The role of fingerprints in the coding of tactile information probed with a biomimetic sensor

In humans, the tactile perception of fine textures (spatial scale <200 micrometers) is mediated by skin vibrations generated as the finger scans the surface. To establish the relationship between texture characteristics and subcutaneous vibrations, a biomimetic tactile sensor has been designed whose dimensions match those of the fingertip. When the sensor surface is patterned with parallel ridges mimicking the fingerprints, the spectrum of vibrations elicited by randomly textured substrates is dominated by one frequency set by the ratio of the scanning speed to the interridge distance. For human touch, this frequency falls within the optimal range of sensitivity of Pacinian afferents, which mediate the coding of fine textures. Thus, fingerprints may perform spectral selection and amplification of tactile information that facilitate its processing by specific mechanoreceptors.Comment: 25 pages, 11 figures, article + supporting materia

Evaluating the efficacy of digital games to develop communication skills in an arts environment

Much has been written about the theoretical potential of digital games to transform teaching and learning and to offer new forms of digital assessment; yet the education system in the United Kingdom (UK) is arguably still focused exclusively on the assessment and reward of individual effort and achievement. This can be at odds with the requirements of twenty-first century working environments and in the requirements for developing the personal employability characteristics of students. Engaging students in authentic collaborative project work that requires sophisticated and coordinated communication can present real challenges. Employers are increasingly demanding as prerequisite that graduates have highly developed communication and collaborative team working skills for opportunities in the digital industries such as Games Design, however Games Design students are often quite isolated in their personal industry related practice, working methods and their online lifestyles and lack the "soft skills" which would enable them to work successfully within a team. The authors elaborate on how Hull School of Art and Design has attempted to address this problem through the implementation of an Applied Game, the "Watercooler Game", for their Games Industry undergraduates. They present their reflections on the rationale behind the pedagogic approach, the decision to develop an applied game to address their pedagogic challenges and their experience of working with a commercial Games Developer in producing the game. Using a sophisticated evaluation framework, devised as part of the EU Horizon 2020 funded Realising an Applied Gaming Eco-system (RAGE) project, the authors present the initial findings of their evaluation of game from a multidimensional perspective. The pedagogic approach, the technical approach adopted by the developers of the game (an open source asset based approach) and the pedagogic efficacy of the game through evaluation of the learning objectives achieved and how these finding may be applicable in a wider educational context

The "Water Cooler" game

Much has been written about the theoretical potential of digital games to transform teaching and learning and to offer new forms of digital assessment; yet the education system in the United Kingdom (UK) is arguably still focused exclusively on the assessment and reward of individual effort and achievement. This can be at odds with the requirements of twenty-first century working environments and in the requirements for developing the personal employability characteristics of students. Engaging students in authentic collaborative project work that requires sophisticated and coordinated communication can present real challenges. Employers are demanding, as prerequisite, that graduates have highly developed communication and collaborative team working skills for opportunities in the digital industries such as Games Design, however Games Design students are often quite isolated in their personal industry related practice, working methods and their online lifestyles and lack the “soft skills” which would enable them to work successfully within a team. In this paper, the authors elaborate on how Hull School of Art and Design has attempted to address this problem through the implementation of an Applied Game, the “Watercooler Game”, for their Games Industry undergraduates. They present their reflections on the rationale behind the pedagogic approach, the decision to develop an applied game to address their pedagogic challenges and their experience of working with a commercial Games Developer in producing the game. The authors present the initial findings of their evaluation of game from a multidimensional perspective. The pedagogic approach (using applied games with a selected small cohort of students), the technical approach adopted by the developers of the game (an open source asset based approach) and the pedagogic efficacy of the game through evaluation of the learning objectives achieved by a cohort of seventy learners situated in the College’s School of Art and Design

Contact Force and Scanning Velocity during Active Roughness Perception

Haptic perception is bidirectionally related to exploratory movements, which means that exploration influences perception, but perception also influences exploration. We can optimize or change exploratory movements according to the perception and/or the task, consciously or unconsciously. This paper presents a psychophysical experiment on active roughness perception to investigate movement changes as the haptic task changes. Exerted normal force and scanning velocity are measured in different perceptual tasks (discrimination or identification) using rough and smooth stimuli. The results show that humans use a greater variation in contact force for the smooth stimuli than for the rough stimuli. Moreover, they use higher scanning velocities and shorter break times between stimuli in the discrimination task than in the identification task. Thus, in roughness perception humans spontaneously use different strategies that seem effective for the perceptual task and the stimuli. A control task, in which the participants just explore the stimuli without any perceptual objective, shows that humans use a smaller contact force and a lower scanning velocity for the rough stimuli than for the smooth stimuli. Possibly, these strategies are related to aversiveness while exploring stimuli

Health characteristics and consultation patterns of people with intellectual disability: a cross-sectional database study in English general practice.

