WorldWideScience

Sample records for analyzing one-way experiments

  1. Comment on 'A one-way speed of light experiment'

    OpenAIRE

    de Abreu, Rodrigo; Guerra, Vasco

    2009-01-01

    A recent paper published in Am. J. Phys. describes an experiment designed to measure the one-way speed of light. Although the experiment is very interesting, in particular to be used in student laboratories, it is in fact determining the two-way speed of light.

  2. Analysis of the circular track experiment measuring the one-way speed of light

    OpenAIRE

    Philip, Evan John

    2012-01-01

    All experiments attempting to verify the invariance of speed of light directly are based on two-way speed measurement. The challenge in one-way speed measurement, the requirement of spatially separated synchronised clocks, can be possibly circumvented by measuring the speed of light travelling in a closed path. An apparent violation of the invariance principle has been recently reported in the first experiment attempting to measure the one-way speed of light utilising this concept. This exper...

  3. One-way return-link Doppler navigation with the Tracking and Data Satellite System (TDRSS) - The ultrastable oscillator (USO) experiment on the Cosmic Background Explorer (COBE)

    Science.gov (United States)

    Dunham, J. B.; Nemesure, M.; Teles, J.; Brown-Conwell, E. R.; Jackson, J. A.; Reamy, V. L.; Maher, M. J.; Elrod, B. D.

    1990-01-01

    The principal objectives of the USO experiment on the COBE spacecraft are defined, and results of space qualification studies for the COBE USO experiment are summarized. The principal objectives of the experiment are: (1) to determine flight performance of the USO coupled to the second-generation TDRSS transponder; (2) space qualify TDRSS noncoherent one-way return-link Doppler tracking; and (3) analyze algorithms for one-way navigation with real data. The three objectives of the experiment have been met in the first stage of the experiment analysis.

  4. The Roland De Witte Experiment, R. T. Cahill, and the One-Way Speed of Light (Letters to Progress in Physics

    Directory of Open Access Journals (Sweden)

    Catania J.

    2016-01-01

    Full Text Available In “The Roland De Witte 1991 Experiment (to the Memory of Roland De Witte” (Progr. Phys , 2006, v. 2(3, 60–65, R.T. Cahill gives us a briefing on his view that interferometer measurements and one-way RF coaxial cable propagation-time measure- ments amount to a detection of the anisotropy in the speed of light. However, while I obtain first order propagation delays in calculations for on e-way transit which would show geometric modulation by Earth’s rotation, I do not agree with Cahill’s simplistic equation that relates the modulation solely to the projection of the absolute velocity vector v on the coaxial cable, called v P by Cahill (ibid., p. 61–62. The reader should be warned that Cahill’s equation for ∆ t (ibid., p.63 is crude compared with a full Special Relativistic derivation.

  5. One-way radiative transfer

    Science.gov (United States)

    González-Rodríguez, Pedro; Ilan, Boaz; Kim, Arnold D.

    2016-06-01

    We introduce the one-way radiative transfer equation (RTE) for modeling the transmission of a light beam incident normally on a slab composed of a uniform forward-peaked scattering medium. Unlike the RTE, which is formulated as a boundary value problem, the one-way RTE is formulated as an initial value problem. Consequently, the one-way RTE is much easier to solve. We discuss the relation of the one-way RTE to the Fokker-Planck, small-angle, and Fermi pencil beam approximations. Then, we validate the one-way RTE through systematic comparisons with RTE simulations for both the Henyey-Greenstein and screened Rutherford scattering phase functions over a broad range of albedo, anisotropy factor, optical thickness, and refractive index values. We find that the one-way RTE gives very good approximations for a broad range of optical property values for thin to moderately thick media that have moderately to sharply forward-peaked scattering. Specifically, we show that the error made by the one-way RTE decreases monotonically as the anisotropic factor increases and as the albedo increases. On the other hand, the error increases monotonically as the optical thickness increases and the refractive index mismatch at the boundary increases.

  6. Time-transfer experiments between satellite laser ranging ground stations via one-way laser ranging to the Lunar Reconnaissance Orbiter

    Science.gov (United States)

    Mao, D.; Sun, X.; Skillman, D. R.; Mcgarry, J.; Hoffman, E.; Neumann, G. A.; Torrence, M. H.; Smith, D. E.; Zuber, M. T.

    2014-12-01

    Satellite laser ranging (SLR) has long been used to measure the distance from a ground station to an Earth-orbiting satellite in order to determine the spacecraft position in orbit, and to conduct other geodetic measurements such as plate motions. This technique can also be used to transfer time between the station and satellite, and between remote SLR sites, as recently demonstrated by the Time Transfer by Laser Link (T2L2) project by the Centre National d'Etudes Spatiaes (CNES) and Observatorire de la Cote d'Azur (OCA) as well as the Laser Time Transfer (LTT) project by the Shanghai Astronomical Observatory, where two-way and one-way measurements were obtained at the same time. Here we report a new technique to transfer time between distant SLR stations via simultaneous one-way laser ranging (LR) to the Lunar Reconnaissance Orbiter (LRO) spacecraft at lunar distance. The major objectives are to establish accurate ground station times and to improve LRO orbit determination via these measurements. The results of these simultaneous LR measurements are used to compare the SLR station times or transfer time from one to the other using times-of-flight estimated from conventional radio frequency tracking of LRO. The accuracy of the time transfer depends only on the difference of the times-of-flight from each ground station to the spacecraft, and is expected to be at sub-nano second level. The technique has been validated by both a ground-based experiment and an experiment that utilized LRO. Here we present the results to show that sub-nanosecond precision and accuracy are achievable. Both experiments were carried out between the primary LRO-LR station, The Next Generation Satellite Laser Ranging (NGSLR) station, and its nearby station, Mobile Laser System (MOBLAS-7), both at Greenbelt, Maryland. The laser transmit time from both stations were recorded by the same event timer referenced to a Hydrogen maser. The results have been compared to data from a common All

  7. One-way unlocalizable quantum discord

    Science.gov (United States)

    Xi, Zhengjun; Fan, Heng; Li, Yongming

    2012-05-01

    In this paper, we present the concept of the one-way unlocalizable quantum discord and investigate its properties. We provide a polygamy inequality for it in a tripartite pure quantum system of arbitrary dimension. Several tradeoff relations between the one-way unlocalizable quantum discord and other correlations are given. If the von Neumann measurement is made on a part of the system, we give two expressions of the one-way unlocalizable quantum discord in terms of partial distillable entanglement and quantum disturbance. Finally, we also provide a lower bound for bipartite shareability of quantum correlation beyond entanglement in a tripartite system.

  8. The one-way unlocalizable quantum discord

    CERN Document Server

    Xi, Zhengjun; Li, Yongming

    2012-01-01

    In this paper, we present the concept of the one-way unlocalizable quantum discord and investigate its properties. We provide a polygamy inequality for it in tripartite pure quantum system of arbitrary dimension. Several trade-offs between the one-way unlocalizable quantum discord and other correlations are given. If the von Neumann measurement is on a part of the system, we give two expressions of the one-way unlocalizable quantum discord in terms of partial distillable entanglement and quantum disturbance. Finally, we also provide a lower bound for bipartite shareability of quantum correlation beyond entanglement in a tripartite system.

  9. Experimental one-way quantum computing.

    Science.gov (United States)

    Walther, P; Resch, K J; Rudolph, T; Schenck, E; Weinfurter, H; Vedral, V; Aspelmeyer, M; Zeilinger, A

    2005-03-10

    Standard quantum computation is based on sequences of unitary quantum logic gates that process qubits. The one-way quantum computer proposed by Raussendorf and Briegel is entirely different. It has changed our understanding of the requirements for quantum computation and more generally how we think about quantum physics. This new model requires qubits to be initialized in a highly entangled cluster state. From this point, the quantum computation proceeds by a sequence of single-qubit measurements with classical feedforward of their outcomes. Because of the essential role of measurement, a one-way quantum computer is irreversible. In the one-way quantum computer, the order and choices of measurements determine the algorithm computed. We have experimentally realized four-qubit cluster states encoded into the polarization state of four photons. We characterize the quantum state fully by implementing experimental four-qubit quantum state tomography. Using this cluster state, we demonstrate the feasibility of one-way quantum computing through a universal set of one- and two-qubit operations. Finally, our implementation of Grover's search algorithm demonstrates that one-way quantum computation is ideally suited for such tasks.

  10. Logica's one-way VSAT system

    Science.gov (United States)

    Barrington-Cook, J. I.

    1991-01-01

    Logica has recently produced the main 'collection and forwarding' element for a comprehensive one-way VSAT system. The system is designed to utilize the extra bandwidth available from direct-to-home broadcasts using the MAC/packet television standard, in order to provide point-to-multipoint data transmission via satellite. The expectation of very large volumes of supply for standard decoders, together with the large amount of bandwidth available, suggest that extremely low cost data transmission may become available. The system is designed to provide the necessary infrastructure to allow this bulk data, low cost approach to be offered for small scale and ad-hoc data transmission.

  11. One-Way Quantum Deficit for 2 ⊗ d Systems

    Science.gov (United States)

    Ye, Biao-Liang; Fei, Shao-Ming

    2016-08-01

    We investigate one-way quantum deficit for 2 ⊗ d systems. Analytical expressions of one-way quantum deficit under both von Neumann measurement and weak measurement are presented. As an illustration, qubit-qutrit systems are studied in detail. It is shown that there exists non-zero one-way quantum deficit even quantum entanglement vanishes. Moreover, one-way quantum deficit via weak measurement turns out to be weaker than that via von Neumann measurement. The dynamics of entanglement and one-way quantum deficit under dephasing channels is also investigated.

  12. Synthetic Aperture Sonar Imaging via One-Way Wave Equations

    CERN Document Server

    Huynh, Quyen

    2009-01-01

    We develop an efficient algorithm for Synthetic Aperture Sonar imaging based on the one-way wave equations. The algorithm utilizes the operator-splitting method to integrate the one-way wave equations. The well-posedness of the one-way wave equations and the proposed algorithm is shown. A computational result against real field data is reported and the resulting image is enhanced by the BV-like regularization.

  13. Multipartite distribution property of one way discord beyond measurement

    Science.gov (United States)

    Liu, Si-Yuan; Zhang, Yu-Ran; Yang, Wen-Li; Fan, Heng

    2015-03-01

    We investigate the distribution property of one way discord in the multipartite system by introducing the concept of polygamy deficit for one way discord. The difference between one way discord and quantum discord is analogue to the one between entanglement of assistance and entanglement of formation. For tripartite pure states, two kinds of polygamy deficits are presented with the equivalent expressions and physical interpretations regardless of measurement. For four-partite pure states, we provide a condition which makes one way discord polygamy satisfied. In addition, we generalize these results to the case for N-partite pure states. Those results can be applicable to multipartite quantum systems and are complementary to our understanding of the shareability of quantum correlations.

  14. One-way Quantum Computation - a tutorial introduction

    CERN Document Server

    Browne, D E; Browne, Dan E.; Briegel, Hans J.

    2006-01-01

    In this book chapter, we provide a tutorial introduction to one-way quantum computation and many of the techniques one can use to understand it. The techniques which are described include the stabilizer formalism and the logical Heisenberg picture. We highlight ways in which it is useful to understand one-way computation beyond simple equivalence with the quantum circuit model. We briefly review current proposals of implementations and experimental progress and summarize some recent related theoretical developments. Although the chapter is primarily didactic in focus, we include a number of new methods and observations. These include: a simpler and more compact formulation of one-way quantum computation in the stabilizer formalism; A new way of implementing unitaries diagonal in the computational basis; New results on the family of operations which may be implemented in a single round of measurements; A method for constructing compact one-way patterns by decomposing unitaries in terms of diagonal unitaries an...

  15. Statistical Zero Knowledge and quantum one-way functions

    CERN Document Server

    Kashefi, E; Kashefi, Elham; Kerenidis, Iordanis

    2005-01-01

    One-way functions are a very important notion in the field of classical cryptography. Most examples of such functions, including factoring, discrete log or the RSA function, can be, however, inverted with the help of a quantum computer. In this paper, we study one-way functions that are hard to invert even by a quantum adversary and describe a set of problems which are good such candidates. These problems include Graph Non-Isomorphism, approximate Closest Lattice Vector and Group Non-Membership. More generally, we show that any hard instance of Circuit Quantum Sampling gives rise to a quantum one-way function. By the work of Aharonov and Ta-Shma, this implies that any language in Statistical Zero Knowledge which is hard-on-average for quantum computers, leads to a quantum one-way function. Moreover, extending the result of Impagliazzo and Luby to the quantum setting, we prove that quantum distributionally one-way functions are equivalent to quantum one-way functions. Last, we explore the connections between q...

  16. One-way electromagnetic waveguide using multiferroic Fibonacci superlattices

    Science.gov (United States)

    Tang, Zhenghua; Lei, Dajun; Huang, Jianquan; Jin, Gui; Qiu, Feng; Yan, Wenyan

    2015-12-01

    The multiferroic Fibonacci superlattices (MFSs) are composed of single-phase multiferroic domains with polarization and magnetization according to the rule of Fibonacci sequence. We propose to construct a one-way electromagnetic waveguide by the MFSs. The forbidden band structures of the MFSs for the forward and backward electromagnetic waves are not completely overlapped, and an obvious translation between them occurs around the fixed point ω bar = 1 with broken time-reversal and space inversion symmetries (TRSIS), which indicates the existence of one-way electromagnetic modes in the MFSs. Transmission spectrum is utilized to present this property and to indicate further one-way electromagnetic modes lying within the polaritonic band gap. The maximum forbidden bandwidth (divided by midgap frequency) of 5.4% for the backward electromagnetic wave (BEW) is found, in which the forward electromagnetic wave (FEW) can pass. The functions of one-way propagation modes and polaritonic band gap integrated into the MFSs can miniaturize the one-way photonic devices. The properties can also be applied to construct compact microwave isolators.

  17. Efficient quantum circuits for one-way quantum computing.

    Science.gov (United States)

    Tanamoto, Tetsufumi; Liu, Yu-Xi; Hu, Xuedong; Nori, Franco

    2009-03-13

    While Ising-type interactions are ideal for implementing controlled phase flip gates in one-way quantum computing, natural interactions between solid-state qubits are most often described by either the XY or the Heisenberg models. We show an efficient way of generating cluster states directly using either the imaginary SWAP (iSWAP) gate for the XY model, or the sqrt[SWAP] gate for the Heisenberg model. Our approach thus makes one-way quantum computing more feasible for solid-state devices.

  18. Urban One-way Traffic Organization and Its Evaluation

    Institute of Scientific and Technical Information of China (English)

    裴玉龙; 伊新苗

    2004-01-01

    One-way traffic organization is a direct, efficient and economic method to solve traffic congestion and expand traffic capacity. With its evolution, advantages and disadvantages introduced its setting conditions demon strated. The general method and processes are summarized in planning for urban one-way streets project, viz. in vestigation, drawing out and evaluation of project, selecting of project and beneficial analysis. Fuzzy synthetical evaluation other fields is employed to evaluate the project. Its evaluation system and method is introduced and Delphi method is adopted to obtain evaluation index. Finally, taking Harbin city as an example, the application process of above-mentioned method is illuminated. Accordingly, it is proved that the method is exercisable.

  19. One-way quantum computing in the optical frequency comb.

    Science.gov (United States)

    Menicucci, Nicolas C; Flammia, Steven T; Pfister, Olivier

    2008-09-26

    One-way quantum computing allows any quantum algorithm to be implemented easily using just measurements. The difficult part is creating the universal resource, a cluster state, on which the measurements are made. We propose a scalable method that uses a single, multimode optical parametric oscillator (OPO). The method is very efficient and generates a continuous-variable cluster state, universal for quantum computation, with quantum information encoded in the quadratures of the optical frequency comb of the OPO.

  20. Constructing a one-way hash function one-way function based on the unified Chaotic system

    Institute of Scientific and Technical Information of China (English)

    Long Min; Peng Fei; Chen Guan-Rong

    2008-01-01

    A new one-way hash function based on the unified chaotic system is constructed.With different values of a key parameter,the unified chaotic system represents different chaotic systems,based on which the one-way hash function algorithm is constructed with three round operations and an initial vector on an input message.In each round operation,the parameters are processed by three different chaotic systems generated from the unified chaotic system.Feed-forwards are used at the end of each round operation and at the end of each element of the message processing.Meanwhile,in each round operation,parameter-exchanging operations are implemented.Then,the hash value of length 160 bits is obtained from the last six parameters.Simulation and analysis both demonstrate that the algorithm has great flexibility,satisfactory hash performance,weak collision property,and high security.

  1. Quantum Digital Signature based on quantum one-way functions

    CERN Document Server

    Lü, X; L\\"u, Xin; Feng, Deng-Guo

    2004-01-01

    A quantum digital signature protocol based on quantum mechanics is proposed in this paper. The security of the protocol relies on the existence of quantum one-way functions by quantum information theorem. This protocol involves a so-called arbitrator who validates and authenticates the signed message. In this protocol, we use privacy key algorithm to ensure the security of quantum information on channel and use quantum public keys to sign message. To guarantee the authenticity of the message, a family of quantum stabilizer codes are employed. Our protocol presents a novel method to construct ultimately secure digital system in future secure communication.

  2. Dynamics of Cold Atoms Crossing a One-Way Barrier

    OpenAIRE

    Thorn, Jeremy J.; Schoene, Elizabeth A.; Li, Tao; Steck, Daniel A.

    2009-01-01

    We implemented an optical one-way potential barrier that allows ultracold $^{87}$Rb atoms to transmit through when incident on one side of the barrier but reflect from the other. This asymmetric barrier is a realization of Maxwell's demon, which can be employed to produce phase-space compression and has implications for cooling atoms and molecules not amenable to standard laser-cooling techniques. The barrier comprises two focused, Gaussian laser beams that intersect the focus of a far-off-re...

  3. One-way ANOVA based on interval information

    Science.gov (United States)

    Hesamian, Gholamreza

    2016-08-01

    This paper deals with extending the one-way analysis of variance (ANOVA) to the case where the observed data are represented by closed intervals rather than real numbers. In this approach, first a notion of interval random variable is introduced. Especially, a normal distribution with interval parameters is introduced to investigate hypotheses about the equality of interval means or test the homogeneity of interval variances assumption. Moreover, the least significant difference (LSD method) for investigating multiple comparison of interval means is developed when the null hypothesis about the equality of means is rejected. Then, at a given interval significance level, an index is applied to compare the interval test statistic and the related interval critical value as a criterion to accept or reject the null interval hypothesis of interest. Finally, the method of decision-making leads to some degrees to accept or reject the interval hypotheses. An applied example will be used to show the performance of this method.

  4. A classical one-way function to confound quantum adversaries

    CERN Document Server

    Moore, Cristopher; Vazirani, U; Moore, Cristopher; Russell, Alexander; Vazirani, Umesh

    2007-01-01

    The promise of quantum computation and its consequences for complexity-theoretic cryptography motivates an immediate search for cryptosystems which can be implemented with current technology, but which remain secure even in the presence of quantum computers. Inspired by recent negative results pertaining to the nonabelian hidden subgroup problem, we present here a classical algebraic function $f_V(M)$ of a matrix $M$ which we believe is a one-way function secure against quantum attacks. Specifically, inverting $f_V$ reduces naturally to solving a hidden subgroup problem over the general linear group (which is at least as hard as the hidden subgroup problem over the symmetric group). We also demonstrate a reduction from Graph Isomorphism to the problem of inverting $f_V$; unlike Graph Isomorphism, however, the function $f_V$ is random self-reducible and therefore uniformly hard. These results suggest that, unlike Shor's algorithm for the discrete logarithm--which is, so far, the only successful quantum attack ...

  5. One-way successive plate cross wedge rolling machine

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    In our last paper(Sci China Ser E-Tech Sci,2009,52(11):3117-3121) we designed the precision forming machine with rolling plate CWR(cross wedge rolling).This kind of machine colligates the advantages of high rigidity and small floor space for roller CWR machine and those of simple die manufacture and high precision for plate CWR machine.At the same time,it abandons the shortcomings of complex die manufacture and poor precision for roller CWR machine,and those of poor rigidity and large floor space for plate CWR machine.During rolling,the upper and lower rolling plates of the machine make reciprocating slide toward or away from each other,so the inertial forces should be overcome,which will cause great energy loss,besides,large floor space is needed when the rolled workpiece is large.In order to solve the above problems,this paper presents the one-way successive plate CWR machine,whose rolling plates need not make reciprocating slide.Hence,it has high energy utilization efficiency and production efficiency.Furthermore,the roll scale can be removed automatically.In particular,the machine can produce large axisymmetrical workpieces.

  6. Epidemic spreading on one-way-coupled networks

    Science.gov (United States)

    Wang, Lingna; Sun, Mengfeng; Chen, Shanshan; Fu, Xinchu

    2016-09-01

    Numerous real-world networks (e.g., social, communicational, and biological networks) have been observed to depend on each other, and this results in interconnected networks with different topology structures and dynamics functions. In this paper, we focus on the scenario of epidemic spreading on one-way-coupled networks comprised of two subnetworks, which can manifest the transmission of some zoonotic diseases. By proposing a mathematical model through mean-field approximation approach, we prove the global stability of the disease-free and endemic equilibria of this model. Through the theoretical and numerical analysis, we obtain interesting results: the basic reproduction number R0 of the whole network is the maximum of the basic reproduction numbers of the two subnetworks; R0 is independent of the cross-infection rate and cross contact pattern; R0 increases rapidly with the growth of inner infection rate if the inner contact pattern is scale-free; in order to eradicate zoonotic diseases from human beings, we must simultaneously eradicate them from animals; bird-to-bird infection rate has bigger impact on the human's average infected density than bird-to-human infection rate.

  7. Criteria of backscattering in chiral one-way photonic crystals

    Science.gov (United States)

    Cheng, Pi-Ju; Chang, Shu-Wei

    2016-03-01

    Optical isolators are important devices in photonic circuits. To reduce the unwanted reflection in a robust manner, several setups have been realized using nonreciprocal schemes. In this study, we show that the propagating modes in a strongly-guided chiral photonic crystal (no breaking of the reciprocity) are not backscattering-immune even though they are indeed insensitive to many types of scatters. Without the protection from the nonreciprocity, the backscattering occurs under certain circumstances. We present a perturbative method to calculate the backscattering of chiral photonic crystals in the presence of chiral/achiral scatters. The model is, essentially, a simplified analogy to the first-order Born approximation. Under reasonable assumptions based on the behaviors of chiral photonic modes, we obtained the expression of reflection coefficients which provides criteria for the prominent backscattering in such chiral structures. Numerical examinations using the finite-element method were also performed and the results agree well with the theoretical prediction. From both our theory and numerical calculations, we find that the amount of backscattering critically depends on the symmetry of scatter cross sections. Strong reflection takes place when the azimuthal Fourier components of scatter cross sections have an order l of 2. Chiral scatters without these Fourier components would not efficiently reflect the chiral photonic modes. In addition, for these chiral propagating modes, disturbances at the most significant parts of field profiles do not necessarily result in the most effective backscattering. The observation also reveals what types of scatters or defects should be avoided in one-way applications of chiral structures in order to minimize the backscattering.

  8. Perceptual shrinkage of a one-way motion path with high-speed motion.

    Science.gov (United States)

    Nakajima, Yutaka; Sakaguchi, Yutaka

    2016-07-28

    Back-and-forth motion induces perceptual shrinkage of the motion path, but such shrinkage is hardly perceived for one-way motion. If the shrinkage is caused by temporal averaging of stimulus position around the endpoints, it should also be induced for one-way motion at higher motion speeds. In psychophysical experiments with a high-speed projector, we tested this conjecture for a one-way motion stimulus at various speeds (4-100 deg/s) along a straight path. Results showed that perceptual shrinkage of the motion path was robustly observed in higher-speed motion (faster than 66.7 deg/s). In addition, the amount of the forwards shift at the onset position was larger than that of the backwards shift at the offset position. These results demonstrate that high-speed motion can induce shrinkage, even for a one-way motion path. This can be explained by the view that perceptual position is represented by the integration of the temporal average of instantaneous position and the motion representation.

  9. Can the one-way speed of light be used for detection of violations of the relativity principle?

    International Nuclear Information System (INIS)

    Experimental attempts at measurement of the one-way speed of light are considered within the framework of relativistic theories. We show that if the effect of clock transport is taken into account, the observations from this class of experiment do not actually lead to either measurement of the one-way speed of light or determination of the absolute velocity of the preferred frame (even if, for non-entrained ether theories, such a frame were to exist). -- Highlights: ► We consider preferred frame theories that agree with experiments that support SR. ► Measurements of the one-way speed of light is discussed. ► The effect of clock transport is taken into account. ► These experiments do not lead to measurement of the one-way speed of light. ► The absolute velocity of the preferred frame cannot be detected.

  10. On the experimental determination of the one-way speed of light

    International Nuclear Information System (INIS)

    In this paper the question of the isotropy of the one-way speed of light is addressed from an experimental perspective. In particular, we analyse two experimental methods commonly used in its determination. The analysis is aimed at clarifying the view that the one-way speed of light cannot be determined by techniques in which physical entities close paths. The procedure employed here will provide epistemological tools so that physicists understand that a direct measurement of the speed not only of light but of any physical entity is by no means trivial. Our results shed light on the physics behind the experiments which may be of interest for both physicists with an elemental knowledge in special relativity and philosophers of science.

  11. On the experimental determination of the one-way speed of light

    Science.gov (United States)

    Pérez, Israel

    2011-07-01

    In this paper the question of the isotropy of the one-way speed of light is addressed from an experimental perspective. In particular, we analyse two experimental methods commonly used in its determination. The analysis is aimed at clarifying the view that the one-way speed of light cannot be determined by techniques in which physical entities close paths. The procedure employed here will provide epistemological tools so that physicists understand that a direct measurement of the speed not only of light but of any physical entity is by no means trivial. Our results shed light on the physics behind the experiments which may be of interest for both physicists with an elemental knowledge in special relativity and philosophers of science.

  12. How to Plan and Analyze an Isentropic Compression Experiment (ICE)

    Energy Technology Data Exchange (ETDEWEB)

    Hare, D E

    2004-08-06

    This report is a how-to manual for planning and analyzing an Isentropic Compression Experiment (ICE). Here the specific task is to find the unreacted Hugoniot of high explosive (HE) using Sandia National Laboratories Z-machine facility. However, many of the principles are broadly applicable to general ICE problems.

  13. Demonstration of active feedforward one-way quantum computing with photon-matter hyperentanglement

    Science.gov (United States)

    Xu, Xiao-Fan; Bao, Xiao-Hui; Pan, Jian-Wei

    2012-11-01

    We report an optical one-way quantum computing experiment with stationary quantum memory involved. First we create a hybrid four-qubit cluster state with two qubits propagating as photons and the other two stationary and stored in a laser-cooled atomic-ensemble quantum memory, and characterize it with entanglement witnesses and quantum state tomography. Then, by making use of this cluster state and fast operations of electro-optic modulators, we realize memory-assisted feedforward operations and demonstrate deterministic single-qubit rotation as an example.

  14. One-way Quantum Deficit and Decoherence for Two-qubit X States

    Science.gov (United States)

    Ye, Biao-Liang; Wang, Yao-Kun; Fei, Shao-Ming

    2016-04-01

    We study one-way quantum deficit of two-qubit X states systematically from analytical derivations. An effective approach to compute one-way quantum deficit of two-qubit X states has been provided. Analytical results are presented as for detailed examples. Moreover, we demonstrate the decoherence of one-way quantum deficit under phase damping channel.

  15. Radioactive beam experiments using the Fragment Mass Analyzer

    Energy Technology Data Exchange (ETDEWEB)

    Davids, C.N.

    1994-04-01

    The Fragment Mass Analyzer (FMA) is a recoil mass spectrometer that has many potential applications in experiments with radioactive beams. The FMA can be used for spectroscopic studies of nuclei produced in reactions with radioactive beams. The FMA is also an ideal tool for studying radiative capture reactions of astrophysical interest, using inverse kinematics. The FMA has both mass and energy dispersion, which can be used to efficiently separate the reaction recoils from the primary beam. When used with radioactive beams, the FMA allows the recoils from radiative capture reactions to be detected in a low-background environment.

  16. Can One-Way Light Speed be Measured? Comment on E. D. Greaves et al., Am. J. Phys. 77(10), 894-896 (2009)

    CERN Document Server

    Klauber, Robert D

    2010-01-01

    The convention dependence of one-way light speed is explained in a manner accessible to those unaccustomed to the concept. That logic is used to challenge the claim by Greaves et al that their experiment detected one-way light speed. The reason for the result obtained is then presented and followed by an explanation of why the Romer experiment did not measure a convention independent one-way light speed.

  17. 超大跨径单向预应力UHPC连续箱梁桥概念设计与初步实验%Conceptual design and preliminary experiment of super-long-span continuous box-girder bridge composed of one-way prestressed UHPC

    Institute of Scientific and Technical Information of China (English)

    邵旭东; 詹豪; 雷薇; 张哲

    2013-01-01

    A novel super-long-span continuous box-girder bridge made from ultra-high-performance concrete (UHPC) was proposed.By combining UHPC,thin-walled box girder with dense diaphragm plates and partial external prestressing into the novel box-girder system,a traditional three-dimensional prestressed structure is transformed into a longitudinal one-way prestressed one.Hence,not only can the main span length of girder bridges be improved,but also the ever existing problems in long-span PC bridges,such as the cracking in concrete girders and the excessive deflection at midspan,may be eliminated.A trial-design for a continuous box-girder bridge built from UHPC with main span length of 400m is presented,and the results show that the thicknesses of its components can be decreased greatly,the transverse stress decreased effectively by using the dense diaphragms,and the self-weight of superstructure may be reduced about 50% so that a good economy may be achieved and the one-way prestressed structure is completely feasible.The model tests were carried out to evaluate the creep deformation and shear capability of UHPC beam,and the results show that the creep deformation of UHPC beam is only 20% of that of ordinary concrete beam,and the shear capability of web can be further enhanced by employing dense diaphragms.The novel super-long-span continuous box-girder bridge is a competitive candidate in the aspects of safety,economy and durability,implying that it is applicable to the continuous girder bridge with main span length of 400m.%提出一种超大跨径超高性能混凝土(UHPC)连续箱梁桥新体系.新体系梁桥将超高性能混凝土(UHPC)、密集横隔板薄壁箱梁和部分体外预应力有机结合,变传统三向预应力为纵向单向预应力结构,不仅提升了梁桥跨径,而且可消除传统大跨径PC梁桥的主梁过度下挠和梁体开裂两类病害,通过对跨径400m的UHPC连续箱梁桥试设计,结果表明,新体系箱梁桥各种板件

  18. Optical diode based on the one-way light-speed anisotropy

    OpenAIRE

    Exirifard, Qasem

    2011-01-01

    We report that a triangular Fabry-Perot resonator filled with a parity-odd linear anisotropic medium exhibiting the one-way light speed anisotropy acts as a perfect diode. A Linear crystal such as the nematic liquid crystals whose molecular structures break parity can exhibit the one-way light speed anisotropy. The one-way light speed anisotropy also can be induced in a non-linear medium in the presence of constant electric and magnetic field strengths.

  19. On small set of one-way LOCC indistinguishability of maximally entangled states

    Science.gov (United States)

    Wang, Yan-Ling; Li, Mao-Sheng; Zheng, Zhu-Jun; Fei, Shao-Ming

    2016-04-01

    In this paper, we study the one-way local operations and classical communication (LOCC) problem. In {C}^d⊗ {C}^d with d≥ 4, we construct a set of 3lceil √{d}rceil -1 one-way LOCC indistinguishable maximally entangled states which are generalized Bell states. Moreover, we show that there are four maximally entangled states which cannot be perfectly distinguished by one-way LOCC measurements for any dimension d≥ 4.

  20. Demonstration of orbit determination for the Lunar Reconnaissance Orbiter using one-way laser ranging data

    Science.gov (United States)

    Bauer, S.; Hussmann, H.; Oberst, J.; Dirkx, D.; Mao, D.; Neumann, G. A.; Mazarico, E.; Torrence, M. H.; McGarry, J. F.; Smith, D. E.; Zuber, M. T.

    2016-09-01

    We used one-way laser ranging data from International Laser Ranging Service (ILRS) ground stations to NASA's Lunar Reconnaissance Orbiter (LRO) for a demonstration of orbit determination. In the one-way setup, the state of LRO and the parameters of the spacecraft and all involved ground station clocks must be estimated simultaneously. This setup introduces many correlated parameters that are resolved by using a priori constraints. Moreover the observation data coverage and errors accumulating from the dynamical and the clock modeling limit the maximum arc length. The objective of this paper is to investigate the effect of the arc length, the dynamical and modeling accuracy and the observation data coverage on the accuracy of the results. We analyzed multiple arcs using lengths of 2 and 7 days during a one-week period in Science Mission phase 02 (SM02, November 2010) and compared the trajectories, the post-fit measurement residuals and the estimated clock parameters. We further incorporated simultaneous passes from multiple stations within the observation data to investigate the expected improvement in positioning. The estimated trajectories were compared to the nominal LRO trajectory and the clock parameters (offset, rate and aging) to the results found in the literature. Arcs estimated with one-way ranging data had differences of 5-30 m compared to the nominal LRO trajectory. While the estimated LRO clock rates agreed closely with the a priori constraints, the aging parameters absorbed clock modeling errors with increasing clock arc length. Because of high correlations between the different ground station clocks and due to limited clock modeling accuracy, their differences only agreed at the order of magnitude with the literature. We found that the incorporation of simultaneous passes requires improved modeling in particular to enable the expected improvement in positioning. We found that gaps in the observation data coverage over 12 h (≈6 successive LRO orbits

  1. Experience analyzing wind data for large-scale integration

    Energy Technology Data Exchange (ETDEWEB)

    Gao, Zhi; Dai, RenChang; Freeman, Lavelle A.; Miller, Nicholas W.; Shao, Miaolei [GEe Energy Consulting Group, Schenectady, NY (United States)

    2010-07-01

    Wind is a major piece of the green energy effort, and will certainly play a more important role in the future power industry. GE Energy has conducted a numer of large-scale renewable integration studies in North America. The objective of these studies is to understand how integrating large amounts of variable energy resources into the supply mix affects grid operation and economics. As part of this effort, various statistical analyses were performed to characterize the variability and uncertainty of wind generation. Based on the results of this characterization, further engineering and economic studies are performed to assess operational requirements, costs, and savings attributable to wind resources. For these analyses, a large amount of input data is usually required, and is often obtained in different formats. These data sets are not very intuitive at first glance, and need extensive effort to be developed into something informative. Based on project experience, different methods have been developed to explore and extrapolate the information hidden within large amounts of raw data. Algorithms and macros have been written to validate and correct data, to create summary information, and to produce derived data sets for further analyses. Informative plots and charts have also been programmed into various applications to provide quick, useful analysis when needed. This article introduces some illustrative and easy-to-analyze ways to look at these data using readily available tools. (orig.)

  2. Reciprocity Theorems for One-Way Wave Fields in Curvilinear Coordinate Systems

    NARCIS (Netherlands)

    Frijlink, M.; Wapenaar, C.P.A.

    2010-01-01

    One-way wave equations conveniently describe wave propagation in media with discontinuous and/or rapid variations in one direction, but with smooth and slow variations in the complementary transverse directions. In the past, reciprocity theorems have been developed in terms of one-way wave fields. T

  3. A pseudodifferential equation with damping for one-way wave propagation in inhomogeneous acoustic media

    NARCIS (Netherlands)

    Stolk, C.C.

    2004-01-01

    A one-way wave equation is an evolution equation in one of the space directions that describes (approximately) a wave field. The exact wave field is approximated in a high frequency, microlocal sense. Here we derive the pseudodifferential one-way wave equation for an inhomogeneous acoustic medium us

  4. Comment on "One-way deficit of two qubit X states"

    Science.gov (United States)

    Jing, Naihuan; Zhang, Xia; Wang, Yao-Kun

    2015-12-01

    We improve the recent method of Wang et. al to calculate exactly the one-way information deficit of any X-state. Analytical formulas of the one-way information deficit are given for several nontrivial regions of the parameters.

  5. On the Experimental Determination of the One-Way Speed of Light

    Science.gov (United States)

    Perez, Israel

    2011-01-01

    In this paper the question of the isotropy of the one-way speed of light is addressed from an experimental perspective. In particular, we analyse two experimental methods commonly used in its determination. The analysis is aimed at clarifying the view that the one-way speed of light cannot be determined by techniques in which physical entities…

  6. A note on one-way quantum deficit and quantum discord

    Science.gov (United States)

    Ye, Biao-Liang; Fei, Shao-Ming

    2016-01-01

    One-way quantum deficit and quantum discord are two important measures of quantum correlations. We revisit the relationship between them in two-qubit systems. We investigate the conditions that both one-way quantum deficit and quantum discord have the same optimal measurement ensembles, and demonstrate that one-way quantum deficit can be derived from the quantum discord for a class of X states. Moreover, we give an explicit relation between one-way quantum deficit and entanglement of formation. We show that under phase damping channel both one-way quantum deficit and quantum discord evolve exactly in the same way for four parameter X states. Some examples are presented in details.

  7. Numerical Analysis of Stress on Pump Blade by One-Way Coupled Fluid-Structure Simulation

    Science.gov (United States)

    Kobayashi, Katsutoshi; Ono, Shigeyoshi; Harada, Ichiro; Chiba, Yoshimasa

    A mixed-flow pump with an unshrouded impeller was computed by a one-way coupled fluid-structure simulation to evaluate a prediction accuracy of stress and analyze a flow pattern which caused the largest stress. The stress occurring around a blade root was predicted by a numerical simulation and compared with an experimental one. Five flow rates, Q/Qbep=0,40,70,100 and 120% were simulated and the predicted stresses at all flow rates agreed with the experimental ones within -11˜+6% accuracy. The largest stress occurred around a blade root on a pressure side of blade surface at all flow rates. The stress became largest at 70% flow rate. A flow pattern around the blade was analyzed to investigate how the largest stress occurred at 70% flow rate. It was found in this study that a flow separation occurred around a leading edge on a suction side of blade surface at 70% flow rate and the largest load was acting on an outside region of blade.

  8. Entrepreneurial experiments in science policy: Analyzing the Human Genome Project

    OpenAIRE

    Kenneth G. Huang; Fiona E. Murray

    2009-01-01

    We re-conceptualize the role of science policy makers, envisioning and illustrating their move from being simple investors in scientific projects to entrepreneurs who create the conditions for entrepreneurial experiments and initiate them. We argue that reframing science policy around the notion of conducting entrepreneurial experimentsexperiments that increase the diversity of technical, organizational and institutional arrangements in which scientific research is conducted – can provide ...

  9. Moments Based Framework for Performance Analysis of One-Way/Two-Way CSI-Assisted AF Relaying

    KAUST Repository

    Xia, Minghua

    2012-09-01

    When analyzing system performance of conventional one-way relaying or advanced two-way relaying, these two techniques are always dealt with separately and, thus, their performance cannot be compared efficiently. Moreover, for ease of mathematical tractability, channels considered in such studies are generally assumed to be subject to Rayleigh fading or to be Nakagami-$m$ channels with integer fading parameters, which is impractical in typical urban environments. In this paper, we propose a unified moments-based framework for general performance analysis of channel-state-information (CSI) assisted amplify-and-forward (AF) relaying systems. The framework is applicable to both one-way and two-way relaying over arbitrary Nakagami-$m$ fading channels, and it includes previously reported results as special cases. Specifically, the mathematical framework is firstly developed under the umbrella of the weighted harmonic mean of two Gamma-distributed variables in conjunction with the theory of Pad\\\\\\'e approximants. Then, general expressions for the received signal-to-noise ratios of the users in one-way/two-way relaying systems and the corresponding moments, moment generation function, and cumulative density function are established. Subsequently, the mathematical framework is applied to analyze, compare, and gain insights into system performance of one-way and two-way relaying techniques, in terms of outage probability, average symbol error probability, and achievable data rate. All analytical results are corroborated by simulation results as well as previously reported results whenever available, and they are shown to be efficient tools to evaluate and compare system performance of one-way and two-way relaying.

  10. Measuring the user experience collecting, analyzing, and presenting usability metrics

    CERN Document Server

    Tullis, Thomas

    2013-01-01

    Measuring the User Experience was the first book that focused on how to quantify the user experience. Now in the second edition, the authors include new material on how recent technologies have made it easier and more effective to collect a broader range of data about the user experience. As more UX and web professionals need to justify their design decisions with solid, reliable data, Measuring the User Experience provides the quantitative analysis training that these professionals need. The second edition presents new metrics such as emotional engagement, personas, k

  11. Momentum analyzers DCBA for neutrinoless double beta decay experiments

    International Nuclear Information System (INIS)

    Momentum analyzers called Drift Chamber Beta-ray Analyzer (DCBA) are being developed at KEK in order to search for neutrinoless double beta decays of nuclei. A test prototype, DCBA-T2, has been constructed to confirm the principle detecting electron tracks in a uniform magnetic field. Another prototype, DCBA-T3, is now under construction to improve the energy resolution. The test results and the present statuses of these prototypes are presented.

  12. Momentum analyzers DCBA for neutrinoless double beta decay experiments

    Energy Technology Data Exchange (ETDEWEB)

    Ishihara, Nobuhiro, E-mail: nobuhiro.ishihara@kek.j [High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801 (Japan)

    2010-11-01

    Momentum analyzers called Drift Chamber Beta-ray Analyzer (DCBA) are being developed at KEK in order to search for neutrinoless double beta decays of nuclei. A test prototype, DCBA-T2, has been constructed to confirm the principle detecting electron tracks in a uniform magnetic field. Another prototype, DCBA-T3, is now under construction to improve the energy resolution. The test results and the present statuses of these prototypes are presented.

  13. The one-way communication complexity of the Boolean Hidden Matching Problem

    CERN Document Server

    Kerenidis, I; Kerenidis, Iordanis; Raz, Ran

    2006-01-01

    We give a tight lower bound of Omega(\\sqrt{n}) for the randomized one-way communication complexity of the Boolean Hidden Matching Problem [BJK04]. Since there is a quantum one-way communication complexity protocol of O(\\log n) qubits for this problem, we obtain an exponential separation of quantum and classical one-way communication complexity for partial functions. A similar result was independently obtained by Gavinsky, Kempe, de Wolf [GKdW06]. Our lower bound is obtained by Fourier analysis, using the Fourier coefficients inequality of Kahn Kalai and Linial [KKL88].

  14. To Re-Consider the One-Way Speed of Light Using Fizeau-Type-Coupled-Slotted-Disks

    CERN Document Server

    Ahmed, Md Farid; Sargoytchev, Stoyan; Stauffer, A D

    2011-01-01

    The isotropy of the speed of light - the fundamental postulate of Special Relativity (SR) constrains conceptions of time, space and the existence of a preferred cosmological reference frame. Consequently, this phenomenon has been subject to considerable experimental scrutiny. Most isotropy tests are two-way Michelson-Morley type tests which established the isotropy of the two-way speed in 1881. These approaches provide no experimental limit for the one-way (single-trip) isotropy of the speed of light which is still unresolved. Here we consider Fizeau-type experiments to test the isotropy of the one-way speed of light. Our theoretical and experimental design suggests that our approach is 10000 times more sensitive than that of previous Fizeau-type experiments and 2000 times more sensitive than Michelson-Morley type two-way tests.

  15. One-way membrane trafficking of SOS in receptor-triggered Ras activation.

    Science.gov (United States)

    Christensen, Sune M; Tu, Hsiung-Lin; Jun, Jesse E; Alvarez, Steven; Triplet, Meredith G; Iwig, Jeffrey S; Yadav, Kamlesh K; Bar-Sagi, Dafna; Roose, Jeroen P; Groves, Jay T

    2016-09-01

    SOS is a key activator of the small GTPase Ras. In cells, SOS-Ras signaling is thought to be initiated predominantly by membrane recruitment of SOS via the adaptor Grb2 and balanced by rapidly reversible Grb2-SOS binding kinetics. However, SOS has multiple protein and lipid interactions that provide linkage to the membrane. In reconstituted-membrane experiments, these Grb2-independent interactions were sufficient to retain human SOS on the membrane for many minutes, during which a single SOS molecule could processively activate thousands of Ras molecules. These observations raised questions concerning how receptors maintain control of SOS in cells and how membrane-recruited SOS is ultimately released. We addressed these questions in quantitative assays of reconstituted SOS-deficient chicken B-cell signaling systems combined with single-molecule measurements in supported membranes. These studies revealed an essentially one-way trafficking process in which membrane-recruited SOS remains trapped on the membrane and continuously activates Ras until being actively removed via endocytosis. PMID:27501536

  16. One-way membrane trafficking of SOS in receptor-triggered Ras activation.

    Science.gov (United States)

    Christensen, Sune M; Tu, Hsiung-Lin; Jun, Jesse E; Alvarez, Steven; Triplet, Meredith G; Iwig, Jeffrey S; Yadav, Kamlesh K; Bar-Sagi, Dafna; Roose, Jeroen P; Groves, Jay T

    2016-09-01

    SOS is a key activator of the small GTPase Ras. In cells, SOS-Ras signaling is thought to be initiated predominantly by membrane recruitment of SOS via the adaptor Grb2 and balanced by rapidly reversible Grb2-SOS binding kinetics. However, SOS has multiple protein and lipid interactions that provide linkage to the membrane. In reconstituted-membrane experiments, these Grb2-independent interactions were sufficient to retain human SOS on the membrane for many minutes, during which a single SOS molecule could processively activate thousands of Ras molecules. These observations raised questions concerning how receptors maintain control of SOS in cells and how membrane-recruited SOS is ultimately released. We addressed these questions in quantitative assays of reconstituted SOS-deficient chicken B-cell signaling systems combined with single-molecule measurements in supported membranes. These studies revealed an essentially one-way trafficking process in which membrane-recruited SOS remains trapped on the membrane and continuously activates Ras until being actively removed via endocytosis.

  17. Designing experiments and analyzing data a model comparison perspective

    CERN Document Server

    Maxwell, Scott E

    2013-01-01

    Through this book's unique model comparison approach, students and researchers are introduced to a set of fundamental principles for analyzing data. After seeing how these principles can be applied in simple designs, students are shown how these same principles also apply in more complicated designs. Drs. Maxwell and Delaney believe that the model comparison approach better prepares students to understand the logic behind a general strategy of data analysis appropriate for various designs; and builds a stronger foundation, which allows for the introduction of more complex topics omitt

  18. Historiography taking issue: analyzing an experiment with heroin abusers.

    Science.gov (United States)

    Dehue, Trudy

    2004-01-01

    This article discusses the predicament of historians becoming part of the history they are investigating and illustrates the issue in a particular case. The case is that of the randomized controlled trial (RCT)-more specifically, its use for testing the effects of providing heroin to severe heroin abusers. I counter the established view of the RCT as a matter of timeless logic and argue that this research design was developed in the context of administrative knowledge making under twentieth-century economic liberalism of which it epitomizes some central values. I also argue that the applicability of the RCT depends on the degree to which its advocates can define the issue to be studied according to its inherent values. Next, I demonstrate how advocates of an RCT with heroin provision in the Netherlands steered the political discussion on heroin provision and how the values of economic liberalism also shaped the results of the Dutch maintenance experiment. In addition, I relate how my analysis of this experiment became part of political debates in the Netherlands. Contrary to my intentions, adversaries of heroin maintenance used my critique on the heroin RCT as an argument against heroin maintenance. Such risks are inherent to historiography and sociology of science aiming at practical relevance while challenging treasured scientific beliefs. I conclude that it still seems better to expose arguments on unjustified certainties than to suppress them for strategic reasons. PMID:15237417

  19. Application of simple array method in one-way traffic synthetic asessment

    Institute of Scientific and Technical Information of China (English)

    PEI Yu-long; LIU Guang-ping

    2005-01-01

    One-Way Traffic synthetic assessing can not only determine the assessment method, but can also provide an opportunity for further study of road systems. Comparing three Road Traffic Planning methods, which are Value Analysis method, Simple Array method and Step Analysis method, this paper concludes that Simple Array method has one prominent merit, avoiding the complicated relationship of various factors and simplifying the complex problem. Therefore Simple Array method is firstly presented in this paper to be the assessing measure to assess the One-Way Traffic Planning project. Although this assessing method cannot wholly give way to man's will, through consistently testing on qualitative factors and with the decision-making results of a multiprogram, this method is still an effective method. Using an example of Harbin One-Way Traffic planning, with seven assessing indexes including economic benefit index, Simple Array method is applied to synthetically assessing the program. This fully reflects the general function of One-Way Traffic planning program and objectively evaluates the program. It also proves that, as the method of One-Way Traffic synthetic assessing, Simple Array method is rational and practical.

  20. One-way helical electromagnetic wave propagation supported by magnetized plasma

    CERN Document Server

    Yang, Biao; Gao, Wenlong; Guo, Qinghua; Zhang, Shuang

    2014-01-01

    In this paper we reveal the presence of photonic one-way helical surface states in a simple natural system - magnetized plasma. The application of an external magnetic field to a bulk plasma body not only breaks time-reversal-symmetry but also leads to separation of Equi-Frequency Contour surfaces (EFCs) to form topologically nontrivial gaps in k space. Interestingly, these EFCs support topologically protected surface states. We numerically investigate an interface between magnetized plasma, using a realistic model for parameter dispersion, and vacuum, to confirm the existence of one-way scatter-immune helical surface states. Unlike previous proposals for achieving photonic one-way propagation, our scheme does not require the use of artificial structures and should therefore be simple to implement experimentally.

  1. Field experience with the mini multi channel analyzer (MMCA)

    International Nuclear Information System (INIS)

    The Mini MCA (MMCA, model MCA-166) is a unique, small size, portable 4K channel multi channel analyzer, multi scaler and timer/counter. It has a low power microprocessor which controls a sophisticated amplifier and fast ADC with constant dead time of 7 microsec. The internal power supply is suitable for a great variety of radiation detectors including germanium detectors (HPGe). It includes preamplifier power and detector high voltage supply. The MMCA has been developed in the Forschungszentrum Rossendorf under the German Support Programme for the Department of Safeguards of the IAEA and for the EURATOM Inspectorate. It is produced by GBS Elektronik in Rossendorf near Dresden. Since it is fully computer controlled, it forms a small size, light weight and versatile measurement platform. Different radiation detectors can be connected, easily configured and used. Its design reduces the weight of the measurement system by about an order of magnitude compared to similar equipment of the previous generation. Both the IAEA and EURATOM have introduced this device into their safeguards instrumentation inventories. The first field uses of the device have covered so far the following applications: U-235 enrichment measurements with NaI and CdZnTe detectors; U-235 measurements using MGAU and HPGe; U/Pu qualitative attribute tests using NaI and CdZnTe detectors; Spent fuel verification using SFAT (Spent Fuel Attribute Tester); Criticality test using a He-3 counter; Active length measurements using a CdZnTe detector; Spectral gamma survey (Iraq Action Team). In this paper the use of the MMCA in some of the above applications in initial inventory verifications is described. This is an inspection activity which requires the use of portable and versatile inspection equipment to cover a wide range of verification methods. The device so far has been used in more then 20 inspections. Its major advantage appeared to be its small size, long battery lifetime and hardware versatility

  2. Universal one-way light speed from a universal light speed over closed paths

    OpenAIRE

    Minguzzi, E.; MacDonald, A

    2002-01-01

    This paper gives two complete and elementary proofs that if the speed of light over closed paths has a universal value $c$, then it is possible to synchronize clocks in such a way that the one-way speed of light is c. The first proof is an elementary version of a recent proof. The second provides high precision experimental evidence that it is possible to synchronize clocks in such a way that the one-way speed of light has a universal value. We also discuss an old incomplete proof by Weyl whi...

  3. Searching for a highly unlikely frame dependent speed of light using a one-way test

    OpenAIRE

    Ahmed, Md. Farid; Quine, Brendan M.; Pagiatakis, Spiros; Stauffer, A D

    2013-01-01

    At first blush, what appears to be a purely physical question to measure any velocity: how to measure the velocity on a one-way trip? However, due to the debates of the clock-synchronization and the successes of Special Relativity (SR), searching of the possibility of one-way speed of light measurement did not receive wider attention since the declaration of the constancy of the speed of light in vacuum by Maxwell's Electrodynamics in 1864. However, our analysis suggests that the debates of t...

  4. Bending self-collimated one-way light by using gyromagnetic photonic crystals

    International Nuclear Information System (INIS)

    We theoretically demonstrate that electromagnetic waves can self-collimate and propagate unidirectionally in photonic crystals fabricated using semicylindrical ferrite rods in magnetized states. The parity and time-reversal symmetries of such photonic crystals are broken, resulting in a self-collimated one-way body wave within the photonic crystals. By applying the bias magnetic field in a complex configuration, the self-collimated one-way wave beam can be bent into arbitrary trajectories within the photonic crystal, providing an avenue for controlling wave beams

  5. Bending self-collimated one-way light by using gyromagnetic photonic crystals

    Energy Technology Data Exchange (ETDEWEB)

    Li, Qing-Bo [School of Electronic Sciences and Engineering, Nanjing University, Nanjing 210093 (China); Jiangsu Key Construction Laboratory of Modern Measurement Technology and Intelligent System, Huaiyin Normal University, Huaian 223300 (China); Li, Zhen; Wu, Rui-xin, E-mail: rxwu@nju.edu.cn [School of Electronic Sciences and Engineering, Nanjing University, Nanjing 210093 (China)

    2015-12-14

    We theoretically demonstrate that electromagnetic waves can self-collimate and propagate unidirectionally in photonic crystals fabricated using semicylindrical ferrite rods in magnetized states. The parity and time-reversal symmetries of such photonic crystals are broken, resulting in a self-collimated one-way body wave within the photonic crystals. By applying the bias magnetic field in a complex configuration, the self-collimated one-way wave beam can be bent into arbitrary trajectories within the photonic crystal, providing an avenue for controlling wave beams.

  6. Spacecraft Doppler tracking with possible violations of LLI and LPI: upper bounds from one-way measurements on MEX

    Science.gov (United States)

    Xie, Yi; Huang, Yong

    2015-10-01

    We analyze the post-fit residuals of one-way Doppler tracking data from the Mars Express (MEX) spacecraft to test possible violations of local Lorentz invariance (LLI) and local position invariance (LPI). These one-way Doppler observations were carried out on 2011 August 7 for about 20 minutes at Sheshan Station of Shanghai Astronomical Observatory in China. These downlink signals were sent by MEX for telemetry at X-band. Because we are not able to decode the data in the form of telemetry and separate them from the carrier frequency, this makes the post-fit residuals of the Doppler data degrade to the level of 0.1 m s-1. Even so, the residuals can still impose upper bounds on LLI and LPI at 10-1, which is consistent with the prediction based on our analysis of the detectability. Although the upper bounds given by three-way Doppler tracking of MEX are better than those obtained in the present work, one-way Doppler measurements still provide a unique chance to test possible violations of LLI and LPI far from the ground stations.

  7. Security analysis of a one-way hash function based on spatiotemporal chaos

    Institute of Scientific and Technical Information of China (English)

    Wang Shi-Hong; Shan Peng-Yang

    2011-01-01

    The collision and statistical properties of a one-way hash function based on spatiotemporal chaos are investigated Analysis and simulation results indicate that collisions exist in the original algorithm and,therefore,the original algorithm is insecure and vulnerable. An improved algorithm is proposed to avoid the collisions.

  8. A Note on Noncentrality Parameters for Contrast Tests in a One-Way Analysis of Variance

    Science.gov (United States)

    Liu, Xiaofeng Steven

    2010-01-01

    The noncentrality parameter for a contrast test in a one-way analysis of variance is based on the dot product of 2 vectors whose geometric meaning in a Euclidian space offers mnemonic hints about its constituents. Additionally, the noncentrality parameters for a set of orthogonal contrasts sum up to the noncentrality parameter for the omnibus "F"…

  9. One-way Penetration of the Boundary Wave in Anisotropic Structures

    Directory of Open Access Journals (Sweden)

    A.D. Arkhipov

    2012-06-01

    Full Text Available One-way penetration of the boundary wave in single-layer and multilayer anisotropic structures is investigated. We show that the conditions for minimal wave reflection from one side and full wave reflection from another side of the structure are possible. No conversation of polarization can be obtained for the considered effect.

  10. Teaching Principles of One-Way Analysis of Variance Using M&M's Candy

    Science.gov (United States)

    Schwartz, Todd A.

