bluuebunny/crossref_metadata_2025_split huggingface dataset:
Rhenium recovery from highly concentrated sulfuric media using AMR anionite in column mode
Authors: Korovin Vadym , Pohorielov Yurii , Shestak Yurii , Valiaiev Oleksandr , Cortina Jose-Luis 
Published: April 2023

Abstract
The paper deals with the study of rhenium recovery by AMR anionite from model high-acidic sulfuric solution as well as its desorption by ammonia solution in column experiments. Total dynamic exchange capacity was calculated. Experimental data were processed using the Thomas, Yoon-Nelson and Bed Depth Service Time models, basic parameters were calculated. It was found that total dynamic exchange capacity calculated by Thomas fit was the closest to the experimental value. Rhenium desorption was examined using ammonia solution. Rhenium recovery degree and concentration factor were calculated. The elution curve featured a clear peak that allows producing eluate with high rhenium concentration. The presented results may be used when designing technologies for rhenium sorption from different process solutions and during recycling rhenium-containing alloy wastes.
Enhancement of the rock mass quality in underground iron ore mining through application of resource-saving technologies
Authors: Pysmennyi Serhii , Fedko Mykhailo , Chukharev Serhii , Sakhno Ivan , Moraru Roland , Panayotov Vladko 
Published: April 2023

Annotation
In terms of mining and geological structure, ore deposits are complex-structured and composed of single, parallel-contiguous ore bodies. The reserves of barren or ore inclusions with the useful component content less than the cut-off grade of the deposit on the whole make 5-12% for natural-rich ores, and 10-15% for natural-lean ores. Application of conventional systems to mining complex-structured ore deposit areas underground reduces the iron content in the mined ore mass by 3-6% in relation to the main content of the useful component in the ore deposit or increases ore losses 1.5-2.0 times of the standard ones. This leads to a decrease in efficiency of mining the reserves, and as a result, a loss of the world sales market. Application of the resource-saving technologies reduces ore losses and dilution in underground mining, thereby reducing the cost of ore mass processing. As compared with conventional systems, the proposed options of mining systems with ore caving enable increasing the average iron content in the mined ore mass by 2.37-7.03% without increased ore production costs. These indicators are confirmed by laboratory tests on models with natural materials, considering the scale of modeling.
Study of parameters and regimes of pressureless flow in a channel with overboard overflow
Authors: Semenenko Yevhen , Medvedieva Olha , Medyanyk Volodymyr , Buketov Valentyn 
Published: April 2023

Abstract
There were studied the changes of pressureless flow parameters: flow rate and height of the liquid layer, within section of the overboard overflow across the side of the channel, as well as the dependence of the length of this link on the parameters of the channel and flow. It was established that when calculating with engineering accuracy the height of the overflow above the side of the channel and the flow rate along the channel from the length of existence of the overflow layer, only the effect of the effective flow coefficient should be taken into account. The dependence of the dimensionless height of the overflow above the side of the channel on the dimensionless length of the overboard overflow has a clear extreme character, and the dependence of the dimensionless flow along the channel on the dimensionless length of existence of the overboard overflow does not have a clear extreme character. The dependence of the dimensionless length of the overboard overflow on the effective flow rate is well approximated by a power function with a negative fractional exponent and it can be characterized by the absence of extrema and curvature change points, and asymptotically approaches zero at infinity.
Studying the geobarier ability of furnace slag
Authors: Frolova Liliia , Khlopytskyi Oleksii , Kashkalda Nataliia , Ivanchenko Hanna 
Published: April 2023

Abstract
Environmental pollution with mining waste containing dangerous metal cations necessitates the development of technologies for their disposal. This study proposes the use of blast furnace slag as a geobarrier for binding heavy metal cations. Such parameters as slag mass, temperature and time were used to determine the degree of binding of ferum and zinc cations when they are present together. A central rotatable composite experimental design was used to verify the results. According to the plan, the experiments were performed and the optimal conditions were determined with the help of statistical analysis. It was noted that a simultaneous increase in temperature and treatment time increases the degree of conversion for both ferric and zinc cations. An increase in the mass of slag leads to a decrease in the temperature and interaction time for ferum and zinc cations. However, for zinc cations, the maximum degree of conversion is 43.3% with their simultaneous presence. Experimental results showed that slag was more effective as a base for binding ferum and zinc cations with a conversion rate of 63.3% in concentrated solutions. The resulting regularities allow, by varying the process parameters, to bind metal cations in their joint presence.
Forecast of the mine workings destruction risks by the radiometric control method
Authors: Slashchov Ihor , Bielikov Anatolii , Kulbach Andrii , Slashchova Olena 
Published: April 2023

