bluuebunny/crossref_metadata_2025_split huggingface dataset:
A method for the taphonomic assessment of bone tools using 3D surface texture analysis of bone microtopography
Authors: Martisius Naomi L. , McPherron Shannon P. , Schulz-Kornas Ellen , Soressi Marie , Steele Teresa E. 
Published: October 2020

AbstractIncreasingly researchers have employed confocal microscopy and 3D surface texture analysis to assess bone surface modifications in an effort to understand ancient behavior. However, quantitative comparisons between the surfaces of purported archaeological bone tools and experimentally manufactured and used bones are complicated by taphonomic processes affecting ancient bone. Nonetheless, it may be reasonable to assume that bones within the same deposits are altered similarly and thus these alterations are quantifiable. Here we show how unworked bones can be used to quantify the taphonomic effect on bone surfaces and how this effect can then be controlled for and incorporated into an analysis for evaluating the modified surfaces of purported bone tools. To assess the baseline taphonomy of Middle Paleolithic archaeological deposits associated with typologically identified bone artifacts, specifically lissoirs, we directly compare the surface textures of ancient and modern unworked ribs. We then compare the ancient unworked ribs and lissoirs to assess their differences and predict the ancient artifacts’ original surface state using a multilevel multivariate Bayesian model. Our findings demonstrate that three of five tested surface texture parameters (Sa, Spc, and IsT) are useful for distinguishing surface type. Our model predictions show that lissoirs tend to be less rough, have more rounded surface peaks, and exhibit more directionally oriented surfaces. These characteristics are likely due to anthropogenic modifications and would have been more pronounced at deposition. Quantifying taphonomic alterations moves us one step closer to accurately assessing how bone artifacts were made and used in the ancient past.
COVID-19 and shrinking civic spaces: patterns and consequences
Authors: Bethke Felix S. , Wolff Jonas 
Published: October 2020

AbstractIn response to the COVID-19 pandemic, a majority of countries worldwide have introduced severe limitations on the freedom of assembly, if not an outright lockdown, in many cases complemented by restrictions on further civil and political rights. Although restrictions were generally considered necessary to save lives and protect health care systems from overburdening, they also pose the risk of government overreach, that is, governments may use the pandemic as a convenient opportunity and justification to impose restrictions for political purposes. In this sense, COVID-19 may give yet another substantial boost to a global trend that has been unfolding since the early 2000s: the shrinking of civic spaces, which is characterized by an increase in government restrictions that target civil society actors and limit their freedoms of assembly, association, and expression. The aim of the paper is to assess civic space restrictions that have been imposed in response to the COVID-19 pandemic with a view to exploring their immediate consequences as well as their potential mid-term implications for civil society organizations in general and contentious civic activism in particular. We do so by, first, providing evidence from multiple data sources about the global spread of COVID-19-related restrictions over time and across countries. Second, we identify key dynamics at work in order to assess the immediate consequences and the potential mid-term implications of these restrictions. These dynamics are illustrated by looking at experiences from individual countries (including Cambodia, Germany, Hungary, and Lebanon).
On the Governance of Artificial Intelligence through Ethics Guidelines
Authors: LARSSON Stefan 
Published: October 2020

AbstractThis article uses a socio-legal perspective to analyze the use of ethics guidelines as a governance tool in the development and use of artificial intelligence (AI). This has become a central policy area in several large jurisdictions, including China and Japan, as well as the EU, focused on here. Particular emphasis in this article is placed on the Ethics Guidelines for Trustworthy AI published by the EU Commission’s High-Level Expert Group on Artificial Intelligence in April 2019, as well as the White Paper on AI, published by the EU Commission in February 2020. The guidelines are reflected against partially overlapping and already-existing legislation as well as the ephemeral concept construct surrounding AI as such. The article concludes by pointing to (1) the challenges of a temporal discrepancy between technological and legal change, (2) the need for moving from principle to process in the governance of AI, and (3) the multidisciplinary needs in the study of contemporary applications of data-dependent AI.
COVID-19 and Global Health Security: Overview of the Global Health Security Alliance, COVID-19 Response, African Countries’ Approaches, and Ethics
Authors: Yimer Belete , Ashebir Wassachew , Wolde Awraris , Teshome Muluken 
Published: October 2020