    2013-01-01

    I present an active learning classroom exercise illustrating essential principles of one-way analysis of variance (ANOVA) methods. The exercise is easily conducted by the instructor and is instructive (as well as enjoyable) for the students. This is conducive for demonstrating many theoretical and practical issues related to ANOVA and lends itself…

  11. Complex spatiotemporal behavior in a chain of one-way nonlinearly coupled elements

    DEFF Research Database (Denmark)

    Gaididei, Yuri Borisovich; Berkemer, Rainer; Gorria, C.;

    2011-01-01

    The dynamics of asymmetrically coupled nonlinear elements is considered. It is shown that there are two distinctive regimes of oscillatory behavior of one-way nonlinearly coupled elements depending on the relaxation time and the strength of the coupling. In the subcritical regime when...

  12. A new non-uniform blast load model for SDOF method of one-way reinforced concrete slab

    OpenAIRE

    Wang S.-C.; Lu F; Zhang D; Wang W.; Tang F

    2012-01-01

    A new effective model for calculation of the equivalent uniform blast load for non-uniform blast load such as close-in explosion of a one-way square and rectangle reinforced concrete slab is proposed in this paper. The model is then validated using single degree of freedom (SDOF) system with the experiments and blast tests for square slabs and rectangle slabs. Test results showed that the model is accurate in predicting the explosive charge weight and stand-off distance to impose a given dama...

  13. Experimental realization of one-way quantum computing with two-photon four-qubit cluster states.

    Science.gov (United States)

    Chen, Kai; Li, Che-Ming; Zhang, Qiang; Chen, Yu-Ao; Goebel, Alexander; Chen, Shuai; Mair, Alois; Pan, Jian-Wei

    2007-09-21

    We report an experimental realization of one-way quantum computing on a two-photon four-qubit cluster state. This is accomplished by developing a two-photon cluster state source entangled both in polarization and spatial modes. With this special source, we implemented a highly efficient Grover's search algorithm and high-fidelity two-qubit quantum gates. Our experiment demonstrates that such cluster states could serve as an ideal source and a building block for rapid and precise optical quantum computation.

  14. Acoustic one-way mode conversion and transmission by sonic crystal waveguides

    Science.gov (United States)

    Ouyang, Shiliang; He, Hailong; He, Zhaojian; Deng, Ke; Zhao, Heping

    2016-09-01

    We proposed a scheme to achieve one-way acoustic propagation and even-odd mode switching in two mutually perpendicular sonic crystal waveguides connected by a resonant cavity. The even mode in the entrance waveguide is able to switch to the odd mode in the exit waveguide through a symmetry match between the cavity resonant modes and the waveguide modes. Conversely, the odd mode in the exit waveguide is unable to be converted into the even mode in the entrance waveguide as incident waves and eigenmodes are mismatched in their symmetries at the waveguide exit. This one-way mechanism can be applied to design an acoustic diode for acoustic integration devices and can be used as a convertor of the acoustic waveguide modes.

  15. Acoustic one-way mode conversion and transmission by sonic crystal waveguides

    CERN Document Server

    Ouyang, Shiliang; He, Zhaojian; Deng, Ke; Zhao, Heping

    2016-01-01

    We proposed a scheme to achieve one-way acoustic propagation and even odd mode switching in two mutually perpendicular sonic crystal waveguides connected by a resonant cavity. The even mode in the entrance waveguide is able to switch to odd mode in the exit waveguide through a symmetry match between the cavity resonant modes and the waveguide modes. Conversely, the odd mode in the exit waveguide is unable to be converted into the even mode in the entrance waveguide as incident waves and eigenmodes are mismatched in their symmetries at the waveguide exit. This one way mechanism can be applied to design an acoustic diode for acoustic integration devices and can be used as a convertor of the acoustic waveguide modes.

  16. Quantum error correcting codes and one-way quantum computing: Towards a quantum memory

    CERN Document Server

    Schlingemann, D

    2003-01-01

    For realizing a quantum memory we suggest to first encode quantum information via a quantum error correcting code and then concatenate combined decoding and re-encoding operations. This requires that the encoding and the decoding operation can be performed faster than the typical decoherence time of the underlying system. The computational model underlying the one-way quantum computer, which has been introduced by Hans Briegel and Robert Raussendorf, provides a suitable concept for a fast implementation of quantum error correcting codes. It is shown explicitly in this article is how encoding and decoding operations for stabilizer codes can be realized on a one-way quantum computer. This is based on the graph code representation for stabilizer codes, on the one hand, and the relation between cluster states and graph codes, on the other hand.

  17. Longitudinal chirality, enhanced non-reciprocity, and nano-scale planar one-way guiding

    CERN Document Server

    Mazor, Yarden

    2012-01-01

    When a linear chain of plasmonic nano-particles is exposed to a transverse DC magnetic field, the chain modes are elliptically polarized, in a single plane parallel to the chain axis; hence, a novel longitudinal plasmon-rotation is created. If, in addition, the chain geometry possesses longitudinal rotation, e.g. by using ellipsoidal particles that rotate in the same plane as the plasmon rotation, strong non-reciprocity is created. The structure possesses a new kind of chirality--the longitudinal chirality--and supports one-way guiding. Since all particles rotate in the same plane, the geometry is planar and can be fabricated by printing leaf-like patches on a single plane. Furthermore, the magnetic field is significantly weaker than in previously reported one-way guiding structures. These properties are examined for ideal (lossless) and for lossy chains.

  18. One-Way Markov Process Approach to Repeat Times of Large Earthquakes in Faults

    Science.gov (United States)

    Tejedor, Alejandro; Gomez, Javier B.; Pacheco, Amalio F.

    2012-11-01

    One of the uses of Markov Chains is the simulation of the seismic cycle in a fault, i.e. as a renewal model for the repetition of its characteristic earthquakes. This representation is consistent with Reid's elastic rebound theory. We propose a general one-way Markovian model in which the waiting time distribution, its first moments, coefficient of variation, and functions of error and alarm (related to the predictability of the model) can be obtained analytically. The fact that in any one-way Markov cycle the coefficient of variation of the corresponding distribution of cycle lengths is always lower than one concurs with observations of large earthquakes in seismic faults. The waiting time distribution of one of the limits of this model is the negative binomial distribution; as an application, we use it to fit the Parkfield earthquake series in the San Andreas fault, California.

  19. One-Way Diffusion of Ionic Liquids in a Mixing Process with Water

    Science.gov (United States)

    Oikawa, Noriko; Tahara, Daiki; Kurita, Rei

    2016-09-01

    In contrast to the usual diffusive mixing process between two miscible liquids, the ionic liquid [Cnmim][PF6] forms a droplet in water while mixing. The droplet retains a sharp interface with surface tension, gradually decreasing in size until completely mixed with water. This peculiar behavior in the mixing process accompanies one-way diffusion, in which ions diffuse in one direction only from the bulk IL droplet into the bulk continuum of water. The activation energy of the one-way diffusion at the [Cnmim][PF6]/water interface increases with increasing length of the hydrophobic alkyl chains attached to the cation molecules of [Cnmim][PF6]. It is considered that the hydrophobic nanoscale structure observed in [C4mim][PF6] plays an important role in the generation of the droplet and the mixing dynamics.

  20. Observation of Genuine One-Way Einstein-Podolsky-Rosen Steering.

    Science.gov (United States)

    Wollmann, Sabine; Walk, Nathan; Bennet, Adam J; Wiseman, Howard M; Pryde, Geoff J

    2016-04-22

    Within the hierarchy of inseparable quantum correlations, Einstein-Podolsky-Rosen steering is distinguished from both entanglement and Bell nonlocality by its asymmetry-there exist conditions where the steering phenomenon changes from being observable to not observable, simply by exchanging the role of the two measuring parties. While this one-way steering feature has been previously demonstrated for the restricted class of Gaussian measurements, for the general case of positive-operator-valued measures even its theoretical existence has only recently been settled. Here, we prove, and then experimentally observe, the one-way steerability of an experimentally practical class of entangled states in this general setting. As well as its foundational significance, the demonstration of fundamentally asymmetric nonlocality also has practical implications for the distribution of the trust in quantum communication networks.

  1. A comparison of one-way video and two-way video educational videoteleconferencing

    Science.gov (United States)

    Hendrix, Craig L.

    1995-05-01

    The literature reviewed in this study supported the effectiveness of educational videoteleconferencing; however, relatively little research was found comparing the two most interactive types of educational videoteleconferencing systems. An experimental research project was conducted, attempting to determine which educational videoteleconferencing system is more effective. Specifically, this project was designed to answer the following question: Is live two-way video with two-way audio more effective than live one-way video with two-way audio educational videoteleconferencing (EVC)?

  2. Reduction and analysis of one-way laser ranging data from ILRS ground stations to LRO

    OpenAIRE

    Bauer, Sven; Oberst, Jürgen; Hussmann, Hauke; Gläser, Philipp; Schreiber, Ulli; Mao, Dandan; Neumann, Gregory; Mazarico, Erwan; Torrence, Mark; McGarry, Jan; Smith, David; Zuber, Maria

    2013-01-01

    One-way LR (Laser Ranging) is being performed routinely from ILRS (International Laser Ranging Service) ground stations to LOLA (Lunar Orbiter Laser Altimeter), onboard NASA’s LRO (Lunar Reconnaissance Orbiter). From the accurate range measurements, spacecraft orbits and parameters of the lunar gravity field can be modeled. Furthermore, the data can be used for monitoring the long-term behavior of the LRO clock and for precisely referencing the MET (Mission Elapsed Time) to TDB (Bary...

  3. Periodic responses of a pulley-belt system with one-way clutch under inertia excitation

    Science.gov (United States)

    Ding, Hu

    2015-09-01

    The stable steady-state periodic response of a two-pulley belt drive system coupled with an accessory by a one-way clutch is presented. For the first time, the pulley-belt system is studied under double excitations. Specifically, the dual excitations consist of harmonic motion of the driving pulley and inertia excitation. The belt spans are modeled as axially moving viscoelastic beams by considering belt bending stiffness. Therefore, integro-partial-differential equations are derived for governing the transverse vibrations of the belt spans. Moreover, the transverse vibrations of the moving belt are coupled with the rotation vibrations of the pulleys by nonlinear dynamic tension. For describing the unidirectional decoupling function of the one-way device, rotation vibrations of the driven pulley and accessory are modeled as coupled piecewise ordinary differential equations. In order to eliminate the influence of the boundary of the belt spans, the non-trivial equilibriums of the pulley-belt system are numerically determined. Furthermore, A nonlinear piecewise discrete-continuous dynamical system is derived by introducing a coordinate transform. Coupled vibrations of the pulley-belt system are investigated via the Galerkin truncation. The natural frequencies of the coupled vibrations are obtained by using the fast Fourier transform. Moreover, frequency-response curves are abstracted from time histories. Therefore, resonance areas of the belt spans, the driven pulley and the accessory are presented. Furthermore, validity of the Galerkin method is examined by comparing with the differential and integral quadrature methods (DQM & IQM). By comparing the results with and without one-way device, significant damping effect of clutch on the dynamic response is discovered. Furthermore, the effects of the intensity of the driving pulley excitation and the inertia excitation are studied. Moreover, numerical results demonstrate that the two excitations interact on the steady

  4. Matched Bipartite Digraph Representation of Generalized Dynamical System Formed by One-way Barriers

    Science.gov (United States)

    Li, John; Mahoney, John; Mitchell, Kevin; Tom Solomon Collaboration

    2014-03-01

    We studied a dynamical system with stable and unstable manifolds that behave as one-way barriers, instead of separatrices in traditional dynamical system that are two-way barriers. This asymmetry gives rise to a richer dynamical behavior such as the overlapping of basins of attraction. The recently developed Burning Invariant Manifold (BIM) theory took a dynamical system approach to understand front propagation in Advection-Reaction-Diffusion systems, which have BIMs as the one-way barriers. Through numerical simulations under BIM theory, we found that although both unstable and stable BIMs are one-way barriers, unstable BIMs are the ones that we can experimentally observe the fronts converging onto, and the stable BIMs act as the basin boundaries. We further hypothesized a duality relation between the stable and unstable BIMs. Under the duality hypothesis, we developed a mechanism of the behavior of the system by reducing it back to a traditional system based on topology, and we found a simplification of the system by to summarize the topological information into a Matched Bipartite directed graph (MB digraph). This work was supported by the US National Science Foundation under grant PHY-0748828 and NSF Fellowship DGE-0937362.

  5. Relay Selection and Resource Allocation in One-Way and Two-Way Cognitive Relay Networks

    KAUST Repository

    Alsharoa, Ahmad M.

    2013-05-08

    In this work, the problem of relay selection and resource power allocation in one- way and two-way cognitive relay networks using half duplex channels with different relaying protocols is investigated. Optimization problems for both single and multiple relay selection that maximize the sum rate of the secondary network without degrading the quality of service of the primary network by respecting a tolerated interference threshold were formulated. Single relay selection and optimal power allocation for two-way relaying cognitive radio networks using decode-and-forward and amplify-and-forward protocols were studied. Dual decomposition and subgradient methods were used to find the optimal power allocation. The transmission process to exchange two different messages between two transceivers for two-way relaying technique takes place in two time slots. In the first slot, the transceivers transmit their signals simultaneously to the relay. Then, during the second slot the relay broadcasts its signal to the terminals. Moreover, improvement of both spectral and energy efficiency can be achieved compared with the one-way relaying technique. As an extension, a multiple relay selection for both one-way and two-way relaying under cognitive radio scenario using amplify-and-forward were discussed. A strong optimization tool based on genetic and iterative algorithms was employed to solve the 
formulated optimization problems for both single and multiple relay selection, where discrete relay power levels were considered. Simulation results show that the practical and low-complexity heuristic approaches achieve almost the same performance of the optimal relay selection schemes either with discrete or continuous power distributions while providing a considerable saving in terms of computational complexity.

  6. Exponential Separation of Quantum and Classical One-Way Communication Complexity for a Boolean Function

    CERN Document Server

    Gavinsky, D; Kempe, J; Gavinsky, Dmitry; Kempe, Julia; Wolf, Ronald de

    2006-01-01

    We give an exponential separation between one-way quantum and classical communication complexity for a Boolean function. Earlier such a separation was known only for a relation. A very similar result was obtained earlier but independently by Kerenidis and Raz [KR06]. Our version of the result gives an example in the bounded storage model of cryptography, where the key is secure if the adversary has a certain amount of classical storage, but is completely insecure if he has a similar amount of quantum storage.

  7. One-way hash function based on hyper-chaotic cellular neural network

    Institute of Scientific and Technical Information of China (English)

    Yang Qun-Ting; Gao Tie-Gang

    2008-01-01

    The design of an efficient one-way hash function with good performance is a hot spot in modern cryptography researches. In this paper, a hash function construction method based on cell neural network with hyper-chaos characteristics is proposed. First, the chaos sequence is gotten by iterating cellular neural network with Runge-Kutta algorithm, and then the chaos sequence is iterated with the message. The hash code is obtained through the corresponding transform of the latter chaos sequence. Simulation and analysis demonstrate that the new method has the merit of convenience, high sensitivity to initial values, good hash performance, especially the strong stability.

  8. Seismic Imaging, One-Way Wave Equations, Pseudodifferential Operators, Path Integrals, and all that Jazz

    Science.gov (United States)

    Artoun, Ojenie; David-Rus, Diana; Emmett, Matthew; Fishman, Lou; Fital, Sandra; Hogan, Chad; Lim, Jisun; Lushi, Enkeleida; Marinov, Vesselin

    2006-05-01

    In this report we summarize an extension of Fourier analysis for the solution of the wave equation with a non-constant coefficient corresponding to an inhomogeneous medium. The underlying physics of the problem is exploited to link pseudodifferential operators and phase space path integrals to obtain a marching algorithm that incorporates the backward scattering into the evolution of the wave. This allows us to successfully apply single-sweep, one-way marching methods in inherently two-way environments, which was not achieved before through other methods for this problem.

  9. One-way acoustic mirror based on anisotropic zero-index media

    Energy Technology Data Exchange (ETDEWEB)

    Gu, Zhong-ming; Liang, Bin, E-mail: liangbin@nju.edu.cn, E-mail: jccheng@nju.edu.cn; Yang, Jing; Cheng, Jian-chun, E-mail: liangbin@nju.edu.cn, E-mail: jccheng@nju.edu.cn [Key Laboratory of Modern Acoustics, MOE, Institute of Acoustics, Department of Physics, Nanjing University, Nanjing 210093 (China); Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093 (China); Zou, Xin-ye [Key Laboratory of Modern Acoustics, MOE, Institute of Acoustics, Department of Physics, Nanjing University, Nanjing 210093 (China); Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093 (China); State Key Laboratory of Acoustics, Chinese Academy of Sciences, Beijing 100190 (China); Li, Yong [CNRS, Institut Jean Lamour, Vandoeuvre-lès-Nancy F-54506, France and Institut Jean Lamour, Université de Lorraine, Boulevard des Aiguillettes, BP: 70239, 54506 Vandoeuvre-lès-Nancy (France); Yang, Jun [Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190 (China)

    2015-11-23

    We have designed a one-way acoustic mirror comprising anisotropic zero-index media. For acoustic beam incident at a particular angle, the designed structure behaves like a high-efficient mirror that redirects almost all the incident energy into another direction predicted by the Snell's law, while becoming virtually transparent to beams propagating reversely along this output path. Furthermore, the mirror can be tailored to work at arbitrary incident angle by simply adjusting its geometry. Our design, with undirectional reflection functionality and flexible working angle, may offer possibilities in space isolations and have deep implication in various scenarios like ultrasound imaging or noise control.

  10. Complete synchronization and generalized synchronization of one-way coupled time-delay systems.

    Science.gov (United States)

    Zhan, Meng; Wang, Xingang; Gong, Xiaofeng; Wei, G W; Lai, C-H

    2003-09-01

    The complete synchronization and generalized synchronization (GS) of one-way coupled time-delay systems are studied. We find that GS can be achieved by a single scalar signal, and its synchronization threshold for different delay times shows the parameter resonance effect, i.e., we can obtain stable synchronization at a smaller coupling if the delay time of the driven system is chosen such that it is in resonance with the driving system. Near chaos synchronization, the desynchronization dynamics displays periodic bursts with the period equal to the delay time of the driven system. These features can be easily applied to the recovery of time-delay systems.

  11. Efficient generation of scalable photon cluster states for one-way quantum computation

    CERN Document Server

    Wang, Hefeng; Nori, Franco

    2009-01-01

    We propose an efficient approach for generating scalable cluster states with photons. Our method operates essentially through unitary transformations performed on atoms coupled to optical cavities. We show that by using this approach, photon cluster states can be generated deterministically. The operation cost scales linearly with the number of qubits in the cluster state. Photon qubits are encoded such that single-qubit operations can be easily implemented by using linear optics. This approach opens a way for performing large-scale optical one-way quantum computation.

  12. One-way acoustic mirror based on anisotropic zero-index media

    International Nuclear Information System (INIS)

    We have designed a one-way acoustic mirror comprising anisotropic zero-index media. For acoustic beam incident at a particular angle, the designed structure behaves like a high-efficient mirror that redirects almost all the incident energy into another direction predicted by the Snell's law, while becoming virtually transparent to beams propagating reversely along this output path. Furthermore, the mirror can be tailored to work at arbitrary incident angle by simply adjusting its geometry. Our design, with undirectional reflection functionality and flexible working angle, may offer possibilities in space isolations and have deep implication in various scenarios like ultrasound imaging or noise control

  13. A Note on the Existence of the Posteriors for One-way Random Effect Probit Models.

    Science.gov (United States)

    Lin, Xiaoyan; Sun, Dongchu

    2010-01-01

    The existence of the posterior distribution for one-way random effect probit models has been investigated when the uniform prior is applied to the overall mean and a class of noninformative priors are applied to the variance parameter. The sufficient conditions to ensure the propriety of the posterior are given for the cases with replicates at some factor levels. It is shown that the posterior distribution is never proper if there is only one observation at each factor level. For this case, however, a class of proper priors for the variance parameter can provide the necessary and sufficient conditions for the propriety of the posterior.

  14. Multifunctional magneto-metasurface for terahertz one-way transmission and magnetic field sensing.

    Science.gov (United States)

    Chen, Sai; Fan, Fei; He, Xiaotong; Chen, Meng; Chang, Shengjiang

    2015-11-01

    A magneto-metasurface is demonstrated for one-way transmission of terahertz (THz) waves and magnetic field sensing. Due to the magneto-optical effect and the asymmetric structure of the transmission system, magnetoplasmon mode splitting for forward and backward THz waves and one-way transmission has been observed in this magneto-metasurface. Significantly, the resonance of the magneto-metasurface has been found that can remain at 0.750 THz at a temperature of 218 K, performing as a stable isolator with an isolation of larger than 30 dB within a magnetic field disturbance from 0.23 to 0.35 T. Also, since the resonance of the magneto-metasurface can be tuned by the different external magnetic fields at a temperature that is higher or lower than 218 K, the magneto-metasurface can work as a highly sensitive magnetic field sensor. The sensitivity of this device reaches S=513.05  GHz·T(-1) when T=230  K. This multifunctional magneto-metasurface has broad potential in THz application systems. PMID:26560571

  15. One Way Forward to Beat the Newtonian Habit with a Complexity Perspective on Organisational Change

    Directory of Open Access Journals (Sweden)

    Josie McLean

    2013-10-01

    Full Text Available We face a global crisis of un-sustainability—we need to change trajectory, but have so far displayed a collective inability to do so. This article suggests that one reason for this is our entrenched approach to change, which has inappropriately applied mechanistic Newtonian assumptions to “living” systems. Applying what has been learned about the behaviour of complex adaptive systems, we develop a pragmatic model for students of sustainability, who want to facilitate profound organizational and community change towards sustainability on the ground. Our model, “one way forward”, does not purport to be the only way but one possibility, grounded in a different understanding of the nature and dynamic of change as seen through the lens of complexity. In this way, it challenges more conventional change management practices. One way forward is a model facilitating evolutionary change in a social ecology—one possible expression of a “culture of community self-design” as expressed by Banathy. Its theoretical foundations and its practical application (it is designed for practice both have their source in a systemic view and in the principles that reflect the paradigm of complexity. Four central components of this new model—envisioning, core messages (values, indicators of progress, and experimentation—are explored in more detail.

  16. A Novel Feature Selection Based on One-Way ANOVA F-Test for E-Mail Spam Classification

    Directory of Open Access Journals (Sweden)

    Nadir Omer Fadl Elssied

    2014-01-01

    Full Text Available Spam is commonly defined as unwanted e-mails and it became a global threat against e-mail users. Although, Support Vector Machine (SVM has been commonly used in e-mail spam classification, yet the problem of high data dimensionality of the feature space due to the massive number of e-mail dataset and features still exist. To improve the limitation of SVM, reduce the computational complexity (efficiency and enhancing the classification accuracy (effectiveness. In this study, feature selection based on one-way ANOVA F-test statistics scheme was applied to determine the most important features contributing to e-mail spam classification. This feature selection based on one-way ANOVA F-test is used to reduce the high data dimensionality of the feature space before the classification process. The experiment of the proposed scheme was carried out using spam base well-known benchmarking dataset to evaluate the feasibility of the proposed method. The comparison is achieved for different datasets, categorization algorithm and success measures. In addition, experimental results on spam base English datasets showed that the enhanced SVM (FSSVM significantly outperforms SVM and many other recent spam classification methods for English dataset in terms of computational complexity and dimension reduction.

  17. Exponential separations for one-way quantum communication complexity, with applications to cryptography

    CERN Document Server

    Gavinsky, D; Kempe, J; Kerenidis, I; Raz, R; Gavinsky, Dmitry; Kempe, Julia; Kerenidis, Iordanis; Raz, Ran; Wolf, Ronald de

    2006-01-01

    We give an exponential separation between one-way quantum and classical communication protocols for two partial Boolean functions, both of which are variants of the Boolean Hidden Matching Problem of Bar-Yossef et al. Earlier such an exponential separation was known only for a relational version of the Hidden Matching Problem. Our proofs use the Fourier coefficients inequality of Kahn, Kalai, and Linial. We also give a number of applications of this separation. In particular, we provide the first example in the bounded storage model of cryptography where the key is secure if the adversary has a certain amount of classical storage, but is completely insecure if he has a similar (or even much smaller) amount of \\emph{quantum} storage. Moreover, in the setting of privacy amplification, we show that there exist extractors which yield a classically secure key, but are insecure against a quantum adversary.

  18. Demonstration of a controlled-phase gate for continuous-variable one-way quantum computation.

    Science.gov (United States)

    Ukai, Ryuji; Yokoyama, Shota; Yoshikawa, Jun-ichi; van Loock, Peter; Furusawa, Akira

    2011-12-16

    We experimentally demonstrate a controlled-phase gate for continuous variables using a cluster-state resource of four optical modes. The two independent input states of the gate are coupled with the cluster in a teleportation-based fashion. As a result, one of the entanglement links present in the initial cluster state appears in the two unmeasured output modes as the corresponding entangling gate acting on the input states. The genuine quantum character of this gate becomes manifest and is verified through the presence of entanglement at the output for a product two-mode coherent input state. By combining our gate with the recently reported module for single-mode Gaussian operations [R. Ukai et al., Phys. Rev. Lett. 106, 240504 (2011)], it is possible to implement any multimode Gaussian operation as a fully measurement-based one-way quantum computation. PMID:22243056

  19. One-way hash function construction based on the spatiotemporal chaotic system

    Institute of Scientific and Technical Information of China (English)

    Luo Yu-Ling; Du Ming-Hui

    2012-01-01

    Based on the spatiotemporal chaotic system,a novel algorithm for constructing a one-way hash function is proposed and analysed.The message is divided into fixed length blocks.Each message block is processed by the hash compression function in parallel.The hash compression is constructed based on the spatiotemporal chaos.In each message block,the ASCII code and its position in the whole message block chain constitute the initial conditions and the key of the hash compression function.The final hash value is generated by further compressing the mixed result of all the hash compression values.Theoretic analyses and numerical simulations show that the proposed algorithm presents high sensitivity to the message and key,good statistical properties,and strong collision resistance.

  20. One-way Hash function construction based on the chaotic map with changeable-parameter

    International Nuclear Information System (INIS)

    An algorithm for one-way Hash function construction based on the chaotic map with changeable-parameter is proposed in this paper. A piecewise linear chaotic map with changeable-parameter P is chosen, and cipher block chaining mode (CBC) is introduced to ensure that the parameter P in each iteration is dynamically decided by the last-time iteration value and the corresponding message bit in different positions. The final Hash value is obtained by means of the linear transform on the iteration sequence. Theoretical analysis and computer simulation indicate that our algorithm can satisfy all the performance requirements of Hash function in an efficient and flexible manner. It is practicable and reliable, with high potential to be adopted for E-commerce

  1. One-way sequencing of multiple amplicons from tandem repetitive mitochondrial DNA control region.

    Science.gov (United States)

    Xu, Jiawu; Fonseca, Dina M

    2011-10-01

    Repetitive DNA sequences not only exist abundantly in eukaryotic nuclear genomes, but also occur as tandem repeats in many animal mitochondrial DNA (mtDNA) control regions. Due to concerted evolution, these repetitive sequences are highly similar or even identical within a genome. When long repetitive regions are the targets of amplification for the purpose of sequencing, multiple amplicons may result if one primer has to be located inside the repeats. Here, we show that, without separating these amplicons by gel purification or cloning, directly sequencing the mitochondrial repeats with the primer outside repetitive region is feasible and efficient. We exemplify it by sequencing the mtDNA control region of the mosquito Aedes albopictus, which harbors typical large tandem DNA repeats. This one-way sequencing strategy is optimal for population surveys.

  2. One-way ticket” Romanian Migration at the beginning of the 20th century

    Directory of Open Access Journals (Sweden)

    Silvia Bocancea

    2011-12-01

    Full Text Available Unlike the new age of migration that we are experiencing now, the social mobility specific to the end of the 19th century and the beginning of the 20th century may be defined by the expression “one way ticket”; the immigrant, usually a man, used to leave his country of origin and settle for good in his host-country (he did not look for his happiness from state to state, as it happens now. The Romanian migration of that time was directed mainly towards the New World (particularly to the USA, and less to Canada. This paper is an attempt to sketch the image of Romanian emigration by taking into account the peculiarities determined by: emigration causes, geographical predominance, social composition, occupational options in the host-country, and the structure of Romanian immigrant communities.

  3. A Novel Approach for Verifiable Secret Sharing by using a One Way Hash Function

    CERN Document Server

    Parmar, Keyur

    2012-01-01

    Threshold secret sharing schemes do not prevent any malicious behavior of the dealer or shareholders and so we need verifiable secret sharing, to detect and identify the cheaters, to achieve fair reconstruction of a secret. The problem of verifiable secret sharing is to verify the shares distributed by the dealer. A novel approach for verifiable secret sharing is presented in this paper where both the dealer and shareholders are not assumed to be honest. In this paper, we extend the term verifiable secret sharing to verify the shares, distributed by a dealer as well as shares submitted by shareholders for secret reconstruction, and to verify the reconstructed secret. Our proposed scheme uses a one way hash function and probabilistic homomorphic encryption function to provide verifiability and fair reconstruction of a secret.

  4. Surface plasmon polaritons one-way mode converter based on parity-time symmetry broken system

    Science.gov (United States)

    Yan, Xiang-An; Liu, Hanchen; Zhu, Changjun

    2016-03-01

    In this paper, we have proposed a novel periodic surface plasmon polariton (SPP) waveguide to realize a one-way mode converter which is based on a parity-time (PT) symmetry broken system, and it converts the fundamental TM mode to the first-order TM mode in only forward direction. Periodic gain potentials are put in place to construct the system mentioned in periodic SPP waveguide. Further, as the mode converter contains gain and loss material, light signals will be amplified when it propagates forward, and they will be attenuated toward when they propagate backward. The unidirectional mode converter has wide applications in nonlinearity induced isolation, mode insensitive element and on-chip mode locked laser.

  5. An efficient authentication scheme based on one-way key chain for sensor network

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    To strike a tradeoff between the security and the consumption of energy, computing and communication resources in the nodes, this paper presents an efficient authentication scheme based on one-way key chain for sensor network. The scheme can provide immediate authentication to fulfill the latency and the storage requirements and defends against various attacks such as replay, impersonation and denial of service. Meanwhile,our scheme possesses low overhead and scalability to large networks. Furthermore, the simple related protocols or algorithms in the scheme and inexpensive public-key operation required in view of resource-starved sensor nodes minimize the storage, computation and communication overhead, and improve the efficiency of our scheme. In addition, the proposed scheme also supports source authentication without precluding in-network processing and passive participation.

  6. Acoustic one-way metasurfaces: Asymmetric Phase Modulation of Sound by Subwavelength Layer

    Science.gov (United States)

    Jiang, Xue; Liang, Bin; Zou, Xin-Ye; Yang, Jing; Yin, Lei-Lei; Yang, Jun; Cheng, Jian-Chun

    2016-06-01

    We theoretically design and numerically demonstrate an acoustic one-way metasurface, which is a planar and acoustically subwavelength layer behaving like a nearly-reflectionless surface with arbitrary wave-steering capability for incident wave impinging on one side, while virtually blocking the reversed wave. The underlying mechanism is based on an asymmetric phase modulation by coupling a phase array and a near-zero-index medium. We exemplify a metastructure-based implementation by combining the hybrid metastuctures and labyrinthine structures. Moreover, the performance of the proposed implementation is demonstrated via three distinct phenomena of anomalous refraction, wave splitting and conversion of propagation wave to surface wave. Our findings may offer more possibilities for sound manipulation and improve the application potential of acoustic artificial devices in situations such as ultrasonic imaging and therapy.

  7. Quantum public-key cryptosystems based on induced trapdoor one-way transformations

    CERN Document Server

    Yang, Li; Li, Bao; Hu, Lei; Feng, Deng-Guo

    2010-01-01

    A concept named induced trapdoor one-way quantum transformation (OWQT) has been introduced, and a theoretical framework of public-key encryption (PKE) of quantum message is presented based on it. Then several kinds of quantum public-key encryption (QPKE) protocols, such as quantum version PKE of RSA, ElGamal, Goldwasser-Micali, elliptic curve, McEliece, Niederreiter and Okamoto-Tanaka-Uchiyama, are given within this framework. Though all of these protocols are only computationally secure, the last three are probably secure in post-quantum era. Besides, theoretical frameworks for public-key authentication and signature of quantum message are also given based on the induced trapdoor OWQT. As examples, a public-key authentication protocol of quantum message based on SN-S authentication scheme and two quantum digital signature protocols based on RSA and McEliece algorithms respectively are presented.

  8. Scalable one-way quantum computer using on-chip resonator qubits

    CERN Document Server

    Wu, Chun-Wang; Li, Hong-Yi; Deng, Zhi-Jiao; Dai, Hong-Yi; Chen, Ping-Xing; Li, Cheng-Zu

    2011-01-01

    We propose a scalable and robust architecture for one-way quantum computation using coupled networks of superconducting transmission line resonators. In our protocol, quantum information is encoded into the long-lived photon states of the resonators, which have a much longer coherence time than the usual superconducting qubits. Each resonator contains a charge qubit used for the state initialization and local projective measurement of the photonic qubit. Any pair of neighboring photonic qubits are coupled via a mediator charge qubit, and large photonic cluster states can be created by applying Stark-shifted Rabi pulses to these mediator qubits. The distinct advantage of our architecture is that it combines both the excellent scalability of the solid-state systems and the long coherence time of the photonic qubits. Furthermore, this architecture is very robust against the parameter variations.

  9. A new non-uniform blast load model for SDOF method of one-way reinforced concrete slab

    Directory of Open Access Journals (Sweden)

    Wang S.-C.

    2012-08-01

    Full Text Available A new effective model for calculation of the equivalent uniform blast load for non-uniform blast load such as close-in explosion of a one-way square and rectangle reinforced concrete slab is proposed in this paper. The model is then validated using single degree of freedom (SDOF system with the experiments and blast tests for square slabs and rectangle slabs. Test results showed that the model is accurate in predicting the explosive charge weight and stand-off distance to impose a given damage level on the tested RC slabs especially for close-in blast load. It is shown that the new model is more accurate than the conventional SDOF analysis and is running faster than the FE analysis.

  10. Comparing One-way and Two-way Coupled Hydrometeorological Forecasting Systems for Flood Forecasting in the Mediterranean Region

    Science.gov (United States)

    Givati, Amir; Gochis, David; Rummler, Thomas; Kunstmann, Harald; Yu, Wei

    2016-04-01

    A pair of hydro-meteorological modeling systems were calibrated and evaluated for the Ayalon basin in central Israel to assess the advantages and limitations of one-way versus two-way coupled modeling systems for flood prediction. The models used included the Hydrological Engineering Center-Hydrological Modeling System (HEC-HMS) model and the Weather Research and Forecasting (WRF) Hydro modeling system. The models were forced by observed, interpolated precipitation from rain-gauges within the basin, and with modeled precipitation from the WRF atmospheric model. Detailed calibration and evaluation was carried out for two major winter storms in January and December 2013. Then both modeling systems were executed and evaluated in an operational mode for the full 2014/2015 rainy season. Outputs from these simulations were compared to observed measurements from hydrometric stations at the Ayalon basin outlet. Various statistical metrics were employed to quantify and analyze the results: correlation, Root Mean Square Error (RMSE) and the Nash-Sutcliffe (NS) efficiency coefficient. Foremost, the results presented in this study highlight the sensitivity of hydrological responses to different sources of precipitation data, and less so, to hydrologic model formulation. With observed precipitation data both calibrated models closely simulated the observed hydrographs. The two-way coupled WRF/WRF-Hydro modeling system produced improved both the precipitation and hydrological simulations as compared to the one-way WRF simulations. Findings from this study suggest that the use of two-way atmospheric-hydrological coupling has the potential to improve precipitation and, therefore, hydrological forecasts for early flood warning applications. However more research needed in order to better understand the land-atmosphere coupling mechanisms driving hydrometeorological processes on a wider variety precipitation and terrestrial hydrologic systems.

  11. Comparing One-Way and Two-Way Coupled Hydrometeorological Forecasting Systems for Flood Forecasting in the Mediterranean Region

    Directory of Open Access Journals (Sweden)

    Amir Givati

    2016-05-01

    Full Text Available A pair of hydro-meteorological modeling systems were calibrated and evaluated for the Ayalon basin in central Israel to assess the advantages and limitations of one-way versus two-way coupled modeling systems for flood prediction. The models used included the Hydrological Engineering Center-Hydrological Modeling System (HEC-HMS model and the Weather Research and Forecasting (WRF Hydro modeling system. The models were forced by observed, interpolated precipitation from rain-gauges within the basin, and with modeled precipitation from the WRF atmospheric model. Detailed calibration and evaluation was carried out for two major winter storms in January and December 2013. Then, both modeling systems were executed and evaluated in an operational mode for the full 2014/2015 rainy season. Outputs from these simulations were compared to observed measurements from the hydrometric station at the Ayalon basin outlet. Various statistical metrics were employed to quantify and analyze the results: correlation, Root Mean Square Error (RMSE and the Nash–Sutcliffe (NS efficiency coefficient. Foremost, the results presented in this study highlight the sensitivity of hydrological responses to different sources of simulated and observed precipitation data, and demonstrate improvement, although not significant, at the Hydrological response, like simulated hydrographs. With observed precipitation data both calibrated models closely simulated the observed hydrographs. The two-way coupled WRF/WRF-Hydro modeling system produced improved both the precipitation and hydrological simulations as compared to the one-way WRF simulations. Findings from this study, as well as previous studies, suggest that the use of two-way atmospheric-hydrological coupling has the potential to improve precipitation and, therefore, hydrological forecasts for early flood warning applications. However, more research needed in order to better understand the land-atmosphere coupling mechanisms

  12. Analyzing social experiments as implemented: Evidence from the HighScope Perry Preschool Program

    OpenAIRE

    Heckman, James; Moon, Seong Hyeok; Pinto, Rodrigo; Savelyev, Peter; Yavitz, Adam

    2010-01-01

    Social experiments are powerful sources of information about the effectiveness of interventions. In practice, initial randomization plans are almost always compromised. Multiple hypotheses are frequently tested. "Significant" effects are often reported with p-values that do not account for preliminary screening from a large candidate pool of possible effects. This paper develops tools for analyzing data from experiments as they are actually implemented. We apply these tools to analyze the inf...

  13. The Galactic One-Way Shapiro Delay to PSR B1937+21

    CERN Document Server

    Desai, S

    2015-01-01

    The time delay experienced by a light ray as it passes through a changing gravitational potential by a non-zero mass distribution along the line of sight is usually referred to as Shapiro delay. Shapiro delay has been extensively measured in the Solar system and in binary pulsars, enabling stringent tests of general relativity as well as measurement of neutron star masses . However, Shapiro delay is ubiquitous and experienced by all astrophysical messengers on their way from the source to the Earth. We calculate the "one-way" static Shapiro delay for the first discovered millisecond pulsar PSR~B1937+21, by including the contributions from both the dark matter and baryonic matter between this pulsar and the Earth. We find a value of approximately 5 days (of which 4.74 days is from the dark matter and 0.22 days from the baryonic matter). We also calculate the modulation of Shapiro delay from the motion of a single dark matter halo, and also evaluate the cumulative effects of the motion of matter distribution on...

  14. Delay or anticipatory synchronization in one-way coupled systems using variable delay with reset

    Indian Academy of Sciences (India)

    G Ambika; R E Amritkar

    2011-11-01

    We present a mechanism for the synchronization of one-way coupled nonlinear systems in which the coupling uses a variable delay, that is reset at finite intervals. Here the delay varies in the same way as the system in time and so the coupling function remains constant for the reset interval at the end of which it is reset to the value at that time. This leads to a novel and discrete error dynamics and the resulting general stability analysis is applicable to chaotic or hyperchaotic systems. We apply this method to standard chaotic systems and hyperchaotic time delay systems. The results of the detailed numerical analysis agree with the results from stability analysis in both cases. This method has the advantage that it is cost-effective since information from the driving system is needed only at intervals of reset. Further, in the context of time delay systems, optimization among the different time-scales depending upon the application is possible due to the flexibility among the four different time-scales in our method, viz. delay in the driving system, anticipation in the response system, system delay time and reset time. We suggest a bi-channel scheme for implementing this method in communication field with enhanced security

  15. One-way approximation for the simulation of weak shock wave propagation in atmospheric flows.

    Science.gov (United States)

    Gallin, Louis-Jonardan; Rénier, Mathieu; Gaudard, Eric; Farges, Thomas; Marchiano, Régis; Coulouvrat, François

    2014-05-01

    A numerical scheme is developed to simulate the propagation of weak acoustic shock waves in the atmosphere with no absorption. It generalizes the method previously developed for a heterogeneous medium [Dagrau, Rénier, Marchiano, and Coulouvrat, J. Acoust. Soc. Am. 130, 20-32 (2011)] to the case of a moving medium. It is based on an approximate scalar wave equation for potential, rewritten in a moving time frame, and separated into three parts: (i) the linear wave equation in a homogeneous and quiescent medium, (ii) the effects of atmospheric winds and of density and speed of sound heterogeneities, and (iii) nonlinearities. Each effect is then solved separately by an adapted method: angular spectrum for the wave equation, finite differences for the flow and heterogeneity corrections, and analytical method in time domain for nonlinearities. To keep a one-way formulation, only forward propagating waves are kept in the angular spectrum part, while a wide-angle parabolic approximation is performed on the correction terms. The numerical process is validated in the case of guided modal propagation with a shear flow. It is then applied to the case of blast wave propagation within a boundary layer flow over a flat and rigid ground. PMID:24815240

  16. Two-factor authentication system based on optical interference and one-way hash function

    Science.gov (United States)

    He, Wenqi; Peng, Xiang; Meng, Xiangfeng; Liu, Xiaoli

    2012-10-01

    We present a two-factor authentication method to verify the personal identification who tries to access an optoelectronic system. This method is based on the optical interference principle and the traditional one-way Hash function (e.g. MD5). The authentication process is straightforward, the phase key and the password-controlled phase lock of one user are loading on two Spatial Light Modulators (SLMs) in advance, by which two coherent beams are modulated and then interference with each other at the output plane leading to an output image. By comparing the output image with all the standard certification images in the database, the system can thus verify the user's identity. However, the system designing process involves an iterative Modified Phase Retrieval Algorithm (MPRA). For an uthorized user, a phase lock is first created based on a "Digital Fingerprint (DF)", which is the result of a Hash function on a preselected user password. The corresponding phase key can then be determined by use of the phase lock and a designated standard certification image. Note that the encode/design process can only be realized by digital means while the authentication process could be achieved digitally or optically. Computer simulations were also given to validate the proposed approach.

  17. Design and analysis of logarithmic spiral type sprag one-way clutch

    Institute of Scientific and Technical Information of China (English)

    刘志辉; 严宏志; 曹煜明

    2015-01-01

    A complete mathematical model for logarithmic spiral type sprag one-way clutch design and analysis is given. It assumes that the motion of all clutch components can be expressed by a model of epicyclic gearing. It takes advantage of Hunt-Crossley contact impact theory to calculate the contact forces between sprags and races, and it can be used for optimization of design and comparison with other types of sprag clutches. A good deal of analysis shows that the parameters of the steady windup angle, the steady contact force, the natural frequency and natural cycle of clutch have nothing to do with the initial velocity of outer race, while the parameters of the maximum transient windup angle, the maximum transient impact force and the steady engagement time increase linearly in the mode of engaging operation of clutch. It is also shown that the strut angle has great influence on the dynamic engagement performance of clutch. The parameters of the steady windup angle, the maximum transient windup angle, the steady engaging time, the steady contact force, the maximum transient impact force and the natural cycle of clutch decrease linearly nearly with the inner strut angle, while the natural frequency of the system increases linearly with the inner strut angle.

  18. Analyzing impact of experience curve on ROI in the software product line adoption process

    NARCIS (Netherlands)

    Tüzün, E.; Tekinerdogan, B.

    2015-01-01

    Context Experience curve is a well-known concept in management and education science, which explains the phenomenon of increased worker efficiency with repetitive production of a good or service. Objective We aim to analyze the impact of the experience curve effect on the Return on Investment (ROI)

  19. Manipulating one-way space wave and its refraction by time-reversal and parity symmetry breaking.

    Science.gov (United States)

    Poo, Yin; He, Cheng; Xiao, Chao; Lu, Ming-Hui; Wu, Rui-Xin; Chen, Yan-Feng

    2016-01-01

    One-way transmission and negative refraction are the exotic wave properties founded in photonic crystals which attract a great attention due to their promising applications in photonic devices. How to integrate such two phenomena in one material or device is interesting and valuable. In this work, we theoretically and experimentally demonstrate that one-way electromagnetic space wave can be realized by means of two-dimensional magnetic photonic crystals. Simultaneously breaking the time-reversal and parity symmetries of the magnetic photonic crystals designed, we observe oblique incident space wave propagating one-way in the magnetic photonic crystals with positive or negative refraction occurring at interfaces, which can be manipulated upon the incident angle and operating frequency. Our work may offer a potential platform to realize some exotic photoelectronic and microwave devices such as one-way imaging and one-way cloaking. PMID:27387438

  20. Joint Preprocesser-Based Detectors for One-Way and Two-Way Cooperative Communication Networks

    KAUST Repository

    Abuzaid, Abdulrahman I.

    2014-05-01

    Efficient receiver designs for cooperative communication networks are becoming increasingly important. In previous work, cooperative networks communicated with the use of L relays. As the receiver is constrained, channel shortening and reduced-rank techniques were employed to design the preprocessing matrix that reduces the length of the received vector from L to U. In the first part of the work, a receiver structure is proposed which combines our proposed threshold selection criteria with the joint iterative optimization (JIO) algorithm that is based on the mean square error (MSE). Our receiver assists in determining the optimal U. Furthermore, this receiver provides the freedom to choose U for each frame depending on the tolerable difference allowed for MSE. Our study and simulation results show that by choosing an appropriate threshold, it is possible to gain in terms of complexity savings while having no or minimal effect on the BER performance of the system. Furthermore, the effect of channel estimation on the performance of the cooperative system is investigated. In the second part of the work, a joint preprocessor-based detector for cooperative communication networks is proposed for one-way and two-way relaying. This joint preprocessor-based detector operates on the principles of minimizing the symbol error rate (SER) instead of minimizing MSE. For a realistic assessment, pilot symbols are used to estimate the channel. From our simulations, it can be observed that our proposed detector achieves the same SER performance as that of the maximum likelihood (ML) detector with all participating relays. Additionally, our detector outperforms selection combining (SC), channel shortening (CS) scheme and reduced-rank techniques when using the same U. Finally, our proposed scheme has the lowest computational complexity.

  1. One-way-coupling simulation of cavitation accompanied by high-speed droplet impact

    Science.gov (United States)

    Kondo, Tomoki; Ando, Keita

    2016-03-01

    Erosion due to high-speed droplet impact is a crucial issue in industrial applications. The erosion is caused by the water-hammer loading on material surfaces and possibly by the reloading from collapsing cavitation bubbles that appear within the droplet. Here, we simulate the dynamics of cavitation bubbles accompanied by high-speed droplet impact against a deformable wall in order to see whether the bubble collapse is violent enough to give rise to cavitation erosion on the wall. The evolution of pressure waves in a single water (or gelatin) droplet to collide with a deformable wall at speed up to 110 m/s is inferred from simulations of multicomponent Euler flow where phase changes are not permitted. Then, we examine the dynamics of cavitation bubbles nucleated from micron/submicron-sized gas bubble nuclei that are supposed to exist inside the droplet. For simplicity, we perform Rayleigh-Plesset-type calculations in a one-way-coupling manner, namely, the bubble dynamics are determined according to the pressure variation obtained from the Euler flow simulation. In the simulation, the preexisting bubble nuclei whose size is either micron or submicron show large growth to submillimeters because tension inside the droplet is obtained through interaction of the pressure waves and the droplet interface; this supports the possibility of having cavitation due to the droplet impact. It is also found, in particular, for the case of cavitation arising from very small nuclei such as nanobubbles, that radiated pressure from the cavitation bubble collapse can overwhelm the water-hammer pressure directly created by the impact. Hence, cavitation may need to be accounted for when it comes to discussing erosion in the droplet impact problem.

  2. Randomized dynamical decoupling strategies and improved one-way key rates for quantum cryptography

    International Nuclear Information System (INIS)

    The present thesis deals with various methods of quantum error correction. It is divided into two parts. In the first part, dynamical decoupling methods are considered which have the task of suppressing the influence of residual imperfections in a quantum memory. Such imperfections might be given by couplings between the finite dimensional quantum systems (qudits) constituting the quantum memory, for instance. The suppression is achieved by altering the dynamics of an imperfect quantum memory with the help of a sequence of local unitary operations applied to the qudits. Whereas up to now the operations of such decoupling sequences have been constructed in a deterministic fashion, strategies are developed in this thesis which construct the operations by random selection from a suitable set. Formulas are derived which estimate the average performance of such strategies. As it turns out, randomized decoupling strategies offer advantages and disadvantages over deterministic ones. It is possible to benefit from the advantages of both kind of strategies by designing combined strategies. Furthermore, it is investigated if and how the discussed decoupling strategies can be employed to protect a quantum computation running on the quantum memory. It is shown that a purely randomized decoupling strategy may be used by applying the decoupling operations and adjusted gates of the quantum algorithm in an alternating fashion. Again this method can be enhanced by the means of deterministic methods in order to obtain a combined decoupling method for quantum computations analogously to the combining strategies for quantum memories. The second part of the thesis deals with quantum error-correcting codes and protocols for quantum key distribution. The focus is on the BB84 and the 6-state protocol making use of only one-way communication during the error correction and privacy amplification steps. It is shown that by adding additional errors to the preliminary key (a process called

  3. Randomized dynamical decoupling strategies and improved one-way key rates for quantum cryptography

    Energy Technology Data Exchange (ETDEWEB)

    Kern, Oliver

    2009-05-25

    The present thesis deals with various methods of quantum error correction. It is divided into two parts. In the first part, dynamical decoupling methods are considered which have the task of suppressing the influence of residual imperfections in a quantum memory. Such imperfections might be given by couplings between the finite dimensional quantum systems (qudits) constituting the quantum memory, for instance. The suppression is achieved by altering the dynamics of an imperfect quantum memory with the help of a sequence of local unitary operations applied to the qudits. Whereas up to now the operations of such decoupling sequences have been constructed in a deterministic fashion, strategies are developed in this thesis which construct the operations by random selection from a suitable set. Formulas are derived which estimate the average performance of such strategies. As it turns out, randomized decoupling strategies offer advantages and disadvantages over deterministic ones. It is possible to benefit from the advantages of both kind of strategies by designing combined strategies. Furthermore, it is investigated if and how the discussed decoupling strategies can be employed to protect a quantum computation running on the quantum memory. It is shown that a purely randomized decoupling strategy may be used by applying the decoupling operations and adjusted gates of the quantum algorithm in an alternating fashion. Again this method can be enhanced by the means of deterministic methods in order to obtain a combined decoupling method for quantum computations analogously to the combining strategies for quantum memories. The second part of the thesis deals with quantum error-correcting codes and protocols for quantum key distribution. The focus is on the BB84 and the 6-state protocol making use of only one-way communication during the error correction and privacy amplification steps. It is shown that by adding additional errors to the preliminary key (a process called

  4. Analyzing and understanding cultural differences : experiences from education in Library and Information Studies

    OpenAIRE

    Iivonen, M.; Sonnenwald, D. H.; Parma, M; Poole-Kober, E.

    1998-01-01

    In the paper the need to understand cultural differences is discussed. The authors show how cultural differences can be analyzed. They also describe how cultural information was exchanged and analyzed during the library and information studies course that was taught via the Internet simultanously in Finland and North Carolina. In addition, the authors discuss how libraries could use experiences of the common class when they act in a multicultural environment. In the paper, culture is defin...

  5. A Scalable, Self-Analyzing Digital Locking System for use on Quantum Optics Experiments

    OpenAIRE

    Sparkes, B. M.; Chrzanowski, H. M.; Parrain, D. P.; Buchler, B. C.; Lam, P. K.; Symul, T.

    2011-01-01

    Digital control of optics experiments has many advantages over analog control systems, specifically in terms of scalability, cost, flexibility, and the integration of system information into one location. We present a digital control system, freely available for download online, specifically designed for quantum optics experiments that allows for automatic and sequential re-locking of optical components. We show how the inbuilt locking analysis tools, including a white-noise network analyzer,...

  6. Super One-Way Information Deficit for A Two-Parameter Class of States In 2 ⊗ D Quantum Systems

    Science.gov (United States)

    Faizi, E.; Eftekhari, H.

    2016-08-01

    So far, the super one-way deficit in weak measurement has been calculated explicitly only for a limited set of two-qubit quantum states and expressions for more general states are not known. In this paper, we extend the previous studies to 2 ⊗ d quantum systems and derive an analytical expression for a two-parameter class of states for d ≥ 3. We compare quantum discord and super one-way deficit for qubit-qutrit systems. We find that super one-way deficit is smaller than the quantum discord. On the other hand, by tuning the weak measurement continuously to the projective measurement, both super one-way deficit and quantum discord converge to the same value.

  7. Composite one-way transmission waveguide based on the curved metal slit and 1D photonic crystal

    Directory of Open Access Journals (Sweden)

    Qi Gao

    2016-10-01

    Full Text Available The one-way devices in optical circuits are the key components just as the diodes in electric circuits, which allow the light going in only one direction. A novel one-way transmission structure is proposed which is a curved waveguide containing a confined photonic crystal. When the waveguide is made of perfect electric conductor, the exact calculation results demonstrate that the device shows excellent one-way properties. The forward transmissivity approaches 100% and the largest transmission ratio exceeds 100.92N, where N is the cell number of the photonic crystal in the structure. When the waveguide is made of real metal, the device also presents excellent one-way transmission properties, which can be confirmed by an approximate calculation as well as by the simulation. In working region, the lowest forward tranmissivity is about 30% and the largest one exceeds 70%. The highest transmission ratio exceeds 104.

  8. One-way domain decomposition method with exact radiation condition and fast GMRES solver for the solution of Maxwell's equations

    Science.gov (United States)

    Stupfel, Bruno; Lecouvez, Matthieu

    2016-10-01

    For the solution of the time-harmonic electromagnetic scattering problem by inhomogeneous 3-D objects, a one-way domain decomposition method (DDM) is considered: the computational domain is partitioned into concentric subdomains on the interfaces of which Robin-type transmission conditions (TCs) are prescribed; an integral representation of the electromagnetic fields on the outer boundary constitutes an exact radiation condition. The global system obtained after discretization of the finite element (FE) formulations is solved via a Krylov subspace iterative method (GMRES). It is preconditioned in such a way that, essentially, only the solution of the FE subsystems in each subdomain is required. This is made possible by a computationally cheap H (curl)- H (div) transformation performed on the interfaces that separate the two outermost subdomains. The eigenvalues of the preconditioned matrix of the system are bounded by two, and optimized values of the coefficients involved in the local TCs on the interfaces are determined so as to maximize the minimum eigenvalue. Numerical experiments are presented that illustrate the numerical accuracy of this technique, its fast convergence, and legitimate the choices made for the optimized coefficients.

  9. Effects of Professional Experience and Group Interaction on Information Requested in Analyzing IT Cases

    Science.gov (United States)

    Lehmann, Constance M.; Heagy, Cynthia D.

    2008-01-01

    The authors investigated the effects of professional experience and group interaction on the information that information technology professionals and graduate accounting information system (AIS) students request when analyzing business cases related to information systems design and implementation. Understanding these effects can contribute to…

  10. There's More Than One Way To Skin a Cat: How Community College Presidents Frame Change.

    Science.gov (United States)

    Eddy, Pamela L.

    This paper presents a study that analyzed the ways in which community college presidents define and disseminate information on institutional and organizational change. It identifies three courses of change on community college campuses: presidential initiatives, internal pressures, and external pressures. The study centered on the presidents'…

  11. One way and the other: the bidirectional relationship between ambivalence and body movement

    NARCIS (Netherlands)

    I.K. Schneider; A. Eerland; F. van Harreveld; M. Rotteveel; J. van der Pligt; N. van der Stoep; R.A. Zwaan

    2013-01-01

    Prior research exploring the relationship between evaluations and body movements has focused on one-sided evaluations. However, people regularly encounter objects or situations about which they simultaneously hold both positive and negative views, which results in the experience of ambivalence. Such

  12. One Way to Eliminate Corruption—Educating People——Brief Introduction on Bid

    Institute of Scientific and Technical Information of China (English)

    QiuShi-feng; YangRu-ping

    2001-01-01

    This article,according to the author's working experience in a hydropower project,briefly introduces some basic knowledge about bidding process and sample contract document.It is aiming at giving a common knowledge to the students who will be involved in work relating to bid after their graduation in the college.It is hoped that this kind of knowledge can help people properly use funds for a project and thus corruption can be minimized.

