bluuebunny/crossref_metadata_2025 huggingface dataset:
Stakeholder engagement vs. social distancing—how does the Covid-19 pandemic affect participatory research in EU marine science projects?
Authors: Köpsel Vera , de Moura Kiipper Gabriel , Peck Myron A.
Published: May 2021

In the realm of marine science, engaging with stakeholders (e.g., industry members, policy-makers, managers, NGOs) is an important method applied in many research projects. The Covid-19 pandemic has severely impacted this engagement in two ways. First, social distancing measures forbid most face-to-face participatory activities originally envisioned in projects. Second, the restrictions have caused hardships for the stakeholders being engaged by these projects. We assessed the impact of Covid-19 on stakeholder engagement activities in ongoing EU marine science projects by posing the following questions: What problems has Covid-19 caused for the workflow and outcomes of current research projects, (ii) how have scientists responsible for stakeholder engagement coped with the situation, and (iii) if alternative stakeholder activities were implemented, how have these been evaluated? Our survey was conducted nearly 2 months after the onset of Covid-19 lockdowns. It addressed researchers who engage with stakeholders in EU projects and delivers insights into the practical implications of Covid-19 for stakeholder engagement and the measures taken to tackle this challenge. The paper highlights the impacts of the pandemic on stakeholder engagement in marine science, outlines current coping strategies in different EU projects, and recommends seven practical actions to promote and maintain meaningful exchange with stakeholders in times of social distancing and lockdowns.
Investigation of Chemical Composition and Fiber-Occurrence in Inhalable Particulate Matter Obtained from Dry Cutting Processes of Carbon Fiber Reinforced Concrete Composite, Concrete and the Carbon Fiber Reinforcement Materials
Authors: Koch Arne , Bergelt Paul , Fiala Petra , Käfer Uwe , Orasche Jürgen , Bauer Stefanie , Di Bucchianico Sebastiano , Stintz Michael , Gröger Thomas , Streibel Thorsten , Zimmermann Ralf
Published: May 2021

The most commonly used construction material nowadays is steel-reinforced concrete which underlies corrosion and thus buildings are susceptible for structural collapses. Recently, a new construction material resistant to oxidation and with a higher tensile strength called carbon concrete composite (C3) was developed. The new material allows resource-saving constructions using carbon fiber instead of steel reinforcement materials embedded in a concrete matrix. C3 reinforcements consist of carbon fibers coated with an organic polymer matrix. In this study, abrasive dust from a dry cutting process of two C3 reinforcement materials, as well as a C3 material were investigated with respect to the occurrence of toxic fibers or harmful organic compounds in the inhalable particulate matter (PM) fractions PM2.5 and PM10. It could be shown that the ratio between elemental and organic carbon in PM10 is dependent on the shape of the C3 reinforcement material due to different mechanisms of PM formation. This could have an impact on the toxicity of different C3 reinforcement materials. Harmful fibers according to the World Health Organization (WHO) definition like they are found in asbestos concrete were not found. However, bisphenol A (BPA) as well as the PAHs phenanthrene, anthracene, fluoranthene and pyrene were found due to pyrolysis of the organic matrix material at the edge of the sawblade differentiating the Carcinogenic Equivalency (TEQ) of investigated materials and their PM fractions. Furthermore, derivatives of BPA occurred in abrasive dust from C3 reinforcement materials potentially leading to genotoxicity and reproductive toxicity.
A dislocation density-based model for the work hardening and softening behaviors upon stress reversal
Authors: Lisiecka-Graca Paulina , Bzowski Krzysztof , Majta Janusz , Muszka Krzysztof
Published: May 2021

The mechanical behaviours of microalloyed and low-carbon steels under strain reversal were modelled based on the average dislocation density taking into account its allocation between the cell walls and cell interiors. The proposed model reflects the effects of the dislocations displacement, generation of new dislocations and their annihilation during the metal-forming processes. The back stress is assumed as one of the internal variables. The value of the initial dislocation density was calculated using two different computational methods, i.e. the first one based on the dislocation density tensor and the second one based on the strain gradient model. The proposed methods of calculating the dislocation density were subjected to a comparative analysis. For the microstructural analysis, the high-resolution electron backscatter diffraction (EBSD) microscopy was utilized. The calculation results were compared with the results of forward/reverse torsion tests. As a result, good effectiveness of the applied computational methodology was demonstrated. Finally, the analysis of dislocation distributions as an effect of the strain path change was performed.
A Tale of Two Narratives
Authors: Wermenbol Grace
Published: May 2021

The Holocaust and the Nakba are foundational traumas in Israeli-Jewish and Palestinian societies and form key parts of each respective collective identity. This book offers a parallel analysis of the transmission of these foundational pasts in Israeli-Jewish and Palestinian societies by exploring how the Holocaust and the Nakba have been narrated since the signing of the 1993 Oslo Accords. The work exposes the existence and perpetuation of ethnocentric victimhood narratives that serve as the theoretical foundations for an ensuing minimization – or even denial – of the other's past. Three established realms of societal memory transmission provide the analytical framework for this study: official state education, commemorative acts, and mass mediation. Through this analysis, the work demonstrates the interrelated nature of the Israeli–Palestinian conflict and the contextualization of the primary historical events, while also highlighting the universal malleability of mnemonic practices.
Life as a Bilingual
Authors: Grosjean François
Published: May 2021

