bluuebunny/crossref_metadata_2025 huggingface dataset:
The Influence of Various Silvicultural Treatments and Forest Operations on Tree Species Biodiversity
Authors: Latterini Francesco , Mederski Piotr S. , Jaeger Dirk , Venanzi Rachele , Tavankar Farzam , Picchio Rodolfo
Published: March 2023

Purpose of Review

Biodiversity is one of the most important features of forest ecosystems. One of the goals of Sustainable Forest Management is to reduce biodiversity disturbance, which can occur as a consequence of timber harvesting. The aim of this review was to define which silvicultural systems and forest operations can have an influence on forest tree biodiversity by summarising the findings of nearly 60 papers published in the last ten years (2013–2022).

Recent Findings

In natural forest ecosystems characterised by a high level of structural complexity, such as uneven-aged tropical forests, selective logging and retention forestry are, in general, suitable forms of intervention that have a limited impact on tree biodiversity. Forest operations, in particular, should be of low intensity and try to simulate as much as possible small-scale natural disturbances. Thinning has proved to be a valid treatment for managing tree biodiversity. However, it is important to shape the magnitude of thinnings according to the management aims. Limited removal is recommended in interventions for maintaining the current structure, and more extensive removal is appropriate in cases when a change in species composition is expected, e.g. in the conversion of planted coniferous stands to uneven-aged mixed or broadleaved stands. In addition, coppicing is suitable for maintaining tree biodiversity due to its effectiveness in fostering the presence of light-demanding tree species. Findings show that it is important to establish the right rotation age, considering that an excessively short period between coppicing interventions can be detrimental to functional biodiversity.

Skid trails and landing sites represent suitable areas for the initial establishment of natural regeneration. However, generally, the level of biodiversity on these sites declines with time as a consequence of soil compaction, thus highlighting the importance of the forest infrastructure network planning.

In uneven-aged tropical forests, selective logging and retention forestry are the most suitable options for maintaining tree biodiversity. Thinning and coppicing help to manage biodiversity, whilst intensive thinning helps to change species composition. Skid trails and landing sites can support natural regeneration. Recommendations and management options were developed, as well as possible future research directions. The authors recommend that future studies should investigate how much tree biodiversity depends on different levels of harvesting technology applied within the same silvicultural treatment.
Modeling anthropogenic affected sediment transport in a mid-sized European river catchment–extension of the sediment rating curve equation
Authors: Wolf Stefanie , Stenger David , Steudtner Felix , Esser Verena , Lehmkuhl Frank , Schüttrumpf Holger
Published: March 2023

Land use and water resource management influence the suspended sediment concentration (SSC) in rivers. Fine sediments are an important driver for river development, even in coarse-material-rich rivers. In this study, the sediment rating curve approach is modified to predict SSC several river-km downstream of a sampling site. Further, the prediction is improved by adding sediment input, storage, and dilution effects through relevant anthropogenic measures through a model identification approach. Thus, the impact of the most severe anthropogenic measures, damming and changes in the length of a channel section for the Rur River, could be identified. Further, the impact of describing parameter changes for those measures on the SSC can be computed and considered in future water resource management. In this approach, particle swarm optimization was used to fit parameters in permutable test- and training data sets to identify linear extensions to the sediment rating curve. The input data consists of (1) SSC, which was obtained by sampling along the river section four times a year over approximately two years, (2) discharge data from river gauges supplemented by rainfall-runoff modeling between stations, (3) rainfall data from meteorological stations, and (4) sub-catchment characteristics like river section length and erosivity obtained with GIS. Via incorporating the river section length and sediment deposition in response to damming, we reduced the RMSE (root mean squared error) from 152.27 to 131.83% with a p-value of 0.073 in the Wilcoxon Signed Rank Test. Further integration of sub-catchment parameters like erosivity led to overfitting and decreased prediction accuracy. A catchment-wide prediction was achieved, but sub-catchments operate on different spatial scales with different connectivity behavior, which restricts the transferability of the equation. SSC-Q hystereses provide the first indications of characteristic sediment sources and were used to discuss connectivity behavior within the study area. They are recommended as part of a (sub-) catchment characterization for further studies.
Factors influencing the lived experience of paramedics facing ethical dilemmas: a case comparison
Authors: Shearer Kirsty , Thomas Matthew , Signal Tania , Townsend Ruth
Published: March 2023

Paramedics encounter ethical dilemmas at work, and while previous research has improved ethics education and practice, more can be learned from the lived experience of paramedics facing ethical challenges. This paper explores the lived experience of two paramedics, one with five years’ experience, the other twenty, presented with comparable cases. The participants, who were interviewed in a broader qualitative study exploring practical wisdom, were asked to select a case involving ethical decision-making from their own practice experience. Semi-structured interviews employed the five-step Critical Decision Method as a framework to explore various aspects of the decision-making process. The two cases were identified as exemplars of prominent themes suitable for discussion. The findings highlighted several factors that influence paramedic ethical decision-making, including practical wisdom, communication and teamwork, clinical support, and education. This case comparison identifies a greater need to focus education on the fostering of practical wisdom, and the development of non-technical skills such as communication and teamwork, supported by interprofessional education endeavours. Furthermore, greater access to support for paramedics must be available to further evolve practical wisdom. The combination of improved education and support will likely cater for the full spectrum of ethical challenges faced by paramedics in their work.
The influence of printing parameters on the mechanical properties of 3D printed TPU-based elastomers
Authors: Bruère V. M. , Lion A. , Holtmannspötter J. , Johlitz M.
Published: March 2023

