193 research outputs found

    Periods of High Intensity Solar Proton Flux

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    Analysis is presented for times during a space mission that specified solar proton flux levels are exceeded. This includes both total time and continuous time periods during missions. Results for the solar maximum and solar minimum phases of the solar cycle are presented and compared for a broad range of proton energies and shielding levels. This type of approach is more amenable to reliability analysis for spacecraft systems and instrumentation than standard statistical models

    Possible Autochthonous Malaria from Marseille to Minneapolis

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    We report 2 cases of Plasmodium falciparum malaria in southern France in a French woman and an American man of Togolese origin who reported no recent travel to malaria-endemic countries. Both infections occurred after a stay near Marseille, which raises the possibility of autochthonous transmission. Entomologic and genotypic investigations are described

    Time Exceedances for High Intensity Solar Proton Fluxes

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    A model is presented for times during a space mission that specified solar proton flux levels are exceeded. This includes both total time and continuous time periods during missions. Results for the solar maximum and solar minimum phases of the solar cycle are presented and compared for a broad range of proton energies and shielding levels. This type of approach is more amenable to reliability analysis for spacecraft systems and instrumentation than standard statistical models

    Structure and Colors of Diffuse Emission in the Spitzer Galactic First Look Survey

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    We investigate the density structure of the interstellar medium using new high-resolution maps of the 8 micron, 24 micron, and 70 micron surface brightness towards a molecular cloud in the Gum Nebula, made as part of the Spitzer Space Telescope Galactic First Look Survey. The maps are correlated with 100 micron images measured with IRAS. At 24 and 70 micron, the spatial power spectrum of surface brightness follows a power law with spectral index -3.5. At 24 micron, the power law behavior is remarkably consistent from the 0.2 degree size of our maps down to the 5 arcsecond spatial resolution. Thus, the structure of the 24 micron emission is self-similar even at milliparsec scales. The combined power spectrum produced from Spitzer 24 micron and IRAS 25 micron images is consistent with a change in the power law exponent from -2.6 to -3.5. The decrease may be due to the transition from a two-dimensional to three-dimensional structure. Under this hypothesis, we estimate the thickness of the emitting medium to be 0.3 pc.Comment: 13 Pages, 3 Figures, to be published in Astrophysical Journal Supplement Series (Spitzer Special Issue), volume 154. Uses aastex v5.

    The effective potential, critical point scaling and the renormalization group

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    The desirability of evaluating the effective potential in field theories near a phase transition has been recognized in a number of different areas. We show that recent Monte Carlo simulations for the probability distribution for the order parameter in an equilibrium Ising system, when combined with low-order renormalization group results for an ordinary ϕ4\phi^4 system, can be used to extract the effective potential. All scaling features are included in the process.Comment: REVTEX file, 22 pages, three figures, submitted to Phys. Rev.

    The Ursinus Weekly, December 4, 1950

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    Gillespie to play at Friday night senior formal • Men students cast 107-71 vote against dorm amendment • Music organizations to present Messiah in Bomberger chapel Thursday night • Y Commissions to meet; PAC plans Xmas party • Response to WSSF is disappointing; Receipts total $350 • Critic hails Angel Street as vehicle for superb thespian dramatic acting • Hungarian to address Tuesday night Forum • Twelve to become Rosicrucians • Yule traditions dominate ensuing campus activities • Bloodmobile to be at Trinity church Thursday morning • 26 are accepted by local chapter of Pi Gamma Mu • Cafe Pigalle to return to gym Saturday night • Mary MacPherson chosen May Queen; Marge Paynter named pageant manager • Editorial: Dynamic force • WSGA notes • Delta Pi Sigma welcomes ten off-campus men • English Club admits members • Revived rec center attracts many • 45 future teachers approach termination of tribulation • IRC hears attorney speak on problems of western nations • Ruby schedules photos, pushes subscriptions • Pigskin parade • Bears top textile 64-50 in court season inaugural • Six close careers on soccer squad • Derr deadlocks Albright 6-6 • Four senior girls play hockey finale • Grid player scans all-state selections • Ursinus grid aggregation suffers loss of twelve graduating upper classmen • Penn triumphs 3-1 over Ursinus girls • Reid Watson became football manager when injury benched former grid star • Messiah reputation stems from mastery of simple techniques • Eight teams compete in debate tournament • Chess team loses • Kershner does dialect in fourth lit readinghttps://digitalcommons.ursinus.edu/weekly/1554/thumbnail.jp

    Ancylostoma ceylanicum Hookworm in Myanmar Refugees, Thailand, 2012–2015

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    During 2012–2015, US-bound refugees living in Myanmar– Thailand border camps (n = 1,839) were surveyed for hookworm infection and treatment response by using quantitative PCR. Samples were collected at 3 time points: after each of 2 treatments with albendazole and after resettlement in the United States. Baseline prevalence of Necator americanus hookworm was 25.4%, Ancylostoma duodenale 0%, and Ancylostoma ceylanicum (a zoonosis) 5.4%. Compared with N. americanus prevalence, A. ceylanicum hookworm prevalence peaked in younger age groups, and blood eosinophil concentrations during A. ceylanicum infection were higher than those for N. americanus infection. Female sex was associated with a lower risk for either hookworm infection. Cure rates after 1 dose of albendazole were greater for A. ceylanicum (93.3%) than N. americanus (65.9%) hookworm (p\u3c0.001). Lower N. americanus hookworm cure rates were unrelated to β-tubulin single-nucleotide polymorphisms at codons 200 or 167. A. ceylanicum hookworm infection might be more common in humans than previously recognized

    Finite Size Scaling and Critical Exponents in Critical Relaxation

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    We simulate the critical relaxation process of the two-dimensional Ising model with the initial state both completely disordered or completely ordered. Results of a new method to measure both the dynamic and static critical exponents are reported, based on the finite size scaling for the dynamics at the early time. From the time-dependent Binder cumulant, the dynamical exponent zz is extracted independently, while the static exponents β/ν\beta/\nu and ν\nu are obtained from the time evolution of the magnetization and its higher moments.Comment: 24 pages, LaTeX, 10 figure
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