  13. Neutrinoless double beta decay experiment DCBA using a magnetic momentum-analyzer

    Energy Technology Data Exchange (ETDEWEB)

    Ishihara, N., E-mail: nobuhiro.ishihara@kek.jp [High Energy Accelerator Research Organization (KEK), Tsukuba, 305-0801 (Japan); Kato, Y.; Inagaki, T.; Ohama, T.; Takeda, S.; Yamada, Y. [High Energy Accelerator Research Organization (KEK), Tsukuba, 305-0801 Japan (Japan); Ukishima, N.; Teramoto, Y. [Osaka City University, Sumiyoshi, Osaka, 558-8585 (Japan); Morishima, Y.; Nakano, I. [Okayama University, Okayama, 700-8530 (Japan); Kitamura, S. [Tokyo Metropolitan University, Arakawa, Tokyo, 116-8551 (Japan); Sakamoto, Y. [Tohoku Gakuin University, Izumi, Sendai, 981-3193 (Japan); Nagasaka, Y. [Hiroshima Institute of Technology, Saeki, Hiroshima, 731-5193 (Japan); Tamura, N. [Niigata University, Niigata, 950-2181 (Japan); Tanaka, K. [BTE, Minato, Tokyo, 105-0011 (Japan); Ito, R. [ZTJ, Chiyoda, Tokyo, 101-0047 (Japan)

    2011-12-15

    A magnetic momentum-analyzer is being developed at KEK for neutrinoless double beta decay experiment called DCBA (Drift Chamber Beta-ray Analyzer, inverted ABCD). A lot of thin plates of {sup 150}Nd compound are installed in tracking detectors located in a uniform magnetic field. The three-dimensional position information is obtained for the helical track of a beta ray. More R and D will be studied using the second test apparatus DCBA-T2, which is now under construction.

  14. Alternatives to F-Test in One Way ANOVA in case of heterogeneity of variances (a simulation study

    Directory of Open Access Journals (Sweden)

    Karl Moder

    2010-12-01

    Full Text Available Several articles deal with the effects of inhomogeneous variances in one way analysis of variance (ANOVA. A very early investigation of this topic was done by Box (1954. He supposed, that in balanced designs with moderate heterogeneity of variances deviations of the empirical type I error rate (on experiments based realized α to the nominal one (predefined α for H0 are small. Similar conclusions are drawn by Wellek (2003. For not so moderate heterogeneity (e.g. σ1:σ2:...=3:1:... Moder (2007 showed, that empirical type I error rate is far beyond the nominal one, even with balanced designs. In unbalanced designs the difficulties get bigger. Several attempts were made to get over this problem. One proposal is to use a more stringent α level (e.g. 2.5% instead of 5% (Keppel & Wickens, 2004. Another recommended remedy is to transform the original scores by square root, log, and other variance reducing functions (Keppel & Wickens, 2004, Heiberger & Holland, 2004. Some authors suggest the use of rank based alternatives to F-test in analysis of variance (Vargha & Delaney, 1998. Only a few articles deal with two or multifactorial designs. There is some evidence, that in a two or multi-factorial design type I error rate is approximately met if the number of factor levels tends to infinity for a certain factor while the number of levels is fixed for the other factors (Akritas & S., 2000, Bathke, 2004.The goal of this article is to find an appropriate location test in an oneway analysis of variance situation with inhomogeneous variances for balanced and unbalanced designs based on a simulation study.

  15. There's more than one way to conduct a replication study: Beyond statistical significance.

    Science.gov (United States)

    Anderson, Samantha F; Maxwell, Scott E

    2016-03-01

    As the field of psychology struggles to trust published findings, replication research has begun to become more of a priority to both scientists and journals. With this increasing emphasis placed on reproducibility, it is essential that replication studies be capable of advancing the field. However, we argue that many researchers have been only narrowly interpreting the meaning of replication, with studies being designed with a simple statistically significant or nonsignificant results framework in mind. Although this interpretation may be desirable in some cases, we develop a variety of additional "replication goals" that researchers could consider when planning studies. Even if researchers are aware of these goals, we show that they are rarely used in practice-as results are typically analyzed in a manner only appropriate to a simple significance test. We discuss each goal conceptually, explain appropriate analysis procedures, and provide 1 or more examples to illustrate these analyses in practice. We hope that these various goals will allow researchers to develop a more nuanced understanding of replication that can be flexible enough to answer the various questions that researchers might seek to understand. PMID:26214497

  16. Behind the scenes of GS: there’s only one way to go

    CERN Multimedia

    Anaïs Schaeffer

    2014-01-01

    At CERN, all of the Laboratory’s imports and exports are routed in the same way: through the Logistics Service. This GS-IS Group service is responsible for receiving, inspecting and distributing all goods sent to the Organization.   Whether products for the CERN Stores, components for the experiments, tools, machinery and materials for the workshops or equipment for users and members of the personnel, nothing escapes the attention of CERN’s Logistics Service, which every year processes nearly 70,000 incoming deliveries, 7,500 shipments and 160,000 distributed items. “The vast majority of our imports come from CERN Member States,” says imports and customs procedures manager Laurence Planque, “but we are receiving more and more goods for collaborators working at CERN from non-Member States such as China, India and Pakistan. All these imports are entitled to diplomatic exemption, so every day we have to manage the customs clearance procedures wit...

  17. A scalable, self-analyzing digital locking system for use on quantum optics experiments

    Science.gov (United States)

    Sparkes, B. M.; Chrzanowski, H. M.; Parrain, D. P.; Buchler, B. C.; Lam, P. K.; Symul, T.

    2011-07-01

    Digital control of optics experiments has many advantages over analog control systems, specifically in terms of the scalability, cost, flexibility, and the integration of system information into one location. We present a digital control system, freely available for download online, specifically designed for quantum optics experiments that allows for automatic and sequential re-locking of optical components. We show how the inbuilt locking analysis tools, including a white-noise network analyzer, can be used to help optimize individual locks, and verify the long term stability of the digital system. Finally, we present an example of the benefits of digital locking for quantum optics by applying the code to a specific experiment used to characterize optical Schrödinger cat states.

  18. A Scalable, Self-Analyzing Digital Locking System for use on Quantum Optics Experiments

    CERN Document Server

    Sparkes, B M; Parrain, D P; Buchler, B C; Lam, P K; Symul, T

    2011-01-01

    Digital control of optics experiments has many advantages over analog control systems, specifically in terms of scalability, cost, flexibility, and the integration of system information into one location. We present a digital control system, freely available for download online, specifically designed for quantum optics experiments that allows for automatic and sequential re-locking of optical components. We show how the inbuilt locking analysis tools, including a white-noise network analyzer, can be used to help optimize individual locks, and verify the long term stability of the digital system. Finally, we present an example of the benefits of digital locking for quantum optics by applying the code to a specific experiment used to characterize optical Schrodinger cat states.

  19. Combining NASA/JPL One-Way Optical-Fiber Light-Speed Data with Spacecraft Earth-Flyby Doppler-Shift Data to Characterise 3-Space Flow

    OpenAIRE

    Cahill R. T.

    2009-01-01

    We combine data from two high precision NASA / JPL experiments: (i) the one-way speed of light experiment using optical fibers: Krisher T.P., Maleki L., Lutes G.F., Pri- mas L.E., Logan R.T., Anderson J.D. and Will C.M. Phys. Rev. D , 1990, v. 42, 731–734, and (ii) the spacecraft earth-flyby Doppler shift data: Anderson J.D., Campbell J.K., Ekelund J.E., Ellis J. and Jordan J.F. Phys. Rev. Lett. , 2008, v. 100, 091102, to give the solar-system galactic 3-spa...

  20. Science Teaching Experiences in Informal Settings: One Way to Enrich the Preparation Program for Preservice Science Teachers

    Science.gov (United States)

    Hsu, Pei-Ling

    2016-01-01

    The high attrition rate of new science teachers demonstrates the urgent need to incorporate effective practices in teacher preparation programs to better equip preservice science teachers. The purpose of the study is to demonstrate a way to enrich preservice science teachers' preparation by incorporating informal science teaching practice into…

  1. FORTRAN IV Program for One-Way Analysis of Variance with A Priori or A Posteriori Mean Comparisons

    Science.gov (United States)

    Fordyce, Michael W.

    1977-01-01

    A flexible Fortran program for computing one way analysis of variance is described. Requiring minimal core space, the program provides a variety of useful group statistics, all summary statistics for the analysis, and all mean comparisons for a priori or a posteriori testing. (Author/JKS)

  2. An integrative conceptual framework for analyzing customer satisfaction with shopping trip experiences in grocery retailing

    DEFF Research Database (Denmark)

    Esbjerg, Lars; Jensen, Birger Boutrup; Bech-Larsen, Tino;

    2012-01-01

    Grocery retailers aim to satisfy customers, and because grocery shopping trips are frequently recurring, they must do socontinuously. Surprisingly, little research has addressed satisfaction with individual grocery shopping trips. This article therefore develops a conceptual framework for analyzing...... customer satisfaction with individual grocery shopping trip experiences within a overall ‘disconfirmation of expectations model’ of customer satisfaction. The contribution of the framework is twofold. First, by focusing on satisfaction with individual grocery shopping trips, previous research...... on satisfaction in the retailing literature. Second, the framework synthesizes and integrates multiple central concepts from different research streams into a common framework for analyzing shopping trip satisfaction. Propositions are derived regarding the relationships among the different concepts...

  3. Towards for Analyzing Alternatives of Interaction Design Based on Verbal Decision Analysis of User Experience

    Directory of Open Access Journals (Sweden)

    Marília Soares Mendes

    2010-04-01

    Full Text Available In domains (as digital TV, smart home, and tangible interfaces that represent a new paradigm of interactivity, the decision of the most appropriate interaction design solution is a challenge. HCI researchers have promoted in their works the validation of design alternative solutions with users before producing the final solution. User experience with technology is a subject that has also gained ground in these works in order to analyze the appropriate solution(s. Following this concept, a study was accomplished under the objective of finding a better interaction solution for an application of mobile TV. Three executable applications of mobile TV prototypes were built. A Verbal Decision Analysis model was applied on the investigations for the favorite characteristics in each prototype based on the user’s experience and their intentions of use. This model led a performance of a qualitative analysis which objectified the design of a new prototype.

  4. One Way into Culture

    Institute of Scientific and Technical Information of China (English)

    刘娜; 崔春燕

    2008-01-01

    Culture, in a wide sense, is the sum total of material and spiritual products created by man in the historical process of a socialpractice. In a narrow sense, it refers to a social ideology and the political system and constitutional organization corresponding to the ideology.Language has a very special position in this big culture and it cannot be well taught and learnt without the introducing of cultural knowledge. One ofthe effective ways to increase awareness of the euhural is to learn the patterns of western everyday life.

  5. Analyzing price and efficiency dynamics of large appliances with the experience curve approach

    International Nuclear Information System (INIS)

    Large appliances are major power consumers in households of industrialized countries. Although their energy efficiency has been increasing substantially in past decades, still additional energy efficiency potentials exist. Energy policy that aims at realizing these potentials faces, however, growing concerns about possible adverse effects on commodity prices. Here, we address these concerns by applying the experience curve approach to analyze long-term price and energy efficiency trends of three wet appliances (washing machines, laundry dryers, and dishwashers) and two cold appliances (refrigerators and freezers). We identify a robust long-term decline in both specific price and specific energy consumption of large appliances. Specific prices of wet appliances decline at learning rates (LR) of 29±8% and thereby much faster than those of cold appliances (LR of 9±4%). Our results demonstrate that technological learning leads to substantial price decline, thus indicating that the introduction of novel and initially expensive energy efficiency technologies does not necessarily imply adverse price effects in the long term. By extending the conventional experience curve approach, we find a steady decline in the specific energy consumption of wet appliances (LR of 20-35%) and cold appliances (LR of 13-17%). Our analysis suggests that energy policy might be able to bend down energy experience curves. (author)

  6. Application of direct computing of one-way coupling technique in seismic analysis of concrete gravity dam

    OpenAIRE

    Quoc CongTRINH; Liao-jun ZHANG

    2010-01-01

    A dam-reservoir system subjected to an earthquake is a nonlinear system, because the fluid equations are always nonlinear regardless of the linear or nonlinear model used for the dam body. Therefore, transient analysis is necessary. In this study, dam-reservoir interaction during earthquake excitation was modeled by utilizing coupled finite element equations based on the Eulerian approach. Direct computing of the one-way coupling technique was used to solve the coupled equations. This techniq...

  7. Optimum design of one way concrete slabs cast against Textile Reinforced Concrete Stay-in-Place Formwork Elements

    OpenAIRE

    Papantoniou, Ioannis; Papanicolaou, Catherine; Triantafillou, Thanasis

    2009-01-01

    This study presents a conceptual design process for one-way reinforced concrete slabs cast over Textile Reinforced Concrete (TRC) Stay-in-Place (SiP) formwork elements, aiming at the minimization of the composite slab cost satisfying Ultimate Limit State (ULS) and Serviceability Limit State (SLS) design criteria. The thin-walled TRC element is considered to participate in the structural behaviour of the composite slab. This distinct function of the TRC element (as formwork and as a part of a ...

  8. A review of the German mandatory deposit for one-way drinks packaging and drinks packaging taxes in Europe

    OpenAIRE

    Groth, Markus

    2008-01-01

    The mandatory deposit for one-way drinks packaging, embodied in the German Packaging Ordinance of 1991, entered into force in January 2003, after the condition for its implementation was given by the fall of the market share of reusable drinks packaging under 72% in 1997. In this context the author doubts that the German mandatory deposit is an effective instrument to stabilise the market share of ecologically advantageous drinks packaging. Rather it is to be expected that the environmental p...

  9. KANDUNGAN ZAT KIMIA ANORGANIK PADA BEBERAPA PROSES FILTRASI AIR MINUM KEMASAN DAN ISI ULANG MENGGUNAKAN ONE-WAY MANOVA

    OpenAIRE

    Heruna Tanty

    2010-01-01

    Analysis of chemical substances in some processes an-organic bottled water and drinking water recharge has been done using One Way Manova. Samples originated from springs Ciburial Bogor taken in May 2009 at 10 depots refill drinking water process (AMDIU) Around Syahdan and Anggrek Campus of Bina Nusantara University. Reserve osmosis filtration processes and filtration Hollow Fiber and testing of heavy metal contents of five CN, Pb, Mn, Cr, and Cd in the company carried out the bottled water (...

  10. Service and Ultimate Limit State Flexural Behavior of One-Way Concrete Slabs Reinforced with Corrosion-Resistant Reinforcing Bars

    OpenAIRE

    Bowen, Galo Emilio

    2013-01-01

    This paper presents results of an experimental investigation to study the structural performance and deformability of a concrete bridge deck reinforced with corrosion resistant reinforcing (CRR) bars, i.e., bars that exhibit improved corrosion resistance when embedded in concrete as compared to traditional black steel. Flexural tests of one-way slabs were conducted to simulate negative transverse flexure over a bridge girder as assumed in the commonly employed strip design method. The bar typ...

  11. Analyzing power in CNI-region at AGS (experiment E950)

    International Nuclear Information System (INIS)

    Acceleration of polarized protons is one of the exciting features of the new Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory. Measurements of beam polarization are required both for experiments and the accelerator tuning. Elastic scattering in the Coulomb nuclear interference (CNI) region of polarized proton beams on a carbon target demonstrates asymmetry which can be used to build a polarimeter. The methods proposed for a RHIC CNI polarimeter were tested with the AGS polarized beam in the E950 experiment. A 21.7 GeV/c polarized proton beam was scattered on an extremely thin carbon ribbon target located in the AGS ring. Two symmetrical arms consisting of silicon strip detectors (SSD) and a micro channel plate (MCP) were used to identify recoil carbon. Data obtained demonstrates a good identification of the reaction by the apparatus and a significant analyzing power. A RHIC polarimeter setup with 4 SSDs but without MCPs will be used to commission RHIC with polarized protons and for the first spin physics running in 2001

  12. Development of One-way Moisture Transferring Knitted Fabric%单向导湿针织面料的开发

    Institute of Scientific and Technical Information of China (English)

    陈百顺; 郭峰; 何泽寿

    2014-01-01

    从理论分析和具体操作方法上,介绍织物单向导湿的实现方式。通过印花工艺对织物进行微型窗整理,以及利用丙纶的芯吸作用,开发了4款具有单向导湿功能的网眼组织针织面料,并介绍面料的编织生产工艺和印花加工工艺。以5次水洗前后的单向导湿传递指数和芯吸高度来评价织物的吸湿性和导湿性能,结果表明,4款面料均具有良好的单向导湿性能,且没有明显的优劣差异,此种功能产品尤其适合制作高性能的户外运动服装。最后针对单向导湿织物的重点研究方向和存在问题提出了一些建议。%Based on the theoretical analysis and operation methods of one-way moisture transferring of fabric, the paper analyzes the implementing process. It develops 4 kinds of new mesh knitted fabrics with one-way mois-ture transferring function obtained by using printing process (micro-window structure) and wicking of polypropylene. Besides, it introduces in detail the knitting technology and the dyeing and finishing technology. The moisture ab-sorption and transferring property of fabrics is evaluated in terms of wicking height and one-way moisture transfer-ring index before washing and after 5 times’ washing respectively. The results show that the new knitted fabrics have good one-way moisture transferring property, and there are no significant differences between them; this kind of functional product is particularly suitable for the high-performance outdoor sports apparel. Furthermore, the exist-ed problems and future research direction are given.

  13. Three-dimensional study of a one-way, flexible magnetorheological elastomer-based micro fluid transport system

    Science.gov (United States)

    Behrooz, Majid; Gordaninejad, Faramarz

    2016-09-01

    This paper presents a three-dimensional study of a controllable flexible magnetically-activated micropump. The tubular micropump employs magnetically induced deformation of magnetorheological elastomer and one-way flexible conical valves for fluid transport. Three-dimensional magneto–fluid–solid interaction analysis is employed to investigate the performance of the system. The effects of key material, geometric, and magnetic parameters on the effectiveness of the system are examined. It is demonstrated that the proposed system can propel the fluid unidirectionally, and the volume of the transported fluid is significantly affected by some of the design parameters.

  14. Zero-Error Attacks and Detection Statistics in the Coherent One-Way Protocol for Quantum Cryptography

    CERN Document Server

    Branciard, C; Lütkenhaus, N; Scarani, V; Branciard, Cyril; Gisin, Nicolas; Lutkenhaus, Norbert; Scarani, Valerio

    2006-01-01

    This is a study of the security of the Coherent One-Way (COW) protocol for quantum cryptography, proposed recently as a simple and fast experimental scheme. In the zero-error regime, the eavesdropper Eve can only take advantage of the losses in the transmission. We consider new attacks, based on unambiguous state discrimination, which perform better than the basic beam-splitting attack, but which can be detected by a careful analysis of the detection statistics. These results stress the importance of testing several statistical parameters in order to achieve higher rates of secret bits.

  15. Three-dimensional study of a one-way, flexible magnetorheological elastomer-based micro fluid transport system

    Science.gov (United States)

    Behrooz, Majid; Gordaninejad, Faramarz

    2016-09-01

    This paper presents a three-dimensional study of a controllable flexible magnetically-activated micropump. The tubular micropump employs magnetically induced deformation of magnetorheological elastomer and one-way flexible conical valves for fluid transport. Three-dimensional magneto-fluid-solid interaction analysis is employed to investigate the performance of the system. The effects of key material, geometric, and magnetic parameters on the effectiveness of the system are examined. It is demonstrated that the proposed system can propel the fluid unidirectionally, and the volume of the transported fluid is significantly affected by some of the design parameters.

  16. Experimenting with spirituality: analyzing The God Gene in a nonmajors laboratory course.

    Science.gov (United States)

    Silveira, Linda A

    2008-01-01

    References linking genes to complex human traits, such as personality type or disease susceptibility, abound in the news media and popular culture. In his book The God Gene: How Faith is Hardwired into Our Genes, Dean Hamer argues that a variation in the VMAT2 gene plays a role in one's openness to spiritual experiences. In a nonmajors class, we read and discussed The God Gene and conducted on a small scale an extension of the study it describes. Students used polymerase chain reaction to replicate a portion of their VMAT2 genes, and they analyzed three polymorphic sites in the sequence of these products. Associations between particular VMAT2 alleles and scores on a personality test were assessed by t test. The course, of which this project was a major part, stimulated student learning; scores on a test covering basic genetic concepts, causation/correlation, and laboratory methodology improved after completion of the course. In a survey, students reported the laboratory project aided their learning, especially in the areas of statistics and the linking of genes to behaviors. They reported high levels of engagement with the project, citing in particular its personal nature as motivating their interest.

  17. Recent advances in acoustic one-way manipulation%声单向操控研究进展∗

    Institute of Scientific and Technical Information of China (English)

    梁彬; 袁樱; 程建春

    2015-01-01

    电子二极管的发明标志着现代电子学的诞生,在整个人类社会中引起了科技的深刻变革。声波是一种具有非常悠久的研究历史的经典波,却始终被认为仅具有对称的传播形式。若能制造出可像电子二极管控制电流般实现声波单向导通的声学器件,显然将对整个声学研究领域产生重大影响,具有重要的科学意义及应用价值。第一个基于非线性媒质与声子晶体的声二极管利用非线性突破声学互易原理的局限,首次实现了将声能流限制在单一方向上的声整流效应。针对非线性系统转换效率低下的固有缺陷,在线性体系内围绕声单向传播这个重要科学问题开展了一系列理论和实验研究,设计与制备了多种具有特殊结构和性能的线性声学单向结构,在器件的效率、带宽及尺寸方面产生了突破。在声二极管研究的基础上,第一个可以像电子三极管操控电流般对声流进行操控与放大的声三极管理论模型也被提出。本文介绍了声单向传播这一新兴且富有蓬勃生机的研究领域中的主要进展。%Realizations of one-way manipulations in various kinds of energy flux are always highly desirable. The most famous example should be the invention of electric diodes which marked the emergence of modern electronics and resulted in worldwide technology revolutions. Acoustic wave, albeit a classical wave with much longer research history in comparison with the electricity, has long been thought to propagate easily along two opposite directions in any path. Hence it should be intriguing to realize the one-way transmission of acoustic waves by designing the acoustical analogy of electric diodes, which would have deep implications in all the acoustics-based applications and the field of acoustics in general. In this review, we briefly describe recent advances in acoustic one-way manipulation which has become a new frontier

  18. Burning Invariant Manifold Theory and the Bipartite Digraph Representation of Generalized Dynamical System Formed by One-way Barriers

    Science.gov (United States)

    Li, John; Mahoney, John; Mitchell, Kevin; Solomon, Tom

    2013-11-01

    The recently developed Burning Invariant Manifold (BIM) theory took a dynamical system approach to understand front propagation in Advection-Reaction-Diffusion systems and successfully predicted both the short-term and asymptotic front behavior by finding the unstable BIMs which act as barriers to front propagation. Unlike separatrices in traditional dynamical system being two-way barriers, the BIMs are one-way barriers. This asymmetry gives rise to a much richer dynamical behavior than traditional dynamical systems. Through numerical simulations, we found that the stable BIMs are the basin boundaries. Based on the properties of BIM theory, we further derived a theory to investigate a dynamical system consists of one-way barriers and the cooperative behavior of these barriers. This theory reveals the global structure of both stable and unstable BIMs by first using a systematic algorithm to convert the flow to a bipartite digraph and then extracting information of the steady states of fronts and corresponding basins of attraction from the digraph. This work was supported by the US National Science Foundation under grant PHY-0748828 and NSF Fellowship DGE-0937362.

  19. KANDUNGAN ZAT KIMIA ANORGANIK PADA BEBERAPA PROSES FILTRASI AIR MINUM KEMASAN DAN ISI ULANG MENGGUNAKAN ONE-WAY MANOVA

    Directory of Open Access Journals (Sweden)

    Heruna Tanty

    2010-05-01

    Full Text Available Analysis of chemical substances in some processes an-organic bottled water and drinking water recharge has been done using One Way Manova. Samples originated from springs Ciburial Bogor taken in May 2009 at 10 depots refill drinking water process (AMDIU Around Syahdan and Anggrek Campus of Bina Nusantara University. Reserve osmosis filtration processes and filtration Hollow Fiber and testing of heavy metal contents of five CN, Pb, Mn, Cr, and Cd in the company carried out the bottled water (bottled water PT Buana Cikarang Tirta Abadi. Test results and analysis show that the processed water filtration contains CN, Pb, Mn, Cr, and Cd was lower than that of water filtration was not processed. And drinking water processed by filtration Reserve Osmosis, contains CN, Pb, Mn, Cr, and Cd was lower than that processed by Hollow Fiber Filtration and Granular Activated Charcoal.

  20. Effect of soil temperature on one-way optical frequency transfer through dense-wavelength-division-multiplexing fibre links

    CERN Document Server

    Pinkert, T J; Jansen, G S M; Dijck, E A; Groeneveld, B G H M; Smets, R; Bosveld, F C; Ubachs, W; Jungmann, K; Eikema, K S E; Koelemeij, J C J

    2014-01-01

    Results of optical frequency transfer over a carrier-grade dense-wavelength-division-multiplexing (DWDM) optical fibre network are presented. The relation between soil temperature changes on a buried optical fibre and frequency changes of an optical carrier through the fibre is modelled. Soil temperatures, measured at various depths by the Royal Netherlands Meteorology Institute (KNMI) are compared with observed frequency variations through this model. A comparison of a nine-day record of optical frequency measurements through the 2 x 298 km fibre link with soil temperature data shows qualitative agreement. A soil temperature model is used to predict the link stability over longer periods (days-months-years). We show that one-way optical frequency dissemination is sufficiently stable to distribute and compare e.g. rubidium frequency standards over standard DWDM optical fibre networks.

  1. Use of endobronchial one-way valves reveals questions on etiology of spontaneous pneumothorax: report of three cases

    Directory of Open Access Journals (Sweden)

    Kwok Hau

    2009-11-01

    Full Text Available Abstract Spontaneous pneumothoraces are believed to arise when air from the supplying airway exit via a ruptured visceral pleural bleb into the pleural cavity. Endobronchial one-way valves (EBVs allow air exit (but not entry from individual segmental airways. Systematic deployment of EBVs was applied to three patients with secondary spontaneous pneumothoraces and persistent airleak. In all cases, balloon-catheter occlusion of the upper lobe bronchus stopped the airleak. EBVs applied to individual upper lobe segmental airways failed to terminate the airleak, which only stopped after placements of multiple EBVs to occlude all upper lobe segments. The observation questions the traditional belief of 'one-airway-one-bleb-one-leak' in spontaneous pneumothorax.

  2. Tight bounds on the randomized communication complexity of symmetric XOR functions in one-way and SMP models

    CERN Document Server

    Leung, Ming Lam; Zhang, Shengyu

    2011-01-01

    We study the communication complexity of symmetric XOR functions, namely functions $f: \\{0,1\\}^n \\times \\{0,1\\}^n \\rightarrow \\{0,1\\}$ that can be formulated as $f(x,y)=D(|x\\oplus y|)$ for some predicate $D: \\{0,1,...,n\\} \\rightarrow \\{0,1\\}$, where $|x\\oplus y|$ is the Hamming weight of the bitwise XOR of $x$ and $y$. We give a public-coin randomized protocol in the Simultaneous Message Passing (SMP) model, with the communication cost matching the known lower bound for the \\emph{quantum} and \\emph{two-way} model up to a logarithm factor. As a corollary, this closes a quadratic gap between quantum lower bound and randomized upper bound for the one-way model, answering an open question raised in Shi and Zhang \\cite{SZ09}.

  3. Analyzing Social Experiments as Implemented: A Reexamination of the Evidence From the HighScope Perry Preschool Program

    OpenAIRE

    Heckman, James Joseph; Moon, Seong Hyeok; Pinto, Rodrigo; Peter A. Savelyev; Yavitz, Adam

    2010-01-01

    Social experiments are powerful sources of information about the effectiveness of interventions. In practice, initial randomization plans are almost always compromised. Multiple hypotheses are frequently tested. "Significant" effects are often reported with p-values that do not account for preliminary screening from a large candidate pool of possible effects. This paper develops tools for analyzing data from experiments as they are actually implemented. We apply these tools to analyze the inf...

  4. In-Laboratory Experiments to Analyze Enroute Driver Behavior Under ATIS

    OpenAIRE

    Adler, Jeffrey L.; Recker, Wilfred W.; McNally, Michael G.

    1993-01-01

    This paper discusses preliminary results from an in-laboratory experiment to study enroute driver behavior under ATIS. The case study was conducted using FASTCARS (Freeway and Arterial Street Traffic Conflict Arousal and Resolution Simulator), an interactive microcomputer-based travel choice simulator. The experiment was designed to both exhibit the value of using computer simulation for data collection and to explore factors that influence and induce changes in enroute driver behavior. A ran...

  5. Application of direct computing of one-way coupling technique in seismic analysis of concrete gravity dam

    Directory of Open Access Journals (Sweden)

    Quoc CongTRINH

    2010-03-01

    Full Text Available A dam-reservoir system subjected to an earthquake is a nonlinear system, because the fluid equations are always nonlinear regardless of the linear or nonlinear model used for the dam body. Therefore, transient analysis is necessary. In this study, dam-reservoir interaction during earthquake excitation was modeled by utilizing coupled finite element equations based on the Eulerian approach. Direct computing of the one-way coupling technique was used to solve the coupled equations. This technique is based on a simple assumption that the fluid hydrodynamic pressure is applied to the dam body while the deformation of the dam has no influence on the water field. Seismic response analysis of the Sonla concrete gravity dam constructed in Sonla Province, Vietnam was carried out as a verification example. The results of the methodology introduced are in close agreement with results of the iterative method and the solution procedure is found to be less time-consuming than that of the iterative method. This method is very convenient and can be easily implemented in finite element programs with fluid-structure interaction modules.

  6. Thermal hydraulic studies of spallation target for one-way coupled Indian accelerator driven systems with low energy proton beam

    Indian Academy of Sciences (India)

    V Mantha; A K Mohanty; P Satyamurthy

    2007-02-01

    BARC has recently proposed a one-way coupled ADS reactor. This reactor requires typically ∼ 1 GeV proton beam with 2 mA of current. Approximately 8 kW of heat is deposited in the window of the target. Circulating liquid metal target (lead/lead-bismuth-eutectic) has to extract this heat and this is a critical R&D problem to be solved. At present there are very few accelerators, which can give few mA and high-energy proton beam. However, accelerators with low energy and hundreds of micro-ampere current are commercially available. In view of this, it is proposed in this paper to simulate beam window heating of ∼ 8 kW in the target with low-energy proton beam. Detailed thermal analysis in the spallation and window region has been carried out to study the capability of heat extraction by circulating LBE for a typical target loop with a proton beam of 30 MeV energy and current of 0.267 mA. The heat deposition study is carried out using FLUKA code and flow analysis by CFD code. The detailed analysis of this work is presented in this paper.

  7. An preliminary clinical study of transbronchoscopic interventional treatment for severe emphysema with local made one-way valvular stents

    International Nuclear Information System (INIS)

    Objective: To evaluate the safety and efficiency of bronchoscopic interventional lung volume reduction with domestic-made stents. Methods: The target areas of 7 patients with severe emphysema for valvular stenting form May 2006 to Aug. 2007 were prospectively selected on the basis of CT scan. Under general anesthesia, one-way valvular stenting were carried out over a guidewire under flexible bronchoscopy and fluoroscopic control. The symptom, pulmonary function, blood gas analysis, B-ultrasonic wave, 6 minute walk distance and thoracic CT were undertaken. Results: 4-6 stents per patient took place in 136 ± 72.3 min to obstruct the upper-lobe segments unilaterally but without obvious atelectasis under imaging. The patients could walk 2 hours after the operation with relief of dyspnea. No major change in radiologic findings and lung function occurred in 2 weeks, only bronchi distal to the stents gathered together. 6-min walk distance, Borg dyspnea scale fell and the pulmonary arterial pressure showed significant (P<0.05)statistical discrepancy. No major life-threatening complications were noted in the 15-day study period and no conspicuous change in lung function, blood gas analysis and lung volume. Lower-lobe pneumonia of nontarget area developed in 1 patient and acute episode of COPD occurred in another. Conclusions: Bronchoscopic interventional lung volume reduction may improve dyspnea and quality of life, as a rather safety therapeutic measure. (authors)

  8. A one-way coupled atmospheric-hydrological modeling system with combination of high-resolution and ensemble precipitation forecasting

    Science.gov (United States)

    Wu, Zhiyong; Wu, Juan; Lu, Guihua

    2016-09-01

    Coupled hydrological and atmospheric modeling is an effective tool for providing advanced flood forecasting. However, the uncertainties in precipitation forecasts are still considerable. To address uncertainties, a one-way coupled atmospheric-hydrological modeling system, with a combination of high-resolution and ensemble precipitation forecasting, has been developed. It consists of three high-resolution single models and four sets of ensemble forecasts from the THORPEX Interactive Grande Global Ensemble database. The former provides higher forecasting accuracy, while the latter provides the range of forecasts. The combined precipitation forecasting was then implemented to drive the Chinese National Flood Forecasting System in the 2007 and 2008 Huai River flood hindcast analysis. The encouraging results demonstrated that the system can clearly give a set of forecasting hydrographs for a flood event and has a promising relative stability in discharge peaks and timing for warning purposes. It not only gives a deterministic prediction, but also generates probability forecasts. Even though the signal was not persistent until four days before the peak discharge was observed in the 2007 flood event, the visualization based on threshold exceedance provided clear and concise essential warning information at an early stage. Forecasters could better prepare for the possibility of a flood at an early stage, and then issue an actual warning if the signal strengthened. This process may provide decision support for civil protection authorities. In future studies, different weather forecasts will be assigned various weight coefficients to represent the covariance of predictors and the extremes of distributions.

  9. Challenging the One-Way Paradigm for More Effective Science Communication: A Critical Review of Two Public Campaigns Addressing Contentious Environmental Issues

    Science.gov (United States)

    McEntee, Marie; Mortimer, Claire

    2013-01-01

    This article examines two large-scale public communication campaigns to explore the appropriateness and effectiveness of using one-way communication in contentious environmental issues. The findings show while one-way communication can be successfully employed in contentious issues, it is not appropriate for all contexts and may contribute to…

  10. Combining NASA/JPL One-Way Optical-Fiber Light-Speed Data with Spacecraft Earth-Flyby Doppler-Shift Data to Characterise 3-Space Flow

    CERN Document Server

    Cahill, Reginald T

    2009-01-01

    We combine data from two high precision NASA/JPL experiments: (i) the one-way speed of light experiment using optical fibers: Krisher T.P., Maleki L., Lutes G.F., Primas L.E., Logan R.T., Anderson J.D. and Will C.M., Phys. Rev. D, vol 42, 731-734, 1990, and (ii) the spacecraft earth-flyby doppler shift data: Anderson J.D., Campbell J.K., Ekelund J.E., Ellis J. and Jordan J.F., Phys. Rev. Lett., vol 100, 091102, 2008, to give the solar-system galactic 3-space average speed of 486km/s in the direction RA=4.29hrs, Dec=-75.0deg. Turbulence effects (gravitational waves) are also evident. Data also reveals the 30km/s orbital speed of the earth and the sun inflow component at 1AU of 42km/s and also 615km/s near the sun, and for the first time, experimental measurement of the 3-space 11.2km/s inflow of the earth. The NASA/JPL data is in remarkable agreement with that determined in other light speed anisotropy experiments, such as Michelson-Morley (1887), Miller (1933), DeWitte (1991), Torr and Kolen (1981), Cahill (2...

  11. Analyzing (through) Resonant Experience - Becoming the one to understand the other

    DEFF Research Database (Denmark)

    Revsbæk, Line

    2016-01-01

    study) other. The paper presents a case of being newcomer (to research communities) researching newcomer innovation (of others) (Revsbaek, 2014). Suggesting that researcher’s resonant experience is an issue of research validity raises the question of researcher qualifications not only being about...

  12. Two-way against one-way nesting for climate downscaling in Europe and the Mediterranean region using LMDZ4

    Science.gov (United States)

    Li, Shan; Li, Laurent; Le Treut, Hervé

    2016-04-01

    In the 21st century, the estimated surface temperature warming projected by General Circulation Models (GCMs) is between 0.3 and 4.8 °C, depending on the scenario considered. GCMs exhibit a good representation of climate on a global scale, but they are not able to reproduce regional climate processes with the same level of accuracy. Society and policymakers need model projections to define climate change adaptation and mitigation policies on a global, regional and local scale. Climate downscaling is mostly conducted with a regional model nested into the outputs of a global model. This one-way nesting approach is generally used in the climate community without feedbacks from Regional Climate Models (RCMs) to GCMs. This lack of interaction between the two models may affect regional modes of variability, in particular those with a boundary conflict. The objective of this study is to evaluate a two-way nesting configuration that makes an interactive coupling between the RCM and the GCM, an approach against the traditional configuration of one-way nesting system. An additional aim of this work is to examine if the two-way nesting system can improve the RCM performance. The atmospheric component of the IPSL integrated climate model (LMDZ) is configured at both regional (LMDZ-regional) and global (LMDZ-global) scales. The two models have the same configuration for the dynamical framework and the physical forcings. The climatology values of sea surface temperature (SST) are prescribed for the two models. The stretched-grid of LMDZ-global is applied to a region defined by Europe, the Mediterranean, North Africa and Western North Atlantic. To ensure a good statistical significance of results, all simulations last at least 80 years. The nesting process of models is performed by a relaxation procedure of a time scale of 90 minutes. In the case of two-way nesting, the exchange between the two models is every two hours. The relaxation procedure induces a boundary conflict

  13. Improvement and Analysis of One-Way Honing to Inner Ball Surface of Spherical Plain Bearing%关节轴承内圈球面单程珩磨分析与改进

    Institute of Scientific and Technical Information of China (English)

    蔡士源

    2014-01-01

    Based on the one-way honing process of inner surface of spherical plain bearing,the principle of one-way honing and finishing process are analyzed,and the principle defects of one-way honing and finishing are illustrated.A method of the spherical round-trip honing and super-finishing technique to replace the one-way honing is put for-ward,and the function of round-trip honing and working principle and characteristics of super-finishing are expoun-ded.%基于关节轴承内圈球面单程珩磨工艺,分析单程珩磨的原理和光整作用过程,说明了单程珩磨光整的原理性缺陷,提出了替代方法即球面双程珩磨和超精加工技术,并阐述了双程珩磨的作用和超精加工的工作原理及特点。

  14. Analyzing the thermionic reactor critical experiments. [thermal spectrum of uranium 235 core

    Science.gov (United States)

    Niederauer, G. F.

    1973-01-01

    The Thermionic Reactor Critical Experiments (TRCE) consisted of fast spectrum highly enriched U-235 cores reflected by different thicknesses of beryllium or beryllium oxide with a transition zone of stainless steel between the core and reflector. The mixed fast-thermal spectrum at the core reflector interface region poses a difficult neutron transport calculation. Calculations of TRCE using ENDF/B fast spectrum data and GATHER library thermal spectrum data agreed within about 1 percent for the multiplication factor and within 6 to 8 percent for the power peaks. Use of GAM library fast spectrum data yielded larger deviations. The results were obtained from DOT R Theta calculations with leakage cross sections, by region and by group, extracted from DOT RZ calculations. Delineation of the power peaks required extraordinarily fine mesh size at the core reflector interface.

  15. Long-term lysimeter experiment to analyze the influence of the climate change on matter fluxes

    Science.gov (United States)

    Pütz, Thomas; Groh, Jannis; Wollschläger, Ute; Gerke, Horst; Priesack, Eckart; Kiese, Ralf; Borg, Erik; Vereecken, Harry

    2015-04-01

    Based on the TERENO SoilCan infrastructure, a long-term large-scale experiment was designed to study the effects of climate change on terrestrial systems. The water and matter fluxes in soil are the main focuses of SoilCan. In the frame of SoilCan, fully automated lysimeter systems were installed on several highly equipped experimental field sites of the TERENO-observatories and the relevant status variables of each ecosystem were monitored (e.g. climate, hydrology, biosphere-atmosphere exchange, biodiversity, etc.). In total, 90 lysimeters (1.5 m depth, 1m2 surface) were filled with soil monoliths at the four TERENO-observatories and were instrumented with TDRs, tensiometers, temperature sensors, soil heat flux plates, and CO2 sensors. For the controlling of the lower boundary condition, suction candle rakes were installed into the lysimeter bottoms. In combination with bi-directional pumps and tanks, the water content of the lysimeters was adjusted to the surrounded original field sites. To simulate the expected climate change, 48 lysimeters were transferred along temperature and rainfall gradients within the respective observatories and between the observatories, based on the principle 'Space for Time'. In case of the "Rur" observatory, three intensively instrumented field sites ("Wüstebach", "Rollesbroich" und "Selhausen") were equipped with lysimeter stations. These three field sites include different land uses, "Wüstebach" as a forest site, "Rollesbroich" as a grassland and "Selhausen" as an arable site. In order to standardize the agronomic management, the crop rotation at the arable lysimeters comprised winter wheat - winter rye - winter barley - oats. For investigation of the matter flux, soil solutions and leachates were regularly sampled. The water balances and the dynamics of the carbon and nitrogen fluxes in the first two years of the experiment will be presented.

  16. Subassembly experiments and a computer code to analyze the dynamic core deformation during local failure propagation

    International Nuclear Information System (INIS)

    Safety investigations for LMFBRs have to consider local failure situations in one fuel element which may escalate to a hypothetical CDA. Such initiating events could produce high pressure pulses in a single subassembly which may expand and rupture the wrapper as well as load adjacent elements impulsively. The associated nonlinear dynamic core deformation problem is treated in this paper. In particular the multirow structural dynamics code COERE-1 and underlying mechanical models are described. Each subassembly is simulated by an equivalent system of point masses and nonlinear coupling springs. The motion of the coolant layer between the elements is treated by an incompressible, non-stationary frictional flow model. In order to obtain realistic code input four types of static single subassembly deformation experiments are described which provided strongly nonlinear load deformation characteristics. Furthermore the transient pressure distribution within the core is obtained from a full scale explosion test. Finally code application is demonstrated and results are given of a transient analysis of the SNR 300 core. (Auth.)

  17. The large-scale biosphere-atmosphere experiment in Amazonia: Analyzing regional land use change effects

    Science.gov (United States)

    Keller, Michael; Silva-Dias, Maria Assunção; Nepstad, Daniel C.; Silva-Andreae, Meinrat O.

    The Large-Scale Biosphere-Atmosphere Experiment in Amazonia (LBA) is a multi-disciplinary, multinational scientific project led by Brazil. LBA researchers seek to understand Amazonia in its global context especially with regard to regional and global climate. Current development activities in Amazonia including deforestation, logging, cattle ranching, and agriculture significantly perturb regional and global carbon budgets and the atmospheric radiation budget through both greenhouse gas inputs and the increase in atmospheric particulates generated by fires. The Brazilian Amazon currently releases about 0.2 Pg-C to the atmosphere each year as a result of net deforestation. Logging and forest fire activity are poorly quantified but certainly increase this amount by more than 10%. Fires associated with land management activities generate smoke that leads to heating of the lower atmosphere, decreases in overall cloudiness, increases in cloud lifetimes, and the suppression of rainfall. There are considerable uncertainties associated with our understanding of smoke effects. Present development trends point to agricultural intensification in the Brazilian Amazon. This intensification and the associated generation of wealth present an opportunity to enhance governance on the frontier and to minimize the damaging effects of fires.

  18. 单向Hash函数SHA-256的研究与改进%One-way Hash function research and improved SHA-256

    Institute of Scientific and Technical Information of China (English)

    何润民

    2013-01-01

    This paper focuses on the study of the Hash SHA-256 algorithm,analyzes the logic and the compression function of the SHA-256 algorithm.On the basis of the study,it designs an improved Hash function SHA-256,using VC ++ development tools,completed the software implementation.It verifies the improved Hash function SHA-256 has better nonlinearity,one-way,collision resistance,randommess and avalanche effect by the theoretical analysis,realization of software for the string of text file Hash and comparison of the calculation results.%对Hash函数SHA-256进行了研究,分析了SHA-256的算法逻辑,以及它所采用的压缩函数的构造,在此基础上研究设计了一个改进的Hash函数SHA-256,应用VC++开发工具对改进的Hash函数SHA-256完成了软件实现.利用理论分析和实现软件对字符串、文本文件进行Hash计算结果的比较,结果证实改进的Hash函数具有更好的非线性性、单向性、抗碰撞性、伪随机性和雪崩效应.

  19. Water diffusion through compacted clays analyzed by neutron scattering and tracer experiments

    International Nuclear Information System (INIS)

    various methodologies to better interpret the dynamic results. Parameters such as particle size, layer spacing, chemical composition, external and total surfaces and porosity were determined. The fundamental transport processes in compacted clay systems were studied over a broad range of temperatures, combining microscopic diffusion experiments (T ∼ 98 to -23 oC) with macroscopic measurements (T ∼ 70 to 0 oC). Moreover, the freezing behaviour of water in compacted clays and its dynamical properties in the supercooled regime were also investigated using microscopic techniques such as neutron scattering, time of flight and backscattering techniques. Such knowledge contributes to develop simplified models for water (and possibly also solute) transport through clays, as they will be used to assess the performance of radioactive waste repositories. From this point of view, it can be beneficial for the safety of radioactive waste repositories and thus the protection of the environment

  20. Water diffusion through compacted clays analyzed by neutron scattering and tracer experiments

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez Sanchez, F

    2007-11-15

    samples using various methodologies to better interpret the dynamic results. Parameters such as particle size, layer spacing, chemical composition, external and total surfaces and porosity were determined. The fundamental transport processes in compacted clay systems were studied over a broad range of temperatures, combining microscopic diffusion experiments (T {approx} 98 to -23 {sup o}C) with macroscopic measurements (T {approx} 70 to 0 {sup o}C). Moreover, the freezing behaviour of water in compacted clays and its dynamical properties in the supercooled regime were also investigated using microscopic techniques such as neutron scattering, time of flight and backscattering techniques. Such knowledge contributes to develop simplified models for water (and possibly also solute) transport through clays, as they will be used to assess the performance of radioactive waste repositories. From this point of view, it can be beneficial for the safety of radioactive waste repositories and thus the protection of the environment.

  1. One way of surface alloying treatment on iron surface based on surface mechanical attrition treatment and heat treatment

    International Nuclear Information System (INIS)

    A method of surface alloying treatment has been developed: Ni powders were welded into the surface of iron plates by Surface Mechanical Attrition Treatment (SMAT), followed by annealing at certain temperature for 30 min. A Ni-Fe alloy layer with thickness about 100 μm in the sample surface was fabricated on pure iron plate. Scanning electron microscope (SEM), glow discharge spectrum (GDS), and X-ray diffraction (XRD) methods were used to analyze the microstructure, the composition and the phases of the alloy layer. Studies on the interface microstructure indicated that there was significant atomic diffusion and formation of multilayer of intermetallic compound and solid solution in SMAT process. Subsequent annealing accelerates the alloying process. The corrosion test shows the sample by SMAT treated with Ni powders exhibit the best corrosion resistance.

  2. Thousand and one ways to quantify and compare protein abundances in label-free bottom-up proteomics.

    Science.gov (United States)

    Blein-Nicolas, Mélisande; Zivy, Michel

    2016-08-01

    How to process and analyze MS data to quantify and statistically compare protein abundances in bottom-up proteomics has been an open debate for nearly fifteen years. Two main approaches are generally used: the first is based on spectral data generated during the process of identification (e.g. peptide counting, spectral counting), while the second makes use of extracted ion currents to quantify chromatographic peaks and infer protein abundances based on peptide quantification. These two approaches actually refer to multiple methods which have been developed during the last decade, but were submitted to deep evaluations only recently. In this paper, we compiled these different methods as exhaustively as possible. We also summarized the way they address the different problems raised by bottom-up protein quantification such as normalization, the presence of shared peptides, unequal peptide measurability and missing data. This article is part of a Special Issue entitled: Plant Proteomics- a bridge between fundamental processes and crop production, edited by Dr. Hans-Peter Mock. PMID:26947242

  3. The Sub-keV Atom Reflecting Analyzer (SARA) Experiment Aboard Chandrayaan-1 Mission: Instrument and Observations

    CERN Document Server

    Bhardwaj, Anil; Dhanya, M B; Barabash, Stas; Yoshifumi, Futaana; Holmstrom, Mats; Sridharan, R; Wurz, Peter; Schaufelberger, Audrey; Kazushi, Asamura

    2010-01-01

    SARA experiment aboard the first Indian lunar mission Chandrayaan-1 had the objective to explore the solar wind-lunar interaction using energetic neutral atoms (ENA) from the lunar surface as diagnostic tool. SARA consisted of an ENA imaging mass analyzer CENA (Chandrayaan-1 Energetic Neutral Analyzer) and an ion mass analyser SWIM (Solar Wind Monitor), along with a digital processing unit (DPU) which commands and controls the sensors and provides the interface to the spacecraft. Both sensors have provided excellent observational data. CENA has observed ENAs from the lunar surface and found that ~20% of the incident solar wind ions get backscattered as ENAs from the lunar surface. This is contrary to the previous assumptions of almost complete absorption of solar wind by the lunar surface. The observation is relevant for other airless bodies in the solar system.

  4. Analyzing business process management

    OpenAIRE

    Skjæveland, Børge

    2013-01-01

    Within the Oil & Gas Industry, the market is constantly growing more competitive, forcing companies to continually adapt to changes. Companies need to cut costs and improve the business efficiency. One way of successfully managing these challenges is to implement business process management in the organization. This thesis will analyze how Oceaneering Asset Integrity AS handled the implementation of a Business Process Management System and the effects it had on the employees. The main goal...

  5. The Pricing Model of Closed-loop Supply Chain with Capacity Constraint under One-way Substitution Strategy%有限产能下单向替代的闭环供应链定价模型研究

    Institute of Scientific and Technical Information of China (English)

    梁云; 雷红; 左小德

    2013-01-01

    本文分析存在产品替代策略的情况下,闲环供应链在有限产能及废旧物品回收数量有限条件下的最优定价策略,分别得出四种不同情形下的最优定价策略与利润情况.同时,分析产能限制及废旧物品回收数量限制两个条件对最优定价决策与利润水平的影响,并通过数值试验进行验证.%This paper adopts product substitution strategy to analyze the optimal pricing strategies of closed-loop supply chains with capacity and used product collecting volume constraints. The optimal pricing schemes and profit levels are also calculated under four circumstances. Moreover, this paper discusses the influence of the above two constraints on optimal pricing strategies. Finally, numerical experiments are adopted to test the theoretical analysis. There are two kinds of products in a remanufacturing closed-loop supply chain: new product and remanufactured product. Although both products have similar functions, customers have higher quality perception for new products than re-manufactured products because of production cost and durability factors. Sometimes, a manufacturer needs to provide customers with new products for the price of remanufactured products because the latter products are out of stock. In general, customers are receptive to the substitution effect. Capacity constraint of the manufactureralso plays an important role in the pricing strategy for a supply chain because new products and remanufactured products consume same labor, machine hours and other resources. When a manufacturer's capacity cannot satisfy all demands of both products, the capacity allocation decision becomes important because it can affect profit of supply chain members. With the assumptions of one way substitution and capacity strategy, mathematical models are set up to explore pricing strategies in the closed-loop supply chain. This study also considers the relationship between new product ' s sales amount and

  6. Transmission function calibration of an angular resolved analyzer for X-ray photoemission spectroscopy: Theory vs experiment

    International Nuclear Information System (INIS)

    Highlights: • A calibration method for the transmission function of modern XPS analyser is shown. • This method can be applied to any soft X-ray photoemission setup. • Ray tracing calculations well agree with experimental results. • A fine calibration is carried out through variable photon energy XPS. • An escape depth correction must be included in the calibration process. - Abstract: In order to achieve the most accurate quantification results in an X-ray photoelectron spectroscopy (XPS) experiment, a fine calibration of the analyzer response is required. In this work an experimental characterization of a modern angle-resolved analyzer, carried out with a unfocused and a highly collimated synchrotron source, is shown. The transmission function is extrapolated from the discrepancy between experimental and theoretically predicted XPS peak areas; the influence of different sensitivity factors and of the escape depth correction on the expected values is also discussed. The analyzer response and the theoretical approach are then tested against energy dispersive XPS measurements (EDXPS). These results are finally compared with TF calculated on the basis of an high accuracy electron ray tracing code, also described in this work

  7. Lesson-analyzing practice of function experiment%机能实验学说课实践

    Institute of Scientific and Technical Information of China (English)

    刘燕; 杨秀红

    2013-01-01

      说课是一种新兴的教学研究改革的手段。机能实验学是一门教学改革后新编排的课程,从课程设置、教学目标、教学流程、课程考核四个方面对机能实验学说课要点进行说明,探讨教师如何完善实验教学备课,使学生快速有效地掌握基本技能和提高综合分析能力。%Lesson-analyzing is a kind of new teaching reform means. Functional experiment is a new arrangement of courses after teaching reform. The present paper deals with the course setting, teaching goal, teaching process, curriculum evaluation of the functional experiment to explore how to perfect experiment teaching, and make students master basic skills quickly and effectively and improve the comprehensive analysis ability.

  8. One way to Lorentz's Transformations

    CERN Document Server

    Bessonov, E G

    2012-01-01

    The derivation of Lorentz Transformations (LT) based on the Principle of Relativity and dependence of the rate of clocks tick (time dilation) on their velocity is presented. The analysis of different ways of the LT derivation allows to look at LT and their consequences from different standpoints, to make them more accessible to a wide circle of readers interested in the relativistic physics.

  9. Fatal dynamic hyperinflation secondary to a blood clot acting as a one-way valve at the internal orifice of a tracheostomy tube

    OpenAIRE

    Raschke RA

    2012-01-01

    We report the case of a patient who suffered fatal cardiopulmonary effects of a mobile blood clot adherent to the internal orifice of her tracheostomy tube. We believe the clot acted as a one-way valve, leading to dynamic hyperinflation and elevated intrinsic positive end expiratory pressure (iPEEP). This complication of a tracheostomy tube was suggested by clinical findings of expiratory wheezing, hypotension, increasing peak inspiratory pressure, and unusual but distinctive radiographic fin...

  10. Quantum computing with photons: introduction to the circuit model, the one-way quantum computer, and the fundamental principles of photonic experiments

    Science.gov (United States)

    Barz, Stefanie

    2015-04-01

    Quantum physics has revolutionized our understanding of information processing and enables computational speed-ups that are unattainable using classical computers. This tutorial reviews the fundamental tools of photonic quantum information processing. The basics of theoretical quantum computing are presented and the quantum circuit model as well as measurement-based models of quantum computing are introduced. Furthermore, it is shown how these concepts can be implemented experimentally using photonic qubits, where information is encoded in the photons’ polarization.

  11. Compact and multi-view solid state neutral particle analyzer arrays on National Spherical Torus Experiment-Upgrade

    Science.gov (United States)

    Liu, D.; Heidbrink, W. W.; Tritz, K.; Fredrickson, E. D.; Hao, G. Z.; Zhu, Y. B.

    2016-11-01

    A compact and multi-view solid state neutral particle analyzer (SSNPA) diagnostic based on silicon photodiode arrays has been successfully tested on the National Spherical Torus Experiment-Upgrade. The SSNPA diagnostic provides spatially, temporally, and pitch-angle resolved measurements of fast-ion distribution by detecting fast neutral flux resulting from the charge exchange (CX) reactions. The system consists of three 16-channel subsystems: t-SSNPA viewing the plasma mid-radius and neutral beam (NB) line #2 tangentially, r-SSNPA viewing the plasma core and NB line #1 radially, and p-SSNPA with no intersection with any NB lines. Due to the setup geometry, the active CX signals of t-SSNPA and r-SSNPA are mainly sensitive to passing and trapped particles, respectively. In addition, both t-SSNPA and r-SSNPA utilize three vertically stacked arrays with different filter thicknesses to obtain coarse energy information. The experimental data show that all channels are operational. The signal to noise ratio is typically larger than 10, and the main noise is x-ray induced signal. The active and passive CX signals are clearly observed on t-SSNPA and r-SSNPA during NB modulation. The SSNPA data also indicate significant losses of passing particles during sawteeth, while trapped particles are weakly affected. Fluctuations up to 120 kHz have been observed on SSNPA, and they are strongly correlated with magnetohydrodynamics instabilities.

  12. Sticky or Slippery Wetting: Network Formation Conditions Can Provide a One-Way Street for Water Flow on Platinum-cured Silicone.

