13,406 research outputs found
Computer program performs rectangular fitting stress analysis
Computer program simulates specific bulkhead fittings by subjecting the desired geometry configuration to a membrane force, an external force, an external moment, an external tank pressure, or any combination of the above. This program generates a general model of bulkhead fittings for the Saturn booster
Fast change point analysis on the Hurst index of piecewise fractional Brownian motion
In this presentation, we introduce a new method for change point analysis on
the Hurst index for a piecewise fractional Brownian motion. We first set the
model and the statistical problem. The proposed method is a transposition of
the FDpV (Filtered Derivative with p-value) method introduced for the detection
of change points on the mean in Bertrand et al. (2011) to the case of changes
on the Hurst index. The underlying statistics of the FDpV technology is a new
statistic estimator for Hurst index, so-called Increment Bernoulli Statistic
(IBS). Both FDpV and IBS are methods with linear time and memory complexity,
with respect to the size of the series. Thus the resulting method for change
point analysis on Hurst index reaches also a linear complexity
Differential cross sections at forward angles for hydrogen and helium particles from 62 MeV protons incident on Ni-60
Tabulated differential cross sections are presented for the production, at angles of 15, 20, 25, and 40 deg, of proton, deuteron, triton, helium-3, and alpha particles from Ni-60 bombarded by 62-MeV protons. Continuum cross sections are listed in about 1-MeV bins for energies above lower cutoffs which range from 4 to 15 MeV for the different types of exit particles. Only the integral cross section is known for a considerable energy range within each spectrum. The proton, deuteron, and alpha particle cross sections are the same in the continuum range region above the evaporation peak as those cross sections previously observed for Fe-54 and Fe-56, but the corresponding yield of tritons is higher from Ni-60 and Fe-56 than from Fe-54
Tabulated cross sections for hydrogen and helium particles produced by 61-MeV protons on Fe56
Tabulated cross sections for hydrogen and helium particles produced by 61 MeV on iron 5
To sell or not to sell? Behavior of shareholders during price collapses
It is a common belief that the behavior of shareholders depends upon the
direction of price fluctuations: if prices increase they buy, if prices
decrease they sell. That belief, however, is more based on ``common sense''
than on facts. In this paper we present evidence for a specific class of
shareholders which shows that the actual behavior of shareholders can be
markedly different.Comment: 9 pages, 1 figure. To appear in International Journal of Modern
Physics
Stable Colored Particles R-SUSY Relics or Not?
R-hadrons are only one of many possible stable colored states that the LHC
might produce. All such particles would provide a spectacular, if somewhat
unusual, signal at ATLAS and CMS. Produced in large numbers and leaving a
characteristic signature throughout all layers of the detector, including the
muon chamber, they could be straightforward to discover even with low
luminosity. Though such long lived colored particles (LLCPs) can be realized in
many extensions of the Standard Model, most analyses of their phenomenology
have focused only on R-hadrons. In order to distinguish among the
possibilities, fundamental quantum numbers of the new states must be measured.
In this paper, we demonstrate how to identify the charge and spin of
such new particles at the LHC.Comment: 11 pages, 7 figure
Influence of electromagnetic interferences on the gravimetric sensitivity of surface acoustic waveguides
Surface acoustic waveguides are increasing in interest for (bio)chemical
detection. The surface mass modification leads to measurable changes in the
propagation properties of the waveguide. Among a wide variety of waveguides,
Love mode has been investigated because of its high gravimetric sensitivity.
The acoustic signal launched and detected in the waveguide by electrical
transducers is accompanied by an electromagnetic wave; the interaction of the
two signals, easily enhanced by the open structure of the sensor, creates
interference patterns in the transfer function of the sensor. The influence of
these interferences on the gravimetric sensitivity is presented, whereby the
structure of the entire sensor is modelled. We show that electromagnetic
interferences generate an error in the experimental value of the sensitivity.
This error is different for the open and the closed loop configurations of the
sensor. The theoretical approach is completed by the experimentation of an
actual Love mode sensor operated under liquid in open loop configuration. The
experiment indicates that the interaction depends on the frequency and the mass
modifications.Comment: 28 pages, 8 figure
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