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Search Results: 1 - 10 of 8726 matches for " Elizabeth Sinatra "
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Pregnant Women’s Perceptions of Patient-Provider Communication for Health Behavior Change during Pregnancy  [PDF]
Jenn Leiferman, Elizabeth Sinatra, Jennifer Huberty
Open Journal of Obstetrics and Gynecology (OJOG) , 2014, DOI: 10.4236/ojog.2014.411094
Abstract:

Aim: The primary aim of the project was to conduct focus groups with pregnant women to examine their perceptions on patient and health care provider (HCP) communication during prenatal visits pertaining to health behavioral change. In particular, to determine what types of communication facilitate or prevent patient engagement and adherence to certain health behaviors related to smoking cessation, engagement in physical activity, healthy eating and healthy weight gain, and stress management. Methods: Participants were recruited from the obstetric and midwifery clinics at the University of Colorado Hospital. Twenty-four pregnant, English-speaking women between the ages of 18 and 46 years old, the majority of which had full health insurance coverage, participated in one of three focus groups that were conducted. The transcripts were coded for themes and patterns. Results identified numerous current practices of HCPs, facilitators and barriers in care, and patient recommendations related to effective patient-provider communication. Results: Overall many women received basic information about most health behaviors (i.e. healthy eating, physical activity, and smoking cessation) with the exception of stress management from their HCPs via their introductory information packet. However, typically there was no follow-up beyond receipt of the packet. As a result, women sought information online from numerous sources. Unfortunately, this information often conflicted with HCP provided information, as did the information provided from multiple HCPs in group care settings. A major facilitator of behavioral change pertained to building trust and rapport as it directly enhanced the perceived quality of patient-provider communication on prenatal health behaviors. Across all behaviors, women voiced the need for available resources that were credible and referenced by their HCPs. Conclusions: These findings provide a better understanding of what facilitates and prevents women from engaging in healthy behaviors during their pregnancy, in addition to improving patient and provider communication.

Quantum correlations of two optical fields close to electromagnetically induced transparency
Alice Sinatra
Physics , 2006, DOI: 10.1103/PhysRevLett.97.253601
Abstract: We show that three-level atoms excited by two cavity modes in a $\Lambda$ configuration close to electromagnetically induced transparency can produce strongly squeezed bright beams or correlated beams which can be used for quantum non demolition measurements. The input intensity is the experimental "knob" for tuning the system into a squeezer or a quantum non demolition device. The quantum correlations become ideal at a critical point characterized by the appearance of a switching behavior in the mean fields intensities. Our predictions, based on a realistic fully quantum 3-level model including cavity losses and spontaneous emission, allow direct comparison with future experiments.
Current Issues and Interrogations in Angiosome Wound Targeted Revascularization for Chronic Limb Threatening Ischemia: A Review  [PDF]
Vlad Adrian Alexandrescu, Tommy Sinatra, Coralie Maufroy
World Journal of Cardiovascular Diseases (WJCD) , 2019, DOI: 10.4236/wjcd.2019.93016
Abstract: Despite a lack of solid evidence in applying the angiosome concept (AC) in current chronic limb threatening ischemia (CLTI) treatment, several encouraging results for improved wound healing and less for limb preservation were reported in various consistency studies. Direct revascularization (DR) following the foot angiosomes distribution (whenever feasible) may afford better clinical results compared to angiosome indifferent, or indirect revascularization (IR), however without clear benefit on survival and for major adverse limb events (MALE). Inside this interrogation,?the notable influence of the remnant collaterals, the foot arches, the wound characteristics, and the type of revascularization (bypass versus endovascular) still remain ardent topics. Current evidence suggests that applying DR in daily vascular practice requires practitioners to be committed to every individual hemodynamic variable in a thorough macro- and micro-vascular evaluation of the ischemic foot. It becomes clearer nowadays that not all CLTI foot ulcers hold same ischemic burden and seemingly need specific DR. In the same setting,?a novel wound targeted revascularization (WTR) design was proposed assembling wider circulatory targets than genuine DR notion, as used by some authors. Beyond specific angiosomal artery reperfusion, WTR associates the available arches, the large- and medium-sized collaterals, and the arterial-arterial communicants, in an intentional “source artery” and “collateral” topographic foot revascularization. However,?up to date, the notion of angiosome wound-guided revascularization (DR and WTR) detains only a reserved level of confirmation. As for DR, the WTR equally needs higher levels of evidence allowed by standardized definition, uniform indications, and pertinent results from multicenter larger prospective analysis, before large application.
Binary Mixtures of Bose-Einstein Condensates: Phase dynamics and Spatial Dynamics
Alice Sinatra,Yvan Castin
Physics , 1999, DOI: 10.1007/s100530050042
Abstract: We investigate the relative phase coherence properties and the occurrence of demixing instabilities for two mutually interacting and time evolving Bose-Einstein condensates in traps. Our treatment naturally includes the additional decoherence effect due to fluctuations in the total number of particles. Analytical results are presented for the breathe-together solution, an extension of previously known scaling solution to the case of a binary mixture of condensates. When the three coupling constants describing the elastic interactions among the atoms in the two states are close to each other, a dramatic increase of the phase coherence time is predicted. Numerical results are presented for the parameters of the recent JILA experiments.
Genuine phase diffusion of a Bose-Einstein condensate in the microcanonical ensemble: A classical field study
Alice Sinatra,Yvan Castin
Physics , 2008, DOI: 10.1103/PhysRevA.78.053615
Abstract: Within the classical field model, we find that the phase of a Bose-Einstein condensate undergoes a true diffusive motion in the microcanonical ensemble, the variance of the condensate phase change between time zero and time $t$ growing linearly in $t$. The phase diffusion coefficient obeys a simple scaling law in the double thermodynamic and Bogoliubov limit. We construct an approximate calculation of the diffusion coefficient, in fair agreement with the numerical results over the considered temperature range, and we extend this approximate calculation to the quantum field.
