Search Results (4,615)

This study proposes a combination of optical and thermal methods to investigate the structural integrity of two 16th–17th centuries wooden panel paintings at the early stages of restoration. Well-established techniques, such as 3D scanning, technical photography, and active thermography, are combined with the less conventional shearography, which has recently gained increasing relevance in the diagnostics of cultural heritage materials. The proposed methodology enables the identification and spatial localization of different forms of degradation within the multilayered structure of the artworks, including physical-structural alterations, insect damage, localized hygroscopic degradation, nails, interlayer deterioration, and craquelure. This approach provides a comprehensive insight into the state of the panel painting structure and highlights potentially critical areas which were undetectable by visual inspection alone, demonstrating the ability to guide restoration interventions. Full article

The Tabanidae fauna of Uruguay has historically received limited attention, with most records dating from the 19th and early 20th centuries and concentrated near Montevideo. Here, we provide an updated synthesis of the Uruguayan Tabanidae fauna based on a comprehensive review of the literature, examination of historical material, recent field surveys, and validated records from citizen science. We recognized 52 valid species in 15 genera and six tribes, representing approximately 1% of the world diversity of the family. Four species are currently considered to be endemic to Uruguay. Since the last national revision, species richness has increased by 12%, largely through overlooked bibliographic records, the re-examination of museum specimens, and new distributional data. The fauna is dominated by the subfamily Tabaninae, particularly the tribes Diachlorini and Tabanini, whereas Pangoniinae is poorly represented. Males are described for 62% of the species, but immature stages are known for fewer than 20%, highlighting significant gaps in knowledge. Distributional data reveal a strong spatial bias: nearly half of the species are known from a single department, and four departments still lack records. A comparison with the Brazilian Pampa suggests that only slightly more than half of the species are shared, indicating that the regional fauna remains incompletely documented. Primary-type specimens are predominantly housed in European institutions, reflecting the historical development of Neotropical dipterology and the absence of resident specialists. Overall, our results suggest that the apparent modest diversity of Uruguayan Tabanidae likely reflects historical sampling bias, rather than true faunal impoverishment. Expanded field surveys and integrative taxonomic approaches are essential to clarify species limits, document immature stages, and better understand the biogeography of horse flies in the Pampa biome. Full article

Fifty-five batik textiles produced along coastal Java in the late 19th to early 20th century were analysed to study the red dyes and the cotton fabrics. Surface-Enhanced Raman Spectroscopy (SERS) classified the dyes into six groups and identified 70% of the samples as Morinda. High-Performance Liquid Chromatography coupled with a diode array detector and tandem Mass Spectrometry (HPLC-DAD-MS/MS) confirmed the SERS results and identified synthetic dyes in the remaining samples, which were used either alone or in mixtures with Morinda or indigo. Synthetic alizarin (C.I. 58000, Mordant Red 11) was the most frequently detected synthetic dye. Auramine O (C.I. 41000, Basic Yellow 2), fuchsin (C.I. 42510, Basic Violet 14), and rhodamine B (C.I. 45170, Basic Violet 10) were occasionally detected. The results also highlighted two possible types of Morinda and two variations of synthetic alizarin. The shades obtained from mixtures of natural and synthetic dyes were visually indistinguishable from those obtained with pure natural or synthetic dye, as confirmed by colourimetry. The variety of dyes and cotton fabrics shared across batik producers makes it challenging to attribute unsigned batiks to specific workshops. Nevertheless, this study demonstrated that synthetic dye uptake during this period was limited and experimental, with natural Morinda remaining the preferred choice despite the availability of European synthetic alternatives. Full article

For the first time, twenty spun polychrome glass figurines (considered as tangible cultural heritage objects) stylistically assigned to workshops of the city of Nevers from the 17th to 19th centuries have been analyzed at the Musée de la Faïence et des Beaux-Arts of Nevers using non-invasive XRF and Raman spectroscopy. The results are compared with those previously obtained for figurines assigned to the Perrot’s Orléans workshop. A wide variety of glass compositions is observed, ranging from lead-free to lead-rich compositions, which are attributed to the preparation technique that involves mixing glass stems of different origins during the creation of the figurine. White opacification is achieved with Ca₂Sb₂O₇. The cobalt source is consistently arsenic-rich, but its composition becomes more complex during the 18th century, indicating the use of different cobalt sources. A variety of lead-tin and Naples yellow pigments are identified. Metal nanoparticles are used for pink, ruby, and carnation colors. The detection of associated arsenic and/or tin supports the identification of the use of gold nanoparticles. Cassiterite and arsenates of lead/calcium/potassium are also detected in a few figurines, probably from a different workshop. This latter opacifier, being more frequent in previously studied artifacts assigned to Orléans, suggests that the assignment to Nevers could be questioned. Aventurine glass is present in two objects. Full article

