The transiting exoplanet community early release science program for JWST

The James Webb Space Telescope (JWST) presents the opportunity to transform our understanding of planets and the origins of life by revealing the atmospheric compositions, structures, and dynamics of transiting exoplanets in unprecedented detail. However, the high-precision, time-series observations required for such investigations have unique technical challenges, and prior experience with other facilities indicates that there will be a steep learning curve when JWST becomes operational. In this paper we describe the science objectives and detailed plans of the Transiting Exoplanet Community Early Release Science (ERS) Program, which is a recently approved program for JWST observations early in Cycle 1. The goal of this project, for which the obtained data will have no exclusive access period, is to accelerate the acquisition and diffusion of technical expertise for transiting exoplanet observations with JWST, while also providing a compelling set of representative datasets that will enable immediate scientific breakthroughs. The Transiting Exoplanet Community ERS Program will exercise the time-series modes of all four JWST instruments that have been identified as the consensus highest priorities, observe the full suite of transiting planet characterization geometries (transits, eclipses, and phase curves), and target planets with host stars that span an illustrative range of brightnesses. The observations in this program were defined through an inclusive and transparent process that had participation from JWST instrument experts and international leaders in transiting exoplanet studies. Community engagement in the project will be centered on a two-phase Data Challenge that culminates with the delivery of planetary spectra, time-series instrument performance reports, and open-source data analysis toolkits in time to inform the agenda for Cycle 2 of the JWST mission

Examining colorectal cancer survivors’ surveillance patterns and experiences of care: a SEER-CAHPS study

PurposeWe examined associations between experiences of care and adherence to surveillance guidelines among Medicare Fee-For-Service beneficiaries with colorectal cancer (CRC).MethodsUsing linked data from the National Cancer Institute's Surveillance, Epidemiology, and End results (SEER) cancer registry program and the Medicare Consumer Assessment of Healthcare Providers and Systems (CAHPS®) patient experience surveys (SEER-CAHPS), we identified local/regional CRC survivors diagnosed in 1999-2009 aged 65+, who underwent surgical resection and completed a CAHPS survey <36 months of diagnosis. Adherence for a 3-year observation period was defined as receiving a colonoscopy; ≥2 carcinoembryonic antigen (CEA) tests; and each year had ≥2 office visits and ≥1 computerized tomography test.ResultsMany of the 314 participants reported ratings of a 9 or 10 out of 10 for overall care (55.4%), personal doctor (58.6%), health plan (59.6%), and specialist doctor (47.0%). Adherence to post-resection surveillance was 76.1% for office visits, 36.9% for CEA testing, 48.1% for colonoscopy, and 10.3% for CT Imaging. Overall, 37.9% of the sample were categorized as non-adherent (adhering to ≤1 surveillance guideline). In multivariable models, ratings of personal doctor and specialist doctor were positively associated with adherence to office visits, and ratings of personal doctor were associated with adherence overall.ConclusionsFindings point to the potentially important role of patient-provider relationships in adherence to office visits for CRC surveillance. As adherence may increase survival among CRC survivors, further investigation is needed to identify specific components of this relationship that impact office visit adherence, and other potentially modifiable drivers of surveillance guidelines

Nonlinear optical properties of glass

Numerous innovations in photonics have been realized on the basis of nonlinear optical properties, notably in information technologies. Totake advantage of the nonlinear optical properties of glass, multidisciplinary research efforts were necessary, combining optics, glass chemistry,material science, as well as development of optical or electrical polarizations processes. This chapter addresses both fundamental aspects of nonlinear optical responses and also the exploitation of nonlinear optical phenomena in glassy material. It starts by a general introduction to nonlinear optical phenomena and concepts. Then, the specific cases of second and third optical responses in glasses are treated separately and described in detail as a function of the corresponding optical phenomena, the various glass families, and their applications