Additive Manufacturing (AM) becomes more and more focus of studies in the scientific community. Nevertheless, elastomers in 3D printing are still a relatively understudied topic despite their extensive use in machine components. The further understanding of the technologies and knowledge acquirement are fundamental steps towards the improvement of the printing process and the broadening of feasible applications of 3D printed elastomers. This work focused on thermoplastic polyurethanes printed with Fused Filament Fabrication (FFF) and investigated the effect of infill deposition angle and contour lines on the tensile and the stress relaxation behaviour. Samples were printed in alternating as well as unidirectional infill orientations, the latter without and with outlines. Tensile tests revealed that alternating orientations of 0°–90° and 45°–135° have a similar behaviour and benefit the integrity of the part. The fully unidirectional orientation at 90° hindered the tensile strength due to the absence of outlines and consequent delamination. All comparative analyses displayed a low influence of the raster angle at lower strains. Stress relaxation results showed similar behaviour for samples with outlines, without a clear effect of the infill orientations. In summary, contour lines are essential and an alternating orientation is recommended for better part integrity.
Pluralitätskompetenz als Einheitskriterium: Die »philosophischen Neigungen« der DVjs
Authors: Martus Steffen
Published: March 2023

Aus Perspektive der praxeologischen Wissenschaftsforschung sowie quantitativer Verfahren und auf Grundlagen von Archivalien zeigt sich, dass nicht in der geistesgeschichtlichen Methode, sondern in der impliziten Anerkennung disziplinärer, methodischer und theoretischer Pluralität jene literaturwissenschaftliche Einheit liegt, die die DVjs von ihren Beiträgen erwartet.
Literaturwissenschaft und Geistesgeschichte: eine Provokation?
Authors: Osterkamp Ernst
Published: March 2023

Die Kanonfixiertheit der Literaturwissenschaften ist in Deutschland auch ein Erbe der Geistesgeschichte; nur literaturhistorische Neugier sichert ihnen aber ihre Erkenntnismöglichkeiten und bewahrt sie vor disziplinärer Langeweile.
Adhesive Strength and Rupture Behaviour of Birch Tars Made with Different Stone Age Methods
Authors: Koch Tabea J. , Schmidt Patrick
Published: March 2023

Birch tar is the earliest adhesive produced by Neanderthals in the European Palaeolithic. Experimental studies have proposed a number of aceramic (i.e. without the use of ceramics) birch tar–making techniques, but to date, no archaeological evidence for any of these techniques has been brought forward. The likelihood of one of those methods being actually used in the Stone Age may be investigated by evaluating the method’s complexity, efficiency and the performance of the tar obtained. In this study, we experimentally produce birch tar with four common experimental aceramic techniques. These tars are tested for their mechanical properties using lap-shear tests. We found that tar made with the aboveground condensation method is strongest in terms of its adhesive strength. The tar also shows the most consistent behaviour throughout our test series. The weakest adhesive was observed in tar made with an underground (i.e. oxygen-depleted) technique resembling double-pot distillation (raised structure). Two supplementary methods yielded intermediate values: the recently proposed cobble-groove method produces tar with plastic behaviour. Tar made with another underground technique (pit roll) is almost as strong as condensation method tar. This study adds to our understanding of adhesive performance of birch tar made with different aceramic techniques. It also allows understanding the potential use of one method instead of another.
Core invertibility of operators from the algebra generated by two orthogonal projections
Authors: Böttcher Albrecht , Spitkovsky Ilya M.
Published: March 2023

A Hilbert space operatorAis said to be core invertible if it has an inner inverse whose range coincides with the range ofAand whose null space coincides with the null space of the adjoint ofA. This notion was introduced by Baksalary, Trenkler, Rakić, Dinčić, and Djordjević in the last decade, who also proved that core invertibility is equivalent to group invertibility and that the core and group inverses coincide if and only ifAis a so-calledEPoperator. The present paper contains criteria for core invertibility and for theEPproperty as well as formulas for the core inverse for operators in the von Neumann algebra generated by two orthogonal projections.
Sensory Anthropology
Authors: Low Kelvin E. Y.
Published: March 2023

