAN, it is easy to analyze the characteristic of CAN for further improving the security and efficiency of automobiles. The Markov chain model helps us to model the behaviour of priority messages.

  4. 76 FR 69287 - National Instant Criminal Background Check System Section Agency Information Collection...

    Science.gov (United States)

    2011-11-08

    ... Federal Bureau of Investigation National Instant Criminal Background Check System Section Agency Information Collection Activities: Existing collection, comments requested the Voluntary Appeal File (VAF... Criminal Justice Information Services (CJIS) Division's National Instant Criminal Background Check...

  5. 76 FR 6199 - Enhanced Weapons, Firearms Background Checks, and Security Event Notifications

    Science.gov (United States)

    2011-02-03

    ... Regulatory Commission 10 CFR Part 73 Enhanced Weapons, Firearms Background Checks, and Security Event... Enhanced Weapons, Firearms Background Checks, and Security Event Notifications AGENCY: Nuclear Regulatory... revisions in these implementing regulations that address the voluntary application for enhanced weapons and...

  6. An initial psychometric evaluation and exploratory cross-sectional study of the body checking questionnaire among Brazilian women.

    Directory of Open Access Journals (Sweden)

    Angela Nogueira Neves Betanho Campana

    Full Text Available Body checking is considered an expression of an excessive preoccupation with appearance. The first aim of this study was to evaluate the psychometric properties of a Brazilian Portuguese version of the Body Checking Questionnaire (BCQ. Additionally, we wanted to examine the questionnaire's associations with body avoidance behaviour, body mass index, dietary habits, and the intensity, frequency, and length of physical exercise. Finally, we also examined the differences between the total BCQ score and the individual BCQ factor scores. Differences between active and sedentary persons and between non-dieters and those on weight-loss diets were also analyzed. For the psychometric study, 546 female public university students from four different courses were surveyed. Two minor samples of university students and eating disorders women were also recruited. In the second part of the study, 403 women were recruited from weight-loss programs, gyms, and a university. All participants were verbally invited to participate in the research and voluntarily took part. Confirmatory factor analysis showed a good fit to the original model of the Brazilian BCQ that retained all 23 items. Satisfactory evidence of construct validity and internal consistency were also generated through analysis of factor loadings, t-values, Cronbach's alpha, and construct reliability tests. The results also showed associations among body checking and body avoidance, body satisfaction, social anxiety, body mass index, and the frequency and intensity of physical exercise. Significant differences were found between non-dieters and weight-loss dieters for all BCQ factors and the total BCQ score. For physically active and sedentary persons, a significant difference was only observed for idiosyncratic checking behaviour. In conclusion, the BCQ appears to be a valid and reliable scale for Brazilian research, and the associations and differences found in this study suggest that women at gyms

  7. SU-D-BRD-07: Automatic Patient Data Audit and Plan Quality Check to Support ARIA and Eclipse

    Energy Technology Data Exchange (ETDEWEB)

    Li, X; Li, H; Wu, Y; Mutic, S; Yang, D [Washington University School of Medicine, St. Louis, MO (United States)

    2014-06-01

    Purpose: To ensure patient safety and treatment quality in RT departments that use Varian ARIA and Eclipse, we developed a computer software system and interface functions that allow previously developed electron chart checking (EcCk) methodologies to support these Varian systems. Methods: ARIA and Eclipse store most patient information in its MSSQL database. We studied the contents in the hundreds database tables and identified the data elements used for patient treatment management and treatment planning. Interface functions were developed in both c-sharp and MATLAB to support data access from ARIA and Eclipse servers using SQL queries. These functions and additional data processing functions allowed the existing rules and logics from EcCk to support ARIA and Eclipse. Dose and structure information are important for plan quality check, however they are not stored in the MSSQL database but as files in Varian private formats, and cannot be processed by external programs. We have therefore implemented a service program, which uses the DB Daemon and File Daemon services on ARIA server to automatically and seamlessly retrieve dose and structure data as DICOM files. This service was designed to 1) consistently monitor the data access requests from EcCk programs, 2) translate the requests for ARIA daemon services to obtain dose and structure DICOM files, and 3) monitor the process and return the obtained DICOM files back to EcCk programs for plan quality check purposes. Results: EcCk, which was previously designed to only support MOSAIQ TMS and Pinnacle TPS, can now support Varian ARIA and Eclipse. The new EcCk software has been tested and worked well in physics new start plan check, IMRT plan integrity and plan quality checks. Conclusion: Methods and computer programs have been implemented to allow EcCk to support Varian ARIA and Eclipse systems. This project was supported by a research grant from Varian Medical System.