Friar Hernando de Talavera can be considered the main strategist of evangelisation at the end of the 15th century in the recently conquered Kingdom of Granada. To this end, he used the publication Breve y muy provechosa doctrina de lo que debe saber todo cristiano together with eight other very useful treatises [Brief and Very Useful Doctrine of What Every Christian Should Know, with Eight Other Very Useful Treatises], which he accompanied with his Instrucción a los vecinos del Albaicín [Instruction to the Residents of the Albaicín]. Successive editions of the catechism and some books included under the generic title Breve y muy provechosa doctrina [A Brief and Very Useful Doctrine] throughout the 16th century demonstrated its doctrinal soundness and pastoral effectiveness. Furthermore, they were later used not only for catechesis but also for literacy in the Kingdom of Granada and in the early days of the American conquest. The study will systematically present the different editions and their intentions from the Granada incunabulum to the present day. The texts composed by the first archbishop of Granada were the words used to unite several kingdoms and conquered territories in the faith and in the Castilian language. The aim of this study is to provide a systematic overview of the various editions published throughout history and to analyse the influence that some of them exerted on the subsequent development of evangelisation in Granada, Castile, and possibly the Americas. Full article

Construction materials like steel and concrete have been used for thousands of years; however, their industrial-scale production began relatively recently in the 19th century. These materials are still being improved as the drive to build taller buildings, longer bridges, larger dams, and similar engineering marvels keeps pushing boundaries and requirements to previously unimaginable values. Yet, testing and characterization of construction materials that make all that progress possible are overshadowed in scientific literature by more trendy materials such as graphene, composites, nanomaterials, smart materials, and biomaterials. The objective of this review was to identify, collect, and systematically analyze recent papers in which the researchers performed experimental testing on construction materials to document how state-of-the-art experimental practice extends beyond what standardized protocols prescribe. This paper covers Uniaxial Tensile Testing (UT), Compact Tension C(T), Uniaxial Compression (UC), and Single Edge Notched Bending SEN(B), as they are the most commonly used and best-suited techniques for construction material analysis. State-of-the-art papers featuring these techniques were systematically gathered using AI-assisted literature discovery tools, and their contributions beyond ISO and ASTM standards were identified and summarized. Using this review, material scientists and engineers can quickly discover the most influential and relevant papers with the actual experimental data and can apply the testing procedures described in these papers in their laboratories so they can compare their results with the previously published measurements and make an engineering decision based on appropriate comparisons. Full article

The Santorini volcano attracts global interest. The 17th century BCE Minoan eruption was likely the largest ever occurring in the Holocene. The evaluation of an enriched collection of documentary sources combined with geological observations showed that in historical times, 15 eruption episodes were recorded from the 2nd century BCE up to 1950 CE. Little-known episodes occurring in 1667 CE and 1773 CE were uncovered, analyzed and included in the catalogue. Due to many uncertainties and inconsistencies involved in the historical sources, a reliability score ranging from 1 (lowest) to 4 (highest) has been assigned to each one of the 15 episodes. This procedure was based on a Reliability Assessment Matrix, which is a novelty in historical volcanology. The size of an eruption was evaluated in terms of the 8-grade Volcanic Explosivity Index (VEI) by introducing a bimodal assignment form of “V or V + 1”, an approach used for the first time, instead of the traditional unimodal assignment of “V”. The VEI of 4–5 was assigned to the eruptions of 725/726 CE in the Santorini caldera and of 1650 CE in the Kolumbo submarine volcano. The rest of the eruptions were assigned with smaller VEIs. Completeness analysis of the catalogue with statistical tests and Monte Carlo simulation with random and non-random models as baselines showed a 10-fold increase in the eruption record in 450 years after the breakpoint of 1572 CE eruption compared to the 1747 years before that point implying that there are about 30 missing eruption events that escaped record in the pre-1572 CE historical interval. This statistically significant difference is interpreted as a bias discovery effect of anthropogenic origin, but further research is needed to show that it does not represent a drastic change of magma plumbing rate. Full article

