bluuebunny/crossref_metadata_2025_split huggingface dataset:
Rockburst prevention by microwave destressing: a numerical investigation
Authors: Yang Chun , Zhou Keping , Zhang Quan , He Manchao , Gao Feng , Xiong Xin , Pan Zheng , Topa Ameen 
Published: February 2024

AbstractRockbursts are a complex phenomenon characterized by a violent ejection of rock fragments from the free face of deep underground mines. Due to the sudden, disruptive, and complex nature of these events, accurate predictions of rockbursts are difficult. Therefore, geotechnical intervention is imperative to prevent the occurrence of a rockburst. The scenarios of microwave destressing is introduced here as an application method to potentially prevent their occurrence. To understand the influences of microwave destressing, such as microwave exposure duration, spatial layout, and geometric parameters of the microwave preconditioned zone (MPZ), on the occurrence of a rockburst, numerical simulation was conducted based on an impact-induced rockburst model. The feasibility of microwave destressing technology was validated numerically. This paper also provides guidance for the utilization of microwave destressing in practice. Discontinuous MPZ is suitable for a known blasting source with a fixed position, and continuous MPZ can be applied for a working condition with multiple blasting sources with variable positions. A closer distance of MPZ from the free face results in a better microwave destressing effect. However, the closer distance of MPZ from the free face also introduces more negative influences on the static stability of surrounding rock.
The Contribution of 2D and 3D Geometric Morphometrics to Lithic Taxonomies: Testing Discrete Categories of Backed Flakes from Recurrent Centripetal Core Reduction
Authors: Bustos-Pérez Guillermo , Gravina Brad , Brenet Michel , Romagnoli Francesca 
Published: February 2024

Abstract
Paleolithic lithic assemblages are usually dominated by flakes and display a high degree of morphological variability. When analyzing Paleolithic lithic assemblages, it is common to classify flakes into categories based on their morphological and technological features, which are linked to the position of the flake in the reduction sequence and how removals are organized in a given production method. For the analysis of Middle Paleolithic lithic assemblages, two categories of flakes are commonly identified: core–edge flakes and pseudo-Levallois points. A third type, core–edge flakes with a limited back, is also commonly found in the archaeological literature, providing an alternative category whose definition does not match the two previous types but shares many of their morphological and technological features. The present study addresses whether these three flakes constitute discrete categories based on their morphological and technological attributes. 2D and 3D geometric morphometrics are employed on an experimental set composed of the three categories of flakes to quantify morphological variation. Machine learning models and principal components biplots are used to test the discreteness of the categories. The results indicate that geometric morphometrics succeed in capturing the morphological and technological features that characterize each type of product. Pseudo-Levallois points have the highest discreteness of the three technological products, and while some degree of mixture exists between core edge flakes and core edge flakes with a limited back, they are also highly distinguishable. We conclude that the three categories are discrete and can be employed in technological lists of products for the analysis of lithic assemblages and that geometric morphometrics is useful for testing for the validity of categories. When testing these technological categories, we stress the need for well-defined and shared lithic analytical units to correctly identify and interpret the technical steps and decisions made by prehistoric knappers and to properly compare similarities and differences between stone tool assemblages. These are key aspects for current research in which open datasets are becoming more and more common and used to build interpretative techno-cultural models on large geographical scales. Now more than ever, lithic specialists are aware of the need to overcome differences in taxonomies between different school traditions.
‘Do not parade your ignorance’: Negation as a power tool of toxic geek masculinity
Authors: Poucke Margo Van 
Published: February 2024

