Direct numerical simulation (DNS) studies of power-law (PL) fluids are performed for purely viscous-shear-thinning ($n\in [0.5,0.75]$), Newtonian ($n=1$) and purely viscous-shear-thickening ($n=2.0$) fluids, considering two Reynolds numbers ($Re_{\tau }\in [395,590]$), and both smooth and rough surfaces. We carefully designed a numerical experiment to isolate key effects and simplify the complex problem of turbulent flow of non-Newtonian fluids over rough surfaces, enabling the development of a theoretical model to explain the observed phenomena and provide predictions. The DNS results of the present work were validated against literature data for smooth and rough Newtonian turbulent flows, as well as smooth shear-thinning cases. A new analytical expression for the mean velocity profile – extending the classical Blasius $1/7$ profile to power-law fluids – was proposed and validated. In contrast to common belief, the decrease in $n$ leads to smaller Kolmogorov length scales and the formation of larger structures, requiring finer grids and longer computational domains for accurate simulations. Our results confirm that purely viscous shear-thinning fluids exhibit drag reduction, while shear-thickening fluids display an opposite trend. Interestingly, we found that viscous-thinning turbulence shares similarities with Newtonian transitional flows, resembling the behaviour of shear-thinning, extensional-thickening viscoelastic fluids. This observation suggests that the extensional and elastic effects in turbulent flows within constant cross-section geometries may not be significant. However, the shear-thickening case exhibits characteristics similar to high-Reynolds-number Newtonian turbulence, suggesting that phenomena observed in such flows could be studied at significantly lower Reynolds numbers, reducing computational costs. In the analysis of rough channels, we found that the recirculation bubble between two roughness elements is mildly influenced by the thinning nature of the fluid. Moreover, we observed that shear-thinning alters the flow in the fully rough regime, where the friction factor typically reaches a plateau. Our results indicate the possibility that, at sufficiently high Reynolds numbers, this plateau may not exist for shear-thinning fluids. Finally, we provide detailed turbulence statistics for different rheologies, allowing, for the first time, an in-depth study of the effects of rheology on turbulent flow over rough surfaces.

A COVID-19 pandemic gown conservation strategy for methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant enterococci (VRE) asymptomatically colonized patients caused no significant difference in healthcare-associated MRSA (HA-MRSA) bacteremia, healthcare-associated VRE (HA-VRE) bacteremia, or healthcare-associated Clostridioides difficile infections (HA-CDI) versus prepandemic contact precautions (CP). Postpandemic HA-VRE and HA-CDI rates mirrored national trends.

The scope of unconscious processing has long been, and still remains, a hotly debated issue. This is driven in part by the current diversity of methods to manipulate and measure perceptual consciousness. Here, we provide ten recommendations and nine outstanding issues about designing experimental paradigms, analyzing data, and reporting the results of studies on unconscious processing. These were formed through dialogue among a group of researchers representing a range of theoretical backgrounds. We acknowledge that some of these recommendations naturally do not align with some existing approaches and are likely to change following theoretical and methodological development. Nevertheless, we hold that at this stage of the field they are instrumental in evoking a much-needed discussion about the norms of studying unconscious processes and helping researchers make more informed decisions when designing experiments. In the long run, we aim for this paper and future discussions around the outstanding issues to lead to a more convergent corpus of knowledge about the extent – and limits – of unconscious processing.

This article examines the measurement systems used in the built environment of Xochicalco, a significant Epiclassic archaeological site located in Central Mexico. Through careful analysis of the dimensions of the various structures, we identified two primary measurement units: U7 (1.47 m) and U8 (1.68 m). These units exhibit similarities to the Mayan zapal and Nahua maitl, which have been previously documented across diverse temporal contexts and other regions within Mesoamerica. The investigation revealed patterns in the application of these units related to orientation, functionality, and construction methods, indicating meticulous planning and potential symbolic importance. The frequent use of measurements that are multiples of three, four, nine, and twelve times the base units suggests the utilization of standardized measuring instruments. This study enhances our understanding of Mesoamerican measurement practices, particularly at Xochicalco, and provides insights into cultural interactions and construction traditions during the Epiclassic period.