    Science.gov (United States)

    Wang, Chenyu; Nair, Sithara S; Veeravalli, Sharon; Moseh, Patricia; Wynne, Kenneth J

    2016-06-01

    -temperature end (slippery surface) but became pinned at the low-temperature end (sticky surface) and did not move when the slide was rotated 180°. The surface was therefore a "one-way street" for water droplet flow. Theory provides fundamental understanding for slippery/sticky behavior for gradient S-PDMS and Pt-PDMS coatings. A model for network formation is based on hydrosilylation at high temperature and condensation curing of Si-OH from autoxidation of Si-H at low temperatures. In summary, network formation conditions strongly affect receding contact angles and water adhesion for Sylgard 184 and the filler-free mimic Pt-PDMS. These findings suggest careful control of curing conditions is important to silicones used in microfluidic devices or as biomedical materials. Network-forming conditions also impact bulk mechanical properties for Sylgard 184, but the range that can be obtained has not been critically examined for specific applications. PMID:27175918

  13. Sticky or Slippery Wetting: Network Formation Conditions Can Provide a One-Way Street for Water Flow on Platinum-cured Silicone.

    Science.gov (United States)

    Wang, Chenyu; Nair, Sithara S; Veeravalli, Sharon; Moseh, Patricia; Wynne, Kenneth J

    2016-06-01

    -temperature end (slippery surface) but became pinned at the low-temperature end (sticky surface) and did not move when the slide was rotated 180°. The surface was therefore a "one-way street" for water droplet flow. Theory provides fundamental understanding for slippery/sticky behavior for gradient S-PDMS and Pt-PDMS coatings. A model for network formation is based on hydrosilylation at high temperature and condensation curing of Si-OH from autoxidation of Si-H at low temperatures. In summary, network formation conditions strongly affect receding contact angles and water adhesion for Sylgard 184 and the filler-free mimic Pt-PDMS. These findings suggest careful control of curing conditions is important to silicones used in microfluidic devices or as biomedical materials. Network-forming conditions also impact bulk mechanical properties for Sylgard 184, but the range that can be obtained has not been critically examined for specific applications.

  14. One-way Transmission Tunnel Based on Bell-LaPadula Model%一种基于Bell-LaPadula模型的单向传输通道

    Institute of Scientific and Technical Information of China (English)

    刘波; 陈曙辉

    2012-01-01

    在物理隔离情况下,为确保内部网络的安全,数据只能从低密级网络向高密级网络传输.由于没有信息反馈,单向网络协议使传统数据库同步技术无法生效,且数据在传输过程中极容易发生信息丢失和信息错误.针对这些难点问题,引入BLP安全模型进行分析,在数据库同步和高可靠传输方面提出了安全可靠的解决方案,并对依据该方案设计出来的单向传输通道进行了可用性分析.%In the situation of physical isolation, data can only be transmitted from the low security level network to the high one to ensure the safety of the internal network. Without message feedback,one-way network protocol makes the traditional database synchronization technology unusable,and it is very easy that information loss or information error in the transmission process occur frequently. To solve these problems, this paper analyses the BLP model,and presents a safe and reliable solution in the one-way synchronization of database and high reliable transmission. The a-vailability analysis for the one-way transmission tunnel based on our solution is also provided.

  15. A Biomechanical Study of Hyoid Bone and Laryngeal Movements During Swallowing Comparing the Blom Low Profile Voice Inner Cannula and Passy-Muir One Way Tracheotomy Tube Speaking Valves.

    Science.gov (United States)

    Srinet, Prateek; Van Daele, Douglas J; Adam, Stewart I; Burrell, Morton I; Aronberg, Ryan; Leder, Steven B

    2015-12-01

    The aim of this prospective, consecutive, cohort study was to investigate the biomechanical effects, if any, of the Blom low profile voice inner cannula and Passy-Muir one-way tracheotomy tube speaking valves on movement of the hyoid bone and larynx during swallowing. Ten adult patients (8 male, 2 female) with an age range of 61-89 years (mean 71 years) participated. Criteria for inclusion were ≥18 years of age, English speaking, and ability to tolerate both changing to a Blom tracheotomy tube and placement of a one-way tracheotomy tube speaking valve with a fully deflated tracheotomy tube cuff. Digitized videofluoroscopic swallow studies were performed at 30 frames/s and with each patient seated upright in the lateral plane. A total of 18 swallows (three each with 5 cc bolus volumes of single contrast barium and puree + barium × 3 conditions) were analyzed for each participant. Variables evaluated included larynx-to-hyoid bone excursion (mm), maximum hyoid bone displacement (mm), and aspiration status under three randomized conditions: 1. Tracheotomy tube open with no inner cannula; 2. Tracheotomy tube with Blom valve; and 3. Tracheotomy tube with Passy-Muir valve. Blinded reliability testing with a Pearson product moment correlation was performed on 20 % of the data. Intra- and inter-rater reliability for combined measurements of larynx-to-hyoid bone excursion and maximum hyoid bone displacement was r = 0.98. Intra- and inter-rater reliability for aspiration status was 100 %. No significant differences (p > 0.05) were found for larynx-to-hyoid bone excursion and maximum hyoid bone displacement during swallowing based upon an open tracheotomy tube, Blom valve, or Passy-Muir valve. Aspiration status was identical for all three randomized conditions. The presence of a one-way tracheotomy tube speaking valve did not significantly alter two important components of normal pharyngeal swallow biomechanics, i.e., hyoid bone and laryngeal movements

  16. Generation of high-fidelity four-photon cluster state and quantum-domain demonstration of one-way quantum computing.

    Science.gov (United States)

    Tokunaga, Yuuki; Kuwashiro, Shin; Yamamoto, Takashi; Koashi, Masato; Imoto, Nobuyuki

    2008-05-30

    We experimentally demonstrate a simple scheme for generating a four-photon entangled cluster state with fidelity over 0.860+/-0.015. We show that the fidelity is high enough to guarantee that the produced state is distinguished from Greenberger-Horne-Zeilinger, W, and Dicke types of genuine four-qubit entanglement. We also demonstrate basic operations of one-way quantum computing using the produced state and show that the output state fidelities surpass classical bounds, which indicates that the entanglement in the produced state essentially contributes to the quantum operation.

  17. One-way quantum computing with arbitrarily large time-frequency continuous-variable cluster states from a single optical parametric oscillator

    Science.gov (United States)

    Alexander, Rafael N.; Wang, Pei; Sridhar, Niranjan; Chen, Moran; Pfister, Olivier; Menicucci, Nicolas C.

    2016-09-01

    One-way quantum computing is experimentally appealing because it requires only local measurements on an entangled resource called a cluster state. Record-size, but nonuniversal, continuous-variable cluster states were recently demonstrated separately in the time and frequency domains. We propose to combine these approaches into a scalable architecture in which a single optical parametric oscillator and simple interferometer entangle up to (3 ×103 frequencies) × (unlimited number of temporal modes) into a computationally universal continuous-variable cluster state. We introduce a generalized measurement protocol to enable improved computational performance on this entanglement resource.

  18. Exhaustive expansion: A novel technique for analyzing complex data generated by higher-order polychromatic flow cytometry experiments

    Directory of Open Access Journals (Sweden)

    Munsil Wes

    2010-10-01

    Full Text Available Abstract Background The complex data sets generated by higher-order polychromatic flow cytometry experiments are a challenge to analyze. Here we describe Exhaustive Expansion, a data analysis approach for deriving hundreds to thousands of cell phenotypes from raw data, and for interrogating these phenotypes to identify populations of biological interest given the experimental context. Methods We apply this approach to two studies, illustrating its broad applicability. The first examines the longitudinal changes in circulating human memory T cell populations within individual patients in response to a melanoma peptide (gp100209-2M cancer vaccine, using 5 monoclonal antibodies (mAbs to delineate subpopulations of viable, gp100-specific, CD8+ T cells. The second study measures the mobilization of stem cells in porcine bone marrow that may be associated with wound healing, and uses 5 different staining panels consisting of 8 mAbs each. Results In the first study, our analysis suggests that the cell surface markers CD45RA, CD27 and CD28, commonly used in historical lower order (2-4 color flow cytometry analysis to distinguish memory from naïve and effector T cells, may not be obligate parameters in defining central memory T cells (TCM. In the second study, we identify novel phenotypes such as CD29+CD31+CD56+CXCR4+CD90+Sca1-CD44+, which may characterize progenitor cells that are significantly increased in wounded animals as compared to controls. Conclusions Taken together, these results demonstrate that Exhaustive Expansion supports thorough interrogation of complex higher-order flow cytometry data sets and aids in the identification of potentially clinically relevant findings.

  19. Age and Gender Differences Associated with Family Communication and Materialism among Young Urban Adult Consumers in Malaysia: A One-Way Analysis of Variance (ANOVA

    Directory of Open Access Journals (Sweden)

    Eric V. Bindah

    2012-11-01

    Full Text Available The main purpose of this study is to examine the differences in age and gender among the various types of family communication patterns that takes place at home among young adult consumers. It is also an attempt to examine if there are differences in age and gender on the development of materialistic values in Malaysia. This paper briefly conceptualizes the family communication processes based on existing literature to illustrate the association between family communication patterns and materialism. This study takes place in Malaysia, a country in the Southeast Asia embracing a multi-ethnic and multi-cultural society. Preliminary statistical procedures were employed to examine possible significant group differences in family communication and materialism based on various age group and gender among Malaysian consumers. A one-way analysis of variance was utilised to determine the significant differences in terms of age and gender with respect to their responses on the various measures. When there were significant differences, Post Hoc Tests (Scheffe were used to determine the particular groups which differed significantly within a significant overall one-way analysis of variance. The implications, significance and limitations of the study are discussed as a concluding remark.

  20. One-way moisture transport finish of cotton knitgoods%纯棉针织物的单向导湿整理

    Institute of Scientific and Technical Information of China (English)

    高丽贤; 蒋卫强; 曾志丰

    2011-01-01

    纯棉针织物采取先反面防水整理再正面亲水整理,可获得单向导湿性能.整理后,织物正面的滴水扩散时间和滴湿快干时间较反面短,透湿量较反面大,从而可使汗液从内表面迅速转移到织物外表面,使内表面快干达到单向导湿的效果.此外,整理织物的透气性能和摩擦牢度都较好.%Cotton knits can obtain one-way moisture transport property by firstly water repellent finish on back side and then hydrophilic finish on face side. The face side of the finished fabric has less diffusion time of droplet and drying time and higher moisture transmission than back side, which can make the sweat quickly transfer from the inner surface to the outer surface and achieve quick drying property and one-way moisture transport effect. The finished fabric features good permeability and rubbing fastness.

  1. Improved One-Way Hash Chain and Revocation Polynomial-Based Self-Healing Group Key Distribution Schemes in Resource-Constrained Wireless Networks

    Directory of Open Access Journals (Sweden)

    Huifang Chen

    2014-12-01

    Full Text Available Self-healing group key distribution (SGKD aims to deal with the key distribution problem over an unreliable wireless network. In this paper, we investigate the SGKD issue in resource-constrained wireless networks. We propose two improved SGKD schemes using the one-way hash chain (OHC and the revocation polynomial (RP, the OHC&RP-SGKD schemes. In the proposed OHC&RP-SGKD schemes, by introducing the unique session identifier and binding the joining time with the capability of recovering previous session keys, the problem of the collusion attack between revoked users and new joined users in existing hash chain-based SGKD schemes is resolved. Moreover, novel methods for utilizing the one-way hash chain and constructing the personal secret, the revocation polynomial and the key updating broadcast packet are presented. Hence, the proposed OHC&RP-SGKD schemes eliminate the limitation of the maximum allowed number of revoked users on the maximum allowed number of sessions, increase the maximum allowed number of revoked/colluding users, and reduce the redundancy in the key updating broadcast packet. Performance analysis and simulation results show that the proposed OHC&RP-SGKD schemes are practical for resource-constrained wireless networks in bad environments, where a strong collusion attack resistance is required and many users could be revoked.

  2. Haemodynamics of giant cerebral aneurysm: A comparison between the rigid-wall, one-way and two-way FSI models

    Science.gov (United States)

    Khe, A. K.; Cherevko, A. A.; Chupakhin, A. P.; Bobkova, M. S.; Krivoshapkin, A. L.; Orlov, K. Yu

    2016-06-01

    In this paper a computer simulation of a blood flow in cerebral vessels with a giant saccular aneurysm at the bifurcation of the basilar artery is performed. The modelling is based on patient-specific clinical data (both flow domain geometry and boundary conditions for the inlets and outlets). The hydrodynamic and mechanical parameters are calculated in the frameworks of three models: rigid-wall assumption, one-way FSI approach, and full (two-way) hydroelastic model. A comparison of the numerical solutions shows that mutual fluid- solid interaction can result in qualitative changes in the structure of the fluid flow. Other characteristics of the flow (pressure, stress, strain and displacement) qualitatively agree with each other in different approaches. However, the quantitative comparison shows that accounting for the flow-vessel interaction, in general, decreases the absolute values of these parameters. Solving of the hydroelasticity problem gives a more detailed solution at a cost of highly increased computational time.

  3. Adaptation of methodology to select structural alternatives of one-way slab in residential building to the guidelines of the European Committee for Standardization (CEN/TC 350)

    International Nuclear Information System (INIS)

    The European Committee for Standardization (CEN) through its Technical Committee CEN/TC-350 is developing a series of standards for assessing the building sustainability, at both product and building levels. The practical application of the selection (decision making) of structural alternatives made by one-way slabs leads to an intermediate level between the product and the building. Thus the present study addresses this problem of decision making, following the CEN guidelines and incorporating relevant aspects of architectural design into residential construction. A life cycle assessment (LCA) is developed in order to obtain valid information for the decision making process (the LCA was developed applying CML methodology although Ecoindicator99 was used in order to facilitate the comparison of the values); this information (the carbon footprint values) is contrasted with other databases and with the information from the Environmental Product Declaration (EPD) of one of the lightening materials (expanded polystyrene), in order to validate the results. Solutions of different column disposition and geometries are evaluated in the three pillars of sustainable construction on residential construction: social, economic and environmental. The quantitative analysis of the variables used in this study enables and facilitates an objective comparison in the design stage by a responsible technician; the application of the proposed methodology reduces the possible solutions to be evaluated by the expert to 12.22% of the options in the case of low values of the column index and to 26.67% for the highest values. - Highlights: • Methodology for selection of structural alternatives in buildings with one-way slabs • Adapted to CEN guidelines (CEN/TC-350) for assessing the building sustainability • LCA is developed in order to obtain valid information for the decision making process. • Results validated comparing carbon footprint, databases and Env. Product Declarations

  4. Adaptation of methodology to select structural alternatives of one-way slab in residential building to the guidelines of the European Committee for Standardization (CEN/TC 350)

    Energy Technology Data Exchange (ETDEWEB)

    Fraile-Garcia, Esteban, E-mail: esteban.fraile@unirioja.es [University of La Rioja, Department of Mechanical Engineering (Spain); Ferreiro-Cabello, Javier, E-mail: javier.ferreiro@unirioja.es [University of La Rioja, Department of Mechanical Engineering (Spain); Qualiberica S.L. (Spain); Martinez-Camara, Eduardo, E-mail: eduardo.martinezc@unirioja.es [University of La Rioja, Department of Mechanical Engineering (Spain); Jimenez-Macias, Emilio, E-mail: emilio.jimenez@unirioja.es [University of La Rioja, Department of Electrical Engineering (Spain)

    2015-11-15

    The European Committee for Standardization (CEN) through its Technical Committee CEN/TC-350 is developing a series of standards for assessing the building sustainability, at both product and building levels. The practical application of the selection (decision making) of structural alternatives made by one-way slabs leads to an intermediate level between the product and the building. Thus the present study addresses this problem of decision making, following the CEN guidelines and incorporating relevant aspects of architectural design into residential construction. A life cycle assessment (LCA) is developed in order to obtain valid information for the decision making process (the LCA was developed applying CML methodology although Ecoindicator99 was used in order to facilitate the comparison of the values); this information (the carbon footprint values) is contrasted with other databases and with the information from the Environmental Product Declaration (EPD) of one of the lightening materials (expanded polystyrene), in order to validate the results. Solutions of different column disposition and geometries are evaluated in the three pillars of sustainable construction on residential construction: social, economic and environmental. The quantitative analysis of the variables used in this study enables and facilitates an objective comparison in the design stage by a responsible technician; the application of the proposed methodology reduces the possible solutions to be evaluated by the expert to 12.22% of the options in the case of low values of the column index and to 26.67% for the highest values. - Highlights: • Methodology for selection of structural alternatives in buildings with one-way slabs • Adapted to CEN guidelines (CEN/TC-350) for assessing the building sustainability • LCA is developed in order to obtain valid information for the decision making process. • Results validated comparing carbon footprint, databases and Env. Product Declarations

  5. Application of a Modified Gas Chromatograph to Analyze Space Experiment Combustion Gases on Space Shuttle Mission STS-94

    Science.gov (United States)

    Coho, William K.; Weiland, Karen J.; VanZandt, David M.

    1998-01-01

    A space experiment designed to study the behavior of combustion without the gravitational effects of buoyancy was launched aboard the Space Shuttle Columbia on July 1, 1997. The space experiment, designated as Combustion Module-1 (CM-1), was one of several manifested on the Microgravity Sciences Laboratory - 1 (MSL-1) mission. The launch, designated STS-94, had the Spacelab Module as the payload, in which the MSL-1 experiments were conducted by the Shuttle crewmembers. CM-1 was designed to accommodate two different combustion experiments during MSL-1. One experiment, the Structure of Flame Balls at Low Lewis-number experiment (SOFBALL), required gas chromatography analysis to verify the composition of the known, premixed gases prior to combustion, and to determine the remaining reactant and the products resulting from the combustion process in microgravity. A commercial, off-the-shelf, dual-channel micro gas chromatograph was procured and modified to interface with the CM-1 Fluids Supply Package and the CM-1 Combustion Chamber, to accommodate two different carrier gases, each flowing through its own independent column module, to withstand the launch environment of the Space Shuttle, to accept Spacelab electrical power, and to meet the Spacelab flight requirements for electromagnetic interference (EMI) and offgassing. The GC data was down linked to the Marshall Space Flight Center for near-real time analysis, and stored on-orbit for post-flight analysis. The gas chromatograph operated successfully during the entire SOFBALL experiment and collected 309 runs. Because of the constraints imposed upon the gas chromatograph by the CM-1 hardware, system and operations, it was unable to measure the gases to the required accuracy. Future improvements to the system for a re-flight of the SOFBALL experiment are expected to enable the gas chromatograph to meet all the requirements.

  6. Analyzing Inquiry Questions of High-School Students in a Gas Chromatography Open-Ended Laboratory Experiment

    Science.gov (United States)

    Blonder, Ron; Mamlock-Naaman, Rachel; Hofstein, Avi

    2008-01-01

    This paper describes the implementation of an open-ended inquiry experiment for high-school students, based on gas chromatography (GC). The research focuses on identifying the level of questions that students ask during the GC open inquiry laboratory, and it examines whether implementing the advanced inquiry laboratory opens up new directions for…

  7. Combining Likert scale attitudinal statements with choice experiments to analyze pref-erence heterogeneity for functional dairy products

    OpenAIRE

    Bechtold, Kai-Brit; Abdulai, Awudu

    2013-01-01

    This study employs a discrete choice experiment to examine preferences for functional dairy product attributes and willingness-to-pay estimates with a focus on heterogeneity among con-sumers in Germany. The intent of this paper is to estimate preference heterogeneity by linking stated preference choice data not only to socioeconomic characteristics but also to attitudinal statements in a latent class framework. The empirical results indicate the existence of class-specific preference heteroge...

  8. Les aboutissements de la circulation à sens unique dans le discours médical [The Outcomes of one-way circulation in medical discourse

    Directory of Open Access Journals (Sweden)

    Mª Dolores Vivero García

    2010-12-01

    Full Text Available Ce travail concerne le discours médical sur la dépression. L'analyse de la mise en scène de la circulation des connaissancesdans notre corpus montre que ce discours se fonde sur une doxa scientifique construite comme le lieu d'une circulation. Il prend également appui sur une représentation de la maladie supposéepartagée par les destinataires (les médecins généralistes, si bien que l'énonciation se rattache implicitement à un discours doxique relatif à un certain modèle de la dépression.We analyse medical discourse about depressive disorder. Analyse of representation of knowledge circulation shows that this discourse is based on Doxa as a one-way circulation. It is based in the social representation of depressive disorder supposedly shared by interlocutors, that is to say the general practitioners. The enunciation appears as implicitly connected to discourse of one model of depressive disorder.

  9. Is there more than one way to skin a newt? Convergent toxin resistance in snakes is not due to a common genetic mechanism.

    Science.gov (United States)

    Feldman, C R; Durso, A M; Hanifin, C T; Pfrender, M E; Ducey, P K; Stokes, A N; Barnett, K E; Brodie, E D; Brodie, E D

    2016-01-01

    Convergent evolution of tetrodotoxin (TTX) resistance, at both the phenotypic and genetic levels, characterizes coevolutionary arms races between amphibians and their snake predators around the world, and reveals remarkable predictability in the process of adaptation. Here we examine the repeatability of the evolution of TTX resistance in an undescribed predator-prey relationship between TTX-bearing Eastern Newts (Notophthalmus viridescens) and Eastern Hog-nosed Snakes (Heterodon platirhinos). We found that that local newts contain levels of TTX dangerous enough to dissuade most predators, and that Eastern Hog-nosed Snakes within newt range are highly resistant to TTX. In fact, these populations of Eastern Hog-nosed Snakes are so resistant to TTX that the potential for current reciprocal selection might be limited. Unlike all other cases of TTX resistance in vertebrates, H. platirhinos lacks the adaptive amino acid substitutions in the skeletal muscle sodium channel that reduce TTX binding, suggesting that physiological resistance in Eastern Hog-nosed Snakes is conferred by an alternate genetic mechanism. Thus, phenotypic convergence in this case is not due to parallel molecular evolution, indicating that there may be more than one way for this adaptation to arise, even among closely related species.

  10. One-Way Multishape-Memory Effect and Tunable Two-Way Shape Memory Effect of Ionomer Poly(ethylene-co-methacrylic acid).

    Science.gov (United States)

    Lu, Lu; Li, Guoqiang

    2016-06-15

    Reversible elongation by cooling and contraction by heating, without the need for repeated programming, is well-known as the two-way shape-memory effect (2W-SME). This behavior is contrary to the common physics-contraction when cooling and expansion when heating. Materials with such behavior may find many applications in real life, such as self-sufficient grippers, fastening devices, optical gratings, soft actuators, and sealant. Here, it is shown that ionomer Surlyn 8940, a 50-year old polymer, exhibits both one-way multishape-memory effects and tunable two-way reversible actuation. The required external tensile stress to trigger the tunable 2W-SME is very low when randomly jumping the temperatures within the melting transition window. With a proper one-time programming, "true" 2W-SME (i.e., 2W-SME without the need for an external tensile load) is also achieved. A long training process is not needed to trigger the tunable 2W-SME. Instead, a proper one-time tensile programming is sufficient to trigger repeated and tunable 2W-SME. Because the 2W-SME of the ionomer Surlyn is driven by the thermally reversible network, here crystallization and melting transitions of the semicrystalline poly(ethylene-co-methacrylic acid), it is believed that a class of thermally reversible polymers should also exhibit tunable 2W-SMEs.

  11. One-Way Multishape-Memory Effect and Tunable Two-Way Shape Memory Effect of Ionomer Poly(ethylene-co-methacrylic acid).

    Science.gov (United States)

    Lu, Lu; Li, Guoqiang

    2016-06-15

    Reversible elongation by cooling and contraction by heating, without the need for repeated programming, is well-known as the two-way shape-memory effect (2W-SME). This behavior is contrary to the common physics-contraction when cooling and expansion when heating. Materials with such behavior may find many applications in real life, such as self-sufficient grippers, fastening devices, optical gratings, soft actuators, and sealant. Here, it is shown that ionomer Surlyn 8940, a 50-year old polymer, exhibits both one-way multishape-memory effects and tunable two-way reversible actuation. The required external tensile stress to trigger the tunable 2W-SME is very low when randomly jumping the temperatures within the melting transition window. With a proper one-time programming, "true" 2W-SME (i.e., 2W-SME without the need for an external tensile load) is also achieved. A long training process is not needed to trigger the tunable 2W-SME. Instead, a proper one-time tensile programming is sufficient to trigger repeated and tunable 2W-SME. Because the 2W-SME of the ionomer Surlyn is driven by the thermally reversible network, here crystallization and melting transitions of the semicrystalline poly(ethylene-co-methacrylic acid), it is believed that a class of thermally reversible polymers should also exhibit tunable 2W-SMEs. PMID:27191832

  12. Is there more than one way to skin a newt? Convergent toxin resistance in snakes is not due to a common genetic mechanism.

    Science.gov (United States)

    Feldman, C R; Durso, A M; Hanifin, C T; Pfrender, M E; Ducey, P K; Stokes, A N; Barnett, K E; Brodie, E D; Brodie, E D

    2016-01-01

    Convergent evolution of tetrodotoxin (TTX) resistance, at both the phenotypic and genetic levels, characterizes coevolutionary arms races between amphibians and their snake predators around the world, and reveals remarkable predictability in the process of adaptation. Here we examine the repeatability of the evolution of TTX resistance in an undescribed predator-prey relationship between TTX-bearing Eastern Newts (Notophthalmus viridescens) and Eastern Hog-nosed Snakes (Heterodon platirhinos). We found that that local newts contain levels of TTX dangerous enough to dissuade most predators, and that Eastern Hog-nosed Snakes within newt range are highly resistant to TTX. In fact, these populations of Eastern Hog-nosed Snakes are so resistant to TTX that the potential for current reciprocal selection might be limited. Unlike all other cases of TTX resistance in vertebrates, H. platirhinos lacks the adaptive amino acid substitutions in the skeletal muscle sodium channel that reduce TTX binding, suggesting that physiological resistance in Eastern Hog-nosed Snakes is conferred by an alternate genetic mechanism. Thus, phenotypic convergence in this case is not due to parallel molecular evolution, indicating that there may be more than one way for this adaptation to arise, even among closely related species. PMID:26374236

  13. Analyze and experiment on AC magnetic field's effect to fiber optic gyroscopes in compact stabilization control systems

    Science.gov (United States)

    Zhang, Chao; Mao, Yao; Tian, Jing; Li, Zhijun

    2015-10-01

    Fiber optic gyroscopes (FOG) are getting more and more attention in areas such as stabilization control systems as they are all solid state and have a wide bandwidth. In stabilization systems that require wide bandwidth control, motors are usually used as actuating mechanism for active disturbance restrain. Voice coil motors (VCMs) are usually used in compact stabilization systems that require large torque and fast response. However, AC magnetic field, which can affect the output of FOG due to Faraday effect, will be generated during operation of VCMs. The frequency range affected by the AC magnetic field to the FOG's output is the same as VCMs drive signal frequency range, which is also exactly the stabilization system's working range. Therefore the effect of the AC magnetic field to FOGs must be evaluated to verify the feasibility of a stable system design that uses both FOGs and VCMs. In this article, the basic structure and operating principle of stabilization system is introduced. The influence of AC magnetic field to FOG is theoretically analyzed. The magnetic field generated by VCMs is numerically simulated based on the theory deduction of the magnetic field near energized wires. To verify the influence of the VCM generated magnetic field to the FOGs in practical designs, a simplified random fiber coil model is built for it's hard to accurately test the exact polarize axis's twisting rate in a fiber coil. The influence to the FOG's output of different random coil model is simulated and the result shows a same trend that the influence of the VCM's magnetic field to the FOG is reduced as the distance between the VCM and the FOG increasing. The influence of a VCM to a FOG with the same parameters is experimentally tested. In the Fourier transformed FOG data the same frequency point as the VCM drive signal frequency can be read. The result fit simulated result that as the distance increases, the influence decreases. The amplitude of the frequency point is just

  14. 垂直轴水轮机单向流固耦合数值研究%One way fluid and structure interaction numerical analysis of vertical axis tidal turbine

    Institute of Scientific and Technical Information of China (English)

    张亮; 何环宇; 张学伟; 马勇

    2014-01-01

    As for vertical axis turbine fluid-structure interaction problems ,using one-way FSI meth-od ,combined with uniform force and interpolation method ,the stress distribution of the blade ,the stress distribution ,displacement and the deformation of VAWT (vertical axis water turbine) were an-alyzed .The most danger state of the VAWT when it is rotating and the changing law with TSR (tip-speed ratio) were given .The results show that under a certain TSR ,azimuth angle is the most dan-gerous working condition when the impeller by the resultant force is the largest .The most dangerous azimuth increases as the TSR ,and gradually approaching the place where the blade chord line and the velocity direction is perpendicular ,that is 90° .The uniform force and interpolation method are used to analyze one-way FSI (fluid-solid interaction) of blades ,which can get the same change law ,and uni-form force method tends to be more conservative .%针对垂直轴水轮机流固耦合问题,采用均布力法和插值法相结合的单向流固耦合方法,在不同速比的工况下,分析叶片应力、水轮机整体应力、位移以及应变的变化规律,得出垂直轴水轮机在旋转过程中最危险工作方位角及其随速比变化的规律。结果表明:在一定速比下,当水轮机转到某一方位角时,叶轮受合力最大,此方位角为最危险工况;最危险方位角随着速比增大而增大,并逐渐接近叶片弦线与来流速度方向垂直的位置即90°;基于均布力法和插值法对水轮机叶片进行单向流固耦合分析,可以得到相同变化规律,在数值上均布力法更趋于保守。

  15. Effect of New Immunosuppressant-Rapamycin on One-way Mixed Lymphocyte Culture%雷帕霉素对异种单向混合淋巴细胞培养的免疫抑制作用

    Institute of Scientific and Technical Information of China (English)

    夏国伟; 张元芳; 丁强

    2004-01-01

    Objective: Observing human to mouse one-way mixed lymphocyte culture(xMIC) and the effect of new immunosuppressant-Rapamycin on XMIC. Methods: Mouse splenic lymphocyte were collected and treated by mitomycin as activating cell; Human Peripheral blood lymphocytes(hPBL)were separated and gathered as reacting cell;Mouse splenic lymphocyte and hPBL wee mixed to incubate for 1 week; The researchers designed control 、RPM groups,and experiment(drugs) grup have different concentration. Results: HPBL in the experiment groups (mixed mouse lymphocyte)proliferated obviously, the amount of3 H-TdR in corporation increased evidently( P < 0.05, The mean percentage of CD4, CD8, LgG, LgM positive cells rose markedly. HPBL in the experiment groups less proliferated, the amount of 3H-TdR incorporation declined,RPM' s ic50 (50% inhibition concentration)approximately in 1.5 nmol/L; the mean percentage of CD4, CD8, IgG, IgM positive cells fell obviously. Conclusion: The human to mouse one-way MLC has obvious lymphocyte proliferation. New immunosuppressants-Rapamycin have powerful effete on XMLC.%目的:观察新型免疫抑制剂雷帕霉素(Rapamycin,RPM)对异种单向混合淋巴细胞培养(one-way XMLC)的免疫抑制作用.方法:①无菌采集小鼠脾淋巴细胞,经丝裂毒素处理,作刺激细胞;②取健康成人外周血淋巴细胞(hPBL),作反应细胞;③异种单向混合淋巴细胞培养;④实验分对照组(不用药)、RPM组,实验组(用药组)又分不同药物浓度组.结果:①小鼠脾淋巴细胞明显刺激人外周血淋巴细胞(hPBL)增殖,3H-TdR掺入值(cpm)显著增高(P<0.05);CD4、CD8、IgG、IgM细胞含量明显升高,有显著差异(P<0.05).②各实验组的cpm值下降,RPM的IC50(50%有效抑制浓度)≈1.5nmol/L.测定各实验组的CD4,CDB,IgG,IgM细胞含量下降,药物的IC5o与上相似.结论:①人→小鼠单向混合淋巴细胞培养,具有明显细胞增殖反应.②RPM对异种单向混合淋巴细胞培养具有明显

  16. Experience of analyzing legislative and scientific components while choosing the assessment criteria in open competitions on design

    Directory of Open Access Journals (Sweden)

    Reshetova Anna Yur'evna

    2015-03-01

    their performance according to the specification on design of the capital construction project, which is an integral part of competitive documentation on purchase execution. With such criteria as “qualification of the participant of competition”, “experience in similar types of works”, “business reputation” and “existence of purchase of the material and other resources necessary for work performance”, with adoption of law on contract system, serious changes didn’t happen. The innovation of the legislation is only that now the customer has to establish minimum / extremely minimum and/or maximum / extremely maximum assessment value according to these criteria in competitive documentation. The assessment of applications will occur in this case according to legislatively certain mathematical formulas of calculation. On the basis of the above, considering a scientific component of this research, it is possible to tell that, despite some changes of an assessment criteria, in general the mechanism of their choice hasn’t been improved.

  17. Parallel Processing of Syntax Parsing Algorithm for UPD Grammar Based on One-way Cell Automata%基于单向点格自动机的UPG文法识别并行算法

    Institute of Scientific and Technical Information of China (English)

    李玉萍

    2016-01-01

    UPG文法是一种特殊的生成文法,在分析的过程中可以没有回溯。该文法能够更好地描述自然语言中特殊的语法结构。单向点格自动机是进行语言并行识别的模型。通过对该文法和点格自动机深入的分析,提出了一种在并行环境下基于点格自动机的无回溯的语法分析和识别算法。文章通过实例详细描述了算法并行处理的过程,验证算法的正确性和可行性。%A uniquely parsable grammar(UPD)is a special kind of generative grammar where parsing can be performed without backtracking. UPD grammars have greater generative power than the context-free grammars. This family of grammars and one-way cell automata is deeply analyzed. A recognition and parsing algorithm under Paral-lel environment is presented. The process of parallel processing is described by instance and the validity of the algo-rithm is verified.

  18. Response in electrostatic analyzers due to backscattered electrons: case study analysis with the Juno Jovian Auroral Distribution Experiment-Electron instrument.

    Science.gov (United States)

    Clark, G; Allegrini, F; Randol, B M; McComas, D J; Louarn, P

    2013-10-01

    In this study, we introduce a model to characterize electron scattering in an electrostatic analyzer. We show that electrons between 0.5 and 30 keV scatter from internal surfaces to produce a response up to ~20% of the ideal, unscattered response. We compare our model results to laboratory data from the Jovian Auroral Distribution Experiment-Electron sensor onboard the NASA Juno mission. Our model reproduces the measured energy-angle response of the instrument well. Understanding and quantifying this scattering process is beneficial to the analysis of scientific data as well as future instrument optimization. PMID:24182165

  19. 综合热分析仪在本科生实验教学中的应用%Applications of Thermal Gravimetric Analyzer in Undergraduates’ Innovative Experiments

    Institute of Scientific and Technical Information of China (English)

    于欣欣; 张利利; 戴鹏; 吴明在

    2015-01-01

    Base on the thermal gravimetric analysis of CuSO4 ·5H2 O,a simple and feasible experiment is de-signed for Undergraduates. We introduce the principle of thermal gravimetric analyzer,the operation steps,the analysis of the data and its values in undergraduates’ experiments.%以五水合硫酸铜的热重曲线的测量为例设计了一项简单易行的热综合分析仪的应用课程,介绍了热综合分析的实验原理,数据分析方法,阐述了将热综合分析仪在本科生实验教学中应用的重要性和可行性。

  20. Oxygen analyzer

    Science.gov (United States)

    Benner, William H.

    1986-01-01

    An oxygen analyzer which identifies and classifies microgram quantities of oxygen in ambient particulate matter and for quantitating organic oxygen in solvent extracts of ambient particulate matter. A sample is pyrolyzed in oxygen-free nitrogen gas (N.sub.2), and the resulting oxygen quantitatively converted to carbon monoxide (CO) by contact with hot granular carbon (C). Two analysis modes are made possible: (1) rapid determination of total pyrolyzable oxygen obtained by decomposing the sample at 1135.degree. C., or (2) temperature-programmed oxygen thermal analysis obtained by heating the sample from room temperature to 1135.degree. C. as a function of time. The analyzer basically comprises a pyrolysis tube containing a bed of granular carbon under N.sub.2, ovens used to heat the carbon and/or decompose the sample, and a non-dispersive infrared CO detector coupled to a mini-computer to quantitate oxygen in the decomposition products and control oven heating.

  1. Calibration experiments of 3He neutron detectors for analyzing neutron emissivity in the hot-ion mode on the GAMMA 10 tandem mirror

    Science.gov (United States)

    Kohagura, J.; Cho, T.; Hirata, M.; Watanabe, H.; Minami, R.; Numakura, T.; Yoshida, M.; Ito, H.; Tatematsu, Y.; Yatsu, K.; Miyoshi, S.; Ogura, K.; Kondoh, T.; Nishitani, T.; Kwon, M.; England, A. C.

    2003-03-01

    Under the international fusion cooperating research, 3He neutron detectors in the GAMMA 10 tandem mirror are calibrated by the use of a 252Cf spontaneous fission neutron source (8.96×104 n/s). The calibration experiments are carried out with a "rail system" placed along the magnetic axis of the GAMMA 10 central-cell region, where hot ions in the plasma experiments with the bulk temperatures of ˜10 keV are produced. As compared to a previous neutron monitoring system with a BF3 detector in GAMMA 10, the present 3He systems are designed with about two orders-of-magnitude higher neutron-counting efficiency for analyzing a neutron emissivity from the plasmas in a single plasma discharge alone. Two 3He systems are installed near the middle and the end of the central cell so as to identify the central-cell hot-ion axial profile. The filling pressure of 3He, the effective length, and the diameter of the detector are designed as 5 bar, 300 mm, and 50 mm, respectively. The detector output spectra are carefully analyzed by the use of a preamplifier, a shaping amplifier, as well as a multichannel analyzer for each 3He detector. In the present article, the neutron-counting data from the two 3He detectors due to the on-axis 252Cf scan are interpreted in terms of the d-2 intensity dependence (d being the distance between the detector and the neutron source) as well as the effects of the central-cell magnetic coils and the other machine structural components.

  2. Beauty is in the eye of the beholder: proteins can recognize binding sites of homologous proteins in more than one way.

    Directory of Open Access Journals (Sweden)

    Juliette Martin

    2010-06-01

    Full Text Available Understanding the mechanisms of protein-protein interaction is a fundamental problem with many practical applications. The fact that different proteins can bind similar partners suggests that convergently evolved binding interfaces are reused in different complexes. A set of protein complexes composed of non-homologous domains interacting with homologous partners at equivalent binding sites was collected in 2006, offering an opportunity to investigate this point. We considered 433 pairs of protein-protein complexes from the ABAC database (AB and AC binary protein complexes sharing a homologous partner A and analyzed the extent of physico-chemical similarity at the atomic and residue level at the protein-protein interface. Homologous partners of the complexes were superimposed using Multiprot, and similar atoms at the interface were quantified using a five class grouping scheme and a distance cut-off. We found that the number of interfacial atoms with similar properties is systematically lower in the non-homologous proteins than in the homologous ones. We assessed the significance of the similarity by bootstrapping the atomic properties at the interfaces. We found that the similarity of binding sites is very significant between homologous proteins, as expected, but generally insignificant between the non-homologous proteins that bind to homologous partners. Furthermore, evolutionarily conserved residues are not colocalized within the binding sites of non-homologous proteins. We could only identify a limited number of cases of structural mimicry at the interface, suggesting that this property is less generic than previously thought. Our results support the hypothesis that different proteins can interact with similar partners using alternate strategies, but do not support convergent evolution.

  3. There is more than one way to turn a spherical cellular monolayer inside out: type B embryo inversion in Volvox globator

    Directory of Open Access Journals (Sweden)

    Höhn Stephanie

    2011-12-01

    Full Text Available Abstract Background Epithelial folding is a common morphogenetic process during the development of multicellular organisms. In metazoans, the biological and biomechanical processes that underlie such three-dimensional (3D developmental events are usually complex and difficult to investigate. Spheroidal green algae of the genus Volvox are uniquely suited as model systems for studying the basic principles of epithelial folding. Volvox embryos begin life inside out and then must turn their spherical cell monolayer outside in to achieve their adult configuration; this process is called 'inversion.' There are two fundamentally different sequences of inversion processes in Volvocaceae: type A and type B. Type A inversion is well studied, but not much is known about type B inversion. How does the embryo of a typical type B inverter, V. globator, turn itself inside out? Results In this study, we investigated the type B inversion of V. globator embryos and focused on the major movement patterns of the cellular monolayer, cell shape changes and changes in the localization of cytoplasmic bridges (CBs connecting the cells. Isolated intact, sectioned and fragmented embryos were analyzed throughout the inversion process using light microscopy, confocal laser scanning microscopy, scanning electron microscopy and transmission electron microscopy techniques. We generated 3D models of the identified cell shapes, including the localizations of CBs. We show how concerted cell-shape changes and concerted changes in the position of cells relative to the CB system cause cell layer movements and turn the spherical cell monolayer inside out. The type B inversion of V. globator is compared to the type A inversion in V. carteri. Conclusions Concerted, spatially and temporally coordinated changes in cellular shapes in conjunction with concerted migration of cells relative to the CB system are the causes of type B inversion in V. globator. Despite significant similarities

  4. Analyzing binding data.

    Science.gov (United States)

    Motulsky, Harvey J; Neubig, Richard R

    2010-07-01

    Measuring the rate and extent of radioligand binding provides information on the number of binding sites, and their affinity and accessibility of these binding sites for various drugs. This unit explains how to design and analyze such experiments.

  5. Neutral Particle Analyzer Vertically Scanning Measurements of MHD-induced Energetic Ion Redistribution or Loss in the National Spherical Torus Experiment

    Energy Technology Data Exchange (ETDEWEB)

    S.S. Medley, R. Andre, R.E. Bell, D.S. Darrow, C.W. Domier, E.D. Fredrickson, N.N. Gorelenkov, S.M. Kaye, B.P. LeBlanc, K.C. Lee, F.M. Levinton, D. Liu, N.C. Luhmann, Jr., J.E. Menard, H. Park, D. Stutman, A.L. Roquemore, K. Tritz, H. Yuh and the NSTX Team

    2007-11-15

    Observations of magneto-hydro-dynamic (MHD) induced redistribution or loss of energetic ions measured using the vertically scanning capability of the Neutral Particle Analyzer diagnostic on the National Spherical Torus Experiment (NSTX) are presented along with TRANSP and ORBIT code analysis of the results. Although redistribution or loss of energetic ions due to bursting fishbone-like and low-frequency (f ~ 10 kHz) kinktype MHD activity has been reported previously, the primary goal of this work is to study redistribution or loss due to continuous Alfvénic (f ~ 20 – 150 kHz) modes, a topic that heretofore has not been investigated in detail for NSTX plasmas. Initial indications are that the former drive energetic ion loss whereas the continuous Alfvénic modes only cause redistribution and the energetic ions remain confined.

  6. One Way to Holland’

    DEFF Research Database (Denmark)

    Marselis, Randi; Schütze, Laura Maria

    2013-01-01

    Museums in many parts of the world are challenged by increased diversity within the populations that make up their potential audiences, and many museums of cultural history now acknowledge the culture of ethnic minority groups as an important subject in multiethnic societies. A central issue in t...

  7. Microfluidic one-way streets for algae

    Science.gov (United States)

    Dunkel, Jorn; Kantsler, Vasily; Polin, Marco; Goldstein, Raymond E.

    2012-02-01

    Controlling locomotion and transport of microorganisms is a key challenge in the development of future biotechnological applications. Here, we demonstrate the use of optimized microfluidic ratchets to rectify the mean swimming direction in suspensions of the unicellular green alga Chlamydomonas reinhardtii, which is a promising candidate for the photosynthetic production of hydrogen. To assess the potential of microfluidic barriers for the manipulation of algal swimming, we studied first the scattering of individual C. reinhardtii from solid boundaries. High-speed imaging reveals the surprising result that these quasi-spherical ``puller''-type microswimmers primarily interact with surfaces via direct flagellar contact, whereas hydrodynamic effects play a subordinate role. A minimal theoretical model, based on run-and-turn motion and the experimentally measured surface-scattering law, predicts the existence of optimal wedge-shaped ratchets that maximize rectification of initially uniform suspensions. We confirm this prediction in experimental measurements with different geometries. Since the mechano-elastic properties of eukaryotic flagella are conserved across many genera, we expect that our results and methods are applicable to a broad class of biflagellate microorganisms.

  8. Preserved amplitude migration based on the one way wave equation in the angle domain%基于单程波方程的角度域保幅偏移

    Institute of Scientific and Technical Information of China (English)

    叶月明; 李振春; 徐秀刚; 朱绪峰; 仝兆岐

    2009-01-01

    Traditional pre-stack depth migration can only provide subsurface structural information. However, simple structure information is insufficient for petroleum 'exploration which also needs amplitude information proportional to reflection coeffi.cients. In recent years, pre-stack depth migration algorithms which preserve amplitudes and based on the one-way wave equation have been developed. Using the method in the shot domain requires a de.convolution imaging condition which produces some instability in areas with complicated structure and dramatic lateral variation in velocity. Depth migration with preserved amplitude based on the angle domain can overcome the instability of the one-way wave migration imaging condition with preserved amplitude. It can also offer provide velocity analysis in the angle domain of common imaging point gathers. In this paper, based on the foundation of the one-way wave continuation operator with preserved amplitude, we realized the preserved amplitude prestack depth migration in the angle domain. Models and real data validate the accuracy of the method.

  9. 单向活瓣补片治疗合并重度肺动脉高压双向分流型室间隔缺损%One - way - valved patch for repair of ventricular septal defect with severe pulmonary hypertension with Bi-directional shunt

    Institute of Scientific and Technical Information of China (English)

    邵双印

    2009-01-01

    目的 总结本院自2003年至2008年用自制单向活瓣补片治疗合并重度肺动脉高压双向分流型室间隔缺损15例的经验.方法 对收治的15例合并重度肺动脉高压双向分流的室间隔缺损患者行单向活瓣补片修补室间隔缺损.结果 本组15例病人无手术死亡,疗效满意,1周时有7例右向左分流,3周时右向左分流消失.随访3个月病人自觉症状改善,肺动脉压下降.结论 单向活瓣补片能降低肺动脉高压危象的发生率,降低围术期死亡率,围术期的管理也非常重要.%Objective To summerize the surgical effect with one - way - valved patch to treat vetricular septal de-feet with severe pulmonary hypertension with bi - directional shunt since 2003. Methods The materials of 15 patients with ventricular septal defect and severe PH with bi- directional shunt who were treated by one- way- valved patch were ana-lyzed. Results No patient died in hospital after operation due to pulmonary hypertention crisis and the low output of left ventrical. Most patients felt better than preoperation and their pulmonary artery pressure decreased gradually. Conclusions One -way -valved patch is useful in decreasing the rate of perioparative pulmonary hypertension crisis and perioperation mortality. The perioperative therapy and prioperative evaluation are also essential to raise surgical operation effect.

  10. Analyzing Workforce Education. Monograph.

    Science.gov (United States)

    Texas Community & Technical Coll. Workforce Education Consortium.

    This monograph examines the issue of task analysis as used in workplace literacy programs, debating the need for it and how to perform it in a rapidly changing environment. Based on experiences of community colleges in Texas, the report analyzes ways that task analysis can be done and how to implement work force education programs more quickly.…

  11. One-Way Traffic Organization Optimization Method Based on Network Impedance and Traffic Efficiency%基于路网阻抗及交通效率的单向交通组织优化方法

    Institute of Scientific and Technical Information of China (English)

    张胜凯; 黄文娟; 韩高峰

    2012-01-01

    To improve the utilization of branch roads and reduce the traffic pressure on arterial roads, the optimization approach of one-way traffic organization is proposed from the view of reducing network impedance and improving traffic efficiency. The bievel programming model is developed with the objective of minimizing network impedance and travel time. The minimum objectixie value of the upper model is obtained by optimizing one-way traffic, and the lower one adopts the capacity limitation-incremental loading method to distribute traffic flow. Through establishing virtual road network, the effectiveness of one-way traffic organization is proved by comparing the network impedance and travel time before and after optimization.%为提高支路的利用率,以降低主干道的交通压力,从降低路网阻抗及提高交通效率的角度出发,提出单向交通组织的优化方法。建立以路网阻抗及出行时间最小化为目标的双层优化模型,其中上层模型通过优化支路的单向交通组织方案使得目标值达到最小,下层模型按照容量限制——增量加栽方法进行交通量的重分配。通过建立虚拟路网,类比分析单向交通组织优化前后的路网阻抗及出行时间,验证单向交通组织的优化效果。

  12. Analyzing radioligand binding data.

    Science.gov (United States)

    Motulsky, Harvey; Neubig, Richard

    2002-08-01

    Radioligand binding experiments are easy to perform, and provide useful data in many fields. They can be used to study receptor regulation, discover new drugs by screening for compounds that compete with high affinity for radioligand binding to a particular receptor, investigate receptor localization in different organs or regions using autoradiography, categorize receptor subtypes, and probe mechanisms of receptor signaling, via measurements of agonist binding and its regulation by ions, nucleotides, and other allosteric modulators. This unit reviews the theory of receptor binding and explains how to analyze experimental data. Since binding data are usually best analyzed using nonlinear regression, this unit also explains the principles of curve fitting with nonlinear regression.

  13. A Novel Method For One-way Hash Function Construction Based on the Couple Map lattices%一种基于改进的CML的Hash函数算法

    Institute of Scientific and Technical Information of China (English)

    杨雪

    2011-01-01

    本文将标准的耦合映象格子模型进行一定改进,提出了一种基于改进的耦合映象格子的Hash函数构造算法。理论分析,仿真试验和对比分析表明此算法也具有很好的统计特性,抗碰撞性和灵活性。%Based on the couple map lattices (CML), a novel scheme for constructing Hash functions is proposed in this paper. Additionally, the algorithm has good statistical properties, excellent one-way, confusion and diffusion strong collision resistance.

  14. 长距离供水工程单向塔设置分析%Study on water hammer control by one-way surge tank in long-distance water-supply project

    Institute of Scientific and Technical Information of China (English)

    张健; 索丽生; 胡建永; 马世波

    2011-01-01

    Arrangement of one-way surge tank that is an effective measure for water hammer control is crucial to the safety of long-distance water-supply project.This paper establishes a general framework of theoretical analysis and numerical optimization for the tank arrangement by using water hammer analysis with a criterion of avoiding negative pressure during operation.A general rule of arrangement on long-distance water-supply pipeline under different conditions is proposed, and the relationship between tank location and tank height is demonstrated.Application of numerical simulation aiming at arrangement optimization to a practical project suggests that the proposed framework provides an effective approach for the design of one-way surge tank.%单向塔作为长距离有压供水工程重要的水锤防护措施,其合理布置涉及到工程运行安全.本文以水锤分析为基础,在确保管道运行不出现负压的前提下,构建了单向塔布置的理论分析和数值优化总体框架,明确了多个串联单向塔的设置位置与高度的关系,提出了不同工况下长距离供水管线中设置单向塔应满足的通用准则,同时结合工程实例,通过数值仿真进行了单向塔布置方案的优化,为长距离供水管道中单向塔的合理布置提供了科学依据.

  15. Effect of time walk in the use of single channel analyzer/discriminator for saturated pulses in the 4πβ-γ coincidence experiments.

    Science.gov (United States)

    Kawada, Yasushi; Yunoki, Akira; Yamada, Takahiro; Hino, Yoshio

    2016-03-01

    Using the TAC technique, the timing properties of a 4πβ-γ coincidence counting system were experimentally studied with an emphasis on saturated pulses. Experiments were performed for several discriminators (integral mode of TSCA) each with different kinds of timing techniques. Timing spectra were measured at various applied voltage to the 4π proportional detector covering the entire region of the plateau. Most of timing discriminators show good timing property when the pulses remain the linear region, but suddenly deteriorate after the pulses was saturated, and the timing spectra expands seriously up to a few μs in some types of timing discriminator. To overcome this problem, two techniques were proposed. PMID:26699675

  16. Developing Programs of Supervised Agricultural Experience. Developing an SAE Program Using the Missouri Agricultural Record Book for Secondary Students. Analyzing the SAE Program Using the Missouri Farm Business Record Book. Instructor's Guide. Volume 21, Number 9.

    Science.gov (United States)

    Admire, Myron

    This curriculum guide to the Supervised Agricultural Experience (SAE) program contains four units of insturctor's materials as follows: Unit 1: Developing an SAE Program; Unit 2: Using the Missouri Agricultural Record Book for Secondary Students; Unit 3: Analyzing the SAE Program; and Unit 4: Using the Missouri Farm Business Record Book. The…

  17. 肺梗死的误诊分析与体会%To Analyze and Experience the Misdiagnose of Pulmonary Infarction

    Institute of Scientific and Technical Information of China (English)

    张艳

    2013-01-01

      目的:肺梗死临床表现和影像表现复杂多样,误、漏诊率高.方法:本研究通过回顾性分析在笔者所在医院诊治的22例肺梗死患者的临床资料,总结其误诊原因,以对肺梗死及时、准确的诊断,减少误诊率和死亡率.结果:22例患者确诊后给予尿激酶溶栓及肝素、华法令抗凝治疗,然而由于开始阶段认识不足,未能采取积极的溶栓治疗,有7例死亡,死亡率高达31.8%,尸检证实均为肺梗死;其余住院治疗17~30 d,平均24 d,出院后继续抗凝治疗.结论:肺梗死误诊率高达79%,未经积极治疗病死率接近30%,而及时诊断治疗者病死率可降至2%~8%,因此及时准确诊断出肺梗死是关键.%Objective:Clinical and imaging performance of pulmonary infarction is complicated,mistakenly and missed diagnosis ratio is high. Methods:The clinical data of 22 cases with pulmonary infarction were retrospectively analyzed.We summed up the cause of misdiagnosis of this disease,to prompt the correct diagnosis in time,to reduce the misdiagnosis rate and death rate.Results:22 patients after diagnosis given urokinase and heparin,warfarin therapy,due to the lack of knowledge of the beginning,however,failed to take an active thrombolytic therapy,with 7 deaths,a mortality rate as high as 31.8%, the autopsy confirmed arepulmonary infarction;remaining hospitalized 17-30 d,average 24 d,continue anticoagulation therapy after discharge. Conclusion:Pulmonary infarction misdiagnosis rate as high as 79%,without aggressive treatment of the case fatality rate of nearly 30%,and timely diagnosis and treatment of mortality can be reduced to 2%-8%,therefore,timely and accurate diagnosis of pulmonary infarction is the key.

  18. A One-Way Hash Function-Based Key Management Scheme for WirelessHART Networks%一种基于单向散列函数的WirelessHART网络密钥管理方案

    Institute of Scientific and Technical Information of China (English)

    雷路路; 沈继忠; 董利达

    2011-01-01

    A one-way hash function-based key management scheme for WirelessHART networks is proposed, which ensures forward and backward secrety and provides broadcast authentication and key renewal strategy after node being captured. Double hash key chains are used to realize broadcast authentication for key renewal and to solve the problem that the renewal times of the whole network share keys are limited. Broadcast and unicast communications are combined to enforce the reliability of key renewal in WirelessHART networks. Compared with the existing key management scheme for WirelessHART networks, the proposed scheme improves the network's security and reduces the network's communication energy consumption without increasing the computing energy consumption and memory overhead.%为保证WirelessHART网络的前向安全及后向安全,提供密钥更新的广播认证和节点被捕获后的密钥更新策略,提出了一种基于单向散列函数的WirelessHART网络密钥管理方案.引入双散列密钥链实现密钥更新的广播认证,解决了全网共享密钥更新次数受限的问题,结合广播和单播通信执行全网共享密钥更新,增强了密钥更新的可靠性.与现有的WirelessHART网络密钥管理方案相比,在不增加节点计算能耗和存储开销的情况下,提高了WirelessHART网络的安全性,并降低了网络的通信能耗.

