PAC Classification based on PAC Estimates of Label Class Distributions

A standard approach in pattern classification is to estimate the distributions of the label classes, and then to apply the Bayes classifier to the estimates of the distributions in order to classify unlabeled examples. As one might expect, the better our estimates of the label class distributions, the better the resulting classifier will be. In this paper we make this observation precise by identifying risk bounds of a classifier in terms of the quality of the estimates of the label class distributions. We show how PAC learnability relates to estimates of the distributions that have a PAC guarantee on their $L_1$ distance from the true distribution, and we bound the increase in negative log likelihood risk in terms of PAC bounds on the KL-divergence. We give an inefficient but general-purpose smoothing method for converting an estimated distribution that is good under the $L_1$ metric into a distribution that is good under the KL-divergence.Comment: 14 page

Service Participant Voices in Child Welfare, Children\u27s Mental Health, and Psychotherapy

Service providers are becoming increasingly interested in hearing the views of service participants regarding issues of service delivery. This trend is viewed as progressive and sensitive to the many complex issues facing a diverse service participant population. In order to understand what is known related to this trend, the paper reviews the literature in child welfare, children’s mental health, and psychotherapy where service participant feedback regarding aspects of service delivery has been studied. The findings from the three areas of service delivery are organized into a number of tangible themes. Suggestions for future research in the area of participant voice are noted

32 - Introducing Renewable Energy Through Community-based Engaged Learning

We live in a period where human expansion has put its own existence at risk. Local sustainable development strategies are key in reversing these global effects, but only if they are easily accessible and supported by the community. However, gathering that support can be difficult. Reaching a communal understanding of underlying scientific mechanisms starts at a young age and is difficult to develop without hands-on experiences. Community based engaged learning (C-bEL) programs provide these experiences for community members while simultaneously supplying teaching opportunities for college students. We developed a stand-alone workshop for local Baldwin county schools that utilizes renewable energy demonstrations that adheres to the C-bEL guidelines. With a variety of hands-on demonstrations and activities alongside a backbone presentation, students from local schools interacted with these new concepts using different renewable energy technologies. The workshop concluded with similar questioning as the initial to gauge content comprehension and retention levels. Students showed an increased understanding and comfort with the concepts such as renewable energy and energy efficiency

Don’t turn your back on the symptoms of psychosis : a proof-of-principle, quasi-experimental public health trial to reduce the duration of untreated psychosis in Birmingham, UK

Background: Reducing the duration of untreated psychosis (DUP) is an aspiration of international guidelines for first episode psychosis; however, public health initiatives have met with mixed results. Systematic reviews suggest that greater focus on the sources of delay within care pathways, (which will vary between healthcare settings) is needed to achieve sustainable reductions in DUP (BJP 198: 256-263; 2011). Methods/Design: A quasi-experimental trial, comparing a targeted intervention area with a ‘detection as usual’ area in the same city. A proof-of–principle trial, no a priori assumptions are made regarding effect size; key outcome will be an estimate of the potential effect size for a definitive trial. DUP and number of new cases will be collected over an 18-month period in target and control areas and compared; historical data on DUP collected in both areas over the previous three years, will serve as a benchmark. The intervention will focus on reducing two significant DUP component delays within the overall care pathway: delays within the mental health service and help-seeking delay. Discussion: This pragmatic trial will be the first to target known delays within the care pathway for those with a first episode of psychosis. If successful, this will provide a generalizable methodology that can be implemented in a variety of healthcare contexts with differing sources of delay. Trial registration: http://www.controlled-trials.com/ISRCTN45058713 Keywords: Public mental health campaign, First-episode psychosis, Early detection, Duration of untreated psychosis, Youth mental healt

ADVERTISEMENT SOFTWARE DEVELOPMENT KIT UNBUNDLING

A system described herein enables advertisement software development kits (SDKs) to be unbundled from applications that use advertisement SDKs. The system provides SDK proxy libraries and advertisement services developed based on the advertisement SDKs. The SDK proxy libraries replace original calls to advertisement SDKs with inter-protocol communication (IPC) calls. The advertisements services receive the IPC calls and, in response, generate views that include advertisements. The advertisement services provide the views to the applications. Rather than the application determining the advertisement views and/or clicks, the system described herein enables the advertisement services to validate views and/or clicks of the advertisement separately from the application. In this way, the system described in this disclosure may prevent the applications from generating fake clicks or fake views while preventing the advertisement services from accessing sensitive data collected by the applications