ABSTRACTPublic health emergencies can arise from a wide range of causes, one of which includes outbreaks of contagion. The world has continued to be threatened by various infectious outbreaks of different types that have global consequences. While all pandemics are unique in their level of transmission and breadth of impact, the 2019 coronavirus disease (COVID-19) pandemic is the deepest global crisis of the 21st century, which has affected nearly every country globally. Yet, going forward, there will be a continued need for global health security resources to protect people around the world against increasing infectious disease outbreaks frequency and intensity. Pandemic response policies and processes all need to be trusted for effective and ethical pandemic response. As the world can learn during the past few years about frequent infectious disease outbreaks, (these) diseases respect no borders, and, therefore, our spirit of solidarity must respect no borders in our efforts to stop the ongoing COVID-19 pandemic and be better prepared to respond effectively to a health crisis in the future.
LARGE VALUES OF L-FUNCTIONS ON THE 1-LINE
Authors: DIXIT ANUP B. , MAHATAB KAMALAKSHYA 
Published: October 2020

AbstractWe study lower bounds of a general family of L-functions on the

$1$
-line. More precisely, we show that for any

$F(s)$
in this family, there exist arbitrarily large t such that

$F(1+it)\geq e^{\gamma _F} (\log _2 t + \log _3 t)^m + O(1)$
, where m is the order of the pole of

$F(s)$
at

$s=1$
. This is a generalisation of the result of Aistleitner, Munsch and Mahatab [‘Extreme values of the Riemann zeta function on the

$1$
-line’, Int. Math. Res. Not. IMRN2019(22) (2019), 6924–6932]. As a consequence, we get lower bounds for large values of Dedekind zeta-functions and Rankin-Selberg L-functions of the type

$L(s,f\times f)$
on the

$1$
-line.
A repeated cross-sectional survey assessing university students' stress, depression, anxiety, and suicidality in the early stages of the COVID-19 pandemic in Poland
Authors: Debowska Agata , Horeczy Beata , Boduszek Daniel , Dolinski Dariusz 
Published: October 2020

AbstractBackgroundThe time of widespread outbreaks of infectious diseases can lead to elevated stress and mental health problems among all persons affected, and in particular those sub-groups of the population that are at an increased risk of mental health problems. One such vulnerable group constitutes university students. The aim of this study is to assess stress, depression, anxiety, and suicidality among different groups of university students (medical, psychology, and other).MethodsUsing a repeated cross-sectional study design, we collected survey data among a large sample of 7228 university students from Poland (mean age = 22.78, s.d. = 4.40; 81% female). Data were collected in five waves, during the first 2 months of the COVID-19 pandemic in Europe (March and April 2020).ResultsThe results demonstrate a significant increase in depression levels as the pandemic was progressing. We also found that female students scored significantly higher than male students on depression, anxiety, and stress. Psychology students recorded the lowest scores on depression and anxiety. Young adult students (aged 18–24 years) had more symptoms of depression, anxiety, and suicidality than adult students (⩾25 years).ConclusionsThese results provide insights into stress and mental health among university students during the early stages of the COVID-19 pandemic. Findings can be used for a more effective identification of students who may struggle during next stages of the pandemic and future crises.
Development of an Autonomous Robotics Platform for Road Marks Painting Using Laser Simulator and Sensor Fusion Technique
Authors: Ali Mohammed A. H. , Mailah Musa , Moiduddin Khaja , Ameen Wadea , Alkhalefah Hisham 
Published: October 2020

SUMMARYThe design and experimental works of an autonomous robotic platform for road marks painting are presented in this paper as the first autonomous system of its kind. The whole system involves two main sub-systems, namely: an autonomous mobile robot navigation system which is used for recognizing the roads and estimating the position of road marks, and automatic road marks painting system that is attached to the mobile robot platform to control the spray of the paint on the road’s surface. The experimental results show the capability of the proposed system to perform the task of autonomous road marks painting with accuracy of ±10 cm.
Developing an agency's position with respect to patient involvement in health technology assessment: the importance of the organizational culture
Authors: Cleemput Irina , Dauvrin Marie , Kohn Laurence , Mistiaen Patriek , Christiaens Wendy , Léonard Christian 
Published: October 2020

