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Search Results: 1 - 10 of 5034 matches for " Hogan Nguyen "
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CPT Results from KTeV
Hogan Nguyen
Physics , 2001,
Abstract: I present several preliminary measurements from KTeV of the fundamental neutral kaon parameters, and their implications for CPT violation. A new limit is given on the sidereal time dependence of $\phi_{+-}$. The results are based on data collected in 1996-97.
Agency, political economy, and the transnational democratic ideal
Brendan Hogan
Ethics & Global Politics , 2010, DOI: 10.3402/egp.v3i1.4852
Abstract:
Quantum Geometry in the Lab
Craig Hogan
Physics , 2013,
Abstract: Standard particle theory is based on quantized matter embedded in a classical geometry. Here, a complementary model is proposed, based on classical matter -- massive bodies, without quantum properties -- embedded in a quantum geometry. It does not describe elementary particles, but may be a better, fully consistent quantum description for position states in laboratory-scale systems. Gravitational theory suggests that the geometrical quantum system has an information density of about one qubit per Planck length squared. If so, the model here predicts that the quantum uncertainty of geometry creates a new form of noise in the position of massive bodies, detectable by interferometers.
Quantum Geometry and Interferometry
Craig Hogan
Physics , 2012,
Abstract: All existing experimental results are currently interpreted using classical geometry. However, there are theoretical reasons to suspect that at a deeper level, geometry emerges as an approximate macroscopic behavior of a quantum system at the Planck scale. If directions in emergent quantum geometry do not commute, new quantum-geometrical degrees of freedom can produce detectable macroscopic deviations from classicality: spatially coherent, transverse position indeterminacy between any pair of world lines, with a displacement amplitude much larger than the Planck length. Positions of separate bodies are entangled with each other, and undergo quantum-geometrical fluctuations that are not describable as metric fluctuations or gravitational waves. These fluctuations can either be cleanly identified or ruled out using interferometers. A Planck-precision test of the classical coherence of space-time on a laboratory scale is now underway at Fermilab.
Now Broadcasting in Planck Definition
Craig Hogan
Physics , 2013,
Abstract: If reality has finite information content, space has finite fidelity. The quantum wave function that encodes spatial relationships may be limited to information that can be transmitted in a "Planck broadcast", with a bandwidth given by the inverse of the Planck time, about $2\times 10^{43}$ bits per second. Such a quantum system can resemble classical space-time on large scales, but locality emerges only gradually and imperfectly. Massive bodies are never perfectly at rest, but very slightly and slowly fluctuate in transverse position, with a spectrum of variation given by the Planck time. This distinctive new kind of noise associated with quantum geometry would not have been noticed up to now, but may be detectable in a new kind of experiment.
Measurement of Quantum Geometry Using Laser Interferometry
Craig Hogan
Physics , 2013,
Abstract: New quantum degrees of freedom of space-time, originating at the Planck scale, could create a coherent indeterminacy and noise in the transverse position of massive bodies on macroscopic scales. An experiment is under development at Fermilab designed to detect or rule out a transverse position noise with Planck spectral density, using correlated signals from an adjacent pair of Michelson interferometers. A detection would open an experimental window on quantum space-time.
Non-linear Recurrences that Quite Unexpectedly Generate Rational Numbers
Emilie Hogan
Mathematics , 2009,
Abstract: Non-linear recurrences which generate integers in a surprising way have been studied by many people. Typically people study recurrences that are linear in the highest order term. In this paper I consider what happens when the recurrence is not linear in the highest order term. In this case we no longer produce a unique sequence, but we sometimes have surprising results. If the highest order term is raised to the $m^{th}$ power we expect answers to have $m^{th}$ roots, but for some specific recurrences it happens that we generate rational numbers ad infinitum. I will give a general example in the case of a first order recurrence with $m=2$, and a more specific example that is order 3 with $m=2$ which comes from a generalized Somos recurrence.
Automated electronic medical record sepsis detection in the emergency department
Su Q. Nguyen,Edwin Mwakalindile,James S. Booth,Vicki Hogan,Jordan Morgan,Charles T. Prickett,John P. Donnelly,Henry E. Wang
PeerJ , 2015, DOI: 10.7717/peerj.343
Abstract: Background. While often first treated in the emergency department (ED), identification of sepsis is difficult. Electronic medical record (EMR) clinical decision tools offer a novel strategy for identifying patients with sepsis. The objective of this study was to test the accuracy of an EMR-based, automated sepsis identification system.
Selling Politics? How the Traits of Salespeople Manifest Themselves in Irish Politicians  [PDF]
Dónal ó Mearáin, Roger Sherlock, John Hogan
Open Journal of Political Science (OJPS) , 2013, DOI: 10.4236/ojps.2013.34024
Abstract:

This article seeks to uncover if some of the traits most associated with salespeople manifested themselves in the activities of candidates in the constituency of Dún Laoghaire during the 2007 Irish general election. Such a finding would suggest that just as political parties have looked to the marketing profession for their lead in developing political marketing, politicians are looking to, and adopting the traits of those in the sales profession. This would point to the traits that the modern politician must possess in order to get and remain elected. It would also raise significant questions in terms of how candidates present themselves to the electorate, as well as how they go about campaigning and formulating policy.

User Model Clustering  [PDF]
Loc Nguyen
Journal of Data Analysis and Information Processing (JDAIP) , 2014, DOI: 10.4236/jdaip.2014.22006
Abstract:

User model which is the representation of information about user is the heart of adaptive systems. It helps adaptive systems to perform adaptation tasks. There are two kinds of adaptations: 1) Individual adaptation regarding to each user; 2) Group adaptation focusing on group of users. To support group adaptation, the basic problem which needs to be solved is how to create user groups. This relates to clustering techniques so as to cluster user models because a group is considered as a cluster of similar user models. In this paper we discuss two clustering algorithms: k-means and k-medoids and also propose dissimilarity measures and similarity measures which are applied into different structures (forms) of user models like vector, overlay, and Bayesian network.

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