  8. 28 CFR 105.23 - Procedure for requesting criminal history record check.

    Science.gov (United States)

    2010-07-01

    ... HISTORY BACKGROUND CHECKS Private Security Officer Employment § 105.23 Procedure for requesting criminal... checks, declaring that it is an authorized employer that employs private security officers; that all fingerprints and requests for criminal history background checks are being submitted for private...

  9. 12 CFR 210.12 - Return of cash items and handling of returned checks.

    Science.gov (United States)

    2010-01-01

    ... information portion of the item contains a record of all MICR-line information required for a substitute check... the item contains a record of all MICR-line information required for a substitute check under § 229.2... the item contains a record of all MICR-line information required for a substitute check under § 229.2...

  10. High pressure check valve for application in a miniature cryogenic scorption cooler

    NARCIS (Netherlands)

    Burger, J.F.; Wekken, van der M.C.; Berenschot, E.; Holland, H.J.; Brake, ter H.J.M.; Rogalla, H.; Gardeniers, J.G.E.; Elwenspoek, M.

    1999-01-01

    This paper presents a check valve with integrated filter that can stand gas pressures of more than 100 bar in the closed direction and which has a very low pressure drop at low absolute gas pressures in the forward direction. The check valve is designed as a part of a check valve unit for applicatio

  11. Assessing Personality and Mood With Adjective Check List Methodology: A Review

    Science.gov (United States)

    Craig, Robert J.

    2005-01-01

    This article addresses the benefits and problems in using adjective check list methodology to assess personality. Recent developments in this assessment method are reviewed, emphasizing seminal adjective-based personality tests (Gough's Adjective Check List), mood tests (Lubin's Depressive Adjective Test, Multiple Affect Adjective Check List),…

  12. 77 FR 38714 - Proposed Collection; Comment Request for the TE/GE Compliance Check Questionnaires

    Science.gov (United States)

    2012-06-28

    ... Internal Revenue Service Proposed Collection; Comment Request for the TE/GE Compliance Check Questionnaires... Compliance Check Questionnaires. DATES: Written comments should be received on or before August 27, 2012 to... INFORMATION: Title: TE/GE Compliance Check Questionnaires. OMB Number: 1545-2071. Form Number: Not applicable...

  13. 42 CFR 457.216 - Treatment of uncashed or canceled (voided) CHIP checks.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 4 2010-10-01 2010-10-01 false Treatment of uncashed or canceled (voided) CHIP... canceled (voided) CHIP checks. (a) Purpose. This section provides rules to ensure that States refund the... section— Canceled (voided) check means an CHIP check issued by a State or fiscal agent that prior to...

  14. 30 CFR 75.902-1 - Maximum voltage ground check circuits.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Maximum voltage ground check circuits. 75.902-1... Alternating Current Circuits § 75.902-1 Maximum voltage ground check circuits. The maximum voltage used for such ground check circuits shall not exceed 40 volts....

  15. 30 CFR 75.803-1 - Maximum voltage ground check circuits.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Maximum voltage ground check circuits. 75.803-1 Section 75.803-1 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR COAL MINE... § 75.803-1 Maximum voltage ground check circuits. The maximum voltage used for ground check...