Abstract
The stress-strain state of the rock mass affects the content of methane gas and radon aerosols in the atmosphere of mine workings. Therefore, combined control of methane gas and radon in mine workings allows us to monitor changes in the state of the rock massif and to take measures in proper time to reduce the risks of the roadway destruction. Forecasting of rock massif and mine roadway dangerous state is based on the determined features of methane gas emission together with radon decay products into the mine roadways radon decay products. Interdependence between the dynamics of changes in the concentration of methane gas and the normalized concentration of radon is established when range of the deviations from the average value is ± 20%. Abrupt spikes at the range above 40% are explained in prone-to-destruction zones of the rock massif. One of the indicators of the rock massif readiness for dynamic manifestations of rock pressure and the destruction of mine roadways can be a decrease in the concentration of radon decay products Po218 below 5%.
Standardized Cumulative Metrics of Excess Mortality to Monitor Health System Resilience Throughout COVID-19 and Other Respiratory Virus Resurgences
Authors: Magiorkinis Gkikas 
Published: April 2023

Abstract
Monitoring morbidity and mortality in resurgences of respiratory infections poses significant challenges, as shown by coronavirus disease 2019 (COVID-19). For example, case fatality rates and deaths attributed to specific respiratory pathogens are known to suffer from significant biases undermining their comparability through time and space. As a result, it is difficult to evaluate the protective effect of public health interventions or quantify the impact of a resurgence on the general population through direct recording of COVID-19 related deaths. To overcome these limitations, more robust, less-biased metrics, such as all-cause deaths, have been proposed for monitoring the effect of an epidemic over a population and over time. More specifically, metrics of excess mortality over time, which have been used for influenza surveillance in the past, are increasingly considered important for COVID-19 surveillance. Here, we discuss excess mortality surveillance focusing on standardized single-point and standardized cumulative metrics that allow comparability of excess mortality through space and time. We explain why z score allows for comparison of excess mortality between countries and different periods, while cumulative z score allows assessment of excess mortality over long periods. Our commentary reiterates the importance of standardized statistics of excess mortality for COVID-19 surveillance as we move toward a coexistence with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) that will allow drawing conclusions from best practices in different health systems and different periods.
Anthropogenic changes to the nighttime environment
Authors: Gaston Kevin J , Gardner Alexandra S , Cox Daniel T C 
Published: April 2023

AbstractHow the relative impacts of anthropogenic pressures on the natural environment vary between different taxonomic groups, habitats, and geographic regions is increasingly well established. By contrast, the times of day at which those pressures are most forcefully exerted or have greatest influence are not well understood. The impact on the nighttime environment bears particular scrutiny, given that for practical reasons (e.g., researchers themselves belong to a diurnal species), most studies on the impacts of anthropogenic pressures are conducted during the daytime on organisms that are predominantly day active or in ways that do not differentiate between daytime and nighttime. In the present article, we synthesize the current state of knowledge of impacts of anthropogenic pressures on the nighttime environment, highlighting key findings and examples. The evidence available suggests that the nighttime environment is under intense stress across increasing areas of the world, especially from nighttime pollution, climate change, and overexploitation of resources.
Intersectionality in African digital organizing: a Ghanaian perspective
Authors: Mohammed Wunpini Fatimata 
Published: April 2023

Abstract
Although there is growing scholarship on intersectionality in African feminist movements, there are still gaps in scholarship on intersectionality on the continent when it comes to various identity categories. I examine intersectionality within the Ghanaian context using African feminisms as a backdrop. I argue that to drive African feminisms toward emancipatory praxes, it is imperative to center identity categories that are often erased from feminist conversations and to pay attention to organizing from these margins to amplify the erased narratives about marginalization. I theorize these silenced narratives drawing on my experiences as a Muslim Dagbana woman and my work in African and Ghanaian feminist digital spaces. Here, I focus on ethnicity as an identity category that is often overlooked within feminist discourses in national contexts in Africa. I point to organizing strategies that can facilitate the centering of identities and feminist issues that have historically been pushed to the margins.
“Fight as a little girl!”: Chilean feminist cyberactivism and its outcome on the agenda
Authors: Lagos Lira Claudia , Bachmann Ingrid 
Published: April 2023

Abstract
While feminist activism in Chile has been historically marginalized from the public debate, a new generation of digitally native, educated, and empowered feminist activists in Chile has embraced social media, algorithms and other technologies to denounce patriarchal order and advance social change toward gender equality. In this article, we argue that such strategy has given visibility to women’s issues in the Chilean public sphere and contributed to important inroads in matters of gender justice.
Intersectionality in/through Nigeria’s feminist hashtag activism
Authors: Faniyi Ololade 
Published: April 2023