Financial relief proceedings come after divorce proceedings, whether in the same jurisdiction or not. In most cases, whether proceedings can continue against the other party is not an issue; the difficulty usually lies in the determination of the outcome of the financial relief proceedings. However, what happens when one party to the proceedings passes away before proceedings conclude? This was the crux of Unger and Another (in substitution for Hasan) v Ul-Hasan (Deceased) and Another [2023] UKSC 22 (Unger).

The Galapagos sea lion (Zalophus wollebaeki) is an endemic and endangered species that plays a vital role in the ecosystem dynamics of the archipelago. In recent decades, they have faced a significant population decline, related to the effects of climate variability and anthropogenic influences. Thus, the co-occurrence of sea lion resting areas with mosquito breeding sites and the presence of free-roaming domestic dogs present significant health risks related to parasite transmission. This research demonstrates the occurrence of Dirofilaria immitis (canine heartworm) in Z. wollebaeki, indicating their possible function as a definitive host for this parasite. Blood samples collected in August 2023 from 50 individuals (juveniles and adults) in 2 rookeries of San Cristóbal Island, revealed a 2% prevalence of D. immitis in juvenile females, as confirmed by Knott’s test and polymerase chain reaction analysis. Results of this work emphasize the critical necessity for effective monitoring and conservation strategies to address the threat posed by D. immitis and to safeguard this endangered species.

Human language is increasingly written rather than just spoken, primarily due to the proliferation of digital technology in modern life. This trend has enabled the creation of generative artificial intelligence (AI) trained on corpora containing trillions of words extracted from text on the internet. However, current language theory inadequately addresses digital text communication’s unique characteristics and constraints. This paper systematically analyzes and synthesizes existing literature to map the theoretical landscape of digitized language. The evidence demonstrates that, parallel to spoken language, features of written communication are frequently correlated with the socially constructed demographic identities of writers, a phenomenon we refer to as “digital accents.” This conceptualization raises complex ontological questions about the nature of digital text and its relationship to social identity. The same line of questioning, in conjunction with recent research, shows how generative AI systematically fails to capture the breadth of expression observed in human writing, an outcome we call “homogeneity-by-design.” By approaching text-based language from this theoretical framework while acknowledging its inherent limitations, social scientists studying language can strengthen their critical analysis of AI systems and contribute meaningful insights to their development and improvement.

In this text, I interpret Hegel’s concept of the family within the context of his theory of freedom. I take family life to entail a certain tension between freedom and nature that makes it necessary to reflect on the role of nature in our understanding of the family. For this, I examine two ways of understanding the family’s relation to nature, a conservative and a liberal one, to then offer a third, dialectical way as an alternative. My central argument is that Hegel’s concept of the family can be read as a response to the problem of our entanglement with nature and is thereby an integral part of his theory of ethical life and freedom. For this, I outline the normative principle underlying Hegel’s family concept that I will call ‘the notion of a self-conscious genus-process’ (Gattungsprozess). This notion enables an immanent critique of Hegel’s concept of the family without abandoning his dialectical conception of the relationship between freedom and nature.

The Serengeti National Park and the Ngorongoro National Park are well-known for their migratory herds of large herbivores. These migrations are suggested to be due to different nutritional needs of the large herbivores over the year. The nutritional needs of the large herbivores are fulfilled by the different nutrient content of the grassland biomass. Soil nutrient availability is at least partly controlling the nutrient content of the grassland biomass despite plant-specific nutrient uptake mechanisms. Despite lot of data existing on the nutrient content of the grassland biomass in this area, less is known about the nutrient availability of the soils, especially for the transect from the Ngorongoro crater via the Ngorongoro Conservation area to the centre of the Serengeti National Park in Tanzania. Here we present a dataset on the availability of carbon, nitrogen, magnesium, aluminium, silicon, phosphorus, potassium, calcium, manganese and iron in the soils along this transect at 16 sampling points. Our data clearly show that the nutrient availability in the soils along this transect strongly differs with higher values of aluminium, silicon, potassium and calcium near the border of Serengeti National Park. These differences in soil nutrient availability might be the reason for different nutrient content in grassland biomass in certain areas, hence potentially affecting the migration of the herds of large herbivores as found by other studies. As our dataset is not comprehensive, we call for collection and analysis of more samples and also soil profile analysis in this area as our dataset is limited.