  19. A drenagem pleural pré-hospitalar: apresentação de mecanismo de válvula unidirecional Pre-hospital chest drainage: presention one-way valve mechanism

    Directory of Open Access Journals (Sweden)

    Alexandre Garcia de Lima

    2006-04-01

    Full Text Available OBJETIVO: O objetivo do presente estudo é apresentar um mecanismo de válvula unidirecional para substituição do selo de água na drenagem pleural tubular fechada, em ambiente pré-hospitalar, bem como registrar os resultados de seu uso inicial no SAMU-Campinas/SP/Brasil. MÉTODO: Foram realizadas 22 (vinte e duas drenagens pleurais com válvula em doentes vítimas de traumatismo ou pneumotórax espontâneo, todos em ambiente pré-hospitalar, de forma prospectiva, não randomizada. RESULTADOS: O débito total de líquidos através da válvula variou de zero a 1500 ml, com média de 700 ± 87,4 ml, para um tempo de percurso em média de 18 ± 1,1 minutos, variando de 8 a 26 minutos. A frequência cardíaca inicial foi 120 ± 2,7 bpm e final de 100 ± 2 bpm (p 0,00 e a frequência respiratória inicial foi 24 ± 0,8 ipm e o valor final foi de 15 ± 0,3 ipm (p 0,03. Houve apenas duas falhas mecânicas do sistema e uma foi corrigida pela substituição da mesma, trazudindo num índice de sucesso de 95,4% neste trabalho. CONCLUSÃO: Levando em conta exame físico inicial com o exame físico final, bem como pela quantificação de débitos, concluímos que a válvula mostrou-se eficiente e funcionante, e que é segura para o uso em urgências pré-hospitalares.BACKGROUND: The purpose of this study is to present an one-way valve mechanism to replace the underwater seal for pleural drainage, currently used in the prehospital attendance, as well as document preliminary results of its initial use at SAMUCampinas/ SP/Brasil. METHODS: Twenty two pleural drains with the valve were carried out, all of these in prehospital environment, in patients who suffered thoracic trauma or spontaneous pneumothorax, in a prospective not randomized trial. RESULTS: The total volume output drained through the valve ranged from 0 to 1500 ml, mean 700 ± 87,4 ml, in an average time lag of 18 minutes (± 1,1 minutes - ranging from 8 to 26 minutes. The initial and final

  20. Soft Decision Analyzer

    Science.gov (United States)

    Steele, Glen; Lansdowne, Chatwin; Zucha, Joan; Schlensinger, Adam

    2013-01-01

    The Soft Decision Analyzer (SDA) is an instrument that combines hardware, firmware, and software to perform realtime closed-loop end-to-end statistical analysis of single- or dual- channel serial digital RF communications systems operating in very low signal-to-noise conditions. As an innovation, the unique SDA capabilities allow it to perform analysis of situations where the receiving communication system slips bits due to low signal-to-noise conditions or experiences constellation rotations resulting in channel polarity in versions or channel assignment swaps. SDA s closed-loop detection allows it to instrument a live system and correlate observations with frame, codeword, and packet losses, as well as Quality of Service (QoS) and Quality of Experience (QoE) events. The SDA s abilities are not confined to performing analysis in low signal-to-noise conditions. Its analysis provides in-depth insight of a communication system s receiver performance in a variety of operating conditions. The SDA incorporates two techniques for identifying slips. The first is an examination of content of the received data stream s relation to the transmitted data content and the second is a direct examination of the receiver s recovered clock signals relative to a reference. Both techniques provide benefits in different ways and allow the communication engineer evaluating test results increased confidence and understanding of receiver performance. Direct examination of data contents is performed by two different data techniques, power correlation or a modified Massey correlation, and can be applied to soft decision data widths 1 to 12 bits wide over a correlation depth ranging from 16 to 512 samples. The SDA detects receiver bit slips within a 4 bits window and can handle systems with up to four quadrants (QPSK, SQPSK, and BPSK systems). The SDA continuously monitors correlation results to characterize slips and quadrant change and is capable of performing analysis even when the

  1. 相对差分单向测距(△DOR)技术在探月工程中的应用研究%Applications of Delta Differential One-way Ranging (△DOR) to Lunar Exploration Program

    Institute of Scientific and Technical Information of China (English)

    丁溯泉; 李海涛

    2011-01-01

    Delta Differential One-way Ranging (△DOR) is used for high precision angle measure- ment in many deep space exploration programs. The fundamentals of ADOR are introduced. Also, recommendations about ADOR of CCSDS (Consultative Committee for Space Data System) are presented. According to the high precision and real-time navigation requirements, the ADOR measurement schemes are designed for China's lunar exploration program whose current object is soft-land on the moon. The angle measurement precisions are analyzed in terms of the current performances of on-board and ground TT&C equipments. The resolution of the cycle ambiguity is presented. Research results show that the angle measurement precision is 25 nrad, which corresponds to about 10 m on the moon. Further, the cycle ambiguity of DOR measurements can be resolved correctly.%相对差分单向测距(△DOR)是一种高精度测角技术,在深空探测任务的高精度测定轨方案中得到广泛应用.介绍了△DOR测量的基本原理及CCSDS(国际空间数据系统委员会)关于△测量的相关标准.针对中国探月工程月面软着陆任务提出的高精度测定轨要求,分析了△DOR测量的信号形式、工作模式以及测量精度,推导了解模糊过程.研究表明,△DOR测角精度达到25nrad,对应到月球上的距离约为10m.

  2. The Intermodulation Lockin Analyzer

    CERN Document Server

    Tholen, Erik A; Forchheimer, Daniel; Schuler, Vivien; Tholen, Mats O; Hutter, Carsten; Haviland, David B

    2011-01-01

    Nonlinear systems can be probed by driving them with two or more pure tones while measuring the intermodulation products of the drive tones in the response. We describe a digital lock-in analyzer which is designed explicitly for this purpose. The analyzer is implemented on a field-programmable gate array, providing speed in analysis, real-time feedback and stability in operation. The use of the analyzer is demonstrated for Intermodulation Atomic Force Microscopy. A generalization of the intermodulation spectral technique to arbitrary drive waveforms is discussed.

  3. The Automatic Diagnosis Technology of the One-way Valve Malfunction of the Reciprocating Piston Diaphragm Pump%往复式活塞隔膜泵单向阀故障自动诊断技术

    Institute of Scientific and Technical Information of China (English)

    杨宏权; 张金伟

    2012-01-01

    As the development of China economy,the areas such as mine industry,nonferrous industry and chemical industry continue to grow and develop,in which reciprocating piston diaphragm pump used for the transportation of mineral slurry,alumina stripping,chemical reaction furnace feeding has been widely applied.Because of many reasons,the phenomenon like check valve failure and leaking always exist in the equipment,which bring a lot of harm to technical system.The reason for check valve failure was analyzed in this paper and the automatic diagnosing and alarming technology was developed,which can effectively avoid or reduce the harm of check valve failure.%随着我国经济持续增长,国内的矿山、有色、化工等领域不断发展壮大,其中用于矿浆输送、氧化铝溶出、化工反应炉喂料等方面的往复式活塞隔膜泵也得到了大量应用,由于多种原因设备经常会出现单向阀卡阀、泄漏现象,给设备和工艺系统带来很大危害。文章从隔膜泵工作机理方面入手,分析了单向阀故障产生的原因,提出了单向阀故障的自动诊断及报警技术,可以有效避免或减轻单向阀故障带来的危害。

  4. Miniature mass analyzer

    CERN Document Server

    Cuna, C; Lupsa, N; Cuna, S; Tuzson, B

    2003-01-01

    The paper presents the concept of different mass analyzers that were specifically designed as small dimension instruments able to detect with great sensitivity and accuracy the main environmental pollutants. The mass spectrometers are very suited instrument for chemical and isotopic analysis, needed in environmental surveillance. Usually, this is done by sampling the soil, air or water followed by laboratory analysis. To avoid drawbacks caused by sample alteration during the sampling process and transport, the 'in situ' analysis is preferred. Theoretically, any type of mass analyzer can be miniaturized, but some are more appropriate than others. Quadrupole mass filter and trap, magnetic sector, time-of-flight and ion cyclotron mass analyzers can be successfully shrunk, for each of them some performances being sacrificed but we must know which parameters are necessary to be kept unchanged. To satisfy the miniaturization criteria of the analyzer, it is necessary to use asymmetrical geometries, with ion beam obl...

  5. Analyzing in the present

    DEFF Research Database (Denmark)

    Revsbæk, Line; Tanggaard, Lene

    2015-01-01

    the interdependency between researcher and researched. On this basis, we advocate an explicit “open-state-of mind” listening as a key aspect of analyzing qualitative material, often described only as a matter of reading transcribed empirical materials, reading theory, and writing. The article contributes......The article presents a notion of “analyzing in the present” as a source of inspiration in analyzing qualitative research materials. The term emerged from extensive listening to interview recordings during everyday commuting to university campus. Paying attention to the way different parts...... of various interviews conveyed diverse significance to the listening researcher at different times became a method of continuously opening up the empirical material in a reflexive, breakdown-oriented process of analysis. We argue that situating analysis in the present of analyzing emphasizes and acknowledges...

  6. Software Design Analyzer System

    Science.gov (United States)

    Tausworthe, R. C.

    1985-01-01

    CRISP80 software design analyzer system a set of programs that supports top-down, hierarchic, modular structured design, and programing methodologies. CRISP80 allows for expression of design as picture of program.

  7. Fragment mass analyzer project

    Energy Technology Data Exchange (ETDEWEB)

    Davids, C.N.; Back, B.B.; Blumenthal, D.J. [and others

    1995-08-01

    The FMA is now in routine operation, with about half the ATLAS experiments using the instrument. The beam time is split equally between target and focal-plane experiments. New spectroscopy-grade electronics for the FMA implantation system were acquired. This consists of 96 charge-sensitive preamps, 192 Gaussian shaping amplifier/discriminators, 96 channels of high-resolution ADCs, and 96 channels of medium resolution ADCs. This system is currently undergoing commissioning tests, and will be used in future proton radioactivity experiments.

  8. PhosphoSiteAnalyzer

    DEFF Research Database (Denmark)

    Bennetzen, Martin V; Cox, Jürgen; Mann, Matthias;

    2012-01-01

    Phosphoproteomic experiments are routinely conducted in laboratories worldwide, and because of the fast development of mass spectrometric techniques and efficient phosphopeptide enrichment methods, researchers frequently end up having lists with tens of thousands of phosphorylation sites for furt...

  9. Total organic carbon analyzer

    Science.gov (United States)

    Godec, Richard G.; Kosenka, Paul P.; Smith, Brian D.; Hutte, Richard S.; Webb, Johanna V.; Sauer, Richard L.

    1991-01-01

    The development and testing of a breadboard version of a highly sensitive total-organic-carbon (TOC) analyzer are reported. Attention is given to the system components including the CO2 sensor, oxidation reactor, acidification module, and the sample-inlet system. Research is reported for an experimental reagentless oxidation reactor, and good results are reported for linearity, sensitivity, and selectivity in the CO2 sensor. The TOC analyzer is developed with gravity-independent components and is designed for minimal additions of chemical reagents. The reagentless oxidation reactor is based on electrolysis and UV photolysis and is shown to be potentially useful. The stability of the breadboard instrument is shown to be good on a day-to-day basis, and the analyzer is capable of 5 sample analyses per day for a period of about 80 days. The instrument can provide accurate TOC and TIC measurements over a concentration range of 20 ppb to 50 ppm C.

  10. 以北京故宫为例分析中国传统建筑中的“神性”体验%Taking The Forbidden City as example to analyze the divine experience of traditional Chinese architecture

    Institute of Scientific and Technical Information of China (English)

    王琳静

    2013-01-01

    神性体验是建筑所传达的一种特殊氛围与感受,并不仅仅指狭义上对神权的敬畏,对于神权并不占统治地位的中国,其建筑的“神性”主要表现为宗教,礼制,精神体验三个方面。本文用建筑现象学的研究方法来观察,体验并总结中国传统建筑所独有的神性特征,选取北京故宫为主要案例分析各种类型的建筑层层围合,高远的空间特征,强烈的轴线感与中心感,色彩的对比性及秩序性等特点,揭示了中国传统建筑神性现象背后所蕴含的建筑原理。%The concept of divine experience is not only confined as the fear of theocracy, but also a special atmosphere and feeling conveyed by architectures. As theocracy was not dominant, the divinity of traditional Chinese architecture was ex-pressed mainly by religion, ritual system and spiri-tual experience. The unique characteristics that tra-ditional Chinese architecture had alone were observed, experienced and summarized in this pa-per by using the methods of architectural phenomenology. The Forbidden City was taken as an example to analyze the characteristics of various types of architecture, such as the enclosure and rise of space, strong feeling of axis and centre, contrast of colors and orderly construction. And the archi-tectonics hidden behind the divinity of traditional Chinese architecture was then revealed.

  11. Experience

    Directory of Open Access Journals (Sweden)

    Michele Grieco

    2015-01-01

    Full Text Available Abdominoplasty is one of the most popular body-contouring procedures. It is associated with a significant number of complications: the most common ones are seroma, hematoma, infection, wound-healing problems, and skin flap necrosis. From January 2012 to December 2014, 25 patients (18 women and 7 men (mean age: 51 years underwent abdominoplastic surgery at the Plastic Surgery Section, Department of Surgical Sciences, University of Parma, Italy. All patients reported a weight loss between 15 kg and 47 kg. All of the of 25 patients were included in the study; minor and major complications were seen in 17 (68% and 8 (32% patients, respectively. The percentage of complications in our patients was as follows: 9 patients with seroma (36%; 4 patients with wound dehiscence with delayed wound healing (16%; 3 cases with hematoma (12%; 2 patients with postoperative bleeding (8%; 1 patient (4% with an umbilical necrosis; 1 patient (4% with a deep vein thrombosis; 3 patients with infected seroma (12%; and 2 patients with wound infection (8%. There were no cases of postoperative mortality. The aim of this study is to analyze our complications in postbariatric abdominoplasty.

  12. List mode multichannel analyzer

    Science.gov (United States)

    Archer, Daniel E.; Luke, S. John; Mauger, G. Joseph; Riot, Vincent J.; Knapp, David A.

    2007-08-07

    A digital list mode multichannel analyzer (MCA) built around a programmable FPGA device for onboard data analysis and on-the-fly modification of system detection/operating parameters, and capable of collecting and processing data in very small time bins (<1 millisecond) when used in histogramming mode, or in list mode as a list mode MCA.

  13. Centrifugal analyzer development

    International Nuclear Information System (INIS)

    The development of the centrifuge fast analyzer (CFA) is reviewed. The development of a miniature CFA with computer data analysis is reported and applications for automated diagnostic chemical and hematological assays are discussed. A portable CFA system with microprocessor was adapted for field assays of air and water samples for environmental pollutants, including ammonia, nitrates, nitrites, phosphates, sulfates, and silica. 83 references

  14. Analyzing business models

    DEFF Research Database (Denmark)

    Nielsen, Christian

    2014-01-01

    , because the costs of processing and analyzing it exceed the benefits indicating bounded rationality. Hutton (2002) concludes that the analyst community’s inability to raise important questions on quality of management and the viability of its business model inevitably led to the Enron debacle. There seems...

  15. Lear CAN analyzer

    OpenAIRE

    Peiró Ibañez, Felipe

    2013-01-01

    Since it was introduced in the automotive industry, the protocol CAN (Controller Area Network) has been widely used for its benefits. This has led many companies to offer several hardware and software solutions in order to monitor the communications that gives this protocol. The current master thesis presents the Lear CAN Analyzer as a software tool developed within the company LEAR Corporation. It is designed to be used in the automobile industry as a complement or substitute for other co...

  16. Radioisotope analyzer of barium

    International Nuclear Information System (INIS)

    Principle of operation and construction of radioisotope barium sulphate analyzer type MZB-2 for fast determination of barium sulphate content in barite ores and enrichment products are described. The gauge equipped with Am-241 and a scintillation detector enables measurement of barium sulphate content in prepared samples of barite ores in the range 60% - 100% with the accuracy of 1%. The gauge is used in laboratories of barite mine and ore processing plant. 2 refs., 2 figs., 1 tab. (author)

  17. IPv6 Protocol Analyzer

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    With the emerging of next generation Intemet protocol (IPv6), it is expected to replace the current version of Internet protocol (IPv4) that will be exhausted in the near future. Besides providing adequate address space, some other new features are included into the new 128 bits of IP such as IP auto configuration, quality of service, simple routing capability, security, mobility and multicasting. The current protocol analyzer will not be able to handle IPv6 packets. This paper will focus on developing protocol analyzer that decodes IPv6 packet. IPv6 protocol analyzer is an application module,which is able to decode the IPv6 packet and provide detail breakdown of the construction of the packet. It has to understand the detail construction of the IPv6, and provide a high level abstraction of bits and bytes of the IPv6 packet.Thus it increases network administrators' understanding of a network protocol,helps he/she in solving protocol related problem in a IPv6 network environment.

  18. Monolingual:One Way towards the Integrated Software Development Environment

    Institute of Scientific and Technical Information of China (English)

    王振宇

    1989-01-01

    The software development is considered as step wise abstract-implementation process in software life cycle.This paper presents a monolingual methodology and an embry of MONOL which uses a uniform scheme to describe software development process.

  19. On-Line Learning: One Way to Bring People Together

    Science.gov (United States)

    Goff-Kfouri, Carol Ann

    2006-01-01

    The purpose of this study was to demonstrate the benefits of on-line learning for adult learners and to further demystify three common misconceptions concerning on-line learning: students certainly do receive support from their on-line professors, the professor is pro-active rather than passive, and students may be more motivated to learn than in…

  20. One-way quantum identity authentication based on public key

    Institute of Scientific and Technical Information of China (English)

    ZHANG XingLan

    2009-01-01

    Based on public key, a quantum identity authenticated (QIA) system is proposed without quantum entanglement. The public key acts as the authentication key of a user. Following the idea of the classical public key infrastructure (PKI), a trusted center of authentication (CA) is involved. The user selects a public key randomly and CA generates a private key for the user according to his public key. When it is necessary to perform QIA, the user sends a sequence of single photons encoded with its private key and a message to CA. According to the corresponding secret key kept by CA, CA performs the unitary operations on the single photon sequence. At last, the receiver can judge whether the user is an impersonator.

  1. Dynamic one-way traffic control in automated transportation systems

    NARCIS (Netherlands)

    Ebben, M; van der Zee, DJ

    2004-01-01

    In a project on underground freight transportation using Automated Guided Vehicles, single lanes for traffic in two directions are constructed to reduce infrastructure investment. Intelligent control rules are required to manage vehicle flows such, that collision is avoided and waiting times are min

  2. Guns and Fear: A One-Way Street?

    Science.gov (United States)

    Hauser, Will; Kleck, Gary

    2013-01-01

    Surveys show that more than one half of gun owners report owning their firearm for self-protection. Although research has examined the effect of fear of crime on gun ownership, the issue of reciprocity and temporal order has been largely ignored. Furthermore, the effect of firearm acquisition and relinquishment on fear has not been evaluated…

  3. Loss tolerant one-way quantum computation -- a horticultural approach

    CERN Document Server

    Varnava, M; Rudolph, T; Varnava, Michael; Browne, Daniel E.; Rudolph, Terry

    2005-01-01

    We introduce a scheme for fault tolerantly dealing with losses in cluster state computation that can tolerate up to 50% qubit loss. This is achieved passively - no coherent measurements or coherent correction is required. We then use this procedure within a specific linear optical quantum computation proposal to show that: (i) given perfect sources, detector inefficiencies of up to 50% can be tolerated and (ii) given perfect detectors, the purity of the photon source (overlap of the photonic wavefunction with the desired single mode) need only be greater than 66.6% for efficient computation to be possible.

  4. Ants can learn to forage on one-way trails.

    Directory of Open Access Journals (Sweden)

    Pedro Leite Ribeiro

    Full Text Available The trails formed by many ant species between nest and food source are two-way roads on which outgoing and returning workers meet and touch each other all along. The way to get back home, after grasping a food load, is to take the same route on which they have arrived from the nest. In many species such trails are chemically marked by pheromones providing orientation cues for the ants to find their way. Other species rely on their vision and use landmarks as cues. We have developed a method to stop foraging ants from shuttling on two-way trails. The only way to forage is to take two separate roads, as they cannot go back on their steps after arriving at the food or at the nest. The condition qualifies as a problem because all their orientation cues -- chemical, visual or any other -- are disrupted, as all of them cannot but lead the ants back to the route on which they arrived. We have found that workers of the leaf-cutting ant Atta sexdens rubropilosa can solve the problem. They could not only find the alternative way, but also used the unidirectional traffic system to forage effectively. We suggest that their ability is an evolutionary consequence of the need to deal with environmental irregularities that cannot be negotiated by means of excessively stereotyped behavior, and that it is but an example of a widespread phenomenon. We also suggest that our method can be adapted to other species, invertebrate and vertebrate, in the study of orientation, memory, perception, learning and communication.

  5. Analyzing and Validating Experiments for the Performance of Small Space Electrostatic Discharge Test Device%静电放电小空间测试装置性能分析与验证实验

    Institute of Scientific and Technical Information of China (English)

    杜磊; 刘卫东; 王阳阳

    2012-01-01

    为了满足核辐射条件下静电放电(ESD)瞬态脉冲场小空间测试的需要,基于有源电光调制法研制了一种经济实用的传感器,并利用该传感器搭建了光纤传输式瞬态电场测试装置。在介绍传感器设计与研制过程的基础上,对测试装置的电性能进行了实验研究。通过频域信号注入实验、方波脉冲注入实验及方波脉冲辐照实验,对测试装置的响应时间以及线性度等指标进行了性能分析;通过ESD脉冲辐照实验,对测试装置性能进行了综合验证。实验结果表明,该测试装置的响应时间〈1ns,可用于ns级辐射场测试;其线性度良好,通过调整天线负载电容的取值可以调节测试灵敏度。该测试装置可用于静电放电辐射场的时域测试,能够在小空间测试静电放电瞬态脉冲场。%To satisfy the demands of small space tests which are applied in electrostatic discharge (ESD) transient pulse field under nuclear radiation, an economical sensor based on active optical electric modulation method was designed and employed to build a fiber-optical electric field test device. Moreover, the sensor designing guideline was outlined, and some experiments for analyzing the performance of the test device were discussed in detail. Through experiments of frequency signal injection, square impulse injection and square impulse radiation, the response time and the linear degree of the proposed device were analyzed. Furthermore, the performances of the device were validated by means of ESD radiation. The experimental results show that the response time of the device is less than 1 ns, which is capable of ns level radiating field test, and the linear degree is well. The sensitivity can be adjusted by means of regulating the load capacitance of the receiving antenna. The proposed device can be utilized in time domain tests for ESD radiating field and in small space tests for ESD transient pulse field.

  6. Building and analyzing models from data by stirred tank experiments for investigation of matrix effects caused by inorganic matrices and selection of internal standards in Inductively Coupled Plasma-Atomic Emission Spectroscopy

    Energy Technology Data Exchange (ETDEWEB)

    Grotti, Marco [Dipartimento di Chimica e Chimica Industriale, Via Dodecaneso 31, 16146 Genova (Italy)], E-mail: grotti@chimica.unige.it; Paredes, Eduardo; Maestre, Salvador; Todoli, Jose Luis [Departamento de Quimica Analitica, Nutricion y Bromatologia, Universidad de Alicante, 03080, Alicante (Spain)

    2008-05-15

    Interfering effects caused by inorganic matrices (inorganic acids as well as easily ionized elements) in inductively coupled plasma-atomic emission spectroscopy have been modeled by regression analysis of experimental data obtained using the 'stirred tank method'. The main components of the experimental set-up were a magnetically-stirred container and two peristaltic pumps. In this way the matrix composition was gradually and automatically varied, while the analyte concentration remained unchanged throughout the experiment. An inductively coupled plasma spectrometer with multichannel detection based on coupled charge device was used to simultaneously measure the emission signal at several wavelengths when the matrix concentration was modified. Up to 50 different concentrations were evaluated in a period of time of 10 min. Both single interfering species (nitric, hydrochloric and sulphuric acids, sodium and calcium) and different mixtures (aqua regia, sulfonitric mixture, sodium-calcium mixture and sodium-nitric acid mixture) were investigated. The dependence of the emission signal on acid concentration was well-fitted by logarithmic models. Conversely, for the easily ionized elements, 3-order polynomial models were more suitable to describe the trends. Then, the coefficients of these models were used as 'signatures' of the matrix-related signal variations and analyzed by principal component analysis. Similarities and differences among the emission lines were highlighted and discussed, providing a new insight into the interference phenomena, mainly with regards to the combined effect of concomitants. The combination of the huge amount of data obtained by the stirred tank method in a short period of time and the speed of analysis of principal component analysis provided a judicious means for the selection of the optimal internal standard in inductively coupled plasma-atomic emission spectroscopy.

  7. Transient Enhancement ('Spike-on-Tail') Observed on Neutral-Beam-Injected Energetic Ion Spectra Using the E||B Neutral Particle Analyzer in the National Spherical Torus Experiment

    Energy Technology Data Exchange (ETDEWEB)

    Medley, S. S. [Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Gorelenkov, N. N. [Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Bell, R. E. [Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Fredrickson, E. D. [Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Gerhardt, S. P. [Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); LeBlanc, B. P. [Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Podesta, M. [Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Roquemore, A. L. [Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

    2010-06-01

    An increase of up to four-fold in the E||B Neutral Particle Analyzer (NPA) charge exchange neutral flux localized at the Neutral Beam (NB) injection full energy is observed in the National Spherical Torus Experiment (NSTX). Termed the High-Energy Feature (HEF), it appears on the NB-injected energetic ion spectrum only in discharges where tearing or kink-type modes (f < 10 kHz) are absent, TAE activity (f ~ 10-150 kHz) is weak (δBrms < 75 mGauss) and CAE/GAE activity (f ~ 400 – 1200 kHz) is robust. The feature exhibits a growth time of ~ 20 - 80 ms and occasionally develops a slowing down distribution that continues to evolve over periods of 100's of milliseconds, a time scale long compared with the typical ~ 10's ms equilibration time of the NB injected particles. The HEF is observed only in H-mode (not L-mode) discharges with injected NB power of 4 MW or greater and in the field pitch range v||/v ~ 0.7 – 0.9; i.e. only for passing (never trapped) energetic ions. The HEF is suppressed by vessel conditioning using lithium deposition at rates ~ 100 mg/shot, a level sufficient to suppress ELM activity. Increases of ~ 10 - 30 % in the measured neutron yield and total stored energy are observed to coincide with the feature along with broadening of measured Te(r), Ti(r) and ne(r) profiles. However, TRANSP analysis shows that such increases are driven by plasma profile changes and not the HEF phenomenon itself. Though a definitive mechanism has yet to be developed, the HEF appears to be caused by a form of TAE/CAE wave-particle interaction that distorts of the NB fast ion distribution in phase space.

  8. Fluorescence analyzer for lignin

    Science.gov (United States)

    Berthold, John W.; Malito, Michael L.; Jeffers, Larry

    1993-01-01

    A method and apparatus for measuring lignin concentration in a sample of wood pulp or black liquor comprises a light emitting arrangement for emitting an excitation light through optical fiber bundles into a probe which has an undiluted sensing end facing the sample. The excitation light causes the lignin concentration to produce fluorescent emission light which is then conveyed through the probe to analyzing equipment which measures the intensity of the emission light. Measures a This invention was made with Government support under Contract Number DOE: DE-FC05-90CE40905 awarded by the Department of Energy (DOE). The Government has certain rights in this invention.

  9. Analyzing Chinese Financial Reporting

    Institute of Scientific and Technical Information of China (English)

    SABRINA; ZHANG

    2008-01-01

    If the world’s capital markets could use a harmonized accounting framework it would not be necessary for a comparison between two or more sets of accounting standards. However,there is much to do before this becomes reality.This article aims to pres- ent a general overview of China’s General Accepted Accounting Principles(GAAP), U.S.General Accepted Accounting Principles and International Financial Reporting Standards(IFRS),and to analyze the differ- ences among IFRS,U.S.GAAP and China GAAP using fixed assets as an example.

  10. Ring Image Analyzer

    Science.gov (United States)

    Strekalov, Dmitry V.

    2012-01-01

    Ring Image Analyzer software analyzes images to recognize elliptical patterns. It determines the ellipse parameters (axes ratio, centroid coordinate, tilt angle). The program attempts to recognize elliptical fringes (e.g., Newton Rings) on a photograph and determine their centroid position, the short-to-long-axis ratio, and the angle of rotation of the long axis relative to the horizontal direction on the photograph. These capabilities are important in interferometric imaging and control of surfaces. In particular, this program has been developed and applied for determining the rim shape of precision-machined optical whispering gallery mode resonators. The program relies on a unique image recognition algorithm aimed at recognizing elliptical shapes, but can be easily adapted to other geometric shapes. It is robust against non-elliptical details of the image and against noise. Interferometric analysis of precision-machined surfaces remains an important technological instrument in hardware development and quality analysis. This software automates and increases the accuracy of this technique. The software has been developed for the needs of an R&TD-funded project and has become an important asset for the future research proposal to NASA as well as other agencies.

  11. Field Deployable DNA analyzer

    Energy Technology Data Exchange (ETDEWEB)

    Wheeler, E; Christian, A; Marion, J; Sorensen, K; Arroyo, E; Vrankovich, G; Hara, C; Nguyen, C

    2005-02-09

    This report details the feasibility of a field deployable DNA analyzer. Steps for swabbing cells from surfaces and extracting DNA in an automatable way are presented. Since enzymatic amplification reactions are highly sensitive to environmental contamination, sample preparation is a crucial step to make an autonomous deployable instrument. We perform sample clean up and concentration in a flow through packed bed. For small initial samples, whole genome amplification is performed in the packed bed resulting in enough product for subsequent PCR amplification. In addition to DNA, which can be used to identify a subject, protein is also left behind, the analysis of which can be used to determine exposure to certain substances, such as radionuclides. Our preparative step for DNA analysis left behind the protein complement as a waste stream; we determined to learn if the proteins themselves could be analyzed in a fieldable device. We successfully developed a two-step lateral flow assay for protein analysis and demonstrate a proof of principle assay.

  12. Residual gas analyzer calibration

    Science.gov (United States)

    Lilienkamp, R. H.

    1972-01-01

    A technique which employs known gas mixtures to calibrate the residual gas analyzer (RGA) is described. The mass spectra from the RGA are recorded for each gas mixture. This mass spectra data and the mixture composition data each form a matrix. From the two matrices the calibration matrix may be computed. The matrix mathematics requires the number of calibration gas mixtures be equal to or greater than the number of gases included in the calibration. This technique was evaluated using a mathematical model of an RGA to generate the mass spectra. This model included shot noise errors in the mass spectra. Errors in the gas concentrations were also included in the valuation. The effects of these errors was studied by varying their magnitudes and comparing the resulting calibrations. Several methods of evaluating an actual calibration are presented. The effects of the number of gases in then, the composition of the calibration mixture, and the number of mixtures used are discussed.

  13. Analyzing architecture articles

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    In the present study, we express the quality, function, and characteristics of architecture to help people comprehensively understand what architecture is. We also reveal the problems and conflict found in population, land, water resources, pollution, energy, and the organization systems in construction. China’s economy is transforming. We should focus on the cities, architectural environment, energy conservation, emission-reduction, and low-carbon output that will result in successful green development. We should macroscopically and microscopically analyze the development, from the natural environment to the artificial environment; from the relationship between human beings and nature to the combination of social ecology in cities, and farmlands. We must learn to develop and control them harmoniously and scientifically to provide a foundation for the methods used in architecture research.

  14. PDA: Pooled DNA analyzer

    Directory of Open Access Journals (Sweden)

    Lin Chin-Yu

    2006-04-01

    Full Text Available Abstract Background Association mapping using abundant single nucleotide polymorphisms is a powerful tool for identifying disease susceptibility genes for complex traits and exploring possible genetic diversity. Genotyping large numbers of SNPs individually is performed routinely but is cost prohibitive for large-scale genetic studies. DNA pooling is a reliable and cost-saving alternative genotyping method. However, no software has been developed for complete pooled-DNA analyses, including data standardization, allele frequency estimation, and single/multipoint DNA pooling association tests. This motivated the development of the software, 'PDA' (Pooled DNA Analyzer, to analyze pooled DNA data. Results We develop the software, PDA, for the analysis of pooled-DNA data. PDA is originally implemented with the MATLAB® language, but it can also be executed on a Windows system without installing the MATLAB®. PDA provides estimates of the coefficient of preferential amplification and allele frequency. PDA considers an extended single-point association test, which can compare allele frequencies between two DNA pools constructed under different experimental conditions. Moreover, PDA also provides novel chromosome-wide multipoint association tests based on p-value combinations and a sliding-window concept. This new multipoint testing procedure overcomes a computational bottleneck of conventional haplotype-oriented multipoint methods in DNA pooling analyses and can handle data sets having a large pool size and/or large numbers of polymorphic markers. All of the PDA functions are illustrated in the four bona fide examples. Conclusion PDA is simple to operate and does not require that users have a strong statistical background. The software is available at http://www.ibms.sinica.edu.tw/%7Ecsjfann/first%20flow/pda.htm.

  15. Analyzing Impedance Spectroscopy Results

    Institute of Scientific and Technical Information of China (English)

    Yoed Tsur; Sioma Baltianski

    2006-01-01

    In this contribution we briefly discuss several analysis techniques for impedance spectroscopy experiments. A number of different approaches, which differ even by the definition of the problem, are used in the literature. Some aimed towards finding an equivalent circuit. Others aimed towards finding directly dielectric properties of the material under an assumed model. Others towards finding distribution of relaxation times, either parametric or point-by point. No matter what the approach is, this will always be an ill-posed problem in the sense that there exist a large number of possible solutions that solve the problem (mathematically) equally well. Therefore some a-priori knowledge about the system must be used. In addition, we should remember that the ultimate goal is to get physical insight about the system.

  16. Pseudostupidity and analyzability.

    Science.gov (United States)

    Cohn, L S

    1989-01-01

    This paper seeks to heighten awareness of pseudostupidity and the potential analyzability of patients who manifest it by defining and explicating it, reviewing the literature, and presenting in detail the psychoanalytic treatment of a pseudostupid patient. Pseudostupidity is caused by an inhibition of the integration and synthesis of thoughts resulting in a discrepancy between intellectual capacity and apparent intellect. The patient's pseudostupidity was determined in part by his need to prevent his being more successful than father, i.e., defeating his oedipal rival. Knowing and learning were instinctualized. The patient libidinally and defensively identified with father's passive, masochistic position. He needed to frustrate the analyst as he had felt excited and frustrated by his parents' nudity and thwarted by his inhibitions. He wanted to cause the analyst to feel as helpless as he, the patient, felt. Countertransference frustration was relevant and clinically useful in the analysis. Interpretation of evolving relevant issues led to more anxiety and guilt, less pseudostupidity, a heightened alliance, and eventual working through. Negative therapeutic reactions followed the resolution of pseudostupidity. PMID:2708771

  17. Downhole Fluid Analyzer Development

    Energy Technology Data Exchange (ETDEWEB)

    Bill Turner

    2006-11-28

    A novel fiber optic downhole fluid analyzer has been developed for operation in production wells. This device will allow real-time determination of the oil, gas and water fractions of fluids from different zones in a multizone or multilateral completion environment. The device uses near infrared spectroscopy and induced fluorescence measurement to unambiguously determine the oil, water and gas concentrations at all but the highest water cuts. The only downhole components of the system are the fiber optic cable and windows. All of the active components--light sources, sensors, detection electronics and software--will be located at the surface, and will be able to operate multiple downhole probes. Laboratory testing has demonstrated that the sensor can accurately determine oil, water and gas fractions with a less than 5 percent standard error. Once installed in an intelligent completion, this sensor will give the operating company timely information about the fluids arising from various zones or multilaterals in a complex completion pattern, allowing informed decisions to be made on controlling production. The research and development tasks are discussed along with a market analysis.

  18. Analyzing Spacecraft Telecommunication Systems

    Science.gov (United States)

    Kordon, Mark; Hanks, David; Gladden, Roy; Wood, Eric

    2004-01-01

    Multi-Mission Telecom Analysis Tool (MMTAT) is a C-language computer program for analyzing proposed spacecraft telecommunication systems. MMTAT utilizes parameterized input and computational models that can be run on standard desktop computers to perform fast and accurate analyses of telecommunication links. MMTAT is easy to use and can easily be integrated with other software applications and run as part of almost any computational simulation. It is distributed as either a stand-alone application program with a graphical user interface or a linkable library with a well-defined set of application programming interface (API) calls. As a stand-alone program, MMTAT provides both textual and graphical output. The graphs make it possible to understand, quickly and easily, how telecommunication performance varies with variations in input parameters. A delimited text file that can be read by any spreadsheet program is generated at the end of each run. The API in the linkable-library form of MMTAT enables the user to control simulation software and to change parameters during a simulation run. Results can be retrieved either at the end of a run or by use of a function call at any time step.

  19. 高速公路半幅封闭施工区交通特性与交通冲突特性研究%Research on Traffic Characteristics and Traffic Conflicts of One-way Closed Work Zone on Expressway

    Institute of Scientific and Technical Information of China (English)

    孟祥海; 郑来; 毕海峰; 关志强; 徐汉清

    2013-01-01

    对双向四车道高速公路半幅封闭施工区的交通特性和交通冲突特性开展研究.以交通流参数调查和交通冲突调查为基础,应用统计分析方法,研究了施工区上游过渡段车辆的排队特征,标定了描述车头时距分布的爱尔朗模型;分析了施工区各组成区段的速度分布特征,确定了基于统计分布原理的各区段限速范围;总结了施工区交通冲突的种类,给出了基于距离碰撞时间的追尾冲突严重程度判别方法,建立了基于负二项分布的追尾冲突预测模型.最后,应用VISSIM软件开展了施工区交通仿真试验.结果表明:基于车辆排队特征所确定的施工区上游过渡段合理长度应在45~70m之间;施工区各区段的限速值应根据交通量设定;在相同交通量水平下当限速值高于50km·h-1时,交通冲突数量会随着限速值提高而显著增加.%In order to analyze the traffic characteristics and traffic conflicts of one-way closed work zone on dual-way-four-lane expressway, statistical analysis was applied based on traffic investigation and conflict survey. Firstly, the queuing traits of vehicles on the upstream buffer area of the work zone were analyzed, and the Erlang distribution model which can describe the distribution of headway was calibrated. Secondly, speed distribution characteristics of all the subsections of the work zone were determined, and the speed limit scale of each subsection was proposed. Then, the types of traffic conflicts were summarized, and the determination of rear-end conflict severity degree based on time-to-collision (TTC), as well as the prediction model of rear-end conflicts based on Negative Binomial distribution, were put forward. Lastly, traffic simulations based on VISSIM were conducted. The results show that the rational length of the upstream buffer area should be between 45-70 m based on the queuing traits,the speed limits of the work zone should be determined

  20. Digital Microfluidics Sample Analyzer

    Science.gov (United States)

    Pollack, Michael G.; Srinivasan, Vijay; Eckhardt, Allen; Paik, Philip Y.; Sudarsan, Arjun; Shenderov, Alex; Hua, Zhishan; Pamula, Vamsee K.

    2010-01-01

    Three innovations address the needs of the medical world with regard to microfluidic manipulation and testing of physiological samples in ways that can benefit point-of-care needs for patients such as premature infants, for which drawing of blood for continuous tests can be life-threatening in their own right, and for expedited results. A chip with sample injection elements, reservoirs (and waste), droplet formation structures, fluidic pathways, mixing areas, and optical detection sites, was fabricated to test the various components of the microfluidic platform, both individually and in integrated fashion. The droplet control system permits a user to control droplet microactuator system functions, such as droplet operations and detector operations. Also, the programming system allows a user to develop software routines for controlling droplet microactuator system functions, such as droplet operations and detector operations. A chip is incorporated into the system with a controller, a detector, input and output devices, and software. A novel filler fluid formulation is used for the transport of droplets with high protein concentrations. Novel assemblies for detection of photons from an on-chip droplet are present, as well as novel systems for conducting various assays, such as immunoassays and PCR (polymerase chain reaction). The lab-on-a-chip (a.k.a., lab-on-a-printed-circuit board) processes physiological samples and comprises a system for automated, multi-analyte measurements using sub-microliter samples of human serum. The invention also relates to a diagnostic chip and system including the chip that performs many of the routine operations of a central labbased chemistry analyzer, integrating, for example, colorimetric assays (e.g., for proteins), chemiluminescence/fluorescence assays (e.g., for enzymes, electrolytes, and gases), and/or conductometric assays (e.g., for hematocrit on plasma and whole blood) on a single chip platform.

  1. Crew Activity Analyzer

    Science.gov (United States)

    Murray, James; Kirillov, Alexander

    2008-01-01

    The crew activity analyzer (CAA) is a system of electronic hardware and software for automatically identifying patterns of group activity among crew members working together in an office, cockpit, workshop, laboratory, or other enclosed space. The CAA synchronously records multiple streams of data from digital video cameras, wireless microphones, and position sensors, then plays back and processes the data to identify activity patterns specified by human analysts. The processing greatly reduces the amount of time that the analysts must spend in examining large amounts of data, enabling the analysts to concentrate on subsets of data that represent activities of interest. The CAA has potential for use in a variety of governmental and commercial applications, including planning for crews for future long space flights, designing facilities wherein humans must work in proximity for long times, improving crew training and measuring crew performance in military settings, human-factors and safety assessment, development of team procedures, and behavioral and ethnographic research. The data-acquisition hardware of the CAA (see figure) includes two video cameras: an overhead one aimed upward at a paraboloidal mirror on the ceiling and one mounted on a wall aimed in a downward slant toward the crew area. As many as four wireless microphones can be worn by crew members. The audio signals received from the microphones are digitized, then compressed in preparation for storage. Approximate locations of as many as four crew members are measured by use of a Cricket indoor location system. [The Cricket indoor location system includes ultrasonic/radio beacon and listener units. A Cricket beacon (in this case, worn by a crew member) simultaneously transmits a pulse of ultrasound and a radio signal that contains identifying information. Each Cricket listener unit measures the difference between the times of reception of the ultrasound and radio signals from an identified beacon

  2. One-way propagators coupled with reflection/transmission coefficients for seismogram synthesis in complex media%基于耦合反射/透射系数单程波传播算子的地震波模拟研究

    Institute of Scientific and Technical Information of China (English)

    孙伟家; 符力耘; 姚振兴

    2009-01-01

    The one-way and one-return approximation is a multiple-forescattering-single-backscattering (MFSB) approximation. Compared with the full-waveform numerical methods, one-way approximation leads to a great saving of computing time and memory, which makes it possible to modelling wave propagation in long distances. In this article, we combine both the one-return and separation-of-variables approximations to develop a new one-way propagator coupled with reflection/transmission (R/T) coefficients for seismogram synthesis in complex media. The method is derived from establishing simultaneous generalized Lippmann-Schwinger equations in two adjoining heterogeneous layers followed by the separation-of-variables and one-return approximations. The resulting one-way propagator consists of two parts: the separation-of-variables screen propagator and the R/T operators that account for amplitude variations with incident angles across interfaces. The separation-of-variables screen propagator for one-way wave propagation accounts for wide angles in large-contrast media. The R/T coefficients are the implicit function of dip angle of geology subsurface, whose calculation is coupled with one-way propagation simulation in a natural manner. We benchmark the presented method against the full-waveform boundary element (BE) method for two numerical examples and a real geology structure, which shows that the presented method simulate the reflected waves well in travel time, amplitude, and waveform for various velocity contrasts across interfaces.%单程波近似实际上是一种多次前向散射和单次后向散射近似.利用单程波近似来描述波传播可以极大地节省地震数值模拟的计算时间和内存,实现地震波长距离传播模拟和三维地震模拟快速计算.本文基于单程波近似和波动积分方程的分离变量逼近,从广义Lippmann-Schwinger波动积分方程推导出耦合反射/透射系数的单程波传播算子.该算子由两部分构

  3. Bridging a High School Science Fair Experience with First Year Undergraduate Research: Using the E-SPART Analyzer to Determine Electrostatic Charge Properties of Compositionally Varied Rock Dust Particles as Terrestrial Analogues to Mars Materials

    Science.gov (United States)

    Scott, A. G.; Williams, W. J. W.; Mazumder, M. K.; Biris, A.; Srirama, P. K.

    2005-01-01

    NASA missions to Mars confirm presence of surficial particles, as well as dramatic periods of aeolian reworking. Dust deposition on, or infiltration into, exploration equipment such as spacecraft, robotic explorers, solar panel power supplies, and even spacesuits, can pose significant problems such as diminished power collection, short circuits / discharges, and added weight. We report results conducted initially as a science fair project and a study now part of a first year University undergraduate research experience.

  4. Analyzing and modeling heterogeneous behavior

    Science.gov (United States)

    Lin, Zhiting; Wu, Xiaoqing; He, Dongyue; Zhu, Qiang; Ni, Jixiang

    2016-05-01

    Recently, it was pointed out that the non-Poisson statistics with heavy tail existed in many scenarios of human behaviors. But most of these studies claimed that power-law characterized diverse aspects of human mobility patterns. In this paper, we suggest that human behavior may not be driven by identical mechanisms and can be modeled as a Semi-Markov Modulated Process. To verify our suggestion and model, we analyzed a total of 1,619,934 records of library visitations (including undergraduate and graduate students). It is found that the distribution of visitation intervals is well fitted with three sections of lines instead of the traditional power law distribution in log-log scale. The results confirm that some human behaviors cannot be simply expressed as power law or any other simple functions. At the same time, we divided the data into groups and extracted period bursty events. Through careful analysis in different groups, we drew a conclusion that aggregate behavior might be composed of heterogeneous behaviors, and even the behaviors of the same type tended to be different in different period. The aggregate behavior is supposed to be formed by "heterogeneous groups". We performed a series of experiments. Simulation results showed that we just needed to set up two states Semi-Markov Modulated Process to construct proper representation of heterogeneous behavior.

  5. Apitherapy: usage and experience in german beekeepers.

    Science.gov (United States)

    Hellner, Markus; Winter, Daniel; von Georgi, Richard; Münstedt, Karsten

    2008-12-01

    This study aimed to investigate the practice of apitherapy - using bee products such as honey, pollen, propolis, royal jelly and bee venom to prevent or treat illness and promote healing - among German beekeepers and to evaluate their experiences with these therapies. A questionnaire incorporating two instruments on beekeepers' physical and mental health and working practice was included in three German beekeeping journals and readers were asked to complete it. The instrument included questions on the use of apitherapy. Simple descriptive methods, bivariate correlation, cross-tabulation and one-way ANOVA were used to analyze the data. Altogether 1059 completed questionnaires were received. The beekeepers reported the most effective and favorable therapeutic effects with honey, followed by propolis, pollen and royal jelly. The factors associated with successful experiences were: age, number of hives tended, health consciousness, positive experiences with one product and self-administration of treatment. Beekeepers were asked for which condition they would employ propolis and pollen. They reported that they used propolis most frequently to treat colds, wounds and burns, sore throats, gum disorders and also as a general prophylactic, while pollen was most commonly used as a general prophylactic and, less frequently, in treating prostate diseases. No adverse experiences were reported. The potential benefit of bee products is supported by the positive experiences of a large group of beekeepers who use some of these products to treat a wide range of conditions. The indications and treatments given here may be important in selecting bee products and designing future trials.

  6. A custom on-line ultrasonic gas mixture analyzer with simultaneous flowmetry developed for use in the LHC-ATLAS experiment, with wide application in high and low flow gas delivery systems

    International Nuclear Information System (INIS)

    tracker is aspirated through two instruments and analyzed. A long duration continuous study of more than a year has demonstrated a sensitivity to mixture variation of better than 5.10-5. The developed instrument has many applications where continuous knowledge of binary gas composition is required. Such applications include anaesthesia, the analysis of hydrocarbon mixtures, and vapour mixtures for semiconductor manufacture. (authors)

  7. A experiência de uma formadora de professores de Química: analisando suas ações e reflexões num curso de educação continuada The experience of a Chemistry teacher educator: analyzing their actions and reflections in a continuing education course

    Directory of Open Access Journals (Sweden)

    Maisa Helena Altarugio

    2010-01-01

    Full Text Available Objetivou-se analisar a experiência de uma formadora num curso de formação continuada para professores de Química, ocorrido numa universidade pública do estado de São Paulo, em 2004. Os dados apresentados surgiram da observação da prática da formadora e de suas reflexões, nas quais ela própria evidencia ideias, conflitos, angústias e impressões sobre suas ações durante o curso. Entre a prática da formadora e suas reflexões, surgem contrastes que irão se tornar nosso foco de investigação. Interpretamos esses contrastes como a atuação de elementos inconscientes que ora favorecem ora dificultam a sua prática e nos mostram que nem sempre a reflexão e a ação atuam na mesma direção. Defendemos uma prática reflexiva mais profunda e questionadora dos sujeitos como possibilidade para produzir melhores efeitos na formação e na atividade docente. Conceitos do referencial teórico psicanalítico de Freud e Lacan serviram de base para a análise dos dados.This paper is meant to analyze a teacher educator's experience when giving a continuing education course for chemistry teachers, held at a public university in São Paulo, in 2004. The information here has resulted from the observation of the teacher educator's performance and her reflections on their own ideas, conflicts, anguish and impressions concerning her actions throughout the course. The contrasts between the educator's practice and her reflections are the focus of this study. Such contrasts are regarded as a result of the presence of unconscious elements that either favor or hinder practice, and show that reflection and action not always lead to the same direction. We believe individuals should be encouraged to take a more questioning and more reflective attitude, enabling better results in teachers' education as well as more effective performance. Data analysis was based on concepts belonging to Freud's and Lacan's psychoanalytic theories.

  8. Analyzing Valuation Practices through Contracts

    DEFF Research Database (Denmark)

    Tesnière, Germain; Labatut, Julie; Boxenbaum, Eva

    This paper seeks to analyze the most recent changes in how societies value animals. We analyze this topic through the prism of contracts between breeding companies and farmers. Focusing on new valuation practices and qualification of breeding animals, we question the evaluation of difficult...... commensurable entities (animal, embryo, mating) and the impacts of these valuation and qualifications on government of living entities....

  9. Analyzing data files in SWAN

    CERN Document Server

    Gajam, Niharika

    2016-01-01

    Traditionally analyzing data happens via batch-processing and interactive work on the terminal. The project aims to provide another way of analyzing data files: A cloud-based approach. It aims to make it a productive and interactive environment through the combination of FCC and SWAN software.

  10. Improved virtual work method to calculate the load-carrying capacity of one-way concrete slabs subjected to large displacements%改进机动法计算大变形下混凝土单向板承载力

    Institute of Scientific and Technical Information of China (English)

    张大山; 董毓利; 吴亚平

    2012-01-01

    基于经典屈服线理论的机动法,建立虚功方程时考虑了大变形下混凝土板塑性铰线截面处的钢筋伸长做功,提出了计算大变形下混凝土单向板在均布荷载作用下极限承载力的改进机动法.为验证本方法的合理性,开展了3种边界条件的6块钢筋混凝土单向板在大变形下的静载试验,并将试验结果与计算结果进行了对比.结果表明:在大变形下混凝土单向板的破坏模式与经典屈服线理论的塑性铰线模式一致;由于受拉薄膜效应的存在,单向板挠度达到跨度的1/15时,仍能承受较大荷载;本方法计算的板极限承载力与试验结果相差不超过10%,具有较好的精度.%An improved virtual work method was proposed to calculate the ultimate load-carrying ca- pacity of one-way concrete slabs under uniformly distributed load at large displacements, and its deri- vation was based on the classical yield-line theory. The work, which caused by the extension of steel reinforcements at the sections of plastic hinge line under large displacements, was added in the meth- od. Six one-way slabs with three types of edge conditions were tested to validate the method. Then the theoretical predictions by the method were compared with experimental results. It is shown that the failure mode of the test slabs subjected to large displacement is almost identical with that assumed in the classical yield-line theory. The slabs can carry test load steadily due to the tensile membrane ac- tion, even when their displacements reach 1/15 of the span-length. The predicted load-carrying capac- ity of the method is no more than 10% error compared with the test results, and it shows good accura- cy.

  11. Detecting influenza outbreaks by analyzing Twitter messages

    CERN Document Server

    Culotta, Aron

    2010-01-01

    We analyze over 500 million Twitter messages from an eight month period and find that tracking a small number of flu-related keywords allows us to forecast future influenza rates with high accuracy, obtaining a 95% correlation with national health statistics. We then analyze the robustness of this approach to spurious keyword matches, and we propose a document classification component to filter these misleading messages. We find that this document classifier can reduce error rates by over half in simulated false alarm experiments, though more research is needed to develop methods that are robust in cases of extremely high noise.

  12. Progresses in analyzing 26Al with SMCAMS

    International Nuclear Information System (INIS)

    Shanghai Mini-Cyclotron based Accelerator Mass Spectrometer (SMCAMS) was especially designed for analyzing 14C. In order to accelerate and analyze 26Al the accelerated orbit and beam optics in injection system were calculated and harmonic number and acceleration turns was optimized. Preliminary experiment was carried out. In which a beam current of 1.15 x 10-9A for 27Al- and 0.038 CPS background for 26Al were measured. The limited sensitivity of 26Al/27Al is 5.25 x 10-12. (authors)

  13. Nuclear fuel microsphere gamma analyzer

    Science.gov (United States)

    Valentine, Kenneth H.; Long, Jr., Ernest L.; Willey, Melvin G.

    1977-01-01

    A gamma analyzer system is provided for the analysis of nuclear fuel microspheres and other radioactive particles. The system consists of an analysis turntable with means for loading, in sequence, a plurality of stations within the turntable; a gamma ray detector for determining the spectrum of a sample in one section; means for analyzing the spectrum; and a receiver turntable to collect the analyzed material in stations according to the spectrum analysis. Accordingly, particles may be sorted according to their quality; e.g., fuel particles with fractured coatings may be separated from those that are not fractured, or according to other properties.

  14. Analyzing the Biology on the System Level

    Institute of Scientific and Technical Information of China (English)

    Wei Tong

    2004-01-01

    Although various genome projects have provided us enormous static sequence information, understanding of the sophisticated biology continues to require integrating the computational modeling, system analysis, technology development for experiments, and quantitative experiments all together to analyze the biology architecture on various levels, which is just the origin of systems biology subject. This review discusses the object, its characteristics, and research attentions in systems biology, and summarizes the analysis methods, experimental technologies, research developments, and so on in the four key fields of systems biology-systemic structures, dynamics, control methods, and design principles.

  15. Historiography taking issue : Analyzing an experiment with heroin abusers

    NARCIS (Netherlands)

    Dehue, T

    2004-01-01

    This article discusses the predicament of historians becoming part of the history they are investigating and illustrates the issue in a particular case. The case is that of the randomized controlled trial (RCT)-more specifically, its use for testing the effects of providing heroin to severe heroin a

  16. Mental representation of sharing experiments: Analyzing choice and belief data

    OpenAIRE

    Güth, Werner; Klempt, Charlotte; Pull, Kerstin

    2015-01-01

    We confront allocator participants with different sharing games in a within subjects design: the Nash demand game, the ultimatum game, the yes-no-game and the impunity game. We allow participants to opt out rather than play the game under consideration. Beside choice data we also collect belief data to learn more about the mental representations of sharing games.

  17. An improved prism energy analyzer for neutrons

    Energy Technology Data Exchange (ETDEWEB)

    Schulz, J., E-mail: jennifer.schulz@helmholtz-berlin.de [Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin (Germany); Ott, F. [Laboratoire Leon Brillouin, Bât 563 CEA Saclay, 91191 Gif sur Yvette Cedex (France); Krist, Th. [Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin (Germany)

    2014-04-21

    The effects of two improvements of an existing neutron energy analyzer consisting of stacked silicon prism rows are presented. First we tested the effect of coating the back of the prism rows with an absorbing layer to suppress neutron scattering by total reflection and by refraction at small angles. Experiments at HZB showed that this works perfectly. Second the prism rows were bent to shift the transmitted wavelength band to larger wavelengths. At HZB we showed that bending increased the transmission of neutrons with a wavelength of 4.9 Å. Experiments with a white beam at the EROS reflectometer at LLB showed that bending of the energy analyzing device to a radius of 7.9 m allows to shift the transmitted wavelength band from 0 to 9 Å to 2 to 16 Å.

  18. An improved prism energy analyzer for neutrons

    International Nuclear Information System (INIS)

    The effects of two improvements of an existing neutron energy analyzer consisting of stacked silicon prism rows are presented. First we tested the effect of coating the back of the prism rows with an absorbing layer to suppress neutron scattering by total reflection and by refraction at small angles. Experiments at HZB showed that this works perfectly. Second the prism rows were bent to shift the transmitted wavelength band to larger wavelengths. At HZB we showed that bending increased the transmission of neutrons with a wavelength of 4.9 Å. Experiments with a white beam at the EROS reflectometer at LLB showed that bending of the energy analyzing device to a radius of 7.9 m allows to shift the transmitted wavelength band from 0 to 9 Å to 2 to 16 Å

  19. Experience in public goods experiments

    OpenAIRE

    Conte, Anna; Levati, M. Vittoria; Montinari, Natalia

    2014-01-01

    We use information on students' past participation in economic experiments, as stored in our database, to analyze whether behavior in public goods games is affected by experience (i.e., previous participation in social dilemma-type experiments) and history (i.e., participation in experiments of a different class than the social dilemma). We have three main results. First, at the aggregate level, the amount subjects contribute and expect others to contribute decrease with experience. Second, a...

  20. Mining Educational Data to Analyze Students' Performance

    OpenAIRE

    Brijesh Kumar Baradwaj; Saurabh Pal

    2012-01-01

    The main objective of higher education institutions is to provide quality education to its students. One way to achieve highest level of quality in higher education system is by discovering knowledge for prediction regarding enrolment of students in a particular course, alienation of traditional classroom teaching model, detection of unfair means used in online examination, detection of abnormal values in the result sheets of the students, prediction about students' performance and so on. The...

