bluuebunny/crossref_metadata_2025 huggingface dataset:
Escaping Damocles’ Sword: Endogenous Climate Shocks in a Growing Economy
Authors: Brausmann Alexandra , Bretschger Lucas
Published: February 2024

We consider a growing economy which is subject to recurring, random, uninsurable, and potentially large and long-lasting climate shocks leading to destruction of infrastructure, land degradation, collapse of ecosystems or similar loss of productive capacity. The associated damages and the hazard rate are endogenously driven by the stock of greenhouse gases. We highlight the important role of the relative risk aversion and provide analytical solutions for the optimal climate policy, the growth rate and the saving propensity of the economy. We stress the importance of jointly determining these variables, especially if the objective is to formulate meaningful policy prescriptions. If, for example, the growth rate or the saving rate are assumed to be exogenous, and thus independent of the characteristics of climate shocks and economic fundamentals, then future economic developments in the face of climate change and, consequently, the future mitigation efforts will deviate from the optimal paths. In a quantitative assessment we show that with log-utility and under favorable technological and climatic conditions the abatement expenditure represents only 0.5% of output, equivalent to $37 per ton carbon. Under less favorable conditions, coupled with a relative risk aversion which exceeds unity, the abatement propensity increases to 2.9%, equivalent to $212 per ton carbon, and it jumps to a striking 16% in the pessimistic scenario involving severe shocks and low efficiency of abatement technology.
Sex-specific ventral dichromatism and melanization in harlequin toads (Atelopus): a common but overlooked character of unknown function
Authors: Plewnia Amadeus , Lötters Stefan , Gomides Samuel , De Agrò Massimo , Rößler Daniela C.
Published: February 2024

Hidden colors are a widespread phenomenon in the animal kingdom, particularly in anurans. In some cases, hidden colors are suddenly exposed during defensive displays to startle predators, others seemingly remain hidden—particularly from researchers. Amazonian species of Neotropical harlequin toads (genus Atelopus) show striking and consistent ventral sexual dichromatism where females show and males generally lack melanization. Inspired by these observations we undertook a deeper inquiry across this species-rich genus. We collected data on ventral sexual dichromatism in Atelopus species and scored expression of sex-specific ventral melanization (i.e. black, brown and/or grey coloration). Ventral sexual dichromatism was present throughout the entire range of the genus and in almost all phylogenetic groups. However, there was a clear geographic signal with this trait being most common and widespread in Amazonian Atelopus species. Ventral melanization was correlated with temperature and elevation. Focusing on the Amazonian species, we present hypotheses on potential functions of sexually dimorphic ventral patterns and sex-specific ventral melanization as a baseline to further investigate the dynamics of sexual and natural selection as potential drivers of these traits. Selective pressures on less exposed body parts, such as ventral sides, likely differ considerably from those on dorsal appearance. Given the amount of research on amphibian coloration, it is remarkable how little we know about the evolution, function and underlying mechanisms of ventral appearance. We hope our work will spark more interest in the flip side of amphibians, thereby broadening our understanding of animal coloration.
Spectral Engineering for Optimal Signal Performance in the Microwave SQUID Multiplexer
Authors: Salum J. M. , García Redondo M. E. , Ferreyro L. P. , Bonilla-Neira J. , Müller N. , Geria J. M. , Bonaparte J. , Muscheid T. , Gartmann R. , Fuster A. , Almela A. , Hampel M. R. , Ardila-Perez L. E. , Sander O. , Kempf S. , Platino M. , Weber M. , Etchegoyen A.
Published: February 2024

We describe a technique to optimize the dynamic performance of microwave SQUID multiplexer (µMUX)-based systems. These systems proved to be adequate for reading out multiple cryogenic detectors simultaneously. However, the requirement for denser detector arrays to increase the sensitivity of scientific experiments makes its design a challenge. When modifying the readout power, there is a trade-off between decreasing the signal-to-noise ratio (SNR) and boosting the nonlinearities of the active devices. The latter is characterized by the spurious free dynamic range (SFDR) parameter and manifests as an increment in the intermodulation products and harmonics power. We estimate the optimal spectral location of the SQUID signal containing the detector information for different channels. Through the technique, what we refer to as Spectral Engineering, it is possible to minimize the SNR degradation while maximizing the SFDR of the detector signal, thus, overcoming the trade-off.
A defense of Isaacson’s thesis, or how to make sense of the boundaries of finite mathematics
Authors: Dopico Pablo
Published: February 2024

Daniel Isaacson has advanced an epistemic notion of arithmetical truth according to which the latter is the set of truths that we grasp on the basis of our understanding of the structure of natural numbers alone. Isaacson’s thesis is then the claim that Peano Arithmetic (PA) is the theory of finite mathematics, in the sense that it proves all and only arithmetical truths thus understood. In this paper, we raise a challenge for the thesis and show how it can be overcome. We introduce the concept of purity for theories of arithmetic: a theory of arithmetic is pure when it only proves arithmetical truths. Then, we argue that, under Isaacson’s thesis, some PA-provable truths—including transfinite induction claims for infinite ordinals and some consistency statements—are seemingly not arithmetical in Isaacson’s sense, and hence that Isaacson’s thesis might entail the impurity of PA. Nonetheless, we conjecture that the advocate of Isaacson’s thesis can avoid this undesirable consequence: the arithmetical nature, as understood by Isaacson, of all contentious PA-provable statements can be justified. As a case study, we explore how this is done for transfinite induction claims with infinite ordinals below $$\varepsilon _0$$