The Belgian Health Care Knowledge Centre (KCE) formally involves stakeholders in HTA since 2012. Patients are treated as one stakeholder amongst others, but it is recognized that patient involvement (PI) requires a different approach. The success of implementing PI depends, however, on the organizational culture toward PI.ObjectivesThe objective of this study was to map the PI culture at KCE in the context of the development of organization-wide supported position statements about PI.MethodsA nominal group technique was used to measure the PI culture at KCE. Arguments for and against PI and conditions for PI in different phases of the HTA process were collected. A literature review and interviews fed the draft position statements, for which support was assessed by means of a two-round Delphi process.ResultsArguments in favor of PI in HTA related to the relevance of the scope, expertise with data collection, bringing in fresh ideas for study design, access to survey participants, validation of data analyses, adherence to recommendations. Disadvantages and risks included the lack of scientific knowledge of involved patients, resources requirements, conflicts of interest, and heterogeneity within patient populations. Conditions for meaningful PI referred to measures mitigating the identified disadvantages. Eighteen position statements supported by KCE could be formulated.ConclusionThe KCE culture seems predominantly positive toward PI, although attitudes vary between HTA researchers. KCE recognizes the potential value of PI in HTA, but considers the level of involvement to be contingent on the topic and phase in the HTA process.
Reconsidering theignorabimus: du Bois-Reymond and the hard problem of consciousness
Authors: Pecere Paolo 
Published: October 2020

ArgumentIn this paper I present an interpretation of du Bois-Reymond’s thesis on the impossibility of a scientific explanation of consciousness and of its present importance. I reconsider du Bois-Reymond’s speech “On the limits of natural science” (1872) in the context of nineteenth-century German philosophy and neurophysiology, pointing out connections and analogies with contemporary arguments on the “hard problem of consciousness.” Du Bois-Reymond’s position turns out to be grounded on an epistemological argument and characterized by a metaphysical skepticism, motivated by the unfruitful speculative tendency of contemporary German philosophy and natural science. In the final sections, I show how contemporary research can benefit from a reconsideration of this position and its context of emergence, which is a good vantage point to trace open problems in consciousness studies back to their historical development.
Return to Status Quo Ante: The Need for Robust and Reversible Pandemic Emergency Measures
Authors: RAINEY STEPHEN , GIUBILINI ALBERTO 
Published: October 2020

AbstractThis paper presents a normative analysis of restrictive measures in response to a pandemic emergency. It applies to the context presented by the Corona virus disease 2019 (COVID-19) global outbreak of 2019, as well as to future pandemics. First, a Millian-liberal argument justifies lockdown measures in order to protect liberty under pandemic conditions, consistent with commonly accepted principles of public health ethics. Second, a wider argument contextualizes specific issues that attend acting on the justified lockdown for western liberal democratic states, as modeled on discourse and accounted for by Jürgen Habermas. The authors argue that a range of norms are constructed in societies that, justifiably, need to be curtailed for the pandemic. The state has to take on the unusual role of sole guardian of norms under emergency pandemic conditions. Consistently with both the Millian-liberal justification and elements of Habermasian discourse ethics, they argue that that role can only be justified where it includes strategy for how to return political decisionmaking to the status quo ante. This is because emergency conditions are only justified as a means to protecting prepandemic norms. To this end, the authors propose that an emergency power committee is necessary to guarantee that state action during pandemic is aimed at re-establishing the conditions of legitimacy of government action that ecological factors (a virus) have temporarily curtailed.
Five steps towards a global reset: lessons from COVID-19
Authors: Hawkes Corinna 
Published: October 2020