About half the world's population knows and uses two or more languages in everyday life, and an increasing number of parents are raising their children bilingual. This makes a resource on what it means to become and be bilingual all the more necessary. This book brings together a selection of posts from the author's highly successful Psychology Today blog, grouped by topic into 15 chapters. The topics covered include, among others, what it means to be bilingual, the extent of bilingualism, how someone becomes bilingual, how bilingualism is fostered in the family, the bilingual mind and brain, and bilingualism across the lifespan. It also includes the author's lively interviews with other experts, delving into their research and their own experience as bilinguals. Written in a highly engaging, readable style, this book is suitable for anyone who wants to better understand those who live with two or more languages.
Adaptive sliding mode formation control for multiple flight vehicles with considering autopilot dynamic
Authors: Li W. , Wen Q. , Zhou H.
Published: May 2021

This paper mainly focuses on the cooperative control of formation configuration for multiple flight vehicles in the three-dimensional space. Considering the external disturbance of the system, the adaptive non-singular terminal sliding mode control law (NTSMC) is designed based on the virtual leader-follower method, which aims to ensure that each flight vehicle reaches the expected terminal position in a limited time and meet the configuration constraints. Further considering the first-order dynamic characteristic of the autopilot, a novel second-order sliding mode control (SOSMC) law is deduced with using the estimated information of sliding mode disturbance observer. The proposed control method ensures that all flight vehicles form the required space formation configuration simultaneously at a pre-designed time, and the chattering phenomenon of the sliding mode surface and acceleration response that nears the equilibrium point is effectively weaken. The stability of the proposed control law is verified by theoretical analysis and lots of mathematical simulations. The results show that the control algorithm in this paper can be used to guidance the formation controller design of multiple flight vehicles in the mid-guidance phase to some extent, and thus the cooperative flight stability of the system can be effectively improved.
Joint adoption of rice technologies among Bolivian farmers
Authors: Martinez Jose Maria , Labarta Ricardo A. , Gonzalez Carolina , Lopera Diana C.
Published: May 2021

Bolivia has disseminated several improved technologies in the rice sector, but the average rice productivity in the country is far below the average trend in Latin America in recent years. Although the economic literature has highlighted the role of agricultural technology adoption in increasing agricultural productivity, gaps remain in understanding how rice growers are deciding to adopt and benefit from available improved rice technologies. Most previous adoption studies have evaluated the uptake of individual technologies without paying attention to the complementarities that alternative improved rice technologies may offer to farmers who face multiple marketing and production needs. This study uses data from a nationally representative sample of Bolivian rice growers to analyze farmers' joint decisions in adopting complementary agricultural technologies controlling for potential correlations across these decisions, as well as the extent of adoption of these practices. Evidence suggests that the decisions on multiple technology adoption are closely related, with common factors affecting both adoption and the extent of adoption. Furthermore, there is a need to better target resource-poor farmers, improve information-diffusion channels on agricultural practices, and better use existing farmers' organizations to enhance rice technology adoption.
Implementation and evaluation of team science training for interdisciplinary teams in an engineering design program
Authors: Abu-Rish Blakeney Erin , Kang Soyoung , Henrikson Katrina , Liu Jonathan T. C. , Seibel Eric J. , Sprecher Jennifer , Summerside Nicole , Vogel Mia T. , Zierler Brenda K. , Posner Jonathan D.
Published: May 2021

Introduction:

Interdisciplinary academic teams perform better when competent in teamwork; however, there is a lack of best practices of how to introduce and facilitate the development of effective learning and functioning within these teams in academic environments.

Methods:

To close this gap, we tailored, implemented, and evaluated team science training in the year-long Engineering Innovation in Health (EIH) program at the University of Washington (UW), a project-based course in which engineering students across several disciplines partner with health professionals to develop technical solutions to clinical and translational health challenges. EIH faculty from the UW College of Engineering and the Institute of Translational Health Sciences’ (ITHS) Team Science Core codeveloped and delivered team science training sessions and evaluated their impact with biannual surveys. A student cohort was surveyed prior to the implementation of the team science trainings, which served as a baseline.

Results:

Survey responses were compared within and between both cohorts (approximately 55 students each Fall Quarter and 30 students each Spring Quarter). Statistically significant improvements in measures of self-efficacy and interpersonal team climate (i.e., psychological safety) were observed within and between teams.

Conclusions:

Tailored team science training provided to student-professional teams resulted in measurable improvements in self-efficacy and interpersonal climate both of which are crucial for teamwork and intellectual risk taking. Future research is needed to determine long-term impacts of course participation on individual and team outcomes (e.g., patents, start-ups). Additionally, adaptability of this model to clinical and translational research teams in alternate formats and settings should be tested.
Surveillance cultures following a regional outbreak of carbapenem-resistant Acinetobacter baumannii
Authors: Rivera Frida , Reeme Allison , Graham Mary Beth , Buchan Blake W. , Ledeboer Nathan A. , Valley Ann M. , Munoz-Price L. Silvia
Published: May 2021

Objectives:

The primary aim of this study was to assess the epidemiology of carbapenem-resistant Acinetobacter baumannii (CRAB) for 9 months following a regional outbreak with this organism. We also aimed to determine the differential positivity rate from different body sites and characterize the longitudinal changes of surveillance test results among CRAB patients.

