An essay on the burden of proof

This essay answers two questions: what is a burden of proof, and when is it reasonable to assign a burden of proof? After showing the importance of how we answer these questions, it uses the Western legal tradition as the starting point and paradigm for a normative account of burden of proof. It is normative because it argues that a reasonable burden of prove presupposes the existence of objective rights and obligations. On the account, the burden is a conditional demand for sufficient evidence and is reasonable if its correlative presumption is reasonable. A presumption, e.g., the presumption of innocence in law, is taken as a conditional acceptance of a proposition. What makes a presumption reasonable is a person or group of persons having a conditional right or obligation to accept the proposition in question, i.e., to act as if it is true. After presenting the account's explanatory power and the sources from which rights and obligations may arise, this essay shows how the burden of proof may apply in non-legal settings. It concludes by applying the account to the question whether believers in God bear a burden to prove their position, arguing that there is no such burden.Abstract from public.pdf

Experimental and Computational Investigation of Plume Surface Interactions in Vacuum Microgravity

Plume surface interactions (PSI) are caused by rocket exhaust impinging on planetary surfaces. PSI-induced environmental changes pose hazards to spacecraft and astronauts; thus, it is crucial to understand the gas-particle dynamics of these systems. We have conducted novel experimental and computational work to study PSI effects in relevant vacuum microgravity environments. To study flow effects and regolith instability we developed a computational model that describes the gas flow through a porous medium based on Darcy\u27s Law. This flow depends on regolith properties, and the resulting subsurface pressure distribution is used to estimate ejecta mass. We find flow behaviors and the resulting ejecta are significantly affected by the surface pressure distribution, pulse duration, and material properties. We have also developed an experimental apparatus, the Gas Regolith Interaction Testbed (GRIT), for studying PSI in vacuum microgravity in the UCF Center for Microgravity Research Drop Tower. It consists of a small, cylindrical vacuum chamber in which a cold gas jet interacts with a bed of regolith simulant. Video data is analyzed to determine PSI trends based on gravity level, nozzle distance, simulant type, and plume duration. We observe PSI effects ranging from perturbation of the granular media to ejection of the entire simulant mass. Phenomena are significantly more pronounced for experiments conducted at microgravity than at Earth gravity (1g). We measure peak ejecta velocities up to tens of m/s, and note how particle properties, jet distance, and pulse duration affect ejecta angle and cratering depth. Our numerical and experimental results have implications for the validity of existing studies of PSI that are conducted in 1g and under ambient conditions, and can be used to inform modeling, lander design, and risk assessment for future missions that will aim to land on or interact with planetary surfaces

Levels of wellbeing, resilience, and physical activity amongst Irish pre-service teachers: a baseline study

The current study examines the wellbeing, resilience and physical activity (PA) levels among Irish pre-service teachers. Participants were a sample of 128 higher education students (29% male; 71% female; mean age range 18–27 years old) who completed a self-report questionnaire, using a combination of established instruments for wellbeing, resilience, and PA. Descriptive data revealed that 39.1% presented with low levels of resilience, and 74% were not meeting the PA guidelines for health. One sample t-tests further revealed the sample population of higher education students had lower wellbeing (t (127) = −3.05, p = .003) and resilience (t (127) = −6.48, p = .003) levels, when compared to the population normative data. Results from the existing study suggest that a structured mental health and PA education awareness intervention for Irish pre-service teachers may be warranted, specifically to increase the lower than expected levels of resilience. The existing sample of pre-service teachers are at a critical time of transition, as they move forward into a profession where self-awareness of wellbeing is required at the beginning of their careers to sustain health both inside and outside of the classroom

Mental fitness in higher education: Intervention Mapping programme design

Purpose: Higher Education Institutions observe that many students are experiencing mental health issues, such as high levels of anxiety and stress. Young adults are recognised as a vulnerable group who carry the burden of mental health problems worldwide. Mental health interventions can be effective in positively influencing students' emotional and behavioural wellbeing. Design/methodology/approach: In the current study, the principles of Intervention Mapping (IM) were applied to guide the development, implementation, and evaluation of a specifically tailored mental health programme for a selected student cohort in a large Higher Education Institute in Ireland. Mixed qualitative (Delphi technique and focus group discussions) and quantitative (survey) data were gathered to gain a broad perspective of mental health concerns and learning needs among a sample of higher education students (n = 99). Findings: Existing evidence guided by theoretical frameworks were blended to create a specifically tailored mental health programme to meet the needs of higher education students in Ireland. Results indicate that the established six-stages of IM provide an empirical process that has the potential to effectively respond to the mental health needs of students in higher education. IM identifies the priority needs of students in higher education and ensures that suitable behaviour change techniques for mental health are addressed. 10; Originality/value: IM is a suitable method to critically and collaboratively develop a mental health intervention for the overall wellbeing of the general higher education student population, both nationally and globally

Relationship between gender, physical activity, screen time, body mass index and wellbeing in Irish children from social-disadvantage

