Weight and power savings shaft encoder interfacing techniques for aerospace applications

Many aerospace applications for shaft angle digitizers such as optical shaft encoders require special features that are not usually required on commercial products. Among the most important user considerations are the lowest possible weight and power consumption. A variety of mechanical and electrical interface techniques that have large potential weight and power savings are described. The principles to be presented apply to a wide variety of encoders, ranging from 16 to 22 bit resolution and with diameters from 152 to 380 mm (6 to 15 in.)

Human well-being and causality in social epidemiology

This paper discusses the work of Ballas and Dorling on life events and happiness. I believe epidemiologists have things they could learn from economists (and vice versa). Here I emphasize the issue of how to establish causality, and try to suggest some ways forward

Whither PQL?

Generalized linear mixed models (GLMM) are generalized linear models with normally distributed random effects in the linear predictor. Penalized quasi-likelihood (PQL), an approximate method of inference in GLMMs, involves repeated fitting of linear mixed models with “working” dependent variables and iterative weights that depend on parameter estimates from the previous cycle of iteration. The generality of PQL, and its implementation in commercially available software, has encouraged the application of GLMMs in many scientific fields. Caution is needed, however, since PQL may sometimes yield badly biased estimates of variance components, especially with binary outcomes. Recent developments in numerical integration, including adaptive Gaussian quadrature, higher order Laplace expansions, stochastic integration and Markov chain Monte Carlo (MCMC) algorithms, provide attractive alternatives to PQL for approximate likelihood inference in GLMMs. Analyses of some well known datasets, and simulations based on these analyses, suggest that PQL still performs remarkably well in comparison with more elaborate procedures in many practical situations. Adaptive Gaussian quadrature is a viable alternative for nested designs where the numerical integration is limited to a small number of dimensions. Higher order Laplace approximations hold the promise of accurate inference more generally. MCMC is likely the method of choice for the most complex problems that involve high dimensional integrals

Q and A with Dr Jacob Breslow on Ambivalent childhoods: speculative futures and the psychic life of the child

We speak to Dr Jacob Breslow about his new book Ambivalent Childhoods: Speculative Futures and the Psychic Life of the Child, an interdisciplinary study which explores how childhood is mobilised within and against contemporary US social justice movements, including Black Lives Matter, transfeminism, queer youth activism and antideportation movements

They would have transitioned me: third conditional ‘TERF’ grammar of trans childhood

Some of the most virulent public trans-exclusionary radical feminist (TERF) discourse in the UK follows the grammatical form of the third conditional: if I had grown up now, I would have been persuaded to transition. This articulation of the hypothetical threat of a transition that did not happen but is imagined, in retrospect, to be not just possible but forcibly enacted plays an important role, both politically and psychically, in a contemporary political landscape that is threatening the livelihoods of trans children. Interrogating this discourse via an analysis of an open letter by J.K. Rowling, and a documentary by Stella O’Malley, this article asks: what might we learn about contemporary transphobia in the UK if we took seriously the grammar of TERF discourse animated by trans childhood? It argues that while the third conditional grammar of TERF discourse could articulate a politics of solidarity between cis and trans positionalities and politics, its potential for a shared political standpoint is routinely interrupted by the defence mechanisms that are oriented by the psychic life of the child. Interrogating these defence mechanisms at the level of the cultural, the article traces out paranoia (as reading practice and psychic state) as well as projection, as two main modes of TERF engagement with trans childhood. The article thus engages with the range of real and fantasmatic impossibilities that haunt the trans child both in the present and the past, and it contributes to the growing body of scholarship on trans childhoods. In doing so, it makes the case that public discourse on trans children should desist from hypothetical third conditional claims, and instead find ways of embracing trans childhoods unconditionally