This paper presents the design and implementation of a novel single-fed microstrip hexagonal patch antenna, which operates on 2.4 GHz by employing three-dimensional (3D) printing technologies for circular polarization (CP) with wide 3 dB beamwidth. It was fabricated using a thermoplastic polymer-based material through a 3D printer and subsequently coated with copper. The design of the antenna consists of identical hexagonal slots in mesh grid fashion. These slots are filled with air and perturbations are introduced, by partially filling them with rectangular chunks of the polymer. This produces asymmetry in the substrate layer which leads to the splitting of the degenerate modes of the patch antenna, thus producing CP waves. The presence of volume fraction of air influences the effective permittivity and as a result the axial ratio beamwidth enhances to 176∘. The substrate was created as a double layer, lightweight unit using fused deposition modeling. A copper layer was then added to the underside of the lower substrate to serve as ground. The 3D gain of the antenna is found to be 7.01 dB. The proposed low-profile antenna has the potential to be incorporated in IoT and smart devices, intelligent transport systems, and GPS tracking.

In 1905, the Afro-British composer Samuel Coleridge-Taylor published his Twenty-Four Negro Melodies, a set of character pieces that includes arrangements of sixteen African American spirituals for piano solo. Despite this music's lasting popularity, scholars have done little to contextualize Coleridge-Taylor's statement that he wished to create a Black parallel to Brahms's Hungarian Dances or Dvořák's Slavonic Dances; most see the pieces as reflecting the influence of Dvořák. Yet these character pieces diverge from both Dvořák's and Brahms's precedent by including source citations with both melodies and lyrics. Coleridge-Taylor's compositional approach and his use of citations is much closer to Grieg and Stanford—two other role models whom scholars have regularly overlooked. The citations also rebalance the interpretative framework of the character piece as a genre, and, like W. E. B. Du Bois's use of spirituals in The Souls of Black Folk, can support several explanations. On one hand, they provide hidden texts for these instrumental pieces and provide a first line of defense against intentional (and bigoted) misunderstandings of the music. On the other hand, they also act as reference points for readers who want to learn more about the African American spiritual. Coleridge-Taylor's concern with cultural authenticity undoubtedly resulted from his close interactions with American spiritual singers, such as Frederick J. Loudin and Harry T. Burleigh. In this sense, the Negro Melodies served as Coleridge-Taylor's intervention in ongoing debates among Black Americans about the value and legacy of the spiritual.

This article presents a brief historiographical survey of scholarship on the history of science and history of knowledge in Byzantium since the 1920s and proposes several directions for future research. These include the study of instruments; of the language that Byzantine scientific texts, diagrams, and even instruments employ; the study of the involvement of women and of the knowledge created, transferred, and owned by non-elites. Ultimately, the article argues, a critical historiographical approach enables an understanding of the field of Byzantine studies as an element of the global and multidisciplinary systems of historical knowledge, including the history of science and the history of knowledge.

The Cunene region of southern Angola, especially the area around Xangongo, hosts a large number of African baobabs, including several superlative specimens. Our research reports the investigation of the three biggest specimens from Xangongo Grove, named XG-1 (11 stems; circumference 26.34 m), XG-2 (5 stems; 22.70 m) and XG-3 (9 stems; 27.73 m), and of the largest baobab from Xangongo town, named XT-1 (7 stems; 21.02 m). Several wood samples were collected from these four baobabs mainly as cores from trunks and/or primary branches and then radiocarbon-dated by AMS. The two oldest samples were extracted from two primary branches of baobab XG-1. These have practically identical radiocarbon dates of 1822 ± 19 BP and 1822 ± 10 BP, which correspond to identical calibrated ages of 1785 ± 15 and 1785 ± 10 calendar years. The calculated age of baobab XG-1 is 2100 ± 50 years. Thus, XG-1, which is called by the locals “The biggest baobab of Africa”, becomes the oldest living African baobab with accurate dating results. The results indicate ages of 1100 years for baobab XG-2, 850 years for baobab XG-3 and 550 years for baobab XT-1.

This paper explores the Onassis Foundation's transformative impact on C.P. Cavafy's legacy by bridging traditional literary heritage with contemporary digital culture. Through strategic digitization, global events, and social media campaigns, the Foundation has expanded Cavafy's reach, reframing him as both a cultural asset and a networked figure for contemporary audiences. This study examines how an institutional approach shapes perceptions of Cavafy's work, balancing authenticity with celebrity-making, and considers the implications for Modern Greek literature's visibility on the global stage.