  16. Efficient Parallel Statistical Model Checking of Biochemical Networks

    Directory of Open Access Journals (Sweden)

    Paolo Ballarini

    2009-12-01

    Full Text Available We consider the problem of verifying stochastic models of biochemical networks against behavioral properties expressed in temporal logic terms. Exact probabilistic verification approaches such as, for example, CSL/PCTL model checking, are undermined by a huge computational demand which rule them out for most real case studies. Less demanding approaches, such as statistical model checking, estimate the likelihood that a property is satisfied by sampling executions out of the stochastic model. We propose a methodology for efficiently estimating the likelihood that a LTL property P holds of a stochastic model of a biochemical network. As with other statistical verification techniques, the methodology we propose uses a stochastic simulation algorithm for generating execution samples, however there are three key aspects that improve the efficiency: first, the sample generation is driven by on-the-fly verification of P which results in optimal overall simulation time. Second, the confidence interval estimation for the probability of P to hold is based on an efficient variant of the Wilson method which ensures a faster convergence. Third, the whole methodology is designed according to a parallel fashion and a prototype software tool has been implemented that performs the sampling/verification process in parallel over an HPC architecture.

  17. Reasoning About Strategies: On the Model-Checking Problem

    CERN Document Server

    Mogavero, Fabio; Perelli, Giuseppe; Vardi, Moshe Y

    2011-01-01

    In open systems verification, to formally check for reliability, one needs an appropriate formalism to model the interaction between agents and express the correctness of the system no matter how the environment behaves. An important contribution in this context is given by modal logics for strategic ability, in the setting of multi-agent games, such as ATL, ATL*, and the like. Recently, Chatterjee, Henzinger, and Piterman introduced Strategy Logic (CHP-SL), with the aim of getting a powerful framework for reasoning explicitly about strategies. CHP-SL is obtained by using first-order quantifications over strategies and it has been investigated in the setting of two-agents turned-based games, where a non-elementary model-checking algorithm has been provided. While CHP-SL is a very expressive logic, we claim that it does not fully capture the strategic aspects of multi-agent systems. In this paper, we introduce and study a more general strategy logic, denoted SL, for reasoning about strategies in multi-agent co...

  18. Model-checking techniques based on cumulative residuals.

    Science.gov (United States)

    Lin, D Y; Wei, L J; Ying, Z

    2002-03-01

    Residuals have long been used for graphical and numerical examinations of the adequacy of regression models. Conventional residual analysis based on the plots of raw residuals or their smoothed curves is highly subjective, whereas most numerical goodness-of-fit tests provide little information about the nature of model misspecification. In this paper, we develop objective and informative model-checking techniques by taking the cumulative sums of residuals over certain coordinates (e.g., covariates or fitted values) or by considering some related aggregates of residuals, such as moving sums and moving averages. For a variety of statistical models and data structures, including generalized linear models with independent or dependent observations, the distributions of these stochastic processes tinder the assumed model can be approximated by the distributions of certain zero-mean Gaussian processes whose realizations can be easily generated by computer simulation. Each observed process can then be compared, both graphically and numerically, with a number of realizations from the Gaussian process. Such comparisons enable one to assess objectively whether a trend seen in a residual plot reflects model misspecification or natural variation. The proposed techniques are particularly useful in checking the functional form of a covariate and the link function. Illustrations with several medical studies are provided.

  19. Development of a stainless steel check valve for cryogenic applications

    Science.gov (United States)

    Veenstra, T. T.; Venhorst, G. C. F.; Burger, J. F.; Holland, H. J.; ter Brake, H. J. M.; Sirbi, A.; Rogalla, H.

    2007-02-01

    This paper describes the development of a check valve for use in a sorption compressor that will drive a 10 mW 4.5 K Joule-Thomson cryocooler. For the check valve extremely low backflow rates are tolerable at an operating temperature of the valve of 50 K. To fulfill these requirements, the sealing mechanism of the valve is based on a full metal to metal contact. In order to obtain sufficiently low leak rates, both parts were machined to a surface flatness in the order of 100 nm. In addition, the closing plate (boss) of the valve deforms (bends) slightly under pressure, forming itself to the opposite valve seat and thus reducing the gap between these parts. The measured leak flow at 50 K was 1.6 μg/s helium @ 16 bar pressure difference, which is well below the aim of 3 μg/s. The valve was subjected to an accelerated lifetime test of 300,000 cycles. It was observed that the leak flow through the valve during this test steadily decreased to a level of 0.15 μg/s after 100,000 cycles.

