Human sensitivity to gearshift loads

This paper describes an investigation of the ability of humans to distinguish different levels of gearlever load. A test rig with a forward-backward moving gearshift lever was constructed using the typical interior dimensions of European B segment automobiles. The rig used a system of weights and pulleys to provide a load which could be varied in steps of 1%. Four reference loads were chosen which were considered representative of automotive gearshift operation: 0.5, 1.0, 2.0 and 5.0 kg. Twenty subjects took part in the study. Using a variation on the psychophysical method of limits, the subjects were asked to respond whether a test load was heavier or lighter than a reference load. The Weber Fraction was found to decrease monotonically from a value of 0.036 for the 0.5 kg reference load to a value of 0.029 at the 5.0 kg reference load. The average value across all reference loads was 0.032. Measurements of the gearshift force made by means of a knob containing a load cell suggested that the variation in the measured Weber Fraction might be attributable to the time behaviour of the force exchanged between the human subject and the control surface

Personal Protective Equipment (PPE) waste valorisation via pyrolysis: Face masks and nitrile gloves products, characterisation and challenges

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Gender role, life satisfaction, and wellness: Androgyny in a Southwestern Ontario sample.

This study investigated the relationships among gender role and self-reported health functioning in a sample of community dwelling older adults. One hundred and two (55 female, 47 male) participants were recruited through seniors’ associations in Windsor, Ontario. Analyses of variance were conducted separately by gender to compare the self-rated physical health functioning, wellness, and life satisfaction of participants differing on classification of their gender role. For older women classified as androgynous, gender role exhibited significant effects on general wellness and life satisfaction, but not on self-reported physical health functioning. In support of Bem’s androgyny model of optimal adjustment, post-hoc analyses revealed that women who rated themselves as androgynous reported better overall wellness levels than their peers. Older men’s self-reported physical health functioning and general wellness did not differ significantly by gender role. Limitations and implications are discussed

An improved process for the fabrication and surface treatment of custom-made titanium cranioplasty implants informed by surface analysis

Cranioplasty implants are routinely fabricated from commercially pure titanium plates by maxillofacial prosthetists. The differing fabrication protocols adopted by prosthetists working at different hospital sites gives rise to considerable variations in surface topography and composition of cranioplasty implants, with residues from the fabrication processes having been found to become incorporated into the surface of the implant. There is a growing recognition among maxillofacial prosthetists of the need to standardise these protocols to ensure quality and consistency of practice within the profession. In an effort to identify and eliminate the source of the inclusions associated with one such fabrication protocol, the present study examined the surfaces of samples subjected to each of the manufacturing steps involved. Surface and elemental analysis techniques identified the main constituent of the surface inclusions to be silicon from the glass beads used to texture the surface of the implant during fabrication. Subsequent analysis of samples prepared according to a revised protocol resulted in a more homogeneous titanium dioxide surface as evidenced by the reduction in area occupied by surface inclusions (from 8.51% ± 2.60% to 0.93% ± 0.62%). These findings may inform the development of improved protocols for the fabrication of titanium cranioplasty plates

Genomic evidence of paternal genome elimination in the globular springtail Allacma fusca

Paternal genome elimination-a type of reproduction in which males inherit but fail to pass on their father's genome-evolved independently in 6-8 arthropod clades. Thousands of species, including several important for agriculture, reproduce via this mode of reproduction. While paternal genome elimination is well established in some of the clades, the evidence in globular springtails (Symphypleona) remains elusive, even though they represent the oldest and most species-rich clade putatively reproducing via paternal genome elimination. We sequenced genomic DNA from whole bodies of Allacma fusca males with high fractions (>27.5%) of sperm to conclusively confirm that all the sperm carry 1 parental haplotype only. Although it is suggestive that the single haplotype present in sperm is maternally inherited, definitive genetic proof of the parent of origin is still needed. The genomic approach we developed allows for the detection of genotypic differences between germline and soma in all species with sufficiently high fraction of germline in their bodies. This opens new opportunities for scans of reproductive modes in small organisms

Shaping the techno-social landscape of corrections: How values, technology, and culture influence the design of correctional service delivery applications

Over the past decade, a variety of digital platforms have emerged to deliver core correctional services. Understanding the challenges and drivers of correctional agencies’ digitalisation helps us to understand the processes that shape these technologies and their impact on correctional environments and practices. To bridge this gap, we conducted interviews with 26 software developers and other stakeholders involved in the digitalisation of corrections, aiming to explore the challenges encountered in designing and implementing digital service delivery technologies for correctional services. Our findings shed light on some key challenges faced by software developers and other stakeholders involved in the design process, including institutional culture, justice system bureaucracy, and public perceptions. These challenges significantly influence design processes and the availability of digital products for end users. They shape the techno-social landscape of correctional agencies and contribute to the dominance or absence of certain digital platforms or artefacts