This paper investigates the performance of 3D-printed dielectric reflectarray antennas (RAs) with wideband behavior and beam-steering capabilities. The designed unit cell consists of a single-layer dielectric element perforated with a square hole, whose side is used to control the local variation of the reflection coefficient. The numerical analysis of the unit cell and of first $52\times52$ reflectarray working in Ka-band, whose scanning capabilities are tested just moving the feed along an arc, confirms that the unit cell has a stable behavior with respect to both the frequency and the direction of arrival of the incident field. In view of these promising capabilities, the proposed unit cell is used to design a bifocal reflectarray with the same size and working in the same frequency band of the first one. Its numerical characterization and the measurements of a prototype prove that the RA is able to provide less than 0.8 dB of gain losses over a scanning range of ±40∘ in the vertical plane, while the bandwidth varies between 13.5% and 28%, depending on the pointing direction. The obtained results demonstrate the effectiveness of the proposed approach and highlight the potential of 3D-printing technology for producing high performance, cost-effective RAs with wideband behavior and excellent beam-steering features.

Consider a Brownian motion on the circumference of the unit circle, which jumps to the opposite point of the circumference at incident times of an independent Poisson process of rate $\lambda$. We examine the problem of coupling two copies of this ‘jumpy Brownian motion’ started from different locations, so as to optimise certain functions of the coupling time. We describe two intuitive co-adapted couplings (‘Mirror’ and ‘Synchronous’) which differ only when the two processes are directly opposite one another, and show that the question of which strategy is best depends upon the jump rate $\lambda$ in a non-trivial way. We also provide an explicit description of a (non-co-adapted) maximal coupling for any jump rate in the case that the two jumpy Brownian motions begin at antipodal points of the circle.

During a survey of soil nematodes in Iran, a population of a species belonging to the order Mononchida was recovered. The new species, Paramylonchulus iranicus sp. n. is characterized by body length (1292–1535 μm in females and 1476–1670 μm in males), c (20.2–29.0 in females and 19.9–27.4 in males), buccal cavity length (23.0–26.0 μm), post vulval uterine sac length (135–162 μm), spicule length (46.0–50.0 μm), gubernaculum length (8.0–11.0 μm), and tail length (49.0–70.0 μm in females and 55.0–73.0 μm in males). Canonical discriminant analysis clearly separated P. iranicus sp. n. from the closely related species Paramylonchulus based on the important morphometric characters of females and males. A molecular study of the 18S rDNA region of P. iranicus sp. n. places this population in a well-supported clade with other species of the genus.

A 13.0 cal ka BP pollen record from Twin Ponds, Vermont, provides new insights into the climate history of the northeastern United States. Modern analogs were used to produce qualitative and quantitative climate reconstructions for Twin Ponds. The Twin Ponds record was compared with nearby Knob Hill Pond to develop a Vermont reconstruction that was compared with reconstructions from two sites at a similar latitude. Postglacial warming at 11.5 cal ka BP followed a cool, wet Younger Dryas and was the largest temperature change of the record. The warmest, driest conditions occurred at ca. 9.0 cal ka BP, followed by an increase in moisture. Latitudinal and elevational shifts in the location of modern analogs from 5.7 to 4.0 cal ka BP were used to infer cooling and increased moisture during the Tsuga canadensis decline. Analysis of the timing of pollen events between the two Vermont sites suggests a more rapid decline in T. canadensis at the more northern Knob Hill Pond and further supports the possibility that colder temperatures contributed to this event. The other northern sites show similar trends until 2.5 cal ka BP, when precipitation in the easternmost site diverges, indicating the establishment of modern climatic gradients.

The paper reports the findings of over a decade of pioneering, award-winning fieldwork which has explored how workplace experience, if embedded successfully in different stages of legal education, can accelerate the ‘speed to capability’ and skills development of early career lawyers. The benefits from initial experiments of graduate-level work placements carried out by the authors since 2008 are presented. The paper then explores the findings from almost 10 years of creating year-long work placements for law undergraduates, assessing student skill growth, and the impact of the work placements on degree results and employment outcomes, before and during the Covid-19 pandemic.

Prior to the acts of demolition pursued in the ventennio to recover and celebrate the heirlooms of antiquity as the simulacra of a fascist restoration of the Roman Empire, a Gothic Revival villa stood atop the Palatine Hill. A transhistorical palimpsest, this edifice incorporated a portion of the imperial palace that was erected for Domitian after his accession to power (AD 81). Through the disclosure of groundbreaking archival documentation, this article reveals that the Gothic Revival mansion, commonly known as ‘Villa Mills’, can be renamed ‘Villa Smith’. It was Robert Smith (1787–1873), a lieutenant-colonel of the East India Company, who embarked on the medievalist makeover rather than the previous owner, a fellow Englishman named Charles Andrew Mills (1770–1846). In spite of an exceptional location in the imperial heart of the Eternal City, knowledge of the nineteenth-century history of the site is very limited and tends to be derived from hearsay and hypothesis, rather than primary information. Drawing on broad textual and iconographical sources, this article aims to fill this gap by reflecting closely upon the relationships in pre-unification Rome between architecture and political and cultural intent, between Italy and Britain, and between modernity and antiquity. After a reconstruction of British presence above the Domus Augustana and an investigation of the person behind the neo-Gothic reworking, the study offers a critical reconsideration of Villa Mills and the character of (Charles Andrew) Mills.