From constructions of rasa (taste) in pre-colonial India and Indonesia, children and sensory discipline within the monastic orders of the Edo period of Japan, to sound expressives among the Semai in Peninsular Malaysia, the sensory soteriology of Tibetan Buddhism, and sensory warscapes of WWII, this book analyses how sensory cultures in Asia frame social order and disorder. Illustrated with a wide range of fascinating examples, it explores key anthropological themes, such as culture and language, food and foodways, morality, transnationalism and violence, and provides granular analyses on sensory relations, sensory pairings, and intersensoriality. By offering rich ethnographic perspectives on inter- and intra-regional sense relations, the book engages with a variety of sensory models, and moves beyond narrower sensory regimes bounded by group, nation or temporality. A pioneering exploration of the senses in and out of Asia, it is essential reading for academic researchers and students in social and cultural anthropology.
Janácek beyond the Borders
Authors: Katz Derek
Published: March 2023

This contextual study of Janácek's operas reveals the composer's creative responses to a wide range of Czech and non-Czech traditions.
Impact of a syndrome-specific antibiotic stewardship intervention on antipseudomonal antibiotic use in inpatient diabetic foot infection management
Authors: McCreery Randy J. , Lyden Elizabeth , Anderson Matthew , Van Schooneveld Trevor C.
Published: March 2023

Objective:

To demonstrate that a syndromic stewardship intervention can safely reduce antipseudomonal antibiotic use in the treatment of inpatient diabetic foot infections (DFIs).

Intervention and method:

From November 2017 through March 2018, we performed an antimicrobial stewardship intervention that included creation of a DFI best-practice guideline, implementation of an electronic medical record order set, and targeted education of key providers. We conducted a retrospective before-and-after study evaluating guideline adherent antipseudomonal antibiotic use 1 year before and after the intervention using interrupted time-series analysis.

Setting:

University of Nebraska Medical Center, a 718-bed academic medical center in Omaha, Nebraska.

Patients:

The study included 193 adults aged ≥19 years (105 in the preintervention group and 88 in the postintervention group) admitted to non–intensive care units whose primary reason for antibiotic treatment was diabetic foot infection (DFI).

Results:

Guideline-adherent use of antipseudomonal antibiotics increased from 39% before the intervention to 68% after the intervention (P ≤ .0001). Antipseudomonal antibiotic use decreased from 538 days of therapy (DOT) per 1,000 DFI patient days (PD) before the intervention to 272 DOT per 1,000 DFI PD after the intervention (P < .0001), with a statistically significant decrease in both level of use and slope of change. We did not detect any changes in length of stay, readmission, amputation rate, subsequent positive Clostridioides difficile testing, or mortality.

Conclusions:

Our 3-component intervention of guideline creation, implementation of an order set, and targeted education was associated with a significant decrease in antipseudomonal antibiotic use in the management of inpatient DFIs. DFIs are common and should be considered as opportunities for syndromic stewardship intervention.
Against Universal Epistemic Instrumentalism
Authors: Willoughby James Bernard
Published: March 2023

Beliefs should conform to some norms. Epistemic instrumentalism holds that your beliefs should conform to these epistemic norms just because conforming is useful. But there seems to be cases where conforming to the epistemic norms isn’t useful at all, as in so-called “too-few-reasons” cases. In response to these cases, universal epistemic instrumentalists argue that despite first appearances, it is always useful to conform to the epistemic norms. I argue that all current versions of this universalist response are objectionable. I conclude with a conjecture about why no version of universalism will succeed.
Have Faith in Business: Nestlé, Religious Shareholders, and the Politicization of the Church in the Long 1970s
Authors: Pitteloud Sabine
Published: March 2023

During the 1970s, religious activists were heavily involved in national and international campaigns against multinationals and urged firms to adapt their behavior to align with Christian ethics. This article analyzes the strategies of Nestlé in addressing religious activism at three levels: national, international, and organizational. The analysis examines Nestlé’s collaboration with other Swiss and European multinationals and high-ranking church representatives in establishing dialogue platforms that sought to improve mutual understanding and promote tolerance for global capitalism. Nestlé also contributed to the creation of guidelines for the main churches in Switzerland that were aimed at their partial depoliticization. When Nestlé’s executives faced religious shareholder activists during its shareholders’ annual general meetings, they chose to engage with them to avoid their radicalization, although most of their demands ultimately remained unanswered. Overall, Nestlé contributed to the reorientation of religious discussions to small-scale ethical problems and business self-regulation rather than to substantial reforms of the capitalist economic system.
Taking the Teleology of History Seriously: Lessons from Hegel's Logic
Authors: Yang Chen , Yeomans Christopher
Published: March 2023

