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Search Results: 1 - 10 of 305054 matches for " Matthew J. Geraci "
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Iron Overdose during Pregnancy: Case and Treatment Review  [PDF]
Matthew J. Geraci, Haesuk Heagney
International Journal of Clinical Medicine (IJCM) , 2012, DOI: 10.4236/ijcm.2012.37A126
Abstract:

A 22-year-old pregnant female was transferred to the emergency department having ingested a bottle of iron-containing prenatal vitamins, ondansetron (Zofran?) tablets and alcohol. The patient was hemodynamically stable but suffered from intense bouts of brown, sandy emesis for the first few hours. Investigation revealed the patient ingested 13.57 mg/kg of elemental iron. Due to the initial iron level, history and presentation time whole bowel irrigation was initiated with polyethylene glycol solution. Acute iron toxicity in pregnancy is a medical emergency that can result in multisystem organ failure leading to maternal death and potential fetal demise. High maternal serum iron loads do not affect the developing fetus and are not associated with fetal malformations; however advanced poisoning can lead to maternal death, spontaneous abortions or preterm emergency deliveries. Initial treatment strategies may include whole bowel irrigation using polyethylene glycol electrolyte lavage solution and deferoxamine treatment along with necessary supportive care management. Despite concerns of teratogenicity deferoxamine does not cross the placenta and is regarded as safe for use during pregnancy. Maternal resuscitation must always be the primary objective in acute iron overdoses and, therefore such concern should not delay clinically indicated maternal treatment.

Classical Ising model test for quantum circuits
J. Geraci,D. A. Lidar
Physics , 2009, DOI: 10.1088/1367-2630/12/7/075026
Abstract: We exploit a recently constructed mapping between quantum circuits and graphs in order to prove that circuits corresponding to certain planar graphs can be efficiently simulated classically. The proof uses an expression for the Ising model partition function in terms of quadratically signed weight enumerators (QWGTs), which are polynomials that arise naturally in an expansion of quantum circuits in terms of rotations involving Pauli matrices. We combine this expression with a known efficient classical algorithm for the Ising partition function of any planar graph in the absence of an external magnetic field, and the Robertson-Seymour theorem from graph theory. We give as an example a set of quantum circuits with a small number of non-nearest neighbor gates which admit an efficient classical simulation.
Economic Freedom, Migration and Income Change among U.S. Metropolitan Areas  [PDF]
J. Matthew Shumway
Current Urban Studies (CUS) , 2018, DOI: 10.4236/cus.2018.61001
Abstract:
Even though metropolitan area governments have no control over state level monetary, labor, or fiscal policies, they are able to enact policies designed to enhance local living conditions—however determined. Such policies include local taxes, labor and wage policies, and regulations that can differ substantially from other metropolitan areas even within the same state. Collectively such policies create differing levels of economic freedom, as measured by standardized indices. We examine differences in levels of economic freedom across United States metropolitan areas and explore how these differences affect migration patterns and local aggregate and per capita income changes. We find that those metropolitan areas with higher levels of economic freedom tend to experience net in-migration and positive changes in aggregate and per capita income, although the balance between in-state and out-of-state migration confounds these patterns.
Resonant interaction of trapped cold atoms with a magnetic cantilever tip
Cris Montoya,Jose Valencia,Andrew A. Geraci,Matthew Eardley,John Moreland,Leo Hollberg,John Kitching
Physics , 2015,
Abstract: Magnetic resonance in an ensemble of laser-cooled trapped Rb atoms is excited using a micro- cantilever with a magnetic tip. The cantilever is mounted on a multi-layer chip designed to capture, cool, and magnetically transport cold atoms. The coupling is observed by measuring the loss from a magnetic trap as the oscillating cantilever induces Zeeman state transitions in the atoms. Interfacing cold atoms with mechanical devices could enable probing and manipulating atomic spins with nanometer spatial resolution and single-spin sensitivity, leading to new capabilities in quantum computation, quantum simulation, or precision sensing.
Comparative Correlatives in Italian Sign Language Corrélatifs comparatifs dans la langue des signes italienne
Carlo Geraci
Traitement Automatique des Langues , 2009,
Abstract: Comparative correlative constructions (the more you run, the more you sweat) are widespread across the languages of the world (Taylor, 2006). Nonetheless, the peculiarities of this construction raise questions that challenge our understanding of the syntax of this specific construction and, more broadly, of how the core and the periphery of Universal Grammar (UG) are organized (Culicover and Jackendoff, 1999). To date, no study has investigated the comparative correlative construction in any sign language. The purpose of the present paper is to fill this gap and provide a survey of the main characteristics of comparative correlatives in Italian Sign Language (LIS).