Design:

Observational study.

Setting:

A 607-bed tertiary-care teaching hospital in Milwaukee, Wisconsin.

Patients:

Any patient admitted from postacute care facilities and any patient housed in the same inpatient unit as a positive CRAB patient.

Methods:

Participants underwent CRAB surveillance cultures from tracheostomy secretions, skin, and stool from December 5, 2018, to September 6, 2019. Cultures were performed using a validated, qualitative culture method, and final bacterial identification was performed using mass spectrometry.

Results:

In total, 682 patients were tested for CRAB, of whom 16 (2.3%) were positive. Of the 16 CRAB-positive patients, 14 (87.5%) were residents from postacute care facilities and 11 (68.8%) were African American. Among positive patients, the positivity rates by body site were 38% (6 of 16) for tracheal aspirations, 56% (9 of 16) for skin, and 82% (13 of 16) for stool.

Conclusions:

Residents from postacute care facilities were more frequently colonized by CRAB than patients admitted from home. Stool had the highest yield for identification of CRAB.
A systematic review of systematic reviews of secondary health conditions, health promotion, and employment of people with intellectual disabilities
Authors: Iwanaga Kanako , Wu Jia Rung , Chan Fong , Rumrill Phillip , Wehman Paul , Brooke Valerie A. , Avellone Lauren , Taylor Joshua
Published: May 2021

This is a systematic review of systematic reviews of secondary health conditions, health promotion interventions, and employment in people with intellectual disabilities. Articles were included if they reported a systematic review of health and employment, secondary health conditions, and health promotion interventions for people with intellectual disabilities. The methodological quality of the included reviews was reviewed using theA MeaSurementTool toAssess systematicReviews quality rating system, a measurement tool to assess systematic reviews. Twenty-five systematic reviews were included. There was evidence that people with intellectual disabilities (ID) were at elevated risk for secondary health conditions, health promotion interventions can improve physical and mental health conditions, and employment is associated with better health-related quality of life. Health promotion intervention to help people with ID engage in health promoting behaviors can improve health and their ability to find and maintain employment.
Retrodicting large herbivore biomass for the last glacial maximum on the Palaeo-Agulhas Plain (South Africa) using modern ecological knowledge of African herbivore assemblages and rainfall
Authors: Brooke Christopher F. , Marean Curtis W. , Wren Colin D. , Fritz Hervé , Venter Jan A.
Published: May 2021

Herbivore distribution throughout Africa is strongly linked to mean annual precipitation. We use that relationship to predict functional group composition of herbivore communities during the last glacial maximum (ca. 21 ka) on the now submerged Palaeo-Agulhas Plain (PAP), South Africa. We used metabolic large herbivore biomass (MLHB) from 39 South African protected areas, in five functional groups (characterized by behavior and physiology). We examined how modern factors influenced MLHB and considered the effects of biome, annual rainfall, percentage winter rainfall, and protected area size. Overall, biome was the most important factor influencing the relationship between MLHB and rainfall. In general, MLHB increased with rainfall, but not for the grassland biome. Outside grasslands, most functional groups’ metabolic biomass increased with increasing rainfall, irrespective of biome, except for medium-sized social mixed feeder species in savanna and thicket. Protected area size was influential for medium-sized social mixed feeders and large browsers and rainfall influenced medium-sized social mixed feeders, offering some perspectives on spatial constraints on past large herbivore biomass densities. These results improve our understanding of the likely herbivore community composition and relative biomass structure on the PAP, an essential driver of how early humans utilized large mammals as a food resource.
Validity of a modified food and nutrition literacy questionnaire in primary school children in Iran
Authors: Khorramrouz Fatemeh , Doustmohammadian Azam , Amini Maryam , Pourhosein Sarivi Somayeh , Khadem-Rezaiyan Majid , Shadmand Foumani Moghadam Mohammad Reza , Khosravi Maryam
Published: May 2021

