2,152 research outputs found
Musical score, "Haste Love," for voice and piano. Words by Minnie Gilmore, music by Alfred G. Robyn. Balmer and Weber Music House Company, c. 1892
No full textPatrick Gilmore's daughter, Minnie L. Gilmore, was an author in her own right. Her published works include "Songs from the Wings," "Pipes from the Prairieland," "A Son of Esau," and "The Woman Who Stood Between." One of her verses, from "Songs from the Wings," is entitled "To my father--Patrick Sarsfield Gilmore": "Though he is dead, I still may do/ Him honor, by a life akin/ To that pure life my childhood knew,/ His fatherheart within./ And for the true musician's place,/ You claimed a throne beside the priest;/ Since both, you said, redeemed the base,/ And blessed both great and least." In this song, her verse was set to music by Alfred George Robyn (1860-1935) a composer of light opera and founder of the Marion English Opera Company in New York. Balmer and Weber Music House Company, [c.] 1892
Extinction in NGC 628 and NGC 2403 derived from Paschen and Balmer lines
No full text. Long-slit spectrophotometry obtained simultaneously in the spectral ranges 3950--4900 A and 8000-- 10500 A is presented for a number of giant extragalactic H ii regions (GEHRs) in the spiral galaxies NGC 628 and NGC 2403. These ranges include lines from the Balmer and Paschen series of hydrogen separated by a wide wavelength interval. The Paschen and Balmer lines with special emphasis on the corresponding multiplet lines Pffi=Hffl are used to examine the dust extinction towards the GEHRs in these galaxies. We find good internal consistency for the observed/predicted line ratios used for derivation of the visual extinction, AV . Our results for AV are in general larger than previously published values based on the Hff=Hfi ratio with the GEHRs in NGC 628 exhibiting the largest extinction. Key words: galaxies: spiral -- galaxies: ISM -- dust, extinction -- H ii regions 1. Introduction Studies of both Galactic and extragalactic H ii regions rely on correction for the effect of dust on ..
[The] Bonnie Flag with the Stripes and Stars
No full text80.7568.151 – “[The] Bonnie Flag with the Stripes and Stars”: Col. J. L. Geddes: Balmer & Weber: 1863: SATB
Structure of the Balmer jump
No full textContext. The spectrum of the hydrogen atom was explained by Bohr more than one century ago. We revisit here some of the aspects of the underlying quantum structure, with a modern formalism, focusing on the limit of the Balmer series.
Aims. We investigate the behaviour of the absorption coefficient of the isolated hydrogen atom in the neighbourhood of the Balmer limit.
Methods. We analytically computed the total cross-section arising from bound-bound and bound-free transitions in the isolated hydrogen atom at the Balmer limit, and established a simplified semi-analytical model for the surroundings of that limit. We worked within the framework of the formalism of Landi Degl’Innocenti & Landolfi (2004, Astrophys. Space Sci. Lib., 307), which permits an almost straight-forward generalization of our results to other atoms and molecules, and which is perfectly suitable for including polarization phenomena in the problem.
Results. We analytically show that there is no discontinuity at the Balmer limit, even though the concept of a “Balmer jump” is still meaningful. Furthermore, we give a possible definition of the location of the Balmer jump, and we check that this location is dependent on the broadening mechanisms. At the Balmer limit, we compute the cross-section in a fully analytical way.
Conclusions. The Balmer jump is produced by a rapid drop of the total Balmer cross-section, yet this variation is smooth and continuous when both bound-bound and bound-free processes are taken into account, and its shape and location is dependent on the broadening mechanisms
High resolution measurements and modeling of auroral hydrogen emission line profiles
No full textMeasurements in the visible wavelength range at
high spectral resolution (1.3 A° ) have been made at Longyearbyen,
Svalbard (15.8 E,78.2 N) during an interval of intense
proton precipitation. The shape and Doppler shift of hydrogen
Balmer beta line profiles have been compared with
model line profiles, using as input ion energy spectra from
almost coincident passes of the FAST and DMSP spacecraft.
The comparison shows that the simulation contains the important
physical processes that produce the profiles, and confirms
that measured changes in the shape and peak wavelength
of the hydrogen profiles are the result of changing
energy input. This combination of high resolution measurements
with modeling provides a method of estimating the
incoming energy and changes in flux of precipitating protons
over Svalbard, for given energy and pitch-angle distributions.