AbstractCatering to a primarily male user population, Reddit is often said to be a breeding ground for toxic language use, which has led to the development of multiple computational classification models for the automated identification of toxicity in online conversations. Since negation can play a key role in cyberbullying, functioning as a popular stance marker in the dialogical exchange of dominating views in the digital sphere, it should not be ignored. Likewise, its use as a rhetorical strategy deserves more linguistic attention. Described as Engagement resources of disclaim in Appraisal theory, negated constructions may be employed by Reddit users to disalign themselves from divergent perspectives through emotion-driven ad hominem attacks, not only resulting in a potentially detrimental impact on the users’ mental health, but also perpetuating toxic power relationships. Therefore, this paper examines the use of negation, in combination with various other interpersonal resources, within the Redditors’ dialogical interactions, to explore its possible motivations and role in shaping the online discourse. A computer-assisted appraisal analysis was conducted on 2637 most upvoted comments and replies (49,866 words), extracted from the subreddit of r/AustralianPolitics between 11–14 April and 7–10 May 2022, during the period leading up to the so-called federal climate change election in Australia. The study shows evidence of a seemingly dominant negation pattern characterised by negative judgement and its findings tentatively suggest that some of the male Australian users may use negation as a discursive strategy driven by ideology and emotion. This raises the possibility that the language use encountered on r/AustralianPolitics may be influenced by covert toxic geek masculinity.
A globalization diversity ideology
Authors: Diamond Aurel H. 
Published: February 2024

AbstractCurrent reviews of diversity ideologies compare the efficacy of multiculturalism, colorblindness, and polyculturalism in facilitating positive intergroup contact. This paper considers the co-production between globalization and diversity in order to propose a globalization diversity ideology that would add a fourth dimension to the existing multiculturalism-colorblindness-polyculturalism paradigm. This paper explores the concept of a globalization diversity ideology in two steps. First, by considering diversity in the context of globalization and global spaces, this paper defines a globalization diversity ideology that highlights belonging to a mutual global and international space, while recognizing the asymmetric interactions between groups. Second, and in order to illustrate the potential of a globalization diversity ideology, the paper reviews empirical studies that indicate how it may reduce the impact of discrimination and racism, and facilitate positive intergroup contact. Example empirical studies focus on globalization diversity in management and STEM contexts. The studies demonstrate how in some cases, globalization diversity can reduce the salience of the local or national context, thus providing ethnic and racial minorities with a path for negotiating hostile intergroup relations. These studies indicate how a globalization ideology for diversity may differ from colourblindness, multiculturalism, and polyculturalism ideologies. The paper recommends the development of an empirical instrument for measuring and implementing a globalization diversity ideology. The successful development of a globalization ideology would facilitate a four-way approach to diversity ideologies and models that would expand on the existing multiculturalism-colorblindness-polyculturalism paradigm.
Resource-Efficient Gigawatt Water Electrolysis in Germany—A Circular Economy Potential Analysis
Authors: Matz Levin , Bensmann Boris , Hanke-Rauschenbach Richard , Minke Christine 
Published: February 2024

AbstractGreen hydrogen will play a key role in the future energy system. For the production of green hydrogen, an installation of alkaline (AWE) and proton exchange membrane water electrolysis (PEMWE) of several gigawatts per year is projected in the upcoming decades. The development of the hydrogen economy is associated with a great demand for scarce and expensive resources. To reduce resource demand and avoid supply bottlenecks, actions toward a circular economy are required. In the present study, three circular economy actions (repair, reuse, and recycling) are analyzed with regard to AWE and PEMWE installation taking Germany as an example. It is found that, so far, only recycling is a viable strategy for a circular economy. For further analysis, a model is developed to assess the impact of recycling on resource demand for AWE and PEMWE scale-up. Mass flows from end-of-life recycling are intergrated into the model, and their economic value is estimated. The results imply that closed-loop recycling can reduce the cumulated primary resource demand by up to 50% in the long run. However, recycling will first be relevant after 2040, while water electrolysis capacities installed before still depend on primary materials. The outlook on the economic value of the recycling materials indicates a volume of up to 2.15 B € per decade for PEMWE and 0.98 B € per decade for AWE recycling. To realize the potential, a recycling industry specialized for those technolgies considering the whole value chain covering dismantling, collection, and recycling must be introduced.
Urbanization and Benefit of Integration Circular Economy into Waste Management in Indonesia: A Review
Authors: Wikurendra Edza Aria , Csonka Arnold , Nagy Imre , Nurika Globila 
Published: February 2024