AbstractCOVID-19 has stimulated calls for a ‘global reset’ to address major global challenges and ‘build back better’. This Intelligence Briefing makes the case that the experience of COVID-19 itself, particularly the way it reverberated across multiple systems, shines light on the vital steps needed to advance a global reset. It brings together the evidence that the causes, severity and effects of COVID-19 cut across multiple interconnected systems, notably environmental, health, political, social, economic and food systems, as did the responses to it. All of these systems affected each other: responses implemented to address problems in one system inevitably led to effects on others. This Intelligence Briefing uses this evidence to identify five practical steps needed to advance a global reset. First, train systems leaders. Second, employ a new cadre of ‘systems connectors’. Third, identify solutions across systems. Fourth, manage trade-offs for the long and short term. Fifth, kick-start system redesign for co-benefits. Implementing these steps will be extraordinarily challenging, especially given the short-term imperative to ‘bounce back’. But for any business, organization, government or United Nations agency serious about addressing long-term sustainability challenges, the opportunity is there to use these five practical actions to press the global reset button.
A Portable Magnetometer for Magnetic Measurements of Meter‐Sized Meteorites
Authors: Clavé Elise , Maurel Clara , Lima Eduardo A. , Shah Jay , Mansbach Elias N. , Uehara Minoru , Weiss Benjamin P. 
Published: October 2020

AbstractMeteorites contain records of past magnetic fields in the form of natural remanent magnetization (NRM). A key property of meteorite magnetization that provides information about its origin is its dependence on spatial scale. In particular, understanding how the mean remanent magnetization varies from the scale of meteorites to the global scale of their parent bodies would aid in the interpretation of spacecraft magnetometry data. However, the vast majority of meteorite samples whose remanent magnetization have been measured have sizes <10 cm due to the limited size range accommodated by laboratory magnetometers. To address this limitation, we developed a portable magnetometer array that enables remanence measurements of meter‐size meteorites in a non‐magnetically shielded environment. The instrument measures both NRM and induced magnetization using two orthogonal square Helmholtz coil pairs that compensate the vertical and horizontal components of the background magnetic field. An array of four magnetometers mounted on a movable aluminum rail measures the magnetic field at multiple locations around the sample. The instrument is transportable and can be adapted to different sample sizes. After distinguishing the induced component from the remanent component of a sample's total field, the remanence can be estimated from a multipole field inversion combined with nonlinear least squares method. We validated the instrument and data processing on a magnet of known magnetic moment and measured the NRM of a meter‐sized iron meteorite.
Rethinking Lunar Mare Basalt Regolith Formation: New Concepts of Lava Flow Protolith and Evolution of Regolith Thickness and Internal Structure
Authors: Head James W. , Wilson Lionel 
Published: October 2020

AbstractLunar mare regolith is traditionally thought to have formed by impact bombardment of newly emplaced coherent solidified basaltic lava. We use new models for initial emplacement of basalt magma to predict and map out thicknesses, surface topographies and internal structures of the fresh lava flows, and pyroclastic deposits that form the lunar mare regolith parent rock, or protolith. The range of basaltic eruption types produce widely varying initial conditions for regolith protolith, including (1) autoregolith, a fragmental meter‐thick surface deposit that forms upon eruption and mimics impact‐generated regolith in physical properties, (2) lava flows with significant near‐surface vesicularity and macroporosity, (3) magmatic foams, and (4) dense, vesicle‐poor flows. Each protolith has important implications for the subsequent growth, maturation, and regional variability of regolith deposits, suggesting wide spatial variations in the properties and thickness of regolith of similar age. Regolith may thus provide key insights into mare basalt protolith and its mode of emplacement.
Emerged Coral Reefs Record Holocene Low‐Angle Normal Fault Earthquakes
Authors: Biemiller James , Taylor Frederick , Lavier Luc , Yu Tsai‐Luen , Wallace Laura , Shen Chuan‐Chou 
Published: October 2020

