Running Out: Food Insecurity in the LGBT Older Adult Community

While food insecurity has been shown to affect Americans across the lifespan, older adults, defined as individuals over age 65, have one of the highest subpopulation rates of food insecurity. Approximately one out of ten senior only households experience food insecurity nationally (Rabbitt, et al., 2017; Chung et al., 2012). A smaller, less researched faction of the older adult population is the lesbian, gay, bisexual and transgender (LGBT) older adult community. Research has shown that LGBT seniors are significantly poorer than their heterosexual counterparts (Emlet, 2016). LGBT older Americans also experience higher rates of isolation and lower rates of familial and other social support as LGBT seniors are three times more likely to enter older adulthood without having children nor a spouse (Goldberg & Mawn, 2014). Research on general food insecurity has uncovered that low income and reduced social support have been defining indicators for experiencing food insecurity (Rabbitt, et al., 2017) However, less is known regarding food access challenges faced by older adults who identify as LGBT. This qualitative study explores the experiences of ten LGBT older adult community members who self-identify as food insecure. All interviews were audiotaped, transcribed verbatim, and analyzed using common coding techniques. Results highlighted a variety of barriers that limited access and multiple enabling factors. A key finding is the need for food programs that take into account the needs of the older adult population, particularly in regards to food access for individuals with mobility issues. The results can inform program implementation and evaluation to make food access programs equally as effective for older program participants

The Stress Transmission Universality Classes of Periodic Granular Arrays

The transmission of stress is analysed for static periodic arrays of rigid grains, with perfect and zero friction. For minimal coordination number (which is sensitive to friction, sphericity and dimensionality), the stress distribution is soluble without reference to the corresponding displacement fields. In non-degenerate cases, the constitutive equations are found to be simple linear in the stress components. The corresponding coefficients depend crucially upon geometrical disorder of the grain contacts.Comment: 7 pages, 1 figur

Rural Idaho Family Physicians’ Scope of Practice

Context: Scope of practice is an important factor in both training and recruiting rural family physicians. Purpose: To assess rural Idaho family physicians’ scope of practice and to examine variations in scope of practice across variables such as gender, age and employment status. Methods: A survey instrument was developed based on a literature review and was validated by physician educators, practicing family physicians and executives at the state hospital association. This survey was mailed to rural family physicians practicing in Idaho counties with populations of less than 50,000. Descriptive, bivariate and multivariate analyses were employed to describe and compare scope of practice patterns. Results: Responses were obtained from 92 of 248 physicians (37.1% response rate). Idaho rural family physicians reported providing obstetrical services in the areas of prenatal care (57.6%), vaginal delivery (52.2%) and C-sections (37.0%) and other operating room services (43.5%), esophagogastroduodenoscopy (EGD) or colonoscopy services (22.5%), emergency room coverage (48.9%), inpatient admissions (88.9%), mental health services (90.1%), nursing home services (88.0%), and supervision to midlevel care providers (72.5%). Bivariate analyses showed differences in scope of practice patterns across gender, age group and employment status. Binomial logistic regression models indicated that younger physicians were roughly three times more likely to provide prenatal care and perform vaginal deliveries than older physicians in rural areas. Conclusion: Idaho practicing rural family physicians report a broad scope of practice. Younger, employed and female rural family medicine physicians are important subgroups for further study

The IPAC Image Subtraction and Discovery Pipeline for the intermediate Palomar Transient Factory

We describe the near real-time transient-source discovery engine for the intermediate Palomar Transient Factory (iPTF), currently in operations at the Infrared Processing and Analysis Center (IPAC), Caltech. We coin this system the IPAC/iPTF Discovery Engine (or IDE). We review the algorithms used for PSF-matching, image subtraction, detection, photometry, and machine-learned (ML) vetting of extracted transient candidates. We also review the performance of our ML classifier. For a limiting signal-to-noise ratio of 4 in relatively unconfused regions, "bogus" candidates from processing artifacts and imperfect image subtractions outnumber real transients by ~ 10:1. This can be considerably higher for image data with inaccurate astrometric and/or PSF-matching solutions. Despite this occasionally high contamination rate, the ML classifier is able to identify real transients with an efficiency (or completeness) of ~ 97% for a maximum tolerable false-positive rate of 1% when classifying raw candidates. All subtraction-image metrics, source features, ML probability-based real-bogus scores, contextual metadata from other surveys, and possible associations with known Solar System objects are stored in a relational database for retrieval by the various science working groups. We review our efforts in mitigating false-positives and our experience in optimizing the overall system in response to the multitude of science projects underway with iPTF.Comment: 66 pages, 21 figures, 7 tables, accepted by PAS

Crowdsourcing and Human Computation: Systems, Studies and Platforms

Crowdsourcing and human computation are transforming human-computer interaction, and CHI has led the way. The seminal publication in human computation was initially published in CHI in 2004 [1], and the first paper investigating Mechanical Turk as a user study platform has amassed over one hundred citations in two years [5]. However, we are just beginning to stake out a coherent research agenda for the field. This workshop will bring together researchers in the young field of crowdsourcing and human computation and produce three artifacts: a research agenda for the field, a vision for ideal crowdsourcing platforms, and a group-edited bibliography. These resources will be publically disseminated on the web and evolved and maintained by the community

Thermodynamics of an ideal generalized gas:II Means of order α\alpha

The property that power means are monotonically increasing functions of their order is shown to be the basis of the second laws not only for processes involving heat conduction but also for processes involving deformations. In an $L$-potentail equilibration the final state will be one of maximum entropy, while in an entropy equilibrium the final state will be one of minimum $L$. A metric space is connected with the power means, and the distance between means of different order is related to the Carnot efficiency. In the ideal classical gas limit, the average change in the entropy is shown to be proportional to the difference between the Shannon and R\'enyi entropies for nonextensive systems that are multifractal in nature. The $L$-potential, like the internal energy, is a Schur convex function of the empirical temperature, which satisfies Jensen's inequality, and serves as a measure of the tendency to uniformity in processes involving pure thermal conduction.Comment: 8 page