We report a set of radiocarbon dating of prehistoric settlements located on the paleolake Baruun Khuree shores in the Gobi-Altai area, southern Mongolia. The obtained series of 11 AMS 14C measurements on charcoal and other charred plant macro-remains can be associated with one of the earliest episodes of the Holocene highly mobile desert-adapted hunter-gatherers activities from the Gobi desert (ca. 11,250–10,500 cal BP). Exploiting a wide range of environments, including dune fields, they are characterized by pottery usage and microblade core technology with wedge-shaped cores as well as osteological materials. These preliminary results are part of a project analyzing the nature of long-lasting prehistoric occupation around Tsakhiurtyn Hundi (Eng. Flint Valley)—one of the most extensive early prehistoric sites of Central Asia owing its name to the presence of abundant flint outcrops, lithic workshops and their innumerable flint artifacts.

For two decades, real wage comparisons have been centre stage in global socio-economic history studies of comparative development, offering a tractable – if oversimplified – gauge of living standards. But critics argue that these studies have leaned too heavily on the earnings of male, urban, unskilled, daily wage labourers, overlooking wage disparities between social groups and the mechanics of how wages were paid. This Special Issue attempts to shift the focus to overlooked groups and “wage systems” – the methods behind pay determination – and their role in deepening or mitigating inequality. This introduction attempts a global overview of the long-term developments in real wage studies, highlighting methodological innovations and challenges over recent decades. It also explains how the various articles in this Special Issue, spanning topics from medieval Europe to colonial India, contribute to this field. We argue that wage systems – and the inequalities they breed – played out in ways as varied as history itself, so comparing material living standards across time and space remains a complex calculation. We plead for a two-pronged approach: the continued study of all types of income of all working people, alongside a new focus on the social norms, institutions, and systems that determine the opportunities for individuals to acquire an income. A consolidated bibliography of all references in this Special Issue may help future research.

We study $\ell $-isogeny graphs of ordinary elliptic curves defined over $\mathbb {F}_q$ with an added level structure. Given an integer N coprime to p and $\ell ,$ we look at the graphs obtained by adding $\Gamma _0(N)$, $\Gamma _1(N),$ and $\Gamma (N)$-level structures to volcanoes. Given an order $\mathcal {O}$ in an imaginary quadratic field $K,$ we look at the action of generalized ideal class groups of $\mathcal {O}$ on the set of elliptic curves whose endomorphism rings are $\mathcal {O}$ along with a given level structure. We show how the structure of the craters of these graphs is determined by the choice of parameters.

This paper seeks to synthesize fifty years of academic historical publishing since 1974. It argues that the advent of democracy in Greece anticipated three waves of historiographic production: one immediately following the Junta's collapse in 1974 up to the 1990s; a second from the late 1990s to the 2010s; and one since then until the present.

This article revisits Odysseus Elytis’ poem Alvaniada, first presented on the Greek National Radio Foundation (EIR) in 1956. I approach the Alvaniada as a radio poem, highlighting its role in the development of Elytis’ intermedial poetics, which aims at inventing, in his own words, ‘new fixed forms that facilitate the poem's transition from the domain of the book to the domain of the theatre or to music and song’. The case of the Alvaniada directs attention to the 1950s as a critical, yet understudied, decade for Elytis’ acquisition of canonical status: it was then that his works became widely disseminated via national cultural institutions such as the state theatre and radio.

In this paper, I identify a distinctive type of epistemic injustice which I call “identification-based injustice.” In paradigm cases, a prejudiced interlocutor responds to a trans speaker’s gender self-identification (e.g., “I am a woman”) with disbelief or dismissal. This is an everyday form of injustice experienced by trans individuals, and frequently has severe practical consequences. It involves testimony with a particular kind of content, namely self-identification. I argue that because the relevant self-IDs express substantial self-knowledge, the injustice harms the speaker both in their capacity as a knower and in their capacity to be known, by themself and by others. This illuminates a distinctively epistemic obligation on the part of hearers to take trans speakers’ self-identifications seriously.

Infinitival constructions (ICs) have received considerable attention from syntacticians and typologists, but less so from variationist linguistics. Based on new data from a comprehensive dialect survey, this study investigates the variation and change of ICs in Austrian dialects. The results reveal clear geographical patterns for different IC variants in Austria. Regarding linguistic factors, several constraints are identified, most importantly with respect to the IC’s syntactical function and governing element (e.g., phase verbs). Moreover, an apparent-time analysis shows that one variant (zum + infinitive) has been grammaticalized and spread at the expense of all other variants, presumably due to both dialect leveling and dialect-standard advergence.