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The subsistence economies of prehistoric pastoralists of the Eurasian steppes have long been viewed through an oversimplified model of reliance on domesticated animals. This conceptualization has begun to shift dramatically through the introduction of scientific analyses, pivoting towards an evidence-based interpretation of economic flexibility and adaptive heterogeneity. Here we provide insights into the dietary practices of Iron Age pastoralists in Siberia through an archaeoparasitological analysis. Soil samples from the Tunnug 1 site in southern Siberia reveal the presence of helminth eggs of Taenia sp . (likely), Trichuris sp ., and Dibothriocephalus sp . This indicates that the diet of the analysed prehistoric population might have included beef and did include freshwater fish, occasionally consumed in undercooked or raw form. Despite the primary reliance on pastoralism and possibly small-scale millet agriculture, these populations engaged in diverse dietary practices, including fish consumption. Additionally, the presence of Trichuris sp. eggs points to poor sanitary conditions, possible consumption of contaminated plant foods, and the contamination of drinking water with feces. By providing direct evidence of dietary habits, archaeoparasitology complements isotopic analyses and contributes to a more nuanced understanding of the subsistence strategies.

The medieval Turks of the eastern Asian steppe are known for funerary finds exalting horsemanship and military heroism that thrived on intertribal warfare. Existing bodies of research on various categories of objects—which include architecture, stelae, grave goods and inhumations—are in depth but highly regionalized. As a result, our understanding of the archaeological culture of the Turks on a spatio-temporal scale commensurate with territorial shifts in their political dominion throughout the period of the Turk khaganates (mid-6th to mid-8th centuries CE) remains disjunct. The present paper addresses this problem of disparate data. We present a synthesis of the archaeological research of medieval Turks spanning Mongolia, southern Siberia, and Xinjiang in view of results of the excavation of medieval burials at Tunnug 1 in Tuva Republic—where Turkic remains are dispersed and not easily distinguishable from other funerary cultures of connecting time periods. We argue that Turkic funerary culture can be better characterized as polymorphic–the presence of different regional amalgams of burial traditions. The horse-and-human burials and commemorative ogradka known to be quintessentially Turkic are but one of the more dominant amalgams. This pattern of differential practices is congruent with the history of medieval Turks evolving as peoples of mixed lineages and political groupings, rather than people of a unitary culture.

Archaeological landscapes can be obscured by environmental factors, rendering conventional visual interpretation of optical data problematic. The absence of evidence can lead to seemingly empty locations and isolated monuments. This, in turn, influences the cultural–historical interpretation of archaeological sites. Here, we assess the potential of integrating thermal and magnetic remote sensing methods in the detection and mapping of buried archaeological structures. The area of interest in an alluvial plain in Tuva Republic makes the application of standard methods like optical remote sensing and field walking impractical, as natural vegetation features effectively hide anthropogenic structures. We combined drone-based aerial thermography and airborne and ground-based magnetometry to establish an approach to reliably identifying stone structures concealed within alluvial soils. The data integration led to the discovery of nine buried archaeological structures in proximity to an Early Iron Age royal tomb, shedding light on ritual land use continuity patterns.

From the end of the Xiongnu Empire to the establishment of the first Turkic Khaganate, the territory of Southern Siberia sees the emergence of distinctive local material cultures. The Kokel culture is essentially unknown in the international English-language literature even though archaeological sites pertaining to this material culture are among the most common in Tuva (Southern Siberia). This makes them important for the understanding aspects of the sociocultural dynamics following the collapse of the first “steppe empire”. Here we present the results of the study of a Kokel funerary site recently excavated near the Early Iron Age kurgan Tunnug 1 and discuss the data in the context of the available Soviet and Russian literature. The Kokel culture substantially differs from the material culture of the Xiongnu and has to be seen as a largely independent cultural entity of small tribal groups without a pronounced social hierarchy engaging in frequent violent local conflict.