AbstractUrbanization is a global problem but is more pronounced in developing countries. Population growth in developing countries is in line with population movement from rural to urban areas due to easy access to jobs, welfare, and the economy. Indirectly, urbanization will burden urban areas in various vital sectors and contribute directly to waste generation. Unscientific waste handling causes health hazards and urban environmental degradation. Solid Waste Management is a formidable task in Indonesia that will become more complicated with increasing urbanization, changing lifestyles, and increasing consumerism. Several current obstacles related to waste management have made the situation even worse. Current inappropriate waste disposal practices have created severe environmental and public health problems. The purpose of this paper is to critically review the impact of urbanization on waste generation, what is currently being done, and the benefit of integrating a circular economy into waste management to address the waste problem in Indonesia. This review provides an overview of urbanization trends, the projected increase in waste due to urbanization, solid waste status, and current waste management in Indonesia. An integration circular economy approach provides an overview of the benefits of implementing this approach in five crucial sectors in Indonesia. The circular economy approach is expected to be one of the future solutions to the problem of waste management in Indonesia.
Analysis of ICESat‐2 Data Acquisition Algorithm Parameter Enhancements to Improve Worldwide Bathymetric Coverage
Authors: Dietrich James T. , Rackley Reese Ann , Gibbons Aimée , Magruder Lori A. , Parrish Christopher E. 
Published: February 2024

AbstractA major advance in global bathymetric observation occurred in 2018 with the launch of NASA’s ICESat‐2 satellite, carrying a green‐wavelength, photon‐counting lidar, the Advanced Topographic Laser Altimeter System (ATLAS). Although bathymetric measurement was not initially a design goal for the mission, pre‐ and post‐launch studies revealed ATLAS’s notable bathymetric mapping capability. ICESat‐2 bathymetry has been used to support a wide range of coastal and nearshore science objectives. However, analysis of ICESat‐2 bathymetry in numerous locations around the world revealed instances of missing or clipped bathymetry in areas where bathymetric measurement should be feasible. These missing data were due to the ATLAS receiver algorithms not being optimized for bathymetry capture. To address this, two updates have been made to ICESat‐2’s receiver algorithm parameters with the goal of increasing the area for which ICESat‐2 can provide bathymetry. This paper details the parameter changes and presents the results of a two‐phased study designed to investigate ICESat‐2’s bathymetry enhancements at both local and global scales. The results of both phases confirm that the new parameters achieved the intended goal of increasing the amount of bathymetry provided by ICESat‐2. The site‐specific phase demonstrates the ability to fill critical bathymetric data gaps in open ocean and coastal settings. The global analysis shows that the area of potential bathymetry approximately doubled, with 6.1 million km2 of new area in which bathymetric measurements may be feasible. These enhancements are anticipated to facilitate a range of science objectives and close the gap between ICESat‐2 bathymetry and offshore sonar data.
National‐Scale Rainfall‐Triggered Landslide Susceptibility and Exposure in Nepal
Authors: Kincey M. E. , Rosser N. J. , Swirad Z. M. , Robinson T. R. , Shrestha R. , Pujara D. S. , Basyal G. K. , Densmore A. L. , Arrell K. , Oven K. J. , Dunant A. 
Published: February 2024

AbstractNepal is one of the most landslide‐prone countries in the world, with year‐on‐year impacts resulting in loss of life and imposing a chronic impediment to sustainable livelihoods. Living with landslides is a daily reality for an increasing number of people, so establishing the nature of landslide hazard and risk is essential. Here we develop a model of landslide susceptibility for Nepal and use this to generate a nationwide geographical profile of exposure to rainfall‐triggered landslides. We model landslide susceptibility using a fuzzy overlay approach based on freely‐available topographic data, trained on an inventory of mapped landslides, and combine this with high resolution population and building data to describe the spatial distribution of exposure to landslides. We find that whilst landslide susceptibility is highest in the High Himalaya, exposure is highest within the Middle Hills, but this is highly spatially variable and skewed to on average relatively low values. Around 4 × 106 Nepalis (∼15% of the population) live in areas considered to be at moderate or higher degree of exposure to landsliding (>0.25 of the maximum), and critically this number is highly sensitive to even small variations in landslide susceptibility. Our results show a complex relationship between landslides and buildings, that implies wider complexity in the association between physical exposure to landslides and poverty. This analysis for the first time brings into focus the geography of the landslide exposure and risk case load in Nepal, and demonstrates limitations of assessing future risk based on limited records of previous events.
Improving the Accessibility and Efficiency of Proton Irradiations for 4He/3He Thermochronology
Authors: Colleps C. L. , van der Beek P. A. , Amalberti J. , Denker A. , Tremblay M. M. , Bernard M. , Dittwald A. H. , Bundesmann J. 
Published: February 2024

