6,585 research outputs found
Player’s Ball: Ella McCartney in conversation with Peter Doig and Markus Lupertz
No full textMarkus Lupertz and Peter Doig interviewed by Artist Ella McCartney for Arena Homme + in response to Markus Lupertz solo exhibition 'Player's Ball' at Michael Werner Gallery, London. Works selected and curated by Peter Doig. (30 January through 15 March 2014)
Translator: Philipp Ebelin
Family History of Amber Ball
No full textAmber Renee Ball authored this family history as part of the course requirements for HIST 550/700 Your Family in History offered online in Spring 2020 and was submitted to the Pittsburg State University Digital Commons. Please contact the author directly with any questions or comments: [email protected]
Cannon Ball Day School Records
No full textTyped carbon copy of the history of the Cannon Ball Day School, 1883-1941, by an unknown author; school was built for Indian children, in later years white students enrolled; school was first managed by the federal government, later the Catholic Church, the Oak Grove School District No. 12 (N.D.), and finally the federal government
I dream of him by night He must not dream of me! [text varies with each verse] [first line of chorus]
No full textstrophic with choruspiano and voiceJohns Hopkins University, Levy Sheet Music Collection, Box
042, Item 129aThe Poetry from the N.Y. Mirror by the Author of Lillian. Music by Alexander Ball, Esqr.E. Gillingha
I dream of him by night He must not dream of me! [text varies with each verse] [first line of chorus]
No full textstrophic with choruspiano and voiceJohns Hopkins University, Levy Sheet Music Collection, Box
042, Item 129aThe Poetry from the N.Y. Mirror by the Author of Lillian. Music by Alexander Ball, Esqr.E. Gillingha
Photoproduction of pion pairs off nucleons
No full textIn the absence of a solution for Quantum Chromodynamics (QCD) in the low energy regime, so called effective models are being used to describe the nucleon and
its excited states. These models include the basic symmetries from QCD, but on the other hand, compared to quarks and gluons, use higher lying degrees of freedom.
Experimental contributions are mandatory to validate these models and fix free parameters. Today still most of the world-data in this field was obtained by
meson-induced excitation of the nucleon. Even though numerous excited states of the nucleon could be identified, the number of model predicted states is much
higher. This is known as the missing resonance problem. One explanation could be that some excited states just couple weakly to pion-N (kaon-N) and hence the
excitation via photons was proposed to further test the model predictions.
During the last 15 years, much experimental effort was made at various photoproduction facilities like MAMI, ELSA, JLab or ESRF and a large number of states
could be confirmed, but the missing resonance problem could not be solved. Higher lying resonances (M > 1.6 GeV) decay preferably via sequential decays with
many meson final states, and especially double pion decay channels are assumed to dominate in this region. The reactions investigated in this work, namely
g+p(n)->pion^0+pion^0+p(n), g+n(p)->pion^0+pion^0+n(p), g+p->pion^0+pion^0+p, g+p(n)->pion^++pion^0+n(n), g+n(p)->pion^-+pion^0+p(p), g+p->pion^++pion^0+n
thus form the primary source of information on photocouplings of higher lying resonances.
This work explores neutral and mixed-charge double pion production channels up to invariant masses of the final state center-of-mass system of about 1.9 GeV
and presents unpolarized as well as single-polarized observables. All results have high precision, are compared to different model predictions, and will
considerably constrain future model analyses in the field of double pion photoproduction and beyond.
The data of this work were taken at MAMI in four different experiments with liquid hydrogen and deuterium targets in 2007 and 2009 and include over 600 hours
of beam time. A longitudinally polarized electron beam was used to produce circularly polarized bremsstrahlung photons with energies up 1.4 GeV. The reaction
products, charged pions, photons and nucleons, were detected in the combined calorimeter consisting of Crystal Ball and TAPS.
Total and differential cross sections, invariant mass distributions of N-pion and pion-pion and beam helicity asymmetries were computed in the fully reconstructed
final state center-of-mass system. Effects from Fermi motion in the deuteron target could be reliably defolded leading to a good agreement between free and
quasifree proton data, and thus the neutron results can be interpreted as a good approximation of free neutron data.
Beam-helicity asymmetries for g+n(p)->pion^0+pion^0+n(p) and g+n(p)->pion^-+pion^0+p(p) have been measured for the first time and published together with the
results from the proton data. Especially for the mixed-charge results, the available model calculations fail to reproduce the data, and for the neutral channel
data, an unexpected similarity for proton and neutron results was observed.
Total and differential cross sections as well as invariant mass distributions of N-pion and pion-pion for g+n(p)->pion^-+pion^0+p(p) have also been measured for
the first time and previous results for g+p(n)->pion^++pion^0+n(n) could be reproduced and extended into the third resonance region
Development of a smart ball for hand therapy
No full textvorgelegt von: Markus KreindlWien, FH Campus Wien, Masterarb., 2020Arbeit gesperr
“A Border is a Veil”: Death as a Border in The Farming of Bones and The Book Thief
No full textWithin literature, death has always been a common theme. In this essay, death as a border in literature will be explored in Edwidge Danticat’s The Farming of Bones and Markus Zusak’s The Book Thief. The Farming of Bones follows Amabelle Désir, a young Haitian woman working in the Dominican Republic, and tells of the Haitian massacre in the Dominican Republic in 1937. The Book Thief follows Liesel Meminger, a young German girl living under the Nazi regime, and tells of life during World War II. Both Danticat and Zusak explore death as it appears in those tragedies, how it affects the people under those regimes, and how it creates a border. Death creates a border both physical and spiritual, rigid yet permeable, and one that is displayed through the personification of death by Danticat and Zusak
Fiber tracking in q-ball fields using regularized particle trajectories
No full textMost of the approaches dedicated to fiber tracking from diffusion-weighted MR data rely on a tensor model. However, the tensor model can only resolve a single fiber orientation within each imaging voxel. New emerging approaches have been proposed to obtain a better representation of the diffusion process occurring in fiber crossing. In this paper, we adapt a tracking algorithm to the q-ball representation, which results from a spherical Radon transform of high angular resolution data. This algorithm is based on a Monte-Carlo strategy, using regularized particle trajectories to sample the white matter geometry. The method is validated using a phantom of bundle crossing made up of haemodialysis fibers. The method is also applied to the detection of the auditory tract in three human subjects
Monocular Golf Ball Tracking and Size Estimation
No full textIn order to estimate the distance between a moving camera and a golfball, the projective ball size in images is measured. Two methods are evaluated based on their ability to detect golf balls in TV broadcasting images: circular Hough transform and scale-space blob detection. A tracking algorithm is then proposed where, given a known ball position, a search window is used, adapting for ball speed in the image plane, ballsize and previous window size.Various pre-processing methods are also discussed, including deinterlacing and an approximate background subtraction method. Experimentsshows that none of these pre-processing methods significantly improves the performance in terms of ball detection, although tendencies of improvement is noticed in some test sequences.The tracking algorithm is evaluated by using sequences from TV broadcasts of golf competitions. The algorithm performs well under certain circumstances, where the projective size of the ball is the key to accurate measurements of the distance between ball and camera. The noisy input data however introduces noise also to the size estimations,resulting in noisy distance estimations. Additionally, the test sequences contains no ground truth for the actual distance between ball and camera,and the accuracy of the method could therefore only be determined in terms of noise analysis
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