ε
0

. To this end, we show that the PA-proof of such claims employs exclusively resources from finite mathematics, and that ordinals below $$\varepsilon _0$$

ε
0

are finitary objects despite being infinite.
3-styrylcoumarin scaffold-based derivatives as a new approach for leishmaniasis intervention: biological and molecular modeling studies
Authors: Yepes Andrés F. , Robledo Sara M. , Quintero-Saumeth Jorge , Cardona-Galeano Wilson
Published: February 2024

Seven 3-styrylcoumarins were tested for antileishmanial activity against Leishmania (Viannia) panamensis amastigotes. Cytotoxic activity was also evaluated against mammalian U-937 cells. The 3-methoxy-4-hydroxy coumarin derivative 6 was the most active with an IC50 of 40.5 µM, and did not reveal any conspicuous toxicity toward mammalian U-937 cells. Therefore, it may have potential to be considered as candidate for antileishmanial drug development. Further, among several druggable Leishmania targets, molecular docking studies revealed that compound 6 had docking preference by the N-myristoyltransferase (Lp-NMT) of Leishmania panamensis, showing a higher docking score of − 10.1 kcal mol−1 than positive controls and making this protein as a presumably druggable target for this compound. On the other hand, molecular dynamics simulations affirm the docking hypothesis, showing a conformational stability of the 6/Lp-NMT complex throughout 100 ns simulation. Moreover, the molecular mechanics/Poisson–Boltzmann surface area method also support the docking findings, revealing a total free energy of binding of − 47.26 ± 0.08 kcal mol−1, and identifying through energy decomposition analysis that those key aminoacids are contributing strongly to ligand binding. Finally, an optimal pharmacokinetic profile was also estimated for 6. Altogether, coumarin 6 could be addressed as starting point for further pharmacological studies concerning the therapeutic leishmaniasis intervention.

Graphical abstract
Association Between 18F-FDG PET Activity and HER2 Status in Breast Cancer Brain Metastases
Authors: Young Jonathan R. , Ressler Julie A. , Mortimer Joanne E. , Schmolze Daniel , Fitzgibbons Mariko , Chen Bihong T.
Published: February 2024

Purpose

The objective of this study was to evaluate whether uptake on 18F-fluorodeoxyglucose (18F-FDG) PET could help differentiate HER2-positive from HER2-negative breast cancer brain metastases.

Methods

In this retrospective, cross-sectional study of a cohort of 14 histologically proven breast cancer brain metastases, we analyzed both preoperative 18F-FDG PET/CT and HER2 status of the resected/biopsied brain specimens. The maximum standardized uptake values (SUVmax) of the lesions were normalized to contralateral normal white matter and compared using Mann–Whitney U tests.

Results

The study cohort was comprised of 12 women with breast cancer with a mean age of 59 years (range: 43–76 years) with a total of 14 distinct brain metastatic lesions. The SUVmax ratio of HER2-positive breast cancer brain metastases was significantly greater than that of HER2-negative lesions (3.98 vs 1.79, U = 38.00, p = 0.008).

Conclusion

The SUVmax ratio may help to identify the HER2 status of breast cancer brain metastases, if validated prospectively.
Does information about MIH on dental homepages in Germany offer high quality? A systematic search and analysis
Authors: Geiken A. , Banz L. , Kock M. , Schwendicke F. , Graetz C.
Published: February 2024

Purpose

The internet is increasingly used to seek health information. A dental condition of increasing concern and public interest is molar incisor hypomineralisation (MIH), why we evaluated the information quality of German dentists ‘websites on the topic of MIH.

Methods

A systematic search was performed by two independent investigators using three search engines. The information content of websites on MIH and technical, functional aspects, overall quality, and risk of bias were assessed using validated instruments (LIDA, DISCERN). Practice-related characteristics (practice type, specialization, setting, number and mean age of dentists) were recorded, and associations of these characteristics with websites’ overall quality were explored using multivariable linear regression modelling.

Results

70 sites were included. 52% were multipractices in urban areas (49%). The most common age group was middle-aged individuals (41–50 years). The average number of dentists/practice was 2.5. The majority met more than 50% of the DISCERN and LIDA criteria (90%, 91%). The MIH definition was frequently used (67%), MIH symptoms were described (64%), and 58% mentioned therapies. The prevalence of MIH was mentioned less frequently (48%). MIH example photographs were rarely shown (14%). In multivariable analysis, most practice-related factors were not significant for overall site quality. Only chain practices had slightly higher quality in this regard (2.2; 95% CI of 0.3–4.1).