To oversimplify quite a bit, scholars’ presentation of Hegel's teleology constitutes a continuum according to how more-or-less secured the progress towards the goal is supposed to be, which tracks roughly the nature of the end and its necessity. In this article, rather than focus on the end and progress towards it, we will focus on the means and structure of teleological relationships on Hegel's account. This focus follows from an essential feature of Hegel's discussion of teleology in the Logic, in which teleology is introduced to solve a problem in the individuation of entities. It will turn out that the fullest actualization of the end is in the durable means, which is also thereby individuated. And it will turn out that the paradigmatic historical means—the state—is tensed, as it were, between the end and its realization that makes it synchronically historical. This synchronic historicity is missing in the usual progressive and thus diachronic accounts of the teleological process of history. But first we step back even farther (at least historically). We begin by taking up the two most important philosophical accounts of teleology for Hegel, namely those of Aristotle and Kant. Then we go to Hegel's Logic for his reconstruction of teleological processes against the background of the explanatory need for individuation. We focus on four aspects of Hegel's account: that teleology is a structure of reciprocal interaction, that the purpose is an immanent governing principle, that change is the price of immanence, and that the durable means is the teleological object par excellence. Finally, we trace these features through Hegel's account of world history and conclude with some brief remarks on the historicity of the state described in the Philosophy of Right.
Relationship between local-scale topography and vegetation on the invasive C4 perennial bunchgrass buffelgrass (Pennisetum ciliare) size and reproduction
Authors: Hovanes Katherine A. , Lien Aaron M. , Baldwin Elizabeth , Li Yue M. , Franklin Kim , Gornish Elise S.
Published: March 2023

Buffelgrass [Pennisetum ciliare (L.) Link] is an invasive C4 perennial bunchgrass that is a threat to biodiversity in aridlands in the Americas and Australia. Topography influences P. ciliare occurrence at large spatial scales, but further investigation into the relationship between local-scale topography and P. ciliare growth and reproduction would be beneficial. Further, density-dependent effects on P. ciliare growth and reproduction have been demonstrated in greenhouse experiments, but the extent to which density dependence influences P. ciliare in natural populations warrants further investigation. Here we present a study on the relationships between local-scale topography (aspect and slope gradient) and vegetation characteristics (shrub cover, P. ciliare cover, and P. ciliare density) and their interactions on individual P. ciliare plant size and reproduction. We measured slope gradient, aspect, shrub cover, P. ciliare cover, P. ciliare density, and the total number of live culms and reproductive culms of 10 P. ciliare plants in 33 4 by 4 m plots located in 11 transects at the Desert Laboratory at Tumamoc Hill, Tucson, AZ, USA. We modeled the relationships at the local scale of (1) P. ciliare cover and density with aspect and slope gradient and (2) P. ciliare size and reproduction with abiotic (slope gradient and aspect) and biotic (P. ciliare cover and density and native shrub and cacti cover) characteristics. Aspect and slope gradient were poor predictors of P. ciliare cover and density in already invaded sites at the scale of our plots. However, aspect had a significant relationship with P. ciliare plant size and reproduction. Pennisetum ciliare plants on south-facing aspects were larger and produced more reproductive culms than plants on other aspects. Further, we found no relationship between P. ciliare density and P. ciliare plant size and reproduction. Shrub cover was positively correlated with P. ciliare reproduction. South-facing aspects are likely most vulnerable to fast spread and infilling by new P. ciliare introductions.
Approaching Incidental Music: ‘Reflexive Performance’ and Meaning in Till Damaskus (III)
Authors: BROAD LEAH
Published: March 2023

Incidental music of the early twentieth-century has received little musicological attention, despite its widespread use during this period of history. Theatres were a popular means by which audiences could interact with new music, and composers could experiment with new ideas and build collaborative relationships. Using a 1926 Swedish production of August Strindberg’s Till Damaskus (III), directed by Per Lindberg with music by Ture Rangström, this article argues for the importance of analysing incidental music as collaborative performance. It explores the use of ‘reflexive performance’ as a method of analysis, combined with semiotic and intermedial approaches.
Reconstructing a ‘Special Relationship’ from Scattered Archives: America, Britain, Europe and the ISCM, 1922–45
Authors: BOWAN KATE
Published: March 2023

In an account of the early history of the International Society for Contemporary Music (ISCM) for a 1946 BBC broadcast, president of the ISCM Edward Dent recounted the ‘two main reasons’ why London was proposed as the society’s initial headquarters at that first meeting in 1922 in Salzburg. Firstly, he maintained, ‘it stood apart from all the quarrels and jealousies of the Continent’, and secondly, and most importantly for the purposes of this article, he outlined a triangulated relationship: ‘[London] was regarded as a link between Europe and America.’ ‘American music’, he continued, ‘really needed that link in those days; and the general feeling of the European musicians was that they would provide the music and England the money to pay for it.’ But then (again using ‘the Continent’ and ‘Europe’ interchangeably) he signalled a profound shift: ‘Today the situation has changed. It is Europe now which needs the link with America, for America has become a great music-producing country, while it will take the Continent some little time to recover its creative energy.’262 Tantalizing though Dent’s references to ‘links’ may be, obtaining clarity on what these transatlantic connections were and how they operated has proved elusive. The telling of an international and transnational history by way of searches of nationally bounded archival collections has raised certain methodological challenges.263 Rising to meet them, however, has uncovered some interesting threads which in turn offer an alternative dimension to a story that is often told from a Eurocentric perspective; one, as already noted by the editors of this round table, which places the Austro-Germanic modernist tradition at its centre.264 Moreover, Dent’s framework of a transatlantic musical internationalism that triangulated England, Europe and America as three distinct entities with a set of different and fluid musical relationships and roles has obvious resonances today as Britain, the USA and Europe are once again struggling to rearticulate their positions in respect of each other in a rapidly shifting world order.
Wall jets created by single and twin high pressure jet impingement
Authors: Miller P. , Wilson M.
Published: March 2023

