10,736 research outputs found
On the Consistent Effect Histories Approach to Quantum Mechanics
A formulation of the consistent histories approach to quantum mechanics in
terms of generalized observables (POV measures) and effect operators is
provided. The usual notion of `history' is generalized to the notion of `effect
history'. The space of effect histories carries the structure of a D-poset.
Recent results of J.D. Maitland Wright imply that every decoherence functional
defined for ordinary histories can be uniquely extended to a bi-additive
decoherence functional on the space of effect histories. Omnes' logical
interpretation is generalized to the present context. The result of this work
considerably generalizes and simplifies the earlier formulation of the
consistent effect histories approach to quantum mechanics communicated in a
previous work of this author.Comment: LaTeX 2.09 version replaced by LaTeX2e version, minor change
Away-side azimuthal distribution in a Markovian parton scattering model
An event generator is constructed on the basis of a model of multiple
scattering of partons so that the trajectory of a parton traversing a dense and
expanding medium can be tracked. The parameters in the code are adjusted to fit
the \Delta\phi azimuthal distribution on the far side when the trigger momentum
is in the non-perturbative region, p_T(trigger)<4 GeV/c. The dip-bump structure
for 1<p_T(assoc)<2.5 GeV/c is reproduced by averaging over the exit tracks of
deflected jets. An essential characteristic of the model, called Markovian
Parton Scattering (MPS) model, is that the scattering angle is randomly
selected in the forward cone at every step of a trajectory that is divided into
many discrete steps in a semi-classical approximation of the non-perturbative
scattering process. Energy loss to the medium is converted to thermal partons
which hadronize by recombination to give rise to the pedestal under the bumps.
When extended to high trigger momentum with \pt(trigger) >8 GeV/c, the model
reproduces the single-peak structure observed by STAR without invoking any new
dynamical mechanism.Comment: 20 pages + 3 figure
Nurses\u27 Alumnae Association Bulletin, April 1955
Alumnae Notes
Annual Giving
Committee Reports
Digest of Alumnae Meetings
Graduation Awards - 1954
Legal Aspects of Nursing
Marriages
Necrology
New Arrivals
Physical Advances at Jefferson
President\u27s Message
School of Nursing Report
The Challenge of Neurosurgical Nursin
Quantum lost property: a possible operational meaning for the Hilbert-Schmidt product
Minimum error state discrimination between two mixed states \rho and \sigma
can be aided by the receipt of "classical side information" specifying which
states from some convex decompositions of \rho and \sigma apply in each run. We
quantify this phenomena by the average trace distance, and give lower and upper
bounds on this quantity as functions of \rho and \sigma. The lower bound is
simply the trace distance between \rho and \sigma, trivially seen to be tight.
The upper bound is \sqrt{1 - tr(\rho\sigma)}, and we conjecture that this is
also tight. We reformulate this conjecture in terms of the existence of a pair
of "unbiased decompositions", which may be of independent interest, and prove
it for a few special cases. Finally, we point towards a link with a notion of
non-classicality known as preparation contextuality.Comment: 3 pages, 1 figure. v2: Less typos in text and less punctuation in
titl
Domestic Relations—Separation Agreements
Nichols v. Nichols, 306 N.Y. 490, 119 N.E. 2d 351 (1953); Rehill v. Rehill, 306 N.Y. 126, 116 N.E. 2d 281 (1953)
Insurance—Variance Between Option and the Settlement Agreement Will Not Defeat A Supplementary Contract
Hall v. Mutual Life Ins. Co. of New York, 282 App. Div. 203, 122 N. Y. S. 2d 239 (1st Dep\u27t 1953)
The Importance of Music Festivals: An Unanticipated and Underappreciated Path to Identity Formation
The purpose of this study is to understand and explain the growing popularity of music and art festivals around the world. Music festivals are events consisting of a variety of bands and musical artists performing shows, on numerous stages, over a period of days to a large audience in outside and inside venues. Through field research, participant-observation, personal interviews, and survey research at the 2015 Bonnaroo Music and Arts Festival, this study suggests that they are much more than simple entertainment venues. Because humans desire to belong and music functions in the capacity as a global language, music festivals are not just mega events. Rather, they are best understood as vehicles for forming communities and nations that have the capacity for creating those ingredients that are a critical part of identity formation
Income Tax—Entertainment Expense Attributable to Taxpayer Deductible Only If in Excess of Amount One Ordinarily Spends
Sutter v. Commissioner, 21 T. C. No. 20 (1953)
Municipal Corporations—Status of School Teacher
Daniman v. Board of Education of City of New York, 306 N.Y. 532. 119 N.E. 2d 373 (1954)
Men in the Service of God
In the Epistle to the Hebrews Jesus Christ is declared to be the same yesterday, today, and forever. Unlike our Master and Chief Shepherd, we, His underlings, are subject to time as we progress toward the world to come. The usual division of time into past, present, and future unites us all in common experience. There is a longer or shorter past for all age groups here represented, the same present to challenge us all, and a bright future for each one, whether he face dawn, noon, or dusk in life\u27s little day.
When we say time affects us all, we have in mind another division of human time, namely, youth, middle age, and old age. In His vineyard, the church, God employs men of all three age brackets. There is a place, a service station, if you please, for you and me in the kingdom of Christ regardless of relative youth or seniority. We who meet for this conference represent a cross-sectional group, including men in youth, in life\u27s prime, and in ripe maturity. Though, with respect to age, as in the instance of St. Paul and Timothy, some of us could be fathers and sons to one another, we are in spirit brothers all. Therefore we have a message for all as we give the honor of Holy Scripture to God\u27s ministers in the three age categories
- …