Conclusions

MIH is mentioned on a large proportion of dentists’ websites. Overall technical, functional, and generic quality was high. Risk of bias is limited. While most websites provided a basic definition of MIH and its symptoms, important information for patients was missing.
Spelling and Autism: a Narrative Review of Recent Developments and Directions for New Research Priorities
Authors: Bailey Benjamin , Ray Karen
Published: February 2024

Purpose of Review

This review provides a critical overview of recent research on spelling and autism, highlighting developments and future research priorities.

Recent Findings

It has long been known that some children with autism have difficulty learning to spell. Recent studies have explored the reasons why these children have difficulty learning to spell and how they are best supported to learn to spell.

Spelling development has been linked to various factors in groups of autistic children, with language skills and intellectual functioning identified as key contributors to spelling achievement. Autistic and non-autistic children appear to draw on similar processes when spelling and may benefit from similar forms of instruction. Additional participatory research guided by autistic children, their parents and teachers is needed to further our understanding of spelling development and efficacious spelling instruction for autistic children. Potential avenues for future research are presented.
Perihilar FSGS lesions originate from flat parietal epithelial cells
Authors: Chia-Gil Arnaldo , Floege Jürgen , Stamellou Eleni , Moeller Marcus J.
Published: February 2024

Graphical Abstract
Development of Experimental Low-Cost Rain Gauges and their Evaluation During a High Intensity Storm Event
Authors: Dervos Nikolaos A. , Baltas Evangelos A.
Published: February 2024

The measurement of rainfall via ground sensors is fundamental in a variety of hydrological applications, including rainfall-runoff simulations, basin water balance and flood forecasting. The tipping bucket rain gauge (TBR) constitutes the most common type of automatic gauge for the measurement of rainfall intensity. The objective of this work is the development of low-cost and reliable rain gauges, including their data logger, which could be installed at remote, rural areas, in order to supplement with rainfall data the limited or non-existing network of hydrological stations. To achieve this target, two experimental TBRs with diameters of 20 cm (RG20) and 28 cm (RG28) were developed. Electronic boards Arduino UNO and Raspberry Pi were used for their data logger. The measurements of RG20 and RG28 were compared with those of a high quality rain gauge ARG100 and a daily non-recording rain gauge. The cyclone Daniel on 06-09-2023 caused an intermittent storm event in the city of Athens, Greece, which was measured by all three TBRs for purposes of evaluation. The results showed that the variations between ARG100 and RG28 were lower than 6%, while the variations between ARG100 and RG20 were about 10% during a few time intervals of high rainfall intensity. The return period of the storm event were estimated at 43, 59 and 45 years for rainfall durations of 10, 20 and 30 min, respectively.
The search for neutrinoless double-beta decay
Authors: Gómez-Cadenas Juan José , Martín-Albo Justo , Menéndez Javier , Mezzetto Mauro , Monrabal Francesc , Sorel Michel
Published: February 2024

Neutrinos are the only particles in the Standard Model that could be Majorana fermions, that is, completely neutral fermions that are their own antiparticles. The most sensitive known experimental method to verify whether neutrinos are Majorana particles is the search for neutrinoless double-beta decay. The last 2 decades have witnessed the development of a vigorous program of neutrinoless double-beta decay experiments, spanning several isotopes and developing different strategies to handle the backgrounds masking a possible signal. In addition, remarkable progress has been made in the understanding of the nuclear matrix elements of neutrinoless double-beta decay, thus reducing a substantial part of the theoretical uncertainties affecting the particle–physics interpretation of the process. On the other hand, the negative results by several experiments, combined with the hints that the neutrino mass ordering could be normal, may imply very long lifetimes for the neutrinoless double-beta decay process. In this report, we review the main aspects of such process, the recent progress on theoretical ideas and the experimental state of the art. We then consider the experimental challenges to be addressed to increase the sensitivity to detect the process in the likely case that lifetimes are much longer than currently explored, and discuss a selection of the most promising experimental efforts.
Optoelectronic Synapses Based on MXene/Violet Phosphorus van der Waals Heterojunctions for Visual-Olfactory Crossmodal Perception
Authors: Ma Hailong , Fang Huajing , Xie Xinxing , Liu Yanming , Tian He , Chai Yang
Published: February 2024

The crossmodal interaction of different senses, which is an important basis for learning and memory in the human brain, is highly desired to be mimicked at the device level for developing neuromorphic crossmodal perception, but related researches are scarce. Here, we demonstrate an optoelectronic synapse for vision-olfactory crossmodal perception based on MXene/violet phosphorus (VP) van der Waals heterojunctions. Benefiting from the efficient separation and transport of photogenerated carriers facilitated by conductive MXene, the photoelectric responsivity of VP is dramatically enhanced by 7 orders of magnitude, reaching up to 7.7 A W−1. Excited by ultraviolet light, multiple synaptic functions, including excitatory postsynaptic currents, paired-pulse facilitation, short/long-term plasticity and “learning-experience” behavior, were demonstrated with a low power consumption. Furthermore, the proposed optoelectronic synapse exhibits distinct synaptic behaviors in different gas environments, enabling it to simulate the interaction of visual and olfactory information for crossmodal perception. This work demonstrates the great potential of VP in optoelectronics and provides a promising platform for applications such as virtual reality and neurorobotics.
An outbreak of Verticillium dahliae on sycamore maple in a forest stand in Slovenia
Authors: Brglez Ana , Devetak Zina , Ogris Nikica , Radišek Sebastjan , Piškur Barbara
Published: February 2024