The present study aimed to assess the relative validity and reliability of a modified Food and Nutrition Literacy (M-FNLIT) questionnaire in primary school children in the city of Mashhad. The study was conducted in four phases. In the first step, the content and face validity of the questionnaire were evaluated by Delphi consensus as well as interviewing the students. Then, construct validity was examined using Confirmatory Factor Analysis (CFA). The internal consistency and reliability of the questionnaire were also assessed using Cronbach α and Intraclass Correlation Coefficient (ICC), respectively. Finally, a receiver operating characteristic analysis was performed to detect the cut-off scores of the M-FNLIT scale. Findings of two rounds of Delphi showed satisfactory levels of Content Validity Ratio: 0·72 and 0·92, Content Validity Index (CVI): 0·92 and 0·98, respectively. The results of CFA for domains and subscales of the M-FNLIT questionnaire including cognitive domain (understanding food and nutrition information and nutritional health knowledge) and skill domain (functional, food choice, interactive, and critical skills) indicated acceptable fit indices. M-FNLIT subscale-specific Cronbach α values ranged between 0·68 and 0·8 and ICC was 0·95 (95 % CI 0·93, 96). The final questionnaire included forty items (thirty-six Likert-type and four true-false items). FNLIT scores were categorized as low (≤ 58), medium (> 58–< 81), and high (≥ 81). The M-FNLIT questionnaire has a good level of validity and reliability to measure food and nutrition literacy in primary school children. The questionnaire can be applied in the evaluation of nutritional interventions in this age group.
When Does Income Inequality Cause Polarization?
Authors: Gunderson Jacob R.
Published: May 2021

Scholars have long been concerned with the implications of income inequality for democracy. Conventional wisdom suggests that high income inequality is associated with political parties taking polarized positions as the left advocates for increased redistribution while the right aims to entrench the position of economic elites. This article argues that the connection between party positions and income inequality depends on how party bases are sorted by income and the issue content of national elections. It uses data from European national elections from 1996 to 2016 to show that income inequality has a positive relationship with party polarization on economic issues when partisans are sorted with respect to income and when economic issues are relatively salient in elections. When these factors are weak, however, the author finds no relationship between income inequality and polarization.
Association of body condition with lameness in dairy cattle: a single-farm longitudinal study
Authors: Kranepuhl Michaela , May Detlef , Hillmann Edna , Gygax Lorenz
Published: May 2021

This research communication describes the relationship between the occurrence of lameness and body condition score (BCS) in a sample of 288 cows from a single farm that were repeatedly scored in the course of 9 months while controlling for confounding variables. The relationship between BCS and lameness was evaluated using generalised linear mixed-effects models. It was found that the proportion of lame cows was higher with decreasing but also with increasing BCS, increased with lactation number and decreased with time since the last claw trimming. This is likely to reflect the importance of sufficient body condition in the prevention of lameness but also raises the question of the impact of overcondition on lameness and the influence of claw trimming events on the assessment of lameness. A stronger focus on BCS might allow improved management of lameness that is still one of the major problems in housed cows.
Use of the Comprehensive Climate Index to estimate heat stress response of grazing dairy cows in a temperate climate region
Authors: Arias Rodrigo A. , Delgado Cynthia , Keim Juan Pablo , Gandarillas Mónica
Published: May 2021

The aim of the study was to assess the effect of the summer thermal environment on physiological responses, behaviour, milk production and its composition on grazing dairy cows in a temperate climate region, according to the stage of lactation. Twenty-nine Holstein Friesian multiparous cows were randomly selected and divided into two groups, according to the days in milk, as mid-lactation (99 to 170 d in milk, n = 15) and late lactation (225 to 311 d in milk, n = 14). The comprehensive climate index (CCI) was used to classify the hour of each day as thermoneutral or heat stress, considering a threshold value of CCI of 20°C. Data were collected for 16 d (summer 2017) and analysed as a completely randomized 2 × 2 factorial arrangement with repeated measurements over time. Vaginal temperature increased with CCI ≥ 20°C. Respiration rates were dependent on the thermal condition, regardless of days in milk. There was an interaction between the time of day and the CCI category for activity and rumination. Grazing activity decreased by 17.6% but lying down, standing, and shaded animals increased by 1.6, 9.8, and 6.3% respectively when CCI ≥ 20°C. Over 80% of cows presented a panting score ≥1. However, milk production and composition (fat, protein, and lactose concentrations as well as somatic cell count) were not affected by the thermal condition, although there was a numerical (non-significant) decrease in afternoon milk protein concentration on days with CCI ≥ 20°C, while urea in milk increased. In conclusion, thermal condition challenged grazing dairy cows' behaviour and physiology independent of the stage of lactation but had little or no effect on milk production.
Proteomic profiling of ovine milk after grading up
Authors: Su Xiaohu , Zheng Zhong , Zhang Liguo , Bai Urhan , Ma Ying , Dou Yingjie , Zhang Xiaoran , Su Guanghua , Zhou Ningcong , Li Guangpeng , Zhang Li
Published: May 2021

We have previously bred Chinese local dairy sheep through grading up with local Small-Tailed Han (STH) sheep as female parent and DairyMeade (DM) sheep as male parent. In this research communication we characterize the whey protein profile of STH sheep and their offspring (F1, F2) to reveal physiological differences and variation in milk traits. A total of 1032 whey proteins were identified through tandem mass tag labeling (TMT) proteome profiling. Three proteins were significantly differentially abundant between F1 and STH milk, six between F2 and STH milk and five between F1 and F2 milk. In terms of differential changes between generations, WASHC4 and CUTA of F1 and Ig-like domain-containing protein of F2 milk were dominant whey proteins. Overall, the results showed that the whey protein profiles of different generations varied little. The crossbreeds of STH and DM sheep would be suitable for the development of the Chinese local sheep milk industry, and the F2 may be a better population for sheep milk production.
Non-attendance at an out-patient otolaryngology and head and neck clinic in New Zealand: impact of coronavirus disease 2019, and demographic, clinical and environmental factors
Authors: Ahmadi O , Maher W , White J
Published: May 2021

Background

Fear of contracting coronavirus disease 2019 may be the latest addition to the barriers to clinic attendance. This study aimed to examine the impact of coronavirus disease 2019 and other variables on non-attendance rate at an out-patient clinic.