AbstractLow‐angle normal faults (LANFs; dip <30°) accommodate kilometers of crustal extension, yet it remains unclear whether these faults can host large earthquakes or if they predominantly creep aseismically. Most active LANFs typically slip at rates of <3 mm/year. Here, we report U‐Th ages from a series of distinct levels of formerly shallow‐living corals killed by uplift‐induced emergence of the footwall of one of the world's fastest‐slipping LANFs, the Mai'iu fault in Papua New Guinea, which slips at rates of 8–12 mm/year. Coral ages and coastal morphology indicate punctuated episodic uplift events consistent with seismic slip on the Mai'iu fault. Maximum episodic uplift increments of 0.5–1.8 m imply earthquakes of Mw > 7. We present the first coral paleoseismological record of normal fault earthquakes, which constrain the timing and surface uplift patterns of multiple LANF seismic cycles and confirm that LANFs can slip in large (Mw > 7) earthquakes.
Automatic Auroral Boundary Determination Algorithm With Deep Feature and Dual Level Set
Authors: Tian Chen‐Jing , Du Hua‐Dong , Yang Ping‐Lv , Zhou Ze‐Ming , Zhao Xiao‐Feng , Zhou Su 
Published: October 2020

AbstractThe morphology of the auroral oval is an important geophysical parameter that helps to further understand the solar wind‐magnetosphere‐ionosphere coupling process. However, it is still a challenging task to automatically obtain auroral poleward and equatorward boundaries completely and accurately. In this paper, a new model based on the deep feature and dual level set method is proposed to extract the auroral oval boundaries in the images acquired by the Ultraviolet Imager (UVI) onboard the Polar spacecraft. With the deep feature extracted by the convolutional neural network (CNN), the corresponding deep feature energy functional is constructed and incorporated into the variational segmentation framework. The dual level set method is implemented to extract the accurate poleward and equatorward boundaries with the gradient descent flow. The experimental results on the test data set demonstrate that this model can extract complete auroral oval contours that are consistent well with annotations and owns higher accuracy compared with the previously proposed methods. Comparison between the extracted auroral boundaries and the precipitating boundaries determined by Defense Meteorological Satellite Program (DMSP) SSJ precipitating particle data validates that the proposed method is trustworthy to capture the global morphology of the auroral ovals.
Magnetic Energy Conversion and Transport in the Terrestrial Magnetotail Due to Dipolarization Fronts
Authors: Wang Lei , Huang Can , Cao Xin , Du Aimin , Ge Yasong S. 
Published: October 2020

AbstractDipolarization front (DF) is an important region involved with energy conversion and flux transport in the planet's magnetotail. Using observation data from the recent Magnetospheric Multiscale (MMS) mission, we have identified and analyzed 215 DF events. Significant magnetic energy conversion and transport are observed at the DFs, which show strong dawn‐dusk asymmetry. We find that the transport process dominates the change of local magnetic energy. Nearly 70% of the events show net Poynting flux flowing into the DF region. Such effect is more significant than local magnetic energy dissipation, averagely. When DF approaches the near‐Earth region, the net flow‐in Poynting flux decreases and magnetic energy dissipation increases. Our results suggest that the downstream magnetic energies of transient magnetic reconnections in the midtail may be transported to the near‐Earth region by one DF event after another. These intensive strikes to the magnetosphere in the near‐planet region may drive stronger storms, compared with the previous knowledge about DF.
Regulation of cell cycle drivers by Cullin-RING ubiquitin ligases
Authors: Jang Sang-Min , Redon Christophe E. , Thakur Bhushan L. , Bahta Meriam K. , Aladjem Mirit I. 
Published: October 2020

AbstractThe last decade has revealed new roles for Cullin-RING ubiquitin ligases (CRLs) in a myriad of cellular processes, including cell cycle progression. In addition to CRL1, also named SCF (SKP1-Cullin 1-F box protein), which has been known for decades as an important factor in the regulation of the cell cycle, it is now evident that all eight CRL family members are involved in the intricate cellular pathways driving cell cycle progression. In this review, we summarize the structure of CRLs and their functions in driving the cell cycle. We focus on how CRLs target key proteins for degradation or otherwise alter their functions to control the progression over the various cell cycle phases leading to cell division. We also summarize how CRLs and the anaphase-promoting complex/cyclosome (APC/C) ligase complex closely cooperate to govern efficient cell cycle progression.