396 research outputs found
Particle-resolved hyperspectral pyrometry of metal particles
We present temperature histories of individual combusting metal particles using hyperspectral pyrometry. This method gives an increase in accuracy over traditionally used two- or three-color pyrometry, while maintaining temporal and spatial resolution. Temperatures can be determined between 1800 to K with a precision of typically 1%. It is shown that the maximum temperature of the burning iron particles increases from 2760 K to 2840 K with an increasing mean particle size from 32 to 54m in air with 21 % oxygen. The relatively high temperatures and its dependence on particle size are possibly related to flow field properties of the current experimental setup. Opportunities for this method, as well as future work, are discussed.Novelty and Significance Statement: In this article, a method to use a CCD camera and spectrograph as a hyperspectral detector, gaining a wavelength dimension while maintaining two spatial dimensions, is demonstrated and validated. This method is applied to measure the temperature of iron particles, a carbon free and circular energy carrier. This method is then used to prove that there is a particle size dependence on the maximum temperature, an open question which is often disputed in literature. This work will also add a dataset that can be used for the validation of numerical models. There are only two such datasets available for iron at this moment. Our analysis suggests that the heat release of iron is dependent on the slip velocity, possibly due to a circulating flow inside of the particle
Uncovering perceived identification accuracy of in-vehicle biometric sensing
Biometric techniques can help make vehicles safer to drive, authenticate users, and provide personalized in-car experiences. However, it is unclear to what extent users are willing to trade their personal biometric data for such benefits. In this early work, we conducted an open card sorting study (N=11) to better understand how well users perceive their physical, behavioral and physiological features can personally identify them. Findings showed that on average participants clustere
Masses of the \eta_c(nS) and \eta_b(nS) mesons
The hyperfine splittings in heavy quarkonia are studied using new
experimental data on the di-electron widths. The smearing of the spin-spin
interaction is taken into account, while the radius of smearing is fixed by the
known and splittings and appears to
be small, fm. Nevertheless, even with such a small radius
an essential suppression of the hyperfine splittings ( is observed
in bottomonium. For the states the values we
predict (in MeV) are 28, 12, 10, 6, 6, and 3, respectively. In single-channel
approximation for the and charmonium states the splittings 16(2) MeV
and 12(4) MeV are obtained.Comment: 13 pages, no figure
Mapping the Potential Risk of Mycetoma Infection in Sudan and South Sudan Using Ecological Niche Modeling
In 2013, the World Health Organization (WHO) recognized mycetoma as one of the neglected tropical conditions due to the efforts of the mycetoma consortium. This same consortium formulated knowledge gaps that require further research. On
Complete Genome Sequence of Mycobacterium fortuitum subsp. fortuitum Type Strain DSM46621
Mycobacterium fortuitum is a member of the rapidly growing nontuberculous mycobacteria (NTM). It is ubiquitous in water and soil habitats, including hospital environments. M. fortuitum is increasingly recognized as an opportunistic nosocomial pathogen causing disseminated infection. Here we report the genome sequence of M. fortuitum subsp. fortuitum type strain DSM46621
Non-standard interactions using the OPERA experiment
We investigate the implications of non-standard interactions on neutrino
oscillations in the OPERA experiment. In particular, we study the non-standard
interaction parameter . We show that the OPERA experiment
has a unique opportunity to reduce the allowed region for this parameter
compared with other experiments such as the MINOS experiment, mostly due to the
higher neutrino energies in the CNGS beam compared to the NuMI beam. We find
that OPERA is mainly sensitive to a combination of standard and non-standard
parameters and that a resulting anti-resonance effect could suppress the
expected number of events. Furthermore, we show that running OPERA for five
years each with neutrinos and anti-neutrinos would help in resolving the
degeneracy between the standard parameters and . This
scenario is significantly better than the scenario with a simple doubling of
the statistics by running with neutrinos for ten years.Comment: 15 pages, 5 figures, REVTeX
Complete genome sequence of Mycobacterium vaccae type strain ATCC 25954
Item does not contain fulltextMycobacterium vaccae is a rapidly growing, nontuberculous Mycobacterium species that is generally not considered a human pathogen and is of major pharmaceutical interest as an immunotherapeutic agent. We report here the annotated genome sequence of the M. vaccae type strain, ATCC 25954.1 november 201
Complete genome sequence of Mycobacterium vaccae type strain ATCC 25954
Item does not contain fulltextMycobacterium vaccae is a rapidly growing, nontuberculous Mycobacterium species that is generally not considered a human pathogen and is of major pharmaceutical interest as an immunotherapeutic agent. We report here the annotated genome sequence of the M. vaccae type strain, ATCC 25954.1 november 201
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