  1. Neutral Particle Analyzer Diagnostic on NSTX

    Energy Technology Data Exchange (ETDEWEB)

    S.S. Medley; A.L. Roquemore

    2004-03-16

    The Neutral Particle Analyzer (NPA) diagnostic on the National Spherical Torus Experiment (NSTX) utilizes a PPPL-designed E||B spectrometer that measures the energy spectra of minority hydrogen and bulk deuterium species simultaneously with 39 energy channels per mass specie and a time resolution of 1 ms. The calibrated energy range is E = 0.5-150 keV and the energy resolution varies from AE/E = 3-7% over the surface of the microchannel plate detector.

  2. Loviisa nuclear power plant analyzer

    International Nuclear Information System (INIS)

    The APROS Simulation Environment has been developed since 1986 by Imatran Voima Oy (IVO) and the Technical Research Centre of Finland (VTT). It provides tools, solution algorithms and process components for use in different simulation systems for design, analysis and training purposes. One of its main nuclear applications is the Loviisa Nuclear Power Plant Analyzer (LPA). The Loviisa Plant Analyzer includes all the important plant components both in the primary and in the secondary circuits. In addition, all the main control systems, the protection system and the high voltage electrical systems are included. (orig.)

  3. Analyzing the Grammar of English

    CERN Document Server

    Teschner, Richard V

    2007-01-01

    Analyzing the Grammar of English offers a descriptive analysis of the indispensable elements of English grammar. Designed to be covered in one semester, this textbook starts from scratch and takes nothing for granted beyond a reading and speaking knowledge of English. Extensively revised to function better in skills-building classes, it includes more interspersed exercises that promptly test what is taught, simplified and clarified explanations, greatly expanded and more diverse activities, and a new glossary of over 200 technical terms.Analyzing the Grammar of English is the only English gram

  4. The Convertible Arbitrage Strategy Analyzed

    NARCIS (Netherlands)

    Loncarski, I.; Ter Horst, J.R.; Veld, C.H.

    2006-01-01

    This paper analyzes convertible bond arbitrage on the Canadian market for the period 1998 to 2004.Convertible bond arbitrage is the combination of a long position in convertible bonds and a short position in the underlying stocks. Convertible arbitrage has been one of the most successful strategies

  5. Software-Design-Analyzer System

    Science.gov (United States)

    Tausworthe, Robert C.

    1991-01-01

    CRISP-90 software-design-analyzer system, update of CRISP-80, is set of computer programs constituting software tool for design and documentation of other software and supporting top-down, hierarchical, modular, structured methodologies for design and programming. Written in Microsoft QuickBasic.

  6. FORTRAN Static Source Code Analyzer

    Science.gov (United States)

    Merwarth, P.

    1984-01-01

    FORTRAN Static Source Code Analyzer program, SAP (DEC VAX version), automatically gathers statistics on occurrences of statements and structures within FORTRAN program and provides reports of those statistics. Provisions made for weighting each statistic and provide an overall figure of complexity.

  7. Methods for Analyzing Social Media

    DEFF Research Database (Denmark)

    Jensen, Jakob Linaa

    2013-01-01

    Social media is becoming increasingly attractive for users. It is a fast way to communicate ideas and a key source of information. It is therefore one of the most influential mediums of communication of our time and an important area for audience research. The growth of social media invites many...... new questions such as: How can we analyze social media? Can we use traditional audience research methods and apply them to online content? Which new research strategies have been developed? Which ethical research issues and controversies do we have to pay attention to? This book focuses on research...... strategies and methods for analyzing social media and will be of interest to researchers and practitioners using social media, as well as those wanting to keep up to date with the subject....

  8. Introduction: why analyze single cells?

    Science.gov (United States)

    Di Carlo, Dino; Tse, Henry Tat Kwong; Gossett, Daniel R

    2012-01-01

    Powerful methods in molecular biology are abundant; however, in many fields including hematology, stem cell biology, tissue engineering, and cancer biology, data from tools and assays that analyze the average signals from many cells may not yield the desired result because the cells of interest may be in the minority-their behavior masked by the majority-or because the dynamics of the populations of interest are offset in time. Accurate characterization of samples with high cellular heterogeneity may only be achieved by analyzing single cells. In this chapter, we discuss the rationale for performing analyses on individual cells in more depth, cover the fields of study in which single-cell behavior is yielding new insights into biological and clinical questions, and speculate on how single-cell analysis will be critical in the future.

  9. The Statistical Loop Analyzer (SLA)

    Science.gov (United States)

    Lindsey, W. C.

    1985-01-01

    The statistical loop analyzer (SLA) is designed to automatically measure the acquisition, tracking and frequency stability performance characteristics of symbol synchronizers, code synchronizers, carrier tracking loops, and coherent transponders. Automated phase lock and system level tests can also be made using the SLA. Standard baseband, carrier and spread spectrum modulation techniques can be accomodated. Through the SLA's phase error jitter and cycle slip measurements the acquisition and tracking thresholds of the unit under test are determined; any false phase and frequency lock events are statistically analyzed and reported in the SLA output in probabilistic terms. Automated signal drop out tests can be performed in order to trouble shoot algorithms and evaluate the reacquisition statistics of the unit under test. Cycle slip rates and cycle slip probabilities can be measured using the SLA. These measurements, combined with bit error probability measurements, are all that are needed to fully characterize the acquisition and tracking performance of a digital communication system.

  10. Satellite-based interference analyzer

    Science.gov (United States)

    Varice, H.; Johannsen, K.; Sabaroff, S.

    1977-01-01

    System identifies terrestrial sources of radiofrequency interference and measures their frequency spectra and amplitudes. Designed to protect satellite communication networks, system measures entire noise spectrum over selected frequency band and can raster-scan geographical region to locate noise sources. Once interference is analyzed, realistic interference protection ratios are determined and mathematical models for predicting ratio-frequency noise spectra are established. This enhances signal-detection and locates optimum geographical positions and frequency bands for communication equipment.

  11. Analyzing Big Data in Psychology: A Split/Analyze/Meta-Analyze Approach.

    Science.gov (United States)

    Cheung, Mike W-L; Jak, Suzanne

    2016-01-01

    Big data is a field that has traditionally been dominated by disciplines such as computer science and business, where mainly data-driven analyses have been performed. Psychology, a discipline in which a strong emphasis is placed on behavioral theories and empirical research, has the potential to contribute greatly to the big data movement. However, one challenge to psychologists-and probably the most crucial one-is that most researchers may not have the necessary programming and computational skills to analyze big data. In this study we argue that psychologists can also conduct big data research and that, rather than trying to acquire new programming and computational skills, they should focus on their strengths, such as performing psychometric analyses and testing theories using multivariate analyses to explain phenomena. We propose a split/analyze/meta-analyze approach that allows psychologists to easily analyze big data. Two real datasets are used to demonstrate the proposed procedures in R. A new research agenda related to the analysis of big data in psychology is outlined at the end of the study.

  12. Analyzing Big Data in Psychology: A Split/Analyze/Meta-Analyze Approach

    Science.gov (United States)

    Cheung, Mike W.-L.; Jak, Suzanne

    2016-01-01

    Big data is a field that has traditionally been dominated by disciplines such as computer science and business, where mainly data-driven analyses have been performed. Psychology, a discipline in which a strong emphasis is placed on behavioral theories and empirical research, has the potential to contribute greatly to the big data movement. However, one challenge to psychologists—and probably the most crucial one—is that most researchers may not have the necessary programming and computational skills to analyze big data. In this study we argue that psychologists can also conduct big data research and that, rather than trying to acquire new programming and computational skills, they should focus on their strengths, such as performing psychometric analyses and testing theories using multivariate analyses to explain phenomena. We propose a split/analyze/meta-analyze approach that allows psychologists to easily analyze big data. Two real datasets are used to demonstrate the proposed procedures in R. A new research agenda related to the analysis of big data in psychology is outlined at the end of the study. PMID:27242639

  13. Analyzing Big Data in Psychology: A Split/Analyze/Meta-Analyze Approach

    Directory of Open Access Journals (Sweden)

    Mike W.-L. Cheung

    2016-05-01

    Full Text Available Big data is a field that has traditionally been dominated by disciplines such as computer science and business, where mainly data-driven analyses have been performed. Psychology, a discipline in which a strong emphasis is placed on behavioral theories and empirical research, has the potential to contribute greatly to the big data movement. However, one challenge to psychologists – and probably the most crucial one – is that most researchers may not have the necessary programming and computational skills to analyze big data. In this study we argue that psychologists can also conduct big data research and that, rather than trying to acquire new programming and computational skills, they should focus on their strengths, such as performing psychometric analyses and testing theories using multivariate analyses to explain phenomena. We propose a split/analyze/meta-analyze approach that allows psychologists to easily analyze big data. Two real datasets are used to demonstrate the proposed procedures in R. A new research agenda related to the analysis of big data in psychology is outlined at the end of the study.

  14. Investigation and Analyzing Efficiency of Risk-adjusted Ratios in Portfolio Selection

    OpenAIRE

    Ataie Younes; Rostamzadeh Parviz

    2013-01-01

    The aim of this study is to analyze the efficiency of Risk-adjusted Ratios in portfolio selection in Tehran Stock Exchange. This study was performed on the companies that were active from 2006 until 2010. The winner and loser portfolio of 50 Top companies selected based on Risk-adjusted Ratios in Tehran Stock Exchange and then their performances were compared by the “mean difference” test “one-way Analysis of Variance” (ANOVA) and Tukey test. Results showed that there is a possibility of sele...

  15. The Aqueduct Global Flood Analyzer

    Science.gov (United States)

    Iceland, Charles

    2015-04-01

    As population growth and economic growth take place, and as climate change accelerates, many regions across the globe are finding themselves increasingly vulnerable to flooding. A recent OECD study of the exposure of the world's large port cities to coastal flooding found that 40 million people were exposed to a 1 in 100 year coastal flood event in 2005, and the total value of exposed assets was about US 3,000 billion, or 5% of global GDP. By the 2070s, those numbers were estimated to increase to 150 million people and US 35,000 billion, or roughly 9% of projected global GDP. Impoverished people in developing countries are particularly at risk because they often live in flood-prone areas and lack the resources to respond. WRI and its Dutch partners - Deltares, IVM-VU University Amsterdam, Utrecht University, and PBL Netherlands Environmental Assessment Agency - are in the initial stages of developing a robust set of river flood and coastal storm surge risk measures that show the extent of flooding under a variety of scenarios (both current and future), together with the projected human and economic impacts of these flood scenarios. These flood risk data and information will be accessible via an online, easy-to-use Aqueduct Global Flood Analyzer. We will also investigate the viability, benefits, and costs of a wide array of flood risk reduction measures that could be implemented in a variety of geographic and socio-economic settings. Together, the activities we propose have the potential for saving hundreds of thousands of lives and strengthening the resiliency and security of many millions more, especially those who are most vulnerable. Mr. Iceland will present Version 1.0 of the Aqueduct Global Flood Analyzer and provide a preview of additional elements of the Analyzer to be released in the coming years.

  16. Fuel analyzer; Analisador de combustiveis

    Energy Technology Data Exchange (ETDEWEB)

    Cozzolino, Roberval [RS Motors, Indaiatuba, SP (Brazil)

    2008-07-01

    The current technology 'COMBUSTIMETRO' aims to examine the fuel through performance of the engine, as the role of the fuel is to produce energy for the combustion engine in the form of which is directly proportional to the quality and type of fuel. The 'COMBUSTIMETRO' has an engine that always keeps the same entry of air, fuel and fixed point of ignition. His operation is monitored by sensors (Sonda Lambda, RPM and Gases Analyzer) connected to a processor that performs calculations and records the information, generate reports and graphs. (author)

  17. [Examination of the olfactory analyzer].

    Science.gov (United States)

    Domrachev, A A; Afon'kin, V Iu

    2002-01-01

    A method of threshold olfactometry is proposed consisting in the use of three olfactive substances (tincture of valerian, acetic acid, liquid ammonia) in selected concentrations. This allows to investigate the thresholds of certain modality. Each concentration of the olfactive substance is placed into a glass bottle (100 ml) and stored at the temperature 18-20 degrees C. The examination of the state of the olfactory analyzer within a 24-h working day showed stability of threshold olfactometry when the organism is tired. Utilization of threshold olfactometry in some diagnostic areas is shown. PMID:12056163

  18. A chemical analyzer for charged ultrafine particles

    Directory of Open Access Journals (Sweden)

    S. G. Gonser

    2013-04-01

    Full Text Available New particle formation is a frequent phenomenon in the atmosphere and of major significance for the earth's climate and human health. To date the mechanisms leading to the nucleation of particles as well as to aerosol growth are not completely understood. A lack of appropriate measurement equipment for online analysis of the chemical composition of freshly nucleated particles is one major limitation. We have developed a Chemical Analyzer for Charged Ultrafine Particles (CAChUP capable of analyzing particles with diameters below 30 nm. A bulk of size separated particles is collected electrostatically on a metal filament, resistively desorbed and consequently analyzed for its molecular composition in a time of flight mass spectrometer. We report of technical details as well as characterization experiments performed with the CAChUP. Our instrument was tested in the laboratory for its detection performance as well as for its collection and desorption capabilities. The manual application of known masses of camphene (C10H16 to the desorption filament resulted in a detection limit between 0.5 and 5 ng, and showed a linear response of the mass spectrometer. Flow tube experiments of 25 nm diameter secondary organic aerosol from ozonolysis of alpha-pinene also showed a linear relation between collection time and the mass spectrometer's signal intensity. The resulting mass spectra from the collection experiments are in good agreement with published work on particles generated by the ozonolysis of alpha-pinene. A sensitivity study shows that the current setup of CAChUP is ready for laboratory measurements and for the observation of new particle formation events in the field.

  19. Managing healthcare information: analyzing trust.

    Science.gov (United States)

    Söderström, Eva; Eriksson, Nomie; Åhlfeldt, Rose-Mharie

    2016-08-01

    Purpose - The purpose of this paper is to analyze two case studies with a trust matrix tool, to identify trust issues related to electronic health records. Design/methodology/approach - A qualitative research approach is applied using two case studies. The data analysis of these studies generated a problem list, which was mapped to a trust matrix. Findings - Results demonstrate flaws in current practices and point to achieving balance between organizational, person and technology trust perspectives. The analysis revealed three challenge areas, to: achieve higher trust in patient-focussed healthcare; improve communication between patients and healthcare professionals; and establish clear terminology. By taking trust into account, a more holistic perspective on healthcare can be achieved, where trust can be obtained and optimized. Research limitations/implications - A trust matrix is tested and shown to identify trust problems on different levels and relating to trusting beliefs. Future research should elaborate and more fully address issues within three identified challenge areas. Practical implications - The trust matrix's usefulness as a tool for organizations to analyze trust problems and issues is demonstrated. Originality/value - Healthcare trust issues are captured to a greater extent and from previously unchartered perspectives. PMID:27477934

  20. COBSTRAN - COMPOSITE BLADE STRUCTURAL ANALYZER

    Science.gov (United States)

    Aiello, R. A.

    1994-01-01

    The COBSTRAN (COmposite Blade STRuctural ANalyzer) program is a pre- and post-processor that facilitates the design and analysis of composite turbofan and turboprop blades, as well as composite wind turbine blades. COBSTRAN combines composite mechanics and laminate theory with a data base of fiber and matrix properties. As a preprocessor for NASTRAN or another Finite Element Method (FEM) program, COBSTRAN generates an FEM model with anisotropic homogeneous material properties. Stress output from the FEM program is provided as input to the COBSTRAN postprocessor. The postprocessor then uses the composite mechanics and laminate theory routines to calculate individual ply stresses, strains, interply stresses, thru-the-thickness stresses and failure margins. COBSTRAN is designed to carry out the many linear analyses required to efficiently model and analyze blade-like structural components made of multilayered angle-plied fiber composites. Components made from isotropic or anisotropic homogeneous materials can also be modeled as a special case of COBSTRAN. NASTRAN MAT1 or MAT2 material cards are generated according to user supplied properties. COBSTRAN is written in FORTRAN 77 and was implemented on a CRAY X-MP with a UNICOS 5.0.12 operating system. The program requires either COSMIC NASTRAN or MSC NASTRAN as a structural analysis package. COBSTRAN was developed in 1989, and has a memory requirement of 262,066 64 bit words.

  1. Analyzing Ever Growing Datasets in PHENIX

    Energy Technology Data Exchange (ETDEWEB)

    Pinkenburg, C.; PHENIX Collaboration

    2010-10-18

    After 10 years of running, the PHENIX experiment has by now accumulated more than 700 TB of reconstructed data which are directly used for analysis. Analyzing these amounts of data efficiently requires a coordinated approach. Beginning in 2005 we started to develop a system for the RHIC Atlas Computing Facility (RACF) which allows the efficient analysis of these large data sets. The Analysis Taxi is now the tool which allows any collaborator to process any data set taken since 2003 in weekly passes with turnaround times of typically three to four days.

  2. Three Practical Methods for Analyzing Slope Stability

    Institute of Scientific and Technical Information of China (English)

    XU Shiguang; ZHANG Shitao; ZHU Chuanbing; YIN Ying

    2008-01-01

    Since the environmental capacity and the arable as well as the inhabitant lands have actually reached a full balance, the slopes are becoming the more and more important options for various engineering constructions. Because of the geological complexity of the slope, the design and thedecision-making of a slope-based engineering is still not ractical to rely solely on the theoretical analysis and numerical calculation, but mainly on the experience of the experts. Therefore, it hasimportant practical significance to turn some successful experience into mathematic equations. Basedupon the abundant typical slope engineering construction cases in Yunnan, Southwestern China, 3methods for yzing the slope stability have been developed in this paper. First of all, the corresponded analogous mathematic equation for analyzing slope stability has been established through case studies. Then, artificial neural network and multivariate regression analysis have alsobeen set up when 7 main influencing factors are adopted

  3. An Investigation of the Effects of Authentic Science Experiences Among Urban High School Students

    Science.gov (United States)

    Chapman, Angela

    Providing equitable learning opportunities for all students has been a persistent issue for some time. This is evident by the science achievement gap that still exists between male and female students as well as between White and many non-White student populations (NCES, 2007, 2009, 2009b) and an underrepresentation of female, African-American, Hispanic, and Native Americans in many science, technology, engineering, and mathematics (STEM) related careers (NCES, 2009b). In addition to gender and ethnicity, socioeconomic status and linguistic differences are also factors that can marginalize students in the science classroom. One factor attributed to the achievement gap and low participation in STEM career is equitable access to resources including textbooks, laboratory equipment, qualified science teachers, and type of instruction. Extensive literature supports authentic science as one way of improving science learning. However, the majority of students do not have access to this type of resource. Additionally, extensive literature posits that culturally relevant pedagogy is one way of improving education. This study examines students' participation in an authentic science experience and argues that this is one way of providing culturally relevant pedagogy in science classrooms. The purpose of this study was to better understand how marginalized students were affected by their participation in an authentic science experience, within the context of an algae biofuel project. Accordingly, an interpretivist approach was taken. Data were collected from pre/post surveys and tests, semi-structured interviews, student journals, and classroom observations. Data analysis used a mixed methods approach. The data from this study were analyzed to better understand whether students perceived the experience to be one of authentic science, as well as how students science identities, perceptions about who can do science, attitudes toward science, and learning of science practices

  4. Thomson parabola ion energy analyzer

    Energy Technology Data Exchange (ETDEWEB)

    Cobble, James A [Los Alamos National Laboratory; Flippo, Kirk A [Los Alamos National Laboratory; Letzring, Samuel A [Los Alamos National Laboratory; Lopez, Frank E [Los Alamos National Laboratory; Offermann, Dustin T [Los Alamos National Laboratory; Oertel, John A [Los Alamos National Laboratory; Mastrosimone, Dino [UNIV OF ROCHESTER

    2010-01-01

    A new, versatile Thomson parabola ion energy (TPIE) analyzer has been designed and constructed for use at the OMEGA-EP facility. Multi-MeV ions from EP targets are transmitted through a W pinhole into a (5- or 8-kG) magnetic field and subsequently through a parallel electric field of up to 30 kV/cm. The ion drift region may have a user-selected length of 10, 50, or 80 cm. With the highest fields, 500-Me V C{sup 6+} and C{sup 5+} may be resolved. TPIE is TIM-mounted at OMEGA-EP and is qualified in all existing TIMs. The instrument runs on pressure-interlocked 15-VDC power available in EP TIM carts. It may be inserted to within several inches of the target to attain sufficient flux for a measurement. For additional flux control, the user may select a square-aperture W pinhole of 0.004-inch or 0.010-inch. The detector consists of CR-39 backed by an image plate. The fully relativistic design code and design features are discussed. Ion spectral results from first use at OMEGA-EP are expected.

  5. MESAFace, a graphical interface to analyze the MESA output

    CERN Document Server

    Giannotti, Maurizio; Mohammed, Aaron

    2012-01-01

    MESA (Modules for Experiments in Stellar Astrophysics) has become very popular among astrophysicists as a powerful and reliable code to simulate stellar evolution. Analyzing the output data thoroughly may, however, present some challenges and be rather time-consuming. Here we describe MESAFace, a graphical and dynamical interface which provides an intuitive, efficient and quick way to analyze the MESA output.

  6. MODELING STRATEGIES FOR THE ANALYSIS OF EXPERIMENTS IN AUGMENTED BLOCK DESIGN IN CLONAL TESTS OF Eucalyptus spp.

    Directory of Open Access Journals (Sweden)

    Paulo Eduardo Rodrigues Prado

    2013-08-01

    Full Text Available http://dx.doi.org/10.5902/1980509810546The objective of this work was to compare analyses of experiment strategies when there is a large number of clones and a reduced number of seedlings to be evaluated. Data from girth at breast height of two seasons of evaluation, 30 and 90 months, from a clonal test of Eucalyptus were analyzed in three locations. The experiments were carried out in the augmented block design with 400 regular clones distributed in 20 blocks and with four common clones (controls.  Each plot consisted of five plants spaced 3 x 3 meters. The individual statistic analyses were carried out by season and local, a combined one by local at each season and a combined one involving the three locals and the two seasons. Each analysis was carried out according to two models: augmented design (AD and one way classification (OWC. The variance components, the heritability, the Speaman’s rank correlation and the coincidence indexes in the clone selection at the two models were estimated. It was found that the augmented block design and the one way classification provide similar results in Eucalyptus clone evaluation. The coincidence indexes between the two models in the clone selection, in general, were high, showing values of 100% in the local combined analyses at 90 months. The Spearman’s rank

  7. Digital signal processing in the radio science stability analyzer

    Science.gov (United States)

    Greenhall, C. A.

    1995-01-01

    The Telecommunications Division has built a stability analyzer for testing Deep Space Network installations during flight radio science experiments. The low-frequency part of the analyzer operates by digitizing wave signals with bandwidths between 80 Hz and 45 kHz. Processed outputs include spectra of signal, phase, amplitude, and differential phase; time series of the same quantities; and Allan deviation of phase and differential phase. This article documents the digital signal-processing methods programmed into the analyzer.

  8. Mining Educational Data to Analyze Students' Performance

    CERN Document Server

    Baradwaj, Brijesh Kumar

    2012-01-01

    The main objective of higher education institutions is to provide quality education to its students. One way to achieve highest level of quality in higher education system is by discovering knowledge for prediction regarding enrolment of students in a particular course, alienation of traditional classroom teaching model, detection of unfair means used in online examination, detection of abnormal values in the result sheets of the students, prediction about students' performance and so on. The knowledge is hidden among the educational data set and it is extractable through data mining techniques. Present paper is designed to justify the capabilities of data mining techniques in context of higher education by offering a data mining model for higher education system in the university. In this research, the classification task is used to evaluate student's performance and as there are many approaches that are used for data classification, the decision tree method is used here. By this task we extract knowledge th...

  9. Determining the EDTA Content in a Consumer Shower Cleaner. An Introductory Chemistry Laboratory Experiment

    Science.gov (United States)

    Weigand, Willis A.

    2000-10-01

    At Altoona College, Chemistry 11 is offered to students as a preparatory course for the University's Chemical Principles course, Chem 12. A relevant laboratory is a source of motivation for the students to learn the chemistry. One way of making the laboratory relevant is to analyze the chemical components of consumer products. Several new shower-cleaning products have been introduced, which advertise that cleaning the shower is no longer necessary. The cleaners work using a combination of surfactants, alcohols, and a chelating agent. The Web site of a popular shower cleaner lists EDTA (ethylenediamine tetraacetate ion) as the chelating agent. The classic EDTA/calcium complexometric titration can be used to determine the EDTA content of the cleaner. This article describes the experiment to determine the EDTA content in a shower-cleaning product.

  10. Analyzer of energy spectra of a magnetized relativistic electron beam

    International Nuclear Information System (INIS)

    Analyzer of magnetized REB instant energy spectrum is described. The analyzer operation principle is based on the application of a sharp change of the direction of force lines of a magnetic field which is non-adiabatic for the beam electrons. The analyzer design is described, the main factors effecting the energy resolution are considered. The analyzer serviceability is examined in the course of experiments on plasma heating using a heavy-current microsecond REB at the GOL-3 device. The analyzer energy resolution which does not exceed 10% at 0.8 MeV energy and 20% at 0.3 MeV is determined. Beam energy spectra are obtained in one of the regimes of beam interaction with plasma. The efficiency of beam interaction with plasma determined using the analyzer achieves 30%. 10 refs.; 7 figs

  11. Analyzing Design Heating Loads in Superinsulated Buildings

    Energy Technology Data Exchange (ETDEWEB)

    Arena, Lois [Consortium for Advanced Residential Buildings, Norwalk, CT (United States)

    2015-06-16

    The U.S. Department of Energy’s Building America research team Consortium for Advanced Residential Buildings (CARB) worked with the EcoVillage cohousing community in Ithaca, New York, on the Third Residential EcoVillage Experience neighborhood. This communityscale project consists of 40 housing units—15 apartments and 25 single-family residences. Units range in size from 450 ft2 to 1,664 ft2 and cost from $80,000 for a studio apartment to $235,000 for a three- or four-bedroom single-family home. For the research component of this project, CARB analyzed current heating system sizing methods for superinsulated homes in cold climates to determine if changes in building load calculation methodology should be recommended. Actual heating energy use was monitored and compared to results from the Air Conditioning Contractors of America’s Manual J8 (MJ8) and the Passive House Planning Package software. Results from that research indicate that MJ8 significantly oversizes heating systems for superinsulated homes and that thermal inertia and internal gains should be considered for more accurate load calculations.

  12. Emergency response training with the BNL plant analyzer

    International Nuclear Information System (INIS)

    Presented in the experience in the use of the BNL plant analyzer for NRC emergency response training to simulated accidents in a BWR. The unique features of the BNL Plant Analyzer that are important for the emergency response training are summarized. A closed-loop simulation of all the key systems of a power plant in question was found essential to the realism of the emergency drills conducted at NRC. The faster than real-time simulation speeds afforded by the BNL Plant Analyzer have demonstrated its usefulness for the timely conduct of the emergency response training

  13. Portable Programmable Multifunction Body Fluids Analyzer Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Advanced Liquid Logic proposes to develop a very capable analyzer based on its digital microfluidic technology. Such an analyzer would be:  Capable of both...

  14. 46 CFR 154.1360 - Oxygen analyzer.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 5 2010-10-01 2010-10-01 false Oxygen analyzer. 154.1360 Section 154.1360 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) CERTAIN BULK DANGEROUS CARGOES SAFETY STANDARDS... Instrumentation § 154.1360 Oxygen analyzer. The vessel must have a portable analyzer that measures oxygen...

  15. Investigation and Analyzing Efficiency of Risk-adjusted Ratios in Portfolio Selection

    Directory of Open Access Journals (Sweden)

    Ataie Younes

    2013-02-01

    Full Text Available The aim of this study is to analyze the efficiency of Risk-adjusted Ratios in portfolio selection in Tehran Stock Exchange. This study was performed on the companies that were active from 2006 until 2010. The winner and loser portfolio of 50 Top companies selected based on Risk-adjusted Ratios in Tehran Stock Exchange and then their performances were compared by the “mean difference” test “one-way Analysis of Variance” (ANOVA and Tukey test. Results showed that there is a possibility of selecting an appropriate portfolio using of the Risk-adjusted Ratios. However M3 measure has better than the other two criteria and the market.

  16. Analyzing the Hidden Curriculum of Screen Media Advertising

    Science.gov (United States)

    Mason, Lance E.

    2015-01-01

    This media literacy article introduces a questioning framework for analyzing screen media with students and provides an example analysis of two contemporary commercials. Investigating screen conventions can help students understand the persuasive functions of commercials, as well as how the unique sensory experience of screen viewing affects how…

  17. Mental Computation Strategies for Addition: There's More than One Way to Skin a Cat

    Science.gov (United States)

    Chesney, Marlene

    2013-01-01

    Marlene Chesney describes a piece of research where the participants were asked to complete a calculation, 16 + 8, and then asked to describe how they solved it. The diversity of invented strategies will be of interest to teachers along with the recommendations that are made. So "how do 'you' solve 16 + 8?"

  18. sRNA Antitoxins: More than One Way to Repress a Toxin

    Directory of Open Access Journals (Sweden)

    Jia Wen

    2014-08-01

    Full Text Available Bacterial toxin-antitoxin loci consist of two genes: one encodes a potentially toxic protein, and the second, an antitoxin to repress its function or expression. The antitoxin can either be an RNA or a protein. For type I and type III loci, the antitoxins are RNAs; however, they have very different modes of action. Type I antitoxins repress toxin protein expression through interacting with the toxin mRNA, thereby targeting the mRNA for degradation or preventing its translation or both; type III antitoxins directly bind to the toxin protein, sequestering it. Along with these two very different modes of action for the antitoxin, there are differences in the functions of the toxin proteins and the mobility of these loci between species. Within this review, we discuss the major differences as to how the RNAs repress toxin activity, the potential consequences for utilizing different regulatory strategies, as well as the confirmed and potential biological roles for these loci across bacterial species.

  19. More than One Way to Tell a Story: Integrating Storytelling into Your Law Course

    Science.gov (United States)

    Steslow, Donna M.; Gardner, Carolyn

    2011-01-01

    Storytelling has been used in diverse educational settings. It is employed at all educational levels, from elementary schools to graduate schools. Approximately twenty years ago, law school professors began writing about the application of storytelling to various law school subjects as an alternative to the traditional case method. Legal scholars…

  20. Transgenerational cardiology: One way to a baby's heart is through the mother.

    Science.gov (United States)

    Jay, Patrick Y; Akhirome, Ehiole; Magnan, Rachel A; Zhang, M Rebecca; Kang, Lillian; Qin, Yidan; Ugwu, Nelson; Regmi, Suk Dev; Nogee, Julie M; Cheverud, James M

    2016-11-01

    Despite decades of progress, congenital heart disease remains a major cause of mortality and suffering in children and young adults. Prevention would be ideal, but formidable biological and technical hurdles face any intervention that seeks to target the main causes, genetic mutations in the embryo. Other factors, however, significantly modify the total risk in individuals who carry mutations. Investigation of these factors could lead to an alternative approach to prevention. To define the risk modifiers, our group has taken an "experimental epidemiologic" approach via inbred mouse strain crosses. The original intent was to map genes that modify an individual's risk of heart defects caused by an Nkx2-5 mutation. During the analysis of >2000 Nkx2-5(+/-) offspring from one cross we serendipitously discovered a maternal-age associated risk, which also exists in humans. Reciprocal ovarian transplants between young and old mothers indicate that the incidence of heart defects correlates with the age of the mother and not the oocyte, which implicates a maternal pathway as the basis of the risk. The quantitative risk varies between strain backgrounds, so maternal genetic polymorphisms determine the activity of a factor or factors in the pathway. Most strikingly, voluntary exercise by the mother mitigates the risk. Therefore, congenital heart disease can in principle be prevented by targeting a maternal pathway even if the embryo carries a causative mutation. Further mechanistic insight is necessary to develop an intervention that could be implemented on a broad scale, but the physiology of maternal-fetal interactions, aging, and exercise are notoriously complex and undefined. This suggests that an unbiased genetic approach would most efficiently lead to the relevant pathway. A genetic foundation would lay the groundwork for human studies and clinical trials. PMID:27555292

  1. A Modest Proposal: One Way to Save Journalism and Journalism Education

    Science.gov (United States)

    John, Jeffrey Alan

    2013-01-01

    This essay suggests that because anyone and everyone can now be a "journalist," the standards of the field of journalism have been greatly diminished. To regain respect for the profession and retain stature in the academy, journalism education should offer an assurance of the legitimacy of journalism program graduates by recognizing only…

  2. More than one way to be happy: a typology of marital happiness.

    Science.gov (United States)

    Rauer, Amy; Volling, Brenda

    2013-09-01

    This study utilized observational and self-report data from 57 happily married couples to explore assumptions regarding marital happiness. Suggesting that happily married couples are not a homogeneous group, cluster analyses revealed the existence of three types of couples based on their observed behaviors in a problem-solving task: (1) mutually engaged couples (characterized by both spouses' higher negative and positive problem-solving); (2) mutually supportive couples (characterized by both spouses' higher positivity and support); and (3) wife compensation couples (characterized by high wife positivity). Although couples in all three clusters were equally happy with and committed to their marriages, these clusters were differentially associated with spouses' evaluations of their marriage. Spouses in the mutually supportive cluster reported greater intimacy and maintenance and less conflict and ambivalence, although this was more consistently the case in comparison to the wife compensation cluster, as opposed to the mutually engaged cluster. The implications of these typologies are discussed as they pertain to efforts on the part of both practitioners to promote marital happiness and repair marital relations when couples are faced with difficulties.

  3. Student Modeling of Physical Phenomena as They Derive Integral Formulae: One Way To Reduce Proof Phobia.

    Science.gov (United States)

    Dancis, Jerome

    2001-01-01

    Students in a freshmen calculus course should become fluent in modeling physical phenomena represented by integrals, in particular geometric formulas for volumes and arc length and physical formulas for work. Describes how to train students to became fluent in such modeling and derivation of standard integral formulas. Indicates that these lessons…

  4. Using one-way communications in a market-based resource allocation system

    Science.gov (United States)

    Chassin, David P.; Pratt, Robert G.

    2014-07-22

    Disclosed herein are representative embodiments of methods, apparatus, and systems for distributing a resource (such as electricity) using a resource allocation system. In one exemplary embodiment, a plurality of requests for electricity are received from a plurality of end-use consumers. The requests indicate a requested quantity of electricity and a consumer-requested index value indicative of a maximum price a respective end-use consumer will pay for the requested quantity of electricity. A plurality of offers for supplying electricity are received from a plurality of resource suppliers. The offers indicate an offered quantity of electricity and a supplier-requested index value indicative of a minimum price for which a respective supplier will produce the offered quantity of electricity. A dispatched index value is computed at which electricity is to be supplied based at least in part on the consumer-requested index values and the supplier-requested index values.

  5. Teaching One Way and Testing Another: An Interview with Scott Howell

    Science.gov (United States)

    Morrison, James L.; Howell, Scott

    2007-01-01

    Editor-in-Chief James L. Morrison interviews Scott Howell, the co-editor of a three-volume book series entitled "Online Assessment and Measurement" that was published in 2006 by IDEA Group. In discussing his own research, Howell first highlights the value of test blueprints as a valuable tool for ensuring an effective alignment of assessment…

  6. One Way to Rein in the Cost of Textbooks: Make Them Free

    Science.gov (United States)

    Delespinasse, Paul F.

    2008-01-01

    The prices for college texts have soared way beyond inflation for the last quarter-century. As such, they have become a burden on today's financially strapped students. From the point of students and of faculty members who are concerned about their students' welfare, the important question is what can be done to drive text prices back down. In…

  7. A novel method for one-way hash function construction based on spatiotemporal chaos

    Energy Technology Data Exchange (ETDEWEB)

    Ren Haijun [College of Software Engineering, Chongqing University, Chongqing 400044 (China); State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing 400044 (China)], E-mail: jhren@cqu.edu.cn; Wang Yong; Xie Qing [Key Laboratory of Electronic Commerce and Logistics of Chongqing, Chongqing University of Posts and Telecommunications, Chongqing 400065 (China); Yang Huaqian [Department of Computer and Modern Education Technology, Chongqing Education of College, Chongqing 400067 (China)

    2009-11-30

    A novel hash algorithm based on a spatiotemporal chaos is proposed. The original message is first padded with zeros if needed. Then it is divided into a number of blocks each contains 32 bytes. In the hashing process, each block is partitioned into eight 32-bit values and input into the spatiotemporal chaotic system. Then, after iterating the system for four times, the next block is processed by the same way. To enhance the confusion and diffusion effect, the cipher block chaining (CBC) mode is adopted in the algorithm. The hash value is obtained from the final state value of the spatiotemporal chaotic system. Theoretic analyses and numerical simulations both show that the proposed hash algorithm possesses good statistical properties, strong collision resistance and high efficiency, as required by practical keyed hash functions.

  8. More than one way to invade: lessons from genetic studies of Carcinus shore crabs

    Science.gov (United States)

    The European green crab Carcinus maenas is one of the world's most widely recognized marine invaders. The success of this species has provided opportunities to explore genetic patterns associated with establishment and population expansion following independent introduction event...

  9. Crafting zero-bias one-way transport of charge and spin

    Science.gov (United States)

    Foa Torres, L. E. F.; Dal Lago, V.; Suárez Morell, E.

    2016-02-01

    We explore the electronic structure and transport properties of a metal on top of a (weakly coupled) two-dimensional topological insulator. Unlike the widely studied junctions between topological nontrivial materials, the systems studied here allow for a unique band structure and transport steering. First, states on the topological insulator layer may coexist with the gapless bulk and, second, the edge states on one edge can be selectively switched off, thereby leading to nearly perfect directional transport of charge and spin even in the zero bias limit. We illustrate these phenomena for Bernal stacked bilayer graphene with Haldane or intrinsic spin-orbit terms and a perpendicular bias voltage. This opens a path for realizing directed transport in materials such as van der Waals heterostructures, monolayer, and ultrathin topological insulators.

  10. One-way data transfer for PLC to VME status reporting at the Advanced Photon Source

    Science.gov (United States)

    Stein, S. J.

    1994-12-01

    The Personnel Safety System for the experimental beamlines at the Advanced Photon Source will use a large number of Allen Bradley Programmable Logic Controllers (PLC) to replace conventional relay logic. PLCs allow for the design of a very advanced safety system that can handle a large number of I/O points. Certain situations require monitoring of the safety system from various locations around the storage ring via the EPICS OPI (operator interface) consoles. This presentation covers the chosen method for transferring data from the Personnel Safety System into an EPICS database. Specifications on PLC ladder design, EPICS database design and hardware selection are also discussed.

  11. Alternatives to incineration: There's more than one way to remediate

    Energy Technology Data Exchange (ETDEWEB)

    Pellerin, C.

    1994-10-01

    Hazardous waste is everywhere. It comes from paints, motor oil, hair spray, household cleaners, automotive chemicals, and all kinds of toxic medical, industrial and military products. Most industrial processes - from which come cosmetics and pharmaceuticals, computers and garden pesticides - generate wastes that the EPA, acting under the Resource Conservation Recovery Act (RCRA), says can harm human health or the environment if not properly managed. As a waste-disposal technology, incineration has been around for about 500,000 years - an interesting spinoff of that timely Homo erectus discovery, fire. For millennia, incineration looked like a pretty good way to turn big piles of hazardous waste into air emissions, smaller piles of ash, and sometimes energy. And it's still a good idea. The EPA, for one, calls high-temperature incineration the best available technology for disposing of most hazardous waste. But incineration has drawbacks. When hazardous waste goes into an incinerator, it comes out as potentially harmful air emissions, although these emissions are strictly controlled, and ash ash that's treated to meet EPA standards and then disposed of in an authorized landfill. It doesn't just vanish into thin air.

  12. Evaluating the one-way coupling of WRF-Hydro for flood forecasting

    Science.gov (United States)

    Yucel, Ismail; Onen, Alper; Yilmaz, Koray; Gochis, David

    2016-04-01

    A fully-distributed, multi-physics, multi-scale hydrologic and hydraulic modeling system, WRF-Hydro, is used to assess the potential for skillful flood forecasting based on precipitation inputs derived from the Weather Research and Forecasting (WRF) model and the EUMETSAT Multi-sensor Precipitation Estimates (MPEs). Similar to past studies it was found that WRF model precipitation forecast errors related to model initial conditions are reduced when the three dimensional atmospheric data assimilation (3DVAR) scheme in the WRF model simulations is used. A comparative evaluation of the impact of MPE versus WRF precipitation estimates, both with and without data assimilation, in driving WRF-Hydro simulated streamflow is then made. The ten rainfall-runoff events that occurred in the Black Sea Region were used for testing and evaluation. With the availability of streamflow data across rainfall-runoff events, the cal- ibration is only performed on the Bartin sub-basin using two events and the calibrated parameters are then transferred to other neighboring three ungauged sub-basins in the study area. The rest of the events from all sub-basins are then used to evaluate the performance of the WRF-Hydro system with the cali- brated parameters. Following model calibration, the WRF-Hydro system was capable of skillfully repro- ducing observed flood hydrographs in terms of the volume of the runoff produced and the overall shape of the hydrograph. Streamflow simulation skill was significantly improved for those WRF model simula- tions where storm precipitation was accurately depicted with respect to timing, location and amount. Accurate streamflow simulations were more evident in WRF model simulations where the 3DVAR scheme was used compared to when it was not used. Because of substantial dry bias feature of MPE, as compared with surface rain gauges, streamflow derived using this precipitation product is in general very poor. Overall, root mean squared errors for runoff were reduced by 22.2% when hydrological model calibration is performed with WRF precipitation. Errors were reduced by 36.9% (above uncalibrated model performance) when both WRF model data assimilation and hydrological model calibration was utilized. Our results also indicated that when assimilated precipitation and model calibration is per- formed jointly, the calibrated parameters at the gauged sites could be transferred to ungauged neighbor- ing basins where WRF-Hydro reduced mean root mean squared error from 8.31 m3/s to 6.51 m3/s.

  13. Video conferencing - Electronic travel TCTS one way point to multipoint service

    Science.gov (United States)

    Kirouac, J.; Bullock, D. N.

    The ad hoc video conferencing (AHVC) service provided by the TCTS (TransCanada Telephone System) is examined with attention given to network planning, the satellite, and audio requirements. It is noted that AHVC is an ideal service for corporations desiring to try video conferencing without risks. The transmission network is a complex assembly of mixed technologies at various locations and has to be custom-designed and tailored to every individual need. It is concluded that satellite-based AHVC is a growing communications service which provides users with opportunities for better and faster communications as well as for time and money savings.

  14. One Way Multimedia Broadcasting as a Tool for Education and Development in Developing Nations

    Science.gov (United States)

    Chandrasekhar, M. G.; Venugopal, D.; Sebastian, M.; Chari, B.

    2000-07-01

    An improved quality of life through education and developmental communication is an important necessity of societal up-liftment in the new millennium, especially in the developing nations. The population explosion and the associated pressure on the scarce resources to meet the basic necessities have made it more or less impossible for most of the nations to invest reasonable resources in realizing adequate channels of formal education. Thanks to the developments in satellite communication and associated technologies, new vistas are available today to provide education and developmental communication opportunities to millions of people, spread across the globe. Satellite based Digital Audio and Multimedia Broadcasting is one such new development that is being viewed as an innovative space application in the coming decades. The potential of DAB technology to reach education, information and entertainment directly to the user through a specially designed receiver could be efficiently utilized by the developing nations to overcome their difficulties in realizing formal channels of education and information dissemination. WorldSpace plans to launch three geo-stationary satellites that would cover most of the developing economies in Africa, the Mediterranean, the Middle East, Asia, Latin America and the Caribbean. Apart from a variety of digital, high quality audio channels providing news, views, education and entertainment opportunities, the end users can also get a responsive multimedia. The multimedia is being planned as a specially packaged offering that can meet the demand of students, professionals as well as certain special groups who have certain specific data and information requirements. Apart from WorldSpace, renowned agencies/firms from different parts of the world shall provide the required content to meet these requirements. Though the Internet option is available, higher telephone charges and the difficulty in getting access have made this option less interesting and unpopular in most of the developing countries. The proposed digital audio and multimedia offering from WorldSpace to millions of consumers spread across more than 120 countries is considered as a unique tool for education and development, particularly in the developing nations. In this paper, an attempt is made to briefly describe the issues associated with education and development in developing countries, the WorldSpace offering and how a developing nation can benefit from this offering in the coming decades.

  15. INPUT,INTAKE,AND OUTPUT IN ONE-WAY DRAWING TASK

    Institute of Scientific and Technical Information of China (English)

    Lin; Yan

    1999-01-01

    It is agreed that input plays a critical role in language acquisition.Without input the learner hasnothing.But the question is what kind,form and amount of input is most useful for language learners.Krashen(1980)has argued that the input given to the learners has to be comprehensible for acquisition tohappen.He defined it as input which is slightly beyond the learner’s current knowledge level(in his termI+1).Swain(1985)explained that comprehensible input means that"language directed to the learnersthat contains some new element in it but this is nevertheless understood by the learner because of linguis-tic,paralinguistie,or situational cues,or world knowledge backup."(p.245).She further argued that

  16. 47 CFR 90.490 - One-way paging operations in the private services.

    Science.gov (United States)

    2010-10-01

    ... directly from telephone positions in the public switched telephone network. When land stations are multiple licensed or otherwise shared by authorized users, arrangements for the telephone service must be made with...-shared basis. When telephone service costs are shared, at least one licensee participating in the...

  17. Beyond one-way streets:the interaction of phonology, morphology, and culture with orthography

    OpenAIRE

    Beveridge, Madeleine E. L.; Bak, Thomas H.

    2012-01-01

    Frost's claim that universal models of reading require linguistically diverse data is relevant and justified. We support it with evidence demonstrating the extent of the bias towards some Indo-European languages and alphabetic scripts in scientific literature. However, some of his examples are incorrect, and he neglects the complex interaction of writing system and language structure with history and cultural environment.

  18. GROUP PRESENTATION AS ONE WAY OF INCREASING STUDENTS PARTICIPATION IN THE CLASSROOM

    Directory of Open Access Journals (Sweden)

    Clara Herlina Karjo

    2008-10-01

    Full Text Available Teaching English (TOEFL to a class of 50 students or more is a difficult task for a lecturer. Some problems will occur, for example, the improbability for all students to get equal teachers attention and equal chance for learning and studying in class. To overcome these problems, the writer conducts a quasi-experimental research involving 100 students in her two classes in Bina Nusantara University. In this research, the writer applies the group presentation method for teaching TOEFL for one semester. The research shows that group scores are slightly higher than individual students scores.

  19. GROUP PRESENTATION AS ONE WAY OF INCREASING STUDENTS’ PARTICIPATION IN THE CLASSROOM

    Directory of Open Access Journals (Sweden)

    Clara Herlina Karjo

    2008-11-01

    Full Text Available Teaching English (TOEFL to a class of 50 students or more is a difficult task for a lecturer. Some problems will occur, for example, the improbability for all students to get equal teacher’s attention and equal chance for learning and studying in class. To overcome these problems, the writer conducts a quasi-experimental research involving 100 students in her two classes in Bina Nusantara University. In this research, the writer applies the group presentation method for teaching TOEFL for one semester. The research shows that group scores are slightly higher than individual students’ scores.Keywords:

  20. Electrical spectrum & network analyzers a practical approach

    CERN Document Server

    Helfrick, Albert D

    1991-01-01

    This book presents fundamentals and the latest techniques of electrical spectrum analysis. It focuses on instruments and techniques used on spectrum and network analysis, rather than theory. The book covers the use of spectrum analyzers, tracking generators, and network analyzers. Filled with practical examples, the book presents techniques that are widely used in signal processing and communications applications, yet are difficult to find in most literature.Key Features* Presents numerous practical examples, including actual spectrum analyzer circuits* Instruction on how to us

  1. ADAM: Analyzer for Dialectal Arabic Morphology

    Directory of Open Access Journals (Sweden)

    Wael Salloum

    2014-12-01

    Full Text Available While Modern Standard Arabic (MSA has many resources, Arabic Dialects, the primarily spoken local varieties of Arabic, are quite impoverished in this regard. In this article, we present ADAM (Analyzer for Dialectal Arabic Morphology. ADAM is a poor man’s solution to quickly develop morphological analyzers for dialectal Arabic. ADAM has roughly half the out-of-vocabulary rate of a state-of-the-art MSA analyzer and is comparable in its recall performance to an Egyptian dialectal morphological analyzer that took years and expensive resources to build.

  2. Designing of Acousto-optic Spectrum Analyzer

    Institute of Scientific and Technical Information of China (English)

    WANG Dan-zhi; SHAO Ding-rong; LI Shu-jian

    2004-01-01

    The structure of the acousto-optic spectrum analyzer was investigated including the RF amplifying circuit, the optical structures and the postprocessing circuit, and the design idea of the module was applied to design the spectrum analyzer. The modularization spectrum analyzer takes on the performance stabilization and higher reliability, and according to different demands, the different modules can be used. The spectrum analyzer had such performances as the detecting frequency error of 0.58MHz,detecting responsivity of 90 dBm and bandwidth of 50 Mhz.

  3. Retail Experience Marketing : A study on customer perceptions of successful in-store experience marketing within retailing

    OpenAIRE

    Tengström, Michaela; Björkman, Hanna; Egardsson, Patricia

    2015-01-01

    It has been shown that in today’s society, businesses will need to consider not only selling products or services, but also experiences in order to fulfil customers’ increasing demand for more stimuli in purchase situations. Additionally, brick and mortar retailers will need to respond to the increased use of online sales channels through finding ways of attracting customers to their stores. One way of responding to both trends can be to practise Experience Marketing and thereby offer holisti...

  4. Performance evaluation of PL-11 platelet analyzer

    Institute of Scientific and Technical Information of China (English)

    张有涛

    2013-01-01

    Objective To evaluate and report the performance of PL-11 platelet analyzer. Methods Intravenous blood sam-ples anticoagulated with EDTA-K2 and sodium citrate were tested by the PL-11 platelet analyzer to evaluate the intra-assay and interassay coefficient of variation(CV),

  5. Testing user experience in tablet game graphics

    OpenAIRE

    Härkönen, Heli

    2015-01-01

    As playing games has grown more popular than ever and the market is oversupplied by different games, it has become increasingly important to stand out in the competition. One way for game companies to do this is to concentrate on offering the players great usability and user experience. The purpose of the thesis is to find out how game graphic artists can enhance the user experience in games and increase the playability with their graphics. One of the fastest growing fields of games is m...

  6. Model and experiment of external moisture transfer of Dutch cucumber%荷兰黄瓜外部水分迁移模型及实验研究

    Institute of Scientific and Technical Information of China (English)

    张婷玉; 陶乐仁; 蔡梅艳; 范国华

    2013-01-01

    综合单向扩散、双膜理论以及有效膜模型等原理,提出了荷兰黄瓜在贮藏前期的外部水分迁移传质模型——类单向扩散过程,通过实验导出了荷兰黄瓜在恒温恒湿条件下水分迁移时的有效膜厚度△x,避免了理论分析过程中存在的有效膜厚度难以确定等问题,为预测果蔬前期水分损失提供了一个新的思路.%Based on one-way diffusion,double membrane theory and effective membrane model,the external moisture transfer models of Dutch cucumber in the beginning of storage was built, which was called analogous diffusion in one -way direction. Then the effective film thickness was derived through experiment on water evaporation strength of Dutch cucumber under the condition of constant temperature and humidity, which avoided problem that it was difficult to determine thickness of effective film during analyzing its moisture transfer process,and provided a new thought for forecasting the water loss of fruits and vegetables in the beginning of storage.

  7. Design and analysis of experiments classical and regression approaches with SAS

    CERN Document Server

    Onyiah, Leonard C

    2008-01-01

    Introductory Statistical Inference and Regression Analysis Elementary Statistical Inference Regression Analysis Experiments, the Completely Randomized Design (CRD)-Classical and Regression Approaches Experiments Experiments to Compare Treatments Some Basic Ideas Requirements of a Good Experiment One-Way Experimental Layout or the CRD: Design and Analysis Analysis of Experimental Data (Fixed Effects Model) Expected Values for the Sums of Squares The Analysis of Variance (ANOVA) Table Follow-Up Analysis to Check fo

  8. The effects of progressive levels of 3d authenticity antecedents and consequences on consumers’ virtual experience

    OpenAIRE

    Algharabat, R; Dennis, C.

    2009-01-01

    This study investigates the effects of authentic three dimensional (3D) product visualisation antecedents on 3D authenticity, and the effects of 3D authenticity consequences on consumers’ virtual experience. A hypothetical retailer Web site presents a variety of laptops for the within-subjects laboratory experiments. In a first experiment, a one-way ANOVA compares telepresence and authenticity scores. The second experiment uses two-way repeated measures ANOVA to determine the effects of the p...

  9. Systems Analyze Water Quality in Real Time

    Science.gov (United States)

    2010-01-01

    A water analyzer developed under Small Business Innovation Research (SBIR) contracts with Kennedy Space Center now monitors treatment processes at water and wastewater facilities around the world. Originally designed to provide real-time detection of nutrient levels in hydroponic solutions for growing plants in space, the ChemScan analyzer, produced by ASA Analytics Inc., of Waukesha, Wisconsin, utilizes spectrometry and chemometric algorithms to automatically analyze multiple parameters in the water treatment process with little need for maintenance, calibration, or operator intervention. The company has experienced a compound annual growth rate of 40 percent over its 15-year history as a direct result of the technology's success.

  10. Analyzing Oscillations of a Rolling Cart Using Smartphones and Tablets

    Science.gov (United States)

    Egri, Sándor; Szabó, Lóránt

    2015-03-01

    It is well known that "interactive engagement" helps students to understand basic concepts in physics.1 Performing experiments and analyzing measured data are effective ways to realize interactive engagement, in our view. Some experiments need special equipment, measuring instruments, or laboratories, but in this activity we advocate student use of mobile phones or tablets to take experimental data. Applying their own devices and measuring simple phenomena from everyday life can improve student interest, while still allowing precise analysis of data, which can give deeper insight into scientific thinking and provide a good opportunity for inquiry-based learning.2

  11. Low Gravity Drug Stability Analyzer Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The overall goal of this proposed program (through Phase III) is to build a space-worthy Drug Stability Analyzer that can determine the extent of drug degradation....

  12. On-Demand Urine Analyzer Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The overall goal of this program (through Phase III) is to develop an analyzer that can be integrated into International Space Station (ISS) toilets to measure key...

  13. Ultrasensitive Atmospheric Analyzer for Miniature UAVs Project

    Data.gov (United States)

    National Aeronautics and Space Administration — In this SBIR Phase I effort, Los Gatos Research (LGR) proposes to develop a highly-accurate, lightweight, low-power gas analyzer for quantification of water vapor...

  14. Low Gravity Drug Stability Analyzer Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The goal of this proposed program through Phase III is to build a space-worthy Drug Stability Analyzer that can determine the extent of drug degradation. It will be...

  15. Analyzing IS User Requirements using Organizational Semiotics

    Directory of Open Access Journals (Sweden)

    Kamyar Raissifar

    2014-09-01

    Full Text Available In recent years, lack of appropriate understanding of IS user requirements, has been one of the most important causes of IS development failure. Therefore, many methods were introduced for better analyzing user requirements; some of them were philosophically different. Organizational semiotics (OS is one of these methods, which with phenomenological and action-oriented view, tries to get better system requirement analysis. In this research, first, organizational semiotics and SSADM was compared, with focus on their ability to elicit and analyze IS user requirements, and then, OS was applied in analyzing an IS requirement analysis case. Research findings show that OS in many dimensions is superior to SSADM; although SSADM has superiority in few dimensions too. Therefore using OS can help analyzing IS user requirements more appropriately.

  16. Analyzing Log Files using Data-Mining

    OpenAIRE

    Marius Mihut

    2008-01-01

    Information systems (i.e. servers, applications and communication devices) create a large amount of monitoring data that are saved as log files. For analyzing them, a data-mining approach is helpful. This article presents the steps which are necessary for creating an ‘analyzing instrument’, based on an open source software called Waikato Environment for Knowledge Analysis (Weka) [1]. For exemplification, a system log file created by a Windows-based operating system, is used as input file.

  17. Network analysis using organizational risk analyzer

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    The tool system of the organizational risk analyzer (ORA) to study the network of East Turkistan terrorists is selected. The model of the relationships among its personnel, knowledge, resources and task entities is represented by the meta-matrix in ORA, with which to analyze the risks and vulnerabilities of organizational structure quantitatively, and obtain the last vulnerabilities and risks of the organization. Case study in this system shows that it should be a shortcut to destroy effectively the network...