AbstractSynthesizing uniform and high concentrations of 3He within minerals via high‐energy proton irradiation is paramount for 4He/3He thermochronology and helium diffusion kinetic studies. Proton irradiations of geological material have hitherto exclusively been routinely conducted at the Francis H. Burr Proton Therapy Center (FHB); we thus explored alternative irradiation protocols at two European‐based facilities with the intention to improve the accessibility and efficiency in obtaining 4He/3He data. We conducted a single irradiation at the Paul Scherrer Institute (PSI) using an approach most similar to that used at FHB (wide, high‐energy beam), and four irradiations at the Helmholtz Zentrum Berlin (HZB) using a newly developed in‐vacuum irradiation protocol in a narrow, lower‐energy but high‐intensity beam. Internal shards of Durango apatite were irradiated in all experiments; 4He/3He release spectra and bulk 3He concentrations of PSI and HZB‐irradiated Durango shards were compared to those from FHB to assess the quality of each experiment in terms of the quantity and uniformity of synthesized 3He. While 3He was uniformly synthesized in PSI‐irradiated Durango shards, the bulk 3He concentration was below the required threshold due to limitations on the maximum allotted proton flux. Over the course of four irradiation experiments at HZB, the protocol evolved to ensure that uniform and high concentrations of 3He can be consistently induced. Furthermore, we demonstrate how HZB irradiations can be replicated using computer simulations, permitting the use of simulations to inform future modifications of the irradiation protocol in order to optimize the uniformity of the 3He distribution across all irradiated samples.
Carbon Storage in the Forearc Produced by Buoyant Diapirs of Subducted Sediment
Authors: Wang Xinxin , Zhao Liang , Yang Jianfeng , Guo Zhengtang 
Published: February 2024

AbstractCarbonate sediments transported into the mantle at subduction zone settings account for the majority of the carbon flux into the Earth's interior and are thus critical to the deep carbon cycle. Understanding carbon storage volumes in the deep earth requires knowledge of the degree to which carbonate sediments are stored in the arc lithosphere or descend to the deep mantle. Here, we use petrological‐thermomechanical modeling to indicate that solid‐state diapirs dominate the removal of carbon from subducting plates, which may be the principal carbon‐release mechanism for the Cyclades (Greece) and Costa Rican forearcs. We find that forearc diapirs remove up to ∼80% of subducting carbon and develop diagonally upward, resulting in massive carbon storage in the subarc lithosphere. Outgassing from the carbon storage may cause high carbon outputs and explain volcanic gas with high δ13C at some subduction zones, affecting atmospheric CO2 concentration.
Nepheloid Layer Structure and Variability Along the Highly Energetic Continental Margin of the Northern South China Sea
Authors: Chen Tian , Liu Xiaolei , Bian Changwei , Zhang Shaotong , Ji Chunsheng , Wu Zhaosen , Jia Yonggang 
Published: February 2024

AbstractObservations of hydrography and suspended particles supply a large amount of information regarding material transport with respect to the changing marginal sea. To investigate the nepheloid layer structure and variability along the highly energetic continental margin of the northern South China Sea, we combined optical data and time series of acoustic backscatter data. The surface nepheloid layers and subsurface nepheloid layers were widely developed, but the bottom nepheloid layers (BNLs) and intermediate nepheloid layers (INLs) showed regional differences. On the western side of Dongsha Island, there was a large variability of strong INLs, with concentrations up to 0.94 mg L−1, and they occasionally formed and exceeded 200 m in a few hours, with concentration changes up to an order of magnitude. On the eastern side, INLs thicker than 100 m were rare. However, the BNL was larger and more stable, and the strongest BNLs with nepheloid inversion had concentrations up to 0.55 mg L−1 and unexpectedly thickened to be greater than 1,500 m, extending upward to the thermocline. Time series data found that the recurring nonlinear internal waves (NLIWs) dominated the enhancement of BNLs in the Dongsha Slope. The NLIW‐induced vertical velocity reached 0.5 m s−1, increasing the concentration of BNLs and resuspending sediment to 10 m above the bottom. The NLIWs strongly erode the sediments and provide a material source for the upward development of BNLs, while centimeter‐scale rippled scours form on the seafloor. These findings provide evidence of strong lateral transport across continental margins.
Constraining Formation Hypotheses for Irregular Mare Patches on the Moon With Orbital Reflectance Spectra
Authors: Vannier Hunter , Horgan Briony , Stopar Julie D. , Henderson Marie 
Published: February 2024

AbstractIrregular mare patches (IMPs) are enigmatic volcanic features on the Moon's surface, whose lack of cratering and crisp appearance imply they formed <100 Ma ago, ∼1 Ga after the expected turnoff of lunar volcanism. Multiple contrasting formation hypotheses have been put forth to explain their young appearance, including recent emplacement via eruptions of juvenile volcanic material or outgassing, versus ancient volcanic deposits that were emplaced billions of years ago but only appeared young due to highly porous material. If IMPs formed recently, this would require a reinterpretation of lunar thermal evolution. To help constrain formation hypotheses, we provide a comprehensive mineralogical analysis of IMPs using visible to near infrared hyperspectral data from the Moon Mineralogy Mapper. IMPs appear spectrally dominated by high‐calcium pyroxene and are spectrally similar to their host mare and fresh craters. IMPs do not show clear indications of significant glass, implying that pyroclastic eruption was not significant in IMP formation. Based on spectral comparisons to terrestrial magma foam, we find that this also contradicts the glassiness expected for a magma foam exposed at the surface. Thus, we find it is unlikely that IMPs are composed of recently erupted material and may instead be the result of recent or ongoing surface modification of materials similar in composition and likely contemporaneously emplaced with the mare. We favor previous hypotheses that collapse processes or drainage into subsurface voids or porous materials may have been the major drivers of IMP surface rejuvenation, supported by their proximity to collapse features.
Improving Thermospheric Density Predictions in Low‐Earth Orbit With Machine Learning
Authors: Acciarini Giacomo , Brown Edward , Berger Tom , Guhathakurta Madhulika , Parr James , Bridges Christopher , Baydin Atılım Güneş 
Published: February 2024

AbstractThermospheric density is one of the main sources of uncertainty in the estimation of satellites' position and velocity in low‐Earth orbit. This has negative consequences in several space domains, including space traffic management, collision avoidance, re‐entry predictions, orbital lifetime analysis, and space object cataloging. In this paper, we investigate the prediction accuracy of empirical density models (e.g., NRLMSISE‐00 and JB‐08) against black‐box machine learning (ML) models trained on precise orbit determination‐derived thermospheric density data (from CHAMP, GOCE, GRACE, SWARM‐A/B satellites). We show that by using the same inputs, the ML models we designed are capable of consistently improving the predictions with respect to state‐of‐the‐art empirical models by reducing the mean absolute percentage error (MAPE) in the thermospheric density estimation from the range of 40%–60% to approximately 20%. As a result of this work, we introduce Karman: an open‐source Python software package developed during this study. Karman provides functionalities to ingest and preprocess thermospheric density, solar irradiance, and geomagnetic input data for ML readiness. Additionally, it facilitates developing and training ML models on the aforementioned data and benchmarking their performance at different altitudes, geographic locations, times, and solar activity conditions. Through this contribution, we offer the scientific community a comprehensive tool for comparing and enhancing thermospheric density models using ML techniques.