Methods

Clinic attendance at the Department of Otolaryngology and Head and Neck Surgery, Waikato Hospital, New Zealand, was assessed. For each appointment, the impact of coronavirus disease 2019 and other variables on non-attendance rate were analysed.

Results

In total, 1963 appointments were scheduled, with 194 non-attendances (9.9 per cent). Patients who had their appointments confirmed beforehand were 10.0 times more likely to attend their appointment. Sex, socioeconomic status, ethnicity and age were found to impact non-attendance rate.

Conclusion

In New Zealand, coronavirus disease 2019 does not appear to be a barrier to out-patient clinic appointment attendance. The patient's age, sex, ethnicity, socioeconomic status and prior appointment confirmation were found to influence clinic attendance.
Simple, general, realistic, robust, analytic tokamak equilibria. Part 1. Limiter and divertor tokamaks
Authors: Guazzotto L. , Freidberg J. P.
Published: May 2021

Tokamak equilibria have been derived that are analytic solutions to the Grad–Shafranov equation. This paper, Part 1, describes a wide range of such equilibria including smooth limiter surfaces, double- and single-null divertor surfaces, arbitrary aspect ratio, elongation, triangularity and beta. Part 2 generalizes the analysis to include edge pedestals and toroidal flow.
Meta-analysis of structural evidence for the Hierarchical Taxonomy of Psychopathology (HiTOP) model
Authors: Ringwald Whitney R. , Forbes Miriam K. , Wright Aidan G. C.
Published: May 2021

Background

The Hierarchical Taxonomy of Psychopathology (HiTOP) is a classification system that seeks to organize psychopathology using quantitative evidence – yet the current model was established by narrative review. This meta-analysis provides a quantitative synthesis of literature on transdiagnostic dimensions of psychopathology to evaluate the validity of the HiTOP framework.

Methods

Published studies estimating factor-analytic models from diagnostic and statistical manual of mental disorders (DSM) diagnoses were screened. A total of 120,596 participants from 35 studies assessing 23 DSM diagnoses were included in the meta-analytic models. Data were pooled into a meta-analytic correlation matrix using a random effects model. Exploratory factor analyses were conducted using the pooled correlation matrix. A hierarchical structure was estimated by extracting one to five factors representing levels of the HiTOP framework, then calculating congruence coefficients between factors at sequential levels.

Results

Five transdiagnostic dimensions fit the DSM diagnoses well (comparative fit index = 0.92, root mean square error of approximation = 0.07, and standardized root-mean-square residual = 0.03). Most diagnoses had factor loadings >|0.30| on the expected factors, and congruence coefficients between factors indicated a hierarchical structure consistent with the HiTOP framework.

Conclusions

A model closely resembling the HiTOP framework fit the data well and placement of DSM diagnoses within transdiagnostic dimensions were largely confirmed, supporting it as valid structure for conceptualizing and organizing psychopathology. Results also suggest transdiagnostic research should (1) use traits, narrow symptoms, and dimensional measures of psychopathology instead of DSM diagnoses, (2) assess a broader array of constructs, and (3) increase focus on understudied pathologies.
‘Comme une chanson de Bruant’: marginality, nostalgia and protest during the 1968 years
Authors: Cannon James
Published: May 2021

The ‘1968 years’ (1968–1981) witnessed a resurgence of interest in the late 19th-century singer-songwriter and cabaret performer Aristide Bruant (1851–1925). This article explores the social and cultural origins of this Bruant ‘moment’, arguing that it was linked both to a culture of marginality that emerged during the events of May–June 1968 and to a culture of nostalgia (‘la mode rétro’) first identified in 1973. It focuses on five performers who revived or renewed Bruant's legacy during the 1968 years: Mouloudji, Francesca Solleville, Marc Ogeret, François Béranger and Renaud.
ADD-RRV for motion planning in complex environments
Authors: Cai Peng , Yue Xiaokui , Zhang Hongwen
Published: May 2021

In this paper, we present a novel sampling-based motion planning method in various complex environments, especially with narrow passages. We use online the results of the planner in the ADD-RRT framework to identify the types of the local configuration space based on the principal component analysis (PCA). The identification result is then used to accelerate the expansion similar to RRV around obstacles and through narrow passages. We also propose a modified bridge test to identify the entrance of a narrow passage and boost samples inside it. We have compared our method with known motion planners in several scenarios through simulations. Our method shows the best performance across all the tested planners in the tested scenarios.
Tele-operation of an industrial robot by an arm exoskeleton for peg-in-hole operation using immersive environments
Authors: Kansal Sachin , Zubair Mohd , Suthar Bhivraj , Mukherjee Sudipto
Published: May 2021