  20. Stat-LRC: statistical rules check for variational lithography

    Science.gov (United States)

    Sreedhar, Aswin; Kundu, Sandip

    2010-03-01

    As interconnect densities increase with each technology generation, the lithographic processes required to print all features with acceptable irregularities have become more complex. Restricted design rules (RDR) and modelbased Design for Manufacturability (DFM) guidelines have been added to the existing Design Rule Check (DRC) software to prevent unprintable patterns to be drawn on the mask by predicting their imprint on the wafer. It is evident from analyses of predicted patterns that edge placement errors have a continuous distribution, hence a pass/fail cut-off is somewhat arbitrary. In this paper, we describe a methodology to perform Statistical Lithography Rules Check (Stat-LRC) involving design yield based on interconnect linewidth distribution for variation in lithographic input error sources. In this scheme, a list of error locations indicating polygons that have yield below a user specified threshold are listed. The overall design yield is recovered by trading-off slightly poorer EPE distributions for lines with short runs with excellent ones. The simulation/analysis environment is fully automated and yield recovery improvement has been demonstrated.

  1. Tarmo: A Framework for Parallelized Bounded Model Checking

    CERN Document Server

    Wieringa, Siert; Heljanko, Keijo; 10.4204/EPTCS.14.5

    2009-01-01

    This paper investigates approaches to parallelizing Bounded Model Checking (BMC) for shared memory environments as well as for clusters of workstations. We present a generic framework for parallelized BMC named Tarmo. Our framework can be used with any incremental SAT encoding for BMC but for the results in this paper we use only the current state-of-the-art encoding for full PLTL. Using this encoding allows us to check both safety and liveness properties, contrary to an earlier work on distributing BMC that is limited to safety properties only. Despite our focus on BMC after it has been translated to SAT, existing distributed SAT solvers are not well suited for our application. This is because solving a BMC problem is not solving a set of independent SAT instances but rather involves solving multiple related SAT instances, encoded incrementally, where the satisfiability of each instance corresponds to the existence of a counterexample of a specific length. Our framework includes a generic architecture for a ...

  2. Model Checking Degrees of Belief in a System of Agents

    Science.gov (United States)

    Raimondi, Franco; Primero, Giuseppe; Rungta, Neha

    2014-01-01

    Reasoning about degrees of belief has been investigated in the past by a number of authors and has a number of practical applications in real life. In this paper we present a unified framework to model and verify degrees of belief in a system of agents. In particular, we describe an extension of the temporal-epistemic logic CTLK and we introduce a semantics based on interpreted systems for this extension. In this way, degrees of beliefs do not need to be provided externally, but can be derived automatically from the possible executions of the system, thereby providing a computationally grounded formalism. We leverage the semantics to (a) construct a model checking algorithm, (b) investigate its complexity, (c) provide a Java implementation of the model checking algorithm, and (d) evaluate our approach using the standard benchmark of the dining cryptographers. Finally, we provide a detailed case study: using our framework and our implementation, we assess and verify the situational awareness of the pilot of Air France 447 flying in off-nominal conditions.

  3. Model-Checking with Edge-Valued Decision Diagrams

    Science.gov (United States)

    Roux, Pierre; Siminiceanu, Radu I.

    2010-01-01

    We describe an algebra of Edge-Valued Decision Diagrams (EVMDDs) to encode arithmetic functions and its implementation in a model checking library along with state-of-the-art algorithms for building the transition relation and the state space of discrete state systems. We provide efficient algorithms for manipulating EVMDDs and give upper bounds of the theoretical time complexity of these algorithms for all basic arithmetic and relational operators. We also demonstrate that the time complexity of the generic recursive algorithm for applying a binary operator on EVMDDs is no worse than that of Multi-Terminal Decision Diagrams. We have implemented a new symbolic model checker with the intention to represent in one formalism the best techniques available at the moment across a spectrum of existing tools: EVMDDs for encoding arithmetic expressions, identity-reduced MDDs for representing the transition relation, and the saturation algorithm for reachability analysis. We compare our new symbolic model checking EVMDD library with the widely used CUDD package and show that, in many cases, our tool is several orders of magnitude faster than CUDD.