Verticillium dahliae Kleb., the causal agent of Verticillium wilts, is a devastating plant disease affecting many plant species. Fungus V. dahliae was detected in a partially artificially established Acer pseudoplatanus L. forest stand in central Slovenia. This finding incited further study about the risk of different sources of V. dahliae isolates for maples in forests and the pathogenicity of three V. dahliae isolates of different origins was tested on saplings of A. pseudoplatanus, A. platanoides L., and A. campestre L. The inoculated saplings exhibited disease symptoms, i.e., leaf necrosis and wilting. At the end of the pathogenicity test, typical xylem browning was visible on the cross-sections, and the pathogen was successfully re-isolated. The isolates showed significant differences in their pathogenicity to specific maple hosts, with the agricultural isolate (originated from bell pepper) being the most aggressive on all three maple species. The disease severity index (DSI) and relative area under the disease progress curve (rAUDPC), as well as the success of re-isolation, indicate that A. platanoides is the most susceptible to inoculation with V. dahliae. In addition, significant differences in sapling biomass were observed between treated and control plants. These results suggest that maples in forest stands are threatened by V. dahliae, and biosecurity measures should be considered and implemented in forest management to reduce the transmission and potential spread of the pathogen.
Near-Optimal Feedback Guidance for Low-Thrust Earth Orbit Transfers
Authors: Atmaca D. , Pontani M.
Published: February 2024

This research describes a near-optimal feedback guidance, based on nonlinear orbit control, for low-thrust Earth orbit transfers. Lyapunov stability theory leads to proving that although several equilibria exist, only the desired operational conditions are associated with a stable equilibrium. This ensures quasi-global asymptotic convergence toward the desired final orbit. The dynamical model includes the effect of eclipsing on the available thrust, as well as all the relevant orbit perturbations, such as several harmonics of the geopotential, solar radiation pressure, aerodynamic drag, and gravitational attraction due to the Sun and the Moon. Near-optimality of the feedback guidance comes from careful selection of the control gains. They are identified in two steps. Step (a) is an extensive table search in which the gains are changed in a large interval. Step (b) uses a numerical optimization algorithm that refines the gains found in (a), while minimizing the time of flight. For the numerical simulations, two scenarios are defined: (i) nominal conditions and (ii) nonnominal conditions, which arise from orbit injection errors and stochastic failures of the propulsion system. For case (i), gain optimization leads to obtaining numerical results very close to those corresponding to a known optimal orbit transfer with eclipse arcs. Moreover, for case (ii), extensive Monte Carlo simulations demonstrate that the nonlinear feedback guidance at hand is effective in driving a spacecraft from a low Earth orbit to a geostationary orbit, also in the presence of nonnominal flight conditions.
Modified Playfair for Text File Encryption and Meticulous Decryption with Arbitrary Fillers by Septenary Quadrate Pattern
Authors: Sugirtham N. , Jenny R. Sherine , Thiyaneswaran B. , Kumarganesh S. , Venkatesan C. , Sagayam K. Martin , Dang Lam , Dinh Linh , Dang Hien
Published: February 2024

Cryptography secures data and serves to ensure the confidentiality of records. Playfair is a cryptographic symmetrical algorithm that encrypts statistics based on key costs. This secret is shared with an authorized person to retrieve data. In the conventional pattern, there is an area complexity and deficiency in letters, numbers, and special characters. This hassle has been overcome in previous studies by editing pattern dimensions. The fillers used throughout the enciphering were not eliminated during the retrieval process, which resulted in the indiscrimination of the retrieved statistics. The proposed method uses a separate quadrate pattern that strengthens the Playfair cipher and guarantees that the fillers are eliminated to ensure the authentic retrieval of records. The fillers indiscriminate and strengthen the set of rules in opposition to brute force and avalanche impact. The proposed algorithm was evaluated with a minimal change in the key, and was found to have an avalanche effect between 65% and 93.7%. The encrypted document is further encoded using the Lempel–Ziv–Markov chain algorithm (LZMA) to provide compressed second-level secured text with a compression ratio of 0.75 for a file size of 100 KB. The pattern was designed to subsidize the integrated characters found on the keyboard.
The interrelationship amid carbon emissions, tourism, economy, and energy use in Brazil
Authors: Raihan Asif
Published: February 2024