An extensive experimental investigation into the nature of the wall jets produced by single and twin normal jet impingement has been undertaken. Wall jet velocity profiles have been recorded up to 70 jet diameters from the impingement point, at pressures representative of current VStol technology. The tests used fixed convergent nozzles, with nozzle height and spacing and jet pressure being varied. Single jet impingement displays a consistent effect of nozzle height on wall jet development. For twin jet cases a powerful reinforcement exists along the wall jet interaction plane. Remote from the interaction plane the wall jets are weaker than those produced by a single jet impingement.
An equation decoupling technique for identification of unstable aircraft with unsteady aerodynamic modelling
Authors: Singh J. , Raisinghani S. C.
Published: March 2023

A simplified trailing vortex concept has been used to model unsteady aerodynamic effects onto the mathematical model for an augmented unstable aircraft. An output error method with, and without, an equation decoupling technique in the frequency domain has been used for the estimation of parameters. The two approaches of estimation are compared for the cases where unsteady effects are included or excluded from the estimation model. It is shown that the incorporation of the equation decoupling technique makes the estimation algorithm robust with respect to initial guess values of the parameters. Finally, the inclusion of unsteady aerodynamics is shown to reduce the variation in the parameter estimates due to different control input forms.
A generic harmonic rotor model for helicopter flight simulation
Authors: Chaimovich M. , Rosen A. , Rand O.
Published: March 2023

A new rotor model for helicopter flight mechanics simulation is presented. The rotor dynamics are described using multiblade coordinates, and the aerodynamic loads include nonlinear effects such as stall and compressibility. These loads are described as harmonic series. The number of harmonics in the series determines the model accuracy. Thus by changing the number of harmonics from one to a large number, it is possible to obtain models that range between a quasi tip path plane approach and an accurate blade element model. The user of the model can very easily change the model accuracy and consequently its efficiency. The new rotor model is investigated and its application for trim and manoeuvre calculations is presented and discussed.
Impact of wiggler magnetic field on wakefield generation and electron acceleration by Gaussian, super-Gaussian and Bessel–Gaussian laser pulses propagating in collisionless plasma
Authors: Abedi-Varaki M. , Daraei M.E.
Published: March 2023

In this research, the process of electron acceleration and wakefield generation by Gaussian-like (GL), super-Gaussian (SG) and Bessel–Gaussian (BG) laser pulses through cold collisionless plasma in the presence of a planar magnetostatic wiggler are studied. Three different types of laser spatial profiles, GL, SG and BG, are considered. Additionally, using the hydrodynamics fluid equations, Maxwell's equations as well as the perturbation technique for GL, SG and BG laser pulses in the weakly nonlinear regime and in the presence of a planar magnetostatic wiggler, governing equations for analysing the laser wakefield and electron acceleration have been derived and compared correspondingly. In addition, the effect of some important factors, including the wiggler field strengths, laser intensity, pulse length, plasma electron density and laser frequency on the wakefield and the electron energy gain, have been investigated. Numerical results show that enhancing the wiggler magnetic field results in an increase in the amplitude of the wakefield. Furthermore, it is observed that in comparison with the wakefield amplitude excited by SG and GL laser pulses, the amplitude of the wakefield excited by BG laser pulse is larger when the wiggler field is enhanced. Moreover, it is realized that the type of the laser profile, selected laser parameters and wiggler magnetic field are the most decisive and effective factors in the wakefield amplitude and shape of wakefield generation through cold collisionless plasma. Also, it is seen that as the pulse length declines, the amplitude of the wakefield increases, and correspondingly the resonance positions shift to higher

${({\varOmega _w}/{\varOmega _p})_{max}}$

values.
Scouting and Growing Diverse Undergraduate Talent: UCLA’s Race, Ethnicity, Politics & Society Lab
Authors: Pérez Efrén
Published: March 2023

This article discusses the origins, metrics, and methods of UCLA’s Race, Ethnicity, Politics & Society Lab, which trains cadres of undergraduate researchers, many of whom are students of color. The article focuses intently on the connections between the professionalization of undergraduate researchers and the production of greater intellectual, racial, and gender diversity in a university setting. The article also provides a blueprint to steer undergraduate students toward producing peer-reviewed publications for major political science journals. Finally, specific strategies to initiate and sustain a research lab operation with undergraduate researchers in mind are offered.
KEYNES, RAMSEY, AND PRAGMATISM: A COMMENT
Authors: Bateman Bradley W.
Published: March 2023