  4. Maintenance Check-ups Following Treatment for Cannabis Dependence.

    Science.gov (United States)

    Walker, Denise D; Stephens, Robert S; Towe, Sheri; Banes, Kelsey; Roffman, Roger

    2015-09-01

    Substance use disorders, including cannabis use disorders and associated negative consequences, are best considered chronic and in need of continuing care. In contrast, most treatment efficacy studies evaluate a fixed number of intervention sessions at a single point in time. The present study evaluated the efficacy of posttreatment maintenance check-ups (MCUs) in maintaining and improving outcomes following nine sessions of motivational enhancement treatment/cognitive behavioral treatment (MET/CBT). Adults dependent on cannabis (n=74) were randomly assigned to the MCU or a no check-up (NCU) condition and followed up at 3- and 9-months. MCU sessions occurred 1 and 4months following the completion of the base treatment. Additional MET/CBT sessions were available to participants throughout the follow-up period. The MCUs specifically encouraged treatment re-entry for those showing ongoing signs of disorder. Participants in the MCU condition reported significantly greater abstinent rates at both follow-ups and were using on fewer days at the 3-month but not the 9-month follow-up. Contrary to hypotheses, MCU participants did not attend more additional treatment and differences in rates of cannabis use emerged prior to the first MCU session. Future research with longer follow-up periods and longer monitoring of outcomes is needed to fully evaluate the utility of MCUs or other forms of continuing care.

  5. New results on pushdown module checking with imperfect information

    CERN Document Server

    Bozzelli, Laura

    2011-01-01

    Model checking of open pushdown systems (OPD) w.r.t. standard branching temporal logics (pushdown module checking or PMC) has been recently investigated in the literature, both in the context of environments with perfect and imperfect information about the system (in the last case, the environment has only a partial view of the system's control states and stack content). For standard CTL, PMC with imperfect information is known to be undecidable. If the stack content is assumed to be visible, then the problem is decidable and 2EXPTIME-complete (matching the complexity of PMC with perfect information against CTL). The decidability status of PMC with imperfect information against CTL restricted to the case where the depth of the stack content is visible is open. In this paper, we show that with this restriction, PMC with imperfect information against CTL remains undecidable. On the other hand, we individuate an interesting subclass of OPDS with visible stack content depth such that PMC with imperfect informatio...

  6. SoS contract verification using statistical model checking

    Directory of Open Access Journals (Sweden)

    Alessandro Mignogna

    2013-11-01

    Full Text Available Exhaustive formal verification for systems of systems (SoS is impractical and cannot be applied on a large scale. In this paper we propose to use statistical model checking for efficient verification of SoS. We address three relevant aspects for systems of systems: 1 the model of the SoS, which includes stochastic aspects; 2 the formalization of the SoS requirements in the form of contracts; 3 the tool-chain to support statistical model checking for SoS. We adapt the SMC technique for application to heterogeneous SoS. We extend the UPDM/SysML specification language to express the SoS requirements that the implemented strategies over the SoS must satisfy. The requirements are specified with a new contract language specifically designed for SoS, targeting a high-level English- pattern language, but relying on an accurate semantics given by the standard temporal logics. The contracts are verified against the UPDM/SysML specification using the Statistical Model Checker (SMC PLASMA combined with the simulation engine DESYRE, which integrates heterogeneous behavioral models through the functional mock-up interface (FMI standard. The tool-chain allows computing an estimation of the satisfiability of the contracts by the SoS. The results help the system architect to trade-off different solutions to guide the evolution of the SoS.

  7. On consistent truncations in ${\\cal N}=2^*$ holography

    CERN Document Server

    Balasubramanian, Venkat

    2013-01-01

    Although Pilch-Warner (PW) gravitational renormalization group flow [arXiv:hep-th/0004063] passes a number of important consistency checks to be identified as a holographic dual to a large-$N$ $SU(N)$ ${\\cal N}=2^*$ supersymmetric gauge theory, it fails to reproduce the free energy of the theory on $S^4$, computed with the localization techniques. This disagreement points to the existence of a larger dual gravitational consistent truncation, which in the gauge theory flat-space limit reduces to a PW flow. Such truncation was recently identified by Bobev-Elvang-Freedman-Pufu (BEFP) [arXiv:1311.1508]. Additional bulk scalars of the BEFP gravitation truncation might lead to destabilization of the finite-temperature deformed PW flows, and thus modify the low-temperature thermodynamics and hydrodynamics of ${\\cal N} =2^*$ plasma. We compute the quasinormal spectrum of these bulk scalar fields in the thermal PW flows and demonstrate that these modes do not condense, as long as the masses of the ${\\cal N}=2^*$ hyper...