Tourism serves as a crucial means of funding national development and ensuring the sustainability of local livelihoods in growing countries such as Brazil. Nevertheless, the accelerated growth of tourism in various nations might lead to significant environmental consequences due to heightened energy consumption. This surge in energy usage contributes to the exacerbation of global warming through the amplified release of carbon dioxide (CO2). In light of the increasingly evident impacts of climate change on the natural environment, a multitude of endeavors have been undertaken with the aim of attaining ecological sustainability. The objective of this study is to examine the dynamic effects of economic growth, energy consumption, and tourism on carbon emissions in Brazil by analyzing time series data spanning from 1990 to 2019. The stationarity of data was assessed through the application of unit root tests, while an autoregressive distributed lag (ARDL) approach was employed to analyze the relationship between the components, accounting for both the long-term and short-term dynamics. The empirical results indicate that a 1% rise in economic growth, energy consumption, and tourist arrivals leads to environmental deterioration by causing a respective increase in CO2 emissions of 1.37%, 1.06%, and 0.57% in the near term, and 0.72%, 0.62%, and 0.16% in the long term. This article presents policy ideas aimed at achieving carbon neutrality in Brazil by increasing the utilization of renewable energy sources, while simultaneously fostering sustainable tourism as a means to enhance the country’s economy.

Highlights

•This study investigated the tourism-economy-energy-environment nexus in Brazil.

•The econometric analysis revealed that tourism, energy use, and economic growth increase CO2 emissions.

•This article offers policy suggestions to achieve sustainable tourism and carbon neutrality.

Graphical Abstract
Evaluate the differences in carbon sink contribution of different ecological engineering projects
Authors: Zeng Jingyu , Zhou Tao , Tan E , Xu Yixin , Lin Qiaoyu , Zhang Yajie , Wu Xuemei , Zhang Jingzhou , Liu Xia , Zhang Qi
Published: February 2024

China has implemented a series of ecological engineering projects to help achieve the 2060 carbon neutrality target. However, the lack of quantitative research on ecological engineering and the contribution of climate change to terrestrial carbon sinks limits this goal. This study uses robust statistical models combined with multiple terrestrial biosphere models to quantify the impact of China's ecological engineering on terrestrial ecosystem carbon sink trends and their differences according to the difference between reality and nonpractice assumptions. The main conclusions include the following: (1) since 1901, 84% of terrestrial ecosystem carbon sinks in China have shown an increasing trend, and approximately 45% of regional carbon sinks have increased by more than 0.1 g C/m2 every 10 years. (2) Considering the impact of human activities and the implementation of ecological engineering in China, approximately 56% of carbon sinks have improved, and approximately 10% of the regions whose carbon sink growth exceeds 50 g C m−2 yr−1 are mainly in the southeast coastal of China. (3) The carbon sequestration potential and effect of the Sanjiangyuan ecological protection and construction project are better than others, at 1.26 g C m−2 yr−1 and 14.13%, respectively. The Beijing–Tianjin sandstorm source comprehensive control project helps alleviate the reduction in carbon sinks, while the southwest karst rocky desertification comprehensive control project may aggravate the reduction in carbon sinks. This study clarifies the potential of China's different ecological engineering to increase carbon sink potential, and distinguishes and quantifies the contribution of climate and human activity factors to it, which is of great significance to the system management optimization scheme of terrestrial ecosystems and can effectively serve the national carbon neutral strategy.

Graphical Abstract
A First Guide to Computational Modelling in Physics
Authors: Scharoch Pawel , Polak Maciej P. , Szymon Radosław , Holodnik-Malecka Katarzyna
Published: February 2024

This innovative text helps demystify numerical modelling for early-stage physics and engineering students. It takes a hands-on, project-based approach, with each chapter focusing on an intriguing physics problem taken from classical mechanics, electrodynamics, thermodynamics, astrophysics, and quantum mechanics. To solve these problems, students must apply different numerical methods for themselves, building up their knowledge and practical skills organically. Each project includes a discussion of the fundamentals, the mathematical formulation of the problem, an introduction to the numerical methods and algorithms, and exercises, with solutions available to instructors. The methods presented focus primarily on differential equations, both ordinary and partial, as well as basic mathematical operations. Developed over many years of teaching a computational modelling course, this stand-alone book equips students with an essential numerical modelling toolkit for today's data-driven landscape, and gives them new ways to explore science and engineering.
Jews, Christians, and the Discourse on Images before Iconoclasm
Authors: Sivertsev Alexei M.
Published: February 2024

Between the sixth and eighth centuries CE, the image emerged as a rhetorical category in religious literature produced in the Mediterranean basin. The development was not a uniquely Christian phenomenon. Rather, it emerged in the context of broader debates about symbolic forms that took place across a wide range of ethnic, linguistic, and religious groups who inhabited the late Roman and early Byzantine world. In this book, Alexei Sivertsev demonstrates how Jewish texts serve as an important, and until recently overlooked, witness to the formation of image discourse and associated practices of image veneration in late antiquity and the early Middle Ages. Addressing the role of the image as a rhetorical device in Jewish liturgical poetry, Sivertsev also considers the theme of the engraved image of Jacob in its early Byzantine context and the aesthetics of spaces that bridge the gap between the material and the immaterial in early Byzantine imagination.
V. S. Naipaul and World Literature
Authors: Mishra Vijay
Published: February 2024