  18. The Information Flow Analyzing Based on CPC

    Institute of Scientific and Technical Information of China (English)

    ZHANG Zhang; LI Hui

    2005-01-01

    The information flow chart within product life cycle is given out based on collaborative production commerce (CPC) thoughts. In this chart, the separated information systems are integrated by means of enterprise knowledge assets that are promoted by CPC from production knowledge. The information flow in R&D process is analyzed in the environment of virtual R&D group and distributed PDM. In addition, the information flow throughout the manufacturing and marketing process is analyzed in CPC environment.

  19. QUBIT DATA STRUCTURES FOR ANALYZING COMPUTING SYSTEMS

    Directory of Open Access Journals (Sweden)

    Vladimir Hahanov

    2014-11-01

    Full Text Available Qubit models and methods for improving the performance of software and hardware for analyzing digital devices through increasing the dimension of the data structures and memory are proposed. The basic concepts, terminology and definitions necessary for the implementation of quantum computing when analyzing virtual computers are introduced. The investigation results concerning design and modeling computer systems in a cyberspace based on the use of two-component structure are presented.

  20. Magnetic systems for wide-aperture neutron polarizers and analyzers

    Science.gov (United States)

    Gilev, A. G.; Pleshanov, N. K.; Bazarov, B. A.; Bulkin, A. P.; Schebetov, A. F.; Syromyatnikov, V. G.; Tarnavich, V. V.; Ulyanov, V. A.

    2016-10-01

    Requirements on the field uniformity in neutron polarizers are analyzed in view of the fact that neutron polarizing coatings have been improved during the past decade. The design of magnetic systems that meet new requirements is optimized by numerical simulations. Magnetic systems for wide-aperture multichannel polarizers and analyzers are represented, including (a) the polarizer to be built at channel 4-4‧ of the reactor PIK (Gatchina, Russia) for high-flux experiments with a 100×150 mm2 beam of polarized cold neutrons; (b) the fan analyzer covering a 150×100 mm2 window of the detector at the Magnetism Reflectometer (SNS, ORNL, USA); (c) the polarizer and (d) the fan analyzer covering a 220×110 mm2 window of the detector at the reflectometer NERO, which is transferred to PNPI (Russia) from HZG (Germany). Deviations of the field from the vertical did not exceed 2°. The polarizing efficiency of the analyzer at the Magnetism Reflectometer reached 99%, a record level for wide-aperture supermirror analyzers.

  1. Analyzing shotgun proteomic data with PatternLab for proteomics

    OpenAIRE

    Carvalho, Paulo C; Yates, John R.; Barbosa, Valmir C

    2010-01-01

    PatternLab for proteomics is a one-stop-shop computational environment for analyzing shotgun proteomic data. Its modules provide means to pinpoint proteins / peptides that are differentially expressed, those that are unique to a state, and can also cluster the ones that share similar expression profiles in time-course experiments as well as help in interpreting results according to Gene Ontology. PatternLab is user-friendly, simple, and provides a graphical user interface.

  2. Analyzing Log Files using Data-Mining

    Directory of Open Access Journals (Sweden)

    Marius Mihut

    2008-01-01

    Full Text Available Information systems (i.e. servers, applications and communication devices create a large amount of monitoring data that are saved as log files. For analyzing them, a data-mining approach is helpful. This article presents the steps which are necessary for creating an ‘analyzing instrument’, based on an open source software called Waikato Environment for Knowledge Analysis (Weka [1]. For exemplification, a system log file created by a Windows-based operating system, is used as input file.

  3. Analyzing the Information Economy: Tools and Techniques.

    Science.gov (United States)

    Robinson, Sherman

    1986-01-01

    Examines methodologies underlying studies which measure the information economy and considers their applicability and limitations for analyzing policy issues concerning libraries and library networks. Two studies provide major focus for discussion: Porat's "The Information Economy: Definition and Measurement" and Machlup's "Production and…

  4. 40 CFR 92.109 - Analyzer specifications.

    Science.gov (United States)

    2010-07-01

    ... comparable results to an HFID not using this procedure. These data must be submitted to the Administrator for... consistent with the general requirements of 40 CFR part 1065, subpart I, for sampling and analysis of... NO2 to NO converter. (ii) For high vacuum CL analyzers with heated capillary modules, supplying...

  5. Portable peltier-cooled X RF analyzer

    International Nuclear Information System (INIS)

    Full text: Recent development of semiconductor detectors has made it possible to design portable battery operated XRF-analyzers. Energy resolution and good peak to background ratio are close to liquid nitrogen cooled detector values. Application examples are given and a comparison of the new device between old ones is made. (author)

  6. 40 CFR 90.313 - Analyzers required.

    Science.gov (United States)

    2010-07-01

    ... ionization (HFID) type. For constant volume sampling, the hydrocarbon analyzer may be of the flame ionization (FID) type or of the heated flame ionization (HFID) type. (ii) For the HFID system, if the temperature... drying. Chemical dryers are not an acceptable method of removing water from the sample. Water removal...

  7. Analyzing Vessel Behavior Using Process Mining

    NARCIS (Netherlands)

    Maggi, F.M.; Mooij, A.J.; Aalst, W.M.P. van der

    2013-01-01

    In the maritime domain, electronic sensors such as AIS receivers and radars collect large amounts of data about the vessels in a certain geographical area. We investigate the use of process mining techniques for analyzing the behavior of the vessels based on these data. In the context of maritime sa

  8. Miniature retarding grid ion energy analyzer

    Energy Technology Data Exchange (ETDEWEB)

    Gibson, G.W.; Sawin, H.H.

    1992-12-01

    A retarding grid analyzer intended for use as a high-density ({approximately}10{sup 12}/cc) plasma diagnostic has been designed, built and tested. The analyzer`s external dimensions are 0.125 inch x0.125 inch x0.050 inch which are smaller than macroscopic plasma scale lengths, thus allowing it to be stalk mounted and moved throughout the plasma. The grids are 2000 line/inch nickel mesh so that the linear dimension of grid open area is less than the debye length for plasmas with 10 eV electrons and 10{sup 12}/cc densities. Successive grids are separated by 0.01 inch in order to avoid space charge effects between grids and thus allow unprecedented energy resolution. Also, because the linear dimension normal to the grid is small compared to the ion mean free path in high pressure (>100 mTorr) discharges, it can be used without the differential pumping required of larger GEA`s in such discharges. The analyzer has been tested on a plasma beam source (a modified ASTeX Compact ECR source) and on an ASTeX S1500ECR source, and has been used as an edge diagnostic on the VERSATOR tokamak at M.I.T. Ion energy distribution functions as narrow as 5 eV have been measured.

  9. Consideration Regarding Diagnosis Analyze of Corporate Management

    Directory of Open Access Journals (Sweden)

    Mihaela Ciopi OPREA

    2009-01-01

    Full Text Available Diagnosis management aims to identify critical situations and positive aspectsof corporate management. An effective diagnosis made by a team with thestatus of independence from the organization’s management is for managers auseful feedback necessary to improve performance. The work presented focuseson the methodology to achieve effective diagnosis, considering multitudecriteria and variables to be analyzed.

  10. Analyzing computer system performance with Perl

    CERN Document Server

    Gunther, Neil J

    2011-01-01

    This expanded second edition of Analyzing Computer System Performance with Perl::PDQ, builds on the success of the first edition. It contains new chapters on queues, tools and virtualization, and new Perl listing format to aid readability of PDQ models.

  11. Analyzing volatile compounds in dairy products

    Science.gov (United States)

    Volatile compounds give the first indication of the flavor in a dairy product. Volatiles are isolated from the sample matrix and then analyzed by chromatography, sensory methods, or an electronic nose. Isolation may be performed by solvent extraction or headspace analysis, and gas chromatography i...

  12. Strengthening 4-H by Analyzing Enrollment Data

    Science.gov (United States)

    Hamilton, Stephen F.; Northern, Angela; Neff, Robert

    2014-01-01

    The study reported here used data from the ACCESS 4-H Enrollment System to gain insight into strengthening New York State's 4-H programming. Member enrollment lists from 2009 to 2012 were analyzed using Microsoft Excel to determine trends and dropout rates. The descriptive data indicate declining 4-H enrollment in recent years and peak…

  13. Analyzing Languages for Specific Purposes Discourse

    Science.gov (United States)

    Bowles, Hugo

    2012-01-01

    In the last 20 years, technological advancement and increased multidisciplinarity has expanded the range of data regarded as within the scope of languages for specific purposes (LSP) research and the means by which they can be analyzed. As a result, the analytical work of LSP researchers has developed from a narrow focus on specialist terminology…

  14. Imaging thermal plasma mass and velocity analyzer

    Science.gov (United States)

    Yau, Andrew W.; Howarth, Andrew

    2016-07-01

    We present the design and principle of operation of the imaging ion mass and velocity analyzer on the Enhanced Polar Outflow Probe (e-POP), which measures low-energy (1-90 eV/e) ion mass composition (1-40 AMU/e) and velocity distributions using a hemispherical electrostatic analyzer (HEA), a time-of-flight (TOF) gate, and a pair of toroidal electrostatic deflectors (TED). The HEA and TOF gate measure the energy-per-charge and azimuth of each detected ion and the ion transit time inside the analyzer, respectively, providing the 2-D velocity distribution of each major ionospheric ion species and resolving the minor ion species under favorable conditions. The TED are in front of the TOF gate and optionally sample ions at different elevation angles up to ±60°, for measurement of 3-D velocity distribution. We present examples of observation data to illustrate the measurement capability of the analyzer, and show the occurrence of enhanced densities of heavy "minor" O++, N+, and molecular ions and intermittent, high-velocity (a few km/s) upward and downward flowing H+ ions in localized regions of the quiet time topside high-latitude ionosphere.

  15. Quantum Key Distribution with Screening and Analyzing

    CERN Document Server

    Kye, W H

    2006-01-01

    We propose a quantum key distribution scheme by using screening angles and analyzing detectors which enable to notice the presence of Eve who eavesdrops the quantum channel. We show the security of the proposed quantum key distribution against impersonation, photon number splitting, Trojan Horse, and composite attacks.

  16. Quantum Key Distribution with Screening and Analyzing

    OpenAIRE

    Kye, Won-Ho

    2006-01-01

    We propose a quantum key distribution scheme by using screening angles and analyzing detectors which enable to notice the presence of Eve who eavesdrops the quantum channel, as the revised protocol of the recent quantum key distribution [Phys. Rev. Lett. 95, 040501 (2005)]. We discuss the security of the proposed quantum key distribution against various attacks including impersonation attack and Trojan Horse attack.

  17. How to Analyze Company Using Social Network?

    Science.gov (United States)

    Palus, Sebastian; Bródka, Piotr; Kazienko, Przemysław

    Every single company or institution wants to utilize its resources in the most efficient way. In order to do so they have to be have good structure. The new way to analyze company structure by utilizing existing within company natural social network and example of its usage on Enron company are presented in this paper.

  18. Graphic method for analyzing common path interferometers

    DEFF Research Database (Denmark)

    Glückstad, J.

    1998-01-01

    Common path interferometers are widely used for visualizing phase disturbances and fluid flows. They are attractive because of the inherent simplicity and robustness in the setup. A graphic method will be presented for analyzing and optimizing filter parameters in common path interferometers....

  19. Technology and Knowledge Transfer in the Graz Region Ten Years of Experience

    Science.gov (United States)

    Hofer, Franz; Adametz, Christoph; Holzer, Franz

    2004-01-01

    Technology and knowledge transfer from universities to small and medium-sized enterprises (SMEs) is seen as one way to strengthen a region's innovation capability. But what if SMEs do not want to play along? Looking back at some 10 years' experience of supporting SMEs, the authors describe in detail the 'Active Knowledge Transfer' programme, which…

  20. Methodology for analyzing risk at nuclear facilities

    International Nuclear Information System (INIS)

    Highlights: • A new methodology for evaluating the risk at nuclear facilities was developed. • Five measures reflecting all factors that should be concerned to assess risk were developed. • The attributes on NMAC and nuclear security culture are included as attributes for analyzing. • The newly developed methodology can be used to evaluate risk of both existing facility and future nuclear system. - Abstract: A methodology for evaluating risks at nuclear facilities is developed in this work. A series of measures is drawn from the analysis of factors that determine risks. Five measures are created to evaluate risks at nuclear facilities. These include the legal and institutional framework, material control, physical protection system effectiveness, human resources, and consequences. Evaluation attributes are developed for each measure and specific values are given in order to calculate the risk value quantitatively. Questionnaires are drawn up on whether or not a state has properly established a legal and regulatory framework (based on international standards). These questionnaires can be a useful measure for comparing the status of the physical protection regime between two countries. Analyzing an insider threat is not an easy task and no methodology has been developed for this purpose. In this study, attributes that could quantitatively evaluate an insider threat, in the case of an unauthorized removal of nuclear materials, are developed by adopting the Nuclear Material Accounting & Control (NMAC) system. The effectiveness of a physical protection system, P(E), could be analyzed by calculating the probability of interruption, P(I), and the probability of neutralization, P(N). In this study, the Tool for Evaluating Security System (TESS) code developed by KINAC is used to calculate P(I) and P(N). Consequence is an important measure used to analyze risks at nuclear facilities. This measure comprises radiological, economic, and social damage. Social and

  1. Kundt's Tube: An Acoustic Gas Analyzer

    Science.gov (United States)

    Aristov, Natasha; Habekost, Gehsa; Habekost, Achim

    2011-01-01

    A Kundt tube is normally used to measure the speed of sound in gases. Therefore, from known speeds of sound, a Kundt tube can be used to identify gases and their fractions in mixtures. In these experiments, the speed of sound is determined by measuring the frequency of a standing sound wave at a fixed tube length, temperature, and pressure. This…

  2. Analysis of Variance in the Modern Design of Experiments

    Science.gov (United States)

    Deloach, Richard

    2010-01-01

    This paper is a tutorial introduction to the analysis of variance (ANOVA), intended as a reference for aerospace researchers who are being introduced to the analytical methods of the Modern Design of Experiments (MDOE), or who may have other opportunities to apply this method. One-way and two-way fixed-effects ANOVA, as well as random effects ANOVA, are illustrated in practical terms that will be familiar to most practicing aerospace researchers.

  3. A sidelobe suppression method with experiment for underwater acoustic imaging

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    In this paper,a sidelobe suppression method using nonuniformly spaced array with aperture apodization processing is proposed for underwater acoustic imaging in near field,which is studied both in theory and experiment.The focused beamforming based on spherical wave propagation theory is used in the method.Firstly,the nonuniform array with low sidelobe is designed for suppressing the sidelobe of one-way beam pattern by spacing perturbation.Then, applying the aperture apodization technique to underwater ac...

  4. The EPOS Automated Selective Chemistry Analyzer evaluated.

    Science.gov (United States)

    Moses, G C; Lightle, G O; Tuckerman, J F; Henderson, A R

    1986-01-01

    We evaluated the analytical performance of the EPOS (Eppendorf Patient Oriented System) Automated Selective Chemistry Analyzer, using the following tests for serum analytes: alanine and aspartate aminotransferases, lactate dehydrogenase, creatine kinase, gamma-glutamyltransferase, alkaline phosphatase, and glucose. Results from the EPOS correlated well with those from comparison instruments (r greater than or equal to 0.990). Precision and linearity limits were excellent for all tests; linearity of the optical and pipetting systems was satisfactory. Reagent carryover was negligible. Sample-to-sample carryover was less than 1% for all tests, but only lactate dehydrogenase was less than the manufacturer's specified 0.5%. Volumes aspirated and dispensed by the sample and reagent II pipetting systems differed significantly from preset values, especially at lower settings; the reagent I system was satisfactory at all volumes tested. Minimal daily maintenance and an external data-reduction system make the EPOS a practical alternative to other bench-top chemistry analyzers.

  5. Simulation of a Hyperbolic Field Energy Analyzer

    CERN Document Server

    Gonzalez-Lizardo, Angel

    2016-01-01

    Energy analyzers are important plasma diagnostic tools with applications in a broad range of disciplines including molecular spectroscopy, electron microscopy, basic plasma physics, plasma etching, plasma processing, and ion sputtering technology. The Hyperbolic Field Energy Analyzer (HFEA) is a novel device able to determine ion and electron energy spectra and temperatures. The HFEA is well suited for ion temperature and density diagnostics at those situations where ions are scarce. A simulation of the capacities of the HFEA to discriminate particles of a particular energy level, as well as to determine temperature and density is performed in this work. The electric field due the combination of the conical elements, collimator lens, and Faraday cup applied voltage was computed in a well suited three-dimensional grid. The field is later used to compute the trajectory of a set of particles with a predetermined energy distribution. The results include the observation of the particle trajectories inside the sens...

  6. SACO: Static analyzer for concurrent objects

    OpenAIRE

    Albert Albiol, Elvira; Arenas Sánchez, Purificación; Flores Montoya, A.; Genaim, Samir; Gómez-Zamalloa Gil, Miguel; Martín Martín, Enrique; Puebla, G.; Román Díez, Guillermo

    2014-01-01

    We present the main concepts, usage and implementation of SACO, a static analyzer for concurrent objects. Interestingly, SACO is able to infer both liveness(namely termination and resource boundedness) and safety properties (namely deadlock freedom) of programs based on concurrent objects. The system integrates auxiliary analyses such as points-to and may-happen-in-parallel, which are essential for increasing the accuracy of the aforementioned more complex properties. SACO provides accurate ...

  7. LEGAL-EASE:Analyzing Chinese Financial Statements

    Institute of Scientific and Technical Information of China (English)

    EDWARD; MA

    2008-01-01

    In this article,we will focus on under- standing and analyzing the typical accounts of Chinese financial statements,including the balance sheet and income statement. Accounts are generally incorrectly prepared. This can be due to several factors,incom- petence,as well as more serious cases of deliberate attempts to deceive.Regardless, accounts can be understood and errors or specific acts of misrepresentation uncovered. We will conduct some simple analysis to demonstrate how these can be spotted.

  8. Organization theory. Analyzing health care organizations.

    Science.gov (United States)

    Cors, W K

    1997-02-01

    Organization theory (OT) is a tool that can be applied to analyze and understand health care organizations. Transaction cost theory is used to explain, in a unifying fashion, the myriad changes being undertaken by different groups of constituencies in health care. Agency theory is applied to aligning economic incentives needed to ensure Integrated Delivery System (IDS) success. By using tools such as OT, a clearer understanding of organizational changes is possible. PMID:10164970

  9. A gas filter correlation analyzer for methane

    Science.gov (United States)

    Sebacher, D. I.

    1978-01-01

    A fast-response instrument for monitoring CH4 was designed and tested using a modified nondispersive infrared technique. An analysis of the single-beam rotating-cell system is presented along with the signal processing circuit. A calibration of the instrument shows that the technique can be used to measure CH4 concentrations as small as 5 ppm-m and the effects of interfering gases are analyzed.

  10. Information Theory for Analyzing Neural Networks

    OpenAIRE

    Sørngård, Bård

    2014-01-01

    The goal of this thesis was to investigate how information theory could be used to analyze artificial neural networks. For this purpose, two problems, a classification problem and a controller problem were considered. The classification problem was solved with a feedforward neural network trained with backpropagation, the controller problem was solved with a continuous-time recurrent neural network optimized with evolution.Results from the classification problem shows that mutual information ...

  11. Firms’ Innovation Strategies Analyzed and Explained

    OpenAIRE

    Tavassoli, Sam; Karlsson, Charlie

    2015-01-01

    This paper analyzes various innovation strategies of firms. Using five waves of the Community Innovation Survey in Sweden, we have traced the innovative behavior of firms over a ten-year period, i.e. between 2002 and 2012. We distinguish between sixteen innovation strategies, which compose of Schumpeterian four types of innovations (process, product, marketing, and organizational) plus various combinations of these four types. First, we find that firms are not homogenous in choosing innovatio...

  12. The analyzing of Dove marketing strategy

    Institute of Scientific and Technical Information of China (English)

    Guo; Yaohui

    2015-01-01

    <正>1.Introduction In this report,I try to analyze the related information about DOVE chocolate.Firstly,I would like to introduce this product.Dove chocolate is one of a series of products launched by the world’s largest pet food and snack food manufacturers,U.S.multinational food company Mars(Mars).Entered China in 1989,It becomes China’s leading brand of chocolate in

  13. Coordinating, Scheduling, Processing and Analyzing IYA09

    Science.gov (United States)

    Gipson, John; Behrend, Dirk; Gordon, David; Himwich, Ed; MacMillan, Dan; Titus, Mike; Corey, Brian

    2010-01-01

    The IVS scheduled a special astrometric VLBI session for the International Year of Astronomy 2009 (IYA09) commemorating 400 years of optical astronomy and 40 years of VLBI. The IYA09 session is the most ambitious geodetic session to date in terms of network size, number of sources, and number of observations. We describe the process of designing, coordinating, scheduling, pre-session station checkout, correlating, and analyzing this session.

  14. Modular Construction of Shape-Numeric Analyzers

    Directory of Open Access Journals (Sweden)

    Bor-Yuh Evan Chang

    2013-09-01

    Full Text Available The aim of static analysis is to infer invariants about programs that are precise enough to establish semantic properties, such as the absence of run-time errors. Broadly speaking, there are two major branches of static analysis for imperative programs. Pointer and shape analyses focus on inferring properties of pointers, dynamically-allocated memory, and recursive data structures, while numeric analyses seek to derive invariants on numeric values. Although simultaneous inference of shape-numeric invariants is often needed, this case is especially challenging and is not particularly well explored. Notably, simultaneous shape-numeric inference raises complex issues in the design of the static analyzer itself. In this paper, we study the construction of such shape-numeric, static analyzers. We set up an abstract interpretation framework that allows us to reason about simultaneous shape-numeric properties by combining shape and numeric abstractions into a modular, expressive abstract domain. Such a modular structure is highly desirable to make its formalization and implementation easier to do and get correct. To achieve this, we choose a concrete semantics that can be abstracted step-by-step, while preserving a high level of expressiveness. The structure of abstract operations (i.e., transfer, join, and comparison follows the structure of this semantics. The advantage of this construction is to divide the analyzer in modules and functors that implement abstractions of distinct features.

  15. Thermo Scientific Sulfur Dioxide Analyzer Instrument Handbook

    Energy Technology Data Exchange (ETDEWEB)

    Springston, S. R. [Brookhaven National Lab. (BNL), Upton, NY (United States)

    2016-03-01

    The Sulfur Dioxide Analyzer measures sulfur dioxide based on absorbance of UV light at one wavelength by SO2 molecules which then decay to a lower energy state by emitting UV light at a longer wavelength. Specifically, SO2 + hυ1 →SO2 *→SO2 + hυ2 The emitted light is proportional to the concentration of SO2 in the optical cell. External communication with the analyzer is available through an Ethernet port configured through the instrument network of the AOS systems. The Model 43i-TLE is part of the i-series of Thermo Scientific instruments. The i-series instruments are designed to interface with external computers through the proprietary Thermo Scientific iPort Software. However, this software is somewhat cumbersome and inflexible. BNL has written an interface program in National Instruments LabView that both controls the Model 43i-TLE Analyzer AND queries the unit for all measurement and housekeeping data. The LabView vi (the software program written by BNL) ingests all raw data from the instrument and outputs raw data files in a uniform data format similar to other instruments in the AOS and described more fully in Section 6.0 below.

  16. Analyzing Malware Based on Volatile Memory

    Directory of Open Access Journals (Sweden)

    Liang Hu

    2013-11-01

    Full Text Available To explain the necessity of comprehensive and automatically analysis process for volatile memory, this paper summarized ordinarily analyzing methods and their common points especially for concerned data source. Then, a memory analysis framework Volatiltiy-2.2 and statistical output file size are recommended. In addition, to address the limitation of plug-ins classification in analyzing procedure, a user perspective classify is necessary and proposed. Furthermore, according to target data source differences on the base of result data set volume and employed relational method is introduced for comprehensive analysis guideline procedure. Finally, a test demo including DLLs loading order list analyzing is recommend, in which DLL load list is regard as different kind of characteristics typical data source with process and convert into process behavior fingerprint. The clustering for the fingerprint is employed string similar degree algorithm model in the demo, which has a wide range applications in traditional malware behavior analysis, and it is proposed that these methods also can be applied for volatile memory

  17. Aliasing Errours in Parallel Signature Analyzers

    Institute of Scientific and Technical Information of China (English)

    闵应骅; YashwantK.Malaiya

    1990-01-01

    A Linear Feedback Shift Register(LFSR)can be used to compress test response data as a Signature Analyzer(SA).Parallel Signature Analyzers(PSAs)implemented as multiple input LFSRs are faster and require less hardware overhead than Serial Signature Analyzers(SSAs) for compacting test response data for Built-In Self-Test(BIST)in IC of boare-testing environments.However,the SAs are prone to aliasing errors because of some specific types of error patterns.An alias is a faulty output signature that is identical to the fault-free signature.A penetrating analysis of detecting capability of SAs depends strongly on mathematical manipulations,instead of being aware of some special cases of examples.In addition,the analysis should not be restricted to a particular structure of LFSR,but be appropriate for various structures of LFSRs.This paper presents necessary and sufficient conditions for aliasing errors based on a complete mathematical description of various types of SAs.An LFSR reconfiguration scheme is suggested which will prevent any aliasing double errors.Such a prevention cannot be obtained by any extension of an LFSR.

  18. Method of stabilizing single channel analyzers

    International Nuclear Information System (INIS)

    A method and the apparatus to reduce the drift of single channel analyzers are described. Essentially, this invention employs a time-sharing or multiplexing technique to insure that the outputs from two single channel analyzers (SCAS) maintain the same count ratio regardless of variations in the threshold voltage source or voltage changes, the multiplexing technique is accomplished when a flip flop, actuated by a clock, changes state to switch the output from the individual SCAS before these outputs are sent to a ratio counting scalar. In the particular system embodiment disclosed that illustrates this invention, the sulfur content of coal is determined by subjecting the coal to radiation from a neutron producing source. A photomultiplier and detector system equates the transmitted gamma radiation to an analog voltage signal and sends the same signal after amplification, to a SCA system that contains the invention. Therein, at least two single channel analyzers scan the analog signal over different parts of a spectral region. The two outputs may then be sent to a digital multiplexer so that the output from the multiplexer contains counts falling within two distinct segments of the region. By dividing the counts from the multiplexer by each other, the percentage of sulfur within the coal sample under observation may be determined. (U.S.)

  19. Operating System Performance Analyzer for Embedded Systems

    OpenAIRE

    Shahzada Khayyam Nisar; Maqsood Ahmed; Huma Ayub; Iram Baig

    2011-01-01

    RTOS provides a number of services to an embedded system designs such as case management, memory management, and Resource Management to build a program. Choosing the best OS for an embedded system is based on the available OS for system designers and their previous knowledge and experience. This can cause an imbalance between the OS and embedded systems. RTOS performance analysis is critical in the design and integration of embedded software to ensure that limits the application meet at runti...

  20. A computer program for analyzing channel geometry

    Science.gov (United States)

    Regan, R.S.; Schaffranek, R.W.

    1985-01-01

    The Channel Geometry Analysis Program (CGAP) provides the capability to process, analyze, and format cross-sectional data for input to flow/transport simulation models or other computational programs. CGAP allows for a variety of cross-sectional data input formats through use of variable format specification. The program accepts data from various computer media and provides for modification of machine-stored parameter values. CGAP has been devised to provide a rapid and efficient means of computing and analyzing the physical properties of an open-channel reach defined by a sequence of cross sections. CGAP 's 16 options provide a wide range of methods by which to analyze and depict a channel reach and its individual cross-sectional properties. The primary function of the program is to compute the area, width, wetted perimeter, and hydraulic radius of cross sections at successive increments of water surface elevation (stage) from data that consist of coordinate pairs of cross-channel distances and land surface or channel bottom elevations. Longitudinal rates-of-change of cross-sectional properties are also computed, as are the mean properties of a channel reach. Output products include tabular lists of cross-sectional area, channel width, wetted perimeter, hydraulic radius, average depth, and cross-sectional symmetry computed as functions of stage; plots of cross sections; plots of cross-sectional area and (or) channel width as functions of stage; tabular lists of cross-sectional area and channel width computed as functions of stage for subdivisions of a cross section; plots of cross sections in isometric projection; and plots of cross-sectional area at a fixed stage as a function of longitudinal distance along an open-channel reach. A Command Procedure Language program and Job Control Language procedure exist to facilitate program execution on the U.S. Geological Survey Prime and Amdahl computer systems respectively. (Lantz-PTT)

  1. Thermo Scientific Ozone Analyzer Instrument Handbook

    Energy Technology Data Exchange (ETDEWEB)

    Springston, S. R. [Brookhaven National Lab. (BNL), Upton, NY (United States)

    2016-03-01

    The primary measurement output from the Thermo Scientific Ozone Analyzer is the concentration of the analyte (O3) reported at 1-s resolution in units of ppbv in ambient air. Note that because of internal pneumatic switching limitations the instrument only makes an independent measurement every 4 seconds. Thus, the same concentration number is repeated roughly 4 times at the uniform, monotonic 1-s time base used in the AOS systems. Accompanying instrument outputs include sample temperatures, flows, chamber pressure, lamp intensities and a multiplicity of housekeeping information. There is also a field for operator comments made at any time while data is being collected.

  2. FOMA: A Fast Optical Multichannel Analyzer

    Science.gov (United States)

    Haskovec, J. S.; Bramson, G.; Brooks, N. H.; Perry, M.

    1989-12-01

    A Fast Optical Multichannel Analyzer (FOMA) was built for spectroscopic measurements with fast time resolution on the DIII-D tokamak. The FOMA utilizes a linear photodiode array (RETICON RL 1024 SA) as the detector sensor. An external recharge switch and ultrafast operational amplifiers permit a readout time per pixel of 300 ns. In conjunction with standard CAMAC digitizer and timing modules, a readout time of 500 microns is achieved for the full 1024-element array. Data acquired in bench tests and in actual spectroscopic measurements on the DIII-D tokamak is presented to illustrate the camera's capability.

  3. Spectrum Analyzers Incorporating Tunable WGM Resonators

    Science.gov (United States)

    Savchenkov, Anatoliy; Matsko, Andrey; Strekalov, Dmitry; Maleki, Lute

    2009-01-01

    A photonic instrument is proposed to boost the resolution for ultraviolet/ optical/infrared spectral analysis and spectral imaging allowing the detection of narrow (0.00007-to-0.07-picometer wavelength resolution range) optical spectral signatures of chemical elements in space and planetary atmospheres. The idea underlying the proposal is to exploit the advantageous spectral characteristics of whispering-gallery-mode (WGM) resonators to obtain spectral resolutions at least three orders of magnitude greater than those of optical spectrum analyzers now in use. Such high resolutions would enable measurement of spectral features that could not be resolved by prior instruments.

  4. APPLICATION OF IMAGE MANIPULATION FOR CAVITATION ANALYZING

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    A new method, which is called image manipulation,is introduced to analyze the cavitation of flow field for the first time. As the complexity of the cavitation development must be considering,only the method of image manipulation can calculate the strength of the cavitation more accurately. This method based on wavelet transform is used to eliminate the noise. The area of the cavitations is deduced to serve as the strength of cavitation. The method is applied in an example of inducer's rotating cavitation. The results show that using image manipulation can get the accurate date of cavitation with ease,and the reason of the inducer shaft's vibration is uncovered clearly.

  5. CRISP90 - SOFTWARE DESIGN ANALYZER SYSTEM

    Science.gov (United States)

    Tausworthe, R. C.

    1994-01-01

    The CRISP90 Software Design Analyzer System, an update of CRISP-80, is a set of programs forming a software design and documentation tool which supports top-down, hierarchic, modular, structured design and programming methodologies. The quality of a computer program can often be significantly influenced by the design medium in which the program is developed. The medium must foster the expression of the programmer's ideas easily and quickly, and it must permit flexible and facile alterations, additions, and deletions to these ideas as the design evolves. The CRISP90 software design analyzer system was developed to provide the PDL (Programmer Design Language) programmer with such a design medium. A program design using CRISP90 consists of short, English-like textual descriptions of data, interfaces, and procedures that are imbedded in a simple, structured, modular syntax. The display is formatted into two-dimensional, flowchart-like segments for a graphic presentation of the design. Together with a good interactive full-screen editor or word processor, the CRISP90 design analyzer becomes a powerful tool for the programmer. In addition to being a text formatter, the CRISP90 system prepares material that would be tedious and error prone to extract manually, such as a table of contents, module directory, structure (tier) chart, cross-references, and a statistics report on the characteristics of the design. Referenced modules are marked by schematic logic symbols to show conditional, iterative, and/or concurrent invocation in the program. A keyword usage profile can be generated automatically and glossary definitions inserted into the output documentation. Another feature is the capability to detect changes that were made between versions. Thus, "change-bars" can be placed in the output document along with a list of changed pages and a version history report. Also, items may be marked as "to be determined" and each will appear on a special table until the item is

  6. Analyzing PICL trace data with MEDEA

    Energy Technology Data Exchange (ETDEWEB)

    Merlo, A.P. [Pavia Univ. (Italy). Dipt di Informatica e Sistemistica; Worley, P.H. [Oak Ridge National Lab., TN (United States)

    1993-11-01

    Execution traces and performance statistics can be collected for parallel applications on a variety of multiprocessor platforms by using the Portable Instrumented Communication Library (PICL). The static and dynamic performance characteristics of performance data can be analyzed easily and effectively with the facilities provided within the MEasurements Description Evaluation and Analysis tool (MEDEA). This report describes the integration of the PICL trace file format into MEDEA. A case study is then outlined that uses PICL and MEDEA to characterize the performance of a parallel benchmark code executed on different hardware platforms and using different parallel algorithms and communication protocols.

  7. Using SCR methods to analyze requirements documentation

    Science.gov (United States)

    Callahan, John; Morrison, Jeffery

    1995-01-01

    Software Cost Reduction (SCR) methods are being utilized to analyze and verify selected parts of NASA's EOS-DIS Core System (ECS) requirements documentation. SCR is being used as a spot-inspection tool. Through this formal and systematic approach of the SCR requirements methods, insights as to whether the requirements are internally inconsistent or incomplete as the scenarios of intended usage evolve in the OC (Operations Concept) documentation. Thus, by modelling the scenarios and requirements as mode charts using the SCR methods, we have been able to identify problems within and between the documents.

  8. Recovering a fecal habitus: analyzing heroin users' toilet talk.

    Science.gov (United States)

    Pickering, Lucy; Neale, Joanne; Nettleton, Sarah

    2013-01-01

    There is a particular silence around the social life of defecation. Little analyzed, rarely discussed in polite conversation, it largely appears only at moments of dysfunction. For active heroin users, digestion is often characterized by such dysfunction and experienced through constipation; recovery, a welcome return to defecating 'normally.' Drawing on interviews with active and recovering heroin users in southern England, we focus on this moment of transition in order to illuminate the experiences and transitions between a dysfunctional, constipated body and 'normal' defecation. We discuss the contrast between candor in talk in active use with the silences surrounding defecation talk in recovery, and analyze these twin shifts within the context of a historical progression within Europe toward ever-increasing levels of masking defecation from social life. Located thus, this analysis of the tipping point between constipation and 'normality,' disclosure and embarrassment, provides a powerful lens through which to view the invisibility of defecation in contemporary British social life.

  9. Analyzing and Mining Ordered Information Tables

    Institute of Scientific and Technical Information of China (English)

    SAI Ying (赛英); Y. Y. Yao

    2003-01-01

    Work in inductive learning has mostly been concentrated on classifying. However,there are many applications in which it is desirable to order rather than to classify instances. For modelling ordering problems, we generalize the notion of information tables to ordered information tables by adding order relations in attribute values. Then we propose a data analysis model by analyzing the dependency of attributes to describe the properties of ordered information tables.The problem of mining ordering rules is formulated as finding association between orderings of attribute values and the overall ordering of objects. An ordering rules may state that "if the value of an object x on an attribute a is ordered ahead of the value of another object y on the same attribute, then x is ordered ahead of y". For mining ordering rules, we first transform an ordered information table into a binary information table, and then apply any standard machine learning and data mining algorithms. As an illustration, we analyze in detail Maclean's universities ranking for the year 2000.

  10. Optoacoustic 13C-breath test analyzer

    Science.gov (United States)

    Harde, Hermann; Helmrich, Günther; Wolff, Marcus

    2010-02-01

    The composition and concentration of exhaled volatile gases reflects the physical ability of a patient. Therefore, a breath analysis allows to recognize an infectious disease in an organ or even to identify a tumor. One of the most prominent breath tests is the 13C-urea-breath test, applied to ascertain the presence of the bacterium helicobacter pylori in the stomach wall as an indication of a gastric ulcer. In this contribution we present a new optical analyzer that employs a compact and simple set-up based on photoacoustic spectroscopy. It consists of two identical photoacoustic cells containing two breath samples, one taken before and one after capturing an isotope-marked substrate, where the most common isotope 12C is replaced to a large extent by 13C. The analyzer measures simultaneously the relative CO2 isotopologue concentrations in both samples by exciting the molecules on specially selected absorption lines with a semiconductor laser operating at a wavelength of 2.744 μm. For a reliable diagnosis changes of the 13CO2 concentration of 1% in the exhaled breath have to be detected at a concentration level of this isotope in the breath of about 500 ppm.

  11. Analyzing Network Coding Gossip Made Easy

    CERN Document Server

    Haeupler, Bernhard

    2010-01-01

    We give a new technique to analyze the stopping time of gossip protocols that are based on random linear network coding (RLNC). Our analysis drastically simplifies, extends and strengthens previous results. We analyze RLNC gossip in a general framework for network and communication models that encompasses and unifies the models used previously in this context. We show, in most settings for the first time, that it converges with high probability in the information-theoretically optimal time. Most stopping times are of the form O(k + T) where k is the number of messages to be distributed and T is the time it takes to disseminate one message. This means RLNC gossip achieves "perfect pipelining". Our analysis directly extends to highly dynamic networks in which the topology can change completely at any time. This remains true even if the network dynamics are controlled by a fully adaptive adversary that knows the complete network state. Virtually nothing besides simple O(kT) sequential flooding protocols was prev...

  12. Atmospheric Aerosol Chemistry Analyzer: Demonstration of feasibility

    Energy Technology Data Exchange (ETDEWEB)

    Mroz, E.J.; Olivares, J.; Kok, G.

    1996-04-01

    This is the final report of a three-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The project objective was to demonstrate the technical feasibility of an Atmospheric Aerosol Chemistry Analyzer (AACA) that will provide a continuous, real-time analysis of the elemental (major, minor and trace) composition of atmospheric aerosols. The AACA concept is based on sampling the atmospheric aerosol through a wet cyclone scrubber that produces an aqueous suspension of the particles. This suspension can then be analyzed for elemental composition by ICP/MS or collected for subsequent analysis by other methods. The key technical challenge was to develop a wet cyclone aerosol sampler suitable for respirable particles found in ambient aerosols. We adapted an ultrasonic nebulizer to a conventional, commercially available, cyclone aerosol sampler and completed collection efficiency tests for the unit, which was shown to efficiently collect particles as small as 0.2 microns. We have completed the necessary basic research and have demonstrated the feasibility of the AACA concept.

  13. 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.

  14. Analyzing delay causes in Egyptian construction projects

    Directory of Open Access Journals (Sweden)

    Mohamed M. Marzouk

    2014-01-01

    Full Text Available Construction delays are common problems in civil engineering projects in Egypt. These problems occur frequently during project life-time leading to disputes and litigation. Therefore, it is essential to study and analyze causes of construction delays. This research presents a list of construction delay causes retrieved from literature. The feedback of construction experts was obtained through interviews. Subsequently, a questionnaire survey was prepared. The questionnaire survey was distributed to thirty-three construction experts who represent owners, consultants, and contractor’s organizations. Frequency Index, Severity Index, and Importance Index are calculated and according to the highest values of them the top ten delay causes of construction projects in Egypt are determined. A case study is analyzed and compared to the most important delay causes in the research. Statistical analysis is carried out using analysis of variance ANOVA method to test delay causes, obtained from the survey. The test results reveal good correlation between groups while there is significant difference between them for some delay causes and finally roadmap for prioritizing delay causes groups is presented.

  15. The Solar Wind Ion Analyzer for MAVEN

    Science.gov (United States)

    Halekas, J. S.; Taylor, E. R.; Dalton, G.; Johnson, G.; Curtis, D. W.; McFadden, J. P.; Mitchell, D. L.; Lin, R. P.; Jakosky, B. M.

    2015-12-01

    The Solar Wind Ion Analyzer (SWIA) on the MAVEN mission will measure the solar wind ion flows around Mars, both in the upstream solar wind and in the magneto-sheath and tail regions inside the bow shock. The solar wind flux provides one of the key energy inputs that can drive atmospheric escape from the Martian system, as well as in part controlling the structure of the magnetosphere through which non-thermal ion escape must take place. SWIA measurements contribute to the top level MAVEN goals of characterizing the upper atmosphere and the processes that operate there, and parameterizing the escape of atmospheric gases to extrapolate the total loss to space throughout Mars' history. To accomplish these goals, SWIA utilizes a toroidal energy analyzer with electrostatic deflectors to provide a broad 360∘×90∘ field of view on a 3-axis spacecraft, with a mechanical attenuator to enable a very high dynamic range. SWIA provides high cadence measurements of ion velocity distributions with high energy resolution (14.5 %) and angular resolution (3.75∘×4.5∘ in the sunward direction, 22.5∘×22.5∘ elsewhere), and a broad energy range of 5 eV to 25 keV. Onboard computation of bulk moments and energy spectra enable measurements of the basic properties of the solar wind at 0.25 Hz.

  16. Analyzing endocrine system conservation and evolution.

    Science.gov (United States)

    Bonett, Ronald M

    2016-08-01

    Analyzing variation in rates of evolution can provide important insights into the factors that constrain trait evolution, as well as those that promote diversification. Metazoan endocrine systems exhibit apparent variation in evolutionary rates of their constituent components at multiple levels, yet relatively few studies have quantified these patterns and analyzed them in a phylogenetic context. This may be in part due to historical and current data limitations for many endocrine components and taxonomic groups. However, recent technological advancements such as high-throughput sequencing provide the opportunity to collect large-scale comparative data sets for even non-model species. Such ventures will produce a fertile data landscape for evolutionary analyses of nucleic acid and amino acid based endocrine components. Here I summarize evolutionary rate analyses that can be applied to categorical and continuous endocrine traits, and also those for nucleic acid and protein-based components. I emphasize analyses that could be used to test whether other variables (e.g., ecology, ontogenetic timing of expression, etc.) are related to patterns of rate variation and endocrine component diversification. The application of phylogenetic-based rate analyses to comparative endocrine data will greatly enhance our understanding of the factors that have shaped endocrine system evolution.

  17. Sentiment Analyzer for Arabic Comments System

    Directory of Open Access Journals (Sweden)

    Alaa El-Dine Ali Hamouda

    2013-04-01

    Full Text Available Today, the number of users of social network is increasing. Millions of users share opinions on different aspects of life every day. Therefore social network are rich sources of data for opinion mining and sentiment analysis. Also users have become more interested in following news pages on Facebook. Several posts; political for example, have thousands of users’ comments that agree/disagree with the post content. Such comments can be a good indicator for the community opinion about the post content. For politicians, marketers, decision makers …, it is required to make sentiment analysis to know the percentage of users agree, disagree and neutral respect to a post. This raised the need to analyze theusers’ comments in Facebook. We focused on Arabic Facebook news pages for the task of sentiment analysis. We developed a corpus for sentiment analysis and opinion mining purposes. Then, we used different machine learning algorithms – decision tree, support vector machines, and naive bayes - to develop sentiment analyzer. The performance of the system using each technique was evaluated and compared with others.

  18. Analyzing the flight of a quadcopter using a smartphone

    CERN Document Server

    Monteiro, Martín; Cabeza, Cecilia; Marti, Arturo C

    2015-01-01

    Remotely-controlled helicopters and planes have been used as toys for decades. However, only recently, advances in sensor technologies have made possible to easily flight and control theses devices at an affordable price. Along with their increasing availability the educational opportunities are also proliferating. Here, a simple experiment in which a smartphone is mounted on a quadcopter is proposed to investigate the basics of a flight. Thanks to the smartphone's built-in accelerometer and gyroscope, take off, landing and yaw are analyzed.

  19. Increasing process understanding by analyzing complex interactions in experimental data

    DEFF Research Database (Denmark)

    Naelapaa, Kaisa; Allesø, Morten; Kristensen, Henning Gjelstrup;

    2009-01-01

    of experimental results. In this study, experiments based on mixed factorial design of coating process were performed. Drug release was analyzed by traditional analysis of variance (ANOVA) and generalized multiplicative ANOVA (GEMANOVA). GEMANOVA modeling is introduced in this study as a new tool for increased...... understanding of a coating process. It was possible to model the response, that is, the amount of drug released, using both mentioned techniques. However, the ANOVAmodel was difficult to interpret as several interactions between process parameters existed. In contrast to ANOVA, GEMANOVA is especially suited...

  20. Analyzing covert social network foundation behind terrorism disaster

    CERN Document Server

    Maeno, Yoshiharu

    2007-01-01

    This paper addresses a method to analyze the covert social network foundation hidden behind the terrorism disaster. It is to solve a node discovery problem, which means to discover a node, which functions relevantly in a social network, but escaped from monitoring on the presence and mutual relationship of nodes. The method aims at integrating the expert investigator's prior understanding, insight on the terrorists' social network nature derived from the complex graph theory, and computational data processing. The social network responsible for the 9/11 attack in 2001 is used to execute simulation experiment to evaluate the performance of the method.

  1. Inexpensive LED-based spectrophotometer for analyzing optical coatings

    CERN Document Server

    Hardie, Kayla; Kuntz, Katanya B; Jennewein, Thomas

    2016-01-01

    Optical coatings are widespread in everyday life, from camera lenses to glasses, to complex optics experiments. A simple, reliable device that can quickly and inexpensively analyze optical coatings is a valuable laboratory tool. Such a device can identify unknown or mislabelled optics, and characterize the transmission spectra of optical elements used in an experiment. We present the design and characterization of a LED-based spectrophotometer, and demonstrate its ability to identify different optical coatings. Our approach uses ten LEDs that cover a spectrum from 365 nm to 1000 nm. A small servomotor and microcontroller rotates a LED board to sequentially position each LED over an optical sample, and the transmitted light corresponding to each LED is measured with a silicon photodetector. The device is automated, portable, inexpensive, user-friendly and simple to build.

  2. Analyzing Enterprise Networks Needs: Action Research from the Mechatronics Sector

    Science.gov (United States)

    Cagnazzo, Luca; Taticchi, Paolo; Bidini, Gianni; Baglieri, Enzo

    New business models and theories are developing nowadays towards collaborative environments direction, and many new tools in sustaining companies involved in these organizations are emerging. Among them, a plethora of methodologies to analyze their needs are already developed for single companies. Few academic works are available about Enterprise Networks (ENs) need analysis. This paper presents the learning from an action research (AR) in the mechatronics sector: AR has been used in order to experience the issue of evaluating network needs and therefore define, develop, and test a complete framework for network evaluation. Reflection on the story in the light of the experience and the theory is presented, as well as extrapolation to a broader context and articulation of usable knowledge.

  3. The project of centre coexistence. One way of working autonomy and accountability of students El proyecto de convivencia de centro. Una manera de trabajar la autonomía y la responsabilidad del alumnado El projecte de convivència de centre. Una manera de treballar l’autonomia i la responsabilitat de l’alumnat / Le projet de coexistence du centre. Une façon de travailler l'autonomie et la responsabilisation des élèves

    Directory of Open Access Journals (Sweden)

    Glòria Vericat

    2012-11-01

    Full Text Available The school is a reflection of society in that part. A democratic society involves a school that lives and practices of democracy. Our rights, our freedoms and our responsibilities rest on our independence and responsibility. One way to work these issues from the proposed center coexistence, where it articulates the life of the school. Education in values required to live with them in all spheres of our lives. Education in values also means educating the ability to evaluate. This capability allows us to assess people were free, critical, fair and supportive, aware of the reality of our immediate surroundings and the global context in general and committed to humanity, with future generations and the sustainability of the planet. In accordance with these considerations, the proposed center coexistence can be based on the following three blocks of values in which we can fit the values, understood as our life choices: a the value of the person human dignity, b the value of democracy and citizenship, and c the value of equality and difference.La escuela es un reflejo de la sociedad en la que se inscribe. Una sociedad democrática supone una escuela que viva y practique la democracia. Nuestros derechos, nuestras libertades y nuestros deberes descansan sobre nuestra autonomía y responsabilidad. Una forma de trabajar estos aspectos en la escuela es desde el proyecto de convivencia de centro, donde se ha de incardinar toda la vida del centro educativo. Educar en valores exige convivir con ellos en todos los ámbitos de nuestra vida. Educar en valores significa, también, educar la capacidad de valorar. Esta capacidad de valorar nos permite ser personas libres, críticas, justas y solidarias, conscientes de la realidad de nuestro entorno más inmediato y del contexto mundial en general, y comprometidas con la humanidad, con las generaciones futuras y con la sostenibilidad del planeta. De acuerdo con estas consideraciones, el proyecto de convivencia de

  4. Priorización y análisis de problemas de salud con una mirada desde la equidad: experiencia en el nivel local en Venezuela Approaches to determine priorities and to analyze problems of health with a look from the equity: experience in the local level in Venezuela

    Directory of Open Access Journals (Sweden)

    Henny Heredia

    2011-03-01

    Full Text Available En este artículo se analiza la aplicación del momento explicativo de la Planificación Estratégica Situacional (PES y el Análisis de la Situación de Salud (ASIS, como enfoques que conjugados permiten priorizar con una mirada desde la equidad problemas de salud en el nivel local factibles de intervención. A través del estudio de un caso desarrollado en la parroquia Zuata del Estado Aragua, Venezuela, se presenta la aplicación de ambos enfoques. Los actores claves de dicha parroquia priorizaron la baja cobertura de agua potable, como problema de salud. Al analizar el problema se seleccionaron las siguientes causas claves para elaborar la propuesta de acción: escasa participación comunitaria, debilidad de planes gubernamentales, ausencia de políticas urbanísticas, inadecuada administración de los recursos públicos y poca conciencia en el uso racional del agua. Al final se concluye que la articulación PES-ASIS contribuye a generar insumos que concretizados por los actores en un plan de acción, pueden contribuir en la reducción de inequidades. Asimismo, la participación activa de los actores permite evidenciar los problemas reales de la población y construir un plan de demandas.This article analyzes the application of the explanatory moment of the Strategic Situational Planning (SSP and the Analysis of the Situation of Health (ASIS, as approaches that together, allow to prioritize with a look from the equity problems of health in the local level feasible of intervention. By using the case study developed in the parish Zuata of Aragua State, Venezuela, it can be observed the application of both approaches The main actors of the above mentioned parish prioritized the low coverage of drinkable water, like a health problem. On having analyzed the problem, the following causes were selected to prepare the proposed action: scarce community participation, weakness of governmental plans, absence of political town-planning, inadequate

  5. Analyzing and reducing plagiarism at university

    Directory of Open Access Journals (Sweden)

    Jorge López Puga

    2014-12-01

    Full Text Available Plagiarism is one of the less desirable practises in the academic context. This paper presents an experience of massive plagiarism detection at university and the steps taken to prevent its subsequent occurrence. Plagiarism was detected in the first assessment phase of a research project practise. As a result, students were required to arrange ethical group discussions with the professor to prevent plagiarism in the future. A substantial reduction in the rate of plagiarism was observed from the first practical assessment to the second one, t(16=2.5, p=.02, d=0.83, 1-?=.63, unilateral contrast. Additionally, a survey was developed to analyse students’ opinions and attitudes about plagiarism. A sample of 64 students (15 boys and 49 girls with an average age of 22.69 (SD=2.8 filled in an electronic questionnaire. More than a half of the sample (56.92% admitted that they had plagiarised before but most of the students (83.08% agreed they would not like someone else plagiarising their reports. A preliminary short scale to measure attitude towards plagiarism in undergraduate students at university is provided. Finally, a set of recommendations are given based on this experience to prevent and to reduce the level of plagiarism in the university contex.

  6. Analyzing acoustic phenomena with a smartphone microphone

    Science.gov (United States)

    Kuhn, Jochen; Vogt, Patrik

    2013-02-01

    This paper describes how different sound types can be explored using the microphone of a smartphone and a suitable app. Vibrating bodies, such as strings, membranes, or bars, generate air pressure fluctuations in their immediate vicinity, which propagate through the room in the form of sound waves. Depending on the triggering mechanism, it is possible to differentiate between four types of sound waves: tone, sound, noise, and bang. In everyday language, non-experts use the terms "tone" and "sound" synonymously; however, from a physics perspective there are very clear differences between the two terms. This paper presents experiments that enable learners to explore and understand these differences. Tuning forks and musical instruments (e.g., recorders and guitars) can be used as equipment for the experiments. The data are captured using a smartphone equipped with the appropriate app (in this paper we describe the app Audio Kit for iOS systems ). The values captured by the smartphone are displayed in a screen shot and then viewed directly on the smartphone or exported to a computer graphics program for printing.

  7. Stackable differential mobility analyzer for aerosol measurement

    Energy Technology Data Exchange (ETDEWEB)

    Cheng, Meng-Dawn (Oak Ridge, TN); Chen, Da-Ren (Creve Coeur, MO)

    2007-05-08

    A multi-stage differential mobility analyzer (MDMA) for aerosol measurements includes a first electrode or grid including at least one inlet or injection slit for receiving an aerosol including charged particles for analysis. A second electrode or grid is spaced apart from the first electrode. The second electrode has at least one sampling outlet disposed at a plurality different distances along its length. A volume between the first and the second electrode or grid between the inlet or injection slit and a distal one of the plurality of sampling outlets forms a classifying region, the first and second electrodes for charging to suitable potentials to create an electric field within the classifying region. At least one inlet or injection slit in the second electrode receives a sheath gas flow into an upstream end of the classifying region, wherein each sampling outlet functions as an independent DMA stage and classifies different size ranges of charged particles based on electric mobility simultaneously.

  8. Statistical network analysis for analyzing policy networks

    DEFF Research Database (Denmark)

    Robins, Garry; Lewis, Jenny; Wang, Peng

    2012-01-01

    To analyze social network data using standard statistical approaches is to risk incorrect inference. The dependencies among observations implied in a network conceptualization undermine standard assumptions of the usual general linear models. One of the most quickly expanding areas of social......), and stochastic actor-oriented models. We focus most attention on ERGMs by providing an illustrative example of a model for a strategic information network within a local government. We draw inferences about the structural role played by individuals recognized as key innovators and conclude that such an approach...... and policy network methodology is the development of statistical modeling approaches that can accommodate such dependent data. In this article, we review three network statistical methods commonly used in the current literature: quadratic assignment procedures, exponential random graph models (ERGMs...

  9. Analyzing, Modelling, and Designing Software Ecosystems

    DEFF Research Database (Denmark)

    Manikas, Konstantinos

    the development, implementation, and use of telemedicine services. We initially expand the theory of software ecosystems by contributing to the definition and understanding of software ecosystems, providing means of analyzing existing and designing new ecosystems, and defining and measuring the qualities...... structures, supporting actor involvement in the ecosystem, and (v) proper orchestration and governance of the ecosystem to promote and support the changes and the health of the ecosystem. Our work contributes to Net4Care, a platform to serve as the common platform in the software ecosystem under...... establishment. In addition, it contributes by providing input and guidelines on the role and activity of 4S organization, an organization to serve as an orchestrator in the ecosystem with the aim of managing the platform, supporting actor and software interactions, and promoting the ecosystem health...

  10. Fully Analyzing an Algebraic Polya Urn Model

    CERN Document Server

    Morcrette, Basile

    2012-01-01

    This paper introduces and analyzes a particular class of Polya urns: balls are of two colors, can only be added (the urns are said to be additive) and at every step the same constant number of balls is added, thus only the color compositions varies (the urns are said to be balanced). These properties make this class of urns ideally suited for analysis from an "analytic combinatorics" point-of-view, following in the footsteps of Flajolet-Dumas-Puyhaubert, 2006. Through an algebraic generating function to which we apply a multiple coalescing saddle-point method, we are able to give precise asymptotic results for the probability distribution of the composition of the urn, as well as local limit law and large deviation bounds.

  11. Analyzing Options for Airborne Emergency Wireless Communications

    Energy Technology Data Exchange (ETDEWEB)

    Michael Schmitt; Juan Deaton; Curt Papke; Shane Cherry

    2008-03-01

    In the event of large-scale natural or manmade catastrophic events, access to reliable and enduring commercial communication systems is critical. Hurricane Katrina provided a recent example of the need to ensure communications during a national emergency. To ensure that communication demands are met during these critical times, Idaho National Laboratory (INL) under the guidance of United States Strategic Command has studied infrastructure issues, concerns, and vulnerabilities associated with an airborne wireless communications capability. Such a capability could provide emergency wireless communications until public/commercial nodes can be systematically restored. This report focuses on the airborne cellular restoration concept; analyzing basic infrastructure requirements; identifying related infrastructure issues, concerns, and vulnerabilities and offers recommended solutions.