‘Analog horror’ is a subgenre of internet and media horror, beginning c.2015. Its texts use late 20th-century analogue technology as a locus of horror, both narratively and aesthetically, expressing contemporary technophobia and existential anxieties of the first quarter of the 21st century, using a deliberate and anarchic a-historicity to represent concerns surrounding techno-capitalism and its attendant ‘polycrisis’. This irreverent attitude to historical cause and effect, and technological progress, in subgenre texts such as “The Nixonverse” by creator Eve Casanas represents our modern-day conflict between the digital, techno-capitalist online world, and the corporeal crisis events affecting the real world. This diametric in analog horror expresses the central tenet of Mark Fisher’s concept of ‘capitalist realism’, the idea that capitalist ideology makes it appear that there are no viable alternatives to capitalism. In analog horror narratives, analogue–digital hybrid technologies channel techno-organic monster-figures, with the helplessness of the individual and/or groups to defeat these monstrosities being expressive of this capitalist realist impression that capitalism cannot be overcome, and its polycrisis avoided, enacting fantasies of societal destruction to alleviate this suspended state of anxious helplessness, in the tone of Freud’s ‘death drive’ wish fulfilment fantasies. Full article

A multi-analytical investigation was carried out to elucidate the deterioration processes affecting the stone materials of the Arca di Cansignorio della Scala in Verona (Italy) and to characterize the surviving traces of its original polychrome and gilded decoration. The study combined macroscopic mapping, stratigraphic sampling, optical microscopy (OM), environmental scanning electron microscopy coupled with energy-dispersive X ray spectroscopy (ESEM-EDS), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and ion chromatography (IC). The monument, predominantly carved from Candoglia marble, exhibits three principal weathering patterns: (i) rain washed areas affected by marble decohesion, (ii) grey deposits corresponding to dirt accumulation areas; and (iii) sulphation-induced black crusts developed in dirt wetting areas. In addition, severe mechanical deterioration was found to be associated with early twentieth-century structural consolidation interventions involving embedded iron bars, whose corrosion-driven volumetric expansion generated vertical cracking. Stratigraphic and microanalytical investigations revealed the presence of original azurite-based polychromy, proteinaceous and lipidic binding media, lead white preparatory layers, and multiple applications of gold leaf. The analytical results highlight the complex interplay between environmental exposure, atmospheric pollution, the incompatibility of materials introduced during past restorations campaigns. Furthermore, they contribute to a better understanding of the composition, execution techniques and preservation state of the surviving decorative layers, providing a scientific basis for future conservation strategies. Full article

Most school science curricula teach concepts developed prior to the 20th century, despite the failure of classical physics to explain foundational physics concepts such as atomic structures and forces. This is largely because science curricula parallel historical discoveries in science: classical physics is introduced first, followed by modern physics, which is reserved for upper secondary students since it is considered too abstract for young students. This delayed approached to teaching modern science hinders students’ ability to develop foundational ideas at an appropriate age. However, the Einstein-First project challenges this notion by introducing atoms and molecules to 7–8 year-olds through hands-on activities. This research paper presents the results from two schools, where 169 students participated in eight lessons on atoms and molecules. Student and teacher data were collected using quantitative and qualitative surveys. The student results showed that hands-on activities were effective in helping primary school students understand these so-called abstract concepts. Teachers reported that, with proper upskilling and resources, they were able to deliver the program and introduce terminology and foundational concepts effectively. This study highlights the effectiveness of hands-on activities in teaching abstract scientific concepts to primary students, paving the way for enhanced science education at an early stage. Full article

The blue, white, and black glazed areas of nineteen Nevers earthenware pieces bearing a date or precisely datable between 1589 and 1865 were for the first time analyzed by X-ray fluorescence spectroscopy at the Musée de la faïence et des Beaux-Arts-‘Frédéric Blandin’ in the city of Nevers by pXRF in order to categorize the raw materials and recipes used. The semi-quantitative signal comparison of major elements and impurities such as rubidium, strontium and zirconium shows the use of the same raw materials except for six artifacts. At least three types of cobalt, characterized by association with copper, nickel, and manganese, are observed. Different blacks (with manganese or bismuth) are observed. A comparison is made between the classification obtained with chemometry (z-score, PCA, and dendrograms of similarity) and a reasoned analysis of ternary diagrams based on the signal of the most characteristic elements. This preliminary work demonstrates the potential provided for the categorization of enameled ceramics and their dating through non-invasive on-site semi-quantitative elemental analyses. No important advantages were observed for the chemometric procedure: the same conclusions are obtained by quantitative comparisons of the XRF data, but the chemometric procedures allow a clear visualization of the main conclusions. Full article

The conceptualisations of the “sacred” and the “secular” are shaped by diverse entities in different epochs and spaces of society. Again, these conceptualisations often exhibit power dynamics, epistemic privileges, and the classification of people using the notions of human and non-human zones. In Africa, the historic intersectionality of the empire, mission, and conversion shaped, and continues to shape, the nuances of the sacred and secular in race, gender, and religion. Thus, this article used a desktop approach to analyse both the primary and secondary literature to explore the nuances of this phenomenon in this historic intersectionality and how its legacies continue to dominate the contemporary context. The preliminary findings showed that the historic missionary/colonial conceptualisations of the sacred and secular on race, gender, and religion remain the fulcrum of the contemporary narratives and their consequences. Thus, the article argues that decoloniality can serve as a lens in exploring this phenomenon and as an option to transform the current status quo. Full article