Spatial and temporal coherence of a Bose-condensed gas
Yvan Castin,Alice Sinatra
Physics , 2012,
Abstract: The central problem of this chapter is temporal coherence of a three-dimensional spatially homogeneous Bose-condensed gas, initially prepared at finite temperature and then evolving as an isolated interacting system. A first theoretical tool is a number-conserving Bogoliubov approach that allows to describe the system as a weakly interacting gas of quasi-particles. This approach naturally introduces the phase operator of the condensate: a central actor since loss of temporal coherence is governed by the spreading of the condensate phase-change. A second tool is the set of kinetic equations describing the Beliaev-Landau processes for the quasi-particles. We find that in general the variance of the condensate phase-change at long times $t$ is the sum of a ballistic term $\propto t^2$ and a diffusive term $\propto t$ with temperature and interaction dependent coefficients. In the thermodynamic limit, the diffusion coefficient scales as the inverse of the system volume. The coefficient of $t^2$ scales as the inverse volume squared times the variance of the energy of the system in the initial state and can also be obtained by a quantum ergodic theory (the so-called eigenstate thermalisation hypothesis).
Phase Dynamics of Bose-Einstein Condensates: Losses versus Revivals
Alice Sinatra,Yvan Castin
Physics , 1998, DOI: 10.1007/s100530050206
Abstract: In the absence of losses the phase of a Bose-Einstein condensate undergoes collapses and revivals in time due to elastic atomic interactions. As experiments necessarily involve inelastic collisions, we develop a model to describe the phase dynamics of the condensates in presence of collisional losses. We find that a few inelastic processes are sufficient to damp the revivals of the phase. For this reason the observability of phase revivals for present experimental conditions is limited to condensates with a few hundreds of atoms.
Entropy and the Predictability of Online Life
Roberta Sinatra,Michael Szell
Computer Science , 2013, DOI: 10.3390/e16010543
Abstract: Using mobile phone records and information theory measures, our daily lives have been recently shown to follow strict statistical regularities, and our movement patterns are to a large extent predictable. Here, we apply entropy and predictability measures to two data sets of the behavioral actions and the mobility of a large number of players in the virtual universe of a massive multiplayer online game. We find that movements in virtual human lives follow the same high levels of predictability as offline mobility, where future movements can to some extent be predicted well if the temporal correlations of visited places are accounted for. Time series of behavioral actions show similar high levels of predictability, even when temporal correlations are neglected. Entropy conditional on specific behavioral actions reveals that in terms of predictability negative behavior has a wider variety than positive actions. The actions which contain information to best predict an individual's subsequent action are negative, such as attacks or enemy markings, while positive actions of friendship marking, trade and communication contain the least amount of predictive information. These observations show that predicting behavioral actions requires less information than predicting the mobility patterns of humans for which the additional knowledge of past visited locations is crucial, and that the type and sign of a social relation has an essential impact on the ability to determine future behavior.
Social Diffusion and Global Drift on Networks
Hiroki Sayama,Roberta Sinatra
Computer Science , 2014, DOI: 10.1103/PhysRevE.91.032809
Abstract: We study a mathematical model of social diffusion on a symmetric weighted network where individual nodes' states gradually assimilate to local social norms made by their neighbors' average states. Unlike physical diffusion, this process is not state conservational and thus the global state of the network (i.e., sum of node states) will drift. The asymptotic average node state will be the average of initial node states weighted by their strengths. Here we show that, while the global state is not conserved in this process, the inner product of strength and state vectors is conserved instead, and perfect positive correlation between node states and local averages of their self/neighbor strength ratios always results in upward (or at least neutral) global drift. We also show that the strength assortativity negatively affects the speed of homogenization. Based on these findings, we propose an adaptive link weight adjustment method to achieve the highest upward global drift by increasing the strength-state correlation. The effectiveness of the method was confirmed through numerical simulations and implications for real-world social applications are discussed.
Scanning Electron Microscopy Observation of Adhesion Properties of Bifidobacterium longum W11 and Chromatographic Analysis of Its Exopolysaccaride  [PDF]
Rosanna Inturri, Aldo Stivala, Fulvia Sinatra, Raffaele Morrone, Giovanna Blandino
Food and Nutrition Sciences (FNS) , 2014, DOI: 10.4236/fns.2014.518192
Abstract: Bifidobacterium spp. can produce cell-bound or released exopolysaccharide (EPS) that is a beneficial trait mediating commensal-host interactions. However differences in the physico-chemical characteristics of EPS produced by different strains of Bifidobacterium spp. are determinant in adhesion ability and modulation of immune response. The aim of this study was to investigate the in vitro adhesion characteristics of Bifidobacterium longum W11 to intestinal epithelial cell-line HT-29, by Scanning Electron Microscopy (SEM), and chemical characteristics of its exopolysaccharide using Thin-Layer Chromatography (TLC) analysis. SEM observation showed a good adhesion of B. longum W11 to the HT-29 monolayer that could be increased by the production of exocellular polymers formation. TLC analysis of the purified and hydrolyzed EPS showed that the cell-surface and extracellular polysaccharide were composed mainly of fructose and glucose. Moreover, other sugars were present in smaller quantities. Information from this study on physico-chemical characteristics of EPS of B. longum W11 could contribute to understanding the physiology of bifidobacteria and their interaction with the host.
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