This article analyses the architecture of the Early Iron Age royal burial mound Tunnug 1 in the “Siberian Valley of the Kings” in Tuva Republic, Russia. This large monument is paramount for the archaeological exploration of the early Scythian period in the Eurasian steppes, but environmental parameters make research on site difficult and require the application of a diversity of methods. We thus integrate WorldView-2 and ALOS-2 remote sensing data, geoelectric resistivity and geomagnetic survey results, photogrammetry-based DEMs, and ortho-photographs, as well as excavation in order to explore different aspects of the funerary architecture of this early nomadic monument. We find that the large royal tomb comprises of a complex internal structure of radial features and chambers, and a rich periphery of funerary and ritual structures. Geomagnetometry proved to be the most effective approach for a detailed evaluation of the funerary architecture in our case. The parallel application of several surveying methods is advisable since dataset comparison is indispensable for providing context.

A plethora of studies in conjugated polymer modification is aimed at improving their physicochemical properties for practical application. Functionalization of polyaniline (PANI) by introducing a substituent on the aromatic ring is an effective way to achieve high solubility. In this regard, this study was focused on the investigation of the thermal stability of three PANI derivatives with ortho-substituents of various structures using thermogravimetric analysis at different heating rates (5, 10, 15, and 20 °C min −1 ) in a nitrogen atmosphere. The results of TGA and DTG showed that the process of thermal degradation of PANI derivatives proceeded according to a complex multistage mechanism. Using the Coats–Redfern integral method and 10 basic models, activation energies and pre-exponential factors were calculated for three stages of polymer thermal degradation. According to the results, with the highest linear regression coefficient, the second-order reaction model (F2) was the most suitable for the initial period of decomposition, while diffusion (D1, D2, D3) and interfacial (S1, S2) models were suitable for high-temperature stages. All models showed a positive Δ H . The highest Δ G values were obtained using diffusion and interfacial models.

Synthetic aperture radar has been employed for archaeological purposes for nearly forty years: nonetheless, its application among archaeological practitioners has remained limited. We analyzed circular anthropogenic anomalies in a steppe environment in PALSAR-2 data, which appeared as a homogeneous group of signatures. Each anomaly was examined using additional SAR and optical data, as well as investigated through extensive ground truth and, in one case, excavation. We found the anomalies to originate from a wide range of processes and structural characteristics showing the non-intuitive complexity of SAR data interpretation. We found that this is likely the reason for the limited application SAR has seen within the archaeological community. In order to improve the usage of SAR for archaeological purposes beyond change detection and digital elevation models, specific products that are more readily understandable and superior to optical data in a narrow frame of application should be developed.

Natural science subjects have always been the most challenging for students in schools and universities. While the pandemic brought about a lot of new challenges, it also gave academics the chance to test out evaluation methodologies they had previously thought about but hadn't used in a relatively low-risk setting. The programmed learning approach is a teaching and learning pedagogy that creates better learning experiences. Therefore, this systematic literature review focuses on the impact of programmed instruction on the learning process. The analysis was made based on the PRISMA review methodology. Five databases were searched to find 33 articles about the benefits of programmed instruction in science education published between 1970 and 2022. In terms of research participants, the majority of the studies (14 studies) focused on undergraduate students, college students (5 studies), lecturers/teachers (3 studies), mixed (2 studies), and adults (1 study). Our systematic review found the following benefits of programmed learning: effective and fun teaching approaches, proven favourable impacts on behaviour change, increased scores for college and secondary school students, and raised students' interest.

Two-wheeled horse-drawn chariot depictions in the Eurasian steppe have long been stylistically dated to the Bronze Age. Here we present an example of a petroglyph embedded in the architecture of an early Scythian royal tomb in the Tuva Republic, Siberia. The construction of the tomb is dated through wiggle-matching to between 833 and 800 BCE (95.4%) thus providing a rare terminus ante quem for chariot depictions in southern Siberia. The new evidence supports the current chronological range for this type of petroglyph in the Eurasian steppe belt.

Given a complex algebraic hypersurface H , we introduce a subset of the Newton polytope of the defining polynomial for H which is a polyhedral complex and enjoys the key topological and combinatorial properties of the amoeba of H for a large class of hypersurfaces. We provide an explicit formula for this polyhedral complex in the case when the spine of the amoeba is dual to a triangulation of the Newton polytope of the defining polynomial. In particular, this yields a description of the polyhedral complex when the hypersurface is optimal (Forsberg et al. in Adv Math 151:45–70, 2000 ). We conjecture that a polyhedral complex with these properties exists in general.