Abstract
This article examines Nigerian feminist hashtag activism as this reveals how activists emplace and embody intersectionality in their organizings. I explore how a politics of intersectionality is institutionalized in Nigerian feminist hashtag activism on Twitter by unpacking the narratives that led to the emergence and online production of visibility for some hashtag activism that have shaped local and national politics in Nigeria. I further discuss intersectionality as a critical praxis and analytical strategy influencing activists' hashtag naming, political demands, and self-corrections in response to Nigeria's socio-cultural-political domains. As a feminist activist who has done some groundwork in Nigerian offline and digital spaces, this article draws from my participant/observer perspective.
Incidence and outcomes of emergency intraprocedural surgical conversion during transcatheter aortic valve implantation: Insights from a large tertiary care centre
Authors: Marin-Cuartas Mateo , de Waha Suzanne , Naumann Stefanie , Deo Salil V , Kang Jagdip , Noack Thilo , Hoyer Alexandro , Holzhey David , Leontyev Sergey , Saeed Diyar , Misfeld Martin , Meineri Massimiliano , Ender Joerg , Abdel-Wahab Mohamed , Desch Steffen , Thiele Holger , Borger Michael A , Kiefer Philipp 
Published: April 2023

Abstract

OBJECTIVE
During a transcatheter aortic valve implant (TAVI) procedure, intraprocedural complications that are manageable only by conversion to emergency open-heart surgery (E-OHS) occasionally occur. Contemporary data on the incidence and outcome of TAVI patients undergoing E-OHS are scarce. This study aimed to evaluate early and midterm outcomes following E-OHS of patients undergoing TAVI in a large tertiary care centre with immediate surgical backup availability for all TAVI procedures over a 15-year period.

METHODS
Data from all patients undergoing transfemoral TAVI between 2006 and 2020 at the Heart Centre Leipzig were analysed. The study time was divided into 3 periods: 2006–2010 (P1), 2011–2015 (P2) and 2016–2020 (P3). Patients were grouped according to their surgical risk (high risk: EuroSCORE II ≥ 6%; low/intermediate risk: EuroSCORE II &lt;6%). Primary outcomes were intraprocedural and in-hospital death and 1-year survival.

RESULTS
During the study period, a total of 6903 patients underwent transfemoral TAVI. Among them, 74 (1.1%) required E-OHS [high risk, n = 66 (89.2%); low/intermediate risk, n = 8 (10.8%)]. The rate of patients requiring E-OHS was 3.5% (20/577 patients), 1.8% (35/1967 patients) and 0.4% (19/4359 patients) in study periods P1 to P3, respectively (P &lt; 0.001). The proportion of patients who had E-OHS who were low/intermediate risk increased considerably over time (P1:0%; P28.6%; P3:26.3%; P = 0.077). Intraprocedural deaths occurred in 10 patients (13.5%), all of whom were high-risk. In-hospital mortality was 62.1% in high-risk patients and 12.5% in low/intermediate risk patients (P = 0.007). One-year survival was 37.8% in all patients undergoing E-OHS, 31.8% in high-risk patients and 87.5% in low/intermediate risk patients (log-rank P = 0.002).

CONCLUSIONS
In-hospital and 1-year survival rates following E-OHS are higher in low/intermediate risk than in high-risk patients undergoing TAVI. An on-site cardiac surgical department with immediately available E-OHS capabilities is an important component of the TAVI team.
Aridification, precipitations and crop productivity: evidence from the aridity index
Authors: Malpede Maurizio , Percoco Marco 
Published: April 2023

Abstract
The economic effects of global warming have gained considerable attention in the recent economic literature. While the relationship between rainfall and agriculture is well known, precipitations alone do not capture the soil water availability, which depends on the evaporation of the water (potential evapotranspiration [PET]). This paper presents evidence of the relationship between aridification and agricultural productivity. We show that areas that have experienced increased precipitations have become arider due to increased PET. We then project future aridification patterns. We find that the global arid area will increase by 3.9 per cent by 2040. This implies a global loss of about 20 million tons of maize, 19 million tons of rice, 8 million tons of soybeans and 21 million tons of wheat until 2040 if no action to combat desertification is taken.
The coherence function and lithospheric elastic thickness of the Zagros fold and thrust belt
Authors: Ghalehnovi Samira , Ardestani Vahid E , Pysklywec Russell N , Balouch Mehrdad 
Published: April 2023

