The three species monomer-monomer model in the reaction-controlled limit

We study the one dimensional three species monomer-monomer reaction model in the reaction controlled limit using mean-field theory and dynamic Monte Carlo simulations. The phase diagram consists of a reactive steady state bordered by three equivalent adsorbing phases where the surface is saturated with one monomer species. The transitions from the reactive phase are all continuous, while the transitions between adsorbing phases are first-order. Bicritical points occur where the reactive phase simultaneously meets two adsorbing phases. The transitions from the reactive to an adsorbing phase show directed percolation critical behaviour, while the universal behaviour at the bicritical points is in the even branching annihilating random walk class. The results are contrasted and compared to previous results for the adsorption-controlled limit of the same model.Comment: 12 pages using RevTeX, plus 4 postscript figures. Uses psfig.sty. accepted to Journal of Physics

Exploration of crime-scene characteristics in juvenile homicide in the French-speaking part of Belgium

This study explores modeling crime-scene characteristics of juvenile homicide in the French-speaking part of Belgium. Multidimensional scaling analysis was carried out on crime-scene characteristics derived from the court files of 67 individuals under 22 years old, who had been charged with murder or attempted murder (1995-2009). Three thematic regions (Expressive: multiple offenders; Instrumental: theft; Instrumental: sex/forensic awareness) distinguished types of aggression displayed during the offense. These themes reaffirm that the expressive-instrumental differentiation found in general homicide studies is valuable when attempting to discriminate juvenile homicides. The proposed framework was found useful to classify the offenses, as 84% of homicides were assigned to a dominant theme. Additionally, associations between crime-scene characteristics and offenders' characteristics were analyzed, but no associations were found, therefore failing to provide empirical support for the homology assumption. Cultural comparisons, as well as the influence of age on the thematic structure are discussed

1022-107 Outcome of Different Reperfusion Strategies in Thrombolytic “Eligible” versus “Ineligible” Patients with Acute Myocardial Infarction

Pts considered “not eligible” for inclusion in most early U.S. thrombolytic trials because of advanced age, late presentation, prior CABG or shock have avery poor prognosis; thus, some have suggested broadening the criteria for lyric eligibility. To examine the role of different reperfusion strategies in pts traditionally considered lytic “eligible” vs. “ineligible” (age>70, MI onset>4 hours, or prior CABG), we examined the PAMI database in which 395 pts of any age within 12 hours onset of MI were randomized to t-PA or primary PTCA (pts with shock were excluded). Compared to lyric eligible pts, ineligible pts were o1der(67 vs. 56 yrs, p<0.0001). more frequently female (38% vs. 20%, P<0.0001), diabetic (17% vs. 10%, P=0.03), had prior CABG (8% vs. 0%, P<0.0001), presented later (4.4 vs. 2.2 hours, p<0.0001), and were more likely to present in CI-1F (20% vs. 11%, P=0.01). Endpoints included death (D), reinfarction (R), recurrent ischemic events (RIE) and stroke:Thrombolytic eligibleThrombolytic ineligiblePTCA (n=127)t-PA (n=117)PPTCA (n=68)t-PA (n=83)Pin-hosp. D2.4%1.7%NS2.9%13.3%0.025in-hosp. D or R5.5%9.4%NS4.4%15.7%0.026in-hosp. RIE11.8%29.1%0.00087.4%26.6%0.002in-hasp. stroke0%1.7%NS0%6.0%0.046 month D3.9%1.7%NS2.9%15.7%0.0096 month D or R8.7%12.8%NS7.4%22.9%0.009In conclusion: Pts traditionally considered thrombolytic eligible comprise a low risk cohort, and have a favorable prognosis whether treated with primary PTCA or t-PA. In contrast, pts historically excluded from most early lytic trials because of advanced age, late presentation or prior CABG are at increased risk, and may have improved survival with primary PTCA rather than thrompresented laterbolysis

Nonequilibrium Critical Dynamics of a Three Species Monomer-Monomer Model

We study a three species monomer-monomer catalytic surface reaction model with a reactive steady state bordered by three equivalent unreactive phases where the surface is saturated with one species. The transition from the reactive to a saturated phase shows directed percolation critical behavior. Each pair of these reactive-saturated phase boundaries join at a bicritical point where the universal behavior is in the even branching annihilating random walk class. We find the crossover exponent from bicritical to critical behavior and a new exponent associated with the bicritical interface dynamics.Comment: 4 pages RevTex. 4 eps figures included with psfig.sty. Uses multicol.sty. Accepted for publication in PR

1022-103 Does Primary Angioplasty Improve the Prognosis of Patients with Diabetes and Acute Myocardial Infarction?