This comment makes a response to one of several points made in Bill Gerrrard’s (2023) criticisms of Bateman (2021) in particular, this comment clarifies Keynes’s use of mathematical expectation in The General Theory (1936).
Mapping Byzantine Sericulture in the Global Transfer of Technology
Authors: Wu Gang
Published: March 2023

The transfer of sericulture into Byzantium is a critical episode in the global dissemination of silk production technology. However, it is now widely accepted that the explanatory model portraying the transfer as a one-off event is at odds with the historical facts. This article seeks to reassess the transfer of this technology through the lens of appropriation, interpreted as a process. Based on a detailed analysis of the limited evidence available, it attempts to reconstruct the process from transregional and diachronic perspectives, embracing, on the one hand, the transmission of sericulture from China to Byzantium and, on the other, its development in Byzantium over time. This reconstruction offers an explanation for unresolved historical problems. It also constitutes a template for modelling the global transfer of technology in the premodern world, potentially of great value for an in-depth understanding of the transfer.
Authoritarian Gender Equality Policy Making: The Politics of Domestic Violence in Russia
Authors: Johnson Janet Elise
Published: March 2023

This article provides an analytical framework for understanding why and how many authoritarian regimes have recently adopted reforms that address gender equality. I illustrate and hone the framework by tracing three policy-making processes on domestic violence in Russia, an important and least-likely case for such reforms. While recent scholarship finds the importance of international leverage, strategic actions by women’s groups, and regime interest in sidelining religious extremists, this study highlights other opportunities and agents and specifies authoritarian mechanisms such as intra-elite conflict, signaling between the autocrat and elites, and selective responsiveness. Drawing on the scholarship on authoritarian regime dynamics, policy making in Russia, and gender policy making, this study contributes to the literature on the relationship between gender and regime type by focusing on the micrologics of authoritarian policy making.
The emotional fabric of populism during a public health crisis: How anger shapes the relationship between pandemic threat and populist attitudes
Authors: Filsinger Maximilian , Hofstetter Nathalie , Freitag Markus
Published: March 2023

While conventional wisdom connects crises and external threats to increasing support for populism, several questions remain unanswered. Following insights of affective intelligence theory (AIT), we posit that anger and fear elicited by pandemic threat relate differently to populist attitudes. While such relations have already been explored in the context of other hazards (such as financial turmoil, terrorism, or immigration), our study allows us to evaluate the emotional bedrocks of populism in the context of a threat that is not apparently connected to the classical political grievances underlying populism. Expanding the literature on psychological underpinnings of populism and on the political consequences of the pandemic, our analyses of original survey data support our contentions that pandemic threat-induced anger is positively related to populist attitudes while fear is negatively linked to populist stances. This holds in particular for anti-elitism and the Manichean outlook inherent in populism. Altogether, we provide new comparative evidence to the puzzle about the emotional bedrocks of populism by illuminating a domain that has not been systematically explored before.
Civilian victimization and ethnic attitudes in Africa
Authors: Villamil Francisco
Published: March 2023

Previous research shows that violence is an important factor driving ethnic identification and grievances, but most works that explore micro-level effects focus on specific cases and have limited external validity. This article looks at the individual-level consequences of civilian victimization in a large sample across Africa. Combining georeferenced survey data from several rounds of the Afrobarometer, victimization events from the UCDP-GED, and data on collective targeting from the ethnic one-sided violence dataset, it studies the effect of exposure to violence on ethnic identification and self-reported ethnic grievances. Results show that violence increases ethnic identification and ethnic grievances particularly when it is committed by state forces and among individuals who belong to an ethnic group that was collectively targeted in the past.
A novel passive shoulder exoskeleton for assisting overhead work
Authors: Ding Shuo , Reyes Francisco Anaya , Li Tong , Yu Haoyong
Published: March 2023

Shoulder exoskeletons (SEs) can assist the shoulder joint of workers during overhead work and are usually passive for good portability. However, current passive SEs face the challenge that their torque generators are often attached to the human arm, which adds a significant amount of weight to the user’s arms, resulting in additional energy consumption of the user. In this paper, we present a novel passive SE whose torque generator is attached to the user’s back and assists the shoulder joint through Bowden cables. Our approach greatly reduces the weight on the user’s arms and can accommodate complex shoulder joint movements with simple and lightweight mechanical structure based on Bowden cables. In addition, to match the nonlinear torque requirements of the shoulder joint, a unique spring-cam mechanism is proposed as the torque generator. To verify the effectiveness of the device, we conducted a usability test based on muscle activations of 10 healthy subjects. When assisting overhead work, the SE significantly reduced the mean and maximum electromyography signals of the shoulder-related muscles by up to 25%. The proposed SE contributes to further research on passive SE design to improve usability, especially in terms of reducing weight on human arms.
Do Sexist Comments Hinder Participation in Online Political Discussions?
Authors: Reich Sabine , Bachl Marko
Published: March 2023