V. S. Naipaul is a major and controversial figure in postcolonial and world literature. This book provides a challenging and uncompromisingly honest study that engages with history, genre theory, aesthetics, and global literary culture, with close reference to Naipaul's published and archival material. In his fiction and creative histories, the definition of the modern idea of world literature is informed by the importance of an artistic ordering of perception. Although often expressing ideas that are prejudicial and morally repugnant, there is an honesty in his writings where one finds extraordinary insights into how life is experienced within colonial structures of power. These colonial structures provided no abstract unity to the field of literary expression and ignored vernacular cultures. The book argues that a universal ideology of the aesthetic, transcending time, regions, and languages, provides world literature with a unity which is possible only within a critical universal humanism attuned to heroic readings of texts and cultures.
Finite-time attitude tracking control of stratospheric airship in the presence of multiple disturbances
Authors: Li Z.B. , He D.P. , Zhang J.Q. , Meng X.R.
Published: February 2024

This paper proposes a composite non-singular fast terminal sliding mode attitude control scheme based on a reduced-order extended state observer for the stratospheric airship’s attitude system affected by multiple disturbances. First, the feedback linearisation method is applied to address the nonlinearity of the attitude motion model and achieve decoupling of the model in three channels. Second, the overall disturbances, encompassing airship parameter perturbations and external disturbances, are treated as an aggregate. A reduced-order extended state observer is designed for each channel to formulate a composite non-singular fast terminal sliding mode surface. In the control design phase, the hyperbolic sine function is adopted as replacement for the sign function to ensure the continuity of the control signal. The estimated disturbances are incorporated in the control law design to directly offset the effects of multiple disturbances on the attitude motion of the airship. Third, based on Lyapunov theory, it has been proven that the control law can drive the attitude tracking error to converge to zero within a finite time. Simulation results demonstrate that the proposed control scheme exhibits favorable disturbance rejection capability, as well as higher tracking accuracy and faster response speed.
Aerodynamic design of a high-efficiency two-stage axial turbine, using streamline curvature method and performance optimisation by clocking of stator blades
Authors: Taghavi Zenouz R. , Abiri S.M.M.
Published: February 2024

Aerodynamic design of a high-efficiency two-stage axial turbine is carried out using a hybrid method through implantation of a two-step design procedure. In the first step, the well-known streamline curvature (SLC) and free vortex (FV) methods are properly combined to establish three-dimensional geometries of the blades at each row and to obtain the flow field properties. The second step is provided to obtain the highest aerodynamic efficiency by optimum clocking of the second stator blades relative to the first ones through executing steady and unsteady computational fluid dynamics (CFD) of three-dimensional viscous flow. Slight discrepancies were observed between gas dynamics results of the SLC and those of CFD. Total pressure and temperature at the turbine outlet, obtained from SLC method, differed from those obtained by 3D-CFD technique by 13.06% and 1.88% respectively. Aerodynamic efficiency of the turbine is obtained about 91.83%, based on 3D-CFD. Time-averaged results showed that under the optimum clocking of the second row stator blades, inlet total pressure and output power of the second rotor increase by 0.23%, and 0.93%, respectively, in comparison to the worst clocking case. These augmentations resulted in increased total to total efficiency of the second stage by 0.444%. Additionally, the total output power of the two stages increased by 0.71% through the optimum clocking. Modeling the unsteady wake flow trajectory within the blades passages confirmed that all of these beneficial effects happen if the upstream wake impinges on the leading edge region of the second stator blades.
“A labor of love”: Integrating mental health and HIV care: Lessons from a multicountry mental health learning network
Authors: Moitra Modhurima , Gonese Gloria , Mukherjee Madhuri , White Belinda , Young Dorraine , Collins Pamela Y.
Published: February 2024

Mental health conditions among people living with HIV (PLWH) are important to address as they adversely affect quality of life, impede adherence to HIV treatment and increase mortality. Planning for integrating mental health care in resource-limited HIV care settings requires substantial effort. Learning networks are a useful way to exchange knowledge between countries about best and current practices in planning mental health care for PLWH. This paper describes the launch of a mental health learning network within a global health implementing center and the lessons learned across participating members from six countries: the United States, Jamaica, Trinidad and Tobago, Zimbabwe, Malawi and India. Lessons learned from the learning network sessions spanned four broad domains: (i) the need for routine and integrated mental health data collection, (ii) developing standardized protocols to implement mental health care, (iii) adequate training and supervision of health care staff and (iv) prioritization of mental health care integration by program funders. We find that time and resource constraints can be barriers to shared leadership and sustainability of learning networks. Prioritizing learning networks as an important component of integrated HIV and mental health care programs is one of the potential strategies to ensure long-term continuity.
Community and Conflict in the Chronicle of Bury St Edmunds
Authors: NELSON EMMA J.
Published: February 2024