BACKGROUND: People with intellectual disability (ID) are a group with high levels of healthcare needs; however, comprehensive information on these needs and service use is very limited. AIM: To describe chronic disease, comorbidity, disability, and general practice use among people with ID compared with the general population. DESIGN AND SETTING: This study is a cross-sectional analysis of a primary care database including 408 English general practices in 2012. METHOD: A total of 14 751 adults with ID, aged 18-84 years, were compared with 86 221 age-, sex- and practice-matched controls. Depending on the outcome, prevalence (PR), risk (RR), or odds (OR) ratios comparing patients with ID with matched controls are shown. RESULTS: Patients with ID had a markedly higher prevalence of recorded epilepsy (18.5%, PR 25.33, 95% confidence interval [CI] = 23.29 to 27.57), severe mental illness (8.6%, PR 9.10, 95% CI = 8.34 to 9.92), and dementia (1.1%, PR 7.52, 95% CI = 5.95 to 9.49), as well as moderately increased rates of hypothyroidism and heart failure (PR>2.0). However, recorded prevalence of ischaemic heart disease and cancer was approximately 30% lower than the general population. The average annual number of primary care consultations was 6.29 for patients with ID, compared with 3.89 for matched controls. Patients with ID were less likely to have longer doctor consultations (OR 0.73, 95% CI = 0.69 to 0.77), and had lower continuity of care with the same doctor (OR 0.77, 95% CI = 0.73 to 0.82). CONCLUSION: Compared with the general population, people with ID have generally higher overall levels of chronic disease and greater primary care use. Ensuring access to high-quality chronic disease management, especially for epilepsy and mental illness, will help address these greater healthcare needs. Continuity of care and longer appointment times are important potential improvements in primary care

Mortality Among Adults With Intellectual Disability in England: Comparisons With the General Population.

OBJECTIVES: To describe mortality among adults with intellectual disability in England in comparison with the general population. METHODS: We conducted a cohort study from 2009 to 2013 using data from 343 general practices. Adults with intellectual disability (n = 16 666; 656 deaths) were compared with age-, gender-, and practice-matched controls (n = 113 562; 1358 deaths). RESULTS: Adults with intellectual disability had higher mortality rates than controls (hazard ratio [HR] = 3.6; 95% confidence interval [CI] = 3.3, 3.9). This risk remained high after adjustment for comorbidity, smoking, and deprivation (HR = 3.1; 95% CI = 2.7, 3.4); it was even higher among adults with intellectual disability and Down syndrome or epilepsy. A total of 37.0% of all deaths among adults with intellectual disability were classified as being amenable to health care intervention, compared with 22.5% in the general population (HR = 5.9; 95% CI = 5.1, 6.8). CONCLUSIONS: Mortality among adults with intellectual disability is markedly elevated in comparison with the general population, with more than a third of deaths potentially amenable to health care interventions. This mortality disparity suggests the need to improve access to, and quality of, health care among people with intellectual disability. (Am J Public Health. Published online ahead of print June 16, 2016: e1-e8. doi:10.2105/AJPH.2016.303240)

First-principles extrapolation method for accurate CO adsorption energies on metal surfaces

We show that a simple first-principles correction based on the difference between the singlet-triplet CO excitation energy values obtained by DFT and high-level quantum chemistry methods yields accurate CO adsorption properties on a variety of metal surfaces. We demonstrate a linear relationship between the CO adsorption energy and the CO singlet-triplet splitting, similar to the linear dependence of CO adsorption energy on the energy of the CO 2$\pi$* orbital found recently {[Kresse {\em et al.}, Physical Review B {\bf 68}, 073401 (2003)]}. Converged DFT calculations underestimate the CO singlet-triplet excitation energy $\Delta E_{\rm S-T}$, whereas coupled-cluster and CI calculations reproduce the experimental $\Delta E_{\rm S-T}$. The dependence of $E_{\rm chem}$ on $\Delta E_{\rm S-T}$ is used to extrapolate $E_{\rm chem}$ for the top, bridge and hollow sites for the (100) and (111) surfaces of Pt, Rh, Pd and Cu to the values that correspond to the coupled-cluster and CI $\Delta E_{\rm S-T}$ value. The correction reproduces experimental adsorption site preference for all cases and obtains $E_{\rm chem}$ in excellent agreement with experimental results.Comment: Table sent as table1.eps. 3 figure

Returning to work after long term sickness absence due to low back pain – the struggle within: a qualitative study of the patient's experience.

Background: low back pain (LBP) is a major cause of work absence. Assisting individuals back into work is an important part of rehabilitation. Objective: to explore the experiences of individuals returning to work after an episode of sickness absence due to LBP. Participants: Five women employed by a UK University who had returned to work. Method: in this qualitative study, participants underwent semi-structured interviews about their experiences. The transcripts were analysed using interpretative phenomenological analysis. Results: two primary themes emerged 1) perceived pressure to return to work and 2) strategies employed to relieve the pressure to return. Pressure to return to work arose from a number of sources including guilt and a personal work ethic, internally, and from colleagues and management, externally. This pressure led to the individual employing a number of strategies to reduce it. These ranged from a simple denial of health concerns and decision to return to work regardless of their condition, to placing the responsibility of the decision not to return to work onto a significant other, such as a family member or health care professional. Cconclusions: individuals returning to work with LBP experience considerable pressure to return and use a range of strategies to mediate that pressure

Do Empowered Front-Line Employees Perform Better? A Non-linear Approach and the Role of Service Complexity

This study re-examines the influence of front-line service employee empowerment on their performance, following a non-linear approach and integrating the role of service complexity. For that purpose, data were collected through a quantitative survey on 240 front-line employees in two major UK cities (London, Leeds). The study’s results indicate that empowerment has a significant impact on their performance and that this impact is non-linear (quadratic). Specifically, the relationship between empowerment and performance is negative for low-level empowerment and positive for high-level empowerment. In addition, the study’s results show that the nature of this relationship is different for different levels of service complexity. Specifically, for low-complexity services, the relationship between empowerment and performance was found quadratic, whereas for high-complexity services the relationship was found positive and linear. Based on the study’s main conclusions important implications for both academics and practitioners are presented