Abstract: Women who visibly engage in politics online experience a lot of backlash. The presented study investigates sexist incivility against women in online political spaces as a possible explanation for the gender gap in online political discussion and expression. Online sexism solidifies the masculine norm in online political spaces. Drawing on social cognitive theory and the theory of normative social behavior, we understand online incivility as communication mechanisms that enforce gender norms in online political discussions. We use a preregistered online survey experiment with German Internet users to investigate how sexist comments in online political discussions affect women’s participation in the discussion, perceived social norms about participating, and their internal political efficacy. We found no effects of sexist comments on the propensity to engage in the discussion or the political efficacy to contribute. However, the presence of sexist comments increased the fear of sanctions in both men and women. The null findings of the preregistered experiment occurred despite sufficient statistical power and a successful treatment check. We discuss several possible explanations for the null effects and ways forward.
Effects of Issue- and Character-Based Narrative Political Ads on Ad Evaluations
Authors: Shen Fuyuan , Yang Guolan , Conlin Jeff , Diddi Pratiti
Published: March 2023

Abstract: The purpose of the present study is to explore how narrative political ads interact with other message strategies in affecting recipients’ ad responses. To accomplish that, we conducted a 2 × 2 × 2 between-subjects experiment whereby participants viewed political ads manipulated by message format (non-narrative vs. narrative), message valence (negative vs. positive), and message focus (issue vs. character). Results suggested that narrative political ads elicited favorable advertising evaluations via increased transportation and reduced counterarguing. Moreover, when political ads attacked the competing candidate’s character, the narrative message led to higher levels of empathy and lower levels of counterarguing than the non-narrative message. Reduced counterarguing was the mechanism through which favorable ad evaluations were generated. These findings have both theoretical and practical implications.
Large Contribution of Ozone‐Depleting Substances to Global and Arctic Warming in the Late 20th Century
Authors: Sigmond M. , Polvani L. M. , Fyfe J. C. , Smith C. J. , Cole J. N. S. , England M. R.
Published: March 2023

While previous studies have suggested a substantial role of ozone‐depleting substances (ODSs) in historical climate change, their relative contribution to historical anthropogenic warming has not been quantified before. Analyzing all‐but‐one‐forcing, 20‐member ensembles of historical simulations with a state‐of‐the‐art Earth System Model, we find that over the 1955–2005 period ODSs are responsible for 30% of global warming, 37% of Arctic warming, and 33% of summertime Arctic sea ice loss. Effective Radiative Forcing (ERF) calculations reveal that the global warming response to ODSs per unit of ERF is about 20% larger than for CO2, which may be due to stronger feedbacks and the difference in temporal evolution with ODSs having leveled off and CO2 still increasing in 2005. While the response to both peaks in the Arctic, the ODS ERF opposes Arctic amplification more than the CO2 ERF. Our findings highlight the importance of the Montreal Protocol for mitigating future climate change.
Deciphering the Signatures of Oceanic Convective Rain Cells Using Simultaneous Observations From C‐Band Synthetic Aperture Radar Onboard EOS‐04 Satellite and GPM Measurements
Authors: Subrahmanyam Kandula V. , Bothale Rajashree V. , Swapna Mullukutla , Chauhan Prakash
Published: March 2023

Earth Observation Satellite (EOS)‐04 launched on 14 February 2022, carries a C‐band Synthetic Aperture Radar (SAR) for Agriculture, Forestry, Hydrology, and Flood mapping applications. In this paper, we have used C‐band SAR images and near‐simultaneous observations from the global precipitation measurements (GPM) to study the signatures of multiple convective rain cells. The bright patches are found on C‐band SAR imagery, which depicts the information of hydrometeors such as graupels or hails in the melting layer. For the first time, unambiguously estimated the diameter of the convective core rain cells from the C‐band SAR backscattered signal and compared with near‐simultaneous observations from GPM‐GMI and Ku‐band radar to confirm our findings. Thus, the present study demonstrates the potential of C‐band SAR for identifying the signatures of convective rain cells.
Universal Time Variations in the Magnetosphere and the Effect of CME Arrival Time: Analysis of the February 2022 Event that Led to the Loss of Starlink Satellites
Authors: Lockwood M. , Owens M. J. , Barnard L. A.
Published: March 2023

We study Universal Time (UT) variations in the magnetospheric response to Coronal Mass Ejection (CME) impacts, using the example of the two CMEs that led to the destruction of 38 out of 49 Starlink satellites in early February 2022. We employ the Expanding‐Contracting Polar Cap model to analyze the variation in the size of the ionospheric polar caps and an eccentric dipole model of the geomagnetic field and thereby quantify the UT variations caused by the inductive effect of the diurnal motions of the geomagnetic poles in a “geocentric‐solar” frame of reference (i.e., a frame with an X axis that points from the center of the Earth to the center of the Sun). The results show that use of a quasi‐steady convection model predicts a similar global power deposition into the thermosphere as that inferred here, but does not give the same division of that power between the northern and southern hemispheres. We demonstrate that, through the combined effects of the Russell‐McPherron dipole‐tilt mechanism on solar‐wind magnetosphere coupling and of the diurnal polar cap motions in a geocentric‐solar frame, the power deposited varies significantly with the arrival UT of the CMEs at Earth. We also show that in the events of early February 2022, both CMEs arrived at almost the optimum UT to cause maximum thermospheric heating.
Using Dark Fiber and Distributed Acoustic Sensing to Characterize a Geothermal System in the Imperial Valley, Southern California
Authors: Cheng Feng , Ajo‐Franklin Jonathan B. , Nayak Avinash , Tribaldos Veronica Rodriguez , Mellors Robert , Dobson Patrick ,   the Imperial Valley Dark Fiber Team
Published: March 2023