Jocelin of Brakelond's chronicle provides a remarkably detailed account of conflict within the monastic community of Bury St Edmunds over the course of two decades in the late twelfth century, tracing the convent's division into factions following the death of the negligent Abbot Hugh, the controversial election of his successor Samson, and the community's subsequent difficulty negotiating its relationship with him. This article examines the position of conflict within Jocelin's narrative, and argues that it played a fundamental role in shaping the monastic experience by mediating relationships within the convent and between the convent and the abbot.
Using power analysis and spatial prioritization to evaluate the design of a forest bird monitoring programme
Authors: Southwell Darren M. , Smart Adam , Merson Samuel D. , Selwood Katherine E. , Macgregor Nicholas A.
Published: February 2024

Biodiversity monitoring programmes should be designed with sufficient statistical power to detect population change. Here we evaluated the statistical power of monitoring to detect declines in the occupancy of forest birds on Christmas Island, Australia. We fitted zero-inflated binomial models to 3 years of repeat detection data (2011, 2013 and 2015) to estimate single-visit detection probabilities for four species of concern: the Christmas Island imperial pigeonDucula whartoni, Christmas Island white-eyeZosterops natalis, Christmas Island thrushTurdus poliocephalus erythropleurusand Christmas Island emerald doveChalcophaps indica natalis. We combined detection probabilities with maps of occupancy to simulate data collected over the next 10 years for alternative monitoring designs and for different declines in occupancy (10–50%). Specifically, we explored how the number of sites (60, 128, 300, 500), the interval between surveys (1–5 years), the number of repeat visits (2–4 visits) and the location of sites influenced power. Power was high (> 80%) for the imperial pigeon, white-eye and thrush for most scenarios, except for when only 60 sites were surveyed or a 10% decline in occupancy was simulated over 10 years. For the emerald dove, which is the rarest of the four species and has a patchy distribution, power was low in almost all scenarios tested. Prioritizing monitoring towards core habitat for this species only slightly improved power to detect declines. Our study demonstrates how data collected during the early stages of monitoring can be analysed in simulation tools to fine-tune future survey design decisions.
Path planning for robots in preform weaving based on learning from demonstration
Authors: Meng Zhuo , Li Shuo , Zhang Yujing , Sun Yize
Published: February 2024

A collision-free path planning method is proposed based on learning from demonstration (LfD) to address the challenges of cumbersome manual teaching operations caused by complex action of yarn storage, variable mechanism positions, and limited workspace in preform weaving. First, by utilizing extreme learning machines (ELM) to autonomously learn the teaching data of yarn storage, the mapping relationship between the starting and ending points and the teaching path points is constructed to obtain the imitation path with similar storage actions under the starting and ending points of the new task. Second, an improved rapidly expanding random trees (IRRT) method with adaptive direction and step size is proposed to expand path points with high quality. Finally, taking the spatical guidance point of imitation path as the target direction of IRRT, the expansion direction is biased toward the imitation path to obtain a collision-free path that meets the action yarn storage. The results of different yarn storage examples show that the ELM-IRRT method can plan the yarn storage path within 2s–5s when the position of the mechanism changes in narrow spaces, avoiding tedious manual operations that program the robot movements, which is feasible and effective.
Investigating Crimean–Congo haemorrhagic fever virus seropositivity in camels and human behavioural risks in an abattoir in Nigeria
Authors: Adamu Andrew Musa , Onoja Anyebe Bernard , Ugbodu Victoria Ehinor , Bala Reuben Sylvester , Maina Meshach , Salisu Usman Shehu , Pewan Shedrach Benjamin , David Emmanuel , Malgwi Arhyel , Adamu Cornelius , Adeiza Abdulrahman , Herbert Megan , Horwood Paul , Adegboye Oyelola
Published: February 2024

Crimean–Congo haemorrhagic fever virus (CCHFV) is an emerging viral pathogen with pandemic potential that is often misdiagnosed. Case fatality in low-resource settings could be up to 40% due to close contact between animals and humans. A two-year cross-sectional study was conducted in Fagge abattoir, Kano State, Nigeria, to estimate the seropositivity of CCHFV in camels using a commercial multi-species competitive enzyme-linked immunosorbent assay (ELISA). A closed-ended questionnaire was administered to the abattoir workers to assess their awareness, mitigation, and behavioural practices associated with CCHF. Of the 184 camels tested, 179 (97%) were seropositive for CCHFV (95% confidence interval (CI): 93.77, 99.11). The median (interquartile range (IQR)) age of respondents was 41 (35–52), with 62% having no education. Respondents had little knowledge about CCHFV and the concept of zoonotic disease. In this study, the high estimated prevalence of antibodies to CCHFV in camels highlights the heightened risk of transmission of CCHFV in Nigeria. Similarly, a concerning lack of knowledge and inadequate preventive practices, alongside a prevalence of high-risk behaviours associated with CCHF among abattoir workers, were noted in this study. Thus, there is an urgent need for comprehensive public health education and collaborative One Health strategies to avert the threats of spillover events.
Identifying barriers and facilitators to increase fibre intakes in UK primary school children and exploring the acceptability of intervention components: a UK qualitative study
Authors: Donin Angela S , Goldsmith Lucy P , Sharp Clare , Wahlich Charlotte , Whincup Peter H , Ussher Michael H
Published: February 2024

Objective:

Within the UK, dietary fibre intakes are well below recommended intakes and associated with increased risk of obesity. This study aimed to explore the views of parents and children on barriers and facilitators to increasing fibre intakes and improving diets, alongside investigating the appropriateness of intervention components to overcome modifiable barriers.