  8. A Monte Carlo study to check the hadronic interaction models by a new EAS hybrid experiment in Tibet

    CERN Document Server

    Zhang, Ying; Jiang, L; Chen, D; Ding, L K; Shibata, M; Katayose, Y; Hotta, N; Ohnishi, M; Ouchi, T; Saito, T

    2013-01-01

    A new EAS hybrid experiment has been designed by constructing a YAC (Yangbajing Air shower Core) detector array inside the existing Tibet-III air shower array. The first step of YAC, called "YAC-I", consists of 16 plastic scintillator units (4 rows times 4 columns) each with an area of 40 cm * 50 cm which is used to check hadronic interaction models used in AS simulations. A Monte Carlo study shows that YAC-I can record high energy electromagnetic component in the core region of air showers induced by primary particles of several tens TeV energies where the primary composition is directly measured by space experiments. It may provide a direct check of the hadronic interaction models currently used in the air shower simulations in the corresponding energy region. In present paper, the method of the observation and the sensitivity of the characteristics of the observed events to the different interaction models are discussed.

  9. Consistent Design of Dependable Control Systems

    DEFF Research Database (Denmark)

    Blanke, M.

    1996-01-01

    Design of fault handling in control systems is discussed, and a method for consistent design is presented.......Design of fault handling in control systems is discussed, and a method for consistent design is presented....

  10. A check list of the spiders of the Kruger National Park, South Africa (Arachnida: Araneae

    Directory of Open Access Journals (Sweden)

    A.S. Dippenaar-Schoeman

    2003-12-01

    Full Text Available As part of the South African National Survey of Arachnida (SANSA, projects are underway to determine the biodiversity of arachnids present in protected areas in South Africa. Spiders have been collected over a period of 16 years from the Kruger National Park, South Africa. A check list is provided consisting of 152 species, 116 genera and 40 families. This represents about 7.6 % of the total known South African spider fauna. Of the 152 species, 103 are new records for the park. The ground dwelling spiders comprise 58 species from 25 families. Of these, 21 % are web dwellers and 62 % free living, while 17 % live in burrows. From the plant layer, 94 species have been collected of which 53 % were web builders and 47 % free living wandering spiders.

  11. Check your biosignals here: a new dataset for off-the-person ECG biometrics.

    Science.gov (United States)

    da Silva, Hugo Plácido; Lourenço, André; Fred, Ana; Raposo, Nuno; Aires-de-Sousa, Marta

    2014-02-01

    The Check Your Biosignals Here initiative (CYBHi) was developed as a way of creating a dataset and consistently repeatable acquisition framework, to further extend research in electrocardiographic (ECG) biometrics. In particular, our work targets the novel trend towards off-the-person data acquisition, which opens a broad new set of challenges and opportunities both for research and industry. While datasets with ECG signals collected using medical grade equipment at the chest can be easily found, for off-the-person ECG data the solution is generally for each team to collect their own corpus at considerable expense of resources. In this paper we describe the context, experimental considerations, methods, and preliminary findings of two public datasets created by our team, one for short-term and another for long-term assessment, with ECG data collected at the hand palms and fingers.

  12. Completeness and consistency of renormalisation group flows

    CERN Document Server

    Litim, Daniel F; Litim, Daniel F.; Pawlowski, Jan M.

    2002-01-01

    We study different renormalisation group flows for scale dependent effective actions, including exact and proper-time renormalisation group flows. These flows have a simple one loop structure. They differ in their dependence on the full field-dependent propagator, which is linear for exact flows. We investigate the inherent approximations of flows with a non-linear dependence on the propagator. We check explicitly that standard perturbation theory is not reproduced. We explain the origin of the discrepancy by providing links to exact flows both in closed expressions and in given approximations. We show that proper-time flows are approximations to Callan-Symanzik flows. Within a background field formalism, we provide a generalised proper-time flow, which is exact. Implications of these findings are discussed.