The Imperial Valley, CA, is a tectonically active transtensional basin located south of the Salton Sea; the area hosts numerous geothermal fields, including significant hidden hydrothermal resources without surface manifestations. Development of inexpensive, rugged, and highly sensitive exploration techniques for undiscovered geothermal systems is critical for accelerating geothermal power deployment as well as unlocking a low‐carbon energy future. We present a case study utilizing distributed acoustic sensing (DAS) and ambient noise interferometry for geothermal reservoir imaging, utilizing unlit fiber‐optic telecommunication infrastructure (dark fiber). The study exploits two days of passive DAS data acquired in early November 2020 over a ∼28‐km section of fiber from Calipatria, CA to Imperial, CA. We apply ambient noise interferometry to retrieve coherent signals from DAS records and develop a bin stacking technique to attenuate the effects from persistent localized noise sources and to enhance retrieval of coherent surface waves. As a result, we are able to obtain high‐resolution two‐dimensional (2D) S wave velocity (Vs) structure to 3 km depth, based on joint inversion of both the fundamental and higher overtones. We observe a previously unmapped high Vs and low Vp/Vs ratio feature beneath the Brawley geothermal system, which we interpret to be a zone of hydrothermal mineralization and lower porosity. This interpretation is consistent with a host of other measurements including surface heat flow, gravity anomalies, and available borehole wireline data. These results demonstrate the potential utility of DAS deployed on dark fiber for geothermal system exploration and characterization in the appropriate geological settings.
Observational and Model Impact of Tonga Volcano Eruption on Schumann Resonance
Authors: Mezentsev A. , Nickolaenko A. P. , Shvets A. V. , Galuk Yu. P. , Schekotov A. Yu. , Hayakawa M. , Romero R. , Izutsu J. , Kudintseva I. G.
Published: March 2023

Tonga volcano eruption on 15 January 2022 was accompanied by an unprecedentedly high lightning activity in the volcano plume which significantly exceeded the lightning activity level of the whole globe. We compare model computations with the observed effect of the Tonga volcano eruption on the global electromagnetic Schumann resonance (SR). This SR disturbance was detected at many observatories covering the whole globe. SR power spectral density was computed using the updated model of the Earth‐ionosphere cavity, with the global lightning detections recorded by the World Wide Lightning Location Network, as a source. The modeled dynamics of the SR disturbances during Tonga eruption agrees qualitatively and quantitatively with SR recordings from six globally separated observatories. Unprecedentedly high lightning activity during the active phase of eruption caused significant suppression of the global lightning detection rate without noticeable effect on real global thunderstorm activity.
Estimating Net Carbon and Greenhouse Gas Balances of Potato and Pea Crops on a Conventional Farm in Western Canada
Authors: Quan Ningyu , Lee Sung‐Ching , Chopra Chitra , Nesic Zoran , Porto Paula , Pow Patrick , Jassal Rachhpal S. , Smukler Sean , Krzic Maja , Knox Sara H. , Black T. Andrew
Published: March 2023

Quantifying the emissions of the three main biogenic greenhouse gases (GHGs), carbon dioxide (CO2), nitrous oxide (N2O) and methane (CH4), from agroecosystems is crucial. In this study continuous measurements of N2O, and CH4 emissions from potato and pea crops in southwest British Columbia, Canada were made using the eddy‐covariance (EC) technique. Flux footprint analysis, coupled with EC and manual nonsteady state chamber measurements, was used to address the spatial heterogeneity resulting from the field edge at the study site. Flux footprint corrections had a larger effect on N2O fluxes than CO2 fluxes because of a more pronounced difference in N2O fluxes between the crop and edge areas. After flux footprint corrections, the potato and pea crops were both weak CO2 sinks with annual net ecosystem exchange values of −57 ± 9 and −97 ± 16 g C m−2 yr−1, respectively. However, after taking carbon (C) export via crop harvest and C import via seeding into account, the potato crop shifted to being a moderate C source of 284 ± 55 g C m−2 yr−1, while the pea crop became near C neutral, sequestering only 30 ± 26 g C m−2 yr−1. Annual GHG balances, quantified by converting N2O and CH4 to CO2 equivalents as pulse emissions using respective global warming potentials on a 100‐year timescale, were 417 ± 88 and 152 ± 106 g CO2e m−2 yr−1 for the potato and pea crops, respectively, with N2O contributing the largest proportion to annual total GHG balances and outweighing the CO2 uptake from the atmosphere.