Iterative maximum-likelihood reconstruction in quantum homodyne tomography

I propose an iterative expectation maximization algorithm for reconstructing a quantum optical ensemble from a set of balanced homodyne measurements performed on an optical state. The algorithm applies directly to the acquired data, bypassing the intermediate step of calculating marginal distributions. The advantages of the new method are made manifest by comparing it with the traditional inverse Radon transformation technique

Achievable efficiencies for probabilistically cloning the states

We present an example of quantum computational tasks whose performance is enhanced if we distribute quantum information using quantum cloning. Furthermore we give achievable efficiencies for probabilistic cloning the quantum states used in implemented tasks for which cloning provides some enhancement in performance.Comment: 9 pages, 8 figure

Descritpion of Exotic Nuclei Using Continuum Shell Model

In weakly bound exotic nuclei, number of excited bound states or narrow resonances is small and, moreover, they couple strongly to the particle continuum. Hence, these systems should be described in the quantum open system formalism which does not artificially separate the subspaces of (quasi-) bound and scattering states. The Shell Model Embedded in the Continuum provides a novel approach which solves this problem. Examples of application in sd-shell nuclei will be presented.Comment: Presented at the NATO Advanced Research Workshop Brijuni, Pula, Croatia, June 2-5, 200

The effect of overconfidence and underconfidence on consumer value

Although the effect of knowledge miscalibration (i.e., the inaccuracy in subjective knowledge relative to objective knowledge) on consumer purchase decisions has been investigated, its effect in the usage stage of consumption is little understood. This paper examines the effect of knowledge miscalibration in terms of both overconfidence (i.e., when subjective knowledge is inflated) and underconfidence (i.e., when subjective knowledge is deflated) on the dimensions of consumer value (i.e., efficiency, excellence, play and aesthetics). We make the case that overconfidence and underconfidence should be treated separately as they trigger different consumption consequences. Several hypotheses are tested through two studies: a co-variance based study (Study 1) and an experimental study (Study 2). In Study 1, overconfidence and underconfidence are measured, while in Study 2 they are experimentally manipulated. Findings of both studies show that underconfidence negatively influences efficiency, excellence and aesthetics, and overconfidence negatively influences play. Also, Study 1 finds a negative effect of underconfidence on play and Study 2 finds a negative effect of overconfidence on excellence and aesthetics. Findings reveal that knowledge miscalibration negatively impacts consumers’ usage experiences. This implies that in designing product or service experiences, suppliers benefit from ensuring that consumers achieve a reduced level of knowledge miscalibration

Female genital mutilation/cutting in Sierra Leone: are educated women intending to circumcise their daughters?

BACKGROUND:Female genital mutilation/cutting (FGM/C) has been recognized as a gross violation of human rights of girls and women. This is well established in numerous international legal instruments. It forms part of the initiation ceremony that confers womanhood in Sierra Leone. Girls and women who are subjected to this practice are considered to be ready for marriage by their parents and communities and are rewarded with celebrations, gifts, and public recognition. Following this, we examined the relationship between education and women's FGM/C intention for their daughters in Sierra Leone. METHODS:We used cross-sectional data from the women's file of the 2013 Sierra Leone Demographic and Health Survey (SLDHS) to explore the influence of education on FGM/C intention among women in the reproductive age (15-49). A sample of 6543 women were included in the study. Our analysis involved descriptive computation of education and FGM/C intention. This was followed by a two-level multilevel analysis. Fixed effect results were reported as Odds Ratios and Adjusted Odds Ratios with their respective credible intervals (CrIs) whilst results of the random effects were presented as variance partition coefficients and median odds ratios. RESULTS:Our findings showed that women who had no formal education were more likely to intend to circumcise their daughters [aOR = 4.3, CrI = 2.4-8.0]. Among the covariates, women aged 20-24 [aOR = 2.3, CrI = 1.5-3.4] were more likely to intend to circumcise their daughters compared to women between 45 and 49 years old. Poorest women were more likely to report intention of circumcising their daughters in the future compared with the richest [aOR = 2.1, CrI = 1.3-3.2]. We noted that, 63.3% of FGM/C intention in Sierra Leone is attributable to contextual factors. CONCLUSION:FGM/C intention is more common among women with no education, younger women as well as women in the lowest wealth category. We recommend segmented female-child educational and pro-poor policies that target uneducated women in Sierra Leone. The study further suggests that interventions to end FGM/C need to focus on broader contextual and social norms in Sierra Leone

Nutritional status in elderly people admitted to community residential homes: comparisons between two cohorts

The aim was to describe nutritional status and socio-demographic and medical data in people who were newly admitted to community residential homes (cohort 2), and to compare the results with a previous study performed in the same municipality four years earlier (cohort 1). One hundred and twenty-seven people, 65 years of age, or older, newly admitted to residential homes in a municipality in the southern part of Sweden, were consecutively included. Nutritional status was assessed, using a combination of anthropometry and serum protein measurements and by Mini Nutritional Assessment (MNA). The results showed that 32% of the residents in cohort 2 were assessed as protein-energy malnourished (PEM), compared with 38% in cohort 1. Body mass index, psychological stress or acute disease, and reduced fluid intake were items in MNA which had power to predict PEM. Residents in cohort 2, diagnosed as having severe medical diseases, increased as well as residents with neuropsychological problems. Simultaneously, the number living in residential homes decreased, as compared to cohort 1. These differences indicate that the admission criteria have changed between cohorts 1 and 2

Increased susceptibility to Trichuris muris infection and exacerbation of colitis in Mdr1a-/- mice

AIM: To investigate the influence of Trichuris muris (T. muris ) infection in a mouse model of genetic susceptibility to inflammatory bowel disease, Mdr1a-/-. METHODS: Mdr1a-/- mice were housed under specific pathogen free conditions to slow the development of colitis and compared to congenic FVB controls. Mice were infected with approximately 200 embryonated ova from T. muris and assessed for worm burden and histological and functional markers of gut inflammation on day 19 post infection. RESULTS: Mdr1a-/- mice exhibited a marked increase in susceptibility to T. muris infection with a 10-fold increase in colonic worm count by day 19 pi compared to FVB controls. Prior to infection, Mdr1a-/- exhibited low-level mucosal inflammation with evidence of an enhanced Th1 environment. T. muris infection accelerated the progression of colitis in Mdr1a-/- as evidenced by marked increases in several indicators including histological damage score, mucosal CD4+ T-cell and DC infiltration and dramatically increased production of proinflammatory cytokines. CONCLUSION: These data provide further evidence of the complex interaction between T. muris and an inflammatory bowel disease (IBD)-susceptible host which may have relevance to the application of helminth therapy in the treatment of human IBD

Educating Enough Competent Health Professionals: Advancing Educational Innovation at Muhimbili University of Health and Allied Sciences, Tanzania.

Sarah MacFarlane and colleagues share their lessons engaging in educational reform and faculty development with the Muhimbili University of Health and Allied Sciences in Tanzania and the University of California San Francisco