The design and development of an upper limb exoskeleton are being discussed for the tele-operation in order to control the KUKA KR5 industrial robot. When sufficient resolution is not provided by the visual feedback, feedback of haptic provides a qualitative understanding of changes in the remote conditions. This also provides tactile feedback from the virtual and real environment. Peg in a hole operation using exoskeleton works as the master for tele-operation in order to control the robot using immersive environment as visual feedback for the operator. The application of this work can be implemented as a nuclear power generation plant.
The Conservative Press and the Interwar Origins of First Amendment Lochnerism
Authors: Lebovic Sam
Published: May 2021

In the 1930s and 1940s, the conservative newspaper industry argued that the First Amendment should shield them from New Deal economic regulations. This article uses these forgotten clashes about freedom of the press to provide a new history of the origins and trajectory of the anti-regulatory First Amendment. It shows that conservative newspaper attorneys were at the forefront of efforts to use civil liberties to protect their economic interests in the New Deal. But it argues that these efforts were only partially successful. The courts rejected these maximalist First Amendment claims, distinguishing between economic liberties and civil liberties. But maximalist claims were more successful in the political culture, where conservative newspapers helped legitimize a belief that a laissez-faire “marketplace of ideas“ was a liberal principle with deep roots in the past. The origins of First Amendment Lochnerism thus lie not in judicial precedent, but in contestation in the political culture. A clearer understanding of the dynamics of this long-running effort to deploy civil liberties claims for conservative purposes, the article concludes, will help us better navigate the contemporary crises of the First Amendment.
Pay to Play? How Reducing APSA Division Fees Increases Graduate Student Participation
Authors: Fairbanks Bailey R. , Neuner Fabian G. , Perera Isabel M. , Slaughter Christine M.
Published: May 2021

In 2017, the American Political Science Association (APSA) Committee on the Status of Graduate Students in the Profession launched an initiative to lower the cost of Division (i.e., organized section) membership for students to promote graduate students’ professional development and to advance Division interests. This article assesses the effect of this intervention on Division membership. Using APSA membership data, we find that almost two thirds of Divisions that charged fees in 2017 reduced or eliminated student fees between 2017 and 2019, nearly halving the average student dues (i.e., from $11.57 in 2017 to $5.84 in 2019). As a result, average student membership increased by more than 300% in Divisions that reduced fees (i.e., from 79.5 in 2017 to 248.7 in 2019), compared to a marginal 30% increase in those that did not reduce fees. These outcomes of the initiative support additional efforts to reduce the costs of APSA participation for graduate students.
Dalton and Putnam: Teaching Political Polarization to Generation Z Students
Authors: McBeth Mark K. , Belyea Jules , Perry Andrew
Published: May 2021

Political polarization and generational politics are important topics in contemporary political science classrooms. This article presents an approach to teaching political polarization in an introduction to politics course. Coauthored by two Generation Z students from the course and their Boomer Generation professor, the article provides conflicting views of young people and politics as found in the work of Robert Putnam and Russell Dalton. The article presents survey data on affective and issue political polarization from the course, including discussion by the two student coauthors of the survey results interpreting their generation’s political polarization. The course approaches the introductory politics course using cognitive psychology concepts including confirmative bias, motivated reasoning, and other cognitive biases. Teaching from this micro-level perspective helps students to reflect on their own political biases. The article provides concepts and readings for political science professors to use in replicating the course.
The challenges of China–India comparative urban studies
Authors: Frazier Mark W.
Published: May 2021

Scholarship on urban China and urban India has been prolific. Studies have separately addressed urban processes of migration, spatial transformation, governance, infrastructure, land conflicts, policing, and more. However, research on these areas has rarely intersected. This article discusses the challenges of comparison in China–India urban studies, and examines recent works through an analysis of “styles and scales of comparison.” Some seek to explain national-level variations by studying selected cities in each country. Others identify convergence and divergence in the context of broader global processes, and some incorporate historical trajectories to structure a temporal comparison. Because the most rapid periods of urbanization in the first half of the twenty-first century will take place in India and China and will soon account almost half of the planet's urban population, studies of urbanization in India and China are of great importance. Careful reflection on the study of urbanization in China–India studies can also re-center urban studies away from the historically dominant American/Eurocentric perspectives.
Theory in closer contact with industrial life: American institutional economists on competition theory and policy
Authors: Panhans Matthew T. , Schumacher Reinhard
Published: May 2021

This paper investigates the views on competition theory and policy of the American institutional economists during the first half of the 20th century. These perspectives contrasted with those of contemporary neoclassical and later mainstream economic approaches. We identify three distinct dimensions to an institutionalist perspective on competition. First, institutionalist approaches focused on describing industry details, so as to bring theory into closer contact with reality. Second, institutionalists emphasized that while competition was sometimes beneficial, it could also be disruptive. Third, institutionalists had a broad view of the objectives of competition policy that extended beyond effects on consumer welfare. Consequently, institutionalists advocated for a wide range of policies to enhance competition, including industrial self-regulation, broad stakeholder representation within corporations, and direct governmental regulations. Their experimental attitude implied that policy would always be evolving, and antitrust enforcement might be only one stage in the development toward a regime of industrial regulation.
How Does a Pinatubo‐Size Volcanic Cloud Reach the Middle Stratosphere?
Authors: Stenchikov Georgiy , Ukhov Alexander , Osipov Sergey , Ahmadov Ravan , Grell Georg , Cady‐Pereira Karen , Mlawer Eli , Iacono Michael
Published: May 2021