SUMMARY
This study derives the spatial variation of the elastic thickness (Te) and its implications for understanding the structure, geodynamic and seismicity of the lithosphere for the Zagros fold and thrust belt region of the Arabia–Eurasia collision zone. Te is calculated using the coherence function in the fan wavelet domain based on recent terrestrial Bouguer gravity and topography data as input signals. Utilizing the load deconvolution method and Brent's method of 1-D minimization, the final Te for the survey region is estimated for each grid node of the studied area. To illustrate the mass distribution in the studied area, the subsurface loading fraction (F) is calculated simultaneously with Te in the inversion. The crust thickness and density from three different global crustal models are tested and the results obtained for these input models do not yield substantially different Te patterns. The final results are in accord with the global Te models as well as previous rheological, geodynamical and flexural studies, however, this study establishes much more detailed regional information. The calculations yield a mean value of Te of 61 km for the Zagros, with a mean estimated error of about 5 km. The high-Te values (&gt;70 km) are observed in the southeast of the studied area (some parts of the Sanandaj–Sirjan zone, Urumieh–Dokhtar magmatic arc and most of the Central Iranian blocks); while over most of the northwest of the studied area, the value of Te is about 58 km. The Te results are consistent with the lithospheric structure of the study area and also support the idea of the crust–mantle decoupling. Further, there is a positive and negative correlation between the surface wave velocity and surface heat flow, respectively. The mean value estimated for the internal loading friction (F) of 0.4 means in most of the studied areas we may consider that the surface loading is dominant, or at least the ratio of the surface and subsurface loading can be assumed equal. Based on earthquake distribution in the period 1900–2020, seismicity is more likely to occur in areas with a relatively low value of Te.
On performance of vertical gravity gradient determined from CryoSat-2 altimeter data over Arabian Sea
Authors: Zhou Ruichen , Liu Xin , Li Zhen , Sun Yu , Yuan Jiajia , Guo Jinyun , Ardalan Alireza A 
Published: April 2023

SUMMARYHigh-precision and high-resolution satellite altimetry data from CryoSat-2 are widely utilized for marine gravity inversion. The vertical gravity gradient is a crucial parameter of the Earth's gravity field. To evaluate the performance of vertical gravity gradient determined from CryoSat-2 altimeter data, the pre-processed along-track sea surface heights (SSHs) are obtained through error correction. The study area focused on the Arabian Sea and its surrounding region, where the along-track geoid was derived by subtracting the mean dynamic topography of the ocean from the along-track SSH of CryoSat-2. The residual along-track geoidal gradients were obtained by adjusting the along-track geoid gradients calculated from CryoSat-2 altimeter data using the remove-restore method. This was done by subtracting the geoid gradients calculated by the gravity field model XGM2019e_2159. After obtaining the residual along-track geoidal gradients, the residual gridded deflections of the vertical (DOV) are calculated using the least-squares collocation (LSC) method. The residual gridded DOV are then used to compute the residual gridded gravity anomaly gradients in the study area using the finite-difference method. After restoring the gravity anomaly gradients computed by the XGM2019e_2159 model, a high-resolution gravity anomaly gradient model with a resolution of 1′ ×1′ is obtained for the Arabian Sea and its surrounding area. To evaluate the accuracy of the gravity anomaly gradient model derived from CryoSat-2, it was compared with the SIO V32.1 gravity anomaly gradient model released by the Scripps Institution of Oceanography. The comparison showed that the root mean square (RMS) of the differences between the two models is 7.69E, demonstrating the high accuracy and precision of the vertical gravity gradient determined from CryoSat-2 altimeter data.
Re-imagining Reproduction: The Queer Possibilities of Plants
Authors: Subramaniam Banu , Bartlett Madelaine 
Published: April 2023

SynopsisHow did plant sexuality come to so hauntingly resemble human sexual formations? How did plant biology come to theorize plant sexuality with binary formulations of male/female, sex/gender, sperm/egg, active males and passive females—all of which resemble western categories of sex, gender, and sexuality? Tracing the extant language of sex and sexuality in plant reproductive biology, we examine the histories of science to explore how plant reproductive biology emerged historically from formations of colonial racial and sexual politics and how evolutionary biology was premised on the imaginations of racialized heterosexual romance. Drawing on key examples, the paper aims to (un)read plant sexuality and sexual anatomy and bodies to imagine new possibilities for plant sex, sexualities, and their relationalities. In short, plant sex and sexuality are not two different objects of inquiry but are intimately related—it is their inter-relation that is the focus of this essay. One of the key impulses from the humanities that we bring to this essay is a careful consideration of how terms and terminologies are related to each other historically and culturally. In anthropomorphizing plants, if plant sexuality were modeled on human sexual formations, might a re-imagination of plant sexuality open new vistas for the biological sciences? While our definitions of plant sexuality will always be informed by contemporary society and culture, interrogating the histories of our theories and terminologies can help us reimagine a biology that allows for new and more accurate understandings of plants, plant biology, and the evolution of reproduction.