Whereas for electron precipitation, information on the incident
particles is derived from brightness and brightness ratios
which require at least two spectral windows, for proton precipitation
the Doppler profile of resulting hydrogen emission
is directly related to the energy and energy flux of the incident
energetic protons and can be used to gather information
about the source region. As well as the expected Doppler
shift to shorter wavelengths, the measured profiles have a significant
red-shifted component, the result of upward flowing
emitting hydrogen atoms
Esporulação de Helminthosporium carbonum Ullstrup em segmentos de folhas de milho (Zea mays L.) destacadas.
No full textForam feitos estudos sobre a esporulação de um isolado de Helminthosporium carbonum Ullstrup em lesões, sobre sementos de folhas de milho, em condições de câmara úmida. Verificaram-se os efeitos do tipo da lesão e da idade do tecido sobre o início e intensidade de esporulação do patógeno. Os tipos de lesões, caracterizados pela conformação, pigmentação, tamanho médio e presença de c1orose, foram os mesmos utilizados para avaliar o grau de resistência das linhages e híbridos de milho, em estudo. A esporulação em tecidos de plantas resistentes se iniciou mais tarde e foi menos intensa que aquela observada em tecidos de plantas susceptíveis, sugerindo que o estudo da esporulação em condições de câmara úmida pode auxiliar na avaliação da resistência das plantas a H. carbonum
Constraining Balmer Alpha Fine Structure Excitation Measured in Geocoronal Hydrogen Observations
No full textCascade contributions to geocoronal Balmer α airglow line profiles are directly proportional to the Balmer β ∕α line ratio and can therefore be determined with near simultaneous Balmer β observations. Due to scattering differences for solar Lyman β and Lyman γ (responsible for the terrestrial Balmer α and Balmer β fluorescence, respectively), there is an expected trend for the cascade emission to become a smaller fraction of the Balmer α intensity at larger shadow altitudes. Near-coincident Balmer α and Balmer β data sets, obtained from the Wisconsin H alpha Mapper Fabry-Perot, are used to determine the cascade contribution to the Balmer α line profile and to show, for the first time, the Balmer β∕α line ratio, as a function of shadow altitude. We show that this result is in agreement with direct cascade determinations from Balmer α line profile fits obtained independently by high-resolution Fabry-Perot at Pine Bluff, WI. We also demonstrate with radiative transport forward modeling that a solar cycle influence on cascade is expected, and that the Balmer β ∕α line ratio poses a tight constraint on retrieved aeronomical parameters (such as hydrogen’s evaporative escape rate and exobase density)
Characterization of detachment inferred from the Balmer line ratios in JET-ILW low-confinement mode plasmas
No full textPublisher Copyright: © 2025Spectroscopic measurements of the hydrogenic Balmer-α and Balmer-γ line emission in JET-ILW low-confinement mode (L-mode) deuterium plasmas are used to assess the onset of volume recombination in the low-field side (LFS) divertor. The evolution of the EDGE2D-EIRENE predicted Balmer-γ to Balmer-α emission ratio from low-recycling to detached conditions is in qualitative agreement with the measured ratio. In low-recycling conditions the EDGE2D-EIRENE predicted line-emission is within 30% of measured emission, in high-recycling within 20%t, and in detached conditions lower by a factor of 2.5.Peer reviewe
Alternative Dispute Resolution in Patent Controversies
No full textMr. Balmer relates how ADR allows attorneys to tailor rules to resolve disputes in light of, e.g., party relationships and internal dynamics. He notes that, for life to go on, having resolution is itself an important goal
Flare model sensitivity of the Balmer spectrum
No full textCareful studies of various chromospheric spectral signatures are very important in order to explore their possible sensitivity to the modifications of the thermodynamic quantities produced by the flare occurrence. Pioneer work of Canfield and co-workers have shown how the H alpha behavior is able to indicate different changes in the atmospheric parameters structure associated to the flare event. It was decided to study the behavior of the highest Balmer lines and of the Balmer continuum in different solar flare model atmospheres. These spectral features, originating in the deep photosphere in a quiet area, may have a sensitivity different from H alpha to the modification of a flare atmosphere. The details of the method used to compute the Stark profile of the higher Balmer line (n is greater than or equal to 6) and their merging were extensively given elsewhere (Donati-Falchi et al., 1985; Falchi et al., 1989). The models used were developed by Ricchiazzi in his thesis (1982) evaluating the chromospheric response to both the nonthermal electron flux, for energy greater than 20 kev, (F sub 20) and to the thermal conduction, (F sub c). The effect of the coronal pressure values (P sub O) at the apex of the flare loop is also included
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