  12. Analyzing petabytes of data with Hadoop

    CERN Document Server

    CERN. Geneva

    2009-01-01

    Abstract The open source Apache Hadoop project provides a powerful suite of tools for storing and analyzing petabytes of data using commodity hardware. After several years of production use inside of web companies like Yahoo! and Facebook and nearly a year of commercial support and development by Cloudera, the technology is spreading rapidly through other disciplines, from financial services and government to life sciences and high energy physics. The talk will motivate the design of Hadoop and discuss some key implementation details in depth. It will also cover the major subprojects in the Hadoop ecosystem, go over some example applications, highlight best practices for deploying Hadoop in your environment, discuss plans for the future of the technology, and provide pointers to the many resources available for learning more. In addition to providing more information about the Hadoop platform, a major goal of this talk is to begin a dialogue with the ATLAS research team on how the tools commonly used in t...

  13. Analyzing Strategic Business Rules through Simulation Modeling

    Science.gov (United States)

    Orta, Elena; Ruiz, Mercedes; Toro, Miguel

    Service Oriented Architecture (SOA) holds promise for business agility since it allows business process to change to meet new customer demands or market needs without causing a cascade effect of changes in the underlying IT systems. Business rules are the instrument chosen to help business and IT to collaborate. In this paper, we propose the utilization of simulation models to model and simulate strategic business rules that are then disaggregated at different levels of an SOA architecture. Our proposal is aimed to help find a good configuration for strategic business objectives and IT parameters. The paper includes a case study where a simulation model is built to help business decision-making in a context where finding a good configuration for different business parameters and performance is too complex to analyze by trial and error.

  14. Complex networks theory for analyzing metabolic networks

    Institute of Scientific and Technical Information of China (English)

    ZHAO Jing; YU Hong; LUO Jianhua; CAO Z.W.; LI Yixue

    2006-01-01

    One of the main tasks of post-genomic informatics is to systematically investigate all molecules and their interactions within a living cell so as to understand how these molecules and the interactions between them relate to the function of the organism,while networks are appropriate abstract description of all kinds of interactions. In the past few years, great achievement has been made in developing theory of complex networks for revealing the organizing principles that govern the formation and evolution of various complex biological, technological and social networks. This paper reviews the accomplishments in constructing genome-based metabolic networks and describes how the theory of complex networks is applied to analyze metabolic networks.

  15. Analyzing and forecasting the European social climate

    Directory of Open Access Journals (Sweden)

    Liliana DUGULEANĂ

    2015-06-01

    Full Text Available The paper uses the results of the sample survey Eurobarometer, which has been requested by the European Commission. The social climate index is used to measure the level of perceptions of population by taking into account their personal situation and their perspective at national level. The paper makes an analysis of the evolution of social climate indices for the countries of European Union and offers information about the expectations of population of analyzed countries. The obtained results can be compared with the forecasting of Eurobarometer, on short term of one year and medium term of five years. Modelling the social climate index and its influence factors offers useful information about the efficiency of social protection and inclusion policies.

  16. Composite blade structural analyzer (COBSTRAN) user's manual

    Science.gov (United States)

    Aiello, Robert A.

    1989-01-01

    The installation and use of a computer code, COBSTRAN (COmposite Blade STRuctrual ANalyzer), developed for the design and analysis of composite turbofan and turboprop blades and also for composite wind turbine blades was described. This code combines composite mechanics and laminate theory with an internal data base of fiber and matrix properties. Inputs to the code are constituent fiber and matrix material properties, factors reflecting the fabrication process, composite geometry and blade geometry. COBSTRAN performs the micromechanics, macromechanics and laminate analyses of these fiber composites. COBSTRAN generates a NASTRAN model with equivalent anisotropic homogeneous material properties. Stress output from NASTRAN is used to calculate individual ply stresses, strains, interply stresses, thru-the-thickness stresses and failure margins. Curved panel structures may be modeled providing the curvature of a cross-section is defined by a single value function. COBSTRAN is written in FORTRAN 77.

  17. Composite Blade Structural Analyzer (COBSTRAN) demonstration manual

    Science.gov (United States)

    Aiello, Robert A.

    1989-01-01

    The input deck setup is described for a computer code, composite blade structural analyzer (COBSTRAN) which was developed for the design and analysis of composite turbofan and turboprop blades and also for composite wind turbine blades. This manual is intended for use in conjunction with the COBSTRAN user's manual. Seven demonstration problems are described with pre- and postprocessing input decks. Modeling of blades which are solid thru-the-thickness and also aircraft wing airfoils with internal spars is shown. Corresponding NASTRAN and databank input decks are also shown. Detail descriptions of each line of the pre- and post-processing decks is provided with reference to the Card Groups defined in the user's manual. A dictionary of all program variables and terms used in this manual may be found in Section 6 of the user's manual.

  18. A calibration free vector network analyzer

    Science.gov (United States)

    Kothari, Arpit

    Recently, two novel single-port, phase-shifter based vector network analyzer (VNA) systems were developed and tested at X-band (8.2--12.4 GHz) and Ka-band (26.4--40 GHz), respectively. These systems operate based on electronically moving the standing wave pattern, set up in a waveguide, over a Schottky detector and sample the standing wave voltage for several phase shift values. Once this system is fully characterized, all parameters in the system become known and hence theoretically, no other correction (or calibration) should be required to obtain the reflection coefficient, (Gamma), of an unknown load. This makes this type of VNA "calibration free" which is a significant advantage over other types of VNAs. To this end, a VNA system, based on this design methodology, was developed at X-band using several design improvements (compared to the previous designs) with the aim of demonstrating this "calibration-free" feature. It was found that when a commercial VNA (HP8510C) is used as the source and the detector, the system works as expected. However, when a detector is used (Schottky diode, log detector, etc.), obtaining correct Gamma still requires the customary three-load calibration. With the aim of exploring the cause, a detailed sensitivity analysis of prominent error sources was performed. Extensive measurements were done with different detection techniques including use of a spectrum analyzer as power detector. The system was tested even for electromagnetic compatibility (EMC) which may have contributed to this issue. Although desired results could not be obtained using the proposed standing-wave-power measuring devices like the Schottky diode but the principle of "calibration-free VNA" was shown to be true.

  19. Real-Time IPMI Protocol Analyzer

    CERN Document Server

    Kozak, T; Makowski, D

    2011-01-01

    The Advanced Telecommunications Computing Ar- chitecture (ATCA) is a modern platform, which gains popularity, not only in telecommunication, but also in others fields like High Energy Physics (HEP) experiments. Computing systems based on ATCA provide high performance and efficiency and are char- acterized by significant reliability, availability and serviceability. ATCA offers these features because of an integrated manage- ment system realized by the Intelligent Platform Management Interface (IPMI) implemented on dedicated Intelligent Platform Management Controller (IPMC). IPMC is required on each ATCA board to fulfill the ATCA standard and is responsible for many vital procedures performed to support proper operation of ATCA system. It covers, among others, activation and deactivations of modules, monitoring of actual parameters or controlling fans. The commercially available IPMI implementations are expensive and often not suited to demands of specific ATCA applications and available hardware. Thus, many r...

  20. Analyzing factors Affecting Consumers’ Attitude & Intention to Purchase Counterfeit products of luxury Brands In clothing Industry

    Directory of Open Access Journals (Sweden)

    Abdolhamid Ebrahimi

    2012-01-01

    Full Text Available One of the world trends growing alarmingly is Producing, distributing & Consuming counterfeit goods of Credible & luxury brands & one of the industries facing this crisis increasingly is clothing industry. Based on this, the present study aims to analyze & identify factors influencing Consumers’ attitude toward counterfeit products & intention to purchase such products in clothing industry that has been done in Sari, Mazandaran. And in it, these Factors effect on attitude toward counterfeit products & then the impact of attitude toward counterfeit products on intention to buy such products have been measured. The study method is a Survey type & in order to collect study data, a questionnaire designed with a combination of different available resources in literature has been used. To achieve the study goals, 384 individuals who purchased counterfeit products intentionally were chosen from Sari. To analyze data & test hypotheses, Study model & questionnaire, Cronbach's alpha coefficient tests, Structural Equations Modeling (SEM, Confirmatory Factorial Analysis (CFA & one-way Variance analysis (ANONA have been applied & two Software Packages SPSS & LISREL were used. Through reviewing the literature available & analyzing experts’ views, generally, 11 variables have been identified: Personal gratification, Value consciousness, Price–quality inference, Social Effect, Brand prestige, Brand Loyalty, Ethical Issues, Risk averseness, Subjective norm, perceived risk, Brand consciousness, as the influencing factors on attitude toward counterfeit products. Study Findings have indicated that the factors as Personal gratification, Value consciousness, Price–quality inference, Social Effect, Ethical Issues, Subjective norm, perceived risk, Brand consciousness, have meaningful effect on attitude to counterfeit products & the impact of Brand prestige, Brand Loyalty, Risk averseness, was not meaningfull on view about counterfeit products. Besides, the

  1. Analyzing factors Affecting Consumers’ Attitude & Intention to Purchase Counterfeit products of luxury Brands In clothing Industry

    Directory of Open Access Journals (Sweden)

    abdolhamid ebrahimi

    2012-12-01

    Full Text Available One of the world trends growing alarmingly is Producing, distributing & Consuming counterfeit goods of Credible & luxury brands & one of the industries facing this crisis increasingly is clothing industry. Based on this, the present study aims to analyze & identify factors influencing Consumers’ attitude toward counterfeit products & intention to purchase such products in clothing industry that has been done in Sari, Mazandaran. And in it, these Factors effect on attitude toward counterfeit products & then the impact of attitude toward counterfeit products on intention to buy such products have been measured. The study method is a Survey type & in order to collect study data, a questionnaire designed with a combination of different available resources in literature has been used. To achieve the study goals, 384 individuals who purchased counterfeit products intentionally were chosen from Sari. To analyze data & test hypotheses, Study model & questionnaire, Cronbach's alpha coefficient tests, Structural Equations Modeling (SEM, Confirmatory Factorial Analysis (CFA & one-way Variance analysis (ANONA have been applied & two Software Packages SPSS & LISREL were used. Through reviewing the literature available & analyzing experts’ views, generally, 11 variables have been identified: Personal gratification, Value consciousness, Price–quality inference, Social Effect, Brand prestige, Brand Loyalty, Ethical Issues, Risk averseness, Subjective norm, perceived risk, Brand consciousness, as the influencing factors on attitude toward counterfeit products. Study Findings have indicated that the factors as Personal gratification, Value consciousness, Price–quality inference, Social Effect, Ethical Issues, Subjective norm, perceived risk, Brand consciousness, have meaningful effect on attitude to counterfeit products & the impact of Brand prestige, Brand Loyalty, Risk averseness, was not meaningfull on view about counterfeit products. Besides, the

  2. Comparison of two dry chemistry analyzers and a wet chemistry analyzer using canine serum.

    Science.gov (United States)

    Lanevschi, Anne; Kramer, John W.

    1996-01-01

    Canine serum was used to compare seven chemistry analytes on two tabletop clinical dry chemistry analyzers, Boehringer's Reflotron and Kodak's Ektachem. Results were compared to those obtained on a wet chemistry reference analyzer, Roche Diagnostic's Cobas Mira. Analytes measured were urea nitrogen (BUN), creatinine, glucose, aspartate aminotransferase (AST), alanine aminotransferase (ALT), cholesterol and bilirubin. Nine to 12 canine sera with values in the low, normal, and high range were evaluated. The correlations were acceptable for all comparisons with correlation coefficients greater than 0.98 for all analytes. Regression analysis resulted in significant differences for both tabletop analyzers when compared to the reference analyzer for cholesterol and bilirubin, and for glucose and AST on the Kodak Ektachem. Differences appeared to result from proportional systematic error occurring at high analyte concentrations.

  3. PSAIA – Protein Structure and Interaction Analyzer

    Directory of Open Access Journals (Sweden)

    Vlahoviček Kristian

    2008-04-01

    Full Text Available Abstract Background PSAIA (Protein Structure and Interaction Analyzer was developed to compute geometric parameters for large sets of protein structures in order to predict and investigate protein-protein interaction sites. Results In addition to most relevant established algorithms, PSAIA offers a new method PIADA (Protein Interaction Atom Distance Algorithm for the determination of residue interaction pairs. We found that PIADA produced more satisfactory results than comparable algorithms implemented in PSAIA. Particular advantages of PSAIA include its capacity to combine different methods to detect the locations and types of interactions between residues and its ability, without any further automation steps, to handle large numbers of protein structures and complexes. Generally, the integration of a variety of methods enables PSAIA to offer easier automation of analysis and greater reliability of results. PSAIA can be used either via a graphical user interface or from the command-line. Results are generated in either tabular or XML format. Conclusion In a straightforward fashion and for large sets of protein structures, PSAIA enables the calculation of protein geometric parameters and the determination of location and type for protein-protein interaction sites. XML formatted output enables easy conversion of results to various formats suitable for statistic analysis. Results from smaller data sets demonstrated the influence of geometry on protein interaction sites. Comprehensive analysis of properties of large data sets lead to new information useful in the prediction of protein-protein interaction sites.

  4. Toward Integrated μNetwork Analyzer

    Science.gov (United States)

    Kmec, M.; Helbig, M.; Herrmann, R.; Rauschenbach, P.; Sachs, J.; Schilling, K.

    The article deals with recent development steps toward monolithically integrated micro-Network Analyzer (μNA). The device will deploy M-Sequence-based single-chip transceivers with a built-in ultra-wideband wave separation unit in the receiver chains. The introduced on-chip wideband wave separation is realized using an optimized resistive directional coupler combined with a customized differential LNA as detector. The wave separation works almost down to DC, and its upper frequency limit is determined by the performance of the implemented technology (i.e., bridge resistors, transistors, etc.), the selected circuit topology, and the wirings of particular coupler components but also by the IC packaging itself. Even though the upper limit is designed to be compatible with the analog input bandwidth of the receiver circuit [which is about 18 GHz for naked die (Kmec et al., M-Sequence based single chip UWB-radar sensor. ANTEM/AMEREM 2010 Conference, Ottawa, 2010)], the packaged IC is intended for use up to 8 GHz. Finally, the discussed transceiver is a further development of the mother SiGe System-on-Chip (SoC) presented in the work cited above.

  5. Analyzing Music Services Positioning Through Qualitative Research

    Directory of Open Access Journals (Sweden)

    Manuel Cuadrado

    2015-12-01

    Full Text Available Information technologies have produced new ways of distributing and consuming music, mainly by youth, in relation to both goods and services. In the case of goods, there has been a dramatic shift from traditional ways of buying and listening to music to new digital platforms. There has also been an evolution in relation to music services. In this sense, live music concerts have been losing their audiences over the past few years, as have music radio stations, in favor of streaming platforms. Curious about this phenomenon, we conducted an exploratory research in order to analyze how all these services, both traditional and new ones were perceived. Specifically, we aimed to study youth´s assessment of the three most relevant music service categories: music radio stations, digital streaming platforms, and pop-rock music festivals. To do so, we used the projective technique of image association to gather information. The population of the study consisted of individuals between 18 and 25 years of age. Our results, after using content analysis, were poor due to spontaneous recall. Therefore, we duplicated the study, but in a more focus-oriented way. Information gathered this time allowed us not only to better know how all these organizations are positioned but also to obtain a list of descriptors to be used in a subsequent descriptive research study.

  6. The model JSR-12 neutron coincidence analyzer

    International Nuclear Information System (INIS)

    This paper reports that one of the ways in which non-destructive assays for nuclear materials is made involved counting the neutron signatures which result from spontaneous or induced fissions in fissile materials. A major problem in determining the number of fission neutrons is trying to separate them from the background of neutrons arising from alpha particle interactions with lighter nuclei in the matrix materials of the samples being assayed. The JSR-12 neutron coincidence analyzer operates on the principle that fission neutrons occur in multiples of two or more, whereas background neutrons occur randomly as single events. By exploiting this time correlation difference, the JSR-12 can determine the fission neutron signal. This instrument represents a considerable upgrade from the industry standard JSR-11, by doubling the response speed and adding complete computer control of all functions, as well as employing non-volatile memory for data storage. Operation has been simplified for field use by using an LCD display to guide the operator in setting up assay parameters, and by time-date tagging all assays for later retrieval

  7. NRC plant-analyzer development at BNL

    International Nuclear Information System (INIS)

    The objective of this program is to develop an LWR engineering plant analyzer capable of performing realistic and accurate simulations of plant transients and Small-Break Loss of Coolant Accidents at real-time and faster than real-time computing speeds and at low costs for preparing, executing and evaluating such simulations. The program is directed toward facilitating reactor safety analyses, on-line plant monitoring, on-line accident diagnosis and mitigation and toward improving reactor operator training. The AD10 of Applied Dynamics International, Ann Arbor, MI, a special-purpose peripheral processor for high-speed systems simulation, is programmed through a PDP-11/34 minicomputer and carries out digital simulations with analog hardware in the input/output loop (up to 256 channels). Analog signals from a control panel are being used now to activate or to disable valves and to trip pump drive motors or regulators without interrupting the simulation. An IBM personal computer with multicolor graphics capabilities and a CRT monitor are used to produce on-line labelled diagrams of selected plant parameters as functions of time

  8. Qualitative Methodology in Analyzing Educational Phenomena

    Directory of Open Access Journals (Sweden)

    Antonio SANDU

    2010-12-01

    Full Text Available Semiological analysis of educational phenomena allow researchers access to a multidimensional universe of meanings that is represented by the school, not so much seen as an institution, but as a vector of social action through educational strategies. We consider education as a multidimensional phenomenon since its analysis allows the researcher to explore a variety of research hypotheses of different paradigmatic perspectives that converge in an educational finality. According to the author Simona Branc one of the most appropriate methods used in qualitative data analysis is Grounded Theory; this one assumes a systematic process of generating concepts and theories based on the data collected. Specialised literature defines Grounded Theory as an inductive approach that starts with general observations and during the analytical process creates conceptual categories that explain the theme explored. Research insist on the role of the sociologic theory of managing the research data and for providing ways of conceptualizing the descriptions and explanations.Qualitative content analysis is based on the constructivist paradigm (constructionist in the restricted sense that we used previously. It aims to create an “understanding of the latent meanings of the analyzed messages”. Quantitative content analysis involves a process of encoding and statistical analysis of data extracted from the content of the paper in the form of extractions like: frequencies, contingency analysis, etc

  9. Analyzing Spatiotemporal Anomalies through Interactive Visualization

    Directory of Open Access Journals (Sweden)

    Tao Zhang

    2014-06-01

    Full Text Available As we move into the big data era, data grows not just in size, but also in complexity, containing a rich set of attributes, including location and time information, such as data from mobile devices (e.g., smart phones, natural disasters (e.g., earthquake and hurricane, epidemic spread, etc. We are motivated by the rising challenge and build a visualization tool for exploring generic spatiotemporal data, i.e., records containing time location information and numeric attribute values. Since the values often evolve over time and across geographic regions, we are particularly interested in detecting and analyzing the anomalous changes over time/space. Our analytic tool is based on geographic information system and is combined with spatiotemporal data mining algorithms, as well as various data visualization techniques, such as anomaly grids and anomaly bars superimposed on the map. We study how effective the tool may guide users to find potential anomalies through demonstrating and evaluating over publicly available spatiotemporal datasets. The tool for spatiotemporal anomaly analysis and visualization is useful in many domains, such as security investigation and monitoring, situation awareness, etc.

  10. Signal processing and analyzing works of art

    Science.gov (United States)

    Johnson, Don H.; Johnson, C. Richard, Jr.; Hendriks, Ella

    2010-08-01

    In examining paintings, art historians use a wide variety of physico-chemical methods to determine, for example, the paints, the ground (canvas primer) and any underdrawing the artist used. However, the art world has been little touched by signal processing algorithms. Our work develops algorithms to examine x-ray images of paintings, not to analyze the artist's brushstrokes but to characterize the weave of the canvas that supports the painting. The physics of radiography indicates that linear processing of the x-rays is most appropriate. Our spectral analysis algorithms have an accuracy superior to human spot-measurements and have the advantage that, through "short-space" Fourier analysis, they can be readily applied to entire x-rays. We have found that variations in the manufacturing process create a unique pattern of horizontal and vertical thread density variations in the bolts of canvas produced. In addition, we measure the thread angles, providing a way to determine the presence of cusping and to infer the location of the tacks used to stretch the canvas on a frame during the priming process. We have developed weave matching software that employs a new correlation measure to find paintings that share canvas weave characteristics. Using a corpus of over 290 paintings attributed to Vincent van Gogh, we have found several weave match cliques that we believe will refine the art historical record and provide more insight into the artist's creative processes.

  11. Analyzing modified unimodular gravity via Lagrange multipliers

    Science.gov (United States)

    Sáez-Gómez, Diego

    2016-06-01

    The so-called unimodular version of general relativity is revisited. Unimodular gravity is constructed by fixing the determinant of the metric, which leads to the trace-free part of the equations instead of the usual Einstein field equations. Then a cosmological constant naturally arises as an integration constant. While unimodular gravity turns out to be equivalent to general relativity (GR) at the classical level, it provides important differences at the quantum level. Here we extend the unimodular constraint to some extensions of general relativity that have drawn a lot of attention over the last years—f (R ) gravity (or its scalar-tensor picture) and Gauss-Bonnet gravity. The corresponding unimodular version of such theories is constructed as well as the conformal transformation that relates the Einstein and Jordan frames for these nonminimally coupled theories. From the classical point of view, the unimodular versions of such extensions are completely equivalent to their originals, but an effective cosmological constant arises naturally, which may provide a richer description of the evolution of the Universe. Here we analyze the case of Starobisnky inflation and compare it with the original one.

  12. Complete denture analyzed by optical coherence tomography

    Science.gov (United States)

    Negrutiu, Meda L.; Sinescu, Cosmin; Todea, Carmen; Podoleanu, Adrian G.

    2008-02-01

    The complete dentures are currently made using different technologies. In order to avoid deficiencies of the prostheses made using the classical technique, several alternative systems and procedures were imagined, directly related to the material used and also to the manufacturing technology. Thus, at the present time, there are several injecting systems and technologies on the market, that use chemoplastic materials, which are heat cured (90-100°C), in dry or wet environment, or cold cured (below 60°C). There are also technologies that plasticize a hard cured material by thermoplastic processing (without any chemical changes) and then inject it into a mold. The purpose of this study was to analyze the existence of possible defects in several dental prostheses using a non invasive method, before their insertion in the mouth. Different dental prostheses, fabricated from various materials were investigated using en-face optical coherence tomography. In order to discover the defects, the scanning was made in three planes, obtaining images at different depths, from 0,01 μm to 2 mm. In several of the investigated prostheses we found defects which may cause their fracture. These defects are totally included in the prostheses material and can not be vizualised with other imagistic methods. In conclusion, en-face OCT is an important investigative tool for the dental practice.

  13. Analyzing Contents of a Computer Cache

    Science.gov (United States)

    Beahan, John; Khanoyan, Garen; Some, Raphael; Callum, Leslie

    2004-01-01

    The Cache Contents Estimator (CCE) is a computer program that provides information on the contents of level-1 cache of a PowerPC computer. The CCE is configurable to enable simulation of any processor in the PowerPC family. The need for CCE arises because the contents of level-1 caches are not available to either hardware or software readout mechanisms, yet information on the contents is crucial in the development of fault-tolerant or highly available computing systems and for realistic modeling and prediction of computing- system performance. The CCE comprises two independent subprograms: (1) the Dynamic Application Address eXtractor (DAAX), which extracts the stream of address references from an application program undergoing execution and (2) the Cache Simulator (CacheSim), which models the level-1 cache of the processor to be analyzed, by mimicking what the cache controller would do, in response to the address stream from DAAX. CacheSim generates a running estimate of the contents of the data and the instruction subcaches of the level-1 cache, hit/miss ratios, the percentage of cache that contains valid or active data, and time-stamped histograms of the cache content.

  14. Analyzing Consumer Behavior Towards Contemporary Food Retailers

    Directory of Open Access Journals (Sweden)

    E.Dursun

    2008-01-01

    Full Text Available The objective of this research is analyzing consumer behaviors towards to contemporary food retailers. Food retailing has been changing during recent years in Turkey. Foreign investors captivated with this market potential of food retailing. Retailer‟s format has been changed and featuring large-scale, extended product variety and full service retailers spreading rapidly through the nation-wide. Consumers‟ tend to shop their household needs from contemporary retailers due mainly to urbanism, increasing women workforce and income growth. In this research, original data collected through face-to-face interview from 385 respondents which are located in Istanbul. Different Socio-Economic Status (SES groups‟ ratio for Istanbul was forming sampling distribution. Consumers prefer closest food retailers which are mainly purchasing food products. Consumers purchase more than their planned what their needs; especially C SES group average comes first for the spending money for unplanned shopping. Chain stores and hypermarkets are the most preferred retailers in food purchasing. Moreover, consumer responses to judgments related to retailing are being investigating with factor analysis.

  15. Extraction of Root Words using Morphological Analyzer for Devanagari Script

    Directory of Open Access Journals (Sweden)

    Sharvari S. Govilkar

    2016-01-01

    Full Text Available In India, more than 300 million people use Devanagari script for documentation. In Devanagari script, Marathi and Hindi are mainly used as primary language of Maharashtra state and national language of India respectively. As compared with English script, Devanagari script is reach of morphemes. Thus the lemmatization of Devanagari script is quite complex than that of English script. There is lack of resources for Devanagari script such as WordNet, ontology representation, parsing the keywords and their part of speech. Thus the overall task of information retrieval becomes complex and time consuming. Devanagari script document always carries suffixes which may cause problem in accurate information retrieval. We propose a method of extracting root words from Devanagari script document which can be used for information retrieval, text summarization, text categorization, ontology building etc. An attempt is made to design the Morphological Analyzer for Devanagari script. We have designed CORPUS containing more than 3000 possible stop words and suffixes for Marathi language. Morphological Analyzer can acts as a preliminary stage for developing any information retrieval application in Devanagari script. We have conducted the experiments on randomly selected Marathi documents and we found the accuracy of designed morphological analyzer is up to 96%.

  16. Mid-Infrared Laser Beam Diagnostic Wavefront Analyzer

    Science.gov (United States)

    Goranson, Rex; Blea, Joe; Chipps, Art; Denton, Grant; Houchard, Jeff

    1988-08-01

    The Rockwell Wavefront Analyzer (RWA) is an integrated beam diagnostic tool developed for the US Army, STEWS, WSMR, for the MIRACL device. It accepts a 2.5 cm square nominally collimated DF laser beam input of approximately 5 W power level. The electrical signals are reduced and analyzed by an on-line computer processor. The ultimate outputs are plots including total beam power and angular jitter in the x and y axes, an irradiance map of the beam on a 32 X 32 square grid, and a wavefront map of the beam on the same grid. Wavefront aberration poly-nomial coefficient listings are also generated. The wavefront is obtained from measurements of its local slope in two axes by means of a classical Hartmann test done by scanning the pupil with holes in a rotating drum. Earlier versions of this instrument we called SHAPE, for Scanning Hartmann Analyzer Plate Experiment. This design would be SHAPE IV. A single indium antimonide photopot detector measures the transverse ray aberrations, which are then subjected to elaborate processing to extract the polynomial wavefront coefficients. Another photopot is the jitter sensor. Each photopot measures power to normalize the X and Y signals; these "Z" signals also provide the beam power and local irradiance signals.

  17. The Mercury Electron Analyzers for the Bepi Colombo mission

    Science.gov (United States)

    Sauvaud, J.-A.; Fedorov, A.; Aoustin, C.; Seran, H.-C.; Le Comte, E.; Petiot, M.; Rouzaud, J.; Saito, Y.; Dandouras, J.; Jacquey, C.; Louarn, P.; Mazelle, C.; Médale, J.-L.

    2010-11-01

    Bepi Colombo is a joint mission between ESA and JAXA that is scheduled for launch in 2014 and arrival at Mercury in 2020. A comprehensive set of particle sensors will be flown onboard the two probes that form Bepi Colombo. These sensors will allow a detailed investigation of the structure and dynamics of the charged particle environment at Mercury. Onboard the Mercury Magnetospheric Orbiter (MMO) the Mercury Electron Analyzers (MEA) sensors constitute the experiment dedicated to fast electron measurements between 3 and 25,500 eV. They consist of two top-hat electrostatic analyzers for angle-energy analysis followed by microchannel plate multipliers and collecting anodes. A notable and new feature of MEA is that the transmission factor of each analyzer can be varied in-flight electronically by a factor reaching up to 100, thus allowing to largely increasing the dynamical range of the experiment. This capability is of importance at Mercury where large changes of electron fluxes are expected from the solar wind to the various regions of the Mercury magnetosphere. While the first models are being delivered to JAXA, an engineering model has been tested and proven to fulfill the expectations about geometrical factor reduction and energy-angular transmission characteristics. Taking advantage of the spacecraft rotation with a 4 s period, MEA will provide fast three-dimensional distribution functions of magnetospheric electrons, from energies of the solar wind and exospheric populations (a few eVs) up to the plasma sheet energy range (some tens of keV). The use of two sensors viewing perpendicular planes allows reaching a ¼ spin period time resolution, i.e., 1 s, to obtain a full 3D distribution.

  18. Measuring and Analyzing the Birds Flight

    Science.gov (United States)

    Friedl, Alexander; Kähler, Christian J.

    2012-11-01

    To tackle the long-standing problem of precisely measuring shape and profiling of free-flying birds we developed a technique to determine the shape of naturally textured surfaces. The measurement principle is based on a calibrated stereoscopic camera setup that delivers the height information through the identification of characteristic texture elements in each concurrent camera image using highly developed optical flow algorithms. This allows estimating the motion and height information of each pixel based on the analysis over time. The reconstructed upper surface of the wing is calculated in temporal coherence with the whole image sequence and hence shows low sensitivity to disturbances and high spatial accuracy and resolution. The measurement technique is used to evaluate experimental data obtained within measurement campaigns with two freely flying birds. The slowly, but silently flying barn owl was chosen in contrast to the fast and agile flying lanner falcon. The experiments were carried out within two facilities to respect the different flying performances of the animals and allow for as little disturbances as possible and feasible. Details of the experimental campaigns as well as the measurement methodology will be illustrated during the presentation.

  19. ANALYZING MANAGERS’ PERCEPTION OF CREATIVITY IN TOURISM

    Directory of Open Access Journals (Sweden)

    Anamaria Sidonia RĂVAR

    2014-12-01

    Full Text Available The past decades brought new meanings to creativity as the decline of mass tourism created impetus for the emergence of creative behavior as a major source of competitive advantage in the tourism industry. This led, in turn, to the development of a new type of tourism – creative tourism – which translates into new products and services, new collaboration and partnership structures, new forms of organization and ultimately into new experiences for consumers of tourism services. However, there is still no consensus on how creativity manifests itself in tourism and how it can be encouraged in order to generate value-added for the customers. To this aim, a qualitative research was carried out, based on a structured interview applied to managers of tourism operators from various segments of the tourism value chain. Results reveal the differences in approach to encourage creativity among employees, bring value-added to the customers through creative services, and build a culture based on creative behavior and practices.

  20. Analyzing Math and Science Pre-Service Teachers School Experience Course Journals Shared in Web-Based Platforms [Web Destekli Ortamlarda Fen ve Matematik Öğretmen Adaylarının Paylaştıkları Öğretmenlik Uygulaması Günlüklerinin İncelenmesi

    Directory of Open Access Journals (Sweden)

    Didem İnel Ekici

    2016-08-01

    Full Text Available In this study, we aimed to investigate pre-service math and science teachers during teaching practicum course by analyzing daily journals shared in a web-based environment. 65 seniors participated in the study (41 pre-service math teachers and 24 pre-service science teachers. Within qualitative case study approach, the study focused on descriptive and content analysis during the data analysis. By looking at the findings of the study, pre-service math teachers provided more details in discussing the teaching methods and emphasizing on lesson preparations compared to pre-service science teachers. On the other hand, pre-service science teachers included more specific activity examples than did pre-service math teachers in their daily journal entries. Another important finding of the study showed that pre-service teachers tended to evaluate themselves and their friends positively, but negatively criticized their teachers. In light of these findings, we recommend offering teaching practicum course when pre-service teachers take their theoretical courses. [Bu araştırmada fen ve matematik öğretmen adaylarının “öğretmenlik uygulaması” dersi kapsamında web destekli ortamlarda paylaştıkları günlüklerin incelenmesi amaçlanmıştır. Araştırmaya dördüncü sınıfta öğrenim görmekte olan 65 öğretmen adayı katılmıştır (24 Fen öğretmen adayı ve 41 Matematik öğretmen adayı. Nitel verilere dayalı bir durum çalışması olan araştırma verilerinin analizinde betimsel analiz ve içerik analizi yöntemleri kullanılmıştır. Araştırma bulguları incelendiğinde, öğrenme sürecinde kullanılan öğretim yöntemlerini değerlendirme ve ders öncesi hazırlıkları vurgulama konularında matematik öğretmen adaylarının günlüklerinde, fen öğretmen adaylarından daha detaylı bilgiler sundukları belirlenmiştir. Buna karşılık fen öğretmen adayları günlüklerinde, matematik öğretmen adaylarından daha fazla

  1. Climate Model Diagnostic Analyzer Web Service System

    Science.gov (United States)

    Lee, S.; Pan, L.; Zhai, C.; Tang, B.; Kubar, T. L.; Li, J.; Zhang, J.; Wang, W.

    2015-12-01

    Both the National Research Council Decadal Survey and the latest Intergovernmental Panel on Climate Change Assessment Report stressed the need for the comprehensive and innovative evaluation of climate models with the synergistic use of global satellite observations in order to improve our weather and climate simulation and prediction capabilities. The abundance of satellite observations for fundamental climate parameters and the availability of coordinated model outputs from CMIP5 for the same parameters offer a great opportunity to understand and diagnose model biases in climate models. In addition, the Obs4MIPs efforts have created several key global observational datasets that are readily usable for model evaluations. However, a model diagnostic evaluation process requires physics-based multi-variable comparisons that typically involve large-volume and heterogeneous datasets, making them both computationally- and data-intensive. In response, we have developed a novel methodology to diagnose model biases in contemporary climate models and implementing the methodology as a web-service based, cloud-enabled, provenance-supported climate-model evaluation system. The evaluation system is named Climate Model Diagnostic Analyzer (CMDA), which is the product of the research and technology development investments of several current and past NASA ROSES programs. The current technologies and infrastructure of CMDA are designed and selected to address several technical challenges that the Earth science modeling and model analysis community faces in evaluating and diagnosing climate models. In particular, we have three key technology components: (1) diagnostic analysis methodology; (2) web-service based, cloud-enabled technology; (3) provenance-supported technology. The diagnostic analysis methodology includes random forest feature importance ranking, conditional probability distribution function, conditional sampling, and time-lagged correlation map. We have implemented the

  2. Analyzing personalized policies for online biometric verification.

    Directory of Open Access Journals (Sweden)

    Apaar Sadhwani

    Full Text Available Motivated by India's nationwide biometric program for social inclusion, we analyze verification (i.e., one-to-one matching in the case where we possess similarity scores for 10 fingerprints and two irises between a resident's biometric images at enrollment and his biometric images during his first verification. At subsequent verifications, we allow individualized strategies based on these 12 scores: we acquire a subset of the 12 images, get new scores for this subset that quantify the similarity to the corresponding enrollment images, and use the likelihood ratio (i.e., the likelihood of observing these scores if the resident is genuine divided by the corresponding likelihood if the resident is an imposter to decide whether a resident is genuine or an imposter. We also consider two-stage policies, where additional images are acquired in a second stage if the first-stage results are inconclusive. Using performance data from India's program, we develop a new probabilistic model for the joint distribution of the 12 similarity scores and find near-optimal individualized strategies that minimize the false reject rate (FRR subject to constraints on the false accept rate (FAR and mean verification delay for each resident. Our individualized policies achieve the same FRR as a policy that acquires (and optimally fuses 12 biometrics for each resident, which represents a five (four, respectively log reduction in FRR relative to fingerprint (iris, respectively policies previously proposed for India's biometric program. The mean delay is [Formula: see text] sec for our proposed policy, compared to 30 sec for a policy that acquires one fingerprint and 107 sec for a policy that acquires all 12 biometrics. This policy acquires iris scans from 32-41% of residents (depending on the FAR and acquires an average of 1.3 fingerprints per resident.

  3. Novel topological descriptors for analyzing biological networks

    Directory of Open Access Journals (Sweden)

    Varmuza Kurt K

    2010-06-01

    Full Text Available Abstract Background Topological descriptors, other graph measures, and in a broader sense, graph-theoretical methods, have been proven as powerful tools to perform biological network analysis. However, the majority of the developed descriptors and graph-theoretical methods does not have the ability to take vertex- and edge-labels into account, e.g., atom- and bond-types when considering molecular graphs. Indeed, this feature is important to characterize biological networks more meaningfully instead of only considering pure topological information. Results In this paper, we put the emphasis on analyzing a special type of biological networks, namely bio-chemical structures. First, we derive entropic measures to calculate the information content of vertex- and edge-labeled graphs and investigate some useful properties thereof. Second, we apply the mentioned measures combined with other well-known descriptors to supervised machine learning methods for predicting Ames mutagenicity. Moreover, we investigate the influence of our topological descriptors - measures for only unlabeled vs. measures for labeled graphs - on the prediction performance of the underlying graph classification problem. Conclusions Our study demonstrates that the application of entropic measures to molecules representing graphs is useful to characterize such structures meaningfully. For instance, we have found that if one extends the measures for determining the structural information content of unlabeled graphs to labeled graphs, the uniqueness of the resulting indices is higher. Because measures to structurally characterize labeled graphs are clearly underrepresented so far, the further development of such methods might be valuable and fruitful for solving problems within biological network analysis.

  4. Understanding patient experience of out-of-hours general practitioner services in South Wales: a qualitative study.

    NARCIS (Netherlands)

    Egbunike, J.N.; Shaw, C.; Bale, S.; Elwyn, G.; Edwards, A.

    2008-01-01

    BACKGROUND: In the light of recent changes in the structure and provision of out-of-hours service in the UK, there is a need to re-assess the quality of care. One way to assess the quality of care is through patient experience. OBJECTIVES: This study aimed to explore patient expectations and help-se

  5. Climate Model Diagnostic Analyzer Web Service System

    Science.gov (United States)

    Lee, S.; Pan, L.; Zhai, C.; Tang, B.; Jiang, J. H.

    2013-12-01

    The latest Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report stressed the need for the comprehensive and innovative evaluation of climate models with newly available global observations. The traditional approach to climate model evaluation, which compares a single parameter at a time, identifies symptomatic model biases and errors but fails to diagnose the model problems. The model diagnosis process requires physics-based multi-variable comparisons that typically involve large-volume and heterogeneous datasets, making them both computationally- and data-intensive. To address these challenges, we are developing a parallel, distributed web-service system that enables the physics-based multi-variable model performance evaluations and diagnoses through the comprehensive and synergistic use of multiple observational data, reanalysis data, and model outputs. We have developed a methodology to transform an existing science application code into a web service using a Python wrapper interface and Python web service frameworks (i.e., Flask, Gunicorn, and Tornado). The web-service system, called Climate Model Diagnostic Analyzer (CMDA), currently supports (1) all the datasets from Obs4MIPs and a few ocean datasets from NOAA and Argo, which can serve as observation-based reference data for model evaluation and (2) many of CMIP5 model outputs covering a broad range of atmosphere, ocean, and land variables from the CMIP5 specific historical runs and AMIP runs. Analysis capabilities currently supported by CMDA are (1) the calculation of annual and seasonal means of physical variables, (2) the calculation of time evolution of the means in any specified geographical region, (3) the calculation of correlation between two variables, and (4) the calculation of difference between two variables. A web user interface is chosen for CMDA because it not only lowers the learning curve and removes the adoption barrier of the tool but also enables instantaneous use

  6. Climate Model Diagnostic Analyzer Web Service System

    Science.gov (United States)

    Lee, S.; Pan, L.; Zhai, C.; Tang, B.; Jiang, J. H.

    2014-12-01

    We have developed a cloud-enabled web-service system that empowers physics-based, multi-variable model performance evaluations and diagnoses through the comprehensive and synergistic use of multiple observational data, reanalysis data, and model outputs. We have developed a methodology to transform an existing science application code into a web service using a Python wrapper interface and Python web service frameworks. The web-service system, called Climate Model Diagnostic Analyzer (CMDA), currently supports (1) all the observational datasets from Obs4MIPs and a few ocean datasets from NOAA and Argo, which can serve as observation-based reference data for model evaluation, (2) many of CMIP5 model outputs covering a broad range of atmosphere, ocean, and land variables from the CMIP5 specific historical runs and AMIP runs, and (3) ECMWF reanalysis outputs for several environmental variables in order to supplement observational datasets. Analysis capabilities currently supported by CMDA are (1) the calculation of annual and seasonal means of physical variables, (2) the calculation of time evolution of the means in any specified geographical region, (3) the calculation of correlation between two variables, (4) the calculation of difference between two variables, and (5) the conditional sampling of one physical variable with respect to another variable. A web user interface is chosen for CMDA because it not only lowers the learning curve and removes the adoption barrier of the tool but also enables instantaneous use, avoiding the hassle of local software installation and environment incompatibility. CMDA will be used as an educational tool for the summer school organized by JPL's Center for Climate Science in 2014. In order to support 30+ simultaneous users during the school, we have deployed CMDA to the Amazon cloud environment. The cloud-enabled CMDA will provide each student with a virtual machine while the user interaction with the system will remain the same

  7. Science Opportunity Analyzer (SOA) Version 8

    Science.gov (United States)

    Witoff, Robert J.; Polanskey, Carol A.; Aguinaldo, Anna Marie A.; Liu, Ning; Hofstadter, Mark D.

    2013-01-01

    both JPL and the sponsoring spacecraft. SOA is able to ingest JPL SPICE Kernels that are used to drive the tool and its computations. A Percy search engine is then included that identifies interesting time periods for the user to build observations. When observations are then built, flight-like orientation algorithms replicate spacecraft dynamics to closely simulate the flight spacecraft s dynamics. SOA v8 represents large steps forward from SOA v7 in terms of quality, reliability, maintainability, efficiency, and user experience. A tailored agile development environment has been built around SOA that provides automated unit testing, continuous build and integration, a consolidated Web-based code and documentation storage environment, modern Java enhancements, and a focus on usability

  8. "Analyze, Acquire, Apply, and Write" as a New Learning Model in Science

    Science.gov (United States)

    Choe, Jeong V.

    2015-01-01

    I have developed a new teaching and learning model called AAAW, which stand for Analyze, Acquire, Apply and Write. This model grows from action research and unique experience in teaching a biochemistry course to high school students who are talented in math and science. In this model, students first "Analyze" lab data to generate…

  9. Experiments in computing: a survey.

    Science.gov (United States)

    Tedre, Matti; Moisseinen, Nella

    2014-01-01

    Experiments play a central role in science. The role of experiments in computing is, however, unclear. Questions about the relevance of experiments in computing attracted little attention until the 1980s. As the discipline then saw a push towards experimental computer science, a variety of technically, theoretically, and empirically oriented views on experiments emerged. As a consequence of those debates, today's computing fields use experiments and experiment terminology in a variety of ways. This paper analyzes experimentation debates in computing. It presents five ways in which debaters have conceptualized experiments in computing: feasibility experiment, trial experiment, field experiment, comparison experiment, and controlled experiment. This paper has three aims: to clarify experiment terminology in computing; to contribute to disciplinary self-understanding of computing; and, due to computing's centrality in other fields, to promote understanding of experiments in modern science in general.

  10. HMR Log Analyzer: Analyze Web Application Logs Over Hadoop MapReduce

    OpenAIRE

    Sayalee Narkhede; Tripti Baraskar

    2013-01-01

    In today’s Internet world, log file analysis is becoming a necessary task for analyzing the customer’sbehavior in order to improve advertising and sales as well as for datasets like environment, medical,banking system it is important to analyze the log data to get required knowledge from it. Web mining is theprocess of discovering the knowledge from the web data. Log files are getting generated very fast at therate of 1-10 Mb/s per machine, a single data center can generate tens of terabytes ...

  11. Analyzers Measure Greenhouse Gases, Airborne Pollutants

    Science.gov (United States)

    2012-01-01

    In complete darkness, a NASA observatory waits. When an eruption of boiling water billows from a nearby crack in the ground, the observatory s sensors seek particles in the fluid, measure shifts in carbon isotopes, and analyze samples for biological signatures. NASA has landed the observatory in this remote location, far removed from air and sunlight, to find life unlike any that scientists have ever seen. It might sound like a scene from a distant planet, but this NASA mission is actually exploring an ocean floor right here on Earth. NASA established a formal exobiology program in 1960, which expanded into the present-day Astrobiology Program. The program, which celebrated its 50th anniversary in 2010, not only explores the possibility of life elsewhere in the universe, but also examines how life begins and evolves, and what the future may hold for life on Earth and other planets. Answers to these questions may be found not only by launching rockets skyward, but by sending probes in the opposite direction. Research here on Earth can revise prevailing concepts of life and biochemistry and point to the possibilities for life on other planets, as was demonstrated in December 2010, when NASA researchers discovered microbes in Mono Lake in California that subsist and reproduce using arsenic, a toxic chemical. The Mono Lake discovery may be the first of many that could reveal possible models for extraterrestrial life. One primary area of interest for NASA astrobiologists lies with the hydrothermal vents on the ocean floor. These vents expel jets of water heated and enriched with chemicals from off-gassing magma below the Earth s crust. Also potentially within the vents: microbes that, like the Mono Lake microorganisms, defy the common characteristics of life on Earth. Basically all organisms on our planet generate energy through the Krebs Cycle, explains Mike Flynn, research scientist at NASA s Ames Research Center. This metabolic process breaks down sugars for energy

  12. Using Simulation to Analyze Acoustic Environments

    Science.gov (United States)

    Wood, Eric J.

    2016-01-01

    One of the main projects that was worked on this semester was creating an acoustic model for the Advanced Space Suit in Comsol Multiphysics. The geometry tools built into the software were used to create an accurate model of the helmet and upper torso of the suit. After running the simulation, plots of the sound pressure level within the suit were produced, as seen below in Figure 1. These plots show significant nulls which should be avoided when placing microphones inside the suit. In the future, this model can be easily adapted to changes in the suit design to determine optimal microphone placements and other acoustic properties. Another major project was creating an acoustic diverter that will potentially be used to route audio into the Space Station's Node 1. The concept of the project was to create geometry to divert sound from a neighboring module, the US Lab, into Node 1. By doing this, no new audio equipment would need to be installed in Node 1. After creating an initial design for the diverter, analysis was performed in Comsol in order to determine how changes in geometry would affect acoustic performance, as shown in Figure 2. These results were used to produce a physical prototype diverter on a 3D printer. With the physical prototype, testing was conducted in an anechoic chamber to determine the true effectiveness of the design, as seen in Figure 3. The results from this testing have been compared to the Comsol simulation results to analyze how closely the Comsol results are to real-world performance. While the Comsol results do not seem to closely resemble the real world performance, this testing has provided valuable insight into how much trust can be placed in the results of Comsol simulations. A final project that was worked on during this tour was the Audio Interface Unit (AIU) design for the Orion program. The AIU is a small device that will be used for as an audio communication device both during launch and on-orbit. The unit will have functions

  13. ICAN - INTEGRATED COMPOSITE ANALYZER (IBM PC VERSION)

    Science.gov (United States)

    Murthy, P. L.

    1994-01-01

    The Integrated Composite Analyzer (ICAN) is a computer program designed to carry out a comprehensive linear analysis of multilayered fiber composites. The analysis contains the essential features required to effectively design structural components made from fiber composites. ICAN includes the micromechanical design features of the Intraply Hybrid Composite Design (INHYD) program to predict ply level hygral, thermal, and mechanical properties. The laminate analysis features of the Multilayered Filamentary Composite Analysis (MFCA) program are included to account for interply layer effects. ICAN integrates these and additional features to provide a comprehensive analysis capability for composite structures. Additional features unique to ICAN include the following: 1) ply stress-strain influence coefficients, 2) microstresses and microstrain influence coefficients, 3) concentration factors around a circular hole, 4) calculation of probable delamination locations around a circular hole, 5) Poisson's ratio mismatch details near a straight edge, 6) free-edge stresses, 7) material card input for finite element analysis using NASTRAN (available separately from COSMIC) or MARC, 8) failure loads based on maximum stress criterion, and laminate failure stresses based on first-ply failures and fiber breakage criteria, 9) transverse shear stresses, normal and interlaminar stresses, and 10) durability/fatigue type analyses for thermal as well as mechanical cyclic loads. The code can currently assess degradation due to mechanical and thermal cyclic loads with or without a defect. ICAN includes a dedicated data bank of constituent material properties, and allows the user to build a database of material properties of commonly used fibers and matrices so the user need only specify code names for constituents. Input to ICAN includes constituent material properties (or code names), factors reflecting the fabrication process, and composite geometry. ICAN performs micromechanics

  14. ICAN - INTEGRATED COMPOSITE ANALYZER (IBM 370 VERSION)

    Science.gov (United States)

    Murthy, P. L.

    1994-01-01

    The Integrated Composite Analyzer (ICAN) is a computer program designed to carry out a comprehensive linear analysis of multilayered fiber composites. The analysis contains the essential features required to effectively design structural components made from fiber composites. ICAN includes the micromechanical design features of the Intraply Hybrid Composite Design (INHYD) program to predict ply level hygral, thermal, and mechanical properties. The laminate analysis features of the Multilayered Filamentary Composite Analysis (MFCA) program are included to account for interply layer effects. ICAN integrates these and additional features to provide a comprehensive analysis capability for composite structures. Additional features unique to ICAN include the following: 1) ply stress-strain influence coefficients, 2) microstresses and microstrain influence coefficients, 3) concentration factors around a circular hole, 4) calculation of probable delamination locations around a circular hole, 5) Poisson's ratio mismatch details near a straight edge, 6) free-edge stresses, 7) material card input for finite element analysis using NASTRAN (available separately from COSMIC) or MARC, 8) failure loads based on maximum stress criterion, and laminate failure stresses based on first-ply failures and fiber breakage criteria, 9) transverse shear stresses, normal and interlaminar stresses, and 10) durability/fatigue type analyses for thermal as well as mechanical cyclic loads. The code can currently assess degradation due to mechanical and thermal cyclic loads with or without a defect. ICAN includes a dedicated data bank of constituent material properties, and allows the user to build a database of material properties of commonly used fibers and matrices so the user need only specify code names for constituents. Input to ICAN includes constituent material properties (or code names), factors reflecting the fabrication process, and composite geometry. ICAN performs micromechanics

  15. A Theoretical Diagnosis on Light Speed Anisotropy from GRAAL Experiment

    CERN Document Server

    Lingli, Zhou

    2012-01-01

    The light speed anisotropy, i.e., the variation of the light speed with respect to direction in an "absolute" reference frame, is a profound issue in physics. The one-way experiment, performed at the GRAAL facility of the European Synchrotron Radiation Facility (ESRF) in Grenoble, reported results on the light speed anisotropy by Compton scattering of laser photons on high-energy electrons. We show in this paper that the azimuthal distribution of the GRAAL experiment data can be elegantly reproduced by a new theory of Lorentz invariance violation or space-time anisotropy, based on a general principle of physical independence of the mathematical background manifold.

  16. Analyzing profiles, predictors, and consequences of student engagement dispositions.

    Science.gov (United States)

    Lawson, Michael A; Masyn, Katherine E

    2015-02-01

    Drawing from a nationally representative sample of 12,760 students attending public high schools in the United States, this study used latent class analysis (LCA) to analyze profiles, predictors, and consequences of student engagement dispositions. A student engagement disposition is an umbrella concept. It encompasses students' identification with school together with their academic competencies and overall educational aspirations. Six subpopulation profiles of engagement dispositions were culled from the data using LCA. These profiles included students who possessed "model student" attributes as well as others whose school experiences reflected ambivalence and disidentification. Where practice and policy are concerned, findings regarding the characteristics and consequences of each profile can be used by researchers, practitioners, and policy makers to facilitate tailored intervention planning as well as more nuanced policy development.

  17. [The study of baseline estimated in digital XRF analyzer].

    Science.gov (United States)

    Wang, Min; Zhou, Jian-Bin; Fang, Fang; Shi, Ze-Ming; Zhou, Wei; Liu, Yi; Cao, Jian-Yu; Zhu, Xing

    2013-01-01

    For the digital X-ray fluorescence analyzer, the voltage of the instability baseline will directly affect the performance of the instrument, resulting in decreased energy resolution. In order to solve this problem, Kalman filtering algorithm was used for pulse signal baseline estimate in the digital X-ray fluorescence. Whether using the classic Kalman filter, or the simplified sage-husa, or the improved sage-husa, their baseline filtering effects were all poor. So, it is necessary to improve and optimize existing algorithms. The method of Double-Forgotten was put forward to establish a new model of adaptive Kalman filter algorithm based on the sage-husa. The experiment results show that a very good filtering effect was obtained using the mathematical model of the baseline filter. The algorithm solved the problem of filtering divergence, avoided slow convergence of baseline and realized the pulse baseline restoration, and improved the instrumental energy resolution. PMID:23586263

  18. Carbonation profiles in cement paste analyzed by neutron diffraction

    Science.gov (United States)

    Galan, I.; Sanchez, J.; Andrade, C.; Evans, A.

    2012-02-01

    The present work deals with the carbonation process in cement based materials such as concrete. In order to clarify the evolution of the two main phases involved in the process, portlandite and calcium carbonate as a function of depth, spatially resolved neutron diffraction experiments have been performed at SALSA diffractometer at ILL in carbonated cement paste samples. Specimens submitted to different carbonation processes, both natural and accelerated, have been analyzed with this non destructive technique. The evolution of the main diffraction peaks of portlandite and calcite has been followed by means of neutron diffraction patterns measured at different depths. The results indicate that, in specimens subjected to CO2 atmospheres for 24 and 48 hours, the amount of calcite increases from the centre of the specimen to the surface. In both type of specimens calcite is formed at all depths analyzed, with higher quantities for the ones submitted to the longest carbonation period. Regarding the evolution of portlandite in these specimens, it almost completely disappeared, with only a low amount of the phase constant throughout the sample. In specimens subjected to air in a closed chamber for 21 months, higher amounts of portlandite were observed throughout the sample and little increase of calcite in the outer part, pointing out a much less severe reaction. The absorption effects are characterized by measuring in perpendicular directions and an absorption coefficient is calculated for portlandite.

  19. Analyzing Multimode Wireless Sensor Networks Using the Network Calculus

    Directory of Open Access Journals (Sweden)

    Xi Jin

    2015-01-01

    Full Text Available The network calculus is a powerful tool to analyze the performance of wireless sensor networks. But the original network calculus can only model the single-mode wireless sensor network. In this paper, we combine the original network calculus with the multimode model to analyze the maximum delay bound of the flow of interest in the multimode wireless sensor network. There are two combined methods A-MM and N-MM. The method A-MM models the whole network as a multimode component, and the method N-MM models each node as a multimode component. We prove that the maximum delay bound computed by the method A-MM is tighter than or equal to that computed by the method N-MM. Experiments show that our proposed methods can significantly decrease the analytical delay bound comparing with the separate flow analysis method. For the large-scale wireless sensor network with 32 thousands of sensor nodes, our proposed methods can decrease about 70% of the analytical delay bound.

  20. A Simple and Objective Method for Analyzing a Gymnastics Skill

    Directory of Open Access Journals (Sweden)

    Serena W.J. Khong

    2016-06-01

    Full Text Available The traditional approach to evaluate gymnastics by subjective rating requires an experienced eye, posing challenges to teachers and coaches who may not have the necessarypersonal experience. This study presented a simple and objective method for analyzing a dynamic, asymmetrical and multi-planar gymnastics skill (cartwheel. Two studies were conducted to analyze videos of cartwheel performances by quantifying ankle, knee, hip, shoulder, and torso angles using an open source freeware. Study 1 tested whether the method could differentiate between highly trained gymnasts and novices, and assessed the reliability of the method. Study 2 evaluated whether the method could track the progression of novice learners: Performances of an experimental and a control groups were compared before and after a 20-minute intervention. Results showed excellent intra- and inter-rater reliability (intra-class correlation > 0.90, standard error of measurement < 5°. Highly trained gymnasts displayed better forms than novices at the ankle, knee, shoulder and torso (all p < 0.05.After brief practice, novel learners showed improvements at the knees (p = 0.007 and ankles (group × time p = 0.05 when performing a cartwheel. In conclusion, the proposed video analysis method demonstrated good potential for assessing the cartwheel in a simple and objective way.