This article examines the enforcement of anti-miscegenation law in Progressive Era Mississippi by focusing on a series of unlawful cohabitation prosecutions of interracial couples in Natchez. It situates efforts to police and punish mixed-race families within the broader legal culture of Jim Crow, as politicians, judges, and district attorneys sought stricter enforcement of morals laws, including those barring interracial cohabitation. This article argues that the historic prerogative of white men to choose their sexual and domestic partners undermined the illegality of interracial marriage. Lynching deterred Black men from cohabiting with white women, but prosecutions for “unlawful cohabitation” did not effectively punish white men and Black women who formed lasting partnerships. This article relies on extensive research in local court records that reveal that prosecutions of white men and Black women often resulted in fines and, in many cases, had little effect on these mixed-race families. In Natchez and elsewhere, eugenic ideologies of “white racial purity” were no match for a patriarchal legal culture that gave white men leeway to ignore the law when it suited them, even amid outward denunciations of miscegenation. In Mississippi, many white men did not view relationships between white men and Black women as a clear threat to white supremacy, creating space for some interracial families to survive into the twentieth century.

This article evaluates statutory provisions and case law regarding a mortgagee's rights to exercise its statutory power of sale over the matrimonial home in Nigeria. It reveals that no statute protects the rights of family members, particularly wives and children, in the mortgaged home. The mortgagee must grapple with the reality of ownership, as wives often resort to litigation to set aside sales, on the ground that they are joint owners with their husbands. Ironically, some Supreme Court decisions, while protecting the interests of other family members (contrary to the established principles of property law), have tended to ignore the mortgagee's power of sale over the mortgaged matrimonial home, thus making it unattractive to lending institutions as collateral. This article recommends that all parties’ interests should be set out in a legal framework, as in England, where a non-owning spouse's right of occupation must be registered with the land registry.

A new occurrence of austinite, CaZnAsO4(OH), conichalcite, CaCuAsO4(OH), and zincolivenite, CuZnAsO4(OH), is described from the Tripi mine, Peloritani Mountains, Sicily, Italy. These species have been observed in euhedral crystals in vugs of a calcite vein and were characterised using single-crystal X-ray diffraction, electron microprobe analysis and micro-Raman spectroscopy. Austinite and conichalcite have isotypic relations, both crystallising in space group P212121. Unit-cell parameters of austinite are a = 7.4931(5), b = 9.0256(6), c = 5.9155(4) Å, V = 400.06(5) Å3; its crystal structure was refined on the basis of 1210 unique reflections with Fo > 4σ(Fo) and 77 least-square parameters to R1 = 0.0236. Conichalcite has unit-cell parameters a = 7.419(10), b = 9.111(11), c = 5.867(7) Å and V = 396.6(1.4) Å3; the diffraction quality of its available grains was not good enough to allow a high-quality structural refinement. Chemical formulae of austinite and conichalcite are Ca1.04(1)Zn0.86(4)Cu0.09(4)As0.98(2)P0.02(1)O4(OH)0.98 and Ca0.98(1)Fe2+0.02(4)Cu0.69(10)Zn0.30(6)As0.97(2)P0.03(1)O4(OH)0.98, respectively. The new chemical data on the austinite–conichalcite isotypic pair, coupled with previous analyses, supports a possible miscibility gap between the compositions (Zn0.25Cu0.75) and (Zn0.50Cu0.50). Zincolivenite has unit-cell parameters a = 8.4594(9), b = 8.5324(8), c = 5.9893(6) Å, V = 432.30(12) Å3 and space group Pnnm; its crystal structure was refined to R1 = 0.0230 for 523 unique reflections with Fo > 4σ(Fo) and 47 least-square parameters. Its chemical composition is Cu0.73(5)Zn1.25(5)As1.01(1)O4(OH)1.01. The refinement of the crystal structure supports the ordering of Cu and Zn in two different crystallographic sites. Micro-Raman spectra of austinite, conichalcite and zincolivenite are discussed, with a focus on the O–H stretching region where local Zn and Cu arrangements affect the position of Raman bands in zincolivenite. These arsenates probably play an environmental role in the Peloritani area, where the occurrence of high contents of some potentially toxic elements in soils and stream sediments has been reported.

Effective hospital environmental cleaning requires proper technique and training. Highlight is a novel additive that colorizes bleach wipes to help visualize wiped surfaces and fades to colorless to confirm effective cleaning. In a 401-bed hospital study, Highlight reduced fluorescent marker removal failure rates from a baseline of 12.4% to 0.6%.

This essay adapts Dietrich Bonhoeffer's ‘orders of preservation’ to address the sharp rise in species extinctions due to human causes. I argue that Bonhoeffer's creative use of preservation orders to build an international alliance provides the scope required to meet the present biodiversity crisis while pre-empting Karl Barth's criticism of static regionalism and avoiding problematic elements in Carl Schmitt's concept of the ‘restraining force’. Drawing on Bonhoeffer's 1932 address, ‘On the Theological Foundation of the Work of the World Alliance’, I present three convictions to guide the task of preservation today, which include the formation of alliances between ecclesial and scientific communities in order to properly specify God's commandment.

Measurement invariance (MI) is essential to bolstering validity arguments behind psychometric instruments (Zumbo, 2007). Nonetheless, very few second language (L2) anxiety scales, including the most widely used L2 anxiety questionnaire—the Foreign Language Classroom Anxiety Scale (FLCAS; Horwitz et al., 1986)—have been tested for MI. The present paper seeks to address this deficiency in the literature (a) by demonstrating why this procedure is key to enhancing our understanding of the latent phenomenon in question, particularly in relation to different language learning contexts, (b) by outlining the main stages of MI testing with specific recommendations for L2 scale developers and users, (c) by providing commendable examples of the application of MI in applied linguistics research in order to illustrate the potential of this technique, and (d) by making a case for employing MI in future validation studies, thereby promoting methodologically sound research practices in the context of anxiety scales and elsewhere in applied linguistics.