Volcanic explosions are the most critical replenishing mechanism of the stratospheric aerosol Junge layer. A fresh volcanic cloud comprises mostly sulfur‐bearing gases, volcanic ash, and water vapor. It is commonly assumed that only sulfate aerosols remain in an aged volcanic cloud. Accurate simulation of the initial evolution of multicomponent fresh volcanic clouds is largely missing due to insufficient spatial resolution and a lack of relevant physics in global climate models. However, this initial stage is essential, as the vertical structure, composition, and altitude of a freshly developed volcanic cloud affect its long‐term evolution. To fill this gap, we modified a regional WRF‐Chem model to study the dispersion of a Pinatubo‐size volcanic cloud in the equatorial belt with a 25 km grid spacing explicitly accounting for the SO2, ash, sulfate, water vapor, and hydrometeors radiative effects. The model best reproduces the observed evolution of the Pinatubo optical depth when eruptive products are injected above the cold tropical tropopause at 17 km. During the first week, the volcanic cloud in our simulations rises 1 km/day. Ash is primarily responsible for the heating and lofting of the volcanic products. Radiative heating of SO2 is weaker than that of ash and sulfate but is sufficient to position the core of the SO2 layer 1–2 km above the sulfate layer. Utilizing a more realistic description of the volcanic cloud's initial stage potentially improves overall volcanic cloud predictability. It might also be essential to designing geoengineering technologies based on the injection of aerosol precursors in the lower stratosphere.
Lunar Photoemission Yields Inferred From ARTEMIS Measurements
Authors: Xu Shaosui , Poppe Andrew R. , Harada Yuki , Halekas Jasper S. , Chamberlin Phillip C.
Published: May 2021

Photoemission yield (the number of emitted electrons per incoming photon) is one of the fundamental properties of solid materials but is not yet well constrained for the lunar surface for photon energies >∼20 eV. In this study, we constrain this yield for incident photons with energies of ∼10–500 eV with data from the Acceleration, Reconnection, Turbulence, and Electrodynamics of the Moon's Interaction with the Sun (ARTEMIS) mission along with solar irradiance spectra from Version 2 of the Flare Irradiance Spectral Model. We also report the first oxygen Auger electron observations at the Moon by the ARTEMIS spacecraft, which provides a unique feature to identify photoelectrons emitted from the lunar surface. With lunar photoelectron observations identified in both Earth's magnetotail lobes and the solar wind for four selected days, we infer a lower bound of 10−3 in yield for photon energies >∼20 eV. However, our investigation also reveals an uncertainty over ∼4 orders of magnitude in derived yields with a sensitivity study, owing to a poorly constrained photoelectron energy probability function. This uncertainty motivates future experiments on lunar samples to better characterize the lunar surface charging environment.
Why Atmospheric Backscatter Is Important in the Formation of Electron Precipitation in the Diffuse Aurora
Authors: Khazanov George V. , Chen Margaret W.
Published: May 2021

In addition to wave particle scattering in the magnetosphere, atmospheric backscatter of magnetospheric electrons is an important process that contributes to the formation of the precipitated electrons in the region of diffuse aurora. Two magnetically conjugate regions are involved in a complex magnetosphere‐ionosphere (MI) particle and energy interplay. Based on synthesizing previous theoretical/modeling studies and experimental evidence, we demonstrate the need for improving the quantification of magnetospheric electrons backscatter processes that can affect inner magnetospheric electrodynamics, transport and loss in a way that is not easily predicted. We discuss how these complex and energy‐dependent MI coupled processes can be treated in magnetospheric modeling.
Impacts of Fully Coupling Land Surface and Flood Models on the Simulation of Large Wetlands' Water Dynamics: The Case of the Inner Niger Delta
Authors: Getirana Augusto , Kumar Sujay V. , Konapala Goutam , Ndehedehe Christopher E.
Published: May 2021