To examine the effect of different reperfusion modalities in pts with DM, the multicenter PAMI database was analyzed, in which 395 pts within 12 hours onset of acute MI were prospectively randomized to treatment with t-PA (n=200) vs. primary PTCA (n=195). DM was present in 50 (13%) pts. Compared to pts without DM, pts with DM were older (65 vs. 59 yrs, p=0.002), more often female (40% vs. 25%, p=0.03), more frequently had HTN (68% vs. 39%, P=0.0001), prior CHF (8% vs. 1%, P=0.0001). multivessel disease (76% vs. 51%, P=0.01) and presented later (3.8 vs. 3.0hours, p=0.03).In-hospital mortality was 10.0% in pts with DM vs. 3.8% in pts without DM (p<0.05). By multivariate analysis of 16 variables, however, advanced age and treatment by PTCA rather than t-PA, but not DM correlated with in-hospital mortality.Mortality stratified by treatment appears in the graph. Despite the apparently improved prognosis of pts with DM treated with PTCA vs. t-PA, the p value forthe x2 test for interaction effect between DM and treatment modality was 0.86; most of the benefit of PTCA was present in the elderly population.In conclusionPts with DM and acute MI have increased mortality, primarily because of advanced age. The outcome after PTCA compared to t-PA is improved in DM largely because of PTCA's beneficial effect in the elderly

Optical one-way quantum computing with a simulated valence-bond solid

One-way quantum computation proceeds by sequentially measuring individual spins (qubits) in an entangled many-spin resource state. It remains a challenge, however, to efficiently produce such resource states. Is it possible to reduce the task of generating these states to simply cooling a quantum many-body system to its ground state? Cluster states, the canonical resource for one-way quantum computing, do not naturally occur as ground states of physical systems. This led to a significant effort to identify alternative resource states that appear as ground states in spin lattices. An appealing candidate is a valence-bond-solid state described by Affleck, Kennedy, Lieb, and Tasaki (AKLT). It is the unique, gapped ground state for a two-body Hamiltonian on a spin-1 chain, and can be used as a resource for one-way quantum computing. Here, we experimentally generate a photonic AKLT state and use it to implement single-qubit quantum logic gates.Comment: 11 pages, 4 figures, 8 tables - added one referenc

A Genome-Wide association Study of Obstructive Heart Defects among Participants in the National Birth Defects Prevention Study

Obstructive heart defects (OHDs) share common structural lesions in arteries and cardiac valves, accounting for ~25% of all congenital heart defects. OHDs are highly heritable, resulting from interplay among maternal exposures, genetic susceptibilities, and epigenetic phenomena. A genome-wide association study was conducted in National Birth Defects Prevention Study participants (

The three species monomer-monomer model: A mean-field analysis and Monte Carlo study

We study the phase diagram and critical behavior of a one dimensional three species monomer-monomer surface reaction model. Static Monte Carlo simulations show a phase diagram consisting of a reactive steady state bordered by three equivalent unreactive phases where the surface is saturated with one monomer species. The transitions from the reactive to saturated phases are all continuous, while the transitions between poisoned phases are first-order, with bicritical points where the reactive phase meets two poisoned phases. A mean-field cluster analysis predicts all of the qualitative features of the phase diagram only when correlations up to triplets of adjacent sites are included. Dynamic Monte Carlo simulations show that the transition from the reactive to a saturated phase show critical behavior in the directed percolation universality class, while the bicritical point shows critical behavior in the even branching annihilating random walk class. The crossover from bicritical to critical behavior is also studied.Comment: 16 pages using RevTeX, plus 10 figures. Uses psfig.st