A BQP-complete problem related to the Ising model partition function via a new connection between quantum circuits and graphs
Joseph Geraci
Physics , 2008, DOI: 10.1007/s11128-008-0084-7
Abstract: We present a simple construction that maps quantum circuits to graphs and vice-versa. Inspired by the results of D.A. Lidar linking the Ising partition function with quadratically signed weight enumerators (QWGTs), we also present a BQP-complete problem for the additive approximation of a function over hypergraphs related to the generating function of Eulerian subgraphs for ordinary graphs. We discuss connections with the Ising partition function.
An Introduction To Geometric Prequantization
Joseph Geraci
Mathematics , 2009,
Abstract: Classical mechanics has a natural mathematical setting in symplectic geometry and it may be asked if the same is true for quantum mechanics. More precisely, is it possible to capture certain quantum idiosyncrasies within the symplectic framework of classical mechanics? Beginning with Dirac, the idea of quantizing a classical system involved associating the phase space variables with Hermitian operators which act on some Hilbert space, as well as associating the Poisson bracket on the phase space with the commutator for the operators. Mathematically the phase space is associated with some symplectic manifold $M$ and the non-degenerate 2-form $\omega$, which comes with $M$. Geometric prequantization is a process by which one does this in a mathematically "rigorous" manner and we shall attempt to just introduce the methods here. We do this by exploring this contruction for ($\mathbb{R}^{2n}, \sum_{i=1}^n dp_i \wedge dq_i$) which avoids using complex line bundles in any non-trivial way. One should note however that the Hilbert space one obtains is in fact too "big", in the sense that it has too many functions in order to correspond with actual physically significant Hilbert spaces. Geometric quantization remedies this situation but it should be noted that not all manifolds are prequantizable. We shall not discuss either of these issues however.
Have the Algae-Grazing Fish in the Back Reefs of Jamaica and Grand Cayman Changed in Size? A View across 36 Years  [PDF]
Matthew J. Draud, M. Itzkowitz
Open Journal of Marine Science (OJMS) , 2018, DOI: 10.4236/ojms.2018.82016
Abstract:
The island of Jamaica is often cited as an example of how overfishing has dramatically reduced the sizes of coral reef fishes. To examine the change in fish sizes over a 36-year period, we analyzed data from systematic surveys conducted in 1977 and 2013/14 of the sizes and relative abundances of four common algae-grazing fishes in the shallow backreef habitats of Jamaica and Grand Cayman. The four species are: striped parrotfish (Scarus iseri), stoplight parrotfish (Sparisoma viride), ocean surgeon (Acanthurus tractus) and the blue tang (Acanthurus coeruleus). We predicted that all four species would be larger in Grand Cayman than in Jamaica in 1977 as well as in 2013/14, because Grand Cayman has been cited as having less fishing pressure than Jamaica. For the same reason, we expected all four species would have declined in size over the 36 years in Jamaica but not in Grand Cayman. Furthermore, we predicted that the compressed body shape of the ocean surgeon and the blue tang would have made them especially vulnerable to net and trap fishing compared to the two parrotfishes, and that accordingly the effects of overfishing would be greater in these two species. We rejected this hypothesis. The size distributions of the laterally compressed species changed significantly on both islands over the 36-year time span, although not as predicted. At both islands, the blue tangs shifted toward smaller sizes and the ocean surgeons shifted toward larger sizes. There were no size distribution changes detected in the two fusiform species. There was also no support for the prediction that the sizes of these four species were larger in Grand Cayman than in Jamaica during either time period.
Constraints on Yukawa-Type Deviations from Newtonian Gravity at 20 Microns
S. J. Smullin,A. A. Geraci,D. M. Weld,J. Chiaverini,S. Holmes,A. Kapitulnik
Physics , 2005, DOI: 10.1103/PhysRevD.72.129901
Abstract: Recent theories of physics beyond the standard model have predicted deviations from Newtonian gravity at short distances. In order to test these theories, we have a built an apparatus that can measure attonewton-scale forces between gold masses separated by distances on the order of 25 microns. A micromachined silicon cantilever was used as the force sensor, and its displacement was measured with a fiber interferometer. We have used our measurements to set bounds on the magnitude alpha and length scale lambda of Yukawa-type deviations from Newtonian gravity; our results presented here yield the best experimental limit in the range of lambda=6--20 microns.
Cardiac tamponade due to group a streptococcal pericarditis in a 10-month-old boy and a review of the literature  [PDF]
Matthew C. Schwartz, Matthew J. Gillespie, Paul Stephens, Brian Fisher
Open Journal of Pediatrics (OJPed) , 2011, DOI: 10.4236/ojped.2011.14020
Abstract: Group A streptococcus (GAS) is a rare cause of purulent pericarditis in pediatric patients as only 7 cases have been reported. We present a 10-month-old boy who developed cardiac tamponade from GAS and was successfully treated with subxiphoid tube drainage and 4 weeks of antibiotics at the Children’s Hospital of Philadelphia.
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