Computational ghost imaging using deep learning

Computational ghost imaging (CGI) is a single-pixel imaging technique that exploits the correlation between known random patterns and the measured intensity of light transmitted (or reflected) by an object. Although CGI can obtain two- or three- dimensional images with a single or a few bucket detectors, the quality of the reconstructed images is reduced by noise due to the reconstruction of images from random patterns. In this study, we improve the quality of CGI images using deep learning. A deep neural network is used to automatically learn the features of noise-contaminated CGI images. After training, the network is able to predict low-noise images from new noise-contaminated CGI images

Conducción y valor empresarial en Brasil (y Chile)

(Disponible en idioma inglés únicamente) En este trabajo se elabora un índice de prácticas de conducción empresarial (CGI, por sus siglas en inglés) basándose en un conjunto de 24 preguntas que se pueden responder objetivamente a partir de información disponible públicamente. El objetivo es cuantificar la calidad general de las prácticas de conducción empresarial del mayor número posible de compañías. Los niveles del CGI en Brasil han venido mejorando con el tiempo, y un análisis de sus componentes indica que las compañías brasileñas tienen un desempeño mucho mejor en cuanto a la información que suministran que en cuanto a otros aspectos de la gestión empresarial. En este trabajo se hallan niveles sumamente elevados de concentración de derechos de voto, apalancados por el uso generalizado de estructuras de control indirecto y acciones sin derecho a voto. No se hallan indicios ni de afianzamiento firme ni de incentivos en cuanto al uso de porcentajes de propiedad en Brasil, pero sí se hallan indicios de que la separación del control de los derechos sobre el flujo de caja destruye el valor. El CGI mantiene una relación positiva, significativa y robusta con el valor de la empresa. Una mejora de peor a mejor en el CGI en 2002 conduciría a un aumento de 0,38 del coeficiente de Tobin, lo cual representa un aumento de 95% del valor de la acción de una compañía con apalancamiento promedio y las proporciones del coeficiente de Tobin. Tomando en cuenta nuestro coeficiente CGI más bajo, un aumento de un punto del CGI conduciría a un aumento de 6,8% del precio de la acción de la compañía promedio en 2002. No se halló relación significativa alguna entre la conducción empresarial y el pago de dividendos. Los resultados se ponen en contexto mediante un análisis comparativo con Chile.

CGIwithR: Facilities for processing web forms using R

CGIwithR is a package for use with the R statistical computing environment, to facilitate processing of information from web-based forms, and reporting of results in the Hypertext Markup Language (HTML), through the Common Gateway Interface (CGI). CGIwithR permits the straightforward use of R as a CGI scripting language. This paper serves as an extended user manual for CGIwithR, supplementary to the R help pages installed with the package.

Hearing the shape of a room

PMCID: PMC3725052The final published version of this article can be found here: www.pnas.org/cgi/doi/10.1073/pnas.130993211

Computerized Response Inhibition Training For Children With Trichotillomania

Evidence suggests that trichotillomania is characterized by impairment in response inhibition, which is the ability to suppress pre-potent/dominant but inappropriate responses. This study sought to test the feasibility of computerized response inhibition training for children with trichotillomania. Twenty-two children were randomized to the 8-session response inhibition training (RIT; n = 12) or a waitlisted control (WLT; n = 10). Primary outcomes were assessed by an independent evaluator, using the Clinical Global Impression-Improvement (CGI-I), and the NIMH Trichotillomania Severity (NIMH-TSS) and Impairment scales (NIMH-TIS) at pre, post-training/waiting, and 1-month follow-up. Relative to the WLT group, the RIT group showed a higher response rate (55% vs. 11%) on the CGI-I and a lower level of impairment on the NIMH-TIS, at post-training. Overall symptom reductions rates on the NIMH-TSS were 34% (RIT) vs. 21% (WLT) at post-training. The RIT\u27s therapeutic gains were maintained at 1-month follow-up, as indicated by the CGI-I responder status (= 66%), and a continuing reduction in symptom on the NIMH-TSS. This pattern of findings was also replicated by the 6 waitlisted children who received the same RIT intervention after post-waiting assessment. Results suggest that computerized RIT may be a potentially useful intervention for trichotillomania

WFIRST Coronagraph Technology Requirements: Status Update and Systems Engineering Approach

The coronagraphic instrument (CGI) on the Wide-Field Infrared Survey Telescope (WFIRST) will demonstrate technologies and methods for high-contrast direct imaging and spectroscopy of exoplanet systems in reflected light, including polarimetry of circumstellar disks. The WFIRST management and CGI engineering and science investigation teams have developed requirements for the instrument, motivated by the objectives and technology development needs of potential future flagship exoplanet characterization missions such as the NASA Habitable Exoplanet Imaging Mission (HabEx) and the Large UV/Optical/IR Surveyor (LUVOIR). The requirements have been refined to support recommendations from the WFIRST Independent External Technical/Management/Cost Review (WIETR) that the WFIRST CGI be classified as a technology demonstration instrument instead of a science instrument. This paper provides a description of how the CGI requirements flow from the top of the overall WFIRST mission structure through the Level 2 requirements, where the focus here is on capturing the detailed context and rationales for the CGI Level 2 requirements. The WFIRST requirements flow starts with the top Program Level Requirements Appendix (PLRA), which contains both high-level mission objectives as well as the CGI-specific baseline technical and data requirements (BTR and BDR, respectively)... We also present the process and collaborative tools used in the L2 requirements development and management, including the collection and organization of science inputs, an open-source approach to managing the requirements database, and automating documentation. The tools created for the CGI L2 requirements have the potential to improve the design and planning of other projects, streamlining requirement management and maintenance. [Abstract Abbreviated]Comment: 16 pages, 4 figure

Risk and protective factors for release in outpatients with schizophrenia

eposterWe aim to determine risk and protective factors influencing relapse incidence in outpatient with schizophrenia. A longitudinal, observational study was done with outpatients with schizophrenia (F20) or schizoaffective disorder (F25)(DMS-IV and ICD-10), without hospitalization during the previous 6 months. The patients were consecutively included into the study to received oral (O-A) or long-acting injectable (depot-A) antipsychotics. Clinical stage evolution, compliance, efficacy and safety assessments (including PANSS, CGI-SSI, hospitalization rates, and adverse events) were recorded before and after 6 and 12 months of treatment. Results: 60 outpatients (aged 34.5±8.9, male 73%), 75% schizophrenia and 25% schizoaffective disorder diagnosis, 68.3% fewer than 15 years of schizophrenia evolution, 76.7% fewer than 5 times previous hospitalizations were treated with O-A (41.7%) or depot-A (58.3%) antipsychotics for at least one year. Depot-A treated patients showed a significant higher compliance compared to O-A patients during the all following time, lower PANSS (total, positive and negative) scores and CGI-SSI score (p<0.01), and a delayed relapse incidence and re-hospitalization to more than 1 year in the 48% of patients (relapse % depot/% oral) after 6 months 22.9%/52.0%, and after 12 months 48.6%/4.0%. Conclusion: There were protective factors which delayed relapse incidence in schizophrenia: Use of sustained-release preparations, family support. There were risk factors for occurrence of relapse in schizophrenia: cocaine, heroin and alcohol consumption, absence of family support, greater severity of patients assessed through CGI-SI, male sex, age older than 25 years and long-term evolution of the disorder.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech