bluuebunny/crossref_metadata_2025_split huggingface dataset:
Revitalizing Ethiopia’s highland soil degradation: a comprehensive review on land degradation and effective management interventions
Authors: Solomon Negasi , Birhane Emiru , Tilahun Mesfin , Schauer Mark , Gebremedhin Mewcha Amha , Gebremariam Filmon Tquabo , Gidey Tesfay , Newete Solomon W. 
Published: June 2024

AbstractLand degradation is one of the major challenges causing food insecurity and instability in Ethiopia. A comprehensive study on trends and drivers of land degradation and, socioeconomic and ecological impact of land degradation is necessary for an effective and sustainable mitigation measures. This study reviewed the drivers, trends and impacts of land degradation, existing sustainable land management (SLM) practices, and policies for land use and resources management. We employed the keyword research acquisition approach to review 122 scientific papers, reports, and other documents. The scientific literatures in the study were accessed through as the Web of Science, Scopus, and Google Scholar search engines, while reports and other additional materials were sourced from a variety of repositories and governmental offices. There has been a substantial increase in soil erosion since the 1980s in the highlands of Ethiopia. Illegal logging, poor land management system, overgrazing of pasturelands, population growth, insecure land tenure, war and conflict, poverty, ineffective government policies and programs, institutional issues, poor rural markets, and low agricultural inputs remained the major drivers for land degradation in Ethiopia causing huge loss of agricultural production and environmental unsustainability. Biological and physical soil and water conservation measures, exclosure establishment, afforestation, and reforestation programs are the most common intervention measures of preventing and restoring degraded lands. SLM practices such as intercropping systems, composting, crop rotation, zero grazing, minimum tillage, agroforestry and rotational grazing has been implemented across the country. However, land security and the absence of clearly defined property rights are the major factors that influence farmers’ decisions for a long-term investment on land resources. Thus the SLM practices and various restoration interventions remain a critical requirement to address the growing concerns of land degradation in Ethiopia.
State-of-the-art thermocatalytic systems for CH4 and CO production via CO2 hydrogenation: critical comparison, mechanistic considerations and structure-performance insights
Authors: Lykaki Maria , Mandela Evridiki , Varvoutis Georgios , Lampropoulos Athanasios , Marnellos George E. , Konsolakis Michalis 
Published: June 2024

AbstractThe unprecedented increase of atmospheric CO2 concentration and the associated climate change calls for the urgent implementation of CO2 mitigation approaches. Among the various proposed measures, CO2 capture from several industrial point sources or directly from air and its subsequent hydrogenation via renewable H2 towards value-added products formation has gained particular attention. Specifically, the production of CO or CH4 is of great importance for the eventual generation of liquid fuels or synthetic natural gas, respectively. Herein, an overview of the state-of-the-art noble and non-noble metal-based catalysts employed for the thermocatalytic CO2 hydrogenation towards CO (reverse water–gas shift reaction, rWGS) or CH4 (Sabatier reaction) is elaborated. A brief description of fundamental considerations is initially provided for each reaction, involving thermodynamic, mechanistic and kinetics considerations. Then, the recent catalytic studies on rWGS and Sabatier reactions over both noble metal and non-noble metal catalysts (e.g., metal oxides, carbides, metal organic frameworks) are discussed from the perspective of structure–property relationships. Lastly, the most important conclusions arising from the comparative analysis of the most promising catalysts are summarized and are complemented with proposed outlooks associated with future directions towards the rational design of highly active and selective catalytic materials for each process.
Enhancing knowledge construction in emerging technologies: the role of imagination training in immersive virtual reality environments
Authors: Pflieger Laura Claudia Johanna , Hartmann Christian , Bannert Maria 
Published: June 2024

AbstractIn the rapidly evolving landscape of educational technologies, Immersive Virtual Reality (iVR) stands out as a transformative tool for teaching and learning. The learner must actively engage, particularly when visual and auditory knowledge information is presented simultaneously. Generative learning strategies support learners in processing and integrating the information provided effectively and help them select, organize, and integrate information into a coherent mental model. Yet, learners often do not use such strategies spontaneously, so pre-training of the learning strategy is recommendable. IVR provides a spatial context for learning, where an essential strategy for promoting learning is to integrate auditory knowledge information into visually perceived space. We hypothesize that this can be done effectively through imagination, i.e., learners mentally visualize auditory information. This study investigated an imaginative pre-training strategy that targets integrating visual-spatial and auditory knowledge information. In a pre-post between-subjects design, we tested the effects of imaginative strategy pre-training. Students received either a pre-training (EG = 30) or no training (CG = 30) before exploring an iVR learning environment. Against our expectations, the EG did not outperform the CG on semantic and spatial knowledge. These findings may be explained by the demands on learners to process sensory input, and focus directed attention in a spatial iVR environment, suggesting that imagination strategies need to be anchored and complemented by other selection and organization strategies. This study contributes to a critical understanding of the possibilities and limitations of iVR in education, shedding light on the learners' processes and needs.
Analysis of the Stress Field Around Concealed Active Fault From Minor Faults‐Slip Data Collected by Geological Survey: An Example in the 1984 Western Nagano Earthquake Region
Authors: Nishiyama N. , Nakajima T. , Goto A. , Hakoiwa H. , Nagata M. , Shimada K. , Niwa M. 
Published: June 2024

AbstractEarthquakes with magnitudes of 6–7 have been reported even in various active tectonic settings where fault deformation topography have not been detected. Therefore, delineating concealed active faults generating such earthquakes is necessary to reduce earthquake damage; however, few studies exist to provide its clues regarding such faults. The 1984 Western Nagano Earthquake in Japan was a main shock with a magnitude of Mj 6.8 and a depth of 2 km at the source. Solid bedrocks are well‐exposed in the earthquake source region; however, no surface rupture have been identified, and the active fault is known to be concealed. In this study, we collected data on striations observed in fractures by geological survey around the source area of the 1984 Western Nagano Earthquake. Using the collected data, the multiple inverse method was used to estimate the stresses that affected the striation formation. Consequently, stresses similar to acting faults in this area were detected in minor faults around the known concealed active fault. This suggests that the minor faults might be part of the damage zone that has been developed around the concealed active fault. Some minor faults were recognized in Quaternary volcanic rocks, confirming that they experienced displacements recently. This study indicates the possibility of detecting concealed active faults in the bedrock by geological survey.
The Significance of Interseismic Vertical Land Movement at Convergent Plate Boundaries in Probabilistic Sea‐Level Projections for AR6 Scenarios: The New Zealand Case
Authors: Naish T. , Levy R. , Hamling I. , Hreinsdóttir S. , Kumar P. , Garner G. G. , Kopp R. E. , Golledge N. , Bell R. , Paulik R. , Lawrence J. , Denys P. , Gillies T. , Bengtson S. , Howell A. , Clark K. , King D. , Litchfield N. , Newnham R. 
Published: June 2024

AbstractAnticipating and managing the impacts of sea‐level rise for nations astride active tectonic margins requires understanding of rates of sea surface elevation change in relation to coastal land elevation. Vertical land motion (VLM) can either exacerbate or reduce sea‐level changes with impacts varying significantly along a coastline. Determining rate, pattern, and variability of VLM near coasts leads to a direct improvement of location‐specific relative sea level (RSL) estimates for coastal hazard risk assessment. Here, we utilize vertical velocity field from interferometric synthetic aperture radar (InSAR) data, calibrated with campaign and continuous Global Navigation Satellite System data, to determine the VLM for the entire coastline of New Zealand. Guided by available knowledge of the seismic cycle, the VLM data infer secular, interseismic rates of land surface deformation. Using the Framework for Assessing Changes to Sea‐level (FACTS), we build probabilistic RSL projections using the same emissions scenarios employed in IPCC Assessment Report 6 and local VLM data at 8,179 sites, thereby enhancing spatial coverage that was previously limited to four tide gauges. We present ensembles of probability distributions of RSL for each scenario to 2150, and for low confidence sea‐level processes to 2300. Where land subsidence is occurring at rates >2 mm/y VLM makes a significant contribution to RSL projections for all scenarios out to 2150. Our approach can be applied to similar locations across the world and has significant implications for adaptation planning, as timing of threshold exceedance for coastal inundation can be brought forward (or delayed) by decades.
The Timing of Detectable Increases in Seasonal Soil Moisture Droughts Under Future Climate Change
Authors: Chen Sisi , Yuan Xing 
Published: June 2024

AbstractGlobal warming exacerbates the increase of soil moisture drought by accelerating the water cycle, posing potential threats to food security and ecological sustainability. The design of drought prevention and mitigation policies should be based on the reliable detection of the future change signal in droughts, so it is critical to know when the signal can be detected (Time of Emergence, ToE) in the background noise of the climate system. While the ToE framework has been successfully applied for temperature‐related signal detection, the ToE for changes in drought has not been well studied. Based on 66 Coupled Model Intercomparison Project Phase 6 model ensemble members under four Shared Socio‐economic Pathways, we conduct a global ToE analysis of seasonal soil moisture drought characteristics and discuss the impact of different warming levels. Six subregions with robust increase in soil moisture droughts are identified. For drought frequency, most of the subregion's ToE is centered around 2080, however for drought intensity it is much earlier and can even reach around 2040 in AMZ. For drought frequency and drought intensity, approximately 14%–22% and 47%–49% of global land areas would reach ToE in 21st century. The global land areas with ToE of increasing droughts would increase by at least 1/5 when global warming level is kept to 2°C rather than 1.5°C above pre‐industrial conditions. This suggests that limiting global warming can significantly delay the emergence time of increases in seasonal soil moisture droughts, allowing additional adaptation time for the drought‐related sectors.
Simulation of Nighttime Medium‐Scale Traveling Ionospheric Disturbances in the Midlatitude Ionosphere During Stormtime
Authors: Wang Xiaochuan , Lei Jiuhou , Zhang Shun‐Rong , Li Zezhong , Dang Tong , Luan Xiaoli , Dou Xiankang 
Published: June 2024

AbstractThe generation of medium‐scale traveling ionospheric disturbances (MSTIDs) in the mid‐latitude F region ionosphere, particularly in the presence of sporadic E (Es) layers or geomagnetically conjugate features, has been the focus of extensive investigation using both observational and numerical modeling approaches. Recent observations have revealed the occurrence of nighttime MSTIDs over the continental US during storm conditions even without invoking the Es instability. While this phenomenon is considered to be electrified and likely associated with the Perkins instability, the influences of storm‐enhanced density (SED), electric fields, and winds on the excitation of nighttime MSTIDs remain a complicated issue and require further quantitative analysis. In this study, we develop a two‐dimensional numerical model of the nighttime ionospheric electrodynamics at midlatitudes using the ionospheric ion continuity equation and the electric field Poisson equation to investigate the characteristics of MSTIDs in the SED base region during storm conditions. We demonstrate that the magnetic inclination effect can explain the lower latitude preference of the MSTIDs during magnetic storms, while the development of MSTIDs is primarily influenced by intense storm electric fields under the background ionospheric condition of large density gradients associated with SED. However, the impact of neutral winds on the MSTIDs growth varies, depending on their specific direction determined by the strongly dynamic spatiotemporal variation of the thermosphere and ionosphere during storms. Therefore, the MSTIDs stormtime scenario results from a combination of multiple important factors.
Interactions of Remotely Generated Internal Tides With the U.S. West Coast Continental Margin
Authors: Siyanbola Oladeji Q. , Buijsman Maarten C. , Delpech Audrey , Barkan Roy , Pan Yulin , Arbic Brian K. 
Published: June 2024

AbstractThrough interactions with the continental margins, incident low‐mode internal tides (ITs) can be reflected, scattered to high modes, transmitted onto the shelf and dissipated. We investigate the fate of remotely generated mode‐1 ITs in the U.S. West Coast (USWC) continental margin using two 4‐km horizontal resolution regional simulations. These 1‐year long simulations have realistic stratification, and atmospheric, tidal, and sub‐tidal forcings. In addition, one of these simulations has remote internal wave (IW) forcing at the open boundaries while the other does not. To compute the IT reflectivity of the USWC margin, we separate the IT energy fluxes into onshore and offshore propagating components using a Discrete Fourier Transform in space and time. Overall, ∼20% of the remote mode‐1 semidiurnal IT energy fluxes reflect off the USWC margin, 40% is scattered to modes 2–5, and 7% is transmitted onto the shelf while the remaining is dissipated on the continental slope. Furthermore, our results reveal that differences in stratification, slope criticality, topographic roughness and angle of incidence cause these fractions to vary spatially and temporally along the USWC margin. However, there is no clear seasonal variability in these estimates. Remote IWs enhance the advection and diffusion of heat in the continental margin, resulting in cooling at the surface and warming at depth, and a reduction in the thermocline stratification. These results suggest that low‐mode ITs can cause water mass transformation in continental margins that are far away from their generation sites.
Associations between obesity, a composite risk score for probable long COVID, and sleep problems in SARS-CoV-2 vaccinated individuals
Authors: Xue Pei , Merikanto Ilona , Delale Eva A. , Bjelajac Adrijana , Yordanova Juliana , Chan Rachel N. Y. , Korman Maria , Mota-Rolim Sérgio A. , Landtblom Anne-Marie , Matsui Kentaro , Reis Catia , Penzel Thomas , Inoue Yuichi , Nadorff Michael R. , Holzinger Brigitte , Morin Charles M. , Espie Colin A. , Plazzi Giuseppe , De Gennaro Luigi , Chung Frances , Bjorvatn Bjørn , Wing Yun Kwok , Dauvilliers Yves , Partinen Markku , Benedict Christian 
Published: June 2024

Abstract
Background
Preliminary data suggests that obesity might hasten the decline in mRNA vaccine-induced immunity against SARS-CoV-2. However, whether this renders individuals with obesity more susceptible to long COVID symptoms post-vaccination remains uncertain. Given sleep’s critical role in immunity, exploring the associations between obesity, probable long COVID symptoms, and sleep disturbances is essential.

Methods
We analyzed data from a survey of 5919 adults aged 18 to 89, all of whom received two SARS-CoV-2 mRNA vaccinations. Participants were categorized into normal weight, overweight, and obesity groups based on ethnicity-specific BMI cutoffs. The probability of long COVID was evaluated using the Post-Acute Sequelae of SARS-CoV-2 (PASC) score, as our survey did not permit confirmation of acute SARS-CoV-2 infection through methods such as antibody testing. Additionally, sleep patterns were assessed through questionnaires.

Results
Participants with obesity exhibited a significantly higher adjusted odds ratio (OR) of having a PASC score of 12 or higher, indicative of probable long COVID in our study, compared to those with normal weight (OR: 1.55, 95% CI: 1.05, 2.28). No significant difference was observed for overweight individuals (OR: 0.92 [95% CI: 0.63, 1.33]). Both obesity and probable long COVID were associated with increased odds of experiencing a heightened sleep burden, such as the presence of obstructive sleep apnea or insomnia (P < 0.001). However, no significant interaction between BMI and probable long COVID status was found.

Conclusions
Even post-vaccination, individuals with obesity may encounter a heightened risk of experiencing prolonged COVID-19 symptoms. However, confirming our observations necessitates comprehensive studies incorporating rigorous COVID infection testing, such as antibody assays - unavailable in our anonymous survey. Additionally, it is noteworthy that the correlation between probable long COVID and sleep disturbances appears to be independent of BMI.
Advances in large viewing angle and achromatic 3D holography
Authors: Huang Jiaming , Chen Yu , Li Guixin 
Published: June 2024

AbstractOptical holography is a promising technique to achieve a naked-eye 3D display. However, the narrow viewing angle and chromatic aberration are the two key issues that usually limit the holographic display performance. A recent work proposes a novel way to circumvent these constraints by introducing a color liquid crystal grating into a time-sequenced holography system.
Single-crystalline hole-transporting layers for efficient and stable organic light-emitting devices
Authors: Ye Gao-Da , Ding Ran , Li Su-Heng , Ni Lei , Dai Shu-Ting , Chen Nian-Ke , Liu Yue-Feng , Guo Runda , Wang Lei , Li Xian-Bin , Xu Bin , Feng Jing 
Published: June 2024

AbstractEfficient charge-carrier injection and transport in organic light-emitting devices (OLEDs) are essential to simultaneously achieving their high efficiency and long-term stability. However, the charge-transporting layers (CTLs) deposited by various vapor or solution processes are usually in amorphous forms, and their low charge-carrier mobilities, defect-induced high trap densities and inhomogeneous thickness with rough surface morphologies have been obstacles towards high-performance devices. Here, organic single-crystalline (SC) films were employed as the hole-transporting layers (HTLs) instead of the conventional amorphous films to fabricate highly efficient and stable OLEDs. The high-mobility and ultrasmooth morphology of the SC-HTLs facilitate superior interfacial characteristics of both HTL/electrode and HTL/emissive layer interfaces, resulting in a high Haacke’s figure of merit (FoM) of the ultrathin top electrode and low series-resistance joule-heat loss ratio of the SC-OLEDs. Moreover, the thick and compact SC-HTL can function as a barrier layer against moisture and oxygen permeation. As a result, the SC-OLEDs show much improved efficiency and stability compared to the OLEDs based on amorphous or polycrystalline HTLs, suggesting a new strategy to developing advanced OLEDs with high efficiency and high stability.
Unique model of chronic hypoxia in fetal lambs demonstrates abnormal contrast-enhanced ultrasound brain perfusion
Authors: Agarwal Divyansh , Hunt Mallory L. , Sridharan Anush , Larson Abby C. , Rychik Jack , Licht Daniel J. , Davey Marcus G. , Flake Alan W. , Gaynor J. William , Didier Ryne A. 
Published: June 2024

Abstract

Background
Children with congenital heart disease (CHD) demonstrate long-term neurodevelopmental impairments. We investigated contrast-enhanced ultrasound (CEUS) cerebral perfusion in a fetal animal model exposed to sub-physiologic oxygen at equivalent levels observed in human fetuses with CHD.

Methods
Fifteen fetal lambs [hypoxic animals (n = 9) and normoxic controls (n = 6)] maintained in an extrauterine environment underwent periodic brain CEUS. Perfusion parameters including microvascular flow velocity (MFV), transit time, and microvascular blood flow (MBF) were extrapolated from a standardized plane; regions of interest (ROI) included whole brain, central/thalami, and peripheral parenchymal analyses. Daily echocardiographic parameters and middle cerebral artery (MCA) pulsatility indices (PIs) were obtained.

Results
Hypoxic lambs demonstrated decreased MFV, increased transit time, and decreased MBF (p = 0.026, p = 0.016, and p < 0.001, respectively) by whole brain analyses. MFV and transit time were relatively preserved in the central/thalami (p = 0.11, p = 0.08, p = 0.012, respectively) with differences in the peripheral parenchyma (all p < 0.001). In general, cardiac variables did not correlate with cerebral CEUS perfusion parameters. Hypoxic animals demonstrated decreased MCA PI compared to controls (0.65 vs. 0.78, respectively; p = 0.027).

Conclusion
Aberrations in CEUS perfusion parameters suggest that in environments of prolonged hypoxia, there are regional microvascular differences incompletely characterized by MCA interrogation offering insights into fetal conditions which may contribute to patient outcomes.

Impact

This work utilizes CEUS to study cerebral microvascular perfusion in a unique fetal animal model subjected to chronic hypoxic conditions equal to fetuses with congenital heart disease. CEUS demonstrates altered parameters with regional differences that are incompletely characterized by MCA Doppler values.

These findings show that routine MCA Doppler interrogation may be inadequate in assessing microvascular perfusion differences.

To our knowledge, this study is the first to utilize CEUS to assess microvascular perfusion in this model.

The results offer insight into underlying conditions and physiological changes which may contribute to known neurodevelopmental impairments in those with congenital heart disease.