The First Balkan War was not merely a military defeat but also a crisis of knowledge production. Although there is a vast body of academic literature in Turkey focusing on the causes, consequences, and military failures of the war, the discursive dimension of Western correspondents’ narratives has not yet been sufficiently analyzed. This research examines correspondent narratives within an integrated religious-civilizational framework that combines Edward Said’s concept of “Orientalism,” Stuart Hall’s concept of “Representation,” and Maria Todorova’s concept of “Balkanism.” Employing Critical Discourse Analysis (CDA) based on Norman Fairclough’s three-dimensional model, the article investigates how reporter texts—often accepted as “transparent” primary sources in Turkish historiography—function as symbolic instruments of construction. By analyzing recurring representations of Turks as “fatalistic,” “pre-modern,” and “alien to European values,” the study reveals how these narratives legitimize a civilization hierarchy by exploiting the “Cross and Crescent” dichotomy. By revealing how these boundary-producing discourses transform military events into evidence of barbarism, the article challenges the claim of neutrality in archival records and contributes to the literature in this regard. By distinguishing between Orientalist representations of the Ottoman Turks and Balkanist representations of the Balkan nations, this study contributes to a more nuanced understanding of Western discursive hierarchies during the geopolitical crises of the early 20th century. Full article

Anthropogenic emissions have caused the Antarctic ozone hole, a major global environmental crisis since the late 20th century. Although ozone recovery began in the early 21st century, substantial uncertainty remains regarding the timing of its return to pre-loss levels. This study innovatively develops a “model optimization–bias correction” framework based on spatial pattern (S1) and long-term trend (S2) metrics, assessing 17 Chemistry-Climate Model Initiative Phase 1 (CCMI-1) models using the fifth generation of the European Centre for Medium-Range Weather Forecasts (ECMWF) atmospheric reanalysis for the climate (ERA5). Results: (1) Most models accurately reproduce the Antarctic ozone’s spatial distribution and long-term trends: MRI-ESM1r1 performs best for spatial patterns (S1 = 0.80), GEOSCCM for long-term trends (S2 = 0.82); EMAC-L90MA, UMSLIMCAT, etc., show poor spatial pattern performance (S1 < 0.30), while IPSL and EMAC-L90MA have large trend biases and underperform in trend simulation (S2 < 0.10). (2) Integrating S1 and S2 scores, the Preferred Multi-Model Ensemble comprising the top eight models (PMME8) minimizes ERA5 deviation, outperforming the multi-model ensemble (MME); the Combined Nonstationary Cumulative Distribution Function matching (CNCDFm) correction of this ensemble reduces systematic bias by 15–60%. (3) Antarctic ozone recovery time shows a gradual delay following optimal model selection and bias correction. PMME-adjusted projects recovery in October 2063 (2053–2072), later than MME (2052) and PMME (2058), with inter-member uncertainty narrowing from 43 years to 19 years. Similarly, this feature is also found for September, November, and the spring mean. This study provides a reliable methodological foundation for projections of Antarctic ozone recovery and offers scientific support for the compliance assessment and policy adjustment of the Montreal Protocol, thereby advancing environmental sustainability and global ozone governance. Full article

This study focuses on the construction sequence of three complex and atypical Scythian kurgans at the Vodoslavka burial ground in the Northern Sivash region, which incorporate several unique structural and ritual elements. One of the most striking features is the layer of mud applied to the ground surface prior to mound construction, which, in several cases, formed anthropomorphic outlines. Funerary feasting, which took place both before and during the burial ceremony, was just one of the other features. So too was the deliberate shaping of soil removed from the central grave into a spherical segment, and the ritual activity associated with this prepared spoil heap. Although the mounds’ preserved height is relatively modest (originally about 3–5 m), their internal organisation and the composition of the grave goods suggest that they were used for burying individuals of high status within Scythian society. The cemetery’s proximity to major salt lakes suggests that the local elite’s affluence may have been linked to their control over this vital resource. The architectural and depositional features of the kurgans can be interpreted as elements of a ritual system designed to ensure the deceased’s proper transition to the afterlife. The design of the burial chambers and the richness of the grave goods reflect a concern for the conditions of existence in the afterlife, while the associated manipulations of the sub-mound space and mound deposits, prepared surfaces, deliberately shaped spoil heaps, and related ritual practices can be understood as material markers and procedures intended to secure the successful passage of the deceased to the afterlife. Full article