  13. Using Hybrid Decision Tree -Houph Transform Approach For Automatic Bank Check Processing

    Directory of Open Access Journals (Sweden)

    Heba A. Elnemr

    2012-05-01

    Full Text Available One of the first steps in the realization of an automatic system of bank check processing is the automatic classification of checks and extraction of handwritten area. This paper presents a new hybrid method which couple together the statistical color histogram features, the entropy, the energy and the Houph transform to achieve the automatic classification of checks as well as the segmentation and recognition of the various information on the check. The proposed method relies on two stages. First, a two-step classification algorithm is implemented. In the first step, a decision classification tree is built using the entropy, the energy, the logo location and histogram features of colored bank checks. These features are used to classify checks into several groups. Each group may contain one or more type of checks. Therefore, in the second step the bank logo or bank name are matched against its stored template to identify the correct prototype. Second, Hough transform is utilized to detect lines in the classified checks. These lines are used as indicator to the bank check fields. A group of experiments is performed showing that the proposed technique is promising as regards classifying the bank checks and extracting the important fields in that check.

  14. Member Checking: A Tool to Enhance Trustworthiness or Merely a Nod to Validation?

    Science.gov (United States)

    Birt, Linda; Scott, Suzanne; Cavers, Debbie; Campbell, Christine; Walter, Fiona

    2016-06-22

    The trustworthiness of results is the bedrock of high quality qualitative research. Member checking, also known as participant or respondent validation, is a technique for exploring the credibility of results. Data or results are returned to participants to check for accuracy and resonance with their experiences. Member checking is often mentioned as one in a list of validation techniques. This simplistic reporting might not acknowledge the value of using the method, nor its juxtaposition with the interpretative stance of qualitative research. In this commentary, we critique how member checking has been used in published research, before describing and evaluating an innovative in-depth member checking technique, Synthesized Member Checking. The method was used in a study with patients diagnosed with melanoma. Synthesized Member Checking addresses the co-constructed nature of knowledge by providing participants with the opportunity to engage with, and add to, interview and interpreted data, several months after their semi-structured interview. © The Author(s) 2016.

  15. Loess Plateau check dams can potentially sequester eroded soil organic carbon

    Science.gov (United States)

    Zhang, Haicheng; Liu, Shuguang; Yuan, Wenping; Dong, Wenjie; Xia, Jiangzhou; Cao, Yaojun; Jia, Yanwei

    2016-06-01

    Check dams are special soil and water conservation structures in the Loess Plateau, China. They play an important role in intercepting sediments and soil organic carbon (SOC). However, the decomposition of intercepted SOC and the environmental regulations at check dams have not been investigated. We conducted several paired field experiments at both check dams and slope lands in the Yanhe Watershed of the Loess Plateau to examine the characteristics of SOC decomposition at check dams. On average, the SOC mineralization rate in slope lands was approximately three times higher than in check dams. Increased soil moisture and compaction in check dams can constrain carbon mineralization by limiting the oxygen availability of SOC and can isolate substrate carbon from heterotrophic microorganisms. Our results indicate that check dams display a considerable potential for eroded SOC sequestration via reducing the soil respiration rate and highlight the important implications of lateral carbon redistribution and human engineering projects when estimating regional or global ecosystem carbon cycles.

  16. Checking the new IRI model The bottomside B parameters

    CERN Document Server

    Mosert, M; Ezquer, R; Lazo, B; Miro, G

    2002-01-01

    Electron density profiles obtained at Pruhonice (50.0, 15.0), El Arenosillo (37.1, 353.2) and Havana (23, 278) were used to check the bottom-side B parameters BO (thickness parameter) and B1 (shape parameter) predicted by the new IRI - 2000 version. The electron density profiles were derived from ionograms using the ARP technique. The data base includes daytime and nighttime ionograms recorded under different seasonal and solar activity conditions. Comparisons with IRI predictions were also done. The analysis shows that: a) The parameter B1 given by IRI 2000 reproduces better the observed ARP values than the IRI-90 version and b) The observed BO values are in general well reproduced by both IRI versions: IRI-90 and IRI-2000.