Design:

Qualitative study including semi-structured interviews and focus groups informed by the Theoretical Domains Framework (TDF) and the Capability-Opportunity-Motivation-Behaviour (COM-B) model.

Participants:

Year 5 children (aged 9–10-years) and parents, recruited through London primary schools

Results:

A total of twenty-four participants (eleven parents and thirteen children) took part. Five key themes were identified as barriers and facilitators, namely lack of (and improving) knowledge, social factors (including parent–child conflicts, limited time for food preparation, influence of peer and family members), current eating habits, influence of the school, community and home environment in shaping eating behaviours, and the importance of choice and variety in finding foods that are healthy and tasty. Parents strongly supported school-based dietary interventions to enable consistent messaging at home and school and help support dietary behaviour change. Practical sessions (such as workshops to strengthen knowledge, taste tests and food swap ideas) were supported by parents and children.

Conclusions:

By using a theory-driven approach to explore the barriers and facilitators to increasing fibre intake, this research identified important themes and modifiable barriers to behaviour change and identifies acceptable intervention components to overcome barriers and bring about sustained dietary behaviour change in primary school children.
Comparing situational influences on differential healthcare utilization trajectories in patients on home palliative care: A qualitative study
Authors: Yoon Sungwon , Goh Hendra , Yeo Zhi Zheng , Yang Grace Meijuan , Chong Poh Heng , Zhuang Qingyuan
Published: February 2024

Objectives

Patients with terminal cancer receiving home palliative care present differential healthcare utilization trajectories before death. It remains unclear which situational elements influence these trajectories among disparate patient groups. The aim of this study was to compare situational influences on “persistently high” and “low stable” trajectories of healthcare utilization in patients who received palliative care support at home.

Methods

Bereaved family caregivers were recruited from our prior quantitative study investigating healthcare utilization trajectories in oncology patients on home-based palliative care. In-depth interviews were conducted with 30 family caregivers. Data were analyzed using thematic analysis.

Results

Analysis of data uncovered how the 2 utilization trajectories were influenced by the interplay of 1 or more of 4 situational elements. Perceived symptom control in patients, influenced by their determination to die at home, shapes the susceptibility to situational contingencies, resulting in differential utilization trajectories. Caregivers’ mental readiness in dealing with unexpected circumstances has a significant impact on the overall manageability of care, ultimately affecting decisions related to healthcare utilization. The concordance between symptom needs and scope of homecare services in a given situation proves to be an important determinant. Lastly, perceived accessibility to informal support in times of need acts as a contextual reinforcement, either preventing or precipitating decisions regarding healthcare utilizations.

Significance of results

Our findings hold important implications for the provision of homecare services, in particular, the need for comprehensive assessment of end-of-life wishes during homecare enrolment and strengthening psychological preparedness of caregivers. Expansion of home-based clinical interventions tailored to high utilizers, and funding for temporary in-home respite should be considered to optimally manage potentially preventable acute healthcare utilization.
Multi-band circularly polarized antenna for WLAN and WiMAX applications based on characteristic mode theory
Authors: Yang Yutong , Qi Zihang , Chen Yongxin , Li Xiuping
Published: February 2024

A multi-band circularly polarized antenna is proposed for WLAN (2.4/5.3/5.8 GHz) and WiMAX (3.5 GHz) applications. The proposed antenna is constructed of a radiation patch and a reflecting metal ground. Characteristic mode theory is utilized to analyze the modes of the patch and based on these results the antenna is optimized. The −10 dB impedance bandwidths of the proposed antenna are 53.53% (2.4–4.15 GHz) and 47.28% (5.25–8.5 GHz), respectively. The antenna radiates left-handed circular polarization in the lower band and right-handed circular polarization in the upper band. A maximum gain of 10 dBic is achieved for the proposed antenna.
Constraining Projected Changes in Rare Intense Precipitation Events Across Global Land Regions
Authors: Li Chao , Sun Qiaohong , Wang Jianyu , Liang Yongxiao , Zwiers Francis W. , Zhang Xuebin , Li Tong
Published: February 2024

Rare precipitation events with return periods of multiple decades to hundreds of years are particularly damaging to natural and societal systems. Projections of such rare, damaging precipitation events in the future climate are, however, subject to large inter‐model variations. We show that a substantial portion of these differences can be ascribed to the projected warming uncertainty, and can be robustly reduced by using the warming observed during recent decades as an observational constraint, implemented either by directly constraining the projections with the observed warming or by conditioning them on constrained warming projections, as verified by extensive model‐based cross‐validation. The temperature constraint reduces >40% of the warming‐induced uncertainty in the projected intensification of future rare daily precipitation events for a climate that is 2°C warmer than preindustrial across most regions. This uncertainty reduction together with validation of the reliability of the projections should permit more confident adaptation planning at regional levels.