A Review of Ball Lightning Models

Ball lightning is a natural phenomenon that occurs in the atmosphere. However due to its brevity and rarity, its occurrence is not well understood. Three models based on electromagnetic properties are discussed in this paper to explain the rare phenomenon of ball lightning. The first model incorporates the idea of electron bunching, electrons moving with different velocities. This creates a plasma bubble by recombining electrons with ionized gas to form plasma that is stabilized by a standing microwave. The second model explains the idea of streamers being tangled and linked in a magnetic field while stabilized by the conservation of helicity. The third model is a lab created skyrmion that when evaluated exhibits qualities similar to ball lightning

‘Swinging the lead and working the head’ – An explanation as to why mental illness stigma is prevalent in policing

Policing can be injurious to the mental health of those delivering the service. The causes can be operational, organisational or a mixture of both. Mental health related stigma is prevalent within policing; thus, help seeking is avoided. Those who do seek help are often thought to be malingerers. Managers are considered to be ill equipped to identify and support those at risk. The processes and policies that are meant to support recovery do not meet the needs of the officers and staff living and working with mental ill health. Consequently, disclosing a mental health issue is seen as career destroying

Don’t turn your back on the symptoms of psychosis : the results of a proof-of-principle, quasi-experimental intervention to reduce duration of untreated psychosis

Background No evidence based approach to reduce duration of untreated psychosis (DUP) has been effective in the UK. Existing interventions have many components and have been difficult to replicate. The majority of DUP in Birmingham, UK is accounted for by delays within mental health services (MHS) followed by help-seeking delay and, we hypothesise, these require explicit targeting. This study examined the feasibility and impact of an intervention to reduce DUP, targeting help-seeking and MHSs delays. Methods A dual-component intervention, comprising a direct care pathway, for 16-25 year olds, and a community psychosis awareness campaign, using our youth-friendly website as the central hub, was implemented, targeting the primary sources of care pathway delays experienced by those with long DUP. Evaluation, using a quasi-experimental, design compared DUP of cases in two areas of the city receiving early detection vs detection as usual, controlling for baseline DUP in each area. Results DUP in the intervention area was reduced from a median 71 days (mean 285) to 39 days (mean 104) following the intervention, with no change in the control area. Relative risk for the reduction in DUP was 0.74 (95 % CI 0.35 to 0.89; p = .004). Delays in MHSs and help-seeking were also reduced. Conclusions Our targeted approach appears to be successful in reducing DUP and could provide a generalizable methodology applicable in a variety of healthcare contexts with differing sources of delay. More research is needed, however, to establish whether our approach is truly effective

Impact of Social Vulnerability on Diabetes-Related Cardiovascular Mortality in the United States

Background: Social vulnerability impacts the natural history of diabetes as well as cardiovascular disease (CVD). However, there are little data regarding the social vulnerability association with diabetes-related CVD mortality. Methods and Results County-level mortality data (where CVD was the underlying cause of death with diabetes among the multiple causes) extracted from the Centers for Disease Control multiple cause of death (2015-2019) and the 2018 Social Vulnerability Index databases were aggregated into quartiles based on their Social Vulnerability Index ranking from the least (first quartile) to the most vulnerable (fourth quartile). Stratified by demographic groups, the data were analyzed for overall CVD, as well as for ischemic heart disease, hypertensive disease, heart failure, and cerebrovascular disease. In the 5-year study period, 387 139 crude diabetes-related cardiovascular mortality records were identified. The age-adjusted mortality rate for CVD was higher in the fourth quartile compared with the first quartile (relative risk [RR], 1.66 [95% CI, 1.64-1.67]) with an estimated 39 328 excess deaths. Among the youngest age group (<55 years), those with the highest social vulnerability had 2 to 4 times the rate of cardiovascular mortality compared with the first quartile: ischemic heart disease (RR, 2.07 [95% CI, 1.97-2.17]; heart failure (RR, 3.03 [95% CI, 2.62-3.52]); hypertensive disease (RR, 3.79 [95% CI, 3.45-4.17]; and cerebrovascular disease (RR, 4.39 [95% CI, 3.75-5.13]). Conclusions Counties with greater social vulnerability had higher diabetes-related CVD mortality, especially among younger adults. Targeted health policies that are designed to reduce these disparities are warranted