It is known that representing wetland dynamics in land surface modeling improves models' capacity to reproduce fluxes and land surface boundary conditions for atmospheric modeling in general circulation models. This study presents the development of the full coupling between the Noah‐MP land surface model (LSM) and the Hydrological Modeling and Analysis Platform (HyMAP) flood model in the NASA Land Information System and its application over the Inner Niger Delta (IND), a well‐known hot‐spot of strong land surface‐atmosphere interactions in West Africa. Here, we define two experiments at 0.02° spatial resolution over 2002–2018 to quantify the impacts of the proposed developments on simulating IND dynamics. One represents the one‐way approach for simulating land surface and flooding processes (1‐WAY), that is, Noah‐MP neglects surface water availability, and the proposed two‐way coupling (2‐WAY), where Noah‐MP takes surface water availability into account in the vertical water and energy balance. Results show that accounting for two‐way interactions between Noah‐MP and HyMAP over IND improves simulations of all selected hydrological variables. Compared to 1‐WAY, evapotranspiration derived from 2‐WAY over flooding zones doubles, increased by 0.8 mm/day, resulting in an additional water loss rate of ∼18,900 km3/year, ∼40% drop of wetland extent during wet seasons, and major improvement in simulated water level variability at multiple locations. Significant soil moisture increase and surface temperature drop were also observed. Wetland outflows decreased by 35%, resulting in a substantial Nash‐Sutcliffe coefficient improvement, from −0.73 to 0.79. It is anticipated that future developments in water monitoring and water‐related disaster warning systems will considerably benefit from these findings.
The laterodorsal tegmentum-ventral tegmental area circuit controls depression-like behaviors by activating ErbB4 in DA neurons
Authors: Wang Hongsheng , Cui Wanpeng , Chen Wenbing , Liu Fang , Dong Zhaoqi , Xing Guanglin , Luo Bin , Gao Nannan , Zou Wen-Jun , Zhao Kai , Zhang Hongsheng , Ren Xiao , Yu Zheng , Robinson Heath L. , Liu Zhipeng , Xiong Wen-Cheng , Mei Lin
Published: May 2021

Dopamine (DA) neurons in the ventral tegmental area (VTA) are critical to coping with stress. However, molecular mechanisms regulating their activity and stress-induced depression were not well understood. We found that the receptor tyrosine kinase ErbB4 in VTA was activated in stress-susceptible mice. Deleting ErbB4 in VTA or in DA neurons, or chemical genetic inhibition of ErbB4 kinase activity in VTA suppressed the development of chronic social defeat stress (CSDS)-induced depression-like behaviors. ErbB4 activation required the expression of NRG1 in the laterodorsal tegmentum (LDTg); LDTg-specific deletion of NRG1 inhibited depression-like behaviors. NRG1 and ErbB4 suppressed potassium currents of VTA DA neurons and increased their firing activity. Finally, we showed that acute inhibition of ErbB4 after stress attenuated DA neuron hyperactivity and expression of depression-like behaviors. Together, these observations demonstrate a critical role of NRG1-ErbB4 signaling in regulating depression-like behaviors and identify an unexpected mechanism by which the LDTg-VTA circuit regulates the activity of DA neurons.
CG6015 controls spermatogonia transit-amplifying divisions by epidermal growth factor receptor signaling in Drosophila testes
Authors: Yu Jun , Zheng Qianwen , Li Zhiran , Wu Yunhao , Fu Yangbo , Wu Xiaolong , Lin Dengfeng , Shen Cong , Zheng Bo , Sun Fei
Published: May 2021

Spermatogonia transit-amplifying (TA) divisions are crucial for the differentiation of germline stem cell daughters. However, the underlying mechanism is largely unknown. In the present study, we demonstrated that CG6015 was essential for spermatogonia TA-divisions and elongated spermatozoon development inDrosophilamelanogaster. Spermatogonia deficient in CG6015 inhibited germline differentiation leading to the accumulation of undifferentiated cell populations. Transcriptome profiling using RNA sequencing indicated that CG6015 was involved in spermatogenesis, spermatid differentiation, and metabolic processes. Gene Set Enrichment Analysis (GSEA) revealed the relationship between CG6015 and the epidermal growth factor receptor (EGFR) signaling pathway. Unexpectedly, we discovered that phosphorylated extracellular regulated kinase (dpERK) signals were activated in germline stem cell (GSC)-like cells after reduction of CG6015 in spermatogonia. Moreover, Downstream of raf1 (Dsor1), a key downstream target of EGFR, mimicked the phenotype of CG6015, and germline dpERK signals were activated in spermatogonia ofDsor1RNAi testes. Together, these findings revealed a potential regulatory mechanism of CG6015 via EGFR signaling during spermatogonia TA-divisions inDrosophilatestes.
Magneto-active elastic shells with tunable buckling strength
Authors: Yan Dong , Pezzulla Matteo , Cruveiller Lilian , Abbasi Arefeh , Reis Pedro M.
Published: May 2021

Shell buckling is central in many biological structures and advanced functional materials, even if, traditionally, this elastic instability has been regarded as a catastrophic phenomenon to be avoided for engineering structures. Either way, predicting critical buckling conditions remains a long-standing challenge. The subcritical nature of shell buckling imparts extreme sensitivity to material and geometric imperfections. Consequently, measured critical loads are inevitably lower than classic theoretical predictions. Here, we present a robust mechanism to dynamically tune the buckling strength of shells, exploiting the coupling between mechanics and magnetism. Our experiments on pressurized spherical shells made of a hard-magnetic elastomer demonstrate the tunability of their buckling pressure via magnetic actuation. We develop a theoretical model for thin magnetic elastic shells, which rationalizes the underlying mechanism, in excellent agreement with experiments. A dimensionless magneto-elastic buckling number is recognized as the key governing parameter, combining the geometric, mechanical, and magnetic properties of the system.