  17. Applying Model Checking to Industrial-Sized PLC Programs

    CERN Document Server

    AUTHOR|(CDS)2079190; Darvas, Daniel; Blanco Vinuela, Enrique; Tournier, Jean-Charles; Bliudze, Simon; Blech, Jan Olaf; Gonzalez Suarez, Victor M

    2015-01-01

    Programmable logic controllers (PLCs) are embedded computers widely used in industrial control systems. Ensuring that a PLC software complies with its specification is a challenging task. Formal verification has become a recommended practice to ensure the correctness of safety-critical software but is still underused in industry due to the complexity of building and managing formal models of real applications. In this paper, we propose a general methodology to perform automated model checking of complex properties expressed in temporal logics (\\eg CTL, LTL) on PLC programs. This methodology is based on an intermediate model (IM), meant to transform PLC programs written in various standard languages (ST, SFC, etc.) to different modeling languages of verification tools. We present the syntax and semantics of the IM and the transformation rules of the ST and SFC languages to the nuXmv model checker passing through the intermediate model. Finally, two real cases studies of \\CERN PLC programs, written mainly in th...

  18. Using Model Checking for Analyzing Distributed Power Control Problems

    Directory of Open Access Journals (Sweden)

    Thomas Brihaye

    2010-01-01

    Full Text Available Model checking (MC is a formal verification technique which has been known and still knows a resounding success in the computer science community. Realizing that the distributed power control (PC problem can be modeled by a timed game between a given transmitter and its environment, the authors wanted to know whether this approach can be applied to distributed PC. It turns out that it can be applied successfully and allows one to analyze realistic scenarios including the case of discrete transmit powers and games with incomplete information. The proposed methodology is as follows. We state some objectives a transmitter-receiver pair would like to reach. The network is modeled by a game where transmitters are considered as timed automata interacting with each other. The objectives are then translated into timed alternating-time temporal logic formulae and MC is exploited to know whether the desired properties are verified and determine a winning strategy.

  19. Advanced Microbial Check Valve development. [for Space Shuttle

    Science.gov (United States)

    Colombo, G. V.; Greenley, D. R.; Putnam, D. F.; Sauer, R. L.

    1981-01-01

    The Microbial Check Valve (MCV) is a flight qualified assembly that provides bacteriologically safe drinking water for the Space Shuttle. The 1-lb unit is basically a canister packed with an iodinated ion-exchange resin. The device is used to destroy organisms in a water stream as the water passes through it. It is equally effective for fluid flow in either direction and its primary method of disinfection is killing rather than filtering. The MCV was developed to disinfect the fuel cell water and to prevent back contamination of stored potable water on the Space Shuttle. This paper reports its potential for space applications beyond the basic Shuttle mission. Data are presented that indicate the MCV is suitable for use in advanced systems that NASA has under development for the reclamation of humidity condensate, wash water and human urine.

  20. Deterministic and Probabilistic Approach in Primality Checking for RSA Algorithm

    Directory of Open Access Journals (Sweden)

    Sanjoy Das

    2013-04-01

    Full Text Available The RSA cryptosystem, invented by Ron Rivest, Adi Shamir and Len Adleman was first publicized in the August 1977 issue of Scientific American [1]. The security level of this algorithm very much depends on two large prime numbers [2]. In this paper two distinct approaches have been dealt with for primality checking. These are deterministic approach and probabilistic approach. For the deterministic approach, it has chosen modified trial division and for probabilistic approach, Miller-Rabin algorithm is considered. The different kinds of attacks on RSA and their remedy are also being discussed. This includes the chosen cipher text attacks, short private key exponent attack and frequency attack. Apart from these attacks, discussion has been made on how to choose the primes for the RSA algorithm. The time complexity has been demonstrated for the various algorithms implemented and compared with others. Finally the future modifications and expectations arising out of the current limitations have also been stated at the end.