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Search Results: 1 - 10 of 299221 matches for " J. J. Harris "
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Root Canals and Crowns: An Analysis of the Spatial Distribution of Dental Offices in Ciudad Juárez, Chihuahua, Mexico, 1996-2011  [PDF]
Patricia J. Boda, James Harris
International Journal of Geosciences (IJG) , 2013, DOI: 10.4236/ijg.2013.46A2005

Every city above a certain size has health services that are located, to a large extent, close to their patients. This study analyzes the spatial distribution of dental office and the change in the number of dental offices in Ciudad Juárez, Chihuahua, Mexico over a 15-year time period. Research was conducted in 1996 and 2011. Maps showing the location of dental offices for these two years indicate a clustering of dental offices within one and one-half miles of the city’s two principal border-crossing points between the United States and Mexico. Provider-based surveys were also used to determine the mix of patients (US or Mexican citizens) at the dental offices found throughout the city. By 2011, nearly all of the dental offices clustered within one and one-half miles of the two principal US-Mexico border crossings had 100% of their patients from the United States.

C.J. Harris
Scientia Militaria : South African Journal of Military Studies , 2012, DOI: 10.5787/10-4-690
Abstract: During the course of a recent visit to Simonstown I parked my car on the heights of Jubilee Square from which vantage point I could gaze down upon the naval dockyard and the buildings which today form only a portion of the vast naval complex which spreads its tentacles from one end of Simonstown to the other, and even beyond.
The form of the spectral function associated with Sturm-Liouville problems for small values of the spectral parameter
B. J. Harris
Electronic Journal of Differential Equations , 2013,
Abstract: We study the linear second-order differential equation $$ -y'' + q(x) y = lambda y $$ where, amongst other conditions, $q in L^1[0,infty)$. We obtain a convergent series expansion for the spectral function which is valid for small values of $lambda$. We also derive an asymptotic representation.
Limits from CGRO/EGRET Data on the Use of Antimatter as a Power Source by Extraterrestrial Civilizations
Michael J. Harris
Physics , 2001,
Abstract: I argue that the existence of cold antimatter in bulk is not permitted by the Standard Model, so that if a gamma-ray signature from antiproton annihilation were to be detected, it must represent either new physics or the action of intelligence. Time variability of the signal would strongly support the second alternative. The entire sky was scanned at the relevant energies (30- 928 MeV) by the EGRET experiment on board the Compton Gamma Ray Observatory during 1991-1995. A search of this database for the antiproton annihilation signature yielded only upper limits on the flux (an intriguing spectrum detected from QSO 2206+650 = 3EG J2206+6602 is probably not related to SETI). The all-sky, longterm 99 upper limit is 2.3 x 10^{-8} photon/(cm2 s); it is a factor 10 worse in the Galactic plane due to the higher diffuse gamma-ray background emission. I give brief, but quantitative, illustrations of what this limit means for nearby intelligent activities.
Random walkers with extreme value memory: modelling the peak-end rule
Rosemary J. Harris
Physics , 2015, DOI: 10.1088/1367-2630/17/5/053049
Abstract: Motivated by the psychological literature on the "peak-end rule" for remembered experience, we perform an analysis within a random walk framework of a discrete choice model where agents' future choices depend on the peak memory of their past experiences. In particular, we use this approach to investigate whether increased noise/disruption always leads to more switching between decisions. Here extreme value theory illuminates different classes of dynamics indicating that the long-time behaviour is dependent on the scale used for reflection; this could have implications, for example, in questionnaire design.
Fluctuations in interacting particle systems with memory
Rosemary J. Harris
Physics , 2015, DOI: 10.1088/1742-5468/2015/07/P07021
Abstract: We consider the effects of long-range temporal correlations in many-particle systems, focusing particularly on fluctuations about the typical behaviour. For a specific class of memory dependence we discuss the modification of the large deviation principle describing the probability of rare currents and show how superdiffusive behaviour can emerge. We illustrate the general framework with detailed calculations for a memory-dependent version of the totally asymmetric simple exclusion process as well as indicating connections to other recent work.
A remark on the Schottky locus in genus 4
J. Harris,K. Hulek
Mathematics , 2003,
Abstract: We determine the class of the (closure of the) Schottky locus in genus 4 in the Igusa- and the Voronoi compactification of A_4 and comment on the weight 8 modular form which vanishes on it.
Severi Degrees in Cogenus 3
J. Harris,R. Pandharipande
Mathematics , 1995,
Abstract: In this short note, a new computation of the degree of the locus of 3-nodal plane curves in the linear system of degree d plane curves is given. The answer is expressed as a tautological class on a blow-up of the Hilbert scheme of 3 points in the plane. The class is evaluated by the Bott residue formula.
Curating Knowledge and Curating Fun: An Analysis of the Expanding Roles of Children’s Museums  [PDF]
Sarah C. Harris, Flávio S. Azevedo, Anthony J. Petrosino
Creative Education (CE) , 2018, DOI: 10.4236/ce.2018.912138
Abstract: Museums constantly undergo shifts and changes in the roles and functions they serve in society. We report on the expanding roles of a children’s STEAM museum through a case study of two adult-only, fundraising events that the museum implemented. Drawing on both qualitative and quantitative measures, our analysis pursues two complementary threads. First, we seek to characterize those events in detail so that we might understand the events’ culture and functioning. Second, we look into the population who frequents the events, focusing specifically on various indicators of socio-economic status. By bringing these analytical threads together, we corroborate the finding that museums are expanding into?curating fun?experiences that are highly tailored to certain segments of the adult public. Importantly, attending to the empirical details of such processes, we further find that the observed changes1) directly impact the job demands and require?skills of children’s museum staff, 2) reify?the museum as an important economic agent in the community, and 3) potentially reproduce patterns of inequitable access to STEAM cultural capital, among others.
The almost-sure population growth rate in branching Brownian motion with a quadratic breeding potential
J. Berestycki,E. Brunet,J. W. Harris,S. C. Harris
Mathematics , 2009,
Abstract: In this note we consider a branching Brownian motion (BBM) on $\mathbb{R}$ in which a particle at spatial position $y$ splits into two at rate $\beta y^2$, where $\beta>0$ is a constant. This is a critical breeding rate for BBM in the sense that the expected population size blows up in finite time while the population size remains finite, almost surely, for all time. We find an asymptotic for the almost sure rate of growth of the population.
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