On the χ 2 Test of Goodness of Fit

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LXIX. On a general theory of the method of false position

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A Second Study of the Statistics of Pulmonary Tuberculosis: Marital Infection.

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Disordering to Order: de Vries behavior from a Landau theory for smectics

We show that Landau theory for the isotropic, nematic, smectic A, and smectic C phases generically, but not ubiquitously, implies de Vries behavior. I.e., a continuous AC transition can occur with little layer contraction; the birefringence decreases as temperature T is lowered above this transition, and increases again below the transition. This de Vries behavior occurs in models with unusually small orientational order, and is preceded by a first order I − A transition. A first order AC transition with elements of de Vries behavior can also occur. These results correspond well with experimental work to date.Comment: 4 pages, 2 page appendi

Reasonable adjustment, unfair advantage or optional extra? Teaching staff attitudes towards reasonable adjustments for students with disabilities

This article explores staff awareness and confidence in implementing reasonable adjustments for students with disabilities in higher education (HE) contexts from a variety of faculty staff at one institution. The duty for UK HE providers to make reasonable adjustments was included in the Disability Discrimination Act (DDA) 1995 and later transposed into the Equality Act in 2010. This project aimed to explore current levels of teaching staff awareness concerning implementing reasonable adjustments for students with disabilities. Alongside this, the project also sought to better understand the attitudes towards reasonable adjustments that teaching staff currently hold. A small-scale survey-based study was conducted between July 2020 and October 2020, gaining qualitative and quantitative data from 38 staff members across one HE provider. The data reveals staff committed to assisting students to access education. However, as with other literature, our findings demonstrate that there are high levels of anxiety around reasonable adjustments and a desire for further training and support. Significantly, the data also indicated a lack of understanding of the requirement to make reasonable adjustments as a legal obligation and duty as a means of combatting discrimination and exclusion

Nineteenth-Century Popular Science Magazines, Narrative, and the Problem of Historical Materiality

In his Some Reminiscences of a Lecturer, Andrew Wilson emphasizes the importance of narrative to popular science lecturing. Although Wilson promotes the teaching of science as useful knowledge in its own right, he also recognizes that the way science is taught can encourage audiences to take the subject up and read further on their own. Form, according to Wilson, should not be divorced from scientific content and lecturers should ensure that not only is their science accurate, but that it is presented in a way that will provoke curiosity and stimulate interest. This paper discusses the influence of narrative in structuring scientific objects and phenomena, and considers the consequences of such presentations for historical research. As scientific journalism necessarily weaves both its intended audience and the objects under discussion into its accounts, these texts demand that we recognize their nature as social relationships inscribed in historical objects

Contingency Plans for Air Traffic Management

We present two heuristics based on constraint technology that solve the problem of generating air traffic management contingency plans, which are used in the case of a catastrophic infrastructure failure within EUROCONTROL, the European Organisation for the Safety of Air Navigation. Of the heuristics presented, one is based on constraint-based local search and tabu search, and the other one is a constraint programming and large neighbourhood search hybrid algorithm. The heuristics show that it is feasible to automate the development of contingency plans, which is currently done by human experts; this is desirable for several reasons, for example it would allow the contingency plans to be generated with an increased frequency. The generated plans were evaluated, by EUROCONTROL, to be at least as good as the human-made ones. Document type: Part of book or chapter of boo

Superconducting Gatemon Qubit based on a Proximitized Two-Dimensional Electron Gas

The coherent tunnelling of Cooper pairs across Josephson junctions (JJs) generates a nonlinear inductance that is used extensively in quantum information processors based on superconducting circuits, from setting qubit transition frequencies and interqubit coupling strengths, to the gain of parametric amplifiers for quantum-limited readout. The inductance is either set by tailoring the metal-oxide dimensions of single JJs, or magnetically tuned by parallelizing multiple JJs in superconducting quantum interference devices (SQUIDs) with local current-biased flux lines. JJs based on superconductor-semiconductor hybrids represent a tantalizing all-electric alternative. The gatemon is a recently developed transmon variant which employs locally gated nanowire (NW) superconductor-semiconductor JJs for qubit control. Here, we go beyond proof-of-concept and demonstrate that semiconducting channels etched from a wafer-scale two-dimensional electron gas (2DEG) are a suitable platform for building a scalable gatemon-based quantum computer. We show 2DEG gatemons meet the requirements by performing voltage-controlled single qubit rotations and two-qubit swap operations. We measure qubit coherence times up to ~2 us, limited by dielectric loss in the 2DEG host substrate