Research has shown that childhood physical activity participation has a positive relationship with markers of wellbeing, such as self-esteem and quality of life, and physical activity participation may serve as protective mechanism against some mental illnesses including depression. The aim of the current study was to examine the relationship between gender, physical activity, screen time, body mass index and wellbeing in Irish school children (N = 705; mean age: 8.74 ± 0.52 years) from social disadvantage. In Northern Ireland, schools included in the 2010 Multiple Deprivation Measure (NIMDM) were invited to participate. Schools included for participation in the Republic of Ireland were from the Delivering Equality of Opportunity in Schools (DEIS) index. Data gathered included accelerometry (physical activity), self-report (screen time and wellbeing), and anthropometric measurements. Physical activity was objectively measured during eight consecutive days using Actigraph GT1M and GT3X devices, using stringent accelerometer protocol. Screen time activities were derived using questions adapted from the Health Promotion Agencies National Children’s Survey in Northern Ireland. The KIDSCREEN-27 is a health-related quality of life measurement, and this tool was used by participants to self-report their health and wellbeing. Results suggest that boys accumulated more minutes of daily screen time than girls, however, boys were more physically active when compared to girls. Wellbeing scores for gender showed inverse associations with daily screen time. Standard multiple regression revealed that gender, physical activity, screen time and body mass index (combined) explained little variance in the prediction of wellbeing. Results indicate the importance of gender-based considerations for physical activity and screen time with children from social disadvantage. The inverse relationship found between overall screen time and wellbeing will help guide future healthy lifestyle interventions for Irish children of low-income communities

Automated Additive Construction (AAC) for Earth and Space Using In-situ Resources

Using Automated Additive Construction (AAC), low-fidelity large-scale compressive structures can be produced out of a wide variety of materials found in the environment. Compressionintensive structures need not utilize materials that have tight specifications for internal force management, meaning that the production of the building materials do not require costly methods for their preparation. Where a certain degree of surface roughness can be tolerated, lower-fidelity numerical control of deposited materials can provide a low-cost means for automating building processes, which can be utilized in remote or extreme environments on Earth or in Space. For space missions where every kilogram of mass must be lifted out of Earth’s gravity well, the promise of using in-situ materials for the construction of outposts, facilities, and installations could prove to be enabling if significant reduction of payload mass can be achieved. In a 2015 workshop sponsored by the Keck nstitute for Space Studies, on the topic of Three Dimensional (3D) Additive Construction For Space Using In-situ Resources, was conducted with additive construction experts from around the globe in attendance. The workshop explored disparate efforts, methods, and technologies and established a proposed framework for the field of Additive Construction Using In-situ Resources. This paper defines the field of Automated Additive Construction Using In-situ Resources, describes the state-of-the-art for various methods, establishes a vision for future efforts, identifies gaps in current technologies, explores investment opportunities, and proposes potential technology demonstration missions for terrestrial, International Space Station (ISS), lunar, deep space zero-gravity, and Mars environments

WFIRST Grism Characterization

We had presented the optical design and early test result of WFIRST grism spectrometer in previous SPIE conferences. This paper reports the follow-on activity of the spectral and radiometric calibrations, including the calibration methods, experiment designs, and test equipment calibration, such as the light source and detectors used in the test. The real grism calibration includes the throughput versus wavelength, which is largely determined by the diffraction efficiency of the two diffractive surfaces. It also includes spectral resolution, point spread function, and encircle energy measurements. The measured data are presented. The comparisons between the test data and the simulation from theory or optical model are also presented

The effect of sport for LIFE: all island in children from low socio-economic status: a clustered randomized controlled trial

Abstract Background School-based interventions offer the opportunity to increase physical activity, health-related quality of life (HRQOL) and nutritional behaviours, yet methodological limitations hinder current research, particularly among under-represented children from low socio-economic status (SES). The aim was to determine the effect of a 12-week physical activity programme, Sport for LIFE: All Island (SFL:AI), on physical activity levels, HRQOL, and nutritional attitudes and behaviours in children of low SES across the island of Ireland. Methods A 2 (groups) × 4 (data collection points) clustered randomised controlled trial was conducted comprising an intervention group who received SFL:AI for 12 weeks, and a waiting-list control condition. In total 740 children (381 boys, 359 girls) aged 8–9 years (mean = 8.7; SD = .50) from 27 schools across four regions of Ireland (Ulster, Leinster, Connacht and Munster) took part. Physical activity was measured by accelerometers, and children completed a validated questionnaire at baseline, mid (i.e. 6-weeks), post-intervention (i.e. 12 weeks) and follow-up (i.e. 3 months post-intervention). Results No significant interaction effects for the intervention were found on any of the study outcomes. Main effects were reported for physical well-being, parental relations and autonomy and financial resources, as well as sweetened beverages, environment and intake, and attitude to vegetables. However, these changes were not statistically attributable to the intervention. Conclusions It remains unclear if school-based physical activity interventions can improve HRQOL through physical activity with children from low SES. Logistical and methodological considerations are outlined to explore the null effect of the programme, and to provide suggestions for future research and practice. Trial registration Trial registration number: ISRCTN76261698. Name of registry: ICRCTN. Date of registration: 23/08/2017. Date of enrolment: September 2014

Icarus Falls: The Coal Health Scandal

The handling of cases under the Coal Health Compensation Schemes, set up in 1999 to compensate miners suffering from workplace medical conditions, resulted in over 100 solicitors from more than 30 firms facing disciplinary proceedings. Three were struck off, three suspended and over forty fined following the largest investigation ever mounted by the regulator. This article examines the political and regulatory context of the scandal, describes one of the cases presented to the Solicitors' Disciplinary Tribunal and examines the relevance of theories of transgression to professional disciplinary matters. It concludes by considering the regulatory impacts and implications of the scandal

Simplicity in Visual Representation: A Semiotic Approach

Simplicity, as an ideal in the design of visual representations, has not received systematic attention. High-level guidelines are too general, and low-level guidelines too ad hoc, too numerous, and too often incompatible, to serve in a particular design situation. This paper reviews notions of visual simplicity in the literature within the analytical framework provided by Charles Morris' communication model, specifically, his trichotomy of communication levels—the syntactic, the semantic, and the pragmatic. Simplicity is ultimate ly shown to entail the adjudication of incompatibilities both within, and between, levels.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/68281/2/10.1177_105065198700100103.pd